Shift fork anti-rotation structure

Abstract

The utility model relates to gear shifting fork technical field, concretely relates to a kind of gear shifting fork anti-rotation structure, including first fork, first fork shaft, first handle slot and first anti-rotation plate;By setting first anti-rotation plate on the first fork shaft of gear shifting fork, limit connection using anti-rotation plate and first fork shaft, to limit the slight rotation of fork shaft around its axial direction, avoid the deflection of fork due to its dead weight, to ensure the service life of transmission;First fork shaft and first anti-rotation plate are simultaneously slidingly connected, so that first fork shaft can be according to the demand of use and carry out the operation of hanging gear, keep original transmission working principle, simple structure, obvious effect.

Description

Technical Field

[0001] This utility model relates to the field of shift fork technology, specifically to a shift fork anti-rotation structure. Background Technology

[0002] Compared to automatic transmissions, mechanical manual transmissions still have certain advantages in terms of cost and fuel economy, so there is still a stable market demand for manual transmissions.

[0003] To improve the reliability of manual transmission shifting mechanisms and reduce the impact on the shift sleeve during shifting, rotatable shift fork blocks are typically used instead of non-rotatable shift fork feet. However, after installation, since the axis of symmetry of the shift fork mechanism is not vertical, the shift fork mechanism, under its own weight, will cause the shift fork shaft to rotate slightly. This results in inconsistent spacing between the two sides of the shift fork and the sleeve groove. Consequently, the shift fork block on one side, after following the deflection of the shift fork mechanism, presses against the high-speed rotating sleeve groove. Over time, the shift fork block and the high-speed rotating sleeve groove rub against each other, damaging both the shift fork block and the sleeve groove, leading to wear and tear on the contact surface between the shift fork and the sleeve groove, thus affecting the service life of the transmission. Utility Model Content

[0004] The purpose of this invention is to provide a shift fork anti-rotation structure to solve the technical problem that the service life of the transmission is reduced due to the rotation of the shift fork.

[0005] The solution of this utility model to the above-mentioned technical problems is as follows: A shift fork anti-rotation structure includes a first shift fork, a first shift fork shaft, a first shift head groove, and a first anti-rotation plate; The first shift head groove is sleeved on the driving end of the first shift fork shaft and is engaged with the driving end of the first shift fork shaft. The first anti-rotation plate is sleeved on the anti-rotation end of the first shift fork shaft and is engaged with the anti-rotation end of the first shift fork shaft. The first shift fork is sleeved on the first shift fork shaft and is slidably connected to the first shift fork shaft. The first shift fork is located between the first shift head groove and the first anti-rotation plate.

[0006] Further, the first anti-rotation plate is provided with a first anti-rotation hole, which is sleeved on the outside of the anti-rotation end of the first shift fork shaft, and the first shift fork shaft is engaged with the first anti-rotation plate through the first anti-rotation hole.

[0007] Further specified, the cross section of the anti-rotation end of the first shift fork shaft perpendicular to the axis of the first shift fork shaft is polygonal or elliptical, and the shape of the first anti-rotation hole matches the contour of the anti-rotation end of the first shift fork shaft.

[0008] Further defined, the anti-rotation end of the first shift fork shaft has a D-shaped cross section perpendicular to the axis of the first shift fork shaft, the first anti-rotation hole has a D-shaped cross section perpendicular to its axis, and the anti-rotation end of the first shift fork shaft slides back and forth along the axis of the first anti-rotation hole.

[0009] Furthermore, both the first shift fork and the first shift head groove are engaged with the first shift fork shaft via a limiting pin.

[0010] Further specified, the bottom of the first shift fork is provided with a first shift fork block, the first shift fork block is rotatably connected to the bottom of the first shift fork, and the first shift fork block is located on the inner side wall of the first shift fork; The first shift fork block is magnetically connected to the inner wall of the first shift fork.

[0011] Further defining the shift fork anti-rotation structure, it further includes a second shift fork, a second shift fork shaft, a second shift head groove, and a second anti-rotation plate connected to the inside of the transmission. The second shift fork, the second shift head groove, and the second anti-rotation plate are all sleeved on the outside of the second shift fork shaft and connected to the second shift fork shaft. The second shift fork is located between the second shift head groove and the first shift fork. The second anti-rotation plate is located at the anti-rotation end of the second shift fork shaft. The second shift head groove and the first shift head groove are arranged side by side. The bottom of the second shift fork is provided with a second shift fork block, which is rotatably connected to the second shift fork and magnetically connected to the inner side wall of the second shift fork.

