Adjustable gear shifting fork assembly

Abstract

The utility model discloses an adjustable shifting fork assembly which comprises a pull rod, a shifting fork sleeve is connected outside the pull rod through a linear bearing, a locking groove and a sliding groove are formed in the shifting fork sleeve, the locking groove and the sliding groove are perpendicular to each other and communicated with each other, and two symmetrically-arranged shifting fork claws are arranged in the sliding groove in a sliding mode. The shifting fork claw is detachably connected to the shifting fork sleeve through a bolt assembly, the pull rod is fixedly sleeved with a fixing piece, the top of the fixing piece is fixedly connected with a second permanent magnet, and the bottom of the linear bearing is fixedly connected with a first permanent magnet with the magnetism opposite to that of the second permanent magnet; and the upper end of the linear bearing is clamped on the pull rod through a first clamping spring to limit the sliding range of the linear bearing. According to the shifting fork, the two shifting fork claws are detachably installed on the shifting fork sleeve through the bolt assembly, the relative distance between the two shifting fork claws is adjusted according to needs, then the shifting fork can be matched with gear sleeves of various diameters, and the application range of the shifting fork is widened.

Description

Technical Field

[0001] This utility model relates to the field of shift fork technology, specifically to an adjustable shift fork assembly. Background Technology

[0002] In a transmission, gears of different sizes combine to form different gear ratios. When shifting gears, the shifting mechanism actually changes the meshing gears in the power transmission path, thereby changing the gear ratio.

[0003] Currently, most shift fork arms are molded as a single piece, making it impossible to freely adjust the distance between the two shift fork arms. This limits the application of a shift fork to gear sleeves of a fixed diameter, and prevents it from being used with gear sleeves of different diameters. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable shift fork assembly to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable shift fork assembly, comprising: a pull rod, a shift fork sleeve connected to the pull rod via a linear bearing, the shift fork sleeve having mutually perpendicular and interconnected locking grooves and sliding grooves, two symmetrically arranged shift fork claws slidably disposed within the sliding grooves, the shift fork claws being detachably connected to the shift fork sleeve via bolt assemblies, a fixing plate fixedly sleeved on the pull rod, a second permanent magnet fixedly connected to the top of the fixing plate, a first permanent magnet with opposite magnetism to the second permanent magnet fixedly connected to the bottom of the linear bearing, and the upper end of the linear bearing being snapped onto the pull rod via a first retaining ring to limit the sliding range of the linear bearing.

[0006] Furthermore, the bolt assembly passes through the locking groove and the mounting hole opened on the shift fork in sequence to lock the shift fork onto the shift fork sleeve.

[0007] Furthermore, a scale line is engraved on one side of the top locking groove of the shift fork sleeve.

[0008] Furthermore, a guide pin is fixedly connected to the top of the fixing plate, and a guide hole is provided on the fork sleeve for the guide pin to slide.

[0009] Furthermore, the upper and lower ends of the shift fork sleeve are respectively provided with a third snap ring and a second snap ring, which are snapped onto the linear bearing to lock and limit the linear bearing and the shift fork sleeve.

[0010] Furthermore, a retaining sleeve is fixedly sleeved on the pull rod, and the retaining sleeve is located above the first retaining spring.

[0011] In the above technical solution, the adjustable shift fork assembly provided by this utility model has the following beneficial effects:

[0012] 1. This utility model uses a bolt assembly to detachably install two shift fork claws onto the shift fork sleeve. The relative distance between the two shift fork claws can be adjusted as needed to adapt to tooth sleeves of various diameters, thus expanding the applicability of the shift fork.

[0013] 2. By setting a first permanent magnet and a second permanent magnet, when shifting gears, the shift fork sleeve and linear bearing will move downward relative to the pull rod against the repulsive force between the first and second permanent magnets. When the shift wheel and the gear teeth rotate at the same speed, they will spring into the groove and connect to achieve gear engagement. This avoids forcibly engaging the gear when the shift wheel and the gear teeth rotate at different speeds, reduces the impact noise between the shift wheel and the gear teeth during shifting, and greatly reduces the wear of the gear teeth and the shift wheel.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0015] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A structural schematic diagram provided for an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the fork claw mounting structure provided in an embodiment of the present utility model;

[0019] Figure 3 A cross-sectional view provided for an embodiment of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Pull rod; 11. Bolt assembly; 12. Sleeve; 2. Linear bearing; 3. Shift fork sleeve; 31. Shift fork claw; 32. Mounting hole; 33. Locking groove; 34. Through hole; 35. Guide hole; 36. Scale line; 37. Slide groove; 4. Fixing plate; 5. First permanent magnet; 6. Second permanent magnet; 7. Guide pin; 8. First snap ring; 9. Second snap ring; 10. Third snap ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0023] Please see Figures 1-3 An adjustable shift fork assembly includes: a pull rod 1, a shift fork sleeve 3 connected to the outside of the pull rod 1 via a linear bearing 2, a locking groove 33 and a sliding groove 37 arranged perpendicularly and communicating with each other on the shift fork sleeve 3, two symmetrically arranged shift fork claws 31 slidably disposed in the sliding groove 37, the shift fork claws 31 being detachably connected to the shift fork sleeve 3 via a bolt assembly 11, a fixing plate 4 fixedly sleeved on the outside of the pull rod 1, a second permanent magnet 6 fixedly connected to the top of the fixing plate 4, a first permanent magnet 5 with opposite magnetic properties to the second permanent magnet 6 fixedly connected to the bottom of the linear bearing 2, the upper end of the linear bearing 2 being snapped onto the pull rod 1 via a first retaining spring 8 to limit the sliding range of the linear bearing 2, and the linear bearing 2 being pressed against the first retaining spring 8 by the repulsive force between the first permanent magnet 5 and the second permanent magnet 6.

