Rigidity-adjustable cushion pad for new energy commercial vehicle compressor damping system

Abstract

The invention discloses a rigidity-adjustable buffer pad for a damping system of a compressor of a new energy commercial vehicle. An upper buffer pad is formed by vulcanizing an upper buffer pad stainless metal framework, a lower wear-resistant layer framework and a rubber body; the lower buffering cushion is formed by vulcanizing a lower buffering cushion stainless metal framework, a lower buffering cushion upper flanging framework and a rubber body, the upper flanging framework is embedded into the rubber body after being vulcanized, outer layer rubber coating is achieved, the product appearance is improved, and the anti-rust capacity of the frameworks is improved. The height size of the central pipe is 3 mm shorter than that of the cushion pads in a natural state after the cushion pads are assembled, the upper cushion pad, the lower cushion pad and the central pipe form a whole after the whole vehicle is assembled and tightened, the rubber body bears certain compression, and the fatigue life of the cushion pads is prolonged. The inner walls of the rubber bodies of the upper buffer cushion and the lower buffer cushion are arranged to be conical surfaces, and a gap of 1mm is formed between the inner walls and the outer circle of the central pipe, so that the central pipe is convenient to assemble, meanwhile, the transverse rigidity of the buffer cushions can be reduced, rigidity matching of a whole compressor vibration reduction system is integrally realized, and the NVH performance of a whole vehicle is improved.

Description

An adjustable stiffness buffer pad for vibration damping systems of compressors in new energy commercial vehicles Technical Field

[0001] This invention relates to the field of vehicle vibration damping systems, and more particularly to a stiffness-adjustable buffer pad for a compressor vibration damping system used in new energy commercial vehicles. Background Technology

[0002] The air conditioning compressor in new energy commercial vehicles generates significant vibrations and impacts during operation. These vibrations are transmitted to the vehicle body through the compressor bracket, affecting the overall NVH performance of the vehicle.

[0003] Existing compressor vibration damping systems typically use rubber pads for vibration isolation. However, traditional pad structures have the following problems: First, the axial and lateral stiffness of the pads are fixed and cannot be adjusted according to actual working conditions, resulting in poor vibration damping effect. Second, the height of the pads is fixed after assembly, making it difficult to adapt to different installation spaces and stiffness requirements. Third, when the lateral stiffness of the pads is too large, it will limit the lateral displacement capacity of the system and reduce the adaptability of the vibration damping system. Fourth, the metal frame is directly exposed, making it prone to corrosion, affecting the product's appearance and service life. Fifth, the rubber body is under fatigue load for a long time, which can easily lead to fatigue cracks and reduce the service life of the buffer pad.

[0004] Therefore, it is necessary to design a compressor vibration damping pad structure with adjustable stiffness, controllable lateral stiffness, good rust resistance, and long fatigue life in order to achieve stiffness matching of the entire vibration damping system and improve the NVH performance of the whole vehicle. Summary of the Invention

[0005] The purpose of this invention is to provide a stiffness-adjustable buffer pad for the compressor vibration damping system of new energy commercial vehicles. The stiffness is adjustable through the design of the central tube height, the rust resistance and appearance quality are improved through the outer rubber coating design, the fatigue life is improved through the pre-compression design, and the lateral stiffness is controlled through the conical surface gap design, thereby achieving stiffness matching of the entire compressor vibration damping system and improving the NVH performance of the whole vehicle.

[0006] Therefore, the objective of this invention is achieved through the following technical solution: an adjustable stiffness buffer pad for a compressor vibration damping system of a new energy commercial vehicle, comprising an upper buffer pad, a lower buffer pad, and a central tube, wherein the upper and lower buffer pads are both rubber elastomers, and the central tube is inserted into the central through hole of the upper and lower buffer pads; the height of the central tube is 3mm shorter than the natural state of the buffer pads after assembly, and when the vehicle is assembled and tightened, the upper and lower buffer pads and the central tube form a whole, and the rubber body is subjected to a certain compression.

[0007] The effect is that the stiffness can be adjusted by designing the height of the central tube, and the fatigue life can be improved by designing the pre-compression. This achieves stiffness matching of the entire compressor damping system and improves the NVH performance of the whole vehicle.

[0008] Preferably, the upper buffer pad is formed by vulcanizing an upper buffer pad stainless metal skeleton, a lower wear-resistant layer skeleton, and a rubber body.

