A control arm bushing

Abstract

The application discloses a control arm bushing, which comprises an inner sleeve, an outer sleeve and a spacer sleeve arranged between the inner sleeve and the outer sleeve, rubber layers are arranged between the inner sleeve and the spacer sleeve and between the spacer sleeve and the outer sleeve, the outer wall of the middle section of the inner sleeve is concave arc-shaped, the inner wall of the middle section of the spacer sleeve is concave arc-shaped and the outer wall of the middle section of the spacer sleeve is convex arc-shaped. The outer wall of the middle section of the inner sleeve is concave arc-shaped, the inner wall of the middle section of the spacer sleeve is also concave arc-shaped and the outer wall of the middle section of the spacer sleeve is convex arc-shaped, the inner sleeve and the spacer sleeve are both variable cross-section structures, which are beneficial to optimizing the performance ratio of the bushing in each direction, increasing the axial stiffness and reducing the deflection and torsional stiffness, thereby being beneficial to improving the control stability and smoothness of the vehicle. The spacer sleeve is made of plastic material or composite material of plastic material and metal material, compared with metal material, the bushing weight is reduced, the lightweight design is realized and the vehicle operation economy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to an elastic component for a vehicle, in particular to a control arm bushing. BACKGROUND

[0002] As shown in the accompanying drawings, a common bushing generally comprises an inner sleeve, a spacer sleeve and an outer sleeve, rubber layers are arranged between the inner sleeve and the spacer sleeve and between the spacer sleeve and the outer sleeve, the inner sleeve, the spacer sleeve and the outer sleeve are cylindrical structures, and there is a problem of small axial stiffness and large torsional and deflection stiffness, which will adversely affect the stability and smoothness of the vehicle. Figure 1 AND 2 The inner sleeve, the spacer sleeve and the outer sleeve are often processed from metal pipes or rolled from metal sheets, and the metal material is usually steel or aluminum alloy, which has the disadvantage of large weight, which is not conducive to the weight reduction design of the vehicle, especially the passenger car, resulting in poor vehicle operation economy. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a control arm bushing which is beneficial to optimize the performance ratio in all directions and improve the stability and smoothness of the vehicle.

[0004] To solve the above technical problems, the present application adopts the following technical solutions:

[0005] A control arm bushing comprises an inner sleeve, an outer sleeve and a spacer sleeve arranged between the inner sleeve and the outer sleeve, rubber layers are arranged between the inner sleeve and the spacer sleeve and between the spacer sleeve and the outer sleeve, the outer wall of the middle section of the inner sleeve is concave arc-shaped, the inner wall of the middle section of the spacer sleeve is concave arc-shaped and the outer wall of the middle section of the spacer sleeve is convex arc-shaped.

[0006] As a further improvement of the above technical solution, the spacer sleeve is provided with an opening portion penetrating along the axial direction.

[0007] As a further improvement of the above technical solution, the spacer sleeve is provided with a plurality of notch portions along the axial direction.

[0008] As a further improvement of the above technical solution, the notch portions are symmetrically distributed at both ends of the spacer sleeve.

[0009] As a further improvement of the above technical solution, the spacer sleeve is a plastic spacer sleeve.

[0010] As a further improvement of the above technical solution, the plastic spacer sleeve comprises 30% to 70% glass fiber and 70% to 30% resin.

[0011] As a further improvement of the above technical solution, the spacer sleeve is a plastic and metal material composite spacer sleeve.

[0012] As a further improvement of the above technical solution: the spacer sleeve is made by plastic and metal injection molding.

[0013] As a further improvement of the above technical solution: the rubber layers on the inner and outer sides of the spacer sleeve have an axial size greater than that of the spacer sleeve and are connected integrally.

[0014] As a further improvement of the above technical solution: the inner sleeve and the outer sleeve are metal sleeves.

