Multifunctional electric tractor

Abstract

The invention provides a multifunctional electric tractor which comprises a main drive motor, a rear half shaft, a PTO motor, a first clutch, a rear PTO output shaft, a second clutch, a middle PTO output shaft, a third clutch and a front PTO output shaft. The PTO motor is in transmission connection with the first clutch, the second clutch and the third clutch, the first clutch is in transmission connection with the rear PTO output shaft, the second clutch is in transmission connection with the middle PTO output shaft, and the third clutch is in transmission connection with the front PTO output shaft.

Description

Technical Field

[0001] The invention relates to the technical field of electric tractors, and in particular to a multifunctional electric tractor. Background Art

[0002] Tractors are important tools for production operations. To match a variety of agricultural machinery, they need multiple power output interfaces, the main power output interfaces are the rear PTO power output shaft, the mid-PTO power output shaft and the front PTO power output shaft. Traditional tractors generally achieve the above power output distribution by matching a diesel engine with a gearbox system assembly. Since all the power of the tractor comes from the diesel engine, the tractor's travel and PTO power output are coupled, so different gears need to be switched to meet the power and operating speed requirements of different operating scenarios. The gearbox structure is complex, difficult to manufacture, and costly; at the same time, it is necessary to manually switch the PTO meshing gear to achieve different PTO power outputs, which has a complex structure, poor convenience, and low work efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a multifunctional electric tractor in view of the deficiencies of the prior art.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: A multifunctional electric tractor comprises: a main drive motor, a rear half shaft, a PTO motor, a first clutch, a rear PTO output shaft, a second clutch, a mid-PTO output shaft, a third clutch, and a front PTO output shaft, wherein the main drive motor is drivingly connected to the rear half shaft, the PTO motor is drivingly connected to the first clutch, the second clutch and the third clutch respectively, the first clutch is drivingly connected to the rear PTO output shaft, the second clutch is drivingly connected to the mid-PTO output shaft, and the third clutch is drivingly connected to the front PTO output shaft.

[0005] The beneficial effects of the technical solution of the present invention are as follows: through the technical route of multiple motors with reducers, the coupling problem of walking and PTO power output is solved, and independent control of walking and PTO power output is achieved, achieving power decoupling. At the same time, the PTO motor is equipped with multiple clutches to achieve independent control of the power output of the rear PTO, mid-PTO and front PTO, so as to more flexibly match various agricultural machinery and implements, avoiding frequent manual switching of PTO meshing gears like traditional tractors to achieve different PTO power outputs. The whole machine is electrified, the carbon emissions of the tractor are reduced, the convenience of the whole machine is improved, and the flexible matching of different agricultural machinery and implements is met. The PTO power output adopts multiple independent PTO clutches to achieve independent control of the power output of the rear PTO, mid-PTO and front PTO, and can realize single PTO and multiple combined PTO operation modes.

[0006] Furthermore, a first gear is installed on the output shaft of the main drive motor, the first gear is meshed with a second gear, the second gear is meshed with a third gear, the third gear is connected to a fourth gear and a sixth gear through a transmission shaft, the fourth gear is meshed with a fifth gear, the sixth gear is meshed with a seventh gear, the fifth gear and the seventh gear are connected through a transmission shaft, an engagement sleeve is installed on the transmission shaft between the fifth gear and the seventh gear, the engagement sleeve is connected to a shift fork, and the transmission shaft between the fifth gear and the seventh gear is transmission-connected to the rear half shaft.

[0007] The beneficial effect of adopting the above further technical solution is that the high and low gears of the tractor are switched by the shift fork pushing the meshing sleeve. When the tractor is in low gear, the shift fork pushes the meshing sleeve to the fifth gear. When the tractor is in high gear, the shift fork pushes the meshing sleeve to the seventh gear.

[0008] Furthermore, a first driving bevel gear is connected to the transmission shaft between the fifth gear and the seventh gear, a first driven bevel gear is installed on the rear half shaft, and the first driving bevel gear is meshed with the first driven bevel gear.

