Walking gearbox for agricultural transport vehicle

Abstract

A walking gearbox for an agricultural transport vehicle relates to the technical field of gearboxes and comprises a box body, and a first power input shaft, a second power transmission shaft, a third power transmission shaft, a fourth power transmission shaft and a fifth power output shaft are arranged in the box body. The first power input shaft and the fifth power output shaft are vertically arranged, and a gear set connecting the first power input shaft, the second power transmission shaft, the third power transmission shaft, the fourth power transmission shaft and the fifth power output shaft is further arranged in the box body. The gearbox solves the problems that a gearbox in the prior art is only suitable for longitudinal arrangement of an engine output shaft, and when the engine output shaft is transversely arranged, the direction of the gearbox needs to be changed or other reversing structures need to be added, so that the power output stability is affected.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, specifically to a drive gearbox for agricultural transport vehicles. Background Technology

[0002] Existing agricultural transport vehicle gearboxes generally follow the design of engineering machinery gearboxes. The gearboxes typically have the input shaft, drive shaft, and output shaft arranged from top to bottom, while the engine output shaft is arranged longitudinally.

[0003] As existing devices are used, the shortcomings of this technology have gradually become apparent, mainly in the following aspects:

[0004] First, existing gearboxes are only suitable for engines with longitudinally arranged output shafts. When the engine output shaft is arranged laterally, the gearbox direction needs to be reversed or other reversing structures need to be added, which affects the stability of power output.

[0005] Secondly, due to the existing engine's transverse orientation, the front cross-sectional area is large, resulting in a large surface bump and high wind resistance.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a travel gearbox for agricultural transport vehicles, which solves the problem that traditional gearboxes are only suitable for longitudinally arranged engine output shafts. When the engine output shaft is arranged laterally, the gearbox direction needs to be reversed or other reversing structures need to be added, which affects the stability of power output.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A drive gearbox for agricultural transport vehicles includes a housing, within which are disposed a power input shaft one, a power transmission shaft two, a power transmission shaft three, a power transmission shaft four, and a power output shaft five; the power input shaft one and the power output shaft five are arranged perpendicularly to each other.

[0010] The housing is also equipped with a gear set that connects the power input shaft one, power transmission shaft two, power transmission shaft three, power transmission shaft four, and power output shaft five.

[0011] As an optimized solution, the gear set includes gear one, gear two, low-speed gear three, and high-speed gear four connected to the power input shaft one.

[0012] As an optimized solution, the gear set includes connecting gear five, gear six, gear seven, and gear eight connected to the power transmission shaft two; the large gear of connecting gear five meshes with the low-speed gear in three phases; the small gear of connecting gear five meshes with the high-speed gear in four phases; and gear eight meshes with gear two.

[0013] As an optimized solution, the gear set includes gear nine, connecting gear ten, and bevel gear eleven connected to the power transmission shaft three; the pinion of connecting gear ten meshes with gear six, gear nine meshes with gear eight or gear one, and the tenth gear of connecting gear ten meshes with gear seven.

[0014] As an optimized solution, the gear set includes a bevel gear thirteen and a gear fourteen connected to the power transmission shaft four; the bevel gear thirteen meshes with the bevel gear eleven.

[0015] As an optimized solution, the gear set includes a gear twelve connected to the output shaft five; the gear twelve meshes with the gear fourteen.

[0016] As an optimized solution, the housing is equipped with a high-low speed shift fork, which drives the connecting gear five to slide and adjust its position.

[0017] As an optimized solution, the housing is provided with a second and third gear shift fork, which drives the connecting gear to slide and adjust the position.

[0018] As an optimized solution, the housing is provided with a reverse gear fork, which drives the gear nine to slide and adjust its position.

[0019] As an optimized solution, the power input shaft one, power transmission shaft two, and power transmission shaft three are arranged side by side from top to bottom.

[0020] As an optimized solution, the power transmission shaft four and the power output shaft five are located on the other side of the housing.

[0021] As an optimized solution, one end of the power input shaft is connected to a clutch.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] The drive shaft and output shaft are arranged at a 90° angle, which is suitable for vehicles where the engine output shaft is set laterally and the drive axle requires longitudinal input, or other equipment where the input and output are arranged at a 90° angle.

