A loader split transmission

Abstract

The application discloses a loader split gearbox, which comprises a bottom shell, a top shell mounted on the top of the bottom shell, a first end shell mounted on one end of the top of the top shell, a second end shell mounted on the top of the first end shell, an end cover mounted on the top of the second end shell, a driving motor mounted on one end of the top of the end cover, an adjusting cylinder mounted on the other end of the top of the end cover, an output shaft of the driving motor connected with one end of a driving shaft, and the driving shaft connected with the inner wall of the end cover. In the application, the bottom shell and the top shell are combined to form a closed shell structure, the required parts of a speed change mechanism are installed in the closed shell structure, the first end shell, the second end shell and the end cover are combined to form a relatively sealed shell structure, the power output and the clutch assembly are installed in the first end shell, the second end shell and the end cover, and the disassembly and assembly convenience is improved in the maintenance process.

Description

Technical Field

[0001] This invention relates to the field of loader-related technology, and in particular to a split gearbox for a loader. Background Technology

[0002] A loader is a type of earthmoving machinery widely used in construction projects such as highways, railways, buildings, hydropower, ports, and mines. It is mainly used for shoveling and loading bulk materials such as soil, sand, gravel, lime, and coal. It can also perform light shoveling operations on ores and hard soil. With different auxiliary working devices, it can also perform bulldozing, lifting, and loading and unloading of other materials such as timber. In road construction, especially in high-grade highways, loaders are used for filling and excavating roadbeds, collecting and loading asphalt mixtures and cement concrete materials. In addition, they can also push and transport soil, level the ground, and tow other machinery. In some places where loading and transportation need to be carried out for a long time, loaders need to be used in conjunction with fixed traction equipment. The traction equipment is usually driven by an electric motor, and the motor is connected to a gearbox at the output end. Referring to the "Small Loader Gearbox" disclosed in Chinese Patent Publication No. "CN201145017Y", the gearbox is mainly composed of a hydraulic torque converter, a hydraulic shifting mechanism, and a mechanical shifting mechanism. The hydraulic torque converter is connected to the oil supply pump; the hydraulic shifting mechanism mainly consists of a hydraulic clutch, gear set, control valve, and handle. The mechanical shifting mechanism mainly consists of a gear set, engagement sleeve and engagement gear seat, shift fork, and handle. The turbine shaft of the hydraulic torque converter is connected to the shaft of the hydraulic clutch, and the hydraulic shifting mechanism and the mechanical shifting mechanism are engaged by gears. This utility model uses a control valve handle to realize the forward or reverse movement of the loading vehicle, and when used with the shift fork handle, it can also meet the needs of the loading vehicle for fast and slow forward and reverse transfer functions; it adopts hydraulic shifting, which reduces the labor intensity of the driver and has fewer malfunctions.

[0003] Currently used transmissions typically have complex structures, requiring manual operation during gear shifting. Furthermore, the clutch must be controlled synchronously during gear shifting, and the two operations cannot be automatically linked. Therefore, if an error occurs, the gears will grind together, affecting the overall service life. Moreover, they are usually integrated structures, with the power unit and transmission structure closely combined, making maintenance difficult. Summary of the Invention

