Abstract: A power transmission device includes: a gear; a case receiving the gear; and a baffle plate positioned between the gear and the case; the baffle plate including a guide portion arranged to guide an oil scooped up by the gear, into between the baffle plate and the case, and the guide portion being disposed above an oil level within the case, the guide portion being adjacent to an axial side surface of the gear, the guide portion being positioned in the baffle plate on an upstream side in a rotation direction of the gear, and the guide portion including a first bent portion which is positioned on a tip end side, and which is bent in a direction from the case toward the gear.

Abstract: A vehicle driveline component having a housing with a lube feed ramp between a bearing bore and a surface in which a first end of a lubricant channel is formed. The bearing supports a pinion for rotation about a first axis. The surface is transverse to the bearing bore. The lube feed ramp is defined by a warped planar surface that provides a transverse transformation between the bearing bore and the surface that is transverse to the bearing bore. The lube feed ramp is configured to direct a portion of a lubricant exiting the bearing into the first end of the lubrication channel.

Abstract: A powertrain arrangement for a transverse mounted motor for an electric powered automotive passenger vehicle including opposing wheel shafts for powering two parallel mounted wheels, the shafts rotating about a first axis, the shafts having at least one end torsionally connected with a differential, an electrical rotor torsionally connected with the wheel shafts via a planetary gear train, an electrical stator surrounding the rotor, a casing supporting the rotor and the wheel shafts, the casing encompassing the stator, the casing having a floor forming a lubricant reservoir, and a baffle located in the lubricant reservoir. The baffle forming a wall with a portal allowing flow through the formed wall, and wherein an increase of fluid pressure throttles flow through the formed wall.

Abstract: A transfer case having, a transmission mount, an input shaft received through the transmission mount, an electric propulsion motor, a transfer case portion and a transmission portion. The transfer case portion has a transfer case portion input, a first transfer case portion output, a second transfer case portion output, and a power transfer mechanism, the first transfer case portion output being drivingly coupled to the transfer case input portion, the power transfer mechanism drivingly coupling the second transfer case portion output to the first transfer case output portion. the transmission portion has a first coupling, which is selectively operable for drivingly connecting the input shaft to the transfer case portion input, and a second coupling that is selectively operable for drivingly connecting a rotor of the electric propulsion motor to the transfer case portion input.

Abstract: A transfer case includes a primary shaft, a secondary shaft radially offset from the primary shaft, and a torque transfer mechanism. The primary shaft includes a central channel and an inclined fluid channel. The torque transfer mechanism is configured to selectively transfer torque from the primary shaft to the secondary shaft, and includes a primary sprocket coupled to the primary shaft for transferring torque to the secondary shaft. The inclined fluid channel is associated with the primary sprocket, and includes an outlet that axially overlaps the primary sprocket.

Abstract: The invention relates to an adapter plate for connecting a motor and a housing of a gear, having a passage opening for receiving a shaft coupling at least partially, a groove arranged in a first front side of the adapter plate (1, 101) and extending circumferentially around the passage opening, and at least one channel which is in communication with the groove.

Abstract: A gear baffle, a gearbox of a gas turbine engine including a gear baffle, and a method of installing a gear baffle adjacent to a gear in a gearbox of a gas turbine engine are disclosed. The gearbox includes a housing, having disposed therein a gear, and a baffle adjacent to the gear to interact with lubricant fluid around the gear. The baffle includes a first interface for attaching the baffle to a structure to a first side of the gear, and a second interface for attaching the baffle to a structure to a second, axially opposite, side of the gear. The second interface may be axially spaced apart from the first interface by an axial distance. The baffle may include a main wall interconnecting the first interface with the second interface. The main wall may include a compliant corrugation that accommodates a variation in the axial distance between the first interface and the second interface.

Abstract: A heat transfer system for a vehicle including an axle assembly having a carrier housing. A sump defined by the carrier housing contains a fluid lubricant. The heat transfer system further includes a heat exchanger within the sump. The heat exchanger is in fluid communication with a battery cooling unit.

