CN211082653U

CN211082653U - Anti-drop nylon bushing

Info

Publication number: CN211082653U
Application number: CN201921019233.0U
Authority: CN
Inventors: 张旭阳; 田大维; 王朝; 王金龙; 白克飞; 崔香玉
Original assignee: Nuobo Rubber Production Co Ltd
Current assignee: Nuobo Rubber Production Co Ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-07-24
Anticipated expiration: 2029-07-01

Abstract

The utility model provides an anticreep nylon bush, including the inner tube that has the connecting hole, the cover is located nylon outer tube outside the inner tube, and be located the inner tube with between the nylon outer tube, in order to constitute the inner tube with the elastomer that links firmly between the nylon outer tube, just the one end of nylon outer tube is constructed into radial overhanging turn-ups, for the turn-ups, be constructed with the bulge loop of radial evagination on the periphery wall of the nylon outer tube other end, and in bulge loop department is constructed at least one and runs through the bulge loop reaches the opening that the nylon outer tube set up. Anticreep nylon bush through set up the bulge loop on the outer tube, can promote the pressure of bush to exert oneself through stopping of bulge loop after the bush assembly to through bulge loop department open-ended setting, also can be when the bush assembly, increase the shrinkage factor of outer tube and bulge loop, and then also can reach the effect that reduces outer tube pressure equipment fracture probability.

Description

Anti-drop nylon bushing

Technical Field

The utility model relates to a vehicle parts technical field, in particular to anticreep goes out nylon bush.

Background

The bushing is an indispensable damping part in an automobile, and plays a crucial role in the NVH performance and the handling stability of the whole automobile. With the development of the environmental protection and energy saving concept, the lightweight of the automobile becomes the mainstream trend of the research and development of the majority of automobile manufacturers, and the lightweight design of the bushing is necessary on the basis.

The application of nylon materials in automobile manufacturing is more and more popular, and the use of nylon materials as bushings of bushing outer tube structures is adopted by more and more manufacturers, however, because the nylon materials have the characteristics of high brittleness, easy breakage and the like, when the bushing of the nylon outer tube is used for interference assembly of a whole automobile, the interference is generally large, the nylon outer tube is prone to cracking, and the nylon outer tube is particularly suitable for the nylon outer tube with a thin tube wall. If the assembly interference is reduced for avoiding the cracking of the outer pipe, the pressure output of the bushing is insufficient, and the risk of the bushing falling out is easy to occur.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an anticreep nylon bush to can improve the pressure after the bush assembly and exert oneself, the probability that the outer tube takes place the fracture when also can reducing bush interference fit simultaneously.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides an anticreep nylon bush, includes the inner tube that has the connecting hole, the cover is located the nylon outer tube of inner tube outside, and be located the inner tube with between the nylon outer tube, in order to constitute the inner tube with the elastomer that links firmly between the nylon outer tube, just the one end of nylon outer tube is constructed into radial overhanging turn-ups, for the turn-ups, be constructed with radial evagination bulge loop on the periphery wall of the nylon outer tube other end, and in bulge loop department is constructed at least one and runs through the bulge loop reaches the opening that the nylon outer tube set up.

Further, the height of the convex ring along the radial direction of the nylon outer pipe is between 2mm and 3 mm.

Further, the openings are two which are symmetrically arranged at two opposite sides of the nylon outer tube.

Furthermore, a limiting groove is formed in the inner peripheral wall of the connecting hole.

Furthermore, the limiting grooves are symmetrically arranged relative to the center of the inner pipe.

Further, the inner tube is made of steel or aluminum alloy.

Further, the elastomer is rubber vulcanized and fixedly connected between the inner pipe and the nylon outer pipe.

Furthermore, damping holes arranged along the axial direction of the inner pipe or the nylon outer pipe are constructed in the elastic body, and two ends of each damping hole penetrate through the elastic body.

Furthermore, the damping hole is four along the circumference of elastomer evenly arranges, just in the elastomer, in arbitrary adjacent two all have between the damping hole with constitute the inner tube with the muscle body portion of nylon outer tube connection, and arbitrary adjacent two muscle body portion is followed the inner tube or the axial height of nylon outer tube is not the same.

