Jiaozuo brake

Knowledge of the structural principles of electric hydraulic drum brakes

The electric drum pressure block brake device generates friction between the brake pads and the wheel drum or disc, and during the friction process, the kinetic energy of the car during driving is converted into thermal energy for consumption. There are two common types of brake devices: "drum brake" and "disc brake", and their basic features are as follows:

Drum brake: Install two semi circular brake pads inside the wheel hub of the car, and use the "lever principle" to push the brake pads to make them come into contact with the inner surface of the wheel drum and cause friction. According to the connection method between the brake pad (referred to as the brake pad) and the brake pad, the hydraulic brake and whether there is a counterbore at the end of the brake pad hinge hole are divided into the following 5 types: B1 type: hydraulic brake requires rivet holes on the brake pad, and the brake pad is connected by bonding, and the end of the brake pad hinge hole is not counterbore; B1C type: without rivet holes on the brake pad, connected to the pad by bonding, and the end of the brake pad hinge hole has a countersunk hole; B2 type: There are rivet holes on the brake pad, which are used to bond and connect the brake pad. The end of the brake pad hinge also has no countersunk holes; B2C type: There are rivet holes on the brake pads, which are connected to the brake pads by riveting. The end of the brake pad hinge shaft also has a countersunk hole. ZK type: brake pad mounting type YWZ4 red net diagram

Drum brakes have been used in cars for nearly a century, but due to their reliability and powerful braking force, drum brakes are still used in many car models (mostly on the rear wheels). Drum brake is a hydraulic device that pushes the brake pads inside the brake drum outward, causing friction between the brake pads and the inner surface of the brake drum that rotates with the wheels, resulting in braking effect

The inner surface of the drum brake drum is the location where the braking device generates braking torque. Under the condition of obtaining the same braking torque, the diameter of the brake drum of the drum brake device can be much smaller than that of the brake disc of the disc brake. Therefore, large vehicles used for carrying loads can only install drum brakes in the limited space of the wheels to obtain strong braking force.

Mode of action of drum brake

Simply put, drum brake is a braking device that uses the stationary brake pads inside the brake drum to friction the brake drum as the wheels rotate, in order to generate friction and reduce the speed of wheel rotation.

When pressing the brake pedal, the force exerted by the foot will cause the piston in the brake master cylinder to push the brake oil forward and generate pressure in the oil circuit. Pressure is transmitted to the brake cylinder piston of each wheel through brake oil, which then pushes the brake pads outward, causing friction between the brake pads and the inner surface of the brake drum, and generating enough friction to reduce the wheel speed to achieve the purpose of braking.

The action mode of the disc brake:

As the name suggests, disc brakes use stationary brake discs to grip the brake discs that rotate with the tires to generate friction, causing the wheels to rotate at a lower speed.

When the brake pedal is pressed, the piston in the brake master cylinder is pushed and pressure is established in the brake oil circuit. Pressure is transmitted to the piston of the brake cylinder on the brake caliper through brake oil. When the piston of the brake cylinder is under pressure, it moves outward and pushes the brake pads to clamp the brake disc, causing friction between the brake pads and the brake disc, reducing the wheel speed and slowing down or stopping the car.

Hydraulic brakes have stable braking, low noise, long service life, and multiple power connections. The brake can automatically compensate for pad wear and does not require frequent maintenance and adjustment.