Split structure swing arm bushing

Abstract

The utility model discloses a kind of split structure swing arm bushings, including first bushing;First bushing is by first outer cover, first gasket, inner cover, middle cover and first rubber integrated vulcanization;First bushing lower part is provided with second bushing;Second bushing is by second outer cover, second gasket and second rubber integrated vulcanization;First, utilize rubber injection vulcanization forming product under suitable hardness, then mainly through increasing second bushing in first bushing lower end to improve the rigidity performance of product, because product axial limit stiffness increases, so the adjustable range of product axial limit stiffness will also be larger, so that the axial stiffness and durability of first bushing are promoted, make product have good performance, make whole car have good NVH performance, satisfy the comfort requirement of consumer driving, improve customer satisfaction.

Description

Technical Field

[0001] This utility model belongs to the field of bushing technology, specifically, it relates to a split-structure swing arm bushing. Background Technology

[0002] The control arm bushing is a crucial and sophisticated rubber-metal composite component in the automotive suspension system, acting as a "joint" of the suspension. Its outer layer is a metal sleeve, press-fitted into a hole in the control arm, while the inner layer is bonded to the central metal bolt sleeve via a specially elastic rubber body. Its core function is to cushion and filter minor vibrations and impacts from the road surface through the deformation of the rubber, significantly improving ride comfort. Simultaneously, it utilizes the elastic properties of rubber to precisely control the range of motion and flexibility of the suspension control arm, which is essential for maintaining wheel alignment, ensuring vehicle handling stability, and steering precision.

[0003] NVH is a crucial comprehensive indicator for measuring vehicle quality, representing noise, vibration, and acoustic roughness. The core objective of NVH performance is to maximize the isolation, attenuation, or optimization of these unpleasant disturbances by optimizing the vehicle body structure, adding sound insulation materials, improving engine mounts, and increasing the precision of components, thereby creating a quiet, smooth, and comfortable riding environment for passengers.

[0004] In the existing technology, the axial limit of the control arm bushing can usually only be set at a single end, which not only restricts the positioning stability of the component, but also results in a lack of room for adjustment of the structural stiffness, noise, vibration and NVH performance of the control arm bushing, thus affecting product performance and failing to meet the requirements of OEMs and users for vehicle performance and comfort, and has certain limitations. Utility Model Content

[0005] To address the technical problem that existing swing arm bushings generally only allow for axial limitation at one end, and lack adjustment space for structural stiffness and NVH, thus affecting product performance and failing to meet customer needs, this utility model provides a split-structure swing arm bushing.

[0006] The objective of this utility model can be achieved through the following technical solutions: A split-type swing arm bushing includes a first bushing; the first bushing is integrally vulcanized from a first outer sleeve, a first gasket, an inner sleeve, a middle sleeve, and a first rubber; a second bushing is provided at the lower part of the first bushing; the second bushing is integrally vulcanized from a second outer sleeve, a second gasket, and a second rubber.

[0007] Furthermore, multiple evenly distributed protrusions are provided on the upper surface of the first bushing and the lower surface of the second bushing.

[0008] Furthermore, the upper part of the second rubber is provided with a ring portion, which corresponds to the position between the middle sleeve and the outer sleeve of the first bushing.

[0009] Furthermore, a second protruding edge is provided at the lower part of the second rubber; a groove is formed on the upper surface of the second protruding edge; a second outer sleeve is provided inside the groove.

[0010] Furthermore, the second outer jacket is composed of a straight cylindrical portion and a first convex edge portion, and the second outer jacket has an L-shaped structure.

[0011] Furthermore, the groove is provided with a plurality of circumferentially arrayed holes.

[0012] Furthermore, the lower part of the second rubber is provided with a third convex edge, and a second gasket is provided inside the third convex edge; a semi-circular notch in a circular array is provided at the center of the second gasket.

[0013] The beneficial effects of this utility model are: 1. This utility model first utilizes rubber to injection-cured the product at a suitable hardness. Then, it mainly improves the product's rigidity by adding a second bushing at the lower end of the first bushing. As the axial limiting rigidity of the product increases, the adjustable range of the axial limiting rigidity of the product also increases. This improves the axial rigidity and durability of the first bushing, giving the product good performance and the whole vehicle good NVH performance, meeting consumers' driving comfort requirements and improving customer satisfaction.

[0014] 2. In this utility model, a second gasket is provided inside the second bushing to enhance the structural rigidity of the second bushing and limit the excessive deformation of the second rubber layer under load through its rigid support, thereby optimizing the stress distribution, improving the load-bearing capacity and fatigue resistance of the bushing, and ensuring that the bushing maintains a stable geometric shape and vibration reduction characteristics during long-term use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the overall structure of this utility model; Figure 3 This is a top view of the overall structure of this utility model; Figure 4 This is a schematic diagram of the structure of the second rubber in this utility model; Figure 5 This is a schematic diagram of the structure of the second outer jacket in this utility model; Figure 6 This is a schematic diagram of the structure of the second gasket in this utility model; The attached diagram lists the components represented by each number as follows: 1. First bushing; 11. First outer sleeve; 12. First gasket; 13. Inner sleeve; 14. Middle sleeve; 15. First rubber; 2. Second bushing; 201. Circular part; 202. Groove; 203. Third convex edge; 204. Hole; 205. Second convex edge; 21. Second outer sleeve; 211. Straight cylinder part; 212. First convex edge; 22. Second gasket; 221. Semicircular notch; 23. Second rubber; 3. Protrusion. Detailed Implementation

[0016] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1 - Figure 3 As shown, a split-type swing arm bushing includes a first bushing 1; a second bushing 2 is provided at the lower part of the first bushing 1; the first bushing 1 is integrally vulcanized from a first outer sleeve 11, a first gasket 12, an inner sleeve 13, a middle sleeve 14, and a first rubber 15; the second bushing 2 is integrally vulcanized from a second outer sleeve 21, a second gasket 22, and a second rubber 23; a plurality of evenly distributed protrusions 3 are provided on the upper surface of the first bushing 1 and the lower surface of the second bushing 2, the protrusions 3 being used to enhance the connection stability between the first bushing 1 or the second bushing 2 and adjacent components, prevent relative displacement, and improve vibration resistance.

