Commercial vehicle connecting rod bushing with multi-layer structure

Abstract

The utility model discloses a commercial vehicle connecting rod bushing with a multilayer structure. The commercial vehicle connecting rod bushing comprises an outer-layer metal sleeve, an inner-layer metal sleeve and an elastic body arranged between the outer-layer metal sleeve and the inner-layer metal sleeve. The elastic body sequentially comprises an elastic sleeve, an elastic ring and a supporting sleeve from outside to inside, and all the components are fixed in a bonding mode. The end face of the elastic ring is provided with a plurality of outwards-protruding thickening rings which are arranged in the axial direction and fixed in a bonding mode. A protection assembly is further assembled between the outer-layer metal sleeve and the inner-layer metal sleeve and comprises an outer-layer steel ring, an inner-layer steel ring and a flexible protection belt, and the outer edge and the inner edge of the protection belt are pressed between the outer-layer metal sleeve and the outer-layer steel ring and between the inner-layer metal sleeve and the inner-layer steel ring respectively. By means of the structure, the damping performance, the bearing performance, the durability performance and the protection performance of the connecting rod bushing are greatly improved, and a more efficient, durable and comfortable solution is provided for a commercial vehicle suspension system.

Description

Technical Field

[0001] The utility model relates to the technical field of bushing structures for suspension systems, and specifically relates to a multi-layer commercial vehicle link bushing. Background Art

[0002] With the continuous improvement of the performance requirements of commercial vehicles, the stability, comfort, and durability of the suspension system have become one of the key elements in vehicle design. In the suspension system of commercial vehicles, as one of the key components, the link bushing mainly functions to connect the links in the suspension system with components such as the vehicle frame and axle, bear and transmit loads, and to a certain extent, reduce vibrations and impact forces to ensure the smooth operation of the vehicle.

[0003] Traditional link bushings are usually made of metal materials. However, when facing large dynamic loads and continuous vibrations, metal bushings are prone to wear, deformation, and fatigue, resulting in a short service life of the bushings and affecting the overall performance of the vehicle. At the same time, the performance of traditional metal bushings in noise isolation and shock absorption is also not satisfactory. Especially in the unloaded or low-load state, the vehicle will experience obvious vibrations and noises, affecting driving comfort.

[0004] In order to improve the performance of bushings, in recent years, more and more technical solutions have attempted to introduce elastic materials on the basis of traditional metal bushings to enhance shock absorption and wear resistance. These solutions usually adopt a composite structure of metal and elastic materials, such as adding elastic body materials such as rubber and polyurethane between metal sleeves to provide better buffering effects, reduce impact forces and noises. However, there are still certain problems in the composite bushings in the prior art. For example, the durability of the elastic materials is poor and they are prone to aging, or due to unreasonable design, the installation is not stable, and the elastic body is prone to displacement or damage during use, thus affecting the overall performance and service life of the bushing.

[0005] Therefore, how to design a multi-layer composite bushing with a reasonable structure, high stability, strong durability, and effective vibration and noise isolation has become an urgent technical problem in commercial vehicle suspension systems. Summary of the Utility Model

[0006] Aiming at the above deficiencies existing in the prior art, the purpose of the utility model is to provide a multi-layer commercial vehicle link bushing, which greatly improves the shock absorption, load-bearing, durability, and protection performance of the link bushing, and provides a more efficient, durable, and comfortable solution for commercial vehicle suspension systems.

[0007] The technical solution adopted by the utility model to achieve the above purpose is: a multi-layer commercial vehicle link bushing, including an outer metal sleeve, an inner metal sleeve, and an elastic body disposed therebetween.

[0008] The elastomer includes an elastic sleeve, an elastic ring, and a support sleeve adhesively arranged in sequence from outside to inside. The elastic sleeve is fixedly combined with the outer metal sleeve, and the support sleeve is fixedly combined with the inner metal sleeve by adhesive bonding.

[0009] The end face of the elastic ring is provided with an outwardly convex thickening ring. The elastic rings include multiple groups arranged axially, and the thickening rings of adjacent two groups of elastic rings are fixedly combined by adhesive bonding.

[0010] It further includes a protection component assembled between the outer metal sleeve and the inner metal sleeve and arranged outside the elastomer. The protection component includes an outer steel ring, an inner steel ring, and a flexible protection belt. The outer steel ring is nested and clamped on the inner wall of the outer metal sleeve, the inner steel ring is nested and clamped on the outer wall of the inner metal sleeve, the outer edge of the flexible protection belt is pressed between the outer steel ring and the outer metal sleeve, and the inner edge of the flexible protection belt is pressed between the inner steel ring and the inner metal sleeve.

