In the vehicle use failure, the brake failure is a very terrible existence. For example, the "Tesla brake door" incident that made a lot of noise some time ago has frightened many car owners. For semi trailers that often transport heavy goods, brake failure is equivalent to disaster. When a fully loaded vehicle suddenly fails to brake at high speed, the consequences are often fatal, and it is no exaggeration to destroy and kill people.

But why does a good semi-trailer suddenly fail to brake when driving? The main reasons are as follows:

1. Do not pay attention to the daily repair and maintenance of the brake system, and cannot find the problems existing in the brake system in time, such as too many impurities in the brake pump, loose sealing, lack of oil in the brake master cylinder, wear or strain of wheel cylinder piston and cylinder pipe, poor contact of brake shoe friction plate, dirty or oil leakage of brake oil, etc., which affect the vehicle braking;

2. The maintenance of the braking system is not standardized, resulting in air in the braking system, such as air resistance after heating due to the mixed use of brake oil;

3. Improper operation leads to the failure of mechanical parts. For example, under the road condition of downhill for a long time, relying solely on and continuously using the braking system makes the friction heat of the brake pad, the carbonization of the brake hub and even the complete failure of the braking function;

4. The use of vehicles is not standardized, such as serious overload. Under the action of gravity acceleration, the motion inertia of vehicles is increased, which directly leads to brake failure.

Of course, there are many specific reasons for the failure of the braking system, which will not be listed here. In a word: pay more attention to the maintenance of the braking system at ordinary times, maintain it in strict accordance with the use specifications, and send it for repair in time even if it is a small problem.

If the vehicle is running and it is found that the braking system fails, for example, the braking fails, what should be done to avoid traffic accidents? The following is the collected experience and suggestions of old drivers for your reference.

1. When the vehicle is driving on a curve or uphill or downhill road, even if there is no need to brake, it is necessary to step on the brake. This can not only test the braking performance at any time, but also help the vehicle owner obtain more time to control the speed in case of brake failure, so as not to find the brake failure in case of emergency.

2. If the vehicle is driving on a straight road and the brake fails, the driver should pay attention to receiving the oil, control the steering wheel and see if he can shift the high gear into the low gear. If it is difficult to open and close the transmission due to too fast speed, you can try the "two foot throttle shift", step on the throttle to increase the engine speed, then retreat to neutral, step on the throttle again and shift into low gear. After the speed of the car drops, cooperate with the hand brake to brake. Don't pull it too hard or too slowly. Stop the car slowly and turn on the emergency signal light in time.

3. If the vehicle is driving on a flat curved road and there is still a distance from the turning, it shall be treated as a straight road; If it is close to the curve, make full use of the bumper, carriage and other rigid parts of the vehicle to rub and collide with the natural obstacles (rocks, trees and soil slopes) on the roadside, so as to achieve the purpose of forced parking and escape, and reduce the accident loss as much as possible.

4. If the vehicle fails to brake on the way up the slope, it shall be timely reduced to the low gear to keep sufficient power to drive the vehicle to the top of the slope, and then tighten the hand brake in time. The personnel with the vehicle shall get off immediately and block the wheels with stones, skids and other objects to avoid backward sliding.

5. If the vehicle is on the way downhill and the speed is not too fast, you can try to use the hand brake to brake slowly and hard. Be careful not to pull too fast and too dead, otherwise the hand brake system may collapse and fall into greater difficulties.

If the handbrake doesn't work, try to grab the gear, use the "two foot throttle shift" mentioned above to shift into low gear, match the handbrake and stop the vehicle.

If you fail to grab the gear, you should timely find solid obstacles on the roadside, such as rocks, trees and earth slopes, hold the steering wheel tightly, and use the friction between one side of the vehicle body and it to slow down.

If there are no obstacles on the roadside that can rub and stop, and the speed is getting faster and faster, the driver should always pay attention to whistle, remind vehicles and pedestrians to avoid, and then find soft beaches, fields, etc., and forcibly stop the car. If an emergency shelter is designed on the road, the vehicle can be driven to the shelter to avoid danger.

It can be seen that once the braking failure of semi-trailer occurs during transportation, the risk coefficient is super high whether it is flat or uphill or downhill. Even if there are some experience that can be used for reference, no one can guarantee the actual operation effect. In contrast, it is more reliable to do a good job in daily maintenance and prevention.

Under normal circumstances, the braking of semi-trailer depends on the brake pad on the axle to hold the brake drum, or the caliper to clamp the brake disc, so as to generate friction and achieve the braking effect. Its material thickness, strength, wear resistance, thermal attenuation, wear and stable output are key indicators. Therefore, it is very important to choose a qualified axle.

Darong axle was born in Liangshan commercial vehicle production base and entered the market in 2001. It has a history of 21 years. Its brake drum and brake disc are made of integrated high-strength alloy materials with higher thickness. After thermal quenching and tempering treatment, it is stronger, more wear-resistant, higher heat capacity, efficient heat dissipation, not easy to soften or deform. With friction plates with less wear, it has more stable friction performance, durability and stable output, Fully avoid stagnation, frustration and eccentric wear. Darong's disc axle, drum axle, low flat axle, three wire six axle axle axle, special axle and other products are rich, complete models, and special sizes can provide customized services.