Patent ID: 9051982
Filing Date: 2015-06-09
Classification: F16D

Abstract:
1. An electric caliper brake with a parking function comprising: a caliper submodule comprising a pair of pad plates disposed on both sides of a disc to apply pressure to the disc to perform braking, a caliper housing provided with a cylinder having a piston for application of pressure to the pad plates installed therein to be movable forward and backward, and a spindle unit provided with a nut installed through a rear portion of the cylinder to apply pressure to the piston by converting rotational movement into rectilinear movement at the caliper housing to convert rotational motion into rectilinear motion, and a screw coupled to the nut; an actuator submodule comprising a motor to produce a braking force to perform a braking function and the parking function, and a gear assembly configured with a plurality of gears to reduce a rotational speed of the motor; and a self-locking module to transfer a rotational power by connecting a final output gear of the gears to the screw, wherein the self-locking module comprises: a first connector installed at a rear portion of the screw to rotate together with the screw; a second connector installed at a center of the final output gear to rotate together with the final output gear; and a torsion spring, one end thereof being connected to the first connector and another end thereof being connected to the second connector to transfer the rotational power, wherein the torsion spring elastically deforms according to a load from a time point at which the pad plates pressed by the piston begins to contact the disc, to restrict rotation of the disc.