CN112112962A

CN112112962A - Connecting structure of aluminum alloy shifting fork shaft and bushing

Info

Publication number: CN112112962A
Application number: CN202011006894.7A
Authority: CN
Inventors: 王红涛; 赵书杰; 易伟; 高正林; 刘杨
Original assignee: SUZHOU DONGFENG FINEBLANKING ENGINEERING CO LTD
Current assignee: SUZHOU DONGFENG FINEBLANKING ENGINEERING CO LTD
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2020-12-22

Abstract

The invention provides a connecting structure of an aluminum alloy declutch shift shaft and a bush, which comprises: the shifting fork shaft and the bushing assembled on the shifting fork shaft; the fork shaft includes: the fork shaft comprises a fork shaft body and fork legs formed on two sides of the fork shaft body, bushings are sleeved on shaft heads at two ends of the fork shaft body, and anti-falling grooves are formed in the shaft heads at the two ends respectively; the bush includes: an integrally formed bushing body; the bush body is axially arranged in a through mode, the bush body is a hollow cylinder, a boss structure is formed on the inner side face of one end of the bush body, and the boss structure is assembled in the anti-falling groove. In the connecting structure, the bushing is formed by injection molding independently and can be assembled on the shifting fork shaft, so that batch and rapid production can be realized. Meanwhile, the lining sleeve is provided with a glue inlet channel design, and the material can flow conveniently in a molding mode. In addition, the bushing is provided with a boss structure, so that the bushing can be prevented from being separated from the shifting fork shaft after being assembled, and the bushing is provided with an opening, so that the assembly between the bushing and the shifting fork shaft is facilitated.

Description

Connecting structure of aluminum alloy shifting fork shaft and bushing

Technical Field

The invention relates to the technical field of shifting fork shafts, in particular to a connecting structure of an aluminum alloy shifting fork shaft and a lining.

Background

DCT gearboxes are important components in automobiles, which are used as mechanisms for changing the rotational speed and torque from the engine and are capable of changing the output and input shaft gear ratios, either fixed or in steps. At present, DCT gearbox parts comprise a shifting fork, and a shaft head supporting structure in the shifting fork is an important part influencing the performance of the shifting fork shaft. However, the spindle nose bearing structure of current declutch shift shaft is mostly the package structure of moulding, through injection moulding process with friction material and declutch shift shaft injection moulding promptly, however the declutch shift shaft production efficiency of above-mentioned structure is low, and the package mould the structure damage after, can lead to scrapping of whole declutch shift shaft. Therefore, it is necessary to provide a further solution to the above problems.

Disclosure of Invention

The invention aims to provide a connecting structure of an aluminum alloy shifting fork shaft and a bush, which overcomes the defects in the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a connecting structure of an aluminum alloy declutch shift shaft and a bush, comprising: the shifting fork shaft and the bushing assembled on the shifting fork shaft;

the shift fork shaft includes: the fork shaft comprises a fork shaft body and fork legs formed on two sides of the fork shaft body, wherein the bushings are sleeved on shaft heads at two ends of the fork shaft body, and anti-falling grooves are respectively formed in the shaft heads at the two ends; the bushing includes: an integrally formed bushing body; the bush comprises a bush body, and is characterized in that the bush body is axially arranged in a through mode, the bush body is a hollow cylinder, a boss structure is formed on the inner side face of one end of the bush body, the boss structure is assembled in the anti-falling groove, and an anti-falling face abutted against the anti-falling groove is formed on one axial side face of the boss structure.

As an improvement of the connecting structure of the invention, the end part of the fork foot is also provided with a protective sleeve.

As an improvement of the connecting structure of the invention, the bushing body is integrally formed in an injection molding mode.

As an improvement of the connecting structure, the outer circumferential arc-shaped surface of the bushing body is concavely provided with a glue inlet channel, and the glue inlet channels respectively extend to two ends of the bushing body along the axial direction.

As an improvement of the connecting structure, the boss structure is circumferentially and continuously arranged along the inner side surface of the end.

As an improvement of the connecting structure, a guide surface is formed between the other axial side surface of the boss structure and the end surface of the end where the boss structure is located, and the end surface of the end where the boss structure is located forms a supporting surface.