[0009] The beneficial effect of adopting the above further technical solution is that the first active bevel gear and the first driven bevel gear are arranged to convert the axial rotation of the electric tractor into lateral rotation. The structure is simple and easy to install and maintain.

[0010] Furthermore, the transmission shaft between the fifth gear and the seventh gear is transmission-connected with a four-wheel drive transmission shaft, and the four-wheel drive transmission shaft is transmission-connected with a front half shaft.

[0011] The beneficial effect of adopting the above further technical solution is that the arrangement of the four-wheel drive transmission shaft facilitates the realization of the four-wheel drive function.

[0012] Furthermore, an eighth gear is connected to the transmission shaft between the fifth gear and the seventh gear, and the eighth gear is meshed with a ninth gear. The tenth gear and the second driving bevel gear are installed on the four-wheel drive transmission shaft, and the ninth gear is meshed with the tenth gear. A second driven bevel gear is installed on the front half shaft, and the second driving bevel gear is meshed with the second driven bevel gear.

[0013] The beneficial effect of adopting the above further technical solution is: the eighth gear transmits power to the ninth gear through meshing force, the ninth gear transmits power to the tenth gear through meshing force, the tenth gear rotates and drives the four-wheel drive transmission shaft to rotate, the four-wheel drive transmission shaft rotates and drives the second active bevel gear, the second active bevel gear transmits power to the second driven bevel gear through meshing force, the second driven bevel gear rotates and drives the front half shaft, and after the front half shaft rotates, the power is transmitted to the two front wheels to realize the rotation of the two front wheels.

[0014] Furthermore, an eleventh gear is installed on the output shaft of the PTO motor, the eleventh gear is meshed with a twelfth gear, the twelfth gear is connected to the first clutch through a transmission shaft, the first clutch is connected to a thirteenth gear through a transmission shaft, and a fourteenth gear is installed on the rear PTO output shaft, and the thirteenth gear is meshed with the fourteenth gear.

[0015] The beneficial effect of adopting the above further technical solution is: when the rear PTO works alone, the first clutch is engaged, the PTO motor transmits power through the eleventh gear, the eleventh gear transmits power to the twelfth gear by meshing force, the twelfth gear rotates to transmit power to the first clutch, the first clutch transmits power to the thirteenth gear, the thirteenth gear transmits power to the fourteenth gear by meshing force, the fourteenth gear rotates to drive the rear PTO output shaft to rotate, and the rear PTO shaft power output is realized. It is easy to realize the transmission connection between the PTO motor and the first clutch, realize the drive of the rear PTO output shaft, simplify the structure, and facilitate installation and maintenance.

[0016] Furthermore, a fifteenth gear is installed on the output shaft of the PTO motor, the fifteenth gear is meshed with a sixteenth gear, the sixteenth gear is meshed with a seventeenth gear, the seventeenth gear is connected to the second clutch through a transmission shaft, and the second clutch is connected to the mid-mounted PTO output shaft.

[0017] The beneficial effects of adopting the above further technical solution are: facilitating the transmission connection between the PTO motor and the second clutch, realizing the drive of the central PTO output shaft, simplifying the structure, and facilitating installation and maintenance.

[0018] Furthermore, the sixteenth gear is connected to the third clutch through a transmission shaft, the third clutch is connected to the eighteenth gear through a transmission shaft, a nineteenth gear is installed on the front PTO output shaft, and the eighteenth gear is meshed with the nineteenth gear.

[0019] The beneficial effects of adopting the above further technical solution are: facilitating the transmission connection between the PTO motor and the third clutch, realizing the drive of the front PTO output shaft, simplifying the structure, and facilitating installation and maintenance.

[0020] Furthermore, the PTO motor is connected to a PTO motor controller, and the PTO motor controller is connected to a vehicle controller.

[0021] The beneficial effect of adopting the above-mentioned further technical solution is: when PTO power output is required, the PTO control handle is switched to single PTO or combined PTO according to actual work requirements. At this time, the PTO control handle outputs a signal to the vehicle controller via CAN communication. After the vehicle controller receives the CAN signal, it sends a signal to the PTO motor controller via CAN communication. The PTO motor controller drives the PTO motor through electrical connection to start working.

