This method is for manufacturing an engine poppet valve having an umbrella part and a shaft part integrated via a neck part the diameter of which increases toward the tip. The method comprises: an umbrella part manufacturing step for forming, by hot forging, an shaft umbrella intermediate product provided with an intermediate shaft part and an umbrella part integrated with the intermediate shaft part via the neck part; a stepped shaft part manufacturing step for forming, from the intermediate shaft part, a stepped shaft part provided with a first shaft part that, by performing cold drawing machining of press fitting a portion of the intermediate shaft part to a wire material introduction surface and the shaft material compression surface from a base end with respect to a hollow circular hole die having a shaft material introduction surface gradually tapered off toward the center axis and reducing holes at least partially having a shaft material compression surface continuous to the shaft material introduction surface and provided with a fixed inner diameter less than the outer diameter of the intermediate shaft part, has a diameter reduced, a stepped part that is formed by the shaft material introduction surface, and a second shaft part that is connected to the first shaft part via the stepped part with a non-reduced diameter; and a joining step for joining a shaft end part having an outer diameter equal to that of the first shaft part to the base end of the first shaft part.
A reduction gear W1 reduces the rotation speed input to an input shaft 1 and outputs the rotation speed to an output shaft, and has: an inner trochoid 8 on an inner circumferential surface of which an undulating curved surface is formed; an inner trochoid holding part 9 for holding the inner trochoid 8; an outer trochoid 3 on the outer circumferential surface of which an undulating curved surface is formed; a spinning restriction part for restricting spinning of the outer trochoid 3; and output pins 9 sandwiched between the outer circumferential surface of the outer trochoid 3 and the inner circumferential surface of the inner trochoid 8. The outer trochoid 3 receives eccentric input from the input shaft 1, spinning being restricted by the spinning restriction part, and revolves around the rotational axis of the input shaft 1. The inner trochoid holding part transmits the eccentric input due to the rotation of the input shaft 1 to the inner trochoid 8, causing the inner trochoid 8 to revolve around the axis of rotation of the input shaft 1, and causing the inner trochoid 8 to spin in the same direction as the rotation direction of the input shaft 1.
F16H 1/32 - Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
Provided is an electric power steering device in which a rotation transmission mechanism can be easily assembled with respect to a drive conversion mechanism within the electric power steering device. An electric power steering device (1) comprises a rotation transmission mechanism (2) that rotates a nut mechanism (16) by means of rotation of an electric motor, and a motive power conversion mechanism (3) that converts a rotation motion of the nut mechanism to a linear reciprocating motion of a rack shaft (15) so as to assist a linear motion of the rack shaft (15), wherein the rotation transmission mechanism (2) includes: a driving gear mechanism (4) having a driving pinion gear (4a) that rotates by means of the electric motor, and a pair of driven pinion gears (8) which include first and second pinion gears (8a, 8b) formed coaxially and integrally, and which rotate by means of a driving pinion gear (7a); a driven gear mechanism (5) that receives a rotational torque from the driving gear mechanism (4) so as to rotate the nut mechanism (16); and a clip (6) that positions and holds the pair of driven pinion gears (8) in a state of being spaced apart.
B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
F16H 3/083 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously- meshing gears, that can be disengaged from their shafts with radially acting and axially controlled clutching members, e.g. sliding keys
F16H 25/24 - Elements essential to such mechanisms, e.g. screws, nuts
Provided is an electric power steering device that can be mounted in large vehicles and reduced in size. An electric power steering device (1) comprising a rotation transmission mechanism (2) that transmits the rotation of an electric motor to rotate a nut mechanism and a power conversion mechanism that converts the rotary motion of the nut mechanism into a reciprocating linear motion of a rack shaft (15) to assist the linear motion of the rack shaft (15) during steering operations, wherein the power conversion mechanism is formed as a sliding screw mechanism (3) which has the rack shaft (15) with male threads (15a) on the outer circumference and a sliding nut mechanism (16) rotatably screwed to the outer circumference of the rack shaft (15).
B62D 5/04 - Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
F16H 3/083 - Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously- meshing gears, that can be disengaged from their shafts with radially acting and axially controlled clutching members, e.g. sliding keys
F16H 25/24 - Elements essential to such mechanisms, e.g. screws, nuts
5.
STRUCTURE FOR ASSEMBLING ROLLING ROLLER TO PISTON ROD
Provided is a structure for assembling a rolling roller to a piston rod such that no protrusion is created on the sliding surface of the piston rod even when a pin is press-fitted into the through hole of the piston rod. This structure for assembling a rolling roller (10) to a piston rod (1) comprises: an elongated hole (3) that is provided in the piston rod (1) integrated with a piston (2); first and second through holes (6, 7) that are provided in a pair of elongated-hole formation walls (4, 5) forming the elongated hole (3); and the rolling roller (10) that is rotatably supported by a pin (8) press-fitted and fixed in the second through hole (7). This structure for assembling the rolling roller (10) to the piston rod (1) is configured such that, while the rolling roller (10) is disposed between the pair of elongated-hole formation walls (4, 5), the leading end (8a) of the pin (8) inserted into the first through hole (6) and an inscribed hole (9) is press-fit into the second through hole. A tapered hole side chamfered portion (7b) is provided in the inner peripheral edge of the second through hole (7). A tapered or arc-shaped pin side chamfered portion (11) including at least an arc-shaped portion is provided in the outer peripheral edge of the leading end of the pin (8).
Provided is a method for manufacturing an engine poppet valve with which various types of manufacturing can be performed at low cost. This method for manufacturing an engine poppet valve (21) comprises: a forging step for forming a metallic intermediate member (2) in which an intermediate shaft section (3) and an umbrella section (24) are integrated via a neck section (23); a diameter reduction step; and a joining step for joining a shaft end member (25b) having the same outer diameter (D3) as the main body section (25a) to a base end section (25c) of the main body section (25a). In the diameter reduction step, the intermediate shaft section (3) is inserted between a plurality of diameter-reducing tools (9a), each having a shaft material compression surface (9c) and a shaft material introducing surface (9d) formed to be gradually spaced apart toward the tip side from the compression surface (9c), and each being arranged at circumferentially regular intervals with respect to the outer circumference of the intermediate shaft section (3); radially inward compressive force is loaded from the compression surface (9c) of each diameter-reducing tool (9a) brought into contact with a portion of the intermediate shaft section (3) that rotates while performing relative displacement in the direction along the central axis line (O) of the intermediate shaft section to thereby reduce the diameter of a portion of the intermediate shaft section (3) and form a main body section (25a) of a first shaft part (25) on the intermediate member (2) and form a stepped section (26) continuous to the main body section (25a) with the compression surface (9c); and a second shaft part (27) is formed that is continuous to the main body section (25a) via the stepped section (26) by virtue of the non-diameter-reduced remaining portion of the intermediate shaft section (3) and that is thicker than the main body section (25a).
Provided is a method of manufacturing an engine valve intermediate product in which only a boss portion for forming a piston part or a vane part is provided with a required high strength and with which it is possible to form the boss portion at any location spaced apart from a head-forming part on a shaft-forming part. A method of manufacturing an intermediate product (2) with an engine valve boss portion (11), the intermediate product (2) integrally having a head-forming part (4) with a maximum outer diameter greater than a shaft-forming part (3), wherein the boss portion (11) has an outer diameter greater than the shaft-forming part (3) and is integrally formed on the outer periphery of an intermediate portion of the shaft-forming part, the method being provided with: a shaft holding step in which the intermediate portion of the shaft-forming part (3) is held using a plurality of intermediate jigs (6a to 6c) which are detachable radially from the center of the shaft-forming part (3), and a proximal end part (3b) is held with a proximal end jig (5); and a shaft enlarging step in which the intermediate product (2) is rotated and, while applying an alternating load for causing tensile force and compressive force to alternately and repeatedly act on the outer periphery of the shaft-forming part (3), compressive force is applied to the intermediate product (2) from both ends thereof to form the boss portion (11).
A valve lifter with a variable lift mechanism is required to be deployed at a predetermined angle with respect to a cam unit, and the present invention is intended to achieve this requirement with a simple configuration without too much processing such as a fitting of the conventional longitudinal groove and a pin.
A cam sliding contact surface of a valve lifter on which a high lift cam and a low lift cam slides is formed to be a smooth inclined surface and a cam slide starting point is lower than a cam slide terminating point, thereby establishing an elevation difference between the cam slide starting point and the cam slide terminating point. As a result, since the high lift cam and the low lift cam always move uphill on the cam sliding contact surface, namely, from the low cam slide starting point toward the high cam terminating point along the slope of the cam sliding contact surface, the valve lifter is not subjected to a force around the reciprocating axis from the cam and therefore, the direction of the valve lifter is maintained constant.
Provided is a mechanical lash adjuster including a plunger, a housing put into thread engagement with the plunger in an axial direction to form a thread engagement portion, the plunger engaging member fixed and retained in a circumferential direction of the thread engagement portion, and a coil spring urging the plunger in a direction opposite to a urging-force acting direction of a coil spring. A lead and flank angles of threads forming the thread engagement portion are set such that when an axial load acts on the plunger in either of a plunger extension and contraction directions, the plunger is made self-sustaining, and when the plunger swings by an amount corresponding to a backlash due to a lateral load, the plunger slides and rotates at the thread engagement portion to move in an axial-load acting direction.
The present invention provides a waste gate valve that is capable of reducing cost and overall weight by achieving a compact attachment plate. This waste gate valve (50) is entirely formed substantially in an L-shape when viewed in a plan view such that a rotating shaft (58) is offset from a valve body (56) and extends in a direction substantially perpendicular to a center axis (O) of the valve body (56) from an attachment plate (52) that supports the valve body (56), the rotating shaft body (58A) being fixed by solid-phase bonding to a side part of the attachment plate (56). By achieving the compact attachment plate (56), cost reduction and an overall weight reduction of a valve (50) is achieved, and design constraints of an exhaust gas flow path (9) provided with a bypass flow path (10) are also alleviated.
Provided is a hollow exhaust poppet valve that has a simple structure and that exhibits a cooling effect similar to or greater than that of an umbrella hollow valve at a low to medium speed of an engine. A hollow exhaust poppet valve (1) has an umbrella part (4), a shaft part (2), and a neck part (3) the diameter of which increases toward the leading end, with a refrigerant (14) loaded in a hollow part (9) that is formed from the umbrella part (4) to the shaft part (2), wherein: the shaft part (2) has a first shaft section (5) on the base end side and a second shaft section (7) that is integrated with the neck part (3) and that is integrated with the first shaft section (5) via a step section (6); and the hollow part (9) is provided with a first hollow section (10) that is formed inside of the first shaft section (5) and a second hollow section (12) that is formed inside of the second shaft section (5), the neck part (3), and the umbrella part (4) so as to have a constant inner diameter (d2) larger than that of the first hollow section (10) and that is formed so as to be contiguous with the first hollow section (10) via a tapered part or a bent part.
Provided is a valve for internal combustion engines, which is capable of minimizing the possibility of detachment of an outer peripheral part of a heat insulating layer firmly fixed to a valve bottom surface. A valve bottom surface (5) is directed to a combustion chamber (S), a heat insulating layer (11) is firmly fixed to the valve bottom surface (5), a peripheral wall part (16) is provided integrally with the valve bottom surface (5) in such a manner as to surround the heat insulating layer (11), and the inner peripheral surface (16i) of the peripheral wall part (16) contacts the entire peripheral surface (11p) of the heat insulating layer (11) over the entire thickness range from the valve bottom surface (5) to the surface of the heat insulating layer (11).
