Truck cab elastic bushing

Abstract

The utility model relates to the technical field of vehicle vibration reduction bushings, in particular to a truck cab elastic bushing which comprises an outer sleeve, a mandrel and rubber bodies, the outer sleeve is of a split type structure, the split position of the outer sleeve comprises a compensation gap, the rubber bodies comprise the first rubber body and the second rubber body, the first rubber body is vulcanized on the mandrel and arranged opposite to the compensation gap, and the second rubber body is vulcanized on the mandrel and arranged opposite to the compensation gap. A deformation gap is formed between the first rubber body and the outer sleeve, the first rubber body can abut against the outer sleeve, the second rubber body is connected to the outer sleeve and the mandrel, the second rubber body and the first rubber body are arranged in a staggered mode, the rubber body further comprises a first protruding portion and a second protruding portion, and the first protruding portion and the second protruding portion are connected to the two axial ends of the outer sleeve respectively. The spacer bush divides the second rubber body into an inner side rubber body and an outer side rubber body, the first rubber body is of an arc-shaped rubber body structure, and the inner side rubber body and the outer side rubber body are both of a fan-shaped rubber body structure. According to the scheme, the elastic bush has high rigidity and axial extrusion force, displacement compensation can be achieved, and the maximum deformation can be controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle vibration-damping bushings, in particular to an elastic bushing for a truck cab. Background Art

[0002] With the development of automobile technology, people have put forward higher and higher requirements for the comfort of heavy trucks. Rubber bushings are widely used in the cab suspension system of automobiles due to their good vibration isolation performance and good elasticity. They are used to provide support and vibration reduction functions for the cab, thereby improving the comfort of heavy trucks during driving. In the prior art, the following patents involve elastic bushing structures:

[0003] 1. The utility model patent with patent number "202120644514.6" and patent name "A rubber bushing for locking bracket of cab rear suspension" includes an inner sleeve, an outer sleeve and a rubber body. The outer sleeve is sleeved on the outer peripheral side of the inner sleeve and is coaxially arranged with the inner sleeve. The rubber body is bonded to the inner sleeve and the outer sleeve and vulcanized with the outer sleeve and the inner sleeve. The rubber body includes an upper limit, and left and right limit symmetrically arranged on both sides of the inner sleeve. The rubber bushing can control the maximum deformation and solve the problem of tearing and damage of existing rubber bushings due to excessive deformation under harsh working conditions.

[0004] 2. The utility model patent with the patent number "202020725135.5" and the patent name "A swing arm bushing on a cab suspension" includes an outer sleeve, a tube body, a rubber body, a center tube, an inner tube, a plastic layer, a flange portion, a through hole, a first protrusion, two second protrusions and a buffer hole. The rubber shock-absorbing bushing in this scheme adopts a structure in which the inner tube and the center tube are integrally injected, which can save time, improve efficiency, and improve the pass rate and operational safety.

[0005] However, it can be seen from the above that the rubber bushings in the prior art are mostly structures that are evenly arranged along the circumference. This arrangement ensures that the loads that the rubber bushings can withstand in all directions along the circumference are the same, and the stiffness is also the same. However, in the actual movement process, the cab will not only move up and down, but also move left and right. Although the cab is assisted by shock absorbers for displacement compensation in the direction vertical to the ground, there are usually no displacement compensation shock absorbers in the direction parallel to the ground. This will cause the rubber body in the direction parallel to the ground to bear a greater load, thereby affecting the service life of the rubber bushing. At the same time, the rubber bushings in the prior art are usually of large mass and have limited vibration reduction effects.

[0006] In summary, how to design a truck cab bushing that is light in weight, reasonable in structure, long in service life, and capable of displacement compensation is a problem that needs to be solved urgently. Utility Model Content

[0007] In order to solve the above problems, the utility model provides an elastic bushing for a truck cab, which can realize displacement compensation, control the maximum deformation, improve the rigidity and axial pressing force of the product, and improve the vibration reduction effect and service life of the product.

[0008] To achieve the above-mentioned purpose, the utility model proposes the following technical scheme: an elastic bushing for a truck cab, comprising an outer sleeve, a core shaft and a rubber body, the outer sleeve is a petal structure and the petals of the outer sleeve include a compensation gap; the rubber body includes a rubber body 1 and a rubber body 2, the rubber body 1 is vulcanized on the core shaft and is arranged opposite to the compensation gap, a deformation gap is included between the rubber body 1 and the outer sleeve and the rubber body 1 can abut against the outer sleeve, the rubber body 2 is connected to the outer sleeve and the core shaft and is staggered with the rubber body 1; the rubber body also includes a protrusion 1 and a protrusion 2 respectively connected to the axial ends of the outer sleeve.

[0009] Furthermore, a spacer is provided in the rubber body 2, which divides the rubber body 2 into an inner rubber body and an outer rubber body. The inner rubber body is connected between the spacer and the core shaft, and the outer rubber body is vulcanized between the outer sleeve and the spacer.

[0010] Furthermore, an abutment protrusion is provided on the inner wall of the outer sleeve near the compensation gap, and the rubber body 1 can abut against the abutment protrusion.

