In-wheel motor drive assembly

摘要

An in-wheel motor drive assembly 21 includes: a motor unit A; a speed reduction unit B having an output shaft 28 reducing the rotational speed of the motor rotary shaft 35 and outputting the reduced rotation and a speed-reduction-unit casing 22b forming a contour, and disposed on one axial side of the motor unit A; a wheel hub bearing unit C having a wheel hub 32 fixedly coupled with the output shaft 28 and a wheel-hub-bearing outer ring 22c rotatably supporting the wheel hub 32, and disposed on one axial side of the speed reduction unit B; and coupling portions 63, 64 secured to at least one of the wheel-hub-bearing outer ring 22c and speed-reduction-unit casing 22b to couple with members of a vehicle body.

主权项

1. An in-wheel motor drive assembly comprising:
a motor unit including a motor rotary shaft and a motor-unit casing forming a contour of the motor unit; a speed reduction unit including an output shaft reducing the rotational speed of the motor rotary shaft and outputting the reduced rotation and a speed-reduction-unit casing forming a contour of the speed reduction unit, the speed reduction unit being disposed on one axial side of the motor unit; a wheel hub bearing unit including a wheel hub fixedly coupled with the output shaft and a wheel-hub-bearing outer ring rotatably supporting the wheel hub, the wheel hub bearing unit being disposed on one axial side of the speed reduction unit; a coupling member with a root end part secured to at least one of the wheel-hub-bearing outer ring and the speed-reduction-unit casing and with a tip end part projecting radially outward and having a coupling portion at a tip end region of the coupling member, wherein one of the wheel-hub-bearing outer ring and the speed-reduction-unit casing includes a casing projecting portion projecting toward the other, and the other engages with the casing projecting portion, and the coupling member is fixedly interposed between the wheel-hub-bearing outer ring and the speed-reduction-unit casing on a radially outside of the casing projecting portion.