Anti-shearing and anti-falling plate spring end antifriction pad

Abstract

The utility model relates to parts in the field of automobile industry, in particular to an anti-shearing and anti-falling plate spring end antifriction pad which comprises an antifriction rubber layer, an anti-shearing metal framework and an anti-falling rubber layer, the anti-shearing metal framework comprises an upper body and a lower surface boss, and the lower surface boss is arranged at the center of the lower portion of the upper body; the bottom end of the antifriction rubber layer is bonded to the upper surface of an upper body of the anti-shearing metal framework in a vulcanization mode, and the periphery of a boss on the lower surface of the anti-shearing metal framework is sleeved with the anti-falling rubber layer in a vulcanization bonding mode. The lower surface boss attached with the anti-falling rubber layer is matched with a hole in the end part of the plate spring in a manual interference fit press-in manner, so that the anti-falling effect can be achieved; when the anti-shearing and anti-falling plate spring end antifriction pad is used, buffering and damping effects on a plate spring end hole can be achieved, the friction force borne by the plate spring end hole is reduced, and the friction abnormal sound of the plate spring end hole can be reduced to a great extent.

Description

Technical Field

[0001] The utility model relates to parts in the field of automobile industry, in particular to a shear-resistant and fall-off-resistant leaf spring end friction-reducing pad. Background Art

[0002] With the rapid development of new energy vehicles in China, vehicle quietness has become an increasingly important concern for OEMs. Automotive leaf springs are key components and the most traditional elastic element in the suspension system. They provide cushioning, guidance, and transmission of axial forces and torque. They are characterized by a multi-plate structure. When deformed under load, the plates slide relative to each other, generating friction. This inter-plate friction inevitably causes noise. To address this, engineers have designed nylon end friction pads to mitigate inter-plate friction. However, traditional end friction pads have a short lifespan and are prone to shearing and shearing at the base, making them inadequate for the quietness requirements of current new energy vehicles. Summary of the Invention

[0003] In response to the above-mentioned deficiencies in the prior art, the utility model provides an end friction-reducing pad for an automobile leaf spring, which is installed between the two spring leaves of the automobile leaf spring and is located near the end of the leaf spring. It is used to separate the two spring leaves so that the friction-reducing pad and the spring leaves can rub against each other first. It has a long service life and can avoid the drawbacks of traditional end friction-reducing pads, thereby delaying the occurrence of friction between the leaves for a long time.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] A shear-resistant and anti-falling leaf spring end friction-reducing pad comprises a friction-reducing rubber layer, an anti-shear metal frame, and an anti-falling rubber layer. The anti-shear metal frame comprises an upper body and a lower surface boss, and the lower surface boss is arranged at a central position below the upper body; the bottom end of the friction-reducing rubber layer is vulcanized and bonded to the upper surface of the upper body of the anti-shear metal frame, and the anti-falling rubber layer is sleeved around the lower surface boss of the anti-shear metal frame by vulcanization bonding.

[0006] Furthermore, the anti-friction rubber layer is in the shape of a truncated cone that is smaller at the top and larger at the bottom.

[0007] Furthermore, the upper body of the anti-shear metal frame is disc-shaped, and the lower surface boss of the anti-shear metal frame is cylindrical.

[0008] Furthermore, the upper body and the lower surface boss of the anti-shear metal skeleton are of an integrated structure.

[0009] Furthermore, the anti-shedding rubber layer is a cylindrical rubber body with a hollow upper portion and a solid lower portion. The upper portion of the anti-shedding rubber layer is open, and a strip-shaped through groove is provided at the lower bottom end of the anti-shedding rubber layer.

[0010] Furthermore, the thickness of the anti-friction rubber layer is 5-7 mm.

[0011] Furthermore, the thickness of the upper body of the anti-shear metal skeleton is 1-2 mm.

