Wednesday, July 04, 2012

Brake Drum

  • Brake Drum is an important component of an automobile used to apply brake on the wheel through the brake shoes fitted inside the Drum.
  • The primary purpose of the brake drum is to absorb kinetic energy during braking. Also, being a part of load carying member of a vehicle, different load conditions are required to be considered for the brakedrum analysis.
  • When a driver applies the parking brake on a vehicle equipped with rear drum brakes, it pulls cables that are attached to actuator levers and struts inside the brake drum. Hydraulic pressure from the master cylinder expands the wheel cylinder at the top of the backing plate. The wheel cylinder is attached to the top end of the two semi circular brake shoes which are pressed into the inside of the brake drum by the expansion of the wheel cylinder. Friction between the brake shoe lining and the brake drum slows the car.

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