This insulated rolling bearing unit includes a rolling bearing (1) and an insulated washer (2). An outer race (3) has an outer race width surface (9), an outer circumference cylindrical surface (10), and an outer race chamfered section (11). The outer circumference cylindrical surface (10) is coated with an insulative film (12). The insulated washer (2) has an annular protrusion (14).
F16C 35/077 - Fixing them on the shaft or housing with interposition of an element between housing and outer race ring
F16C 19/06 - 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 a single row of balls
The present invention avoids, during an operation of a ball bearing including a crown-shaped resin retainer, interference between the resin retainer and a bearing ring while suppressing a load on the resin retainer due to lag of progressing balls. When a pocket diameter on a circumferential cut surface of the resin retainer (4) is dc, a pocket diameter on a radial cut surface of the resin retainer (4) is dr, and a diameter of the ball (3) is Da, Da < dr < 1.07 Da ≤ dc is satisfied.
F16C 19/06 - 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 a single row of balls
This bearing device has a magnetic ring attached to a rotary member, and has a sensor unit which is attached to a counterpart member and provided with a sensor, a wireless communication circuit, a power supply circuit, and a stator, resulting in the stator and the magnetic ring to oppose each other in the radial direction. In the bearing device, the space required for arranging the sensor unit and the magnetic ring is reduced by suppressing the size of the sensor unit. In the sensor unit (4), the stator (7) is provided at a finite length in the circumferential direction. The stator (7), the sensor (11), the wireless communication circuit (12), and a power supply circuit (13) are arranged on the same circumference.
F16C 19/04 - 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
This rolling bearing comprises an outer member (1) and an inner member (2), a plurality of rolling elements (3) disposed along the circumferential direction in an annular space between an inner diameter surface of the outer member (1) and an outer diameter surface of the inner member (2), a locking portion (11) in the circumferential direction provided on one of the outer member (1) and the inner member (2) and a sliding contact portion (12) in the circumferential direction provided on another outer member (1) and another inner member (2), and a retaining ring (20) that abuts the locking portion (11) and the sliding contact portion (12) and that makes electrical connections between the outer member (1) and the inner member (2), wherein the retaining ring (20) is electrically conductive and elastically deformable, and is a rolling bearing that contacts the sliding contact portion (12) with an interference a in the axial direction.
F16C 19/06 - 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 a single row of balls
5.
SLIDING CONSTANT VELOCITY UNIVERSAL JOINT AND WHEEL DRIVING DEVICE PROVIDED WITH SAME
In a double offset type sliding constant velocity universal joint 1 provided in a power transmission system of a vehicle using an electric motor as a drive source, an axial clearance (pocket clearance) δ1 is formed between a pocket 12 of a holder 5 and a ball 4, and an axial clearance δ2 of 0.6 mm or more is formed between a spherical surface part 15 of an inner peripheral surface of the holder 5 and a spherical outer peripheral surface 8 of an inner joint member 3.
F16D 3/227 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a cylinder co-axial with the respective coupling part the joints being telescopic
6.
INFORMATION PROCESSING DEVICE AND INFORMATION PROCESSING METHOD
A monitoring device (100) creates a report on the basis of a pre-maintenance physical quantity detected by a sensor (S) before first maintenance in response to an anomaly in a wind power generation unit (45), and of a post-maintenance physical quantity detected after the first maintenance by the sensor (S) which has detected the pre-maintenance physical quantity, and outputs the report.
A calculation device (102) identifies the type of a second anomaly. The calculation device determines a maintenance schedule for the second anomaly on the basis of the type of the second anomaly. The communication interface (106) outputs the maintenance schedule.
A roller fall-off prevention tool (1) is applied to a bearing (11) in a form in which a roller (13) falls on an inner diameter side of a cage (12). On the outer periphery of both end portions in an axial direction, a tapered portion (2) is formed, in which an incident angle with respect to the bearing (11) is less than 45°. The outer periphery of an intermediate portion in the axial direction is a straight portion (3) forming a cylindrical surface parallel to the axis. From both end surfaces in the axial direction, four or more slits (4) are alternately formed at equal intervals in a circumferential direction. When the tool is mounted on the bearing (11), the straight portion (3) is brought into contact with the roller (13) by being fitted into the inner side of the inscribed circle of the roller (13) from the small-diameter end of the tapered portion (2). When the tool is removed from the bearing (11), the shaft or the inner ring is abutted against a ridge (5) extending in the axial direction on the inner diameter surface.
F16C 41/04 - Preventing damage to bearings during storage or transport thereof or when otherwise out of use
F16C 19/26 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
Provided are a sealing device capable of achieving both low torque and high sealing performance by improving grease applied to a seal lip and a mating member thereof, and a rotating component that employs the sealing device. A sealing ring 14 is fixed to a fixed-side member 2 of the rotating component, is in sliding contact with a rotating-side member 15, and has a seal lip in sliding contact with the rotating-side member 15, wherein grease is applied to the sliding contact surface of the seal lip; the grease contains a base oil, a thickener, and an additive, and the apparent viscosity of the grease at a shear rate of 1,000 s-1 at 60°C is 0.22 Pa s or more.
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
C10M 107/02 - Hydrocarbon polymersHydrocarbon polymers modified by oxidation
C10M 115/08 - Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof containing nitrogen
C10M 135/10 - Sulfonic acids or derivatives thereof
C10M 159/24 - Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing sulfonic radicals
C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well defined but for which the chemical nature is either unspecified or only very vaguely indicated
C10M 171/02 - Specified values of viscosity or viscosity index
F16C 19/06 - 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 a single row of balls
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
F16J 15/18 - Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
F16J 15/324 - Arrangements for lubrication or cooling of the sealing itself
F16J 15/3232 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
C10N 30/00 - Specified physical or chemical property which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
A first mathematical expression is prepared which enables a determination for a rolling bearing (10) comprising an inner ring (11), an outer ring (12), a plurality of rolling elements (13), and a lubricant (LQ). In accordance with a usage condition of the rolling bearing (10), it is determined whether the following first mathematical expression (1): F=f(α,β,γ,δ) satisfies the following second mathematical expression (2): F≤10. In parameter calculation for the lubricant (LQ), the lubricant (LQ) is divided into a first region and a second region. In a virtual electric circuit corresponding to the rolling bearing (10), a characteristic value of a virtual element assessed for the first region and the second region is determined.
F16C 19/06 - 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 a single row of balls
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
Provided is a power conversion device having a configuration in which a plurality of types of generators are connected, the control of the plurality of types of generators being capable of being switched using a switching control method. The power conversion device performs power conversion of power input from each of the plurality of types of generators and outputs the result toward a load, the power conversion device comprising: a shared power conversion circuit that has the load connected thereto and performs the power conversion, each of the plurality of types of generators being connected to the shared power conversion circuit via a switching unit; and a control unit that controls each of the plurality of types of generators. The control unit switches control programs for controlling the plurality of types of generators, and uses the switched control programs. The switching unit concurrently switches power input from the plurality of types of generators and inputs the switched power to the shared power conversion circuit. The control unit switches the control programs to control programs corresponding to the generators and uses the adapted control programs.
Provided is a rolling bearing fitted with an electroconductive seal in which a seal member (5) is formed of electroconductive rubber, and a seal sliding contact surface (13) with which a seal member (5) is in sliding contact is formed on an inner race (2). The seal sliding contact surface (13) is a surface in which the skewness Rsk and the kurtosis Rku of a roughness curve in a direction orthogonal to the circumferential direction are such that Rsk>0 and Rku<3.
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16C 19/06 - 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 a single row of balls
Provided are a rolling bearing cage and a rolling bearing using the cage, the rolling bearing cage making it possible to: maintain an oil film on a contact surface even with a small amount of lubricant by defining the surface roughness of the cage by means of a plurality of three-dimensional surface roughness parameters; and stably maintain a low friction state even under severe lubrication conditions. The cage 5 is a resin-made cage for the rolling bearing, and has a plurality of pockets 6 that hold rolling elements. A value of A = (Sa/10) + Str + (Spk/10) obtained from an arithmetic average height Sa, an aspect ratio Str of surface properties, and a protruding peak height Spk on the surface 6a of the pockets 6 is equal to or greater than 1.20.
F16C 19/16 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
A ball bearing includes a cage circular annular portion and a seal member. The cage circular annular portion has a cage-side sliding contact surface axially opposed to the seal member and configured to come into sliding contact with the seal member. The seal member has a seal-side sliding contact surface configured to come into sliding contact with the cage-side sliding contact surface. A plurality of axial protrusions each having an axially convex circular arc shape in cross sections along a circumferential direction are formed on one of the cage-side sliding contact surface and the seal-side sliding contact surface at constant pitches in the circumferential direction.
