Air spring applied to suspension and suspension

Abstract

The utility model discloses an air spring applied to a suspension and the suspension. The air spring comprises a piston, a leather bag, a guide pipe and a dust cover. The leather bag extends in the first direction and comprises a leather bag deformation area and a leather bag non-deformation area, the leather bag deformation area is fixedly connected with the bottom end, in the first direction, of the piston, and the leather bag non-deformation area is fixedly connected with the catheter; the piston is provided with a first boss; the guide pipe extends in the first direction and is provided with a second boss, and the guide pipe and the first boss are arranged in a spaced mode. The dust cover extends in the first direction and comprises a dust cover deformation area and a dust cover non-deformation area, the dust cover deformation area surrounds the piston and the guide pipe, the dust cover non-deformation area comprises a first part and a second part, the first part is provided with a first mounting groove, and the second part is provided with a second mounting groove; the first boss is in concave-convex fit with the first mounting groove, and the second boss is in concave-convex fit with the second mounting groove. According to the utility model, assembling steps can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of automobile air suspension devices, in particular to an air spring used for suspension and the suspension. Background Art

[0002] With the advancement of automotive technology and the increasing demand for improved vehicle performance, air springs are increasingly being used to replace traditional rigid springs. Air springs are flexible suspension components that utilize the elastic properties of compressed air to support loads, cushion vibrations, and adjust vehicle height. They are widely used in automotive air suspension systems and other applications. Air springs can include a dust cover, piston, and conduit. The top of the dust cover is fixed to the piston, while the bottom of the dust cover is fixed to the conduit. The dust cover also prevents foreign matter from entering the air spring.

[0003] Dust covers currently on the market usually use a fixing ring or a buckle to fix the bottom end of the dust cover to the conduit, resulting in problems such as complicated dust cover assembly steps. Utility Model Content

[0004] The purpose of the present invention is to solve the problem that the dust cover assembly steps are relatively complicated. The present invention provides a method for suspending an air spring and a suspension, which can effectively reduce the dust cover assembly steps.

[0005] In order to solve the above technical problems, an embodiment of the present utility model discloses an air spring for suspension, which includes a piston, a bladder, a conduit and a dust cover; the bladder extends along a first direction, the bladder includes a bladder deformation area and a bladder non-deformation area, the bladder deformation area is fixedly connected to the bottom end of the piston along the first direction, and the bladder non-deformation area is fixedly connected to the conduit; the piston is provided with a first boss; the conduit extends along the first direction, the conduit is provided with a second boss, the second boss is arranged on the middle circumferential surface of the conduit along the first direction, and the conduit is spaced apart from the first boss; the dust cover extends along the first direction, the dust cover includes a dust cover deformation area and a dust cover non-deformation area, the dust cover deformation area is arranged around the piston and the conduit, the dust cover non-deformation area includes a first part and a second part, the first part is provided with a first mounting groove, and the second part is provided with a second mounting groove; the first boss is in concave-convex fit with the first mounting groove, and the second boss is in concave-convex fit with the second mounting groove.

[0006] By adopting the above technical solution, by directly fixing the second mounting groove and the second boss, no additional parts are needed to fix the dust cover, which can effectively reduce the number of parts, reduce assembly steps, and improve production efficiency. In addition, when the conduit extends along the first direction, the rigid conduit has a second-direction supporting effect on the dust cover without affecting the up and down movement of the piston, preventing the dust cover from rubbing against the piston or bladder under extreme conditions, and at the same time reducing the shaking of the connecting end between the second mounting groove and the second boss, effectively improving the service life of the connecting end here, wherein the first direction is perpendicular to the second direction.

[0007] According to another specific embodiment of the present invention, the second mounting groove includes a plurality of second mounting grooves, and the plurality of second mounting grooves are arranged at intervals along the circumference of the second portion.

[0008] According to another specific embodiment of the present invention, the second mounting groove is provided with a first wall, a second wall and a third wall; the second boss is provided with a fourth wall, a fifth wall and a sixth wall; the first wall and the fourth wall, the second wall and the fifth wall abut against each other along the first direction, and the third wall and the sixth wall abut against each other along the second direction; the first direction is arranged perpendicular to the second direction.

