CN-224214621-U - Superimposed semi-air suspension damper

CN224214621UCN 224214621 UCN224214621 UCN 224214621UCN-224214621-U

Abstract

The utility model belongs to the technical field of automobile shock absorbers, and particularly relates to a superimposed semi-air suspension shock absorber which is characterized by comprising a proportional cylinder body, a vacuum partition plate, an upper cylinder spring, an upper cylinder piston, a lower cylinder piston and a sealing guide post, wherein the proportional cylinder body comprises the upper cylinder body and the lower cylinder body, the upper cylinder piston is arranged in the upper cylinder body, a sealed air cavity is formed between the top of the upper cylinder piston and the upper cylinder body, the vacuum partition plate is fixedly arranged below the upper cylinder piston, the upper cylinder piston is fixedly connected with the sealing guide post downwards in the middle, a negative pressure cavity is formed between the upper cylinder piston and the vacuum partition plate, the sealed air cavity and the negative pressure cavity form a compound air spring, the upper cylinder spring is arranged between the top of the upper cylinder piston and the upper cylinder body, and hydraulic oil is filled between the lower cylinder piston and the vacuum partition plate. The utility model has the beneficial effects that the air spring, the metal spring and the hydraulic oil are adopted to form the composite damping body structure, so that the kinetic energy can be quickly absorbed, the kinetic energy can be quickly released, and the comfortable driving experience is improved.

Inventors

XIE YUFENG
Zhao Chuantong
TIAN XIAOWEI
XIE ZIXUAN
ZHAO HANRU

Assignees

鞍山市梓瑄科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250521

Claims (7)

1. A superposition type semi-air suspension shock absorber is characterized by comprising a proportional cylinder body, a vacuum partition plate, an upper cylinder spring, an upper cylinder piston, a lower cylinder piston and a sealing guide column, wherein, The proportional cylinder body comprises an upper cylinder body and a lower cylinder body, and the inner diameter ratio of the upper cylinder body to the lower cylinder body is 2:1-3:1; An upper cylinder piston is arranged in the upper cylinder body, a closed air cavity is formed between the top of the upper cylinder piston and the upper cylinder body, a vacuum partition plate is fixedly arranged below the upper cylinder piston, the upper cylinder piston is fixedly connected with a sealing guide column downwards in the middle, a negative pressure cavity is formed among the upper cylinder body, the upper cylinder piston, the sealing guide column and the vacuum partition plate, the closed air cavity and the negative pressure cavity form a composite air spring, and an upper cylinder spring is arranged between the top of the upper cylinder piston and the upper cylinder body; A lower cylinder piston is arranged in the lower cylinder body and is connected with the connecting seat through a support column, and a part of the shell of the support column is a rubber dust cover or a corrugated pipe dust cover; An oil inlet is arranged on the upper cylinder body, an electric control valve is arranged at the oil inlet, and hydraulic oil is filled between the lower cylinder piston and the vacuum partition plate.
2. The superimposed semi-air suspension damper of claim 1 wherein a seal ring is provided between the seal guidepost and the vacuum diaphragm.
3. The superimposed semi-air suspension damper of claim 1 wherein said lower cylinder piston is threadably connected to a strut, the top of which is connected to a damping assembly.
4. The superimposed semi-air suspension damper of claim 1, wherein the vacuum separator is provided with at least one check valve, and the direction of conduction of the check valve is from bottom to top.
5. The superimposed semi-air suspension damper according to claim 3, wherein the damping vibration absorbing assembly comprises a damping orifice plate and a rubber supporting plate arranged at the bottom of the damping orifice plate, the damping orifice plate and the rubber supporting plate are fixedly connected to the upper end of a sliding column, and a plane supporting table for pushing the sealing guide column is arranged at the top of the sliding column.
6. The superimposed semi-air suspension damper of claim 1, wherein the top sealing plate of the upper cylinder is provided with a circle of air holes, the bottom of each air hole is provided with a film pad, the bottom of each film pad is connected with the film bracket, and the film pad is an annular gasket.
7. The superposition type semi-air suspension damper according to claim 1, wherein a rubber pad and a bolt for connecting an automobile frame are arranged at the top of the upper cylinder body, the connecting seat is connected and matched with an axle, the connecting seat is arranged at the bottom of the lower cylinder body, the upper cylinder body is provided with an inflating valve, and a lower limit stop and an exhaust hole are arranged on the lower cylinder body below the lower cylinder piston.

