Noise reduction combined pad and multi-cavity air spring

Abstract

The utility model discloses a noise reduction combined pad which is characterized in that the noise reduction combined pad comprises a supporting frame and a rubber pad, the bottom of the supporting frame is connected with the top of the rubber pad in a fastening mode, and the connecting side of the supporting frame and the connecting side of the rubber pad form a cross connecting structure; the noise reduction combined pad is of an annular structure, the area of the inner wall of the rubber pad accounts for more than half of the area of the inner wall of the noise reduction combined pad, and the area of the outer wall of the rubber pad accounts for more than half of the area of the outer wall of the noise reduction combined pad. The utility model further discloses the multi-cavity air spring. The electromagnetic valve has the advantages that noise of the electromagnetic valve can be effectively isolated, and the purpose of reducing the NVH of the air spring is achieved.

Description

Technical Field

[0001] The utility model relates to a multi-chamber air spring, and particularly to a solenoid valve of a multi-chamber air spring. Background Art

[0002] With the increasing requirements for vehicle comfort, more and more vehicles are beginning to be equipped with multi-chamber air springs. The solenoid valve switch in the multi-chamber air spring will generate corresponding NVH noise (NVH is the English abbreviation of Noise, Vibration, and Harshness). The NVH problem is not only one of the common problems during vehicle use, but also directly affects the comfort and reliability of the vehicle. According to statistics, about 1 / 3 of vehicle failures are related to the vehicle NVH problem. Therefore, NVH is a comprehensive indicator to measure the manufacturing quality of automobiles, which not only involves problems during the production process of automobiles, but also includes the impact on vehicle ride comfort. At present, most vehicles equipped with air springs are new energy vehicles, and the requirements for NVH are particularly strict.

[0003] For example, in CN116658556 A, a multi-chamber air spring, a first compression ring Y1 and a first rubber washer X1 are sequentially sleeved and installed on the first limit installation part from top to bottom, and a first snap ring K1 is press-fitted and installed on the first compression ring Y1. In this prior art, only a single first rubber washer X1 is provided, and the existing single washer cannot well solve the NVH noise problem.

[0004] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the present utility model, and should not be regarded as an admission or any form of suggestion that this information has constituted the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is: how to solve the problem that the current single washer cannot meet the NVH noise problem.

[0006] The present utility model realizes the solution of the above technical problem by the following technical means:

[0007] A noise reduction combination gasket, comprising a support frame and a rubber gasket. The bottom of the support frame is fixedly connected to the top of the rubber gasket, and a cross-connection structure is formed on the connection side between the support frame and the rubber gasket; the noise reduction combination gasket is in a ring structure, the inner wall area of the rubber gasket accounts for more than half of the inner wall area of the noise reduction combination gasket, and the outer wall area of the rubber gasket accounts for more than half of the outer wall area of the noise reduction combination gasket.

[0008] The utility model provides a combined washer. The support frame serves as the skeleton of the combined washer, and the rubber washer is mainly used for buffering. After the noise reduction combined washer is assembled, the solenoid valve compresses the noise reduction combined washer under air pressure. The rubber washer extends inwards and outwards in the thickness and diameter directions. The outer wall of the rubber washer contacts the shell, and the inner wall of the rubber washer contacts the solenoid valve. The sound generated when the solenoid valve is switched is buffered by the rubber washer. At the same time, in the radial direction of the rubber washer, the noise of the solenoid valve can be effectively isolated, achieving the purpose of reducing the air spring NVH.

[0009] Preferably, one end of the support frame extends outwards to form at least one first convex connecting surface, and one end of the rubber washer is recessed inwards to form at least one first concave connecting surface. The first convex connecting surface is tightly connected to the first concave connecting surface.

[0010] Preferably, the middle of one end of the support frame extends outwards to form a first convex connecting surface, and the middle of one end of the rubber washer is recessed inwards to form a first concave connecting surface. The first convex connecting surface is tightly connected to the first concave connecting surface.

[0011] Preferably, the first convex connecting surface and the first concave connecting surface are connected by interference fit.

[0012] Preferably, the support frame and the rubber washer are of an integral structure.

[0013] In the utility model, the support frame is wrapped by the rubber washer, and the part located on the external contact surface is mainly the rubber washer, which can take into account the requirements of rigidity and flexibility.

[0014] Preferably, the inner wall of the rubber washer is the contact surface of the solenoid valve, and the outer wall of the rubber washer is the contact surface of the shell.

[0015] Preferably, the inner side of the end of the rubber washer away from the support frame has a chamfer.

[0016] The utility model also discloses a multi-chamber air spring, which includes a shell, a solenoid valve, and the above-mentioned noise reduction combined washer. An inner concave installation groove is formed between the outer side of the top end of the solenoid valve and the inner wall of the shell, and the noise reduction combined washer is limited in the inner concave installation groove by a pressing ring.

[0017] Preferably, the outer side of the top end of the solenoid valve includes a step. The depth of the step is 1-2 mm less than the height of the entire noise reduction combined washer, and the depth of the step is 1-2 mm greater than the height of the inner wall of the rubber washer.

