Abnormal sound prevention air spring

Abstract

The utility model discloses an abnormal sound prevention air spring, which comprises a fixed seat, a plane bearing kit and a vulcanized rubber structure, the inner wall of a mounting hole of the fixed seat is subjected to rubber reduction treatment, the plane bearing kit is arranged at the mounting hole, and the vulcanized rubber structure is attached to the mounting hole, so that the plane bearing kit is in interference fit with the fixed seat. The plane bearing kit is configured to bear an axial load, and a moving ring of the plane bearing kit has a degree of freedom of relative rotation relative to the fixed seat. The plane bearing assembly has the advantages that the vulcanized rubber structure is attached between the fixing base and the plane bearing assembly, the flatness between the fixing base and the plane bearing assembly can be improved, and the plane bearing assembly is prevented from being damaged when bearing external force such as up-and-down jumping, left-and-right deflection and rotation. The plane bearing sleeve part generates axial or radial movement relative to the fixing seat, abnormal sound caused by the size matching problem and the like is reduced, good buffering and vibration filtering effects are achieved, and the service life of the plane bearing sleeve part and the service life of the fixing seat are effectively prolonged.

Description

Technical Field

[0001] This utility model relates to an anti-noise air spring, and more particularly to an anti-noise air spring. Background Technology

[0002] As an elastic element, air springs have been increasingly used in new energy vehicles in recent years. As new energy vehicles become heavier, and the abnormal noise of the piston and mating parts of the air spring is receiving increasing attention, the design of pistons to avoid abnormal noise will continue to receive attention.

[0003] See Figure 6 The existing technology connects the piston and the plane bearing vertically. The upper end of the plane bearing a is connected to the rotating cover body b, and the lower end is connected to the piston c. Since both the plane bearing a and the piston c are plastic parts, the flatness of the upper and lower connection surfaces is poor. During the movement of the whole vehicle, there will be vertical jumping, left and right swaying and rotation, which can easily lead to abnormal noise from the air spring. The wear on the rotating cover body b, the plane bearing a and the piston c is relatively serious. In addition, the transmission of air spring force is too rigid, which has a certain impact on comfort.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to solve the problem of abnormal noise from air springs.

[0006] This utility model solves the above-mentioned technical problems through the following technical means:

[0007] This utility model claims protection for an anti-noise air spring, including a fixed seat, a flat bearing assembly, and a vulcanized rubber structure. The inner wall of the mounting hole of the fixed seat is treated with rubber reduction. The flat bearing assembly is installed at the mounting hole, and the vulcanized rubber structure is attached at the mounting hole, so that the flat bearing assembly and the fixed seat are interference fit. The flat bearing assembly is configured to bear axial load, and the moving ring of the flat bearing assembly has a degree of freedom of relative rotation with respect to the fixed seat.

[0008] Preferably, the mounting hole opening is treated with a rubber reduction process to form a stepped hole, and a rubber ring is fitted inside the mounting hole. One end of the rubber ring abuts against the shoulder of the stepped hole, and the other end of the rubber ring is provided with a first flange, which abuts against the surface of the fixing seat.

[0009] Preferably, the surface of the rubber ring that fits into the planar bearing assembly has a plurality of interconnected channels and protruding bosses, with the bosses and channels being staggered from each other.

[0010] Preferably, the surface of the rubber ring that fits into the fixing seat is provided with a first groove.

[0011] Preferably, the first groove is a rectangular groove and / or a shaped groove and / or a shaped groove and / or a shaped groove.

[0012] Preferably, one end of the rubber ring near the shoulder of the stepped hole forms a flange outward, and the flange and the second groove formed on the inner wall of the stepped hole form an insertion fit.

[0013] Preferably, the rubber ring undergoes vulcanization treatment to form a vulcanized rubber structure.

[0014] Preferably, the planar bearing assembly includes a rotating cover, a pressure cover, a planar bearing body, and a support base. The rotating cover is coaxially inserted into the support base, and the planar bearing body is disposed at the horizontal mating surface between the rotating cover and the support base. The moving ring of the planar bearing body is connected to the rotating cover, and the stationary ring of the moving ring of the planar bearing body is connected to the support base. One end of the pressure cover is sleeved on the end face of the support base away from the rotating cover, and the other end of the pressure cover is engaged with a groove on the inner wall of the rotating cover.

[0015] Preferably, both the support base and the rotating cover are cylindrical structures. A third groove is recessed along the circumference on the upper surface of the support base. A planar bearing body is coaxially arranged in the third groove. The upper surface of the support base and the adjacent surface of the rotating cover together form a horizontal mating surface.