Provided are a multi-row ball bearing and a manufacturing method therefor with which a radial load can be dispersed effectively while reducing frictional force when an inner ring and an outer ring rotate relative to one another. A plurality of ball rows (5) are interposed between an inner ring (3) and an outer ring (4) so as to be adjacent to one another, and each of the plurality of ball rows (5) is arranged such that the balls (5a) are arranged at a prescribed interval (L), and such that each ball row (5) is offset in the row direction with respect to the ball rows (5) adjacent to that ball row (5). Each ball (5a) in each ball row (5) faces a space (LS) of the prescribed interval (L) in each ball row (5) adjacent to that ball row (5), and is in contact with two balls (5a) forming each prescribed interval (L).
F16C 19/08 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with two or more rows of balls
F16C 43/06 - Placing rolling bodies in cages or bearings
A hollow low-current single-phase induction motor capable of starting under its own power may have a stator and a rotor. The stator may comprise a case and a winding. The case may have a base, an annular outer circumferential wall, an annular inner circumferential wall, a plurality of first extensions formed at the outer circumferential wall, and a plurality of second extensions formed at the inner circumferential wall so as to respectively face the first extensions. The rotor may have a flange, a plurality of coil supports formed along the outside circumference of the flange, and a plurality of annular rotor coils which are attached to the respective coil supports. The coil supports may be inserted between the first extensions and the second extensions such that at least one thereamong is misaligned in the circumferential direction relative to the first extensions and the second extensions.
A waste gate valve 6 has a valve 7, an arm member 8, and a stopper 9. The valve has a valve shaft 71 and a valve body 72. The arm member has a support part 82 provided with an attachment hole 82a through which the valve shaft 71 is inserted, and an arm shaft 81 and actuator 83 that move the support part 82. The stopper 9 extends out in a direction orthogonal to the axis of the valve shaft 71, and is provided to a distal-end portion protruding from the attachment hole 82a. The stopper 9-side outer peripheral part of the attachment hole 82a of the support part 82 is provided with an inclined part AI that is inclined relative to the direction orthogonal to the axis of the valve shaft 71. The stopper 9 is provided with an inclined part SI that is inclined relative to the direction orthogonal to the axis of the valve shaft 71, and that comes into contact with the inclined part AI and the support part 82 when the support part 82 is moved in a direction away from a bypass passage 40.
Provided are: a machining apparatus capable of drilling from the end face of the expanded diameter section in a long workpiece and capable of drilling from the end face of the shaft section in a short workpiece, without reversing the orientations of a collet and sleeve in a chuck device; a method for using the same; and a chuck device to be used in said machining apparatus. The machining apparatus is provided with a deep hole-drilling machine (2) and a chuck device (3). A sleeve (29) and a collet (30) are provided inside the chuck device (3) and the openings of the two respective ends of the collet (30) and the sleeve (29) are open to the outside of the chuck device (3). The opening on one end each of the sleeve (29) and the collet (30) is oriented toward the deep hole-drilling machine (2) and the collet (30) is disposed on the other end side of the sleeve (29).
[Problem] To provide an internal combustion engine component that has both good insulation properties and greater durability than the prior art. [Solution] The present invention relates to a component that forms an internal wall surface of a combustion chamber of an internal combustion engine, the component being characterized in that: (1) the component includes (a) a matrix that includes an iron constituent and (b) an insulating layer formed on the surface of the matrix; (2) the insulating layer includes (b1) an intermediate layer formed on the matrix and (b2) an outer layer formed on the intermediate layer and exposed to the combustion chamber; (3) the intermediate layer is a ferrite-containing layer with essentially no air gaps; and (4) the outer layer is a ferrite-containing layer in which roughly octahedral particles are secured so as to be three-dimensionally continuous while forming air gaps.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
F01L 3/02 - Selecting particular materials for valve members or valve seatsValve members or valve seats composed of two or more materials
F02B 23/02 - Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
F02B 23/06 - Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
F02B 23/08 - Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
[Problem] To strike a balance in the relationship between the component costs of intake and exhaust valves and the downsizing of an engine and the relationship between the cooling performance and the followability of the intake and exhaust valves, and to bring harmony to these conflicting relationships. [Solution] A hollow valve encapsulating a coolant excellent in cooling action is adopted as an exhaust valve 161 exposed to a higher-temperature environment than an intake valve 151 to eliminate an inhibiting factor for downsizing. Meanwhile, a hollow valve not encapsulating a coolant, relatively low in component cost, light in weight, and excellent in followability is adopted as the intake valve 151, which is not required to have as high a cooling action as the exhaust valve 161 and which is required to have higher followability than the exhaust valve 161 in order to improve combustion efficiency.
Provided is a friction welding method capable of appropriately joining one workpiece to another workpiece while ensuring that an appropriate friction process is performed. Frictional heat is generated at a joint interface between a workpiece (W1) and a workpiece (W2) by causing an end surface of the workpiece (W1) and an end surface of the workpiece (W2) to rotate relative to one another while being caused to abut one another in a state in which a pressing force is being applied, immediately after which the relative rotation of the workpieces (W1, W2) is stopped and an upset pressure (P2) is applied to the workpieces (W1, W2). When causing the end surface of the workpiece (W1) and the end surface of the workpiece (W2) to abut one another, a pressing force that does not reach a lower limit value (Pbl) of a bending pressing force whereby the workpiece (W1) causes the workpiece (W2) to bend is used as the pressing force (P), and the frictional heat causes plastic deformation between the end surfaces of the workpieces (W1, W2) as a result of the pressing force (P) and the relative rotation of the workpieces (W1, W2).
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
Provided is a lash adjuster that can automatically adjust a valve clearance. A lash adjuster (20) for adjusting a valve clearance is interposed between an axial end portion of a valve (10) that is biased in a valve-closing direction by a coil spring (14), and a cam (19a) that is a valvetrain structural member. The lash adjuster (20) includes: a plunger (24) upon which the pressing force of the cam (19a) acts as an axial force; a housing (22) that is threadedly engaged with the plunger (24) in the axial direction, and is held so as to be immobilized in the circumferential direction of said threaded engagement portion; and a coil spring (26) that biases the plunger (24) in the reverse direction of the biasing force of the coil spring (14). A flank angle (θ) and a lead angle (α) of the thread ridges of the "threads" of the threaded engagement portion are set to prescribed values. When the threaded engagement portion becomes independent and a lateral force (T) oscillates the plunger (24), which is subjected to axial force, by an amount corresponding to backlash, the threaded engagement portion undergoes sliding rotation so as to move in the axial force direction, whereby an increase/decrease in the valve clearance is automatically adjusted.
Provided is a lash adjuster with a small number of parts. A lash adjuster (20A) adjusts the valve clearance of a valvetrain. The lash adjuster (20A) includes: a cylindrical housing (22) that is inserted into a bore (13); a plunger (24) that is threadedly engaged with the housing (22), and has an upper-end pivot portion (24a) upon which the pressing force of a cam (19a) acts as an axial force via a rocker arm (16); a stopper (30A) that is fixed to the lower end portion of the housing (22); and a coil spring (26) that is interposed between the plunger (24) and the stopper (30A), and biases the plunger (24) in an elongation direction. A protruding portion (33A) on the outer periphery of the stopper (30A) is in axial elastic engagement with a recessed portion (22A) on the inner periphery of the housing (22) such that the stopper (30A) is retained by and fixed to the housing (22), and a stopper lower-end portion (36) projecting below the housing (22) comes into contact with a bore bottom surface (13a) such that the stopper (30A) is prevented from rotating with respect to the bore (13).
Provided are a valvetrain and a mechanical lash adjuster with which it is possible to automatically and reliably adjust a valve clearance. This valvetrain includes: a cam (19a); a valve (10) that is biased in a valve-closing direction by a valve spring (14); a rocker arm (16); and a lash adjuster (20). The lash adjuster (20) includes: a plunger (24) to which the pressing force of the cam (19a) and the biasing force of the valve spring (14) are transmitted via the rocker arm (16); a housing (22) that, on the basis of rotation relative to the plunger (24), forms a threaded engagement portion (30) that contracts the plunger (24), said housing (22) being held so as to be unrotatable in the circumferential direction of the threaded engagement portion (30); and a compression coil spring (26, 26a) that biases the plunger (24) in the elongation direction. The threaded engagement portion (30) is set such that sliding rotation at the threaded engagement portion (30) is suppressed when a load acts on the plunger (24) in either the elongation or contraction direction of the plunger (24), and said suppression of sliding rotation at the threaded engagement portion (30) is relaxed when a lateral load acts on the plunger (24).
The purpose of the present invention is to provide a variable phase device having a short axial length, capable of achieving fine variable phase adjustment, and exhibiting excellent responsiveness. The device is for changing phase between a driving-side outer cylinder section and a driven-side inner cylinder section that are coaxially arranged with each other. The device is a variable phase device that utilizes either: an electromagnetic brake driving system equipped with an intermediate member (30) engaged via helical splines with the inner/outer cylinder sections, a return spring supported on the inner cylinder section in such a manner as to return a rotary drum (44) engaged via a thread with the intermediate member (30) to an initial position thereof, and an electromagnetic clutch (40) for applying a braking force to a rotary drum (44); or a hydraulic driving system equipped with a return spring for returning an integrated vane rotor (210) with the inner cylinder section to an initial position thereof and a pump (P) for supplying a working fluid to hydraulic chambers (116a, 116b) partitioned by the vane rotor (210). The return spring consists of a spiral coil spring in which spiral spring parts (81, 85) are integrated together while being arranged parallel to each other in an axial direction.
F01L 1/34 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening
F01L 1/352 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
F01L 1/356 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate
Provided is a hollow induction motor capable of self-starting using a low level of single-phase alternating current. This hollow single-phase induction motor has a stator that forms magnetic poles using an alternating current power supply and a rotor that rotates on the basis of changes of the magnetic poles. The stator has a case and coils on the inside of the case. The case has a bottom, an annular outer peripheral wall, an annular inner peripheral wall on the inside of the outer peripheral wall, a plurality of first claws formed on the outer peripheral wall, and a plurality of second claws formed on the inner peripheral wall so as to face the first claws. The rotor has: a cylindrical body which is rotatably supported within the case; a flange; a plurality of coil supporting portions which are formed on the outer periphery of the flange and inserted between the first claws and the second claws, at least one of the coil supporting portions being offset circumferentially with respect to the first and second claws; and a plurality of annular rotor coils which are mounted on the coil supporting portions.
Provided are a cutting device and a cutting edge that, when cutting an elongated highly viscous substance, not only are capable of limiting bending of the highly viscous substance using a simple configuration but also limit breakage of the tool edge as much as possible. A pair of cutting edges (20) is provided so as to be capable of moving towards and away from each other, and the respective cutting edges (20) are disposed so that the thickness directions are oriented in the same direction while the respective tool edges (23) face each other. For each cutting edge (20): the thickness thereof becomes thicker from the tip (23a) of the tool edge to the blade root (21); each tool edge (23) is offset with respect to the partner tool edge (23), in the thickness direction of the cutting edges (20), in a range such that the tool edge faces a thickness direction side surface (35a, 35b) of the partner cutting edge (20); and at least the region of the thickness direction side surfaces (35a, 35b) of each cutting edge (20) that faces the partner tool edge (23) is formed of a substance of lower hardness than the partner tool edge (23).
