An electric drive module (EDM) configured to generate and transfer drive torque to a driveline for propulsion of an electric vehicle. The EDM includes a gearbox assembly, an electric motor having a rotor and a stator, and a thermal management system. The thermal management system includes a fluid circuit configured to supply a fluid to the gearbox assembly, the rotor, and the stator, and a pump configured to direct the fluid through the fluid circuit. A valve is disposed on the fluid circuit and configured to selectively move between (i) a closed position where the fluid is not supplied to the stator, and (ii) an open position where the fluid is supplied to the stator for cooling thereof.

A motor unit includes a motor including a rotor to rotate about a motor axis, and a stator radially outside of the rotor, a reduction gear connected to the motor, a differential connected to the motor through the reduction gear, a housing including a housing space to house the motor, the reduction gear, and the differential, and an oil passage to lead an oil to the motor. The oil passage includes an electric pump and a cooler. The electric pump and the cooler are fixed to the housing. The electric pump includes a portion located vertically below the cooler.

The disclosed left-right wheel drive device (30) includes first tubular surface portions (21), second tubular surface portions (22), and third tubular surface portions (23). The first tubular surface portion (21) is formed into a tubular surface shape along an outer circumference of a driven gear (8). The second tubular surface portion (22) is formed into a tubular surface shape along an outer circumference of a first counter gear (4). The third tubular surface portion (23) is formed into a tubular surface shape along an outer circumference of the first counter gear (4). The upper surface portion (24) is formed into a surface shape connected to an upper end of the third tubular surface portion (23), is arranged over the first bearing (23), and includes a first oil hole (25) that supplies lubricant to the first bearing (27).

An electric drive assembly with oil/water dual cooling is provided that includes a motor module, a gearbox module, a water cooling module and an oil cooling module. Lubricating oil is introduced into the front and rear windings of the motor through three oil conveying passages to improve the cooling performance of the motor. Moreover, the gearbox cavity and the motor cavity do not need to be sealed, which avoids the use of high-speed oil seal of motor shaft, and thus the cost of the drive assembly is reduced and the transmission efficiency is improved. The cooling fluid of the motor cools the lubricating oil through the heat exchanger of the gearbox, thereby solving the heat dissipation problem when the gearbox of the new energy vehicle operates at high speed constantly, and thus improving the service life and reliability of the gear and bearing.

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 gearbox assembly includes a gearbox having a gear assembly and a gutter for collecting a gearbox lubricant scavenge flow from the gearbox. The gutter is characterized by a lubricant extraction volume ratio between 0.01 and 0.3, inclusive of the endpoints. The lubricant extraction volume ratio is defined by

[00001]$\frac{V_G}{V_{GB}}.V_G$ is a gutter volume of the gutter and V.sub.GB is a gearbox volume. A gas turbine engine includes the gearbox assembly and a lubrication system. The lubrication system includes a sump that is a primary reservoir having a first lubricant level and a secondary reservoir in the gearbox assembly. The secondary reservoir has a second lubricant level. The lubrication system fills the secondary reservoir with a lubricant between the first lubricant level and the second lubricant level. The gear assembly collects the lubricant in the secondary reservoir to supply the lubricant to the gear assembly.

A worm reducer 1, in which at least one of an upper surface part or a lower surface part of a housing includes a protruding part 20 protruding toward a worm wheel 60; and with respect to an imaginary line L1 extending parallel to the rotation axis C2 of a worm gear 50 and passing through the central axis of a shaft 71 in the housing, a protruding part 20 is provided between an imaginary line L1 and a meshing part E between the worm gear 50 and the worm wheel 60 in a plan view, and includes an inclined part 21 that inclines toward the meshing part E.

An eAxle having a housing, an electric motor supported by the housing, a differential coupled to the electric motor and supported by the housing, a source of pressurized oil, and an oil feed line coupled to the source of pressurized oil. The housing includes an inlet configured to supply oil from the oil feed line to an interior of the housing and the differential.

An eAxle having a housing, an electric motor supported by the housing, a differential coupled to the electric motor and supported by the housing, a source of pressurized oil, and an oil feed line coupled to the source of pressurized oil. The housing includes an inlet configured to supply oil from the oil feed line to an interior of the housing and the differential.

An oil distributor includes a top surface and a bottom surface opposite to each other, and a side surface located between the top surface and the bottom surface. The top surface, the bottom surface, and the side surface form an oil distribution chamber. The top surface is provided with an oil inlet hole, which is communicated with an oil inlet pipeline in an external oil passage. The side surface is provided with at least one oil outlet, which is communicated with a lubrication pipeline. The bottom surface is disposed at a through hole of a housing of the reducer, and the bottom surface is provided with an oil distribution pipe located inside the housing of the reducer. The oil distribution pipe is provided with at least one oil spraying hole, and the oil spraying hole is communicated with an interior of the housing of the reducer.