[0009] By adopting the above technical solution, the second mounting groove and the second boss can be directly fixed without the need for additional parts to fix the dust cover, which can effectively reduce the number of parts, reduce assembly steps, and improve production efficiency.

[0010] According to another specific embodiment of the present invention, the second part is also provided with a breathing groove, and the breathing groove includes multiple breathing grooves, and the multiple breathing grooves are arranged at intervals along the circumference of the second part; the breathing groove is arranged between two adjacent second installation grooves, and the second installation groove is connected to the breathing groove.

[0011] By adopting the above technical solution, compared with directly setting through holes on the dust cover for exhaust, setting breathing grooves inside the dust cover can achieve the exhaust effect while effectively improving the structural strength of the dust cover and reducing the risk of damage.

[0012] According to another specific embodiment of the present utility model, the breathing groove is provided with a seventh wall, an eighth wall and a ninth wall; the fourth wall and the seventh wall, the fifth wall and the eighth wall are spaced apart along the first direction; the sixth wall and the ninth wall are spaced apart along the second direction; the fourth wall, the fifth wall, the sixth wall, the seventh wall, the eighth wall and the ninth wall form an exhaust channel; the first boss and the conduit form a compression chamber; the exhaust channel is connected to the compression chamber.

[0013] By adopting the above technical solution, the inner surface of the breathing groove and the outer surface of the second boss are spaced apart to form an exhaust channel, and the first boss, the piston body and the conduit form a compression chamber, which is connected to the exhaust channel. When the air spring is compressed, the air in the compression chamber is squeezed and can be discharged through the exhaust channel, preventing the dust cover from expanding in a compressed state due to the inability to discharge gas, which may cause it to rupture or come into contact with other parts to cause friction and cause danger.

[0014] According to another specific embodiment of the present invention, the first boss is an annular boss, and the first boss is provided at the upper end of the piston along the first direction.

[0015] According to another specific embodiment of the present invention, the second boss is an annular boss, and the second boss is arranged on the upper side of the bottom end of the conduit along the first direction.

[0016] The above technical solution can effectively shorten the length of the dust cover and save costs compared to the design of covering the entire air spring with the dust cover.

[0017] According to another specific embodiment of the present invention, the deformation area and the non-deformation area of ​​the dust cover are made of elastic material.

[0018] By adopting the above technical solution, since the dust cover is made of elastic material, the first mounting groove and the second mounting groove can be respectively sleeved on the outer surfaces of the first boss and the second boss by interference fit. Based on the deformation characteristics of the elastic material, the inner wall of the mounting groove elastically expands along the first direction and the second direction during the sleeve installation process, and forms a tight covering with the outer surface of the corresponding boss through the material's own restoring force after the sleeve installation is completed. Therefore, no additional parts are required to fix the dust cover, thereby effectively reducing the number of parts, reducing assembly steps, and improving production efficiency.

[0019] An embodiment of the present utility model further discloses a suspension, which includes at least the air spring in any one of the above embodiments, and the suspension is fixedly connected to the air spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A side view of an air spring provided in an embodiment of the present application is shown;

[0021] Figure 2 Shown Figure 1 A cross-sectional view of the air spring along the AA direction is shown;

[0022] Figure 3 A three-dimensional diagram of a dust cover provided in an embodiment of the present application is shown;

[0023] Figure 4 Shown Figure 2A partial enlarged view of the middle B area;

[0024] Figure 5 A cross-sectional view of a catheter provided in an embodiment of the present application is shown;

[0025] Figure 6 Shown Figure 2 A partial enlarged view of the middle C area. DETAILED DESCRIPTION

[0026] The following is an explanation of the implementation of the present invention by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide an in-depth understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0028] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0029] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0030] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0032] A dust cover in an air spring has the function of preventing foreign matter from entering the air spring. A good dust cover can effectively reduce the ingress of foreign matter into the air spring while saving assembly steps. However, in some existing embodiments, the dust cover requires additional parts to install and secure, which complicates the assembly process.

[0033] To this end, the present application provides an air spring for suspension, wherein the air spring is fixed to the suspension, wherein the conduit is provided with a boss, and the lower end of the dust cover is fixed to the conduit boss, thereby reducing the assembly steps while ensuring that foreign matter is prevented from entering the air spring.

