rumpujarruihin

Rumpujarruihin, commonly known as drum brakes, are a type of brake where the braking mechanism consists of brake shoes that expand outwards against the inside of a rotating drum. This drum is attached to the wheel hub and rotates with it. When the brake pedal is pressed, hydraulic pressure forces the brake shoes to pivot outwards, creating friction against the inner surface of the drum. This friction slows down or stops the rotation of the drum and consequently the wheel.

Drum brakes are a relatively old braking technology, having been used extensively in automobiles for decades. They are often found on the rear wheels of many vehicles, especially older models or smaller, lighter vehicles. In some cases, they might be used on all four wheels, particularly in heavy-duty applications like trucks or buses, or in motorcycles.

The primary components of a drum brake system include the brake drum, brake shoes, wheel cylinder, and return springs. The brake shoes are typically lined with friction material. The wheel cylinder contains pistons that are pushed outwards by brake fluid pressure, forcing the shoes against the drum. Return springs pull the brake shoes back to their original position when the brake pedal is released, disengaging the brake.

Advantages of drum brakes include their ability to provide a self-energizing effect, meaning the rotation of the drum can help to push the brake shoe harder against the drum, increasing braking force. They are also generally more protected from the elements compared to disc brakes, which can be an advantage in dusty or wet conditions. However, drum brakes tend to be less efficient at dissipating heat, which can lead to brake fade under heavy use, and they can be more prone to water and dirt contamination affecting performance. Maintenance and adjustment can also be more complex compared to disc brakes.