Transmission system and tractor

Abstract

The utility model relates to the technical field of tractors, and discloses a transmission system and a tractor. The transmission system comprises a generator, a driving motor and a variable-speed transmission mechanism, and the generator is in transmission connection with the engine to be driven by the engine to generate electricity; the driving motor is arranged to be capable of receiving electric power supplied by the generator to output walking power, and the variable speed transmission mechanism is in transmission connection between the driving motor and the driving axle so as to allow the driving motor to transmit the walking power to the driving axle through the variable speed transmission mechanism. The engine drives the generator to rotate, so that the generator generates electric energy, the generated electric energy is supplied to the driving motor to drive the variable-speed transmission mechanism to move, the variable-speed transmission mechanism is arranged between the driving motor and the driving axle, and the driving motor transmits walking power to the driving axle at different speeds and torques through the variable-speed transmission mechanism; the rotating speed of the driving motor is changed according to the load and the working condition, so that the engine can keep stable rotating speed, and oil consumption is remarkably reduced.

Description

Technical Field

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

[0002] Farmland in hilly areas is characterized by large undulations, steep slopes and bends, and narrow farm roads. The complexity and diversity of hilly and mountainous terrain makes mechanized operations difficult, results in poor work quality, and makes machinery prone to tipping over.

[0003] However, existing tractors rely solely on the engine for power input, with the engine directly driving the tires. This requires adjusting the engine speed according to load and operating conditions, preventing the engine from operating at its optimal speed for extended periods and increasing fuel consumption. Utility Model Content

[0004] The purpose of this invention is to provide a transmission system and tractor to solve the technical problem that existing mountain and hilly tractor transmission systems need to adjust the engine speed according to the load and working conditions, which increases fuel consumption.

[0005] To achieve the above objectives, this utility model provides a transmission system, comprising: a generator, which is driveably connected to an engine so that the engine can drive the generator to generate electricity; a drive motor, which is configured to receive power supplied by the generator to output walking power; and a transmission mechanism, which is driveably connected between the drive motor and the drive axle so that the drive motor can transmit the walking power to the drive axle through the transmission mechanism.

[0006] In some embodiments, the transmission system includes: a first power input shaft, which is driven to the power output end of the engine, and the generator is driven to the first power input shaft via a first gear set; and a second power input shaft, which is coaxially arranged with the first power input shaft and sleeved outside the first power input shaft, and is driven to the drive motor via a second gear set, and the speed transmission mechanism is driven to the drive motor via the second power input shaft.

[0007] In some embodiments, the transmission mechanism includes: a high-speed drive gear and a low-speed drive gear disposed on the second power input shaft; a first bevel gear shaft arranged parallel to each other relative to the first power input shaft and the second power input shaft; a high-speed driven gear and a low-speed driven gear respectively sleeved on the first bevel gear shaft and meshing with the high-speed drive gear and the low-speed drive gear; and a first engagement sleeve sleeved on the first bevel gear shaft and capable of sliding along the axial direction of the first bevel gear shaft to selectively drive the first bevel gear shaft to the high-speed driven gear or the low-speed driven gear.

[0008] In some embodiments, the transmission system includes a front drive axle assembly driven to the transmission mechanism and including a first differential and front axle half-shafts connected to both sides of the first differential via a first planetary gear mechanism, the end of the front axle half-shafts away from the first differential being connected to a front wheel; and / or, the transmission system includes a rear drive axle assembly driven to the transmission mechanism and including a second differential and rear axle half-shafts connected to both sides of the second differential via a second planetary gear mechanism, the end of the rear axle half-shafts away from the second differential being connected to a rear wheel.

[0009] In some embodiments, the hub of the front wheel is connected to the front axle half-shaft via a steering knuckle, which is drive-connected to a steering cylinder.

[0010] In some embodiments, the transmission system includes a first driveshaft and a second driveshaft respectively disposed in the slack steering mechanism, wherein the rear drive axle assembly is driven to the transmission mechanism via the first driveshaft, the engine is driven to the work power transmission assembly via the second driveshaft, and the slack steering mechanism is configured to allow the front drive axle assembly and the rear drive axle assembly to rotate relative to each other.

