CN219035405U - Bushing - Google Patents

Abstract

The utility model discloses a bushing, which comprises an inner pipe, an outer pipe and a vibration damping piece arranged between the inner pipe and the outer pipe, wherein the vibration damping piece comprises an elastic connecting piece for connecting the inner pipe and the outer pipe, the elastic connecting piece is provided with a first connecting part connected with the inner pipe, a second connecting part connected with the outer pipe and a bending part arranged between the first connecting part and the second connecting part, projections of the first connecting part and the second connecting part in the radial direction of the inner pipe are at least partially overlapped, and the bending direction of the bending part is in the circumferential direction of the inner pipe. So set up, on the one hand, can make the elastic connection spare realizes shearing direction atress when inner tube and outer tube take place radial displacement each other to reduce the bush in its radial direction's rigidity, improve its on radial direction's damping effect, on the other hand, can guarantee again the elastic connection spare realizes the compression direction atress when inner tube and outer tube take place radial displacement each other, guarantees its good durability.

Description

Bushing

[ field of technology ]

The utility model relates to a bushing, in particular to a bushing which can be used for vibration reduction of an automobile air conditioner compressor.

[ background Art ]

With the continuous development of society, vehicles are an indispensable part of people's life as vehicles, and common vehicles are cars, trucks, buses, and the like. In order to satisfy different functions, vehicles are often equipped with a plurality of vibration systems, such as a fuel engine or an electric motor for providing power, an air-conditioning compressor for compressing driving refrigerant, etc., which generate great vibrations during operation, and seriously affect the riding experience of a rider. In addition, when the vehicle encounters some uneven road conditions, the vehicle can shake, and the riding experience of a rider can be affected. For this reason, many devices for damping vibration have been developed, one of which is a bushing.

Taking vibration reduction of the air conditioner compressor as an example, the installation form of the air conditioner compressor in an automobile is divided into an integrated type and an independent type, wherein the bushing of the integrated type air conditioner compressor is generally high in rigidity and mainly plays a role of fixing, vibration isolation of the bushing is mainly supported on a power assembly or a motor suspension, and vibration of the independent type air conditioner compressor is transmitted to an automobile body through the bushing of the compressor, so that the bushing of the independent type air conditioner compressor is high in rigidity requirement, and good vibration isolation effect of the bushing is guaranteed. Fig. 1 provides a conventional bushing 100, which includes an inner tube 101, an outer tube 102, and a vibration damping member 103 disposed between the inner tube 101 and the outer tube 102, wherein the vibration damping member 103 extends between the inner tube 101 and the outer tube 102 along a circumferential direction of the inner tube 101 to form a solid structure, and when the vibration damping member 103 is stressed, the vibration damping member 103 is compressed in a radial direction and sheared in an axial direction, so that the radial rigidity of the vibration damping member 103 is high, deformation is not easy to occur, and the vibration damping effect of the bushing 100 in the radial direction is poor.

Therefore, a new technical solution is desired to solve the above technical problems.

[ utility model ]

The technical problems to be solved by the utility model are as follows: a bushing is provided which has excellent vibration damping effects in both the axial and radial directions.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a bush, its includes inner tube, outer tube and lie in the inner tube with damping spare between the outer tube, damping spare is including connecting the inner tube with the elastic connection spare of outer tube, the elastic connection spare have with the first connecting portion that the inner tube links to each other, with the second connecting portion that the outer tube links to each other and lie in first connecting portion with the kink between the second connecting portion, first connecting portion with the second connecting portion is in following at least partial overlapping of projection in the radial direction of inner tube, the direction of buckling of kink is followed the circumferencial direction of inner tube.

In a preferred embodiment, the elastic connection member is formed with only one bending portion, and the bending portion is formed with an included angle.

In a preferred embodiment, the included angle is greater than or equal to 90 degrees and less than 180 degrees.

In a preferred embodiment, the elastic connection member includes a first connection section connected to the inner tube and a second connection section connected to the outer tube, a portion of the first connection section connected to the inner tube forming the first connection portion, a portion of the second connection section connected to the outer tube forming the second connection portion, and a region of the first connection section and the second connection section connected to each other and to each other forming the bending portion.

In a preferred embodiment, a first direction and a second direction are defined which are mutually intersected, wherein the first direction and the second direction are perpendicular to the axial direction of the inner tube, the first connecting section extends along the first direction, and the second connecting section extends along the second direction.

In a preferred embodiment, the first and second connection sections are equal in length in the axial direction of the inner tube and the surfaces of both ends are flush.

In a preferred embodiment, two symmetry axes perpendicular to each other are defined, the two symmetry axes are perpendicular to the axial direction of the inner tube, the vibration absorbing member includes four elastic connecting members arranged at intervals along the circumferential direction of the inner tube, and the four elastic connecting members are arranged in an axisymmetric manner with respect to the two symmetry axes.

In a preferred embodiment, the vibration absorbing member includes four elastic connecting members arranged at intervals along the circumferential direction of the inner tube, and the bending directions of the bending portions of any adjacent two elastic connecting members are opposite.

