| 摘要 |
An electric ratchet wrench includes a driving member (21) rotatably mounted in a body (10). A pawl device (22) is pivotably mounted to the driving member (21). A ring gear (23) is rotatably mounted around the driving member (21). An elastic device (30, 30a) is mounted between the ring gear (23) and the driving member (21). A transmission shaft (51) includes a first end connected to a motor (41) and a second end configured to switch between a meshing state meshed with the ring gear (23) and a disengagement state disengaging from the ring gear (23). The motor (41) drives the transmission shaft (51) to rotate the driving member (21). The body (10) can be manually driven to overcome a resistance which is larger than the torque outputted by the motor (41) and which causes a tooth slippage phenomenon between the transmission shaft (51) and the ring gear (23). |