[0011] In some embodiments, the rear drive axle assembly includes a second bevel gear shaft that is driveably connected between the first driveshaft and the second differential.

[0012] In some embodiments, the working power transmission assembly includes a working power input shaft that is driveably connected to the second drive shaft, a working power output drive shaft that is connected to the working power input shaft via a PTO clutch, and a working power output driven shaft for connecting the working mechanism.

[0013] In some embodiments, the working power output drive shaft is provided with a first working power drive gear and a second working power drive gear, and the working power output driven shaft is sleeved with a first working power driven gear and a second working power driven gear that respectively mesh with the first working power drive gear and the second working power drive gear, as well as a second meshing sleeve for selectively connecting the working power output driven shaft to the first working power driven gear or the second working power driven gear.

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

[0015] Through the above technical solution, the engine drives the generator connected to it to rotate, thereby generating electrical energy. The electrical energy generated by the generator supplies the drive motor, which in turn drives the transmission mechanism. The transmission mechanism is located between the drive motor and the drive axle, serving the functions of transmission and speed change. This allows the drive motor to transmit the driving power to the drive axle at different speeds and torques through the transmission mechanism. By changing the voltage and frequency of the drive motor, the speed of the drive motor is controlled, thereby meeting the vehicle's operating speed requirements and reducing the number of gears in the transmission system. Without changing the engine speed, the speed of the drive motor is changed according to the load and operating conditions to adjust the transmission speed of the transmission mechanism, which in turn adjusts the speed of the drive axle, allowing the engine to maintain a stable speed and significantly reducing fuel consumption.

[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 This is a schematic diagram of the transmission system provided in an embodiment of the present disclosure.

[0019] Explanation of reference numerals in the attached figures

[0020] 1. Generator; 11. First drive gear; 12. First driven gear; 2. Engine; 3. Drive motor; 31. Second drive gear; 32. Second driven gear; 4. Transmission mechanism; 41. High-speed drive gear; 42. Low-speed drive gear; 43. High-speed driven gear; 44. Low-speed driven gear; 45. First meshing sleeve; 46. First drive bevel gear; 47. First driven bevel gear; 5. Front drive axle assembly; 51. First differential; 52. First sun gear; 53. First planetary carrier; 54. Front wheel; 55. Steering knuckle; 56. Steering cylinder; 6. Rear drive axle assembly; 61. Second differential; 62. 63. Second sun gear; 64. Second planetary carrier; 7. Rear wheel; 8. Bending steering mechanism; 9. First drive shaft; 10. Second drive shaft; 11. Working power transmission assembly; 12. PTO clutch; 13. First working power drive gear; 14. Second working power drive gear; 15. First working power driven gear; 16. Second working power driven gear; 17. Second meshing sleeve; 18. Torsional damper; 19. First power input shaft; 10. Second power input shaft; 11. First bevel gear shaft; 12. Second bevel gear shaft; 13. First bevel gear shaft; 14. Second bevel gear shaft; 15. Working power input shaft; 16. Working power output drive shaft; 17. Working power output driven shaft. 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 1This utility model provides a transmission system, including a generator 1, a drive motor 3, and a speed transmission mechanism 4. The generator 1 is connected to an engine 2 so that the engine 2 can drive the generator 1 to generate electricity. The drive motor 3 is configured to receive power supplied by the generator 1 to output walking power. The speed transmission mechanism 4 is connected between the drive motor 3 and the drive axle so that the drive motor 3 can transmit walking power to the drive axle through the speed transmission mechanism 4. Engine 2 drives generator 1, which is connected to it, to rotate, thereby generating electrical energy. The electrical energy generated by generator 1 supplies drive motor 3, which in turn drives transmission mechanism 4. Transmission mechanism 4 is located between drive motor 3 and drive axle, serving the functions of transmission and speed change. This allows drive motor 3 to transmit driving power to drive axle at different speeds and torques through transmission mechanism 4. When engine 2 is running, it drives generator 1 to generate electrical energy, which is supplied to drive motor 3. The driving power generated by drive motor 3 is transmitted to drive axle through transmission mechanism 4 to drive the vehicle forward. Drive motor 3 has stepless speed regulation, and its speed is controlled by changing its voltage and frequency, thereby meeting the vehicle's operating speed requirements and reducing the number of gears in the transmission system. Compared with existing technologies that directly drive drive axle from engine 2, this transmission system, without changing the engine 2's speed, adjusts the speed of drive motor 3 according to load and operating conditions to regulate the transmission speed of transmission mechanism 4, and thus regulates the speed of drive axle. This allows engine 2 to maintain a stable speed, thereby significantly reducing fuel consumption.

