Tractor transmission device and tractor

Abstract

The utility model discloses a tractor transmission device and a tractor, and belongs to the technical field of tractors. The tractor transmission device comprises an engine, a generator, a power motor, a gearbox, a rear axle box and a transmission shaft. The engine, the generator, the power motor, the gearbox and the rear axle box are sequentially connected in the first direction. The engine is connected with a flywheel, the generator comprises a rotor, and the rotor is connected with the flywheel through a damper; one end of the transmission shaft sequentially penetrates through the rear axle box, the gearbox and the power motor in the first direction to be connected with the rotor, and the other end of the transmission shaft extends out of the rear axle box to form a power output end. According to the tractor transmission device, the shock absorber is arranged between the generator and the flywheel, vibration of the whole structure can be reduced, and the service life of the engine and the generator is prolonged; the generator does not need to consider a hollow structure, so that the design and processing cost is saved; the power transmission shaft is shorter, the cost is lower, and the vibration is smaller; the tractor transmission device is simple and reliable in structure and low in cost.

Description

Technical Field

[0001] This utility model relates to the technical field of tractors, and more specifically, to a tractor transmission device and a tractor. Background Technology

[0002] In agricultural mechanization, tractors, due to their versatility and high efficiency, have become indispensable key equipment in agricultural production. Tractors mainly consist of several parts, including an engine, power output system, transmission, and working device. With the development of agricultural technology, the performance requirements for tractors are constantly increasing, especially in terms of power transmission and vibration and noise reduction. Traditional tractor transmissions typically use a single driveshaft, with one end directly connected to the engine and the other end connected to the power output. While this design is simple, it presents several problems in practical use. First, because the driveshaft is rigidly connected to the engine—that is, directly connected to the engine's flywheel—the vibration of the flywheel during engine operation is directly transmitted to the driveshaft, leading to a shortened lifespan and a higher risk of breakage. This is undoubtedly a significant hidden danger for agricultural machinery that requires long-term, high-load operation. Furthermore, the rigid connection also generates considerable noise, affecting the working environment and physical and mental health of the operators.

[0003] In a tractor's power transmission system, the generator, as a crucial auxiliary device, directly impacts the overall performance of the machine through its connection to the engine. In traditional designs, the drive shaft connects to the engine flywheel, necessitating a hollow generator shaft. However, this hollow structure not only increases the complexity of the generator design, leading to greater manufacturing difficulties and higher costs, but also, due to the large rotor inertia, the rigid connection to the engine can exacerbate engine bearing wear and may even induce engine resonance, affecting engine stability and lifespan. Utility Model Content

[0004] This utility model provides a tractor transmission device and a tractor to overcome the technical problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A tractor transmission includes an engine, a generator, a power motor, a gearbox, a rear axle housing, and a drive shaft, wherein:

[0007] The engine, the generator, the power motor, the gearbox, and the rear axle housing are connected sequentially along a first direction;

[0008] The engine is connected to a flywheel, and the generator includes a rotor, which is connected to the flywheel via a shock absorber.

[0009] One end of the drive shaft passes sequentially through the rear axle housing, the gearbox, and the power motor along the first direction and is connected to the rotor. The other end of the drive shaft extends out of the rear axle housing to form a power output end.

[0010] By installing a shock absorber between the generator rotor and the engine flywheel, vibrations generated by the flywheel during engine operation can be effectively absorbed and buffered, significantly reducing the overall vibration level of the transmission system. The shock absorber provides an effective vibration buffer zone between the generator rotor and the engine flywheel, reducing the direct impact of severe flywheel vibrations on the driveshaft. This not only extends the service life of the driveshaft and reduces the risk of breakage, but also significantly reduces vibration-induced noise, improving the operator's working environment. Furthermore, the use of shock absorbers protects engine bearings, preventing additional wear caused by rigid connections, thereby extending the overall engine life and reducing maintenance and replacement costs. Therefore, this design not only improves the stability and reliability of the tractor during operation but also enhances the user experience and contributes to the overall performance optimization of the tractor.

