In-wheel motor drive device

摘要

An in wheel motor driving device which has a deceased axial dimension and includes aluminum alloy housings having a minimum wall thickness for reduced weight while retaining good assemblability. An in-wheel motor driving device includes: a motor section which has an output shaft; a wheel hub bearing section C; and a speed reducer section which connects the output shaft of the motor section and the wheel hub bearing section coaxially with each other. A housing outer circumferential portion of the motor section and a housing outer circumferential portion of the speed reducer section are integral with each other, being provided by one, outer circumferential member. An outboard-side end member is fixed to an outboard-side end of the outer circumferential member by means of bolts, and the wheel hub bearing section has its fixing ring fixed to the outboard-side end member.

主权项

1. An in-wheel motor driving device comprising:
a motor section including an output shaft; a wheel hub bearing section; and a speed reducer section connecting the wheel hub bearing section coaxially with the output shaft of the motor section, wherein a housing outer circumferential portion of the motor section and a housing outer circumferential portion of the speed reducer section are integral with each other, being provided by one, outer circumferential member, wherein an outboard-side end member, which is a separate body from the outer circumferential member, is fixed to an outboard-side end of the outer circumferential member, and the wheel hub bearing section has its fixing ring connected and fixed to the outboard-side end member using fastening bolts, wherein an outer circumference of an inboard-side end of the outboard-side end member is provided with a protruding wall portion which is fitted to an inner circumference of the outboard-side end of the outer circumferential member, and wherein a seal member is disposed between the protruding wall portion and the inner circumference of the outboard-side end of the outer circumferential member in order to prevent oil leakage from inside.