Transmission system and electric tractor

Abstract

The utility model relates to electric tractor technical field discloses a transmission system and electric tractor. The transmission system includes walking motor and work motor, walking motor is arranged to transmit walking power to drive axle, work motor is arranged to transmit work power to operation device, and / or, provides walking power to drive axle. Walking motor can provide walking power for drive axle to drive whole car walking, work motor can provide work power for operation device to drive operation device to work, the setting of walking motor and work motor makes drive axle and operation device transmission route independent and do not interfere with each other, simple structure, low in cost, and transmission system arrangement space is smaller, so that the transmission system can match and adapt electric tractor's electric drive, work motor can also provide walking power for drive axle, guarantees whole car still can walk under the condition that walking motor breaks down, improves whole car operation stability.

Description

Technical Field

[0001] This utility model belongs to the field of electric tractor technology, specifically relating to a transmission system and an electric tractor. Background Technology

[0002] A tractor is a self-propelled power unit used to traction and drive work machinery to complete various mobile tasks, and can also be used for stationary work. Increasingly stringent emission regulations and advancements in overall battery technology have led to the gradual replacement of gasoline-powered tractors with electric tractors. Existing electric tractors are typically modified from gasoline-powered tractor models, using an electric motor for power instead of fuel.

[0003] However, the transmission system of fuel-powered tractors is complex and cannot be matched or adapted to the electric drive of electric tractors. Therefore, it is necessary to optimize the transmission system of electric tractors. Utility Model Content

[0004] The purpose of this invention is to provide a transmission system and an electric tractor to solve the technical problem that the transmission system of existing fuel tractors cannot be matched and adapted to the electric drive of electric tractors.

[0005] To achieve the above objectives, the present invention provides a transmission system, comprising: a walking motor configured to transmit walking power to a drive axle; and a working motor configured to transmit working power to a working device, and / or to provide walking power to the drive axle.

[0006] In some embodiments, the walking motor is configured to transmit walking power to the rear axle and / or the front axle.

[0007] In some embodiments, the transmission system further includes: a travel input shaft, which is drive-connected to the power output end of the travel motor; an idler shaft, which is arranged parallel to the travel input shaft and drive-connected to the travel input shaft via a first gear set; and a travel transmission mechanism, which is drive-connected between the idler shaft and the drive axle to allow the travel motor to transmit travel power to the drive axle.

[0008] In some embodiments, the travel transmission mechanism includes: a front axle output shaft, which is arranged parallel to the idler shaft and fitted with a front axle output shaft gear that meshes with an idler shaft drive gear located on the idler shaft; a first engagement sleeve, which is fitted on the front axle output shaft and is slidable along the axial direction of the front axle output shaft to selectively drive the front axle output shaft to the front axle output shaft gear; and a front drive shaft, which is driveably connected between the front axle output shaft and the front axle to allow the front axle output shaft to transmit travel power to the front axle via the front drive shaft.

[0009] In some embodiments, the travel transmission mechanism includes: a rear axle output shaft, which is arranged parallel to the idler shaft and has a rear axle output shaft gear meshing with an idler shaft drive gear on the idler shaft; a rear drive shaft, which is driveably connected to the rear axle output shaft; and a drive bevel gear shaft, which is driveably connected between the rear drive shaft and the rear axle, so as to allow the rear axle output shaft to transmit travel power to the rear axle through the rear drive shaft and the drive bevel gear shaft.

[0010] In some embodiments, the transmission system further includes: a power input shaft, which is driveably connected to the power output end of the working motor; and a working transmission mechanism, which is driveably connected between the power input shaft and the working device to allow the working motor to transmit the working power to the working device.

[0011] In some embodiments, the transmission system includes: a travel drive driven gear sleeved on a drive bevel gear shaft that is drive-connected to the drive axle and meshes with a travel drive drive gear disposed on the power input shaft; and a second engagement sleeve sleeved on the drive bevel gear shaft and slidable along the axial direction of the drive bevel gear shaft to selectively drive the drive bevel gear shaft to the travel drive driven gear, thereby allowing the working motor to selectively transmit the working power to the drive axle.

[0012] In some embodiments, the working transmission mechanism includes a hydraulic output shaft arranged parallel to the power input shaft and driven to the power input shaft via a second gear set, the hydraulic output shaft being driven to the input end of a hydraulic pump.

[0013] In some embodiments, the working transmission mechanism includes a clutch input shaft driven to the power input shaft, a clutch output shaft connected to the clutch input shaft via a clutch, and a power output shaft driven to the clutch output shaft, the power output shaft being connected to the tool of the working device.

