The shock absorber of a motorcycle plays a great role in driving, and when buying a car, many people will also be concerned about the configuration of a car on the shock absorber. Structurally speaking, the motorcycle shock absorber is divided into vertical and inverted, most of the riders know that the same level of inverted shock absorber has absolute advantages, but if you want to ask the reason, I am afraid most of the riders will be at a loss. Today, we will analyze in detail what are the differences between the two, and whether it is better than positive subtraction.

To understand the advantages of backward reduction, we must first understand its structural principle, whether positive or backward reduction, it must be composed of the following parts: shock absorber outer cylinder, inner cylinder, spring, damper, oil seal, dust cover, and in order to connect with the body, the upper and lower Samsung plate is indispensable.

Upper three-star plate

This glasses-shaped thing is the upper Samsung plate, also known as the upper link plate. Its left and right ends are clamped with two shock absorber upper ends, and are connected with the frame by bearings. In off-road vehicles, ADV, and most street cars, the upper Samsung is also commonly used as a fixed end of the handlebars.

Lower triple plate

The lower three-star plate has a similar function to the upper three-star plate design, jointly holding the front shock absorber and connecting with the frame. In terms of design, the lower Samsung plate is usually thicker than the upper Samsung because it has to bear a lot of force, and is directly connected to the column of direction, and then installed on the frame through a larger bearing, and some off-road vehicle fenders are installed on the lower Samsung.

Front shock absorber outer barrel

The outer cylinder and the inner cylinder can carry out relative movement, and the oil seal can prevent the shock absorbing oil from leaking out. In addition, the outer cylinder of the positive vertical front reduction must also be designed with a mounting hole for the brake caliper and a mounting hole for the front axle to achieve its role of supporting the car. On the contrary, the inverted front is reduced because the outer cylinder is on the top and the inner cylinder is on the bottom, and the outer cylinder does not have this design, and the caliper and the front wheel are installed on the inner cylinder.

Front shock absorber inner barrel

Whether it is positive reduction or reverse reduction, the inner cylinder will be subjected to surface treatment such as electroplating, in order to increase the surface hardness, reduce friction resistance and damage, and achieve the function of rust prevention. In the appearance, it will show a mirror-like luster, and some inner tubes will be plated with gold and brown, which looks quite dazzling.

Oil seal, dust cover

Oil seal is a very important mechanical component, which is connected with the outer cylinder and the inner cylinder to prevent the leakage of shock absorbing oil. A dust-proof cover is also installed on the oil seal to prevent dust or soil from entering the oil seal and scratching the oil seal and inner cylinder surface. However, some competitive vehicles in pursuit of a smoother effect, as well as lightweight performance, will not install dust cover.

The front shock absorber for the motorcycle, in addition to supporting the weight of the car, dealing with vibration, but also shoulder the steering function, so the strength of the shock absorber is absolutely the control and safety of the car. In addition, by adjusting the position of the upper and lower Samsung grip shock absorber, the body height and front Angle can also be changed to meet different needs and control performance.

Inverted front shock absorber

In the 1990s, a large number of inverted shock absorbers began to appear in production cars, and its shape is very similar to positive reduction, but the inner and outer tubes are placed upside down, which is why the name reverse reduction is derived. In terms of performance, reversing has higher overall rigidity and more sensitive shock absorption effect, and has gradually become the main equipment of performance vehicles since the late 1990s. Nowadays, whether it is imitation racing cars, supercars, off-road vehicles or sports street cars, most of them use reverse damping as the front shock absorber.

Size reduction

In the vertical front shock absorber, the diameter of the inner cylinder is the focus of design, such as the SUZUKI GSX1400 front shock absorber in order to cope with the strong car weight, and the rigidity required for high-speed riding, there has been a diameter of 46mm large inner cylinder, not only the manufacturing cost has increased sharply, the weight of the shock absorber can not be controlled. When evolving from positive reduction to reverse reduction, if the required rigidity is the same, then the diameter of the inner cylinder can be reduced, which is the relative advantage of the inverted shock absorber.

Rigidity increase

Rigidity has always been one of the selling points of downsizing, which can be more rigid than traditional positive downsizing under the same inner cylinder diameter design. Therefore, under the same rigid demand, the diameter of the reduced inner cylinder can be smaller, so the overall weight of the shock absorber is lighter. The tire by the ground from all directions of the impact, will be the first to pass to the front shock absorber, through the lever principle, the following three as the fulcrum, then the closer to the fulcrum of the torque will be greater, so the thicker the outer cylinder on the top, will get better shock rigidity.

Under the same conditions, the rigidity of the decrement is stronger

Reduced unsprung mass

The unsprung mass is the mass below the spring in the shock absorber. In the reverse damping, the inner cylinder is designed to the lower half of the front reducer, except that the diameter of the inner cylinder can be smaller, and the mass is also lighter than that of the thicker outer cylinder. In the actual test, the vehicle carrying reverse damping can make the shock absorber work more sensitive, which is also the reason why most cars that emphasize performance use reverse damping!

Finally, let's make a brief summary of the two shock absorbers. The advantages of positive reduction are: relatively simple structure, easy maintenance and disassembly, and low cost. The advantages of reversing are: strong rigidity and light unsprung weight are conducive to vehicle control.

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