Dual motor drive system and agricultural machine

Abstract

The utility model discloses a double motor transmission system and agricultural machinery, including axle drive shaft, first motor shaft, second motor shaft, operation transmission shaft and intermediate adapter axle, first motor shaft is equipped with first engagement device, operation transmission shaft is connected with operation device and is connected with first motor shaft through first clutch device, and the intermediate adapter axle is equipped with the first gear set of meshing transmission between one of first motor shaft and second motor shaft, and is equipped with planetary gear mechanism between another, sun wheel is located on the intermediate adapter axle, and the planetary carrier is on the intermediate adapter axle and is equipped with the third gear set of meshing transmission between operation transmission shaft, and the gear ring is used for transmitting the power of corresponding motor shaft to the planetary carrier, and is equipped with gear ring brake correspondingly, and first engagement device is used for engaging or disconnecting the gear ring of first gear set or planetary gear mechanism corresponding to first motor shaft, so that the working condition of stable operation output rotating speed and big traction walking can be satisfied simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, and in particular relates to a dual-motor transmission system and agricultural machinery. Background Technology

[0002] Traditional tractors mostly use diesel engines, which suffer from problems such as high noise, heavy pollution, inconvenient operation due to multiple gears, low efficiency, and high fuel waste and costs. Therefore, energy-saving and environmentally friendly new energy tractors have become a development trend.

[0003] Currently, due to the driving requirements for both driving and operation, new energy tractors are generally equipped with a dual-motor parallel shaft multi-speed structure, but this cannot simultaneously meet the working conditions of stable operating output speed and high traction driving. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies, this utility model provides a dual-motor transmission system and agricultural machinery, which aims to solve the technical problem that the existing parallel shaft scheme cannot simultaneously meet the working conditions of stable operating output speed and high traction travel.

[0005] To achieve the above objectives, the first aspect of this utility model provides a dual-motor transmission system, wherein the dual-motor transmission system includes an axle drive shaft, a first motor shaft, a second motor shaft, a working transmission shaft, and an intermediate transfer shaft; the axle drive shaft is connected to an axle device; the first motor shaft is connected to a first motor and is provided with a first engagement device; the second motor shaft is connected to a second motor; the working transmission shaft is connected to a working device and is connected to the first motor shaft through a first clutch device; the intermediate transfer shaft is provided with a first gear set for meshing transmission between itself and one of the first motor shaft and the second motor shaft, and with the other of the two motor shafts, a planetary gear mechanism is provided, the sun gear of the planetary gear mechanism is disposed on the intermediate transfer shaft, the planet carrier of the planetary gear mechanism is loosely fitted on the intermediate transfer shaft and is provided with a third gear set for meshing transmission between itself and the axle drive shaft, the ring gear of the planetary gear mechanism is used to transmit power from the corresponding motor shaft to the planet carrier, and the ring gear is provided with a corresponding ring gear brake; the first engagement device is used to engage or disengage the first gear set or the ring gear of the planetary gear mechanism disposed corresponding to the first motor shaft.

[0006] In one embodiment of this utility model, a planetary gear mechanism is provided between the intermediate adapter shaft and the first motor shaft, a first gear set is provided between the intermediate adapter shaft and the second motor shaft, a fourth driving gear is loosely fitted on the first motor shaft, the outer teeth of the gear ring of the planetary gear mechanism are connected to the fourth driving gear, and a first engagement device is used to engage or disengage the fourth driving gear.

[0007] In one embodiment of this utility model, a second gear set for meshing transmission is further provided between the intermediate adapter shaft and the second motor shaft. The speed ratio of the second gear set is less than that of the first gear set. One of the intermediate adapter shaft and the second motor shaft is provided with a second engagement device. The second engagement device is located between the first gear set and the second gear set and is used to select one of the first gear set and the second gear set to engage with the corresponding shaft or to disconnect both from the corresponding shaft.

[0008] In one embodiment of this utility model, the first gear set includes a first driving gear disposed on the second motor shaft and a first driven gear loosely fitted on the intermediate adapter shaft and meshing with the first driving gear for transmission. The second gear set includes a second driving gear disposed on the second motor shaft and a second driven gear loosely fitted on the intermediate adapter shaft and meshing with the second driving gear for transmission. A second engagement device is disposed on the intermediate adapter shaft and located between the first driven gear and the second driven gear. The second engagement device is used to select one of the first driven gear and the second driven gear to engage with the intermediate adapter shaft or to disconnect both from the intermediate adapter shaft.