[0022] Furthermore, the vehicle controller is respectively connected to a PTO control handle and an electronically controlled solenoid valve, the electronically controlled solenoid valve is connected to a servo cylinder, and the servo cylinder is respectively connected to the first clutch, the second clutch and the third clutch.

[0023] The beneficial effect of adopting the above further technical solution is: when PTO power output is required, the PTO control handle is switched to single PTO or combined PTO according to actual operation requirements. At this time, the PTO control handle outputs a signal to the vehicle controller through CAN communication. After the vehicle controller receives the CAN signal, on the one hand, it sends a signal to the PTO motor controller through CAN communication. The PTO motor controller drives the PTO motor to start working through electrical connection. On the other hand, the electronically controlled solenoid valve is opened through electrical connection. At this time, the electronically controlled solenoid valve supplies oil to the servo cylinder. After the servo cylinder is introduced with hydraulic oil, the first clutch, the second clutch and / or the third clutch are pushed to engage. At this time, the PTO motor transmits power to the PTO clutch through gear meshing. Since the PTO clutch is engaged, the power will be transmitted to the rear PTO output shaft, the middle PTO output shaft and / or the front PTO output shaft through the first clutch, the second clutch and / or the third clutch, thereby realizing PTO power output. By designing the PTO operation control strategy, with the help of CAN communication, electrical connection, hydraulic connection and mechanical connection, the PTO control handle can be manipulated to quickly realize the flexible output of PTO power and improve the working efficiency of the whole machine.

[0024] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a multifunctional electric tractor provided in an embodiment of the present invention.

[0026] Figure 2 A block diagram of the PTO power output control strategy provided by an embodiment of the present invention.

[0027] Description of the accompanying symbols: 1. Main drive motor; 2. First gear; 3. Second gear; 4. Third gear; 5. Fourth gear; 6. Fifth gear; 7. Shift fork; 8. Engagement sleeve; 9. Sixth gear; 10. Seventh gear; 11. Eighth gear; 12. First driving bevel gear; 13. First driven bevel gear; 14. Rear half shaft; 15. Ninth gear; 16. Tenth gear; 17. Four-wheel drive transmission shaft; 18. Second driving bevel gear; 19. Second driven bevel gear; 20. Front half shaft; 21. PTO motor; 22. 11th gear; 23. 12th gear; 24. First clutch; 25. 13th gear; 26. 14th gear; 27. Rear PTO output shaft; 28. 15th gear; 29. ​​16th gear; 30. 17th gear; 31. Second clutch; 32. Mid PTO output shaft; 33. Third clutch; 34. 18th gear; 35. 19th gear; 36. Front PTO output shaft. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention but not to limit the scope of the present invention.

[0029] like Figure 1 As shown, an embodiment of the present invention provides a multifunctional electric tractor, including: a main drive motor 1, a rear half shaft 14, a PTO motor 21, a first clutch 24, a rear PTO output shaft 27, a second clutch 31, a middle PTO output shaft 32, a third clutch 33, and a front PTO output shaft 36, wherein the main drive motor 1 is transmission-connected to the rear half shaft 14, the PTO motor 21 is transmission-connected to the first clutch 24, the second clutch 31 and the third clutch 33 respectively, the first clutch 24 is transmission-connected to the rear PTO output shaft 27, the second clutch 31 is transmission-connected to the middle PTO output shaft 32, and the third clutch 33 is transmission-connected to the front PTO output shaft 36.

[0030] The beneficial effects of the technical solution of the present invention are as follows: through the technical route of multiple motors with reducers, the coupling problem of walking and PTO power output is solved, and independent control of walking and PTO power output is achieved, achieving power decoupling. At the same time, the PTO motor is equipped with multiple clutches to achieve independent control of the power output of the rear PTO, mid-PTO and front PTO, so as to more flexibly match various agricultural machinery and implements, avoiding frequent manual switching of PTO meshing gears like traditional tractors to achieve different PTO power outputs. The whole machine is electrified, the carbon emissions of the tractor are reduced, the convenience of the whole machine is improved, and the flexible matching of different agricultural machinery and implements is met. The PTO power output adopts multiple independent PTO clutches to achieve independent control of the power output of the rear PTO, mid-PTO and front PTO, and can realize single PTO and multiple combined PTO operation modes.

