Air spring piston anti-twisting structure, air spring assembly with air spring piston anti-twisting structure and vehicle with air spring piston anti-twisting structure

Abstract

The utility model discloses an air spring piston anti-twist structure which comprises a shock absorber body arranged in an air spring in a penetrating mode, a piston base, a sealing ring check ring and an air spring piston, the piston base, the sealing ring check ring and the air spring piston are arranged on the outer side of the shock absorber body, the piston base is used for supporting the sealing ring check ring and the air spring piston, and the sealing ring check ring is arranged between the shock absorber body and the air spring piston. The sealing ring check ring and the shock absorber body are in interference fit, and the sealing ring check ring and the air spring piston are in interference fit. The utility model further discloses an air spring assembly with the air spring piston anti-twisting structure and a vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of air springs, and in particular relates to an air spring piston anti-twist structure and an air spring assembly and a vehicle having the same. Background Art

[0002] As an important component of the vehicle suspension system, the air spring shock absorber plays a vital role in the vehicle's driving process. It is responsible for absorbing road impact, reducing vehicle vibration, and ensuring the stability and comfort of the vehicle's driving. However, during the suspension movement, when the vehicle's posture changes due to factors such as wheel swing, reverse wheel hop or wheel lateral force, the air spring will be torsion due to the action of the suspension rod system. For air springs without a special torsional structure, their torsional stiffness is mainly determined by the bladder. When the bladder fails to absorb all the torsional torque due to its hardness, the piston on the shock absorber will rotate, which will not only cause abnormal noise between the shock absorber and the piston, but also cause the piston seal to torsion, seriously affecting the durability of the air spring assembly. Utility Model Content

[0003] In view of this, the first object of the present invention is to provide an air spring piston anti-twist structure that can solve the problem of insufficient durability of existing air spring assemblies.

[0004] A second object of the present utility model is to provide an air spring assembly and a vehicle having the air spring piston anti-twist structure.

[0005] In order to achieve the above-mentioned technical objectives, the first aspect of the present invention provides an air spring piston anti-twist structure, including a shock absorber body inserted into the air spring, and a piston base, a sealing ring and a hollow spring piston arranged on the outside of the shock absorber body, the piston base is used to support the sealing ring and the hollow spring piston, the sealing ring is arranged between the shock absorber body and the hollow spring piston, and the sealing ring and the shock absorber body, as well as the sealing ring and the hollow spring piston are interference fit.

[0006] In one embodiment, the sealing ring retainer has an anti-twist portion and an opening, the anti-twist portion is provided on the outer surface of the sealing ring retainer and extends along the axial direction of the sealing ring retainer, and the opening penetrates the side wall of the sealing ring retainer along the axial direction of the sealing ring retainer.

[0007] In one embodiment, the sealing ring retaining ring has an anti-twist portion, which is arranged at intervals along the circumference of the sealing ring retaining ring at the lower part of the sealing ring retaining ring, and at least a portion of the anti-twist portion protrudes from the outer surface of the main body of the sealing ring retaining ring, forming a groove between adjacent anti-twist portions.

[0008] In one embodiment, it further includes a piston sealing ring that is interference fit between the shock absorber body and the air spring piston, and the piston sealing ring is located above the sealing ring retaining ring.

[0009] In one embodiment, the device further comprises a shock absorber spring disk disposed outside the shock absorber body, wherein the shock absorber spring disk is located below the piston base.

[0010] In one embodiment, the shock absorber spring disc includes a connecting portion and a supporting portion, the connecting portion is fixedly connected to the outer surface of the shock absorber body, and the supporting portion extends radially outward from the top of the connecting portion.

[0011] In one embodiment, at least one of the piston base and the empty spring piston is provided with teeth or serrations.

[0012] In one embodiment, the piston base includes a base body and rubber layers vulcanized on upper and lower sides of the base body.

[0013] A second aspect of the present invention provides an air spring assembly, comprising an air spring and an air spring piston anti-twist structure as described in the above technical solution, wherein the air spring and the air spring piston anti-twist structure are coaxially arranged.

[0014] A third aspect of the present invention provides a vehicle, comprising the air spring assembly as described in the above technical solution.

