Shifting fork structure with spring structure

Abstract

The utility model provides a gear shifting fork structure with a spring structure, and belongs to the field of all-terrain vehicles. The gear shifting device structurally comprises a gear shifting shaft, spring seats, an H-gear spring, an RL-gear spring, gear shifting forks and a speed changing drum, the two spring seats are fixedly connected to the gear shifting shaft, the H-gear spring is connected to one spring seat, the RL-gear spring is connected to the other spring seat, the gear shifting forks are connected to the end of the H-gear spring and the end of the RL-gear spring respectively, and the gear shifting forks are connected to the speed changing drum. And a speed change drum is arranged below the gear shifting shaft. According to the utility model, different high-gear and low-gear shifting forks are improved into the same shifting fork with a relatively simple structure, and meanwhile, the spline-type variable-speed drum mandrel and a cam mechanism with a complicated structure are improved into an integrated structure of the mandrel and the cam, so that the structure is simpler, and the manufacturing cost is greatly reduced. The utility model is suitable for an engine gearbox of an all-terrain vehicle, the structure is simplified, the manufacturing cost is reduced, and the using effect is not influenced.

Description

Technical Field

[0001] The utility model belongs to the field of all-terrain vehicles, and particularly relates to a shift fork structure with a spring structure. Background Technique

[0002] For the engine gearbox of an all-terrain vehicle, a typical shift fork mechanism is as Figure 1 shown. The force is transmitted to the shift fork structure as Figure 1 shown through a shift handle, a shift arm assembly, a shift shaft assembly, and a shift intermediate gear, so that the core shaft of the shift drum rotates, and then the high, low, and reverse shift forks transmit the force to the countershaft assembly for shifting. The high and low gear shift fork structures of this structure are different, increasing the manufacturing cost. Moreover, the core shaft of the shift drum and the shift drum cam structures of each gear are complex, and the manufacturing cost is relatively high. Summary of the Invention

[0003] The utility model aims at the technical defects of the prior art and provides a shift fork structure with a spring structure to solve the technical problems of the complex structure and high manufacturing cost of the conventional shift fork structure.

[0004] To achieve the above technical purposes, the utility model adopts the following technical solutions:

[0005] A shift fork structure with a spring structure includes a shift lever shaft, a spring seat, an H-gear spring, an RL-gear spring, a shift fork, and a shift drum. Among them, two spring seats are fixed on the shift lever shaft. An H-gear spring is connected to one of the spring seats, and an RL-gear spring is connected to the other spring seat. A shift fork is connected to each end of the H-gear spring and the RL-gear spring, and a shift drum is arranged below the shift lever shaft.

[0006] Preferably, the shift drum includes a core shaft, a gear, and a cam, and the core shaft, the gear, and the cam are fixed into an integral structure.

[0007] Preferably, there are two cams on the shift drum, and the two cams are respectively matched with the two shift forks.

[0008] The utility model provides a shift fork structure with a spring structure. This technical solution improves different high and low gear shift forks into the same relatively simple structure, and at the same time improves the spline-type shift drum core shaft and the complex cam mechanism into an integral structure of the core shaft and the cam, which not only makes the structure simpler, but also greatly reduces the manufacturing cost. The utility model is applicable to the engine gearbox of an all-terrain vehicle. Applying the utility model simplifies the structure, reduces the manufacturing cost, and does not affect the use effect. Brief Description of the Drawings

[0009] Figure 1 is a schematic diagram of a conventional shift fork structure;

[0010] Figure 2 is a schematic diagram of the present utility model;

[0011] In the figure:

[0012] 1. Shift rod 2. Spring seat 3. H-gear spring 4. RL-gear spring 5. Shift fork 6. Shift drum 7. H-gear shift fork 8. RL-gear shift fork 9. Shift drum core shaft 10. Shift drum cam 11. Shift drum spring. Specific embodiments

[0013] The specific embodiments of the present utility model will be described in detail below. To avoid excessive unnecessary details, the well-known structures or functions will not be described in detail in the following embodiments. The approximate language used in the following embodiments can be used for quantitative expressions, indicating that a certain change in quantity is allowed without changing the basic function. Unless otherwise defined, the technical and scientific terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art to which the present utility model belongs.

[0014] Embodiment 1

[0015] A shift fork structure with a spring structure, as Figure 2 shown, includes a shift shaft 1, a spring seat 2, an H-gear spring 3, an RL-gear spring 4, a shift fork 5, and a speed change drum 6. Among them, two spring seats 2 are fixed on the shift shaft 1. An H-gear spring 3 is connected to one of the spring seats 2, and an RL-gear spring 4 is connected to the other spring seat 2. A shift fork 5 is connected to each end of the H-gear spring 3 and the RL-gear spring 4, and a speed change drum 6 is arranged below the shift shaft 1.

[0016] Embodiment 2

[0017] A shift fork structure with a spring structure, as Figure 2 shown, includes a shift shaft 1, a spring seat 2, an H-gear spring 3, an RL-gear spring 4, a shift fork 5, and a speed change drum 6. Among them, two spring seats 2 are fixed on the shift shaft 1. An H-gear spring 3 is connected to one of the spring seats 2, and an RL-gear spring 4 is connected to the other spring seat 2. A shift fork 5 is connected to each end of the H-gear spring 3 and the RL-gear spring 4, and a speed change drum 6 is arranged below the shift shaft 1. Among them, the speed change drum 6 includes a core shaft, a gear, and a cam, and the core shaft, the gear, and the cam are fixed into an integrated structure. There are two cams on the speed change drum 6, and the two cams are respectively matched with the two shift forks 5.

[0018] The above has described the embodiments of the present utility model in detail, but the above content is only the preferred embodiments of the present utility model and is not used to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the scope of the application of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A shift fork structure with a spring structure, characterized in that, It includes a gear shift shaft (1), a spring seat (2), an H-gear spring (3), an RL-gear spring (4), a shift fork (5), and a shift drum (6). Among them, two spring seats (2) are fixed on the gear shift shaft (1). An H-gear spring (3) is connected to one of the spring seats (2), and an RL-gear spring (4) is connected to the other spring seat (2). A shift fork (5) is connected to each of the ends of the H-gear spring (3) and the RL-gear spring (4). A shift drum (6) is arranged below the gear shift shaft (1).

2. The shift fork structure with a spring structure according to claim 1, characterized in that, The shift drum (6) includes a core shaft, a gear, and a cam, and the core shaft, the gear, and the cam are fixed into an integral structure.

3. A shift fork structure with a spring structure according to claim 1, characterized in that, There are two cams on the shift drum (6), and the two cams are respectively matched with the two shift forks (5).

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