[0024] With the engine positioned longitudinally, the front cross-sectional area becomes smaller, the car cover design becomes more streamlined, and wind resistance is reduced.

[0025] This invention provides a walking gearbox for an agricultural transport vehicle with three forward and one reverse gears, high and low speeds, and a total of six forward and two reverse speed outputs.

[0026] Both ends of the power output shaft five extend to the outside of the housing. Output shaft one provides power to working devices such as pumps, and output shaft two connects to the front and rear drive axles respectively to provide power to the normal walking device.

[0027] Both ends of the power input shaft in the gearbox extend to the outside of the housing, and one end can also have the function of power output. In addition to providing power for the vehicle's running system, the gearbox can also provide power for other working devices. The gearbox is more adaptable and has a wider range of applications. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0029] Figure 1 It is a structural diagram of the utility model;

[0030] Figure 2 This is a schematic diagram of the structure of this utility model viewed from the left.

[0031] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the high and low speed shift fork, the second and third speed shift fork, and the reverse gear shift fork of this utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the drive shift fork of this utility model;

[0034] Figure 6 This is a schematic diagram of the sliding clutch sleeve of this utility model in the disengaged state;

[0035] Figure 7 This is a schematic diagram of the sliding clutch sleeve of this utility model in the engaged state.

[0036] In the diagram: 1-Power input shaft one; 1.1 Bearing one; 1.2 Gear one; 1.3 Gear two; 1.4 Low-speed gear three; 1.5 High-speed gear four; 2-Power transmission shaft two; 2.1 Bearing two; 2.2 Connecting gear five; 2.3 Gear six; 2.4 Gear seven; 2.5 Gear eight; 3-Power transmission shaft three; 3.1 Bearing three; 3.2 Gear nine; 3.3 Connecting gear ten; 3.4 Bevel gear eleven; 4-Power transmission shaft four; 4.1 Bearing four; 4.2 Bevel gear thirteen; 4. 3 Gear Fourteen; 5 Power Output Shaft Five; 5.1 Bearing Five; 5.2 Gear Twelve; 5.4 Driven Shaft; 5.5 Drive Shaft; 5.6 Sliding Clutch Sleeve; 5.7 Bearing; 5.8 Stop Snap Ring; 6 Housing; 6.1 High and Low Speed ​​Shift Forks; 6.2 Second and Third Speed ​​Shift Forks; 6.3 Reverse Shift Fork; 6.4 Drive Shift Fork; 6.5 Slide Rod One; 6.6 Slide Rod Two; 6.7 Slide Rod Three; 6.8 Slide Rod Four; 7 Connecting Plate; 8 Handbrake; 9 Gear Lever One; 10 Gear Lever Two; 11 Top Cover; 12 Clutch. Detailed Implementation

[0037] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0038] like Figures 1 to 7 As shown, the travel gearbox for an agricultural transport vehicle includes a housing 6, within which are housed a power input shaft 1, a power transmission shaft 2, a power transmission shaft 3, a power transmission shaft 4, and a power output shaft 5; the power input shaft 1 and the power output shaft 5 are arranged perpendicularly to each other.

[0039] The housing 6 also contains a gear set that connects the power input shaft 1, the power transmission shaft 2, the power transmission shaft 3, the power transmission shaft 4, and the power output shaft 5.

[0040] The gear set includes gear 1.2, gear 1.3, low-speed gear 1.4, and high-speed gear 1.5, all connected to the power input shaft 1.

[0041] The gear set includes gear 5 2.2, gear 6 2.3, gear 7 2.4 and gear 8 2.5 connected to the power transmission shaft 2. The large gear of gear 5 2.2 meshes with the low-speed gear 3 1.4; the small gear of gear 5 2.2 meshes with the high-speed gear 4 1.5; and gear 8 2.5 meshes with gear 2 1.3.

[0042] The gear set includes gear 93.2, connecting gear 103.3, and bevel gear 113.4 connected to the power transmission shaft 33. The pinion of connecting gear 103.3 meshes with gear 62.3, gear 93.2 meshes with gear 82.5 or gear 11.2, and the large gear of connecting gear 103.3 meshes with gear 72.4.

[0043] The gear set includes bevel gear 13 4.2 and gear 14 4.3 connected to the power transmission shaft 4; bevel gear 13 4.2 meshes with bevel gear 11 3.4.

