CN219339191U

CN219339191U - Double-motor coupling transmission device and agricultural machinery

Info

Publication number: CN219339191U
Application number: CN202320023693.0U
Authority: CN
Inventors: 李业彬; 刘延斌
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-07-14
Anticipated expiration: 2033-01-05

Abstract

The utility model provides a double-motor coupling transmission device and agricultural machinery, wherein the double-motor coupling transmission device comprises an input assembly, an output assembly, a gear shifting mechanism and a transmission gear set connected with the input assembly and the output assembly; the input assembly comprises a first input shaft connected with the first motor and a second input shaft connected with the second motor; the output assembly comprises a first output shaft connected with the running mechanism and a second output shaft connected with the power output mechanism, and a clutch is arranged on the second output shaft; the gear shifting mechanism is used for being combined with or separated from the transmission gear set, and the gear shifting mechanism is matched with the clutch to control the power output direction of the first input shaft and the second input shaft. The complex coupling device is omitted, the power output directions of the first input shaft and the second input shaft can be controlled only according to the required working mode through the matching state of the gear shifting mechanism and the transmission gear set and the working state of the clutch, and the structure is simple, so that the transmission efficiency is improved.

Description

Double-motor coupling transmission device and agricultural machinery

Technical Field

The utility model belongs to the technical field of power transmission, and particularly relates to a double-motor coupling transmission device and an agricultural machine.

Background

At present, most of tractors on the market still use diesel engines as power sources, and the traditional diesel tractor and a manual gearbox are used as power transmission chains, so that the noise is large, the gear shifting impact is large, the efficiency is low, the environment is seriously polluted, and the operation intensity of a driver is high. The electric tractor drives the vehicle by using electric energy, and compared with the traditional diesel tractor, the electric tractor has the advantages of low emission, cleanness, no pollution, low noise, high energy utilization rate and the like, and can realize no power interruption gear shifting through the double-motor power coupling device, thereby remarkably improving the comfort. However, the common double-motor power coupling device generally adopts two sets of rotating speed coupling devices and a double-acting clutch, and has the advantages of complex structure and low transmission efficiency.

Disclosure of Invention

The utility model mainly aims to provide a double-motor coupling transmission device and agricultural machinery, and aims to solve the technical problem that the transmission efficiency of the double-motor coupling transmission device in the prior art is affected due to complex structure.

In order to achieve the above object, the present utility model provides a dual-motor coupling transmission device, comprising:

the input assembly comprises a first input shaft connected with the first motor and a second input shaft connected with the second motor;

the output assembly comprises a first output shaft connected with the running mechanism and a second output shaft connected with the power output mechanism, and a clutch is arranged on the second output shaft;

the transmission gear set is connected with the input assembly and the output assembly; and

and the gear shifting mechanism is used for being combined with or separated from the transmission gear set, and is matched with the clutch to control the power output direction of the first input shaft and the second input shaft.

In an embodiment of the utility model, the clutch is located on the second output shaft;

the second input shaft is rotatably and coaxially sleeved outside the first input shaft; or alternatively, the first and second heat exchangers may be,

the first input shaft and the second input shaft are not coaxially and independently arranged.

In an embodiment of the present utility model, the dual-motor coupling transmission device further includes an intermediate shaft, the shift mechanism includes a first shift transmission member and a second shift transmission member, the first shift transmission member is used for controlling transmission on-off of the first input shaft and the first output shaft, and the second shift transmission member is disposed on the intermediate shaft and is used for controlling transmission on-off of the second input shaft and the first output shaft.

In an embodiment of the utility model, the first gear change transmission is provided on the first output shaft.

In an embodiment of the utility model, the transmission gear set comprises a first gear set, a second gear set, a third gear set and a fourth gear set, wherein the first gear set is in transmission connection with the second input shaft and the intermediate shaft, the second gear set is in transmission connection with the first input shaft, the intermediate shaft and the first output shaft, and the intermediate shaft of the third gear set and the fourth gear set is in transmission connection with the first output shaft.

