An electric drive unit for a wheel of a motor vehicle, including an electric motor for driving a drive shaft joined to the wheel in a manner resistant to rotation. The drive shaft is disposed coaxial to the rotor of the electric motor and is joined thereto in a rotation-resistant manner. The drive shaft is joined to the rotor of the electric motor in a rotation-resistant and axially moveable manner via a bearing.

A rolling element shaft assembly includes a solid shaft having a first end and a second end, a tubular shaft configured to receive the shaft first end, and a bearing sleeve coupled to the solid shaft. The bearing sleeve includes a first portion defining a first edge, a second edge, and at least one first bearing aperture, and a second portion defining a third edge, a fourth edge, and at least one second bearing aperture. The first portion is configured to couple to the second portion about the solid shaft. The bearing sleeve further includes at least one first bearing disposed within the at least one first bearing aperture and at least one second bearing disposed within the at least one second bearing aperture.

A telescopic shaft is provided. The telescopic shaft includes a first shaft including a first coupler having an inner circumferential surface including an external straight groove and an external inclination groove formed thereon, the external straight groove having a semi-circular cross section and being formed in parallel to a rotation axis and the external inclination groove having a semi-circular cross section, being inclined with respect to the external straight groove at a predetermined angle, and being shaped like a spiral, a second shaft including a second coupler inserted into the first coupler and having an outer circumferential surface including an internal straight groove and an internal inclination groove formed thereon, the internal straight groove having a semi-circular cross section and corresponding to the external straight groove and the internal inclination groove having a semi-circular cross section, being inclined in an opposite direction to the external inclination groove at a predetermined angle with respect to the internal straight groove, and being shaped like a spiral, and a plurality of balls arranged in a line in an axial direction between the external straight groove and the internal straight groove, one ball being arranged between the external inclination groove and the internal inclination groove, wherein the first shaft and the second shaft are coupled to extend and retract in an axial direction, thereby preventing play from occurring in a circumferential direction and preventing separation of balls.

A steering shaft for a motor vehicle includes a hollow outer shaft with a longitudinal axis. An inner shaft is arranged coaxially within the outer shaft. The inner shaft telescopes longitudinally relative to the outer shaft and is connected in a torque-transmitting manner to the outer shaft via a rolling body. The rolling body can roll in the direction of the longitudinal axis and the rolling body bearing in a positively locking manner in the circumferential direction about the longitudinal axis between rolling body raceways on the inner and outer shaft. The steering shaft includes a securing element with a supporting body arranged between supporting faces configured on the inner shaft and on the outer shaft, which at least one supporting body can be supported in a positively locking manner in the circumferential direction. The supporting body is spaced apart in the circumferential direction from the supporting faces.

The present invention relates to a sliding cage of universal joint for vehicle, and more particularly, to a sliding cage of universal joint for vehicle for making a shaft joint and a pipe joint smoothly slide as well as operating an elastically contacted needle bearing, installed to the sliding cage, when a universal joint is slipped or delivers rotating torque.

The present invention provides a sliding cage of universal joint for vehicle, comprising: a sleeve; a plurality of mountings positioned to keep distance along the longitudinal direction of the outer side of the sleeve; and a needle bearing and a ball bearing which are installed to the mountings, wherein the sliding cage is provided to the universal joint constructing a steering apparatus for vehicle, thereby being assembled to deliver torque while being slipped toward axial direction.

A double-offset plunging type constant velocity universal joint includes inner and outer joint members each having six linear track grooves extending along an axial direction. The inner joint member has a coupling hole at a center portion thereof for coupling a shaft. Six torque transmission balls retained by a cage are incorporated between the linear track grooves of the inner and outer joint members. A ratio T.sub.CAGE/D.sub.BALL of a minimum thickness (T.sub.CAGE) of the cage to a diameter of the torque transmission ball (D.sub.BALL) is from 0.225 to 0.245, wherein a ratio D.sub.BALL/D.sub.S of a diameter (D.sub.BALL) of the torque transmission ball to a spline large diameter (D.sub.S) of the coupling hole of the inner joint member is from 0.79 to 0.85, and wherein a ball contact ratio (ψ) of the torque transmission ball is from 1.08 to 1.12.

A steering shaft assembly comprising female shaft and a male shaft. The female shaft includes an inner surface defining a plurality of outer roller bearing tracks. The male shaft includes an outer surface defining a plurality of inner roller bearing tracks. An adaptable sleeve assembly is located between the inner surface of the female shaft and the outer surface of the male shaft and includes a body. The body defines an outer surface for contacting the inner surface of the female shaft and an inner surface for contacting the outer surface of the male shaft. The body defines at least one rib projecting radially outwardly from the outer surface of the body and projecting radially inwardly from the inner surface of the body. The at least one rib is inserted into one of the plurality of inner roller bearing tracks and one of the plurality of outer roller bearing tracks.

A bearing device for motor vehicle shafts is described, in particular for motor vehicle steering shafts. The bearing device is provided for torque transmission between an inner shaft and the hollow shaft surrounded by the inner shaft. The inner shaft and the hollow shaft each have opposing bearing grooves, in which rolling elements are received. At least one positive locking cam in radial direction is provided. A safety contour is assigned to the positive locking cam, the safety contour comprising two engagement positions for the positive locking cam. In the case of unoccupied bearing grooves the positive locking cam is rotationally movable along the safety contour between the engagement points during a torque transmission, in a manner that a defined relative movement between the inner shaft and the hollow shaft is possible, which generates both tactile feedback and acoustic feedback. Furthermore, an automotive shaft assembly is described.

A plunging assembly of a driveshaft includes: an outer housing having a bore having a plurality of outer ball grooves extending in a longitudinal direction; an inner shaft being disposed to be able to undergo relative movement in the longitudinal direction in the bore of the outer housing and having a plurality of inner ball grooves that are paired respectively with the outer ball grooves to form a plurality of ball tracks; a plunging unit connecting the outer housing and the inner shaft to allow a plunging motion and a rotational power transmission between the outer housing and the inner shaft; and a stopper that is provided in the bore of the outer housing to limit relative movement of the inner housing and the inner shaft in a direction in which the inner shaft is inserted into the bore. The outer housing has a mounting hole communicating with the bore, and the stopper is a plug member that is inserted into the mounting hole in a state that a frontal end portion thereof is exposed to the bore.

The present invention relates to a joint assembly for a driveshaft comprising, a yoke stub (1) with multiple channels (3) in the direction of extension; a tube sleeve (2) is having a recess (4) aligned corresponding channel (3) and telescopically engaged with a yoke stub (1). The driveshaft further comprises multiple rollers (14) spaced apart from each other in such a way that providing axial movement between the channel (3) and the corresponding recess (4) to transmit torque and a cage (12) extending between the rollers (14) to secure them together.