As an improvement of the coupling structure of the present invention, the guide surface is a guide slope surface provided obliquely in the fitting direction of the bush.

As an improvement of the connection structure of the present invention, an opening is further formed on the bushing body in the axial direction, both ends of the opening extend to the end portions of the bushing body, respectively, and the inside of the bushing body communicates with the outside through the opening.

As an improvement of the connecting structure, the bushing body is integrally formed in an injection molding mode, the peripheral arc-shaped surface of the bushing body is concavely provided with a glue inlet channel, and the glue inlet channel is arranged opposite to the opening.

As an improvement of the connection structure of the present invention, the opening is a slit opening axially opened in the bushing body.

Compared with the prior art, the invention has the beneficial effects that: in the connecting structure of the aluminum alloy shifting fork shaft and the bush, the bush is independently molded by injection and can be assembled on the shifting fork shaft, so that the mass and rapid production can be realized, and the production efficiency is greatly improved. Meanwhile, the bushing is provided with a glue inlet channel, so that the material can flow conveniently in a molding mode, and meanwhile, the glue collecting points cannot be raised to influence the product performance. In addition, the bushing is provided with a boss structure, so that the bushing can be prevented from being separated from the shifting fork shaft after being assembled, and the bushing is provided with an opening, so that the assembly between the bushing and the shifting fork shaft is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of an embodiment of a connection structure of an aluminum alloy fork shaft and a bush according to the present invention;

FIG. 2 is an axial sectional view of the aluminum alloy shift fork shaft-bush coupling structure of FIG. 1;

FIG. 3 is an enlarged perspective view of the bushing of FIG. 1;

fig. 4 is an axial cross-section of the bushing of fig. 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

As shown in fig. 1 to 4, an embodiment of the present invention provides a connection structure of an aluminum alloy fork shaft 200 and a bushing 100, which includes: a fork shaft 200 and a bush 100 fitted on the fork shaft 200.

Wherein, the fork shaft 200 includes: the fork shaft comprises a fork shaft body 21 and fork legs 22 formed on two sides of the fork shaft body 21, anti-falling grooves are respectively formed in shaft heads at two ends of the fork shaft body 21, and in order to protect the fork legs 22, protective sleeves 23 are further mounted at the end parts of the fork legs 22.

The bush 100 suit is on the spindle nose at shift fork axle body 21 both ends, and it includes: an integrally formed bushing body 10.

The bushing body 10 is axially disposed through, and the bushing body 10 is a hollow cylinder. So, this bush body 10 wall thickness keeps even unanimous, and current bush structure is the combination form of arc surface and plane, and the inhomogeneous bush structure of this kind of structure wall thickness leads to the poor scheduling problem of injection molding material surface quality easily, and the design of this embodiment hollow cylinder is favorable to avoiding this type of problem to take place, improves product property ability greatly.

By adopting the integrally formed bushing body 10, the bushing can be assembled on the shifting fork shaft, so that the independent batch production of the connecting structure is realized, and the production efficiency is greatly improved. In one embodiment, the bushing body 10 is integrally formed by injection molding. At this moment, in order to facilitate the realization of injection molding, the peripheral arc-shaped surface of the bushing body 10 is provided with the glue inlet channel 11 in a concave manner, and the glue inlet channel 11 extends to the two ends of the bushing body 10 along the axial direction. Wherein, the glue inlet channel 11 is an arc-shaped channel with a bottom surface suitable for flowing. Compared with the existing bushing structure in the form of combining the arc surface and the plane, the plastic openings of the injection molding part are distributed on the plane, so that the bulge is easy to influence the function of the product; the glue inlet channel 11 of the embodiment is formed on the peripheral arc-shaped surface, so that the arc surface cannot be protruded, and the product quality is improved.

In order to facilitate the assembly between the bushing and the shifting fork shaft, a boss structure 12 is formed on the inner side surface of one end of the bushing body 10, and the boss structure 12 is assembled in the anti-falling groove. The axial side of boss structure 12 forms anticreep face 121, and through setting up above-mentioned boss structure 12 like this, when bush body 10 assembles on the declutch shift shaft, this boss structure 12 can block in the anticreep groove to the declutch shift shaft to lean on with the anticreep groove counterbalance through anticreep face 121, take place to deviate from in order to prevent connection structure in the use. In one embodiment, the boss structure 12 is circumferentially continuous along the inner side of the end.

