Abstract: A drive device includes a motor including a rotor rotatable about a central axis, a transmission connected to the motor, and a housing including a motor housing accommodating the motor and a transmission housing accommodating the transmission. A first fluid is accommodated in the transmission housing. The housing includes a first flow path through which the first fluid flows and a second flow path through which the second fluid flows. The first flow path includes a supply flow path that supplies the first fluid in the transmission housing to the inside of the motor housing, and a collection flow path that extends from the inside of the motor housing to the inside of the transmission housing. At least a portion of the second flow path is located radially outside the motor. At least a portion of the collection flow path is located radially outside the second flow path.

Abstract: A transmission housing of a drive device is fixed to one side in an axial direction of a motor housing that includes a first housing and a second housing fixed to another side in the axial direction of the first housing. The transmission housing includes a third housing fixed to the first housing and a fourth housing fixed to one side in the axial direction of the third housing. A bolt fixing the first and second housings passes through a through-hole of the second housing from the another side in the axial direction, and is fixed to a bolt hole of the first housing. A bolt fixing the second and third housings passes through a through hole of the first housing from the another side in the axial direction, and is fixed to a bolt hole of the third housing.

Abstract: A drive device includes a motor having a motor shaft that rotates, a motor housing unit that houses the motor, a gear unit that transmits rotation of the motor shaft to an intermediate shaft, and an inverter housing unit that houses the inverter, wherein the inverter housing unit is disposed above the intermediate shaft, a lower wall portion of the inverter housing unit faces outside air, and the inverter housing unit has a vent that allows an inside of the inverter housing unit and an outside below the inverter housing unit to communication with each other.

Abstract: A stator includes: a stator core including teeth; pins including a working portion extending in an axial direction in a slot between the teeth; and bus bars electrically connected to the pins. In each slot, the working portions are disposed over stages in a radial direction. The pins include the two working portions across the teeth, first and second pins each including a connection portion connecting the working portion in a circumferential direction, and a third pin connected to the bus bar. The working portion of the second pin is disposed on one of the outermost and innermost stages of the slot, and the working portion of the third pin is disposed on one or the other of the outermost and innermost stages of the slot. A number of teeth straddled by the second pin is larger by two than a number of teeth straddled by the first pin.

Abstract: A stator includes: a stator core including teeth; pins including a working portion extending in an axial direction in a slot between the teeth; and bus bars electrically connected to the pins. In each slot, the working portions are disposed over stages in a radial direction. The pins include the two working portions disposed across the teeth, a first pin and a second pin each including a connection portion connecting the working portion in a circumferential direction, and a third pin connected to the bus bar. Each of the working portions of the second pin and the third pin is disposed in one of an outermost stage and an innermost stage of the slot. A number of teeth straddled by the second pin is smaller than a number of teeth straddled by the first pin.

Abstract: A stator unit includes: a stator core; three-phase coils inserted into slots of the stator core; a neutral point busbar connected to the three-phase coils; a busbar holder made of a resin material and covering at least a part of the neutral point busbar; and a temperature sensor that is fixed to the busbar holder while in contact with the neutral point busbar, the temperature sensor measuring the temperature of the neutral point busbar.

Abstract: A busbar unit includes: three-phase busbars connected to three-phase coils; and three-phase external terminals that are members different from the three-phase busbars, the three-phase external terminals being connected to the three-phase busbars and electrically connected to a power supply source. Each of the three-phase external terminals includes: a terminal body portion; a busbar-side connection portion connected to a busbar of one phase from among the three-phase busbars; and a power-supply-source-side connection portion electrically connected to the power supply source. At least two terminals among the three-phase external terminals are different in length of a conduction path through which a current flows between the busbar-side connection portion and the power-supply-source-side connection portion in the terminal body portion.

Abstract: A stator includes three-phase coils in which slot accommodation portions are accommodated inside slots; three external terminals; and three busbars that electrically connect the external terminals and the coils. A first coil end and a second coil end that are positioned respectively at the ends of each of the coils extend from the radially outermost side of the slots toward the first side or the second side in the axial direction of the stator core. The winding-start coil ends of the three-phase coils are connected to busbar connection portions of different busbars.

Abstract: A stator includes a stator core, three-phase coils, three external terminals, and three busbars. Each of the three-phase coils has a first coil end protruding from the radially outermost side of a slot to a first side in the axial direction of the stator core. Each of the three bus bars includes a busbar body portion extending in a circumferential direction of the stator core, a busbar connection portion extending toward the first side in the axial direction, and an external terminal connection portion extending outward in the radial direction and connected to the external terminal. The first coil end extends in the radial direction through between the busbar body portion and the stator core in the axial direction, extends toward the first side in the axial direction on a radially outer side of the busbar body portion, and has a tip connected to the busbar connection portion from the radially outer side.

Abstract: A drive device includes a motor housing and a transmission housing fixed to one side in an axial direction of the motor housing that includes a first housing and a second housing fixed to another side in the axial direction of the first housing. The transmission housing includes a third housing fixed to the first housing and a fourth housing fixed to one side in the axial direction of the third housing. The first housing includes a first opposing wall axially opposing the transmission housing, and a bearing holding portion on the first opposing wall. The third housing includes a second opposing wall opposing the first opposing wall. The housing includes an oil supply path extending axially through the second opposing wall from the inside of the transmission housing. The oil supply path includes a supply port to supply oil to the bearing.

Abstract: A drive device includes a motor including a rotor rotatable about a central axis, a transmission connected to the motor, and a housing including a motor housing accommodating the motor and a transmission housing accommodating the transmission. A first fluid is accommodated in the transmission housing. The housing includes a first flow path through which the first fluid flows and a second flow path through which the second fluid flows. The first flow path includes a supply flow path that supplies the first fluid in the transmission housing to the inside of the motor housing, and a collection flow path that extends from the inside of the motor housing to the inside of the transmission housing. At least a portion of the second flow path is located radially outside the motor. At least a portion of the collection flow path is located radially outside the second flow path.

Abstract: A transmission housing of a drive device is fixed to one side in an axial direction of a motor housing that includes a first housing and a second housing fixed to another side in the axial direction of the first housing. The transmission housing includes a third housing fixed to the first housing and a fourth housing fixed to one side in the axial direction of the third housing. A bolt fixing the first and second housings passes through a through-hole of the second housing from the another side in the axial direction, and is fixed to a bolt hole of the first housing. A bolt fixing the second and third housings passes through a through hole of the first housing from the another side in the axial direction, and is fixed to a bolt hole of the third housing.