[0034] Specifically, refer to Figure 1 and Figure 2 The air spring 100 of the embodiment of the present application includes a piston 200, a bladder 300, a conduit 400, a dust cover 500 and a bottom cover 600. The bladder 300 extends along a first direction Z. The bladder 300 includes a bladder deformation area 310 and a bladder non-deformation area 320. The bladder deformation area 310 is fixedly connected to the bottom end of the piston 200 along the first direction Z. The bladder non-deformation area 320 is fixed to the conduit 400. Below the bladder non-deformation area 320, there is also a bladder compression area 330 and a bladder fixing area 340. The bladder fixing area 340 is fixed to the bottom cover 600. The bottom cover 600 is fixed by buckling with a first pressure ring 610, and the bottom cover 600 is spaced apart from the conduit 400, and the bottom cover 600 is used to be fixed to the suspension; the conduit 400 extends along the first direction Z, and the dust cover 500 extends along the first direction Z. The dust cover 500 includes a dust cover deformation area 510 and a dust cover non-deformation area 520. The dust cover deformation area 510 is arranged around the piston 200 and the conduit 400. The piston 200 is provided with a first boss 210. The conduit 400 is spaced apart from the first boss 210. The dust cover deformation area 510 and the dust cover non-deformation area 520 are made of elastic material.

[0035] In this embodiment, the dust cover 500 is made of thermoplastic vulcanized rubber. However, those skilled in the art will appreciate that in other embodiments, the dust cover 500 may also be made of other elastic materials, such as silicone rubber, thermoplastic polyurethane, etc., and this application does not limit this.

[0036] It should be noted that when the air spring 100 is compressed, the bladder compression area 330 elastically expands along the second direction X through the gap between the bottom cover 600 and the conduit 400, thereby realizing adaptive pressure adjustment during gas retention, which not only avoids the risk of bursting, but also converts gas energy into elastic potential energy through directional deformation, effectively realizing the shock absorption function of the air spring 100, wherein the first direction Z is arranged perpendicular to the second direction X.

[0037] Specifically, the bottom end of the piston 200 along the first direction Z is fixedly connected to the top end of the bladder 300 along the first direction Z. At the same time, the conduit 400 is sleeved on the outer surface of the bladder 300. When the air spring 100 is not compressed, the conduit 400 and the first boss 210 are spaced apart. At this time, in the absence of the dust cover 500, foreign matter can easily fall into the gap between the conduit 400 and the piston 200 due to the spacing and enter the outer surface of the bladder 300. When the air spring 100 is compressed downward along the first direction Z, the bladder deformation area 310 rolls downward along the first direction Z, causing the foreign matter to move downward with the bladder 300. When the air spring 100 rebounds upward along the first direction Z, the foreign matter may exist between the bladder 300 and the conduit 400, thereby damaging the bladder 300. Therefore, by adding a dust cover 500, foreign matter can be prevented from entering the air spring 100.

[0038] For example, the bottom end of the piston 200 along the first direction Z and the top end of the bladder 300 along the first direction Z are fixed by a second pressure ring 220. However, those skilled in the art will appreciate that in other embodiments, the piston 200 and the bladder 300 may be fixedly connected by other means, such as gluing, etc., and this application does not limit this.

[0039] Further, refer to Figure 1 and Figure 2 , the conduit 400 is provided with a second boss 410 .

[0040] In this embodiment, the second boss 410 is circumferentially disposed on the outer surface of the conduit 400 . The second boss 410 is an annular boss. The second boss 410 is disposed on the middle circumferential surface of the conduit 400 along the first direction Z.

[0041] It should be noted that, in this embodiment, the second boss 410 is integrally formed with the conduit 400. However, those skilled in the art will appreciate that, in other embodiments, the second boss 410 may also be fixed to the conduit 400 by welding, and this application does not limit this.

[0042] refer to Figures 1 to 3 The non-deformation area 520 of the dust cover includes a first part 521 and a second part 522. The first part 521 is provided with a first mounting groove 5211, and the second part 522 is provided with a second mounting groove 5221; the first boss 210 is matched with the first mounting groove 5211 in a concave-convex manner, and the second boss 410 is matched with the second mounting groove 5221 in a concave-convex manner.