[0009] In one embodiment of this utility model, the second motor shaft is loosely fitted onto the first motor shaft.

[0010] In one embodiment of this utility model, the first motor shaft and the second motor shaft are located at a first height, the intermediate adapter shaft is located at a second height lower than the first height, the axle drive shaft is located at a third height lower than the second height, and the first motor shaft and the axle drive shaft are centrally located on the frame of the agricultural machinery.

[0011] In one embodiment of this utility model, a fifth driving gear is also provided on the first motor shaft. The fifth driving gear is used to mesh and transmit power with the fifth driven gear on the working oil pump of the agricultural machinery.

[0012] In one embodiment of the present invention, the third gear set includes a third driving gear disposed on a planetary carrier and a third driven gear disposed on the axle drive shaft and meshing with the third driving gear.

[0013] In one embodiment of the present invention, the axle drive shaft includes a front axle section and a rear axle section connected by a second clutch device, a third driven gear is disposed on the rear axle section, the second clutch device is configured as a four-wheel drive clutch, and can switch between engaging only the rear axle section and engaging both axle sections.

[0014] To achieve the above objectives, a second aspect of this utility model provides an agricultural machine, wherein the agricultural machine includes the dual-motor transmission system described above.

[0015] Through the above technical solution, the dual-motor drive system provided by this utility model has the following beneficial effects: When using the aforementioned dual-motor transmission system, it includes an axle drive shaft, a first motor shaft, a second motor shaft, a working transmission shaft, and an intermediate transfer shaft. The first motor shaft is equipped with a first engagement device. The working transmission shaft is connected to the first motor shaft via a first clutch device. The intermediate transfer shaft has a first gear set engaged with one of the first and second motor shafts, and a planetary gear mechanism with the other. The sun gear of the planetary gear mechanism is mounted on the intermediate transfer shaft. A third gear set engaged with the axle drive shaft is mounted on the intermediate transfer shaft. The ring gear is used to transmit power from the corresponding motor shaft to the planetary carrier. A gear ring brake is provided accordingly. The first engagement device is used to engage or disengage the gear ring of the first gear set or planetary gear mechanism corresponding to the first motor shaft. By controlling the first engagement device and the first clutch device, the power of the first motor can be selectively transmitted to at least one of the working device and the axle device, thereby realizing the switching of the power path of the first motor. Through the setting of the intermediate transfer shaft, the planetary gear mechanism and the first gear set, the first motor and the second motor can also be coupled to drive the axle device through the planetary gear mechanism, so that the above-mentioned parallel shaft scheme can simultaneously meet the requirements of stable working output speed and high traction travel.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the structure of a dual-motor drive system according to an embodiment of the present invention; Figure 2 This is based on the spatial arrangement diagram of each axis in this utility model; Figure 3 This is a schematic diagram of a planetary gear mechanism according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 100. Axle drive shaft; 101. Front axle assembly; 102. Rear axle assembly; 110. Front axle section; 120. Rear axle section; 130. Second clutch device; 140. Third gear set; 141. Third drive gear; 142. Third driven gear; 200. First motor shaft; 201. First motor; 210. Fourth drive gear; 220. First engagement device; 230. Fifth drive gear; 300. Second motor shaft; 301. Second motor; 310. First gear set; 311. First drive gear 312. First driven gear; 320. Second gear set; 321. Second driving gear; 322. Second driven gear; 400. Working transmission shaft; 401. Working device; 410. First clutch device; 500. Intermediate transfer shaft; 510. Second engagement device; 600. Planetary gear mechanism; 601. Sun gear; 602. Planet gears; 603. Planet carrier; 604. Ring gear; 605. External gear; 606. Internal gear; 607. Ring gear brake; 700. Working oil pump; 701. Fifth driven gear. Detailed Implementation