[0014] In another aspect, this utility model provides an electric tractor, which includes the transmission system described in any of the above embodiments.

[0015] Through the above technical solution, the travel motor can provide travel power to the drive axle to drive the entire vehicle, achieving stepless speed change across the entire section and meeting the speed requirements of the tillage and transportation sections; the work motor can provide working power to the working device to drive the working device connected to the vehicle to perform operations, ensuring the operation of the working device; the setting of the travel motor and the work motor makes the transmission routes of the drive axle and the working device independent and non-interfering, with a simple structure, low cost, and small space for transmission system layout, enabling the transmission system to match and adapt to the electric drive of the electric tractor; the work motor can also provide travel power to the drive axle, assisting the drive axle in traveling, and ensuring that the entire vehicle can still travel in the event of a failure of the travel motor, improving the overall vehicle operation stability.

[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:

[0018] Figure 1 A schematic diagram of the transmission system provided for an embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures

[0020] 1. Travel motor; 2. Work motor; 3. Front axle; 4. Travel input shaft; 5. Idler shaft; 6. Front axle output shaft; 7. Idler shaft drive gear; 8. Front axle output shaft gear; 9. First meshing sleeve; 10. Front drive shaft; 11. Rear axle output shaft; 12. Rear drive shaft; 13. Drive bevel gear shaft; 14. Power input shaft; 15. Travel drive drive gear; 16. Travel drive driven gear; 17. Second meshing sleeve; 18. Hydraulic output shaft; 19. Hydraulic pump; 20. Clutch input shaft; 21. Clutch; 22. Clutch output shaft; 23. Power output shaft; 24. Travel input shaft drive gear; 25. Idler shaft driven gear; 26. Rear axle differential assembly; 27. Rear axle. Detailed Implementation

[0021] 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.

[0022] See Figure 1 This utility model provides a transmission system, including a travel motor 1 and a working motor 2. The travel motor 1 is configured to transmit travel power to the drive axle, and the working motor 2 is configured to transmit working power to the working device and / or provide travel power to the drive axle. The travel motor 1 can provide travel power to the drive axle to drive the entire vehicle, achieving stepless speed regulation across the entire section and meeting the speed requirements of the tillage and transportation sections. The working motor 2 can provide working power to the working device to drive the working device connected to the vehicle to perform operations, ensuring the operation of the working device. The arrangement of the travel motor 1 and the working motor 2 makes the transmission routes of the drive axle and the working device independent and non-interfering, with a simple structure, low cost, and small space for transmission system layout, enabling the transmission system to match and adapt to the electric drive of electric tractors. The working motor 2 can also provide travel power to the drive axle, assisting the drive axle in its movement, and ensuring that the entire vehicle can still move in the event of a failure of the travel motor 1, thus improving the overall vehicle operation stability.

[0023] The transmission system of this invention is particularly suitable for electric tractors with lower horsepower and smaller layout dimensions.

[0024] In some embodiments, the rotational speed of the walking motor 1 can be controlled by operating the electronic control button, thereby controlling the working speed of the entire vehicle.

[0025] To enable the switching between two-wheel drive and four-wheel drive for the vehicle, the drive motor 1 is configured to transmit driving power to the rear axle 27 and / or the front axle 3. When the drive motor 1 only transmits driving power to the rear axle 27, the drive motor 1 can achieve two-wheel drive for the vehicle through the rear wheels connected to the rear axle 27; when the drive motor 1 transmits driving power to both the rear axle 27 and the front axle 3, it can achieve four-wheel drive for the vehicle, thus enabling the vehicle to switch between two-wheel drive and four-wheel drive to meet the vehicle's driving requirements.

[0026] To drive the drive axle, the transmission system also includes a travel input shaft 4, an idler shaft 5, and a travel transmission mechanism. The travel input shaft 4 is connected to the power output end of the travel motor 1. The idler shaft 5 is arranged parallel to the travel input shaft 4 and is connected to the travel input shaft 4 via a first gear set. The travel transmission mechanism is connected between the idler shaft 5 and the drive axle, allowing the travel motor 1 to transmit travel power to the drive axle. The travel power of the travel motor 1 is transmitted to the drive axle through the travel input shaft 4, the first gear set, the idler shaft 5, and the travel transmission mechanism, all of which are connected to the power output end of the travel motor 1, thereby driving the drive axle and driving the entire vehicle.

