Dual-motor driving device of hilly and mountainous region tractor

Abstract

The invention discloses a dual-motor driving device of a hilly and mountainous region tractor. The hilly and mountainous region tractor comprises a front driving wheel with a first differential mechanism (12), a rear driving wheel with a second differential mechanism (23), a first rotary agricultural implement (13) and a second rotary agricultural implement (24), the double-motor driving device comprises a main motor (1), an auxiliary motor (14) and a power coupling box (3). A synchronizer and double-clutch structure is adopted, switching of multiple working modes is achieved, the device is suitable for cultivation of multiple different terrains, the adaptability of agricultural machinery to the environment is greatly improved, and the utilization rate of the motor is increased.

Description

Technical Field

[0001] The invention relates to the field of agricultural machinery and equipment, in particular to a dual-motor driving device for a hilly mountain tractor. Background Art

[0002] With the development of new energy, electric tractors have emerged, which have the advantages of low noise, no pollution, no emission, simple and reliable, low cost of use, etc. In order to solve the problem that the mechanical power of the dual motors cannot be output to the drive wheel or the power output device (PTO) at the same time, resulting in insufficient power of the whole machine under the condition of full load output of traction power and rotation power, there is now a dual-motor driven electric tractor power coupling device, such as the Chinese invention patent with publication number CN111775723A, which discloses a power battery, a whole machine controller connected to the power battery, a first inverter and a second inverter connected to the whole machine controller, a drive motor and a PTO motor respectively connected to the first inverter and the second inverter, a power coupling mechanism connected to the drive motor and the PTO motor, a transmission mechanism and a rotary tillage mechanism connected to the power coupling mechanism, and a drive wheel connected to the transmission mechanism. The power coupling device in the device mainly realizes power coupling through the combination of two planetary gear mechanisms and two synchronizer shift mechanisms working together. However, the device still has the following problems: 1. Structurally, the power output by the power output shaft can only control the dual drive wheel drive, and the driving flexibility is insufficient when facing different terrains. Secondly, there is only one-side agricultural machinery, the position cannot be adjusted, and the use is limited; 2. In terms of function, the device uses speed coupling, and its adaptability to hilly terrain is insufficient; 3. In terms of mode, the device has fewer modes that can be switched and a small scope of application. Summary of the invention

[0003] The purpose of the present invention is to provide a dual-motor drive device for a hilly mountain tractor. The present invention adopts a synchronizer and a dual-clutch structure to achieve multiple working mode switching, adapt to farming in various different terrains, greatly enhance the adaptability of agricultural machinery to the environment, and improve the utilization rate of the motor.

[0004] The technical solution of the present invention is as follows: a dual-motor drive device for a hilly mountain tractor, the hilly mountain tractor comprising a front drive wheel with a first differential, a rear drive wheel with a second differential, a first rotary agricultural implement and a second rotary agricultural implement; the dual-motor drive device comprises a main motor, an auxiliary motor and a power coupling box; the power coupling box is provided with a first input shaft and a first output shaft arranged coaxially, the first output shaft is connected to the first differential and the first rotary agricultural implement respectively through a gear set, and the first input shaft is connected to the output end of the main motor; the power coupling box is provided with a second input shaft and a second output shaft arranged coaxially, the second output shaft is connected to the second differential and the second rotary agricultural implement respectively through a gear set, and the second input shaft is connected to the output end of the auxiliary motor; a first constant meshing gear set is provided between the first input shaft and the second output shaft, and a second constant meshing gear set is provided between the second input shaft and the first output shaft; a synchronizer matched with the first constant meshing gear set and the second constant meshing gear set is provided on the first input shaft; the second input shaft is provided with a first clutch matched with the first constant meshing gear set and a second clutch matched with the second constant meshing gear set.

[0005] In the above-mentioned dual-motor drive device for the hilly mountain tractor, the first constantly meshed gear set includes a first transmission gear arranged on the first input shaft and a fourth transmission gear arranged on the second output shaft, and the first transmission gear and the fourth transmission gear are meshed with each other.

[0006] In the aforementioned dual-motor drive device of the hilly mountain tractor, the second constantly meshing gear set includes a third transmission gear arranged on the second input shaft and a second transmission gear arranged on the first output shaft, and the third transmission gear and the second transmission gear are meshed.