[0009] The benefits are: the stainless steel frame has good corrosion resistance, and the lower wear-resistant layer frame can improve the wear resistance of the cushioning pad and extend its service life.

[0010] Preferably, the lower buffer pad is formed by vulcanizing a stainless metal skeleton, an upper flange skeleton, and a rubber body. After vulcanization, the upper flange skeleton is embedded inside the rubber body to achieve an outer rubber coating, thereby improving the product appearance and enhancing the rust resistance of the skeleton.

[0011] The benefits are: the outer coating design not only makes the product look more beautiful, but more importantly, it can effectively protect the metal frame, prevent the frame from directly contacting the external environment, avoid rust, and significantly improve the product's rust resistance and service life.

[0012] Preferably, the lower buffer pad has an inner conical surface and an outer conical surface, which facilitates the assembly of the upper and lower buffer pads.

[0013] The effect is that the conical design can act as a guide, making the assembly process smoother and improving assembly efficiency.

[0014] Preferably, the inner walls of the rubber bodies of the upper and lower buffer pads are both made into conical surfaces, with a 1mm gap between the conical surfaces and the outer circle of the central tube, which facilitates the assembly of the central tube and reduces the lateral stiffness of the buffer pads.

[0015] The effect is that the 1mm gap design not only ensures the convenience of assembly, but also effectively reduces the lateral stiffness of the buffer pad, avoiding the limitation of system displacement by excessive lateral stiffness, and improving the adaptability of the vibration reduction system.

[0016] Preferably, the central tube is galvanized for rust prevention.

[0017] The benefits are: the galvanizing process can effectively prevent the central tube from rusting, improving the product's durability and reliability.

[0018] Preferably, the height of the entire buffer pad after assembly is adjusted by the height of the central tube, thereby adjusting the axial stiffness of the entire buffer pad.

[0019] The effect is that by replacing the center tube with one of different heights, the axial stiffness can be adjusted, making it easier to match the stiffness according to the NVH requirements of different vehicle models.

[0020] Preferably, the cone angle of the inner cone surfaces of the upper and lower buffer pads ranges from 2° to 5°.

[0021] The effect is that the selection of the cone angle needs to take into account both the ease of assembly and the effect of lateral stiffness control. A cone angle range of 2° to 5° can meet the requirements of both.

[0022] Preferably, the rubber material of the upper and lower buffer pads is natural rubber, and the Shore hardness is determined according to the stiffness of the cushion assembly, with a hardness range of Shore A50 to A80.

[0023] The benefits are that natural rubber has good elasticity and fatigue resistance, and the hardness range can be optimized according to stiffness requirements.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) The present invention, through the design of the height of the central tube (about 3mm shorter than the natural state of the buffer pad), causes the buffer pad to undergo pre-compression deformation after assembly. By adjusting the height of the central tube, the axial stiffness of the buffer pad can be adjusted to meet the stiffness matching requirements under different working conditions. Pre-compression deformation can also improve the initial stress state of the rubber body, which is beneficial to improving the fatigue life of the rubber.

[0025] (2) The present invention adopts an outer layer rubber coating design on the lower buffer pad, and embeds the upper flange skeleton into the rubber body after vulcanization. This not only improves the appearance of the product, but more importantly, it improves the rust prevention ability of the skeleton and extends the service life of the product.

[0026] (3) The present invention provides a conical surface on the inner wall of the rubber body of the upper and lower buffer pads and leaves a 1mm gap with the outer circle of the central tube, which effectively reduces the lateral stiffness of the buffer pads, avoids the limitation of system displacement by excessive lateral stiffness, and improves the adaptability of the vibration reduction system. At the same time, the 1mm gap design also facilitates the assembly of the central tube.

[0027] (4) The present invention realizes independent adjustment of axial stiffness and lateral stiffness. The axial stiffness is adjusted by the height of the central tube and the lateral stiffness is adjusted by the cone surface gap, thereby realizing the stiffness matching of the entire compressor damping system and significantly improving the NVH performance of the whole vehicle.

[0028] (5) The present invention uses a stainless steel frame and a galvanized central tube, which has good corrosion resistance and improves the durability and reliability of the product.

