CN217761842U - Air spring and shock absorber - Google Patents
Air spring and shock absorber Download PDFInfo
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- CN217761842U CN217761842U CN202220965291.8U CN202220965291U CN217761842U CN 217761842 U CN217761842 U CN 217761842U CN 202220965291 U CN202220965291 U CN 202220965291U CN 217761842 U CN217761842 U CN 217761842U
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Abstract
The application discloses air spring and bumper shock absorber. The air spring comprises a piston and a damping spring, wherein the damping spring can be in contact with the piston in a working stroke on the outer surface of the piston, the working stroke is between a lower limit point and an upper limit point, a compensation point is further arranged above the upper limit point on the outer surface of the piston, a compensation stroke is arranged between the upper limit point and the compensation point, and the slope of the compensation stroke is at least partially greater than that of the working stroke. According to the air spring, the riding comfort of the automobile can be improved.
Description
Technical Field
The present application relates to the field of motor vehicles, in particular to an air spring and a shock absorber having such an air spring.
Background
The automobile has become a part of people's life gradually, people hope that the automobile has good riding comfort to slow down jolt of the automobile running on an uneven road surface as a transportation tool, and hope that the automobile has good operation stability to prevent the automobile body from inclining and shaking when the automobile starts, accelerates, decelerates, brakes and turns over at high speed, and the quality of an automobile suspension system plays an important role in guaranteeing the riding comfort and the operation stability. An automotive suspension system is an elastic structure connecting a wheel and a vehicle body, and one of main components thereof is a shock absorber.
The stiffness and strength of the shock absorber play a significant role in ensuring ride comfort and handling stability in an automotive suspension system. The existing shock absorber uses an air spring to buffer, damp and keep the posture of a vehicle body stable. The air spring is disposed between a chassis and a body of the vehicle. The air spring comprises a piston and a damping spring, and the damping spring is easy to age after being used for a long time.
Therefore, it is necessary to sufficiently study the existing problems or disadvantages including those described above so as to improve them.
SUMMERY OF THE UTILITY MODEL
The application provides an air spring, it can improve the riding comfort of car.
According to one aspect of the application, the air spring comprises a piston and a damping spring, wherein the damping spring can be in a working stroke at the outer surface of the piston to be in contact with the piston, the working stroke is between a lower limit point and an upper limit point, a compensation point is further arranged above the upper limit point of the outer surface of the piston, a compensation stroke is arranged between the upper limit point and the compensation point, and the slope of the compensation stroke is at least partially larger than that of the working stroke.
According to one aspect of the present application, an air spring is provided in which the length of the working stroke is determined by the adjustment height of the air spring.
According to one aspect of the present application, an air spring is provided, the adjustment height of which is determined by the overall vehicle height.
According to one aspect of the present application, the air spring is provided, wherein the slope of the compensation stroke is greater than the slope of the working stroke at the upper limit point.
According to one aspect of the present application, an air spring is provided in which the slope of the compensation stroke is greater than the slope of the working stroke.
According to one aspect of the present application, an air spring is provided in which the inclination of the compensation travel is 1 to 30% greater than the inclination of the working travel at the upper limit point.
According to one aspect of the present application, an air spring is provided in which the inclination of the compensation travel is 2-3% greater than the inclination of the working travel at the upper limit point.
According to the air spring provided by one aspect of the application, the damping spring is a rubber leather bag.
The present application also proposes a shock absorber with such an air spring. Since the shock absorber is provided with the air spring according to the present application, it can have advantages as described above.
According to one aspect of the present application, a shock absorber is provided that further includes a shock absorber cylinder, and the air spring is disposed around the shock absorber cylinder.
The beneficial effect of this application includes: the inclination of the compensation travel is at least partially greater than the inclination of the working travel, so that the stiffness degradation of the air spring caused after a prolonged use of the damping spring can be at least partially compensated, and the ride comfort of the vehicle is improved.
Drawings
The disclosure of the present application is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the application. In the drawings, like reference numerals are used to refer to like parts, unless otherwise specified. Wherein:
FIG. 1 schematically illustrates an air spring according to one embodiment of the present application.