Abstract: A drivetrain system includes a housing configured to at least partially contain a liquid lubricant such as oil that flows through a gearset. Within the housing is arranged a plurality of bearings configured to constrain respective trajectories of respective shafts. An inner surface of the housing includes a first region surrounding a motor gear bearing that is actively cooled by a coolant. The inner surface also includes a second region that is distal to the motor gear bearing and that is not actively cooled by the coolant. Cooling pins are arranged in the first region and are configured to provide heat transfer from the liquid lubricant to the coolant. The gear set can include more than one shaft, with at least one gear configured to splash oil onto the cooling pins to transfer heat from the liquid lubricant to a coolant flowing in a motor housing adjacent the first region.

Abstract: An oil guidance arrangement for a transmission housing (1) of a vehicle includes at least one annular oil slinger (2) for collecting radially outward flowing oil. A guide area (3) for generating a laminar oil flow is closed in sections and is provided on a circumferential area of the oil slinger (2). A transmission housing (1) includes the oil guidance arrangement. The oil slinger (2) of the oil guidance arrangement is attached to a transmission housing-side centering plate (10) and surrounds a clutch (6). By rotation of the clutch (6), oil is guidable radially outward to the guide area (3) of the oil slinger (2).

Abstract: Multifunction baffles and work equipment transmissions containing multifunction baffles are provided. In various embodiments, the work equipment transmission includes a gearbox housing having an outlet port, a sump retaining a lubricant reservoir, and a first gear rotatably mounted in the gearbox housing such that a portion of the first gear is located below an upper surface of the lubricant reservoir. A multifunction baffle, which is installed within the gearbox housing, includes a circumferential shroud wall and an integrated suction tube. The integrated suction tube includes, in turn, a suction tube body integrally formed with the circumferential shroud wall, an inlet end portion in fluid communication with the lubricant reservoir, an outlet end portion in fluid communication with the outlet port, and a lubricant flow passage within the suction tube body and through which the lubricant is drawn from the lubricant reservoir.

Abstract: A turbine engine system includes a gutter and a gear train with an axial centerline. The gutter is disposed radially outside of the axial centerline. The gutter at least partially circumscribes the gear train, and includes an inner surface and a channel. The channel receives fluid directed out of the gear train. The channel extends radially into the gutter from the inner surface to a channel end, and circumferentially to a channel outlet. At least a portion of the channel has a cross-sectional channel geometry that tapers axially as the channel extends radially towards the channel end.

Abstract: A vehicle drive-force transmitting apparatus including: a differential ring gear that is to be rotated about a first axis; a pump that is to be driven when the differential ring gear is rotated; a casing that stores therein the differential ring gear and the pump; a pipe that is connected to the pump so as to supply oil sucked by the pump, to lubrication-required elements of the drive-force transmitting apparatus; a catch tank that is provided by a rib provided in the casing; and a guide way that is provided by a rib provided in the casing. The guide way is configured to guide the oil discharged from the pipe, to the catch tank.

Abstract: A work equipment transmission includes a gear, a gearbox, and a baffle. The gearbox housing contains the gear within an internal cavity that defines a sump and is defined by a first housing body having a first baffle-retaining surface and an outlet opening and a second housing body having a second baffle-retaining surface. The baffle has a shroud wall defining a peripheral lip for engagement with the first baffle-retaining surface, an annular collar having an annular collar lip for engagement with the second baffle-retaining surface, and an end wall. The baffle is mounted within the gearbox housing, the end wall extending proximate the gear and the shroud wall extending at least partially around the gear. The baffle is mounted by a clamping force between the first housing body and the second housing body.

Abstract: An integrated pinion/bearing/coupling (PBC) assembly for use with a hypoid gearset in power transfer assemblies of motor vehicles having mounting features and venting features, The integrated PBC assembly includes a hollow pinion unit made of steel and including a pinion shaft segment and a pinion gear segment, and a coupling unit having a hub segment made of aluminum. A brazing sleeve is used to braze the aluminum hub segment of the coupling unit to the steel pinion shaft segment of the pinion unit.

Abstract: In a lubricating structure for a transmission, a case rib for stopping oil that is scooped up by a final driven gear is disposed on an inner surface of a first transmission case. The case rib is disposed above a location of a lower side portion of the final driven gear, which is immersed in the oil accumulated below the first transmission case, and at a position above a differential device and a drive shaft.

