A shock-absorbing pad

Abstract

This utility model discloses a shock-absorbing pad, including a support part and a rubber body covering the support part. The rubber body includes a rubber main spring, with vertically penetrating holes inside the rubber main spring. An annular rubber impact block protrudes outward from the outer surface of the rubber main spring, and the rubber impact block protrudes upward to form a protrusion. An annular groove is formed between the protrusion, the rubber impact block, and the rubber main spring. Good NVH performance: Traditional shock-absorbing pads do not have perforations in the rubber. This new design separates and perforates the rubber main spring and impact block, achieving lower dynamic and static stiffness, fully demonstrating the excellent NVH performance of the rubber components, and improving the overall vehicle comfort. Good vibration fatigue performance: This utility model's shock-absorbing pad design includes a central skeleton, and the rubber uses a separate rubber main spring and rubber impact block. The rubber main spring provides stiffness, and the rubber impact block limits movement, improving the vibration fatigue performance of the shock-absorbing pad.

Description

Technical Field

[0001] This utility model relates to the field of shock-absorbing pad technology, specifically to a shock-absorbing pad. Background Technology

[0002] Vibration damping pads, as key components for vibration isolation, are widely used in the automotive and machinery industries to attenuate vibration transmission, reduce noise, and improve system stability. Traditional vibration damping pads often employ solid rubber structures or simple geometric perforated designs, which have the following inherent drawbacks:

[0003] High dynamic and static stiffness: Due to the high material density and limited deformation space, solid rubber structures have high dynamic and static stiffness, which makes it difficult to reduce them. This affects the isolation efficiency of high-frequency vibrations and, in particular, restricts the improvement of vehicle NVH (noise, vibration and harshness) performance.

[0004] Insufficient fatigue life: The rubber body and limiting function of existing shock absorbers are usually not separated. Under long-term alternating loads, stress concentration is significant, which can easily cause rubber cracking or permanent deformation, reducing vibration fatigue life.

[0005] Structural design limitations: Although traditional perforated damping pads attempt to reduce stiffness by creating holes, the hole structure is simple (e.g., the transition of the hole walls is not optimized, and there is no layered functional design), resulting in a narrow range of stiffness adjustment and a tendency to weaken the structural strength.

[0006] Although some improvement solutions introduce metal frames to enhance support, it is still difficult to meet the requirements of low stiffness and high fatigue performance. Utility Model Content

[0007] The purpose of this invention is to solve the problem that traditional shock-absorbing pads cannot simultaneously achieve low stiffness and high fatigue performance, and to propose a shock-absorbing pad.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] A shock-absorbing pad includes a support portion and a rubber body covering the support portion. The rubber body includes a rubber main spring with a vertically penetrating hole inside. An annular rubber bumper protrudes outward from the outer surface of the rubber main spring. A protrusion is formed on the rubber bumper, and an annular groove is formed between the protrusion and the rubber main spring.

[0010] As a further embodiment of this utility model: a circular groove is provided at the bottom of the rubber main spring, the groove is coaxially connected with the hole and the diameter of the groove is larger than the diameter of the hole.

[0011] As a further embodiment of this utility model: the bottom of the hole and the groove are connected in an arc shape.

[0012] As a further embodiment of this utility model: the top of the hole expands outward to form a rounded chamfer.

[0013] As a further embodiment of this utility model, a plurality of first positioning holes are formed vertically through the protrusion.

[0014] As a further embodiment of this utility model: the first positioning holes are arranged in a ring at equal intervals along the axis of the hole, and the first positioning holes penetrate the protrusion.

[0015] As a further embodiment of this utility model: the bottom of the rubber main spring is provided with a plurality of second positioning holes, the second positioning holes being located at the bottom of the support portion.

[0016] As a further embodiment of this utility model: the support part includes a barrel and a ring, the top of the barrel and the inner wall of the ring are connected by an arc transition, the ring is embedded in the rubber impact block, the barrel is embedded in the rubber main spring, and the barrel and the ring are connected to each other and formed integrally.

[0017] As a further embodiment of this utility model: the barrel body and the ring are coaxially arranged with the rubber main spring.

[0018] As a further embodiment of this utility model, the rubber main spring, the protrusion, and the rubber impact block are integrally formed.