[0011] Furthermore, in traditional tractor transmission systems, the generator shaft needs to be designed as a hollow structure. While this design fulfills the power transmission requirement to some extent, it introduces many disadvantages. The hollow generator shaft design is complex, increasing the manufacturing difficulty of the generator, especially for components requiring high-precision machining, which undoubtedly significantly increases production costs. In this invention, since the transmission shaft no longer needs to pass through the generator, it not only simplifies the design and reduces manufacturing difficulty but also improves the mechanical strength of the generator, making it more reliable during long-term, high-load operation.

[0012] Furthermore, the traditional tractor's driveshaft design is relatively long, which not only increases material costs but also leads to more design and manufacturing challenges due to the increased shaft length. Long driveshafts are prone to bending and breakage during power transmission, especially in complex agricultural operating environments where this risk is even more pronounced. In addition, the vibration of a long driveshaft during power transmission is more noticeable, further affecting the tractor's stability and operating comfort. This invention optimizes the driveshaft layout, thereby shortening its length. Specifically, one end of the driveshaft connects to the generator rotor, while the other end serves as the power output end. This design eliminates the need for the driveshaft to pass through the generator, thus reducing unnecessary length. The shortened driveshaft length not only reduces material costs but also simplifies the design and manufacturing process, improving the driveshaft's strength and rigidity and reducing the risk of bending and breakage. Simultaneously, the shorter driveshaft experiences less vibration during power transmission, further improving the tractor's stability and operating comfort, allowing the tractor to maintain good performance under various operating conditions.

[0013] Furthermore, the power motor is provided with a rotor shaft, and the gearbox is provided with a gear shaft;

[0014] The rotor shaft and the first gear shaft are hollow shafts, and the transmission shaft passes through the hollow portions of the first gear shaft and the rotor shaft before connecting to the rotor.

[0015] Furthermore, the gearbox is a two-speed gearbox.

[0016] Furthermore, the shock absorber is a torsional shock absorber.

[0017] Furthermore, the power output terminal is connected to an agricultural implement, and the power output terminal is configured to transmit power to the agricultural implement to drive the agricultural implement to operate.

[0018] Furthermore, the agricultural machinery mentioned is any one of harvesters, rotary tillers, seeders, fertilizer applicators, and planters.

[0019] This utility model's tractor transmission device can be flexibly connected to various types of agricultural implements, including harvesters, rotary tillers, seeders, fertilizer applicators, and planters. These implements perform different functions in agricultural operations, but all require efficient and stable power support from the tractor. Through the transmission device design of this utility model, the tractor can better meet the power needs of these different implements. For example, harvesters require greater power and higher stability during operation, and this utility model, through shock absorbers and an optimized connection structure, ensures smooth operation of the transmission system, reduces power loss, and thus provides more efficient and stable power support. Rotary tillers need to respond and adjust quickly under different soil conditions; this utility model's transmission system, by shortening the transmission path and reducing vibration, ensures the rotary tiller's immediate response and operational flexibility during operation. Seeders, fertilizer applicators, and planters have high requirements for the continuity and stability of power; this utility model's design effectively reduces interruptions and instability caused by engine vibration, improving the reliability and efficiency of these implements during operation. Therefore, this multi-functional connection design not only expands the tractor's applicability but also enhances its overall performance in various agricultural operations.

[0020] Furthermore, the drive shaft is made of stainless steel or alloy steel.

[0021] Furthermore, the surface of the drive shaft is chrome-plated to improve its wear resistance and corrosion resistance.

[0022] Drive shafts operate frequently in agricultural work and are subjected to various mechanical stresses and environmental factors, such as friction from soil particles and erosion from moisture. To further improve the service life and performance of drive shafts, this invention employs chrome plating, forming a chrome coating on the surface of the drive shaft. Chrome plating offers excellent wear resistance and corrosion resistance, significantly reducing surface wear and extending the service life of the drive shaft. Furthermore, the chrome plating increases the smoothness of the drive shaft surface, reducing frictional resistance and improving power transmission efficiency. This surface treatment method is particularly effective in improving the durability of components under high-load, high-wear environments. Through chrome plating, drive shafts are not only more durable but also maintain a high performance level during prolonged operation, reducing downtime for maintenance and improving the overall operating efficiency of the tractor and user satisfaction.

