Vehicular drive system
AssigneeHonda Motor Co., Ltd.
InventorsShingo Soma, Yutaka Arimura, Daisuke Hoshino, Tatsuya Ohzu, Yosuke Tanaka
Life of this patent
Estimating the term…
Abstract
A drive motor includes a torque sensor on an outer circumference of a shaft. The drive motor includes a rotor, a rotor shaft arranged inside the rotor, and an output shaft that is joined to the rotor shaft by a joint having a loose element. In the drive motor, the output shaft outputs rotational force of the rotor shaft to the output side. The torque sensor is arranged on an upstream side of the joint in a range not overlapping with the joint.
Claims9
A vehicular drive system comprising a wheel, a wheel output shaft connected to the wheel, and a drive motor configured to selectively rotate the wheel output shaft to drive the wheel, the drive motor comprising:
- a rotor;
- a rotor shaft arranged within the rotor;
- and
- a magnetostrictive torque sensor arranged on an outer circumference of the rotor shaft,
- wherein the drive system further comprises a torque output shaft that is joined to the rotor shaft by a joint having a loose element, the torque output shaft configured to transmit rotational force of the rotor shaft from an input side to an output side,
- the drive motor further comprising a first bearing that is supportively attached to the rotor shaft on the input side of the magnetostrictive torque sensor, and a second bearing that is supportively attached to the rotor shaft on the output side of the magnetostrictive torque sensor,
- wherein the magnetostrictive torque sensor is arranged on the input side of the joint, in a range not overlapping with the joint.
In a vehicle having a drive wheel, the improvement comprising a vehicular drive system comprising an engine selectively connectable to the wheel, a generator selectively connectable to the engine, and a brake regeneration motor operatively connected to the wheel, the brake regeneration motor comprising:
- a rotor;
- a rotor shaft arranged within the rotor;
- a first bearing that rotationally supports the rotor shaft;
- a magnetostrictive torque sensor arranged on an outer circumference of the rotor shaft, and
- a second bearing that is supportively attached to the rotor shaft on a side of the magnetostrictive torque sensor opposite the first bearing,
- wherein the drive system further comprises a torque output shaft that is joined to the rotor shaft by a spline joint and which transmits rotational force of the rotor shaft from an input side to an output side,
- wherein the magnetostrictive torque sensor is arranged closer to the output side than the first bearing, and
- wherein the magnetostrictive torque sensor is arranged on the input side of the joint, in a range not overlapping with the joint.
Dependencies are inferred from the claim text.