[0011] Based on the above technical solutions, in order to ensure that the elastic sleeve and the support sleeve can be accurately positioned and closely fitted on the outer metal sleeve and the inner metal sleeve respectively, the following technical solutions are provided.

[0012] An assembly groove A is formed in the middle section of the inner wall of the outer metal sleeve, and the elastic sleeve is nested and installed in the assembly groove A and fixedly bonded to the assembly groove A; an assembly groove B is formed in the middle section of the outer wall of the inner metal sleeve, and the support sleeve is nested and installed in the assembly groove B and fixedly bonded to the assembly groove B.

[0013] Based on the above technical solutions, in order to ensure that the outer steel ring and the inner steel ring can be stably installed on the outer metal sleeve and the inner metal sleeve respectively and effectively fix the flexible protection belt, the following technical solutions are provided.

[0014] Card slots A are formed at both ends of the inner wall of the outer metal sleeve, the outer steel ring is nested and clamped in the card slots A, and a flexible protection belt is provided between the card slots A and the outer steel ring; card slots B are formed at both ends of the outer wall of the inner metal sleeve, the inner steel ring is nested and clamped in the card slots B, and a flexible protection belt is provided between the card slots B and the inner steel ring.

[0015] Based on the above technical solutions, in order to ensure that the closely arranged elastic rings can be stably installed between the elastic sleeve and the support sleeve and avoid structural deformation problems such as curling and bending under stress, the thickness of the elastic ring is not less than 1.5 times the wall thickness of the elastic ring.

[0016] Based on the above technical solutions, in order to ensure that the elastic rings can be stably filled between the support sleeve and the elastic sleeve, a rubber support layer is filled inside the flexible protection belt, and the outermost elastic ring is in contact with the rubber support layer.

[0017] Beneficial effects of the utility model:

[0018] By setting the elastomer as a three-layer structure of an elastic sleeve, an elastic ring, and a support sleeve, each layer of the structure exerts its own characteristics. In addition, the multi-layer parallel design of the elastic ring can still ensure the stable operation of the bushing in the case of partial damage, and a protective component is installed on the outside to cooperate with the rubber support layer to stably support the elastic ring and effectively prevent the invasion of external dust and water vapor, which has an effective protective effect. This enables the bushing in the commercial vehicle suspension system to optimize the shock absorption and noise isolation effect under long-term load and vibration, maintain a long service life, and reduce the frequent replacement and maintenance problems of traditional metal bushings caused by wear and fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the utility model in a cutaway state;

[0021] Figure 3 It is a schematic diagram of the structure of the outer metal sleeve and the inner metal sleeve in the cut and disassembled state;

[0022] Figure 4 Detailed diagram of the elastic ring.

[0023] In the figure: 1 outer metal sleeve, 11 assembly groove A, 12 card slot A, 2 inner metal sleeve, 21 assembly groove B, 22 card slot B, 31 elastic sleeve, 32 elastic ring, 321 thickening ring, 33 support sleeve, 41 outer steel ring, 42 inner steel ring, 43 flexible protective belt, 5 rubber support layer. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] See also Figures 1-4 A multi-layered commercial vehicle connecting rod bushing comprises an outer metal sleeve 1, an inner metal sleeve 2 and an elastic body arranged therebetween.

[0026] The elastic body comprises an elastic sleeve 31, an elastic ring 32, and a support sleeve 33 which are sequentially bonded from outside to inside. The elastic sleeve 31 and the outer metal sleeve 1, and the support sleeve 33 and the inner metal sleeve 2 are fixedly assembled by bonding.

[0027] The end surface of the elastic ring 32 is provided with an outwardly protruding thickened ring 321 . The elastic ring 32 includes a plurality of groups arranged along the axial direction. The thickened rings 321 of two adjacent groups of elastic rings 32 are fixedly combined by bonding.

[0028] It also includes a protective component assembled between the outer metal sleeve 1 and the inner metal sleeve 2 and arranged on the outside of the elastomer, the protective component includes an outer steel ring 41, an inner steel ring 42, and a flexible protective belt 43. The outer steel ring 41 is nested and clamped on the inner wall of the outer metal sleeve 1, the inner steel ring 42 is nested and clamped on the outer wall of the inner metal sleeve 2, the outer edge of the flexible protective belt 43 is pressed between the outer steel ring 41 and the outer metal sleeve 1, and the inner edge of the flexible protective belt 43 is pressed between the inner steel ring 42 and the inner metal sleeve 2.

