Rubber cushion block with improved fatigue resistance

Abstract

The utility model provides a rubber buffer block of promoting anti -fatigue performance relates to the technical field of automobile parts, adopt the technical scheme including the circular head, the taper portion and the cylinder portion who sets up in turn along the axial direction, and the through groove who passes through circular head, taper portion and cylinder portion, the neck of the circular head and taper portion forms at the joint, and the length of taper portion is greater than cylinder portion, the utility model proper has reduced the rigidity, and has reduced the volume of buffer block, makes cup seat can accommodate bigger deformation, even if compresses to the load limit also cannot overflow cup seat, avoids being sheared and produces the damage, has improved the anti -fatigue performance.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a rubber buffer block that improves fatigue resistance. Background Technology

[0002] like Figure 1 As shown, the rear strut of the automobile includes a cup holder 10, a cylinder head 20 that slides relative to the central vertical rod 11 of the cup holder 10, and a buffer block 30 disposed between the cylinder head 20 and the cup holder 10. The buffer block 30 is deformed under pressure to provide cushioning. In an impact resistance test with a maximum load of 9000N for a certain model of buffer block, the buffer block broke after 2000 tests, requiring improvement of the buffer block. Utility Model Content

[0003] To address the problem of buffer blocks cracking during impact tests in existing technologies, this invention provides a rubber buffer block with improved fatigue resistance.

[0004] This utility model provides the following technical solution: a rubber buffer block with improved fatigue resistance, comprising a round head, a conical part and a cylindrical part arranged sequentially along the axial direction, and a through groove passing through the round head, the conical part and the cylindrical part, wherein a neck is formed at the junction of the round head and the conical part, and the length of the conical part is greater than that of the cylindrical part.

[0005] Preferably, the inner wall of the through groove is further provided with an annular groove, which is located at the end of the conical portion facing the cylindrical portion.

[0006] Preferably, the outer wall of the cylindrical portion is further provided with a flange.

[0007] Preferably, the length of the tapered portion is 20-30 mm, and the length of the cylindrical portion is 5-15 mm.

[0008] The beneficial effects of this utility model are: the length of the tapered part is greater than that of the cylindrical part, which appropriately reduces the stiffness of the buffer block and reduces the volume of the buffer block, so that the cup seat can accommodate greater deformation. Even if compressed to the load limit, it will not overflow the cup seat, avoid being sheared and causing damage, and improve the fatigue resistance. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of a prior art rear sliding buffer block.

[0010] Figure 2 A three-dimensional diagram of one embodiment of a buffer block.

[0011] Figure 3 This is a cross-sectional view of one embodiment of the buffer block.

[0012] Reference numerals: 10-cup seat, 11-vertical rod, 20-cylinder cover, 30-buffer block, 31-round head, 32-conical part, 33-cylindrical part, 34-through groove, 35-annular groove. Detailed Implementation

[0013] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0014] This utility model provides, for example Figure 2 , 3 The rubber buffer block shown comprises a round head 31, a conical portion 32, and a cylindrical portion 33 arranged sequentially along the axial direction, all integrally molded from rubber material. A necking is formed at the intersection of the round head 31 and the conical portion 32. The rubber buffer block also has an internal through groove 34 that passes through the round head 31, the conical portion 32, and the cylindrical portion 33, allowing it to fit onto a vertical rod 11. An annular groove 35 is also provided on the inner wall of the through groove 34, located at the end of the conical portion 32 facing the cylindrical portion 33. A flange is also provided on the outer wall of the cylindrical portion 33.

[0015] like Figure 1 As shown, in the prior art, when a load is applied to the buffer block 30, its round head 31 folds inward and is squeezed towards the conical part 32 as a whole. The conical part 32 and the cylindrical part 33 occupy most of the space of the cup holder 10. As the load increases, the buffer block 30 is gradually compressed to its limit, but due to the space limitation of the cup holder, some of the rubber of the buffer block 30 overflows from the cup holder 10 and is sheared by the cup holder 10 and the cylinder cover 20. The shearing position corresponds to the position of the buffer block breakage and indentation.

[0016] Therefore, in this utility model, under the premise that the axial length of the buffer block 30 and the axial length of the round head 31 remain unchanged, the length L1 of the tapered part 32 is greater than the length L2 of the cylindrical part 33. In this embodiment, the length L1 of the tapered part 32 is 20~30 mm, and the length L2 of the cylindrical part 33 is 5~15 mm. The compression amount under a 9000N load is improved from 28~29 mm in the prior art to more than 30 mm, which appropriately reduces the stiffness of the buffer block and reduces the volume of the buffer block, so that the cup seat can accommodate greater deformation and will not overflow the cup seat even when compressed to the load limit.

[0017] The improved buffer block underwent fatigue testing with a load range of 0-5000N, a frequency of 2Hz, and 500,000 cycles, as well as a stamping test with a load range of 0-9000N, a frequency of 0.5Hz, and 2000 stamping cycles. After the fatigue test, the buffer block showed no cracking, detachment, damage, or bending deformation. After the stamping test, the buffer block showed no breakage or indentation, with a free height loss of less than 10%, a height loss at the compression limit point of less than 20%, and linear segment stiffness damage of less than 30%. This demonstrates that the improved buffer block significantly enhances its fatigue resistance.

[0018] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A rubber buffer block with improved fatigue resistance, characterized in that, It includes a round head, a tapered portion and a cylindrical portion arranged sequentially along the axial direction, and a through groove passing through the round head, tapered portion and cylindrical portion. A neck is formed at the junction of the round head and the tapered portion, and the length of the tapered portion is greater than that of the cylindrical portion.

2. The rubber buffer block for improving fatigue resistance according to claim 1, characterized in that, The inner wall of the through groove is also provided with an annular groove, which is located at the end of the conical part facing the cylindrical part.

3. A rubber buffer block for improving fatigue resistance according to claim 1, characterized in that, The outer wall of the cylindrical part is also provided with a flange.

4. A rubber buffer block for improving fatigue resistance according to claim 1, characterized in that, The tapered portion has a length of 20-30 mm, and the cylindrical portion has a length of 5-15 mm.

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