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a split-type transmission for loaders. This addresses the problems mentioned in the background, such as the complex structure of currently used transmissions, the need for manual operation during gear shifting, the requirement for simultaneous clutch control during gear shifting, the lack of automatic linkage between the two operations, the resulting gear grinding in case of erroneous operation, which affects the overall service life, and the fact that they are usually essentially integrated structures with a high degree of integration between the power unit and the transmission structure, making maintenance difficult.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A loader split gearbox includes a base housing, a top housing mounted on the top of the base housing, and a first end housing mounted on one top end of the top housing; a second end housing mounted on the top of the first end housing, and an end cover mounted on the top of the second end housing; a drive motor mounted on one top end of the end cover, and an adjusting cylinder mounted on the other top end of the end cover; the output shaft of the drive motor is connected to one end of a drive shaft, and the drive shaft is connected to the inner wall of the end cover, while the end of the drive shaft extends through the second end housing into the interior of the first end housing; the end of the drive shaft is connected to a drive wheel, and a first engagement disc is mounted on the end of the drive wheel away from the drive motor; the end of the drive wheel near the drive motor is connected to a movable seat, and the movable seat is simultaneously connected to four sliding rods, each sliding rod having a return spring wrapped around its outer side; the ends of the four sliding rods all extend through the second end housing and are connected to a push plate, and the top of the push plate is connected to the adjusting cylinder; the first engagement disc is connected to the second engagement disc, and the second engagement disc is mounted on one top end of the top housing, while the first engagement disc... Two meshing discs are connected to a driving worm gear; the driving worm gear is installed inside the top shell and is connected to a driven wheel; the driven wheel is installed at one end of a transmission shaft, which is also installed inside the top shell; a second output wheel is installed in the middle of the transmission shaft and is connected to a second speed regulating wheel; the second speed regulating wheel is installed at one end of a sliding shaft, which is also installed inside the bottom shell; the sliding shaft passes through the transmission wheel, which is installed at the top of a fixed seat, which is also installed inside the top shell; the transmission wheel is connected to a third output wheel, which is installed at one end of an output shaft; the output shaft is installed inside the bottom shell, and its end passes through one side of the bottom shell and is connected to an output flange; a push plate is provided inside the bottom shell, and the push plate is slidably connected to a partition plate, which is also installed inside the bottom shell; an adjusting motor is installed on one side of the outer wall of the bottom shell, and the output shaft of the adjusting motor is connected to an adjusting rod; the adjusting rod is installed inside the bottom shell and is connected to the push plate.

[0007] Furthermore, the adjusting cylinder and the push plate form a sliding structure, and the axis of the push plate and the axis of the drive shaft are on the same horizontal straight line, while the push plate has a ring structure; the sliding rod and the second end shell are connected by a sliding connection, and the second end shell, together with the return spring and the push plate, form a telescopic structure.

[0008] Furthermore, the drive shaft and drive wheel are connected by a spline connection, and the drive wheel, together with the first meshing disc and the second meshing disc, form a rotating structure, while the first meshing disc has a ring structure.

[0009] Furthermore, the drive wheel is connected to the movable seat by rotation, and the movable seat is connected to the slide rod by sliding.

[0010] Furthermore, a first output wheel is installed at the end of the drive shaft away from the driven wheel, and the diameter of the first output wheel is larger than the diameter of the second output wheel. At the same time, the driven wheel, together with the drive shaft, the first output wheel, and the second output wheel, forms a rotating structure.

[0011] Furthermore, the adjustment rod and the push plate are connected by a threaded connection, and the adjustment rod and the push plate form a sliding structure.

[0012] Furthermore, one end of the sliding shaft passes through the partition and is rotatably connected to the push plate, and the connection between the sliding shaft and the partition is a sliding connection.

[0013] Furthermore, the middle part of the slide shaft has a spline structure, and the slide shaft is connected to the transmission wheel by a spline connection. The end of the slide shaft away from the second speed regulating wheel is equipped with a first speed regulating wheel, and the diameter of the first speed regulating wheel is smaller than the diameter of the second speed regulating wheel.

[0014] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0015] 1. In this invention, a bottom shell, a top shell, a first end shell, a second end shell, and an end cover are provided. The bottom shell and the top shell are combined to form a sealed shell structure. All the necessary parts of the transmission mechanism are installed in this sealed shell structure. The first end shell, the second end shell, and the end cover cooperate to form a relatively sealed shell structure. The power output and clutch components are installed inside the first end shell, the second end shell, and the end cover, which improves the convenience of disassembly and assembly during maintenance.

[0016] 2. In this invention, an adjusting cylinder, a drive shaft, a drive wheel, a first engagement disc, a movable seat, and slide rods are provided. When shifting gears, the adjusting cylinder is activated to drive the push disc to move backward as a whole, which in turn drives the four slide rods to move backward synchronously. During the movement of the slide rods, the movable seat and the drive wheel will move backward synchronously, thereby causing the first engagement disc to disengage from the second engagement disc and cut off the power output. At the same time, the overall structure is simple and has a low failure rate. In addition, the adjusting cylinder can be automatically controlled without manual intervention, which improves the ease of use.