[0029] The outer metal sleeve 1 and the inner metal sleeve 2 are made of forged steel or aluminum alloy and sprayed with rust-proof and wear-resistant paint on the surface to provide stable support and connection between the heavy connecting rod bracket of the suspension system and the frame and wheel axle connection.

[0030] The support sleeve 33 is mainly used to bear a large load and enhance the support and stability of the bushing. In terms of material selection, polyurethane with higher hardness can be used, which has good wear resistance, pressure resistance and corrosion resistance. The inner support sleeve 33 is designed to have a higher hardness, which can effectively share the main pressure under the heavier load of the commercial vehicle and prevent excessive deformation.

[0031] The elastic sleeve 31 is mainly used to improve comfort, reduce noise and further buffer slight vibrations. It uses relatively soft natural rubber or NBR (nitrile rubber) with good shock absorption effect to ensure good vibration isolation effect. The outer elastic sleeve 31 adopts a soft design to significantly reduce the vibration and noise transmission of commercial vehicles when they are empty or lightly loaded.

[0032] The function of the elastic ring 32 is to provide a certain appropriate elastic deformation to optimize the vibration absorption and impact mitigation effect. It is made of materials such as high-performance silicone rubber or EPDM (ethylene propylene rubber), which can withstand high temperatures and have good elasticity and durability. This layer plays a flexible supporting role under greater pressure, helping to mitigate the impact caused by uneven road surfaces.

[0033] Moreover, multiple groups of elastic rings 32 are arranged side by side to bear the stress from the end of the outer metal sleeve 1. When some of the elastic rings 32 are damaged or cracked, the remaining intact elastic rings 32 can still play the designed function. A thickening ring 321 is also provided on the end face of each elastic ring 32. When used for a long time, it can effectively slow down the damage and cracks of the elastic ring 32, thereby improving the overall service life of the bushing.

[0034] A protective component is installed on both sides of the elastomer. The outer steel ring 41 and the inner steel ring 42 can effectively fix the flexible protective belt 43. The flexible protective belt 43 can change with the relative position change of the outer metal sleeve 1 and the inner metal sleeve 2, so that the flexible protective belt 43 can always seal the gap between the outer metal sleeve 1 and the inner metal sleeve 2, avoiding the intrusion of external water vapor and dust and affecting the service life of the elastomer, and can also effectively reduce the aging speed of the elastomer.

[0035] To ensure that the elastic sleeve 31 and the support sleeve 33 can be accurately positioned and closely fitted on the outer metal sleeve 1 and the inner metal sleeve 2 respectively, the following technical solutions are provided.

[0036] An assembly groove A11 is provided in the middle section of the inner wall of the outer metal sleeve 1. The elastic sleeve 31 is nested and installed in the assembly groove A11 and fixedly bonded to the assembly groove A11; an assembly groove B21 is provided in the middle section of the outer wall of the inner metal sleeve 2. The support sleeve 33 is nested and installed in the assembly groove B21 and fixedly bonded to the assembly groove B21.

[0037] The setting of the assembly groove A11 can realize the nested clamping and accurate positioning with the elastic sleeve 31, and the fixed combination is realized by bonding. The setting of the assembly groove B21 can realize the nested clamping and accurate positioning of the support sleeve 33, and the fixed combination is realized by bonding, so as to ensure the accuracy and stability of the installation of the elastic sleeve 31 and the support sleeve 33.

[0038] To ensure that the outer steel ring 41 and the inner steel ring 42 can be stably installed on the outer metal sleeve 1 and the inner metal sleeve 2 respectively and effectively fix the flexible protective belt 43, the following technical solutions are provided.

[0039] Claw slots A12 are provided at both ends of the inner wall of the outer metal sleeve 1. The outer steel ring 41 is nested and clamped in the claw slots A12, and a flexible protective belt 43 is provided between the claw slots A12 and the outer steel ring 41; claw slots B22 are provided at both ends of the outer wall of the inner metal sleeve 2. The inner steel ring 42 is nested and clamped in the claw slots B22, and a flexible protective belt 43 is provided between the claw slots B22 and the inner steel ring 42.

