| 摘要 |
An electric motor drive device (1) includes a motor (11), a speed reducing part (31) to reduce speed of a rotation outputted from the motor (11) and transmit it to the side of a wheel, and a connection/disconnection part (21) to disconnect or connect rotation transmission of the speed reducing part. The speed reducing part (31) has a motor side rotation member (18) serving as an input shaft to input the rotation from the motor (11), an output shaft (34) to output the rotation to the side of the wheel, a double shaft (33) arranged coaxially with the input shaft and including a tube-shaped outer side rotation shaft (33o) and an inner side rotation shaft (33i) inserted into the outer side rotation shaft, an output shaft (34) serving as an opposite-side shaft, a first speed reducing part (G1) including a plurality of rotation elements to reduce speed of the rotation on the side of the motor with a first speed reduction ratio, between one of the outer side rotation shaft (33o) and inner side rotation shaft (33i), and the opposite-side shaft, and transmit it to the side of the wheel, and a second speed reducing part (G2) including a plurality of rotation elements to reduce speed of the rotation on the side of the motor with a second speed reduction ratio different from the first speed reduction ratio, between the other one of the outer side rotation shaft (33o) and inner side rotation shaft (33i), and the opposite-side shaft, and transmit it to the side of the wheel. The connection/disconnection part (21) has a first clutch (C1) serving as an inner side rotation shaft clutch to disconnect or connect rotation transmission between the inner side rotation shaft (33i) and the input shaft coaxially arranged with each other, and a second clutch (C2) serving as an outer side rotation shaft clutch to disconnect or connect rotation transmission between the outer side rotation shaft (33o) and the input shaft coaxially arranged with each other. |
