Low-bubble spiral flow channel damping suspension shock absorber

Abstract

The invention relates to the technical field of vehicle shock absorbers, in particular to a low-bubble spiral flow channel damping suspension shock absorber. A piston (3) is provided with two annular through holes, namely a first outer annular through hole (5) and a first inner annular through hole (6). A base (16) is provided with two annular through holes, namely a second outer annular through hole (7) and a second inner annular through hole (8). Spiral channels (15) are arranged in the first outer annular through hole (5), the first inner annular through hole (6), the second outer annular through hole (7) and the second inner annular through hole (8) respectively. The lower end of the first outer annular through hole (5) and the lower end of the second inner annular through hole (8) are provided with one-way valves (9) for preventing damping fluid from flowing downwards, and the upper end of the first inner annular through hole (6) and the upper end of the second outer annular through hole (7) are provided with one-way valves (9) for preventing the damping fluid from flowing upwards. The suspension shock absorber can be adapted to different loads and road conditions and is not prone to generating air bubbles.

Description

technical field [0001] The invention relates to the technical field of automobile shock absorbers, in particular to a low-bubble spiral channel damping suspension shock absorber. Background technique [0002] The shock absorber is the main component that generates damping force, and its function is to quickly attenuate the vibration of the car, improve the ride comfort of the car, and enhance the adhesion between the wheel and the ground. In addition, the suspension shock absorber can reduce the dynamic load of the body part and prolong the service life of the car. [0003] A traditional suspension shock absorber includes an oil storage cylinder, a working cylinder arranged in the oil storage cylinder, a piston rod extending into the working cylinder, and a piston arranged at the lower end of the piston rod. Two annular through holes are arranged on the piston, and the There are also two annular through holes at the bottom of the working cylinder, and one end of the four an...

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Problems solved by technology

[0004] 1) When the pressure of the pressurized liquid reaches a sufficient pressure, the pre-pressed elastic sheet can be "punched" (leakage is not counted), so that the shock absorber is prone to inconsistent damping force under different loads and road conditions, such as : ①Loading: When the pre-pressure of the pre-pressed elastic sheet meets the requirements of heavy-duty vehicles, it will be too hard when it is unloaded; ②Road conditions: When the pre-pressed elastic sheet meets the requirements of high-speed driving, it will be too hard when driving on bad roads. When the car body shakes slightly and other road condition defects appear, the requirements cannot be met;

[0005] 2) When the pressurized liquid "rushes out" of the channel, although high-speed friction occurs with the liquid in the cavity, a large amount of heat is generated, and the vibration energy can be converted into heat energy, and the vibration energy can be consumed by dissipating it, but Due to the high pre-pressure of other elastic sheets, the liquid flows out in the form of splashing, so a large number of bubbles are generated, but this mechanism will lead to two other defect forms: ①The appearance of a large number of bubbles will make the liquid dissipate heat Such excessive liquid temperature not only deteriorates the oil quality, but also easily damages other accessories, such as: rubber seals, plastic structural parts, etc., and the so-called "cavitation" phenomenon at the outlet; ② bubbles are expansive, Therefore, it is very easy to block the channel, and at the same time, the bubbles are compressible. In these two cases, the phenomenon of "empty travel" in the industry is very likely to occur due to lack of fluid, which makes the shock absorption ineffective.

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