US 2017/0001513 A1 · IN-WHEEL MOTOR DRIVE DEVICE

Abstract

Provided is an in-wheel motor drive device, including a casing configured to hold a motor part, a speed reduction part, and a wheel bearing part, the motor part including; a stator, which is fixed to the casing; a rotation shaft of a motor, which is rotatably supported on the casing through intermediation of rolling bearings; and a rotor, which is mounted to the rotation shaft of the motor. The rolling bearing has a radial internal clearance of from 8 μm to 25 μm before being mounted into the motor part. The rotation shaft of the motor is rotatably supported on the casing through intermediation of a plurality of rolling bearings. The rotation shaft of the motor and the rolling bearings configured to support the rotation shaft of the motor are fitted to each other by transition fit or interference fit.

Claims14

Dependent claims

An in-wheel motor drive device, comprising:

a motor part;
a speed reduction part;
a wheel bearing part;
and
a casing configured to hold the motor part, the speed reduction part and the wheel bearing part,
the motor part comprising:
a stator, which is fixed to the casing;
a rotation shaft of a motor, which is rotatably supported on the casing through intermediation of rolling bearings;
and
a rotor, which is mounted to the rotation shaft of the motor, the speed reduction part comprising:
an input shaft of a speed reducer, which is rotationally driven by the rotation shaft of the motor;
and
an output shaft of the speed reducer, which is configured to transmit rotation of the input shaft of the speed reducer, which is reduced in speed, to the wheel bearing part,
each of the rolling bearings having a radial internal clearance of from 8 μm to 25 μm before being mounted.

11 more elements

Dependencies are inferred from the claim text.

In-wheel motor drive device

Life of this patent

In-wheel motor drive device

Life of this patent

Abstract

Claims14