Abstract

This assembly comprises a drive shaft, which is rotatable about a drive axis, and a sliding connection module, the drive shaft comprising: - a driving end portion; - a connecting end portion drivingly connected to the connection module; and - a breakable portion which joins the driving and connecting end portions, and is adapted to break beyond a predetermined torque, the connection module comprising a connection casing which receives the connecting end portion so that it slidable along the drive axis and is coupled to the connection module in rotation, and a guide sleeve comprising a guide ring which guides the driving end portion in rotation and in translation. The guide sleeve further comprises at least a rolling bearing which is adapted to guide the driving end portion of the drive shaft in rotation and in translation. The guide ring is expandable between an initial retracted state of small internal diameter and a dilated state of larger internal diameter, the internal diameter of the rolling bearings being greater than the internal diameter of the guide ring in its retracted state and smaller than the internal diameter of the guide ring in its dilated state.

IPC Classes  ?

• F16C 27/06 - Elastic or yielding bearings or bearing supports, for exclusively rotary movement by means of parts of rubber or like materials
• F16C 39/02 - Relieving load on bearings using mechanical means
• B61C 9/10 - Transmission systems in or for locomotives or motor railcars with IC reciprocating-piston engines mechanical
• B61C 9/00 - Locomotives or motor railcars characterised by the type of transmission system usedTransmission systems specially adapted for locomotives or motor railcars
• F16D 3/06 - Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
• F16D 9/08 - Couplings with safety member for disconnecting by breaking due to shear stress over a single area encircling the axis of rotation, e.g. shear necks on shafts

Abstract

A homokinetic joint is described that comprises a male member with several arms, a female member for receiving the male member, a roller mounted and freely rotating on each arm, a spring provided between the male member and the female member and for urging the male member away from the female member, and a cup provided between the spring and the male member. The cup includes a skirt comprising an outer surface designed to contact at least one of the rollers when the joint is in a separated state.

IPC Classes  ?

• 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

Abstract

This female element for a constant-velocity joint extends about a female central axis (A-A) and comprises a pair of races (16) that extend symmetrically about a central plane (M-M) and that define a radial zone (30) having a reference plane (P1). The element comprises a race end wall (32) having an outer end wall surface (36). The female element defines in each reference plane (P1 ) a wall thickness Em. Each of the races (16) is at a centre distance DM from the central plane and comprises a closed end (16F). The outer end wall surface (36) lies, in the reference plane (P1 ), exclusively in a preferred zone (ZP1 ). The preferred zone is defined by an annular half-disc of minimum radius r = DM and maximum radius R = (DM. + Em.) x 1.9. The centre Cr of the radius r is situated at the intersection between the central plane and the closed ends. Applicable to constant-velocity joints for motor vehicle transmissions.

IPC Classes  ?

• 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

Abstract

This shaft assembly comprises a shaft (4) defining a central axis (X-X) and having a centre portion (10) and two end portions (12), a first joint (6) comprising a male member (14) and a first female member (16) complementary to the first male member (14), the first male member (14) being mounted onto a first of the two end portions, first axial fixing means (30, 50) fixing the first male member (14) on the shaft in the axial direction with respect to the central axis. The shaft assembly further comprises shaft spring means (50) adapted to urge the shaft towards a predetermined position with respect to the first female member. Application to drive trains of low cost vehicles.

IPC Classes  ?

• 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

Abstract

The invention relates to a transmission shaft including a annular fixation groove (10) and characterised in that the fixation groove (10) has a cross section containing a bottom portion (20) having a bottom radius (R1) and at least a first side portion (22) having a first side radius (R2). The bottom radius (R1) is larger than the first side radius (R2). Application in homokinetic joints.

IPC Classes  ?

• F16D 3/84 - Shrouds, e.g. casings, coversSealing means specially adapted therefor

Abstract

The invention relates to a homokinetic joint (1) that comprises a male member (2) with several arms (6), a female member (12) for receiving the male member (2), a roller (24) mounted and freely rotating on each arm (6), a spring (31) provided between the male member (2) and the female member (12) and for urging the male member (2) away from the female member (12), and a cup (34) provided between the spring (31) and the male member (3). The cup (34) includes a skirt (44) comprising an outer surface (46) designed to contact at least one of said rollers (24) when the joint is in the separated state. Application in homokinetic joints for automotive vehicles.

IPC Classes  ?

• 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

Abstract

This assembly comprises a shaft (4), a hub (6), first main splines (10), second main splines (12) defining a pitch circle (30) and second main generatrices (26), and indexing means. The indexing means comprise secondary splines (16), having a first secondary profile (16A) extending radially between the pitch circle (30) and the second main generatrix (26). The first secondary profile (16A) is convex or concave and during the assembly forms a point-form contact with a second secondary profile (36A). The invention can be applied to fastening a tripod of a constant velocity joint to a shaft.

IPC Classes  ?

• F16D 1/116 - Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts including a continuous or interrupted circumferential groove in the surface of one of the coupling parts

Abstract

A shaft includes endpieces welded to a tube shaft. The endpieces include a central axis; a first portion having a first end that is a connection end; and a second portion that is tubular and that is adapted to be welded to the tube. The second axial portion defines a second free end and has an outer surface, an inner surface, and an end-wall surface defined by an end-wall generatrix. The inner surface is of a shape that flares towards the second free end and is defined by an inner generatrix different from the end-wall generatrix. The endpiece is applicable to transmission shafts in motor vehicles.

IPC Classes  ?

• F16D 1/068 - 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 non-disconnectable involving gluing, welding or the like

Abstract

The invention concerns a universal joint cross piece comprising a hub (12), two pins each of which comprises two spindles (14), and two lubricating channels (22), each of which extends from an input (24) to an output (26) located at the end of the spindle (14). The four lubricating channels (22) are independent and separated from one another over the entire respective length between their input and their output. The cross piece comprises for each of the inputs (24) a cross piece lubricator (28) arranged on the hub (12). The invention is applicable to universal joint cross piece on drive trains.

IPC Classes  ?

• F16N 1/00 - Constructional modifications of parts of machines or apparatus for the purpose of lubrication
• F16N 7/38 - Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pumpCentral lubrication systems
• F16N 11/08 - Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricatedGrease cups with mechanical drive, other than directly by springs or weights
• F16D 3/32 - Hooke's joints or other joints with an equivalent intermediate member to which each coupling part is pivotally or slideably connected in which the coupling is specially adapted to constant velocity-ratio by the provision of two intermediate members each having two relatively- perpendicular trunnions or bearings

Abstract

The invention concerns a safety module for transmission comprising two bearings, a connecting pin adapted to be supported by the two bearings. The module comprises two connecting flanges (30 32) each of which bears one of the two bearings (38, 40), and means for releasable fixing (34) of the two connecting flanges (30, 32) fixing the two connecting flanges (30, 32) together. The connecting pin (36) and the two bearings (38, 40) are adapted to enable the two connecting flanges to be rotated relative to each other after the cleavable fixing means have been released. The invention is applicable to power drive trains in motor or railway vehicles.

IPC Classes  ?

• F16D 9/08 - Couplings with safety member for disconnecting by breaking due to shear stress over a single area encircling the axis of rotation, e.g. shear necks on shafts
• F16D 3/202 - 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
• B60K 17/22 - Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft