Is the double disc brake of electric vehicle better or the front disc brake and the rear drum brake?

when it comes to the braking system of electric vehicles, many people know that there are two kinds of disc brakes and drum brakes. In the early days of electric vehicles, most electric vehicles used drum brakes. Up to now, they have gradually changed to "front disc and rear drum" configuration, and the rear wheel does not use disc brakes because of the cost problem. Of course, some enterprises use front and rear disc brakes. So, does this prove that the disc brake must be better than the drum brake? Now, let's hear what the ten-year mechanic has to say!

1. What is a drum brake? What are its advantages and disadvantages?

as the name implies, drum brake is a braking device that uses the static brake pads in the brake drum to rub the brake drum that rotates with the wheel, so as to generate friction and reduce the rotation speed of the wheel.

Its advantages are also obvious. Because the drum brake manufacturing technology is low, and it was first used in the brake system, the manufacturing cost is lower than that of the disc brake. In addition to low cost, under the same diameter, the absolute braking force of drum brake is greater than that of disc brake, and the drum brake can increase the braking force by the forward rotation of the wheel.

of course, drum brakes also have disadvantages, that is, when driving at a high speed, the braking part is prone to heat exhaustion due to heat accumulation, and the braking force is weakened, while disc brakes are well ventilated, and heat dissipation is fast, so it is not easy to cause heat exhaustion, which is more affected by external environmental factors.

second, what is a disc brake? What are its advantages and disadvantages?

Disc brake is called disc brake, and it is composed of a brake disc connected to the wheel and a brake caliper at the edge of the disc. The braking principle is that high-pressure brake oil pushes the brake block to clamp the brake disc, thus producing a braking effect.

compared with the drum brake, the disc brake has the characteristics of fast heat dissipation, light weight, rapid braking and convenient adjustment, and has better high temperature resistance under high load, stable braking effect and less influence from external environmental factors. In addition, the disc brake is pincer-type, the brake shoe and the disc are in plane contact, the contact surface is large, and the braking is rapid, which is suitable for frequent braking and generally does not need to be adjusted. Drum brake pads and brake drums are in curved contact, from point to surface, and the braking efficiency is relatively low.

However, the disc brake also has its disadvantages. Firstly, the manufacturing cost is obviously higher than that of the drum brake, and in addition, its braking force is not as good as that of the drum brake.

As the main weapon for ordinary people to travel, electric vehicles have become an indispensable means of transportation. As a braking system that affects the safety of life and property, whether it is disc brake or drum brake, putting the safety of consumers first is the way out for the future development of enterprises.

Double disc brake and front disc brake and rear drum brake of electric vehicles have their own characteristics and shortcomings. The advantage of disc brake is that the braking sensitivity is relatively high, and the vehicle can stop instantly. Its disadvantage is often that there is a problem with this sensitivity! Some people habitually hold the brakes, and if it is not good, they will fall down with the vehicle, and the vehicle will also hurt people.

The advantage of drum brake is that the sensitivity of new brake is slightly lower than that of disc brake, and the brake is also sensitive enough. Let people use habitual brakes for many years to perform better. Its disadvantage is that it wears quickly, and its sound is not very sensitive in the later stage.

① the brake is raised, but its service life has been more than 1 years, and it is used in front of most vehicles. For example, early simple electric bicycles, medium-sized models and electric motorcycles are all in use. Generally, it is on the rear wheel motor, and the two-wheeled vehicle is used most in the early small three-wheeled, especially the one with people.

as long as it is installed reasonably, the braking is also sensitive, and the brake discs are also thickened in production. According to different manufacturing processes and different service life, the service life of brake pads manufactured in the early days is longer than that manufactured in recent years, and the difference lies in the raw materials used for manufacturing and processing.

② Drum brake, the manufacturing process is a little different from that of drum brake. The biggest difference is that the brake pads can be removed and replaced flexibly, but it is not easy to remove and install the brake pads, and few people are doing it when replacing the brake pads. The reason is that it is troublesome to disassemble and install, and there are not too many suitable brake pads to be replaced, which can only be used better by the whole set of integrated replacement and installation.

