Novel high-strength lining for auxiliary frame

Abstract

The novel high-strength lining for the auxiliary frame comprises a lining body and an aluminum outer pipe, and the aluminum outer pipe is arranged on the outer side of the lining body in a clearance fit and sleeved mode and fixed through hole shrinkage. The lining body comprises a plastic outer pipe, an inner pipe, a rubber layer and a limiting plate, the plastic outer pipe is arranged outside the inner pipe in a sleeving mode, a first protruding structure is arranged on the inner wall, close to the bottom end, of the plastic outer pipe, a second protruding structure is arranged on the outer wall, close to the top end, of the inner pipe, the portion between the plastic outer pipe and the inner pipe is filled with the rubber layer, and the limiting plate is fixedly arranged at the axial end of the inner pipe. And the limiting plate is of a secondary flanging and bending structure. According to the novel high-strength lining for the auxiliary frame, the rigidity in all directions is improved, the frame can have better controllability and comfort, meanwhile, it is guaranteed that the frame has better axial impact resistance, the aluminum outer pipe is additionally arranged on the outer side of the plastic outer pipe, the structural stability is guaranteed through the diameter shrinkage process, the requirement for press fitting force of the lining is guaranteed, and the service life of the lining is prolonged. And the loading matching attribute of the bushing can be met.

Description

Technical Field

[0001] The utility model relates to a new type of high-strength bushing for a subframe, belonging to the technical field of automobile parts. Background Art

[0002] With the rapid development of the automobile industry, the development level of electric vehicles is getting better and better, the requirements for parts are getting higher and higher, the requirements for handling performance are becoming more and more stringent, and the continuous increase in vehicle speed has greatly increased the lateral force borne by the suspension when the car moves laterally. The bushing needs to have as high Y-axis lateral stiffness as possible to make the suspension more compact, better control, and ensure stable handling. A certain X-axis longitudinal stiffness is required to ensure comfort, and a relatively high stiffness is also required in the Z direction to ensure the impact force on the frame in the axial direction.

[0003] At present, on the basis of ensuring the installation requirements, the stiffness performance of the traditional straight inner and outer tube bushings is difficult to achieve the above-mentioned stiffness ratio requirements, and the traditional special-shaped plastic outer tube structure and special-shaped inner tube structure, when the outer tube and the frame sleeve are matched, the extrusion force cannot guarantee the increasing vehicle body weight and impact force. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the stiffness ratio of the existing straight inner and outer tube bushings for automobile suspension cannot simultaneously meet the requirements of good control, good comfort and strong impact resistance, while the special-shaped plastic outer tube structure and the special-shaped inner tube structure cannot guarantee the problem of increasing vehicle body weight and impact force.

[0005] In order to solve the above technical problems, the utility model provides a new high-strength bushing for a subframe, which has improved stiffness in all directions, can make the frame have better controllability and comfort while ensuring that the frame has better axial impact resistance.

[0006] In order to achieve the above technical objectives and the above technical effects, this application is implemented through the following technical solutions:

[0007] A new type of high-strength bushing for a subframe comprises a bushing body and an aluminum outer tube, wherein the aluminum outer tube is sleeved on the outside of the bushing body with a clearance fit and fixed by reducing the diameter; the bushing body comprises a plastic outer tube, an inner tube, a rubber layer and a limit plate, wherein the plastic outer tube is sleeved outside the inner tube, a protruding structure 1 is provided on the inner wall of the plastic outer tube near the bottom end, and a protruding structure 2 is provided on the outer wall of the inner tube near the top end to form a special-shaped structure, the rubber layer is filled between the plastic outer tube and the inner tube, and the limit plate is fixedly provided at one axial end of the inner tube, and the limit plate is a secondary flanging bending structure.

[0008] Preferably, a rubber-coated structural layer is provided outside the plastic outer tube, and the thickness of the rubber-coated structural layer is 0.5 mm.

[0009] Preferably, an annular undercut structure is provided on the outer wall of the bottom end of the plastic outer tube, and the outer diameter of the undercut structure is W1 larger than the outer diameter of the plastic outer tube, and W1 is 0.5 mm.

[0010] Preferably, the fitting clearance between the aluminum outer tube and the plastic outer tube is W2, and W2 is 0.5 mm.

[0011] Preferably, chamfers are provided on the inner walls at both ends of the aluminum outer tube.

[0012] Preferably, the inner tube is a metal-plastic-coated structure, and a weight-reducing groove is provided on the second protruding structure.

