Abstract: A motor assembly includes a motor, an electric pump to supply oil to the motor, an inverter assembly connected to the motor, and a first wire harness and a second wire harness. The inverter assembly includes an inverter to convert a high-voltage direct current into an alternating current and supply the alternating current to the motor, and a controller to control the inverter and the electric pump. The first wire harness electrically connects an external power supply and the inverter assembly, and passes a low-voltage power supply line. The low-voltage power supply line is, at a branch point, branched into a controller power supply line to supply drive power to the controller and a pump power supply line to supply drive power to the electric pump.

Abstract: An electric motor includes a housing with a tubular wall extending in an axial direction of the housing and a closures positioned at opposite axial ends of the tubular wall, a stator fixedly mounted inside of the housing, a rotor rotatably mounted inside of the housing, and a bearing rotatably supporting the rotor. At least one of the closures includes a rotor supporting portion. The rotor supporting portion includes a through hole configured to receive a portion of the rotor. The through hole is defined by a closed shape including at least three or more straight sides, and a radius of an inscribed circle of the closed shape of the through hole is larger than a radius of the portion of the rotor received in the through hole.

Abstract: An electric motor includes a rotor assembly rotatable about a vertical center axis, a stator assembly around the rotor assembly, a housing inside of which the stator assembly is fixed, and a bearing mechanism rotatably supporting the rotor assembly. The housing includes a cylindrical wall portion inside of which the stator assembly is located, a bottom at a bottom vertical end of the cylindrical wall portion and extending radially outward, and a cover plate on one side of the stator assembly opposite to the bottom. The cover plate includes electrically conductive elements and at least one columnar projection protruding away from the stator assembly so that the at least one projection contacts at least one grounding contact of a controller on one side of the cover plate, the controller being electrically connected to a ground potential through the housing.

Abstract: A motor assembly includes a first shaft rotatable about a motor axis, a second shaft that extends along the motor axis and is connected to the first shaft on one side in an axial direction of the first shaft to be movable in the axial direction, a first bearing that supports an end at another side in the axial direction of the first shaft, a second bearing that supports an end at one side in the axial direction of the first shaft, a third bearing that supports an end at another side in the axial direction of the second shaft, and a fourth bearing that supports an end at one side in the axial direction of the second shaft. An elastic portion is on a surface opposing another side in the axial direction of the outer ring of the first bearing.

Abstract: A drive device includes a motor, a housing, an oil passage in the housing, an oil pump in which a portion of the oil passage is provided, and a strainer inside the housing and in which a portion of the oil passage is provided. The oil passage includes an oil sump in which oil is accumulated and a suction path connecting the oil sump and the oil pump. A central axis of the oil pump extends in a direction intersecting the vertical direction. The strainer is in the suction path. The strainer includes a suction port to suction oil from the oil sump, a discharge port to discharge oil toward the oil pump, and a filter. The suction port opens downward in the vertical direction. The discharge port opens in a direction intersecting the vertical direction toward the oil pump.

Abstract: According to one aspect of the present disclosure, a driving device is a driving device for rotating an axle of a vehicle and includes: a motor having a rotor rotating about a motor axis extending in a horizontal direction orthogonal to a vertical direction; a reduction gear connected to the rotor; a differential gear connected to the motor via the reduction gear; and a housing configured to house the motor, the reduction gear and the differential gear therein. The housing has a protrusion that protrudes upward in the vertical direction, and at least one circumferential rib that extends in a circumferential direction. The protrusion has a female screw hole into which an eye bolt can be tightened. At least one of the circumferential ribs is connected to the protrusion.

Abstract: The motor unit includes: a motor having a motor shaft that rotates around a motor axis extending along a horizontal direction; a gear section connected to the motor shaft on one side of the motor shaft in an axial direction; a housing that houses the motor and the gear section; and an oil contained in the housing. The housing includes a motor housing section that has inside a motor chamber for housing the motor, and a gear housing section that has inside a gear chamber for housing the gear section. The housing is provided with an oil passage along which the oil circulates for cooling the motor. A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor. A rotation axis of the pump motor is parallel to the motor axis.

Abstract: A transport robot is configured to transfer a transported article to and from an installed shelf by passing the installed shelf. A shelf portion that holds the transported article is configured to pass the installed shelf by the transport robot traveling. A chassis is configured to support the shelf portion. A stand is disposed on a first end portion side in a right-left direction of the transport robot, and extends upward from the chassis. An operating unit is configured to be installed on the stand.

Abstract: An electric motor includes a housing with a tubular wall extending in an axial direction of the housing and a closures positioned at opposite axial ends of the tubular wall, a stator fixedly mounted inside of the housing, a rotor rotatably mounted inside of the housing, and a bearing rotatably supporting the rotor. At least one of the closures includes a rotor supporting portion. The rotor supporting portion includes a through hole configured to receive a portion of the rotor. The through hole is defined by a closed shape including at least three or more straight sides, and a radius of an inscribed circle of the closed shape of the through hole is larger than a radius of the portion of the rotor received in the through hole.

