Tractor control system based on section hydraulic stepless speed change

Abstract

The invention relates to the field of tractor control systems, in particular to a tractor control system based on section hydraulic stepless speed change, which comprises an engine, a power unit module, a planetary hybrid module, a mechanical speed change module, a PTO (power take-off) output module and a front axle and rear axle module, the power unit module is connected with the planetary hybrid module, the planetary hybrid module is connected with the mechanical speed change module, and the problems that although the number of gears of power gear shifting is reduced, the design and control difficulty of coupling of a high-pressure and efficient hydraulic transmission system and a planetary mechanism is large, and domestic technologies are lacked in an existing liquid-mixing stepless speed change system are solved.

Description

Technical Field

[0001] The invention relates to the field of tractor control systems, in particular to a tractor control system based on section hydraulic continuously variable speed change. Background Art

[0002] The operating conditions of tractors are complex and diverse, and the corresponding operating speeds and traction loads are also diverse and complex. During operation, the tractor needs to frequently change the speed ratio of the gearbox by shifting gears to keep the engine in a relatively economical and efficient working state. Therefore, the forward and reverse gears of the gearbox of tractor products are usually more than 10, and some gearboxes even have about 40 gears.

[0003] At present, my country's tractor products basically use the engine + mechanical stepped gearbox to achieve the output of traction power. The gearbox of tractors in the world uses a power shift box and a continuously variable speed shift box based on the mechanical stepped gearbox. The product has a high degree of automation and can effectively reduce the workload of operators. At the same time, it realizes automatic optimal operation through strategic automatic shifting and speed change.

[0004] Since the wet clutch of the power-shift tractor has harsh operating conditions, there are many wet clutches, the shift control strategy is complex, and the hydraulic control system has high and complex precision requirements, the gearbox design, control and manufacturing are complicated. Although the liquid-hybrid continuously variable transmission system reduces the number of gears for power shifting, the design and control of the high-pressure and efficient hydraulic transmission system and planetary mechanism coupling are difficult. my country is currently only in the prototype production and initial market promotion stage. There is a shortage of mature applications and market-oriented products, and such products on the market are basically imported equipment. Summary of the invention

[0005] The object of the present invention is to provide a tractor control system based on section hydraulic continuously variable speed change to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: The invention comprises a transmission speed change system, wherein the transmission speed change system comprises an engine, a power unit module, a planetary hybrid module, a PTO output module and a front axle and a rear axle module. The output end of the engine is connected to a first output shaft, on which a 102 gear is arranged. The power unit module comprises a first power source and a second power source. The planetary hybrid module is provided with a PTO power output hybrid clutch and a planetary hybrid structure. The first power source drives the PTO power output hybrid clutch, and the second power source drives the planetary hybrid structure. A 206 gear is arranged on the output shaft of the planetary hybrid structure. The PTO power output hybrid clutch is provided with a third output shaft, on which a 207 gear is arranged. The 207 gear and the The 206 gear is meshed with each other, the PTO output module is arranged at the other end of the third output shaft, the mechanical speed change module includes a PTO output and a fourth output shaft, the fourth output shaft is connected to the main drive axle, and 301 gears, 303 gears, 305 gears and 307 gears are arranged on the third output shaft between the PTO power output hybrid clutch and the PTO output, 302 gears, 304 gears, 306 gears and 308 gears are arranged on the fourth output shaft, the 302 gear is meshed with the 301 gear, the 304 gear is meshed with the 303 gear, the 306 gear is meshed with the 305 gear, the 308 gear is meshed with the 307 gear, and the front axle and rear axle modules are arranged on the main drive axle.

[0007] It is further defined that the first power source is a hydraulic pump or a first motor, the second power source is a hydraulic motor or a second motor, the output end of the first power source is provided with a 101 gear, the engine is connected to the PTO power output hybrid clutch through a first output shaft, the 102 gear is meshed with the 101 gear, the output end of the second power source is provided with a 103 gear, and also includes a second output shaft, the second output shaft is connected to the planetary gear hybrid structure, the second output shaft is provided with a 104 gear, and the 104 gear is meshed with the 103 gear.

