Coupling structure of in-wheel motor drive device and strut type suspension device
AssigneeNtn Corporation
InventorsShiro Tamura, Shinya Taikou
Life of this patent
Estimating the term…
Abstract
A strut type suspension device has a retractable strut (111) that connects to an upper portion of an in-wheel motor drive device (10) so as not to relatively move; and a swingable lower arm (116) that is coupled to a lower portion of the in-wheel motor drive device in any direction, and permits vertical swinging of the in-wheel motor drive device and also permits steering of the in-wheel motor drive device about a steering shaft (S) that passes through a coupling point (119) between the lower arm (116) and the in-wheel motor drive device. An axis (M) of the motor portion (21) of the in-wheel motor drive device is arranged above a height of the coupling point (119) of the lower arm (116).
Claims14
A coupling structure of an in-wheel motor drive device and a strut type suspension device, comprising:
- an in-wheel motor drive device having a wheel-hub bearing portion rotatable supporting a wheel hub, a motor portion that is provided offset from an axis of the wheel-hub bearing portion and drives the wheel hub, and a speed reduction portion that reduces a rotational speed of the motor portion to transmit the reduced rotational speed to the wheel hub;
- and
- a strut type suspension device having a retractable strut that connects to the in-wheel motor drive device and a swingable lower arm that is coupled to the in-wheel motor drive device in any direction, permitting vertical swinging of the in-wheel motor drive device and also permitting steering of the in-wheel motor drive device about a steering shaft that passes through a coupling point between the lower arm and the in-wheel motor drive device,
- wherein an axis of the motor portion is arranged above the coupling point of the lower arm,
- wherein the axis of the motor portion is arranged on a vehicle front side from a vehicle longitudinal position of the axis of the wheel-hub bearing portion, and
- wherein the speed reduction portion is a parallel three-shaft type speed reducer having an input shaft that extends along the axis of the motor portion;
- an output shaft that extends along the axis of the wheel-hub bearing portion;
- and an intermediate shaft that extends in parallel to the input shaft and the output shaft, and the intermediate shaft is arranged on a vehicle front side from the strut.
A coupling structure of an in-wheel motor drive device and a strut type suspension device, comprising:
- an in-wheel motor drive device having a wheel-hub bearing position rotatably supporting a wheel hub, a motor portion that is provided offset from an axis of the wheel-hub bearing portion and drives the wheel hub, and a speed reduction portion that reduces a rotational speed of the motor portion to transmit the reduced rotational speed to the wheel hub;
- and
- a strut type suspension device having a retractable strut that connects to the in-wheel motor drive device and a swingable lower arm that is coupled to the in-wheel motor drive device in any direction, permitting vertical swinging of the in-wheel motor drive device and also permitting steering of the in-wheel motor drive device about a steering shaft that passes through a coupling point between the lower arm and the in-wheel motor drive device,
- wherein an axis of the motor portion is arranged above the coupling point of the lower arm, and
- wherein the in-wheel motor drive device further comprises a carrier of which a central portion connects to a non-rotating member of the wheel-hub bearing portion, an upper end portion connects to the strut, and a lower end portion is coupled to the lower arm in any direction.
Dependencies are inferred from the claim text.