[0023] In some embodiments, the drive motor 3 is a travel motor. The travel motor features precise positioning, high torque, and low power consumption, enabling it to maintain a stable speed under different loads and achieve precise speed control to meet the needs of long-distance vehicle travel and traction transportation.

[0024] In some embodiments, the transmission system further includes a battery capable of storing electrical energy generated by the generator 1 and supplying the stored electrical energy to the drive motor 3. The battery configuration reduces energy loss during the transfer of electrical energy from the generator 1 to the drive motor 3, thereby lowering the energy consumption of the transmission system.

[0025] In some embodiments, the electrical energy generated by the generator 1 is transmitted to the drive motor 3 to output walking power, and stored in the battery to supply power to the drive motor 3.

[0026] In some implementations, the electrical energy generated by the generator 1 is directly stored in the battery, and then the battery supplies power to the drive motor 3.

[0027] In some embodiments, the transmission system includes a first power input shaft S1 and a second power input shaft S2. The first power input shaft S1 is connected to the power output end of the engine 2. The generator 1 is connected to the first power input shaft S1 via a first gear set. The second power input shaft S2 is coaxially arranged with the first power input shaft S1 and sleeved outside the first power input shaft S1. The second power input shaft S2 is connected to the drive motor 3 via a second gear set. The transmission mechanism 4 is connected to the drive motor 3 via the second power input shaft S2. The engine 2 drives the generator 1 to generate electricity via the first power input shaft S1 and the first gear set connected to the first power input shaft S1. The drive motor 3, powered by the generator 1, transmits the walking power to the transmission mechanism 4 via the second gear set and the second power input shaft S2 connected to the second gear set, thereby realizing the walking and speed changing of the transmission mechanism 4.

[0028] In some embodiments, the second power input shaft S2 is a hollow shaft coaxially mounted with the first power input shaft S1.

[0029] In some embodiments, the first gear set includes a first driving gear 11 and a first driven gear 12. The first driving gear 11 is coaxially and fixedly mounted on the first power input shaft S1, and the first driven gear 12 is drivenly connected to the input end of the generator 1, with the first driving gear 11 and the first driven gear 12 meshing together. When the first power input shaft S1 rotates under the drive of the engine 2, the first driving gear 11, fixedly mounted on the first power input shaft S1, also rotates, thereby driving the first driven gear 12 to rotate and driving the generator 1 to generate electricity.

[0030] In some embodiments, the second gear set includes a second driving gear 31 and a second driven gear 32. The second driving gear 31 is connected to the output end of the drive motor 3, and the second driven gear 32 is fixedly mounted on one end of the second power input shaft S2 and can drive the second power input shaft S2 to rotate. The second driving gear 31 and the second driven gear 32 are meshed together. When the output end of the drive motor 3 rotates, the second driving gear 31 and the second driven gear 32 meshing with the second driving gear 31 rotate, thereby driving the second power input shaft S2 to rotate, so as to transmit the walking power to the transmission mechanism 4.

[0031] In some embodiments, the first power input shaft S1 is fixedly connected to the first drive gear 11 via a spline.

[0032] Those skilled in the art will understand that the connection method between the first power input shaft S1 and the first drive gear 11 in this utility model is not limited to the spline mentioned above. Other structural forms that can achieve the connection between the first power input shaft S1 and the first drive gear 11, such as snap-fit, should also be within the protection scope of this utility model.