[0015] By adopting the above technical solution, the utility model has the following beneficial effects:

[0016] The utility model improves the torsional rigidity of the anti-torsion structure by arranging a sealing ring and / or a piston sealing ring in an interference fit manner between the empty spring piston of the air spring assembly and the shock absorber body. The torsional rigidity of the anti-torsion structure is further improved by arranging teeth or sharp teeth on the piston base and / or the empty spring piston. This not only helps to solve the relative rotation problem between the empty spring piston of the air spring assembly and the shock absorber body due to changes in the posture of the entire vehicle, but also can improve the durability of the air spring assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1A schematic front view of an air spring piston anti-twist structure provided by an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 The schematic cross-sectional view of the air spring piston anti-twist structure in the AA direction is shown;

[0020] Figure 3 This is a structural diagram of the sealing ring and retaining ring in the first embodiment of the present utility model;

[0021] Figure 4 This is a structural diagram of the sealing ring and retaining ring in the second embodiment of the present utility model;

[0022] Figure 5 for Figure 1 The schematic diagram of the structure of the shock absorber spring disc in the anti-twist structure of the air spring piston is shown;

[0023] Figure 6 for Figure 1 The diagram shows the structure of the piston base in the air spring piston anti-twist structure.

[0024] Description of reference numerals:

[0025] 1. Shock absorber body; 2. Shock absorber spring plate; 3. Piston base; 4. 4a. Sealing ring and retaining ring; 5. Piston sealing ring; 6. Empty spring piston; 7. Dust cover;

[0026] 21. Connecting portion; 22. Supporting portion;

[0027] 31. Base body; 32. Rubber layer;

[0028] 41, 41a, anti-twist portion; 42, opening;

[0029] 42a. Notch. DETAILED DESCRIPTION

[0030] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the description of the present invention, all other embodiments derived by persons of ordinary skill in the art without inventive effort are also within the scope of protection of the present invention.

[0031] In the description of this utility model, unless otherwise specified or limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances.

[0032] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the utility model.

[0033] The terms "first," "second," "third," etc. are merely used to distinguish elements of similar nature and do not indicate or imply relative importance or a particular order.

[0034] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0035] Example 1

[0036] See also Figure 1 、 Figure 2The first embodiment of the present utility model provides an air spring piston anti-twist structure, which includes a shock absorber body 1, a piston base 3, a sealing ring and a retaining ring 4 and an empty spring piston 6, wherein one end of the shock absorber body 1 is passed through the air spring of the vehicle (not shown in the figure), and the other end is fixedly connected to the suspension rod system of the vehicle (not shown in the figure); the piston base 3 is installed at the lower part of the shock absorber body 1, and is used to provide support for the sealing ring and retaining ring 4 and the empty spring piston 6 arranged above the piston base 3; the sealing ring and retaining ring 4 is sleeved on the outer surface of the shock absorber body 1, and is located between the outer surface of the shock absorber body 1 and the inner surface of the empty spring piston 6, and one end of the sealing ring and retaining ring 4 is in contact with the top of the piston base 3; one end of the empty spring piston 6 is connected to the air bag of the air spring (not shown in the figure), and the other end is in contact with the top of the piston base 3. It should be noted that the air spring mentioned here is a key component in the vehicle's air suspension system. Its working principle is to fill a sealed container (such as an air bag) with compressed air, and then use the compressibility of the gas to achieve its elastic effect. In this way, when the vehicle encounters an uneven road surface or vibration during driving, the air spring can absorb and store this energy, and then release the energy through the compression and expansion of the gas, thereby playing a role in vibration reduction and buffering. The shock absorber body 1 mentioned here is actually a vibration damper, which is used to reduce the vibration and bumps of the vehicle body during driving and improve the stability and comfort of driving. Its upper part can be connected to the frame and the lower part can be connected to the wheel. In this way, when the wheel jumps up and down, it can effectively attenuate the vibration and protect other parts of the vehicle.

[0037] During the movement of the vehicle suspension, when the posture of the entire vehicle changes due to factors such as wheel swing, reverse wheel hop or wheel lateral force, the air spring will be torsion due to the action of the suspension rod system. When the torque causing the torsion cannot be fully absorbed by the air spring and its airbag, it will cause the air spring piston 6 and the shock absorber body 1 to rotate relative to each other, seriously affecting the durability of the air spring. In order to solve this problem, in the first embodiment, the sealing ring retaining ring 4 is interference fit between the shock absorber body 1 and the air spring piston 6, that is, the sealing ring retaining ring 4 and the shock absorber body 1 are interference fit, and the sealing ring retaining ring 4 and the air spring piston 6 are also interference fit, which is convenient for solving the problem of the air spring piston 6 rotating relative to the shock absorber body 1.

