Clutch actuator assembly

A clutch actuator assembly comprising:

• a motor provided with a worm shaft, wherein a screw thread is formed at an exterior circumference thereof;
• a worm wheel having first and second guiding holes and provided with a worm gear at outer circumference thereof to be engaged to the screw thread of the worm shaft,
• an operation unit mounted in the first and second guiding holes and moving in a radial direction from or to a rotation center of the worm wheel by operation of the worm wheel;
• and
• an upper body including a penetration hole, and engaging or releasing a clutch by pivotal movement of an end portion thereof according to a movement of the operation unit.