Detailed Description
It is easily understood that according to the technical solutions of the present application, a person having ordinary skill in the art can propose various alternative structures and implementations without changing the spirit of the present application. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present application, and should not be construed as being all of the present application or as defining or limiting the technical solutions of the present application.
An embodiment according to the present application is shown in connection with fig. 1, where it can be seen that: the air spring comprises a piston 1 and a damping spring 2 which can be brought into contact with the piston in a working stroke at the outer surface of the piston, the working stroke being between a lower limit point a and an upper limit point B. And a compensation point C is also arranged above the upper limit point of the outer surface of the piston, a compensation stroke is arranged between the upper limit point B and the compensation point C, and the slope of the compensation stroke is at least partially greater than that of the working stroke. In the cross section shown in the figure, a coordinate system is established in the plane, assuming positive x-axis direction upward and positive y-axis direction leftward, and "slope" herein is understood in the coordinate system.
During the operation process of the air spring, the relative position of the air spring is changed. Specifically, the free end of the damping spring carries the free end of the piston up and down along the damper cylinder of the damper, during which the damping spring is in contact with the outer surface of the piston, and the contact point is in change. This process may also be understood as the damping spring "rolling" at the outer surface of the piston. The set of contact points of the damping spring with the piston at the outer surface of said piston is the working stroke. The lower limit point is a lowermost contact point of the damping spring and the piston at an outer surface of the piston; the upper limit point is the uppermost contact point of the damping spring with the piston at the outer surface of said piston. That is, the contact range of the damping spring with the piston is between an upper limit point and a lower limit point at the outer surface of the piston.
It should be noted that the positions of the "upper limit point" and the "lower limit point" of the working stroke are defined corresponding to the orientations in the drawings, and they are relative concepts, and therefore may be changed accordingly according to the positions. In other application scenarios, the relative positions of the "upper limit point" and the "lower limit point" may be swapped, e.g., with the "upper limit point" below and the "lower limit point" above. These and other directional terms should therefore not be construed as limiting terms. Furthermore, "above the upper limit point" is also understood to mean in the direction away from the lower limit point at the upper limit point.
The slope of the working stroke between the lower limit point a and the upper limit point B is, for example, increased from the lower limit point a to the upper limit point B, so that the reduction in stiffness due to the extension or expansion of the damping spring is at least partially compensated.
According to one embodiment of the application, the length of the working stroke is determined by the adjustment height of the air spring. In addition, the height of the air spring is determined by the height of the whole vehicle. One of the functions of the air spring is to adjust the height of the whole vehicle, the height of the whole vehicle is firstly designed at the beginning of the development of the whole vehicle, the adjustment height of the air spring is determined after the target value of the height of the whole vehicle is determined, and accordingly the working stroke of the air spring, namely the working stroke of the damping spring at the outer surface of the piston is also determined. That is, after the full vehicle height is determined, the working stroke of the damper spring at the outer surface of the piston is unique and fixed. The subsequent air spring design operations, such as commissioning and verification of the stand, are carried out around this operating path. Under the condition that the requirement on the height of the whole vehicle is not changed, the working stroke is not changed.
The inventors have found in the course of their development that a damping spring is susceptible to ageing over a long period of time, for example as a result of its reduced elasticity, i.e. requiring more deformation than before to produce the same elastic force. Under the same acting force, the aging of the damping spring can cause the volume of the air spring to increase, which leads to the stiffness degradation of the air spring, and therefore the riding comfort of the automobile is reduced. For this reason, there has been no good solution in the past.
The inventors have also found during the development that the damping spring, after ageing, rolls beyond the working stroke, i.e. the damping spring is in contact with the piston above the upper limit point at the outer surface of said piston. Therefore, the compensation stroke is creatively set up in the application, and the slope of the compensation stroke is at least partially larger than that of the working stroke, so that the effective air pressure section diameter of the air spring is increased in the compensation stroke, the rigidity of the air spring is improved, the rigidity decline of the air spring caused by the aging of the damping spring is compensated, even the influence caused by the aging of the damping spring is completely counteracted, and the riding comfort of the automobile is improved.
