Dual motor drive device for hilly land tractor

Abstract

The application discloses a double-motor driving device of a hilly land tractor, and belongs to the field of agricultural machinery. The hilly land tractor comprises a front driving wheel provided with a first differential (12), a rear driving wheel provided with a second differential (23), a first rotary farm implement (13) and a second rotary farm implement (24). The double-motor driving device comprises a main motor (1), an auxiliary motor (14) and a power coupling box (3). The double-motor driving device adopts a structure of synchronizer and double clutch, can realize switching of multiple working modes, is suitable for ploughing of multiple different terrains, greatly enhances the adaptability of agricultural machinery to the environment and improves the utilization rate of the electric motor.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural machinery equipment, in particular to a double-motor driving device of a hilly tractor. BACKGROUND

[0002] With the development of new energy, electric tractors emerge as the times require, which have the advantages of low noise, no pollution, no emission, simple and reliable, low use cost, etc. In order to solve the problem that the mechanical power of double electric motors cannot be output to the driving wheel or power take-off (PTO) at the same time, resulting in insufficient power of the whole machine under the working condition of full load output traction power and rotation power, there is a double-motor driven electric tractor power coupling device at present, for example, the Chinese invention patent with publication number CN111775723A discloses a power coupling device including a power battery, a whole machine controller connected with the power battery, a first inverter and a second inverter connected with the whole machine controller, a driving motor and a PTO motor connected with the first inverter and the second inverter respectively, a power coupling mechanism connected with the driving motor and the PTO motor, a transmission mechanism and a rotary tillage mechanism connected with the power coupling mechanism, and a driving wheel connected with the transmission mechanism. The power coupling device in the device mainly realizes the coupling of power through the combination of two planetary gear mechanisms and two synchronizer shift mechanisms working together, but the device still has the following problems: 1. In terms of structure, the power output by the power output shaft can only control the double driving wheels to drive, and the driving flexibility is insufficient when facing different terrains, and secondly, only single-sided agricultural implements, the position is not adjustable, and the use has limitations; 2. In terms of function, the device uses speed coupling, which is not suitable for hilly terrain; 3. In terms of mode, the device can switch less modes, and the application range is small. SUMMARY

[0003] The purpose of the present application is to provide a double-motor driving device of a hilly tractor. The present application adopts the structure of synchronizer and double clutch to realize the switching of multiple working modes and adapt to the cultivation of multiple different terrains, greatly enhancing the adaptability of agricultural machinery to the environment and improving the utilization rate of electric motors.

[0004] The technical scheme of the present application is a double-motor driving device of a hilly and mountainous tractor, the hilly and mountainous tractor comprising a front driving wheel with a first differential, a rear driving wheel with a second differential, a first rotary farm implement and a second rotary farm implement; the double-motor driving device comprising a main motor, an auxiliary motor and a power coupling box; the power coupling box being provided with coaxially arranged first input and output shafts, the first output shaft being connected with the first differential and the first rotary farm implement through a gear set, and the first input shaft being connected with the output end of the main motor; the power coupling box being provided with coaxially arranged second input and output shafts, the second output shaft being connected with the second differential and the second rotary farm implement through a gear set, and the second input shaft being connected with the output end of the auxiliary motor; the first input shaft and the second output shaft being provided with a first constant-mesh gear set, and the second input shaft and the first output shaft being provided with a second constant-mesh gear set; the first input shaft being provided with a synchronizer matched with the first and second constant-mesh gear sets; the second input shaft being provided with a first clutch matched with the first constant-mesh gear set and a second clutch matched with the second constant-mesh gear set.

[0005] In the double-motor driving device of the hilly and mountainous tractor, the first constant-mesh gear set comprises 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 in mesh.

[0006] In the double-motor driving device of the hilly and mountainous tractor, the second constant-mesh gear set comprises 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 in mesh.

[0007] In the double-motor driving device of the hilly and mountainous tractor, the first output shaft is provided with a third constant-mesh gear set and a fourth constant-mesh gear set, the output end of the third constant-mesh gear set is provided with a first PTO output shaft connected with the first rotary farm implement, and the output end of the fourth constant-mesh gear set is provided with a first differential input shaft connected with the first differential.

[0008] In the double-motor driving device of the hilly and mountainous tractor, the second output shaft is provided with a fifth constant-mesh gear set and a sixth constant-mesh gear set, the output end of the fifth constant-mesh gear set is provided with a second PTO output shaft connected with the second rotary farm implement, and the output end of the sixth constant-mesh gear set is provided with a second differential input shaft connected with the second differential.

