In-wheel motor driving device

Abstract

An in-wheel motor driving device (10) includes: a wheel hub bearing portion (11) including a rotatable ring (12) adapted to rotate integrally with a wheel assembly, a fixed ring (13) placed coaxially with the rotatable ring, and a plurality of rolling members (14) placed in an annular-shaped gap between the rotatable ring and the fixed ring; a motor portion (21) adapted to drive the rotatable ring; a speed reduction portion (31) including an output shaft (36c) coaxially coupled to the rotatable ring, and an input gear (32) coupled to a motor rotational shaft (22) in the motor portion, the speed reduction portion being adapted to reduce a speed of a rotation of the motor rotational shaft (22) and to transmit the rotation to the rotatable ring; and an oil pump (53) placed coaxially with the wheel hub bearing portion and adapted to be driven by the output shaft.

Dependencies are inferred from the claim text.