The damping spring can be a rubber element, for example in the form of a rubber bellows. The rubber bellows is easily aged after a long time of use, and the air spring according to the present application is particularly suitable for a case where the damper spring is configured as a rubber bellows.
According to one embodiment of the application, the slope of the compensation stroke is greater than the slope of the working stroke at the upper limit point (i.e. the region of the working stroke close to the upper limit point). Further, the slope of the compensation stroke is greater than that of the working stroke, that is, the slope of any point in the compensation stroke is greater than that of any point in the working stroke. In this way, the stiffness degradation caused by the aging of the damping spring can be compensated particularly effectively.
In one embodiment of the application, the slope of the compensation stroke is 1-30%, for example 1%, 5%, 10%, 15%, 20%, 25% and 30% greater than the slope of the working stroke at the upper limit point. Further, the slope of the compensation stroke is 2-3% greater than the slope of the working stroke at the upper limit point, e.g., 2%, 2.5%, and 3% greater.
The present application also includes a shock absorber with an air spring according to one or more of the embodiments described above, which therefore has technical features and technical effects corresponding to the above description, and therefore will not be described herein again.
According to one embodiment of the present application, the shock absorber further comprises a shock absorber cylinder, the air spring being disposed around the shock absorber cylinder. During operation of the shock absorber, the damping spring, the piston and the shock absorber cylinder form an enclosed air chamber.
Further, the shock absorber further includes a piston rod inserted into the shock absorber cylinder, and the piston rod and the shock absorber cylinder are relatively movable. The upper end of the piston rod is also provided with a buffer block, and the buffer block interacts with an anti-collision cover sleeved on the shock absorber cylinder, so that the impact generated between the buffer block and the anti-collision cover is relieved. Through the mutual cooperation of the damping motion between the piston rod and the shock absorber cylinder, the air chamber formed by the shock absorbing spring, the piston and the shock absorber cylinder and the elasticity of the shock absorbing spring, the effects of buffering, damping and keeping the posture of the vehicle body stable are finally achieved.
The technical scope of the present application is not limited to the contents in the above description, and those skilled in the art can make various changes and modifications to the above embodiments without departing from the technical spirit of the present application, and these changes and modifications should fall within the protective scope of the present application.
Claims (10)
1. Air spring, characterized in that it comprises a piston (1) and a damping spring (2) which can be brought into contact with the piston in a working stroke at the outer surface of the piston, the working stroke being between a lower limit point (a) and an upper limit point (B), a compensation point (C) being further provided above the upper limit point of the outer surface of the piston, a compensation stroke being between the upper limit point and the compensation point, the slope of the compensation stroke being at least partially greater than the slope of the working stroke.
2. Air spring according to claim 1, characterized in that the length of the working stroke is determined by the adjustment height of the air spring.
3. Air spring according to claim 2, characterized in that the adjustment height of the air spring is determined by the overall vehicle height.
4. The air spring of claim 1, wherein the slope of said compensation stroke is greater than the slope of said working stroke at said upper limit point.
5. The air spring of claim 3 wherein the slope of said compensation stroke is greater than the slope of said working stroke.
6. Air spring according to claim 3, characterized in that the slope of the compensation travel is 1-30% greater than the slope of the working travel at the upper limit point.
7. Air spring according to claim 6, characterized in that the slope of the compensation travel is 2-3% greater than the slope of the working travel at the upper limit point.
8. The air spring of claim 1, wherein the shock absorbing spring is a rubber bladder.
9. Shock absorber, characterized in that it comprises an air spring according to any one of claims 1 to 8.
10. The shock absorber according to claim 9, further comprising a shock absorber cylinder, said air spring being disposed about said shock absorber cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220965291.8U CN217761842U (en) | 2022-04-25 | 2022-04-25 | Air spring and shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220965291.8U CN217761842U (en) | 2022-04-25 | 2022-04-25 | Air spring and shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217761842U true CN217761842U (en) | 2022-11-08 |
Family
ID=83884309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220965291.8U Active CN217761842U (en) | 2022-04-25 | 2022-04-25 | Air spring and shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217761842U (en) |
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2022
- 2022-04-25 CN CN202220965291.8U patent/CN217761842U/en active Active
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