[0031] Electric tractors are becoming more and more popular in the agricultural field due to their low carbon emissions, low noise, and fuel saving. Compared with traditional fuel tractors, electric tractors have a simpler structure and can solve the coupling problem of walking and PTO power output through a multi-motor + reducer route, realizing independent control of walking and PTO power output, and achieving power decoupling. At the same time, the PTO motor is equipped with multiple clutches to achieve independent control of the power output of the rear PTO, mid-PTO, and front PTO, so as to more flexibly match various agricultural machinery and implements, avoiding frequent manual switching of PTO meshing gears like traditional tractors to achieve different PTO power outputs. Therefore, designing a multifunctional electric tractor is of great significance to the electrification of the entire machine, ease of use, economy, and carbon emissions.

[0032] like Figure 1 As shown, further, a first gear 2 is installed on the output shaft of the main drive motor 1, the first gear 2 is meshed with a second gear 3, the second gear 3 is meshed with a third gear 4, the third gear 4 is connected to a fourth gear 5 and a sixth gear 9 through a transmission shaft, the fourth gear 5 is meshed with a fifth gear 6, the sixth gear 9 is meshed with a seventh gear 10, the fifth gear 6 and the seventh gear 10 are connected through a transmission shaft, a meshing sleeve 8 is installed on the transmission shaft between the fifth gear 6 and the seventh gear 10, the meshing sleeve 8 is connected with a shift fork 7, and the transmission shaft between the fifth gear 6 and the seventh gear 10 is transmission-connected to the rear half shaft 14.

[0033] The beneficial effect of adopting the above further technical solution is that the high and low gears of the tractor are switched by the shift fork pushing the meshing sleeve. When the tractor is in low gear, the shift fork pushes the meshing sleeve to the fifth gear. When the tractor is in high gear, the shift fork pushes the meshing sleeve to the seventh gear.

[0034] like Figure 1As shown, further, a first driving bevel gear 12 is connected to the transmission shaft between the fifth gear 6 and the seventh gear 10 , a first driven bevel gear 13 is installed on the rear half shaft 14 , and the first driving bevel gear 12 is meshed with the first driven bevel gear 13 .

[0035] The beneficial effect of adopting the above further technical solution is that the first active bevel gear and the first driven bevel gear are arranged to convert the axial rotation of the electric tractor into lateral rotation. The structure is simple and easy to install and maintain.

[0036] like Figure 1 As shown, further, the transmission shaft between the fifth gear 6 and the seventh gear 10 is transmission-connected with a four-wheel drive transmission shaft 17 , and the four-wheel drive transmission shaft 17 is transmission-connected with a front half shaft 20 .

[0037] The beneficial effect of adopting the above further technical solution is that the arrangement of the four-wheel drive transmission shaft facilitates the realization of the four-wheel drive function.

[0038] like Figure 1 As shown, further, an eighth gear 11 is connected to the transmission shaft between the fifth gear 6 and the seventh gear 10, and the eighth gear 11 is meshed with a ninth gear 15. A tenth gear 16 and a second driving bevel gear 18 are installed on the four-wheel drive transmission shaft 17, and the ninth gear 15 is meshed with the tenth gear 16. A second driven bevel gear 19 is installed on the front half shaft 20, and the second driving bevel gear 18 is meshed with the second driven bevel gear 19.

[0039] The beneficial effect of adopting the above further technical solution is: the eighth gear transmits power to the ninth gear through meshing force, the ninth gear transmits power to the tenth gear through meshing force, the tenth gear rotates and drives the four-wheel drive transmission shaft to rotate, the four-wheel drive transmission shaft rotates and drives the second active bevel gear, the second active bevel gear transmits power to the second driven bevel gear through meshing force, the second driven bevel gear rotates and drives the front half shaft, and after the front half shaft rotates, the power is transmitted to the two front wheels to realize the rotation of the two front wheels.

