Automobile shock absorber with recovery buffer block

Abstract

The utility model relates to the technical field of automobile shock absorbers, in particular to an automobile shock absorber with a recovery buffer block. A recovery buffer block is installed on the side, close to the guider, of the supporting ring, a through hole is formed in the middle of the recovery buffer block, arc-surface notches are formed in the top face of the recovery buffer block, the height of the arc-surface notches ranges from 1 mm to 2 mm, and the arc-surface notches are evenly and symmetrically distributed. The thickness of the top end, provided with the arc-shaped notch, of the recovery buffer block is larger than the thickness of a gap between the rest part of the recovery buffer block and the shock absorber cylinder barrel and the supporting ring, the gap is 1-1.5 mm, a gap is formed between the shock absorber cylinder barrel and the recovery buffer block, and the gap is 1.5-2 mm. The size of the gap between the shock absorber cylinder barrel and the supporting ring is consistent with the size of the gap between the shock absorber cylinder barrel and the recovery buffer block. Compared with the prior art, oil liquid rapidly circulates through the six cambered surface notches, one-time hydraulic buffering is formed, the durability of the springback cushion block is improved due to the fact that the arc-shaped notches are formed in the single face, and the service life of parts is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorber technology, specifically an automotive shock absorber with a recovery buffer block. Background Technology

[0002] Regarding the abnormal noise issue generated by automotive shock absorbers during vehicle road testing, after disassembly and analysis, we determined that the root cause of the noise lay in the functional failure of the shock absorber rebound pad. To further investigate the cause of this failure, we took a series of measures: First, we precisely measured the dimensions of the shock absorber rebound pad and conducted a detailed analysis of the physical properties of its raw materials; then, we conducted targeted bench tests for comparison, taking into account the load spectrum characteristics of the entire vehicle. Through this series of studies, we clearly identified the main cause of the failure—the durability performance of the rebound pad failed to meet the stringent requirements of vehicle road testing.

[0003] Traditional automotive shock absorbers typically use rebound pads, which are usually simple circular washers. During shock absorber operation, when the piston rod stretches due to damping requirements, the rebound pad collides with the lower end of the guide at the top of the shock absorber and deforms under pressure. However, after a period of vehicle operation, this simple circular washer design often cannot withstand continuous stress, causing the rebound pad to easily break and deform, leading to failure. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides an automotive shock absorber with a restoring buffer block, including a shock absorber cylinder, a piston rod, a guide, a support ring, and a restoring buffer block. The guide is located on the inner side of one end of the shock absorber cylinder, and the piston rod passes through the guide, such that part of the piston rod is located inside the shock absorber cylinder and part is located outside the shock absorber cylinder. A circumferential mounting groove is formed on one side of the piston rod inside the shock absorber cylinder, and a support ring is mounted thereon. A restoring buffer block is mounted on the side of the support ring near the guide. The restoring buffer block has a through hole in the middle. The original buffer block has an arc-shaped notch on its top surface, with a height of 1-2 mm. The arc-shaped notches are evenly and symmetrically distributed. The thickness of the top of the restored buffer block with the arc-shaped notch is greater than the remaining part of the restored buffer block. The bottom inner and outer sides of the restored buffer block have chamfers. There is a gap of 1-1.5 mm between the shock absorber cylinder and the support ring, and a gap of 1.5-2 mm between the shock absorber cylinder and the restored buffer block. When the restored buffer block is compressed to its limit, the gaps between the shock absorber cylinder and the support ring, and between the shock absorber cylinder and the restored buffer block are the same size.

[0005] The piston rod and the recovery buffer block are interference fit.

[0006] The support ring is a metal stamping part.

[0007] The material of the recovery buffer block is rubber.

[0008] The surface of the recovery buffer block is coated with a coating layer, which is a self-lubricating coating.

[0009] Compared with the prior art, when the rebound pad and the lower end of the guide are squeezed, the oil can flow quickly through the six arc-shaped notches, thus forming a hydraulic buffer. At the same time, the single-sided arc-shaped notches improve the durability of the rebound pad and extend the service life of the part. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a perspective view of the recovery buffer block in this utility model;

[0012] Figure 3 This is a cross-sectional view of the recovery buffer block in this utility model;

[0013] Figure 4 This is a top view of the recovery buffer block in this utility model;

[0014] Figure 5 This is a bottom view of the recovery buffer block in this utility model;

[0015] Figure 6 This is a schematic diagram of the structure of the shock absorber when the piston rod is stretched in this utility model;