[0033] In some embodiments, the second power input shaft S2 is fixedly connected to the second driven gear 32 via a spline.

[0034] Those skilled in the art will understand that the connection method between the second power input shaft S2 and the second driven gear 32 in this utility model is not limited to the spline mentioned above. Other structural forms that can achieve the connection between the second power input shaft S2 and the second driven gear 32, such as snap-fit, should also fall within the protection scope of this utility model.

[0035] In some embodiments, the first power input shaft S1 is connected to the power output end of the engine 2 via a torsional damper 9. The torsional damper 9 can reduce the torsional stiffness of the joint between the power output end of the engine 2 and the first power input shaft S1, reduce resonance caused by torsional vibration of the transmission system, and improve the driving stability of the vehicle.

[0036] In some embodiments, the transmission mechanism 4 includes a high-speed drive gear 41 and a low-speed drive gear 42, a first bevel gear shaft S3, a high-speed driven gear 43 and a low-speed driven gear 44, and a first engagement sleeve 45, all mounted on the second power input shaft S2. The first bevel gear shaft S3 is arranged parallel to the first power input shaft S1 and the second power input shaft S2. The high-speed driven gear 43 and the low-speed driven gear 44 are respectively mounted on the first bevel gear shaft S3 and mesh with the high-speed drive gear 41 and the low-speed drive gear 42. The first engagement sleeve 45 is mounted on the first bevel gear shaft S3 and can slide along the axial direction of the first bevel gear shaft S3 to selectively drive the first bevel gear shaft S3 to the high-speed driven gear 43 or the low-speed driven gear 44. The second power input shaft S2 rotates under the drive of the drive motor 3. The high-speed drive gear 41 and the low-speed drive gear 42 located at the other end of the second power input shaft S2 also rotate, thereby causing the high-speed driven gear 43 and the low-speed driven gear 44 meshing with it to rotate. Through the sliding of the first meshing sleeve 45, one of the high-speed driven gear 43 and the low-speed driven gear 44 is connected to the first bevel gear shaft S3, thereby realizing the rotation of the first bevel gear shaft S3 to drive the drive axle to move.

[0037] In this embodiment, the engagement of the high-speed drive gear 41 and the high-speed driven gear 43, as well as the engagement of the low-speed drive gear 42 and the low-speed driven gear 44, allows the first bevel gear shaft S3 to rotate at different speeds, thereby enabling the drive axle to rotate at different speeds and achieve gear shifting. Only two gears, high-speed and low-speed, are needed to achieve different speeds for the drive axle, reducing the number of gears, thus reducing the size of the transmission system and the frequency of gear shifting during operation, improving work efficiency, and reducing labor intensity.

[0038] In some embodiments, the transmission system includes a front drive axle assembly 5, which is driven to a transmission mechanism 4 and includes a first differential 51 and front axle half-shafts connected to both sides of the first differential 51 via a first planetary gear mechanism, with a front wheel 54 connected to the end of the front axle half-shafts away from the first differential 51; and / or, the transmission system includes a rear drive axle assembly 6, which is driven to a transmission mechanism 4 and includes a second differential 61 and rear axle half-shafts connected to both sides of the second differential 61 via a second planetary gear mechanism, with a rear wheel 64 connected to the end of the rear axle half-shafts away from the second differential 61. The connection between the front drive axle assembly 5 and the rear drive axle assembly 6 and the transmission mechanism 4 enables the front drive axle assembly 5 and the rear drive axle assembly 6 to move, thereby enabling the vehicle to travel. The driving power of the transmission mechanism 4 is transmitted to the front wheel 54 through the first differential 51, the first planetary gear mechanism and the front axle half shaft, and to the rear wheel 64 through the second differential 61, the second planetary gear mechanism and the rear axle half shaft, driving the front wheel 54 and the rear wheel 64 to rotate, ensuring the vehicle's movement. At the same time, the first differential 51 and the second differential 61 can adjust the speed difference between the left wheel and the right wheel, so that the left wheel and the right wheel rotate at different speeds, ensuring the vehicle's curved driving.

