CN114738421B - Air spring and damper - Google Patents
Air spring and damper Download PDFInfo
- Publication number
- CN114738421B CN114738421B CN202210438334.1A CN202210438334A CN114738421B CN 114738421 B CN114738421 B CN 114738421B CN 202210438334 A CN202210438334 A CN 202210438334A CN 114738421 B CN114738421 B CN 114738421B
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- CN
- China
- Prior art keywords
- air spring
- slope
- stroke
- piston
- limit point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
- F16F9/05—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type
- F16F9/057—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type characterised by the piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
- F16F2222/126—Fluid damping using gases
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
本申请公开了一种空气弹簧以及减震器。空气弹簧包括活塞和减震弹簧，所述减震弹簧能够在所述活塞的外表面处的工作行程中与所述活塞接触，所述工作行程处于下极限点与上极限点之间，在所述活塞的外表面的上极限点上方还设有补偿点，在上极限点与补偿点之间为补偿行程，所述补偿行程的斜率至少部分地大于所述工作行程的斜率。根据本发明的空气弹簧能够提高汽车的乘坐舒适性。
The present application discloses an air spring and a shock absorber. The air spring comprises a piston and a shock absorbing spring, wherein the shock absorbing spring can contact the piston in a working stroke at the outer surface of the piston, wherein the working stroke is between a lower limit point and an upper limit point, and a compensation point is further provided above the upper limit point of the outer surface of the piston, wherein the compensation stroke is between the upper limit point and the compensation point, and the slope of the compensation stroke is at least partially greater than the slope of the working stroke. The air spring according to the present invention can improve the ride comfort of a car.
Description
Technical Field
The present invention relates to the field of automobiles, and more particularly, to an air spring and a shock absorber with such an air spring.
Background
Automobiles become a part of life of people gradually, people hope that the automobiles have good riding comfort as a riding-assisting tool so as to slow down jolting of the automobiles on uneven road surfaces, meanwhile, the automobiles also hope that the automobiles have good steering stability, the automobiles are prevented from tilting and shaking when starting, accelerating or decelerating and braking and bending at a high speed, and the advantages and disadvantages of an automobile suspension system play an important role in guaranteeing riding comfort and steering stability. An automotive suspension system is an elastic structure connecting a wheel and a vehicle body, and one of its main components is a shock absorber.
In the process of ensuring riding comfort and steering stability of an automobile suspension system, the rigidity and strength of the shock absorber play a great role. Existing shock absorbers use air springs to cushion, dampen and maintain a smooth body attitude. The air spring is disposed between the chassis and the body of the vehicle. The air spring comprises a piston and a damping spring, and the damping spring is easy to age after long-time use.
Therefore, it is necessary to make extensive studies for improving the existing problems or disadvantages including the above cases.
Disclosure of Invention
The invention provides an air spring, which can improve riding comfort of an automobile.
According to one aspect of the invention, an air spring is proposed, comprising a piston and a damping spring, which is able to be in contact with the piston during a working stroke at the outer surface of the piston, which working stroke is between a lower limit point and an upper limit point, and a compensation point is provided above the upper limit point of the outer surface of the piston, between which is a compensation stroke, the slope of which is at least partially greater than the slope of the working stroke.
According to an aspect of the present invention, the length of the working stroke is determined by the height of the air spring.
According to the air spring provided by one aspect of the invention, the adjusting height of the air spring is determined by the height of the whole vehicle.
According to an aspect of the present invention, the slope of the compensation stroke is greater than the slope of the working stroke at the upper limit point.
According to an aspect of the present invention, the slope of the compensation stroke is greater than the slope of the working stroke.
According to an aspect of the invention, the slope of the compensation stroke is 1-30% greater than the slope of the working stroke at the upper limit point.
According to an aspect of the invention, the slope of the compensation stroke is 2-3% greater than the slope of the working stroke at the upper limit point.
According to the air spring provided by one aspect of the invention, the damping spring is a rubber leather bag.
The invention further relates to a shock absorber with such an air spring. Since the damper is provided with the air spring according to the present invention, it is possible to have the advantages as described above.
According to a shock absorber proposed in one aspect of the present invention, the shock absorber further comprises a shock absorber tube, and the air spring is disposed around the shock absorber tube.