[0027] In some embodiments, the walking motor 1 and the walking input shaft 4 are connected by a spline.

[0028] In some embodiments, the first gear set includes a travel input shaft drive gear 24 disposed on the travel input shaft 4 and an idler shaft driven gear 25 disposed on the idler shaft 5. The travel motor 1 drives the travel input shaft 4 and the travel input shaft drive gear 24 to rotate. Through the meshing of the travel input shaft drive gear 24 and the idler shaft driven gear 25, the idler shaft driven gear 25 and the idler shaft 5 are driven to rotate, thereby driving the wheels mounted on the drive axle to run through the travel transmission mechanism.

[0029] To enable the walking motor 1 to selectively transmit walking power to the front axle 3, the walking transmission mechanism includes a front axle output shaft 6, a first engagement sleeve 9, and a front drive shaft 10. The front axle output shaft 6 is arranged parallel to the idler shaft 5 and is fitted with a front axle output shaft gear 8. The front axle output shaft gear 8 meshes with the idler shaft drive gear 7 located on the idler shaft 5. The first engagement sleeve 9 is located on the front axle output shaft 6 and can slide along the axial direction of the front axle output shaft 6 to selectively drive the front axle output shaft 6 to the front axle output shaft gear 8. The front drive shaft 10 is driven between the front axle output shaft 6 and the front axle 3 to allow the front axle output shaft 6 to transmit walking power to the front axle 3 through the front drive shaft 10. Through the meshing of the idler shaft drive gear 7 and the front axle output shaft gear 8, the walking power of the idler shaft 5 can be transmitted to the front axle output shaft gear 8. By connecting the first meshing sleeve 9 to the front axle output shaft gear 8, the walking power of the front axle output shaft gear 8 is transmitted to the front axle output shaft 6, and then to the front axle 3, so that the walking motor 1 drives the front axle 3 to move. By sliding the first meshing sleeve 9 along the axial direction of the front axle output shaft 6, the first meshing sleeve 9 is connected or separated from the front axle output shaft gear 8, so that the walking motor 1 can selectively transmit the walking power to the front axle 3, driving the front wheels mounted on the front axle 3 to walk.

[0030] In some embodiments, the front axle output shaft 6 is arranged parallel to and driven by the front drive shaft 10.

[0031] In some embodiments, the front drive shaft 10 drives to the front axle 3 via a bevel gear shaft and a front axle differential assembly.

[0032] In some embodiments, the first engagement sleeve 9 is controlled to slide axially along the front axle output shaft 6 by an operating mechanism, so that the first engagement sleeve 9 is selectively connected to the gear seat of the front axle output shaft gear 8.

[0033] It is understandable that the transmission path of the travel motor 1 driving the front axle 3 is as follows: the power of the travel motor 1 is transmitted sequentially through the travel input shaft 4, the travel input shaft drive gear 24, the idler shaft driven gear 25, the idler shaft 5, the idler shaft drive gear 7, the front axle output shaft gear 8, the first meshing sleeve 9, the front axle output shaft 6, the front drive shaft 10 and the front axle 3 to the front wheel connected to the front axle 3.

[0034] To enable the travel motor 1 to transmit travel power to the rear axle 27, the travel transmission mechanism includes a rear axle output shaft 11, a rear drive shaft 12, and a drive bevel gear shaft 13. The rear axle output shaft 11 is arranged parallel to the idler shaft 5 and is equipped with a rear axle output shaft gear that meshes with the idler shaft drive gear 7 on the idler shaft 5. The rear drive shaft 12 is driven to the rear axle output shaft 11, and the drive bevel gear shaft 13 is driven between the rear drive shaft 12 and the rear axle 27, allowing the rear axle output shaft 11 to transmit travel power to the rear axle 27 through the rear drive shaft 12 and the drive bevel gear shaft 13. The travel power of the idler shaft 5 is transmitted to the rear axle output shaft 11 through the idler shaft drive gear 7 and the rear axle output shaft gear located on the rear axle output shaft 11. The rear axle output shaft 11 then transmits travel power to the rear axle 27 through the rear drive shaft 12 and the drive bevel gear shaft 13, thereby enabling the travel motor 1 to drive the rear axle 27.

[0035] In some embodiments, the rear axle output shaft 11 is arranged in parallel with and driven by the rear drive shaft 12, and the rear drive shaft 12 is arranged in parallel with and driven by the drive bevel gear shaft 13.

