Drum brake is a traditional brake system, its working principle can be very image with a coffee cup to describe. Brake drums like coffee cup, when you put five finger into the rotation coffee cup, finger pads, as long as you will is five points to a coffee cup, friction outside wall, coffee cup will stop rotating. Car on the drum brake simply say, piston pump by braking, composed and pads, brake by patent epi-mesotympanic route of pump braking points high-pressure brake oil drive the pistons, the brake shoes for two semilobar exert forces, make its tablet pressure drum-type linings, by friction stop brake drums rotating thus reach braking effect.

The brake drum is a kind of shaped like the tambourine iron piece, it with speed and tyre fixed and turning. Stop using hydraulic drive Brake shoe sheet ）   (Volkswagen Brake drums) contact wear, produced by contact from the friction to curb tires to achieve the purpose of turning brakes. Drum brake by brake bottom, brake points pump, brake shoe pieces and other relevant connecting rod, spring, shoots of nail, brake drum. Currently only common in the back wheel. By Drum brake with low cost, absolute braking force higher, be more practiced in small-sized car's rear.

Working principle: brake drum work principle simple says, is to rely on both to friction, reducing friction wheel rotation speed the brakes. In on the brake pedal, foot will force within the brake pump to push forth and will produce oil pressure.