In a shoe brake assembly, as hydraulic pressure increases, the brake wheel cylinder pushes the master shoe and slave shoe, causing them to press against the brake drum. Through friction between the friction linings, the vehicle's braking process is achieved.
Structure and Operation of the Brake Wheel Cylinder:
Function: Converts hydraulic force into mechanical thrust. Available in single-piston and dual-piston configurations.
Structure
Taking the Audi 100 as an example, its dual-piston wheel cylinder contains two pistons and two diaphragms. Springs ensure tight contact between the diaphragms, pistons, and brake shoes.
Operating Process
During braking, hydraulic fluid enters the chamber between the two pistons, pushing the brake shoes outward to engage the brakes.
The wheel cylinder body features a bleed screw to ensure responsive and reliable braking performance.