[0018] When the noise reduction combined pad is in a state where the air spring is not inflated, there is a small gap between the noise reduction combined pad, the solenoid valve, and the housing. After the air spring is inflated, the solenoid valve exerts a compressive force on the noise reduction combined pad. When the noise reduction combined pad is axially compressed by the solenoid valve, it will also be compressed radially, contacting the solenoid valve at the inner diameter and the housing at the outer diameter. Compared with a simple plastic part, it can effectively isolate the noise of the solenoid valve, achieving the effect of low NVH for the entire vehicle.

[0019] The advantages of the present utility model are as follows:

[0020] The present utility model provides a combined washer. The support frame serves as the skeleton of the combined pad, and the rubber pad is mainly used for buffering. After the noise reduction combined pad is assembled, the solenoid valve is compressed by air pressure to compress the noise reduction combined pad. The rubber pad extends inwards and outwards in the thickness and diameter directions. The outer wall of the rubber pad contacts the housing, and the inner wall of the rubber pad contacts the solenoid valve. The sound generated when the solenoid valve is switched is buffered by the rubber pad. At the same time, in the radial direction of the rubber pad, it can effectively isolate the noise of the solenoid valve, achieving the purpose of reducing the NVH of the air spring. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the noise reduction combined pad in Embodiment 1 of the present utility model;

[0022] Figure 2 is an exploded view of the noise reduction combined pad in Embodiment 1 of the present utility model;

[0023] Figure 3 is a schematic structural diagram of the noise reduction combined pad in Embodiment 2 of the present utility model;

[0024] Figure 4 is an exploded view of the noise reduction combined pad in Embodiment 2 of the present utility model;

[0025] Figure 5 is a cross-sectional view of the multi-chamber air spring in Embodiment 3 of the present utility model;

[0026] Figure 6 is Figure 5 the enlarged view at A in

[0027] Labels in the figure:

[0028] 1. Support frame; 11. First convex connecting surface; 2. Rubber pad; 21. First concave connecting surface; 3. Solenoid valve; 4. Housing; 5. Pressure ring. Detailed Embodiment

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1:

[0031] As Figure 1 、 Figure 2 shown, the noise reduction combined pad includes a support frame 1 and a rubber pad 2. The bottom of the support frame 1 is tightly connected to the top of the rubber pad 2, and a cross-connection structure is formed on the connection side between the support frame 1 and the rubber pad 2. The noise reduction combined pad is of an annular structure. The inner wall area of the rubber pad 2 accounts for more than half of the inner wall area of the noise reduction combined pad, and the outer wall area of the rubber pad 2 accounts for more than half of the outer wall area of the noise reduction combined pad.

[0032] It should be noted that: the inner wall area of the rubber pad 2 accounts for more than half of the inner wall area of the noise reduction combined pad, and the outer wall area of the rubber pad 2 accounts for more than half of the outer wall area of the noise reduction combined pad; this is to make the rubber pad 2 wrap the support frame 1, so that the rubber pad 2 has a larger and more contact area with the solenoid valve 3 and the housing 4, and serves the purpose of deforming the rubber pad 2 and closely adhering to the solenoid valve 3 and the housing 4.

[0033] In this embodiment, a first convex connection surface 11 extends outward from the middle of one end of the support frame 1, and a first concave connection surface 21 is recessed inward from the middle of one end of the rubber pad 2. The first convex connection surface 11 is tightly connected to the first concave connection surface 21. Since in this embodiment, the noise reduction combined pad is of an annular structure, both the support frame 1 and the rubber pad 2 are of annular structures. The bottom of the support frame 1 extends downward to form a convex structure with a rectangular cross-section, and the convex structure and the stepped structures on both sides of the convex structure together form the first convex connection surface 11. The top of the rubber pad 2 is recessed downward to form a concave structure matching the convex structure.

[0034] It should be noted that the meaning of the convex structure and the concave structure being matched is that the two can be closely fitted, and in this embodiment, it is appropriate for the two to be in an interference fit. The first convex connection surface 11 and the first concave connection surface 21 are connected in an interference fit.

[0035] The support frame 1 and the rubber pad 2 can also adopt a vulcanized integral structure. Vulcanized integral usually refers to a production process in which vulcanization and other processes (such as forming, calendering, etc.) are completed on the same machine. The main advantage of vulcanized integral is that it can strengthen the extrusion force of the contact between materials and ensure that the products are closely fitted.

[0036] In this embodiment, the tight connection between the first convex connection surface 11 and the first concave connection surface 21, with the convex structure as the skeleton, and in the form of the rubber pad 2 wrapping the support frame 1, and the part located on the outer contact surface is mainly the rubber pad 2, can take into account the requirements of rigidity and flexibility.

