A method of electrically grounding a rotor shaft of an electric motor includes removing a first lockplate fastener from a motor endshield and an internal bearing lockplate. A second lockplate fastener remains coupled to the motor endshield and internal bearing lockplate such that the internal bearing lockplate stays secured along an interior side of the motor endshield. A mounting plate of a shaft ground assembly is positioned along an exterior side of the motor endshield. The mounting plate supports a shaft ground that includes a conductive element configured to electrically couple to the rotor shaft. The first lockplate fastener is replaced with a first mounting plate fastener coupled to the mounting plate, motor endshield, and bearing lockplate to secure the mounting plate to the endshield and to secure the bearing lockplate along the interior side of the motor endshield.

The system concerns a gear motor for a motor vehicle wiping system comprising:—an electric motor comprising a rotor, a stator and a rotating shaft solidly attached to the rotor,—a reducing mechanism connecting the rotating shaft and an output shaft of the gear motor. According to the invention, a roller bearing (23) guides the rotating shaft (22) at one of the longitudinal ends of the rotating shaft, said roller bearing (23), arranged inside the rotor and stator assembly, housed in an inner recess of the rotor, and in which a hollow support bears the magnetic elements and is arranged coaxially and connected in rotation with the rotating shaft (22), said hollow support (25) covering said roller bearing (23) guiding the longitudinal end of the rotating shaft (20) on the side of the electric motor (2), the axial locking of the roller bearing (23) on the rotating shaft (22) being obtained by pressing against the inner race of the roller bearing (23) on the inner wall of the hollow support (25), directly or indirectly through the intermediary of a spacer (8).

A gyroscopic roll stabilizer for a boat includes an enclosure mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure, and a flywheel assembly including a flywheel and flywheel shaft, with the flywheel assembly rotatably mounted inside the enclosure for rotation about a flywheel axis. The gyroscopic roll stabilizer also includes a motor operative to rotate the flywheel assembly and disposed inside the enclosure. A motor cooling circuit is configured to transfer heat away from the motor. The motor cooling circuit has a closed fluid pathway for recirculating cooling fluid therein. The fluid pathway includes a fluid channel jointly defined by the motor and the enclosure and having the cooling fluid therein. The gyroscopic roll stabilizer is configured to transfer heat away from the motor to the cooling fluid. Related methods are also disclosed.

An electric motor and a vehicle are provided. The electric motor includes a metal member, a rotor core, a shaft, a conductive bearing, and an elastic conductive member. The metal member is grounded. The rotor core is disposed on one side of the metal member, and includes a shaft hole. The shaft is connected to the rotor core, and penetrates through the shaft hole. The conductive bearing is disposed on the shaft in a sleeving manner. At least a portion of the elastic conductive member is disposed between the conductive bearing and the metal member. The elastic conductive member generates compression force through elastic deformation thereof, to be in tight contact with the conductive bearing.

An electric drive unit includes a multi-phase AC motor including a plurality of first terminals, and a power converter including a plurality of second terminals. The power converter is fixed to an electric motor case so as to partially overlap the AC motor in an axial direction with a wall portion interposed therebetween. Each first terminal includes a first extended portion extending from the stator along the axial direction, and a first fastening portion. Each second terminal includes a second extended portion extending along an extending direction at a portion of the power converter that does not overlap the AC motor in the axial direction; and a second fastening portion. The electric motor case includes a communication hole formed in the wall portion, and a service hole formed in a portion located on an extension line of the fastener parallel to an insertion direction of the fastener.

A drive device includes a shaft, a rotor, a stator, a bearing, a housing, a first neutralizing device, and a seal member. The shaft extends in the axial direction along a rotation axis. The rotor is fixed to the shaft and is rotatable about the rotation axis. The stator faces the rotor with a gap therebetween in the radial direction. The bearing rotatably supports the shaft. The housing accommodates the rotor, the stator, and the bearing. The first neutralizing device is arranged on one axial side of the bearing and electrically connects the shaft and the housing. The seal member is arranged between the bearing and the first neutralizing device in the axial direction.

A rotary actuator for a shift-by-wire system of a vehicle includes a motor with a motor shaft, an output shaft disposed in parallel with the motor shaft, a speed-reducing mechanism configured to reduce a rotational speed of the motor and transmit the rotation of the motor to the output shaft, and a case housing the motor and the speed-reducing mechanism. The speed-reducing mechanism includes a first speed-reducing portion including a ring gear and a sun gear, and a second speed reducing portion including a drive gear and a driven gear. The drive gear and the driven gear are coaxially disposed with the motor shaft and the output shaft, respectively, to serve as parallel shafts type gears. The drive gear is disposed between the motor and the first speed-reducing portion in an axial direction of the motor.

A motor includes a support frame, a stator, a bearing member, and a rotor. The support frame includes first and second tubular parts, and a vent hole. The second tubular part is disposed radially outside the first tubular part. The vent hole, extending axially, is provided between the first and second tubular parts. The stator is disposed radially outside the second tubular part, and supported by the second tubular part. The bearing member is disposed inside and supported by the first tubular part. The rotor includes a rotor frame, a shaft, and a permanent magnet. The rotor frame is disposed on a first side with respect to the support frame in the axial direction. The shaft is fixed to the rotor frame. The shaft is attached rotatably to the support frame through the bearing member. The permanent magnet is disposed radially outside the stator, and supported by the rotor frame.

The present disclosure provides a motor with a grounded rotor. The motor includes a stator and a rotor. The stator includes a bearing seat, a conductive plate and an elastic element. The bearing seat receives a first bearing and a second bearing. The conductive plate is disposed in the bearing seat and has at least one overlapping foot convexly formed thereon. The elastic element is arranged between the first bearing and the second bearing, and integrally formed with the at least one overlapping foot into one piece. The rotor includes a rotating shaft. The rotating shaft is inserted in the first bearing and the second bearing along the axial direction. The conductive plate and the rotating shaft are electrically connected to each other.

A housing for an electric machine includes a substantially cup-shaped outer housing having a first base portion and a first tubular portion adjoining the base portion. An inner housing, which has a substantially cup-shaped form, is arranged in the outer housing and has a second base portion and a second tubular portion adjoining the base portion. A cover is connected or connectable to the outer housing and/or the inner housing. At least one cooling channel is formed between the first tubular portion and the second tubular portion. A pocket is formed in the first base portion and forms a first cavity together with the second base portion, and a second cavity is formed in the cover. The first cavity is fluidically connected to the cooling channel via a first bore and the second cavity is fluidically connected to the cooling channel via a second bore.