Rubber main spring assembly and automobile left suspension assembly

Abstract

The invention provides a rubber main spring assembly and an automobile left suspension assembly, and relates to the technical field of automobile parts, the rubber main spring assembly comprises an outer pipe, an inner pipe, a rubber main spring and a top spring steel plate, and the inner pipe is located in the outer pipe; the rubber main spring is arranged on the inner wall of the outer pipe and comprises a top limiting rubber block and a supporting rubber block, the top limiting rubber block is located above the inner pipe, and the supporting rubber block is fixedly connected with the inner pipe; the top spring steel plate is arranged in the top limiting rubber block, the lower surface of the top spring steel plate faces the inner pipe, and the two ends of the top spring steel plate are fixedly connected with the outer pipe. The top spring steel plate is arranged in the top limiting rubber block, so that the rigidity of the top limiting rubber block is improved, the load resistance of the top limiting rubber block is higher, and the top spring steel plate and the top limiting rubber block act together to buffer the impact force of the corbel; and the problem of brittle failure caused by excessive impact between the corbel and the top of the welding ring during strenuous movement is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to a rubber main spring component and an automobile left suspension assembly. Background Art

[0002] In the prior art, for a vehicle powertrain that adopts a three-point suspension arrangement, when the powertrain is horizontally arranged, the left suspension is usually arranged at the gearbox (motor reducer) housing end, the right suspension is arranged at the engine end, and the rear suspension is arranged near the differential housing. The left suspension assembly includes a bracket body, a rubber main spring, and a support arm. The rubber main spring is embedded in the bracket body through the outer ring, and the support arm is embedded in the inner ring of the rubber main spring, thereby forming a left suspension assembly. The support arm of the left suspension assembly is connected to the gearbox (motor reducer) housing, and the bracket body is connected to the vehicle body end; when the powertrain is excited to move, the left suspension assembly can limit the displacement of the powertrain and attenuate the vibration transmission of the powertrain due to the presence of the rubber main spring.

[0003] Considering the cost and cabin layout space, the powertrain is usually fixed with as few suspension components as possible. Whether it is a traditional fuel vehicle or an extended-range or hybrid vehicle, a three-point suspension becomes the preferred powertrain suspension solution, so that the three suspensions bear the excitation of the powertrain end respectively. Large excitation sometimes causes the rubber of the main spring to stretch and squeeze in multiple directions, usually to limit the displacement; the left suspension rubber main spring will be designed with upper and lower limit and left limit structures, the right suspension hydraulic main spring will be designed with upper and lower limit and right limit structures, and the rear suspension rubber main spring will be designed with front and rear limit structures. These limit structures mainly limit the displacement in the main direction. However, the limit structure of the pure rubber main spring still cannot take into account the problem of limiting the displacement in the composite direction and vibration attenuation, and sometimes the support arm will break. After analysis and verification, it was found that the left support arm broke because the composite movement of the left suspension rubber main spring upward and backward at the same time caused the support arm to collide with the bracket body with the powertrain movement excitation, and the support arm was brittlely broken by the impact.

[0004] Therefore, a new structure is needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a rubber main spring assembly and a left suspension assembly of an automobile to solve the problems existing in the prior art. By arranging a top spring steel plate in a top limiting rubber block, the rigidity of the top limiting rubber block is improved while retaining the flexible vibration reduction function of the top limiting rubber. In addition, the top spring steel plate and the top limiting rubber block work together to buffer the impact force of the support arm, thereby avoiding the problem of brittle fracture caused by excessive impact between the support arm and the top of the welding ring during violent movement.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A rubber main spring assembly comprises an outer tube, an inner tube, a rubber main spring and a top spring steel plate, wherein the inner tube is located inside the outer tube and is used to connect a support arm; the rubber main spring is arranged on the inner wall of the outer tube, and the rubber main spring comprises a top limiting rubber block and a supporting rubber block, wherein the top rubber block is located above the inner tube and the supporting rubber block is fixedly connected to the inner tube; there is a movable gap between the top rubber block and the inner tube for the movement of the inner tube; the top spring steel plate is arranged in the top limiting rubber block, the lower surface of the top spring steel plate faces the inner tube, and both ends of the top spring steel plate are fixedly connected to the outer tube.