[0016] Preferably, a fourth groove is coaxially recessed on the upper surface of the support seat located on the outer ring of the third groove, and the fourth groove and the protrusion on the protruding surface of the rotating cover form an interlocking fit.

[0017] The advantages of this utility model are:

[0018] 1. By attaching a vulcanized rubber structure between the fixed seat and the flat bearing assembly, the flatness between the fixed seat and the flat bearing assembly can be improved. This prevents the flat bearing assembly from axially or radially moving relative to the fixed seat when subjected to external forces, such as vertical runout, lateral sway, and rotation. It also reduces abnormal noise caused by dimensional mismatch issues, providing excellent buffering and vibration filtering effects. This effectively improves the service life of the flat bearing assembly and the fixed seat. In practical applications, the fixed seat can be the piston seat, lower swing seat, and mounting seat in the air spring that needs to match the flat bearing assembly. The shape and size of the vulcanized rubber structure can also be adapted to the size of the mounting hole.

[0019] 2. The rubber ring is located inside the mounting hole and mainly acts on the vertical mating surface of the fixed seat and the plane bearing assembly. In conjunction with the first flange, which mainly acts on the horizontal mating surface of the fixed seat and the plane bearing assembly, the rubber ring and the first flange combine to achieve all-round buffering, vibration filtering and noise elimination effects on the mating surface of the fixed seat and the plane bearing assembly.

[0020] Third, the channel is mainly designed to guide the air trapped in the vulcanization of the vulcanized rubber structure, and then release it through the gap formed by the boss and the flat bearing assembly.

[0021] Fourth, by setting the first groove, it is easier to attach the fixing seat to the vulcanized rubber structure. The shape of the first groove can be determined in combination with the shape and size of the fixing seat and the difficulty of the production process.

[0022] 5. By interlocking the flange with the second groove, the rubber ring can be positioned to limit the movement of the rubber ring during installation, thus preventing the rubber ring from shifting due to compression during the installation of the flat bearing assembly.

[0023] 6. After the rubber ring is vulcanized, it can completely adhere to the gap between the fixed seat and the plane bearing assembly, thereby improving the flatness between them, avoiding axial or radial movement when the fixed seat and the plane bearing assembly are mated, reducing wear of the plane bearing assembly on the fixed seat, buffering the impact of external forces on the fixed seat, and thus improving the service life of the components.

[0024] 7. Position the planar bearing body by setting a third groove to ensure the coaxiality of the planar bearing body and the support seat.

[0025] 8. The coaxiality of the rotating cover relative to the support base is ensured by the insertion and engagement of the fourth groove and the protrusion. Attached Figure Description

[0026] Figure 1 This is an exploded view of the fixed base, the planar bearing kit, and the vulcanized rubber structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the rubber ring of this utility model;

[0028] Figure 3 This is a top view of the three-dimensional structure of the rubber ring of this utility model;

[0029] Figure 4 This is a bottom view of the three-dimensional structure of the rubber ring of this utility model;

[0030] Figure 5 This is a structural schematic diagram of the planar bearing kit of this utility model;

[0031] Figure 6 This is for Figure 5 A magnified view of a portion of the image;

[0032] Figure 7 This is a schematic diagram of the connection between the planar bearing, piston, and rotating cover body in the prior art.

[0033] a. Surface bearing; c. Piston; b. Rotary cover body;

[0034] 1. Fixing base; 1a. Stepped hole; 10a. Second groove;

[0035] 2. Surface bearing assembly; 20. Rotating cover; 201. Protrusion; 21. Pressure cap; 22. Surface bearing body; 23. Support seat; 230. Third groove; 231. Fourth groove;

[0036] 3a, rubber ring; 30a, flange; 3b, first flange; 30, channel; 31, boss; 32, first groove. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] See Figures 1 to 4 This utility model claims protection for an anti-noise air spring, including a fixed base 1, a flat bearing assembly 2, and a vulcanized rubber structure. The inner wall of the mounting hole of the fixed base 1 is treated with rubber reduction, and the opening of the mounting hole is treated with rubber reduction to form a stepped hole 1a. A rubber ring 3a is fitted inside the mounting hole. One end of the rubber ring 3a abuts against the shoulder of the stepped hole 1a, and the other end of the rubber ring 3a is provided with a first flange 3b. The first flange 3b abuts against the surface of the fixed base 1. The rubber ring 3a is located inside the mounting hole and mainly acts on the vertical mating surface of the fixed base 1 and the flat bearing assembly 2. In conjunction with the first flange 3b, which mainly acts on the horizontal mating surface of the fixed base 1 and the flat bearing assembly 2, the combination of the rubber ring 3a and the first flange 3b achieves all-round buffering, vibration filtering, and noise elimination effects on the mating surface of the fixed base 1 and the flat bearing assembly 2. One end of the rubber ring 3a near the shoulder of the stepped hole 1a forms a flange 30a. The flange 30a and the second groove 10a formed on the inner wall of the stepped hole 1a form an insertion fit. By inserting the flange 30a and the second groove 10a into each other, the rubber ring 3a can be limited when it is installed with the fixed seat 1, so as to avoid the problem of the rubber ring 3a shifting after being squeezed when the flat bearing kit 2 is installed.

