| 摘要 |
PROBLEM TO BE SOLVED: To enable a wheel drive device, which transmits rotation of an electric motor to wheels by reducing a rotation speed through a speed reduction mechanism, to stably perform power regeneration.SOLUTION: A wheel drive device has a clutch 5 which is installed between a planetary gear (speed reduction) mechanism 4 to reduce a rotation speed of an electric motor 3 and a hub 2 to transmit rotation output by the planetary gear mechanism 4 to wheels A. When input torque is applied from the electric motor 3 to the clutch 5 through the planetary gear mechanism 4, the rotation is transmitted to an inner ring 14 with engagement between the inner ring 14 and an outer ring 15 of the clutch 5 released. When the wheels A are driven with the hub 2 integrally rotated with the inner ring 14 and reverse input torque is applied from the wheels A to the inner ring 14 of the clutch 5 through the hub 2, the rotation of the outer ring 15 engaged with the inner ring 14 of the clutch 5 is transmitted to a rotor 22 of a generator 6 without the planetary gear mechanism 4. Thus, the wheel drive device can stably perform power regeneration even when a speed reduction ratio of the planetary gear mechanism 4 is large.SELECTED DRAWING: Figure 1 |
