Aluminum alloy suspension front fork
The front fork component is located in the front part of the bicycle structure. Its upper end is connected with the handlebar part, the frame part is matched with the front tube, and the lower end is matched with the front axle part to form a bicycle guiding system.
Rotating the handlebars and the front fork can change the direction of the front wheel, which serves as a guide for the bicycle. In addition, it can also play a role in controlling the driving of the bicycle.
The force of the front fork component is of the cantilever nature, so the front fork component must have sufficient strength and other properties.
Bicycle fork category
1. Spring Fork
It is the oldest and most common spring used in MOTO. The stiffness of the spring, the so-called spring rate (Spring Rate), represents the ratio of force to deformation. Under the principle of not exceeding the load, a simple coil spring has a fixed elastic coefficient under different stress states and will not be affected by the ambient temperature. After painting or lubrication, the stability and durability are high. But the only disadvantage of the wire spring is the weight, so higher-end front forks have begun to use lighter but more expensive titanium alloy springs.
2. Air pressure
Because the air is light, the use of air as a spring should be the most suitable for bicycles, and if a different hardness is required, there is no need to replace the spring, just increase or decrease the air pressure. However, the use of gas springs must have more sophisticated technology, and the high-pressure gas must be completely sealed. Once the gas pressure is lost, it will not work at all. Therefore, the early gas spring had a sealing problem, and even suddenly lost all the air pressure during use. Recently, this problem almost no longer occurs. But just like a fetus, it doesn’t say that there is no need to pump up occasionally. Traditional pneumatic front forks also have the so-called stiction problem, which is that the Seal (oil seal) that seals the high-pressure air is very tight, and it seems to be a little stuck. At the beginning of the compression, a large external force is required, so it responds to small vibrations. Not very keen. Now the use of Negative Spring has basically overcome this problem. The use of gas springs on mid-stroke suspension forks has been quite affirmed, but they cannot replace coil springs on long-stroke front forks.
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