| 摘要 |
<p>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.</p> |
