ELECTRIC DRUM OR DRUM-IN-HAT PARK BRAKE

摘要

A linear actuation assembly comprising: (a) a differential assembly and (b) a pair of linear actuators in communication with the differential assembly; wherein the pair of linear actuators are movable along an axis so that during movement of each of the pair of linear actuators a pair of brake shoes are moved to create a brake force or moved to release a brake force, and wherein the differential assembly distributes power equally to each of the pair of linear actuators until resistance of one of the brake shoes increases then the differential assembly ceases to provide power to the brake shoe with increased resistance and distributes the power from the brake shoe with increased resistance to a brake shoe of lower resistance until a brake force is created.

主权项

1. A method of applying a parking brake in a drum brake system or in a drum-in-hat brake system, the method comprising:
distributing power equally with a differential assembly to a pair of linear actuators, each of the linear actuators are in communication with a brake shoe, the power is equally distributed with the differential assembly to the linear actuators until a resistance of one of the pair of brake shoes increases, then the method includes a step of ceasing to provide power to the linear actuator in communication with the brake shoe with increased resistance, the method then includes a step of distributing the power with the differential assembly from the linear actuator in communication with the brake shoe with the increased resistance to the linear actuator in communication with the brake shoe with the lower resistance until a brake force is created.