[0039] In some embodiments, the first planetary gear mechanism includes a first sun gear 52 and a first planet carrier 53. The first sun gear 52 is driven to the output end of the first differential 51, the first planet carrier 53 is driven to the first sun gear 52, and the first planet carrier 53 is connected to the front axle half shaft.

[0040] In some embodiments, the first sun gear 52 is connected to the first differential 51 via a spline, and the first planetary carrier 53 is connected to the front axle half-shaft via a spline.

[0041] In some embodiments, the second planetary gear mechanism includes a second sun gear 62 and a second planetary carrier 63. The second sun gear 62 is driven to the output end of the second differential 61, the second planetary carrier 63 is driven to the second sun gear 62, and the second planetary carrier 63 is connected to the rear axle half-shaft.

[0042] In some embodiments, the second sun gear 62 is splined to the second differential 61, and the second planetary carrier 63 is splined to the rear axle half-shaft.

[0043] In some embodiments, a first driving bevel gear 46 is provided at one end of the first bevel gear shaft S3, and a first driven bevel gear 47 is mounted on the first differential 51. The first driving bevel gear 46 and the first driven bevel gear 47 mesh. The rotation of the first bevel gear shaft S3 drives the first driving bevel gear 46 to rotate, thereby driving the first differential 51 to rotate.

[0044] In some embodiments, the first driven bevel gear 47 is mounted to the first differential 51 by a bolted structure.

[0045] Those skilled in the art will understand that the connection between the first driven bevel gear 47 and the first differential 51 in this utility model is not limited to the bolt structure described above. Other structural forms that can achieve a detachable connection between the first driven bevel gear 47 and the first differential 51 should also fall within the protection scope of this utility model.

[0046] In some embodiments, the hub of the front wheel 54 is connected to the front axle half-shaft via a steering knuckle 55, which is drive-connected to the steering cylinder 56. The steering knuckle 55 can transmit the power output from the first differential 51 to the front wheel 54 to achieve rotation of the front wheel 54; the steering cylinder 56 changes the direction of the front wheel 54 by pushing or pulling the steering knuckle 55, thereby achieving vehicle steering.

[0047] In some implementations, the steering cylinder 56 is connected to the steering knuckle 55 via a pin.

[0048] In some embodiments, the drivetrain also includes a slack steering mechanism 7 disposed between the front drive axle assembly 5 and the rear drive axle assembly 6. The slack steering mechanism 7 can perform power transmission and vehicle slack steering, enabling flexible steering and driving of the vehicle. The front drive axle assembly 5 and the rear drive axle assembly 6 rotate relative to each other around a hinge point, thereby reducing the turning radius of the vehicle and improving driving flexibility. The combined steering scheme of the front drive axle assembly 5 and the slack steering mechanism 7 reduces the vehicle's turning radius to meet the steering requirements when operating on small plots of land.

[0049] In some embodiments, the transmission system includes a first driveshaft 71 and a second driveshaft 72 respectively disposed in the folding steering mechanism 7. The rear drive axle assembly 6 is driven to the transmission mechanism 4 via the first driveshaft 71, and the engine 2 is driven to the working power transmission assembly 8 via the second driveshaft 72. The folding steering mechanism 7 is configured to allow relative rotation between the front drive axle assembly 5 and the rear drive axle assembly 6. The first driveshaft 71 connects the transmission mechanism 4 and the rear drive axle assembly 6 to drive the rear wheels 64. The second driveshaft 72 connects the first power input shaft S1 and the working power transmission assembly 8, transmitting power from the engine 2 to the working power transmission assembly 8 to drive the working mechanism connected to the working power transmission assembly 8. The relative rotation of the front drive axle assembly 5 and the rear drive axle assembly 6 can be relative torsion, folding, or simultaneous torsion and folding.

[0050] In some embodiments, the second drive shaft 72 is coaxially arranged with the first power input shaft S1, and the first drive shaft 71 is arranged parallel to the second drive shaft 72.

[0051] In some embodiments, the rear drive axle assembly 6 includes a second bevel gear shaft S4 that is driveably connected between a first driveshaft 71 and a second differential 61. The second bevel gear shaft S4 is used to transmit power from the first driveshaft 71 to the second differential 61 to drive the rotation of the rear wheels 64.