[0012] The anti-shear and anti-falling leaf spring end friction-reducing pad provided by the utility model has a simple structure. The anti-friction rubber layer is vulcanized with the upper surface of the anti-shear metal frame, and the anti-falling rubber layer is vulcanized with the lower surface boss of the anti-shear metal frame to obtain a finished anti-friction pad. The lower surface boss with the anti-falling rubber layer is then fitted into the leaf spring end hole by artificial interference fit and press-fit to achieve the anti-falling effect. The anti-shear and anti-falling leaf spring end friction-reducing pad of the utility model can buffer and reduce the friction force on the leaf spring end hole, and can greatly reduce the friction noise of the leaf spring end hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the exploded structure of the anti-shear and anti-falling leaf spring end friction pad in the embodiment of the present utility model.

[0014] Figure 2 This is a schematic diagram of the overall structure of the anti-shear and anti-falling leaf spring end friction pad in an embodiment of the present utility model.

[0015] Figure 3 Schematic diagram of the structure of the end hole of the leaf spring.

[0016] Figure 4 This is a schematic diagram showing the installation of the anti-shear and anti-falling leaf spring end friction pad in the embodiment of the present utility model.

[0017] In the figure: 1- anti-friction rubber layer, 2- anti-shear metal frame, 3- anti-shedding rubber layer, 4- upper body, 5- lower surface boss, 6- leaf spring end hole, DETAILED DESCRIPTION

[0018] Reference Figure 1 The anti-shear and anti-falling leaf spring end friction-reducing pad of the utility model includes a friction-reducing rubber layer 1, an anti-shear metal skeleton 2, and an anti-falling rubber layer 3. The friction-reducing rubber layer 1 is in the shape of a truncated cone, and the anti-shear metal skeleton 2 includes an upper body 4 and a lower surface boss 5. The upper body 4 of the anti-shear metal skeleton 2 is in the shape of a disc, and a cylindrical lower surface boss 5 is provided at the center position below the disc-shaped upper body 4. The upper body 4 of the anti-shear metal skeleton 2 and the lower surface boss 5 are an integrally formed one-piece structure; the anti-falling rubber layer 3 is a cylindrical rubber body with a hollow upper part and a solid lower part. The upper part of the anti-falling rubber layer 3 is an opening, and the lower bottom end is provided with a strip-shaped through groove.

[0019] The end with larger diameter of the anti-friction rubber layer 1 is vulcanized and bonded to the upper surface of the upper main body 4 of the anti-shear metal skeleton 2, and the anti-shedding rubber layer 3 is sleeved around the lower surface boss 5 of the anti-shear metal skeleton 2 by vulcanization and bonding, thereby obtaining Figure 2 The finished anti-friction pad shown is vulcanized and bonded in a manner that can enhance the bond strength between the rubber and the metal.

[0020] When assembling, Figure 2 The anti-friction pad finished product shown has a lower surface boss 5 with an anti-shedding rubber layer 3 pressed into the Figure 3 The leaf spring end hole 6 shown in FIG. Figure 4 The anti-friction pad is shown in the completed installation state; wherein, the leaf spring end hole 6 is composed of a fillet band, a bright band, and a fracture band from top to bottom, and the fracture band is in the shape of a truncated cone with a small top and a large bottom. The leaf spring end hole 6 is located near the end of the leaf spring of the automobile leaf spring, which facilitates the positioning of the finished anti-friction pad between the two leaf springs of the automobile leaf spring.

