CN216331270U

CN216331270U - Bush and suspension structure of vehicle

Info

Publication number: CN216331270U
Application number: CN202122547076.4U
Authority: CN
Inventors: 张海莉; 庄英武; 谢涛
Original assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Current assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-04-19
Anticipated expiration: 2031-10-21

Abstract

The utility model discloses a bushing and a suspension structure of a vehicle, wherein the bushing comprises an outer pipe, an inner pipe, a first elastic member, a second elastic member and a third elastic member, the outer pipe surrounds the inner pipe, the outer pipe is connected with the inner pipe through the first elastic member, the second elastic member is at least partially positioned between the outer pipe and the inner pipe, the second elastic member and the third elastic member are both connected with at least one of the outer pipe and the inner pipe, the first elastic member and the third elastic member are distributed in the circumferential direction of the outer pipe, the first elastic member and the second elastic member are distributed in the axial direction of the outer pipe, and the hardness of the first elastic member, the hardness of the second elastic member and the hardness of the third elastic member are respectively unequal. This embodiment can solve the problem that the stiffness adjustment range of the bush is small.

Description

Bush and suspension structure of vehicle

Technical Field

The utility model relates to the technical field of traffic equipment, in particular to a bushing and a suspension structure of a vehicle.

Background

Bushings are relatively common components in vehicles, which allow a resilient connection between different components, for example, in a chassis suspension system of a vehicle, a trailing arm may be connected to the body or frame via a bushing. The structure of the bushing affects the stability, comfort and NVH performance of the vehicle, and therefore the structural design of the bushing is very important for improving various performances of the vehicle.

The conventional bushing mainly includes an inner tube, an outer tube, and an elastic member, the elastic member is usually a rubber member, the outer tube is sleeved outside the inner tube, and the inner tube and the outer tube can be connected through the elastic member, for example, the outer tube can be connected with the inner tube through the elastic member made of rubber material by a vulcanization process.

However, the elastic member is a component made of a single material, and the rigidity of the elastic member is a fixed value, so that the rigidity of the bushing in different directions tends to be consistent, the rigidity adjustment range of the bushing is small, and the performance targets in different directions cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a bushing and a suspension structure of a vehicle, and aims to solve the problem that the rigidity adjustment range of a traditional bushing is small.

In order to solve the problems, the utility model adopts the following technical scheme:

in a first aspect, the present invention discloses a bushing, which includes an outer tube, an inner tube, a first elastic member, a second elastic member, and a third elastic member, wherein the outer tube surrounds the inner tube, the outer tube is connected to the inner tube through the first elastic member, the second elastic member is at least partially located between the outer tube and the inner tube, and both the second elastic member and the third elastic member are connected to at least one of the outer tube and the inner tube, the first elastic member and the third elastic member are arranged in a circumferential direction of the outer tube, the first elastic member and the second elastic member are arranged in an axial direction of the outer tube, and a hardness of the first elastic member, a hardness of the second elastic member, and a hardness of the third elastic member are different from each other.

In a second aspect, the present invention discloses a suspension structure of a vehicle, including the above bushing.

The technical scheme adopted by the utility model can achieve the following beneficial effects:

the bushing disclosed by the utility model comprises a first elastic part, a second elastic part and a third elastic part, wherein the first elastic part and the third elastic part are distributed in the circumferential direction of an outer pipe, the first elastic part and the second elastic part are distributed in the axial direction of the outer pipe, and the hardness of the first elastic part, the hardness of the second elastic part and the hardness of the third elastic part are respectively unequal, so that the bushing has different rigidities in different directions, the rigidity adjusting range of the bushing is larger, the damping characteristic of the bushing is adjusted in a larger range, the rigidity decoupling in different directions is realized to the greatest extent, and the performance targets in different directions are better met.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic view of a bushing according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of a bushing according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second elastic member according to an embodiment of the disclosure;

FIG. 4 is a schematic structural diagram of an outer tube disclosed in the embodiments of the present invention;

FIG. 5 is a schematic structural diagram of an inner tube according to an embodiment of the present invention;

FIG. 6 is a schematic layout of a first elastic member according to an embodiment of the disclosure;

fig. 7 is a schematic arrangement diagram of a third elastic member according to an embodiment of the disclosure.