[0017] 3. In this invention, a first meshing disc and a second meshing disc are provided. The first meshing disc and the second meshing disc are arranged parallel to each other. Compared with the traditional gears, when they mesh, only some teeth mesh with each other. When the first meshing disc and the second meshing disc mesh with each other, all the teeth on the first meshing disc and the second meshing disc mesh synchronously with each other. This can reduce the impact force between the meshing teeth, thereby reducing the wear rate between the first meshing disc and the second meshing disc, and improving the smoothness when shifting gears.

[0018] 4. In this invention, a sliding shaft, a push plate, an adjusting rod, and an adjusting motor are provided. The adjusting rod can be rotated by the adjusting motor to drive the push plate to slide left and right. The adjusting motor can be automatically controlled and is linked with the adjusting cylinder during startup, which effectively improves the synchronization during gear shifting.

[0019] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is the present invention. Figure 1 A bottom view;

[0022] Figure 3 This is the present invention. Figure 2 Rear view;

[0023] Figure 4 This is a three-dimensional structural diagram of the transmission shaft in this invention;

[0024] Figure 5 This is a three-dimensional structural schematic diagram of the second meshing disc in this invention;

[0025] Figure 6 This is a three-dimensional structural schematic diagram of the first meshing disc in this invention;

[0026] Figure 7 This is the present invention. Figure 6 A bottom view;

[0027] Figure 8 This is a three-dimensional structural diagram of the second speed regulating wheel in this invention;

[0028] Figure 9 This is the present invention. Figure 8 Side view;

[0029] Figure 10 This is the present invention. Figure 9 Side view;

[0030] Figure 11 This is the present invention. Figure 8 Top view.

[0031] The attached figures are labeled as follows: 1. Bottom shell, 2. Top shell, 3. First end shell, 4. Second end shell, 5. End cover, 6. Drive motor, 7. Adjusting cylinder, 8. Drive shaft, 9. Drive wheel, 10. First meshing disc, 11. Movable seat, 12. Slide rod, 13. Return spring, 14. Push plate, 15. Second meshing disc, 16. Drive worm gear, 17. Transmission shaft, 18. Driven wheel, 19. First output wheel, 20. Second output wheel, 21. Fixed seat, 22. Transmission wheel, 23. First speed regulating wheel, 24. Second speed regulating wheel, 25. Push plate, 26. Partition plate, 27. Adjusting rod, 28. Adjusting motor, 29. Third output wheel, 30. Output shaft, 31. Output flange, 32. Slide shaft. Detailed Implementation

[0032] Please refer to Figures 1 to 11The diagram illustrates the specific structure of a preferred embodiment of the present invention: a split-type gearbox for a loader, comprising a bottom housing 1, a top housing 2 mounted on the top of the bottom housing 1, and a first end housing 3 mounted on one top end of the top housing 2; a second end housing 4 mounted on the top of the first end housing 3, and an end cover 5 mounted on the top of the second end housing 4; a drive motor 6 mounted on one top end of the end cover 5, and an adjusting cylinder 7 mounted on the other top end of the end cover 5; the output shaft of the drive motor 6 is connected to one end of a drive shaft 8, and the drive shaft 8 is connected to the inner wall of the end cover 5, while the end of the drive shaft 8 extends through the second end housing 4 to the first end housing 3. Inside; the end of the drive shaft 8 is connected to the drive wheel 9, and a first engagement disc 10 is installed at the end of the drive wheel 9 away from the drive motor 6; the end of the drive wheel 9 near the drive motor 6 is connected to the movable seat 11, and the movable seat 11 is simultaneously connected to four slide rods 12, with a return spring 13 wrapped around the outside of each slide rod 12; the ends of the four slide rods 12 all pass through the second end shell 4 and are connected to the push plate 14, and the top of the push plate 14 is connected to the adjusting cylinder 7; the first engagement disc 10 is connected to the second engagement disc 15, and the second engagement disc 15 is installed at the top end of the top shell 2, while the second engagement disc... 15 is connected to the drive worm gear 16; the drive worm gear 16 is installed inside the top shell 2 and is connected to the driven wheel 18; the driven wheel 18 is installed at one end of the transmission shaft 17, and the transmission shaft 17 is installed inside the top shell 2; a second output wheel 20 is installed in the middle of the transmission shaft 17, and the second output wheel 20 is connected to the second speed regulating wheel 24; the second speed regulating wheel 24 is installed at one end of the sliding shaft 32, and the sliding shaft 32 is installed inside the bottom shell 1; the sliding shaft 32 passes through the transmission wheel 22, and the transmission wheel 22 is installed at the top of the fixed seat 21, while the fixed seat 21 is installed inside the top shell 2; The transmission wheel 22 is connected to the third output wheel 29, and the third output wheel 29 is installed at one end of the output shaft 30; the output shaft 30 is installed inside the bottom shell 1 at one end, and the end of the output shaft 30 passes through one side of the bottom shell 1 and is connected to the output flange 31; a push plate 25 is provided inside the bottom shell 1, and the push plate 25 is slidably connected to the partition plate 26, while the partition plate 26 is installed inside the bottom shell 1; an adjusting motor 28 is installed on one side of the outer wall of the bottom shell 1, and the output shaft of the adjusting motor 28 is connected to the adjusting rod 27; the adjusting rod 27 is installed inside the bottom shell 1 at one end, and the adjusting rod 27 is connected to the push plate 25.