[0008] It is further defined that the planetary gear hybrid structure includes a 205 sun gear, a 203 gear ring and a 204 planet carrier, a 202 gear is arranged on the outer side of the 203 gear ring, the planetary gears on the 204 planet carrier are meshed with the 205 sun gear and the internal gear of the 203 gear ring at the same time, a 201 gear is installed on the first output shaft located between the PTO power output hybrid clutch and the 102 gear, the 201 gear is meshed with the 202 gear, the 205 sun gear is connected to the second output shaft, and a 206 gear is arranged on the output shaft of the 204 planet carrier.

[0009] It is further defined that the planetary gear hybrid structure includes a 205 sun gear, a 203 gear ring and a 204 planet carrier, the second output shaft is connected to the 205 sun gear, the 204 planet carrier is provided with a 2021 gear, the first output shaft located between the PTO power output hybrid clutch and the 102 gear is installed with a 201 gear, the 2021 gear is meshed with the 201 gear, the 205 sun gear is meshed with the planetary gear on the 204 planet carrier, the planetary gear is also meshed with the internal gear of the 203 gear ring, the 203 gear ring is provided with an output shaft, and the output shaft is provided with a 206 gear.

[0010] It is further defined that the engine is connected to the first power source, the first power source is connected to the PTO power output hybrid clutch through a first output shaft, and the second power source is connected to the planetary gear hybrid structure through a second output shaft.

[0011] It is further defined that a mechanical reversing module is also included, the mechanical reversing module includes a gear 209 and a gear 210, a gear 208 is arranged on the third output shaft next to the gear 207, the gear 209 is installed on the second output shaft, and the gear 209 is meshed with the gear 208 and the gear 207 respectively.

[0012] It is further defined that the front axle and rear axle module includes a front drive transfer block and a rear axle drive block, the front drive transfer block includes a front drive axle and a 501 gear installed on the front drive axle, 502 gears and 602 gears are installed on the main drive axle, the 501 gears are meshed with the 502 gears, the rear axle drive block includes drive wheels on both sides and a rear drive axle, a 601 gear is arranged on the rear drive axle, and the 601 gears are meshed with the 602 gears.

[0013] It is further defined that the front axle and rear axle module includes a rear axle drive block, the rear axle drive block includes drive wheels on both sides, a rear drive axle and planetary reduction bridges on both sides, 404 ring gears and 406 ring gears are respectively provided on the planetary reduction bridges on both sides, and also includes an active differential steering module, the active differential steering module includes a differential pump and a differential motor, the differential pump is connected to the differential motor, a 401 gear is provided on the differential pump, the 401 gear is meshed with the 102 gear, a 402 gear is provided at the driving end of the differential motor, the 402 gear and the 404 ring gear are meshed through a 403 gear, a transmission rod is sleeved on the inner hole of the 402 gear, and a 405 gear is provided at the other end of the transmission rod, and the 405 gear is meshed with the 406 gear.

[0014] It is further limited that it also includes an external battery, and the external battery is connected to the first power source and the second power source respectively.

[0015] The beneficial effects of adopting the above technical solution are: 1. Through modular combination, the electric and hydraulic modules can be interchanged to realize the liquid-hybrid continuously variable speed change and electric-hybrid continuously variable speed change functions. Through the setting of the continuously variable speed change module, the setting of the mechanical speed change structure can be effectively reduced, the engine efficiency can be improved and the fuel consumption can be reduced.

[0016] 2. By increasing or decreasing the modularity of the drive differential system, the switch between wheeled tractor products and crawler tractor products can be realized, thus expanding the product application range.

[0017] 3. A single planetary system is adopted. Different hydraulic, electric power take-off modules and drive modules are arranged at the three ports of the single planetary system: the sun, planet carrier and ring gear. The engine mechanical power is converted into hydraulic power and electric power. The hydraulic stepless or electric stepless system is used to realize the stepless speed regulation function of the entire transmission system.

[0018] 4. An external power supply is provided to meet the demand for high-power power input to external operating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the A-1 configuration diagram of the hybrid transmission of the present invention; Figure 2 is the A-2 configuration diagram of the hybrid transmission of the present invention; Figure 3 is the B-1 configuration diagram of the hybrid transmission of the present invention; Figure 4 is the B-2 configuration diagram of the hybrid transmission of the present invention; Figure 5 is the A-1-1 configuration diagram of the hybrid transmission of the present invention; Figure 6 is the B-1-1 configuration diagram of the hybrid transmission of the present invention; Figure 7 is the B-1-2 configuration diagram of the hybrid transmission of the present invention; Figure 8 It is a schematic diagram of the A-2 configuration diagram of the hybrid transmission in the present invention plus an external battery.