F16C 19/06 - 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 a single row of balls
A film (manganese phosphate film 20) that reduces surface roughness to less than that of a base material surface is formed on at least one surface among a cylindrical inner peripheral surface 6 of an outside joint member 2 of a double offset type constant velocity universal joint 1, a surface of a track groove 7 of the outside joint member 2, a spherical outer peripheral surface 8 of an inside joint member 3, a surface of a track groove 9 of the inside joint member 3, a spherical surface section 13 of an outer peripheral surface of a retainer 5, and a spherical surface section 15 of an inner peripheral surface of the retainer 5.
F16D 3/227 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a cylinder co-axial with the respective coupling part the joints being telescopic
The present invention addresses the problem of suppressing movement of a slinger in an axial direction regardless of the resultant axial length of a cylindrical part of the slinger. An outer-side seal member (10) of a wheel bearing device (1) comprises: a slinger (13) that is provided to a base part (3d) of a hub flange (3b) and that has a cylindrical part (13a) which fits into an outer peripheral surface (3j) of a hub ring (3) and a disk part (13b) which faces the hub flange (3b); and a seal member (12) that has a seal lip. The outer peripheral surface (3j) of the hub ring (3) has a fitting part (31) into which the cylindrical part (13a) of the slinger (13) fits. The fitting part (31) has a small-diameter section (311) and a large-diameter section (312) that is positioned farther from the hub flange (3b) than the small-diameter section (311) in the axial direction and that is formed to have a diameter larger than that of the small-diameter section (311).
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
F16J 15/3232 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
F16J 15/3256 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
17.
COLLECTION ARRANGEMENT MEMBER, COLLECTION ARRANGEMENT DEVICE, AND COLLECTION ARRANGEMENT METHOD
The present invention comprises: a collection pin (141) having a hollow shape and capable of cutting and collecting a to-be-processed material; an arrangement pin (142) that contacts, inside the collection pin (141), the to-be-processed material in the collection pin (141), and presses the to-be-processed material to arrange the to-be-processed material outside the collection pin (141); and a fixing holder (143) to which the collection pin (141) is fixed. The to-be-processed material is a gel sheet in which a gel for supporting an object to be collected is formed in a sheet shape.
C12M 1/34 - Measuring or testing with condition measuring or sensing means, e.g. colony counters
G01N 1/04 - Devices for withdrawing samples in the solid state, e.g. by cutting
18.
METHOD FOR ESTIMATING ROLLING VISCOSITY RESISTANCE, SYSTEM FOR ESTIMATING ROLLING VISCOSITY RESISTANCE, PROGRAM FOR ESTIMATING ROLLING VISCOSITY RESISTANCE, AND COMPUTER-READABLE RECORDING MEDIUM IN WHICH SAID PROGRAM IS RECORDED
A rolling bearing 1 comprises raceway surfaces 11a, 12a, and a rolling element 13 that rolls on the raceway surfaces. In the rolling bearing 1, the raceway surfaces and the rolling element are brought into point contact with each other, an oil film is formed at the point contact portion, and the raceway surfaces 11a, 12a are provided with a contact part that comes into contact with the rolling element 13 and a non-contact part that does not come into contact with the rolling element. An estimated value Fr,w of the rolling viscous resistance is calculated from a regression equation in which the scope of calculation in the major-axis direction of a contact ellipse is a length selected within a range that exceeds the major-axis radius of the contact ellipse and does not exceed the equivalent radius in the axial direction.
F16C 19/06 - 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 a single row of balls
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
Provided is a clutch unit 1 including: an input-side clutch 10 that controls the transmission and blocking of torque which is input through a lever operation; an output-side clutch 20 that, when no lever operation is performed, is set to a locked state that restricts the rotation of an output shaft 2 and blocks reverse input torque which is input to the output shaft 2; and a lock mechanism 30 that restricts the rotation of the output shaft 2 at an axial position different from that of the output-side clutch 20. The lock mechanism 30 restricts the rotation of the output shaft 2 by meshing external teeth 31b of a first lock element 31 that rotates integrally with the output shaft 2 with internal teeth 32a of a second lock element 32 that is restricted from rotating about the axis X of the output shaft 2, and releases the meshing state of the external teeth 31b and the internal teeth 32a when the second gear 32 is moved in the axial direction through a lever operation. The tooth width L2 of the internal teeth 32a of the second lock element 32 is set to be smaller than the tooth width L1 of the external teeth 31b of the first lock element 31.
F16D 41/10 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing
F16D 41/08 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action
F16D 41/066 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
An electric motor device comprises: a stator (4) that has a stator magnetic body (17) and an excitation coil (3) wound around the stator magnetic body (17); a rotor (6) that has a magnetic pole facing the stator (4) and that is rotatably supported with respect to the stator (4); and a support body (Sp) that supports the stator magnetic body (17). The stator magnetic body (17) is provided with cavities (17b) from the location where the excitation coil (3) is provided to the location where the stator magnetic body is fixed to the support body (Sp). The magnetic pole of the rotor (6) faces the stator (4) in the radial direction of a coordinate system with the rotation axis of the rotor (6) as the axial direction, and the stator magnetic body (17) is fixed to the support body (Sp) at an inner diameter-side end part thereof. The cavities (17b) are provided in the radial positions between an inner diameter-side portion of a fixing part to the excitation coil (3) and a fixing part to the support body (Sp), in the stator magnetic body (17).
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 1/12 - Stationary parts of the magnetic circuit
H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
H02K 9/00 - Arrangements for cooling or ventilating
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 11/33 - Drive circuits, e.g. power electronics
An outer surface rubber portion is formed to cover the entire axially outer surface of a metal core. An inner surface rubber portion is formed with a circular annular opening through which the axially inner surface of the metal core is exposed on the same circumference passing on the radially outer side of minute protrusions; and circular arc-shaped openings through which the axially inner surface of the metal core is exposed on the same circumference passing on the radially inner side of the minute protrusions.
A rolling component has a surface and is made of steel. The rolling component comprises a surface layer portion that is a region up to 20 m in depth from the surface. The rolling component is intended for use with hydrogen-utilizing equipment. The steel contains 0.70 mass percent or more and 1.10 mass percent or less of carbon, 0.15 mass percent or more and 0.35 mass percent or less of silicon, 0.30 mass percent or more and 0.60 mass percent or less of manganese, 1.30 mass percent or more and 1.60 mass percent or less of chromium, 0.01 mass percent or more and 0.50 mass percent or less of molybdenum, and 0.01 mass percent or more and 0.50 mass percent or less of vanadium, with a balance consisting of iron and unavoidable impurities. In the surface layer portion, the steel has a nitrogen concentration of 0.2 mass percent or more.
F16C 19/06 - 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 a single row of balls
C21D 9/36 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ballsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for rollers
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
A control device controls an attitude control actuator by means of which a distal end member located on a link actuation device can be moved. A parallel linkage mechanism includes a proximal end-side link hub, a distal end-side link hub, and three linkages via which the distal end-side link hub is coupled to the proximal end-side link hub in such a manner that allows the attitude of the distal end-side link hub to change relative to the proximal end-side link hub. The control device includes a parameter switcher which switches control parameters to adjust the jerk of the attitude control actuator or the distal end member based on a load applied to the distal end member. The parameter switcher can switch more than one control parameter including at least one of the filter time constant of a moving average filter or a model following control gain.
A rolling bearing (100) supports a rotating shaft of a drive unit for a vehicle. The rolling bearing comprises an inner ring (10), an outer ring (20), and a rolling element (30) which are made of quenched and tempered steel. The inner ring, the outer ring, and the rolling element respectively have rolling surfaces (10da, 20ca, 30a). The dislocation density of retained austenite in a surface layer of at least one of the rolling surfaces of the inner ring and the outer ring is 2.5 × 1014m-2or more and 1.0 × 1017m-2 or less.
C21D 9/36 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ballsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for rollers
C21D 9/40 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ringsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for bearing races
F16C 19/06 - 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 a single row of balls
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
Provided is a shaft seal capable of reducing the variation in the inner diameter contraction amount at the time of installation in a housing, while reducing the rotational torque of the shaft seal, thereby suppressing variation in the rotational torque. A shaft seal 5 is an annular shaft seal provided between a rotary shaft 6 and a housing 7, and is provided with an inner diameter lip 2, and an outer diameter lip 1 provided on the outer diameter side of the inner diameter lip 2. In the shaft seal 5 in a free state, when the height of the outer diameter lip 1 is L1 and the height of the inner diameter lip 2 is L2, 0.5 ≤ (L1/L2) ≤ 0.9 is satisfied, and the inclination angle with respect to the axial direction of the outer diameter lip 1 is larger than 5°.