[0008] As an implementation manner, the radial cross-sectional shape of the top spring steel plate is adapted to the bottom contour shape of the top limiting rubber block.

[0009] As an implementation manner, both ends of the top spring steel plate are welded to the outer tube.

[0010] As one embodiment, the rubber main spring also includes a bottom limiting rubber block, a bottom spring steel plate is arranged inside the bottom limiting rubber block, and the upper surface of the top spring steel plate faces the inner tube; there is a movable gap between the bottom limiting rubber block and the inner tube for the movement of the inner tube; the two ends of the bottom spring steel plate are fixedly connected to the outer tube.

[0011] As an implementation manner, the radial cross-sectional shape of the bottom spring steel plate is adapted to the top contour shape of the bottom limiting rubber block.

[0012] As an implementation manner, both ends of the bottom spring steel plate are welded to the outer tube.

[0013] As one embodiment, the rubber main spring also includes a side limiting rubber block. In the circumferential direction, the two ends of the side limiting rubber are respectively connected to the end of the top limiting rubber block and the bottom end of the supporting rubber block; there is a movable gap between the side limiting rubber block and the inner tube for the movement of the inner tube.

[0014] As an implementation manner, the rubber main spring further includes a rubber layer applied on the surface of the outer tube.

[0015] The present invention also provides a left suspension assembly of an automobile, comprising a bracket body, a rubber main spring assembly as described above, and a support arm, wherein the bracket body is used to be connected to the vehicle body, and the bracket body comprises a welding ring; an outer tube in the rubber main spring assembly is embedded in the welding ring; one end of the support arm is used to connect to a gearbox housing, and the other end of the support arm is plugged and fixed to the inner tube.

[0016] As an implementation manner, the outer tube and the welding ring are interference fit.

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] The present invention arranges a top spring steel plate in the top limiting rubber block, thereby retaining the flexible vibration reduction function of the top limiting rubber and improving the rigidity of the top limiting rubber block, so that the load resistance of the top limiting rubber block is stronger, and the top spring steel plate and the top limiting rubber block work together to buffer the impact force of the support arm, thereby avoiding the problem of brittle fracture caused by excessive impact with the top of the welding ring during violent movement of the support arm.

[0019] Other technical solutions of the present invention also have the following technical effects:

[0020] The present invention can avoid the problem of brittle fracture caused by severe collision between the support arm and the bottom of the outer tube by arranging a bottom spring steel plate in the bottom limiting rubber block. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic diagram of the overall structure of the left suspension assembly in one embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the structure of a bracket body in one embodiment of the present invention;

[0024] Figure 3 This is a schematic structural diagram of a rubber main spring assembly in one embodiment of the present invention;

[0025] Figure 4 This is a schematic structural diagram of a support arm in one embodiment of the present invention;

[0026] Figure 5 A schematic diagram of a radial cross-sectional structure of a rubber main spring assembly in one embodiment of the present invention;

[0027] Description of reference numerals:

[0028] 1. Bracket body; 2. Rubber main spring assembly; 3. Support arm; 4. Movable gap; 21. Outer tube; 22. Inner tube; 23. Top limit rubber block; 24. Top spring steel plate; 25. Bottom limit rubber block; 26. Bottom spring steel plate; 27. Side limit rubber block; 28. Rubber layer. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The purpose of the present invention is to provide a rubber main spring assembly and a left suspension assembly of an automobile to solve the problems existing in the prior art. By arranging a top spring steel plate in a top limiting rubber block, the rigidity of the top limiting rubber block is improved while retaining the flexible vibration reduction function of the top limiting rubber. In addition, the top spring steel plate and the top limiting rubber block work together to buffer the impact force of the support arm, thereby avoiding the problem of brittle fracture caused by excessive impact between the support arm and the top of the welding ring during violent movement.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Embodiment 1:

