Shifting fork assembly with long service life

Abstract

The utility model provides a long-service-life shifting fork assembly, and belongs to the technical field of shifting forks. A long-service-life shifting fork assembly comprises a shifting fork, a shifting fork shaft is installed in the middle of the shifting fork, two feet of the shifting fork drive a shifting rod to move, and sliding plate assemblies are arranged on the inner walls of the two feet of the shifting fork in a sliding mode. The sliding plate assembly comprises a clamping block sliding in the shifting fork, protruding parts are arranged on the end faces of the two sides of the clamping block, a plurality of balls are further arranged in the shifting fork in a rolling mode, and the protruding parts of the two sides of the clamping block are clamped between the two corresponding balls. Through rolling friction of the balls, previous sliding friction of the shifting fork is changed into rolling friction, so that friction force of the shifting fork is greatly reduced, abrasion of the shifting fork is reduced, and the service life of the shifting fork is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of shift forks, and in particular relates to a long-life shift fork assembly. Background Art

[0002] The shift fork shaft assembly is a component of the automobile gearbox. It is connected to the speed shift handle and is located at the lower end of the handle. It moves the synchronizer sleeve to achieve gear shifting. When the shift fork is moved, the synchronization rod will produce sliding friction with it. The sliding friction causes greater wear and tear, which can easily cause the shift fork to be worn and consumed, reducing the service life of the shift fork. Utility Model Content

[0003] The utility model aims at the deficiencies of the prior art and provides a long-life shift fork assembly.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a long-life shift fork assembly, comprising a shift fork, characterized in that: a shift fork shaft is installed in the middle of the shift fork, the two feet of the shift fork drive the shift rod to move, and the inner walls of the two feet of the shift fork are slidably provided with a slide plate assembly;

[0005] The slide plate assembly comprises a block sliding in the fork, with protrusions on both side end faces of the block, and a plurality of balls rolling in the fork, with the protrusions on both sides of the block clamped between two corresponding balls.

[0006] Optionally, a sliding cavity is opened on the inner walls of the two legs of the fork, and a sliding groove is also opened on the inner wall of the sliding cavity. The raised parts on both sides of the block slide in the sliding groove, and the block slides in the sliding cavity. A spring is fixed between the block and the inner wall of the sliding cavity.

[0007] Optionally, a ball groove is further provided in the shift fork, the ball is installed in the ball groove, and the ball groove is connected to the corresponding slide groove.

[0008] Optionally, the width of the connection between the ball groove and the slide groove is smaller than the diameter of the ball.

[0009] Optionally, the ball groove is communicated with the outside, and a limit plug is detachably installed on the outside part thereof, so as to block the ball groove through the limit plug.

[0010] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. Due to the setting of the slide plate assembly, the block can be clamped to make the block and the toggle rod move synchronously. Through the rolling friction of the ball, the sliding friction before the fork is changed to rolling friction, thereby greatly reducing the friction of the fork, reducing the wear of the fork, and extending the service life of the fork.

[0012] 2. When the ball is worn, it can be replaced by removing the limit plug, or the block can be directly replaced when it is worn, further extending the service life of the fork. Moreover, when the fork is worn, there is no need to replace the entire fork, which greatly reduces the cost of the fork. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of the utility model.

[0014] Figure 2 It is the front view of the utility model.

[0015] Figure 3 For this utility model Figure 2 Cross-sectional view along the AA direction.

[0016] Figure 4 For this utility model Figure 2 Cross-sectional view along the BB direction.

[0017] 10. Shift fork; 11. Shift fork shaft; 12. Shift rod; 13. Block; 14. Sliding cavity; 15. Slide groove; 16. Limit plug; 17. Ball. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0019] As shown in Figures 1-4, a long-life fork assembly includes a fork 10, a fork shaft 11 is installed in the middle of the fork 10, and the two feet of the fork 10 drive the shift rod 12 to move. The inner walls of the two feet of the fork 10 are slidably provided with a slide plate assembly, and the slide plate assembly includes a block 13 sliding in the fork 10, and the two side end faces of the block 13 are provided with raised parts. A plurality of balls 17 are also rolled in the fork 10, and the raised parts on both sides of the block 13 are stuck between the corresponding two balls 17. Sliding cavities 14 are provided on the inner walls of the two feet of the fork 10, and sliding grooves 15 are also provided on the inner wall of the sliding cavity 14. The raised parts on both sides of the block 13 slide in the sliding grooves 15, and the block 13 slides in the sliding cavity 14. A spring is fixed between the block 13 and the inner wall of the sliding cavity 14.

[0020] A ball groove is also provided in the shift fork 10, and the ball 17 is installed in the ball groove. The ball groove is connected to the corresponding slide groove 15, and the width of the connection between the ball groove and the slide groove 15 is smaller than the diameter of the ball 17. The ball groove is connected to the outside world, and a limit plug 16 is removably installed on the outside part to block the ball groove through the limit plug 16.

[0021] When the fork 10 is in use, the fork 10 is driven to swing by rotating the fork shaft 11, and the fork 10 can be driven to slide back and forth by the swinging of the fork 10. At this time, the block 13 on the fork 10 clamps the toggle rod 12. When driving the toggle rod 12 to slide, the block 13 compression spring slides in the sliding cavity 14 through the restriction of the toggle rod 12. When the fork 10 drives the toggle rod 12 to move to the ends on both sides, the block 13 moves to the ends of the two feet of the fork 10. During the movement of the block 13, the convex part thereof contacts and slides with the ball 17 for sliding. The rolling friction of the ball 17 greatly reduces the friction force of the block 13, reduces the wear of the block 13, and prolongs the service life of the fork 10. When the ball 17 is worn, it can be replaced by removing the limit plug 16, which further prolongs the service life of the fork 10. When the fork 10 is worn, there is no need to replace the entire fork 10, which greatly reduces the cost of the fork.

[0022] Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A long-life shift fork assembly, comprising a shift fork (10), characterized in that: A shift fork shaft (11) is installed in the middle of the shift fork (10), and the two feet of the shift fork (10) drive the shift rod (12) to move, and the inner walls of the two feet of the shift fork (10) are slidably provided with a slide plate assembly; The slide plate assembly comprises a block (13) sliding in the shift fork (10), with protrusions provided on both side end faces of the block (13), and a plurality of balls (17) rollingly provided in the shift fork (10), with the protrusions on both sides of the block (13) being clamped between two corresponding balls (17).

2. A long-life shift fork assembly according to claim 1, characterized in that: A sliding cavity (14) is provided on the inner walls of the two legs of the shift fork (10), and a sliding groove (15) is also provided on the inner wall of the sliding cavity (14). The protruding parts on both sides of the clamping block (13) slide in the sliding groove (15), and the clamping block (13) slides in the sliding cavity (14). A spring is fixed between the clamping block (13) and the inner wall of the sliding cavity (14).

3. A long-life shift fork assembly according to claim 2, characterized in that: A ball groove is also provided in the shift fork (10), the ball (17) is installed in the ball groove, and the ball groove is connected to the corresponding slide groove (15).

4. A long-life shift fork assembly according to claim 3, characterized in that: The width of the connection between the ball groove and the slide groove (15) is smaller than the diameter of the ball (17).

5. The long-life shift fork assembly according to claim 3 is characterized in that: The ball groove is in communication with the outside, and a limit stopper (16) is detachably mounted on the outside portion thereof, and the ball groove is blocked by the limit stopper (16).

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