[0019] The beneficial effects of this invention are as follows: Significantly improved NVH performance: Compared to traditional damping pads with non-perforated rubber structures, this invention effectively reduces the dynamic-to-static stiffness ratio of the damping pad by structurally separating the rubber main spring and the impact block and introducing a perforated design. This optimized design allows the inherent excellent damping and vibration reduction characteristics of the rubber material to be fully utilized, thereby significantly improving the overall NVH (noise, vibration, and harshness) performance of the vehicle and ultimately enhancing ride comfort.

[0020] Good vibration fatigue performance: The design of this invention features a core frame in the shock-absorbing pad, and the rubber adopts a method of separating the main rubber spring and the rubber impact block. The main rubber spring provides stiffness, and the rubber impact block limits the movement, which can improve the vibration fatigue performance of the shock-absorbing pad. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a top view of the structure of this utility model;

[0024] Figure 3This is a side view structural diagram of the present invention;

[0025] Figure 4 This is a schematic diagram of the cross-section of the rubber body;

[0026] Figure 5 yes Figure 4 An inverted diagram;

[0027] Figure 6 This is a cross-sectional structural diagram of the present invention.

[0028] In the figure: 1. Rubber body; 101. Groove; 102. Slot; 103. First positioning hole; 104. Second positioning hole; 105. Rubber main spring; 106. Rubber impact block; 2. Support part; 3. Protrusion. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-6 As shown, this utility model is a shock-absorbing pad, including a support part 2 and a rubber body 1 covering the support part 2. The support part 2 is made of rigid material and is specifically a metal skeleton, while the rubber body 1 is made of EPDM rubber.

[0031] The metal skeleton and EPDM rubber are combined through a rubber injection vulcanization process to form the support and shock-absorbing pad assembly.

[0032] The shock-absorbing pad is specifically a T-shaped shock-absorbing pad.

[0033] The rubber body 1 includes a rubber main spring 105, which is an elastic body with axial compression deformation capability. Specifically, it can be achieved by composite molding of vulcanized rubber and support part. Its internal through holes can increase the deformation space in the vertical direction.

[0034] The bottom of the rubber main spring 105 has a circular groove 102, the diameter of which is larger than the diameter of the hole. The bottom of the hole and the groove 102 are connected by an arc. The top of the hole bends outward and transitions with the arc of the top of the rubber main spring 105 to form a rounded corner. The rubber main spring 105 has a vertical hole that runs through it. The outer surface of the rubber main spring 105 protrudes outward to form a ring-shaped rubber bumper 106. The rubber bumper 106 refers to the ring-shaped protrusion structure around the outer circumference of the rubber main spring 105. Specifically, it can be made by integral molding with the rubber main spring 105. The ring distribution forms a multi-directional buffer contact surface.

[0035] The rubber impact block 106 protrudes upward to form a protrusion 3. The protrusion 3 refers to the upward extension structure at the top of the rubber impact block, which can be implemented by a conical or arc-shaped design to construct multi-level buffer contact points.

[0036] An annular groove 101 is formed between the protrusion 3, the rubber bumper 106 and the rubber main spring 105. The groove 101 refers to the annular gap between the protrusion 3 and the rubber main spring 105. Specifically, the depth and width can be controlled by the mold forming to provide radial deformation space for the rubber bumper 106.

[0037] The protrusion 3 serves as a Z-axis limiter, which can improve the fatigue performance along the Z-axis.

[0038] The rubber main spring 105, the protrusion 3, and the rubber impact block 106 are integrally formed.

[0039] This application further proposes that a plurality of first positioning holes 103 are vertically formed through the protrusion 3. The plurality of first positioning holes 103 are arranged in a ring at equal intervals on the protrusion 3 with the rubber main spring 105 as the center. A plurality of second positioning holes 104 are opened at the bottom of the rubber main spring 105 located at the bottom of the support part 2.

[0040] The first positioning hole 103 and the second positioning hole 104 are used to position the support part 2 during vulcanization. There are multiple limiting columns in the upper mold and the lower mold. The multiple limiting columns press and clamp the support part 2 from the top and bottom to carry out the vulcanization process. The multiple limiting columns correspond to the above positioning holes.