[0040] like Figure 1 As shown, further, an eleventh gear 22 is installed on the output shaft of the PTO motor 21, and the eleventh gear 22 is meshed with a twelfth gear 23. The twelfth gear 23 is connected to the first clutch 24 through a transmission shaft, and the first clutch 24 is connected to a thirteenth gear 25 through a transmission shaft. A fourteenth gear 26 is installed on the rear PTO output shaft 27, and the thirteenth gear 25 is meshed with the fourteenth gear 26.

[0041] The beneficial effect of adopting the above further technical solution is: when the rear PTO works alone, the first clutch is engaged, the PTO motor transmits power through the eleventh gear, the eleventh gear transmits power to the twelfth gear by meshing force, the twelfth gear rotates to transmit power to the first clutch, the first clutch transmits power to the thirteenth gear, the thirteenth gear transmits power to the fourteenth gear by meshing force, the fourteenth gear rotates to drive the rear PTO output shaft to rotate, and the rear PTO shaft power output is realized. It is easy to realize the transmission connection between the PTO motor and the first clutch, realize the drive of the rear PTO output shaft, simplify the structure, and facilitate installation and maintenance.

[0042] like Figure 1 As shown, further, a fifteenth gear 28 is installed on the output shaft of the PTO motor 21, the fifteenth gear 28 is meshed with a sixteenth gear 29, the sixteenth gear 29 is meshed with a seventeenth gear 30, the seventeenth gear 30 is connected to the second clutch 31 through a transmission shaft, and the second clutch 31 is connected to the mid-mounted PTO output shaft 32.

[0043] The beneficial effects of adopting the above further technical solution are: facilitating the transmission connection between the PTO motor and the second clutch, realizing the drive of the central PTO output shaft, simplifying the structure, and facilitating installation and maintenance.

[0044] like Figure 1 As shown, further, the sixteenth gear 29 is connected to the third clutch 33 through a transmission shaft, the third clutch 33 is connected to the eighteenth gear 34 through a transmission shaft, the nineteenth gear 35 is installed on the front PTO output shaft 36, and the eighteenth gear 34 is meshed with the nineteenth gear 35.

[0045] The beneficial effects of adopting the above further technical solution are: facilitating the transmission connection between the PTO motor and the third clutch, realizing the drive of the front PTO output shaft, simplifying the structure, and facilitating installation and maintenance.

[0046] like Figure 2 As shown, further, the PTO motor 21 is connected to a PTO motor controller, and the PTO motor controller is connected to a vehicle controller.

[0047] The beneficial effect of adopting the above-mentioned further technical solution is: when PTO power output is required, the PTO control handle is switched to single PTO or combined PTO according to actual work requirements. At this time, the PTO control handle outputs a signal to the vehicle controller via CAN communication. After the vehicle controller receives the CAN signal, it sends a signal to the PTO motor controller via CAN communication. The PTO motor controller drives the PTO motor through electrical connection to start working.

[0048] like Figure 2 As shown, further, the vehicle controller is respectively connected to a PTO control handle and an electronically controlled solenoid valve, the electronically controlled solenoid valve is connected to a servo cylinder, and the servo cylinder is respectively connected to the first clutch 24, the second clutch 31 and the third clutch 33.

[0049] The beneficial effect of adopting the above further technical solution is: when PTO power output is required, the PTO control handle is switched to single PTO or combined PTO according to actual operation requirements. At this time, the PTO control handle outputs a signal to the vehicle controller through CAN communication. After the vehicle controller receives the CAN signal, on the one hand, it sends a signal to the PTO motor controller through CAN communication. The PTO motor controller drives the PTO motor to start working through electrical connection. On the other hand, the electronically controlled solenoid valve is opened through electrical connection. At this time, the electronically controlled solenoid valve supplies oil to the servo cylinder. After the servo cylinder is introduced with hydraulic oil, the first clutch, the second clutch and / or the third clutch are pushed to engage. At this time, the PTO motor transmits power to the PTO clutch through gear meshing. Since the PTO clutch is engaged, the power will be transmitted to the rear PTO output shaft, the middle PTO output shaft and / or the front PTO output shaft through the first clutch, the second clutch and / or the third clutch, thereby realizing PTO power output. By designing the PTO operation control strategy, with the help of CAN communication, electrical connection, hydraulic connection and mechanical connection, the PTO control handle can be manipulated to quickly realize the flexible output of PTO power and improve the working efficiency of the whole machine.

