Nidec Corporation

Tsubasa Tamura

Shuhei Nakamatsu

Keisuke Aso

Hitoshi Kuroyanagi

Shinsuke Mizukami

Keisuke Fukunaga

Hideaki Matsuo

A drive apparatus includes a motor that has a motor shaft extending in an axial direction, a transmission mechanism that is connected on one side in the axial direction of the motor shaft, a lock mechanism that restricts driving of the transmission mechanism, a housing that houses the motor, the transmission mechanism, and the lock mechanism, an oil that is stored in the housing, and an oil passage that circulates the oil. The housing includes a motor room that houses the motor, a gear room that houses the transmission mechanism and the lock mechanism, and a partition that is provided between the motor room and the gear room. The oil passage includes a pump that pumps the oil in the oil passage, a first feed flow passage that feeds the oil to the motor, and a second feed flow passage that feeds the oil to the lock mechanism.

Drive apparatus

A gear portion of a power transmission device is connected to one side in an axial direction of a first shaft rotatable about a first axis extending along a horizontal direction. The first shaft is supported by a first bearing. The gear portion includes a second shaft rotatable about a second axis below the first axis. A lubricant is provided in a first bearing holding portion of the first bearing. A gear housing that houses the gear portion includes an oil passage below the first bearing. A first end of the oil passage is connected to the first bearing holding portion through the first bearing. A second end of the oil passage is connected to a second bearing holding portion of a second bearing that supports the second shaft through an opening below the first bearing.

Power transmission device, motor unit, and vehicle

A motor unit according to an aspect of the present invention includes: a motor having a rotor that rotates about a motor axis and a stator located radially outside the rotor; an inverter that controls a current to be supplied to the motor; and a housing having a motor housing portion that houses the motor and an inverter housing portion that houses the inverter. The housing further includes an inverter housing provided with a top plate portion covering an opening of the inverter housing portion. The inverter is fixed to a back surface of the top plate portion, facing the inside of the inverter housing portion.

Motor unit

Provided is a motor unit including: a motor that rotates about a motor axis; a gear unit connected to the motor; an inverter that controls a current to be supplied to the motor; and a housing having a motor housing portion that houses the motor, an inverter housing portion that houses the inverter, and a gear housing portion that houses the gear unit. The inverter housing portion is supported by the motor housing portion and the gear housing portion. The housing includes a housing body that is a single member, the housing body including: a first wall portion that also serves as a side wall of each of the inverter housing portion and the motor housing portion; and a second wall portion that also serves as a side wall of each of the inverter housing portion and the gear housing portion.

A parking mechanism includes a shaft, a movable portion rotatable with the shaft, a pawl having a claw and movable as the movable portion rotates, a parking gear meshable with the claw, and a stopper contactable with the movable portion. The pawl is switched between parking and non-parking positions in which the claw meshes with and separates from the parking gear, respectively. The movable portion has a first elastic member attached to the shaft, and a contact member connected to the shaft via the first elastic member and in contact with the pawl. The contact member is rotatable in a rotational direction relative to the shaft as the first elastic member is elastically deformed, and is contactable with the stopper in the rotational direction. The stopper faces the contact member at a distance in the rotational direction when the pawl is switched between the parking and non-parking positions.

Parking mechanism and drive apparatus

A drive apparatus includes a power assembly rotatable about a first axis, a transmission to transmit power of the power assembly, and a parking assembly provided in the transmission. The transmission includes a first gear rotatable around a first axis, a second gear to mesh with the first gear and rotatable around a second axis, a third gear to rotate around the second axis together with the second gear, and a fourth gear to mesh with the third gear and rotatable around a third axis. The parking assembly includes a parking gear rotatable around the first axis together with the first gear, a parking pawl that includes a meshing portion and is rotatable around a fourth axis, and a drive assembly to rotationally move the parking pawl around the fourth axis and operate the parking pawl.

A bearing device includes a gear portion and a gear housing that houses the gear portion and stores a lubricant therein. The gear housing includes a side plate extending in a direction intersecting the axial direction, a recess recessed from the side plate toward the other side in the axial direction, a saucer opened upward, and a groove including a shaft opening opposing the gear housing and a peripheral opening opened to the recess. The gear portion includes an output shaft rotatably supported by the gear housing via a bearing, and a first gear connected to the output shaft. The saucer includes an opposing surface opposing an outer peripheral surface of the first gear. The groove is inclined downward toward the peripheral opening and reaches the bearing, and the shaft opening of the groove reaches the saucer.

Growing community of inventors

Kyoto, Japan

Tsubasa Tamura