[0033] More specifically, the power output section and the transmission mechanism can be separated by removing the first end shell 3, which has high ease of disassembly and assembly.

[0034] As a further explanation of this embodiment, the drive worm 16 drives the transmission shaft 17 to rotate, and the transmission shaft 17 cannot drive the drive worm 16 to rotate in the opposite direction. Therefore, it has a self-locking effect during use, which prevents the goods from falling off due to insufficient power, thus improving the safety of use.

[0035] In this embodiment, the adjusting cylinder 7 and the push plate 14 form a sliding structure, and the axis of the push plate 14 and the axis of the drive shaft 8 are on the same horizontal straight line. At the same time, the push plate 14 has a ring structure. The sliding rod 12 and the second end shell 4 are connected by a sliding connection, and the second end shell 4, together with the reset spring 13 and the push plate 14, form a telescopic structure.

[0036] More specifically, by adjusting the cylinder 7, the push plate 14 is driven to slide left and right in the horizontal direction. While the push plate 14 is moving, it works in conjunction with the slide rod 12 to drive the movable seat 11 to move synchronously, and at the same time, it begins to compress the return spring 13.

[0037] As a further explanation of this embodiment, the spring force generated after the return spring 13 is compressed helps the movable seat 11 return to its initial position.

[0038] In this embodiment, the drive shaft 8 and the drive wheel 9 are connected by a spline connection, and the drive wheel 9, together with the first meshing disk 10 and the second meshing disk 15, form a rotating structure. Meanwhile, the first meshing disk 10 has a ring structure.

[0039] More specifically, the drive shaft 8 drives the drive wheel 9 to rotate, and the drive wheel 9 can maintain power output while sliding horizontally along the drive shaft 8.

[0040] As a further explanation of this embodiment, the drive wheel 9 is fixed to the first meshing disc 10 by bolts, which facilitates individual replacement according to the wear length of the first meshing disc 10.

[0041] In this embodiment, the drive wheel 9 is connected to the movable seat 11 by rotation, and the movable seat 11 is connected to the slide rod 12 by sliding.

[0042] More specifically, the movable seat 11 is composed of two symmetrical ball bearings, and the drive wheel 9 can rotate freely on the movable seat 11.

[0043] As a further explanation of this embodiment, the slide bar 12 provides support for the drive wheel 9, and the slide bar 12 drives the movable seat 11 to move horizontally.

[0044] In this embodiment, a first output wheel 19 is installed at the end of the drive shaft 17 away from the driven wheel 18, and the diameter of the first output wheel 19 is larger than the diameter of the second output wheel 20. At the same time, the driven wheel 18, together with the drive shaft 17, the first output wheel 19 and the second output wheel 20, forms a rotating structure.

[0045] More specifically, when the first output wheel 19 and the first speed regulating wheel 23 are engaged, the second output wheel 20 and the second speed regulating wheel 24 are not in contact with each other.

[0046] As a further explanation of this embodiment, the transmission ratio of the first output wheel 19 with the first speed regulating wheel 23 is greater than that of the second output wheel 20 with the second speed regulating wheel 24.

