Torsion beam bushing

Abstract

The utility model discloses a torsion beam lining which comprises an outer framework, an inner framework and a rubber body arranged between the outer framework and the inner framework. The main limiting end of the outer framework extends outwards to form an outer flanging, the rubber body comprises main spring rubber, the main spring rubber corresponds to the middle of the inner side of the outer framework, and main limiting end rubber corresponds to the main limiting end of the outer framework and is connected with the main spring rubber. Wherein the main limiting end rubber and the main spring rubber are arranged in a split mode, and the main spring rubber and the main limiting end rubber are different in material and hardness. The torsion beam lining can effectively prolong the service life of the torsion beam lining.

Description

Technical Field

[0001] The utility model relates to the technical field of bushings, in particular to a twist beam bushing. Background Art

[0002] In the current torsion beam bushing, the main spring rubber and the end face rubber are integrally formed and made of the same rubber compound. In the design and development of the bushing, the bushing stiffness needs to be adjusted to meet the requirements of NVH and handling performance, and the bushing rubber also needs to have sufficient durability. If the main spring rubber length and hardness are increased to improve the bushing durability, the NVH / handling requirements of the vehicle cannot be met. In addition, because the main spring rubber and the end face rubber are integrally formed, if the main spring rubber hardness needs to be lower, and the end face rubber is forced to use the same low hardness, the low hardness end face rubber cannot resist the impact load well, reducing the life of the main spring rubber. That is, it is difficult to reconcile the durability and performance of the bushing at present. Utility Model Content

[0003] The utility model aims to provide a twist beam bushing, aiming to solve the problem of improving the durability of the bushing without changing the hardness of the bushing.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A twist beam bushing, comprising: an outer frame (10), an inner frame (20) and a rubber body (30) therebetween;

[0006] The outer frame (10) comprises a main body and a main limiting end, wherein the main limiting end extends outward to form an outer flange (11).

[0007] The rubber body (30) comprises a main spring rubber (31), the main spring rubber (31) is located on the inner side of the body, the main spring rubber (31) is connected with a main limit end rubber (32), and the main limit end rubber (32) is located at the main limit end;

[0008] The main limit end rubber (32) and the main spring rubber (31) are separately provided, and the main spring rubber (31) and the main limit end rubber (32) are made of different materials and have different hardnesses.

[0009] Preferably, the hardness of the main limit end rubber (32) is greater than the hardness of the main spring rubber (31).

[0010] Preferably, the main limiting end rubber (32) is an annular structure with a rectangular cross section.

[0011] Preferably, the inner diameter of the main limit end rubber (32) is the same as the inner diameter of the outer frame (10); and the outer diameter of the main limit end rubber (32) is less than or equal to the outer diameter of the outer flange (11).

[0012] Preferably, the main limiting end rubber (32) is formed by vulcanization and fixed to the outer flange (11).

[0013] Preferably, the extension direction of the outer flange (11) is perpendicular to the axial direction of the outer frame (10).

[0014] Preferably, the outer frame (10) further comprises a secondary limiting end, wherein the secondary limiting end extends inwardly to form an inner flange (12).

[0015] Preferably, the main spring rubber (31) is connected to a secondary limit end rubber (33), and the secondary limit end rubber (33) is located at the secondary limit end.

[0016] Preferably, the outer diameter of the secondary limiting end rubber (33) is smaller than the outer diameter of the main body.

[0017] Preferably, the main spring rubber (31) and the secondary limiting end rubber (33) are integrally injection molded.

[0018] The advantages of the utility model are:

[0019] The utility model provides a torsion beam bushing, the main spring rubber and the main limit end rubber adopt a split design, which can effectively improve the durability of the torsion beam bushing while ensuring the control performance. In actual projects, the durability of the basic solution is 135,000 times, and after optimization, it is increased to 202,000 times, with obvious effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a twist beam bushing in an embodiment of the utility model;

[0021] Figure 2 It is a schematic cross-sectional structure diagram of a twist beam bushing in an embodiment of the utility model;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of an exoskeleton in an embodiment of the utility model;

[0023] Figure 4 It is a schematic cross-sectional structure diagram of an exoskeleton in an embodiment of the utility model;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of a twist beam bushing of another embodiment of the utility model;

[0025] Figure 6It is a schematic cross-sectional structure diagram of a twist beam bushing of another embodiment of the utility model;

[0026] Figure 7 It is a three-dimensional structural schematic diagram of an exoskeleton of another embodiment of the utility model;

[0027] Figure 8 It is a schematic cross-sectional structure diagram of an exoskeleton of another embodiment of the utility model.

