【正文】 墊壓向一側(cè)或自行車輪輞的內(nèi)側(cè)邊緣。 自行車制動實際上 只有兩個類型 自行車剎車制動蹄上有相同的摩擦點，并有兩個摩擦點。 鼓式制動器 單前沿 下一個，更加復雜的類型的制動是鼓式制動器。兩個半圓形的剎車片裝在里面連接一個旋轉(zhuǎn)的車輪的鼓。這造成了摩擦，產(chǎn)生熱量，轉(zhuǎn)移動能，這將使車減速。制動器在這種情況下是藍色橢圓形的對象。當松開剎車， 回位彈簧從制動鼓的表面拉回剎車片。 單前沿 是指實際接觸的旋轉(zhuǎn)鼓輪制動 蹄部件的數(shù)量。單前沿就是部分剎車片的術(shù)語，那些接觸制動鼓，在單一制動情況下的方法，在最接近制動器的襯墊。這剎車片向外壓和制動襯墊的最初接觸制動鼓的部分剎車片就是前沿。后沿的制動蹄片與制動鼓幾乎沒有接觸。由于制動鼓向后旋轉(zhuǎn)，前沿的剎車片成為了后沿，因為制動 不會咬合。踩下剎車時，剎車片在兩個點向外壓。因為有兩個剎車蹄，那里有兩個剎車片，這意味著有兩個邊沿。 盤式制動器一些背景。 蘭徹斯特的專利。直到 1949 盤式制動器的量產(chǎn)車上使用。他原先的設計雖然有點缺陷 制動器持續(xù)不到一年。（所有事情，在 90 年代的汽車制造商都重新作為 新型 ）。運動型車輛具有更高的速度需要更好的制動減速，所以您會明白盤式制動器在這些車上的使用。re travelling at speed, your vehicle has kiic energy. When you apply the brakes, the pads or shoes that press against the brake drum or rotor convert that energy into thermal energy via friction. The cooling of the brakes dissipates the heat and the vehicle slows down. It39。re probably familiar with the term brake fade, used to describe what happens to brakes when they get too hot. A good example is ing down a mo untain pass using your brakes rather than your engine to slow you down. As you start to e down the pass, the brakes on your vehicle heat up, slowing you down. But if you keep using them, the rotors or drums stay hot and get no chance to cool off. At some point they can39。t stay between the pad and the rotor, it forms a thin layer between the two whilst trying to escape. The pads lose contact with the rotor, reducing the amount of friction and voila. Complete brake fade. The typical remedy for this would be to get the vehicle to a stop and wait for a few minutes. As the brake ponents cool down, their ability to absorb heat returns and the next time you use the brakes, they seem to work just fine. This type of brake fade was more mon in older vehicles. Newer vehicles tend to have less outgassing from the brake pad pounds but they still suffer brake fade. So why? It39。t) when you step on the brakes, the air bubbles press instead of the fluid transferring the motion to the brake calipers. Voila. Modern brake fade. So how do the engineers design brakes to reduce or eliminate brake fade? For older vehicles, you give that vapourised gas somewhere to go. For newer vehicles, you find some way to cool the rotors off more effectively. Either way you end up with crossdrilled or grooved brake rotors. While grooving the surface may reduce the specific heat capacity of the rotor, its effect is negligible in the grand scheme of things. However, under heavy braking once everything is hot and the resin is vapourising, the grooves give the gas somewhere to go, so the pad can continue to contact the rotor, allowing you to stop. The whole understanding of the conversion of energy is critical in understanding how and why brakes do what they do, and why they are designed the way they are. If you39。ll see the front wheels have huge scoops inside the wheel pointing to the front (see the picture above). This is to duct air to the brake ponents to help them cool off because in F1 racing, the brakes are used viciously every few seconds and spend a lot of their time trying to stay hot. Without some form of cooling assistance, the brakes would be