[0018] Please see Figure 2 , Figures 4-6As shown, the second rubber 23 has an annular portion 201 on its upper part. This annular portion 201 corresponds to the position between the middle sleeve 14 and the outer sleeve of the first bushing 1. When the first bushing 1 and the second bushing 2 are assembled via the swing arm lifting ring, a stable mechanical interlock is formed inside the structure, ensuring that the first bushing 1 and the second bushing 2 can maintain synchronous deformation when subjected to multi-directional loads, effectively improving stress distribution and enhancing the overall durability and reliability of the bushing. The second rubber 23 has a second protruding edge 205 below the annular portion 201. A groove 202 is formed on the upper surface of the second protruding edge 205, and the opening of the groove 202 faces upward. The second outer sleeve 21 is disposed inside the groove 202. 21 is L-shaped; the second outer sleeve 21 is composed of a straight cylindrical part 211 and a first convex edge part 212, and the first convex edge part 212 of the second outer sleeve 21 fits into the groove 202, and the straight cylindrical part 211 fits into the outer surface of the annular part 201; the groove 202 is provided with a plurality of circumferentially arrayed holes 204 (four are provided in this embodiment), which are used to accommodate part of the flowing rubber material when the second outer sleeve 21 and the second rubber 23 layer are vulcanized together, thereby forming mechanical anchoring points that penetrate the structure and enhancing the bonding strength between the metal and rubber components; at the same time, by optimizing the stress transmission path, the phenomenon of local stress concentration is reduced, and the fatigue resistance of the bushing under alternating loads is improved.

[0019] The lower part of the second rubber 23 is provided with a third convex edge 203, which is used to form an interference fit with the external lifting ring or connector to enhance the radial support stiffness of the bushing bottom. At the same time, it absorbs part of the axial impact load through its elastic deformation and provides an additional damping effect under vibration conditions, thereby further optimizing the vibration isolation performance and structural stability of the bushing. The third convex edge 203 is provided with a second gasket 22, which is in the form of a ring structure. The second gasket 22 is used to improve the overall stiffness of the second bushing 2 and restricts the radial expansion of the third convex edge 203 under pressure through its ring rigid structure, thereby optimizing the stress distribution. The center of the second gasket 22 is provided with a circumferential array of semi-circular notches 221 (four in this embodiment). The semi-circular notches 221 are used to optimize the local stress distribution, avoid stress concentration, and improve the structural reliability of the second bushing 2 when subjected to radial and axial combined loads.

[0020] To facilitate understanding of the above-mentioned technical solution of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below: This invention first utilizes rubber to injection-cured the product at a suitable hardness. Then, it mainly improves the product's rigidity by adding a second bushing at the lower end of the first bushing. As the axial limiting rigidity of the product increases, the adjustable range of the axial limiting rigidity of the product also increases. This improves the axial rigidity and durability of the first bushing, giving the product good performance and the whole vehicle good NVH performance, meeting consumers' driving comfort requirements and improving customer satisfaction.

[0021] In this invention, a second gasket is provided inside the second bushing to enhance the structural rigidity of the second bushing and limit the excessive deformation of the second rubber layer under load through its rigid support function, thereby optimizing the stress distribution, improving the load-bearing capacity and fatigue resistance of the bushing, and ensuring that the bushing maintains a stable geometric shape and vibration reduction characteristics during long-term use.

[0022] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A split-type swing arm bushing, comprising a first bushing (1); the first bushing (1) is integrally vulcanized from a first outer sleeve (11), a first gasket (12), an inner sleeve (13), a middle sleeve (14), and a first rubber (15); characterized in that: The first bushing (1) is provided with a second bushing (2) at the lower part; the second bushing (2) is integrally vulcanized from the second outer jacket (21), the second gasket (22) and the second rubber (23).

2. The split-type swing arm bushing according to claim 1, characterized in that: Multiple evenly distributed protrusions (3) are provided on the upper surface of the first bushing (1) and the lower surface of the second bushing (2).

3. The split-type swing arm bushing according to claim 1, characterized in that: The second rubber (23) has an annular portion (201) on its upper part, which corresponds to the position between the middle sleeve (14) and the outer sleeve of the first bushing (1).

4. The split-type swing arm bushing according to claim 1, characterized in that: The second rubber (23) has a second protruding edge (205) at the lower part; a groove (202) is provided on the upper surface of the second protruding edge (205); and a second outer sleeve (21) is provided inside the groove (202).

5. A split-type swing arm bushing according to claim 4, characterized in that: The second outer jacket (21) is composed of a straight cylindrical part (211) and a first convex edge part (212), and the second outer jacket (21) presents an L-shaped structure.

6. A split-type swing arm bushing according to claim 4, characterized in that: The groove (202) has multiple circularly arranged holes (204) inside.

7. The split-type swing arm bushing according to claim 1, characterized in that: The second rubber (23) has a third convex edge (203) at its lower part, and a second gasket (22) is provided inside the third convex edge (203); a semi-circular notch (221) in a circular array is provided at the center of the second gasket (22).

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