In a preferred embodiment, the inner tube has an outer surface and the outer tube has an inner surface, the damping member comprises an annular inner elastic sleeve connected to the outer surface and an annular outer elastic sleeve connected to the inner surface, the first connecting section is directly connected to the inner elastic sleeve, and the second connecting section is directly connected to the outer elastic sleeve.

In a preferred embodiment, the vibration damper includes at least two elastic connectors and an elastic protrusion located between two adjacent elastic connectors, the elastic protrusion being connected to one of the inner tube and the outer tube with a clearance formed therebetween.

Compared with the prior art, the utility model has the following beneficial effects: through setting up first connecting portion and second connecting portion as along the radial direction's of inner tube projection at least partially overlap, and the direction of buckling of kink is along the circumference direction of inner tube, on the one hand, can make the elastic connection piece realize shearing direction atress when inner tube and outer tube take place radial displacement each other to reduce bush in its radial direction's rigidity, improve its on radial direction's damping effect, on the other hand, can guarantee again that the elastic connection piece realizes compression direction atress when inner tube and outer tube take place radial displacement each other, guarantee its good durability.

[ description of the drawings ]

Fig. 1 is a cross-sectional view of a prior art bushing.

Fig. 2 is a perspective view of a bushing according to a preferred embodiment of the present utility model.

Fig. 3 is a top view of the bushing of fig. 2.

Fig. 4 is an exploded perspective view of the bushing of fig. 2.

Fig. 5 is a top view of a bushing according to another preferred embodiment of the utility model.

[ detailed description ] of the utility model

The technical solutions of the embodiments of the present utility model will be explained and illustrated below with reference to the drawings of the embodiments of the present utility model, but the following embodiments are only preferred embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, other embodiments that may be obtained by those skilled in the art without making any inventive effort are within the scope of the present utility model.

Referring to FIG. 2, the present utility model provides a bushing 200 that may be used, but is not limited to, for vibration damping of an automotive air conditioning compressor. The bushing 200 includes an inner tube 1, an outer tube 2, and a vibration damper 3 between the inner tube 1 and the outer tube 2. The inner tube 1 and the outer tube 2 may be manufactured from a metallic material or plastic. The vibration damper 3 may be vulcanization molded between the inner tube 1 and the outer tube 2 from a rubber material.

Referring to fig. 3 and 4, the vibration damper 3 includes an elastic connection member 31 connecting the inner tube 1 and the outer tube 2. The elastic connection member 31 has a first connection portion 311 connected to the inner tube 1, a second connection portion 312 connected to the outer tube 2, and a bent portion 313 located between the first connection portion 311 and the second connection portion 312. The projections of the first connection portion 311 and the second connection portion 312 in the radial direction of the inner tube 1 at least partially overlap, and the bending direction of the bending portion 313 is along the circumferential direction of the inner tube 1. By means of the arrangement, on one hand, the elastic connecting piece 31 can realize shearing direction stress when the inner tube 1 and the outer tube 2 are mutually radially displaced, so that rigidity of the bushing 200 in the radial direction is reduced, vibration reduction effect of the bushing in the radial direction is improved, and on the other hand, the elastic connecting piece 31 can realize compression direction stress when the inner tube 1 and the outer tube 2 are mutually radially displaced, and good durability of the elastic connecting piece is guaranteed.

With continued reference to fig. 3 and 4, the elastic connecting member 31 is formed with only one bending portion 313, and the bending portion 313 is formed with an included angle θ. The included angle theta is more than or equal to 90 degrees and less than 180 degrees. The elastic connection member 31 includes a first connection section 314 connected to the inner tube 1 and a second connection section 315 connected to the outer tube 2, a portion of the first connection section 314 connected to the inner tube 1 forms the first connection portion 311, a portion of the second connection section 315 connected to the outer tube 2 forms the second connection portion 312, and a region where the first connection section 314 and the second connection section 315 are connected to each other and connected to each other forms the bending portion 313. A first direction F1 and a second direction F2 intersecting each other are defined, the first direction F1 and the second direction F2 are perpendicular to the axial direction of the inner tube 1, the first connecting section 314 extends along the first direction F1, and the second connecting section 315 extends along the second direction F2. The first connecting section 314 and the second connecting section 315 are equal in length in the axial direction of the inner tube 1 and have both end surfaces flush.

With continued reference to fig. 3 and 4, the vibration damping member 3 includes four elastic connection members 31 arranged at intervals in the circumferential direction of the inner tube 1. In the preferred embodiment, two symmetrical axes O1 and O2 perpendicular to each other are defined, the two symmetrical axes O1 and O2 are perpendicular to the axial direction of the inner tube 1, and the four elastic connectors 31 are axially symmetrically arranged relative to the two symmetrical axes O1 and O2, so that on one hand, the stress of each elastic connector 31 is uniform, and better durability performance is achieved; on the other hand, the mutual interference between the elastic connection members 31 is made small, so that the inner tube 1 and the outer tube 2 can be ensured to satisfy the requirement of low rigidity in a larger stroke. Typically, after loading, one of the two symmetry axes O1, O2 extends in the front-rear direction and the other extends in the left-right direction. In a preferred embodiment, the bending directions of the bending portions 313 of any two adjacent elastic connectors 31 are opposite. Of course, in other embodiments, the number and arrangement of the elastic connection members 31 may be determined according to actual needs.

