A drive device includes a first shaft, a gear portion, a lubricant flow path, and a housing. A gear portion having a second shaft is connected to an end portion of the first shaft in the axial direction. A side plate portion of the housing separates a motor tubular portion surrounding a motor accommodation portion that accommodates a rotor and a stator and a gear tubular portion surrounding a gear accommodation portion that accommodates the gear portion. First and second bearing holding portions disposed in the side plate portion rotatably support the first and second shafts via the first and second bearings, respectively. A lubricant supply portion that is disposed radially outward of the stator and supplies lubricant to the stator includes a lubricant flow path through which lubricant can flow. The lubricant flow path is connected to at least one of the first and second bearing holding portions.

An electrically-operated electric drive module for use in a vehicle framework that is configured for a powertrain that includes an internal combustion engine. The electrically-operated electric drive module permits the vehicle to be converted to an electrically propelled vehicle in a manner that is cost-effective and which is relatively low in weight.

An automotive axle includes a housing including gears and a bath lubricating the gears, the bath including gear oil and about 0.1 to 5 wt. % secondary alcohol ethoxylate based on total weight of the bath such that during automotive operation at temperatures less than a threshold, reverse micelles form to trap air bubbles in the bath, emulsifying the bath, and at temperatures greater than the threshold, the reverse micelles dissipate.

An electric drive apparatus includes a rotating electric machine and a transmission. The rotating electric machine includes a rotor, a stator and a first housing. The transmission includes a motive power transmitting unit, a second housing provided integrally with the first housing, and lubricating oil provided in the second housing to lubricate the motive power transmitting unit. The stator includes a stator coil that has first and second coil end parts respectively protruding from first and second axial end faces of a stator core. Each of phase windings of the stator coil has turn portions included in the first coil end part and joints included in the second coil end part. The second coil end part is located on the same axial side of the stator core as the transmission whereas the first coil end part is located on the opposite axial side of the stator core to the transmission.

Drivetrain systems and methods are provided. In one example, the drivetrain system includes an interaxle differential (IAD) configured to receive power from a prime mover, a motor configured to drive a planetary gearset, and a ball ramp actuator configured to selectively engage a plurality of plates in a clutch pack of a friction clutch in response to receiving rotational input from the planetary gearset. In an engaged configuration, the friction clutch prevents speed differentiation between a first IAD output and a second IAD output.

Methods and systems are provided for adjusting a lubrication system based on an axle configuration of a tandem axle with a disconnect feature. In one example, a method may include adjusting an oil level in an axle sump of a tandem axle based on an axle configuration of the tandem axle (e.g., whether the tandem axle is operating with one of a 6×4 axle configuration and a 6×2 axle configuration), the axle sump selectably coupled to an external reservoir via a first passage and a second passage, the first passage including an electric pump, the second passage including a valve, and the tandem axle coupled to a drivetrain of a motor vehicle. In this way, an amount of oil in the axle sump may be adjusted based on the tandem axle configuration.

A power transmission device includes a motor, a planetary gear mechanism having a portion that overlaps the motor in an axial direction, an axial direction wall part having a portion positioned between the planetary gear mechanism and the motor, a plate provided between the axial direction wall part and a pinion gear having the gear mechanism, and a box in which the motor, the planetary gear mechanism, the axial direction wall part, and the plate are housed. The box defines a breather hole that communicates with a breather chamber. The box has a radial direction wall part having a portion positioned between the plate and the breather chamber in a radial direction. The plate has a portion positioned between the pinion gear and the breather hole.

An axle assembly for a working machine is provided. The axle assembly has an axle housing comprising a central portion housing a gear, wherein the gear is configured to rotate about an axis and is configured to be partially disposed in a lubricant reservoir, and at least one arm portion extending from the central portion, with the arm portion housing at least one driveshaft. The axle assembly further includes a conduit assembly configured to direct lubricant from the central portion to the arm portion, with the conduit assembly including a lubricant catcher having an inlet disposed in an interior volume of the central portion.

A motor having a motor shaft rotatable about a motor axis; a power transmission having gears and connected to the motor shaft; a housing having a motor housing portion accommodating the motor and a gear accommodation portion accommodating the power transmission; a fluid contained in the housing; and a fluid channel through which the fluid flows, in which a reservoir storing the fluid above the motor axis is provided in the inside of the gear accommodation portion. The fluid channel includes an external supply channel for supplying the fluid from an outside of the motor to the motor, and an internal supply channel for supplying the fluid to a hollow portion of the motor shaft. The reservoir has a first supply port and a second supply port. The external supply channel is connected to a first supply port. The internal supply channel is connected to a second supply port.

A drive apparatus includes a motor having a rotor with a hollow motor shaft and a stator, a gear connected to the rotor, a housing including a motor housing accommodating the motor, and a gear housing at one side in an axial direction of the motor housing and accommodating the gear, and a passage. The gear includes a hollow gear shaft connected to one side in the axial direction of the motor shaft. The passage includes a first portion connecting the inside of the gear housing and the inside of the gear shaft, a second portion at least partially configured by the inside of the gear shaft and the inside of the motor shaft and connected to the first portion, a third portion connected to the second portion on the other side in the axial direction, and a first supply portion connected to the third portion and above the stator.