[0038] like Figure 3As shown, to ensure that the sealing ring retainer 4 is interference-fitted between the shock absorber body 1 and the air spring piston 6, in this first embodiment, the sealing ring retainer 4 is sleeve-shaped, and the outer diameter of the shock absorber body 1 is slightly larger than the inner diameter of the sealing ring retainer 4. Furthermore, the sealing ring retainer 4 is provided with an opening 42 axially extending through the sidewall of the sealing ring retainer 4. This allows the sealing ring retainer 4 to be fitted onto the shock absorber body 1 by expanding and contracting the opening 42, facilitating an interference fit.

[0039] Furthermore, an anti-twist portion 41 is formed on the outer surface of the sealing ring retainer 4, the inner surface of which is shaped to match the outer surface of the shock absorber body 1. The anti-twist portion 41 radially protrudes from the outer surface of the main body of the sealing ring retainer 4 and extends axially along the sealing ring retainer 4. Thus, during assembly of the sealing ring retainer 4 of the anti-twist structure of Example 1, the sealing ring retainer 4 is first interference-fitted onto the outer surface of the shock absorber body 1. Then, during the process of pressing the empty spring piston 6 from top to bottom onto the outer side of the shock absorber body 1, the provision of the anti-twist portion 41 further reduces the radial clearance between the empty spring piston 6 and the sealing ring retainer 4. This allows the sealing ring retainer 4 to further grip the shock absorber body 1 radially inward under the influence of the clamping force of the empty spring piston 6, further ensuring an interference fit between the sealing ring retainer 4 and the shock absorber body 1, while also achieving an interference fit between the sealing ring retainer 4 and the empty spring piston 6.

[0040] like Figure 2 As shown, to ensure the air tightness of the air spring's airbag during operation, the anti-twist structure also includes a piston seal 5 disposed between the shock absorber body 1 and the empty spring piston 6. The piston seal 5 is annular and is mounted on the outer surface of the shock absorber body 1 and is located above the seal retaining ring 4. It should be noted that to prevent the piston seal 5 from twisting due to the action of the suspension linkage, which may cause air bag leakage, the piston seal 5 is preferably interference-fitted between the shock absorber body 1 and the empty spring piston 6. That is, the piston seal 5 has an interference fit with the shock absorber body 1, and the piston seal 5 also has an interference fit with the empty spring piston 6. Specifically, the interference fit between the piston seal 5 and the shock absorber body 1 can be achieved by making the inner diameter of the piston seal 5 smaller than the outer diameter of the shock absorber body 1; the interference fit between the piston seal 5 and the empty spring piston 6 can be achieved by making the outer diameter of the piston seal 5 larger than the inner diameter of the empty spring piston 6. In this way, during the assembly of the anti-twist structure of Example 1, it is convenient to ensure that the piston seal ring 5 is interference fit between the shock absorber body 1 and the empty spring piston 6, so as to overcome the problem of air bag leakage caused by the torsion of the piston seal ring 5 due to the action of the suspension rod system.

[0041] like Figure 1 、 Figure 2 and Figure 5As shown, the anti-twist structure also includes a shock absorber spring disk 2 for providing support. The shock absorber spring disk 2 is in the shape of a tray, arranged on the outside of the shock absorber body 1, and fits under the piston base 3. Specifically, the shock absorber spring disk 2 includes a connecting portion 21 and a supporting portion 22, wherein the connecting portion 21 is annular, and a through hole is provided in the middle thereof, so that it can be easily fitted on the outer surface of the shock absorber body 1 through the through hole; the supporting portion 22 is in the shape of a plate, extending radially outward from the top of the connecting portion 21, so as to fit with the piston base 3 and provide support. Preferably, the supporting portion 22 is perpendicular to the connecting portion 21. It should be noted that in order to ensure that the shock absorber spring disk 2 can provide reliable support, the connecting portion 21 can be fixed to the outer surface of the shock absorber body 1 by welding.

[0042] In some embodiments, in order to improve the structural strength of the shock absorber spring disk 2, a plurality of reinforcing ribs may be formed between the support portion 22 and the connecting portion 21. These reinforcing ribs may be circumferentially arranged on the outer surface of the connecting portion 21 and connected to the bottom surface of the support portion 22.