[0023] Furthermore, the drive shaft includes several detachable connecting sections, with adjacent connecting sections connected by splines or threads.

[0024] Traditional tractor driveshafts are typically designed as a single unit, requiring replacement of the entire shaft in case of failure, increasing maintenance costs and impacting operational efficiency. In this invention, the driveshaft is designed as several detachable connecting sections, with adjacent sections connected by splines or threads. These detachable sections greatly facilitate driveshaft maintenance; when a section fails or wears out, only that section needs replacement, eliminating the need for complete replacement and significantly reducing maintenance costs. Furthermore, this design allows for flexible adjustment of the driveshaft length to suit different implement installation positions and operating environments, improving the tractor's applicability and flexibility. In short, the detachable connecting section design not only enhances the reliability and maintenance convenience of the driveshaft but also optimizes the overall tractor user experience and reduces overall costs for the user.

[0025] A tractor comprising the aforementioned tractor transmission.

[0026] This utility model proposes a tractor that adopts the aforementioned transmission device. This tractor, through optimized transmission device design, significantly improves the efficiency and reliability of power transmission, reducing many common problems in traditional designs, such as high vibration, high noise, and easy wear. Specifically, the use of shock absorbers effectively absorbs the vibration of the engine flywheel, extends the service life of the drive shaft, and improves engine stability; the generator shaft no longer requires a hollow structure, simplifying the design and reducing processing difficulty and cost; the shortened length of the drive shaft further reduces vibration and material costs; the material selection and surface treatment of the drive shaft improve its mechanical properties and corrosion resistance; and the detachable connection section design makes maintenance more convenient and reduces repair costs. These technological optimizations not only enhance the overall performance of the tractor but also improve the working environment for operators, increasing work efficiency and user satisfaction. Therefore, this new tractor not only has significant advantages in function and performance but also excels in economy and user experience, possessing broad market application prospects.

[0027] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0028] 1. A shock absorber is installed between the generator and the flywheel, which can reduce the vibration of the entire structure and increase the service life of the engine and generator;

[0029] 2. The generator does not require a hollow structure, saving design and manufacturing costs;

[0030] 3. The drive shaft is shorter, resulting in lower cost and less vibration;

[0031] 4. The front end of the drive shaft is connected to the generator rotor, and the rear end of the drive shaft is connected to the power output mechanism. The structure is simple, reliable, and low in cost. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the internal structure of a tractor transmission device provided in one embodiment of this application;

[0034] Figure 2 This is a simplified structural diagram of a tractor transmission device provided in one embodiment of this application;

[0035] Figure 3 for Figure 1 The diagram shows the connection between the drive shaft and the rotor in the tractor transmission system.

[0036] Figure 4 This is a three-dimensional structural schematic diagram of a tractor transmission device provided in one embodiment of this application;

[0037] Explanation of markings in the diagram:

[0038] 1. Engine; 101. Flywheel;

[0039] 2. Shock absorbers;

[0040] 3. Generator; 301. Rotor;

[0041] 4. Power motor;

[0042] 5. Gearbox;

[0043] 6. Rear axle housing;

[0044] 7. Drive shaft; 701. Power output end. Detailed Implementation

[0045] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0046] It should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this application to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. The same reference numerals denote the same elements throughout.

[0047] In the description of this utility model, it should be understood that the terms "left side," "right side," "upper part," "lower part," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. The specific dimensions used in the embodiments are only for illustrating the technical solution and do not limit the protection scope of this utility model. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art.