[0007] In the aforementioned dual-motor drive device of the hilly mountain tractor, a third constant mesh gear set and a fourth constant mesh gear set are provided on the first output shaft, the output end of the third constant mesh gear set is provided with a first PTO output shaft connected to the first rotary agricultural machinery, and the output end of the fourth constant mesh gear set is provided with a first differential input shaft connected to the first differential.

[0008] In the aforementioned dual-motor drive device of the hilly mountain tractor, a fifth constant mesh gear set and a sixth constant mesh gear set are provided on the second output shaft, the output end of the fifth constant mesh gear set is provided with a second PTO output shaft connected to the second rotary agricultural machinery, and the output end of the sixth constant mesh gear set is provided with a second differential input shaft connected to the second differential.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] 1. In the present invention, there are mainly two power sources, including a main motor and an auxiliary motor. The main motor transmits power to the synchronizer through the first input shaft. The synchronizer can engage with the first constant mesh gear set to the left, and the power is transmitted to the second differential and the second rotary agricultural machinery through the second output shaft. The synchronizer can also engage with the second constant mesh gear set to the right, and the power is transmitted to the first differential and the first rotary agricultural machinery through the first output shaft; the auxiliary motor transmits power through the second input shaft, the first clutch engages with the second constant mesh gear set, and the power is output to the first differential and the first rotary agricultural machinery by the first output shaft; if the first clutch engages with the first constant mesh gear set, the power is transmitted to the second differential and the second rotary agricultural machinery by the second output shaft; the present invention mainly realizes different power flows through two clutches and one synchronizer, thereby obtaining different working modes, meeting a variety of working conditions, using a variety of different terrains for farming, greatly enhancing the adaptability of agricultural machinery to the environment, and improving the utilization rate of the motor.

[0011] 2. The present invention mainly realizes the switching of multiple modes through torque coupling to adapt to the complex terrain of hills.

[0012] 3. Rotate the agricultural machinery to the corresponding position according to the actual terrain conditions to improve the flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 A schematic diagram of the main motor driving the front drive wheel alone;

[0015] Figure 3 A schematic diagram of the first working condition in which the main motor drives the front and rear drive wheels simultaneously;

[0016] Figure 4 A schematic diagram of the second working condition in which the main motor drives the front and rear drive wheels simultaneously;

[0017] Figure 5 A schematic diagram of the first working condition in which the main motor and the auxiliary motor drive the front and rear drive wheels simultaneously;

[0018] Figure 6 A schematic diagram of a second working condition in which the main motor and the auxiliary motor drive the front and rear drive wheels simultaneously;

[0019] Figure 7 Schematic diagram of controlling the rear drive wheels independently for the auxiliary motor;

[0020] Figure 8 Schematic diagram of controlling the front drive wheels individually for the auxiliary motor;

[0021] Fig. 9A schematic diagram of the auxiliary motor driving the front and rear drive wheels simultaneously;

[0022] Fig.10 A schematic diagram of the main motor and the auxiliary motor driving the rear drive wheel simultaneously;

[0023] Fig.11 Schematic diagram of the main motor and auxiliary motor driving the front drive wheels simultaneously.