[0052] In some embodiments, a second driving bevel gear is provided at one end of the second bevel gear shaft S4, and a second driven bevel gear is mounted on the second differential 61. The second driving bevel gear and the second driven bevel gear mesh. The rotation of the second bevel gear shaft S4 drives the second driving bevel gear to rotate, and the second driven bevel gear rotates accordingly, thereby driving the second differential 61 to rotate, which in turn drives the rear wheel 64 to rotate.

[0053] In some embodiments, the second driven bevel gear is mounted to the second differential 61 by a bolted structure.

[0054] Those skilled in the art will understand that the connection between the second driven bevel gear and the second differential 61 of this utility model is not limited to the bolt structure described above. Other structural forms that can achieve the connection between the second driven bevel gear and the second differential 61 should also be within the protection scope of this utility model.

[0055] In some embodiments, splines are provided at both ends of the first drive shaft 71, and the two ends of the first drive shaft 71 are respectively connected to the first bevel gear shaft S3 and the second bevel gear shaft S4 via splines.

[0056] In some embodiments, the working power transmission assembly 8 includes a working power input shaft S5 that is driveably connected to the second drive shaft 72, a working power output drive shaft S6 connected to the working power input shaft S5 via a PTO clutch 81, and a working power output driven shaft S7 for connecting the working mechanism. The PTO clutch 81 can control the working power output drive shaft S6, and the power from the engine 2 is transmitted to the working mechanism via the first power input shaft S1, the second drive shaft 72, the working power input shaft S5, the PTO clutch 81, the working power output drive shaft S6, and the working power output driven shaft S7 to drive the working mechanism.

[0057] In some embodiments, splines are provided at both ends of the second drive shaft 72. The two ends of the second drive shaft 72 are connected to the first power input shaft S1 and the working power input shaft S5 respectively via splines. The working power input shaft S5 is connected to the PTO clutch 81 via splines.

[0058] In some embodiments, the first power input shaft S1, the second power input shaft S2, the second transmission shaft 72, the working power input shaft S5, and the working power output drive shaft S6 are all coaxially arranged; the first bevel gear shaft S3, the first transmission shaft 71, and the second bevel gear shaft S4 are coaxially arranged; and the first power input shaft S1, the first bevel gear shaft S3, and the working power output driven shaft S7 are arranged in parallel.

[0059] In some embodiments, the working power output drive shaft S6 is provided with a first working power drive gear 82 and a second working power drive gear 83, and the working power output driven shaft S7 is fitted with a first working power driven gear 84 and a second working power driven gear 85 respectively meshing with the first working power drive gear 82 and the second working power drive gear 83, as well as a second meshing sleeve 86 for selectively connecting the working power output driven shaft S7 to the first working power driven gear 84 or the second working power driven gear 85. The working power output drive shaft S6 rotates under the drive of the PTO clutch 81. The first working power drive gear 82 and the second working power drive gear 83, which are set on the working power output drive shaft S6, also rotate accordingly. This causes the first working power driven gear 84 and the second working power driven gear 85, which are respectively meshed with it, to rotate. Through the sliding of the second meshing sleeve 86, one of the first working power driven gear 84 and the second working power driven gear 85 is connected to the working power output driven shaft S7, driving the working power output driven shaft S7 to rotate, thereby driving the working mechanism to move. Through the cooperation of the first working power drive gear 82 and the first working power driven gear 84, and the cooperation of the second working power drive gear 83 and the second working power driven gear 85, the working power output driven shaft S7 has different rotational speeds, thereby giving the working mechanism different speeds and realizing the change of different gears.