[0048] Unless otherwise expressly specified and limited, the terms "installation," "setting," "connection," and "fixation" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] To fully understand this application, a detailed structure will be presented in the following description to illustrate the technical solutions proposed in this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0050] Example 1:

[0051] like Figure 1-4 As shown, this utility model provides a technical solution:

[0052] A tractor transmission device includes an engine 1, a generator 3, a power motor 4, a gearbox 5, a rear axle housing 6, and a drive shaft 7, wherein:

[0053] The engine 1, the generator 3, the power motor 4, the gearbox 5, and the rear axle box 6 are connected sequentially along a first direction;

[0054] The engine 1 is connected to a flywheel 101, and the generator 3 includes a rotor 301, which is connected to the flywheel 101 via a shock absorber 2.

[0055] One end of the drive shaft 7 passes sequentially through the rear axle housing 6, the gearbox 5, and the power motor 4 along the first direction and is connected to the rotor 301. The other end of the drive shaft 7 extends out of the rear axle housing 6 to form a power output end 701.

[0056] By installing a shock absorber 2 between the rotor 301 of the generator 3 and the flywheel 101 of the engine 1, the vibration generated by the flywheel 101 during engine 1 operation can be effectively absorbed and buffered, thereby significantly reducing the overall vibration level of the transmission system. The shock absorber 2 provides an effective vibration buffer zone between the generator rotor and the engine flywheel, reducing the direct impact of severe flywheel 101 vibration on the drive shaft 7. This not only extends the service life of the drive shaft 7 and reduces the risk of shaft breakage, but also significantly reduces noise caused by vibration, improving the operator's working environment. Furthermore, the use of the shock absorber 2 protects the engine bearings, preventing additional wear caused by hard connections, thereby extending the overall service life of the engine 1 and reducing maintenance and replacement costs. Therefore, this design not only improves the stability and reliability of the tractor during operation but also enhances the user experience and contributes to the overall performance optimization of the tractor.

[0057] Furthermore, in traditional tractor transmission systems, the generator shaft of generator 3 needs to be designed as a hollow structure. While this design fulfills the power transmission requirement to a certain extent, it also introduces many disadvantages. The hollow generator shaft design is complex, increasing the manufacturing difficulty of generator 3, especially for components requiring high-precision machining, which undoubtedly significantly increases production costs. In this invention, since the transmission shaft 7 no longer needs to pass through the generator, it not only simplifies the design and reduces the machining difficulty but also improves the mechanical strength of generator 3, making generator 3 more reliable during long-term, high-load operation.

[0058] Furthermore, the traditional tractor's driveshaft 7 is designed to be relatively long, which not only increases material costs but also leads to more design and manufacturing challenges due to the increased shaft length. Long driveshafts are prone to bending and breakage during power transmission, especially in complex agricultural operating environments where this risk is more pronounced. In addition, the vibration of a long driveshaft during power transmission is more noticeable, further affecting the tractor's stability and operating comfort. This invention optimizes the layout of the driveshaft 7, thereby shortening its length. Specifically, one end of the driveshaft 7 is connected to the generator rotor, while the other end serves as the power output end. This design eliminates the need for the driveshaft 7 to pass through the generator 3, thus reducing unnecessary length. The shortened driveshaft length not only reduces material costs but also simplifies the design and manufacturing process, improving the strength and rigidity of the driveshaft 7 and reducing the risk of bending and breakage. Simultaneously, the shorter driveshaft 7 experiences less vibration during power transmission, further improving the tractor's stability and operating comfort, allowing the tractor to maintain good performance under various operating conditions.

[0059] Example 2:

[0060] Based on Example 1, and referring to Figure 1-3 The power motor 4 is equipped with a rotor shaft, and the gearbox 5 is equipped with a gear shaft.

[0061] The rotor shaft and the gear shaft are hollow shafts. The transmission shaft 7 passes through the hollow parts of the gear shaft and the rotor shaft and is connected to the rotor 301.

[0062] The rotor shaft and the gear shaft are technical terms used in this field and will not be explained further.