Description

Superimposed semi-air suspension damper Technical Field The utility model belongs to the technical field of automobile shock absorbers, and particularly relates to a superposition type semi-air suspension shock absorber. Background The term "shock absorber" is a generic term in the automotive chassis industry, which is effectively a vibration damper. Shock absorbers are used in automobiles not only on suspensions, but also in other locations. For example, it is used in cabs, saddles, steering wheels, etc., and it can also be used as a bumper in a vehicle bumper. In the suspension system, the elastic element is impacted to generate vibration, so as to improve the running smoothness of the automobile, the shock absorber is arranged in parallel with the elastic element in the suspension, and the shock absorber is mostly a hydraulic shock absorber in the automobile suspension system, so that the working principle is that when the frame (or the automobile body) and the axle are subjected to vibration to generate relative motion, the piston in the shock absorber moves up and down, and oil in the cavity of the shock absorber repeatedly flows into the other cavity from one cavity through different holes. At this time, the friction between the hole wall and the oil and the internal friction between the oil molecules form damping force on vibration, so that the automobile vibration energy is converted into oil heat energy, and then absorbed and emitted into the atmosphere by the shock absorber. When the oil liquid channel section and other factors are unchanged, the damping force increases and decreases along with the relative movement speed between the vehicle frame and the vehicle axle (or the vehicle wheels), and is related to the viscosity of the oil liquid. The shock absorber and the elastic element bear the tasks of buffering impact and vibration, and the excessive damping force can deteriorate the elasticity of the suspension, and even damage the shock absorber connecting piece. The steering damper is a damping type damper installed in a steering system of an automobile, and has various structures, and is generally a cylinder type damper filled with viscous liquid inside, and has a structure similar to that of a suspension damper. The function of the brake is to prevent the steering wheel of the automobile from generating self-excitation shimmy or forced shimmy and also to prevent the brake from deviating. The steering damper is a damping damper installed in a steering system of an automobile, and is used for reducing the impact directly from an uneven road surface and the vibration of the steering system, and improving the steering performance. If power steering is used in the steering mechanism, the impact can be reduced and the vibration can be alleviated by using the power steering, so that the steering damper is not particularly used in practice. Since the birth of the mid-nineteenth century, air suspensions have undergone the development of a century, and have undergone various changes such as "pneumatic spring-air bag composite suspension→semi-active air suspension→central inflation/deflation suspension (i.e., ECAS electric control air suspension system)". It was applied to trucks, buses, cars and railroad cars by the fifties of the twentieth century. At present, the foreign high-grade buses almost all use air suspensions, the proportion of the heavy-duty trucks using the air suspensions is over 80 percent, and the application amount of the air suspensions on light automobiles is rapidly rising. Some cars are also increasingly mounted using air suspensions such as lincoln, benz300SE and Benz600 in germany, and the like. The use of air suspensions is almost the only choice for some special vehicles (such as instrument cars, ambulances, special military vehicles, and required container vehicles with high requirements for shock protection). While China is still in a starting stage, the air suspension system is only applied to some luxury buses and small heavy trucks and trailers. Generally, the softer the elastic damping element, the less energy is stored, the better the damping effect and the better the jolt damping effect. However, the elastic damping element is too soft in design and cannot provide good supporting force, and if the elastic damping element is too hard in design, energy storage through obstacles becomes large, and vibration is also large. The rigidity of the elastic damping element cannot be regulated in the current commercial automobile shock absorbers generally, and the current commercial automobile shock absorbers cannot meet the requirements of various road conditions or loads on the shock absorption effect. Disclosure of utility model The utility model aims to provide a superposition type semi-air suspension damper, which overcomes the defects of the prior art, adopts a composite damping body structure formed by an air spring, a metal spring and hydraulic oil, wherein the hydraulic o