B26D 1/08 - Cutting through work characterised by the nature or movement of the cutting memberApparatus or machines thereforCutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
Provided is a screw machining method which is capable of inhibiting the formation of a protrusion in a screw tread tip portion, even if rolling machining is performed. Cutting machining is used to form a screw thread (2A) on the inner circumferential surface (1a) of a cylindrical body, and rolling machining is used to plastically deform the surface of the screw thread (2A). In the cutting machining, the width (Lt) between both side surfaces (2ATs) of the screw thread tip portion (2AT) is gradually narrowed towards the tip of the screw thread (2A) so as to be narrower than the normal width (Lts), the width (Lm) between both side surfaces (2AMs) in a screw thread main body portion (2AM) is enlarged so as to be greater than the normal width (Lms), and each of the side surfaces (2AMs) of the screw thread main body portion (2AM) is formed so as to protrude further than each of the normal side surfaces (2AMss) by an excess thickness section (4). In the rolling machining, both side surfaces (2AMs) of the screw thread main body portion (2AM) are plastically deformed, and the excess thickness sections (4) are respectively made to plastically flow towards each of the side surfaces (2ATs) of the screw thread tip portion (2AT).
Metallic sodium sealed in an engine valve for use in an internal combustion engine such as an automobile engine preferably has high purity, but little attention has conventionally been paid to organic solvents remaining within micropores in the surface of the metallic sodium. In this method for purifying metallic sodium, metallic sodium (60) containing an organic solvent within micropores in the surface thereof is accommodated in a sealed melting tank (12) and the organic solvent in the metallic sodium is vaporized and removed by heating and decompression.
In this method for filling with metallic sodium, a shaft-side hollow section of an engine valve is filled with a fixed amount of metallic sodium having a uniform structure. Molten metallic sodium is injected into a cylinder (57) having a larger diameter than the inner diameter of a shaft-side hollow section (77) of an engine valve (76), rod-shaped metallic sodium (69) is generated, the shaft-side hollow section (77) of the engine valve (76) is filled with the rod-shaped metallic sodium (69) via a nozzle (78) having a small diameter, and the result is sealed.
Provided is a reduction gear that achieves a desired reduction gear ratio even as the input shaft (42) and the output shaft (43) are formed to be small in the radial direction. A reduction gear (40), in which a reduction gear mechanism (44) for transmitting the rotation of an input shaft (42) to an output shaft (43) is provided in a case (41), is equipped with: an inclined bearing (46), which is provided on the input shaft (42) and is for supporting a swing plate (45) so as to be able to rotate around a second rotation center axis (L2) that is inclined with respect to the first rotation center axis (L1) of the input shaft (42); a base plate (47) that is rotatably disposed on the input shaft (42) and is integrated with the output shaft (43); a bevel gear (48) with teeth number n≥3 that is provided on either the swing plate (45) or the base plate (47); a roller support part (49) that is provided on the other of the swing plate or the base plate and has a maximum of n−1 multiple support grooves, n−1 being a number having no common divisor with n other than 1; and a roller set (50) consisting of a maximum of n−1 multiple rollers that are inserted in respective support grooves, n−1 being a number that is the same or less than the number of multiple support grooves and being a number having no common divisor with n other than 1.
F16H 1/32 - Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
Provided are a cooling method and device for a forging valve that have superior cooling capacity and can greatly reduce cycle time. A forged valve (1) brought in and mounted on a water-cooled, level straight line shaped valve transport path (22A) such that an umbrella front surface (1a1) is in contact with the same is moved smoothly a prescribed distance forward by a valve transport mechanism (20A) while the valve (1) that was previously moved is moved forward smoothly a prescribed distance, thereby intermittently transporting the valve aligned in a row at the prescribed distance while the umbrella front surface (1a1) is kept in a state of contact with the valve transport path (22A) in conjunction with the operation of bringing in the valve (1). The valve is cooled during the above process.
Provided are a method and a device for supplying inert gas into a poppet valve intermediate, in which no matter the size of the poppet valve intermediate, the intermediate can be accurately filled with inert gas without wasting the gas. After bringing an internal space (Win) of a poppet valve intermediate (W) to a negative pressure less than the surrounding ambient pressure (Pa) of the poppet valve intermediate (W) by suction, an inert gas is supplied to the internal space (Win) until the pressure (P) of the internal space (Win) reaches the surrounding ambient pressure (Ps) of the poppet valve intermediate (W).
Provided is a torque transmission device capable of achieving as much compactness as possible in a direction in which a pair of side gears are provided side-by-side while ensuring a differential function and a differential limiting function. The invention is provided with: side gears (5L, 5R) connected to rear wheels (3L, 3R); a case (6) positioned on the outer circumference side of the side gears (5L, 5R), said case (6) rotating around the axis of the side gears (5L, 5R); and a pinion gear (12) rotatably supported by the case (6) and meshing with the side gears (5L, 5R) when straddling both. The side gears (5L, 5R) are configured by spur gears having differing numbers of teeth. The pinion gear (12) is a spur gear and is positioned such that the axial direction of the pinion gear (12) faces in the same direction as the axial direction of the side gears (5L, 5R), and a motor (15) is associated with the pinion gear (12).
F16H 48/24 - Arrangements for suppressing or influencing the differential action, e.g. locking devices using positive clutches or brakes
F16H 48/34 - Arrangements for suppressing or influencing the differential action, e.g. locking devices using externally-actuatable means using electromagnetic or electric actuators
33.
FLAW INSPECTION METHOD AND DEVICE FOR ENGINE VALVE SHAFT CONNECTION PART
A flaw inspection method for an engine valve shaft connection part is provided with a step in which a valve (1) is held so that a valve shaft part end surface (2b) is underwater and directly faces a flaw detection probe (22) disposed so as to face upward in a water tank (21) of an ultrasonic inspection chamber (20) and the inside of a shaft connection part (2a) is searched for flaws, and an inspection step in which the valve (1) is held so that a side surface of the valve shaft part (2) that includes the shaft connection part (2a) is close to and directly faces a flaw detection probe (32) disposed sideways in an eddy current inspection chamber (30) adjacent to the inspection chamber (20), the probe (22) and valve (1) are made to rotate in relation to each other, and the surface of the shaft connection part (2a) is searched for flaws. Valves (1) are simultaneously transferred from a loading position, to the ultrasound inspection chamber, to the eddy current inspection chamber, and to an unloading position. Thus, equipment is made to be more compact and an inspection cycle time is reduced.
G01N 27/90 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
G01N 29/27 - Arrangements for orientation or scanning by moving the material relative to a stationary sensor
In a lash adjuster used for a valve operating mechanism of an internal combustion engine, there is known a lash adjuster constituted by inserting a cylindrical sleeve into a plunger cap for preventing air from entering a high-pressure chamber located at a lower portion of the lash adjuster. However, in the conventional lash adjuster, since the plunger cap is formed with two side holes which are different in height in the axial direction of the plunger cap, it becomes complicated to regulate the side surface the plunger cap which corresponds to a sliding surface. Therefore, it is problems to be solved by the present invention to provide a lash adjuster in which the side surface of the plunger cap can be easily regulated without disturbing the inflow and outflow of oil and whose machining cost can be kept low.
c are provided and all of them are disposed in a plane perpendicular to a shaft center of the body 21.
The present invention makes it possible to suppress variations in the weight of a high viscosity substance at each extrusion of the high viscosity substance and each cut-off to the extent possible. Metallic sodium (5) filled into an extruder main body (3) is extruded from a nozzle (7) of the extruder main body (3) by a pressing tool (4), and when extrusion of the metallic sodium (5) to a prescribed position is detected, movement of the pressing tool (4) is stopped and then the extruded metallic sodium (5) is cut. In this instance, the impulse (P) after stopping until the load ceases to act on the metallic sodium (5) within the extruder main body (3) after the movement of the pressing tool (4) has stopped is made to approach a constant value by adjusting the speed of movement of the pressing tool (4).
B21C 31/00 - Control devices for metal extruding, e.g. for regulating the pressing speed or temperature of metalMeasuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
F01L 3/24 - Safety means or accessories, not provided for in preceding subgroups of this group
36.
INTERNAL COMBUSTION ENGINE COMPONENT AND PRODUCTION METHOD THEREFOR
[Problem] To provide an internal combustion engine component having a combination of good heat insulating properties and higher durability than the prior art. [Solution] The present invention relates to an internal combustion engine component that constitutes an inner wall surface of a combustion chamber of an internal combustion engine. The internal combustion engine component is characterized in that (1) the component has a porous layer formed over at least the surface exposed to the combustion chamber, and (2) the porous layer is a layer formed of three-dimensionally interconnected particles of a ferrite which is a spinel-type iron oxide.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
C23C 18/12 - Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coatingContact plating by thermal decomposition characterised by the deposition of inorganic material other than metallic material
F01L 3/02 - Selecting particular materials for valve members or valve seatsValve members or valve seats composed of two or more materials
A valve lifter with a variable lift mechanism is required to be deployed at a predetermined angle with respect to a cam unit, and the present invention is intended to achieve this requirement with a simple configuration without too much processing such as a fitting of the conventional longitudinal groove and a pin.
A cam sliding contact surface of a valve lifter on which a high lift cam and a low lift cam slides is formed to be a smooth inclined surface and a cam slide starting point is lower than a cam slide terminating point, thereby establishing an elevation difference between the cam slide starting point and the cam slide terminating point. As a result, since the high lift cam and the low lift cam always move uphill on the cam sliding contact surface, namely, from the low cam slide starting point toward the high cam terminating point along the slope of the cam sliding contact surface, the valve lifter is not subjected to a force around the reciprocating axis from the cam and therefore, the direction of the valve lifter is maintained constant.
Provided is a variable phase device which is for an automobile engine and has a self-locking mechanism that does not reduce the durability of structural components. This variable phase device 1 for an engine has: a control rotating body 3 to which torque is applied by a torque application mechanism 9; a drive rotating body 2 capable of rotating relative to a camshaft 7; and a self-locking mechanism 11 that renders the camshaft 7 incapable of relative rotation by means of cam torque. The variable phase device is provided with a reduction gear mechanism 10 having a reduction ratio exceeding 1, and equipped with: an eccentric circular cam 18 of the control rotating body 3; a first gear 12 of the camshaft 7; a second gear 13 of the drive rotating body 2; and an intermediate gear member 17 retained on the eccentric circular cam 18 and having a third gear 14 and a fourth gear 15 engaging the first gear 12 and the second gear 13. The self-locking mechanism 11 is equipped with a circular hole 3c of the control rotating body 3, which holds the eccentric circular cam in eccentric rotation, and a cylindrical part 19 of the intermediate gear member 17.
F01L 1/352 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
F01L 1/356 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate
39.