[0020] Explanation of the accompanying drawings: 1-engine, 2-first power source, 3-second power source, 4-PTO power output hybrid clutch, 5-first output shaft, 6-second output shaft, 7-third output shaft, 8-PTO output, 9-fourth output shaft, 10-main drive axle, 11-front drive transfer block, 111-front drive axle, 12-rear axle drive block, 121-drive wheel, 122-rear drive axle, 123-planetary side reduction axle, 124-active differential steering module, 125-differential pump, 126-differential motor, 127-external battery. DETAILED DESCRIPTION

[0021] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0022] like Figure 1As shown, a tractor control system based on section hydraulic continuously variable transmission includes a transmission transmission system, which includes an engine, a power unit module, a planetary hybrid module and a mechanical transmission module. The power unit module is divided into a first power source 2 and a second power source 3. The first power source 2 and the second power source 3 are respectively a first motor and a second motor. The planetary hybrid module is provided with a PTO power output hybrid clutch 4 and a planetary gear hybrid structure. The engine 1 is connected to the PTO power output hybrid clutch 4 through a first output shaft 5. The shaft 5 is provided with a 102 gear, the output end of the first motor is provided with a 101 gear, the 102 gear and the 101 gear are meshed, the output end of the second motor is provided with a 103 gear, and also includes a second output shaft 6, the second output shaft 6 is provided with a 104 gear, the 104 gear and the 103 gear are meshed, the planetary gear hybrid structure includes a 205 sun gear, a 203 gear ring and a 204 planetary carrier, a 202 gear is provided on the outside of the 203 gear ring, and the planetary gears on the 204 planetary carrier are simultaneously in contact with the 205 sun gear and the 203 gear ring. The internal gears are meshed, a 201 gear is installed on the first output shaft 5 located between the PTO power output hybrid clutch 4 and the 102 gear, the 201 gear is meshed with the 202 gear, the 205 sun gear is connected to the second output shaft 6, a 206 gear is arranged on the output shaft of the 204 planetary carrier, the PTO power output hybrid clutch 4 is provided with a third output shaft 7, a 207 gear is arranged on the third output shaft 7, the 207 gear is meshed with the 206 gear, the mechanical speed change module also includes a PTO output 8 and a fourth output shaft 9, the fourth output The output shaft 9 is connected to the main drive axle 10, the PTO output 8 is connected to the third output shaft 7, and the third output shaft 7 between the PTO power output hybrid clutch 4 and the PTO output 8 is provided with a 301 gear, a 303 gear, a 305 gear and a 307 gear. The fourth output shaft 9 is provided with a 302 gear, a 304 gear, a 306 gear and a 308 gear. The 302 gear is meshed with the 301 gear, the 304 gear is meshed with the 303 gear, the 306 gear is meshed with the 305 gear, and the 308 gear is meshed with the 307 gear. The engine 1 is connected to the 102 gear through the first output shaft 5, the 102 gear is meshed with the 101 gear, the first motor is connected to the 101 gear to achieve electric drive force take-off, the second motor is connected to the planetary hybrid system 205 sun gear through the 103 gear and the 104 gear to achieve hybrid power input, and at the same time, the 203 gear ring is meshed through the 201 gear on the first output shaft 5 and the 202 gear on the 203 gear ring to achieve engine power input, the 204 planetary carrier is meshed with the 207 gear on the third output shaft 7 through the 206 gear, and the hybrid power is output in stages on the fourth output shaft 9 through the combination and switching of the four sets of gears on the fourth output shaft 9 that are meshed with each other, the engine 1 is directly connected to the input end of the PTO power output hybrid clutch 4 to achieve lossless PTO output, and the PTO power on and off is controlled by the PTO power output hybrid clutch 4. Example 2

[0023] The difference between Example 2 and Example 1 is that the first power source 2 and the second power source 3 in Example 1 are respectively the first motor and the second motor, which adopt an electric continuously variable transmission module, while the first power source 2 and the second power source 3 in Example 2 are respectively a hydraulic pump and a hydraulic motor, which adopt a hydraulic continuously variable module. Example 3