Description of reference numerals:

100-outer tube, 110-inner circumferential surface, 120-end surface;

200-inner tube, 210-outer peripheral surface;

300-a first resilient member, 310-a first end, 320-a second end;

400-a second elastic element, 410-a plate body, 411-a through hole, 420-a bulge and 421-an arc surface;

500-a third elastic member, 510-a third end, 520-a fourth end;

600-accommodating the tank.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 7, an embodiment of the present invention discloses a bushing, which includes an outer tube 100, an inner tube 200, a first elastic member 300, a second elastic member 400, and a third elastic member 500. The outer pipe 100 surrounds the inner pipe 200, that is, the outer pipe 100 is sleeved outside the inner pipe 200, both the outer pipe 100 and the inner pipe 200 can be set to be circular pipes, and the inner diameter, the outer diameter, the length and other dimensions of the outer pipe 100 and the inner pipe 200 can be flexibly selected. The outer pipe 100 is connected to the inner pipe 200 by the first elastic member 300, and optionally, the outer pipe 100 may be integrally connected to the inner pipe 200 by the first elastic member 300 by a vulcanization process or the like. The second elastic member 400 is at least partially located between the outer tube 100 and the inner tube 200, and the second elastic member 400 and the third elastic member 500 are both connected to at least one of the outer tube 100 and the inner tube 200, that is: the second elastic member 400 may be directly connected to only the outer tube 100 by means of bonding, etc., may be directly connected to only the inner tube 200 by means of bonding, etc., and may be directly connected to both the outer tube 100 and the inner tube 200 by means of bonding, etc.; the third elastic member 500 may be directly connected to only the outer tube 100 by means of bonding or the like, may be directly connected to only the inner tube 200 by means of bonding or the like, or may be directly connected to both the outer tube 100 and the inner tube 200 by means of bonding or the like.

The first elastic member 300, the second elastic member 400 and the third elastic member 500 are connected to at least one of the outer tube 100 and the inner tube 200, and there are portions between the outer tube 100 and the inner tube 200, so that the rigidity of the bushing is affected by the hardness of the three. Optionally, the first elastic member 300 and the second elastic member 400 are arranged in the axial direction of the outer tube 100 (i.e., the Z direction in fig. 1), the first elastic member 300 and the third elastic member 500 are arranged in the circumferential direction of the outer tube 100, and the hardness of the first elastic member 300, the hardness of the second elastic member 400, and the hardness of the third elastic member 500 are respectively unequal, so that the bushing has different rigidities in different directions, and the stiffness adjustment range of the bushing is wider, so that the damping characteristic of the bushing is adjusted in a wider range, thereby maximally achieving stiffness decoupling in different directions and better meeting performance targets in different directions.

Alternatively, the first elastic member 300, the second elastic member 400, and the third elastic member 500 may each be a rubber member. In addition, the first elastic element 300 has higher hardness, so that the requirement of high rigidity of the bushing in the Y direction is met, and the supporting and limiting effects are better exerted; the third elastic member 500 has a low stiffness to satisfy the low stiffness requirement of the bushing in the X-direction, thereby better absorbing impact and damping vibration.

The number of the first elastic member 300 and the third elastic member 500 may be one, or the number of the first elastic member 300 and the third elastic member 500 may be at least two, in which case the first elastic member 300 and the third elastic member 500 are alternately arranged in the circumferential direction of the outer tube 100. In contrast, when the number of the first elastic members 300 and the third elastic members 500 is increased, the rigidity of the bushing can be designed differently in more directions, so that the rigidity adjustment range of the bushing is expanded. Further optionally, the number of the first elastic members 300 and the number of the third elastic members 500 are two, wherein the two first elastic members 300 are arranged in the X direction shown in fig. 1, and the two third elastic members 500 are arranged in the Y direction shown in fig. 1, in this embodiment, the number of the first elastic members 300 and the number of the third elastic members 500 are not large or small, which not only expands the stiffness adjustment range of the bushing, but also ensures the assembly efficiency of the bushing.

The first end 310 of the first elastic member 300 and the third end 510 of the third elastic member 500 are disposed on the same side, and the second end 320 of the first elastic member 300 and the fourth end 520 of the third elastic member 500 are disposed on the same side, where the first end 310 and the second end 320 are two ends of the first elastic member 300 along the axial direction of the outer tube 100, and the third end 510 and the fourth end 520 are two ends of the third elastic member 500 along the axial direction of the outer tube 100. The second elastic member 400 may be disposed on the side where the first end 310 and the third end 510 are located, at this time, the first end 310 and the third end 510 may be flush, the second elastic member 400 may be disposed only corresponding to the first end 310, or disposed corresponding to the first end 310 and the third end 510, so that a gap may be left between the outer tube 100 and the inner tube 200, which is not beneficial to the stable operation of the bushing. To solve this problem, in an alternative embodiment, the outer tube 100 has an inner circumferential surface 110 facing the inner tube 200, the inner tube 200 has an outer circumferential surface 210 facing the outer tube 100, the first end 310 is recessed with respect to the third end 510, such that the inner circumferential surface 110, the outer circumferential surface 210, the first end 310 and side surfaces of two third elastic members 500 adjacent thereto (i.e., side surfaces of two third elastic members 500 adjacent to the first end 310) together define a receiving groove 600, and the second elastic members 400 are at least partially located in the receiving groove 600. This embodiment may fill the gap between the outer tube 100 and the inner tube 200 as much as possible by the first elastic member 300, the second elastic member 400, and the third elastic member 500, so as to facilitate the stable operation of the bushing.