[0028] Description of reference numerals:

[0029] 10. External frame; 11. External flange; 12. Internal flange; 20. Internal frame; 30. Rubber body; 31. Main spring rubber; 32. Main limit end rubber; 33. Secondary limit end rubber. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0031] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "vertical", "horizontal", "front", "rear" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] See attached Figures 1 to 4The torsion beam bushing provided in this embodiment includes an exoskeleton 10, an inner skeleton 20 and a rubber body 30 therebetween. The exoskeleton 10 is sleeved on the outside of the inner skeleton 20, and the inner skeleton 20 is located at the center of the exoskeleton 10. The main body of the bushing is cylindrical, and the exoskeleton 10 has a main body, a main limit end and a secondary limit end. The upper end of the exoskeleton 10 is the main limit end, and the lower end of the exoskeleton 10 is the secondary limit end. The main limit end of the exoskeleton 10 extends outward to form an outer flange 11, and the extension direction of the outer flange 11 is perpendicular to the axial direction of the exoskeleton 10. The exoskeleton 10 is integrally stamped by stamping. The rubber body 30 includes a main spring rubber 31, which is located on the inner side of the main body of the exoskeleton 10. The main spring rubber 31 is connected with a main limit end rubber 32, and the main limit end rubber 32 is located at the main limit end. Among them, the main limit end rubber 32 and the main spring rubber 31 are separately set, and the materials and hardness of the main spring rubber 31 and the main limit end rubber 32 are different. That is, the main limit end rubber 32 and the main spring rubber 31 of the rubber body 30 are designed as a split type, and each is made of rubbers of different materials and hardness, and is separately injection molded. Because the main spring rubber 31 and the main limit end rubber 32 are designed separately and independently, they do not interfere with each other. The main spring rubber 31 is designed to ensure the rigidity requirements, and the main limit end rubber 32 is selected from a rubber material that is resistant to compression and wear and has a higher hardness to ensure durability. The two are combined to obtain the optimal combination, which improves the durability of the bushing as a whole.

[0034] The main limit end rubber 32 is formed by vulcanization and fixed above the outer flange 11. Preferably, the hardness of the main limit end rubber 32 is greater than the hardness of the main spring rubber 31. The main limit end rubber 32 is a ring structure with a rectangular cross section. The vertical cross section of the main limit rubber is rectangular, and the main limit rubber is a ring structure as a whole. The inner diameter of the main limit end rubber 32 is the same as the inner diameter of the outer frame 10. In addition, the outer diameter of the main limit end rubber 32 can be less than or equal to the outer diameter of the outer flange 11.

[0035] See attached Figures 5 to 8 , the secondary limit end of the exoskeleton 10 extends inward to form an inner flange 12, and the extension direction of the inner flange 12 is perpendicular to the axial direction of the exoskeleton 10. The main spring rubber 31 is connected with the secondary limit end rubber 33, and the secondary limit end rubber 33 is located at the secondary limit end. The outer diameter of the secondary limit end rubber 33 is smaller than the outer diameter of the exoskeleton 10, and the main spring rubber 31 and the secondary limit end rubber 33 are integrally injection molded. Specifically, the outer side of the secondary limit end rubber 33 does not exceed the outer diameter of the exoskeleton 10, the inner side of the secondary limit end rubber 33 is smoothly connected with the end of the main spring rubber 31, and the secondary limit end rubber 33 extends downward and protrudes from the inner flange 12. The secondary limit end rubber 33 can enhance the axial limit of the torsion beam bushing and buffer the impact from the lateral force of the whole vehicle, strengthen the protection of the main spring rubber 31, and extend the durability. And the structural design of this exoskeleton 10 can make the entire exoskeleton 10 easier to produce.

[0036] The above are the preferred embodiments of the utility model and the technical principles used therein. For those skilled in the art, without departing from the spirit and scope of the utility model, any obvious changes such as equivalent transformation, simple replacement, etc. based on the technical solution of the utility model shall fall within the protection scope of the utility model.

Claims

1. A twist beam bushing, characterized in that: The bushing comprises: an outer frame (10), an inner frame (20) and a rubber body (30) therebetween; The outer frame (10) comprises a main body and a main limiting end, wherein the main limiting end extends outward to form an outer flange (11). The rubber body (30) comprises a main spring rubber (31), the main spring rubber (31) is located on the inner side of the body, the main spring rubber (31) is connected with a main limit end rubber (32), and the main limit end rubber (32) is located at the main limit end; The main limit end rubber (32) and the main spring rubber (31) are separately provided, and the main spring rubber (31) and the main limit end rubber (32) are made of different materials and have different hardnesses.

2. The twist beam bushing according to claim 1, characterized in that: The hardness of the main limit end rubber (32) is greater than the hardness of the main spring rubber (31).

3. The twist beam bushing according to claim 2, characterized in that: The main limiting end rubber (32) is a ring-shaped structure with a rectangular cross section.

4. The twist beam bushing according to claim 3, characterized in that: The inner diameter of the main limit end rubber (32) is the same as the inner diameter of the outer frame (10); the outer diameter of the main limit end rubber (32) is less than or equal to the outer diameter of the outer flange (11).

5. The twist beam bushing according to claim 3, characterized in that: The main limiting end rubber (32) is formed by vulcanization and fixed to the outer flange (11).

6. The twist beam bushing according to claim 3, characterized in that: The extension direction of the outer flange (11) is perpendicular to the axial direction of the outer frame (10).

7. The twist beam bushing according to claim 1, characterized in that: The outer frame (10) further comprises a secondary limiting end, wherein the secondary limiting end extends inwardly to form an inner flange (12).

8. The twist beam bushing according to claim 7, characterized in that: The main spring rubber (31) is connected to a secondary limit end rubber (33), and the secondary limit end rubber (33) is located at the secondary limit end.

9. The twist beam bushing according to claim 7, characterized in that: The outer diameter of the secondary limiting end rubber (33) is smaller than the outer diameter of the body.

10. The twist beam bushing according to claim 8, wherein: The main spring rubber (31) and the secondary limiting end rubber (33) are integrally injection molded.

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