[0024] Explanation of the marks in the accompanying drawings: 1. main motor, 2. first input shaft, 3. power coupling box, 4. first constant mesh gear set, 4-1, first transmission gear, 5. synchronizer, 6. second constant mesh gear set, 6-1, second transmission gear, 7. first output shaft, 8. third constant mesh gear set, 9. fourth constant mesh gear set, 10. first PTO output shaft, 11. first differential input shaft, 12. first differential, 13. first rotary agricultural machinery, 14. auxiliary motor, 15. second input shaft, 16. second clutch, 6-2, third transmission gear, 17. first clutch, 4-2, fourth transmission gear, 18. second output shaft, 19. fifth constant mesh gear set, 20. sixth constant mesh gear set, 21. second PTO output shaft, 22. second differential input shaft, 23. second differential, 24. second rotary agricultural machinery. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0026] Embodiment: A dual-motor drive device for a hilly mountain tractor, the hilly mountain tractor comprising a front drive wheel with a first differential 12, a rear drive wheel with a second differential 23, a first rotary agricultural implement 13 and a second rotary agricultural implement 24; the dual-motor drive device comprises a main motor 1, an auxiliary motor 14 and a power coupling box 3; the power coupling box 3 is provided with a coaxially arranged first input shaft 2 and a first output shaft 7, the first input shaft and the first output shaft are not connected, the first output shaft 7 is connected to the first differential 12 and the first rotary agricultural implement 13 respectively through a gear set, the first input shaft 2 is connected to the output end of the main motor 1, the power coupling box 3 is provided with a coaxially arranged second input shaft 15 and a second output shaft 18, the second output shaft 18 is connected to the second rotary agricultural implement 13 respectively through a gear set The differential 23 is connected to the second rotary agricultural implement 24, and the second input shaft 15 is connected to the output end of the auxiliary motor 14; the first input shaft 2 and the second output shaft 18 are equipped with a first constant mesh gear set 4, and the second input shaft 15 and the first output shaft 7 are equipped with a second constant mesh gear set 6; the first input shaft 2 is equipped with a synchronizer 5 that cooperates with the first constant mesh gear set 4 and the second constant mesh gear set 6 respectively, and the power transmission between the first input shaft and the first output shaft is mainly achieved by the synchronizer cooperating with the first constant mesh gear set and the second constant mesh gear set respectively; the second input shaft 15 is respectively transmitted by cooperating with the first constant mesh gear set 4 and the second constant mesh gear set 6 through a clutch structure, and the two clutches are a first clutch 17 and a second clutch 16. The main motor 1 and the auxiliary motor 14 are distributed on both sides of the power coupling box, and the first clutch 17 and the second clutch 16 are coaxially connected. Such a structure effectively saves space for the entire transmission system.

[0027] The first constantly meshed gear set 4 includes a first transmission gear 4-1 arranged on the first input shaft 2 and a fourth transmission gear 4-2 arranged on the second output shaft 18, and the first transmission gear 4-1 and the fourth transmission gear 4-2 are meshed with each other; the second constantly meshed gear set 6 includes a third transmission gear 6-2 arranged on the second input shaft 15 and a second transmission gear 6-1 arranged on the first output shaft 7, and the third transmission gear 6-2 and the second transmission gear 6-1 are meshed with each other.

[0028] The first output shaft 7 is provided with a third constant mesh gear set 8 and a fourth constant mesh gear set 9, the output end of the third constant mesh gear set 8 is provided with a first PTO output shaft 10 connected to the first rotary agricultural machinery 13, and the output end of the fourth constant mesh gear set 9 is provided with a first differential input shaft 11 connected to the first differential 12; the second output shaft 18 is provided with a fifth constant mesh gear set 19 and a sixth constant mesh gear set 20, the output end of the fifth constant mesh gear set 19 is provided with a second PTO output shaft 21 connected to the second rotary agricultural machinery 24, and the output end of the sixth constant mesh gear set 20 is provided with a second differential input shaft 22 connected to the second differential 23.

[0029] The present invention combines two clutches and a synchronizer to form different working modes, mainly including the following:

[0030] 1. The main motor 1 drives the front drive wheel alone: ​​A. The main motor 1 outputs power, the auxiliary motor 14 does not work, the synchronizer 5 is engaged to the right, the first clutch 17 and the second clutch 16 are not engaged, and the power output by the main motor 1 is transmitted to the first PTO output shaft 10 and the first differential input shaft 11 through the first input shaft 2, the synchronizer 5 and the second constant meshing gear set 6 to drive the first rotary agricultural implement 13 and the front drive wheel. The power transmission flow is as shown in the attached figure. Figure 1 B. The power is output by the main motor 1, the auxiliary motor 14 does not work, the synchronizer 5 is engaged to the left, the first clutch 17 and the second clutch 16 are engaged, the power output by the main motor 1 passes through the first input shaft 2, the first constant meshing gear set 4 and the second constant meshing gear set 6, and the power is output by the first output shaft 7, the third constant meshing gear set 8 and the fourth constant meshing gear set 9 are transmitted to the first PTO output shaft 10 and the first differential input shaft 11, thereby driving the first rotary agricultural implement 13 and the front drive wheel. The power transmission flow is as shown in the attached figure. Figure 2 shown.