[0012] Further defining the shift fork anti-rotation structure, it also includes a third shift fork, a third shift fork shaft, a third shift head groove, and a third anti-rotation plate connected to the inside of the transmission. The third shift head groove is connected to the third shift fork shaft via the third shift fork. The third shift head groove is arranged in parallel with the second shift head groove. The third anti-rotation plate is located at the anti-rotation end of the third shift fork shaft. The third anti-rotation plate is used to limit the rotation of the third shift fork shaft around its axis. The bottom of the third shift fork is provided with a third shift fork block, which is rotatably connected to the third shift fork and magnetically connected to the inner side wall of the third shift fork.

[0013] Further, the anti-rotation end of the third shift fork shaft is provided with a limiting end face, and the third anti-rotation plate is provided with an anti-rotation block, which is located on one side of the limiting end face and in contact with the limiting end face.

[0014] Furthermore, the first anti-rotation plate, the second anti-rotation plate, the third anti-rotation plate, and the anti-rotation block are an integral structure.

[0015] The beneficial effects of this utility model are as follows: 1. This utility model sets a first anti-rotation plate on the first shift fork shaft of the shift fork, and uses the anti-rotation plate to limit the slight rotation of the shift fork shaft around its axis by limiting the connection between the anti-rotation plate and the first shift fork shaft, thereby preventing the shift fork from deflecting due to its own weight and thus ensuring the service life of the transmission; at the same time, the first shift fork shaft and the first anti-rotation plate are slidably connected, so that the first shift fork shaft can perform gear shifting operation according to the usage requirements, maintaining the original working principle of the transmission. The structure is simple and the effect is obvious.

[0016] 2. This utility model connects the first shift fork block and the first shift fork by magnetic attraction, ensuring that the first shift fork block can rotate adaptably during operation in the existing manner. At the same time, during rotation, it moves close to the inner side of the first shift fork shaft by magnetic attraction, thereby further avoiding damage caused by friction between the first shift fork block and the sliding sleeve groove.

[0017] 3. Based on the structure of the transmission, this utility model provides a second anti-rotation plate on the second shift fork shaft and a third anti-rotation plate on the third shift fork shaft, thereby meeting the different gear requirements while preventing the second and third shift fork shafts from rotating. This satisfies the usage requirements of the transmission for different gear positions. At the same time, the magnetic attraction between the second shift fork block and the third shift fork block and the third shift fork further prevents wear on the sliding sleeve groove, improves service life, and meets usage requirements. Attached Figure Description

[0018] Figure 1 This is a perspective view of the anti-rotation structure of the shift fork described in Embodiment 1 of this utility model; Figure 2 This is a perspective view of the first shift fork block as described in Embodiment 1 of this utility model; Figure 3 This is a side view of the anti-rotation structure of the shift fork described in Embodiment 2 of this utility model; Figure 4 This is a perspective view of the anti-rotation plate described in Embodiment 1 of this utility model; In the diagram, 10-first shift fork; 11-first shift fork block; 12-shift fork connecting post; 13-shift fork baffle; 14-magnet; 20-first shift fork shaft; 30-first shift head groove; 40-first anti-rotation plate; 41-first anti-rotation hole; 50-limiting pin; 60-second shift fork; 61-second shift fork shaft; 62-second shift fork block; 63-second shift head groove; 64-second anti-rotation plate; 65-second anti-rotation hole; 70-third shift fork; 71-third shift fork shaft; 72-third shift fork block; 73-third shift head groove; 74-third anti-rotation plate; 75-anti-rotation block. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Example 1 refer to Figure 1 This utility model provides a shift fork anti-rotation structure, including a first shift fork 10, a first shift fork shaft 20, a first shift head groove 30 and a first anti-rotation plate 40.

