Jiaozuo brake

The advantages and disadvantages of drum brakes and disc brakes have always been concerned. Especially in recent years, with the basic replacement of disc brakes in the field of household cars, many people began to fall in love with disc brakes. However, in the field of commercial vehicles, drum brakes still dominate the market, and whether they will develop towards disc brakes in the future remains to be tested.

Is the future the world of disc brakes? I'm afraid I'm not satisfied with the drum style

Drum brakes have low cost and poor heat dissipation

As early as 1902, drum brakes were designed for use in carriages, and it was not until around 1920 that they began to be widely used in the automotive industry. Drum brakes use a brake transmission mechanism to compress the brake shoes onto the inner side of the brake drum, generating braking force. They slow down the wheels or park within the shortest distance as needed to ensure driving safety and ensure reliable parking without automatic slipping.

Drum brakes are mainly divided into leading and trailing shoe brakes and bidirectional self boosting brakes. The leading and trailing shoe brakes are divided into wedge-shaped block brakes and camshaft brakes, and the braking effect of bidirectional self boosting brakes is relatively better.

Is the future the world of disc brakes? I'm afraid I'm not satisfied with the drum style

Drum brakes are cheap and conform to the traditional design. For heavy vehicles, the speed is generally not very high, the durability of brake shoes is also higher than that of disc brakes, and under the condition of obtaining the same braking torque, the diameter of the brake drum of drum brakes is much smaller than that of disc brakes. Therefore, many heavy vehicles still use the four-wheel drum design.

Is the future the world of disc brakes? I'm afraid I'm not satisfied with the drum style

Is the future the world of disc brakes? I'm afraid I'm not satisfied with the drum style

Although drum brakes are widely used in the field of commercial vehicles, they also have their own shortcomings. Firstly, the heat dissipation is much worse, and secondly, the braking force stability is insufficient. The braking changes greatly on different road surfaces, making it difficult to control. When continuously applying the brake, it may cause brake recession and cause brake failure. In addition, after using the drum brake for a period of time, it is necessary to regularly adjust the gap between the brake shoes, and even remove the entire brake drum to clean the accumulated brake powder.

● High cost of disc brake Brake pads are often replaced

Compared with the drum brake, the disc brake appeared relatively late, but its development speed is very fast. At present, domestic domestic cars have basically achieved the configuration of front disc and rear drum, and even some cars of higher grade have achieved Disc brake before and after.

With the development of China's automotive industry, national standards have increasingly strict requirements for automotive braking performance. In some commercial vehicles, there have also been configurations of front and rear discs, and even front and rear discs. GB7258-2012 (implemented on September 1, 2012) clearly states that the front wheels of special school buses and dangerous goods transport vehicles and other buses with a length of more than 9m shall be equipped with disc brakes.

Is the future the world of disc brakes? I'm afraid I'm not satisfied with the drum style

The heat dissipation performance of the disc brake is very good, and the braking system responds quickly, which can make high-frequency braking action, so it is more in line with the requirements of the ABS system. Compared with the drum brake, the Disc brake is simple in structure and easy to maintain. Under the same size, since the contact area between the brake pad and the brake drum of the drum brake is larger than that of the Disc brake, the brake force of the drum brake is also larger, so the drum brake is generally used for heavy haul trucks.

Is the future the world of disc brakes? I'm afraid I'm not satisfied with the drum style

The disk brake has not yet shaken the position of drum brake in the commercial vehicle field. In addition to its high cost, it is also not suitable for some special environments, for example, it is easy to damage the brake disc in case of more sand and stones. In addition, the friction area between the brake pad and the brake disc of the Disc brake is smaller than that of the drum brake, and the brake force is also smaller. Moreover, the brake pad is more worn, and the replacement frequency is higher.

● Postscript:

Overall, both disc and drum brakes have their own advantages or disadvantages, and the most significant difference between the two seems to be focused on thermal decay and braking force. Disc brakes have slightly less braking force, but better thermal decay, while drum brakes have the opposite. Many comments on the Internet previously said that Disc brake is the future trend. At present, it is still too early to say.