A plunging type constant velocity universal joint has six torque transmission balls, and a curvature center of a spherical outer peripheral surface and a curvature center of a spherical inner peripheral surface of a cage are offset toward opposite sides in an axial direction with respect to a joint center. The plunging type constant velocity universal joint is used at a normal operating angle of from 8° to 12°. A ratio DBALL/DSPCD of a diameter (DBALL) of the torque transmission ball to a spline pitch circle diameter (DSPCD) of a coupling hole of an inner joint member is within a range of 0.80 to 0.86. A contact angle of the torque transmission ball and a linear track groove is within a range of 32° to 35°. A contact ratio of the torque transmission ball and the linear track groove is within a range of 1.05 to 1.08.
F16D 3/226 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a cylinder co-axial with the respective coupling part
F16D 3/223 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
27.
SILICON NITRIDE SINTERED BODY, MACHINE PART, AND BEARING
To provide a silicon nitride sintered body, a machine part and a bearing that have superior mechanical properties and sliding properties. A rolling element 4 is a silicon nitride sintered body including a silicon nitride particle, a rare earth element and an aluminum element. In a range in which the sum of the area of the upper-size crystal grain diameter within a range where the crystal grain diameter of a β-type Si3N4 particle in the silicon nitride sintered body has the crystal orientation of 15-180 degrees, is 30% relative to an area of the total crystal grain diameter, the crystal grain diameter of the β-type Si3N4 particle is 1-4 μm by circle equivalent diameter and/or the aspect ratio of the β-type Si3N4 particle is 3-6.
C04B 35/584 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on borides, nitrides or silicides based on silicon nitride
F16C 19/06 - 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 a single row of balls
A casing 10 that accommodates an electric motor 2 and a ball screw 30 as a motion conversion mechanism 3 includes a first case 11 that is made of an aluminum alloy and accommodates the electric motor 2 and a second case 12 that is coupled to the first case 11 in an axial direction in a state of accommodating the ball screw 30. The electric motor 2 is supported by the second case 12 via a metal bracket 8 and a screw 9, and the entire outer surface of at least one of the metal bracket 8 and the second case 12is covered with an insulating film C.
A stator 2 includes: an annular stator core 10 having a plurality of teeth 12; a coil 30 wound around each tooth 12; a crossover wire 31 connecting adjacent coils 30; and a terminal 42 electrically connected to the crossover wire 31. The plurality of the coils 30 and the crossover wire 31 are formed of one coil wire. The crossover wire 31 is provided with a tension relaxation mechanism 51 that is bent in contact with a region other than a contact part P1 with the terminal 42.
A plunging type constant velocity universal joint includes an outer joint member having a plurality of linear track grooves, an inner joint member having a plurality of linear track grooves, a plurality of torque transmission balls, and a cage configured to accommodate the torque transmission balls in pockets. A curvature center of a spherical outer peripheral surface and a curvature center of a spherical inner peripheral surface of the cage are offset toward opposite sides in an axial direction with respect to a joint center. A spherical clearance that allows guide in contact is formed between a spherical outer peripheral surface of the inner joint member and a spherical inner peripheral surface of the cage. A positive axial clearance is formed between the pocket of the cage and the torque transmission ball.
F16D 3/2245 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a sphere where the groove centres are offset from the joint centre
F16D 3/223 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
A feed screw mechanism includes a rotary member having a female screw portion, a linear motion member having a male screw portion screwed to the female screw portion and making a linear motion with rotation of the rotary member, a lubricant between the female and male screw portions, a housing housing the rotary and linear motion members, and a wall portion protruding, in a radial direction, from the outer peripheral surface of the linear motion member. The wall portion moves together with the linear motion member, and an outer radial end portion of the wall portion is disposed: to not contact the inner peripheral surface of the housing and a member provided on the inner peripheral surface of the housing; or to be slidable with respect to the inner peripheral surface of the housing or the member provided on the inner peripheral surface of the housing.
F16H 25/24 - Elements essential to such mechanisms, e.g. screws, nuts
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
The present invention provides: a retainer for rolling bearings, which has excellent heat resistance, is capable of achieving good moldability even in cases where the retainer is, for example, thick, and has excellent strength; and a rolling bearing which uses this retainer. This retainer 5 is a retainer for rolling bearings, which is formed by injection molding a resin composition and has a plurality of pockets 6 for holding rolling bodies. The resin composition contains the following components (A) to (C). (A) 30-89.9% by mass of a copolymerized polyamide resin which contains, as constituent units, a hexamethylene terephthalamide unit and a hexamethylene adipamide unit (B) 10-50% by mass of glass fibers or carbon fibers (C) 0.1-20% by mass of a plate-shaped filler
C08L 77/06 - Polyamides derived from polyamines and polycarboxylic acids
F16C 19/16 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
A rolling component has a surface and is made of steel. The rolling component comprises a surface layer portion that is a region up to 20 μm in depth from the surface. The steel contains 0.70 mass percent or more and 1.10 mass percent or less of carbon, 0.15 mass percent or more and 0.35 mass percent or less of silicon, 0.30 mass percent or more and 0.60 mass percent or less of manganese, 1.30 mass percent or more and 1.60 mass percent or less of chromium, 0.01 mass percent or more and 0.50 mass percent or less of molybdenum, and 0.01 mass percent or more and 0.50 mass percent or less of vanadium, with a balance consisting of iron and unavoidable impurities. In the surface layer portion, the steel has a nitrogen concentration of 0.2 mass percent or more.
A shell type roller bearing includes a shell outer ring that includes a cylindrical portion (12) and a flange (13) extending radially inward from one axial end of the cylindrical portion and that is made of an austenitic stainless steel material. One axial end portion of an inner peripheral surface (16) of the cylindrical portion (12) is a tilted surface (16b), the inner diameter of the tilted surface (16b) is larger than the inner diameter of an axial middle region of the inner peripheral surface (16), and the hardness of the flange (13) is in the range of 300 to 450 HV.
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16C 19/26 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
A grinding apparatus includes: a grinding member driving unit having a motor that rotates a grinding member; a table driving unit that brings the grinding member into contact with a workpiece by moving the grinding member and the workpiece relative to each other; an AE sensor that detects an acoustic emission generated when the grinding member and the workpiece are brought into contact with each other; and a controller that controls a cut-in speed of the grinding member into the workpiece by controlling the table driving unit. The controller controls the cut-in speed using an output of the AE sensor and a motor current of the grinding member driving unit.
B24B 49/00 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
B24B 49/10 - Measuring or gauging equipment for controlling the feed movement of the grinding tool or workArrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
B24B 51/00 - Arrangements for automatic control of a series of individual steps in grinding a workpiece
A mechanical component includes steel and has a surface. The steel is quenched and tempered. The mechanical component includes a nitrided layer on the surface and a core farther away from the surface than the nitrided layer. A nitrogen concentration in the steel on the surface is greater than or equal to 0.01 mass percent. A hardness of the steel on the surface is greater than or equal to 820 Hv. An amount of residual austenite in the steel in the core is greater than or equal to 0.1 volume percent and less than or equal to 9 volume percent. A dislocation density of the residual austenite in the steel in the core is greater than or equal to 4.0×1014 m−2. The steel is high carbon steel or bearing steel.
C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
C21D 1/18 - HardeningQuenching with or without subsequent tempering
C21D 9/40 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ringsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for bearing races
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
A wrist joint unit (HU) comprises: an arm (5); a first rotation member (6) that is provided so as to be rotatable about a first rotation axis (C1); a bevel gear (7) that is a second rotation member provided so as to be rotatable about a second rotation axis (C2) orthogonal to the first rotation axis (C1); a first motor (9) that is supported by the arm (5) and that drives the first rotation member (6) to rotate; and a second motor that is supported by the arm (5) and that drives the bevel gear (7) to rotate. The first rotation member (6) is supported in a cantilever manner by the arm (5), and the bevel gear (7) which is the second rotation member is supported in a cantilever manner by the first rotation member (6). An end effector (11) can be fitted to the bevel gear (7).
This rotational load device comprises a slide tube (16) which is fitted around the outer perimeter of a rotary shaft (15) so as to be slidable in the axial direction and an elastic member (17) which biases the slide tube (16) in the axial direction, wherein a cam groove (30), the axial position of which changes along the circumferential direction, is formed in the slide tube (16), and a cam pin (31), which slides inside the cam groove (30) when the rotary shaft (15) rotates, is provided in the outer periphery of the rotary shaft (15).
Provided is a ball bearing which is used at a dmn value of not less than 700,000. The retainer (10) is a crown-shaped retainer including engineering plastic, wherein: the diameter φx of a ball (5), the radius Ry of a radial-direction inner peripheral surface (D) of a pocket (11) in a cross-section that passes through the pocket center (C) and that includes the axial center (O) of the bearing, and the radius Rz of a circumferential-direction inner peripheral surface (E) of the pocket (11) in a cross-section that, at the pocket center (C), is orthogonal to a straight line in the bearing radius direction which passes through the pocket center (C) satisfy φx<2Ry<2Rz; and the center (C2) of a second inner peripheral surface (E2) at the tip end side of the circumferential-direction inner peripheral surface (E) is further eccentric to the base part (12) side in comparison to the center (C1) of a first inner peripheral surface (E1) on the base part (12) side.