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

[0010] 1、The present application, mainly two power sources, including the main motor and auxiliary motor, the main motor through the first input shaft to the synchronizer, the synchronizer can be left and first constant mesh gear set interface, power through the second output shaft to the second differential and the second rotary farm implements, synchronizer can also be right and second constant mesh gear set interface, power through the first output shaft to the first differential and the first rotary farm implements; auxiliary motor through the second input shaft power into, the first clutch and second constant mesh gear set interface, power by the first output shaft to the first differential and the first rotary farm implements; if the first clutch and the first constant mesh gear set interface, then the power by the second output shaft to the second differential and the second rotary farm implements; the present application is mainly through two clutches and a synchronizer to realize the different flow direction of power, so as to obtain different working mode, meet a variety of working conditions, use a variety of different terrain cultivation, greatly enhance the adaptability of agricultural machinery to the environment, improve the utilization rate of motor.

[0011] 2、The present application is mainly through torque coupling to realize the switching of multiple modes, adapt to the complex terrain of hilly.

[0012] 3、According to the actual terrain, the corresponding position of the rotary farm implements is rotated, the flexibility of use is improved. DETAILED DESCRIPTION

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

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

[0015] Figure 3 It is a schematic diagram of the main motor driving the front and rear drive wheels simultaneously in the first working condition;

[0016] Figure 4 It is a schematic diagram of the main motor driving the front and rear drive wheels simultaneously in the second working condition;

[0017] Figure 5 It is a schematic diagram of the main motor and auxiliary motor driving the front and rear drive wheels simultaneously in the first working condition;

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

[0019] Figure 7 It is a schematic diagram of the auxiliary motor controlling the rear drive wheel alone;

[0020] Figure 8 It is a schematic diagram of the auxiliary motor controlling the front drive wheel alone;

[0021] Figure 9Schematic diagram for auxiliary motor to drive front and rear drive wheels simultaneously;

[0022] Figure 10 Schematic diagram for main and auxiliary motors to drive rear drive wheels simultaneously;

[0023] Figure 11 Schematic diagram for main and auxiliary motors to drive front drive wheels simultaneously.

[0024] Explanation of the reference signs in the drawing: 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 farm implement; 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 farm implement. DETAILED DESCRIPTION

[0025] The application will be further described below in conjunction with the drawing and examples, but not as a basis for limiting the application.

[0026] The embodiment is a double-motor driving device of a hilly land tractor, the hilly land tractor comprising a front driving wheel with a first differential 12, a rear driving wheel with a second differential 23, a first rotary farm implement 13 and a second rotary farm implement 24; the double-motor driving device comprises a main motor 1, an auxiliary motor 14 and a power coupling box 3; the power coupling box 3 is internally provided with coaxially arranged first input shaft 2 and first output shaft 7, the first input shaft and the first output shaft are not connected, the first output shaft 7 is connected with the first differential 12 and the first rotary farm implement 13 through a gear set respectively, the first input shaft 2 is connected with the output end of the main motor 1, the power coupling box 3 is internally provided with coaxially arranged second input shaft 15 and second output shaft 18, the second output shaft 18 is connected with the second differential 23 and the second rotary farm implement 24 through a gear set respectively, the second input shaft 15 is connected with the output end of the auxiliary motor 14; the first input shaft 2 and the second output shaft 18 are provided with a first constant-mesh gear set 4, the second input shaft 15 and the first output shaft 7 are provided with a second constant-mesh gear set 6; the first input shaft 2 is provided with a synchronizer 5 matched with the first constant-mesh gear set 4 and the second constant-mesh gear set 6 respectively, the power transmission between the first input shaft and the first output shaft is mainly realized by the synchronizer matched with the first constant-mesh gear set and the second constant-mesh gear set respectively; the second input shaft 15 is matched with the first constant-mesh gear set 4 and the second constant-mesh gear set 6 through a clutch structure respectively, 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, the first clutch 17 and the second clutch 16 are coaxially connected, and thus the structure effectively saves the space of the whole transmission system.

[0027] The first constant-mesh gear set 4 comprises 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, the first transmission gear 4-1 and the fourth transmission gear 4-2 are engaged; the second constant-mesh 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, the third transmission gear 6-2 and the second transmission gear 6-1 are engaged.