[0037] In the combined washer of this embodiment, the support frame 1 serves as the skeleton of the combined washer, and the rubber pad 2 is mainly used for buffering. After the noise reduction combined washer is assembled, the solenoid valve 3 is compressed by air pressure to compress the noise reduction combined washer. The rubber pad 2 extends inwards and outwards in the thickness and diameter directions. The outer wall of the rubber pad 2 contacts the housing 4, and the inner wall of the rubber pad 2 contacts the solenoid valve 3. The sound generated when the solenoid valve 3 is switched is buffered by the rubber pad 2. At the same time, in the radial direction of the rubber pad 2, the noise of the solenoid valve 3 can be effectively isolated, achieving the purpose of reducing the air spring NVH.

[0038] Embodiment Two:

[0039] As Figure 3 、 Figure 4 shown, the difference between this embodiment and Embodiment One is that in this embodiment, the support frame 1 extends downward to form two convex structures, and correspondingly, the rubber pad 2 depresses downward to form two concave structures.

[0040] Specifically, one end of the support frame 1 extends outwards to form two first convex connection surfaces 11, one end of the rubber pad 2 depresses inwards to form two first concave connection surfaces 21, and the first convex connection surface 11 is tightly connected to the first concave connection surface 21.

[0041] The first convex connection surface 11 is connected to the first concave connection surface 21 by interference fit. Or, the support frame 1 and the rubber pad 2 can also adopt a vulcanized integral structure.

[0042] In the above Embodiment One and Embodiment Two, the inner wall of the rubber pad 2 is the solenoid valve contact surface for contacting the solenoid valve 3; the outer wall of the rubber pad 2 is the housing contact surface for contacting the housing 4.

[0043] The inner side of the end of the rubber pad 2 away from the support frame 1 has a chamfer.

[0044] Embodiment Three:

[0045] As Figure 5, As shown in the figure, this embodiment discloses a multi-chamber air spring, which includes a housing 4, a solenoid valve 3, and the above-mentioned noise reduction combined pad. An concave installation groove is formed between the outer side of the top end of the solenoid valve 3 and the inner wall of the housing 4, and the noise reduction combined pad is limited in the concave installation groove by a pressing ring 5.

[0046] In this embodiment, it is ensured as much as possible that the height difference between the inner wall and the outer wall of the rubber pad 2 and the solenoid valve 3 and the housing 4 is ±2 mm. Specifically, the outer side of the top end of the solenoid valve 3 includes a step, and the depth of the step is less than the height of the entire noise reduction combined pad by 1-2 mm, and the depth of the step is greater than the height of the inner wall of the rubber pad 2 by 1-2 mm.

[0047] When the air spring is not inflated, there is a small gap between the noise reduction combined pad, the solenoid valve 3 and the housing 4. After the air spring is inflated, the solenoid valve 3 has a compressive force on the noise reduction combined pad. When the noise reduction combined pad is axially compressed by the solenoid valve 3, it will also be radially compressed, which can effectively isolate the noise of the solenoid valve 3 and achieve the effect of low NVH of the whole vehicle.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A noise reduction composite pad, characterized in that: It includes a support frame and a rubber pad, the bottom of the support frame is tightly connected to the top of the rubber pad, and the connecting sides of the support frame and the rubber pad form a cross-connection structure; the noise reduction combination pad is an annular structure, the inner wall area of ​​the rubber pad accounts for more than half of the inner wall area of ​​the noise reduction combination pad, and the outer wall area of ​​the rubber pad accounts for more than half of the outer wall area of ​​the noise reduction combination pad.

2. The noise reduction composite pad according to claim 1, characterized in that: One end of the support frame extends outward to form at least one first protruding connection surface, and one end of the rubber pad is recessed inward to form at least one first recessed connection surface, and the first protruding connection surface is tightly connected to the first recessed connection surface.

3. The noise reduction composite pad according to claim 1, characterized in that: A middle portion of one end of the support frame extends outward to form a first protruding connection surface, and a middle portion of one end of the rubber pad is recessed inward to form a first recessed connection surface, and the first protruding connection surface is tightly connected to the first recessed connection surface.

4. The noise reduction composite pad according to claim 2 or 3, characterized in that: The first convex connection surface is connected to the first concave connection surface by interference fit.

5. The noise reduction composite pad according to claim 1, characterized in that: The support frame and the rubber pad are an integrated structure.

6. The noise reduction composite pad according to claim 1, characterized in that: The inner wall of the rubber pad is the solenoid valve contact surface, and the outer wall of the rubber pad is the shell contact surface.

7. The noise reduction composite pad according to claim 1, characterized in that: The inner side of the rubber pad away from one end of the support frame has a chamfer.

8. Multi-chamber empty spring, characterized in that: It comprises a shell, a solenoid valve, and the noise reduction combination pad described in any one of claims 1 to 7, wherein the outer side of the top end of the solenoid valve and the inner wall of the shell form a concave mounting groove, and the noise reduction combination pad is limited in the concave mounting groove by a pressure ring.

9. The multi-chamber empty spring according to claim 8, characterized in that: The outer side of the top of the solenoid valve comprises a step, the depth of the step is 1-2 mm less than the height of the entire noise reduction combination pad, and the depth of the step is 1-2 mm greater than the height of the inner wall of the rubber pad.

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