[0021] Among them, the thickness of the anti-friction rubber layer 1 is 5~7mm; the thickness of the upper body of the anti-shear metal skeleton is 1~2mm; the diameter of the upper body 4 of the anti-shear metal skeleton 2 can be about 10mm smaller than the width of the spring leaf of the automobile leaf spring. For example, if the width of the spring leaf of the automobile leaf spring is 70mm, then the diameter of the upper body 4 of the anti-shear metal skeleton 2 can be designed to be 60mm; the diameter of the lower surface boss 5 of the anti-shear metal skeleton 2 can match the diameter of the leaf spring end hole 6. The outer diameter of the upper part of the anti-shedding rubber layer is slightly smaller than the outer diameter of the lower part of the anti-shedding rubber layer; in this embodiment, the outer diameter of the upper part of the anti-shedding rubber layer after vulcanization and bonding with the lower surface boss of the anti-shear metal skeleton is 12.8mm, and the outer diameter of the lower part of the anti-shedding rubber layer is 13.2mm. This design, combined with the interference fit, has the characteristic of being difficult to fall off when installed in the leaf spring end hole 6.

[0022] During installation, the lower surface boss 5 of the anti-shear metal skeleton 2 and the upper part of the anti-falling rubber layer 3 are fixed with the bright band in the leaf spring end hole 6 of one of the spring leaves. The columnar metal lower surface boss 5 can effectively enhance the anti-shear force, and the anti-falling rubber layer 3 can play a certain role in buffering and reducing friction, which can effectively prevent the root of the anti-friction pad from shearing off early. The anti-falling rubber layer 3 of the anti-friction pad is interference-fitted with the fracture band in the leaf spring end hole 6. Since the fracture band is closer to the end of the anti-shear metal skeleton 2 with a smaller diameter, the fracture band can better clamp the anti-falling rubber layer 3, enhance the strength of the matching connection between the two, and effectively prevent the anti-friction pad from falling off early. At the same time, because it is interference-fitted into the leaf spring end hole 6, the strip groove set at the bottom end of the anti-falling rubber layer 3 provides space for deformation during installation, which is convenient for installation in the hole. After installation, the strip groove of the rubber material will rebound, which can also achieve the effect of preventing falling off. The anti-friction rubber layer 1 is in direct contact with another adjacent spring leaf. When the automobile leaf spring moves, the anti-friction rubber layer 1 rubs against the contacting spring leaf, thereby preventing the adjacent spring leaves of the automobile leaf spring from directly rubbing against each other. In addition, the rubber material also has a certain elasticity, which can reduce friction and noise.

[0023] The above is a detailed description of the preferred embodiment of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A shear-resistant and anti-falling leaf spring end friction reducing pad, characterized in that: It includes a friction-reducing rubber layer, an anti-shear metal frame, and an anti-shedding rubber layer. The anti-shear metal frame includes an upper body and a lower surface boss, and the lower surface boss is arranged at the center position below the upper body; the bottom end of the friction-reducing rubber layer is vulcanized and bonded to the upper surface of the upper body of the anti-shear metal frame, and the anti-shedding rubber layer is sleeved around the lower surface boss of the anti-shear metal frame by vulcanization bonding.

2. The anti-shear and anti-falling leaf spring end friction reducing pad according to claim 1, characterized in that: The anti-friction rubber layer is in the shape of a truncated cone with a small top and a large bottom.

3. The anti-shear and anti-falling leaf spring end friction reducing pad according to claim 2, characterized in that: The upper body of the anti-shear metal frame is disc-shaped, and the lower surface boss of the anti-shear metal frame is cylindrical; the upper body and the lower surface boss of the anti-shear metal frame are an integrated structure.

4. The anti-shear and anti-falling leaf spring end friction reducing pad according to claim 3, characterized in that: The anti-shedding rubber layer is a cylindrical rubber body with a hollow upper portion and a solid lower portion. The upper portion of the anti-shedding rubber layer is open, and a strip-shaped through groove is provided at the bottom end of the lower portion of the anti-shedding rubber layer.

5. The anti-shear and anti-falling leaf spring end friction reducing pad according to claim 2, characterized in that: The thickness of the anti-friction rubber layer is 5-7 mm.

6. The anti-shear and anti-falling leaf spring end friction reducing pad according to claim 3, characterized in that: The thickness of the upper body of the anti-shear metal skeleton is 1-2 mm.

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