Three-shaft type power reversing and power high-low transmission system and tractor

Abstract

The three-shaft type power reversing and power high-low transmission system comprises a power gear shifting area and a main and auxiliary speed change gear shifting area, the power gear shifting area comprises a power reversing part and a power high-low part, and the power gear shifting area is provided with a reverse gear and two forward gears. The main and auxiliary speed change gear area is provided with four main speed change gears and three auxiliary speed change gears, 24 forward gears are arranged in the forward gear mode, and 12 reverse gears are arranged in the reverse gear mode. Switching between the forward gear and the reverse gear is controlled through the wet clutch, namely, a power reversing structure is adopted, and gear shifting is convenient, fast and comfortable; switching between the forward low gear and the forward high gear is controlled through the wet clutch, namely, a power high-low structure is adopted, power does not need to be cut off in the gear shifting process, the number of operating rods can be effectively reduced, and gear shifting is convenient, fast and comfortable.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor technical field, concretely relates to a three axle type power reversal and power high low transmission system and tractor. BACKGROUND

[0002] At present, the tractor transmission system generally adopts up and down two axle type arrangement structure, the transmission system gear quantity is much, transmission efficiency is low, front and rear axle distance is long, turning radius is big, the tractor generally adopts mechanical gear shift structure at present, and the operation handle is much, gear shift force is heavy, and the power needs to be interrupted in the gear shift process, leads to tractor overall operation efficiency reduction, and user experience degree drops. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a novel tractor transmission system arrangement structure is provided to overcome the deficiency of above-mentioned traditional technology, and the structure is compact, gear quantity is reduced obviously, front and rear axle distance is effectively shortened, and gear shift is comfortable, and the operation is convenient.

[0004] The utility model discloses a three axle type power reversal and power high low transmission system, and its characterized in that: including power gear shift area, main and deputy transmission gear shift area, transmission axle system, gear system and clutch system, transmission axle system includes power output front section axle, input shaft, output shaft, main transmission input shaft, intermediate axle, power output rear section axle, small conical gear shaft and reverse idler axle,

[0005] Gear system includes reverse drive gear, reverse idler, reverse driven gear, low gear drive gear, low gear driven gear, high gear drive gear, high gear driven gear, first gear drive gear, first gear driven gear, second gear drive gear, second gear driven gear, third gear drive gear, third gear driven gear, fourth gear drive gear, fourth gear driven gear, A gear drive gear, A gear driven gear, B gear drive gear, B gear driven gear, C gear driven gear, small conical gear, hydraulic output drive gear, hydraulic output idler, hydraulic output driven gear and transfer case gear,

[0006] Clutch system includes: reverse wet clutch, low gear wet clutch and high gear wet clutch,

[0007] Power gear shift area includes power reversal and power high and low two parts, and power gear shift area has a reverse wet clutch and two forward gear wet clutches from front to back, and two forward gear wet clutches include a high gear clutch and a low gear clutch, and main and deputy transmission gear shift area has four main transmission gears and three deputy transmission gears, and power gear shift area is used to switch reverse gear, forward gear low gear and forward gear high gear, and reverse gear adopts three axle type arrangement structure,

[0008] As a preferred embodiment: the reverse gear adds a reverse idler shaft, and the forward gears directly utilize the high-gear wet clutch and the low-gear wet clutch to transmit power. The main and auxiliary transmission shifting areas adopt a three-shaft arrangement structure, with the main transmission input shaft, intermediate shaft, and small bevel gear shaft arranged in a triangular spatial distribution. Power is transmitted from the main transmission input shaft to the small bevel gear shaft via the intermediate shaft. The main transmission shifts between first, second, third, and fourth gears between the main transmission input shaft and the intermediate shaft, and between the intermediate shaft and the small bevel gear shaft, the auxiliary transmission shifts between gears A, B, and C. When in gear C, the first gear driven gear is used as the C gear driving gear.

[0009] As a preferred embodiment: the main transmission input shaft, intermediate shaft and small bevel gear shaft are connected by a synchronizer and a meshing sleeve to achieve gear switching, and the power is transmitted through a spline sleeve.

[0010] As a preferred embodiment: the reverse drive gear, low gear drive gear, and high gear drive gear are loosely mounted on the input shaft via deep groove ball bearings; the first gear drive gear, second gear drive gear, third gear drive gear, and fourth gear drive gear are loosely mounted on the main transmission input shaft via needle roller bearings; the A gear driven gear, B gear driven gear, and C gear driven gear are loosely mounted on the small bevel gear shaft via needle roller bearings.

