Shock absorber and vehicle

Abstract

The utility model relates to a shock absorber and vehicle. A shock absorber for vehicle has an outer cylinder assembly for supporting on the vehicle suspension, wherein the outer cylinder assembly has an outer cylinder, a first fork arm and a second fork arm; the first fork arm is forged into shape and is designed with a first fork arm body, a first connecting part fixedly connected with an axial one end of the outer cylinder and a second connecting part connected with the lower swing arm of the suspension; the second fork arm is stamped into shape and has a second fork arm body, a third connecting part fixedly connected with an axial one end of the outer cylinder and a fourth connecting part connected with the lower swing arm of the suspension; a stabilizer bar pull rod mounting hole is arranged on the first fork arm body. By designing the first fork arm as forged into shape and the second fork arm as sheet stamping into shape, the first fork arm is allowed to have good supporting strength when the stabilizer bar pull rod mounting hole is arranged while ensuring lightweight.

Description

Technical Field

[0001] This utility model relates to a vibration damper, and more particularly to a vibration damper with welded fork arms. Background Technology

[0002] With the rapid development of new energy vehicles, lightweight design has become an important trend in the automotive industry. Lightweighting not only helps improve fuel efficiency and reduce energy consumption, but also improves vehicle handling, acceleration performance, and safety. However, lightweight design faces many challenges in practical applications.

[0003] like Figure 1 As shown, in existing suspension systems, shock absorber wishbones are typically manufactured using sheet metal stamping to achieve lightweighting and cost control. However, sheet metal stamping of the wishbones has certain structural limitations. When mounting holes are required for installing stabilizer bars or other components, these holes are difficult to form and can easily lead to a decrease in the strength of the wishbones. This necessitates separately stamping a stabilizer bar / tie bar mounting part or other component mounting part and welding it to the outer cylinder, increasing costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an improved shock absorber that can provide good support strength when the fork arm is equipped with a stabilizer bar tie rod mounting hole, while ensuring lightweight design.

[0005] This invention solves the aforementioned problems. The shock absorber for vehicles is designed with an outer cylinder assembly for support on the vehicle's suspension. The outer cylinder assembly includes an outer cylinder, a first wishbone, and a second wishbone. The first wishbone is forged and includes a first wishbone body, a first connecting portion fixedly connected to one axial end of the outer cylinder, and a second connecting portion connected to the lower control arm of the suspension. The second wishbone is stamped and includes a second wishbone body, a third connecting portion fixedly connected to one axial end of the outer cylinder, and a fourth connecting portion connected to the lower control arm of the suspension. In this invention, a stabilizer bar mounting hole is provided on the first wishbone body. By designing the first wishbone as a forged component and the second wishbone as a stamped sheet metal component, lightweight design is ensured while allowing the first wishbone to have good support strength when the stabilizer bar mounting hole is provided.

[0006] According to a preferred embodiment of the present invention, at least one of the first wishbone body or the second wishbone body has an arcuate portion for avoiding the drive shaft. More preferably, the arcuate portion is on the first wishbone body. In automotive suspension systems, the drive shaft for driving the wheels typically needs to pass between the two wishbones of the shock absorber. By providing the arcuate portion, it can be ensured that the drive shaft does not interfere with the two wishbones during vehicle operation, thus improving vehicle safety. The arcuate portion can be provided on the forged first wishbone body or on the sheet metal stamped second wishbone body; however, the forged first wishbone body has higher strength and reliability, therefore it is preferred to provide it on the first wishbone body.

[0007] According to a preferred embodiment of the present invention, a stabilizer bar mounting portion is designed on one side of the first fork arm body, and a stabilizer bar mounting hole is provided on the stabilizer bar mounting portion. This design does not damage the structure of the first fork arm body and can improve the structural strength of the first fork arm.

[0008] According to a preferred embodiment of the present invention, the first fork arm body also has four reference portions for machining positioning and clamping. Two of the reference portions are close to the first connecting portion and located on opposite sides of the first fork arm body, and the remaining two reference portions are close to the second connecting portion and located on opposite sides of the first fork arm body. More preferably, the reference portions protrude from the side surface of the first fork arm body and each has a clamping surface for abutting with a machining fixture. One clamping surface is concave, and the other three clamping surfaces are planar. By setting the reference portions and clamping surfaces, the forged first fork arm can be stably clamped in the matching machining fixture, thereby enabling machining of the first connecting portion, the second connecting portion, and the stabilizer rod mounting hole. The three planar clamping surfaces abut against the corresponding planes on the fixture, providing good positioning and support for machining. Setting one clamping surface as concave, in conjunction with a specific fixture, can effectively prevent workers from mistakenly installing the workpiece upside down, playing a "foolproof" role, helping to improve production efficiency and yield, and reducing unnecessary production losses.