The invention has the beneficial effects that the slope of the compensation stroke is set to be at least partially larger than that of the working stroke, so that the stiffness decline of the air spring caused by long-time use of the damping spring can be at least partially compensated, and the riding comfort of the automobile is improved.
Drawings
The disclosure of the present invention is described with reference to the accompanying 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 invention. In the drawings, like reference numerals are used to refer to like parts unless otherwise specified. Wherein:
fig. 1 schematically shows an air spring according to an embodiment of the invention.
Detailed Description
It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.
An embodiment according to the invention is shown in connection with fig. 1, in which it can be seen that the air spring comprises a piston 1 and a damping spring 2, which is able to come into contact with the piston during a working stroke at the outer surface of the piston, which is between a lower limit point a and an upper limit point B. And a compensation point C is 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 larger than that of the working stroke. In the cross section as shown, a coordinate system is established in this plane, set up to the positive x-axis direction and to the left to the positive y-axis direction, in which the "slope" herein is understood.
During operation of the air spring, the air spring changes relative position. Specifically, the free end of the damper spring moves the free end of the piston up and down along the damper cylinder of the damper, during which the damper spring contacts the outer surface of the piston, and the contact point is in a change. This process can also be understood as the "rolling" of the damping spring at the outer surface of the piston. The collection of the contact points of the damping spring and the piston at the outer surface of the piston is the working stroke. The lower limit point is the lowest contact point of the damping spring with the piston at the outer surface of the piston, and the upper limit point is the uppermost contact point of the damping spring with the piston at the outer surface of the piston. That is, the range of contact of the damping spring with the piston is between the upper and lower limit points 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, so that the positions may be changed according to the positions. In other application scenarios, the relative positions of the "upper limit point" and the "lower limit point" may be interchanged, e.g. the "upper limit point" is below and the "lower limit point" is above. These and other directional terms should not be construed as limiting terms. Further, "above the upper limit point" may also be understood as a direction away from the lower limit point at the upper limit point.
Illustratively, the slope of the working stroke between the lower limit point a and the upper limit point B gradually increases from the lower limit point a to the upper limit point B, thereby at least partially compensating for the decrease in stiffness due to the shock absorbing spring being stretched or expanded.
According to one embodiment of the invention, the length of the working stroke is determined by the adjustment height of the air spring. In addition, the adjusting 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 vehicle, the height of the vehicle is designed at first at the beginning of development of the vehicle, and the adjusting height of the air spring is determined after the target value of the height of the vehicle is determined, so that 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 overall vehicle height is determined, the working stroke of the damper spring at the outer surface of the piston is unique and fixed. After this, design work, such as debug matching and bench verification, of the air spring is performed around the working stroke. Under the condition that the height requirement of the whole vehicle is unchanged, the working stroke is not changed.
The inventors have found during development that the shock absorbing springs are prone to ageing after prolonged use, for example as a decrease in elasticity, i.e. more deformation is required to produce the same elastic force than before. At the same force, the aging of the damper spring causes an increase in the volume of the air spring, which leads to a deterioration in the stiffness of the air spring and thus to a reduction in the ride comfort of the vehicle. There has been no good solution in the past for this.
The inventors have found during development that the damper springs roll beyond the range of the working stroke after ageing, i.e. the damper springs are in contact with the piston above the upper limit point at the outer surface of the piston. In the present invention, therefore, a compensation stroke is creatively established and the slope of the compensation stroke is set to be 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, and therefore, the stiffness of the air spring is improved, so that the stiffness decline of the air spring caused by the aging of the damping spring is compensated, and 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 may be a rubber part, for example constructed as a rubber bellows. The rubber bellows is easily aged after a long period of use, and the air spring according to the invention is particularly suitable for the case where the damper spring is constructed as a rubber bellows.
According to one embodiment of the invention, 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 the slope of the working stroke, i.e., the slope of any point in the compensation stroke is greater than the slope of any point in the working stroke. In this way, the deterioration of the stiffness due to the aging of the damper spring can be compensated particularly effectively.
In one embodiment of the invention, the slope of the compensation stroke is 1-30% greater than the slope of the working stroke at the upper limit point, such as 1%, 5%, 10%, 15%, 20%, 25% and 30% greater. Further, the slope of the compensation stroke is 2-3% greater than the slope of the working stroke at the upper limit point, such as 2%, 2.5% and 3% greater.