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

[0029] The application combines different working modes through two clutches and a synchronizer, mainly including the following modes:

[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 right engaged, the first clutch 17 and the second clutch 16 are not engaged, 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 mesh gear set 6, so as to drive the first rotary agricultural implement 13 and the front drive wheel, and the power transmission flow is as shown in the accompanying Figure 1 B. The main motor 1 outputs power, the auxiliary motor 14 does not work, the synchronizer 5 is left engaged, the first clutch 17 and the second clutch 16 are engaged, 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 first constant mesh gear set 4 and the second constant mesh gear set 6, and the third constant mesh gear set 8 and the fourth constant mesh gear set 9, so as to drive the first rotary agricultural implement 13 and the front drive wheel, and the power transmission flow is as shown in the accompanying Figure 2 .

[0031] 2. The main motor 1 drives the front and rear drive wheels simultaneously, which is suitable for the light load rotary tillage working condition on the slope: A. The main motor 1 outputs power, the auxiliary motor 14 does not work, the synchronizer 5 is left engaged, the first clutch 17 and the second clutch 16 are engaged, the power is transmitted to the second output shaft 18 through the first constant mesh gear set 4, and the power is branched at this point, one 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, so as to drive the second rotary agricultural implement 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, so as to drive the front drive wheel, and this power combination form meets the slope with relatively gentle terrain, and the power transmission flow is as shown in the accompanying Figure 3B. The main motor 1 outputs power, the auxiliary motor 14 does not work, the synchronizer 5 is engaged on the right, the first clutch 17 and the second clutch 16 are both engaged, power is transmitted to the second constant mesh gear set 6 through the first input shaft 2, at this point, power is split, 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 to the first PTO output shaft 10 and the first differential input shaft 11, thereby driving the front drive wheels; 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 to the second PTO output shaft 21 and the second differential input shaft 22, thereby driving the second rotating farm implement 24 and the rear drive wheels, the power transmission flow is as shown in the attached Figure 4

[0032] 3. The main motor 1 and the auxiliary motor 14 drive the front and rear drive wheels at the same time, which is suitable for working conditions that require high power, such as light load rotary plowing in mountains, heavy load plowing in mountains, and medium load plowing in mountains: A. The main motor 1 and the auxiliary motor 14 output power at the same time, the synchronizer 5 is engaged on the left, the first clutch 17 and the second clutch 16 are engaged, the main motor 1 outputs power through the first input shaft 2 to the first constant mesh gear set 4, at this point, power is split, part of the power is transmitted to the fifth constant mesh gear set 19 and the sixth constant mesh gear set 20, and at the same time, the auxiliary motor 14 outputs power through the first clutch 17 and the second clutch 16 to be coupled to the second differential input shaft 22 and the second PTO output shaft 21, thereby driving the rear drive wheels and the second rotating farm implement 24, the main motor and the auxiliary motor output part of the power to drive the rear drive wheels and the second rotating farm implement together; the other 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, the other part of the power output by the auxiliary motor 14 is transmitted to the second constant mesh gear set 6 through the second input shaft 15, the third constant mesh gear set 8 and the fourth constant mesh gear set 9, and then to the first differential input shaft 11, thereby driving the front drive wheels, the front and rear drive wheels work at the same time, meet the climbing power, the power flow is as shown in the attached Figure 5 ​Figure 1 shows the power flow when the main motor 1 and auxiliary motor 14 jointly control the front drive wheels. The main motor 1 outputs power, the auxiliary motor 14 outputs power, the synchronizer 5 is engaged on the right, the first clutch 17 and the second clutch 16 are engaged, the power output by 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 by the auxiliary motor 14 to be transmitted to the first differential input shaft 11 and the first PTO output shaft 10 through the third constant mesh gear set 8 and the fourth constant mesh gear set 9, and the power output by the main motor and the auxiliary motor is partially transmitted on the first differential input shaft 11 and the first PTO output shaft 10, so as to jointly drive the front drive wheels; the other part of the power output by 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 by the auxiliary motor 14 to be 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 to the second differential input shaft 22 and the second PTO output shaft 21, so as to jointly drive the rear drive wheels and the second rotary farm implement 24, and meet the climbing power requirement. The power flow is shown in Figure 1. Figure 6

[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 does not engage 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 is transmitted to the fifth constant mesh gear set and the sixth constant mesh gear set through the second input shaft 15 and the second output shaft 18, to drive the second PTO output shaft 21 and the second differential input shaft 22 to rotate and drive the rear drive wheels to walk. The power flow is shown in Figure 4. Figure 7

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

[0035] ​​​5、Auxiliary motor 14 drives front and rear drive wheels at the same time, this mode is suitable for plowing in the slope: by auxiliary motor 14 output power, synchronizer 5 is suspended, the first clutch 17 and the second clutch 16 are engaged, power is input into the power coupling box through the second input shaft 15, at this time the power is split, one 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, so as to drive 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, so as to drive the rear drive wheel, the power flow is shown in the attached Figure 9 figure.