[0036] In some embodiments, the drive bevel gear disposed on the drive bevel gear shaft 13 meshes with the bevel gear disposed on the rear axle differential assembly 26, thereby transmitting the power of the drive bevel gear to the rear axle differential assembly 26. The rear axle differential assembly 26 is connected to the half-shaft of the rear axle 27 for transmission, thereby realizing the drive of the rear wheels mounted on the rear axle 27.

[0037] It is understandable that the transmission path of the travel motor 1 driving the rear axle 27 is as follows: the travel power of the travel motor 1 is transmitted sequentially through the travel input shaft 4, the travel input shaft drive gear 24, the idler shaft driven gear 25, the idler shaft 5, the idler shaft drive gear 7, the rear axle output shaft 11, the rear drive shaft 12, the drive bevel gear shaft 13, the rear axle differential assembly 26, and the rear axle 27 to the rear wheel connected to the rear axle 27.

[0038] To enable the working motor 2 to transmit working power to the working device, the transmission system also includes a power input shaft 14 and a working transmission mechanism. The power input shaft 14 is drivenly connected to the power output end of the working motor 2, and the working transmission mechanism is drivenly connected between the power input shaft 14 and the working device, allowing the working motor 2 to transmit working power to the working device. The power input shaft 14 is connected to the working motor 2 and the working device, thereby transmitting the working power of the working motor 2 to the working device, realizing the operation of the vehicle-mounted working device.

[0039] In some embodiments, the working motor 2 is connected to the power input shaft 14 via a spline.

[0040] In some embodiments, the transmission system includes a travel drive driven gear 16 and a second engagement sleeve 17. The travel drive driven gear 16 is sleeved on the drive bevel gear shaft 13 which is connected to the drive axle and meshes with the travel drive drive gear 15 which is located on the power input shaft 14. The second engagement sleeve 17 is located on the drive bevel gear shaft 13 and can slide along the axial direction of the drive bevel gear shaft 13 to selectively drive the drive bevel gear shaft 13 to the travel drive driven gear 16, so as to allow the working motor 2 to selectively transmit working power to the drive axle. The power transmission between the power input shaft 14 and the travel drive passive gear 16 is achieved by meshing the travel drive active gear 15 set on the power input shaft 14 and the travel drive passive gear 16 sleeved on the active bevel gear shaft 13. The power of the travel drive passive gear 16 can be transmitted to the active bevel gear shaft 13 through the connection of the second meshing sleeve 17 and the travel drive passive gear 16, thereby transmitting the working power to the drive axle. The working power transmission between the working motor 2 and the drive axle is cut off by the separation of the second meshing sleeve 17 and the travel drive passive gear 16.

[0041] It is understandable that the transmission path of the working motor 2 driving the rear axle 27 is as follows: the working power of the working motor 2 is transmitted sequentially through the power input shaft 14, the travel drive active gear 15, the travel drive passive gear 16, the second meshing sleeve 17, the active bevel gear shaft 13, the rear axle differential assembly 26 and the rear axle 27 to the rear wheel connected to the rear axle 27.

[0042] In some embodiments, the working transmission mechanism includes a hydraulic output shaft 18, which is arranged parallel to the power input shaft 14 and is drivenly connected to the power input shaft 14 via a second gear set. The hydraulic output shaft 18 is also drivenly connected to the input end of the hydraulic pump 19. The working power of the working motor 2 is transmitted to the hydraulic pump 19 through the power input shaft 14, the second gear set, and the hydraulic output shaft 18, thereby enabling the hydraulic pump 19 to operate and realize hydraulic power steering for the entire vehicle, as well as the lifting and lowering of the working device.

[0043] In some implementations, the rotational speed and output torque of the hydraulic output shaft 18 are controlled by a motor controller to control the rotational speed and torque output of the working motor 2.

[0044] It is understandable that the working path of the working motor 2 driving the hydraulic pump 19 is as follows: the working power of the working motor 2 is transmitted to the hydraulic pump 19 in sequence through the power input shaft 14, the second gear set and the hydraulic output shaft 18.

[0045] In some embodiments, the working transmission mechanism includes a clutch input shaft 20 driven to the power input shaft 14, a clutch output shaft 22 connected to the clutch input shaft 20 via a clutch 21, and a power output shaft 23 driven to the clutch output shaft 22. The power output shaft 23 is driven to the implement of the working device. The working power of the working motor 2 is transmitted to the implement through the power input shaft 14, the clutch input shaft 20, the clutch 21, the clutch output shaft 22, and the power output shaft 23, driving the implement to work; the clutch 21 can control the power output.