In an embodiment of the utility model, the first gear set includes a first driving gear and a first driven gear that intermesh; the second gear set comprises a second driving gear, a second driven gear and a third driven gear which are meshed with each other, the third gear set comprises a fourth driven gear and a fourth driving gear which are meshed with each other, and the fourth gear set comprises a fifth driving gear and a fifth driven gear which are meshed with each other;

the first driving gear is coaxially connected to the second input shaft, and the second driving gear is arranged on the first input shaft; the first driven gear, the second driven gear, the fourth driven gear and the fifth driving gear are sequentially arranged on the intermediate shaft along the power transmission direction; the third driven gear, the fourth driving gear and the fifth driven gear are sequentially arranged on the first output shaft along the power transmission direction, the first gear shifting transmission piece is used for switching and controlling the transmission on-off of the third driven gear and the first output shaft, and the second gear shifting transmission piece is used for switching and controlling the transmission on-off of the fourth driven gear or the fifth driving gear and the intermediate shaft.

In an embodiment of the utility model, the first gear shifting transmission is provided on the first input shaft.

In an embodiment of the utility model, the drive gear set comprises a first gear set, a second gear set and a third gear set, wherein the first gear set is in drive connection with the first input shaft and the intermediate shaft, the second gear set is in drive connection with the first input shaft, the intermediate shaft and the second output shaft, and the third gear set is in drive connection with the intermediate shaft, the second input shaft and the second output shaft.

In an embodiment of the utility model, the first gear set comprises a first driving gear and a first driven gear which are sequentially meshed, the second gear set comprises a second driving gear, a second driven gear and a third driven gear, and the third gear set comprises a fourth driven gear, a fourth driving gear and a driven gear;

the first driving gear and the second driving gear are sequentially connected to the first input shaft along the power transmission direction, the first driven gear, the second driven gear and the fourth driven gear are sequentially connected to the intermediate shaft along the power transmission direction, the third driven gear is connected to the first output shaft, the fourth driven gear is connected to the second input shaft, the driven gear is connected to the second output shaft, the first gear shifting transmission piece is used for switching and controlling transmission on-off between the first driving gear or the second driving gear and the first input shaft, and the second gear shifting transmission piece is used for switching and controlling transmission on-off between the fourth driven gear and the intermediate shaft.

In an embodiment of the present utility model, the first and second shift gears are each one of a shift synchronizer, a sliding sleeve shift, or a tooth sleeve shift.

In an embodiment of the utility model, an agricultural machine is also presented, comprising a double motor coupled transmission as described above.

Through the technical scheme, the double-motor coupling transmission device provided by the embodiment of the utility model has the following beneficial effects:

a transmission gear set is in transmission connection between the input assembly and the output assembly, so that the power transmission from the input assembly to the output assembly is ensured; meanwhile, a clutch is arranged on the output assembly, and the clutch can be used for connecting or disconnecting the first input shaft and the second output shaft in a transmission way; when the transmission mechanism works, the gear shifting mechanism is controlled to be combined with or separated from the transmission gear set according to a required working mode, and meanwhile, the on-off state of the clutch and the output assembly is controlled to selectively output transmission power of the first motor and/or the second motor to the first output shaft and/or the second output shaft. According to the power transmission device, the connection state of the gear shifting mechanism and the transmission gear set and the working state of the clutch can be correspondingly selected according to the working mode required by the tractor in the power transmission process, so that corresponding power is output, the utilization rate of a motor is improved, a complex rotating speed coupling device is omitted, and the integral transmission efficiency is improved while the structure is simplified.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide an understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

FIG. 1 is a schematic diagram of a transmission structure of a dual-motor coupled transmission in accordance with a first embodiment of the present utility model;

fig. 2 is a schematic diagram of a transmission structure of a dual-motor coupling transmission according to a second embodiment of the present utility model.

Description of the reference numerals

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present utility model.