[0050] At present, traditional tractors all use the diesel engine matched with a multi-speed gearbox technology route. Travel and PTO cannot be decoupled, and frequent gear shifting is required to achieve different operating speed conditions. At the same time, the rear, middle and front PTO power output switching requires manual switching of the PTO meshing gear to achieve, which is complex in structure, cumbersome to operate, and low in work efficiency. A multifunctional electric tractor provided by an embodiment of the present invention realizes power decoupling of travel and PTO power output through a multi-motor with a reducer technology route. At the same time, the PTO motor is equipped with multiple clutches to realize automatic switching and independent control of the rear, middle and front PTO outputs, realizes the electrification of the whole machine, reduces the carbon emissions of the tractor, improves the convenience of the whole machine, and meets the flexible matching of different agricultural machinery.

[0051] When the electric tractor is in walking mode, the main drive motor 1 transmits power through the first gear 2, and the first gear 2 transmits power to the third gear 4 by means of the meshing force between the first gear 2 and the second gear 3. The third gear 4 rotates and drives the fourth gear 5 to rotate. The high and low gears of the tractor are switched by the shift fork 7 pushing the meshing sleeve 8. When the tractor is in low gear, the shift fork 7 pushes the meshing sleeve 8 to the fifth gear 6. At this time, the fourth gear 5 transmits power to the fifth gear 6 by means of the meshing force between the fifth gear 6 and the fifth gear 6. The fifth gear 6 rotates and drives the first active bevel gear 12 and the eighth gear 11 through the meshing sleeve 8. At this time, the first active bevel gear 12 transmits power to the first driven bevel gear 13 by means of the meshing force. The first driven bevel gear 13 rotates and drives the rear half shaft 14. After the rear half shaft 14 rotates, the power is transmitted to the two rear wheels to realize the rotation of the two rear wheels. At the same time, the eighth gear 11 transmits power to the ninth gear 15 through meshing force, the ninth gear 15 transmits power to the tenth gear 16 through meshing force, the tenth gear 16 rotates and drives the four-wheel drive transmission shaft 17 to rotate, the four-wheel drive transmission shaft 17 rotates and drives the second active bevel gear 18, the second active bevel gear 18 transmits power to the second driven bevel gear 19 through meshing force, the second driven bevel gear 19 rotates and drives the front half shaft 20, after the front half shaft 20 rotates, the power is transmitted to the two front wheels, so that the two front wheels rotate.

[0052] When the tractor is in high gear, the power transmission principle is the same as the low gear mentioned above.

[0053] When the electric tractor is in PTO operation mode, the operation mode is divided into single PTO operation and combined PTO operation. When the rear PTO operates alone, the first clutch 24 is engaged, and the PTO motor 21 transmits power through the eleventh gear 22. The eleventh gear 22 transmits power to the twelfth gear 23 using meshing force. The twelfth gear 23 rotates to transmit power to the first clutch 24. The first clutch 24 transmits power to the thirteenth gear 25. The thirteenth gear 25 transmits power to the fourteenth gear 26 using meshing force. The fourteenth gear 26 rotates to drive the rear PTO output shaft 27 to rotate, thereby realizing the rear PTO shaft power output.

[0054] When the middle PTO works alone and the front PTO works alone, the power transmission principle is the same as that of the rear PTO works alone.

[0055] When the combined PTO is operating at the same time, taking the simultaneous power output of the middle PTO and the rear PTO as an example, at this time, the first clutch 24 is engaged and the second clutch 31 is engaged, the PTO motor 21 transmits power through the fifteenth gear 28, the fifteenth gear 28 transmits power to the sixteenth gear 29 by meshing force, the sixteenth gear 29 transmits power to the seventeenth gear 30 by meshing force, the seventeenth gear 30 rotates to transmit power to the second clutch 31, the second clutch 31 transmits power to the middle PTO power output shaft (middle PTO output shaft 32), and the middle PTO shaft power output is realized; the PTO motor 21 transmits power through the eleventh gear 22, the eleventh gear 22 transmits power to the twelfth gear 23 by meshing force, the twelfth gear 23 rotates to transmit power to the first clutch 24, the first clutch 24 transmits power to the thirteenth gear 25, the thirteenth gear 25 transmits power to the fourteenth gear 26 by meshing force, the fourteenth gear 26 rotates to drive the rear PTO output shaft 27 to rotate, and the rear PTO shaft power output is realized, thereby realizing the simultaneous power output of the middle PTO and the rear PTO.

