A strain wave gear system (10) includes first and second sets of ball bearings (80, 82) located intermediate a flange (84) and a retainer plate (88) rotatable with an output (54) and a radially oriented flat disc (74) of the input including strain relief (76). Strain relief (76) is a helical slot in a coupling (70) located radially within the wave generator (94) and the ring gear (22). The ring gear (22) is sealed by a sealing system including sealant (42) forced by a protrusion (34) of the cap (24) entering into a cavity (36) through a channel (40) into a relief volume (38) of the housing (12). The bearing (48) rotatably mounting the housing (12) to the output (54) is lubricated by a lubricating system including plungers (110) threadably received in axial bores (102) intersecting with radial bores (104) in communication with radial holes (47) of the bearing (48).

This disclosure details transmission systems for electrified vehicles. Exemplary transmission systems may include a crankshaft integrated starter-generator. The crankshaft integrated starter-generator may include an electric machine and an integrated rotor carrier/input shaft assembly. The integrated rotor carrier/input shaft assembly is configured to support the electric machine and provide an interface for mounting the crankshaft integrated starter-generator relative to a torque converter. The torque converter may be mounted to a flange of the integrated rotor carrier/input shaft assembly that is inside the diameter of a rotor of the electric machine.

A power steering device includes a bearing rotatably supporting the tip side of a worm shaft, a gear case provided with the housing hole for housing the worm shaft and a holder housing the bearing. The holder includes a first holder holding the bearing, a second holder having the guide part configured to guide a movement of the second bearing toward a worm wheel, and a spring provided in a compressed state between the first holder and the second holder and configured to bias the first holder toward the worm wheel. The second holder includes a holder opening part configured to allow the bearing and the first holder to pass through thereof in the guiding direction of the guide part to guide the bearing, and the first holder faces an inner peripheral surface of the housing hole through the holder opening part.

A gear unit includes: a first gear and a second gear which are disposed about a first axis; an input shaft disposed so as to be rotatable about the first axis; and an intermediate gear disposed between the first gear and the second gear. The intermediate gear is disposed about a second axis tilted with respect to the first axis. The intermediate gear includes an inner ring portion and an outer ring portion disposed so as to be rotatable relative to the inner ring portion. The inner ring portion is configured to be rotated with rotation of the input shaft. The outer ring portion is configured to mesh with the first gear and the second gear.

A power transmission device configured to transmit a power inputted thereto from a motor to a wheel is disclosed. The power transmission device includes a first support member, a first gear, a second support member attached to the first support member, a second gear, and an adjustment mechanism. The first gear is supported by the first support member, and configured to rotate about a first axis. The second gear is supported by the second support member, meshed with the first gear, and configured to rotate about a second axis. The second axis is approachable to and separable from the first axis. The adjustment mechanism is configured to adjust a distance between the first axis and the second axis.

The present invention provides a method for manufacturing a variable speed accelerator including: a preparation step of preparing a variable speed electric motor 71 including a variable speed rotor 72 in which a shaft insertion hole 74 extending in a horizontal direction is formed, a first variable speed rotor bearing 85i and a second variable speed rotor bearing 85o that rotatably support the variable speed rotor 72 by aligning an axial direction of the variable speed rotor 72 in the horizontal direction, and a variable speed stator 86 that surrounds the variable speed rotor 72 from an outer circumferential side; and a shaft insertion step of inserting a constant speed shaft 77 into the shaft insertion hole 74 of the variable speed rotor 72 in the horizontal direction so as to penetrate the variable speed rotor 72 after the preparation step.

An axle system (150) for a vehicle comprises: a differential unit (10) including a first housing (24) and a second housing (20) which rotationally receives at least part of said first housing; at least one drive shaft (11) having one end configured to be connected to a wheel of the vehicle and one end connected to the differential unit (10) and rotationally received in the first housing (24), the drive shaft (11) including at least one joint (110) connecting two portions (114a, 114d) of the drive shaft (11) to transmit rotary motion between said portions; a first bearing (30) secured around the drive shaft (11), placed between the drive shaft and the first housing (24), having an outer diameter (D30) smaller than the radial dimension (D) of the joint (110); a second bearing (40) placed between the first housing (24) and the second housing (20); at least one tightening member (50) to axially lock the first bearing outer ring (32) relative to the first housing (24). The tightening member comprises at least one manoeuvring portion (51) which is arranged in an offset relation relative to the joint (110), when looking axially towards the differential unit (10), so that the tightening member manoeuvring portion (51) is visible and accessible, at least during a tightening phase of an axle system mounting process.

A strain wave gear system (10) includes first and second sets of ball bearings (80, 82) located intermediate a flange (84) and a retainer plate (88) rotatable with an output (54) and a radially oriented flat disc (74) of the input including strain relief (76). Strain relief (76) is a helical slot in a coupling (70) located radially within the wave generator (94) and the ring gear (22). The ring gear (22) is sealed by a sealing system including sealant (42) forced by a protrusion (34) of the cap (24) entering into a cavity (36) through a channel (40) into a relief volume (38) of the housing (12). The bearing (48) rotatably mounting the housing (12) to the output (54) is lubricated by a lubricating system including plungers (110) threadably received in axial bores (102) intersecting with radial bores (104) in communication with radial holes (47) of the bearing (48).

A strain wave gear system (10) includes first and second sets of ball bearings (80, 82) located intermediate a flange (84) and a retainer plate (88) rotatable with an output (54) and a radially oriented flat disc (74) of the input including strain relief (76). Strain relief (76) is a helical slot in a coupling (70) located radially within the wave generator (94) and the ring gear (22). The ring gear (22) is sealed by a sealing system including sealant (42) forced by a protrusion (34) of the cap (24) entering into a cavity (36) through a channel (40) into a relief volume (38) of the housing (12). The bearing (48) rotatably mounting the housing (12) to the output (54) is lubricated by a lubricating system including plungers (110) threadably received in axial bores (102) intersecting with radial bores (104) in communication with radial holes (47) of the bearing (48).

A power steering assembly is provided. The power steering assembly may include a housing, a first bearing, a second bearing, a worm, and a worm gear. The first bearing is disposed within the housing and defines a first central axis. The second bearing is disposed within the housing and defines a second central axis offset from the first central axis. The first bearing and the second bearing are arranged with the housing such that the second bearing is movable to align the first central axis with the second central axis responsive to a load applied to the second bearing.