[0033] like Figure 1 to Figure 5 As shown, this embodiment provides a rubber main spring assembly 2, including an outer tube 21, an inner tube 22, a rubber main spring and a top spring steel plate 24. Among them, the inner tube 22 is located inside the outer tube 21, and the inner tube 22 is used to connect the support arm 3; the rubber main spring is arranged on the inner wall of the outer tube 21, and the rubber main spring includes a top limiting rubber block 23 and a supporting rubber block, the top rubber block is located above the inner tube 22, and the supporting rubber block is fixedly connected to the inner tube 22, and is used to support the inner tube 22 and suppress the main movement trend of the inner tube 22. In this embodiment, there are two supporting rubber blocks, and they are symmetrical with respect to the center plane of the outer tube 21. There is a movable gap 4 in the rubber main spring for the movement of the inner tube 22. The top spring steel plate 24 is arranged in the top limiting rubber block 23, the lower surface of the top spring steel plate 24 faces the inner tube 22, and the two ends of the top spring steel plate 24 are fixedly connected to the outer tube 21. Specifically, the center line of the top spring steel plate 24 may be parallel to the center axis of the outer tube 21 , and the center plane of the top spring steel plate 24 may be coplanar with the center plane of the outer tube 21 .

[0034] The inventor found that the support arm 3 would break due to impact during the whole vehicle verification process, but through 28 working conditions and bracket strength analysis, it was found that there was no problem with the strength of the support arm 3. After motion envelope verification and real vehicle dynamic tracking, it was found that the support arm 3 collided with the welding ring of the bracket body 1 during the braking process, so that the support arm 3 broke brittlely. In this embodiment, by setting a top spring steel plate 24 in the top limit rubber block 23, the rigidity of the top limit rubber block 23 is improved while retaining the flexible vibration reduction function of the top limit rubber, so that the load resistance of the top limit rubber block 23 is stronger, and the top spring steel plate 24 and the top limit rubber block 23 work together to buffer the impact force of the support arm 3, avoiding the problem of brittle fracture caused by excessive impact with the top of the welding ring (or the outer tube 21) during violent movement. In addition, the method of setting a top spring steel plate 24 in the top limit rubber block 23 is lower in cost than changing the material of the support arm 3.

[0035] In this embodiment, the thickness of the top spring steel plate 24 can be designed according to actual conditions, and the axial length is equal to that of the outer tube 21 , and the width is as equal to or close to the width of the collision surface of the inner tube 22 with the top limiting rubber block 23 as possible.

[0036] As an embodiment, the radial cross-sectional shape of the top spring steel plate 24 is adapted to the bottom contour shape of the top stop rubber block 23. For example, the two ends of the bottom plane of the top stop rubber block 23 usually have a certain curvature, and the two ends of the top spring steel plate 24 also have a certain curvature.

[0037] As one embodiment, both ends of the top spring steel plate 24 are welded to the outer tube 21 .

[0038] As an embodiment, the rubber main spring further includes a bottom limiting rubber block 25, a bottom spring steel plate 26 is arranged inside the bottom limiting rubber block 25, the upper surface of the bottom spring steel plate 26 faces the inner tube 22, and the two ends of the bottom spring steel plate 26 are fixedly connected to the outer tube 21. Although the impact force between the support arm 3 and the top limiting rubber block 23 is relatively large, the movement trend of the support arm 3 in the outer tube 21 is mainly up and down movement. Therefore, this embodiment improves the buffering capacity of the support arm 3 when it moves downward by arranging the bottom spring steel plate 26 in the bottom limiting rubber block 25, so as to avoid the support arm 3 from violently colliding with the bottom of the outer tube 21 and causing brittle fracture.

[0039] As an implementation manner, the radial cross-sectional shape of the bottom spring steel plate 26 is adapted to the top contour shape of the bottom limiting rubber block 25 .

[0040] As one embodiment, both ends of the bottom spring steel plate 26 are welded to the outer tube 21 .