Abstract: A differential device includes a plurality of differential gears, one or a plurality of differential gear support members supporting the differential gears respectively, a support part supporting the differential gear support members, a pair of output gears meshing with each of the differential gears, a washer disposed on the output gears, one of cover members covering the back face side of the one of the output gears and has part of a planetary carrier and another cover member covering a back face side of the other output gear, one of the cover members formed on one of the output gears an abutment part that receives the washer, a plurality of through holes provided at intervals in a peripheral direction at positions where at least part thereof overlaps the abutment part, and a plurality of recess parts provided in parts where the through holes and the abutment part intersect.

Abstract: A lubrication structure of a power transmission device includes a housing, a bearing, a baffle, and an additional lubricating oil supply mechanism. A driven gear is to be housed in the housing. The bearing is provided in the housing to rotatably support the driven gear. The baffle is provided in the housing above the bearing in a height direction of the power transmission device. The baffle includes a tubular oil supply passage and a lubricating oil receiver. Lubricating oil is supplied to the bearing via the tubular oil supply passage. The lubricating oil receiver is connected to and is provided above the tubular oil supply passage in the height direction to receive lubricating oil splashed by the driven gear in order to supply the received lubricating oil to the tubular oil supply passage. The additional lubricating oil supply mechanism is to supply lubricating oil to the tubular oil supply passage.

Abstract: A lubrication structure of a power transmission device, includes a housing including a bottom space to store lubricating fluid in which a rotating body is immersed to be lubricated, a partition dividing the bottom space into a first space in which a rotating body is provided and a second space opening to the first space, a tubular duct including a projection duct projecting in a projection direction from an end of the first space to the second space such that the first space and the second space communicate with each other via the tubular duct, and a strainer provided in the second space and including a suction inlet through which the strainer is configured to suction the lubricating fluid stored in the bottom space, the suction inlet being located between the end of the first space and a tip end of the projection duct in the projection direction.

Abstract: A gearbox includes a housing, which has a lower housing part onto which an upper housing part is placed. The lower housing part and the upper housing part are in physical contact along a contact surface, for example, so that the contact surface between the lower and upper housing part lies in a plane and/or is planar. Cooling fins are situated on the housing, the cooling fins having a curved characteristic such that a portion of an axially directed airflow streaming along the housing, and thus in particular an airflow that is streaming parallel to the axis of rotation of the input shaft, is deflected in a transverse direction between two cooling fins disposed closest to each other in the axial direction in each case, the axial direction, for example, being parallel to the contact surface, e.g., the plane.

Abstract: An axle assembly includes a first axle shaft, an axle housing, a first inlet port, a first outlet port, and a first oil passage. The axle housing has a first housing component that includes a first space in which at least part of the first axle shaft is disposed, a flange that is adjacent to the first space and includes a communicating hole, and a central housing component that includes a central space connected to the first space through the communicating hole of the flange. The first inlet port is disposed below an axis of the first axle shaft in the central space. The first outlet port is disposed in the first space. The first oil passage extends from the first inlet port to the first outlet port.

Abstract: There is provided a vehicle power transmission device which transmits power output from an electric motor (driving source) to left and right axles through planetary gear mechanisms and a differential device. In the device in which a parking gear is provided in a carrier of the planetary gear mechanism, the parking gear is supported on the carrier so that it is relatively rotatable, and a dog clutch (contact and release mechanism) for bringing the parking gear and the carrier into contact and disconnecting them is provided.

Abstract: Provided is a flow path structure of a power transmission device which is capable of removing gas from a lubricating fluid guided to a fluid reservoir while suppressing an increase in a size of the entire power transmission device. A gasket (63) has an extending portion which extends toward an inside of a transmission case (31). A flow path (70) which extends from an upper portion to a lower portion and guides lubricating oil discharged from a discharge mechanism (64) to an oil reservoir is formed inside the transmission case (31) using the extending portion. The discharge mechanism (64) discharges the lubricating oil toward an inner surface of the flow path (70).

Abstract: A worm drive system is provided. The worm drive system having: a motor for rotating a worm, the worm having a bearing surface rotatably received by a bearing surface integral with a housing the worm is located in, wherein a lubrication reservoir is located proximate to the bearing surface of the worm such that lubricants located in the reservoir are dispersed onto the bearing surface of the worm.

Abstract: A dividing wall structure for a liquid collecting device and for a vehicle structure having a crankshaft and connecting rods. The dividing wall structure includes liquid channels and shaped portions for turning crankshaft and/or connecting-rod sections. Liquid can be forced out of the shaped portions associated liquid collecting device.

