Patent ID: 8051965

Claim:
A clutch actuator comprising: a motor provided with a rotatable worm shaft, a screw thread formed along an exterior circumference of the worm shaft; a worm wheel provided with a worm gear engaging the screw thread, and a cam recess; an operation rod mounted to the worm wheel, the operation rod configured to engage or release a clutch; and a rotatable operation unit disposed within the cam recess, and configured to apply elastic force to the worm wheel; wherein the operation unit comprises: at least two supporting rods disposed substantially parallel to each other; at least two elastic members applying the elastic force along a predetermined direction of the supporting rods; a rotatable connecting portion connected to first ends of the supporting rods; at least two seats mounted at respective second ends of the supporting rods receiving the elastic force from the elastic members; and a first roller connecting the at least two seats, disposed in the cam recess, and configured to apply the elastic force of the elastic members to the worm wheel.