[0011] Furthermore, the rubber body 1 is an arc-shaped rubber body structure, and the radial width of the rubber body 1 is smaller than the overall radial width of the abutting protrusion at the corresponding compensation gap.

[0012] Furthermore, both the inner rubber body and the outer rubber body are fan-shaped rubber body structures.

[0013] Further, the radial width of the inner rubber body is greater than the radial width of the outer rubber body, and the radial width of the spacer is greater than the radial width of the inner rubber body.

[0014] Furthermore, the first protrusion and the second protrusion include a first concave section and a second concave section respectively.

[0015] Furthermore, a plurality of weight-reducing grooves which are concave toward one side of the core shaft are provided on the outer wall of the outer sleeve.

[0016] Furthermore, the axial length of the core shaft is greater than the axial lengths of the outer sleeve and the rubber body.

[0017] Furthermore, the outer sleeve is a two-petal structure, specifically including outer sleeve one and outer sleeve two, and the compensation gap is formed at the connection between outer sleeve one and outer sleeve two; rubber body one, rubber body two and spacer sleeve all include two symmetrically arranged groups, and rubber body one and rubber body two are arranged vertically.

[0018] The beneficial effects of the utility model are:

[0019] 1. This solution includes a solid structure (such as the rubber body 2 of the fan-shaped rubber body structure), a hollow structure (such as the deformation gap, the interval between the rubber body 1 and the rubber body 2, etc.), and a limiting structure (such as the limiting of the rubber body 1 by the abutting protrusion, the limiting between the two outer shells, etc.). By designing the solid, hollow and limiting structures in the structure, it is ensured that the structure can achieve displacement compensation while controlling the maximum deformation.

[0020] 2. This solution takes into account the ductility and shrinkage of the material. The outer frame of the rubber bushing, i.e., the outer jacket, adopts a two-petal structure, which improves the rigidity and axial extrusion force of the product.

[0021] 3. In this solution, the rubber body includes protrusion 2 and protrusion 1 at both ends, which can reduce the impact on the flip arm when the lateral displacement of the cab is too large, thereby improving the vibration reduction effect and service life of the product.

[0022] 4. The concave sections 1 and 2 in this solution are beneficial to the model positioning of the mold during the product vulcanization process and improve the process performance of the product.

[0023] 5. This solution can achieve lightweight structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the elastic bushing provided in the embodiment of the utility model.

[0025] Figure 2 It is a top view of the elastic bushing provided in the embodiment of the utility model.

[0026] Figure 3 It is a side view of the elastic bushing provided in the embodiment of the utility model.

[0027] Figure numerals: core shaft 1, outer sleeve 1 2, outer sleeve 2 3, rubber body 1 4, rubber body 2 5, inner rubber body 6, outer rubber body 7, compensation gap 8, deformation gap 9, abutment protrusion 10, protrusion 1 11, protrusion 2 12, concave section 1 13, concave section 2 14, weight reduction groove 15, spacer 16, abutment platform 17. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following Figure 1-3 It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation on the present invention.

[0029] A truck cab elastic bushing includes a jacket, a core shaft 1 and a rubber body. The axial length of the core shaft 1 is greater than the axial length of the jacket and the rubber body. The jacket is made of metal aluminum. At the same time, a plurality of weight-reducing grooves 15 concave toward one side of the core shaft 1 are provided on the outer wall of the jacket, so as to achieve lightweight structure. The jacket is a petal structure and the petals of the jacket include compensation gaps 8. The design of the petal structure and the compensation gaps 8 can improve the rigidity and axial extrusion force of the product and improve the service life of the rubber bushing. Figure 1 , Figure 2 As shown, the present embodiment includes two outer sleeves, specifically, an outer sleeve 1 2 and an outer sleeve 2 3 , and a compensation gap 8 is formed at the connection between the outer sleeve 1 2 and the outer sleeve 2 3 .

[0030] like Figure 1 , Figure 2 As shown, the rubber body includes a rubber body 1 4 and a rubber body 2 5. The rubber body 1 4 is vulcanized on the core shaft 1 and is arranged opposite to the compensation gap 8. A deformation gap 9 is included between the rubber body 1 4 and the outer sleeve. The rubber body 2 5 is connected to the outer sleeve and the core shaft 1 and is staggered with the rubber body 1 4. The outer sleeve 1 2 and the outer sleeve 2 3 are both provided with a rubber body 2 5. The rubber bodies 2 5 on the outer sleeve 1 2 and the outer sleeve 2 3 are symmetrically arranged, that is, the rubber body 1 4, the rubber body 2 5 and the spacer 16 in this embodiment all include two symmetrically arranged groups, and the rubber body 1 4 and the rubber body 2 5 are vertically arranged.

[0031] An abutment protrusion 10 is provided on the inner wall of the outer sleeve near the compensation gap 8. The outer sleeve is provided with an abutment platform 17 extending toward the core shaft 1 at the compensation gap 8. The abutment protrusion 10 is provided on the inner wall of the abutment platform 17. The rubber body 14 can abut against the abutment protrusion 10. During the operation of the vehicle, the rubber body 14 can provide radial-to-air stiffness to limit the maximum deformation of the rubber body 25 on both sides of the radial-to-air direction. When the deformation is too large, the rubber body 14 will contact the abutment protrusion 10 on the outer sleeve for limiting the position, which can avoid the phenomenon of tearing and damage of the rubber body 25 due to excessive deformation, ensuring that the structure can achieve displacement compensation while controlling the maximum deformation and improving the mission life.