[0019] The specific embodiments of this 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 illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] The dual-motor drive system and agricultural machinery of this utility model are described below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, this utility model provides a dual-motor drive system, wherein the dual-motor drive system includes: The axle drive shaft 100 is connected to the axle assembly; The first motor shaft 200 is connected to the first motor 201 and is provided with a first engagement device 220; The second motor shaft 300 is connected to the second motor 301; The working drive shaft 400 is connected to the working device 401 and connected to the first motor shaft 200 through the first clutch device 410; The intermediate transfer shaft 500 is provided with a first gear set 310 that meshes with one of the first motor shaft 200 and the second motor shaft 300, and a planetary gear mechanism 600 that meshes with the other. The sun gear 601 of the planetary gear mechanism 600 is mounted on the intermediate transfer shaft 500. The planet carrier 603 of the planetary gear mechanism 600 is loosely fitted on the intermediate transfer shaft 500 and is provided with a third gear set 140 that meshes with the axle drive shaft 100. The ring gear 604 of the planetary gear mechanism 600 is used to transmit the power of the corresponding motor shaft to the planet carrier 603, and the ring gear 604 is provided with a ring gear brake 607. The first engagement device 220 is used to engage or disengage the gear ring 604 of the first gear set 310 or planetary gear mechanism 600 that is corresponding to the first motor shaft 200.

[0022] When using the aforementioned dual-motor transmission system, it includes an axle drive shaft 100, a first motor shaft 200, a second motor shaft 300, a working transmission shaft 400, and an intermediate transfer shaft 500. The first motor shaft 200 is equipped with a first engagement device 220. The working transmission shaft 400 is connected to the first motor shaft 200 via a first clutch device 410. The intermediate transfer shaft 500 has a first gear set 310 that meshes with one of the first motor shaft 200 and the second motor shaft 300, and a planetary gear mechanism 600 that meshes with the other. The sun gear 601 of the planetary gear mechanism 600 is mounted on the intermediate transfer shaft 500. The planet carrier 603 is loosely fitted on the intermediate transfer shaft 500 and has a third gear set 140 that meshes with the axle drive shaft 100. The gear ring 604 is used to transmit power to the corresponding motor. The power of the shaft is transmitted to the planetary carrier 603, and a corresponding gear ring brake 607 is provided. The first engagement device 220 is used to engage or disengage the gear ring 604 of the first gear set 310 or the planetary gear mechanism 600, which is provided corresponding to the first motor shaft 200. By controlling the first engagement device 220 and the first clutch device 410, the power of the first motor 201 can be selectively transmitted to at least one of the working device 401 and the axle device, thereby realizing the switching of the power path of the first motor 201. Through the setting of the intermediate adapter shaft 500, the planetary gear mechanism 600 and the first gear set 310, the first motor 201 and the second motor 301 can also be coupled to drive the axle device through the planetary gear mechanism 600, so that the above parallel shaft scheme can simultaneously meet the working conditions of stable operating output speed and high traction travel.

[0023] Specifically, the aforementioned dual-motor transmission system can have a second motor independent travel mode, a dual-motor coupled travel mode, a first operating mode, and a second operating mode. In the second motor independent travel mode, the first clutch device 410 switches to disconnect the operating drive shaft 400 and the first motor shaft 200, the first engagement device 220 switches to disconnect the power transmission between the first motor shaft 200 and the intermediate transfer shaft 500, and the gear ring brake 607 switches to lock the gear ring 604, so that the axle drive shaft 100 can be driven independently by the second motor 301. In the dual-motor coupled travel mode, the first clutch device 410 switches to disconnect the connection between the operating drive shaft 400 and the first motor shaft 200, the first engagement device 220 switches to establish the power transmission between the first motor shaft 200 and the intermediate transfer shaft 500, and the gear ring brake 607 switches to unlock the gear ring 604, so that the power of the first motor 201 and the second motor 301 is coupled on the planetary carrier 603 of the planetary gear mechanism 600, and coupled to drive the axle drive shaft 100. In the first operating mode, the first clutch device 410 and the first engagement device 220 are engaged, and the gear ring brake 607 switches to unlock the gear ring 604. This allows the first motor 201 to directly drive the PTO (operating device 401) at a stable speed while the dual motors can couple and drive the axle drive shaft 100 to rotate, enabling the axle device to move. This provides high traction while meeting the PTO speed requirements, and the traveling speed and PTO speed are decoupled. In the second operating mode, the first clutch device 410 engages the operating drive shaft 400 and the first motor shaft 200, the first engagement device 220 disconnects the power transmission between the first motor shaft 200 and the intermediate adapter shaft 500, and the gear ring brake 607 locks the gear ring 604. This allows the first motor 201 to independently drive the operating drive shaft 400, and the second motor 301 to independently drive the axle drive shaft 100, enabling simultaneous movement and operation.

