A hydraulic circuit for a vehicle driving device includes an oil pump, a clutch oil passage, a cooling oil passage, a pressure regulating valve, and a shift valve. The cooling oil passage guides oil to a cooled portion of a vehicle. Supply of oil to the clutch oil passage and the cooling oil passage is switched by switching of the pressure regulating valve and the shift valve. The cooling oil passage includes: a shaft center cooling oil passage which supplies cooling oil to a shaft center of a rotation shaft of an electric motor mounted on the vehicle; and a cooling oil passage shift valve which switches presence/absence of supply of oil to the shaft center cooling oil passage.

A drivetrain system includes a first drive gear driven by a first motor and a second drive gear driven by a second motor. The first drive gear and the second drive gear are arranged along the axis. The first drive gear includes a first extension and the second drive gear includes a second extension arranged radially within and axially overlapping the first extension. The drivetrain system includes a system of bearings arranged between the first drive gear and the second drive gear, either drive gear and a stationary component, or a combination thereof. In some embodiments, the drivetrain system includes a clutch assembly arranged between the first drive gear and the second drive gear that interfaces to the first drive gear and to the second drive gear. The clutch assembly allows the drive gears to be locked or otherwise engaged to improve torque transfer.

A motor vehicle transmission having a planetary gear system with three coaxially arranged gearsets (RS1, RS2, RS3) coupled to one another. The first gearset (RS1) includes a first sun gear (SR1), a first planet carrier (ST1) and a first ring gear (HR1). The second gearset (RS2) includes a second sun gear (SR2), a second planet carrier (ST2) and a second ring gear (HR2), and the third gearset (RS3) includes a third sun gear (SR3), a third planet carrier (ST3) and a third ring gear (HR3). The second and third gearsets (RS2, RS3) have the same stationary gear ratio and the second and third sun gears (SR2, SR3) are arranged in a rotationally fixed manner on a common driveshaft (AW). The second and third sun gears (SR2, SR3) are made integrally with the driveshaft (AW).

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.

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 friction bearing of a planetary gearbox has a first rotationally fixed component and a second component rotatably connected thereto. Oil in the region of an oil feed pocket of the first component is directed into the bearing clearance between the components. The oil is directed into the oil feed pocket via at least one first line that opens into the oil feed pocket. Oil is also directed via at least one second line into the oil feed pocket, the port region of said second line into the oil feed pocket in the circumferential direction of the bearing clearance and in the main rotation direction of the second component in relation to the first component and/or in the axial direction of the friction bearing being spaced apart from the port region of the first line into the oil feed pocket.

A planetary gearbox has a sun gear, planet gears, a ring gear and plain bearing pins. A plain bearing pin is arranged in a respective planet gear, wherein the plain bearing pin and the planet gear form a lubricated plain bearing which includes a plain bearing gap, and on its contact face, the plain bearing pin forms a feed pocket which is configured to receive oil and output it to the plain bearing. On its contact face, the plain bearing pin forms an additional feed pocket which is configured to receive oil and output it to the plain bearing, is spaced from the feed pocket in the circumferential direction, and is connected to the feed pocket such that oil from the additional feed pocket can flow on the contact face of the plain bearing pin to the feed pocket.

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.

A planetary gearbox of a gas turbine engine has a planet gear which, via a bearing, is arranged rotatably on a planet pin of a rotatable planet carrier. Oil is introduced through an opening, arranged radially within the bearing, into an oil feed which is open at a feed side and which is connected to the bearing and rotationally joined to the carrier. As the carrier rotates, the oil downstream of the opening is conducted toward the bearing unit by centrifugal force. The open oil feed is, between the opening and the bearing, configured an oil filter through which the oil is conducted. The filter extends counter to the flow direction of the oil from the opening in the direction of the bearing unit, in a flow direction of the oil in the open oil feed.

A planetary gearbox having a sun gear, a plurality of planet gears, a ring gear, and a plurality of journal bearing pins. At its axially forward face side and/or at its axially rearward face side, each planet gear forms a recess that extends inside the planet gear starting from the face side. The planet gear forms a protrusion at its axially forward face side and/or at its axially rearward face side. The protrusion has an axial extent and a radial extent, wherein the radial extent is limited at the respective face side to the area between the planet gear inner bore and the radial inner limit of the respective recess in the planet gear, and wherein the protrusion is configured to provide for a flow path for oil emerging from the journal bearing that guides the oil away from the journal bearing.