[0024] The first shift head groove 30 is fitted onto the drive end of the first shift fork shaft 20. By pushing the first shift head groove 30, the first shift fork shaft 20 is driven to reciprocate along its axis to achieve gear shifting. The first anti-rotation plate 40 is fitted onto the anti-rotation end of the first shift fork shaft 20. The first anti-rotation plate 40 is connected to the inside of the transmission housing to prevent the first anti-rotation plate 40 from deflecting around the axis of the first shift fork shaft 20. At the same time, the first shift fork shaft 20 and the first anti-rotation plate 40 are slidably connected to ensure that the first shift fork shaft 20 reciprocates perpendicular to the first anti-rotation plate 40 under the drive of the first shift head groove 30, thus ensuring reliable gear shifting operation of the first shift fork shaft 20.

[0025] The first shift fork 10 is sleeved on the first shift fork shaft 20. The first shift fork 10 is located between the first shift head groove 30 and the first anti-rotation plate 40. The first shift fork 10 is sleeved on the outside of the sliding sleeve groove and is used to drive the sliding sleeve groove to move back and forth to realize gear shifting.

[0026] The first shift fork 10 has a first shift fork block 11 at its bottom. The first shift fork block 11 includes a shift fork connecting post 12 and a shift fork baffle 13. The shift fork connecting post 12 and the shift fork baffle 13 are vertically connected to form a T-shaped structure. The shift fork connecting post 12 and the bottom of the first shift fork 10 are rotatably connected with a clearance fit. The shift fork baffle 13 is close to the inner side wall of the first shift fork 10. In actual operation, the first shift fork 10 is engaged with the sliding sleeve groove through the first shift fork blocks 11 on both sides, which drives the sliding sleeve groove to move.

[0027] The first shift fork 10, the first shift head groove 30, and the first anti-rotation plate 40 are all connected to the first shift fork shaft 20 to ensure that the first shift fork shaft 20 is restricted from rotating around its axis, while ensuring that the first shift head groove 30 and the first shift fork 10 are reliably engaged with the first shift fork shaft 20; the first shift fork 10, the first shift head groove 30, and the first anti-rotation plate 40 can all be selected to be engaged with the first shift fork shaft 20 by means of a limit pin 50.

[0028] By setting the first anti-rotation plate 40 to restrict the rotation of the first shift fork shaft 20, the first shift fork block 11 is prevented from squeezing the sliding sleeve groove, thus ensuring the service life and reliability of the transmission.

[0029] To further limit the rotation of the first shift fork shaft 20 by the first anti-rotation plate 40 and reduce the difficulty of modifying the existing shift fork shaft, it is preferable that the first anti-rotation plate 40 is provided with a first anti-rotation hole 41. The first anti-rotation hole 41 is sleeved on the outside of the anti-rotation end of the first shift fork shaft 20, and the first shift fork shaft 20 is engaged with the first anti-rotation plate 40 through the first anti-rotation hole 41.

[0030] For example, the anti-rotation end of the first shift fork shaft 20 has a polygonal or elliptical cross section perpendicular to the axis of the first shift fork shaft 20, and the shape of the first anti-rotation hole 41 matches the contour of the anti-rotation end of the first shift fork shaft 20.

[0031] Preferably, in order to ensure that the first anti-rotation plate 40 restricts the rotation of the first shift fork shaft 20 while avoiding affecting the reciprocating linear motion of the first shift fork shaft 20, the anti-rotation end of the first shift fork shaft 20 has a D-shaped cross section perpendicular to the axis of the first shift fork shaft 20, and the first anti-rotation hole 41 has a D-shaped cross section perpendicular to its axis direction, and the anti-rotation end of the first shift fork shaft 20 slides reciprocally along the axis of the first anti-rotation hole 41.

[0032] For further explanation, please refer to Figure 2To further prevent the first shift fork block 11 from squeezing the sliding sleeve groove and reducing its lifespan, it is preferable that the shift fork baffle 13 is magnetically connected to the inner wall of the first shift fork 10. This ensures that the first shift fork block 11 is close to the inner wall of the first shift fork 10, and that the first shift fork block 11 can also adaptively deflect around the shift fork connecting post 12 when it is engaged with the sliding sleeve groove, thus ensuring stable and smooth shifting and further meeting actual needs.

[0033] Among them, magnets 14 can be arranged on the back of the shift fork baffle 13 so that the first shift fork block 11 will not fall off in its natural state after being connected to the first shift fork 10.

[0034] Example 2 Since transmissions typically need to adjust to multiple gears, they usually contain multiple shift forks and shift fork shafts. Let's take the adjustment of a transmission from 1 to 6 gears as an example.