MECHANICAL LASH ADJUSTER AND METHOD FOR MANUFACTURING MECHANICAL LASH ADJUSTER
The invention relates to assembly automation, and the objective of the invention is to assemble a plunger and a body as accurately and quickly as possible. An outer circumferential surface of a plunger (14) is screwed together with an inner circumferential surface of a cylindrical body (13), and a plunger spring (32) is interposed between the body (13) and the plunger (14). A rotation suppression jig (33) used during assembly is provided with a plurality of upright plate portions (34), and a plurality of engagement grooves (16) which engage with the plurality of upright plate portions (34) are correspondingly formed on another end surface (13b) of the body. A pair of holding surfaces (25A) forming flat surfaces are formed on a plunger tip portion (25) so as to face each other in a radial direction of the plunger (14).
The purpose of the present invention is to suppress the inflow of air to a high pressure chamber while reducing the number of components. A plunger (14) is slidably engaged into a body (13). A reservoir (24) is formed in the plunger (14) and a communication hole (25) that enables communication between the interior and the exterior is formed in a head portion (19) of the plunger. A high pressure chamber (28) is formed inside the body (13) between the body and a plunger bottom (20), and an oil supply hole (40) is formed in a plunger peripheral wall (21). A return spring (41) is interposed between the body (13) and the plunger (14), and a valve mechanism (42) is provided on the plunger bottom (20). The reservoir (24) is set such that the space therein is continuous, and the oil supply hole (40) is oriented towards the outside of an axis line (O) of the plunger (14) in the radial direction.
The present invention suppresses air from flowing into a high pressure chamber while reducing the number of parts. A plunger (14) is slidably fitted into a body (13). A reservoir (24) is formed in the plunger (14), and a communication hole (25) that establishes communication between the inside and outside is formed in a head part (19) of the plunger (14). A high pressure chamber (28) is formed in the body (13) between a plunger bottom part (20) and a portion of the body, and an oil supply hole (40) is formed in a plunger circumferential wall part (21). A return spring (41) is interposed between the body (13) and the plunger (14), and a valve mechanism (42) is provided on the plunger bottom part (20). In an inner circumferential surface of the plunger (14), an inclined surface part (51b), which is a portion with which a jet (ji) of oil that is jetted from the oil supply hole (40) collides, is inclined so as to slope toward an oil jetting direction as the inclined surface part approaches the plunger head part (19).
[Problem] To make the face surface of a poppet valve more uniform in rigidity and strength, the poppet valve being manufactured by forging. [Solution] Provided is a method for manufacturing a poppet valve 10 by forging, the poppet valve 10 being provided with an umbrella section 14 located at one longitudinal end of a shaft section 12 and having a face surface N. In the intermediate umbrella section 14' of a partially finished poppet valve 10', when the face surface N of the umbrella section 14 after forging is used as a reference, a bulge 15 having a crest 15a positioned in the direction of a line K2 normal to the face surface N is provided in a region which is to be the face surface N after forging. In a cross-sectional view, the crest 15a of the bulge 15 is located on the normal line K2 passing through a reference point P3 set on an imaginary line (line K) which connects a base point P1 on the inner diameter side of the face surface N and a base point P2 on the outer diameter side, and when viewed along the center axis X1 of the shaft section 12, the position of the reference point P3 is set so that the relationship between the length L1 from the base point P1 on the inner diameter side to the reference point P3 and the length L2 from the base point P2 on the outer diameter side to the reference point P3 satisfy the relationship of L1/L2 ≤0.5.
B21K 1/24 - Making machine elements valve parts valve bodiesMaking machine elements valve parts valve seats
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
C22F 1/10 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
F01L 3/20 - Shapes or constructions of valve members, not provided for in preceding subgroups of this group
A hollow poppet valve (10) having an improved heat transfer capability is provided. The valve has an internal cavity (S), extending from within a valve head (14) into a stem (12) of the valve, is loaded with a coolant (19) together with an inert gas. The coolant in the valve head (14) is stirred by swirl flows of the coolant generated during reciprocal motions of the valve. A multiplicity of swirl-forming protrusions are formed on at least on one of the bottom and the ceiling of the valve head cavity (S1) in such a way that swirl flows (F20, F30) of coolant are generated by the protrusions in the valve head cavity (S1) during reciprocal motions of the valve to thereby stir the coolant in the circumferential direction of the cavity (S1).
Provided is a gearbox which includes a stopper for keeping a driving gear non-rotatable even when the driving gear receives torque from a gear coupled to an output shaft. The gearbox is provided with: a first gear; a second gear coupled to an output shaft; one or more driving gears which allow a third gear mated with the first gear and a fourth gear mated with the second gear to be coaxially integrated with each other in a longitudinal direction; and a driving rotational mechanism for rotating the driving gears by an input shaft, wherein all the first to fourth gears are helical gears; the tooth orientation in which the tooth trace of the third gear is tilted relative to the center axis of rotation is opposite to the tooth orientation in which the tooth trace of the fourth gear is tilted; the first gear and the second gear are retained by a thrust bearing; and a stopper for keeping the driving gears incapable of being displaced in contact therewith, the driving gears receiving torque from one of the first gear or the second gear, is provided either in front of or behind at least some of the driving gears so as to be adjacent thereto.
F16H 1/32 - Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
A hollow poppet valve (10) has an internal cavity (S) which comprises a diametrically large valve head cavity (S1) formed in a valve head (14) and a diametrically small stem cavity (S2) formed in a stem (12) in communication with the valve head cavity (S1). The stem cavity has a diametrically larger first portion (S21) near the end of the stem and a diametrically smaller second portion (S22) near the valve head. A step (17) is formed at the boundary of the first and the second portion of the stem cavity (S2). The internal cavity is loaded with a coolant to a level above the step, together with an inert gas. In response to a reciprocal motion of the valve, turbulent flows of coolant (F9) are created in the neighborhood of the step (17), facilitating active stirring of the coolant (19) in the cavity (S).
F16K 1/32 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces Details
F16K 49/00 - Means in or on valves for heating or cooling
Provided is a hollow poppet valve having improved heat conductivity. A hollow poppet valve (10) has an umbrella section (14) formed integrally at a shaft end of the valve. A hollow section (S) is formed in the valve so as to extend from the umbrella section (14) to a shaft section (12) and is filled with a cooling material (19). A rectilinear small-diameter hollow section (S2) within the shaft section (12) communicates with a circular truncated cone-shaped large-diameter hollow section (S1) through a medium-diameter hollow section (S3) provided at a position corresponding to a fillet section (13), the large-diameter hollow section (S1) being located within the umbrella section (14). The opening peripheral edge (14b1) of the medium-diameter hollow section (S3), the opening peripheral edge (14b1) facing the large-diameter hollow section (S1), and the opening peripheral edge (20) of the small-diameter hollow section (S2), the opening peripheral edge (20) facing the medium-diameter hollow section (S3), are respectively constituted by planes perpendicular to the center axis (L) of the valve. When the valve (10) reciprocates axially, a vertically inward circulation flow (T1) is formed in the hollow section (S1), and a vertical circulation flow (T2) is formed in the hollow section (S3). Consequently, the cooling material (19) is positively stirred to enhance the heat conductivity of the valve (10).
The present invention removes burrs without increasing the length of the processing line between the cutting device and the polishing device and prevents abnormal wear of the grindstone due to burr removal in the polishing device. A pair of gripping members (60) for gripping a workpiece shaft (W1) and a burr removal tool (35) for removing burrs from the workpiece shaft (W1) gripped by said pair of gripping members (60) are disposed below a pair of guide rails (17). The burr removal tool (35) has a depression (42) such that the opening of said depression (42) faces the end face of the other end of the shaft (W1) of the workpiece (W) and is configured to rotate centered on the shaft center of the depression (42) while being displaceable in the direction in which the depression (42) shaft center extends. Moreover, the inner circumferential surface (42a) of the depression is formed so that the diameter decreases from the open end of the depression (42) toward the inside of the depression (42) and a cutting edge (46a) is provided on the inner circumferential surface (42a) of the depression.
Provided is a poppet valve which is configured so as to prevent all the three modes of heat transfer from occurring, thereby enabling maximum combustion efficiency to be achieved. A poppet valve has an umbrella section (14) integrally formed on one end side of a shaft section (12). A hollow section (19) extending along an umbrella front surface (24) is formed within the umbrella section (14). A metallic layer (17) for blocking radiation heat is formed on the ceiling surface (25) of the hollow section (19), and a heat insulating section is formed between the metallic layer (17) and the bottom surface of the hollow section (19). Among the modes of heat transfer, the conduction and convention are blocked by the heat insulating section, and the radiation is blocked by the metallic layer (17).
The relative value of a thermal insulation effect and a heat drawing effect are adjusted and maximum combustion efficiency achieved by using a poppet valve using a refrigerant. A heat-insulation space (S1) separated by a partition wall (15) and a cooling section (S2) having a cooling material (19) filled therein are formed from inside the head section (14) of the hollow poppet valve (10) across to a shaft section (12). A suitable thermal insulation effect and a suitable heat drawing effect can be obtained by appropriately setting the installation position and vertical length of the partition wall (15) in accordance with the vehicle, etc., in which the poppet valve is used. In addition, the mechanical or thermal strength of the poppet valve having the heat-insulation space (S1) and a cooling section (S2) formed therein is improved as a result of said partition wall (15).
In a lash adjuster used for a valve train for internal combustion engines, a method for fitting a cylindrical sleeve into a plunger cap is disclosed as a configuration for preventing the mixing of air into a high-pressure chamber located in a lower portion thereof. However, in conventional lash adjusters, the plunger cap is provided with two side holes having a difference in axial height, and therefore the management of side surfaces as sliding surfaces has become complicated. Accordingly, the problem to be resolved by the present invention is to provide a lash adjuster which facilitates the management of the side surfaces and further reduces processing costs without interfering with the inflow/outflow of oil. The above-described problem has been addressed by a hydraulic lash adjuster which is characterized in that two or more cap side holes (27c) are provided, all these cap side holes (27c) being arranged in a plane perpendicular to the axis of a body (21).
Using an assembly of a hollow poppet valve in which an umbrella part is integrally formed on a shaft end part, the hollow poppet valve having a hollow part spanning from the umbrella part to a shaft part, the hollow part being filled with an inert gas and a cooling material, and an iron-based sintered alloy valve seat obtained by integrating two layers, specifically a support-member-side layer and a valve-contact-surface-side layer, a valve seat is obtained in which the hollow poppet valve is made of a material having a thermal conductance of 5-45 (W/m•K) at 20-1000°C, the valve seat comprising a support-member-side layer having a thermal conductance of 23-50 (W/m•K) at 20-300°C, and a valve-contact-surface-side layer having a thermal conductance of 10-22 (W/m•K). The valve temperature can thereby be reduced significantly more than with an assembly of a conventional solid valve-valve seat, throughout the entire range of engine speeds of an automobile.