[0031] 2. The main motor 1 drives the front and rear drive wheels at the same time. This structure is suitable for light-load rotary tillage on sloped land: A. The main motor 1 outputs power, the auxiliary motor 14 does not work, the synchronizer 5 is engaged to the left, the first clutch 17 and the second clutch 16 are engaged, and the power is transmitted to the second output shaft 18 through the first constant mesh gear set 4. The power is split here, and a part of the power is transmitted to the second PTO output shaft 21 and the second differential input shaft 22 through the fifth constant mesh gear set 19 and the sixth constant mesh gear set 20, thereby driving the second rotary agricultural machinery 24 and the rear drive wheel; the other part of the power is transmitted to the first output shaft 7 through the second constant mesh gear set 6, and the third constant mesh gear set 8 and the fourth constant mesh gear set 9 are transmitted to the first PTO output shaft 10 and the first differential input shaft 11, thereby driving the front drive wheel. This power combination meets the needs of slopes with gentle terrain. The power transmission flow is as shown in the attached figure. Figure 3As shown; B. The main motor 1 outputs power, the auxiliary motor 14 does not work, the synchronizer 5 is engaged to the right, the first clutch 17 and the second clutch 16 are engaged, and the power is transmitted to the second constant mesh gear set 6 through the first input shaft 2, where the power is split, a part of the power is transmitted to the third constant mesh gear set 8 and the fourth constant mesh gear set 9 through the first output shaft 7, and then transmitted to the first PTO output shaft 10 and the first differential input shaft 11, thereby driving the front drive wheel; the other part of the power is transmitted to the fifth constant mesh gear set 19 and the sixth constant mesh gear set 20 through the second input shaft 15 and the second output shaft 18, and then transmitted to the second PTO output shaft 21 and the second differential input shaft 22, thereby driving the second rotary agricultural machinery 24 and the rear drive wheel, and the power transmission flow is as shown in the attached figure Figure 4 shown.

[0032] 3. The main motor 1 and the auxiliary motor 14 drive the front and rear drive wheels at the same time. This structure is suitable for light-load rotary tillage in the mountains, heavy-load plowing in the mountains, medium-load plowing in the mountains and other working conditions that require high power: A. The main motor 1 and the auxiliary motor 14 output power at the same time, the synchronizer 5 is engaged to the left, the first clutch 17 and the second clutch 16 are engaged, and the power output by the main motor 1 is transmitted to the first constant mesh gear set 4 through the first input shaft 2. Here, the power is split, and part of the power is transmitted to the fifth constant mesh gear set 19 and the sixth constant mesh gear set 20. At the same time, the power output by the auxiliary motor 14 is coupled through the first clutch 17 and the second clutch 16 to transmit The second differential input shaft 22 and the second PTO output shaft 21 drive the rear drive wheel and the second rotary agricultural implement 24. The main motor and the auxiliary motor output part of the power to jointly drive the rear drive wheel and the second rotary agricultural implement; another part of the power output by the main motor is transmitted to the second constant mesh gear set 6 through the second input shaft 15, and at the same time, another part of the power output by the auxiliary motor 14 is transmitted to the second constant mesh gear set 6, the third constant mesh gear set 8 and the fourth constant mesh gear set 9 through the second input shaft 15, and then transmitted to the first differential input shaft 11, thereby driving the front drive wheel. The front and rear drive wheels work at the same time to meet the climbing power. The power flow is as shown in the attached figure. Figure 5As shown; B. The main motor 1 outputs power, the auxiliary motor 14 outputs power, the synchronizer 5 is engaged to the right, the first clutch 17 and the second clutch 16 are engaged, the power output of the main motor 1 is transmitted to the second constant mesh gear set 6 through the first input shaft 2, and is coupled with the power output of the auxiliary motor 14 through the third constant mesh gear set 8 and the fourth constant mesh gear set 9 to the first differential input shaft 11 and the first PTO output shaft 10. The main motor and the auxiliary motor both output part of the power on the first differential input shaft 11 and the first PTO output shaft 10, thereby jointly driving the front drive wheel; the other part of the power output of the main motor is transmitted to the second input shaft 15 through the second constant mesh gear set, and is coupled with the power output of the auxiliary motor 14 through the second input shaft 15 and the second output shaft 18 to the fifth constant mesh gear set 19 and the sixth constant mesh gear set 20, and then transmitted to the second differential input shaft 22 and the second PTO output shaft 21, thereby jointly driving the rear drive wheel and the second rotary agricultural implement 24, meeting the climbing power, and the power flow is as shown in the attached figure Figure 6 shown.