Abstract: A differential gear assembly, a gear shaft for a differential gear assembly, and a method of assembly. The differential gear assembly includes a casing, a first gear shaft, a first differential side gear, and at least one fastening member. The fastening member may be visible from outside the casing.

Abstract: A system has an input shaft driving a first gear and supported by at least one input shaft bearing. The first gear drives at least a second gear. The second gear drives an output shaft. The output shaft is supported by at least one output shaft bearing. A gear bearing also supports at least one of the first and second gears. Lubricant movement structure is associated with at least one of the first and second gears for moving lubricant in an axial and in a radial direction to drive the lubricant toward at least one of the shaft bearing and the gear bearing. A spacecraft is also disclosed.

Abstract: In an attachment structure for an oil guide plate including an oil guide plate and a seal member, the seal member is disposed at an edge part of the oil guide plate along an outer peripheral end portion, the seal member is an elastic body element protruding from both sides of the oil guide plate in a plate thickness direction, a pair of facing surfaces facing each other and pinching the edge part from both sides of the edge part in the plate thickness direction is disposed in a fixing portion in the case where the oil guide plate is attached, and the fixing portion pinches and compressively deforms the seal member with the pair of facing surfaces and supports the oil guide plate via the seal member.

Abstract: A power transfer device that includes a transmission, a drive pinion gear to which power from the transmission is transferred, a differential ring gear disposed below the drive pinion gear and meshed with the drive pinion gear, a differential gear coupled to the differential ring gear, and a cover that covers at least a part of the differential gear.

Abstract: A passive lubrication system, for a gear drive system of a drive system, for powering an electric vehicle, includes an oil network, an oil sump region, an oil paddle, and an oil diverter. The oil network is defined by and disposed within, at least, a fixed annular region of the gear drive system and a planetary gear system. The oil sump region is configured to provide oil for distribution about the oil network. The oil paddle is operatively coupled with the planetary gear system, configured to rotate with a component of the planetary gear system, and during rotation, configured to course oil, from the oil sump region. The oil diverter is positioned concentric with the oil paddle and radially outward of the oil paddle and configured to receive oil from an oil source, upon rotation of the oil paddle, and direct the received oil to the oil network.

Abstract: An automobile transmission hydraulic oil fill system includes a transmission oil pan and a two-piece standpipe system. The two-piece stand-pipe system includes a clinch nut connected to the oil pan and having a threaded bore opening through the oil pan. A stand-pipe is fixed to the clinch nut. The stand-pipe includes a longitudinal bore in fluid communication with the threaded bore. An end cap defining a free end of the stand-pipe prevents entrance of hydraulic oil into the longitudinal bore of the stand-pipe during hydraulic oil fill of the transmission. Multiple ports created in a side wall of the stand-pipe allow entrance of the hydraulic oil into the longitudinal bore and to flow out of the threaded bore of the clinch nut. Each of the ports include an edge. The edges of the ports define a hydraulic oil fill level of the transmission.

Abstract: A baffle includes a disk, a rim, a peripheral portion, and an outlet. The rim is connected to and circumferentially surrounds a portion of the disk. The peripheral portion is connected to and circumferentially surrounds the rim. The peripheral portion forms a channel. The outlet is fluidly connected to the channel of the peripheral portion. The outlet includes a cover and a series of openings. The cover caps a distal end of the outlet. The series of openings is disposed on a portion of the outlet and is fluidly connected to the channel via the outlet.

Abstract: A snubber for an automotive transmission includes a generally flat surface configured to limit radially-outward movement of a drive member that transfers torque from a transmission gearbox output to a differential input. A mouth of the snubber is fluidly coupled to an internal cavity that capturing transmission fluid as the fluid is moved around due to movement of the drive member. A wing of the snubber extends from the generally flat surface toward the drive member. The wing has a hollow interior fluidly coupled to the internal cavity. A concave outer surface is located outside of and adjacent to the mouth. The concave surface deflects a portion of the fluid, preventing that portion from entering the mouth. This increases the flow of fluid away from the drive member which can lead to drag.