[0035] refer to Figure 3 Based on the shift fork anti-rotation structure described in Embodiment 1, this embodiment provides a shift fork anti-rotation structure, which also includes a second shift fork 60, a second shift fork shaft 61, a second shift head groove 63, and a second anti-rotation plate 64 connected to the inside of the transmission.

[0036] Similarly, the second shift fork 60, the second shift head groove 63, and the second anti-rotation plate 64 are all sleeved on the outside of the second shift fork shaft 61 and connected to the second shift fork shaft 61. The second shift fork 60 is located between the second shift head groove 63 and the first shift fork 10. The second anti-rotation plate 64 has a D-shaped second anti-rotation hole 65, and the second anti-rotation plate 64 is connected to the anti-rotation end of the second shift fork shaft 61 through the second anti-rotation hole 65. The second shift head groove 63 and the first shift head groove 30 are arranged side by side.

[0037] The bottom of the second shift fork 60 is provided with a second shift fork block 62, which is rotatably connected to the second shift fork 60 and magnetically connected to the inner side wall of the second shift fork 60.

[0038] The shift fork anti-rotation structure also includes a third shift fork 70, a third shift fork shaft 71, a third shift head groove 73, and a third anti-rotation plate 74 connected to the inside of the transmission. The third shift head groove 73 is engaged with the third shift fork shaft 71 through the third shift fork 70. The third shift head groove 73 is arranged in parallel with the second shift head groove 63. The third anti-rotation plate 74 is located at the anti-rotation end of the third shift fork shaft 71 and is used to limit the rotation of the third shift fork shaft 71 around its axis. The bottom of the third shift fork 70 is provided with a third shift fork block 72, which is rotatably connected to the third shift fork 70 and magnetically connected to the inner side wall of the third shift fork 70.

[0039] At this time, the first shift fork shaft 10 is the first / second gear shift fork shaft, the second shift fork shaft 61 is the third / fourth gear shift fork shaft, and the third shift fork shaft 71 is the fifth / sixth gear shift fork shaft.

[0040] To further explain, the third anti-rotation plate 74 can limit the rotation of the third shift fork shaft 71 by optionally providing an anti-rotation block 75 on the third anti-rotation plate 74, with a limiting end face provided on the anti-rotation end of the third shift fork shaft 71, and the anti-rotation block 75 located on one side of the limiting end face and in contact with the limiting end face, thereby using the third anti-rotation plate 74 connected to the inside of the transmission to limit the rotation of the third shift fork shaft 71; at this time, the cross section of the anti-rotation end of the third shift fork shaft 71 can also be selected as D-shaped, and the limiting end face of the anti-rotation end of the third shift fork shaft 71 is a flat surface of the D-shape.

[0041] For ease of assembly and disassembly, it is preferable that the first anti-rotation plate 40, the second anti-rotation plate 64, the third anti-rotation plate 74, and the anti-rotation block 75 are integrated into one structure.

[0042] To further explain, the first shift fork 10, the second shift fork 60, and the third shift fork 70 deflect sequentially in a counterclockwise direction during installation. Therefore, the deflection trend of the first shift fork 10, the second shift fork 60, and the third shift fork 70 is to drive the corresponding shift fork shaft to rotate clockwise. Preferably, the D-shape of the anti-rotation end of the first shift fork shaft 20 is set in the same direction as the D-shape of the anti-rotation end of the second shift fork shaft 61, and the D-shape of the anti-rotation end of the second shift fork shaft 61 is set opposite to the D-shape of the anti-rotation end of the third shift fork shaft 71. This makes the reaction force of the third anti-rotation plate 74 on the third shift fork shaft 71 opposite to the reaction force of the second anti-rotation plate 64 on the second shift fork shaft 61 and the reaction force of the first anti-rotation plate 40 on the first shift fork shaft 20. This can cancel out most of the forces and ensure that the resistance of the reciprocating linear motion of the first shift fork shaft 20, the second shift fork shaft 61, and the third shift fork shaft 71 is smaller.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A shift fork anti-rotation structure, characterized in that, It includes a first shift fork (10), a first shift fork shaft (20), a first shift head groove (30), and a first anti-rotation plate (40); The first shift head groove (30) is sleeved on the driving end of the first shift fork shaft (20) and engaged with the driving end of the first shift fork shaft (20). The first anti-rotation plate (40) is sleeved on the anti-rotation end of the first shift fork shaft (20) and engaged with the anti-rotation end of the first shift fork shaft (20). The first shift fork (10) is sleeved on the first shift fork shaft (20) and slidably connected to the first shift fork shaft (20). The first shift fork (10) is located between the first shift head groove (30) and the first anti-rotation plate (40).

