Shifting fork limiting structure

Abstract

The utility model relates to the technical field of shifting forks, and discloses a shifting fork limiting structure which comprises a shifting fork shaft, the side wall of the shifting fork shaft is connected with a gear shifting fork in a sliding mode, and a limiting assembly is arranged on the inner wall of the gear shifting fork. According to the shifting fork limiting structure, the bolt pushes away the movable block towards the two sides, so that the movable block is inserted into the clamping groove, the stability degree of the gear shifting fork and the joint sleeve in the axial direction is improved, it is ensured that the gear shifting fork and the joint sleeve are firmly fixed in the axial direction, axial displacement is prevented, and the reliability of overall connection is improved; the length of the inserted pin inserted into the cross-shaped groove becomes longer and longer, then the bolt is pushed to be opened towards the two sides, the friction force between the bolt and the second trapezoidal block is improved, the self-locking effect is better, looseness caused by vibration is reduced, the connection stability is improved, the arc-shaped chamfer guides the inserted pin to enter the cross-shaped groove, and it is ensured that the inserted pin can be accurately inserted into the groove; and jamming caused by improper insertion is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shift forks, in particular to a shift fork limiting structure. Background Art

[0002] Currently, the gear shifting in the gearbox on the market mainly adopts the shift fork mechanism, which is specifically connected to the shift handle through the shift fork. Turning the shift handle drives the shift fork to shift the intermediate speed gear to change the input or output speed ratio. However, the connection stability between the shift fork and the coupling sleeve is poor, the shift fork and the coupling sleeve are easy to separate, and there is a lack of effective limiting structure to strengthen the strength between the shift fork and the coupling sleeve.

[0003] According to a disclosed fork limiting structure and fork assembly (Announcement No.: CN216279338U), the above application includes a fork and a coupling sleeve, a sliding hole is opened at the top of the fork, a plurality of first trapezoidal blocks are equidistantly arranged on the annular inner wall at the bottom of the fork, a first limiting groove is formed between the first trapezoidal blocks, a plurality of bolts are screwed on both sides of the fork, a plurality of second trapezoidal blocks are equidistantly arranged on the outer wall at the top of the coupling sleeve, a second limiting groove is formed between the second trapezoidal blocks.

[0004] However, during actual use of the above-mentioned shift fork limiting structure, the bolts will gradually loosen due to long-term vibration, which will cause the connection between the shift fork and the coupling sleeve to loosen, making the gear shifting operation unstable, causing relative movement between components, increasing wear and shortening the service life; in view of this, we propose a shift fork limiting structure. Summary of the invention

[0005] The purpose of the utility model is to provide a shift fork limiting structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a shift fork limiting structure, comprising a shift fork shaft, a side wall of the shift fork shaft being slidably connected with a shift fork, an inner wall of the shift fork being provided with a limiting component, and the limiting component comprising:

[0007] Trapezoidal block 1, the trapezoidal block 1 is fixedly connected to the inner wall of the shift fork, a slot is provided on the inclined surface of the trapezoidal block 1, a bolt is threadedly connected to the outer wall of the shift fork, and a cross slot is provided on the end surface of the bolt;

[0008] Trapezoidal block 2 is fixedly connected to the outer wall of the coupling sleeve, the inner wall of the trapezoidal block 2 is rotatably connected with a turntable, the end face of the turntable is fixedly connected with a latch, the inner wall of the trapezoidal block 2 is slidably connected with a movable block, and the side wall sleeve of the movable block is provided with a spring.

[0009] Preferably, the end face of the bolt is provided with an arc chamfer.

[0010] Preferably, a gear shifting block is slidably connected to the side wall of the shift fork shaft, a fixing sleeve is slidably connected to the side wall of the shift fork shaft, and a reverse shift fork is slidably connected to the side wall of the shift fork shaft.

[0011] Preferably, a plurality of groups of the first trapezoidal blocks and the second trapezoidal blocks are provided, and the plurality of groups of the first trapezoidal blocks and the second trapezoidal blocks are engaged with each other to improve the connection strength between the shift fork and the engaging sleeve.

[0012] Preferably, the movable block is inserted into the card slot, one end of the spring is fixedly connected to the inner wall of the second trapezoidal block, the other end of the spring is fixedly connected to the movable block, and the second trapezoidal block is movably connected to the bolt.

[0013] Preferably, the bolt is sleeved on the second trapezoidal block, the cross slot is inserted into the pin, the pin is provided with a large diameter end and a small diameter end, the small diameter end is arranged at one end close to the bolt, and the large diameter end is arranged at one end close to the turntable. When the bolt moves towards the second trapezoidal block, the bolt is pushed to expand towards both sides, improving the friction between the bolt and the second trapezoidal block.

