| 摘要 |
PROBLEM TO BE SOLVED: To provide an actuator and a self-locking mechanism thereof which have high transmission efficiency and which can achieve the self-locking of an electric parking brake system.SOLUTION: An actuator for an electric parking brake system includes a motor, an output member, and a speed reduction device. The speed reduction device includes a transmission mechanism and a self-locking mechanism. The self-locking mechanism includes a fixed member, first and second rotating bodies, and a spring. The second rotating body transmits torque to the output member via a planetary gear mechanism. The spring prevents the brake from driving the motor.SELECTED DRAWING: Figure 3 |