Abstract: A baffle for a transmission of a vehicle is provided. The transmission includes a gearbox that outputs torque to a differential, which distributes the torque to the wheels. A chain transfers the torque from the transmission to the differential. A baffle is provided adjacent to, but spaced from, the chain to contain and direct at least some of the lubricating fluid that the chain comes in contact with. The baffle has a base with a planar side surface. A flange extends from the base, and extends radially about part of the transmission output and the differential input to follow the path of the chain. One end of the flange is provided with an opening to direct fluid through the opening, out of the baffle and into other regions of the transmission such as the transmission sump. This inhibits buildup of fluid in the sump of the baffle.

Abstract: In an oil passage structure for a power transmission device including a case provided to accommodate a power transmission device, a baffle plate attached to an inner wall of the case, and an oil pump, the oil passage structure includes a supply oil passage through which oil is pumped from the oil pump to an oil supply destination via the baffle plate. The baffle plate has a structure in which two members of a plate body and a plate-shaped auxiliary member are superposed and integrated with each other. The baffle plate is provided with a plate oil passage that constitutes a portion of the supply oil passage and passes through the inside of the baffle plate. The plate oil passage is formed by a recess provided in at least one of a surface of the plate body and a surface of the auxiliary member which face to each other such that the auxiliary member is interposed on the plate body.

Abstract: A device for lubrication and noise attenuation of a gear box includes: a case housing where a lubricant is provided in the bottom side thereof; a driving gear provided in the case housing and rotating by a driving torque of an engine; first and second driven gears engaged to lateral sides of the driving gear and rotating; and a third driven gear engaged to an upper side of the driving gear and rotating, wherein the case housing includes a lubrication plate provided in an inclined manner from an upper side of the first driven gear to one side of the third driven gear such that the lubricant drawn up by rotation torque of the first driven gear is churned to an inner surface of the lubrication plate and then dropped at the upper side of the first driven gear and one side of the third driven gear for lubrication.

Abstract: An electrically actuated rotary drive device which has a gear casing with an electrical drive motor mounted at its rear side and on which is rotatably mounted an output member in driving connection with the drive motor. The driving connection is realized by gearing means provided in the gear casing and containing a driven gear fitted to the output member, in the form of a ring gear with internal tooth system, and a drive pinion belonging to the drive motor and with an external gear teeth system. The drive pinion extends into the ring gear, inside the gear casing.

Abstract: A transmission system may include a first bevel gear, a second bevel gear and a baffle. The second bevel gear is meshed with the first bevel gear, and includes a plurality of gear teeth arranged in a circumferential array. The baffle includes a baffle wall and a baffle outlet. The baffle wall is arranged next to and covers a subset of the gear teeth. The baffle outlet forms a lubricant outlet passage that extends through the baffle wall.

Abstract: A gear is configured such that: a ring gear, a drive pinion shaft having a pinion gear meshing with the ring gear, and rolling bearings supporting the drive pinion shaft such that the drive pinion shaft is rotatable are accommodated in a differential housing; the differential housing is divided into a differential mechanism chamber in which to accommodate the ring gear, and a pinion shaft chamber in which to accommodate the rolling bearings; and a feed oil passage configured to supply lubricant scooped up by the ring gear to the pinion shaft chamber, and a return oil passage configured to discharge the lubricant in the pinion shaft chamber to the differential mechanism chamber are provided in the differential housing. In the differential gear, an inlet of the feed oil passage is placed at a position that is offset from the ring gear in an axial direction of the ring gear.

Abstract: An axle assembly having a dam module. The dam module may include a dam, an upper brace, and a lower brace. The dam may be at least partially disposed in an arm portion of a housing of the axle assembly. The upper brace and the lower brace may be disposed proximate the dam. The upper brace may transport lubricant to the dam.

Abstract: A connecting rod assembly including a connecting rod, a bushing with an inner surface and an outer surface, and a pin connectively coupled to the piston and the connecting rod at the small end. The bushing contacts the pin on the inner surface and the connecting rod on the outer surface. The bushing may be self-lubricate when the bushing moves rotationally with respect to the connecting rod.

Abstract: A breather device that is attached to a case of a transmission and performs ventilation in the case, includes: a main body member including a storage portion with a closed bottom and an open upper end; and a cover member configured to close the upper end of the main body member and including a vent hole for ventilation to outside. The storage portion comprises a first chamber having, in a bottom portion, a communicating port communicating with an interior of the case, and a second chamber configured to receive a liquid entering from the vent hole.