[0011] As a preferred embodiment: the main and auxiliary transmission gear area has four main transmission gears and three auxiliary transmission gears, with 24 forward gears in forward mode and 12 reverse gears in reverse mode.

[0012] As a preferred embodiment, a continuous hydraulic output interface is provided between the power shift zone and the main and auxiliary transmission shift zone, which can provide power to an external hydraulic pump and hydraulic motor.

[0013] A tractor employs the aforementioned three-shaft power reversing and high / low power transmission system.

[0014] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are:

[0015] 1. The present invention uses a wet clutch control for switching between forward and reverse gears, that is, it adopts a power reversing structure, which makes gear shifting easy, quick and comfortable.

[0016] 2. The present invention uses a wet clutch control for switching between forward low gear and forward high gear, that is, it adopts a power high and low structure. There is no need to cut off the power during the gear shifting process, which can effectively reduce the number of control levers and make gear shifting easy, quick and comfortable.

[0017] 3. In forward mode, both high and low gears are selectable. The main transmission has 4 variable gears, and the auxiliary transmission has 3 variable gears, resulting in 24 forward gears. In reverse mode, the main transmission has 4 variable gears, and the auxiliary transmission has 3 variable gears, resulting in 12 reverse gears. The large number of selectable gears and operating speeds caters to various working conditions.

[0018] 4. The present invention directly borrows the high and low gear drive gears for forward gears, which can effectively reduce two gears. The C gear drive gear directly borrows the first gear driven gear, which can effectively reduce one gear. Therefore, compared with the two-shaft transmission system, the present invention can reduce three gears, reduce the manufacturing cost of the transmission system, reduce the weight of the transmission system, and improve the reliability of the transmission system.

[0019] 3. In this invention, the forward gear directly utilizes the high and low gear drive gears, eliminating the need for a forward gear. Compared to a two-shaft transmission system, this reduces the length of the forward gear in terms of wheelbase. The main and auxiliary transmission shift areas of this invention adopt a three-shaft arrangement structure. Compared to a two-shaft transmission system, this spatially moves the auxiliary transmission gear position from behind the main transmission to a position radially parallel to the main transmission, effectively reducing the axial length of the main and auxiliary transmission gears.

[0020] 4. A continuous hydraulic output interface is added to the side of the transmission system to provide power for external hydraulic pumps, hydraulic motors, etc.

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] The diagram is labeled with the following numbers: 1. Front power output shaft; 2. Input shaft; 3. Output shaft; 4. Main transmission input shaft; 5. Intermediate shaft; 6. Rear power output shaft; 7. Small bevel gear shaft; 8. Reverse idler gear shaft; Z1. Reverse drive gear; Z2. Reverse idler gear; Z3. Reverse driven gear; Z4. Low gear drive gear; Z5. Low gear driven gear; Z6. High gear drive gear; Z7. High gear driven gear; Z8. First gear drive gear; Z9. First gear driven gear; Z10. Second gear drive gear; Z11. Second gear driven gear; Z1 2. Third-gear drive gear; Z13. Third-gear driven gear; Z14. Fourth-gear drive gear; Z15. Fourth-gear driven gear; Z16. A-gear drive gear; Z17. A-gear driven gear; Z18. B-gear drive gear; Z19. B-gear driven gear; Z20. C-gear driven gear; Z21. Small bevel gear; Z22. Hydraulic output drive gear; Z23. Hydraulic output idler gear; Z24. Hydraulic output driven gear; Z25. Transfer case gear; A. Reverse wet clutch; B. Low-gear wet clutch; C. High-gear wet clutch. Attached Figure Description

[0023] Appendix Figure 1This is a structural diagram of the three-axis power shift transmission system of this utility model.

[0024] Appendix Figure 2 This utility model is a three-axis arrangement structure for the main and auxiliary gear shift areas. Detailed Implementation

[0025] Example: As attached Figure 1 and attached Figure 2 As shown, a three-axis power reversing and high / low power transmission system includes a power shifting zone, a main and auxiliary gear shifting zone, a drive shaft system, a gear system, and a clutch system. The drive shaft system includes a power output front shaft 1, an input shaft 2, an output shaft 3, a main gear input shaft 42, an intermediate shaft 5, a power output rear shaft 6, a small bevel gear Z21 shaft 7, and a reverse idler gear Z2 shaft 8.