F01L 3/14 - Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
B22F 5/00 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
B22F 7/06 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite workpieces or articles from parts, e.g. to form tipped tools
Provided is a method for manufacturing a hollow poppet valve for which a large amount of a cooling material can be filled into a hollow part. This method for manufacturing a hollow poppet valve, wherein a cooling material (19) is filled into a hollow part extending from an umbrella part (14) to a shaft (12), is equipped with: a rod insertion step, in which a clay-like cooling material (19) extruded from an extruder (20) is cut to a prescribed length by a cutter (20) to form a cooling material rod (19a), which is inserted into the hollow part (S) from the opening of a hole in an intermediate valve product (11) and corresponding to the hollow part (S); and a sealing step, in which the opening of the hole (S) is sealed. In the rod insertion step the insertion of cooling material rods (19a, 19b) into the hole (S) is performed multiple times. A shorter length for the cooling material rod (19a) results in less deformation and bending, so there is little interference between the rod and the inner circumferential surface of the hole (S); therefore, the diameter of the rod can be increased and the filling amount of the cooling material (19) can be increased.
[Problem] A means is disclosed for converting vibration energy or the like of a traveling vehicle body to electric energy and improving fuel consumption of a vehicle, but this means cannot recover energy while an internal combustion engine is idling, and the means is insufficient as an energy recovering means. Therefore, the problem to be addressed by the present invention is to provide an internal combustion engine provided with a power-generating member that can efficiently convert vibration energy of a vehicle body to electric energy, even when the internal combustion engine is idling, and that can minimize the space for circuit configuration components such as piezoelectric elements and rectifiers. [Solution] The problem described above is addressed by an internal combustion engine of a traveling vehicle, the internal combustion engine with a power-generating member being characterized in that a power-generating member is provided to a receiving member for receiving the action of an operating member constituting the internal combustion engine, the power-generating member generates power through the action of the operating member, and the generated power is stored in a power storage device of the traveling vehicle.
F03G 7/08 - Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching, or like movements, e.g. from the vibrations of a machine
F01L 1/04 - Valve drive by means of cams, camshafts, cam discs, eccentrics, or the like
F01L 1/46 - Component parts, details, or accessories, not provided for in preceding subgroups
F01L 3/02 - Selecting particular materials for valve members or valve seatsValve members or valve seats composed of two or more materials
[Problem] To provide an internal combustion engine provided with a power-generating member that can, even while the internal combustion engine is idling, efficiently convert the vibration energy thereof to electric energy, and that can minimize the space of circuit configuration components such as piezoelectric elements and rectifiers. [Solution] In an internal combustion engine (11) of a traveling vehicle, a power-generating member (52) is provided to a securing bolt (26) of a camshaft support member (25) which bears the action of a camshaft (20) and supports the camshaft (20), and a power storage device (152) is provided for storing the power generated by the power-generating member (52) through the action of the camshaft (20).
F03G 7/08 - Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching, or like movements, e.g. from the vibrations of a machine
F01L 1/04 - Valve drive by means of cams, camshafts, cam discs, eccentrics, or the like
55.
ENGINE VALVE AND METHOD FOR MANUFACTURING ENGINE VALVE
The purpose of the present invention is to provide: an engine valve configured so that, even if an umbrella cover is mounted by staking, a crack due to plastic deformation does not occur in the valve body; and a method for manufacturing the engine valve. An engine valve (1) is provided with: a valve body (2) having an umbrella section (5) formed integrally at the front end of a shaft section (4) and having a gradually increasing diameter; and an umbrella cover (3) mounted to the valve body (2) so as to form a gap (12) between the umbrella cover (3) and the umbrella section (5) and so as to cover the outer peripheral side surface of the umbrella section (5), the umbrella cover (3) being mounted to the valve body (2) by staking. One or more recesses (8) are circumferentially provided in the outer periphery of the valve body (2). Sections (11) to be staked are staked into the recesses (8) of the valve body (2) to mount the umbrella cover (3) to the valve body (2), the staking being made so that gaps (14) are formed between the staked sections (11), which have been formed on the umbrella cover (3) by the staking, and the recesses (8) of the valve body (2).
The purpose of the present invention is to provide a mechanical lash adjuster in which a retention mechanism for retaining a plunger in a housing is inexpensive. A lash adjuster (1) is provided with: a housing (3) having a closed-end cylindrical shape; a plunger (2) held within the housing (3) while the outer peripheral surface (9) of the plunger inscribes the inner peripheral surface (10) of the housing (3); and a retention mechanism (14) for preventing the plunger (2) from coming out of the housing. The retention mechanism (14) is provided with: a first groove (11) formed in the inner peripheral surface (10) of the housing (3) so as to extend in the circumferential direction of the inner peripheral surface (10); a second groove (12) formed in the outer peripheral surface (9) of the plunger (2) so as to extend in the circumferential direction of the outer peripheral surface (9) and so as to be located facing the first groove (11); and a flexible wire material (4) inserted into both the first groove (11) and the second groove (12).
Provided is a hollow poppet valve configured so that a swirl which is formed in a cooling material in a large-diameter hollow section within a valve umbrella section as the valve opens and closes stirs the cooling material within the hollow section, thereby increasing the thermal conductivity of the valve. A hollow poppet valve (10) has an umbrella section (14) which is formed integrally with an end of the shaft of the poppet valve (10). A hollow section (S) is formed in the poppet valve (10) so as to extend from the umbrella section (14) to the shaft (12), and a cooling material (19) is filled, together with an inert gas, into the hollow section (S). A protrusion (20, 30) for forming a swirl is provided on the bottom surface or the ceiling surface of a large-diameter hollow section (S1) within the umbrella section (14). The opening and closing of the valve (10) forms a swirl (F20, F30) in the cooling material (19) within the hollow section (S1) and circumferentially stirs the cooling material (19) within the hollow section (S1), thereby increasing the thermal conductivity of the valve (10).
[Problem] To provide a clutch that prevents clutch brake dampening, a punch for forming clutches, and technology for a manufacturing method for clutches. [Solution] A clutch having: an annular metal supporting part having a bottom, an inner circumferential wall perpendicular to the bottom, an outer circumferential wall perpendicular to the bottom and disposed on the outer side in the radial direction of the inner circumferential wall so as to have the same axis as the inner circumferential wall; an annular friction plate that is engaged between the inner circumferential wall and the outer circumferential wall and is supported on the bottom; and a crimping structure that anchors the friction plate to the metal supporting part by way of a plurality of first crimping portions that are provided in locations spaced substantially equally along the circumferential direction of the inner circumferential wall and hold the friction plate to the bottom, and a plurality of second crimping portions that are provided in locations spaced substantially equally along the circumferential direction of the outer circumferential wall and hold the friction plate to the bottom. The plurality of second crimping portions are formed in locations that do not overlap with the plurality of first crimping portions in the radial direction of the metal supporting part.
F16D 27/112 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings with axially movable clutching members with flat friction surfaces, e.g. discs
[Problem] To provide a method of transferring rods whereby one end of a rod, as a workpiece, can be accurately inserted into a prescribed positioning hole even when the length of the rod is short. [Solution] In this method: a chuck device (64A (64B)) of a robot hand (62c) is used when receiving a primary formed workpiece (W1) from an electrode chuck (22); after the primary formed workpiece (W1) is received and before inserting a shaft (W11) of the primary formed workpiece (W1) into an insertion hole (12) on a forging press body (10), a holding portion (W11a), on the primary formed workpiece (W1), that is held by the electrode chuck (22) is grasped with a chuck device (65A (65B)) that is not the chuck device (64A (64B)); and the grasp of the chuck device (64A (64B)) on the primary formed workpiece (W1) is released. Thus, the holding portion (W11a) that is held by the electrode chuck (22) on the shaft (W11) side of the primary formed workpiece (W1) can be inserted into the insertion hole (12).
The purpose of this invention is to improve the heat dissipation effect of a hollow poppet valve by separating, with a partition, a small diameter hollow portion in a valve shaft and a large diameter hollow portion in a valve head. A conical large diameter hollow portion (S1) in a head (14) of a hollow poppet valve and a small diameter hollow portion (S2) in a shaft (12) are separated by a partition, and both hollow portions (S1, S2) are each charged with an inert gas and a cooling material (19). The heat dissipation effect in the head (14) is increased by smoothly forming a powerful tumble flow by using the inertial force applied to the cooling material (19) in the hollow portion (S1), when opening and closing the valve (10), only for forming the tumble flow. The partition (15) compensates for a reduction in the bending and torsion strength of the valve shaft (12).
A hollow poppet valve exhibits improved thermal conductivity obtained by extending a small-diameter hollow section, which is formed within a valve shaft, to the bottom surface of a large-diameter hollow section, which is formed within a valve umbrella section. A hollow poppet valve (10) is configured in such a manner that a truncated circular conical large-diameter hollow section (S1), formed within an umbrella section (14), connects to a small-diameter hollow section (S2), which is formed within a shaft section (12). A pipe-like partition wall (15), which extends the hollow section (S2) to the bottom surface (the reverse side of a cap (18)) of the hollow section (S1), is provided within the hollow section (S1), and the hollow sections (S1, S2) are separated from each other. The hollow sections (S1, S2) are filled with inert gas and a cooling material (19), respectively. Inertia force which acts on the cooling material (19) in the hollow section (S1) during the opening and closing operation of the valve (10) is utilized only to form a tumble flow, and a powerful tumble flow is formed smoothly. Part of the heat of a valve umbrella surface (18a) is directly transferred to the shaft section (12) through the cooling material (19) within the hollow section (S2), enhancing the thermal conductivity of the valve (10).
The present invention improves the heat dissipation effect of a hollow poppet valve by providing a vertical rib to the inner peripheral surface of a recessed section of a head section outer shell, and by promoting the occurrence of the upward flow of a coolant along the outer peripheral surface of a large diameter hollow section so as to facilitate the formation of a tumble flow that turns inward in the vertical direction. In this hollow poppet valve (10), a hollow section (S) is formed from a head section (14) to a shaft section (12), the head section (14) being integrally formed at the end section of the poppet valve, and the hollow section (S) is filled with an inert gas and a coolant (19). A vertical rib (21) is provided to an inner peripheral surface (14b2) of a recessed section (14b) of a head section outer shell (14a) which defines a disc-shaped large diameter hollow section (S1) inside the valve head section (14). When the valve (10) reciprocates, the upward flow of the coolant (19) along the outer peripheral surface of the large diameter hollow section (S1) occurs more readily, the coolant (19) inside the large diameter hollow section (S1) reliably forms a tumble flow that turns inward, and the heat dissipation effect is increased.
[Problem] To provide: a diamond-like carbon (DLC) coating film which can ensure both a high deposition rate of a chemical vapor deposition (CVD) method and high durability of a sputtering method; and a coated valve lifter. [Solution] This DLC coating film is composed of an intermediate layer (3) deposited on the surface of a substrate and a DLC layer (4) deposited on the intermediate layer (3), wherein: the intermediate layer (3) is formed of a metal carbide or metal capable of surface hardening; and the DLC layer (4) is formed with a metallic element added while introducing an inert gas which contains a hydrocarbon gas, said metallic element being common to the intermediate layer (3) and the DLC layer (4). Thus, the intermediate layer (3) and the DLC layer (4) can be formed by continuous sputtering treatment, while the hydrogen (H) content of the DLC layer (4) formed of a metal-containing DLC (Me-DLC) can be controlled.