The invention also includes a shock absorber with any one or more of the embodiments described above, which therefore has technical features and technical effects corresponding to those described above, and will not be described in detail herein.
According to one embodiment of the invention, the shock absorber further comprises a shock absorber tube, the air spring being disposed around the shock absorber tube. During operation of the shock absorber, the damper spring, piston and shock absorber tube form a closed air chamber.
Further, the shock absorber further includes a piston rod which is inserted into the shock absorber tube, and which is movable relative to the shock absorber tube. The upper end of the piston rod is also provided with a buffer block which 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 between the damping motion between the piston rod and the damper cylinder, the air chamber formed by the damper spring, the piston and the damper cylinder and the elasticity of the damper 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 above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present application, and these changes and modifications should be included in the scope of the present application.
Claims (8)
1. An air spring, characterized in that the air spring comprises a piston (1) and a damping spring (2), which is capable of being brought into contact with the piston during a working stroke at the outer surface of the piston, which working stroke is 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, between which compensation stroke a slope of which is at least partly greater than the slope of the working stroke, such that the effective air pressure cross-sectional diameter of the air spring increases during the compensation stroke,
The length of the working stroke is determined by the adjustment height of the air spring,
The damping spring is a rubber leather bag.
2. The air spring of claim 1, wherein the height of adjustment of the air spring is determined by the height of the vehicle.
3. The air spring of claim 1 wherein the slope of the compensation stroke is greater than the slope of the working stroke at the upper limit point.
4. The air spring of claim 2 wherein the slope of the compensation stroke is greater than the slope of the working stroke.
5. The air spring of claim 2 wherein the slope of said compensation stroke is 1-30% greater than the slope of said working stroke at said upper limit point.
6. The air spring of claim 5 wherein the slope of said compensation stroke is 2-3% greater than the slope of said working stroke at said upper limit point.
7. A shock absorber characterized in that it comprises an air spring according to any one of claims 1 to 6.
8. The shock absorber of claim 7 further comprising a shock absorber tube, said air spring being disposed about said shock absorber tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210438334.1A CN114738421B (en) | 2022-04-25 | 2022-04-25 | Air spring and damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210438334.1A CN114738421B (en) | 2022-04-25 | 2022-04-25 | Air spring and damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114738421A CN114738421A (en) | 2022-07-12 |
| CN114738421B true CN114738421B (en) | 2025-07-08 |
Family
ID=82282821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210438334.1A Active CN114738421B (en) | 2022-04-25 | 2022-04-25 | Air spring and damper |
Country Status (1)
| Country | Link |
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| CN (1) | CN114738421B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263968A (en) * | 2022-08-15 | 2022-11-01 | 奇瑞汽车股份有限公司 | Air suspension structure and car |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016212826A1 (en) * | 2016-07-13 | 2018-01-18 | Continental Teves Ag & Co. Ohg | Air spring with self-reinforcing seal |
| CN217761842U (en) * | 2022-04-25 | 2022-11-08 | 蔚来汽车科技(安徽)有限公司 | Air spring and shock absorber |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010026002A1 (en) * | 2010-07-03 | 2011-03-10 | Daimler Ag | Air spring for supporting chassis frame of passenger car, has connector designed as elastic bearing with elastomer padding, where elastic bearing has radial cylindrical edge in region of elastomer padding |
| DE102011112130A1 (en) * | 2011-09-01 | 2013-03-07 | Audi Ag | Air spring device for a motor vehicle |
| DE102011084665A1 (en) * | 2011-10-18 | 2013-04-18 | Continental Teves Ag & Co. Ohg | Elastic air spring piston bearing |
| CN108412935A (en) * | 2018-04-03 | 2018-08-17 | 华南理工大学 | A kind of air spring that piston diameter is variable |
| CN110509736A (en) * | 2019-09-06 | 2019-11-29 | 安徽拓扑思汽车零部件有限公司 | A kind of big stroke air spring and air suspension |
-
2022
- 2022-04-25 CN CN202210438334.1A patent/CN114738421B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016212826A1 (en) * | 2016-07-13 | 2018-01-18 | Continental Teves Ag & Co. Ohg | Air spring with self-reinforcing seal |
| CN217761842U (en) * | 2022-04-25 | 2022-11-08 | 蔚来汽车科技(安徽)有限公司 | Air spring and shock absorber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114738421A (en) | 2022-07-12 |
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