[0026] The gear system includes a reverse drive gear Z1, a reverse idler gear Z2, a reverse driven gear Z3, a low-gear drive gear Z4, a low-gear driven gear Z5, a high-gear drive gear Z6, a high-gear driven gear Z7, a first-gear drive gear Z8, a first-gear driven gear Z9, a second-gear drive gear Z10, a second-gear driven gear Z11, a third-gear drive gear Z12, a third-gear driven gear Z13, a fourth-gear drive gear Z14, a fourth-gear driven gear Z15, an A-gear drive gear Z16, an A-gear driven gear Z17, a B-gear drive gear Z18, a B-gear driven gear Z19, a C-gear driven gear Z20, a small bevel gear Z21, a hydraulic output drive gear Z22, a hydraulic output idler gear Z23, a hydraulic output driven gear Z24, and a transfer case gear Z25.

[0027] The clutch system includes: a reverse wet clutch A, a low-gear wet clutch B, and a high-gear wet clutch B.

[0028] The power shift area includes two parts: power reversing and power high / low. The power shift area has one reverse wet clutch and two forward wet clutches from front to back. The two forward wet clutches include one high-gear clutch and one low-gear clutch. The main and auxiliary transmission area has four main transmission gears and three auxiliary transmission gears. The power shift area is used to switch between reverse, low forward, and high forward gears. The reverse gear adopts a three-shaft arrangement structure.

[0029] The reverse gear adds a reverse idler gear Z2 shaft 8, and the forward gears directly use the high-gear wet clutch B and the low-gear wet clutch B to transmit power. The main and auxiliary transmission shifting area adopts a three-shaft arrangement structure. The main transmission input shaft 42, the intermediate shaft 5 and the small bevel gear Z21 shaft 7 are arranged in a triangular spatial distribution. Power is transmitted from the main transmission input shaft 42 to the small bevel gear Z21 shaft 7 via the intermediate shaft 5. The main transmission first, second, third and fourth gears are switched between the main transmission input shaft 42 and the intermediate shaft 5, and the auxiliary transmission A, B and C gears are switched between the intermediate shaft 5 and the small bevel gear Z21 shaft 7. When in C gear, the first gear driven gear Z8 is used as the C gear driving gear.

[0030] The main transmission input shaft 42, intermediate shaft 5, and small bevel gear Z21 shaft 7 achieve gear switching through the engagement of synchronizer and meshing sleeve, and power transmission is achieved through spline sleeve.

[0031] The reverse drive gear Z1, low gear drive gear Z4, and high gear drive gear Z6 are loosely mounted on the input shaft 2 via deep groove ball bearings; the first gear drive gear Z8, second gear drive gear Z10, third gear drive gear Z12, and fourth gear drive gear Z14 are loosely mounted on the main transmission input shaft 42 via needle roller bearings; the A gear driven gear Z17, B gear driven gear Z19, and C gear driven gear Z20 are loosely mounted on the small bevel gear Z21 shaft 7 via needle roller bearings.

[0032] The main and auxiliary transmission area has four main transmission gears and three auxiliary transmission gears, with 24 forward gears in forward mode and 12 reverse gears in reverse mode.

[0033] A continuous hydraulic output interface is provided between the power shift zone and the main and auxiliary transmission shift zone, which can provide power to an external hydraulic pump and hydraulic motor.

[0034] This application has 2×4×3 (24 in total) forward gears in forward gear mode and 1×4×3 (12 in total) reverse gears in reverse gear mode; the specific implementation method is as follows:

[0035] Forward gear 1 (low-1-A): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - first gear drive gear Z8 - first gear driven gear Z9 - intermediate shaft 5 - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0036] Forward Gear 2 (Low-1-B): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - first gear drive gear Z8 - first gear driven gear Z9 - intermediate shaft - B gear drive gear Z18 - B gear driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0037] Forward gear 3 (low-1-C): Power is supplied by engine-torsional damper-input shaft 2-low gear wet clutch B-low gear drive gear Z4-low gear driven gear Z5-output shaft 3-spline sleeve-main transmission input shaft 4-synchronizer-first gear drive gear Z8-first gear driven gear Z9-C gear driven gear Z20-meshing sleeve-small bevel gear shaft 7-small bevel gear Z21-rear wheel.

