Patent ID: 8772991
Filing Date: 2014-07-08
Classification: B60K,B60L,F16C,F16H,H02K,Y02T

Abstract:
1. An in-wheel motor driving device comprising: a motor section which drives and thereby rotates a motor-side rotation member having eccentric sections; a speed reducer section which reduces a rotating speed of the motor-side rotation member for transmission to a wheel-side rotation member; a housing which holds the motor section and the speed reducer section; and a wheel hub which is fixed to and connected with the wheel-side rotation member; wherein the speed reducer section includes: a revolving member which has a through-hole for insertion of the eccentric section and makes a revolving movement around a rotation axis of the motor-side rotation member in association with the rotation of the motor-side rotation member; an outer circumferential engager which makes engagement with an outer circumferential portion of the revolving member thereby causing a rotational movement of the revolving member; an outer circumferential engager holding section fitted and fixed to an inner diameter surface of the housing which holds the speed reducer section, for holding the outer circumferential engager in parallel with the rotational axis of the motor-side rotation member; and a motion conversion mechanism which converts the rotational movement of the revolving member into rotational movement of the motor-side rotation member about its rotation axis, for transmission to the wheel-side rotation member, wherein an elastic member is disposed on one or each of two axial end surfaces of the outer circumferential engager holding section, between the housing and the outer circumferential engager holding section.