F16C 19/06 - 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 a single row of balls
Provided is a ball bearing having a structure in which: a cage is less susceptible to expansion in diameter due to a load of centrifugal force during high-speed rotation; and more lubricating oil is allowed to flow from the back side of the cage toward the inner raceway member. A ball bearing 20 has a cage 24 having: an annular base part 30 positioned on one side in the axial direction of a ball 23; and multiple pairs of retaining claws 32 extending from the annular base part 30 toward the other side in the axial direction. A pocket 31 having a spherical recessed surface is formed in the opposite surfaces of each pair of the retaining claws 32 and in one axial end face of the annular base part 30 in order to house the ball 23 in such a manner as not to fall off in the axial and radial directions. In the ball bearing in which a back surface of the annular base part 30 on one side in the axial direction has an outer diameter corner 30a and an inner diameter corner 30b that are chamfered, the annular base part 30 has a larger chamfered part formed at the outer diameter corner 30a of the back surface than that formed at the inner diameter corner 30b.
F16C 19/06 - 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 a single row of balls
F16C 33/66 - Special parts or details in view of lubrication
Provided is a clutch unit which prevents a locking mechanism from switching from an engagement state to an engagement-released state due to torque which is inputted from an output side of a drive shaft. This clutch unit 1 has: an output-side clutch 20 for restricting the torque-induced rotation of a drive shaft 2 around an axis P; an input-side clutch 10 which has an input-side first rotation member 11 to which torque is inputted by an operation lever 40, and an input-side second rotation member 13 for transmitting torque to the drive shaft 2, and is capable of switching between a connection state in which torque is transmitted by the operation lever 40 and a connection-released state in which torque is not transmitted; and a locking mechanism 50 configured so as to be capable of switching between an engagement state in which rotation of the drive shaft 2 is suppressed by the operation lever 40, and an engagement-released state in which rotation is not suppressed. The torque transmission mechanism input-side clutch 10 of the clutch unit 1 is in a connection-released state when positioned at the location at which the operation lever 40 switches the locking mechanism 50 to the engagement state.
F16D 41/10 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action with self-actuated reversing
F16D 41/067 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical and the members being distributed by a separate cage encircling the axis of rotation
42.
SILICON NITRIDE SINTERED BODY, MACHINE PART USING SAME, AND BEARING
Provided are: a silicon nitride sintered body having both workability and favorable mechanical characteristics; a machine part using the same; and a bearing. This silicon nitride sintered body has a Vickers hardness of 1,220-1,400 Hv, the maximum diameter of holes in a surface layer part that is a region within 2 mm from the surface of the silicon nitride sintered body is at most 30 μm, the silicon nitride sintered body has a degree of crystallinity of 75-90% and contains a rare-earth element and an aluminum element, the content of the rare-earth element is 6-13 wt%, in terms of oxide, with respect to the total weight of the silicon nitride sintered body, and the content of the aluminum element is 6-13 wt%, in terms of oxide, with respect to the total weight of the silicon nitride sintered body.
C04B 35/591 - Fine ceramics obtained by reaction sintering
F16C 19/06 - 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 a single row of balls
A vibration measurement device includes an acceleration sensor, an acceleration sensor mounting fixture, a spacer as an insulating member, and a heat shrink tube. The acceleration sensor includes an element. The acceleration sensor mounting fixture is disposed on a side of the acceleration sensor, adjacent to an object under measurement. The spacer is sandwiched between the acceleration sensor and the acceleration sensor mounting fixture so as to be in contact with both the acceleration sensor and the acceleration sensor mounting fixture. The heat shrink tube covers a sensor outer edge and a mounting fixture outer edge. The heat shrink tube includes a region protruding outward of acceleration sensor and the acceleration sensor mounting fixture as viewed from above.
This transmission shaft is used in a transmission and has a raceway surface on which needle rollers roll. The transmission shaft includes a base material and a triiron tetraoxide film. The base material includes any one of chromium steel, chromium-molybdenum steel, or nickel-chromium-molybdenum steel, and has, on a surface thereof, a diffusion layer including crystal grains of at least one of iron carbide, iron nitride, or iron carbonitride. The triiron tetraoxide film is formed on the surface of the base material and is disposed at least on the raceway surface.
A bearing includes a plurality of claws located in a circumferential direction at an end face of an inner ring and protruding from the end face of an inner ring in an axial direction. A lock mechanism can be used to fasten the claws to a shaft. At least one of the plurality of claws has an opening provided therein.
F16C 19/06 - 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 a single row of balls
F16C 23/08 - Ball or roller bearings self-adjusting
In a tripod type constant velocity universal joint 1 of a double roller type, a carbon content in a core portion of a tripod member 3 is set to 0.23 to 0.44%, and a hardened layer 16 of a carburized layer is provided on the surface of a leg shaft 32. A first region P having a radius of curvature Ra in a cross section in a direction orthogonal to a joint axial direction including an axial line of the leg shaft 32 and a second region Q having a radius of curvature Rb in a cross section in the joint axial direction including the axial line of the leg shaft 32 are provided in an intermediate portion 33 provided between a body portion 31 of the tripod member 3 and the leg shaft 32. Ra>Rb is set.
F16D 3/205 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
47.
SENSOR HOLDER AND BEARING DEVICE FOR VEHICLE WHEEL
Provided are: a sensor holder that can prevent influence on the performance of encoder reading by a sensor; and the like. A sensor holder 12 is provided with: a cap part 121 that is fitted into an outer ring 2 so as to cover an inner-side opening 2a of the outer ring 2; a sensor support part 122 that, at a portion of the cap part 121 opposing a magnetic encoder 11, protrudes from the cap part 121 toward one side in the axial direction, and supports a rotation speed sensor 13 for detecting displacement of the magnetic encoder 11; and a nut holding part 123 that protrudes from the cap part 121 toward the one side in the axial direction and holds a nut 124 for securing the rotation speed sensor 13 onto the cap part 121. The sensor support part 122 and the nut holding part 123 are formed separately, and one axial end surface 124a of the nut 124 held by the nut holding part 123 protrudes further toward the one side in the axial direction than one axial end surface 122c of the sensor support part 122.
A flexible boot for a constant velocity universal joint includes: attachment portions to a mating member at both ends; and a bent portion provided between the attachment portions and absorbing deformation caused by operation of a constant velocity universal joint. The flexible boot is made of a rubber material obtained by blending 50 to 80 parts by weight of HNBR having an acrylonitrile content of 15 to 21 wt % and 20 to 50 parts by weight of EPDM, the rubber material having an elastic recovery rate of 18% or more at −40° C. in a TR test.
Provided is a sintered oil-impregnated bearing comprising, on the inside-diameter surface thereof, a radial-dynamic-pressure-generating part having radial dynamic pressure grooves and dynamic pressure ridges between the dynamic pressure grooves. In a shape in which the circularity of the radial dynamic pressure grooves is linearly developed, a ridge rising ratio E is set to 0.5 or less, the ridge rising ratio E being calculated as (A + B)/D, where A and B respectively are the width dimensions of two ridge rising edges at the height position of the dynamic pressure ridges where the dimension from a center line along the development direction is 0.2 μm, and D is the total ridge width.
Provided is a tapered roller bearing of an inner ring guidance design. A smaller diameter annular part of a cage and a smaller rib of an inner ring of the bearing defines a smaller diameter-side clearance S1. A larger diameter annular part of the cage and a larger rib of the inner ring defines a larger diameter-side clearance S2. The bearing defines a dimensionless number Y which is in the range of at least 0.39 to no more than 0.88 according to the following equation: Y=(Smax/S3)×(d/l)
where d and l are a mean roller diameter and a roller length of the tapered rollers, respectively, S3 corresponds to the equation: S3=(W/2)/tan θ−(PCD/2+(d/2)/sin θ−((D/2)2−(W/2)2)1/2), Smax is chosen from the maximum values of S1 and S2, W is a pocket width of the cage, θ is a pillar angle which is a half of the angle formed, in a section corresponding to the mean roller diameter d, by surfaces of adjacent pillars of the cage that make contact with a tapered roller located in between, PCD is the diameter of roller centers representing the pitch circle diameter of the arrangement of the tapered rollers, and D is a cage inner diameter.
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
Provided is a bearing electrolytic corrosion prevention device that is excellent in prevention of wear in a ground shaft while being capable of preventing electrolytic corrosion of a rolling bearing for supporting a motor shaft, by electrically connecting the motor shaft and the ground shaft and electrically connecting the ground shaft and a case. To this end, the conductive ground shaft (11) is disposed so as to rotate together with the motor shaft (2) while being electrically connected to the motor shaft. A conductive case (10) is disposed apart from the ground shaft (11) and the motor shaft (2). A bearing (12) for supporting the ground shaft supports the ground shaft (11) with respect to the case (10). The ground shaft (11) and the case (10) are electrically connected by a conductive fluid (13) sealed between the case (10) and the ground shaft (11).
