Integrated EPB driving device for parking braking

The utility model discloses an integrated EPB driving device for parking braking. The integrated EPB driving device for parking braking is small in occupied space and high in control operation precision. The integrated EPB driving device for parking braking comprises a driving mechanism provided with a driving motor, a planetary gear reducing mechanism and a lead screw nut transmission mechanism, wherein the driving motor enables a motor shaft to be connected with a sun wheel of the planetary gear reducing mechanism through a gear pair, the planetary gear reducing mechanism drives the lead screw nut transmission mechanism to operate, the lead screw nut transmission mechanism drives a braking piston placed in a braking wheel cylinder through a spline coupling shaft, and the braking piston pushes a friction piece to apply the brake on a brake disc; the driving mechanism is provided with a motor rotating circle number sensor, and an EPB control unit controls parking braking and releases parking braking in real time according to the motor rotating circle number and motor current. The integrated EPB driving device for parking braking has the advantages of being high in transmission efficiency, reliable in control algorithm and capable of avoiding sliding and preventing failures.