[0015] Compared with the prior art, the control arm bushing has the advantages that the outer wall of the middle section of the inner sleeve is concave and arc-shaped, the inner wall of the middle section of the spacer sleeve is also concave and arc-shaped, and the outer wall of the middle section of the spacer sleeve is convex and arc-shaped, the inner sleeve and the spacer sleeve are both variable cross-section structures, which is beneficial to optimizing the performance ratio of the bushing in all directions, increasing the axial stiffness and reducing the deflection and torsional stiffness, thereby improving the control stability and smoothness of the vehicle.

[0016] Further, the spacer sleeve is made of plastic material or a composite material of plastic material and metal material, which is beneficial to reducing the weight of the bushing, realizing lightweight design, and improving the economic efficiency of the vehicle compared with using metal material. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 a is a sectional view of a common bushing.

[0018] Figure 1 b is a schematic view of the end surface structure of a common bushing.

[0019] Figure 2 a is a schematic view of the deflection of a common bushing.

[0020] Figure 2 b is a schematic view of the torsion of a common bushing.

[0021] Figure 3 is a sectional view of the control arm bushing of the present application.

[0022] Figure 4 a is a schematic view of the control arm bushing of the present application.

[0023] Figure 4 b is a schematic view of the control arm bushing of the present application.

[0024] Figure 5 a is a sectional view of the spacer sleeve in the present application.

[0025] Figure 5 b is a schematic view of the spacer sleeve in the present application.

[0026] Figure 6 is a schematic view of the inner sleeve in the present application.

[0027] The labels in the diagram represent: 1. Inner sleeve; 2. Outer sleeve; 3. Spacer sleeve; 31. Opening; 32. Notch; 4. Rubber layer. Detailed Implementation

[0028] As indicated in this section and the claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include the plural. The terms "first," "second," and similar terms used in this section do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Figures 3 to 6 This illustration shows an embodiment of the control arm bushing of the present invention. The control arm bushing of this embodiment includes an inner sleeve 1, an outer sleeve 2, and a spacer 3 disposed between the inner sleeve 1 and the outer sleeve 2. Rubber layers 4 are provided between the inner sleeve 1 and the spacer 3, and between the spacer 3 and the outer sleeve 2. The outer wall of the middle section of the inner sleeve 1 is a concave arc shape, and the inner wall of the middle section of the spacer 3 is a concave arc shape while the outer wall of the middle section is a convex arc shape. See details [link to documentation]. Figure 3 The inner sleeve (concave) moves closer to the axis of the inner sleeve 1, while the outer sleeve (convex) moves away from the axis of the inner sleeve 1. Both the inner sleeve 1 and the outer sleeve 2 can be made of metal, such as commonly used steel or aluminum alloy. See details... Figure 4 The outer jacket 2 can be an open structure, a complete circular structure, or a non-open structure.

[0031] In this embodiment, the control arm bushing has an inner sleeve 1 with a concave arc-shaped outer wall in the middle section, and a spacer 3 with a concave arc-shaped inner wall in the middle section and a convex arc-shaped outer wall in the middle section. Both the inner sleeve 1 and the spacer 3 are variable cross-section structures, which is beneficial to optimizing the performance ratio of the bushing in various directions, increasing axial stiffness and reducing deflection and torsional stiffness, thereby improving the vehicle's handling stability and ride comfort.

[0032] Furthermore, in this embodiment, the spacer 3 has a through opening 31 along the axial direction. The through opening 31 on the spacer 3 makes it easier to achieve pressure balance on both the inner and outer sides of the spacer 3 during the glue injection process, thereby ensuring product quality. After the bushing is installed into the vehicle body, the opening 31 is in a nearly closed or closed state.

[0033] Furthermore, in this embodiment, the spacer 3 is provided with a plurality of notches 32 along the axial direction, which helps to make the openings 31 easier to close during the process of fitting the liner into the vehicle body.

[0034] In a preferred embodiment, the notches 32 are symmetrically distributed at both ends of the spacer 3, which helps to keep the performance of both ends of the bushing consistent.