H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
F16C 19/06 - 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 a single row of balls
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
F16C 35/07 - Fixing them on the shaft or housing with interposition of an element
H02K 1/22 - Rotating parts of the magnetic circuit
52.
ATTACHMENT STRUCTURE FOR UNIVERSAL CONSTANT-VELOCITY JOINT BOOT
This attachment structure for a boot is obtained by fitting an annular protrusion section 26, provided on the inner peripheral surface of a large-diameter cylindrical part 21 (fixing part A) of the boot 20, to a first annular groove 8, provided on the outer peripheral surface 6a of a boot fixed part B of an outer joint member 2, and securely fastening the outer peripheral surface of the fixing part A with a boot band 24 in a state in which annular protrusions 10 provided on both sides of the first annular groove 8 in the axial direction are pressed against the inner peripheral surface of the fixing part A, and thereby attaching and fixing the fixing part A to the boot fixed part B. Support parts 11 which contact and support the inner peripheral surface 21a of the fixing part A from outside the range of the band width of the boot band 24 are provided on the outer peripheral surface of the boot fixed part B, and are disposed on both sides of the boot band 24 in the axial direction.
This rolling member has a surface and is made of steel having undergone quenching and tempering. The rolling member includes a nitrided layer formed on said surface. The nitrogen concentration on the surface is 0.20 mass percent or greater. The carbon concentration on the surface is 0.70-1.5 mass percent. The hardness at the surface is 820-1000 Hv. The amount of retained austenite on the surface is 20 volume percent or less.
C21D 9/40 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ringsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for bearing races
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
F16C 19/06 - 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 a single row of balls
The present invention is an oil-impregnated sintered bearing in which 5 or more axial grooves are formed in a bearing inner diameter surface at a predetermined pitch along the circumferential direction, said oil-impregnated sintered bearing being formed by the grooves and ridges formed between the adjacent grooves along the circumferential direction. The surface opening ratio of the grooves is larger than the surface opening ratio of the ridges. The ridge/groove ratio is 1 or less, and the circumferential length of the ridges is 0.1 mm or more. The depth of the grooves is 8 times or less the size of the gap between the inner diameter surface and the outer diameter surface of a shaft member. The interval angle of the circumferential interval between ridges adjacent to each other along the circumferential direction is 72° or less.
Provided are: a seal material composed of a PTFE resin composition that can be used universally and is excellent in abrasion resistance and non-aggressiveness to mated materials; a seal member for a compressor, the seal member being composed of the seal material; a cup seal for a reciprocating compressor, the cup seal being composed of the seal material; and a tip seal for a scroll compressor, the tip seal being composed of the seal material. The seal material composed of a polytetrafluoroethylene resin composition contains polytetrafluoroethylene resin as a base resin and zinc powder (metallic zinc powder or copper-zinc alloy powder). The zinc content is 1.0 mass% to 10 mass% relative to the total weight of the polytetrafluorethylene resin composition, and the average particle size of the zinc powder is 5.0 μm to 80 μm.
C08K 3/30 - Sulfur-, selenium-, or tellurium-containing compounds
C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
F04B 39/00 - Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups
F16J 9/28 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials of non-metals
F16J 15/16 - Sealings between relatively-moving surfaces
F16J 15/3204 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
F16J 15/3284 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structureSelection of materials
A rolling bearing (100) supports a rotating shaft of a vehicle drive unit. The rolling bearing comprises: an inner race (10), an outer race (20), and a rolling element (30), all of which are steel and were subjected to quenching and tempering. The inner race, the outer race, and the rolling element respectively have rolling surfaces (10da, 20ca, 30a). The hardness of the rolling surface of at least one of the inner race, the outer race, and the rolling element is 865Hv to 1245Hv.
F16C 19/06 - 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 a single row of balls
Provided is a wheel bearing device in which, in a case when the wheel bearing device has a large size, the axial distance between multi-row rolling elements is set to an appropriate value, so as to make it possible to improve bearing rigidity. The wheel bearing device comprises: an outer member 24; an inner member composed of a hub ring 31 which has an inner raceway surface 29 and a wheel-mounting flange 25, and an inner ring 28 which is coupled to the hub ring 31 and which has an inner raceway surface 30 at an outer diameter portion; and double-row steel balls 32 which are accommodated between the raceway surfaces so as to be freely rollable. In a lateral-face cross-sectional view of the wheel bearing device, when the contact angle of an outer-side steel ball is denoted as θ1, and the contact angle of an inner-side steel ball is denoted as θ1, the distance f between a virtual straight line L1 extending from the center of the outer-side steel ball in the contact angle θ1 direction and an outer-side base portion 43 of a vehicle-body-mounting flange 23 satisfies f>0, and the distance g between a virtual straight line L2 extending from the center of the inner-side steel ball in the contact angle θ2 direction and an inner-side base portion 44 of the vehicle-body-mounting flange 23 satisfies g>0.
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
B60B 35/14 - Torque-transmitting axles composite or split, e.g. half-axlesCouplings between axle parts or sections
This determination method for determining the characteristics of a rotary machine includes a step for calculating a first spring constant between a rolling element (15) and a first raceway (11A), a step for calculating a second spring constant with respect to a second raceway (12A), a step for calculating a third spring constant of a first finite element model (11M), a step for calculating a fourth spring constant of a second finite element model (12M), a step for calculating the spring constant of a third finite element model (15M) on the basis of the first spring constant to the fourth spring constant, and a step for determining the characteristics of a rotary machine using the calculated spring constant of the third finite element model (15M).
A power supply device (1) comprises: a windmill (2) that has a windmill support column (14) and windmill blades (16); a power generator (4) that generates power by the rotation of the windmill (2); a container comprising the windmill (2) together with the power generator (4); and a linear motion guidance device (24) for installing the windmill (2) on a wall surface of the container (6) so as to be capable of vertical motion. The linear motion guidance device (24) has: a guide member (42) that extends in the vertical direction; and a slide member (44) that moves along the guide member (42). Moreover, a clearance adjustment member (26), which fixes the windmill (2) to the container (6) and adjusts the clearance between the windmill (2) and the container (6), is provided between the windmill (2) and the container (6).
This bearing condition monitoring system comprises: an operation condition determination means (2) that determines an operation condition of a bearing on the basis of external force detected by a sensor unit (1); a diagnostic speed setting means (3) that, when the bearing is determined to be in a light-load operation condition by the operation condition determination means (2), sets a detailed diagnostic speed on the basis of the rotation speed and vibration of the bearing detected by the sensor unit (1); and an abnormality diagnosis means (4) that changes the rotation speed of the bearing to the detailed diagnostic speed and performs detailed diagnosis of the bearing.
F16C 19/26 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
F16C 19/52 - Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
Provided are: a bearing retainer (a crown retainer) that is capable of handling high-speed rotation and that exhibits excellent strength at a weld; a mold for injection molding used in manufacturing the retainer; and a retainer manufacturing method employing the mold. A bearing retainer 1 is an injection molded body of a resin composition and is a crown retainer having, atop an annular retainer body, a plurality of pockets 3 that are open on one side in an axial direction and that each retain a ball. A weld line is formed on at least one pillar 4 among pillars located between the pockets 3, the weld line being convex on one side in a circumferential direction.
F16C 19/06 - 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 a single row of balls
A motor unit 1 comprising: a motor unit 2; a control unit 3 that controls the motor unit 2; bearings 20, 21 that rotatably support a motor rotating shaft 7 of the motor unit 2; a bearing holder 22 that holds the bearing 20, said bearing holder 22 being positioned between the motor unit 2 and the control unit 3; and a housing 4 in which the motor unit 2, the control unit 3, the bearings 20, 21, and the bearing holder 22 are accommodated, an insulative fluid being caused to flow into the motor unit 2. The bearing holder 22 has a through-hole 22e provided so that a space in the housing 4 on the motor-unit 2 side and a space in the housing 4 on the control-unit 3 side communicate, and a partition wall member 25 via which the space between the motor-unit 2 side and the space on the control-unit 3 side are closed off from each other is positioned in the through-hole 22e.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
Provided is a wheel bearing device that, while suppressing discrepancies in phase between a constant-velocity universal joint and a wheel bearing, can facilitate fitting of the constant-velocity universal joint into the wheel bearing. A spline-fittable concave section (3h) that extends in an axial direction is formed in an inner peripheral surface of a first hole (31) of a through-hole (3e). A convex section (24) that extends in the axial direction and is spline-fittable with the concave section (3h) is formed in an outer peripheral surface of a stem section (23) of the constant-velocity universal joint (20). The convex section (24) comprises a first convex section (25) that spline-fits closely with the entirety of the concave section (3h) and a second convex section (26) that is located on an outer side relative to the first convex section (25) and can spline-fit with the convex section (3h) with a gap therebetween in a radial direction, a circumferential direction, or both the radial direction and the circumferential direction. The second convex section (26) has a shape such that the external diameter, the width in the circumferential direction, or both the external diameter and the width in the circumferential direction become greater from one side in the axial direction to the other side.