[0043] Specifically, the dust cover 500 is fixed to the first boss 210 of the piston 200 through the first mounting groove 5211 , and the dust cover 500 is fixed to the second boss 410 of the conduit 400 through the second mounting groove 5221 .

[0044] It should be noted that, since the dust cover 500 is made of an elastic material, the first mounting groove 5211 and the second mounting groove 5221 can be respectively sleeved on the outer surfaces of the first boss 210 and the second boss 410 by means of an interference fit. Based on the deformation characteristics of the elastic material, the inner walls of the mounting grooves elastically expand along the first direction Z and the second direction X during the sleeve installation process, and after the sleeve installation is completed, the material's own restoring force forms a tight covering with the outer surface of the corresponding boss. However, those skilled in the art will appreciate that, in other embodiments, the first mounting groove 5211 and the second mounting groove 5221 can also be fixed to the first boss 210 and the second boss 410 respectively by other means, such as adhesive fixation, and this application does not impose any restrictions on this.

[0045] refer to Figure 3 The second mounting groove 5221 includes multiple, multiple second mounting grooves 5221 are arranged at intervals along the circumference of the second part 522, and the second part 522 is also provided with a breathing groove 5222, and the breathing groove 5222 includes multiple, multiple breathing grooves 5222 are arranged at intervals along the circumference of the second part 522, and the breathing groove 5222 is arranged between two adjacent second mounting grooves 5221, and the second mounting groove 5221 is connected to the breathing groove 5222.

[0046] Specifically, the fixing method of the second mounting groove 5221 and the second boss 410 is the same as the fixing method of the first mounting groove 5211 and the first boss 210 .

[0047] In this embodiment, there are multiple second mounting grooves 5221 and multiple breathing grooves 5222 respectively, and the multiple second mounting grooves 5221 and the multiple breathing grooves 5222 are arranged in sequence, that is, one second mounting groove 5221, one breathing groove 5222, one second mounting groove 5221, and one breathing groove 5222 are arranged and connected in sequence.

[0048] It should be noted that the number and size of the breathing grooves 5222 are determined based on the total cross-sectional area required for the required exhaust volume. For example, in this embodiment, the number of breathing grooves 5222 is 6. However, those skilled in the art will appreciate that in other embodiments, the number of breathing grooves 5222 can be other numbers, such as 1, 3, 8, etc., as long as the total cross-sectional area of ​​all breathing grooves 5222 meets the required exhaust volume. This application does not impose any restrictions on the number or shape of the breathing grooves 5222.

[0049] refer to Figure 4 and Figure 5 The second mounting groove 5221 is provided with a first wall 52211, a second wall 52212 and a third wall 52213; the second boss 410 is provided with a fourth wall 411, a fifth wall 412 and a sixth wall 413; the first wall 52211 and the fourth wall 411, the second wall 52212 and the fifth wall 412 abut along the first direction Z, and the third wall 52213 and the sixth wall 413 abut along the second direction X.

[0050] Specifically, the second mounting grooves 5221 are matched with the second boss 410 in a concave-convex manner, and the bottom end of the dust cover 500 is fixed to the second boss 410 through the multiple second mounting grooves 5221 to prevent the dust cover 500 from falling off.

[0051] In some possible embodiments, the conduit 400 is provided with a plurality of second bosses 410 (not shown in the figures). The plurality of second bosses 410 are arranged at intervals along the circumference of the conduit 400 on the outer surface of the conduit 400 opposite to the plurality of second mounting grooves 5221 .

[0052] refer to Figure 2 、 Figure 5 and Figure 6 The breathing groove 5222 is provided with a seventh wall 52221, an eighth wall 52222 and a ninth wall 52223; the fourth wall 411 and the seventh wall 52221, the fifth wall 412 and the eighth wall 52222 are spaced apart along the first direction Z; the sixth wall 413 and the ninth wall 52223 are spaced apart along the second direction X, the fourth wall 411, the fifth wall 412, the sixth wall 413, the seventh wall 52221, the eighth wall 52222 and the ninth wall 52223 form an exhaust channel 700, the first boss 210 and the conduit 400 form a compression chamber 800, and the exhaust channel 700 is connected to the compression chamber 800.