[0063] Furthermore, engine 1, the main power source of the tractor, is installed at the front of the tractor. A flywheel 101 is connected to the output end of engine 1. The main function of flywheel 101 is to store and release kinetic energy, enabling engine 1 to operate more smoothly. Flywheel 101 is connected to the output shaft of engine 1 via an interface, which uses a flange connection or keyway connection to ensure a secure connection between flywheel 101 and engine 1. Furthermore, flywheel 101 is a thick disc made of cast iron or steel, possessing a high moment of inertia, capable of providing stable power output even when engine 1's speed fluctuates.

[0064] Furthermore, generator 3 is mounted at the front of the tractor, located behind engine 1. The main function of generator 3 is to convert the mechanical energy of engine 1 into electrical energy for use by the tractor's electronic systems and other electrical equipment. Generator 3 internally includes rotor 301, a rotating component with magnets or windings that generates electrical energy through electromagnetic induction with the stator.

[0065] Furthermore, the gearbox 5 is a two-speed gearbox.

[0066] Furthermore, the shock absorber 2 is a torsional shock absorber.

[0067] Furthermore, the power output terminal 701 is connected to an agricultural implement, and the power output terminal 701 is configured to transmit power to the agricultural implement to drive the agricultural implement to operate.

[0068] Furthermore, the agricultural machinery mentioned is any one of harvesters, rotary tillers, seeders, fertilizer applicators, and planters.

[0069] This utility model's tractor transmission device can be flexibly connected to various types of agricultural implements, including harvesters, rotary tillers, seeders, fertilizer applicators, and planters. These implements perform different functions in agricultural operations, but all require efficient and stable power support from the tractor. Through the transmission device design of this utility model, the tractor can better meet the power needs of these different implements. For example, harvesters require greater power and higher stability during operation, and this utility model, through shock absorbers and an optimized connection structure, ensures smooth operation of the transmission system, reduces power loss, and thus provides more efficient and stable power support. Rotary tillers need to respond and adjust quickly under different soil conditions; this utility model's transmission system, by shortening the transmission path and reducing vibration, ensures the rotary tiller's immediate response and operational flexibility during operation. Seeders, fertilizer applicators, and planters have high requirements for the continuity and stability of power; this utility model's design effectively reduces interruptions and instability caused by engine vibration, improving the reliability and efficiency of these implements during operation. Therefore, this multi-functional connection design not only expands the tractor's applicability but also enhances its overall performance in various agricultural operations.

[0070] Furthermore, the transmission shaft 7 is made of stainless steel or alloy steel.

[0071] Furthermore, the surface of the drive shaft 7 is chrome-plated to improve its wear resistance and corrosion resistance.

[0072] Drive shafts operate frequently in agricultural work and are subjected to various mechanical stresses and environmental factors, such as friction from soil particles and erosion from moisture. To further improve the service life and performance of drive shafts, this invention employs chrome plating, forming a chrome coating on the surface of the drive shaft. Chrome plating offers excellent wear resistance and corrosion resistance, significantly reducing surface wear and extending the service life of the drive shaft. Furthermore, the chrome plating increases the smoothness of the drive shaft surface, reducing frictional resistance and improving power transmission efficiency. This surface treatment method is particularly effective in improving the durability of components under high-load, high-wear environments. Through chrome plating, drive shafts are not only more durable but also maintain a high performance level during prolonged operation, reducing downtime for maintenance and improving the overall operating efficiency of the tractor and user satisfaction.

[0073] Furthermore, the drive shaft 7 includes several detachable connecting sections, with adjacent connecting sections connected by splines or threads.

[0074] Traditional tractor driveshafts are typically designed as a single unit, requiring replacement of the entire shaft in case of failure, increasing maintenance costs and impacting operational efficiency. In this invention, the driveshaft is designed as several detachable connecting sections, with adjacent sections connected by splines or threads. These detachable sections greatly facilitate driveshaft maintenance; when a section fails or wears out, only that section needs replacement, eliminating the need for complete replacement and significantly reducing maintenance costs. Furthermore, this design allows for flexible adjustment of the driveshaft length to suit different implement installation positions and operating environments, improving the tractor's applicability and flexibility. In short, the detachable connecting section design not only enhances the reliability and maintenance convenience of the driveshaft but also optimizes the overall tractor user experience and reduces overall costs for the user.