[0024] like Figure 2 As shown, the difference between Example 3 and Example 1 is that: in Example 1, a gear 202 is provided on the outer side of the 203 gear ring, and the planetary gears on the 204 planet carrier are meshed with the 205 sun gear and the internal gear of the 03 gear ring at the same time, and a gear 201 is installed on the first output shaft 5 located between the PTO power output hybrid clutch 4 and the 102 gear, and the 201 gear is meshed with the 202 gear, and the 205 sun gear is connected to the second output shaft 6, and in Example 3, a gear 2021 is provided on the 204 planet carrier, and a gear 201 is installed on the first output shaft 5 located between the PTO power output hybrid clutch 4 and the 102 gear, and the 2021 gear is meshed with the 201 gear, and the 205 sun gear is meshed with the planetary gears on the 204 planet carrier, and the planetary gears are meshed with the internal gear of the 203 gear ring at the same time, and an output shaft is provided on the 203 gear ring, and a gear 206 is provided on the output shaft.

[0025] The engine 1 is connected to the 102 gear through the first output shaft 5, the 102 gear is meshed with the 101 gear, the first motor is connected to the 101 gear to achieve electric drive force take-off, the second motor is connected to the planetary hybrid system 205 sun gear through the 103 gear and the 104 gear to achieve hybrid power input, and at the same time, the 204 planetary carrier is meshed with the 201 gear on the first output shaft 5 and the 2021 gear on the 204 planetary carrier to achieve power input to the engine 1, the 203 gear ring is meshed with the 207 gear on the third output shaft 7 through the 206 gear, and the hybrid power is output in stages on the fourth output shaft 9 through the combination and switching of the four sets of gears on the fourth output shaft 9 that are meshed with each other, the engine 1 is directly connected to the input end of the PTO power output hybrid clutch 4 to achieve lossless PTO output, and the PTO power is controlled by the PTO power output hybrid clutch 4. Example 4

[0026] The difference between Example 4 and Example 3 is that the first power source 2 and the second power source 3 in Example 3 are respectively the first motor and the second motor, which adopt an electric continuously variable transmission module, while the first power source and the second power source in Example 4 are respectively a hydraulic pump and a hydraulic motor, which adopt a hydraulic continuously variable module.

[0027] Embodiment 1 and Embodiment 2 are two embodiments of the A-1 configuration diagram of the hybrid transmission, and Embodiment 3 and Embodiment 4 are the A-2 configuration diagram of the hybrid transmission. The difference between the A-1 configuration diagram and the A-2 configuration diagram mainly lies in the change of the planetary gear hybrid structure. Example 5

[0028] like Figure 3As shown, a tractor control system based on section hydraulic continuously variable transmission includes a transmission transmission system, the transmission transmission system includes an engine, a power unit module, a planetary hybrid module and a mechanical transmission module, the power unit module is divided into a first power source 2 and a second power source 3, the first power source 2 and the second power source 3 are respectively a first motor and a second motor, the planetary hybrid module is provided with a PTO power output hybrid clutch 4 and a planetary hybrid structure, the engine 1 is connected to the first motor, the first motor and the PTO power output hybrid clutch 4 are connected through a first output shaft 5, a 102 gear is provided on the first output shaft 5, a 201 gear is installed on the first output shaft 5 located between the PTO power output hybrid clutch 4 and the 102 gear, the planetary hybrid structure includes a 205 sun gear, a 203 gear ring and a 204 planet carrier, a 202 gear is provided on the outer side of the 203 gear ring, the planetary gears on the 204 planet carrier are meshed with the inner gears of the 205 sun gear and the 203 gear ring at the same time, and the 201 gear The gear 202 is meshed with the gear 205, the sun gear 205 is connected to the second motor through the second output shaft, the output shaft of the planetary carrier 204 is provided with a gear 206, the PTO power output hybrid clutch 4 is provided with a third output shaft 7, the third output shaft 7 is provided with a gear 207, the gear 207 is meshed with the gear 206, the PTO output module is provided at the other end of the third output shaft 7, the mechanical speed change module includes a PTO output and a fourth output shaft 9, the fourth output shaft 9 is connected to the main drive axle 10, and the PTO output module is provided at the other end of the third output shaft 7. The third output shaft 7 between the TO power output hybrid clutch 4 and the PTO output 8 is provided with gears 301, 303, 305 and 307, and the fourth output shaft 9 is provided with gears 302, 304, 306 and 308. The gear 302 is meshed with the gear 301, the gear 304 is meshed with the gear 303, the gear 306 is meshed with the gear 305, and the gear 308 is meshed with the gear 307. The front axle and rear axle modules are arranged on the main drive axle 10.