[0038] Forward gear 4 (low-2-A): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - second gear drive gear Z10 - second gear driven gear Z11 - intermediate shaft - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0039] Forward gear 5 (low-2-B): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - second gear drive gear Z10 - second gear driven gear Z11 - intermediate shaft - B gear drive gear Z18 - B gear driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0040] Forward gear 6 (low-2-C): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - second gear drive gear Z10 - second gear driven gear Z11 - first gear driven gear Z9 - C gear driven gear Z20 - meshing sleeve - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0041] Forward gear 7 (low-3-A): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - third gear drive gear Z12 - third gear driven gear Z13 - intermediate shaft - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0042] Forward gear 8 (low-3-B): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - third gear drive gear Z12 - third gear driven gear Z13 - intermediate shaft - B gear drive gear Z18 - B gear driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0043] Forward gear 9 (low-3-C): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - third gear drive gear Z12 - third gear driven gear Z13 - first gear driven gear Z9 - C gear driven gear Z20 - meshing sleeve - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0044] Forward gear 10 (low-4-A): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - fourth gear drive gear Z14 - fourth gear driven gear Z15 - intermediate shaft - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0045] Forward gear 11 (low-4-B): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - fourth gear drive gear Z14 - fourth gear driven gear Z15 - intermediate shaft - B gear drive gear Z18 - B gear driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0046] Forward gear 12 (low-4-C): Power is supplied by engine - torsional damper - input shaft 2 - low gear wet clutch B - low gear drive gear Z4 - low gear driven gear Z5 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - fourth gear drive gear Z14 - fourth gear driven gear Z15 - first gear driven gear Z9 - C gear driven gear Z20 - meshing sleeve - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0047] Forward gear 13 (High-1-A): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - first gear drive gear Z8 - first gear driven gear Z9 - intermediate shaft 5 - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0048] Forward gear 14 (High-1-B): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - first gear drive gear Z8 - first gear driven gear Z9 - intermediate shaft - B gear drive gear Z18 - B gear driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0049] Forward gear 15 (High-1-C): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - first gear drive gear Z8 - first gear driven gear Z9 - C gear driven gear Z20 - meshing sleeve - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0050] Forward gear 16 (High-2-A): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - second gear drive gear Z10 - second gear driven gear Z11 - intermediate shaft - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0051] Forward gear 17 (High-2-B): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - second gear drive gear Z10 - second gear driven gear Z11 - intermediate shaft - B gear drive gear Z18 - B gear driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0052] Forward gear 18 (High-2-C): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - second gear drive gear Z10 - second gear driven gear Z11 - first gear driven gear Z9 - C gear driven gear Z20 - meshing sleeve - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0053] Forward gear 19 (High-3-A): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - third-speed drive gear Z12 - third-speed driven gear Z13 - intermediate shaft - A-speed drive gear Z16 - A-speed driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0054] Forward gear 20 (High-3-B): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - third-speed drive gear Z12 - third-speed driven gear Z13 - intermediate shaft - B-speed drive gear Z18 - B-speed driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0055] Forward gear 21 (High-3-C): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - third-speed drive gear Z12 - third-speed driven gear Z13 - first-speed driven gear Z9 - C-speed driven gear Z20 - meshing sleeve - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0056] Forward gear 22 (High-4-A): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - fourth-speed drive gear Z14 - fourth-speed driven gear Z15 - intermediate shaft - A-speed drive gear Z16 - A-speed driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0057] Forward gear 23 (High-4-B): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - fourth-speed drive gear Z14 - fourth-speed driven gear Z15 - intermediate shaft - B-speed drive gear Z18 - B-speed driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0058] Forward gear 24 (High-4-C): Power is supplied by engine - torsional damper - input shaft 2 - high-end wet clutch C - high-end drive gear Z6 - high-end driven gear Z7 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - fourth gear drive gear Z14 - fourth gear driven gear Z15 - first gear driven gear Z9 - C gear driven gear Z20 - meshing sleeve - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0059] Reverse 1 (Reverse-1-A): Power is supplied by engine - torsional damper - input shaft 2 - reverse wet clutch A - reverse drive gear Z1 - reverse idler gear Z2 - reverse driven gear Z3 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - first gear drive gear Z8 - first gear driven gear Z9 - intermediate shaft 5 - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0060] Reverse 2 (Reverse-1-B): Power is supplied by engine - torsional damper - input shaft 2 - reverse wet clutch A - reverse drive gear Z1 - reverse idler gear Z2 - reverse driven gear Z3 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - first gear drive gear Z8 - first gear driven gear Z9 - intermediate shaft - B gear drive gear Z18 - B gear driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0061] Reverse 3 (Reverse-1-C): Power is supplied by engine - torsional damper - input shaft 2 - reverse wet clutch A - reverse drive gear Z1 - reverse idler gear Z2 - reverse driven gear Z3 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - first gear drive gear Z8 - first gear driven gear Z9 - C gear driven gear Z20 - meshing sleeve - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0062] Reverse 4 (Reverse-2-A): Power is supplied by engine - torsional damper - input shaft 2 - reverse wet clutch A - reverse drive gear Z1 - reverse idler gear Z2 - reverse driven gear Z3 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - second gear drive gear Z10 - second gear driven gear Z11 - intermediate shaft - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0063] Reverse 5 (Reverse-2-B): Power comes from the engine - torsional damper - input shaft 2 - reverse wet clutch A - reverse drive gear Z1 - reverse idler gear Z2 - reverse driven gear Z3 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - second gear drive gear Z10 - second gear driven gear Z11 - intermediate shaft - B gear drive gear Z18 - B gear driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0064] Reverse Gear 6 (Reverse-2-C): Power is supplied by engine-torsional damper-input shaft 2-reverse wet clutch A-reverse drive gear Z1-reverse idler gear Z2-reverse driven gear Z3-output shaft 3-spline sleeve-main transmission input shaft 4-synchronizer-second drive gear Z10-second driven gear Z11-first driven gear Z9-C driven gear Z20-meshing sleeve-small bevel gear shaft 7-small bevel gear Z21-rear wheel.