[0024] It should be noted that the axle drive shaft 100, the first motor shaft 200, the second motor shaft 300, the working transmission shaft 400, and the intermediate adapter shaft 500 can all be arranged to extend along the front-rear direction of the vehicle frame, and the relative positional relationship between each shaft can be set to meet the power transmission requirements. The axle drive shaft 100 can be connected to one or both of the front axle assembly 101 and the rear axle assembly 102. The output power of the first motor 201 and the second motor 301 can be the same or different. The working transmission shaft 400 is a PTO (Power Take-Off) shaft, and the working device 401 connected to the working transmission shaft 400 includes, but is not limited to, one of a rotary tillage device 401, a seeding device 401, a ditching device 401, and a baling device 401. It should be noted that the axle drive shaft 100, the first motor shaft 200, the second motor shaft 300, the working transmission shaft 400, and the intermediate adapter shaft 500 can all be rotatably mounted on the vehicle frame. In addition, the first clutch device 410 includes, but is not limited to, a clutch, and the first engagement device 220 includes, but is not limited to, one of a shift sleeve, a synchronizer, a sliding sleeve, or a sliding gear.

[0025] See Figure 1 and Figure 3In one embodiment of this utility model, a planetary gear mechanism 600 is provided between the intermediate adapter shaft 500 and the first motor shaft 200, and a first gear set 310 is provided between the intermediate adapter shaft 500 and the second motor shaft 300. A fourth driving gear 210 is loosely fitted on the first motor shaft 200. The outer teeth 605 of the gear ring 604 of the planetary gear mechanism 600 are connected to the fourth driving gear 210. Specifically, the inner and outer sides of the gear ring 604 are provided with inner teeth 606 and outer teeth 605 respectively. The inner teeth 606 mesh with the planet gear 602, and the outer teeth 605 mesh with the fourth driving gear 210. The first engagement device 220 is used to engage or disengage the fourth driving gear 210. The planetary gear mechanism 600 can be used as the power transmission mechanism between the first motor shaft 200 and the intermediate transfer shaft 500. By adding a fourth driving gear 210 to the first motor shaft 200, which connects to the external teeth 605 of the gear ring 604 of the planetary gear mechanism 600, the engagement or disengagement of the first engagement device 220 and the planetary gear mechanism 600 can be achieved. The first gear set 310 can be used as the power transmission mechanism between the second motor shaft 300 and the intermediate transfer shaft 500. This facilitates the subsequent arrangement of other gear sets on the second motor shaft 300, allowing the second motor 301 to operate in high and low speed gears when driven. Furthermore, it allows the second motor shaft 300 to be installed loosely within the first motor shaft 200. Compared to the second motor shaft 300, the first motor shaft 200 has a stronger load-bearing capacity. Since the first motor shaft 200 is a longer shaft and the second motor shaft 300 is a shorter shaft, the space between the first motor shaft 200 and the intermediate transfer shaft 500 is larger, thus facilitating the arrangement of more complex planetary gear mechanisms 600.

[0026] Of course, this utility model is not limited to this. It is also possible to provide a first gear set 310 between the intermediate adapter shaft 500 and the first motor shaft 200, and a planetary gear mechanism 600 between the intermediate adapter shaft 500 and the second motor shaft 300. Then, the first engagement device 220 is used to engage or disengage the first drive gear 311 in the first gear set 310 that is hollowly fitted on the first motor shaft 200. The fourth drive gear 210 is provided on the second motor shaft 300 and connected to the outer ring 605 of the gear ring 604 of the planetary gear mechanism 600. The fourth drive gear 210 is directly connected to the second motor shaft 300, or it is hollowly fitted on the second motor shaft 300. If it is hollowly fitted on the second motor shaft 300, then an engagement device needs to be added to the second motor shaft 300 to engage or disengage the fourth drive gear 210.