① the disc brake is driven by oil pressure, and the brake pad of the lower pump hugs the disc brake disc to form braking, which can form a system in an instant, that is, you must pay attention to it when braking. Especially for the newly installed disc brakes of new cars, you should gently stop moving, and don't pinch them up like a drum brake. If the driver doesn't master them well, he will easily fall and hurt himself.

② The brake rocker arm is tightened by the brake pull rope in both the rising brake and the drum brake, so that the brake pad rises to form the brake. The different manufacturing processes of several brakes have the same effect, and its braking principle is also the same.

to sum up, the double-disc killing of electric vehicles is better in automatic soul, that is, you should master the skills in operation and gently pinch the brakes, so that you can form a brake without stopping the wheels in an instant, which will also give people a buffer time.

The front disc brake and the rear drum brake are used more often, which is several times more than the double disc brake, so the effect is also different. Manufacturers think so, because people have gradually formed a habit of pinching the brakes from riding bicycles. Handfuls of brakes are pinched back to make the vehicle brake, but this kind of brake has a buffer time and buffer distance. If you want to brake sensitively, pinch the front disc brake, and if you want to operate habitually, use the rear drum brake. This configuration will be more user-friendly and easy to operate.

Hello, I'm Hu Zhizhi from Tianneng Battery After-sales Service Department. My electric car is a five-star Diamond Leopard extended medium sand double disc brake. My opinion is that the double disc brake is good.

my car is a 6/28 large battery, and its own weight is relatively large. The maximum speed pleasure table (the speed displayed on the dashboard) can reach 63km/h, and the actual speed is about 45 km/h.. Young people ride faster, too. I think the double disc brake is ok. Every time the brake is braked suddenly, it's an emergency brake! And I don't swing my tail and slide much. I used the front hub and rear disc brake to deliver the goods. This one doesn't dare to run too fast, and it is easy to swing its tail when braking suddenly, and the sliding distance is far, which is almost the same as mine.

We usually use the rear brake more, but the front brake is not used very much. If the front brake is too smart, it is easy to shake your head and fall. I've seen a lot of front discs and rear hubs, but they don't work very well. They all rely on the rear hub brake, and the front brake is either not very flexible or not very useful.

Another important reason is that the front disc brake is just on the right side with the steering wheel. I think the original intention of the design is to make the rear disc brake play the main braking role, and the front disc brake plays the auxiliary role, but the hub brake can't be killed quickly. If the front disc brake is used quickly, it will be unsafe, and if it is not used, it will not be as good as the double hub brake. Moreover, it is not cheap and it feels very tasteless.

another point is that since we have a disc brake, we might as well buy a double disc brake with more money. After using the hub brake for a period of time, it feels a little tight and it is hard to hold. Many cars have this problem, and it is not possible to add oil and rust remover.

but no matter how good the brakes are, you should still drive at a medium speed, and safety comes first.

first of all, electric vehicles are a general term, and there are three criteria for subdivision! The front disc and rear drum brake configuration is already the most basic configuration of electric motorcycles and light electric motorcycles, and some high-equipped electric bicycles also have this configuration! If we say which kind of brake is good, then it is necessary to talk about the comprehensive comparison of the two kinds of brakes in detail.

1. Braking performance, first of all, for the speed of the current electric vehicle, although the front disc is full behind to cope with the use of braking deceleration of the current electric vehicle! However, the braking response of the disc brake is quick and the feel is easier, while the braking response of the drum brake is slightly delayed and the feel is heavier. The brake of front disc and rear drum in emergency braking is also in line with the control stability of vehicle movement because of the braking force relationship, that is to say, the forward inertia of vehicle braking is large, which brings higher braking requirements for front wheels and weaker braking force for rear wheels. In emergency braking, the braking force distribution is generally the first seven and the last three! Therefore, under the limit of brake lock, the front wheel is more suitable for using disc brakes, and the inertia braking force is more demanding and the response is faster! However, when the rear wheel is locked when the adhesion between the tire and the road surface becomes low during braking, it will come early, so the drum brake can also meet the deceleration function of ordinary electric vehicles and light electric motorcycles, but it is very necessary for the rear disc brake of high-speed electric motorcycles.