[0043] When the empty spring piston 6 is pressed from top to bottom onto the outside of the shock absorber body 1, the bottom of the empty spring piston 6 contacts the top of the piston base 3, and the bottom of the piston base 3 fits against the top of the support portion 22 of the shock absorber spring disc 2. In the first embodiment, in order to further increase the resistance that the empty spring piston 6 needs to overcome in order to rotate relative to the shock absorber body 1, at least one of the piston base 3 and the empty spring piston 6 is provided with teeth or tines. Specifically, tines can be formed on the bottom of the empty spring piston 6. The tines can be serrated, hook-shaped, or convex. Correspondingly, grooves, card slots, or adapting holes are formed on the top of the piston base 3. When the tines are engaged with the corresponding grooves, card slots, or adapting holes, the empty spring piston 6 can be prevented from rotating relative to the piston base 3. In other embodiments, teeth can also be formed on both the bottom surface of the empty spring piston 6 and the top surface of the piston base 3. These teeth form a grid-like pattern, which can also prevent the empty spring piston 6 from rotating relative to the piston base 3. Of course, the piston base 3 may not be provided with grooves, slots, adapting holes or tooth patterns.

[0044] Furthermore, at least one of the shock absorber spring disk 2 and the piston base 3 may also be provided with teeth or sharp teeth. Specifically, sharp teeth may be formed on the top of the shock absorber spring disk 2, and the sharp teeth may be serrated, hook-shaped or column-shaped. Correspondingly, grooves, slots or adapter holes are formed on the bottom of the piston base 3 to increase the resistance that the piston base 3 needs to overcome when rotating relative to the shock absorber spring disk 2.

[0045] like Figure 6 As shown, the piston base 3 is annular and includes a base body 31 and a rubber layer 32 , wherein the rubber layer 32 is bonded to the upper and lower sides of the base body 31 through a vulcanization process to facilitate vibration isolation and buffering.

[0046] like Figure 2 As shown, in order to protect the empty spring piston 6, the anti-twist structure also includes a dust cover 7. The dust cover 7 has a wrinkled shape and is mounted on the outside of the empty spring piston 6, the piston base 3 and the shock absorber spring disk 2. It has an interference fit with the piston base 3 to prevent foreign objects from damaging the empty spring piston 6 and adjacent components.

[0047] Example 2

[0048] See also Figure 1 、 Figure 2 and Figure 4 The second embodiment of the present invention also provides an air spring piston anti-twist structure. Most of the features of this anti-twist structure are the same as the anti-twist structure of the aforementioned embodiment one. The difference is that the sealing ring retaining ring 4a of the anti-twist structure of this embodiment two is structurally different from the sealing ring retaining ring 4 of the anti-twist structure of embodiment one, which is described in detail below.

[0049] In embodiment 2, the sealing ring retainer 4a is sleeve-shaped, and a matching hole is formed in the middle part to match the outer surface of the shock absorber body 1. The sealing ring retainer 4a includes an anti-twist portion 41a, wherein the anti-twist portion 41a is formed at the lower part of the sealing ring retainer 4a, extending downward from the lower surface of the main body of the sealing ring retainer 4a, and at least a portion of the anti-twist portion 41a protrudes from the outer surface of the main body of the sealing ring retainer 4a.

[0050] In some embodiments, the number of anti-twist portions 41a can be multiple. In the second embodiment, the number of anti-twist portions 41a is ten. These ten anti-twist portions 41a are arranged at intervals along the circumference of the lower surface of the main body of the sealing ring 4a, and notches 42a are formed between adjacent anti-twist portions 41a. It should be noted that, compared to the sealing ring 4 in the first embodiment, the anti-twist portions 41a of the sealing ring 4a in the second embodiment are formed at the lower portion of the sealing ring 4a, and the notches 42a do not penetrate the sidewalls of the sealing ring 4a. In this way, in the process of assembling the sealing ring retaining ring 4a of the anti-twist structure of Example 2, the sealing ring retaining ring 4a is first interference-mounted on the outer surface of the shock absorber body 1, and then in the process of pressing the empty spring piston 6 from top to bottom on the outer side of the shock absorber body 1, due to the setting of the anti-twist portion 41a, the radial fitting clearance between the empty spring piston 6 and the lower part of the sealing ring retaining ring 4a can be further reduced, and the interference fit between the sealing ring retaining ring 4a and the empty spring piston 6 and the shock absorber body 1 can also be achieved, which is beneficial to solving the problem of relative rotation between the empty spring piston 6 and the shock absorber body 1 due to the action of the suspension rod system.