[0044] The gear set includes gear 12 5.2 connected to output shaft 5; gear 12 5.2 meshes with gear 14 4.3.

[0045] The housing 6 is equipped with a high-low speed shift fork 6.1, which drives the connecting gear 5 2.2 to slide and adjust the position.

[0046] The housing 6 is equipped with a second and third gear shift fork, which drives the connecting gear 3.3 to adjust the sliding position.

[0047] The housing 6 is equipped with a reverse gear fork 6.3, and the reverse gear fork 6.3 drives the gear 9 3.2 to slide and adjust its position.

[0048] The power input shaft 1, power transmission shaft 2, and power transmission shaft 3 are arranged side by side from top to bottom.

[0049] The power transmission shaft 4 and the power output shaft 5 are located on the other side of the housing 6.

[0050] One end of the power input shaft 1 is connected to a clutch 12.

[0051] The present invention provides bearings 1.1 on both sides of the power input shaft 1 of the gearbox, and uses the bearings 1.1 to assemble the power input shaft 1 onto the housing 6.

[0052] Bearings 2.1 are installed on both sides of the power transmission shaft 2, and the power transmission shaft 2 is assembled onto the housing 6 through the bearings 2.1.

[0053] Bearings 3.1 are installed on both sides of the power transmission shaft 3.1, and the power transmission shaft 3.1 is assembled onto the housing 6 through the bearings 3.1.

[0054] Bearings 4.1 are installed on both sides of the power transmission shaft 4, and the power transmission shaft 4 is assembled onto the housing 6 through the bearings 4.1.

[0055] Bearings 5.1 are installed on both sides of the power output shaft 5.1, and the power output shaft 5.1 is assembled onto the housing 6 through the bearings 5.1.

[0056] The gearbox housing 6 of this utility model is provided with three sets of slide rods and shift forks on the upper side, including high and low speed shift forks 6.1, second and third speed shift forks 6.2, reverse gear shift forks 6.3, slide rod one 6.5, slide rod two 6.6, and slide rod three 6.7.

[0057] The upper side is provided with baffles 9 and 10, which are installed on the housing 6 through the upper cover 11.

[0058] The high / low speed shift fork 6.1 changes the position of the connecting gear 5 2.2 to achieve high / low speed output; the second / third speed shift fork 6.2 changes the position of the connecting gear 10 3.3 to achieve second / third speed output; and the reverse gear shift fork 6.3 changes the position of gear 9 3.2 to achieve reverse gear output.

[0059] The working process of this device is as follows:

[0060] This invention provides a drive gearbox for agricultural transport vehicles, which has three forward and one reverse gears, with high and low speeds, and can output a total of eight speeds: six forward and two reverse.

[0061] When the transmission outputs at low speed, low-speed gear 3 (1.4) and connecting gear 5 (2.2) are constantly meshed; bevel gear 11 (3.4) and bevel gear 13 (4.2) mesh; and gear 14 (4.3) and gear 12 (5.2) mesh. When the transmission outputs at high speed, high-speed gear 4 (1.5) and connecting gear 5 (2.2) are constantly meshed; bevel gear 11 (3.4) and bevel gear 13 (4.2) mesh; and gear 14 (4.3) and gear 12 (5.2) mesh. When the transmission outputs second gear, gear 7 (2.4) and connecting gear 10 (3.3) are constantly meshed. When the transmission outputs third gear, gear 6 (2.3) and connecting gear 10 (3.3) are constantly meshed.

[0062] When the gearbox of this utility model is in low speed first gear, the high and low speed shift fork 6.1 is moved to make the low speed gear 3 1.4 and the connecting gear 5 2.2 large gear mesh, the gear 8 2.5 and the gear 9 3.2 mesh, the bevel gear 11 and the bevel gear 13 mesh, and the gear 14 and the gear 12 mesh.

[0063] Power transmission relationship: Engine power is transmitted to power input shaft 1 through clutch 12, and then to power transmission shaft 2 through the meshing of low-speed gear 3 (1.4) and connecting gear 5 (2.2). Power is transmitted to power transmission shaft 3 (3) through the meshing of gear 8 (2.5) and gear 9 (3.2). Power is transmitted to power transmission shaft 4 (4) through the meshing of bevel gear 11 and bevel gear 13. Power is transmitted to power output shaft 5 (5) through the meshing of gear 14 (4.3) and gear 12 (5.2), which then transmits power to the drive axle, providing power for the vehicle's movement.

