Actuator and electromechanical disc brake having the same
AssigneeMando Corporation
InventorJae Jin HUR
Life of this patent
Estimating the term…
Abstract
Disclosed is an electromechanical disc brake. The electromechanical disc brake includes a piston slidably disposed in a cylinder of a caliper housing to press a pad plate, an actuator including a motor and a speed reduction device for reducing a rotation speed of the motor, an output conversion device for converting a rotational motion from the speed reduction device into a linear motion and imparting a thrust to move the piston, an elastic member for moving the output conversion device to the original position when releasing braking, and a clutch device for releasing a torque acting on the speed reduction device such that the output conversion device is moved to the original position by the elastic member when releasing the braking.
Claims11
An electromechanical disc brake comprising:
- a piston slidably disposed in a cylinder of a caliper housing to press a pad plate;
- an actuator including a motor and a speed reduction device for reducing a rotation speed of the motor;
- an output conversion device for converting a rotational motion from the speed reduction device into a linear motion and imparting a thrust to move the piston;
- an elastic member for moving the output conversion device to the original position when releasing braking;
- and
- a clutch device for releasing a torque acting on the speed reduction device such that the output conversion device is moved to the original position by the elastic member when releasing the braking.
An actuator of an electromechanical disc brake comprising a motor and a speed reduction device for reducing a rotation speed of the motor, wherein:
- the speed reduction device includes a planetary gear assembly having a sun gear, a ring gear, planetary gears and a carrier to rotate by power of the motor, and a clutch device for selectively restraining the ring gear;
- and
- the clutch device restrains rotation of the ring gear when braking and releases the restraint of the ring gear when releasing the braking so that the ring gear is in an idle state.
Dependencies are inferred from the claim text.