[0051] Example 3

[0052] The third embodiment of the present utility model discloses an air spring assembly, comprising an air spring and an air spring piston anti-torsion structure as described in any of the above embodiments. The air spring and the air spring piston anti-torsion structure are coaxially arranged, so that the air spring assembly has better durability.

[0053] Example 4

[0054] A fourth embodiment of the present invention discloses a vehicle, comprising the air spring assembly as described in the third embodiment above, so that the vehicle has better NVH (noise, vibration and harshness) performance.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] The utility model improves the torsional rigidity of the anti-twist structure by arranging a sealing ring 4 and / or a piston sealing ring 5 in an interference fit manner between the empty spring piston 6 of the air spring assembly and the shock absorber body 1. The torsional rigidity of the anti-twist structure is further improved by arranging teeth or sharp teeth on the piston base 3 and / or the empty spring piston 6. This not only helps to solve the relative rotation problem between the empty spring piston 6 of the air spring assembly and the shock absorber body 1 due to changes in the vehicle posture, but also improves the durability of the air spring assembly.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention are intended to be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An air spring piston anti-twist structure, characterized in that: The invention comprises a shock absorber body (1) which is inserted into an air spring, and a piston base (3), a sealing ring (4, 4a) and an air spring piston (6) which are arranged outside the shock absorber body (1); the piston base (3) is used to support the sealing ring (4, 4a) and the air spring piston (6); the sealing ring (4, 4a) is arranged between the shock absorber body (1) and the air spring piston (6); and the sealing ring (4, 4a) and the shock absorber body (1), as well as the sealing ring (4, 4a) and the air spring piston (6), are interference fit.

2. The air spring piston anti-twist structure according to claim 1, characterized in that: The sealing ring retaining ring (4, 4a) has an anti-twist portion (41, 41a) and an opening (42); the anti-twist portion (41, 41a) is provided on the outer surface of the sealing ring retaining ring (4, 4a) and extends along the axial direction of the sealing ring retaining ring (4, 4a); and the opening (42) penetrates the side wall of the sealing ring retaining ring (4, 4a) along the axial direction of the sealing ring retaining ring (4, 4a).

3. The air spring piston anti-twist structure according to claim 1, characterized in that: The sealing ring retaining ring (4, 4a) has an anti-twist portion (41, 41a), the anti-twist portion (41, 41a) is arranged at intervals along the circumference of the sealing ring retaining ring (4, 4a) at the lower part of the sealing ring retaining ring (4, 4a), and at least a portion of the anti-twist portion (41, 41a) protrudes from the outer surface of the main body of the sealing ring retaining ring (4, 4a), and a notch (42a) is formed between adjacent anti-twist portions (41, 41a).

4. The air spring piston anti-twist structure according to claim 1, characterized in that: It also includes a piston sealing ring (5) which is interference-fitted between the shock absorber body (1) and the air spring piston (6), and the piston sealing ring (5) is located above the sealing ring retaining ring (4, 4a).

5. The air spring piston anti-twist structure according to claim 1, characterized in that: It also includes a shock absorber spring disc (2) arranged on the outside of the shock absorber body (1), and the shock absorber spring disc (2) is located below the piston base (3).

6. The air spring piston anti-twist structure according to claim 5, characterized in that: The shock absorber spring disk (2) comprises a connecting portion (21) and a supporting portion (22), wherein the connecting portion (21) is fixedly connected to the outer surface of the shock absorber body (1), and the supporting portion (22) extends radially outward from the top of the connecting portion (21).

7. The air spring piston anti-twist structure according to claim 1, characterized in that: At least one of the piston base (3) and the empty spring piston (6) is provided with tooth patterns or sharp teeth.

8. The air spring piston anti-twist structure according to claim 1, wherein: The piston base (3) comprises a base body (31) and rubber layers (32) vulcanized on the upper and lower sides of the base body (31).

9. An air spring assembly, characterized in that: The invention comprises an air spring and an air spring piston anti-twist structure according to any one of claims 1 to 8, wherein the air spring and the air spring piston anti-twist structure are coaxially arranged.

10. A vehicle, characterized in that: Comprising the air spring assembly as claimed in claim 9.

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