[0039] See Figures 1 to 7The planar bearing assembly 2 is installed at the mounting hole. The surface of the rubber ring 3a, which is in contact with the planar bearing assembly 2, has several interconnected channels 30 and protruding bosses 31. The bosses 31 and channels 30 are staggered. The channels 30 are mainly for guiding air trapped during the vulcanization of the vulcanized rubber structure, allowing it to escape through the gap formed between the bosses 31 and the planar bearing assembly 2. A first groove 32 is provided on the surface of the rubber ring 3a that is in contact with the fixing seat 1. The first groove 32 is a rectangular groove and / or a V-shaped groove and / or a T-shaped groove and / or an L-shaped groove. The grooving method can be injection molding or extrusion molding depending on actual needs. Based on the processing technology, a rectangular groove is generally chosen. The first groove 32 facilitates the adhesion of the vulcanized rubber structure to the fixing seat 1. The shape of the first groove 32 can be determined by considering the shape and size of the fixing seat 1 and the difficulty of the manufacturing process. The rubber ring 3a is vulcanized to form a vulcanized rubber structure. The vulcanized rubber structure is attached to the mounting hole, so that the plane bearing assembly 2 and the fixed seat 1 are interference fit. After the rubber ring 3a is vulcanized, it can be completely attached to the gap between the fixed seat 1 and the plane bearing assembly 2, thereby improving the flatness between them and avoiding the problem of axial or radial movement when the fixed seat 1 and the plane bearing assembly 2 are mated. This reduces the wear of the plane bearing assembly 2 on the fixed seat 1 and buffers the impact of external forces on the fixed seat 1, thereby improving the service life of the components.

[0040] The planar bearing assembly 2 is configured to bear axial loads. The moving ring of the planar bearing assembly has a degree of freedom of relative rotation with respect to the fixed seat 1. The planar bearing assembly 2 includes a rotating cover 20, a pressure cover 21, a planar bearing body 22, and a support seat 23. The rotating cover 20 is coaxially inserted into the support seat 23, and the planar bearing body 22 is located at the horizontal mating surface of the rotating cover 20 and the support seat 23. Both the support seat 23 and the rotating cover 20 have a T-shaped cylindrical structure. A third groove 230 is recessed circumferentially on the upper surface of the support seat 23. The planar bearing body 22 is coaxially arranged in the third groove 230. The planar bearing body 22 is positioned by the third groove 230 to ensure the coaxiality of the planar bearing body 22 and the support seat 23. The bearing body 22 is positioned, and the upper surface of the support seat 23 and the adjacent surface of the rotating cover 20 together form a horizontal mating surface. The moving ring of the bearing body 22 is connected to the rotating cover 20, and the moving ring and stationary ring of the bearing body 22 are connected to the support seat 23. One end of the pressure cap 21 is sleeved on the end face of the support seat 23 away from the rotating cover 20. The other end of the pressure cap 21 is engaged with the groove on the inner wall of the rotating cover 20. The upper surface of the support seat 23 located on the outer ring of the third groove 230 is coaxially recessed with a fourth groove 231. The fourth groove 231 and the protrusion 201 protruding on the adjacent surface of the rotating cover 20 form an insertion engagement. Through the insertion engagement of the fourth groove 231 and the protrusion 201, the coaxiality of the rotation of the rotating cover 20 relative to the support seat 23 is ensured.

[0041] This utility model requires that by attaching a vulcanized rubber structure between the fixed seat 1 and the flat bearing assembly 2, the flatness between the fixed seat 1 and the flat bearing assembly 2 can be improved, preventing the flat bearing assembly 2 from axially or radially moving relative to the fixed seat 1 when subjected to external forces, such as vertical jump, left and right sway, and rotation. This reduces abnormal noise caused by dimensional fit issues, provides a good buffering and vibration filtering effect, and effectively improves the service life of the flat bearing assembly 2 and the fixed seat 1. In practical applications, the fixed seat 1 can be a piston seat, a lower swing seat, or a mounting seat. The shape and size of the vulcanized rubber structure can also be adapted to the size of the mounting hole.