Provided is a hollow poppet valve for which the heat-drawing effect is improved by providing a stepped part for generating turbulent flow at a prescribed location of a small-diameter hollow part (S2) of the valve shaft part in the axial direction. This hollow poppet valve (10) has an umbrella part (14) integrally formed on one end of a shaft part of the poppet valve, with a hollow part (S) being formed from the umbrella part (14) to the shaft part (12) of the poppet valve, and the hollow part (S) being filled with a cooling material (19). The small-diameter hollow part (S2) within the shaft part (12) communicates with a large-diameter hollow part (S1) inside the umbrella part (14), and the inner diameter of a hollow part (S21) of the small-diameter hollow part, which is closer to the shaft end, is greater than that of a hollow part (S22), which is closer to the umbrella part, thereby providing a stepped part (17) in the small-diameter hollow part (S2), and the coolant material (19) fills the interior past the stepped part (17). When the coolant material (19) moves inside the small-diameter hollow part (S2) in conjunction with the up/down operation of the valve (10), a turbulent flow is generated near the stepped part (17), thereby promoting the stirring of the coolant material (19).
Some phase varying devices are provided with a self-locking mechanism that locks a follower rotating body so as not to be rotatable relative to a driver rotating body when cam torque, which is input from the engine valve side, is generated. Conventional self-locking mechanisms have a problem in which a lock plate easily penetrating like a wedge due to an imbalance in self-locking power, thereby hindering the release of the self-locking mechanism. The problem is resolved by a phase varying device with a self-locking mechanism characterized in that one of first lock plates (14a … ) that receive cam torque in the advance direction and one of second lock plates (14b … ) that receive cam torque in the retard direction are disposed so as to overlap a follower rotating body (3) in the axial direction.
F01L 1/34 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening
F01L 1/352 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
[Problem] To provide workpiece inspection equipment capable of increasing inspection items without expanding the installation space for all of the inspection equipment by way of disposing a plurality of inspection stages around a rotating table for workpiece transport. [Solution] Workpiece inspection equipment (20) comprises a rotating table (21) for workpiece transport that rotates intermittently and on which a plurality of workpiece containers (22) are provided so as to be spaced evenly in the circumferential direction, a workpiece loading stage (S0) and a workpiece discharging stage (S6) provided on the rotating table (21) at prescribed locations separated in the circumferential direction, and a plurality of inspection stages (S1 - S5) provided at prescribed locations in the circumferential direction of the rotating table between the loading and discharging stages (S0, S6), wherein the number of inspection stages can be increased by increasing the number of workpiece containers (22) provided on the rotating table without expanding the diameter of the rotating table (21).
G01B 21/00 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
B65G 47/84 - Star-shaped wheels or devices having endless travelling belts or chains, the wheels or devices being equipped with article-engaging elements
F01L 3/24 - Safety means or accessories, not provided for in preceding subgroups of this group
67.
PHASE SHIFTING DEVICE FOR AUTOMOTIVE-VEHICLE ENGINE
[Problem] To provide a phase shifting device for an automotive-vehicle engine that prevents rattling between a lock plate and a camshaft, and that can change quickly a relative phase angle of the camshaft in relation to a drive rotation body. [Solution] A phase shifting device for an automotive-vehicle engine, in which a holding part of a camshaft has a self-locking mechanism that presses a lock plate to a cylindrical portion of a drive rotation body using cam torque, a rotation-operation-force-imparting means transmitting torque to the camshaft via a control rotation body, a plurality of transmitting members, the lock plate, and the holding part, and changing the relative phase angle of the camshaft with respect to the drive rotation body, wherein the holding part has a polygonal column shape, the lock plate has a first member supported on one surface of the holding part, a second member supported on a surface adjacent to the one surface, and a compression spring; the plurality of transmitting members being respectively disposed between a plurality of the lock plates with a small gap therebetween.
F01L 1/34 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening
68.
METHOD AND DEVICE FOR CONTROLLING VARIABLE PHASE DEVICE
[Problem] In the controlling of the opening/closing timing for a valve by means of an ECU, depending on the engine rotational frequency the responsiveness of a variable phase device may be lowered and suitable control may not be possible, making it impossible to obtain the desired engine performance. Accordingly, the present invention addresses the problem of providing a method and a device for controlling a variable phase device with which the variable phase device achieves adequate responsiveness even in a low-rotation region. [Solution] A phase control method for a variable phase device whereby: on the basis of the relative angle in the current step (calculated from the rotational speed values for various shafts) and a command value for an electromagnetic clutch in the current step, a kalman filter is used to calculate an estimated value for the relative angle one step later; this estimated value is input as a feedback signal to a sliding mode controller; and, on the basis of the value of this feedback signal, the command value for one step later is calculated and is output to the electromagnetic clutch.
F02D 45/00 - Electrical control not provided for in groups
F01L 1/356 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate
F02D 13/02 - Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
G05B 13/00 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
Provided is an engine valve which, in order to respond to the increasing severity of the usage environment without requiring a complicated structure, can ensure the required durability by means of a generic cobalt base build-up metal and a simple treatment step. This engine valve is formed from an engine valve valve base comprising a shaft part and a cap part that is at one end of the shaft part. A ring-shaped cladding section (13) is provided, by means of build-up welding, on the cap part, and a face (F) is provided which forms a surface hardening layer on the cladding section (13). The build-up metal of the cladding section (13) is formed from a Co base abrasion proof alloy, and the surface hardening layer is an oxide film having a dispersed nitride layer that is nitride formed in accordance with the distribution of iron scattered on a finished surface, by means of a nitriding treatment of the entire valve base after forming the finished surface on the cladding section (13).
Provided is an engine valve in which the component ratio of specific rare metals in the build-up metal of a face can be suppressed, and specific properties in terms of abrasion resistance, impact resistance and high-temperature corrosion resistance can all be met, in order to respond to the increasing severity of the usage environment. An engine valve wherein: a ring-shaped cladding section is provided, by means of build-up welding, on the cap part of a valve base, and a face is provided which forms a surface hardening layer on the cladding section; the build-up metal of the cladding section is formed from a Ni-Fe-Cr alloy; the component mass of the included elements is 8.0-40% W, 20.0-40.0% for the total of Mo and W, 20.0-50.0% Fe, 12.0-36.0% Cr, 1.0-2.5% B, with the remainder being Ni and unavoidable impurities; and the surface hardening layer forms a nitride layer, by means of nitriding treatment of the entire valve, on a finished surface formed on the face. Thus, the composition component ratio of rare metals can be suppressed, and it is possible to ensure specific properties.
Provided are: a surface-coating material having excellent cracking resistance and peeling resistance and also having excellent high-temperature corrosion resistance properties; and a poppet valve coated with the surface-coating material. A Ni-Cr-Co-based alloy according to the present invention comprises 40.0 to 50.0 mass% of Cr, 10.0 to 20.0 mass% of Co, 0.5 to 5.0 mass% of Nb, 0.01 to 5.0 mass% of Fe and 0.1 to 3.0 mass% of Si, with the remainder being 26.0 to 40.0 mass% of Ni and unavoidable impurities. The Ni-Cr-Co-based alloy may additionally comprise an element or elements respectively selected from Mo, W, Mn, Ti, Al, B and C in the total amount of 5.0 mass% or less, wherein the content of each of Ti and Al is 3.0 mass% or less and the content of each of B and C is 1.0 mass% or less. In the poppet valve according to the present invention, at least the front surface of a head part is coated with the Ni-Cr-Co-based alloy.
Provided is an automotive engine phase-adjusting device including a self-lock mechanism that does not inhibit an operation of modifying the relative phase angle of a cam shaft with respect to a drive rotating body. The automotive engine phase-adjusting device includes: a drive rotating body having a cylinder portion and driven by a crank shaft; a cam shaft supporting the drive rotating body coaxially and relatively rotatably; a mechanism for modifying the relative phase angle; and a self-lock mechanism for preventing the shifting of the relative phase angle due to cam torque by pressing a lock plate held by a holder portion integral with the cam shaft onto an inner peripheral surface of the cylinder portion. The automotive engine phase-adjusting device is provided with plate pressing surfaces disposed at a plurality of substantially equally divided locations along the circumference on the outer periphery of the holder portion, and a plurality of equally divided lock plates corresponding to the plate pressing surfaces. The plate pressing surfaces are formed by first and second pressing surfaces that respectively transmit the cam torque in advancing and retarding directions to the lock plates.
F01L 1/34 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening
F01L 1/356 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate
Provided is a hollow poppet valve that can improve the heat dissipation effect. A hollow poppet valve (10), in which a hollow section (S) is formed between a valve head (14) of a poppet valve, in which the valve head (14) is integrally formed with a shaft end, and a shaft (12), and in which the hollow section (S) is filled with an inert gas and a coolant (19), improves the heat dissipation effect by a substantially disc-shaped, large-diameter hollow section (S1) provided in the valve head (14) being connected to a linear small-diameter hollow section (S2) provided in the valve shaft (12) so as to be substantially orthogonal, and by a circulating flow (convection flow), that turns inward in the vertical direction around the central shaft line (L) of the valve, being formed in the coolant (19) in at least the large-diameter hollow section (S1) of the valve (10), that moves reciprocatingly in the axial direction.
The heat drawing effect of a hollow valve can be improved without reducing the durability thereof, by expanding the diameter of the bottom surface-side outer perimeter section of a large-diameter hollow section inside the valve head section, and by bringing same closer to a valve face section. The hollow poppet valve (10) has a hollow section (S) formed from the head section (14) to a shaft section (12) of the poppet valve, said poppet valve having the head section (14) formed integrally on the end section thereof; and has a coolant material (19) together with an inert gas filled into the hollow section (S). The bottom surface-side outer perimeter section (S1a) of the large-diameter hollow section (S1) inside the head section (14) has the diameter thereof expanded in a flange shape towards the outside in the radial direction. The amount of coolant material (19) inside the hollow section (S1) is increased, the distance between the coolant material (19) and a valve face section is decreased, and the heat drawing effect of the valve head section (14) is increased. The bottom surface-side outer perimeter section (S1a) of the hollow section (S1) having the diameter thereof expanded is a flange shape, the entire valve head section (14) does not become thin, and there is no effect on the durability of the valve (10).
Provided is a hollow poppet valve having an excellent heat drawing effect and for which production equipment can be simplified. A hollow section (S) is formed from a head section (14) of the poppet valve, which has the head section (14) integrally formed on one end side of a shaft section (12) thereof, to the shaft section (12); and a Zn-Al alloy is filled into the hollow section (S) instead of conventional metallic Na, as a coolant (19). The Zn-Al alloy and metallic Na have substantially the same thermal conductivity, therefore the same as a conventional heat drawing effect can be obtained. The coolant (19) is not easily oxidized and can be stored and filled under atmospheric conditions, therefore the production of the hollow valve is simple and costs can be reduced, as a result of the simplification of the storage and filling equipment for the coolant (19).
A valve lifter provided with a variable lift mechanism needs to form a constant direction in relation to a cam unit, and the present invention achieves this with a simple configuration without using a method that would require extraneous processing, as with conventional mating between a longitudinal groove and a pin. In the present invention, a cam sliding contact surface of a valve lifter, with which a high-lift cam or a low-lift cam is in sliding contact, is formed on a smooth inclined surface, a cam sliding contact start point on the sliding contact surface is made to be lower than a cam sliding contact end point, and an elevation difference is provided between the two points. Thereby, the high-lift cam and the low-lift cam are both, at all times, directed toward a high cam sliding contact end point higher than a low cam sliding contact start point, and the cam sliding contact surface moves from the lower to the higher along an incline, and therefore the valve lifter doesn't receiving a force about a reciprocating shaft line. For this reason, the direction of the valve lifter is constant.