2. Development direction: In recent years, the comprehensive quality requirements of electric vehicles have been continuously improved. At the same time, due to the promulgation of the new national standard, electric vehicles have been subdivided into three parts: electric bicycles, light electric motorcycles and electric motorcycles! Then, for the latter two models, the front and rear disc brakes will be gradually used, because the speed of the light electric motorcycle is nearly 5km/h, and the braking effect of the front and rear disc brakes is better than that of the front disc and the rear drum. The speed of electric motorcycle is above 5km/h, so it is the best choice to choose front and rear disc brakes. At the same time, large-size brake discs and two-way opposed double-piston calipers have also been applied. In the future, CBS front and rear brake linkage, two-way multi-piston calipers and even high-end disc brake configuration with ABS anti-lock function will appear according to the speed increase!

3. Riding experience. If you say which kind of brakes are good, then I think the front and rear double disc brakes are better. The problem of braking force distribution has also been mentioned earlier. Anyone who has ridden for a long time knows that it is very important to control braking force. Rich riding experience in various road conditions determines your grasp of braking control ability. Don't say that the rear disc brakes are easy to lock up, which is a manifestation of your inexperience in riding or that you have not fully mastered the disc brake system. At the same time, the function of EBS electromagnetic brake of electric vehicle will make you better control the rear disc brake. Compared with the front disc and rear drum brake, the front and rear disc brakes are easier to control skillfully and the experience is easier.

Although front disc brake and rear drum brake still exist in a large number at present, from the development direction of electric motorcycles, front and rear disc brakes+＋CBS ＋ABS will surely become the basic configuration of high-end electric motorcycles. I believe we will be lucky enough to experience the braking system of electric motorcycles with higher configuration by then.

the Aima Inc. I bought six years ago is the front and rear disc brakes. The reason for buying it is very simple. The drum brake of the previous electric car was used downhill. Especially afraid to take people downhill. Now six years have passed, and the front disc brake has been replaced three times. The brake pads of the rear disc brake were replaced many times and the brake calipers were replaced. Brake pads and brake calipers are replaced by themselves. When I went to the electric car repair shop, I said that there were no accessories, so I bought brake oil at a omnipotent treasure. Brake pads, brake calipers, and replacement of the rear brake hand pump. The braking distance is shorter than that of previous electric vehicles. You don't have to worry about stopping the car when you go down a long slope. It is recommended to buy front and rear disc brakes when buying an electric car. Electric cars can be put into low gear when going downhill than motorcycles, and they all rely on braking.

The braking effect is good, and it is easy to lock the motorcycle. Some people who have never fallen and measured the slip have the conditions to buy a motorcycle.

There is not much difference between them. The original disc brakes used in electric vehicles are all from staple goods, so the price, weight and speed limit determine that their performance can't be compared with that of motorcycle disc brakes, which means that the braking effect of double disc brakes and front disc drums is similar. It is more likely that the disc brake oil pump is not well modulated, too sensitive and easy to lock. The disadvantage of drum brake is that the brake becomes softer and softer after long-term use, and the braking distance becomes longer, but it will take at least 5 kilometers after this long time. The high-performance disc brake that I modified at a high price is not in the scope of discussion. I mean the original disc brake. Having said that, I still choose the car with double disc brakes, because it looks good, hahaha, that's all, I can't think of it.

Of course, it's a double brake.

It's definitely a double brake. The drum brake is easy to break, and the brake is not working well. The disc brake is good and not easy to break, and it takes much longer than the drum brake.

The front and rear disc brakes are definitely good.

The front disc and the rear drum are designed to control the cost. . .

the disc brake is easy to maintain, even if muddy water enters, it just makes a little noise.

The drum brake can't stop when muddy water enters. The brakes slipped.

the braking force of disc brake is relatively linear. And it's very sensitive.

Disc brakes become tight after a long time. It's just an oil change and exhaust.

Drum brakes are basically impossible to do.