What is the difference between drum brakes and disc brakes? Which is better?

Disc brakes and drum brakes: Disc brakes are also called hydraulic brakes or oil brakes; Drum brake is a traditional braking method of friction deceleration between brake pads and wheel drums, and vehicles on the market generally use disc brakes for front wheels and drum brakes for rear wheels, which is the so-called "front disc and rear drum" configuration. The rear wheels do not use disc brakes because of the cost, and there are many large rows of motorcycles that have front and rear disc brakes.

Disc brakes are better than drum brakes, with larger disc diameters as much as possible, more pistons on calipers, and less weight on their own.

Drum brake shoes are divided into collar shoes and slave shoes, and it is the collar shoes that can automatically increase the force. There are two brake shoes on one wheel. It is generally in the form of collar hooves, but there are also double collar hooves or double hooves.

Sometimes the brakes will make a chirping sound, that is, the sound of the collar shoes, although the braking force is large, but it will damage the brake shoes.

Drum brakes also have their own advantages, in addition to the low cost, under the same diameter conditions, the absolute braking force of the drum brake is greater than that of the disc brake, and the drum brake can increase the braking force with the help of the wheel forward rotation. Of course, drum brakes are more likely to lock up, and thermal decay is faster.

The biggest difference between drum brake and disc brake (disc brake) is the problem of heat dissipation, the heat dissipation of drum brake is not good in high-speed driving, and it is easy to accumulate heat to cause heat exhaustion in the brake part, and the braking force is weakened, while the disc brake has good ventilation and fast heat dissipation, which is not easy to produce heat exhaustion.

In addition, the disc brake is caliper-type, the brake pad and the disc are in flat contact, the contact surface is large, the time is consistent, and the braking is rapid; The drum brake pad and the brake drum are in curved contact, from point to surface, and the braking efficiency is relatively low.

Saucers, of course, are more expensive than drums.

Disc brakes and drum brakes have their own advantages: disc brakes have good heat dissipation, slightly longer life, and are beautiful, but the braking force is not as good as drum brakes, and the maintenance cost is slightly more expensive and costly; The drum brake braking force is larger, the maintenance cost is low, the cost is low, and the parking brake design is more convenient, but the heat dissipation is not good.

Brake disc type good:

1. Good thermal stability. This is because the brake disc has no friction force enhancement effect on the friction pad, and also because the size of the brake friction pad is not long, and the area of its working surface is only 12 6 of the area of the brake disc, so the heat dissipation is better;

2. Good water stability. Because the unit pressure of the brake pad on the disc is high, it is easy to squeeze out the water, and it is easy to shake off after being stained with water under the action of centrifugal force.

1. The second braking can return to normal; The drum brake needs to go through more than ten braking times to restore normal braking efficiency;

3. Good braking stability. The braking torque of the disc brake is linearly related to the piston thrust and friction coefficient of the brake cylinder, and there is no self-increasing effect, so the braking torque growth is slower in the braking process, and compared with the drum brake, it can ensure high braking stability.

<> "There are two types of automobile braking systems: drum brakes and disc brakes, and many riders don't know what the respective advantages and disadvantages of drum brakes and disc brakes are, so let's talk about them.

Advantages of drum brakes:

The braking force is very high, and the best braking effect can be achieved in a short time. Counterfeiting is cheap and pure, and it has good performance on the road surface with more sand and gravel, and is more durable, suitable for large cars.

Disadvantages of drum brakes:

The contact area between the brake drum and the brake pads is large, and the heat dissipation is poor, which affects the braking performance. Do not use it continuously at high frequency, otherwise it may cause brake failure or failure.

Advantages of disc brakes:

It dissipates heat quickly and has excellent water stability. The braking force is relatively even, and the response is fast. The brakes are relatively smooth, the comfort is very high, it can be used continuously and frequently, and the structure is simple, which is convenient for daily maintenance and repair.

Disadvantages of disc brake finches:

The braking force is small, the wear is fast, and the brake pads need to be replaced frequently. The manufacturing process is relatively complex, so both the maintenance cost and the manufacturing cost are relatively high.

Which is better, disc brake or drum brake?

Disc brakes are a little better than drum brakes. As we can see from the above, whether it is braking performance or practicality, the performance of disc brakes is a little better than that of drum brakes. Drum brakes are still the earliest type of brakes, a bit old in terms of design, and are more suitable for some large cars, so if you are driving a car, I personally recommend choosing Zen absolute disc brakes, and if you want to save money, it is naturally better to use drum brakes.