[0029] The engine 1 is connected to the first motor to realize electric drive force. The first motor is connected to the PTO power output hybrid clutch 4 through the first output shaft 5. The second motor is connected to the 205 sun gear through the second output shaft to realize hybrid power input. The planetary gear hybrid structure realizes the input of engine power through the meshing of the 202 gear and the 201 gear on the 203 ring gear. The 204 planetary carrier realizes the stepped output of hybrid power on the fourth output shaft 9 through the meshing of the 206 gear and the 207 gear and the combination and switching of the four groups of gears on the third output shaft 7 and the fourth output shaft 9. The engine 1 is directly connected to the input end of the PTO power output hybrid clutch 4 to realize lossless PTO output. The PTO power is controlled by the PTO power output hybrid clutch 4. Example 6

[0030] The difference between Example 6 and Example 5 is that the first power source 2 and the second power source 3 in Example 5 are respectively the first motor and the second motor, which adopt an electric continuously variable transmission module, while the first power source 2 and the second power source 3 in Example 6 are respectively a hydraulic pump and a hydraulic motor, which adopt a hydraulic continuously variable module. Example 7

[0031] like Figure 4 As shown, the difference between Example 7 and Example 5 is that in Example 6, a gear 202 is provided on the outer side of the 203 gear ring, and the planetary gears on the 204 planet carrier are meshed with the 205 sun gear and the internal gear of the 03 gear ring at the same time, and a gear 201 is installed on the first output shaft 5 located between the PTO power output hybrid clutch 4 and the 102 gear, and the 201 gear is meshed with the 202 gear, and the 205 sun gear is connected to the second output shaft 6, and in Example 7, a gear 2021 is provided on the 204 planet carrier, and a gear 201 is installed on the first output shaft 5 located between the PTO power output hybrid clutch 4 and the 102 gear, and the 2021 gear is meshed with the 201 gear, and the 205 sun gear is meshed with the planetary gears on the 204 planet carrier, and the planetary gears are meshed with the internal gear of the 203 gear ring at the same time, and an output shaft is provided on the 203 gear ring, and a gear 206 is provided on the output shaft. Example 8

[0032] The difference between Example 8 and Example 7 is that the first power source 2 and the second power source 3 in Example 8 are respectively the first motor and the second motor, which adopt an electric continuously variable transmission module, while the first power source 2 and the second power source 3 in Example 7 are respectively a hydraulic pump and a hydraulic motor, which adopt a hydraulic continuously variable module.

[0033] Embodiment 5 and embodiment 6 are two embodiments of the B-1 configuration diagram of the hybrid transmission, and embodiment 7 and embodiment 8 are the B-2 configuration diagram of the hybrid transmission. The difference between the B-1 configuration diagram and the B-2 configuration diagram mainly lies in the change of the planetary gear hybrid structure. Example 9

[0034] like Figure 5 As shown, Example 9 is the A-1-1 configuration diagram of the hybrid transmission. The difference between the A-1-1 configuration diagram of the hybrid transmission and the A-1 configuration diagram of the hybrid transmission is that it also includes a mechanical reversing module. The mechanical reversing module includes gears 209 and 210. Gear 208 is arranged on the third output shaft 7 next to gear 207. Gear 209 is installed on the second output shaft 6. Gear 209 is meshed with gears 208 and 207 respectively.

[0035] Embodiment 10: like Figure 6As shown, the difference between the B-1-1 configuration diagram of the hybrid transmission and the configuration diagram of B-1 is that the front axle and rear axle module include a front drive transfer block 11 and a rear axle drive block 12, the front drive transfer block 11 includes a front drive axle 111 and a 501 gear installed on the front drive axle 111, 502 gears and 602 gears are installed on the main drive axle 10, and the 501 gears and 502 gears are meshed, the rear axle drive block 12 includes drive wheels 121 on both sides and a rear drive axle 122, a 601 gear is arranged on the rear drive axle 122, and the 601 gears and 602 gears are meshed, the planetary gear hybrid structure and the mechanical speed change module are directly connected to realize stepless speed change in sections; the front drive transfer block 11 is integrated with the mechanical speed change module, and the mechanical speed change module is directly connected to the rear axle drive block 12.