[0024] This utility model uses a bolt assembly 11 to detachably mount two shift fork claws 31 onto the shift fork sleeve 3. The relative distance between the two shift fork claws 31 can be adjusted as needed to accommodate tooth sleeves of various diameters, thereby expanding the applicability of the shift fork.

[0025] By setting a first permanent magnet 5 and a second permanent magnet 6, during gear shifting, the shift fork sleeve 3 and the linear bearing 2 will move downward relative to the pull rod 1 against the repulsive force between the first permanent magnet 5 and the second permanent magnet 6. At the same time, the distance between the first permanent magnet 5 and the second permanent magnet 6 becomes smaller, which increases the repulsive force between the first permanent magnet 5 and the second permanent magnet 6. When the shift wheel and the gear teeth rotate synchronously, they will spring into the groove and connect to achieve gear engagement. This avoids forcibly engaging the gear when the shift wheel and the gear teeth rotate at different speeds, reduces the impact noise between the shift wheel and the gear teeth during gear shifting, and greatly reduces the wear of the gear teeth and the shift wheel.

[0026] Furthermore, the bolt assembly 11 passes sequentially through the locking groove 33 and the mounting hole 32 on the shift fork pawl 31, locking the shift fork pawl 31 onto the shift fork sleeve 3. The bolt assembly 11 includes a bolt and a nut. By passing the bolt through the locking groove 33 and the mounting hole 32 and tightening it with the nut, a washer can be used appropriately to enhance stability.

[0027] Furthermore, a scale line 36 is engraved on one side of the top locking groove 33 of the shift fork sleeve 3. When installing the shift fork claw 31, the two shift fork claws 31 can be arranged symmetrically by observing the scale line 36.

[0028] Furthermore, a guide pin 7 is fixedly connected to the top of the fixed plate 4, and a guide hole 35 is provided on the shift fork sleeve 3 for the guide pin 7 to slide. The guide pin 7 plays a guiding role. When the pull rod 1 is pulled upward, the shift wheel and the gear teeth are not immediately aligned, so the shift fork pawl 31 is blocked. Then the force that pulls the pull rod 1 upward overcomes the repulsive force between the first permanent magnet 5 and the second permanent magnet 6, so that the guide pin 7 moves upward in the guide hole 35.

[0029] Furthermore, the upper and lower ends of the shift fork sleeve 3 are respectively provided with a third retaining spring 10 and a second retaining spring 9, which are engaged with the linear bearing 2 to lock and limit the linear bearing 2 and the shift fork sleeve 3. The second retaining spring 9 and the third retaining spring 10 are both engaged in the slots opened on the linear bearing 2, so as to limit the shift fork sleeve 3, which is sleeved on the linear bearing 2, between the second retaining spring 9 and the third retaining spring 10. The shift fork sleeve 3 is provided with a through hole 34, through which the linear bearing 2 passes and is locked on the shift fork sleeve 3 by the second retaining spring 9 and the third retaining spring 10.

[0030] Furthermore, a retaining sleeve 12 is fixedly sleeved on the pull rod 1. The retaining sleeve 12 is located above the first retaining spring 8. Different gear shifting forces cause various types of wear to the pull rod 1. By setting the retaining sleeve 12, the wear of the pull rod 1 is reduced, and the movement stroke of the pull rod 1 is limited to prevent gear shifting failure due to excessive force.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An adjustable shift fork assembly, comprising: A pull rod (1) is characterized in that: a fork sleeve (3) is connected to the outside of the pull rod (1) via a linear bearing (2), and a locking groove (33) and a sliding groove (37) are provided on the fork sleeve (3) and are arranged perpendicularly to each other and connected. Two symmetrically arranged fork claws (31) are slidably arranged in the sliding groove (37). The fork claws (31) are detachably connected to the fork sleeve (3) via a bolt assembly (11). A fixing plate (4) is fixedly sleeved on the outside of the pull rod (1). A second permanent magnet (6) is fixedly connected to the top of the fixing plate (4). A first permanent magnet (5) with the opposite magnetic properties to the second permanent magnet (6) is fixedly connected to the bottom of the linear bearing (2). The upper end of the linear bearing (2) is clamped to the pull rod (1) via a first snap ring (8) to limit the sliding range of the linear bearing (2).

2. The adjustable shift fork assembly according to claim 1, characterized in that, The bolt assembly (11) passes through the locking groove (33) and the mounting hole (32) opened on the shift fork claw (31) in sequence, and then locks the shift fork claw (31) onto the shift fork sleeve (3).

3. The adjustable shift fork assembly according to claim 1, characterized in that, The top locking groove (33) of the shift fork sleeve (3) has a scale line (36) engraved on one side.

4. The adjustable shift fork assembly according to claim 1, characterized in that, The top of the fixed plate (4) is fixedly connected to a guide pin (7), and the fork sleeve (3) is provided with a guide hole (35) for the guide pin (7) to slide.

5. An adjustable shift fork assembly according to claim 1, characterized in that, The upper and lower ends of the shift fork sleeve (3) are respectively provided with a third snap ring (10) and a second snap ring (9) that are snapped onto the linear bearing (2) to lock and limit the linear bearing (2) and the shift fork sleeve (3).

6. The adjustable shift fork assembly according to claim 1, characterized in that, A retaining sleeve (12) is fixedly sleeved on the pull rod (1), and the retaining sleeve (12) is located above the first retaining spring (8).

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