DECELERATOR OF POSSIBLE CHANGE SPEED AND ELECTRONIC PARKING BRAKE WITH THE SAME

摘要

PURPOSE: A gear shifting decelerator and an electronic parking brake with the same are provided to improve response in braking. CONSTITUTION: A sun gear(141) is installed in the rotary shaft(131) of a motor(130). Multiple planetary gears(142) are engaged with the sun gear. A carrier(143) is connected to the shaft of the planetary gears and rotates. An internal gear unit comprises a fixed internal gear(145-1) and a rotary internal gear(145-2). A mobile tool is prepared in the fixed internal gear and moves the internal gear in the longitudinal direction of the rotary shaft.