[0013] Preferably, a rubber groove is provided at the bottom end of the rubber layer, and the rubber groove is provided along the axial preload direction of the bushing body and has a depth reaching one point of the protruding structure.

[0014] The utility model provides a new type of high-strength bushing for a subframe, which has the following advantages:

[0015] 1. The utility model optimizes the plastic outer tube structure of the bushing body to add a protruding structure 1, and a protruding structure 2 of the inner tube of the bushing body, which is beneficial to achieve a relatively large stiffness adjustment in the radial X and Y directions, and is also beneficial to the improvement of the axial stiffness.

[0016] 2. The utility model adds an undercut structure to the bottom end of the plastic outer tube, adds an aluminum outer tube to the outside of the plastic outer tube, fixes it to the outside of the plastic outer tube through a diameter reduction process, and realizes double fixation after the undercut structure of the plastic outer tube is reduced in diameter.

[0017] 3. The inner tube of the bushing body of the utility model is metal-coated, which is conducive to the special design of the outer contour of the inner tube and is more conducive to meeting the light weight requirement than all-metal parts.

[0018] 4. The limit plate of the bushing body of the utility model is flanged twice. One flange can make up for the lack of limit space, and the second flange can greatly improve the strength compared with the traditional flat plate structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a new type of high-strength bushing for a subframe of the utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the overall structure of a new type of high-strength bushing for a subframe, which is mainly embodied in the utility model;

[0021] Figure 3 for Figure 2 The enlarged schematic diagram of the middle A part;

[0022] Figure 4This is a partial cross-sectional view mainly showing the overall structure of the bushing body of the utility model;

[0023] In the figure:

[0024] 1-bushing body; 11-plastic outer tube; 111-protruding structure one; 112-rubber-coated structural layer; 12-inner tube; 121-protruding structure two; 13-rubber layer; 131-rubber groove; 14-limiting plate; 141-primary bending structure; 142-secondary bending structure; 2-aluminum outer tube; 3-undercut structure; 4-chamfer; 5-weight reduction groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in the field without creative work are within the scope of protection of the present utility model.

[0026] Reference Figure 1-Figure 4 A new type of high-strength bushing for a subframe includes a bushing body 1 and an aluminum outer tube 2. The aluminum outer tube 2 is sleeved on the outside of a plastic outer tube 11 with a clearance fit and fixed by reducing the diameter. The structural stability is ensured by the reducing process, which not only ensures the press-fitting force requirements of the bushing body 1, but also meets the matching properties of the bushing body 1 for vehicle installation.

[0027] Furthermore, the bushing body 1 is composed of a plastic outer tube 11, an inner tube 12, a rubber layer 13 and a limit plate 14. The plastic outer tube 11 is sleeved on the outer wall of the inner tube 12. A protruding structure 111 is integrally formed on the inner wall of the plastic outer tube 11 near the bottom end, and a protruding structure 2 121 is integrally formed on the outer wall of the inner tube 12 near the top end. Specifically, the inner tube 12 is metal-coated, which is beneficial to the special-shaped design of the protruding structure 2 121 of the outer contour of the inner tube 12, and is more conducive to meeting the lightweight requirements than all-metal parts. The rubber layer 13 is filled between the plastic outer tube 11 and the inner tube 12, and the limit plate 14 is fixedly installed at one end of the axial direction (Z direction) of the inner tube 12, and the limit plate 14 is a secondary flanging bending structure.

[0028] By optimizing the second protruding structure 121 of the inner tube 12 and the first protruding structure 111 of the plastic outer tube 11, the radial stiffness and axial stiffness can be ensured to be as high as possible, so that the bushing body 1 can withstand relatively large lateral force and axial force. The primary bending structure 141 of the limiting plate 14 can make up for the insufficient axial limiting space, and the secondary bending structure 142 can greatly improve the strength compared with the traditional flat plate structure. In this embodiment, the flanging process of the limiting plate 14 is a prior art and will not be elaborated in detail.

[0029] Reference Figure 2-Figure 4In a further embodiment, a rubber-coated structural layer 112 is integrally formed on the outside of the plastic outer tube 11 by vulcanization, and the thickness of the rubber-coated structural layer 112 is 0.5 mm. At the same time, the rubber-coated structural layer 112 can also be integrally formed with the inner tube 12 and the rubber by vulcanization. The provision of the rubber-coated structural layer 112 can avoid abnormal noise caused by the forming gap between the aluminum outer tube 2 and the plastic outer tube 11 when the aluminum outer tube 2 and the bushing body 1 are assembled.