[0009] According to a preferred embodiment of the present invention, the second fork arm has stamped reinforcing ribs that extend from the third connecting portion to the fourth connecting portion. This design further increases the strength of the second fork arm.

[0010] According to a preferred embodiment of this utility model, the first connecting part and the third connecting part have arcuate surfaces that conform to the circumferential surface of one end of the outer cylinder, and the arcuate surfaces are welded and fixed to the outer cylinder. The first connecting part can also be part of a ring hoop with bolt holes, and the third connecting part can correspondingly be a stamped ring hoop with bolt holes. The first connecting part and the third connecting part are connected together by bolts or other fasteners and hold the outer cylinder tightly. However, the welding method avoids the use of ring hoops and fasteners, reduces the overall weight of the shock absorber, and is beneficial for lightweight design. More preferably, the first fork arm is made of forged steel, and the second fork arm is made of high-strength steel. Forged steel and high-strength steel have good welding performance and can be welded to the outer cylinder.

[0011] Based on the above-mentioned shock absorber design, the technical problem of this utility model can also be solved by a vehicle. After the vehicle is equipped with a shock absorber with the above-mentioned features, while ensuring lightweighting, the vehicle can be provided with stabilizer bar tie rod mounting holes or other component mounting holes on the shock absorber fork arm for mounting stabilizer bar tie rods and other components, which increases the design options and ensures sufficient structural strength, thus ensuring the safety and reliability of the vehicle. Attached Figure Description

[0012] The present invention will now be described in more detail with reference to the accompanying drawings, but this does not limit the overall concept of the invention.

[0013] Figure 1 This is a schematic diagram of a vibration damper in the prior art;

[0014] Figure 2 This is a schematic diagram of the vibration damper of this utility model;

[0015] Figure 3 These are the rear view (a) and front view (b) of the first fork arm of this utility model. Detailed Implementation

[0016] Figure 1 A vibration damper structure in the prior art is shown. Figure 1 The first fork arm 1' and the second fork arm 2' of the shock absorber shown are both formed by stamping sheet metal. Both fork arms are welded to the outer cylinder 3' at one end and connected to the suspension at the other end. Due to structural strength issues, it is impossible to provide mounting holes for installing stabilizer bars or other components on the stamped fork arms. Furthermore, the stamped fork arms can only be welded to the outer cylinder 3'; otherwise, the strength of the fork arms would be significantly reduced, resulting in limited options for the installation positions of these components.

[0017] Figure 2 , Figure 3The diagram illustrates a shock absorber outer cylinder assembly designed according to this invention, comprising an outer cylinder 3, a first fork arm 1, and a second fork arm 2. The first fork arm 1 is forged and includes a first fork arm body 15, a first connecting portion 11 fixedly connected to one axial end of the outer cylinder 3, and a second connecting portion 12 connected to the lower control arm of the suspension. The second fork arm 2 is stamped and includes a second fork arm body 25, a third connecting portion 21 fixedly connected to one axial end of the outer cylinder 3, and a fourth connecting portion 22 connected to the lower control arm of the suspension. A stabilizer bar mounting hole 131 is provided on the first fork arm body 15. By designing the first fork arm 1 as forged and the second fork arm 2 as stamped sheet metal, lightweight design is ensured while allowing the first fork arm 1 to have good support strength when the stabilizer bar mounting hole 131 or other structures are provided, facilitating the installation of the stabilizer bar or other components.

[0018] like Figure 2 As shown, the first connecting part 11 and the third connecting part 21 have arc-shaped surfaces that fit the circumferential surface of one end of the outer cylinder 3. These arc-shaped surfaces are welded and fixed to the outer cylinder 3. The first fork arm 1 is made of forged steel, and the second fork arm 2 is made of high-strength steel. The welding method avoids the use of hoops and fasteners, reducing the overall weight of the shock absorber and facilitating lightweight design. Forged steel and high-strength steel have good welding properties and can be welded to the outer cylinder 3. In other embodiments, the first connecting part 11 can also be part of a hoop with bolt holes, and the third connecting part 21 can correspondingly be a stamped hoop with bolt holes. The first connecting part 11 and the third connecting part 21 are connected together by bolts or other fasteners and hold the outer cylinder 3 tightly.

[0019] like Figure 2 As shown, the second fork arm 2 has a stamped reinforcing rib 23, which extends from the third connecting part 21 to the fourth connecting part 22, increasing the strength of the second fork arm 2.