[0065] Reverse Gear 7 (Reverse-3-A): Power is supplied by engine - torsional damper - input shaft 2 - reverse wet clutch A - reverse drive gear Z1 - reverse idler gear Z2 - reverse driven gear Z3 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - third gear drive gear Z12 - third gear driven gear Z13 - intermediate shaft - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0066] Reverse Gear 8 (Reverse-3-B): Power is supplied by engine - torsional damper - input shaft 2 - reverse wet clutch A - reverse drive gear Z1 - reverse idler gear Z2 - reverse driven gear Z3 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - third gear drive gear Z12 - third gear driven gear Z13 - intermediate shaft - B gear drive gear Z18 - B gear driven gear Z19 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0067] Reverse 9 (Reverse-3-C): Power comes from the engine - torsional damper - input shaft 2 - reverse wet clutch A - reverse drive gear Z1 - reverse idler gear Z2 - reverse driven gear Z3 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - third gear drive gear Z12 - third gear driven gear Z13 - first gear driven gear Z9 - C gear driven gear Z20 - meshing sleeve - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0068] Reverse 10 (Reverse-4-A): Power is supplied by engine - torsional damper - input shaft 2 - reverse wet clutch A - reverse drive gear Z1 - reverse idler gear Z2 - reverse driven gear Z3 - output shaft 3 - spline sleeve - main transmission input shaft 4 - synchronizer - fourth gear drive gear Z14 - fourth gear driven gear Z15 - intermediate shaft - A gear drive gear Z16 - A gear driven gear Z17 - synchronizer - small bevel gear shaft 7 - small bevel gear Z21 - rear wheel.

[0069] Reverse gear 11 (Reverse-4-B): Power is supplied by engine-torsional damper-input shaft 2-reverse wet clutch A-reverse drive gear Z1-reverse idler gear Z2-reverse driven gear Z3-output shaft 3-spline sleeve-main transmission input shaft 4-synchronizer-fourth gear drive gear Z14-fourth gear driven gear Z15-intermediate shaft-B gear drive gear Z18-B gear driven gear Z19-synchronizer-small bevel gear shaft 7-small bevel gear Z21-rear wheel.

[0070] Reverse 12 (Reverse-4-C): Power is supplied by engine-torsional damper-input shaft 2-reverse wet clutch A-reverse drive gear Z1-reverse idler gear Z2-reverse driven gear Z3-output shaft 3-spline sleeve-main transmission input shaft 4-synchronizer-fourth gear drive gear Z14-fourth gear driven gear Z15-first gear driven gear Z9-C gear driven gear Z20-meshing sleeve-small bevel gear shaft 7-small bevel gear Z21-rear wheel.