[0047] In this embodiment, the adjusting rod 27 and the push plate 25 are connected by a threaded connection, and the adjusting rod 27 and the push plate 25 form a sliding structure.

[0048] More specifically, the adjustment rod 27 is rotated by adjusting the motor 28.

[0049] As a further explanation of this embodiment, the push plate 25 is moved left and right by rotating the adjusting rod 27.

[0050] In this embodiment, one end of the sliding shaft 32 passes through the partition 26 and is rotatably connected to the push plate 25, and the connection between the sliding shaft 32 and the partition 26 is a sliding connection.

[0051] More specifically, the end of the slide shaft 32 is connected to the push plate 25 via a bearing.

[0052] As a further explanation of this embodiment, the sliding shaft 32 is driven to slide synchronously in the same direction by moving the push plate 25.

[0053] In this embodiment, the middle part of the sliding shaft 32 is a spline structure, and the sliding shaft 32 is connected to the transmission wheel 22 by a spline connection. The end of the sliding shaft 32 away from the second speed regulating wheel 24 is equipped with a first speed regulating wheel 23, and the diameter of the first speed regulating wheel 23 is smaller than the diameter of the second speed regulating wheel 24.

[0054] More specifically, the two ends of the slide shaft 32 are smooth cylindrical structures, and the middle part of the slide shaft 32 is a spline structure.

[0055] As a further explanation of this embodiment, within the set sliding range, the slide shaft 32 always drives the transmission wheel 22 to rotate when it rotates.

[0056] The working principle of this invention is as follows: In use, first connect the output flange 31 to the loader, then connect the external power supply and start the drive motor 6. This, in conjunction with the drive shaft 8, drives the drive wheel 9 and the first meshing disc 10 to rotate. The first meshing disc 10, in conjunction with the second meshing disc 15, drives the drive worm gear 16 to rotate. Simultaneously, the drive worm gear 16, in conjunction with the driven wheel 18, drives the transmission shaft 17 to rotate. The transmission shaft 17, while rotating, simultaneously drives the first output wheel 19 and the second output wheel 20 to rotate synchronously. At this time, the second speed regulating wheel 24 meshes with the second output wheel 20, causing the sliding shaft 32 and the transmission wheel 22 to rotate at high speed synchronously. The sliding shaft 32, in conjunction with the third output wheel 29, drives the output shaft 30 and the output flange 31 to rotate at high speed. When deceleration and torque increase are required, the adjusting cylinder 7 and the adjusting motor 2... 8. Synchronous start-up: The push plate 14 begins to slide towards the drive motor 6 without being driven by the push plate 14. The synchronous push plate 14, in conjunction with the four slide rods 12, drives the movable seat 11 to slide synchronously and begins to compress the return spring 13. At the same time, it drives the first meshing plate 10 to disengage from the second meshing plate 15, thereby disconnecting the power output. Simultaneously, the regulating motor 28 drives the regulating rod 27 to start rotating, driving the push plate 25 to start sliding, which in turn drives the sliding shaft 32 to slide synchronously until the first output wheel 19 and the first speed regulating wheel 23 mesh together. At the same time, the second speed regulating wheel 24 disengages from the second output wheel 20. Finally, the regulating cylinder 7 is restarted, driving the push plate 14 to return to the initial position. At the same time, the rebounding return spring 13 pushes the drive wheel 9 and the first meshing plate 10 to quickly return to the initial position. After the first meshing plate 10 re-meshes with the second meshing plate 15, power transmission can be resumed.