[0041] In order to improve the all-round cushioning of the support arm 3, the rubber main spring in this embodiment also includes a side limiting rubber block 27. In the circumferential direction, the two ends of the side limiting rubber are respectively connected to the end of the top limiting rubber block 23 and the bottom end of the supporting rubber block.

[0042] As an embodiment, the rubber main spring further includes a rubber layer 28 laid on the surface of the outer tube 21 , and there is a movable gap 4 between the rubber layer 28 and the top limiting rubber block 23 , the bottom limiting rubber block 25 and the side limiting rubber block 27 .

[0043] Embodiment 2:

[0044] like Figure 1 to Figure 5 As shown, this embodiment provides a left suspension assembly of an automobile, including a bracket body 1, a rubber main spring assembly 2 as described above, and a support arm 3. The bracket body 1 is used to connect with the vehicle body, and the bracket body 1 includes a welding ring; the outer tube 21 in the rubber main spring assembly 2 is embedded in the welding ring; one end of the support arm 3 is used to connect to the gearbox housing, and the other end of the support arm 3 is plugged and fixed to the inner tube 22.

[0045] As one embodiment, the outer tube 21 is interference fit with the welding ring.

[0046] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A rubber main spring assembly, characterized in that: include: External pipe; An inner tube, the inner tube is located inside the outer tube, and the inner tube is used to connect the bracket arm; A rubber main spring, the rubber main spring is arranged on the inner wall of the outer tube, the rubber main spring comprises a top limiting rubber block and a supporting rubber block, the top rubber block is located above the inner tube, the supporting rubber block is fixedly connected to the inner tube; there is a movable gap between the top rubber block and the inner tube for the inner tube to move; And a top spring steel plate, wherein the top spring steel plate is arranged in the top limiting rubber block, the lower surface of the top spring steel plate faces the inner tube, and the two ends of the top spring steel plate are fixedly connected to the outer tube.

2. The rubber main spring assembly according to claim 1, characterized in that: The radial cross-sectional shape of the top spring steel plate is adapted to the bottom contour shape of the top limiting rubber block.

3. The rubber main spring assembly according to claim 1, characterized in that: Both ends of the top spring steel plate are welded to the outer tube.

4. The rubber main spring assembly according to any one of claims 1 to 3, characterized in that: The rubber main spring also includes a bottom limiting rubber block, a bottom spring steel plate is arranged inside the bottom limiting rubber block, and the upper surface of the top spring steel plate faces the inner tube; there is a movable gap between the bottom limiting rubber block and the inner tube for the movement of the inner tube; the two ends of the bottom spring steel plate are fixedly connected to the outer tube.

5. The rubber main spring assembly according to claim 4, characterized in that: The radial cross-sectional shape of the bottom spring steel plate is adapted to the top contour shape of the bottom limiting rubber block.

6. The rubber main spring assembly according to claim 4, characterized in that: Both ends of the bottom spring steel plate are welded to the outer tube.

7. The rubber main spring assembly according to claim 4, characterized in that: The rubber main spring also includes a side limiting rubber block. In the circumferential direction, the two ends of the side limiting rubber are respectively connected to the end of the top limiting rubber block and the bottom end of the supporting rubber block; there is a movable gap between the side limiting rubber block and the inner tube for the movement of the inner tube.

8. The rubber main spring assembly according to claim 7, characterized in that: The rubber main spring also includes a rubber layer laid on the surface of the outer tube.

9. A left suspension assembly of an automobile, characterized in that: include: A bracket body, the bracket body is used to connect with the vehicle body, and the bracket body includes a welding ring; The rubber main spring assembly according to any one of claims 1 to 8, wherein the outer tube of the rubber main spring assembly is embedded in the welding ring; And a supporting arm, one end of which is used to connect with the gearbox housing, and the other end of which is plugged and fixed with the inner tube.

10. The left suspension assembly of an automobile according to claim 9, characterized in that: The outer tube is interference fit with the welding ring.

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