[0033] 4. The auxiliary motor 14 controls the rear drive wheels alone: ​​the auxiliary motor 14 outputs power, the main motor 1 does not work, the synchronizer 5 is suspended and not engaged with the gear sets on both sides, the first clutch 17 is suspended or engaged and the second clutch 16 is engaged, the power output by the auxiliary motor 14 passes through the second input shaft 15 and the second output shaft 18 to the fifth constant meshing gear set and the sixth constant meshing gear set, driving the second PTO output shaft 21 and the second differential input shaft 22 to rotate and drive the rear drive wheels to move. The power flow is as shown in the attached figure. Figure 7 As shown;

[0034] The auxiliary motor 14 controls the front drive wheel alone, and the power is output by the auxiliary motor 14. The main motor 1 does not work, the synchronizer 5 is suspended, the first clutch 17 is engaged, and the second clutch 16 is suspended or engaged. The power output by the auxiliary motor 14 passes through the second input shaft 15 to the second constant mesh gear set, and then passes through the first output shaft 7 through the third constant mesh gear set 8 and the fourth constant mesh gear set 9, driving the first PTO output shaft 10 and the first differential input shaft 11 to rotate, so that the front drive wheel can move. The power flow is as shown in the attached figure. Figure 8 shown.

[0035] 5. The auxiliary motor 14 drives the front and rear drive wheels at the same time. This mode is suitable for plowing on slopes: the auxiliary motor 14 outputs power, the synchronizer 5 is suspended, the first clutch 17 and the second clutch 16 are engaged, and the power is input into the power coupling box through the second input shaft 15. At this time, the power is split, and a part of the power is transmitted to the first PTO output shaft 10 and the first differential input shaft 11 through the second constant mesh gear set 6, the third constant mesh gear set 8 and the fourth constant mesh gear set 9, thereby driving the front drive wheel; the other part of the power is transmitted to the second differential and the second PTO output shaft 21 through the first clutch 17, the second clutch 16, the fifth constant mesh gear set 19 and the sixth constant mesh gear set 20, thereby driving the rear drive wheel. The power flow is as shown in the attached figure. Fig. 9 shown.

[0036] 6. The main motor 1 and the auxiliary motor 14 drive the rear drive wheels at the same time. This mode is suitable for heavy-load plowing conditions on slopes: A. The main motor 1 and the auxiliary motor 14 jointly output power, the synchronizer 5 is engaged to the left, the first clutch 17 and the second clutch 16 are both engaged, the output power of the main motor 1 is transmitted to the first constant mesh gear set 4, and the output power of the auxiliary motor 14 is transmitted to the second PTO output shaft 21 and the second differential input shaft 22 through the fifth constant mesh gear set 19 and the sixth constant mesh gear set 20, thereby driving the rear drive wheels. The power flow is as shown in the attached figure. Fig.10 As shown;

[0037] B. The main motor 1 and the auxiliary motor 14 drive the front drive wheels at the same time. The main motor 1 and the auxiliary motor 14 output power, the synchronizer 5 is engaged to the right, the first clutch 17 is engaged, the main motor 1 outputs power and is transmitted to the second transmission gear through the synchronizer 5. At the same time, the auxiliary motor 14 outputs power to the third transmission. The second transmission gear and the third transmission gear are meshed with each other. The power of the two is transmitted to the first output shaft 7, and then transmitted to the first PTO output shaft 10 and the first differential input shaft 11 through the third constant meshing gear set 8 and the fourth constant meshing gear set 9, thereby driving the front drive wheels to meet the climbing requirements. The power flow is as shown in the attached figure. Fig.11 shown.