2. The anti-rotation structure for the shift fork according to claim 1, characterized in that, The first anti-rotation plate (40) has a first anti-rotation hole (41), which is sleeved on the outside of the anti-rotation end of the first shift fork shaft (20). The first shift fork shaft (20) is engaged with the first anti-rotation plate (40) through the first anti-rotation hole (41).

3. The anti-rotation structure for the shift fork according to claim 2, characterized in that, The anti-rotation end of the first shift fork shaft (20) has a cross section perpendicular to the axis of the first shift fork shaft (20) that is polygonal or elliptical, and the shape of the first anti-rotation hole (41) matches the contour of the anti-rotation end of the first shift fork shaft (20).

4. The anti-rotation structure for the shift fork according to claim 2, characterized in that, The anti-rotation end of the first shift fork shaft (20) has a D-shaped cross section perpendicular to the axis of the first shift fork shaft (20), and the cross section of the first anti-rotation hole (41) perpendicular to its axis direction is D-shaped. The anti-rotation end of the first shift fork shaft (20) slides back and forth along the axis of the first anti-rotation hole (41).

5. The anti-rotation structure for the shift fork according to claim 4, characterized in that, The first shift fork (10) and the first shift head groove (30) are both engaged with the first shift fork shaft (20) by a limiting pin (50).

6. The shift fork anti-rotation structure according to any one of claims 1 to 5, characterized in that, The bottom of the first shift fork (10) is provided with a first shift fork block (11), the first shift fork block (11) is rotatably connected to the bottom of the first shift fork (10), and the first shift fork block (11) is located on the inner side wall of the first shift fork (10). The first shift fork block (11) is magnetically connected to the inner wall of the first shift fork (10).

7. The anti-rotation structure for the shift fork according to claim 6, characterized in that, The shift fork anti-rotation structure further includes a second shift fork (60), a second shift fork shaft (61), a second shift head groove (63), and a second anti-rotation plate (64) connected to the inside of the transmission. The second shift fork (60), the second shift head groove (63), and the second anti-rotation plate (64) are all sleeved on the outside of the second shift fork shaft (61) and connected to the second shift fork shaft (61). The second shift fork (60) is located between the second shift head groove (63) and the first shift fork (10). The second anti-rotation plate (64) is located at the anti-rotation end of the second shift fork shaft (61). The second shift head groove (63) and the first shift head groove (30) are arranged side by side. The bottom of the second fork (60) is provided with a second fork block (62), the second fork block (62) is rotatably connected to the second fork (60), and the second fork block (62) is magnetically connected to the inner side wall of the second fork (60).

8. The anti-rotation structure for the shift fork according to claim 7, characterized in that, The shift fork anti-rotation structure also includes a third shift fork (70), a third shift fork shaft (71), a third shift head groove (73), and a third anti-rotation plate (74) connected to the inside of the transmission. The third shift head groove (73) is connected to the third shift fork shaft (71) through the third shift fork (70). The third shift head groove (73) is arranged in parallel with the second shift head groove (63). The third anti-rotation plate (74) is located at the anti-rotation end of the third shift fork shaft (71). The third anti-rotation plate (74) is used to limit the rotation of the third shift fork shaft (71) around its axis. The bottom of the third shift fork (70) is provided with a third shift fork block (72), the third shift fork block (72) is rotatably connected to the third shift fork (70), and the third shift fork block (72) is magnetically connected to the inner side wall of the third shift fork (70).

9. The anti-rotation structure for the shift fork according to claim 8, characterized in that, The anti-rotation end of the third shift fork shaft (71) is provided with a limiting end face, and the third anti-rotation plate (74) is provided with an anti-rotation block (75). The anti-rotation block (75) is located on one side of the limiting end face and is in contact with the limiting end face.

10. The anti-rotation structure for the shift fork according to claim 8, characterized in that, The first anti-rotation plate (40), the second anti-rotation plate (64), the third anti-rotation plate (74) and the anti-rotation block (75) are an integral structure.

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