[0029] (6) The present invention has a simple structure, is easy to assemble and has low cost. It is applicable to the compressor vibration reduction system of new energy commercial vehicles and has good engineering application value. Attached Figure Description

[0030] Figure 1 is a schematic diagram of the overall structure in the unassembled state; Figure 2 is a schematic diagram of the overall structure in the assembled state; Figure 3 is a schematic diagram of the upper buffer pad; Figure 4 is a schematic diagram of the lower buffer pad; Figure 5 is a magnified view of part A in Figure 4.

[0031] The reference numerals in the attached drawings correspond to the following names: 1-Upper buffer pad, 11-Stainless metal skeleton of upper buffer pad, 12-Rubber body, 13-Wear-resistant layer of upper buffer pad, 14-Inner conical surface of rubber body, 2-Lower buffer pad, 21-Stainless metal lower skeleton of lower buffer pad, 22-Rubber body, 23-Upper flange skeleton of lower buffer pad, 24-Inner conical surface of lower buffer pad, 221-Outer conical surface of lower buffer pad, 222-Rubber coating layer, 3-Central tube, 4-Compressor mounting bracket, 5-Assembly clearance, 5-Frame end bracket. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the embodiments: As shown in Figures 1 and 2, an adjustable stiffness buffer pad for a compressor vibration reduction system of a new energy commercial vehicle includes an upper buffer pad 1, a lower buffer pad 2 and a central tube 3; the upper buffer pad 1 and the lower buffer pad 2 are both made of rubber elastomer and are symmetrically arranged at the upper and lower ends of the central tube 3.

[0033] As shown in Figure 3, the upper buffer pad 1 is formed by vulcanizing an upper buffer pad stainless steel skeleton 11, a lower wear-resistant layer skeleton 13, and a rubber body 12. The stainless steel skeleton is made of 304 stainless steel, which has good corrosion resistance and mechanical strength. The lower wear-resistant layer skeleton 13 is located at the bottom of the rubber body 12, which can improve the wear resistance of the buffer pad and extend its service life. The rubber body 12 is made of natural rubber with a Shore hardness of 65, which has good elasticity and fatigue resistance. The inner wall of the rubber body of the upper buffer pad 1 has an inner conical surface 14 with a cone angle of approximately 5°.

[0034] As shown in Figures 4 and 5, the lower buffer pad 2 is formed by vulcanizing a stainless metal lower frame 21, an upper flanged frame 23, and a rubber body 22. After vulcanization, the upper flanged frame 23 is embedded inside the rubber body 22, achieving an outer rubber coating 222, which improves the product appearance and enhances the frame's rust resistance. The lower buffer pad 2 has an inner conical surface 24 and an outer conical surface 221 for easy assembly of the upper and lower buffer pads. The cone angle of the inner conical surface 24 is 2-5°, and the cone angle of the outer conical surface 221 is 10°.

[0035] The central tube 3 is a metal tube body, galvanized for rust prevention, and has good corrosion resistance. The height of the central tube 3 is designed to be 3mm shorter than the total height of the upper buffer pad 1 and the lower buffer pad 2 in their natural state after assembly.

[0036] As shown in Figure 2, during vehicle assembly, the compressor mounting bracket 4 and the vehicle body bracket are connected by tightening bolts. The upper buffer pad 1 and lower buffer pad 2 undergo pre-compression deformation during assembly, and the rubber body bears a certain compressive force, causing the upper buffer pad 1, lower buffer pad 2, and central tube 3 to form a single unit. Since the height of the central tube 3 is adjustable, the overall height of the buffer pad after assembly can be adjusted by replacing central tubes of different heights, thereby adjusting the axial stiffness of the entire buffer pad.

[0037] Both the upper buffer pad 1 and the lower buffer pad 2 have conical surfaces on their inner rubber inner walls (inner conical surface 14 of the rubber inner wall and inner conical surface 24 of the lower buffer pad). An assembly clearance 5, 1 mm wide, is formed between the conical surface and the outer circle of the central tube. This conical surface fit structure facilitates the assembly of the central tube and serves as a guide; on the other hand, it effectively reduces the lateral stiffness of the buffer pads, giving the vibration damping system better displacement capability in the lateral direction and enabling independent adjustment of axial and lateral stiffness.