[0016] See Figure 1 1. Shock absorber cylinder, 2. Piston rod, 3. Guide, 4. Support ring, 5. Restoring buffer block, 6. Arc-shaped notch, 7. Chamfer. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figure 1A type of automotive shock absorber with a restoring buffer block includes a shock absorber cylinder 1, a piston rod 2, a guide 3, a support ring 4, and a restoring buffer block 5. The guide 3 is located on the inner side of one end of the shock absorber cylinder 1. The piston rod 2 passes through the guide 3, such that part of the piston rod 2 is located inside the shock absorber cylinder 1, and part is located on the outer side of the shock absorber cylinder 1. A circumferential mounting groove is formed on one side of the piston rod 2 inside the shock absorber cylinder 1, and the support ring 4 is mounted thereon. The restoring buffer block 5 is mounted on the side of the support ring 4 near the guide 3, and the restoring buffer block 5 has a through hole in the middle. The top surface of the recovery buffer block 5 has 6 arc-shaped notches 6. The single-sided arc-shaped notches improve the durability of the rebound pad. The height of the arc-shaped notches 6 is 1-2mm. The arc-shaped notches 6 are evenly and symmetrically distributed, allowing oil to drain to the perimeter of the recovery buffer block 5. The thickness of the top of the recovery buffer block 5 with the arc-shaped notches 6 is greater than the rest of the recovery buffer block 5. By increasing the radial thickness as compensation, it helps to improve the product's durability, meet the stiffness curve requirements, and satisfy the durability conditions. The bottom 5 of the recovery buffer block has chamfers on the inner and outer sides to facilitate installation and reduce wear.

[0019] A gap of 1-1.5mm is provided between the shock absorber cylinder 1 and the support ring 4, and a gap of 1.5-2mm is provided between the shock absorber cylinder 1 and the recovery buffer block 5. When the recovery buffer block 5 is compressed to its limit, the gaps between the shock absorber cylinder 1 and the support ring 4, and between the shock absorber cylinder 1 and the recovery buffer block 5 are the same size. This gap size makes the oil flow better, prevents the oil passage cross-sectional area from changing abruptly, and prevents the oil from forming eddies, producing abnormal noise or foam.

[0020] The piston rod 2 and the recovery buffer block 5 are interference-fitted to fix the position of the recovery buffer block 5 on the piston rod 2.

[0021] The support ring 4 is a metal stamping part, and the support ring 4 is used to limit the position of the recovery buffer block 5.

[0022] The material of the recovery buffer block 5 is rubber.

[0023] The surface of the recovery buffer block 5 is coated with a self-lubricating coating to lubricate the surface and facilitate the installation of the piston rod 5.

[0024] When this utility model is in use, when the shock absorber is working, the piston rod 2 extends as the shock absorber stretches. At this time, the recovery buffer block 5 collides with the lower end of the guide 3 at the top of the shock absorber and is squeezed and deformed. When the recovery buffer block 5 and the lower end of the guide 3 are squeezed, the oil can be quickly discharged through the arc-shaped notch 6. The rapid flow makes a hydraulic buffer form at this point, thus improving the durability of the recovery buffer block 5 and extending the service life of the part.

Claims

1. A motor vehicle shock absorber with a recovery bump, comprising a shock absorber cylinder (1), a piston rod (2), a guide (3), a support ring (4), a recovery bump (5), characterized in that: The inner side of one end of the shock absorber cylinder (1) is provided with a guide (3), the piston rod (2) passes through the guide (3), so that a part of the piston rod (2) is arranged inside the shock absorber cylinder (1) and a part is arranged outside the shock absorber cylinder (1), a circumferential mounting groove is formed on one side of the piston rod (2) in the shock absorber cylinder (1) and a support ring (4) is mounted, the support ring (4) is mounted with a recovery buffer block (5) near one side of the guide (3), the recovery buffer block (5) is provided with a through hole in the middle, the top surface of the recovery buffer block (5) is provided with six arc surface notches (6), the height of the arc surface notch (6) is 1-2mm, the arc surface notches (6) are uniformly and symmetrically distributed, the thickness of the top end of the recovery buffer block (5) with the arc surface notch (6) is greater than the remaining part of the recovery buffer block (5), the inner side and the outer side of the bottom of the recovery buffer block (5) are provided with chamfers, the gap between the shock absorber cylinder (1) and the support ring (4) is 1-1.5mm, the gap between the shock absorber cylinder (1) and the recovery buffer block (5) is 1.5-2mm, when the recovery buffer block (5) is compressed to the limit, the size of the gap between the shock absorber cylinder (1) and the support ring (4) and the gap between the shock absorber cylinder (1) and the recovery buffer block (5) is consistent.

2. A shock absorber for a vehicle having a rebound bumper according to claim 1, wherein: The piston rod (2) and the recovery buffer block (5) are in interference fit.

3. The automotive shock absorber with a recovery bump stop of claim 1, wherein: The support ring (4) is a metal stamping part.

4. The automotive shock absorber with a restoring bumper block according to claim 1, characterized in that: The material of the recovery buffer block (5) is rubber.

5. The automotive shock absorber with a restoring bumper block according to claim 1, characterized in that: The surface of the recovery buffer block (5) is coated with a paint layer, and the paint layer is a self-lubricating paint. The surface of the recovery buffer block (5) is coated with a paint layer, and the paint layer is a self-lubricating paint.

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