Abstract: The motor unit includes: a motor having a motor shaft that rotates around a motor axis extending along a horizontal direction; a gear section connected to the motor shaft on one side of the motor shaft in an axial direction; a housing that houses the motor and the gear section; and an oil contained in the housing. The housing includes a motor housing section that has inside a motor chamber for housing the motor, and a gear housing section that has inside a gear chamber for housing the gear section. The housing is provided with an oil passage along which the oil circulates for cooling the motor. A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor. A rotation axis of the pump motor is parallel to the motor axis.

Abstract: An electric motor includes a housing with a tubular wall extending in an axial direction of the housing and a closures positioned at opposite axial ends of the tubular wall, a stator fixedly mounted inside of the housing, a rotor rotatably mounted inside of the housing, and a bearing rotatably supporting the rotor. At least one of the closures includes a rotor supporting portion. The rotor supporting portion includes a through hole configured to receive a portion of the rotor. The through hole has a triangular or polygonal shape, and a radius of an inscribed circle of the triangular or polygonal shape of the through hole is larger than a radius of the portion of the rotor received in the through hole.

Abstract: The motor unit includes: a motor having a motor shaft that rotates around a motor axis extending along a horizontal direction; a gear section connected to the motor shaft on one side of the motor shaft in an axial direction; a housing that houses the motor and the gear section; and an oil contained in the housing. The housing includes a motor housing section that has inside a motor chamber for housing the motor, and a gear housing section that has inside a gear chamber for housing the gear section. The housing is provided with an oil passage along which the oil circulates for cooling the motor. A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor. A rotation axis of the pump motor is parallel to the motor axis.

Abstract: A motor assembly includes a motor, a housing that accommodates the motor, an inverter electrically connected to the motor, an inverter case that accommodates the inverter, an auxiliary device provided in a lower portion of the housing to oppose a road surface, a wire harness that includes a first connector connected to a connector provided in the inverter case, a second connector connected to a connector provided in the auxiliary device, and an electric wire connecting the first connector and the second connector, and a lower connector cover provided in the lower portion of the housing and covering the second connector from a lower side.

Abstract: A partition wall of a drive device has a first partition wall and a second partition wall. The first partition wall extends in a direction intersecting with an axial direction and covers one end portion of a motor housing in the axial direction. The second partition wall extends in a direction intersecting with the axial direction and is disposed on one side in the first direction perpendicular to the axial direction with respect to the first partition wall, and covers the other end portion of the gear housing in the axial direction together with the first partition wall. The second partition wall is disposed on one side in the axial direction with respect to the first partition wall.

Abstract: A motor assembly includes a motor, a housing that houses the motor, an inverter that is electrically connected to the motor, an inverter case that houses the inverter and is provided integrally with the housing, a wire harness including a first connector electrically connected to a connector positioned on a side surface of the inverter case, a second connector electrically connected to a connector of the housing, and an electric wire electrically connecting the first connector and the second connector, and a side connector cover provided over the side surface of the inverter case, covering the first connector laterally.

Abstract: A gear system connected to a motor, the motor including a motor shaft, a motor housing, and a motor flange, is provided. A first gear is attached to an axially lower end of the motor shaft. A second gear is attached to an axially upper end of a fixed shaft, the second gear meshing with the first gear and being rotatable with respect to the fixed shaft. A pivot shaft is directly or indirectly attached to the axially upper end of the fixed shaft, the pivot shaft being at least partially fixed in a third through-hole of a motor flange.

Abstract: A drive device that rotates an axle of a vehicle includes a motor, a transmission that includes a decelerator connected to the motor, a housing that accommodates the motor and the transmission, a temperature sensor to detect a temperature of the motor, and a controller to control the motor. Oil supplied to the transmission is accommodated in the housing. The controller limits an output of the motor based on a detection result of the temperature sensor.

Abstract: A drive device includes a motor, a housing, an oil passage in the housing, an oil pump in which a portion of the oil passage is provided, and a strainer inside the housing and in which a portion of the oil passage is provided. The oil passage includes an oil sump in which oil is accumulated and a suction path connecting the oil sump and the oil pump. A central axis of the oil pump extends in a direction intersecting the vertical direction. The strainer is in the suction path. The strainer includes a suction port to suction oil from the oil sump, a discharge port to discharge oil toward the oil pump, and a filter. The suction port opens downward in the vertical direction. The discharge port opens in a direction intersecting the vertical direction toward the oil pump.

Abstract: A drive device that rotates an axle of a vehicle includes a motor, a decelerator connected to the motor, a differential connected to the motor via the decelerator, a housing that accommodates the motor, the decelerator, and the differential, an oil pump to send, to the motor, oil accommodated in the housing, and a controller to control the motor. The controller drives the oil pump after the ignition switch of the vehicle is turned off.

Abstract: A motor assembly includes a first shaft rotatable about a motor axis, a second shaft that extends along the motor axis and is connected to the first shaft on one side in an axial direction of the first shaft to be movable in the axial direction, a first bearing that supports an end at another side in the axial direction of the first shaft, a second bearing that supports an end at one side in the axial direction of the first shaft, a third bearing that supports an end at another side in the axial direction of the second shaft, and a fourth bearing that supports an end at one side in the axial direction of the second shaft. An elastic portion is on a surface opposing another side in the axial direction of the outer ring of the first bearing.