[0042] This document provides a specific application scenario for an anti-noise air spring, primarily used to eliminate abnormal noise from the air spring. In fact, the fixed base 1 can be many components of the air spring, such as the piston seat, lower pivot seat, and mounting base. Taking the piston seat as an example, the rubber ring 3a is preferably made of EPDM material, i.e., ethylene propylene diene monomer (EPDM), a terpolymer of ethylene, propylene, and a non-conjugated diene. The specific steps include:

[0043] Step 1: Reduce the amount of adhesive used in the mounting holes of the existing piston seat. The size of the adhesive reduction is determined according to the size of the flat bearing assembly 2 and the rubber ring 3a, ensuring that the flat bearing assembly 2 and the piston seat are interference-fitted through the rubber ring 3a.

[0044] Step 2: Place the rubber ring 3a at the opening of the mounting hole so that the flange 30a and the second groove 10a are inserted and fitted together. Then, press the flat bearing assembly 2 into the mounting hole.

[0045] Step 3: Vulcanize the rubber ring 3a so that it can be evenly attached between the piston seat and the flat bearing assembly 2.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A noise reducing air spring, characterized by, The fixed seat (1) is provided with a mounting hole with a reduced glue treatment on the inner wall, and the planar bearing sleeve (2) is arranged in the mounting hole and attached with a vulcanized rubber structure, so that the planar bearing sleeve (2) is in interference fit with the fixed seat (1), and the planar bearing sleeve (2) is configured to bear axial load and has a relative rotation freedom with respect to the fixed seat (1).

2. The anti-rattle air spring of claim 1, wherein, The reduced glue treatment of the mounting hole forms a stepped hole (1a), and a rubber ring (3a) is sleeved in the mounting hole, one end of the rubber ring (3a) is in abutting fit with the shoulder of the stepped hole (1a), and the other end of the rubber ring (3a) is provided with a first flange (3b) in abutting fit with the surface of the fixed seat (1).

3. The anti-rattle air spring of claim 1, wherein The surface of the rubber ring (3a) in abutting fit with the planar bearing sleeve (2) is concavely provided with a plurality of channels (30) in communication with each other and convexly provided with a convex block (31), and the convex block (31) and the channels (30) are arranged in a staggered manner.

4. The anti-rattle air spring of claim 1, wherein, The surface of the rubber ring (3a) in abutting fit with the fixed seat (1) is provided with a first groove (32).

5. The anti-rattle air spring of claim 1, wherein The first groove (32) is a rectangular groove, a V-shaped groove, a T-shaped groove, and / or an L-shaped groove.

6. The anti-rattle air spring of claim 1, wherein, The one end of the rubber ring (3a) near the shoulder of the stepped hole (1a) is outwardly formed with a flange (30a) in plug fit with a second groove (10a) formed on the inner wall of the stepped hole (1a).

7. The anti-rattle air spring of claim 1, wherein The rubber ring (3a) is vulcanized to form a vulcanized rubber structure.

8. The anti-rattle air spring of claim 1, wherein, The planar bearing sleeve (2) comprises a rotating cover (20), a gland (21), a planar bearing body (22), and a support seat (23), the rotating cover (20) is coaxially inserted into the support seat (23), the planar bearing body (22) is arranged at the horizontal fit surface of the support seat (23) and the rotating cover (20), the dynamic ring of the planar bearing body (22) is connected with the rotating cover (20), the static ring of the planar bearing body (22) is connected with the support seat (23), the one end of the gland (21) is sleeved on the end face of the support seat (23) away from the rotating cover (20), and the other end of the gland (21) is in clamping fit with the clamping groove on the inner wall of the rotating cover (20).

9. The anti-rattle air spring of claim 1, wherein, The support seat (23) and the rotating cover (20) are both T-shaped cylindrical structures, the third groove (230) is concavely arranged on the upper surface of the support seat (23) in a circumferential direction, the planar bearing body (22) is coaxially arranged in the third groove (230), and the upper surface of the support seat (23) and the surface of the rotating cover (20) near the support seat (23) jointly form the horizontal fit surface.

10. The anti-rattle air spring of claim 1, wherein, The fourth groove (231) is coaxially concavely arranged on the upper surface of the support seat (23) outside the third groove (230), and the convex block (201) is convexly arranged on the surface of the rotating cover (20) near the support seat (23) to form plug fit with the fourth groove (231).

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