[0030] Furthermore, an annular undercut structure 3 is integrally formed on the outer wall of the bottom end of the plastic outer tube 11. The outer diameter of the undercut structure 3 is W1 larger than the outer diameter of the plastic outer tube 11, and W1 is 0.5 mm. The undercut structure 3 can ensure that the axial compressive force strength is improved after the aluminum outer tube 2 and the bushing body 1 are reduced in diameter and fixed.

[0031] Furthermore, the matching clearance between the aluminum outer tube 2 and the plastic outer tube 11 is W2, and W2 is 0.5 mm, which can ensure that the diameter reduction process can be carried out after the aluminum outer tube 2 is installed in place.

[0032] Reference Figure 2 and Figure 3 In a further embodiment, chamfers 4 are provided on the inner walls at both ends of the aluminum outer tube 2. The chamfers 4 can play a guiding role during the assembly and reduction process of the aluminum outer tube 2 and the bushing body 1, making it easier for the bushing body 1 and the aluminum outer tube 2 to fit in place.

[0033] Reference Figure 4 In a further embodiment, a weight-reducing groove 5 is provided on the second protruding structure 121 on the inner tube 12 , and a weight-reducing groove 5 may also be provided on the first protruding structure 111 , so as to further meet the overall lightweight requirements of the bushing body 1 .

[0034] Reference Figure 2 and Figure 4 In a further embodiment, a rubber groove 131 is provided at the bottom end of the rubber layer 13. The rubber groove 131 is provided along the axial preload direction of the bushing body 1 and has a depth reaching the raised structure 111. This can ensure that when the subframe bushing is subjected to a large preload force, the rubber layer 13 is squeezed, and the linear segment requirement can be met. At the same time, excessive stress of the rubber layer 13 at the raised structure of the plastic outer tube 11 is avoided when the load is large, which is beneficial to extending the life of the bushing.

[0035] The above is only a preferred embodiment of the utility model, and is not any formal or substantial limitation of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and supplements without departing from the utility model, and these improvements and supplements should also be regarded as the protection scope of the utility model. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the utility model, which are all equivalent embodiments of the utility model; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A new type of high-strength bushing for a subframe, characterized in that: It comprises a bushing body (1) and an aluminum outer tube (2), wherein the aluminum outer tube (2) is sleeved on the outside of the bushing body (1) with a clearance fit and is fixed by reducing the diameter; The bushing body (1) comprises a plastic outer tube (11), an inner tube (12), a rubber layer (13) and a limit plate (14); the plastic outer tube (11) is sleeved outside the inner tube (12); a protruding structure (111) is provided on the inner wall of the plastic outer tube (11) near the bottom end; a protruding structure (121) is provided on the outer wall of the inner tube (12) near the top end to form a special-shaped structure; the rubber layer (13) is filled between the plastic outer tube (11) and the inner tube (12); the limit plate (14) is fixedly arranged at one axial end of the inner tube (12), and the limit plate (14) is a secondary flanging bending structure.

2. A high-strength new bushing for a subframe as claimed in claim 1, characterized in that: A rubber-encapsulated structural layer (112) is disposed outside the plastic outer tube (11), and the thickness of the rubber-encapsulated structural layer (112) is 0.5 mm.

3. A high-strength new bushing for a subframe as claimed in claim 1, characterized in that: An annular undercut structure (3) is provided on the outer wall of the bottom end of the plastic outer tube (11), and the outer diameter of the undercut structure (3) is W1 larger than the outer diameter of the plastic outer tube (11), and W1 is 0.5 mm.

4. A high-strength new bushing for a subframe as claimed in claim 1, characterized in that: The matching clearance between the aluminum outer tube (2) and the plastic outer tube (11) is W2, and W2 is 0.5 mm.

5. A new type of high-strength bushing for a subframe as claimed in claim 1, characterized in that: Chamfers (4) are provided on the inner walls of both ends of the aluminum outer tube (2).

6. A high-strength new bushing for a subframe as claimed in claim 1, characterized in that: The inner tube (12) is a metal-coated plastic structure, and a weight-reducing groove (5) is provided on the second protruding structure (121).

7. A new type of high-strength bushing for a subframe as claimed in claim 1, characterized in that: A rubber groove (131) is provided at the bottom end of the rubber layer (13), and the rubber groove (131) is provided along the axial preload direction of the bushing body (1) and has a depth reaching the first protruding structure (111).

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