Electromechanical brake and method of operating the same

Abstract

Disclosed is an electromechanical brake and a method of operating the same. In accordance with an aspect of the disclosure a electromechanical brake includes a piston configured to advance and retreat to press a brake pad; a power transmission unit configured to receive a driving force from an actuator to convert a rotational motion into a linear motion, and provide the converted driving force to the piston; and a position adjustment unit configured to adjust a relative position of the piston with respect to the power transmission unit; wherein the power transmission unit includes a spindle rotating by receiving the driving force from the actuator, and a nut connected to the spindle and moving forward or backward an inside of the piston by rotation of the spindle in a first direction or a second direction to advance and retreat the piston, wherein the position adjustment unit includes a first screw thread formed on an outer circumferential surface of the nut, a second screw thread formed on an inner circumferential surface of the piston and meshing with the first screw thread, and an adjuster provided between the spindle and the nut and configured to rotate the nut in the first direction or the second direction by rotation of the spindle to advance and retreat the relative position of the piston.