The double motor coupling transmission according to the present utility model and the agricultural machine will be described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, in an embodiment of the present utility model, there is provided a dual motor coupling transmission device including:

an input assembly comprising a first input shaft 12 connected to a first motor 11 and a second input shaft 14 connected to a second motor 13;

the output assembly comprises a first output shaft 21 connected with a running gear 22 and a second output shaft 23 connected with a power output mechanism 24, in order to adapt to different working requirements: the second output shaft 23 is in transmission connection with the first input shaft 12, and a clutch 90 is arranged on the second output shaft 23;

a shift mechanism for engaging with or disengaging from the drive gear set, the shift mechanism cooperating with the clutch 90 to control the power output direction of the first input shaft 12 and the second input shaft 14.

The transmission gear set is arranged to play a role of connecting the input assembly and the output assembly in the middle, so that power transmission from the input assembly to the output assembly is ensured; meanwhile, by arranging the gear shifting mechanism which is combined with or separated from the transmission gear set, in the power transmission process, the connection state of the gear shifting mechanism and the transmission gear set can be correspondingly selected according to the working mode required by the tractor, so that corresponding power is output, the utilization rate of a motor is improved, a complex rotating speed coupling device is omitted, the overall transmission efficiency is improved, and the energy is saved. And, in order to adapt to different work demands: a clutch 90 is provided on the second output shaft 23 for rotary tillage or running. Compared with the structure of the double-acting clutch 90 adopted in the prior art, the power transmission of the first input shaft 12 and the second output shaft 23 can be cut off or communicated by adopting the clutch 90, the structure for controlling power is simplified, and when power transmission is carried out to the power output mechanism 24, the first input shaft 12 is directly input and connected with the second output shaft 23, so that the transmission efficiency is improved.

As shown in fig. 1, in the first embodiment of the present utility model, the first motor 11 and the second motor 13 are coaxially arranged, and the second input shaft 14 is rotatably coaxially sleeved outside the first input shaft 12, the dual-motor coupling transmission device further includes an intermediate shaft 80, the shift mechanism includes a first shift transmission member 31 and a second shift transmission member 32, the first shift transmission member 31 is disposed on the first output shaft 21 and is used for controlling transmission on/off of the first input shaft 12 and the first output shaft 21, and the second shift transmission member 32 is disposed on the intermediate shaft 80 and is used for controlling transmission on/off of the second input shaft 14 and the first output shaft 21.

In the coaxial double-motor power system, in order to realize the transmission structure form of the coaxial double-motor, the arrangement form of the transmission gear set and the gear shifting mechanism is required to be adjusted in order to realize the coupling of the double-motor; specifically, the drive gear sets include a first gear set 40, a second gear set 50, a third gear set 60, and a fourth gear set 70 in series, the first gear set 40 is in driving connection with both the second input shaft 14 and the intermediate shaft 80, the second gear set 50 is in driving connection with both the first input shaft 12, the intermediate shaft 80, and the first output shaft 21, and the third gear set 60 and the fourth gear set 70 are in driving connection with both the intermediate shaft 80 and the first output shaft 21.

Wherein the first gear set 40 includes a first driving gear 41 and a first driven gear 42 which are engaged with each other; the second gear set 50 includes a second driving gear 51, a second driven gear 52 and a third driven gear 53 which are meshed with each other, the third gear set 60 includes a fourth driven gear 61 and a fourth driving gear 62 which are meshed with each other, and the fourth gear set 70 includes a fifth driving gear 71 and a fifth driven gear 72 which are meshed with each other;