[0064] When the gearbox of this utility model is in low speed second gear, the high / low speed shift fork 6.1 and the second / third speed shift fork 6.2 are moved to make the low speed gear 3 1.4 mesh with the large gear of the connecting gear 5 2.2, the gear 7 2.4 mesh with the large gear of the connecting gear 10 3.3, the bevel gear 11 mesh with the bevel gear 13, and the gear 14 mesh with the gear 12.

[0065] Power transmission relationship: Engine power is transmitted to power input shaft 11 via clutch 12, and then to power transmission shaft 2 via the meshing of low-speed gear 3 (1.4) and connecting gear 5 (2.2) and its large gear. Power is then transmitted to power transmission shaft 3 via the meshing of gear 7 (2.4) and connecting gear 10 (3.3) and its large gear. Power is transmitted to power transmission shaft 4 via the meshing of bevel gear 11 and bevel gear 13. Finally, power is transmitted to power output shaft 5 via the meshing of gear 14 (4.3) and gear 12 (5.2), which in turn transmits power to the drive axle, providing power for the vehicle's movement.

[0066] When the gearbox of this utility model is in low speed third gear, the high / low speed shift fork 6.1 and the second / third speed shift fork 6.2 are moved to make the low speed gear 3 1.4 mesh with the large gear of the connecting gear 5 2.2, the gear 6 2.3 mesh with the small gear of the connecting gear 10 3.2, the bevel gear 11 mesh with the bevel gear 13, and the gear 14 mesh with the gear 12.

[0067] Power transmission relationship: Engine power is transmitted to power input shaft 1 through clutch 12, and then to power transmission shaft 2 through the meshing of low-speed gear 3 (1.4) and connecting gear 5 (2.2). Power is transmitted to power transmission shaft 3 (3) through the meshing of gear 6 (2.3) and connecting gear 10 (3.2). Power is transmitted to power transmission shaft 4 (4) through the meshing of bevel gear 11 and bevel gear 13. Power is transmitted to power output shaft 5 (5) through the meshing of gear 14 (4.3) and gear 12 (5.2), which then transmits power to the drive axle, providing power for the vehicle's movement.

[0068] When the gearbox of this utility model is in low-speed reverse gear, the high-low speed shift fork 6.1 and the reverse gear shift fork 6.3 are moved to engage the low-speed gear 3 1.4 and the connecting gear 5 2.2 large gear, the gear 8 2.5 and the gear 2 1.3, the gear 1 1.2 and the gear 9 3.2, the bevel gear 11 and the bevel gear 13, and the gear 14 and the gear 12.

[0069] Power transmission relationship: Engine power is transmitted to power input shaft 11 via clutch 12, and then to power transmission shaft 2 via the meshing of low-speed gear 31.4 and connecting gear 52.2. Power is transmitted to power transmission shaft 33 via the meshing of gear 82.5 and gear 21.3, and gear 11.2 and gear 93.2. Power is transmitted to power transmission shaft 4 via the meshing of bevel gear 11 and bevel gear 13. Power is transmitted to power output shaft 5 via the meshing of gear 144.3 and gear 125.2. Power output shaft 5 transmits power to drive axle, providing power for vehicle movement.

[0070] When the transmission of this utility model is in high-speed first gear, the high-low speed shift fork 6.1 is moved to engage the high-speed gear 4 1.5 and the connecting gear 5 2.2 pinion, the gear 8 2.5 and the gear 9 3.2, the bevel gear 11 and the bevel gear 13, and the gear 14 and the gear 12.

[0071] Power transmission relationship: Engine power is transmitted to power input shaft 1 through clutch 12, and then to power transmission shaft 2 through the meshing of high-speed gear 4 1.5 and connecting gear 5 2.2. Power is transmitted to power transmission shaft 3 through the meshing of gear 8 2.5 and gear 9 3.2. Power is transmitted to power transmission shaft 4 through the meshing of bevel gear 11 and bevel gear 13. Power is transmitted to power transmission shaft 4 through the meshing of gear 14 4.3 and gear 12 5.2. Power is transmitted to power output shaft 5, which then transmits power to the drive axle to provide power for the vehicle's movement.