[0035] As a preferred embodiment, the spacer 3 can be a plastic spacer, which, compared to using metal materials, helps to reduce the weight of the bushing, achieve lightweight design, and improve the economic efficiency of vehicle operation.

[0036] Furthermore, in this embodiment, the plastic spacer 3 comprises 30%–70% glass fiber and 70%–30% resin. This composition of the plastic spacer 3 balances lightweight design with performance ratios in all directions of the overall bushing.

[0037] Of course, in other embodiments, the spacer 3 can also be a composite spacer made of plastic and metal materials, which can reduce the weight of the bushing to a certain extent, achieve lightweight design, and improve the economic efficiency of vehicle operation.

[0038] Correspondingly, the composite spacer 3 made of plastic and metal can be manufactured by injection molding of plastic and metal. The plastic material includes 30% to 70% glass fiber and 70% to 30% resin, taking into account both lightweight design and overall performance ratio in all directions of the bushing.

[0039] Furthermore, in this embodiment, the axial dimensions of the rubber layers 4 on both the inner and outer sides of the spacer 3 are larger than the axial dimension of the spacer 3 and are connected as one piece. That is, the rubber layers 4 on both the inner and outer sides of the spacer 3 are connected as one piece after passing around both ends of the spacer 3, so that the spacer 3 is completely embedded in the rubber body, which can play a reinforcing role and improve the radial stiffness of the bushing.

[0040] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A control arm bushing, comprising an inner sleeve (1), an outer sleeve (2), and a spacer (3) disposed between the inner sleeve (1) and the outer sleeve (2), wherein a rubber layer (4) is provided between the inner sleeve (1) and the spacer (3), and between the spacer (3) and the outer sleeve (2), characterized in that: The outer wall of the middle section of the inner sleeve (1) is an inwardly convex arc shape, the inner wall of the middle section of the spacer (3) is an inwardly concave arc shape and the outer wall of the middle section is an outwardly convex arc shape, the spacer (3) is a plastic spacer, the plastic spacer (3) includes 30%~70% glass fiber and 70%~30% resin, the axial dimension of the rubber layer (4) on both the inner and outer sides of the spacer (3) is larger than the axial dimension of the spacer (3) and they are connected as one piece.

2. The control arm bushing according to claim 1, characterized in that: The spacer (3) has a through opening (31) along the axial direction.

3. The control arm bushing according to claim 2, characterized in that: The spacer (3) has multiple notches (32) along the axial direction.

4. The control arm bushing according to claim 3, characterized in that: The notches (32) are symmetrically distributed at both ends of the spacer (3).

5. The control arm bushing according to any one of claims 1 to 4, characterized in that: The inner sleeve (1) and the outer sleeve (2) are metal sleeves.

6. A control arm bushing, comprising an inner sleeve (1), an outer sleeve (2), and a spacer (3) disposed between the inner sleeve (1) and the outer sleeve (2), wherein a rubber layer (4) is provided between the inner sleeve (1) and the spacer (3), and between the spacer (3) and the outer sleeve (2), characterized in that: The outer wall of the middle section of the inner sleeve (1) is an inwardly convex arc shape, the inner wall of the middle section of the spacer (3) is an inwardly concave arc shape and the outer wall of the middle section is an outwardly convex arc shape, the spacer (3) is a composite spacer made of plastic and metal materials, the spacer (3) is made by plastic and metal injection molding, the axial dimension of the rubber layer (4) on both the inner and outer sides of the spacer (3) is larger than the axial dimension of the spacer (3) and they are connected as one piece.

7. The control arm bushing according to claim 6, characterized in that: The spacer (3) has a through opening (31) along the axial direction.

8. The control arm bushing according to claim 7, characterized in that: The spacer (3) has multiple notches (32) along the axial direction.

9. The control arm bushing according to claim 8, characterized in that: The notches (32) are symmetrically distributed at both ends of the spacer (3).

10. The control arm bushing according to any one of claims 6 to 9, characterized in that: The inner sleeve (1) and the outer sleeve (2) are metal sleeves.

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