B60B 35/14 - Torque-transmitting axles composite or split, e.g. half-axlesCouplings between axle parts or sections
B60B 35/18 - Torque-transmitting axles characterised by the arrangement of the bearings for the torque transmitting elements in the axle housings
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
The present invention addresses the problem of reducing the axial-direction size of a rotation sensor-equipped bearing in which a magnetic sensor and a magnet of a magnetic ring oppose one another at a position on one axial-direction side in relation to a rolling bearing, and the magnet is positioned on one axial-direction side in relation to the magnetic sensor. An outer ring (4), which is one bearing ring among an inner ring (3) and said outer ring (4) of a rolling bearing (1), comprises: a width surface (9a) positioned at the end on one axial-direction side from among two ends that define the width of the outer ring (4); and a notch section (18) that is indented toward the other axial-direction side from the width surface (9a). A magnetic sensor (15) is attached at the notch section (18).
F16C 19/16 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
The purpose of the present invention is to provide a wheel bearing device that makes it possible to suppress the formation of gaps in a flat surface of a crimped portion, improve the rigidity of the crimped portion, and increase the lifespan of the entire bearing device. This wheel bearing device(1) comprises: an outer ring (2); an inner member that has a hub ring (3) and inner rings (4A), (4B); and tapered rollers (5A), (5B) that are a plurality of rows of rolling bodies accommodated between the respective raceway surfaces of the inner member and an outer member so as to be capable of rolling. A crimped portion (3d) is provided to a protruding end of the hub ring (3). A stem portion (15) of an outer joint member (17) of a constant velocity universal joint (11) is inserted into the inner bore of the hub ring (3) and spline-fitted thereto. A flat surface (21) that abuts a shoulder portion (16) of the outer joint member (17) is provided to the crimped portion (3d) of the hub ring (3). The radial-direction outer surface (21a) of the flat surface (21) protrudes more to the shoulder portion (16) side of the outer joint member (17) in the axial direction than the radial-direction inner surface (21b) thereof.
B60B 35/14 - Torque-transmitting axles composite or split, e.g. half-axlesCouplings between axle parts or sections
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
Provided is a rolling bearing (1) in which a fitting surface (2b) to be fitted into a housing (10), which is a fixed side member, and a flank surface (2c) that divides the fitting surface (2b) across the entire width thereof and that faces an inner circumferential surface (10a) of the housing (10) with a larger radial clearance than the fitting surface (2b) are formed on an outer circumference of an outer ring (2). The flank surface (2c) is machined to have a roughness Ra of 5.0 μm or less.
F16C 19/06 - 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 a single row of balls
In this ball bearing with a seal, a retainer (10) in the ball bearing (1) to be used at a dmn value of 700,000 or higher is a crown-shaped retainer containing an engineered plastic, wherein: the diameter φx of a ball (5), the radius Ry of an inner peripheral surface of a pocket (11) in a cross-section passing through a pocket center (C) and including an axial center (O) of the bearing, and the diameter φz of the inner peripheral surface of the pocket (11) in a cross-section orthogonal at the pocket center (C) to a straight line passing through the pocket center (C) in a radial direction of the bearing have a relationship expressed by φx < 2Ry < φz; and a seal lip (21) provided on a seal member (20) can be brought into a fluid-lubricated state by an oil film formed between the seal lip and a seal sliding surface (B).
F16C 19/06 - 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 a single row of balls
F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
F16J 15/3204 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
F16J 15/3244 - Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with hydrodynamic pumping action
The present invention comprises a plurality of pocket wall parts (9) provided with recesses constituting pockets (2), two annular bodies (11) in which connecting plate parts (10) that link the pocket wall parts (9) to each other are alternately formed in a circumferential direction, a retainer (3) in which the plurality of pockets (2) are formed in the circumferential direction due to the two annular bodies (11) being made to face each other in the axial direction, an inner ring (5) having an inner ring raceway surface (4) formed in the outer peripheral surface thereof, an outer ring (7) that is provided to the outer peripheral side of the inner ring (5) and has an outer ring raceway surface (6) formed in the inner peripheral surface thereof, and a plurality of balls (8) that are provided so as to be interposed between the inner ring (5) and the outer ring (7) and are held by the pockets (2) formed in the retainer (3). In a state in which the balls (8) are in contact with the circumferential ends of the pockets (2), spherical parts (17) that are not in contact with the balls (8) are formed in the pocket wall parts (9).
F16C 19/04 - 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
Provided is a condition monitoring system that can be implemented as an inexpensive, small, and power-saving device with limited computational resources, and that can monitor and diagnose the status of an apparatus to be monitored with a relatively small amount of computation. A condition monitoring system (10) has a measurement data processing unit that calculates processed data from measurement data. The measurement data processing unit (11) executes: a subdivision step for subdividing time series data along a time series, which is measurement data, in the time direction; an FFT step for calculating spectral data by applying fast Fourier transform on each piece of subdivision data obtained by subdividing the time series data; a statistical step for extracting partial spectra of some bands from the spectral data and calculating statistics of the partial spectra; and an integration step for arranging the statistics in the chronological order of the original subdivision data to obtain the processed data.
A wheel bearing device for which the work of grinding a wheel hub is simplified. The wheel hub (3) has an inside track groove (3c), a seal land part (3d), a recess (3m), and a flange surface (3k). An outer-side sealing member (10) is provided with a core metal (11) and a sealing member (12). The sealing member includes a contact lip (12d) and a labyrinth lip (12e) facing the recess across a gap. The recess has a bottom (313) located between an outer diameter-side edge (311) and an inner diameter-side edge (312), and a tapered surface (314) that extends in the radial direction from the outer diameter-side edge toward the bottom and tilts toward one end of the axial direction going from the outer diameter-side edge toward the bottom.
In a parallel link mechanism, a distal end side link hub is coupled to a proximal end side link hub via three link mechanisms such that a posture of the distal end side link hub can be changed. Each link mechanism includes a proximal side end link member, a distal side end link member, and a center link member, and forms a quadric chain link mechanism composed of four revolute pairs. A singular point occurs when a central axis of the proximal or distal end side link hub and a central axis which is a rotation axis of a revolute pair section of the proximal or distal side end link member and the center link member coincide with each other. An axis angle of the center link member is specified such that a posture in which the singular point occurs is avoided.
Provided is a rolling bearing including rolling elements each having a chamfered portion at an axial end portion thereof. A portion at which an outer diameter surface and the chamfered portion of the rolling element intersect with each other has a peeling prevention structure. The peeling prevention structure is configured by forming the intersection portion as a continuous curve.
F16C 19/26 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
A steel rotating member (10, 20, 30) comprises a surface layer part (50) at a surface thereof. The steel contains carbon, silicon, manganese, chromium, molybdenum, vanadium, aluminum, phosphorus, sulfur, nitrogen, and oxygen, with the remainder being iron and unavoidable impurities. The surface layer part has been subjected to a nitriding process. In a first region of the surface layer part at a depth of not more than 5 μm from the surface, compressive residual stress is not less than 80 MPa. In a second region of the surface layer part at a depth of not more than 20 μm from the surface, the content of o nitrogen is 0.2-0.8 mass%, and the average particle size of martensite block particles at a comparative surface area rate of 30% is not more than 2.0 μm.
C21D 9/00 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor
C21D 9/28 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for plain shafts
C21D 9/32 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for gear wheels, worm wheels, or the like
C21D 9/36 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ballsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for rollers
C21D 9/40 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for ringsHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for bearing races
C22C 38/24 - Ferrous alloys, e.g. steel alloys containing chromium with vanadium
F16C 17/02 - Sliding-contact bearings for exclusively rotary movement for radial load only
F16C 19/06 - 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 a single row of balls
In a tapered roller bearing in which a segment holder divided into a plurality of segments in a circumference direction is used in an inner ring assembly, which is incorporated into an outer ring, guide claws are provided on an outer-diameter side of adjacent columnar portions of each pocket of a holder to allow the tapered rollers to be inserted into the pockets from an inner-diameter side of the segments. An engaging portion is provided on a large-diameter-side lateral-surface of a large-diameter-side arc-shaped portion of the segment. A connecting member, which is to be wound around on a large-diameter side of the segments arranged in a ring shape, is made to pass through the engaging portion, and ends of the connecting member are removably connected together by a fastening member, so that adjacent segments are butted together and fixed.