[0046] In some embodiments, the power input shaft 14 and the clutch input shaft 20 are connected by a third gear set.

[0047] In some embodiments, the clutch output shaft 22 and the power output shaft 23 are connected by a fourth gear set.

[0048] It is understandable that the working path of the working motor 2 driving the tool is as follows: the working power of the working motor 2 is transmitted to the tool in sequence through the power input shaft 14, the third gear set, the clutch input shaft 20, the clutch 21, the clutch output shaft 22, the fourth gear set and the power output shaft 23.

[0049] In another aspect, this utility model provides an electric tractor, which includes the aforementioned transmission system. This transmission system is mounted on the electric tractor and is compatible with the electric drive of the tractor, ensuring the normal and stable operation of the electric tractor.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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 transmission system, characterized in that, include: A walking motor (1) is configured to transmit walking power to the drive axle; as well as The working motor (2) is configured to transmit working power to the working device and / or provide walking power to the drive axle.

2. The transmission system according to claim 1, characterized in that, The walking motor (1) is configured to transmit walking power to the rear axle (27) and / or the front axle (3).

3. The transmission system according to claim 2, characterized in that, The transmission system also includes: The walking input shaft (4) is connected to the power output end of the walking motor (1) via a transmission connection. An idler shaft (5) is arranged parallel to the travel input shaft (4) and is connected to the travel input shaft (4) via a first gear set; and A walking transmission mechanism is driven between the idler shaft (5) and the drive axle to allow the walking motor (1) to transmit walking power to the drive axle.

4. The transmission system according to claim 3, characterized in that, The walking transmission mechanism includes: The front axle output shaft (6) is arranged in parallel with the idler shaft (5) and is fitted with a front axle output shaft gear (8), which meshes with the idler shaft drive gear (7) provided on the idler shaft (5). A first engagement sleeve (9), which is disposed on the front axle output shaft (6) and is slidable along the axial direction of the front axle output shaft (6), so as to selectively drive the front axle output shaft (6) to the front axle output shaft gear (8); and A front drive shaft (10) is driveably connected between the front axle output shaft (6) and the front axle (3) to allow the front axle output shaft (6) to transmit driving power to the front axle (3) through the front drive shaft (10).

5. The transmission system according to claim 3, characterized in that, The walking transmission mechanism includes: The rear axle output shaft (11) is arranged parallel to the idler shaft (5) and is provided with a rear axle output shaft gear that meshes with the idler shaft drive gear (7) on the idler shaft (5); A rear drive shaft (12), which is drively connected to the rear axle output shaft (11); and An active bevel gear shaft (13) is driveably connected between the rear drive shaft (12) and the rear axle (27) to allow the rear axle output shaft (11) to transmit travel power to the rear axle (27) through the rear drive shaft (12) and the active bevel gear shaft (13).

6. The transmission system according to claim 1, characterized in that, The transmission system also includes: A power input shaft (14) is connected to the power output end of the working motor (2); and A working transmission mechanism is driven between the power input shaft (14) and the working device to allow the working motor (2) to transmit the working power to the working device.

7. The transmission system according to claim 6, characterized in that, The transmission system includes: A driven gear (16) for travel, which is sleeved on the drive bevel gear shaft (13) that is connected to the drive axle for transmission, and meshes with the drive gear (15) for travel on the power input shaft (14); and The second engagement sleeve (17) is disposed on the active bevel gear shaft (13) and is slidable along the axial direction of the active bevel gear shaft (13) to selectively drive the active bevel gear shaft (13) to the walking drive passive gear (16) so as to allow the working motor (2) to selectively transmit the working power to the drive axle.

8. The transmission system according to claim 6, characterized in that, The working transmission mechanism includes a hydraulic output shaft (18), which is arranged in parallel with the power input shaft (14) and is connected to the power input shaft (14) via a second gear set. The hydraulic output shaft (18) is connected to the input end of the hydraulic pump (19).

9. The transmission system according to claim 6, characterized in that, The working transmission mechanism includes a clutch input shaft (20) that is driven to the power input shaft (14), a clutch output shaft (22) that is connected to the clutch input shaft (20) via a clutch (21), and a power output shaft (23) that is driven to the clutch output shaft (22). The power output shaft (23) is driven to the working device.

10. An electric tractor, characterized in that, The electric tractor includes a transmission system according to any one of claims 1-9.

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