Furthermore, an avoiding part is formed at the part of the elastic body corresponding to one end of the nylon outer pipe, which is provided with the convex ring.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses an anticreep nylon bush is made by nylon through making outer tubular construction, compares in current steel or aluminum alloy outer tubular construction's bush, can reduce bush weight, does benefit to the lightweight. And through set up the bulge loop on the outer tube, can promote the pressure of bush to exert oneself through blockking of bulge loop after the bush assembly to further setting through bulge loop department open-ended also can be when the bush assembly, the shrinkage factor of increase outer tube and bulge loop, and then also can reach the effect that reduces outer tube pressure equipment fracture probability.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a nylon bush according to an embodiment of the present invention;

fig. 2 is a schematic view illustrating the assembly of a nylon bush according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

description of reference numerals:

1-an inner pipe, 2-a nylon outer pipe, 3-an elastomer, 4-a damping hole, 5-an assembly sleeve and 6-an avoidance part;

101-connecting hole, 102-limiting groove;

201-convex ring, 202-opening, 203-flanging;

301-inner tube connecting part, 302-outer tube connecting part, 3031-first rib part, 3032-second rib part.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to an anti-falling nylon bush which is generally applied to automobiles to realize connection between a frame and a body or between two other members needing shock absorption and vibration isolation. As shown in fig. 1, in overall structure, the anti-falling nylon bushing of the present embodiment mainly includes an inner tube 1 having a connection hole 101, an outer nylon tube 2 sleeved outside the inner tube 1, and an elastic body 3 located between the inner tube 1 and the outer nylon tube 2, and the elastic body 3 is used to constitute a fixed connection between the inner tube 1 and the outer nylon tube 2.

Meanwhile, in the present embodiment, as shown in fig. 2 and fig. 3, one end of the nylon outer tube 2 is configured as a flange 203 extending outward in the radial direction of the nylon outer tube 2 itself, and as one of the main points of the present embodiment, a protruding ring 201 protruding outward in the radial direction of the nylon outer tube 2 is also configured on the outer peripheral wall of the other end of the nylon outer tube 2 relative to the flange 203, and at least one opening 202 penetrating through the protruding ring 201 and the body structure of the nylon outer tube 2 located inside the protruding ring 201 is also configured at the protruding ring 201.

In this embodiment, the flanges 203 formed at both ends of the nylon outer tube 2 and the protruding ring 201 with the opening 202 may be integrally formed with the nylon outer tube 2 when it is manufactured. In addition, in a specific structural arrangement, the height of the convex ring 201 along the radial direction of the nylon outer tube 2 may be between 2mm and 3mm, for example, it may be 2mm, 2.1mm, 2.3mm, 2.5mm, 2.75mm, 2.8mm or 3 mm. In general, the openings 202 provided at the protruding ring 201 can be selected to be two symmetrically arranged at two opposite sides of the nylon outer tube 2. Of course, the number of the openings 202 may be adjusted accordingly according to different design requirements, for example, it may be only one or more than two. And the above design requirement generally refers to the assembly interference between the nylon outer tube 2 and the external member (such as the assembly sleeve 5 mentioned below) for assembling the bushing, in this case, when the assembly interference is large, several more openings 202 may be provided to ensure the shrinkage rate of the nylon outer tube 2, and when the assembly interference is small, the number of openings 202 may be correspondingly reduced.

In addition, the size of the opening 202 itself is generally set according to the shrinkage of the male ring 201 and the nylon outer tube 2 designed during the bushing assembly, the shrinkage can be roughly calculated from the size of the nylon outer tube 2 and the assembly hole (for example, the assembly hole on the assembly sleeve 5) matched with the nylon outer tube, and when the required shrinkage is generally large, the size of the opening 202 is correspondingly large, and when the shrinkage is small, the size of the opening 202 is correspondingly reduced.