[0072] When the transmission of this utility model is in high-speed second gear, the high-low speed shift fork 6.1 and the second-third speed shift fork 6.2 are moved to engage the high-speed gear 4 1.5 with the small gear of the connecting gear 5 2.2, the gear 7 2.4 with the large gear of the connecting gear 10 3.2, the bevel gear 11 with the bevel gear 13, and the gear 14 with the gear 12.

[0073] Power transmission relationship: Engine power is transmitted to power input shaft 1 through clutch 12, and then to power transmission shaft 2 through the meshing of high-speed gear 4 1.5 and connecting gear 5 2.2 (small gear). Power is transmitted to power transmission shaft 3 through the meshing of gear 7 2.4 and connecting gear 10 3.2 (large gear). Power is transmitted to power transmission shaft 4 through the meshing of bevel gear 11 and bevel gear 13. Power is transmitted to power transmission shaft 4 through the meshing of gear 14 4.3 and gear 12 5.2. Power is transmitted to power output shaft 5, which then transmits power to the drive axle, providing power for the vehicle's movement.

[0074] When the transmission of this utility model is in high-speed third gear, the high-low speed shift fork 6.1 and the second and third gear shift fork 6.2 are moved to engage the high-speed gear 4 1.5 with the pinion of the connecting gear 5 2.2, the gear 6 2.6 with the pinion of the connecting gear 10 3.2, the bevel gear 11 with the bevel gear 13, and the gear 14 with the gear 12.

[0075] Power transmission relationship: Engine power is transmitted to power input shaft 1 through clutch 12, and then to power transmission shaft 2 through the meshing of high-speed gear 4 1.5 and connecting gear 5 2.2 pinion. Power is transmitted to power transmission shaft 3 through the meshing of gear 6 2.3 and connecting gear 10 3.2 pinion. Power is transmitted to power transmission shaft 4 through the meshing of bevel gear 11 and bevel gear 13. Power is transmitted to power output shaft 5 through the meshing of gear 14 4.3 and gear 12 5.2. Power output shaft 5 then transmits power to the drive axle, providing power for the vehicle's movement.

[0076] When the transmission of this utility model is in high-speed reverse gear, the high-low speed shift fork 6.1 and the reverse gear shift fork 6.3 are moved to engage the high-speed gear 4 1.5 and the connecting gear 5 2.2 pinion, the gear 8 2.5 and the gear 2 1.3, the gear 1 1.2 and the gear 9 3.2, the bevel gear 11 and the bevel gear 13, and the gear 14 and the gear 12.

[0077] Power transmission relationship: Engine power is transmitted to power input shaft 11 via clutch 12, and then to power transmission shaft 2 via the meshing of high-speed gear 4 1.5 and connecting gear 5 2.2. Power is transmitted to power transmission shaft 3 via the meshing of gear 8 2.5 and gear 2 1.3, and gear 1 1.2 and gear 9 3.2. Power is transmitted to power transmission shaft 4 via the meshing of bevel gear 11 and bevel gear 13. Power is transmitted to power output shaft 5 via the meshing of gear 14 4.3 and gear 12 5.2. Power output shaft 5 transmits power to the drive axle, providing power for the vehicle's movement.

[0078] In this utility model of gearbox, the power output shaft 5 can be designed as a through shaft. The power output shaft 5 is equipped with a connecting disc 7, a handbrake 8 and connected to the drive shaft to provide power to the walking device, thus providing four-wheel drive.

[0079] This utility model of a gearbox features a power output shaft 5, which can be designed as a drive shaft 5.5 and a driven shaft 5.4. A gear 12 5.2 is mounted on the drive shaft 5.5, and a bearing 5.7 is installed at the intermediate connection. An involute spline is designed on the outer diameter of the connection between the drive shaft 5.5 and the driven shaft 5.4, and a sliding clutch sleeve 5.6 is mounted on the spline. The sliding clutch sleeve 5.6 has an internal spline and a shift fork groove on its exterior. The gearbox housing 6 is equipped with a drive shift fork 6.3 and a sliding rod 6.8. The sliding clutch sleeve 5.6 is moved by moving the drive shift fork 6.3. When the shift fork 6.3 moves the sliding clutch sleeve 5.6 to the left, the sliding clutch sleeve 5.6 only engages with the driven shaft 5.4, and power is not transmitted to the driven shaft 5.4. Power is then transmitted from the right end of the drive shaft 5.5 through the transmission components to the front or rear axle, achieving two-wheel drive for the vehicle.

