CN219076935U - Rear axle bushing with vibration isolation improvement function - Google Patents

Abstract

The utility model discloses a rear axle bushing for improving vibration isolation, which comprises a bushing body for connecting a rear axle with a frame, wherein the bushing body comprises two inner sleeves, an outer sleeve and two rubber bodies, the two inner sleeves are coaxially arranged, annular flanging which is bent outwards is arranged at both ends of the outer sleeve, the two rubber bodies are respectively and correspondingly integrally formed between the two inner sleeves and the outer sleeve through vulcanization, and the annular flanging at both ends axially and correspondingly limit the two rubber bodies. The rear axle bushing adopts a split structure, when the load of the rear axle bushing is large, the deformation quantity of the rubber body along the axial direction can be limited, the axial rigidity is improved, the service life is ensured, the vibration isolation effect of the rear axle bushing with the existing integral structure is improved, and the abnormal sound is prevented.

Description

Rear axle bushing with vibration isolation improvement function

Technical Field

The utility model relates to the technical field of automobile parts, in particular to a rear axle bushing for improving vibration isolation.

Background

As one of common automobile parts, a rear axle bushing is generally used for flexibly connecting a rear axle and a frame, a buffer effect is generated between the rear axle and the frame, and the problem of poor vibration isolation effect caused by rigid connection of the rear axle and the frame is avoided, so that the NVH effect of the whole automobile is improved, and meanwhile, the fatigue resistance of the whole automobile is improved through the buffer characteristic of the NVH effect.

At present, the rear axle bush generally comprises an inner sleeve, an outer sleeve and rubber bodies which are integrally formed between the inner sleeve and the outer sleeve through vulcanization, the whole rear axle bush is of an integral structure, and the inner sleeve and the outer sleeve are of straight cylindrical structures.

In the in-service use, because the rubber body is not effectively limited along the axial direction, when the axial load of the rear axle bushing is large, large deformation can be generated along the axial direction, the number of times and the frequency of stretching the rubber body along the axial direction are increased along the time, and then cracking is generated, the service life is influenced, the vibration isolation effect is not only influenced, but also friction is generated at the cracking position due to the out-of-step expansion, and abnormal sound is generated.

Disclosure of Invention

The utility model aims to overcome the defects and the shortcomings of the prior art, and provides a rear axle bushing with improved vibration isolation.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an improve rear axle bush of vibration isolation, is including the bush body that is used for connecting rear axle and frame, its characterized in that: the bushing body comprises two inner sleeves, an outer sleeve and two rubber bodies, wherein the two inner sleeves are coaxially arranged, annular flanging which is bent outwards is arranged at two ends of the outer sleeve, the two rubber bodies are respectively and integrally formed between the two inner sleeves and the outer sleeve through vulcanization, and the annular flanging at two ends axially and respectively correspond to the two rubber bodies for limiting.

Further, the outer part of the outer sleeve is sleeved with a reinforcing sleeve.

Further, the inner edges of the outer end surfaces of the two rubber bodies are respectively provided with a first annular groove, and the outer edges of the outer end surfaces of the two rubber bodies are respectively provided with a protrusion and a groove which are distributed alternately in sequence.

Further, the inner end surfaces of the two rubber bodies are respectively provided with a second annular groove.

Further, one ends of the two inner sleeves are attached to each other.

Compared with the prior art, the utility model has the beneficial effects that:

the rear axle bushing adopts a split structure, namely, the rear axle bushing comprises two inner sleeves, an outer sleeve and two rubber bodies which are coaxially arranged, wherein the two rubber bodies are respectively and correspondingly integrally formed between the two inner sleeves and the outer sleeve through vulcanization, so that two relatively independent vibration isolation units are formed; simultaneously, the both ends of outer sleeve all have the annular turn-ups of outwards bending, can carry out spacingly to two rubber bodies along the axial respectively, when the axial load of rear axle bush is great, can restrict the deformation volume that the rubber body produced along the axial, promoted axial rigidity, guaranteed life, improved the vibration isolation effect of the rear axle bush of current integral structure, prevented the production of abnormal sound.

Drawings

Fig. 1 is a top view of the structure of the present utility model.

Fig. 2 is a cross-sectional view of the structure A-A of fig. 1.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 2, a rear axle bushing for improving vibration isolation comprises a bushing body 1 for connecting a rear axle with a frame, wherein the bushing body 1 comprises two inner sleeves 2 and 3, an outer sleeve 4 and two rubber bodies 5 and 6, the two inner sleeves 2 and 3 are coaxially arranged, annular flanges 7 which are bent outwards are arranged at two ends of the outer sleeve 4, the two rubber bodies 5 and 6 are respectively and correspondingly integrally formed between the two inner sleeves 2 and 3 and the outer sleeve 4 through vulcanization, and the annular flanges 7 at two ends are respectively and axially limited to the two rubber bodies 5 and 6.