Compared with the nylon material adopted by the nylon outer tube 2, the inner tube 1 of the present embodiment is made of steel or aluminum alloy, so as to ensure the structural strength of the inner tube 1 and the connection reliability. When the bush is attached to the external member (for example, a vehicle frame on which the attachment sleeve 5 is provided) and connected to another member (for example, a vehicle body), the bush is generally connected by a bolt connection pair inserted into the connection hole 101 of the inner pipe 1. At this time, in order to prevent the rotation of the connecting bolt in the bolt pair for facilitating the connecting operation, the limiting groove 102 may be formed on the inner circumferential wall of the connecting hole 101 as shown in the figure, and the limiting groove 102 may be provided in plural numbers symmetrically arranged with respect to the center of the inner tube 1. When the connecting bolt is inserted into the bushing, the anti-rotation function can be achieved by clamping the structures, such as the convex plate and the convex block, constructed on the connecting bolt into the limiting groove 102.

In the bushing structure of this embodiment, the elastomer 3 connecting the inner tube 1 and the nylon outer tube 2 generally adopts the rubber vulcanized and fixedly connected between the inner tube 1 and the nylon outer tube 2, which is also a form widely adopted in the existing rubber bushing. In order to improve the use effect of the elastic body 3 made of rubber, the damping holes 4 arranged along the axial direction of the inner tube 1 or the nylon outer tube 2 are also configured in the elastic body 3, and two ends of the damping holes 4 penetrate through the elastic body 3 and are arranged outside the two ends.

Referring to fig. 3 again, as a preferred embodiment, the damping holes 4 in the elastic body 3 are four damping holes uniformly arranged along the circumferential direction of the elastic body 3, and in the elastic body 3, there are rib portions between any two adjacent damping holes 4 to form the connection between the inner tube 1 and the nylon outer tube 2, and at the same time, the heights of any two adjacent rib portions along the axial direction of the inner tube 1 or the nylon outer tube 2 are also set to be unequal.

Specifically, the elastomer 3 made of rubber of this embodiment includes an inner portion connected to the inner tube 1, an outer portion connected to the nylon outer tube 2, and a middle portion connecting the inner portion and the outer portion, and the middle portion has a smaller height along the axial direction of the inner tube 1 or the nylon outer tube 2 than the inner and outer portions, so that the middle portion is in a state of both ends being recessed.

For convenience of description, an inner portion connected to the inner pipe 1 is referred to as an inner pipe connecting portion 301, an outer portion connected to the nylon outer pipe 2 is referred to as an outer pipe connecting portion 302, and a middle portion between the inner and outer portions is a rib portion as described above.

Each rib part is separated by the damping hole 4, and the heights of the adjacent rib parts are different, namely, as shown in fig. 3, the heights H1 and H2 of the two rib parts are different. For convenience of description, two rib portions with different heights may be respectively referred to as a first rib portion 3031 and a second rib portion 3032, and referring to the arrangement of the heights between the rib portions as shown in fig. 2, based on the arrangement of the heights between the rib portions as described above, for the elastic body 3 in the bushing of the present embodiment, if two dotted lines orthogonal to each other in fig. 2 are taken as two-dimensional coordinate axes, the heights of the rib portions in the upper left region and the lower right region are the same, and the heights of the rib portions in the lower left region and the upper right region are the same. Therefore, through the arrangement of the rib parts in the elastic body 3, the rigidity of the bushing in different dimensions can be different, so that the application requirement of the bushing on an automobile can be met.

In this embodiment, in order to further ensure the shrinkage of the protruding ring 201 and the nylon outer tube 2 at the position thereof, as shown in fig. 3, an escape portion 6 is also formed at a portion of the elastic body 3 corresponding to the end of the nylon outer tube 2 having the protruding ring 201. The escape portion 6 is located on the outer side portion of the elastic body 3 connected to the nylon outer tube 2, that is, the outer side end surface of the outer tube connecting portion 301, and as a possible form, it may be designed as a groove having a triangular cross section in fig. 3. When the nylon outer pipe 2 and the convex ring 201 contract, the avoiding part 6 of the groove structure provides a space for the contraction, so that the contraction is facilitated.