The second end 320 of the first elastic member 300 and the fourth end 520 of the third elastic member 500 may not be flush, but such an arrangement tends to leave a gap between the outer pipe 100 and the inner pipe 200, which is not favorable for stable operation of the bushing. In view of this, the second end 320 of the first elastic element 300 and the fourth end 520 of the third elastic element 500 can be flush, so as to fill the gap between the outer pipe 100 and the inner pipe 200 as much as possible, thereby facilitating the stable operation of the bushing. Further, the second end 320 and the fourth end 520 may not be provided with the second elastic member 400 at the side, i.e. both the second end 320 and the fourth end 520 are flush with the end of the outer tube 100 facing away from the second elastic member 400. Since the second elastic member 400 is disposed at the side of the first end 310 and the third end 510 to satisfy the stiffness adjustment requirement of the bushing, the second elastic member 400 is not required to be disposed at the side of the second end 320 and the fourth end 520, and thus the structure of the bushing can be simplified.

The second elastic member 400 may have a block structure, which is partially disposed corresponding to the bushing. However, in order to increase the stiffness adjustment range of the bushing, the second elastic member 400 may include a plate body 410 and a protrusion 420, wherein the plate body 410 is attached to the end surface 120 of the outer tube 100, and the protrusion 420 is disposed on a surface of the plate body 410 facing the outer tube 100. Since the plate body 410 and the protruding portion 420 are both of an elastic structure, the plate body and the protruding portion can simultaneously exert an elastic buffering function, and the arrangement positions of the plate body and the protruding portion are different, so that the rigidity adjustment range of the bushing is expanded. Alternatively, the second elastic member 400 may be an integral structure, the hardness of the plate body 410 and the hardness of the protrusion 420 may be equal or unequal, and when the hardness of the plate body 410 and the hardness of the protrusion 420 are unequal, the stiffness adjustment range of the bushing is wider.

The plate body 410 is provided with a through hole 411 for the inner tube 200 to pass through, the protrusion 420 has an arc surface 421 facing the center line of the through hole 411, the hole wall of the through hole 411 and the arc surface 421 are located in the same circumferential plane, in other words, the hole wall of the through hole 411 and the center line of the arc surface 421 are collinear, and the radial dimensions of the two are equal, so that the hole wall of the through hole 411 is aligned with the arc surface 421. This embodiment makes the protrusion 420 as close as possible to the inner tube 200, thereby making full use of the space between the outer tube 100 and the inner tube 200 to provide a sufficiently large protrusion 420, and further improving the cushioning effect of the bushing. In addition, the arrangement can simplify the processing process of the second elastic member 400.

In order to adjust the rigidity of the bush in more directions, the number of the convex portions 420 may be set to at least two, and the convex portions 420 and the third elastic members 500 are alternately arranged in the circumferential direction of the outer tube 100. Accordingly, the receiving groove 600 described above is also provided in plural, and each protrusion 420 is provided corresponding to each receiving groove 600.

The first elastic member 300 has a first arc length along the circumferential direction of the outer tube 100, the second elastic member 400 has a second arc length along the circumferential direction of the outer tube 100, and the third elastic member 500 has a third arc length along the circumferential direction of the outer tube 100, wherein the first arc length is not equal to the third arc length. Since the arc length affects the size of each elastic member, the stiffness of each elastic member is changed, and when the first arc length is not equal to the third arc length, the range of the difference between the stiffness of the first elastic member 300 and the stiffness of the third elastic member 500 is larger, so that the stiffness of the bushing can be changed in a wider range. The second arc length of the second elastic member 400 can be flexibly selected, for example, the second arc length can be equal to the first arc length, so that the space between the outer tube 100 and the inner tube 200 can be fully utilized to arrange the second elastic member 400 with a sufficient size.

Alternatively, the first elastic member 300 and the second elastic member 400 may be in direct contact, the first elastic member 300 and the third elastic member 500 may be in direct contact, and the second elastic member 400 and the third elastic member 500 may be in direct contact. Therefore, in other embodiments, a first gap is formed between the first elastic member 300 and the second elastic member 400; and/or a second gap is formed between the first elastic member 300 and the third elastic member 500; and/or a third gap is formed between the second elastic member 400 and the third elastic member 500. The first gap, the second gap and the third gap form a larger space between the elastic pieces, so that the elastic pieces are favorably deformed, and the buffering effect of the bushing is improved. Alternatively, the shapes of the first gap, the second gap and the third gap in the cross section perpendicular to the axis of the outer tube 100 may be flexibly selected, for example, they may be triangular, trapezoidal, rectangular, etc., and the embodiment of the present invention is not limited thereto.

