Motor drive apparatus for vehicle, and automobile

Abstract

Provided is a motor drive apparatus for a vehicle, wherein a plurality of two-way clutches incorporated in a gearbox can be reliably prevented from engaging at the same time. A first reduction gear train (23) and a second reduction gear train (24) are provided between an input shaft (21) and an output shaft (22) to be rotary-driven by an electric motor (10). First and second two-way clutches (30A, 30B) are incorporated in a space between a first output gear (23b) of the first reduction gear train (23) and the output shaft (22) and a space between a second output gear (24b) of the second reduction gear train (24) and the output shaft (22), respectively. A first friction plate (52a) and a second friction plate (52b) are retained by retainers (36) of the two-way clutches (30A, 30B), and a control ring (51) is incorporated in a space between the friction plates (52a, 52b). The control ring (51) is shifted in the axial direction by a shift mechanism (70), so that the first friction plate (52a) moves in the axial direction, to engage the first two-way clutch (30A), and the second friction plate (52b) moves in the axial direction, to engage the second two-way clutch (30B). The first friction plate (52a) and the second friction plate (52b) are retained at their neutral positions, by a first anti-rotation means (57) and a second anti-rotation means (61), so that the first and second two-way clutches (30A, 30B) cannot engage at the same time.

Description

technical field [0001] The present invention relates to a motor drive device for a vehicle that includes an electric motor as a drive source, decelerates the output of the electric motor and transmits it to wheels, and relates to an automobile equipped with the motor drive device. Background technique [0002] As a motor drive device for a vehicle used in a drive device of an electric vehicle and a hybrid vehicle, the following motor drive device for a vehicle is conventionally known. The motor drive device for a vehicle includes: an electric motor; The rotation output from the output shaft of the motor is shifted in multiple steps; and a differential for distributing power output from the transmission to left and right axles. [0003] In the motor drive device for a vehicle as described above, the electric motor can be used in an efficient rotational speed and torque range during driving and regeneration by switching the gear ratio according to driving conditions. [0004]...

AI Technical Summary

Problems solved by technology

[0013] However, in the motor drive devices for vehicles described in Patent Documents 1 to 4, there is a possibility that a plurality of clutches are simultaneously engaged due to flaws in the control program or the like.

Here, when multiple clutches are engaged at the same time, power circulation occurs, and various parts are damaged

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