Abstract: A drive train includes a gearbox having a gearbox housing, and a generator having a generator housing. A lubricating oil system including an oil reservoir lubricates toothed contact areas and/or bearings which are arranged within the gearbox housing. The oil reservoir is arranged within the generator housing or on an exterior side of the generator housing.

Abstract: A manifold for distributing lubricant in a transmission includes an inlet supply nozzle for receiving transmission lubricant, and a main body in fluid communication with the supply nozzle. The main body defines a channel having open side. The manifold also includes a cover connected to the main body at the open side that creates a fluid seal along an edge of the channel. A first port extends from the main body for dispersing lubricant in a solid stream spray pattern onto traction components of the transmission. A second port extends from the main body for dispersing lubricant in a fan spray pattern onto traction components of the transmission. The manifold also includes an exhaust nozzle to discharge lubricant from the manifold for recirculation within the transmission.

Abstract: A multi ratio drive including a first drive chain having a first drive chain engaged state and a first drive chain disengaged state; and a second drive chain having a second drive chain engaged state and a second drive chain disengaged state. The first drive chain drives the axle with a first gear ratio between the drive shaft and the axle when the first drive chain is in the first drive chain engaged state and the second drive chain is in the second drive chain disengaged state; the second drive chain drives the axle with a second gear ratio between the drive shaft and the axle when the second drive chain is in the second drive chain engaged state and the first drive chain is in the first drive chain disengaged state; and the first gear ratio is different from the second gear ratio.

Abstract: A lubricating apparatus of the present invention is applied to a transmission having a plurality of rotating shafts, and includes a first rotating shaft having a first oil passage, a second rotating shaft, and an impeller fixed to an axial end of the first rotating shaft. The impeller is arranged in a first oil storage chamber communicated with an outlet of the first oil passage. The impeller rotates with the first rotating shaft to scatter oil, and supplies the oil to the second rotating shaft.

Abstract: One implementation of a vehicle power transfer unit (PTU) housing, such as that for an automobile, has an oil feed passage extending through one of its walls and at its interior. The oil feed passage delivers oil to gears, bearings, and/or other components equipped inside of the PTU housing and suspended above an oil bath in the PTU housing. Oil of the oil bath is thrown about by rotating gears and makes its way through the oil feed passage and to the gears, bearings, and/or other components. With the oil feed passage, the PTU housing does not rely solely on oil sloshing and splashing and being slung around inside of the PTU housing as the technique for getting oil to the gears, bearings, and/or other components.

Abstract: A lubricating structure for a speed reducer includes: a case; a first reduction gear pair provided inside the case; a second reduction gear pair provided inside the case; a first catch tank arranged inside the case; a second catch tank arranged inside the case; a partition member that includes a partition wall that partitions an inside of the case into a first accommodation space in which the first reduction gear pair is accommodated and a second accommodation space in which the second reduction gear pair is accommodated; a first oil passage communicating with the first accommodation space and configured to guide lubricating oil to the first catch tank; a second oil passage communicating with the second accommodation space and configured to guide lubricating oil to the second catch tank; and a communication port provided in the partition member and communicating the first oil passage with the second oil passage.

Abstract: A lubricating structure for a speed reducer includes: a case; a reduction gear provided inside the case, the reduction gear being configured to rotate around a rotation axis; a catch tank configured to store part of lubricating oil scooped up by the reduction gear; an oil passage provided in the side wall, the oil passage being configured to guide the lubricating oil, scooped up by the reduction gear, to the catch tank; a rib formed on the side wall so as to radially extend, the rib being configured to guide the scooped-up lubricating oil toward a radially inner side; and a groove provided at an end edge of the rib of the side wall, the lubricating oil trapped by the rib being introduced into the groove, and the groove communicating with the lubricating oil supply object.

Abstract: A partition wall that partitions an inside of a case into a gear chamber in which a reduction gear pair is accommodated and a motor chamber in which an electric motor is accommodated, a bearing provided at a bearing support portion of the partition wall so as to overlap with a side portion of a large-diameter gear of the reduction gear pair in a direction of an axis and supporting a counter shaft, an oil passage provided in the gear chamber and guiding lubricating oil, scooped up by the large-diameter gear to a catch tank, and a communication hole provided in the partition wall and providing communication between the oil passage and the motor chamber, are provided. Lubricating oil introduced into the motor chamber via the communication hole is supplied to the bearing.