[0027] In one embodiment of this utility model, a second gear set 320 for meshing transmission is further provided between the intermediate adapter shaft 500 and the second motor shaft 300. The speed ratio of the second gear set 320 is less than that of the first gear set 310. One of the intermediate adapter shaft 500 and the second motor shaft 300 is provided with a second engagement device 510. The second engagement device 510 is located between the first gear set 310 and the second gear set 320 and is used to select one of the first gear set 310 and the second gear set 320 to engage with the corresponding shaft or to disconnect both from the corresponding shaft. By adding the second gear set 320 and the second engagement device 510, the working modes of the transmission system are expanded to meet more needs. When the second engagement device 510 selects the first gear set 310 to engage with the corresponding shaft, the transmission system can be in a low-speed driving gear. When the second engagement device 510 selects the second gear set 320 to engage with the corresponding shaft, the transmission system can be in a high-speed driving gear. When the second motor 301 fails, the second engagement device 510 selects both gear sets to disconnect from the corresponding shaft, and controls the first clutch device 410 to disconnect the working transmission shaft 400 and the first motor shaft 200. The first engagement device 220 then engages the power transmission between the first motor shaft 200 and the intermediate transfer shaft 500, so that the first motor 201 can independently drive the axle drive shaft 100 and enter the first motor independent driving mode. Of course, this mode can also be used if the second motor 301 does not fail. Specifically, the second engagement device 510 includes, but is not limited to, one of a shift sleeve, synchronizer, sliding sleeve, or sliding gear.

[0028] In one embodiment of this utility model, the first gear set 310 includes a first driving gear 311 mounted on the second motor shaft 300 and a first driven gear 312 loosely fitted on the intermediate adapter shaft 500 and meshing with the first driving gear 311. The second gear set 320 includes a second driving gear 321 mounted on the second motor shaft 300 and a second driven gear 322 loosely fitted on the intermediate adapter shaft 500 and meshing with the second driving gear 321. A second engagement device 510 is mounted on the intermediate adapter shaft 500 and located between the first driven gear 312 and the second driven gear 322. The second engagement device 510 is used to select one of the first driven gear 312 and the second driven gear 322 to engage with the intermediate adapter shaft 500 or to disconnect both from the intermediate adapter shaft 500. Mounting the second engagement device 510 on the intermediate adapter shaft 500 reduces the load on the second motor shaft 300. Of course, this utility model is not limited to this. The second coupling device 510 is provided on the second motor shaft 300, and the first driving gear 311 and the second driving gear 321 are loosely fitted on the second motor shaft 300. The first driven gear 312 and the second driven gear 322 are connected to the intermediate transfer shaft 500.

[0029] In one embodiment of this utility model, the second motor shaft 300 is loosely fitted onto the first motor shaft 200. This allows the two motor shafts to be arranged coaxially, reducing the space occupied by the transmission system and meeting the requirements of a compact and simple structure. Of course, this utility model is not limited to this; the first motor shaft 200 and the second motor shaft 300 can be located on opposite sides of the intermediate adapter shaft 500, or on adjacent sides. Specifically, the first motor 201 and the second motor 301 are both located on the side of their respective motor shafts away from the working transmission shaft 400.

[0030] See Figure 1 and Figure 2 In one embodiment of this utility model, the first motor shaft 200 and the second motor shaft 300 are located at a first height, the intermediate adapter shaft 500 is located at a second height lower than the first height, and the axle drive shaft 100 is located at a third height lower than the second height. The first motor shaft 200 and the axle drive shaft 100 are centrally located on the frame of the agricultural machinery. That is, the two coaxially arranged motor shafts, the intermediate adapter shaft 500, and the axle drive shaft 100 are arranged sequentially from top to bottom. Alternatively, the intermediate adapter shaft 500 can be offset to one side of the frame, which can lower the overall height of the transmission system and improve the passability of the agricultural machinery.

[0031] Please see again Figure 1 In one embodiment of this utility model, a fifth driving gear 230 is further provided on the first motor shaft 200. The fifth driving gear 230 is used to mesh and transmit power with the fifth driven gear 701 on the working oil pump 700 of agricultural machinery. By adding the fifth driving gear 230, the working modes of the transmission system are further expanded to meet more needs. Understandably, in the independent walking mode of the second motor, the first clutch device 410 switches to disconnect the working transmission shaft 400 and the first motor shaft 200, and the first engagement device 220 switches to disconnect the power transmission between the first motor shaft 200 and the intermediate transfer shaft 500. At this time, the first motor 201 can be started and drives the fifth driven gear 701 through the fifth driving gear 230 to drive the working oil pump 700. The working oil pump 700 can be used to drive devices that require speed and steering. Of course, if the first motor 201 is not started, the working oil pump 700 will not be driven to work.