[0036] Embodiment 11: like Figure 7 As shown, the difference between the B-1-2 configuration diagram and the B-1-1 configuration diagram of the hybrid transmission is that the front axle and rear axle module only includes the rear axle drive block 12, and the rear axle drive block includes drive wheels 121 on both sides, a rear drive axle 122 and planetary reduction bridges 123 on both sides, and 404 ring gears and 406 ring gears are respectively provided on the planetary reduction bridges 123 on both sides, and also includes an active differential steering module 124, and the active differential steering module 124 includes a differential pump 125 and a differential motor 126, and the differential pump 125 is connected to the differential motor 126, and a 401 gear is provided on the differential pump 125, and the 401 gear is meshed with the 102 gear, and a 402 gear is provided at the driving end of the differential motor 126, and the 402 gear and the 404 ring gear are meshed through the 403 gear, and a transmission rod is sleeved on the inner hole of the 402 gear, and a 405 gear is provided on the other end of the transmission rod, and the 405 gear is meshed with the 406 gear.

[0037] The power take-off end of the active differential steering module 124 is connected through the meshing of gear 102 and gear 401, and the drive end is connected to the ring gears of the planetary side reduction bridge 123 on both sides of the rear drive module through gears 402, 403, 404, 405 and 406, respectively, to achieve active differential steering.

[0038] Embodiment 12: like Figure 8 As shown, an external battery 127 is also included. The external battery 127 is connected to the first motor and the second motor respectively. Relying on the planetary gear hybrid structure, the first power source 2 and the second power source 3 are used as drive outputs to realize a pure electric working function. When the engine is in working state, this configuration utilizes the first motor and the second motor to realize a power generation function, and can realize power supply to external agricultural machinery.

[0039] Through modular combination, the electric and hydraulic modules can be interchanged, and the liquid-hybrid stepless speed change and electric-hybrid stepless speed change functions can be realized. Through the setting of the stepless speed change module, the setting of the mechanical speed change structure can be effectively reduced, the engine efficiency can be improved, and the fuel consumption can be reduced. The modularization of the drive differential system through increase and decrease adjustment can realize the switching of wheeled tractor products and crawler tractor products, and improve the application range of the products. The single planetary system is adopted, and different hydraulic, electric power take-off modules and drive modules are arranged at the three ports of the single planetary system, namely the sun, planet carrier and ring gear, to realize the conversion of engine mechanical power into hydraulic power and electricity, and the stepless speed regulation function of the entire transmission system can be realized through the hydraulic stepless or electric stepless system.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention, and therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tractor control system based on section hydraulic continuously variable speed change, characterized in that: The invention comprises a transmission speed change system, wherein the transmission speed change system comprises an engine (1), a power unit module, a planetary hybrid module, a mechanical speed change module, a PTO output module and a front axle and rear axle module. The output end of the engine is connected to a first output shaft (5), and a 102 gear is arranged on the first output shaft (5). The engine is connected to the PTO power output hybrid clutch (4) through the first output shaft (5). The power unit module comprises a first power source (2) and a second power source (3). The planetary hybrid module is provided with a PTO power output hybrid clutch (4) and a planetary hybrid structure. The first power source (2) drives the PTO power output hybrid clutch (4), and the second power source (3) drives the planetary hybrid structure. The output shaft of the planetary hybrid structure is provided with a 206 gear. The PTO power output hybrid clutch (4) is provided with a third output shaft (7). The third The output shaft (7) is provided with a gear 207, the gear 207 is meshed with the gear 206, the PTO output module is provided at the other end of the third output shaft (7), the mechanical speed change module includes a PTO output and a fourth output shaft (9), the fourth output shaft (9) is connected to the main drive axle (10), the third output shaft (7) between the PTO power output hybrid clutch (4) and the PTO output is provided with a gear 301, a gear 303, a gear 305 and a gear 307, the fourth output shaft (9) is provided with a gear 302, a gear 304, a gear 306 and a gear 308, the gear 302 is meshed with the gear 301, the gear 304 is meshed with the gear 303, the gear 306 is meshed with the gear 305, the gear 308 is meshed with the gear 307, and the front axle and rear axle modules are provided on the main drive axle (10).

