In-wheel motor drive device

摘要

An in-wheel motor driving device includes a wheel braking device. A back plate of a drum brake or a mounting member for calipers of a disc brake constituting the wheel braking device is formed integrally with an outboard-side end member which is fastened to a outboard-side end surface of a housing of a speed reducer section.

主权项

1. An in-wheel motor driving device comprising a motor section including an output shaft; a wheel hub bearing section; a speed reducer section; and a wheel braking device; the output shaft of the motor section being coaxially connected with the wheel hub bearing section via the speed reducer section;
wherein: the wheel braking device is a drum brake including a brake drum which is fastened to a hub ring in the wheel hub bearing section; and a back plate which is disposed on a fixing-ring side of the wheel hub bearing section, the back plate of the drum brake is formed integrally with an outboard-side end member, which is made of an iron or steel material and fastened to an outboard-side end surface of an aluminum alloy housing of the speed reducer section, the outboard-side end member is formed with bolt holes for bolts to fasten a fixing ring of the wheel hub bearing section, and the outboard-side end member is fastened to the aluminum alloy housing of the speed reducer section on an outer diameter side of the speed reducer section using the bolts.