in detail, the first driving gear 41 is coaxially and fixedly connected to the second input shaft 14, and the second driving gear 51 is fixedly mounted on the first input shaft 12; the first driven gear 42, the second driven gear 52, the fourth driven gear 61 and the fifth driving gear 71 are sequentially arranged on the intermediate shaft 80 along the power transmission direction, wherein the first driven gear 42 is fixedly connected with the intermediate shaft 80, and the second driven gear 52, the fourth driven gear 61 and the fifth driven gear 71 are all sleeved on the intermediate shaft 80 in an empty mode; the third driven gear 53, the fourth driving gear 62 and the fifth driven gear 72 are sequentially arranged on the first output shaft 21 along the power transmission direction, the third driven gear 53 is sleeved on the first output shaft 21, and the fourth driving gear 62 and the fifth driven gear 72 are fixedly connected with the first output shaft 21; the first shift transmission member 31 switches and controls the transmission on/off of the three driven gears and the first output shaft 21, and the second shift transmission member 32 switches and controls the transmission on/off of the fourth driven gear 61 or the fifth driving gear 71 and the intermediate shaft 80.

(1) Ploughing mode

When the required working mode is a plowing mode, the control clutch 90 is disengaged, the first shifting transmission member 31 is combined with the third driven gear 53, the second shifting transmission member 32 is combined with the fourth driven gear 61 or the fifth driving gear 71, and the first motor 11 and the second motor 13 are in torque coupling on the first output shaft 21, so that the two power of the first motor 11 and the second motor 13 are coupled, and meanwhile, output power is provided for the running mechanism 22 to promote traction; the second motor 13 realizes the main control of the vehicle speed in the traction process, and can control the second gear shifting transmission member 32 to select different working gears according to different plowing speeds and traction force requirements. Under this plough mode, because the resistance of traveling of field is great this moment, this application carries out torque coupling with the power of input being used for first motor 11 and second motor 13 under this mode, can show improvement tractor traction force, reduces single motor power demand to make the tractor normally travel under the plough mode.

(2) Rotary tillage light load mode

Since the rotary tillage mode is divided into the rotary tillage light load mode and the rotary tillage heavy load mode, when the required operation mode is the rotary tillage light load mode, the first shift transmission member 31 is controlled to be disengaged from the third driven gear 53, the second shift transmission member 32 is combined with the fourth driven gear 61 or the fifth driving gear 71, and the clutch 90 is combined with the second output shaft 23. In this way, the power of the second input shaft 14 of the second motor 13 is transmitted to the first output shaft 21 through the third gear set 60, so that the second motor 13 is mainly responsible for the walking power output operation; the first input shaft 12 of the first motor 11 is in transmission connection with the second output shaft 23, the first motor 11 is responsible for rotary tillage power output, and two power rotating speeds of the first motor 11 and the second motor 13 are decoupled, so that different rotary tillage speed requirements can be met.

(3) Rotary tillage heavy load mode

When the required working mode is a rotary tillage heavy-duty mode, the power required by rotary tillage is larger, and the rotary tillage power provided by the first motor 11 alone cannot meet the heavy-duty requirement, so that in the mode, the control clutch 90 is combined with the second output shaft 23, and the first input shaft 12 and the second output shaft 23 are in transmission connection; the first shift transmission member 31 is combined with the third driven gear 53, the second shift transmission member 32 is positioned at the left/right position, the first motor 11 and the second motor 13 are together responsible for rotary tillage power output, meanwhile, the first motor 11 drives the vehicle to walk by partial power, the running mechanism 22 and the power output mechanism 24 are coupled, and the tractor walks at a certain fixed speed, so that the rotary tillage operation can be ensured to be normally carried out under the walking power.

(4) Transition mode

When the required operation mode is the transfer mode, the control clutch 90 is disengaged from the second output shaft 23, the first shift transmission member 31 is engaged with the third driven gear 53, the second shift transmission member 32 is shifted to the left/right position, and the first motor 11 and/or the second motor 13 outputs transmission power to the first output shaft 21. In the mode, the single motor and the double motors can be selected to work together according to different transfer vehicle speeds, so that the motors work in a high-efficiency area. The double motors or the single motor are selected to drive the transition work, and the transition work is determined according to the opening or closing conditions of the two motors; when the two motors are used and both motors are turned on, in the transfer mode, the two motors simultaneously output power to the running mechanism 22 for transfer work; when one of the motors is on and the other motor is off, the on-duty motor alone outputs power to the running gear 22 and provides the transition work power. When a single motor is used, the gear shifting transmission piece corresponding to the single motor is combined, and the other gear shifting transmission piece is in a disconnected state.

