Jiaozuo brake

How much do you know about electric hydraulic drum brakes?

A typical drum brake mainly consists of components such as the base plate, brake drum, brake shoes, wheel cylinder (brake cylinder), return spring, and positioning pin.

The base plate is installed in a fixed position on the axle, which is fixed and fixed. It is equipped with brake shoes, wheel cylinders, return springs, and positioning pins to withstand the rotational torque during braking.

Each drum has a pair of brake shoes with friction lining on them. The brake drum is installed on the wheel hub and is a component that rotates with the wheel. It is made of cast iron and has a shape resembling a round drum.

When the vehicle brakes, the wheel cylinder piston pushes the brake shoe to compress the brake drum, causing the brake drum to experience friction and decelerate, forcing the wheels to stop rotating.

The structure of the rear wheel drum brake is shown in the following figure, which is a wheel cylinder non balanced brake.

In the brake, the rotating component is the brake drum, which is connected to the wheel with bolts and rotates with the wheel;

The fixed part is the brake base plate 10, which is installed on the flange of the rear vehicle bridge end. The brake base plate is equipped with brake parts such as brake shoes 3 and wheel brake cylinder assembly 9.

In the brake drum, the lower ends of the brake shoes 3 on both sides and the brake friction plate 12 are inserted into the corresponding grooves of the brake base plate 10, and the upper end is tightly against the piston of the wheel brake cylinder 9. Adjacent to the upper support point is the support point of the hand brake push rod 2, which is stuck in the push rod 2.

The upper part of the brake shoe is tightened by springs 5 and 4, and the lower part is tightened by springs 8. The brake shoe is pressed against the brake base plate 10 through the limit screw, limit spring seat 6, and limit spring.

When braking, press the brake pedal and the brake fluid pressure enters the wheel brake cylinder 9, causing the piston to move outward, pushing the brake shoe 3 and brake friction plate 12 outward to tightly press on the brake drum, causing the wheel to slow down until it stops rotating.

When applying the hand brake, pull the hand brake handle, pull the hand brake cable forward on the hand brake lever 7, and use the lever action of the push rod 2 to push the left and right brake shoes apart and press them towards the brake drum;

When the handbrake handle gets stuck, the brake shoe tightly presses against the brake drum, becoming the parking brake of the car.

The gap between the brake shoe and the brake drum is automatically adjusted through the adjustment wedge 1 installed on the push rod 2. The lower end of the adjustment wedge is equipped with an adjustment spring 13, and the adjustment spring pulls the adjustment wedge to automatically adjust the gap. (The article is sourced from the internet)