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
An electrically-driven oil pump device includes a pump that circulates oil, a motor that drives the pump, a control unit that drives the motor on the basis of the received command rotational speed, a current detection unit that detects a motor current flowing through the motor, and a rotation sensor that detects the rotational speed of the motor. When the current detection unit detects a motor current greater than or equal to a set value that has been set in advance on the basis of the relationship of the motor current with respect to the pressure (hydraulic pressure) of the oil, the control unit outputs a response rotational speed corresponding to the command rotational speed instead of the actual rotational speed detected by the rotation sensor.
F04B 49/20 - Control of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for in, or of interest apart from, groups by changing the driving speed
Provided is a method for obtaining the outer diameter, for example, of an annular workpiece W, wherein: in a state in which two outer support parts 3, 3 which are circumferentially spaced apart from each other on the radially outer side of the workpiece W in a flatly placed position are in contact with an outer peripheral surface Wa of the workpiece W, an outer detection terminal 6 and an inner detection terminal 7 which are arranged between the two outer support parts 3, 3 so as to be opposed to each other with the workpiece W therebetween and that have been zero-point calibrated are relatively moved closer together so as to be in contact with the outer circumferential surface Wa and an inner circumferential surface Wb, respectively, of the workpiece W, thereby measuring an amount of displacement δ1 from the zero point of the outer detection terminal 6 to the contact point of the outer detection terminal 6 with the outer circumferential surface Wa of the workpiece W, and an amount of displacement δ2 from the zero point of the inner detection terminal 7 to the contact point of the inner detection terminal 7 with the inner circumferential surface Wb of the workpiece W, and, on the basis of the amounts of displacement δ1, δ2, at least one of the outer diameter dimension, the inner diameter dimension, the outer diameter roundness, the inner diameter roundness, and the thickness of the workpiece W is calculated.
A clamping ring (6) includes: a ring main body (10) including a cut (13) formed in a part in a circumferential direction and a pair of circumferential-direction end portions (14a and 14b) opposed to each other across the cut (13); and bolt holes (11a and 11b) passing through the pair of circumferential-direction end portions (14a and 14b). The clamping ring (6) further includes a misalignment preventing part (16) configured to prevent misalignment of a center of gravity (CG) of the ring main body (10) from a center line (C1) of an inner peripheral surface (10a) of the ring main body (10).
A condition monitoring system includes a monitoring terminal, an acceleration sensor, and a data processor. The data processor calculates a diagnostic parameter from data measured by the acceleration sensor, determines a degree of damage to a bearing or a gear included in a wind turbine generator based on the diagnostic parameter, and controls the monitoring terminal to show information indicating a degree of suppression of electric power generated by the wind turbine generator in accordance with the degree of damage to the bearing or the gear.
In a parallel link mechanism, a distal end side link hub is coupled to a proximal end side link hub via three link mechanisms such that a posture of the distal end side link hub can be changed relative to the proximal end side link hub. Each link mechanism includes a proximal side end link member rotatably coupled at one end thereof to the proximal end side link hub, a distal side end link member rotatably coupled at one end thereof to the distal end side link hub, and a center link member rotatably coupled at both ends thereof to other ends of the proximal and distal side end link members via both revolute pair sections. The parallel link mechanism includes a rotation transmission mechanism configured to allow rotation of one revolute pair section to rotate the other revolute pair section in reverse.
Provided is an electric oil pump that can reduce a production time over conventional art and appropriately correct a rotation number. An electric oil pump (1) is provided with: a pump unit (2) that generates an oil pressure; a motor unit (3) that drives the pump unit (2); and a control unit (4) that controls the motor unit (3). The control unit (4) is provided with an estimated flow rate computation means (26) for computing an estimated flow rate of the pump unit (2) on the basis of a clearance, an oil temperature, a rotation number, a displacement volume, and a pressure of the pump unit (2), a theoretical flow rate computation means (27) for computing a theoretical flow rate of the pump unit (2) from the rotation number and the displacement volume, and a rotation number correction means (28) for adding a corrected rotation number calculated from the estimated flow rate to an indicated rotation number based on the theoretical flow rate.
F04C 14/00 - Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
F04C 2/10 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
F04C 14/08 - Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the rotational speed
Provided is a piston ring that has excellent wear resistance at high temperatures and causes minimal wear damage to a cylinder. The piston ring 1 is used in a reciprocating compressor and is made of a resin composition having, as a main component, an aromatic polyetherketone resin having a glass-transition temperature of 150°C or higher. The resin composition contains one or more types of carbon materials that have a sulfur atom content of 200 ppm or less. The resin composition contains 5-35 vol% of carbon materials with respect to the entire resin composition. The carbon materials include at least carbon fibers.
F16J 9/28 - Piston-rings, seats thereforRing sealings of similar construction in general characterised by the use of particular materials of non-metals
C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
C08L 73/00 - Compositions of macromolecular compounds obtained by reactions forming a linkage containing oxygen or oxygen and carbon in the main chain, not provided for in groups Compositions of derivatives of such polymers
A power generation system includes a wind power generation device, a control device, and a power supply target. In power generation system, control device performs power conversion to a power generated by wind power generation device, and supplies the converted power to a power supply target. Control device has a reference map for controlling a power conversion device of the control device. Reference map is a map indicating a relationship between an input voltage to the control device (power conversion device) and an output power from the control device (power conversion device). When a start condition is satisfied, control device executes correction control for correcting reference map, and searches for a point at which an output power of power generation system is maximized while shifting the output voltage of a generator by MPPT control. Control device corrects reference map on the basis of a result of the search.
A track groove 7 of an outer joint member 2 has a guide surface 71 for guiding balls 4. A chamfered section 30 which has an arc-shaped cross-sectional shape in a direction perpendicular to an axial direction is formed between a spherical inner circumferential surface 6 and the guide surface 71 of the outer joint member 2. The chamfered section 30 and the guide surface 71 of the outer joint member 2 are connected to an edge-like connection point E1, and the angle ε between the tangent line of the guide surface 71 and the tangent line of the chamfered section 30 at the connection point E1 is 0º<ε ≤15º.
F16D 3/223 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
F16D 3/224 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a sphere
F16D 3/2245 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a sphere where the groove centres are offset from the joint centre
Provided is a double-roller type tripod constant-velocity universal joint in which an outer ring 11 has a cylindrical outer circumferential surface 15. A pair of roller guide surfaces 6 of each track groove 5 are flat surfaces parallel to each other. A pair of guide surfaces 7 that can contact the outer ring 11 from both sides in the axial direction are provided on both sides of the roller guide surfaces 6 in the width direction. An inner ring 12 has a cylindrical inner circumferential surface 18. An outer circumferential surface 33 of a leg shaft 32 has a convex curve that bulges out on both sides in a torque transmission direction X in a longitudinal cross section and a transverse cross section. The distance between the convex curve (circular arc 33b) in the transverse cross section of the outer circumferential surface of the leg shaft 32 and the inner circumferential surface 18 of the inner ring 12 increases from an end in the X direction towards both sides in the Z direction. A radius r of curvature of the convex curve (circular arc 33a) in the longitudinal cross section of the outer circumferential surface of the leg shaft 32 is larger than a radius R of curvature of the convex curve (circular arc 33b) in the transverse cross section of the outer circumferential surface of the leg shaft 32.
F16D 3/205 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
85.
AUTOMATIC BALL INCORPORATION METHOD FOR CONSTANT-VELOCITY UNIVERSAL JOINT
Provided is an automatic ball assembly method for a constant-velocity universal joint 1, 201, said method being characterized in that: an inner assembly I, in which a spherical outer peripheral surface 8, 208 of an inner joint member 3, 203 is fit together with a spherical inner peripheral surface 13, 213 of a cage 5, 205, is fit together with a spherical inner peripheral surface 6, 206 of an outer joint member 2, 202; the respective axes of the cage 5, 205, the inner joint member 3, 203, and the outer joint member 2, 202 are disposed so as to substantially match; the axis of the inner joint member 3, 203 is caused to be inclined with respect to the axis of the outer joint member 2, 202 via an inclination lever 61; a ball 4, 204 is incorporated into a pocket 5a, 205a of the cage 5, 205 which is exposed at an opening end part of the outer joint member 2, 202; and, thereafter, in order to incorporate a ball 4, 204 into another pocket 5a, 205a of the cage 5, 205, when the inclination of the axis of the inner joint member 3, 203 is returned by the inclination lever 61, the cage 5, 205 is pushed in by a cage push-in mechanism 65.