[0032] like Figure 3 As shown, the rubber body also includes a protrusion 11 and a protrusion 12 respectively connected to the two axial ends of the outer sleeve, and the protrusion 11 and the protrusion 12 respectively include a concave section 13 and a concave section 14. The protrusion 11 and the protrusion 12 can attenuate the impact on the flip arm when the lateral displacement of the cab is too large, thereby improving the vibration reduction effect and service life of the elastic bushing. The concave section 13 and the concave section 14 are beneficial to the model positioning of the mold during the product vulcanization process, thereby improving the process performance of the product.

[0033] like Figure 1 , Figure 2As shown, a spacer sleeve 16 is provided in the rubber body 2 5, and the spacer sleeve 16 divides the rubber body 2 5 into an inner rubber body 6 and an outer rubber body 7. The spacer sleeve 16 can improve the rigidity of the rubber body. The inner rubber body 6 is connected between the spacer sleeve 16 and the core shaft 1, and the outer rubber body 7 is vulcanized between the outer sleeve and the spacer sleeve 16. The rubber body 1 4 is an arc-shaped rubber body structure, and the radial width of the rubber body 1 4 is smaller than the overall radial width of the abutting protrusion 10 at the corresponding compensation gap 8, so as to ensure that the rubber body 1 4 can completely abut against the abutting protrusion 10 for limiting. The inner rubber body 6 and the outer rubber body 7 are both fan-shaped rubber body structures, and the radial width of the inner rubber body 6 is larger than the radial width of the outer rubber body 7. The radial width of the spacer sleeve 16 is larger than the radial width of the inner rubber body 6, which can improve the vibration reduction performance while ensuring the rigidity.

[0034] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0035] The above specific implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An elastic bushing for a truck cab, comprising an outer sleeve, a core shaft (1) and a rubber body, characterized in that: The outer sleeve is a split-petal structure and the split portion of the outer sleeve includes a compensation gap (8); the rubber body includes a rubber body 1 (4) and a rubber body 2 (5); the rubber body 1 (4) is vulcanized on the core shaft (1) and is arranged opposite to the compensation gap (8); a deformation gap (9) is included between the rubber body 1 (4) and the outer sleeve and the rubber body 1 (4) can abut against the outer sleeve; the rubber body 2 (5) is connected to the outer sleeve and the core shaft (1) and is staggered with the rubber body 1 (4); the rubber body also includes a protrusion 1 (11) and a protrusion 2 (12) respectively connected to the two axial ends of the outer sleeve.

2. The truck cab elastic bushing according to claim 1, characterized in that: The second rubber body (5) is provided with a spacer (16), the spacer (16) dividing the second rubber body (5) into an inner rubber body (6) and an outer rubber body (7), the inner rubber body (6) being connected between the spacer (16) and the core shaft (1), and the outer rubber body (7) being vulcanized between the outer sleeve and the spacer (16).

3. The truck cab elastic bushing according to claim 2, characterized in that: An abutment protrusion (10) is provided on the inner wall of the outer sleeve near the compensation gap (8), and the rubber body 1 (4) can abut against the abutment protrusion (10).

4. The truck cab elastic bushing according to claim 3, characterized in that: The rubber body 1 (4) is an arc-shaped rubber body structure, and the radial width of the rubber body 1 (4) is smaller than the overall radial width of the abutting protrusion (10) at the corresponding compensation gap (8).

5. The truck cab elastic bushing according to claim 4, characterized in that: The inner rubber body (6) and the outer rubber body (7) are both fan-shaped rubber body structures.

6. The truck cab elastic bushing according to claim 5, characterized in that: The radial width of the inner rubber body (6) is greater than the radial width of the outer rubber body (7), and the radial width of the spacer (16) is greater than the radial width of the inner rubber body (6).

7. The truck cab elastic bushing according to claim 6, characterized in that: The convex part one (11) and the convex part two (12) respectively include a concave section one (13) and a concave section two (14).

8. The truck cab elastic bushing according to claim 7, characterized in that: The outer wall of the outer sleeve is provided with a plurality of weight-reducing grooves (15) which are concave toward one side of the core shaft (1).

9. The truck cab elastic bushing according to claim 8, characterized in that: The axial length of the core shaft (1) is greater than the axial length of the outer sleeve and the rubber body.

10. The truck cab elastic bushing according to any one of claims 3 to 9, characterized in that: The outer sleeve is a two-piece structure, specifically comprising an outer sleeve one (2) and an outer sleeve two (3), and a compensation gap (8) is formed at the connection between the outer sleeve one (2) and the outer sleeve two (3); the rubber body one (4), the rubber body two (5) and the spacer (16) all comprise two groups arranged symmetrically, and the rubber body one (4) and the rubber body two (5) are arranged vertically.

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