[0036] 6、Main motor 1 and auxiliary motor 14 drive rear drive wheels at the same time, this mode is suitable for plowing in the slope under heavy load working condition: A. by main motor 1 and auxiliary motor 14 output power, synchronizer 5 is engaged to the left, the first clutch 17 and the second clutch 16 are engaged, the main motor 1 outputs power to the first constant mesh gear set 4, at the same time the auxiliary motor 14 outputs power 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, so as to drive the rear drive wheel, the power flow is shown in the attached Figure 10 figure.

[0037] B. main motor 1 and auxiliary motor 14 drive front drive wheels at the same time, by main motor 1 and auxiliary motor 14 output power, synchronizer 5 is engaged to the right, the first clutch 17 is engaged, the main motor 1 outputs power 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 engaged 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 mesh gear set 8 and the fourth constant mesh gear set 9, so as to drive the front drive wheel, meet the climbing, the power flow is shown in the attached Figure 11 figure.

[0038] In order to intuitively show the running state of the two motors, the synchronizer and the two clutches in each working mode, the table form is used to show, as shown in table 1, the combination state of the execution element in each working mode is shown in table 1, "1" in the table represents that the motor is in working state, "0" represents that the motor is in non-working state, "0" represents that the clutch is in separation state. "L" represents that the synchronizer is engaged to the left, "R" represents that the synchronizer is engaged to the right, " / " represents that the synchronizer is not engaged, as shown in the following table 1:

[0039]

[0040] Table 1

[0041] In summary, the present application has the following advantages: 1. Through the coupling of dual motors, different power is allocated to different farming methods, so that farming is more efficient and convenient, such as different states of plowing and rotary plowing under different loads, different farming methods are completed through three structures of main motor driving, auxiliary motor driving and coupling of main motor and auxiliary motor; 2. Through the front and rear drive wheel mode, the agricultural machinery is adapted to travel in different terrains, such as when turning around in the hilly and mountainous area with small plots, the front and rear drive wheels can be flexibly driven to realize crab walking type turning, and if it is necessary to travel on a slope, the front and rear drive wheels need to be driven at the same time.

Claims

1. A dual-motor drive system 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 implement (13), and a second rotary implement (24); characterized in that: The dual-motor drive device includes a main motor (1), an auxiliary motor (14), and a power coupling box (3). The power coupling box (3) is equipped with a first input shaft (2) and a first output shaft (7) arranged coaxially. The first output shaft (7) is connected to the first differential (12) and the first rotary agricultural implement (13) via 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 equipped with a second input shaft (15) and a second output shaft (18) arranged coaxially. The second output shaft (18) is connected to the second differential (23) and the second rotary agricultural implement (24) via a gear set. The second input shaft (15) is connected to the output end of the auxiliary motor (14); a first constant mesh gear set (4) is provided between the first input shaft (2) and the second output shaft (18), and a second constant mesh gear set (6) is provided between the second input shaft (15) and the first output shaft (7); a synchronizer (5) is provided on the first input shaft (2) to cooperate with the first constant mesh gear set (4) and the second constant mesh gear set (6); the second input shaft (15) is provided with a first clutch (17) to cooperate with the first constant mesh gear set (4) and a second clutch (16) to cooperate with the second constant mesh gear set (6). 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 rotating 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 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 implement (24). 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).

2. The dual-motor drive device for a hilly and mountainous tractor according to claim 1, characterized in that: The first constant mesh gear set (4) includes a first transmission gear (4-1) disposed on the first input shaft (2) and a fourth transmission gear (4-2) disposed on the second output shaft (18), wherein the first transmission gear (4-1) and the fourth transmission gear (4-2) mesh with each other.

3. The dual-motor drive device for a hilly and mountainous tractor according to claim 1, characterized in that: The second constant mesh gear set (6) includes a third transmission gear (6-2) disposed on the second input shaft (15) and a second transmission gear (6-1) disposed on the first output shaft (7), wherein the third transmission gear (6-2) and the second transmission gear (6-1) mesh with each other.

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