2. A tractor control system based on section hydraulic continuously variable speed change according to claim 1, characterized in that: The first power source (2) is a hydraulic pump or a first motor, the second power source (3) is a hydraulic motor or a second motor, the output end of the first power source (2) is provided with a 101 gear, the engine (1) is connected to the PTO power output hybrid clutch (4) via a first output shaft (5), the 102 gear is meshed with the 101 gear, the output end of the second power source (2) is provided with a 103 gear, and also includes a second output shaft (6), the second output shaft (6) is connected to the planetary gear hybrid structure, the second output shaft (6) is provided with a 104 gear, the 104 gear is meshed with the 103 gear.

3. A tractor control system based on section hydraulic continuously variable speed change according to claim 2, characterized in that: The planetary gear hybrid structure includes a sun gear 205, a gear ring 203 and a planet carrier 204. A gear 202 is arranged on the outer side of the gear ring 203. The planetary gears on the planet carrier 204 are meshed with the sun gear 205 and the internal gears of the gear ring 203. A gear 201 is installed on the first output shaft (5) located between the PTO power output hybrid clutch (4) and the 102 gear. The gear 201 is meshed with the gear 202. The sun gear 205 is connected to the second output shaft (6). A gear 206 is arranged on the output shaft of the planet carrier 204.

4. A tractor control system based on section hydraulic continuously variable speed change according to claim 2, characterized in that: The planetary gear hybrid structure includes a 205 sun gear, a 203 gear ring and a 204 planet carrier. The second output shaft (6) is connected to the 205 sun gear. The 204 planet carrier is provided with a 2021 gear. The 201 gear is installed on the first output shaft (5) located between the PTO power output hybrid clutch (4) and the 102 gear. The 2021 gear is meshed with the 201 gear. The 205 sun gear is meshed with the planetary gear on the 204 planet carrier. The planetary gear is also meshed with the internal gear of the 203 gear ring. The 203 gear ring is provided with an output shaft, and the output shaft is provided with a 206 gear.

5. A tractor control system based on section hydraulic continuously variable speed change according to claim 1, characterized in that: The engine (1) is connected to the first power source (2), the first power source (2) is connected to the PTO power output hybrid clutch (4) via a first output shaft (5), and the second power source (3) is connected to the planetary gear hybrid structure via a second output shaft (6).

6. A tractor control system based on section hydraulic continuously variable speed change according to claim 3, characterized in that: It also includes a mechanical reversing module, which includes a gear 209 and a gear 210. A gear 208 is arranged on the third output shaft (7) next to the gear 207. The gear 209 is mounted on the second output shaft (6). The gear 209 is meshed with the gear 208 and the gear 207 respectively.

7. A tractor control system based on section hydraulic continuously variable speed change according to claim 5, characterized in that: The front-axle and rear-axle modules include a front drive transfer block (11) and a rear-axle drive block (12); the front drive transfer block includes a front drive axle (111) and a 501 gear mounted on the front drive axle (111); a 502 gear and a 602 gear are mounted on the main drive axle (10); the 501 gear meshes with the 502 gear; the rear-axle drive block (12) includes two side drive wheels (121) and a rear drive axle (122); a 601 gear is arranged on the rear drive axle (122); the 601 gear meshes with the 602 gear.

8. The tractor control system based on section hydraulic continuously variable speed change according to claim 5, characterized in that: The front-axle and rear-axle modules include a rear-axle drive block (12), the rear-axle drive block (12) includes drive wheels on both sides (121), a rear drive axle (122) and planetary reduction bridges (123) on both sides, the planetary reduction bridges (123) on both sides are provided with gear rings 404 and 406 respectively, and also include an active differential steering module (124), the active differential steering module (124) includes a differential pump (125) and a differential motor (126), the differential pump (125) The differential pump (125) is connected to the differential motor (126), and a gear 401 is provided on the differential pump (125), and the gear 401 is meshed with the gear 102. The driving end of the differential motor (126) is provided with a gear 402, and the gear 402 is meshed with the gear ring 404 via a gear 403. The inner hole of the gear 402 is sleeved with a transmission rod, and the other end of the transmission rod is provided with a gear 405, and the gear 405 is meshed with the gear 406.

9. The tractor control system based on section hydraulic continuously variable speed change according to claim 2, characterized in that: It also includes an external battery (127), and the external battery (127) is connected to the first power source (2) and the second power source (3) respectively.

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