[0038] During assembly, the upper buffer pad 1 and the lower buffer pad 2 are first fitted onto the upper and lower ends of the central tube 3, respectively. The guiding effect of the outer conical surface 221 of the lower buffer pad makes the assembly process smoother. Then, the two ends of the central tube 3 are connected to the compressor mounting bracket 4 and the frame end bracket, and the buffer pads are pre-compressed and deformed by tightening the bolts.

[0039] Because the height of the central tube 3 is 3mm shorter than its natural state, the buffer pad undergoes axial pre-compression after assembly, and the rubber body bears a certain compressive force. By adjusting the height of the central tube 3, the axial stiffness of the buffer pad can be precisely adjusted. At the same time, the 1mm gap between the inner conical surface of the rubber body and the outer circle of the central tube effectively controls the lateral stiffness of the buffer pad, achieving independent adjustment of axial and lateral stiffness.

[0040] This invention achieves independent adjustment of the axial and lateral stiffness of the buffer pad through central tube height design, outer layer coating design, pre-compression design, and conical surface gap design. This improves the fatigue life and rust resistance of the buffer pad, effectively matches the stiffness of the entire compressor vibration damping system, and significantly improves the NVH performance of new energy commercial vehicles. The structure is simple, easy to assemble, and low in cost, showing promising prospects for engineering applications.

Claims

1. A stiffness-adjustable buffer pad for a vibration damping system of a compressor in a new energy commercial vehicle, comprising an upper buffer pad (1), a lower buffer pad (2), and a central tube (3), characterized in that: The upper buffer pad (1) and the lower buffer pad (2) are both rubber elastomers. The central tube (3) is inserted into the central through hole of the upper buffer pad (1) and the lower buffer pad (2). The height of the central tube (3) is 3mm shorter than the natural state after the buffer pads are assembled. When the whole vehicle is assembled, after tightening, the upper buffer pad (1), the lower buffer pad (2) and the central tube (3) form a whole, and the rubber body is subjected to a certain compression.

2. The stiffness-adjustable buffer pad for a compressor vibration damping system in a new energy commercial vehicle according to claim 1, characterized in that: The upper buffer pad (1) is formed by vulcanizing an upper buffer pad stainless metal skeleton (11), a lower wear-resistant layer skeleton (13), and a rubber body (12).

3. The stiffness-adjustable buffer pad for a compressor vibration damping system in a new energy commercial vehicle according to claim 1, characterized in that: The lower buffer pad (2) is formed by vulcanizing a stainless metal skeleton (21), an upper flange skeleton (23), and a rubber body (22). The upper flange skeleton (23) of the lower buffer pad (2) is embedded inside the rubber body after vulcanization, thus achieving outer rubber coating.

4. The stiffness-adjustable buffer pad for a compressor vibration damping system in a new energy commercial vehicle according to claim 3, characterized in that: The lower buffer pad (2) is provided with an inner conical surface (24) and an outer conical surface (221) to facilitate the assembly of the upper and lower buffer pads.

5. The stiffness-adjustable buffer pad for a compressor vibration damping system in a new energy commercial vehicle according to claim 1, characterized in that: The inner walls of the rubber bodies of the upper buffer pad (1) and the lower buffer pad (2) are both made into conical surfaces. The conical surfaces are separated from the outer circle of the central tube (3) by 1 mm to reduce the lateral stiffness of the buffer pads.

6. The stiffness-adjustable buffer pad for a compressor vibration damping system in a new energy commercial vehicle according to claim 1, characterized in that: The central tube (3) is galvanized for rust prevention.

7. A stiffness-adjustable buffer pad for a compressor vibration damping system in a new energy commercial vehicle according to claim 1 or 6, characterized in that: The height of the entire buffer pad after assembly is adjusted by the height dimension of the central tube (3), thereby adjusting the axial stiffness of the entire buffer pad.

8. A stiffness-adjustable buffer pad for a compressor vibration damping system in a new energy commercial vehicle according to claim 1 or 5, characterized in that: The cone angle of the inner cone surfaces of the upper buffer pad (1) and the lower buffer pad (2) ranges from 2° to 5°.

9. A stiffness-adjustable buffer pad for a compressor vibration damping system in a new energy commercial vehicle according to claim 8, characterized in that: The rubber material of the upper buffer pad (1) and the lower buffer pad (2) is natural rubber, and the Shore hardness is determined according to the stiffness of the soft pad assembly, with a hardness range of Shore A50 to A80.

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