[0014] Compared with the prior art, the present utility model provides a shift fork limiting structure, which has the following beneficial effects:

[0015] 1. For this shift fork limiting structure, through the cross slot, the pin and the movable block arranged, when the bolt moves into the second trapezoidal block, the bolt pushes the movable block to both sides, so that the movable block is inserted into the card slot, improving the axial stability between the shift fork and the engaging sleeve, ensuring that the shift fork and the engaging sleeve are firmly fixed axially, preventing axial displacement, improving the reliability of the overall connection. The pin is inserted into the cross slot. As the bolt rotates, the length of the pin inserted into the cross slot becomes longer and longer, and then the bolt is pushed to expand towards both sides, improving the friction between the bolt and the second trapezoidal block, having a better self-locking effect, reducing looseness caused by vibration, and improving connection stability.

[0016] 2. For this shift fork limiting structure, through the arc chamfer arranged, the pin is guided into the cross slot, ensuring that the pin can be accurately inserted into the slot, avoiding jamming caused by improper insertion, and making the pin more smooth when inserted into the cross slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the main structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the shift fork structure of the present utility model;

[0019] Figure 3 is the present utility model Figure 2 Schematic diagram of the structure of area A therein;

[0020] Figure 4Schematic diagram of the engaging sleeve structure of the present utility model;

[0021] Figure 5 For the present utility model Figure 4 Schematic diagram of the structure of area B in the present utility model;

[0022] Figure 6 Schematic diagram of the bolt structure of the present utility model.

[0023] In the figure: 1, shift fork shaft; 2, shift block; 3, fixed sleeve; 4, shift fork; 5, engaging sleeve; 6, reverse shift fork; 7, trapezoidal block 1; 8, card slot; 9, trapezoidal block 2; 10, bolt; 11, cross slot; 12, turntable; 13, pin; 14, movable block; 15, spring; 16, arc chamfer. Specific implementation manner

[0024] As Figures 1-6 shown, the present utility model provides a technical solution: a shift fork limiting structure, including a shift fork shaft 1, a shift block 2 is slidably connected to the side wall of the shift fork shaft 1, a fixed sleeve 3 is slidably connected to the side wall of the shift fork shaft 1, a reverse shift fork 6 is slidably connected to the side wall of the shift fork shaft 1, a shift fork 4 is slidably connected to the side wall of the shift fork shaft 1, and a limiting component is arranged on the inner wall of the shift fork 4. The limiting component includes a trapezoidal block 1 7, a card slot 8, a trapezoidal block 2 9, a bolt 10, a cross slot 11, a turntable 12, a pin 13, a movable block 14, a spring 15, and an arc chamfer 16.

[0025] In an embodiment of the present utility model, the trapezoidal block 1 7 is fixedly connected to the inner wall of the shift fork 4, a card slot 8 is opened on the inclined surface of the trapezoidal block 1 7, a bolt 10 is threadedly connected to the outer wall of the shift fork 4, a cross slot 11 is opened on the end surface of the bolt 10, and an arc chamfer 16 is opened on the end surface of the bolt 10.

[0026] Meanwhile, the trapezoidal block two 9 is fixedly connected to the outer wall of the engaging sleeve 5. A number of groups of the trapezoidal block one 7 and the trapezoidal block two 9 are provided, and a number of groups of the trapezoidal block one 7 and the trapezoidal block two 9 are engaged with each other, improving the connection strength between the shift fork 4 and the engaging sleeve 5. The inner wall of the trapezoidal block two 9 is rotatably connected with a turntable 12, and a plug pin 13 is fixedly connected to the end face of the turntable 12. The bolt 10 is sleeved with the trapezoidal block two 9, and the cross groove 11 is inserted with the plug pin 13. The plug pin 13 is provided with a large-diameter end and a small-diameter end. The small-diameter end is arranged at one end close to the bolt 10, and the large-diameter end is arranged at one end close to the turntable 12. The bolt 10 moves towards the trapezoidal block two 9, and then pushes the bolt 10 to expand towards both sides, improving the friction between the bolt 10 and the trapezoidal block two 9. The inner wall of the trapezoidal block two 9 is slidably connected with a movable block 14, and a spring 15 is sleeved on the side wall of the movable block 14. The movable block 14 is inserted into the clamping groove 8. One end of the spring 15 is fixedly connected to the inner wall of the trapezoidal block two 9, and the other end of the spring 15 is fixedly connected to the movable block 14. The trapezoidal block two 9 is movably connected with the bolt 10, and the spring 15 elastically pulls the movable block 14 to move towards the inside of the trapezoidal block two 9 through elasticity.