With continued reference to fig. 3 and 4, the inner tube 1 has an outer surface 10 and the outer tube 2 has an inner surface 20. The damping member 3 comprises an annular inner elastic sleeve 32 connected to the outer surface 10 and an annular outer elastic sleeve 33 connected to the inner surface 20. The first connection portion 311 is directly connected to the inner elastic sleeve 32, and is further connected to the inner tube 1 through the inner elastic sleeve 32. The second connection 312 is directly connected to the outer elastic sleeve 33 and is further connected to the outer tube 2 via the outer elastic sleeve 33. The inner elastic sleeve 32 and the outer elastic sleeve 33 are used to increase the connection force between the elastic connection 31 and the inner tube 1 and the outer tube 2, respectively.

With continued reference to fig. 3 and 4, the vibration damper 3 further includes an elastic protrusion 34 located between two adjacent elastic connectors 31, where the elastic protrusion 34 is connected to one of the inner tube 1 and the outer tube 2, and a movable gap 340 is formed between the other elastic protrusion and the other elastic protrusion 340, and the elastic protrusion 340 is used to prevent excessive displacement between the inner tube 1 and the outer tube 2, so that the bushing 200 can still ensure excellent durability performance under the condition of realizing low radial stiffness. Of course, in other embodiments, the resilient protrusions 340, such as the bushing 300 shown in fig. 5, may be omitted as the case may be.

It will be appreciated that the above embodiments of the utility model can be combined with each other to obtain further embodiments without conflict. The individual technical features described in the above embodiments may be combined in any suitable manner without contradiction.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Claims (10)

1. A bushing comprising an inner tube, an outer tube and a damping member located between the inner tube and the outer tube, the damping member comprising an elastic connection member connecting the inner tube and the outer tube, characterized in that: the elastic connecting piece is provided with a first connecting part connected with the inner pipe, a second connecting part connected with the outer pipe and a bending part positioned between the first connecting part and the second connecting part, the projections of the first connecting part and the second connecting part along the radial direction of the inner pipe are at least partially overlapped, and the bending direction of the bending part is along the circumferential direction of the inner pipe.

2. The bushing as defined in claim 1 wherein: the elastic connecting piece is only provided with one bending part, and the bending part is provided with an included angle.

3. A bushing as claimed in claim 2, wherein: the included angle is more than or equal to 90 degrees and less than 180 degrees.

4. A bushing as claimed in claim 2, wherein: the elastic connecting piece comprises a first connecting section connected with the inner pipe and a second connecting section connected with the outer pipe, the first connecting section and the part connected with the inner pipe form a first connecting part, the second connecting section and the part connected with the outer pipe form a second connecting part, and the first connecting section and the second connecting section are mutually connected and connected with each other to form a bending part.

5. The bushing as defined in claim 4 wherein: a first direction and a second direction which are mutually intersected are defined, the first direction and the second direction are perpendicular to the axial direction of the inner tube, the first connecting section extends along the first direction, and the second connecting section extends along the second direction.

6. The bushing as defined in claim 4 wherein: the first connecting section and the second connecting section are equal in length along the axial direction of the inner tube and the surfaces of the two ends are flush.

7. A bushing as claimed in claim 2, wherein: two symmetrical shafts perpendicular to each other are defined, the two symmetrical shafts are perpendicular to the axial direction of the inner tube, the vibration reduction piece comprises four elastic connecting pieces which are arranged at intervals along the circumferential direction of the inner tube, and the four elastic connecting pieces are arranged in an axisymmetrical manner relative to the two symmetrical shafts.

8. A bushing as claimed in claim 2, wherein: the vibration reduction piece comprises four elastic connecting pieces which are arranged at intervals along the circumferential direction of the inner tube, and the bending directions of the bending parts of any two adjacent elastic connecting pieces are opposite.

9. A bushing as claimed in any one of claims 1 to 8 wherein: the inner tube has an outer surface, the outer tube has an inner surface, the vibration damping member includes an annular inner elastic sleeve connected with the outer surface and an annular outer elastic sleeve connected with the inner surface, the first connecting portion is directly connected with the inner elastic sleeve, and the second connecting portion is directly connected with the outer elastic sleeve.

10. A bushing as claimed in any one of claims 1 to 8 wherein: the vibration damper comprises at least two elastic connecting pieces and elastic protruding parts located between two adjacent elastic connecting pieces, wherein the elastic protruding parts are connected with one of the inner tube and the outer tube, and a movable gap is formed between the elastic protruding parts and the other of the inner tube and the outer tube.

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