[0032] Furthermore, the fifth drive gear 230 can also be configured to be loosely fitted on the first motor shaft 200, while the first engagement device 220 is located between the fourth drive gear 210 and the fifth drive gear 230, and is used to select one of the fourth drive gear 210 and the fifth drive gear 230 to engage with the first motor shaft 200 or both to disconnect from the first motor shaft 200.

[0033] Furthermore, in one embodiment of this utility model, the dual-motor drive system also includes an electronic oil pump, which enables active lubrication and is mounted on the gearbox housing.

[0034] In one embodiment of the present invention, the dual-motor drive system further includes a parking brake mounted on any shaft.

[0035] In one embodiment of this utility model, the third gear set 140 includes a third driving gear 141 disposed on the planetary carrier 603 and a third driven gear 142 disposed on the axle drive shaft 100 and meshing with the third driving gear 141. Specifically, the diameter of the third driven gear 142 is larger than the diameter of the third driving gear 141, thereby increasing the torque.

[0036] In one embodiment of this utility model, the axle drive shaft 100 includes a front axle section 110 and a rear axle section 120 connected by a second clutch device 130. A third driven gear 142 is disposed on the rear axle section 120. The second clutch device 130 is a four-wheel drive clutch and can switch between engaging only with the rear axle section 120 and engaging with both axle sections. That is, by adding the second clutch device 130, the transmission system can switch between rear-wheel two-wheel drive and four-wheel drive.

[0037] In one embodiment of the present invention, the dual-motor drive system further includes a mode selection module, which can issue mode commands corresponding to different needs to control the first motor 201, the second motor 301, the first engagement device 220, the first clutch device 410, the second engagement device 510 and the second clutch device 130 respectively.

[0038] Understandably, the dual-motor drive system can issue relevant mode commands through a mode selection module. The dual-motor drive system provided by this utility model can have eight modes: (1) Mode 1: When receiving the dual-motor coupled driving mode command, the first clutch device 410 is disengaged, the second clutch device 130 is engaged (either two-wheel drive or four-wheel drive is possible), the gear ring brake 607 is unlocked and disengaged, the first engagement device 220 is engaged, the second engagement device 510 can be engaged by selecting one of the first driven gear 312 and the second driven gear 322, and the first motor 201 and the second motor 301 are controlled to drive the corresponding motor shafts to rotate, so that the power of the dual motors can be coupled on the planet carrier 603 of the planetary gear mechanism 600, and drive the axle drive shaft 100 to rotate through the third gear set 140 to improve traction. Power transmission path one is as follows: First motor 201 - First motor shaft 200 - First engagement device 220 - Fourth drive gear 210 - Gear ring 604 - Planetary gear 602 - Planetary carrier 603 - Third gear set 140 - Axle drive shaft 100; Power transmission path two is as follows: Second motor 301 - Second motor shaft 300 - First gear set 310 / Second gear set 320 - Second engagement device 510 - Intermediate adapter shaft 500 - Sun gear 601 - Planetary gear 602 - Planetary carrier 603 - Third gear set 140 - Axle drive shaft 100. This mode enables agricultural machinery to perform tasks such as getting out of trouble, heavy-load traction, and plowing operations in complex terrain.

[0039] (2) Mode 2: Upon receiving the instruction of the first working mode, the first clutch device 410 is engaged, the second clutch device 130 is engaged (either two-wheel drive or four-wheel drive is possible), the gear ring brake 607 is unlocked and disengaged, the first engagement device 220 is engaged, the second engagement device 510 can select one of the first driven gear 312 and the second driven gear 322 to engage, and the first motor 201 and the second motor 301 are controlled to drive the corresponding motor shafts to rotate, so that the first motor 201 drives the PTO (working device 401) to work at a stable speed, while the two motors can couple and drive the axle drive shaft 100 to rotate, so that the axle device can travel, providing a large traction force while meeting the PTO speed, and the travel speed and PTO speed are decoupled.