[0027] In addition, the trapezoidal block one 7 and the trapezoidal block two 9 are inserted together, and then the shift fork 4 and the engaging sleeve 5 are connected. The trapezoidal block one 7 and the trapezoidal block two 9 improve the connection strength between the shift fork 4 and the engaging sleeve 5. The bolt 10 is rotated to threadedly connect the bolt 10 with the shift fork 4. The bolt 10 further improves the connection stability between the shift fork 4 and the engaging sleeve 5. The bolt 10 moves towards the inside of the trapezoidal block two 9, and the bolt 10 pushes the movable block 14 to both sides, so that the movable block 14 is inserted into the clamping groove 8, improving the axial stability between the shift fork 4 and the engaging sleeve 5, ensuring that the shift fork 4 and the engaging sleeve 5 are firmly fixed axially, preventing axial displacement, and improving the reliability of the overall connection.

[0028] Furthermore, the bolt 10 moves towards the inside of the trapezoidal block two 9, so that the plug pin 13 is inserted into the cross groove 11. As the bolt 10 rotates, the length of the plug pin 13 inserted into the cross groove 11 becomes longer and longer, and then pushes the bolt 10 to expand towards both sides, improving the friction between the bolt 10 and the trapezoidal block two 9, having a better self-locking effect, reducing looseness caused by vibration, and improving connection stability.

[0029] In addition, an arc chamfer 16 is provided on the end face of the bolt 10. The arc chamfer 16 plays a role in guiding the plug pin 13 into the cross groove 11, ensuring that the plug pin 13 can be accurately inserted into the groove, avoiding jamming caused by improper insertion, and making the plug pin 13 more smooth when inserted into the cross groove 11.

[0030] In the present utility model, during use, the first trapezoidal block 7 and the second trapezoidal block 9 are plugged together. The shift fork 4 is connected to the engaging sleeve 5. Rotate the bolt 10. The bolt 10 is threadedly connected to the shift fork 4. The bolt 10 pushes the movable block 14 to both sides, causing the movable block 14 to insert into the card slot 8, and the pin 13 to insert into the cross slot 11, and then push the bolt 10 to expand to both sides.

[0031] The above has generally described the present utility model in detail. However, based on the present utility model, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, modifications or improvements made without departing from the spirit of the present utility model are within the protection scope of the present utility model.

Claims

1. A shift fork limiting structure, comprising a shift fork shaft (1), a side wall of the shift fork shaft (1) being slidably connected to a shift fork (4), characterized in that: The inner wall of the shift fork (4) is provided with a limit assembly, and the limit assembly comprises: Trapezoidal block one (7), the trapezoidal block one (7) being fixedly connected to the inner wall of the shift fork (4), a slot (8) being provided on the inclined surface of the trapezoidal block one (7), a bolt (10) being threadedly connected to the outer wall of the shift fork (4), and a cross slot (11) being provided on the end surface of the bolt (10); A second trapezoidal block (9) is fixedly connected to the outer wall of the coupling sleeve (5); a turntable (12) is rotatably connected to the inner wall of the second trapezoidal block (9); a latch (13) is fixedly connected to the end surface of the turntable (12); a movable block (14) is slidably connected to the inner wall of the second trapezoidal block (9); and a spring (15) is sleeved on the side wall of the movable block (14).

2. A shift fork limiting structure according to claim 1, characterized in that: The end surface of the bolt (10) is provided with an arc-shaped chamfer (16).

3. A shift fork limiting structure according to claim 1, characterized in that: The side wall of the shift fork shaft (1) is slidably connected to a stop block (2), the side wall of the shift fork shaft (1) is slidably connected to a fixing sleeve (3), and the side wall of the shift fork shaft (1) is slidably connected to a reverse gear shift fork (6).

4. A shift fork limiting structure according to claim 1, characterized in that: The number of the trapezoidal blocks 1 (7) and the trapezoidal blocks 2 (9) is arranged in a plurality of groups, and the plurality of groups of the trapezoidal blocks 1 (7) and the trapezoidal blocks 2 (9) are meshed with each other.

5. The shift fork limiting structure according to claim 1, characterized in that: The movable block (14) is plugged into the slot (8), one end of the spring (15) is fixedly connected to the inner wall of the second trapezoidal block (9), the other end of the spring (15) is fixedly connected to the movable block (14), and the second trapezoidal block (9) is movably connected to the bolt (10).

6. A shift fork limiting structure according to claim 1, characterized in that: The bolt (10) is sleeved with the trapezoidal block 2 (9), the cross slot (11) is plugged with the latch (13), and the latch (13) is provided with a large diameter end and a small diameter end, the small diameter end is provided at an end close to the bolt (10), and the large diameter end is provided at an end close to the turntable (12).

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