F16D 3/20 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
B23P 21/00 - Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
F16D 3/2245 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a sphere where the groove centres are offset from the joint centre
Provided is a ball bearing that is capable of reducing an interference force between a retainer and a rolling body, which is due to the rolling body lead/lag resulting from a misalignment of inner and outer rings and that is capable of stabilizing, for example, the behavior of the retainer. A deep groove ball bearing (1) comprises: inner and outer rings (2, 3); a plurality of balls (4) which are interposed between the inner and outer rings (2, 3); and a wave-shaped steel plate retainer (5) which is for guiding a rolling body and which holds the balls (4). A circumferential-direction cross section and a radial-direction cross section which pass through the deepest point of a pocket (8) of the wave-shaped steel plate retainer (5) are each a curved surface in an arc shape. A point of contact between the pocket (8) and a ball (4) in the radial-direction cross section of the wave-shaped steel plate retainer (5) is positioned within a retainer pocket surface, and the radial-direction curvature radius of the retainer pocket surface is equal to or less than the circumferential-direction curvature radius of the retainer pocket surface.
F16C 33/42 - Ball cages made from wire or sheet-metal strips
F16C 19/06 - 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 a single row of balls
87.
BEARING DEVICE AND ELECTRIC VERTICAL TAKE-OFF AND LANDING AIRCRAFT
A first seal and a second seal seal an annular space between an outer ring and an inner ring by sandwiching a retainer. A stator including a coil is supported by the first seal and is opposed to a magnetic ring. A sensor, a wireless communication circuit, and a power supply circuit are supported by the second seal. A wire electrically connects the coil and the power supply circuit. The wire includes a part disposed in a groove extending in an axial direction of a bearing on an outer peripheral surface of the outer ring.
A rolling bearing includes a plurality of balls and two raceway members. The balls and the raceway members have contact surfaces. In at least either of balls and raceway members, a superficial part is formed in a region from the contact surface to a depth of 20 μm. Of the balls and the raceway members, the member in which a superficial part is formed in the contact surface is made of steel that has been quenched. A raceway surface which is a contact surface of the raceway member is a partial arc in a sectional view that passes a central axis of the rolling bearing and is parallel with the central axis. The diameter of the partial arc is greater than or equal to 1.01 times and less than or equal to 1.08 times the diameter of the ball.
F16C 33/51 - Cages for rollers or needles formed of unconnected members
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
A retainer (20) is used in a needle roller bearing (10) and is disposed on an outer circumference of an inner member (1) having an oil feed hole (32) that opens in a circumferential surface thereof, wherein: needle rollers (13) and the retainer (20) are lubricated by means of lubricating oil supplied from the oil feed hole (32); a diameter dw of the needle rollers (13) is φ1.5 to φ4; the retainer (20) is provided with a pair of annular portions (21, 21) and column portions (22) joining the pair of annular portions (21, 21) in an axial direction; and a gap CLa between the needle rollers (13) and a side surface of the column portions (22) is 0.02 to 0.08 times the diameter dw of the needle rollers 13.
A power generation system includes a rotating body, a generator, a brake circuit, a voltage sensor, and a control device. When rotation speed of the rotating body exceeds a first threshold, the control device executes a brake operation by the brake circuit. When a release condition determined based on at least one of a value of a generated voltage detected by the voltage sensor and the rotation speed of the rotating body is satisfied after the rotation speed of the rotating body is lower than the first threshold, the control device stops the brake operation by the brake circuit.
A windmill includes a shaft, a blade, and a supporting member. The windmill is rotatable about a center axis of the shaft. The blade has a blade main body portion extending along an axial direction that is a direction of the center axis. When viewed in a cross sectional view orthogonal to the axial direction, the blade main body portion includes a front edge and a rear edge, the front edge being an end on a front side in a rotation direction of the windmill, the rear edge being an end on a rear side in the rotation direction. The supporting member extends along a radial direction orthogonal to the axis direction and passing through the center axis, so as to connect the shaft and the blade main body portion to each other.
This assembling device comprises a phase matching device 20 that subjects a cassette 11, which is obtained by fitting together an inside joint member 3 and a retainer 5 in a manner allowing relative rotation around the center axis Oi of the inside joint member 3, to phase matching in which the circumferential direction locations of an inside track groove 9 of the inside joint member 3 and a pocket 10 of the retainer 5 are made to match. The phase matching device 20 has a pair of moving bodies 23 that move synchronously in opposite directions from one another, and each moving body 23, while in a condition in which a (protrusion 24 that is provided to a) tip section thereof has been inserted into the pocket 10, slides along a direction orthogonally intersecting an axis-parallel plane P that includes the center axis Oi, treating said plane P as a reference.
B23P 21/00 - Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
F16D 3/20 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
F16D 3/2245 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines of each coupling part lying on a sphere where the groove centres are offset from the joint centre
A segment 10 is an injection molded product of a resin material that integrally comprises a plurality of column portions 13 arranged spaced apart in a circumferential direction, a pair of arcuate portions 11, 12 which are arranged spaced apart in an axial direction and which are linked by way of the plurality of column portions 13, and claw portions 15, 16 provided on the column portions 13, wherein a circumferential angle θ corresponding to a circumferential dimension of the segment 10 is at least equal to 5° and at most equal to 30°.
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
Provided is a tapered roller bearing with which it is possible to remove a connecting member such as a wire after bearing installation, even if an inner ring assembly is integrated by the connecting member, and which can achieve roller guidance. This tapered roller bearing (1) comprises a detachable fall-out prevention member (32) that prevents radially-outward falling out of a tapered roller (15) accommodated in a pocket (16) having a first guide pawl extending to the inner diameter side of a retainer segment (20). The fall-out prevention member (32) engages with an outer diameter surface and a large-diameter side surface of a large-diameter side arc-shaped part (22) of the retainer segment (20). The retainer segment (20) and the fall-out prevention member (32) are connected by a connecting member (25).
In a tripod type constant velocity universal joint 1 of a double roller type, R/PCD≥0.0850 and t/PCD≥0.145, where PCD is a pitch circle diameter of a roller guide surface 6 of an outer joint member 2. R is a radius of curvature at an intermediate portion between a body portion 31 and a leg shaft 32 of a tripod member 3, and t is a minimum distance from a large-diameter portion 34a of a spline 34 of the tripod member 3 to an intermediate portion 33.
F16D 3/205 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
A tapered roller bearing (1) includes an inner wheel and an outer wheel (11, 12); a plurality of tapered rollers (15) interposed between the inner wheel and the outer wheel (11, 12); and a holder (17) that holds the tapered rollers (15). The holder (17) includes a plurality of holder segments (20) arranged in a ring shape. The holder segments (20) each have a pocket for holding a predetermined number of the tapered rollers (15). The holder segments (20) are each equipped with a plurality of pillar sections extending in an axial direction, and a pair of connecting sections that extend in a circumferential direction to connect the plurality of pillar sections together. A protrusion (29) protruding radially outward and extending in the circumferential direction is provided at both ends of the holder segments (20) in the axial direction thereof. The protrusions (29) each have a guide surface (29a) that is guided by an outer raceway surface (14).
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
F16C 33/36 - RollersNeedles with bearing-surfaces other than cylindrical, e.g. taperedRollersNeedles with grooves in the bearing surfaces
A holder segment (20) of a tapered roller bearing comprises: a plurality of columnar parts (23) extending in the axial direction; and a pair of arc parts (21, 22) extending in the circumferential direction and linking the respective columnar parts (23). The plurality of columnar parts (23) and the pair of arc parts (21, 22) form pockets (16) that hold tapered rollers between adjacent columnar parts (23, 23). In the arc parts (21, 22) or the columnar parts (23), surfaces (sf) forming the pockets (16) are inclined with respect to the radial direction in the pockets (16) of the holder segment (20). All or a portion of corner portions (Cr) in each of the pockets (16) has a roundness shape that gradually becomes larger toward one side or the other side in the radial direction.
F16C 19/36 - Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
An outer joint member and a hub wheel are coupled to be able to transmit torque by meshing face splines respectively provided and applying a tightening force in an axial direction between both the face splines. Shapes of tooth surfaces of the face splines are determined such that, when bringing the face splines close to each other in the axial direction and meshing them with each other, tooth surfaces of the face splines first come into contact with each other in, among an outer diameter portion of a meshing region between both the face splines, an inner diameter portion, and an intermediate portion sandwiched between the outer diameter portion and the inner diameter portion, one of the outer and inner diameter portions, and then the tooth surfaces of both the face splines come into contact with each other in the other of the outer and inner diameter portions.
F16C 19/18 - Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
F16D 1/06 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
F16D 3/16 - Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
100.
CELL TISSUE PRODUCTION METHOD, CELL TISSUE PRODUCTION SET, AND CULTIVATION CONTAINER CONTAINING CELL TISSUE PRODUCED BY SAID PRODUCTION METHOD
This cellular tissue production method can produce a cellular tissue with high density and high shape retainability while the cell viability is maintained, and includes: a first application step of applying a first application liquid to an application target; and a second application step of applying and layering a second application liquid onto the first application liquid applied in the first application step, wherein the second application step includes subjecting an interface between the first application liquid and the second application liquid to gelation while the first application liquid is kept fluid.