[0056] When the front PTO, middle PTO and rear PTO output power at the same time, the first clutch 24, the second clutch 31 and the third clutch 33 need to be combined, and the PTO motor 21 provides power output for the front PTO, middle PTO and rear PTO at the same time through the above-mentioned power transmission principle.

[0057] Figure 2 This is the PTO power output control strategy block diagram. Figure 2 In the embodiment, the PTO control handle is connected to the vehicle controller through CAN communication, the electronically controlled solenoid valve is electrically connected to the vehicle controller, the PTO motor controller is connected to the vehicle controller through CAN communication, the PTO motor is electrically connected to the PTO motor controller, the servo cylinder is hydraulically connected to the electronically controlled solenoid valve, the PTO clutch is hydraulically connected to the servo cylinder, the PTO motor is mechanically connected to the gear, the gear is mechanically connected to the PTO clutch, and the PTO clutch is mechanically connected to the PTO output shaft. Figure 2 The dashed lines in the figure are CAN communication, which is implemented as an electrical connection, the arrows are hydraulic connections, and the straight lines with endpoints are mechanical connections.

[0058] When PTO power output is required, the PTO control handle is switched to single PTO or combined PTO according to actual operation requirements. At this time, the PTO control handle outputs a signal to the vehicle controller through CAN communication. After the vehicle controller receives the CAN signal, it sends a signal to the PTO motor controller through CAN communication. The PTO motor controller drives the PTO motor 21 to start working through electrical connection, and at the same time, opens the electronically controlled solenoid valve through electrical connection. At this time, the electronically controlled solenoid valve supplies oil to the servo cylinder. After the servo cylinder is filled with hydraulic oil, it pushes the PTO clutch (the first clutch 24, the second clutch 31 and the third clutch 33) to engage. At this time, the PTO motor 21 transmits power to the PTO clutch through gear meshing. Since the PTO clutch is engaged, the power will be transmitted to the PTO power output shaft (the rear PTO output shaft 27, the middle PTO output shaft 32 and the front PTO output shaft 36) through the PTO clutch (the first clutch 24, the second clutch 31 and the third clutch 33), thereby realizing PTO power output.

[0059] 1. Through the multi-motor with reducer technology route, the power decoupling of walking and PTO power output is realized, and the walking (realized by the main drive motor) and PTO motor are independently controlled.

[0060] 2. The PTO power output adopts multiple independent PTO clutches (the first clutch 24, the second clutch 31 and the third clutch 33), which realizes independent control of the rear PTO, mid-PTO and front PTO power output, and can realize single PTO and multiple combined PTO operation modes.

[0061] 3. The newly designed PTO operation control strategy uses CAN communication, electrical connection, hydraulic connection and mechanical connection to quickly realize the flexible output of PTO power by operating the PTO control handle, thereby improving the working efficiency of the whole machine.

[0062] The active motor (main drive motor 1) and PTO motor + reducer technology route solves the problem of power coupling between walking and PTO of traditional fuel tractors, realizes independent control of walking and PTO power output, and achieves power decoupling.

[0063] The PTO power output uses multiple independent PTO clutches to engage and cut off power, avoiding the traditional PTO manual switching of meshing gears. The operation is simpler and can achieve flexible power output of single PTO and multiple combined PTOs.