[Problem] To provide a method for removing a magnetic clutch from a clutch cover. [Solution] A circular groove (8d) is formed in the outer periphery of a circular boss part (8a) of a clutch cover (8), and a circular groove (69) that faces the circular groove (8d) is formed in the inner periphery of a circular magnetic clutch (42) mounted at the outer periphery of the boss part (8a). A spring clip (90), parts (90a) of which protrude outward, is mounted in the circular groove (8d), and the parts (90a) of the spring clip engage the circular groove (69), which is on the outside, thereby restricting the movement of the magnetic clutch (42) in the axial direction. When the clutch cover (8) is removed from the engine housing (1a) and a flexible plate-type jig (100) is inserted into the slight gap (s) between the boss part (8a) of the cover (8) and the magnetic clutch (42), thereby pressing the outward-protruding parts (90a) of the spring clip into the circular groove (8d) and holding these parts in that state, and when the cover (8) is forcefully moved and then suddenly stopped so as to move the boss part (8a) downward, the magnetic clutch (42) slides and detaches from the boss part (8a) in the axial direction due to inertial force.
F01L 1/356 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate
F16D 27/10 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
78.
FRICTION-WELDING METHOD AND FRICTION-WELDING DEVICE
The present invention measures the dimensions of a workpiece (W1, W2) and uses the dimension measurement results to compute a rapid traverse distance (L × 1) for rapid traverse under the condition that a slow traverse distance (L × 2) for slow traverse is constant. An increase in the slow traverse distance is thereby eliminated, the constant slow traverse distance (L × 2) is set to a short distance, and the relative ratio of the rapid traverse distance (L × 2) is increased in comparison with a workpiece in which the workpiece dimensions are greater than normal dimensions, whether the workpiece be a workpiece of normal dimensions or a workpiece in which the workpiece dimensions are less than normal dimensions.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
B23Q 15/00 - Automatic control or regulation of feed movement, cutting velocity or position of tool or work
79.
METHOD OF FORMING POPPET VALVE FACES AND POPPET VALVES HAVING FACES FORMED BY THIS METHOD
[Problem] To provide a poppet valve and a method of forming a face thereof in which work hardening occurs while maintaining compressive residual stress to a prescribed depth from the face surface or deeper without causing coarsening of crystal grains in both a valve body and the face, and in which weld defects can be eliminated. [Solution] The method of forming a poppet valve face comprises a step of forming a built-up portion (4) in a circumferential shape on a poppet valve body (2), comprising a shaft (1b) and a plug (2a) at one end thereof, by welding onto the plug (2a), and a step of forming a face surface (6) with a prescribed aperture angle in the built-up portion (4). A flat face (5) is formed in the built-up portion (4) by removal machining the surface and the face surface (6) is formed by deforming the flat face (5). This processing applies a uniform surface pressure to a face (2b) of a poppet valve in a range from cold to warm that is a temperature range less than the recrystallization temperature. Thus, the aforementioned problem can be solved and the durability of the face can be improved.
[Problem] To provide a method for processing both end faces of round bars, the method being capable of efficiently performing chamfering and cutting of both end faces of the round bars with a series of operations. [Solution] While being rotated, a grindstone (5) is brought into contact with the circumferential surface of a long round bar (10a) that has been conveyed to a prescribed processing position and is rotating. The grindstone (5) is moved further toward the shaft center of the long round bar (10a) while being moved along the shaft center to perform the chamfering of one end face. Next, a cutting/chamfering process, which chamfers and cuts the other end face, is performed by moving the grindstone (5) toward the shaft center of the long round bar (10a). After the cut round bar has been removed, the process is repeated.
B24B 5/14 - Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfacesAccessories therefor involving centres or chucks for holding work for grinding conical surfaces, e.g. of centres
B24B 9/00 - Machines or devices designed for grinding edges or bevels on work or for removing burrsAccessories therefor
[Problem] To provide an automobile engine variable phase device having a self-locking mechanism that reliably maintains an operation for changing the opening and closing timing of an engine valve. [Solution] This engine variable phase device comprises: a drive rotating body that has a sprocket and a cylindrical section, and is driven by a crankshaft; a control rotating body that receives torque from a rotary operating force imparting means; a relative phase angle changing mechanism that changes the relative phase angle of a cam shaft relative to the drive rotating body in response to the rotation of the control rotating body; and a self-locking mechanism that utilizes cam torque to prevent the relative phase angle of the cam shaft from shifting relative to the drive rotating body. A relative displacement mechanism, which holds the sprocket in a relatively displaceable manner in a vertical direction with respect to the central axis of rotation, is disposed on the cylindrical section.
F01L 1/356 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate
[Problem] To provide an automobile engine variable phase device having a self-locking mechanism that generates a more reliable self-locking action. [Solution] This engine variable phase device comprises: a drive rotating body driven by a crankshaft; control rotating bodies that receive torque from a rotary operating force imparting means; a relative phase angle changing mechanism that changes the relative phase angle of a cam shaft relative to the drive rotating body in response to the rotation of the control rotating bodies; and a self-locking mechanism that utilizes cam torque to press a round surface section of a first control rotating body against a cylindrical section integrated with either the drive rotating body or the camshaft, preventing the relative phase angle from shifting. One or more oil guiding grooves are disposed on at least one of the inner peripheral surfaces of the cylindrical section and the round surface section.
F01L 1/356 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear making the angular relationship oscillate
[Problem] To provide a forging press device for valves, capable of reducing the number of work transfers in the period between transporting of primary molded work molded by an upsetter and arrival thereof at a forging press main unit, so as to reduce the transport and carrying in time for primary molded work to the forging press main unit. [Solution] This forging press device is provided with: an upsetter (20), which is provided with a plurality of primary forming stages; a forging press main body (10), which is adjacent to the upsetter (20) and carries out secondary forming of primary molded work (W1); and a work transfer and carry-in device that grasps and transfers the work (W1) and carries the work into the forging press main unit (10). The work transfer and carry-in device is constituted of a high-speed articulated robot (60) that is provided with an arm (62) (chuck (64)) for grasping the work (W1) and can rotate around a vertical axis (L1). The number of work transfers from the upsetter (20) to the forging press main unit (10) is reduced, the speed of a valve forging line increased, and production efficiency increased.
[Problem] To provide a method for reliably manufacturing a hollow poppet valve containing a refrigerant, with which the cooling effect of the umbrella part can be achieved effectively. [Solution] A valve manufacturing method equipped with: a step wherein a hollow part (S) that opens to the outside and extends from an umbrella part (14) to a shaft part (12) is formed within a valve main body, at the shaft-end part of which the umbrella part (14) is integrally formed; a step wherein a refrigerant and an inert gas are introduced into the hollow part (S) from the aperture part; a step wherein the aperture part is sealed with a separate member (18); and a step wherein the valve main body (W2), in which the refrigerant and the inert gas have been sealed in the hollow part (S), undergoes heat treatment in a heat treatment furnace (40). In the heat treatment step, the valve main body (W) undergoes heat treatment with the umbrella part (14) oriented downward. During the heat treatment the refrigerant (a solid) melts and moves downward within the hollow part (S) toward the umbrella part (14), and when the refrigerant cools down and solidifies it remains in the location to which it has moved. In all of the manufactured valve products the location where the refrigerant (solid) is loaded is a fixed location on the umbrella part (14) side, so the cooling effect of the umbrella part (14) can be achieved effectively.
[Problem] To provide a mechanical lash adjuster with which an adjustment to increase or decrease the valve clearance can be performed automatically. [Solution] A lash adjuster (20) that is interposed between a cam (19a) and the shaft-end part of a valve (100) biased in the valve-closing direction by means of a valve spring (14), and that adjusts the valve clearance, said lash adjuster being equipped with: a plunger (24) on which the pressing force of the cam (19a) acts; a housing (22) engaged with the plunder (24) in the axial direction via a threaded engagement part, and held so as to be incapable of rotation in the circumferential direction; and a plunger spring (26) that biases the plunger (24) in the opposite direction of the valve spring (14). The threaded engagement part is capable of sliding rotation in the direction in which the axial load acts, but the lead angle and the flank angle of the thread are set such that the threaded engagement part is incapable of relative movement when the thrust torque TF acting on the plunger (24) ≤ the friction torque TB generated at the sliding contact surface (F2) between the plunger (24) and an axial load transmission member. The plunger (24) moves in the direction in which a change in the valve clearance is eliminated, and an adjustment to increase or decrease the valve clearance can be performed automatically and reliably.
[Problem] To provide a planetary gear reducer that is compact and can freely generate a large reduction ratio. [Solution] The planetary gear reducer has: at least one planetary gear that rotates by means of an input shaft and that has a shape that integrates at a predetermined phase difference in the axial direction a first and second gear having the same shape; an affixed sun gear that meshes with the first gear; and a driven sun gear that is formed with a different number of teeth than the affixed sun gear, meshes with the second gear, and is coaxially integrated with an output shaft. The affixed and driven sun gears are external gears, the input shaft is provided with an eccentric rotational plate that can rotate around a central axis line that is eccentric by a predetermined distance from the rotational central axis line of the input shaft, the planetary gear is provided with a shaft mechanism that is eccentric by the predetermined distance from the rotational central axis of the planetary gear and is eccentric in the same direction as the direction of eccentricity of the eccentric rotational plate, and the shaft mechanism is joined to the eccentric rotational plate in a manner so as to eccentrically rotate around the rotational center axis line of the planetary gear synchronously with the eccentric rotational plate.
The present invention provides an engine valve automatic heat treatment system which reduces wasted man-hours during heat treatment of engine valves after forging. This engine valve automatic heat treatment system has an engine valve heat treatment furnace, a mechanism for conveying a forged engine valve into the heat treatment furnace, and a mechanism for conveying the heat-treated engine valve out of the heat treatment furnace. The conveyance mechanism has a first placement mechanism for placing the umbrella portion of the engine valve in a suspended state, and a first conveyance mechanism which holds the placed umbrella portion of the engine valve and conveys the same into the heat treatment furnace. The heat treatment furnace has a heating mechanism, a rail group which suspends and holds the engine valve umbrella portion and operates moving back and forth, and a stopper provided with a claw unit capable of moving back and forth towards the rail group. The conveyance mechanism has a second conveyance mechanism which holds the umbrella portion and conveys the engine valve and a second placement mechanism which suspends and places the umbrella portion.
[Problem] To provide an electromagnetic brake cooling structure for effective cooling of a brake part in a variable phase apparatus of an engine. [Solution] Provided is a variable phase apparatus configured such that a rotary drum (44) rotatably supported by a coaxial camshaft (2) (internal cylinder part (20)) which rotates relative to a sprocket (12) is braked by an electromagnetic brake (40) and the phase between the sprocket (12) and the internal cylinder part (20) is varied, wherein a clearance S1 is provided between the internal cylinder part (20) and the head (6a) of a fastening bolt (6) which fastens the internal cylinder part (20) and the camshaft body (2a) into a single unit. Engine oil is channeled from an oil passageway (70) inside the internal cylinder part (20) to an oil pan (74) disposed inward of an annular brake part (relative sliding surface) through a groove (26) (communication hole (25)) provided on the surface of a rotary drum (44) positioning spacer (24) in pressure contact with the bolt head (6a), said spacer being arranged on the outer circumference of the internal cylinder part (20). The amount by which the bolt head (6a) projects into the oil pan (74) is reduced, increasing the effective volume of the oil pan (74) and accordingly increasing the amount of oil supplied to the relative sliding surface and improving the cooling effect.