According to the power control method and the power control device, the power requirements of a single motor can be reduced by controlling the coupling or uncoupling of the double motors according to different operation mode power and rotating speed requirements, the utilization rate of the motor is improved, the motor with small power can be selected to meet the design requirements under the same tractor working requirements, and the product cost is reduced. The motor can work in a high-efficiency area through a control strategy, the working efficiency is high, and the energy digestion is reduced. And when one of the gear shifting transmission members performs gear shifting operation, continuous power is output to the running mechanism 22, so that the power is not interrupted in the gear shifting process, and the driving comfort of the tractor is greatly improved.

As shown in fig. 2, in the second embodiment of the present utility model, at this time, the two motors are not coaxially and separately arranged, the dual-motor coupling transmission device further includes an intermediate shaft 80, and the shift mechanism includes a first shift transmission member 31 and a second shift transmission member 32, the first shift transmission member 31 is provided on the first input shaft 12, and the second shift transmission member 32 is provided on the intermediate shaft 80.

Preferably, the drive gear sets include a first gear set 40, a second gear set 50 and a third gear set 60, the first gear set 40 is in driving connection with the first input shaft 12 and the intermediate shaft 80, the second gear set 50 is in driving connection with the first input shaft 12, the intermediate shaft 80 and the first output shaft 21, and the third gear set 60 is in driving connection with the intermediate shaft 80, the second input shaft 14 and the second output shaft 23.

Specifically, the first gear set 40 includes a first driving gear 41 and a first driven gear 42 that are sequentially engaged, the second gear set 50 includes a second driving gear 51, a second driven gear 52, and a third driven gear 53, and the third gear set 60 includes a fourth driven gear 61, a fourth driving gear 62, and a driven gear 63;

the first driving gear 41 and the second driving gear 51 are sequentially connected to the first input shaft 12 along the power transmission direction, the first driven gear 42, the second driven gear 52 and the fourth driven gear 61 are sequentially connected to the intermediate shaft 80 along the power transmission direction, the third driven gear 53 is connected to the first output shaft 21, the fourth driving gear 62 is connected to the second input shaft 14, the driven wheel 63 is connected to the second output shaft 23, the first shift transmission member 31 is used for switching and controlling transmission on/off between the first driving gear 41 or the second driving gear 51 and the first input shaft 12, and the second shift transmission member 32 is used for switching and controlling transmission on/off between the fourth driven gear 61 and the intermediate shaft 80.

Similarly, four modes of operation are described in detail as follows:

(1) Ploughing mode

When the required operation mode is the plowing mode, the control clutch 90 is disengaged from the second output shaft 23, the first shift transmission member 31 is combined with the first driving gear 41 or the second driving gear 51, the second shift transmission member 32 is combined with the fourth driven gear 61, the first motor 11 and the second motor 13 are torque-coupled on the first output shaft 21 to promote traction force, and the first shift transmission member 31 can be controlled to select different operation gears according to the plowing speed and traction force requirements.

(2) Rotary tillage light load mode

When the required working mode is rotary tillage light-load mode, the control clutch 90 is combined with the second output shaft 23, meanwhile, the second shifting transmission member 32 is separated from the fourth driven gear 61, the first shifting transmission member 31 is combined with the first driving gear 41 or the second driving gear 51, and the input power of the first motor 11 is transmitted to the first output shaft 21 through the intermediate shaft 80, so that the first motor 11 mainly drives the vehicle to run; the input power of the second motor 13 is transmitted to the second output shaft 23 through the fourth driving gear 62, so that the second motor 13 is responsible for rotary tillage power output, and the running mechanism 22 and the power output mechanism 24 are decoupled, so that different rotary tillage speed requirements can be met.

