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US 12,409,725 B2Granted
Power transmission device and automobile including the same
AssigneeHyundai Mobis Co., Ltd.
InventorKyeong Ho Shin
Life of this patent
Estimating the term…
Abstract
Disclosed is a power transmission device including a motor including a rotary shaft, a speed reducer provided on one side of the motor, and a power transmitter, provided inside the speed reducer, that transmits rotational force generated by driving of the motor to the speed reducer. The power transmitter transmits the power such that a ratio of rotational angular velocity of the speed reducer to rotational angular velocity of the rotary shaft is changed according to rotation directions of the rotary shaft of the motor.
Claims13
A power transmission device comprising:
- a motor comprising a rotary shaft;
- a speed reducer provided on one side of the motor;
- and
- a power transmitter, provided inside the speed reducer, configured to transmit rotational force generated by driving of the motor to the speed reducer,
- wherein the power transmitter is configured to transmit the power such that a ratio of rotational angular velocity of the speed reducer to rotational angular velocity of the rotary shaft is changed according to rotation directions of the rotary shaft of the motor,
- wherein the speed reducer comprises:
- a sun gear provided on the outside of the rotary shaft of the motor in a radial direction (R);
- a plurality of planetary gears provided on the outside of the sun gear in the radial direction (R) configured to engage with the sun gear;
- and
- a carrier coupled to the plurality of planetary gears and configured to rotate in engagement with revolution of the plurality of planetary gears around the sun gear, and
- wherein the power transmission unit further comprises:
- a first one-way clutch provided between the rotary shaft of the motor and the sun gear, and
- a second one-way clutch provided between the rotary shaft of the motor and the carrier.
10 more elements
An automobile comprising:
- a power transmission device;
- and
- a wheel configured to receive rotational force from the power transmission device,
- wherein the power transmission device comprises:
- a motor comprising a rotary shaft;
- a speed reducer provided on one side of the motor;
- and
- a power transmitter, provided inside the speed reducer, configured to transmit rotational force generated by driving of the motor to the speed reducer,
- wherein the power transmitter is configured to transmit the power such that a ratio of rotational angular velocity of the speed reducer to rotational angular velocity of the rotary shaft is changed according to rotation directions of the rotary shaft of the motor,
- wherein the speed reducer comprises:
- a sun gear provided on the outside of the rotary shaft of the motor in a radial direction (R);
- a plurality of planetary gears provided on the outside of the sun gear in the radial direction (R) to engage with the sun gear;
- and
- a ring gear provided on the outside of the plurality of planetary gears in the radial direction (R) to engage with the plurality of planetary gears, and
- wherein the automobile further comprises a wheel bearing coupled to the outside of the ring gear in the radial direction (R).
12 more elements
Dependencies are inferred from the claim text.