[0080] When the shift fork 6.3 drives the sliding clutch sleeve 5.6 to move to the right, the sliding clutch sleeve 5.6 simultaneously engages with the drive shaft 5.5 and the driven shaft 5.4. Power is transmitted to the driven shaft 5.4 through the spline sleeve. At this time, the power is transmitted from the left end of the driven shaft 5.4 and the right end of the drive shaft 5.5, and then transmitted to the front and rear axles through the transmission components, realizing four-wheel drive of the vehicle.

[0081] The half-shafts 5.4 and 5.5 are designed with external splines, and the sliding sleeve 5.6 is designed with internal splines. The end faces of the external splines of the half-shafts and the internal splines of the spline sleeve are chamfered with meshing angles. The drive fork 6.3 controls the movement of the sliding sleeve 5.6, so that the sliding sleeve 5.6 is connected to the two half-shafts 5.4 and 5.5 respectively or simultaneously, providing power to the walking device and realizing two-wheel drive or four-wheel drive.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not 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. 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, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A drive gearbox for agricultural transport vehicles, characterized in that: Includes a housing (6), which contains a power input shaft (1), a power transmission shaft (2), a power transmission shaft (3), a power transmission shaft (4), and a power output shaft (5); the power input shaft (1) and the power output shaft (5) are arranged perpendicularly to each other. The housing (6) is also equipped with a gear set that connects the power input shaft one (1), power transmission shaft two (2), power transmission shaft three (3), power transmission shaft four (4) and power output shaft five (5). The gear set includes gear one (1.2), gear two (1.3), low-speed gear three (1.4), and high-speed gear four (1.5) connected to the power input shaft one (1). The gear set includes gear five (2.2), gear six (2.3), gear seven (2.4), and gear eight (2.5) connected to the power transmission shaft two (2); the large gear of gear five (2.2) meshes with the low-speed gear three (1.4); the small gear of gear five (2.2) meshes with the high-speed gear four (1.5); and gear eight (2.5) meshes with gear two (1.3). The gear set includes gear nine (3.2), connecting gear ten (3.3), and bevel gear eleven (3.4) connected to the power transmission shaft three (3); the pinion of connecting gear ten (3.3) meshes with gear six (2.3), gear nine (3.2) meshes with gear eight (2.5) or gear one (1.2), and the large gear of connecting gear ten (3.3) meshes with gear seven (2.4).

2. The running gearbox for agricultural transport vehicles according to claim 1, characterized in that: The gear set includes a bevel gear thirteen (4.2) and a gear fourteen (4.3) connected to the power transmission shaft four (4); the bevel gear thirteen (4.2) meshes with the bevel gear eleven (3.4).

3. The running gearbox for agricultural transport vehicles according to claim 2, characterized in that: The gear set includes gear 12 (5.2) connected to the output shaft 5; gear 12 (5.2) meshes with gear 14 (4.3).

4. The running gearbox for agricultural transport vehicles according to claim 1, characterized in that: The housing (6) is provided with a high-low speed shift fork (6.1), which drives the connecting gear five (2.2) to slide and adjust its position.

5. The running gearbox for agricultural transport vehicles according to claim 1, characterized in that: The housing (6) is provided with a second and third gear shift fork (6.2), which drives the connecting gear (3.3) to slide and adjust its position.

6. The running gearbox for agricultural transport vehicles according to claim 1, characterized in that: The housing (6) is provided with a reverse gear fork (6.3), which drives the gear nine (3.2) to slide and adjust its position.

7. The running gearbox for agricultural transport vehicles according to claim 1, characterized in that: The power input shaft 1 (1), power transmission shaft 2 (2) and power transmission shaft 3 (3) are arranged side by side from top to bottom; the power transmission shaft 4 (4) and power output shaft 5 (5) are arranged on the other side of the housing (6).

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