[0064] The PTO mode is switched through the PTO control handle. Through electronic control, the PTO clutch can be quickly and conveniently disconnected and engaged to achieve PTO power output, making operation more convenient and working efficiency higher.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional electric tractor, characterized in that: include: A main drive motor (1), a rear half shaft (14), a PTO motor (21), a first clutch (24), a rear PTO output shaft (27), a second clutch (31), a middle PTO output shaft (32), a third clutch (33), and a front PTO output shaft (36); the main drive motor (1) is transmission-connected to the rear half shaft (14); the PTO motor (21) is transmission-connected to the first clutch (24), the second clutch (31), and the third clutch (33); the first clutch (24) is transmission-connected to the rear PTO output shaft (27); the second clutch (31) is transmission-connected to the middle PTO output shaft (32); and the third clutch (33) is transmission-connected to the front PTO output shaft (36); an eleventh gear (22) is mounted on the output shaft of the PTO motor (21); the eleventh gear (22) is meshed with a twelfth gear (23); the twelfth gear (23) is connected to the first clutch via a transmission shaft. The first clutch (24) is connected to a thirteenth gear (25) through a transmission shaft, a fourteenth gear (26) is mounted on the rear PTO output shaft (27), and the thirteenth gear (25) meshes with the fourteenth gear (26); a fifteenth gear (28) is mounted on the output shaft of the PTO motor (21), the fifteenth gear (28) meshes with a sixteenth gear (29), the sixteenth gear (29) meshes with a seventeenth gear (30), the seventeenth gear (30) is connected to the second clutch (31) through a transmission shaft, and the second clutch (31) is connected to the mid-mounted PTO output shaft (32); the sixteenth gear (29) is connected to the third clutch (33) through a transmission shaft, the third clutch (33) is connected to an eighteenth gear (34) through a transmission shaft, a nineteenth gear (35) is mounted on the front PTO output shaft (36), and the eighteenth gear (34) meshes with the nineteenth gear (35).

2. A multifunctional electric tractor according to claim 1, characterized in that: A first gear (2) is mounted on the output shaft of the main drive motor (1); the first gear (2) is meshed with a second gear (3); the second gear (3) is meshed with a third gear (4); the third gear (4) is connected to a fourth gear (5) and a sixth gear (9) via a transmission shaft; the fourth gear (5) is meshed with a fifth gear (6); the sixth gear (9) is meshed with a seventh gear (10); the fifth gear (6) and the seventh gear (10) are connected via a transmission shaft; a meshing sleeve (8) is mounted on the transmission shaft between the fifth gear (6) and the seventh gear (10); the meshing sleeve (8) is connected to a shift fork (7); and the transmission shaft between the fifth gear (6) and the seventh gear (10) is transmission-connected to the rear half shaft (14).

3. A multifunctional electric tractor according to claim 2, characterized in that: A first driving bevel gear (12) is connected to the transmission shaft between the fifth gear (6) and the seventh gear (10), a first driven bevel gear (13) is mounted on the rear half shaft (14), and the first driving bevel gear (12) is meshed with the first driven bevel gear (13).

4. The multifunctional electric tractor according to claim 2, characterized in that: The transmission shaft between the fifth gear (6) and the seventh gear (10) is transmission-connected to a four-wheel drive transmission shaft (17), and the four-wheel drive transmission shaft (17) is transmission-connected to a front half shaft (20).

5. The multifunctional electric tractor according to claim 4, characterized in that: An eighth gear (11) is connected to the transmission shaft between the fifth gear (6) and the seventh gear (10), and the eighth gear (11) is meshed with a ninth gear (15). A tenth gear (16) and a second active bevel gear (18) are mounted on the four-wheel drive transmission shaft (17), and the ninth gear (15) is meshed with the tenth gear (16). A second driven bevel gear (19) is mounted on the front half shaft (20), and the second active bevel gear (18) is meshed with the second driven bevel gear (19).

6. The multifunctional electric tractor according to claim 1, characterized in that: The PTO motor (21) is connected to a PTO motor controller, and the PTO motor controller is connected to a vehicle controller.

7. The multifunctional electric tractor according to claim 6, characterized in that: The vehicle controller is respectively connected to a PTO control handle and an electrically controlled solenoid valve, the electrically controlled solenoid valve is connected to a servo cylinder, and the servo cylinder is respectively connected to the first clutch (24), the second clutch (31) and the third clutch (33).

Images