[0057] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A split-type gearbox for a loader, characterized in that: The system includes a bottom shell (1), a top shell (2) mounted on the top of the bottom shell (1), and a first end shell (3) mounted on one end of the top of the top shell (2); a second end shell (4) mounted on the top of the first end shell (3), and an end cover (5) mounted on the top of the second end shell (4); a drive motor (6) mounted on one end of the top of the end cover (5), and an adjusting cylinder (7) mounted on the other end of the top of the end cover (5); the output shaft of the drive motor (6) is connected to one end of a drive shaft (8), and the drive shaft (8) is connected to the inner wall of the end cover (5), while the end of the drive shaft (8) extends through the second end shell (4) into the interior of the first end shell (3); the end of the drive shaft (8) is connected to a drive wheel (9), and the drive wheel... (9) A first engagement disc (10) is installed at the end away from the drive motor (6); the end of the drive wheel (9) near the drive motor (6) is connected to the movable seat (11), and the movable seat (11) is simultaneously connected to four slide rods (12), and each slide rod (12) is wrapped with a return spring (13); the ends of the four slide rods (12) all pass through the second end shell (4) and are connected to the push plate (14), and the top of the push plate (14) is connected to the adjusting cylinder (7); the first engagement disc (10) is connected to the second engagement disc (15), and the second engagement disc (15) is installed at the top end of the top shell (2), and the second engagement disc (15) is connected to the drive worm (16); the drive worm A rod (16) is installed inside the top shell (2), and the driving worm gear (16) is connected to the driven wheel (18); the driven wheel (18) is installed at one end of the transmission shaft (17), and the transmission shaft (17) is installed inside the top shell (2); a second output wheel (20) is installed in the middle of the transmission shaft (17), and the second output wheel (20) is connected to the second speed regulating wheel (24); the second speed regulating wheel (24) is installed at one end of the sliding shaft (32), and the sliding shaft (32) is installed inside the bottom shell (1); the sliding shaft (32) passes through the transmission wheel (22), and the transmission wheel (22) is installed at the top of the fixed seat (21), while the fixed seat (21) is installed inside the top shell (2); the transmission wheel (22) and The third output wheel (29) is connected and the third output wheel (29) is installed at one end of the output shaft (30); the output shaft (30) is installed at one end inside the bottom shell (1), and the end of the output shaft (30) passes through one side of the bottom shell (1) and is connected to the output flange (31); a push plate (25) is provided at one end inside the bottom shell (1), and the push plate (25) is slidably connected to the partition plate (26), while the partition plate (26) is installed inside the bottom shell (1); an adjustment motor (28) is installed on one side of the outer wall of the bottom shell (1), and the output shaft of the adjustment motor (28) is connected to the adjustment rod (27); the adjustment rod (27) is installed at one end inside the bottom shell (1), and the adjustment rod (27) is connected to the push plate (25).

2. The loader split gearbox according to claim 1, characterized in that: The regulating cylinder (7) and the push plate (14) form a sliding structure, and the axis of the push plate (14) and the axis of the drive shaft (8) are on the same horizontal straight line. At the same time, the push plate (14) has a ring structure. The sliding rod (12) and the second end shell (4) are connected by a sliding connection, and the second end shell (4) and the return spring (13) and the push plate (14) form a telescopic structure.

3. The loader split gearbox according to claim 1, characterized in that: The drive shaft (8) and the drive wheel (9) are connected by a spline connection, and the drive wheel (9) and the first meshing disk (10) and the second meshing disk (15) form a rotating structure. At the same time, the first meshing disk (10) has a ring structure.

4. The loader split gearbox according to claim 1, characterized in that: The drive wheel (9) is connected to the movable seat (11) by rotation, and the movable seat (11) is connected to the slide rod (12) by sliding.

5. The loader split gearbox according to claim 1, characterized in that: The drive shaft (17) is equipped with a first output wheel (19) at the end away from the driven wheel (18), and the diameter of the first output wheel (19) is larger than the diameter of the second output wheel (20). At the same time, the driven wheel (18) cooperates with the drive shaft (17) to form a rotating structure with the first output wheel (19) and the second output wheel (20).

6. The loader split gearbox according to claim 1, characterized in that: The adjustment rod (27) and the push plate (25) are connected by a threaded connection, and the adjustment rod (27) and the push plate (25) form a sliding structure.

7. The loader split gearbox according to claim 1, characterized in that: One end of the sliding shaft (32) passes through the partition plate (26) and is rotatably connected to the push plate (25), and the connection between the sliding shaft (32) and the partition plate (26) is a sliding connection.

8. The loader split gearbox according to claim 5, characterized in that: The middle part of the sliding shaft (32) is a spline structure, and the connection between the sliding shaft (32) and the transmission wheel (22) is a spline connection. The end of the sliding shaft (32) away from the second speed regulating wheel (24) is equipped with a first speed regulating wheel (23), and the diameter of the first speed regulating wheel (23) is smaller than the diameter of the second speed regulating wheel (24).

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