In the assembly of the nylon bushing of this embodiment, taking the assembly on an assembly sleeve 5 as an example, and as shown in fig. 2 and fig. 3, after the inner tube 1 and the nylon outer tube 2 are fixedly connected to form a bushing structure through the elastic body 3, the bushing is press-fitted into the assembly hole on the assembly sleeve 5 by interference through the end having the convex ring 201. At the initial stage of press fitting, the convex ring 201 is in contact with the assembling sleeve 5, and the convex ring 201 and the nylon outer pipe 2 shrink due to pressure bearing, so that the pressing-in of the bushing is facilitated. After the press fitting is finished, the convex ring 201 extends out from the other end of the assembling hole, at the moment, the convex ring 201 and the nylon outer pipe 2 are contracted and recovered, and the bushing can be well positioned on the assembling sleeve 5 through the turned-over edges 203 and the convex rings 201 at the two ends of the nylon outer pipe 2.

The bushing structure of the embodiment can reduce the weight of the bushing compared with the existing bushing of the steel or aluminum alloy outer pipe structure by making the outer pipe structure of the bushing structure of nylon, thereby being beneficial to light weight. Simultaneously, through set up bulge loop 201 on nylon outer tube 2, can promote the pressure output of bush through the stopping of bulge loop 201 after the bush assembly to further setting through bulge loop 201 department opening 202 can also be when the bush assembly, increase nylon outer tube 2 and bulge loop 201's shrinkage factor, also can reduce nylon outer tube 2 pressure equipment fracture probability with this, and have fine effect.

Through actual production verification, when the lining of the embodiment is adopted for connecting and assembling the frame and the vehicle body, the nylon outer pipe 2 is not cracked again after being pressed and the pressing force of the lining after being assembled is improved by about 30 percent compared with the prior art, and the excellent performance of the anti-stripping nylon lining of the embodiment is seen.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an anticreep nylon bush which characterized in that: including inner tube (1) that has connecting hole (101), the cover is located nylon outer tube (2) outside inner tube (1), and be located inner tube (1) with between nylon outer tube (2) in order to constitute inner tube (1) with elastomer (3) that link firmly between nylon outer tube (2), just the one end of nylon outer tube (2) is constructed into radial overhanging turn-ups (203), for turn-ups (203), be constructed radial evagination bulge loop (201) on the periphery wall of nylon outer tube (2) other end, and in bulge loop (201) department is constructed at least one and is run through bulge loop (201) and opening (202) that nylon outer tube (2) set up.

2. The anti-walkout nylon bushing of claim 1, wherein: the height of the convex ring (201) along the radial direction of the nylon outer pipe (2) is between 2mm and 3 mm.

3. The anti-walkout nylon bushing of claim 1, wherein: the openings (202) are symmetrically arranged on two opposite sides of the nylon outer tube (2).

4. The anti-walkout nylon bushing of claim 1, wherein: the inner peripheral wall of the connecting hole (101) is provided with a limiting groove (102).

5. The anti-walkout nylon bushing of claim 4, wherein: the limiting grooves (102) are arranged symmetrically relative to the center of the inner pipe (1).

6. The anti-walkout nylon bushing of claim 1, wherein: the inner tube (1) is made of steel or aluminum alloy.

7. The anti-walkout nylon bushing of any one of claims 1 to 6, wherein: the elastomer (3) is rubber which is vulcanized and fixedly connected between the inner pipe (1) and the nylon outer pipe (2).

8. The anti-walkout nylon bushing of claim 7, wherein: damping holes (4) arranged along the axial direction of the inner pipe (1) or the nylon outer pipe (2) are constructed in the elastic body (3), and two ends of each damping hole (4) penetrate through the elastic body (3).

9. The anti-walkout nylon bushing of claim 8, wherein: the damping hole (4) are along four that the circumference of elastomer (3) was evenly arranged, just in elastomer (3), in arbitrary adjacent two all have between damping hole (4) in order to constitute inner tube (1) with the muscle somatic part that nylon outer tube (2) is connected, and arbitrary adjacent two muscle somatic part is followed inner tube (1) or nylon outer tube (2) axial highly is not equal.

10. The anti-walkout nylon bushing of claim 7, wherein: an avoiding part (6) is formed at the part of the elastic body (3) corresponding to one end of the nylon outer pipe (2) with the convex ring (201).