[0053] Specifically, the inner surface of the breathing groove 5222 and the outer surface of the second convex portion are spaced apart to form an exhaust channel 700, and the first boss 210, the piston 200 body and the conduit 400 form a compression chamber 800. The compression chamber 800 is connected to the exhaust channel 700. When the air spring 100 is compressed, the air in the compression chamber 800 is squeezed and can be discharged through the exhaust channel 700, preventing the dust cover 500 from expanding in a compressed state due to the inability to discharge gas, which may easily cause rupture or contact with other parts to cause friction and cause danger.

[0054] In this embodiment, the first wall 52211 and the second wall 52212 are respectively perpendicular to the third wall 52213, and the first wall 52211 is parallel to the second wall 52212. The fourth wall 411 and the fifth wall 412 are respectively perpendicular to the sixth wall 413, and the fourth wall 411 is parallel to the fifth wall 412. The seventh wall 52221 and the eighth wall 52222 are respectively perpendicular to the ninth wall 52223, and the seventh wall 52221 is parallel to the eighth wall 52222. However, those skilled in the art will appreciate that in other embodiments, the first wall 52211, the second wall 52212 and the third wall 52213, the fourth wall 411, the fifth wall 412 and the sixth wall 413, and the seventh wall 52221, the eighth wall 52222 and the ninth wall 52223 may have other geometric relative relationships, and this application is not limited thereto.

[0055] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An air spring used for suspension, characterized in that: include: Piston, bladder, catheter and dust cover; The bladder extends along a first direction, and includes a bladder deformation area and a bladder non-deformation area. The bladder deformation area is fixedly connected to the bottom end of the piston along the first direction, and the bladder non-deformation area is fixedly connected to the catheter. The piston is provided with a first boss; The conduit extends along the first direction, and is provided with a second boss, which is arranged on a circumferential surface of a middle section of the conduit along the first direction, and the conduit is spaced apart from the first boss; The dust cover extends along the first direction, the dust cover includes a dust cover deformation area and a dust cover non-deformation area, the dust cover deformation area is arranged around the piston and the guide tube, the dust cover non-deformation area includes a first portion and a second portion, the first portion is provided with a first mounting groove, and the second portion is provided with a second mounting groove; The first boss is matched with the first mounting groove in a concave-convex manner, and the second boss is matched with the second mounting groove in a concave-convex manner.

2. The air spring according to claim 1, wherein: The second mounting grooves include a plurality of second mounting grooves, and the plurality of second mounting grooves are spaced apart along the circumference of the second portion.

3. The air spring according to claim 2, wherein: The second mounting groove is provided with a first wall, a second wall and a third wall; The second boss is provided with a fourth wall, a fifth wall and a sixth wall; The first wall and the fourth wall, the second wall and the fifth wall abut against each other along the first direction, and the third wall and the sixth wall abut against each other along the second direction; The first direction is perpendicular to the second direction.

4. The air spring according to claim 3, wherein: The second portion is further provided with a breathing groove, wherein the breathing groove comprises a plurality of breathing grooves, and the plurality of breathing grooves are arranged at intervals along the circumference of the second portion; The breathing groove is arranged between two adjacent second installation grooves, and the second installation groove is communicated with the breathing groove.

5. The air spring according to claim 4, wherein: The breathing groove is provided with a seventh wall, an eighth wall and a ninth wall; The fourth wall and the seventh wall, and the fifth wall and the eighth wall are spaced apart along the first direction; The sixth wall and the ninth wall are spaced apart from each other along the second direction; The fourth wall, the fifth wall, the sixth wall, the seventh wall, the eighth wall, and the ninth wall form an exhaust passage; The first boss and the conduit form a compression chamber; The exhaust passage is communicated with the compression chamber.

6. The air spring according to claim 1, wherein: The first boss is an annular boss, and the first boss is arranged at the upper end of the piston along the first direction.

7. The air spring according to claim 1, wherein: The second boss is an annular boss, and the second boss is arranged on the upper side of the bottom end of the conduit along the first direction.

8. The air spring according to claim 1, wherein: The deformation area of ​​the dust cover and the non-deformation area of ​​the dust cover are made of elastic material.

9. A suspension, characterized in that: include: The air spring according to any one of claims 1 to 8; The suspension is fixedly connected to the air spring.

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