In an alternative embodiment, the second elastic member 400 is detachably connected to at least one of the outer tube 100 and the inner tube 200. Compared with the case that the second elastic member 400 is connected with the outer pipe 100 and/or the inner pipe 200 in a non-detachable manner, when the second elastic member 400 is connected with at least one of the outer pipe 100 and the inner pipe 200 in a detachable manner, the second elastic member 400 is easier to replace, so that different second elastic members 400 can be selected according to different scenes, and the matching degree of the bush and the working condition of the vehicle is improved; meanwhile, such an arrangement is also advantageous for replacing the damaged second elastic member 400. Alternatively, when the receiving groove 600 is formed between the outer tube 100 and the inner tube 200, the second elastic member 400 may be engaged with the receiving groove 600, for example, may be engaged with the receiving groove 600 by a clearance fit, a transition fit or an interference fit, and this connection does not require an additional connecting member, so that the assembling process of the bushing may be simplified.

Based on the bushing disclosed in the above embodiments, an embodiment of the present invention further discloses a suspension structure of a vehicle, which includes the bushing disclosed in any of the above embodiments.

In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A bushing, characterized by comprising an outer tube (100), an inner tube (200), a first elastic member (300), a second elastic member (400), and a third elastic member (500), the outer tube (100) surrounding the inner tube (200), the outer tube (100) being connected to the inner tube (200) by the first elastic member (300), the second elastic member (400) being at least partially located between the outer tube (100) and the inner tube (200), and the second elastic member (400) and the third elastic member (500) each being connected to at least one of the outer tube (100) and the inner tube (200), the first elastic member (300) and the third elastic member (500) being arranged in a circumferential direction of the outer tube (100), the first elastic member (300) and the second elastic member (400) being arranged in an axial direction of the outer tube (100), and the hardness of the first elastic member (300), the hardness of the second elastic member (400), and the hardness of the third elastic member (500) are not equal to each other.

2. The bushing of claim 1, wherein the number of the first elastic members (300) and the third elastic members (500) is at least two, the first elastic members (300) and the third elastic members (500) are alternately arranged in the circumferential direction of the outer tube (100), the outer tube (100) has an inner circumferential surface (110) facing the inner tube (200), the inner tube (200) has an outer circumferential surface (210) facing the outer tube (100), the first end (310) of the first elastic member (300) and the third end (510) of the third elastic member (500) are disposed on the same side, the first end (310) is recessed relative to the third end (510), and the inner circumferential surface (110), the outer circumferential surface (210), the first end (310) and the side surfaces of two adjacent third elastic members (500) together enclose a receiving groove (600), the second elastic piece (400) is at least partially positioned in the accommodating groove (600).

3. The bushing of claim 2, wherein the second end (320) of the first elastic element (300) and the fourth end (520) of the third elastic element (500) are arranged on the same side, and wherein the second end (320) and the fourth end (520) are flush with an end of the outer tube (100) facing away from the second elastic element (400).

4. The bushing of claim 2, wherein the second elastic member (400) comprises a plate body (410) and a protrusion (420), the plate body (410) is attached to the end surface (120) of the outer tube (100), and the protrusion (420) is disposed on a surface of the plate body (410) facing the outer tube (100).

5. The bushing according to claim 4, wherein said plate body (410) is provided with a through hole (411) for passing said inner tube (200), said protrusion (420) having an arc surface (421) facing the centerline of said through hole (411), the wall of said through hole (411) and said arc surface (421) being located in the same circumferential plane.

6. The bushing according to claim 4, wherein the number of the protrusions (420) is at least two, and the protrusions (420) and the third elastic members (500) are alternately arranged in a circumferential direction of the outer tube (100).

7. The bushing of claim 1, wherein the first resilient member (300) has a first arc length along a circumferential direction of the outer tube (100), and the third resilient member (500) has a third arc length along the circumferential direction of the outer tube (100), the first arc length being different from the third arc length.

8. The bushing of claim 1, wherein there is a first gap between the first resilient member (300) and the second resilient member (400); and/or a second gap is arranged between the first elastic piece (300) and the third elastic piece (500); and/or a third gap is arranged between the second elastic part (400) and the third elastic part (500).

9. The bushing of claim 1, wherein said second resilient member (400) is removably connected to at least one of said outer tube (100) and said inner tube (200).

10. A suspension structure of a vehicle, characterized by comprising the bushing of any one of claims 1 to 9.