[0040] (3) Mode 3: Upon receiving the instruction of the second working mode, the first clutch device 410 is engaged, the second clutch device 130 is engaged (either two-wheel drive or four-wheel drive is acceptable), the gear ring brake 607 is locked and braked, the first engagement device 220 is disengaged, the second engagement device 510 is selected to engage with the first driven gear 312 or the second driven gear 322, and the first motor 201 and the second motor 301 are controlled to drive the corresponding motor shafts to rotate, so that the first motor 201 drives the working transmission shaft 400 to rotate, which is responsible for the power output of the working device 401, and the second motor 301 drives the axle drive shaft 100 to rotate, which is responsible for the power output of the axle device. The walking and working are independently controlled. The first power transmission path is: first motor 201 - first motor shaft 200 - first clutch device 410 - working drive shaft 400; the second power transmission path is: second motor 301 - second motor shaft 300 - first gear set 310 - second engagement device 510 - intermediate transfer shaft 500 - sun gear 601 - planetary gear 602 - planetary carrier 603 - third gear set 140 - axle drive shaft 100. This mode can meet the needs of agricultural machinery for complex operations such as rotary tillage, sowing, ditching, and baling.

[0041] (4) Mode 4: Upon receiving the command for the low-speed independent travel mode of the second motor, the first clutch device 410 is disengaged, the second clutch device 130 is engaged (either two-wheel drive or four-wheel drive is acceptable), the gear ring brake 607 is locked, the first engagement device 220 is disengaged, the second engagement device 510 is selected to engage with the first driven gear 312, and the second motor 301 is controlled to drive the second motor shaft 300 to rotate, thereby driving the axle drive shaft 100 to rotate. The power transmission path is: second motor 301 - second motor shaft 300 - first gear set 310 - second engagement device 510 - intermediate adapter shaft 500 - sun gear 601 - planetary gear 602 - planetary carrier 603 - third gear set 140 - axle drive shaft 100. In this mode, agricultural machinery can be used for low-speed travel and traction under medium traction requirements.

[0042] (5) Mode 5: Upon receiving the command for the high-speed independent travel mode of the second motor, the first clutch device 410 is disengaged, the second clutch device 130 is engaged (either two-wheel drive or four-wheel drive is possible), the gear ring brake 607 is locked, the first engagement device 220 is disengaged, the second engagement device 510 is selected to engage with the second driven gear 322, and the second motor 301 is controlled to drive the second motor shaft 300 to rotate, thereby driving the axle drive shaft 100 to rotate. The power transmission path is: second motor 301 - second motor shaft 300 - second gear set 320 - second engagement device 510 - intermediate transfer shaft 500 - sun gear 601 - planet gear 602 - planet carrier 603 - third gear set 140 - axle drive shaft 100. This mode can realize high-speed travel and transportation of agricultural machinery.

[0043] (6) Mode 6: When a reverse gear command is received, the power transmission path can be the same as one of Mode 1, Mode 3 to Mode 6 (i.e., non-operation mode), only the steering is reversed, so as to realize the reverse driving of agricultural machinery. Reverse operation mode: The first motor can also be reversed and the second motor can be forward to realize the reverse operation mode.

[0044] Therefore, the dual-motor drive system provided by this utility model has the following advantages: 1. It adopts a single planetary gear mechanism with a small speed ratio and small size, and uses two motors coaxially distributed, which makes the structure compact, relatively simple and highly reliable.

[0045] 2. The switching between single-motor and dual-motor operation can be achieved through the gear shifting device to meet the operation requirements of different working conditions. It has the advantages of high motor utilization, multiple gears, high transmission efficiency, and low energy consumption.

[0046] 3. The motor can directly drive the working transmission shaft, and the output PTO stepless shifting is realized through mechanical structure.

[0047] 4. In the coupled gear position, it can also switch between low speed gear and high speed gear, realize uninterrupted gear shifting, improve traction, increase comfort and reduce the jerking caused by gear shifting.

[0048] 5. The coupling control of the first and second motors can reduce the power requirement of a single motor and greatly increase the traction horsepower.

[0049] 6. While the working motor directly drives the PTO at a stable speed, the dual motors can couple and drive the front and rear axles to travel, providing a large traction force while meeting the PTO working speed, and the travel speed and PTO speed are decoupled.

[0050] Furthermore, this utility model also provides an agricultural machine, which includes the dual-motor transmission system described above. Since the agricultural machine adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. Specifically, the agricultural machine may include, but is not limited to, a tractor.