[0040] The settings of the claw slots A12 and the claw slots B22 can effectively fix the outer steel ring 41 and the inner steel ring 42, so as to avoid the outer steel ring 41 and the inner steel ring 42 falling off during vehicle driving and vibration, and further ensure that the flexible protective belt 43 can effectively block the gap between the outer metal sleeve 1 and the inner metal sleeve 2 to effectively protect the internal elastomer.

[0041] To ensure that the closely arranged elastic rings 32 of each layer can be stably installed between the elastic sleeve 31 and the support sleeve 33, and to avoid structural deformation problems such as curling and bending under stress, the thickness of the elastic ring 32 is not less than 1.5 times the wall thickness of the elastic ring 32.

[0042] Designing the elastic ring 32 to have a relatively large thickness can ensure that the elastic ring 32 is stably supported between the support sleeve 33 and the elastic sleeve 31, effectively avoiding phenomena such as curling and bending, and ensuring the durability and stability of the use of the elastic ring 32.

[0043] To ensure that the elastic rings 32 of each layer can be stably filled between the support sleeve 33 and the elastic sleeve 31, a rubber support layer 5 is filled inside the flexible protection belt 43, and the elastic ring 32 in the outer layer is in contact with the rubber support layer 5.

[0044] By filling the gap between the flexible protection belt 43 and the outermost elastic ring 32 with the rubber support layer 5, the rubber support layer 5 can not only deform with the bushing, but also stably support the inner elastic ring 32, ensuring the assembly and operation stability of the elastic ring 32.

[0045] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0046] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-layered commercial vehicle connecting rod bushing, characterized in that: It comprises an outer metal sleeve (1), an inner metal sleeve (2) and an elastic body arranged between the two, the elastic body comprising an elastic sleeve (31), an elastic ring (32) and a supporting sleeve (33) which are sequentially bonded from the outside to the inside, the elastic sleeve (31) and the outer metal sleeve (1), the supporting sleeve (33) and the inner metal sleeve (2) are fixedly assembled by bonding; The end surface of the elastic ring (32) is provided with an outwardly convex thickened ring (321), and the elastic ring (32) includes a plurality of groups arranged along the axial direction, and the thickened rings (321) of two adjacent groups of elastic rings (32) are fixedly assembled by bonding; It also includes a protective component assembled between the outer metal sleeve (1) and the inner metal sleeve (2) and arranged on the outside of the elastomer, the protective component includes an outer steel ring (41), an inner steel ring (42), and a flexible protective belt (43), the outer steel ring (41) is nested and clamped on the inner wall of the outer metal sleeve (1), the inner steel ring (42) is nested and clamped on the outer wall of the inner metal sleeve (2), the outer edge of the flexible protective belt (43) is pressed between the outer steel ring (41) and the outer metal sleeve (1), and the inner edge of the flexible protective belt (43) is pressed between the inner steel ring (42) and the inner metal sleeve (2).

2. A multi-layered commercial vehicle connecting rod bushing according to claim 1, characterized in that: The middle section of the inner wall of the outer metal sleeve (1) is provided with an assembly groove A (11), and the elastic sleeve (31) is nested and installed in the assembly groove A (11) and fixedly bonded to the assembly groove A (11); the middle section of the outer wall of the inner metal sleeve (2) is provided with an assembly groove B (21), and the support sleeve (33) is nested and installed in the assembly groove B (21) and fixedly bonded to the assembly groove B (21).

3. The multi-layered commercial vehicle connecting rod bushing according to claim 1, characterized in that: The inner wall of the outer metal sleeve (1) is provided with a card slot A (12) at both ends, the outer steel ring (41) is nested and card-engaged in the card slot A (12), and a flexible protective belt (43) is provided between the card slot A (12) and the outer steel ring (41); the outer wall of the inner metal sleeve (2) is provided with a card slot B (22) at both ends, the inner steel ring (42) is nested and card-engaged in the card slot B (22), and a flexible protective belt (43) is provided between the card slot B (22) and the inner steel ring (42).

4. The multi-layered commercial vehicle connecting rod bushing according to claim 1, characterized in that: The thickness of the elastic ring (32) is not less than 1.5 times the wall thickness of the elastic ring (32).

5. The multi-layered connecting rod bushing for commercial vehicles according to claim 1, characterized in that: The inner side of the flexible protective belt (43) is filled with a rubber support layer (5), and the elastic ring (32) on the outer layer is in contact with the rubber support layer (5).

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