[0038] In order to intuitively display the operating status of the two motors, synchronizers and two clutches in each working mode, a table is presented as shown in Table 1. The combination status of the actuators in various working modes is shown in Table 1. In the table, "1" indicates that the motor is in working state, "0" indicates that the motor is not in working state, and "0" indicates that the clutch is in disengagement state. "L" indicates that the synchronizer is engaged to the left, "R" indicates that the synchronizer is engaged to the right, and " / " indicates that the synchronizer is not engaged, as shown in Table 1 below:

[0039]

[0040] Table 1

[0041] In summary, the present invention has the following advantages: 1. Through the dual-motor coupling method, different powers are allocated to different farming methods, thereby making farming more efficient and convenient. For example, different states of plowing and rotary tillage under different loads can be completed by three structures: main motor drive, auxiliary motor drive, and main motor and auxiliary motor coupling; 2. Through the front and rear drive wheel modes, agricultural machinery can adapt to driving on different terrains. For example, when turning at the end of a row in a hilly and mountainous area with small plots of land, the front and rear drive wheels can be flexibly driven to achieve a crab-like turn. If it is necessary to drive on a slope, the front and rear drive wheels need to be driven at the same time.

Claims

1. A dual-motor drive device for a hilly mountain tractor, the hilly mountain tractor comprising a front drive wheel with a first differential (12), a rear drive wheel with a second differential (23), a first rotary agricultural implement (13) and a second rotary agricultural implement (24); characterized in that: The dual-motor drive device comprises a main motor (1), an auxiliary motor (14) and a power coupling box (3); the power coupling box (3) is provided with a first input shaft (2) and a first output shaft (7) arranged coaxially, the first output shaft (7) is connected to a first differential (12) and a first rotary agricultural implement (13) via a gear set, and the first input shaft (2) is connected to the output end of the main motor (1); the power coupling box (3) is provided with a second input shaft (15) and a second output shaft (18) arranged coaxially, the second output shaft (18) is connected to a second differential (23) and a second rotary agricultural implement (24) via a gear set, The first input shaft (2) and the second output shaft (18) are connected, and the second input shaft (15) is connected to the output end of the auxiliary motor (14); a first constant meshing gear set (4) is provided between the first input shaft (2) and the second output shaft (18), and a second constant meshing gear set (6) is provided between the second input shaft (15) and the first output shaft (7); a synchronizer (5) matched with the first constant meshing gear set (4) and the second constant meshing gear set (6) is provided on the first input shaft (2); and a first clutch (17) matched with the first constant meshing gear set (4) and a second clutch (16) matched with the second constant meshing gear set (6) are provided on the second input shaft (15).

2. The dual-motor drive device for a hilly mountain tractor according to claim 1, characterized in that: The first constantly meshed gear set (4) comprises a first transmission gear (4-1) arranged on a first input shaft (2) and a fourth transmission gear (4-2) arranged on a second output shaft (18); the first transmission gear (4-1) and the fourth transmission gear (4-2) are meshed with each other.

3. The dual-motor drive device for a hilly mountain tractor according to claim 1, characterized in that: The second constantly meshing gear set (6) comprises a third transmission gear (6-2) arranged on the second input shaft (15) and a second transmission gear (6-1) arranged on the first output shaft (7), and the third transmission gear (6-2) and the second transmission gear (6-1) are meshed with each other.

4. The dual-motor drive device for a hilly mountain tractor according to claim 1, characterized in that: The first output shaft (7) is provided with a third constant mesh gear set (8) and a fourth constant mesh gear set (9); the output end of the third constant mesh gear set (8) is provided with a first PTO output shaft (10) connected to a first rotary agricultural implement (13); the output end of the fourth constant mesh gear set (9) is provided with a first differential input shaft (11) connected to a first differential (12).

5. The dual-motor driving device for a hilly mountain tractor according to claim 1, characterized in that: The second output shaft (18) is provided with a fifth constant mesh gear set (19) and a sixth constant mesh gear set (20); the output end of the fifth constant mesh gear set (19) is provided with a second PTO output shaft (21) connected to a second rotary agricultural implement (24); the output end of the sixth constant mesh gear set (20) is provided with a second differential input shaft (22) connected to a second differential (23).

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