[0041] Furthermore, the support component includes a barrel and a ring. The connection between the top of the barrel and the inner wall of the ring is a rounded transition. The ring is embedded in the rubber impact block, and the barrel is embedded in the rubber main spring. The barrel and the ring are connected to each other and formed as a single unit.

[0042] The barrel refers to a rigid component with a hollow cylindrical structure, which can be made of metal or high-strength composite materials. It provides axial support for the rubber main spring and restricts its radial deformation. The ring refers to a ring-shaped flat plate structure, which can be integrally molded from the same material as the barrel. It disperses the load transmitted by the rubber impact block and reduces local stress concentration. The rounded transition refers to the curved connection structure formed between the top of the barrel and the inner wall of the ring. It can be achieved by machining a rounded corner with a radius ranging from 3-5 mm to eliminate stress concentration areas caused by right-angle connections.

[0043] Excellent NVH performance: Traditional shock absorber pads do not have perforations in the rubber. This new design uses a rubber main spring and impact block that are separated and perforated, which can achieve lower dynamic and static stiffness and fully demonstrate the excellent NVH performance of the rubber components, thus improving the overall vehicle comfort.

[0044] Good vibration fatigue performance: The design of this invention features a core frame in the shock-absorbing pad, and the rubber adopts a separate rubber main spring 105 and rubber impact block 106. The rubber main spring 105 provides stiffness, and the rubber impact block 106 limits the movement, which can improve the vibration fatigue performance of the shock-absorbing pad.

[0045] It is also worth adding the following to the above content:

[0046] The support part 2 can be made of DC04 low carbon steel by stamping (thickness 2.0±0.1mm), with galvanized surface treatment (coating thickness 8-12μm), and the top is processed into a 90° outward curved rounded corner (rounded corner radius R=2.5mm);

[0047] The rubber body 1 covers the support part 2. The material is ethylene propylene diene monomer (EPDM) rubber with a Shore hardness of 50±2 Shore A and a tensile strength of ≥16MPa.

[0048] The foregoing has provided a detailed description of one embodiment of the present invention, but the description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A shock-absorbing pad, characterized in that, The device includes a support portion (2) and a rubber body (1) covering the support portion (2). The rubber body (1) includes a rubber main spring (105). The rubber main spring (105) has a hole that runs vertically through its interior. The outer surface of the rubber main spring (105) has an annular rubber bumper (106) that protrudes outward. The rubber bumper (106) has a protrusion (3) that protrudes upward. An annular groove (101) is formed between the protrusion (3) and the rubber main spring (105).

2. The shock-absorbing pad according to claim 1, characterized in that, The bottom of the rubber main spring (105) has a circular groove (102), which is coaxial with the hole and the diameter of the groove (102) is larger than the diameter of the hole.

3. A shock-absorbing pad according to claim 2, characterized in that, The bottom of the hole transitions into the groove (102) with an arc shape.

4. A shock-absorbing pad according to claim 1, characterized in that, The top of the hole expands outward to form a rounded chamfer.

5. A shock-absorbing pad according to claim 1, characterized in that, The protrusion (3) has a plurality of first positioning holes (103) formed vertically through it.

6. A shock-absorbing pad according to claim 5, characterized in that, Multiple first positioning holes (103) are arranged in a ring at equal intervals along the axis of the hole, and the first positioning holes (103) penetrate the protrusion (3).

7. A shock-absorbing pad according to claim 1, characterized in that, The bottom of the rubber main spring (105) is provided with a plurality of second positioning holes (104), and the second positioning holes (104) are located at the bottom of the support part (2).

8. A shock-absorbing pad according to any one of claims 1 to 7, characterized in that, The support part (2) includes a ring and a cylindrical thin-walled barrel. The inner ring of the ring is sleeved and connected to the upper end of the barrel, and the connection between the two is rounded. The ring is embedded in the rubber impact block (106), and the barrel is embedded in the rubber main spring (105). The barrel and the ring are connected to each other and integrally formed.

9. A shock-absorbing pad according to claim 8, characterized in that, The barrel and the ring are coaxially arranged with the rubber main spring (105).

10. A shock-absorbing pad according to claim 1, characterized in that, The rubber main spring (105), the protrusion (3) and the rubber impact block (106) are integrally formed.

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