[0020] like Figure 2 , Figure 3 As shown, the first fork arm body 15 is designed with an arc portion 4 to avoid the drive shaft. By providing the arc portion 4, it can be ensured that the drive shaft does not interfere with the two forks during vehicle operation, thereby improving vehicle safety. The first fork arm body 15 has higher strength and reliability, and therefore is preferably provided on the first fork arm body 15.

[0021] like Figure 2 , Figure 3As shown, the first fork arm body 15 also has four reference portions 14 for machining positioning and clamping. Two of the reference portions 14 are close to the first connecting portion 11 and located on opposite sides of the first fork arm body 15, while the other two reference portions 14 are close to the second connecting portion 12 and located on opposite sides of the first fork arm body 15. The reference portions 14 protrude from the side surface of the first fork arm body 15 and have clamping surfaces 141 for abutting against the machining fixture. One clamping surface 141 is concave, and the other three clamping surfaces 141 are planar. By setting the reference portions 14 and clamping surfaces 141, the forged first fork arm 1 can be stably clamped in the matching machining fixture, thereby allowing the first connecting portion 11, the second connecting portion 12, and the stabilizer rod mounting hole 131 to be machined. The three planar clamping surfaces 141 are designed to abut against the corresponding planes on the fixture, providing good positioning and support for machining. One clamping surface 141 is set as a concave surface, which, together with a specific fixture, can effectively prevent workers from mistakenly installing the workpiece upside down, playing a "foolproof" role, helping to improve production efficiency and yield, and reduce unnecessary production losses.

[0022] List of reference numerals

[0023] 1, 1' First fork arm;

[0024] 11. First connecting part;

[0025] 12 Second connecting part;

[0026] 13. Stabilizer bar tie rod mounting section;

[0027] 131 Stabilizer bar tie rod mounting hole;

[0028] 14. Reference section;

[0029] 141 Clamping surface;

[0030] 15. First fork arm body;

[0031] 2, 2' Second fork arm;

[0032] 21. Third connecting part;

[0033] 22. Fourth connecting part;

[0034] 23. Reinforcing ribs;

[0035] 25. Second fork arm body;

[0036] 3. 3' outer cylinder;

[0037] 4. Arc-shaped part.

Claims

1. A shock absorber for a vehicle, comprising an outer cylinder assembly for support on the suspension of the vehicle, characterized in that, The outer cylinder assembly has: -Outer barrel (3), - First fork arm (1), the first fork arm (1) is formed by forging, and the first fork arm (1) has a first fork arm body (15), a first connecting part (11) fixedly connected to one end of the outer cylinder (3) in the axial direction, and a second connecting part (12) connected to the lower control arm of the suspension. - Second wishbone (2), the second wishbone (2) is formed by stamping, and the second wishbone (2) has a second wishbone body (25), a third connecting part (21) fixedly connected to one end of the outer cylinder (3) in the axial direction, and a fourth connecting part (22) connected to the lower control arm of the suspension. The first fork arm body (15) is provided with a stabilizer rod mounting hole (131).

2. The vibration damper according to claim 1, characterized in that, At least one of the first fork arm (1) or the second fork arm (2) has an arc portion (4) for avoiding the drive shaft of the vehicle.

3. The vibration damper according to claim 2, characterized in that, The arc portion (4) is on the first fork arm body (15).

4. The vibration damper according to claim 1, characterized in that, The first fork arm body (15) has a stabilizer bar rod mounting part (13) on one side, and the stabilizer bar rod mounting part (13) is provided with the stabilizer bar rod mounting hole (131).

5. The vibration damper according to claim 1, characterized in that, The first fork arm body (15) is also provided with four reference parts (14) for machining positioning and clamping, two of the reference parts (14) are close to the first connecting part (11) and located on opposite sides of the first fork arm body (15), and the other two reference parts (14) are close to the second connecting part (12) and located on opposite sides of the first fork arm body (15).

6. The vibration damper according to claim 5, characterized in that, The reference part (14) protrudes from the side surface of the first fork body (15) and has a clamping surface (141) for abutting against the machining fixture, wherein one of the clamping surfaces (141) is concave and the other three clamping surfaces (141) are planar.

7. The vibration damper according to claim 1, characterized in that, The second fork arm (2) is provided with a stamped reinforcing rib (23), which extends from the third connecting part (21) to the fourth connecting part (22).

8. The vibration damper according to claim 1, characterized in that, The first connecting part (11) and the third connecting part (21) have arc surfaces that fit the circumferential surface of one end of the outer cylinder (3), and the arc surfaces are welded and fixed to the outer cylinder (3).

9. The vibration damper according to any one of claims 1 to 8, characterized in that, The first fork arm (1) is made of forged steel, and the second fork arm (2) is made of high-strength steel.

10. A vehicle, characterized in that, The vehicle has a shock absorber according to any one of claims 1 to 9.

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