[0075] Example 3:

[0076] This utility model provides a technical solution:

[0077] A tractor comprising the aforementioned tractor transmission.

[0078] This utility model proposes a tractor that adopts the aforementioned transmission device. This tractor, through optimized transmission device design, significantly improves the efficiency and reliability of power transmission, reducing many common problems in traditional designs, such as high vibration, high noise, and easy wear. Specifically, the use of shock absorbers effectively absorbs the vibration of the engine flywheel, extends the service life of the drive shaft, and improves engine stability; the generator shaft no longer requires a hollow structure, simplifying the design and reducing processing difficulty and cost; the shortened length of the drive shaft further reduces vibration and material costs; the material selection and surface treatment of the drive shaft improve its mechanical properties and corrosion resistance; and the detachable connection section design makes maintenance more convenient and reduces repair costs. These technological optimizations not only enhance the overall performance of the tractor but also improve the working environment for operators, increasing work efficiency and user satisfaction. Therefore, this new tractor not only has significant advantages in function and performance but also excels in economy and user experience, possessing broad market application prospects.

[0079] All devices selected in this application (parts whose specific structures are not described) are general standard parts or parts known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. Furthermore, all software programs involved in this application are prior art, and this application does not involve any improvements to the software programs.

[0080] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of this application. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

[0081] Similarly, it should be understood that, in order to simplify this application and aid in understanding one or more aspects of the application, various features of this application may sometimes be grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of this application. However, this approach should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, the point of application is that the corresponding technical problem can be solved with fewer features than all of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0082] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0083] It should be noted that the above embodiments are illustrative of this application and not limiting of it, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A tractor drive apparatus, characterized by, The tractor transmission device comprises an engine (1), a generator (3), a power motor (4), a gearbox (5), a rear axle box (6) and a transmission shaft (7), wherein: The engine (1), the generator (3), the power motor (4), the gearbox (5) and the rear axle box (6) are sequentially connected in a first direction; The engine (1) is connected with a flywheel (101), the generator (3) comprises a rotor (301), and the rotor (301) is connected with the flywheel (101) through a shock absorber (2); One end of the transmission shaft (7) is sequentially connected with the rotor (301) after passing through the rear axle box (6), the gearbox (5) and the power motor (4) in the first direction, and the other end of the transmission shaft (7) extends out of the rear axle box (6) to form a power output end (701).

2. The tractor transmission of claim 1, wherein, The power motor (4) is provided with a rotor shaft, and the gearbox (5) is provided with an axle gear shaft; The rotor shaft and the axle gear shaft are hollow shafts, and the transmission shaft (7) is connected with the rotor (301) after passing through the hollow parts of the rotor shaft and the axle gear shaft.

3. The tractor transmission of claim 1, wherein, The gearbox (5) is a two-gear gearbox.

4. The tractor transmission of claim 1, wherein, The shock absorber (2) is a torsional shock absorber.

5. The tractor transmission of claim 1, wherein, The power output end (701) is connected with an agricultural implement, and the power output end (701) is configured to transmit power to the agricultural implement to drive the agricultural implement to work.

6. The tractor transmission of claim 5, wherein, The agricultural implement is any one of a harvester, a rotary tiller, a seeder, a fertilizer applicator and a planter.

7. The tractor transmission of claim 1, wherein, The material of the transmission shaft (7) is stainless steel or alloy steel.

8. The tractor transmission of claim 1, wherein, The surface of the transmission shaft (7) is subjected to chrome plating treatment to improve the wear resistance and corrosion resistance of the transmission shaft (7).

9. The tractor transmission of claim 1, wherein, The transmission shaft (7) comprises a plurality of detachable connecting segments, and adjacent connecting segments are connected through splines or threads.

10. A tractor characterised in that: The tractor transmission device according to any one of claims 1-9.

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