[0051] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dual-motor drive system, characterized in that, include: Axle drive shaft (100) is connected to the axle assembly; The first motor shaft (200) is connected to the first motor (201) and is provided with a first engagement device (220); The second motor shaft (300) is connected to the second motor (301); The working drive shaft (400) is connected to the working device (401) and connected to the first motor shaft (200) through the first clutch device (410); An intermediate transition shaft (500) is provided with a first gear set (310) that meshes with one of the first motor shaft (200) and the second motor shaft (300), and with the other of the two motor shafts. The sun gear (601) of the planetary gear mechanism (600) is mounted on the intermediate transition shaft (500). The planet carrier (603) of the planetary gear mechanism (600) is loosely fitted on the intermediate transition shaft (500) and is provided with a third gear set (140) that meshes with the axle drive shaft (100). The ring gear (604) of the planetary gear mechanism (600) is used to transmit the power of the corresponding motor shaft to the planet carrier (603), and the ring gear (604) is provided with a ring gear brake (607). The first engagement device (220) is used to engage or disengage the gear ring (604) of the first gear set (310) or the planetary gear mechanism (600) that is correspondingly provided to the first motor shaft (200).

2. The dual-motor drive system according to claim 1, characterized in that, The intermediate adapter shaft (500) is provided with the planetary gear mechanism (600) between the intermediate adapter shaft (500) and the first motor shaft (200), and the first gear set (310) is provided between the intermediate adapter shaft (500) and the second motor shaft (300). A fourth driving gear (210) is loosely fitted on the first motor shaft (200). The external teeth (605) of the gear ring (604) of the planetary gear mechanism (600) are connected to the fourth driving gear (210). The first engagement device (220) is used to engage or disengage the fourth driving gear (210).

3. The dual-motor drive system according to claim 2, characterized in that, A second gear set (320) is also provided between the intermediate adapter shaft (500) and the second motor shaft (300) for meshing transmission. The speed ratio of the second gear set (320) is less than that of the first gear set (310). One of the intermediate adapter shaft (500) and the second motor shaft (300) is provided with a second engagement device (510). The second engagement device (510) is located between the first gear set (310) and the second gear set (320) and is used to select one of the first gear set (310) and the second gear set (320) to engage with the corresponding shaft or both to disconnect from the corresponding shaft.

4. The dual-motor drive system according to claim 3, characterized in that, The first gear set (310) includes a first driving gear (311) disposed on the second motor shaft (300) and a first driven gear (312) loosely fitted on the intermediate adapter shaft (500) and meshing with the first driving gear (311). The second gear set (320) includes a second driving gear (321) disposed on the second motor shaft (300) and a second driven gear (322) loosely fitted on the intermediate adapter shaft (500) and meshing with the second driving gear (321). The second engagement device (510) is disposed on the intermediate adapter shaft (500) and located between the first driven gear (312) and the second driven gear (322). The second engagement device (510) is used to select one of the first driven gear (312) and the second driven gear (322) to engage with the intermediate adapter shaft (500) or both to disconnect from the intermediate adapter shaft (500).

5. The dual-motor drive system according to claim 1, characterized in that, The second motor shaft (300) is loosely fitted onto the first motor shaft (200).

6. The dual-motor drive system according to claim 5, characterized in that, The first motor shaft (200) and the second motor shaft (300) are located at a first height, the intermediate adapter shaft (500) is located at a second height lower than the first height, the axle drive shaft (100) is located at a third height lower than the second height, and the first motor shaft (200) and the axle drive shaft (100) are centrally located on the frame of the agricultural machinery.

7. The dual-motor drive system according to any one of claims 1 to 6, characterized in that, The first motor shaft (200) is also provided with a fifth drive gear (230), which is used to mesh with the fifth driven gear (701) on the working oil pump (700) of the agricultural machinery for transmission.

8. The dual-motor drive system according to any one of claims 1 to 6, characterized in that, The third gear set (140) includes a third driving gear (141) disposed on the planetary carrier (603) and a third driven gear (142) disposed on the axle drive shaft (100) and meshing with the third driving gear (141).

9. The dual-motor drive system according to claim 8, characterized in that, The axle drive shaft (100) includes a front axle section (110) and a rear axle section (120) connected by a second clutch device (130). The third driven gear (142) is disposed on the rear axle section (120). The second clutch device (130) is configured as a four-wheel drive clutch and can switch between engaging only with the rear axle section (120) and engaging with both axle sections.

10. An agricultural machine, characterized in that, The agricultural machinery includes a dual-motor drive system according to any one of claims 1 to 9.

Images