[0071] The power supply is provided to the agricultural implements via the engine, input shaft 2, spline sleeve, front power output shaft 1, spline sleeve, rear power output shaft 6, and agricultural implements.

[0072] The power source is the engine - input shaft 2 - spline sleeve - power output front shaft 1 - hydraulic output drive gear Z22 - hydraulic output idler gear Z23 - hydraulic output driven gear Z24 - hydraulic pump, which can provide power for external hydraulic pumps, hydraulic motors, etc.

[0073] A tractor employs the aforementioned three-shaft power reversing and high / low power transmission system. Tractors belong to the prior art, and their structure and components will not be described in detail.

Claims

1. A three-axis power reversing and high / low power transmission system, characterized in that: It includes a power shift area, a main and auxiliary gear shift area, a drive shaft system, a gear system, and a clutch system. The drive shaft system includes a power output front shaft, an input shaft, an output shaft, a main gear input shaft, an intermediate shaft, a power output rear shaft, a small bevel gear shaft, and a reverse idler gear shaft. The gear system includes a reverse drive gear, a reverse idler gear, a reverse driven gear, a low-gear drive gear, a low-gear driven gear, a high-gear drive gear, a high-gear driven gear, a first-gear drive gear, a first-gear driven gear, a second-gear drive gear, a second-gear driven gear, a third-gear drive gear, a third-gear driven gear, a fourth-gear drive gear, a fourth-gear driven gear, an A-gear drive gear, an A-gear driven gear, a B-gear drive gear, a B-gear driven gear, a C-gear driven gear, a small bevel gear, a hydraulic output drive gear, a hydraulic output idler gear, a hydraulic output driven gear, and a transfer case gear. The clutch system includes: a reverse wet clutch, a low-gear wet clutch, and a high-gear wet clutch. The power shift area includes two parts: power reversing and power high / low. The power shift area has one reverse wet clutch and two forward wet clutches from front to back. The two forward wet clutches include one high-gear clutch and one low-gear clutch. The main and auxiliary transmission area has four main transmission gears and three auxiliary transmission gears. The power shift area is used to switch between reverse gear, low forward gear, and high forward gear. The reverse gear adopts a three-shaft arrangement structure. The reverse gear adds a reverse idler shaft, and the forward gears directly use the high-gear wet clutch and the low-gear wet clutch to transmit power. The main and auxiliary transmission shifting areas adopt a three-shaft arrangement structure, with the main transmission input shaft, intermediate shaft, and small bevel gear shaft arranged in a triangular spatial distribution. Power is transmitted from the main transmission input shaft to the small bevel gear shaft via the intermediate shaft. The main transmission shifts between first, second, third, and fourth gears between the main transmission input shaft and the intermediate shaft, and between the intermediate shaft and the small bevel gear shaft, the auxiliary transmission shifts between gears A, B, and C. When in gear C, the first gear driven gear is used as the C gear driving gear.

2. The three-axis power reversing and high / low power transmission system according to claim 1, characterized in that: The main transmission input shaft, intermediate shaft, and small bevel gear shaft achieve gear switching through the engagement of a synchronizer and a meshing sleeve, and power transmission is achieved through a spline sleeve.

3. The three-axis power reversing and high / low power transmission system according to claim 2, characterized in that: The reverse drive gear, low gear drive gear, and high gear drive gear are loosely mounted on the input shaft via deep groove ball bearings; the first gear drive gear, second gear drive gear, third gear drive gear, and fourth gear drive gear are loosely mounted on the main transmission input shaft via needle roller bearings; the A gear driven gear, B gear driven gear, and C gear driven gear are loosely mounted on the small bevel gear shaft via needle roller bearings.

4. A three-axis power reversing and high / low power transmission system according to claim 3, characterized in that: The main and auxiliary transmission area has four main transmission gears and three auxiliary transmission gears, with 24 forward gears in forward mode and 12 reverse gears in reverse mode.

5. A three-axis power reversing and high / low power transmission system according to any one of claims 1 to 4, characterized in that: A continuous hydraulic output interface is provided between the power shift zone and the main and auxiliary transmission shift zone, which can provide power to an external hydraulic pump and hydraulic motor.

6. A tractor, characterized in that: The three-axis power reversing and high / low power transmission system described in claim 1 is adopted.

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