There are many types of morning shock absorbers. The vast majority of motorcycles use cylindrical shock absorbers. Only a few use leaf spring structures. There are many types and types of cylindrical shock absorbers. Generally, they are divided into front shock absorbers according to the installation position. And rear shock absorber.
1. According to the direction of attenuation force: there are unidirectional shock absorbers and two-way shock absorbers.
2, according to load adjustment type: spring initial pressure adjustment type, gas spring type, installation angle adjustment type.
3. According to the structural form: there are telescopic tube type front * hydraulic shock absorbers (this is the most commonly used front shock absorber in motorcycles at present), rocker arm shock absorbers, rocker lever vertical center shock absorbers, Rocker lever tilt center shock absorber.
4. According to the working position of the cylinder: there are inverted shock absorbers (that is, the cylinder position is above and the piston rod is below), and upright shock absorbers (the cylinder position is below and the piston rod is above).
5. According to the working medium: spring-type shock absorber, spring-air damping type shock absorber (due to the limited damping force of air, the damping effect is also not ideal, and it is generally only used for light motorcycles with low speed. Shock absorber), hydraulic damping shock absorber, oil-air combined front * shock absorber, nitrogen-filled hydraulic shock absorber.
Telescopic tube type front hydraulic shock absorber:
1. The telescopic front is connected with the front wheel and the frame, and it not only plays a part of the skeleton support function, but also functions as a shock absorber. With the mutual expansion and contraction between the handle tube and the sleeve, the oil in the front flows through the small hole provided in the partition wall.
2. When the handle tube is compressed, as the handle tube moves, the oil in the B chamber flows to the C room through the small hole in the handle tube after being compressed.
3. At the same time flow to the A room through the free valve. As the fluid flows, the compression force is attenuated by the resistance.
4. When the compression stroke is approaching the limit, the conical oil seal at the end of the handle tube will be inserted, thereby closing the oil passage in the B room.
5. At this time, the oil pressure in Room B sharply rises, leaving it in a closed state. This limits the stroke of the handle tube and effectively prevents instant mechanical collisions between the moving parts on the front *.
6. When the handle tube is stretched (that is, rebounded), the oil in the A chamber flows to the C chamber through a small hole provided in the upper part of the front piston (* near the piston ring).
7. At this time, the resistance to the fluid flow attenuates the extension tension.
8. When the extension stroke is approaching the limit, the elongation of the rebound spring absorbs the vibration energy, and in this process, the oil is added to the B room through the small hole in the front * piston, preparing for the next work .
Hydraulic damping type rear shock absorber
1. The hydraulic shock absorber is the most common shock absorber currently used in motorcycles. The structure of the hydraulic shock absorber is basically similar to that of the suction pump, except that the upper end of the steel body of the hydraulic shock absorber is closed, while the There are small holes in the valve.
2. When the rear wheel encounters bumps on the road, the cylinder moves upwards, and the piston moves relatively downward in the inner cylinder. At this time, the piston valve is flushed open upward, and the oil on the lower side of the piston in the inner cylinder cavity flows to the upper side of the piston without any resistance.
3. At the same time, this part of oil also flows into the oil cavity between the inner and outer cylinder through the small hole on the bottom valve.
4. This effectively attenuates the impact load of the bumpy road on the vehicle.
5. When the wheels fall over the raised ground, the cylinder will move downwards, and the piston will move upwards relative to the cylinder.
6. When the piston moves upward, the oil flushes the valve at the bottom and flows to the inner cylinder. At the same time, the oil on the upper side of the inner cylinder piston flows down through the small hole in the piston valve.
7. At this time, when the oil flows through the small hole, it will be subject to great resistance, so it has a better damping effect and plays the purpose of damping.