Meanwhile, a guide surface 122 is formed between the other axial side surface of the boss structure 12 and the end surface of the end where the boss structure is located, and the guide surface 122 facilitates press-fitting between the bushing and the shift fork shaft. In one embodiment, the guiding surface 122 is a guiding inclined surface that is obliquely arranged along the assembling direction of the connecting structure. Meanwhile, the end face of the end where the boss structure 12 is located forms a support face 123 to serve as an axial force bearing support face during the movement process.

In order to facilitate the assembly between the bushing and the fork shaft, the bushing body 10 is further formed with an opening 13 along the axial direction, and in one embodiment, the opening 13 is a long and narrow opening 13 axially opened on the bushing body 10.

This opening 13 allows a slight deformation of the bushing body 10 during assembly to compensate for dimensional tolerances with the fork shaft. Wherein both ends of the opening 13 are extended to the ends of the bushing body 10, respectively, and the inside of the bushing body 10 is communicated with the outside through the opening 13. In addition, in order to reduce the deformation stress of the bushing body 10 during assembly, the glue inlet channel 11 is arranged opposite to the opening 13, so that the bushing bodies 10 on both sides of the opening 13 can be separated more easily due to the design of the glue inlet channel 11, so that the bushing bodies 10 can be assembled on the shaft head of the shifting fork shaft smoothly.

In conclusion, in the connecting structure of the aluminum alloy shifting fork shaft and the bushing, the bushing is independently injection-molded and can be assembled on the shifting fork shaft, so that the mass and rapid production can be realized, and the production efficiency is greatly improved. Meanwhile, the bushing is provided with a glue inlet channel, so that the material can flow conveniently in a molding mode, and meanwhile, the glue collecting points cannot be raised to influence the product performance. In addition, the bushing is provided with a boss structure, so that the bushing can be prevented from being separated from the shifting fork shaft after being assembled, and the bushing is provided with an opening, so that the assembly between the bushing and the shifting fork shaft is facilitated.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a connection structure of aluminum alloy declutch shift shaft and bush which characterized in that, connection structure includes: the shifting fork shaft and the bushing assembled on the shifting fork shaft;

2. The aluminum alloy declutch shift shaft and bushing connection structure according to claim 1, wherein a protective sleeve is further mounted on the end of the fork leg.

3. The aluminum alloy fork shaft and bushing connection structure according to claim 1, wherein the bushing body is integrally formed by injection molding.

4. The aluminum alloy declutch shift shaft and bushing connection structure according to claim 2, wherein the outer circumferential arc surface of the bushing body is provided with a recessed glue inlet channel, and the glue inlet channels extend to two ends of the bushing body along the axial direction.

5. The aluminum alloy fork shaft and bushing connection structure according to claim 1, wherein the boss structure is provided continuously in a circumferential direction along the inner side surface of the end.

6. The aluminum alloy fork shaft and bushing connection structure according to claim 1, wherein a guide surface is formed between the other axial side surface of the boss structure and the end surface of the end where the boss structure is located, and the end surface of the end where the boss structure is located forms a support surface.

7. The aluminum alloy fork shaft/bush connection structure according to claim 6, wherein the guide surface is a guide slope surface provided obliquely in the fitting direction of the bush.

8. The aluminum alloy fork shaft and bush connection structure according to claim 1, wherein the bush body is further formed with an opening in an axial direction, both ends of the opening extend to ends of the bush body, respectively, and an inside of the bush body communicates with an outside through the opening.

9. The aluminum alloy declutch shift shaft and bushing connection structure according to claim 8, wherein the bushing body is integrally formed by injection molding, a rubber inlet channel is concavely arranged on the peripheral arc-shaped surface of the bushing body, and the rubber inlet channel is arranged opposite to the opening.

10. The aluminum alloy fork shaft/bush connection structure according to claim 8, wherein the opening is an elongated opening provided in the bush body in an axial direction.