F01L 1/34 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening
[Problem] To provide an engine valve forging system with which a high-precision engine valve, such as an engine valve for which little axial bending is generated, can be manufactured. [Solution] An engine valve forging system having: a forming die that has a circular-hole-shaped shaft-forming part formed continuously with the tip of an umbrella-shape-forming part, and that forms an engine valve by extrusion-forging a material from the umbrella-shape-forming part to the shaft-forming part by means of a pressing member; and a shaft guide die that is arranged connected to the tip of the shaft-forming part and concentric with the shaft-forming part, and that has guide parts for the shaft part of the engine valve extruded from the shaft-forming part. Multiple shaft bending restriction parts are formed on the guide parts, continuously along the axial center line of the guide parts, and these bending restriction parts are formed so as to narrow gradually from the back end to the front end in the direction of the axial center line of the guide part.
Provided is a surface-hardening alloy which has a good shock resistance, a good wear resistance and a good high-temperature corrosion resistance and contains Fe that can be abundantly supplied and is less expensive. An Ni-Fe-Cr-based alloy characterized by containing 0-20.0 mass% of Mo and 8.0-40.0 mass% of W, a total of 20.0-40.0 mass% of Mo and W, 20.0-50.0 mass% of Fe, 12.0-36.0 mass% of Cr, 1.0-2.5 mass% of B with the balance comprising Ni and unavoidable impurities, and an engine valve coated with the same. The Ni-Fe-Cr-based alloy may further contain not greater than 15.0 mass% in total of element(s) selected from among Co, Mn, Cu, Si and C, wherein it is preferred that the content of Co is not greater than 15.0 mass%, the contents of Mn and Cu are each not greater than 5.0 mass%, the content of Si is not greater than 2.0 mass% and the content of C is not greater than 0.5 mass%.
University of Ulsan Foundation For Industry Cooperation (Republic of Korea)
NITTAN VALVE CO., LTD. (Japan)
Inventor
Kim Dojoong
Shiino Minoru
Sugawara Ken-Ya
Kato Mamoru
Abstract
[Problem] To provide a technique for a continuously variable valve lift device having a lift amount change mechanism which changes the amount of lift of an engine valve with increased accuracy. [Solution] A continuously variable valve lift device is provided with: a rocker arm which opens and closes a valve of an engine by a cam of a camshaft; and a lift amount change mechanism for the engine valve. The lift amount change mechanism has: a control shaft which has an eccentric circle cam; a control arm which pivots about the eccentric circle cam and which has a first arm and a cam contact section which makes contact with a first cam; a second pressing means which presses the cam contact section against the first cam; a cam member which is supported so as to be capable of pivoting about a shaft body and which has a second arm and a second cam section, the second cam section having a free curved surface shape and making contact with the rocker arm; and a link arm which has both ends supported in a pivotable manner by the first arm and the second arm.
A method for manufacturing a valve for which a mold (40) equipped with a die (42) provided with pressing projections (43) that form an umbrella-part face (16) and equipped with a pressing punch (48) is used to perform forging whereby slip deformation is produced from the inner circumferential side toward the outer circumferential side of the umbrella-part face (16), wherein the pressing projections (43) and recessed grooves (46) are provided alternating continuously in the circumferential direction on the die (42), and the umbrella-part face (16) is forged while an intermediate valve product (W3) is rotated at a prescribed angle with respect to the mold (40) in coordination with the pressing operation of the punch (48). The amount of elastic deformation of the source material in the depth direction by means of the pressing projections (43) is greater than with a conventional mold (die), and to that extent a higher hardening of the deep part of the umbrella-part face (16) is enabled. The region of plastic deformation separates in the circumferential direction, but the formed surface (forged surface) of the plastically deformed umbrella-part face (16) is smoothed by shifting the pressing location of the pressing projections (43) in the circumferential direction with each pressing operation of the punch (48).
A method for manufacturing a valve, having a primary forging step wherein a disk-shaped umbrella part is formed at the end part of a shaft, an excess thickness adjustment step wherein the thickness of the disk-shaped umbrella part is adjusted by cutting, and a secondary forging step wherein forging is performed to produce slip deformation at the edge part of the disk-shaped umbrella part, from the inner circumferential side to the outer circumferential side, thereby forming the umbrella face (16) of the valve. In the primary forging a tapered part (16a) is formed at the edge of the disk-shaped umbrella part, and in the excess thickness adjustment step only the front-surface side of the disk-shaped umbrella part is cut. The tapered part (16a) at the edge of the disk-shaped umbrella part is a surface layer part where fine forging flow lines are formed, and by means of the secondary forging the forging flow lines are made even finer, forming the umbrella face (16) of the valve, with the umbrella face having a sufficiently high hardness. The edge corner part of the disk-shaped umbrella part is not cut to a tapered shape, so raw material can be conserved and the time required for the excess thickness adjustment step can be reduced.
[Problem] To provide a technique for a rocker arm for a valve train, the technique being capable of improving the fuel consumption of an engine and capable of making the valve train compact. [Solution] A rocker arm for a valve train is formed so as to comprise: a top plate section which is pivotably supported at one end thereof by a support member for forming the pivot center, supports a valve stem by a pad surface provided at the other end, and has at the upper surface thereof a cam slide section for allowing a cam of a cam shaft to slide thereon; and at least one or more standing wall sections which are formed so that the width thereof is less than the width of the top plate section and which are provided so as to extend in substantially the vertical direction from the top plate section.
[Problem] To provide a phase-variable device of an automobile engine that can smoothly modify the relative phase angle of a cam shaft in relation to a drive rotor. [Solution] A phase-variable device of an automobile engine, comprising a drive rotor supported by a camshaft and rotated by a crankshaft, a first control rotor integrally formed with the camshaft, first turn force-imparting means for imparting relative turn torque in one direction to the first control rotor, and a reverse rotation mechanism for imparting relative turn torque in the reverse direction to the first control rotor, wherein the reverse rotation mechanism is composed of: a first action mechanism provided with a first diameter-reducing guide groove in the first control rotor, a crank member that turns in a position set at a distance from the turn center axis of the drive rotor, and a first pin mechanism that is attached to the crank member and that moves inside the first diameter-reducing guide groove; and a second action mechanism for causing first and second control rotors to turn in a relative fashion in mutually opposite directions.
F01L 1/34 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening
[Problem] To provide a deburring device for a friction welding machine, by which a burr can be removed immediately after friction welding. [Solution] A friction welding machine friction-welds the end faces of workpieces (W1, W2) by grasping the workpiece (W1) coaxially with a horizontally provided rotation main shaft (22) by a grasping mechanism (24) at the front end of the rotation main shaft (22), grasping the workpiece (W2) coaxially by a grasping mechanism (34) at the front end of an auxiliary shaft (30) movable in directions in which the auxiliary shaft moves closer to or away along the axis line (L) of the rotation main shaft (22), and moving the workpiece (W2) together with the auxiliary shaft (30) forward with respect to the workpiece (W1) that rotates integrally with the rotation main shaft (22), wherein after the workpiece (W2) is moved forward so as to pass through a doughnut-shaped cutter (50) disposed in front of the rotation main shaft (22), and both the workpieces (W1, W2) are friction-welded on the rotation main shaft (22) side of the cutter (50), the cutter (50) is moved to the rotation main shaft (22) side, and a ring-shaped burr (w) formed at the outer periphery of a workpiece joined body (W) is sheared. The grasping of the workpiece joined body (W) on the rotation main shaft (22) side is released, the auxiliary shaft (30) is moved backward, and the burr (w) is separated from the workpiece joined body (W) and falls when the workpiece joined body (W) is pulled out from the cutter (50).
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by frictionFriction welding
B23D 19/00 - Shearing machines or shearing devices cutting by rotary discs
97.
HIGH-TOUGHNESS COBALT-BASED ALLOY AND ENGINE VALVE COATED WITH SAME
Provided is a surface-hardening material provided with wear resistance and having superior shock resistance. Provided are: a high-toughness cobalt-based alloy containing 25.0-40.0 mass% of Cr, a total of 0.5-12.0 mass% of W and/or Mo, 0.8-5.5 mass% of Si, 0.5-2.5 mass% of B, no greater than 8.0 mass% of each of Fe, Ni, Mn, and Cu, and no greater than 0.3 mass% of C, the sum of Fe, Ni, Mn, Cu, and C being no greater than 10.0 mass%, and the remainder comprising 48.0-68.0% of Co and unavoidable impurities; and an engine valve coated with same.
Provided is a surface-hardening material provided with shock resistance and having superior wear resistance. Provided are: a wear-resistant cobalt-based alloy containing a total of 20.0-30.0 mass% of Mo and/or W, 0.8-2.2 mass% of B, 5.0-18.0 mass% of Cr, a total of no greater than 5.0 mass% of Fe, Ni, Mn, Cu, Si, and C, no greater than 1.0 mass% of Si, and no greater than 0.3 mass% of C, the remainder comprising 55.0-70.0 mass% of Co and unavoidable impurities; and an engine valve coated with same.
Provided is a phase variable device of an engine provided with a highly reliable self-locking mechanism which does not reduce reactivity to occurrence of a self-locking effect and is capable of further strengthening the self-locking effect. The phase variable device of the engine comprises a drive rotator driven by a crankshaft, an attachment angle changing mechanism changing the attachment angle of a camshaft, and a self-locking mechanism preventing a gap of the attachment angle of the drive rotator and the camshaft due to a disturbance torque, wherein the self-locking mechanism has a cylindrical section provided on the drive rotator, an eccentric cam integrated with the camshaft, and a lock plate holding an outer peripheral surface of the eccentric cam via a holding groove formed on the inside of the eccentric cam, and at least four stepwise contact sections in contact with an inner peripheral surface of the cylindrical section are projected in the radial direction on an outer peripheral surface of the lock plate.
F01L 1/34 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening
100.
HOLLOW POPPET VALVE AND METHOD FOR MANUFACTURING SAME
Provided is a hollow poppet valve which can be manufactured with no restrictions on raw materials without using large-scale manufacturing facilities. The poppet valve (10) is made of a heat-resistant alloy with an umbrella portion (14) integrally formed at one end of a stem portion (12), and includes a shell (W1) and a cap (18). The shell (W1) has an outer umbrella shell (14A) and the stem portion (12) which are integrally formed by hot forging, the outer umbrella shell having a bottom inwardly deeply recessed. The cap (18) is welded to the inner circumference of the bottom of the outer umbrella shell (14A) of the shell (W1). The poppet valve is formed by hot forging of a raw material which has an outstanding heat-resistant strength and mechanical strength and then subjected to heat treatment, as required, to be thereby provided with further enhanced heat-resistant strength and mechanical strength. The hot forging requires a less number of molding dies, smaller-scale manufacturing facilities, and a shorter period of time for processing, thereby making the hollow poppet valve (10) available at low costs.
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