In the present utility model, the outer sleeve 4 is externally fitted with a reinforcing sleeve 8.

It should be noted that, because both ends of the outer sleeve 4 have annular flanges 7 that bend outwards, in order to facilitate the processing (bending) of the outer sleeve 4, the thickness of the outer sleeve 4 is thinner, which results in that the strength of the outer sleeve 4 is often lower, when the axial load of the bushing body 1 is larger, the outer sleeve 4 with lower strength obviously cannot meet the actual use requirement, and after the outer sleeve 4 is sleeved with the reinforcing sleeve 8 with thicker and higher strength, the problem of insufficient strength of the outer sleeve 4 can be obviously improved.

In the utility model, the inner edges of the outer end surfaces of the two rubber bodies 5 and 6 are respectively provided with a first annular groove 9, and the outer edges of the outer end surfaces of the two rubber bodies 5 and 6 are respectively provided with a bulge 10 and a groove 11 which are sequentially and alternately distributed.

In the utility model, the inner end surfaces of the two rubber bodies 5 and 6 are respectively provided with a second annular groove 12.

Therefore, the first annular grooves 9 are formed in the inner edges of the outer end faces of the two rubber bodies 5 and 6, and the second annular grooves 12 are formed in the inner end faces of the two rubber bodies 5 and 6, so that on one hand, when radial loads are born, the rubber bodies can be prevented from protruding outwards due to radial extrusion, and abrasion is avoided. On the other hand, when the lining body 1 is pressed into the reinforcing sleeve 8, the lining body can be adaptively compressed, so that the assembly is convenient; after the bushing body 1 is pressed into the reinforcing sleeve 8, the bushing body can be adaptively stretched, and the bushing body is tightly stretched from the inner side to be tightly attached to the reinforcing sleeve 8.

In addition, the outer edges of the outer end surfaces of the two rubber bodies 5 and 6 are respectively provided with the protrusions 10 and the grooves 11 which are alternately distributed in turn, so that the bushing body 1 can adapt to torsion possibly occurring in the working process.

In the utility model, one ends of the two inner sleeves 2 and 3 are attached to each other, so that the processing is convenient.

The utility model is further described below with reference to the accompanying drawings:

during molding, the two rubber bodies 5 and 6 are respectively and correspondingly integrally molded between the two inner sleeves 2 and 3 and the outer sleeve 4 through vulcanization, and the bushing body 1 is molded. And then the lining body 1 is pressed into the reinforcing sleeve 8 to complete the assembly, thus forming the rear axle lining.

When the vibration isolator works, as the two rubber bodies 5 and 6 are respectively and correspondingly integrally formed between the two inner sleeves 2 and 3 and the outer sleeve 4 through vulcanization, two relatively independent vibration isolation units are formed; simultaneously, the both ends of outer sleeve 4 all have the annular turn-ups 7 of outwards bending, can carry out spacing (prevent excessive compression and tensile of two rubber bodies 5, 6) to two rubber bodies 5, 6 along the axial respectively, consequently, when the axial load of rear axle bush is great, can restrict the deformation volume that the rubber body produced along the axial, promoted axial rigidity to this can guarantee life, improve the vibration isolation effect of the rear axle bush of current monolithic structure, and can prevent the production of abnormal response.

Although the present disclosure describes embodiments, not every embodiment is described in terms of a single embodiment, and such description is for clarity only, and one skilled in the art will recognize that the embodiments described in the disclosure as a whole may be combined appropriately to form other embodiments that will be apparent to those skilled in the art.

Therefore, the above description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (5)

1. The utility model provides an improve rear axle bush of vibration isolation, is including the bush body that is used for connecting rear axle and frame, its characterized in that: the bushing body comprises two inner sleeves, an outer sleeve and two rubber bodies, wherein the two inner sleeves are coaxially arranged, annular flanging which is bent outwards is arranged at two ends of the outer sleeve, the two rubber bodies are respectively and integrally formed between the two inner sleeves and the outer sleeve through vulcanization, and the annular flanging at two ends axially and respectively correspond to the two rubber bodies for limiting.

2. A rear axle bushing for improved vibration isolation as defined in claim 1, wherein: the outer part of the outer sleeve is sleeved with a reinforcing sleeve.

3. A rear axle bushing for improved vibration isolation as defined in claim 1, wherein: the inner edges of the outer end surfaces of the two rubber bodies are respectively provided with a first annular groove, and the outer edges of the outer end surfaces of the two rubber bodies are respectively provided with a bulge and a groove which are distributed alternately in sequence.

4. A rear axle bushing for improved vibration isolation as defined in claim 3, wherein: the inner end surfaces of the two rubber bodies are respectively provided with a second annular groove.

5. A rear axle bushing for improved vibration isolation as defined in claim 1, wherein: one ends of the two inner sleeves are attached.

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