(3) Rotary tillage heavy load mode

When the required working mode is rotary tillage heavy-duty mode, the control clutch 90 is combined with the second output shaft 23, the second gear shifting transmission member 32 is combined with the fourth driven gear 61, the first gear shifting transmission member 31 is combined with the first driving gear 41 or the second driving gear 51, at this time, the first motor 11 and the second motor 13 are together responsible for rotary tillage power output, part of the power of the first motor 11 is responsible for rotary tillage operation walking, the running mechanism 22 and the power output mechanism 24 are coupled, and the rotary tillage speed is at a certain fixed speed.

(4) Transition mode

When the required operation mode is the transfer mode, the control clutch 90 is disengaged from the second output shaft 23, the first shift transmission member 31 is in the left/right position, the second shift transmission member 32 is coupled with the fourth driven gear 61, and the first motor 11 and/or the second motor 13 outputs transmission power to the first output shaft 21. In the mode, the single motor and the double motors can be selected to work together according to different transfer vehicle speeds, so that the motors work in a high-efficiency area. The double motors or the single motor are selected to drive the transition work, and the transition work is determined according to the opening or closing conditions of the two motors; when the two motors are used and both motors are turned on, in the transfer mode, the two motors simultaneously output power to the running mechanism 22 for transfer work; when one of the motors is on and the other motor is off, the on-duty motor alone outputs power to the running gear 22 and provides the transition work power. When a single motor is used, the gear shifting transmission piece corresponding to the single motor is combined, and the other gear shifting transmission piece is in a disconnected state.

In summary, in both the first embodiment and the second embodiment, the cylindrical gear is adopted for power transmission, so that the transmission efficiency is high, only 8-9 gears are needed in the whole system, and the system reliability is high. In addition, the intermediate shaft 80 of the first embodiment or the second embodiment plays a role of intermediate connection, that is, the power input by the first input shaft 12 or the second input shaft 14 is transmitted and output through the intermediate shaft 80, so that the power input direction (the first input shaft 12 or the second input shaft 14 or both of them are input at the same time) can be better selected, the power is not interrupted in the gear shifting process, and the driving comfort of the agricultural machinery is improved.

In addition, the first shift transmission member 31 and the second shift transmission member 32 are each one of a shift synchronizer, a sliding sleeve shift member or a tooth sleeve shift member, and the specific type of shift transmission member to be used can be determined according to actual requirements.

In an embodiment of the utility model, an agricultural machine is also presented, comprising a double motor coupled transmission as described above. Since the farm machine includes all embodiments of the dual-motor coupling transmission, all the advantages of the dual-motor coupling transmission are not described in detail herein.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. A dual motor coupling transmission comprising:

an input assembly comprising a first input shaft (12) connected to a first motor (11) and a second input shaft (14) connected to a second motor (13);

an output assembly provided with a clutch (90) and comprising a first output shaft (21) connected to the running gear (22) and a second output shaft (23) connected to the power take-off mechanism (24);

a drive gear set connecting the input assembly and the output assembly; and

and a shift mechanism for engaging with or disengaging from the transmission gear set, the shift mechanism cooperating with the clutch (90) to control the power output direction of the first input shaft (12) and the second input shaft (14).

2. The double motor coupling transmission according to claim 1, characterized in that the clutch (90) is located on the second output shaft (23);

the second input shaft (14) is rotatably and coaxially sleeved outside the first input shaft (12); or alternatively, the first and second heat exchangers may be,

the first input shaft (12) and the second input shaft (14) are not coaxially and independently arranged.

3. The double-motor coupling transmission device according to claim 2, further comprising an intermediate shaft (80), wherein the gear shifting mechanism comprises a first gear shifting transmission member (31) and a second gear shifting transmission member (32), the first gear shifting transmission member (31) is used for controlling transmission on-off of the first input shaft (12) and the first output shaft (21), and the second gear shifting transmission member (32) is arranged on the intermediate shaft (80) and is used for controlling transmission on-off of the second input shaft (14) and the first output shaft (21).