[0060] In another aspect, this utility model provides a tractor, which includes the transmission system of any of the above-described embodiments. The tractor equipped with the above-described transmission system has a smaller number of gears to achieve speed changes, and steering via the front wheel 54 reduces the turning radius; a hybrid system consisting of an engine 2, a generator 1, and a drive motor 3 replaces the traditional pure engine fuel drive, allowing the engine 2 to operate at a low fuel consumption speed without needing to change with load, thus reducing fuel consumption.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 generator (1) is connected to an engine (2) so that the engine (2) can drive the generator (1) to generate electricity; A drive motor (3) is configured to receive power supplied by the generator (1) to output walking power; as well as, A transmission mechanism (4) is provided, which is connected to the drive motor (3) and the drive axle to allow the drive motor (3) to transmit the walking power to the drive axle through the transmission mechanism (4).

2. The transmission system according to claim 1, characterized in that, The transmission system includes: A first power input shaft (S1) is connected to the power output end of the engine (2), and the generator (1) is connected to the first power input shaft (S1) via a first gear set; and, The second power input shaft (S2) is coaxially arranged with the first power input shaft (S1) and sleeved outside the first power input shaft (S1). The second power input shaft (S2) is connected to the drive motor (3) through a second gear set. The speed transmission mechanism (4) is connected to the drive motor (3) through the second power input shaft (S2).

3. The transmission system according to claim 2, characterized in that, The speed transmission mechanism (4) includes: High-speed drive gear (41) and low-speed drive gear (42) are provided on the second power input shaft (S2); The first bevel gear shaft (S3) is arranged parallel to each other relative to the first power input shaft (S1) and the second power input shaft (S2); A high-speed driven gear (43) and a low-speed driven gear (44), which are respectively sleeved on the first bevel gear shaft (S3) and mesh with the high-speed driving gear (41) and the low-speed driving gear (42); and, The first engagement sleeve (45) is disposed on the first bevel gear shaft (S3) and can slide along the axial direction of the first bevel gear shaft (S3) to selectively drive the first bevel gear shaft (S3) to the high-speed driven gear (43) or the low-speed driven gear (44).

4. The transmission system according to claim 1, characterized in that, The transmission system includes a front drive axle assembly (5) which is driveably connected to the transmission mechanism (4) and includes a first differential (51) and front axle half-shafts connected to both sides of the first differential (51) via a first planetary gear mechanism. A front wheel (54) is connected to the end of the front axle half-shaft furthest from the first differential (51); and / or, The transmission system includes a rear drive axle assembly (6) which is drive-connected to the transmission mechanism (4) and includes a second differential (61) and rear axle half shafts connected to both sides of the second differential (61) via a second planetary gear mechanism. The rear axle half shafts are connected to a rear wheel (64) at the end away from the second differential (61).

5. The transmission system according to claim 4, characterized in that, The hub of the front wheel (54) is connected to the front axle half shaft via a steering knuckle (55), which is driven to the steering cylinder (56).

6. The transmission system according to claim 4, characterized in that, The transmission system includes a first drive shaft (71) and a second drive shaft (72) respectively disposed in the folding steering mechanism (7), wherein the rear drive axle assembly (6) is driven to the transmission mechanism (4) via the first drive shaft (71), the engine (2) is driven to the working power transmission assembly (8) via the second drive shaft (72), and the folding steering mechanism (7) is configured to allow the front drive axle assembly (5) and the rear drive axle assembly (6) to rotate relative to each other.

7. The transmission system according to claim 6, characterized in that, The rear drive axle assembly (6) includes a second bevel gear shaft (S4) that is driveably connected between the first drive shaft (71) and the second differential (61).

8. The transmission system according to claim 6, characterized in that, The working power transmission assembly (8) includes a working power input shaft (S5) that is connected to the second transmission shaft (72), a working power output drive shaft (S6) that is connected to the working power input shaft (S5) via a PTO clutch (81), and a working power output driven shaft (S7) for connecting the working mechanism.

9. The transmission system according to claim 8, characterized in that, The working power output drive shaft (S6) is provided with a first working power drive gear (82) and a second working power drive gear (83). The working power output driven shaft (S7) is provided with a first working power driven gear (84) and a second working power driven gear (85) respectively meshing with the first working power drive gear (82) and the second working power drive gear (83), and a second meshing sleeve (86) for selectively connecting the working power output driven shaft (S7) to the first working power driven gear (84) or the second working power driven gear (85).

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

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