4. A double motor coupling transmission according to claim 3, characterized in that the first gear change transmission (31) is provided on the first output shaft (21).

5. The dual motor coupled transmission of claim 4, wherein the transmission gear sets include a first gear set (40), a second gear set (50), a third gear set (60), and a fourth gear set (70), the first gear set (40) is in driving connection with both the second input shaft (14) and the intermediate shaft (80), the second gear set (50) is in driving connection with both the first input shaft (12), the intermediate shaft (80), and the first output shaft (21), and the third gear set (60) and the fourth gear set (70) are in driving connection with both the intermediate shaft (80) and the first output shaft (21).

6. The double motor coupling transmission according to claim 5, characterized in that the first gear set (40) comprises a first driving gear (41) and a first driven gear (42) that are intermeshed; the second gear set (50) comprises a second driving gear (51), a second driven gear (52) and a third driven gear (53) which are meshed with each other, the third gear set (60) comprises a fourth driven gear (61) and a fourth driving gear (62) which are meshed with each other, and the fourth gear set (70) comprises a fifth driving gear (71) and a fifth driven gear (72) which are meshed with each other;

wherein the first driving gear (41) is coaxially connected to the second input shaft (14), and the second driving gear (51) is mounted on the first input shaft (12); the first driven gear (42), the second driven gear (52), the fourth driven gear (61) and the fifth driving gear (71) are sequentially and all connected with the intermediate shaft (80) in a transmission manner along the power transmission direction; the third driven gear (53), the fourth driving gear (62) and the fifth driven gear (72) are sequentially arranged on the first output shaft (21) along the power transmission direction, the first gear shifting transmission piece (31) is used for switching and controlling the transmission on-off of the third driven gear and the first output shaft (21), and the second gear shifting transmission piece (32) is used for switching and controlling the transmission on-off of the fourth driven gear (61) or the fifth driving gear (71) and the intermediate shaft (80).

7. A double motor coupling transmission according to claim 3, characterized in that the first gear change transmission (31) is provided on the first input shaft (12).

8. The dual motor coupled transmission of claim 7, wherein the transmission gear sets include a first gear set (40), a second gear set (50), and a third gear set (60), the first gear set (40) is in driving connection with each of the first input shaft (12) and the intermediate shaft (80), the second gear set (50) is in driving connection with each of the first input shaft (12), the intermediate shaft (80), and the second output shaft (23), and the third gear set (60) is in driving connection with each of the intermediate shaft (80), the second input shaft (14), and the second output shaft (23).

9. The dual motor coupling transmission according to claim 8, wherein the first gear set (40) includes a first driving gear (41) and a first driven gear (42) which are sequentially meshed, the second gear set (50) includes a second driving gear (51), a second driven gear (52) and a third driven gear (53), and the third gear set (60) includes a fourth driven gear (61), a fourth driving gear (62) and a driven gear (63);

the first driving gear (41) and the second driving gear (51) are sequentially connected to the first input shaft (12) along a power transmission direction, the first driven gear (42), the second driven gear (52) and the fourth driven gear (61) are sequentially connected to the intermediate shaft (80) along the power transmission direction, the third driven gear (53) is connected to the first output shaft (21), the fourth driving gear (62) is connected to the second input shaft (14), the driven gear (63) is connected to the second output shaft (23), the first gear shifting transmission piece (31) is used for switching and controlling transmission on-off of the first driving gear (41) or the second driving gear (51) and the first input shaft (12), and the second gear shifting transmission piece (32) is used for switching and controlling transmission on-off of the fourth driven gear (61) and the intermediate shaft (80).

10. A dual motor coupling transmission according to claim 3, wherein the first shift transmission member (31) and the second shift transmission member (32) are each one of a shift synchronizer, a sliding sleeve shift member or a tooth sleeve shift member.

11. An agricultural machine comprising a double motor coupled transmission as claimed in any one of claims 1 to 10.