PTO transmission structure and tractor

Abstract

The present application relates to a kind of PTO transmission structure and tractor.PTO transmission structure includes PTO clutch, input main shaft, rear PTO output shaft, rear PTO secondary output shaft and rear PTO idler, one end of input main shaft is connected PTO clutch, the other end coaxially is equipped with low gear driving gear, rear PTO secondary output shaft is arranged in the below of the other end of input main shaft in parallel, coaxially is equipped with low gear driven gear and rear PTO secondary driving gear on rear PTO secondary output shaft, low gear driving gear and low gear driven gear are engaged, rear PTO output shaft is arranged in the above of the other end of input main shaft in parallel, coaxially is equipped with rear PTO secondary driven gear on rear PTO output shaft, rear PTO idler is engaged with rear PTO secondary driven gear and rear PTO secondary driving gear respectively.Advantages: simple and reasonable structure design, can realize rear single-speed PTO power output, compared with traditional PTO transmission structure, change the position of power output shaft, meet the driving position requirement of machine.

Description

Technical Field

[0001] This invention relates to the field of PTO transmission technology, and particularly to a PTO transmission structure and a tractor. Background Technology

[0002] Power take-off (PTO) is generally arranged in a two-shaft configuration. This configuration results in the PTO shaft being lower than the input shaft. While this may meet the requirements for use on conventional tractors, on low-profile tractors, the excessively low PTO shaft may not meet the installation and usage requirements of agricultural implements.

[0003] Therefore, it is necessary to develop a new PTO transmission structure to overcome the problem of shaft head height, which is a difficult problem that multi-functional small tractors need to overcome. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a PTO transmission structure and a tractor, which effectively overcomes the defects of the prior art.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A PTO transmission structure includes a PTO clutch, an input main shaft, a rear PTO output shaft, a rear PTO secondary output shaft, and a rear PTO idler gear. One end of the input main shaft is connected to the PTO clutch, and the other end is coaxially provided with a low-gear drive gear. The rear PTO secondary output shaft is arranged parallel to and below the other end of the input main shaft. A low-gear driven gear and a rear PTO secondary drive gear are coaxially provided on the rear PTO secondary output shaft, and the low-gear drive gear and the low-gear driven gear mesh with each other. The rear PTO output shaft is arranged parallel to and above the other end of the input main shaft, and a rear PTO secondary driven gear is coaxially provided on the rear PTO output shaft. The rear PTO idler gear meshes with both the rear PTO secondary driven gear and the rear PTO secondary drive gear.

[0007] The beneficial effects are: the structural design is simple and reasonable, and it can realize rear-mounted single-speed PTO power output. Compared with the traditional PTO transmission structure, it changes the position of the power output shaft and meets the driving position requirements of the machine.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, a high-grade drive gear is coaxially provided on the aforementioned input spindle, and a high-grade driven gear is coaxially provided on the aforementioned rear PTO secondary output shaft, wherein the aforementioned high-grade drive gear and the aforementioned high-grade driven gear mesh with each other.

[0010] The beneficial effects of adopting the further technical solution are: it can realize rear dual-speed PTO power output, which changes the position of the power output shaft compared with the traditional PTO transmission structure, thus meeting the driving position requirements of the machine.

[0011] Furthermore, it also includes a central PTO output shaft, which is arranged parallel to the input spindle below. One end of the central PTO output shaft is located below the rear PTO secondary output shaft and is coaxially provided with a central PTO driven gear. The central PTO driven gear meshes with the low-gear driven gear. A central PTO engagement sleeve is slidably mounted on one end of the central PTO output shaft along the axial direction via a first spline. One end of the central PTO driven gear is provided with a cylindrical extension, and a second spline is provided on the extension. The central PTO engagement sleeve can be axially moved to engage or disengage with the second spline.

[0012] The beneficial effects of adopting the further technical solution are: it can integrate the mid-mounted PTO and the rear-mounted PTO, realizing the full integration of the mid-mounted PTO and the rear-mounted single-speed PTO, and through the transmission of the two-stage gear, the position of the output shaft of the rear-mounted PTO is greatly improved. Compared with the traditional PTO transmission structure, it improves the integration of the transmission route and the transmission efficiency. At the same time, it changes the position of the power output shaft to meet the driving position requirements of the machine.

[0013] Furthermore, the aforementioned centrally mounted PTO output shaft includes a first main shaft section and a first connecting shaft section. One end of the aforementioned centrally mounted PTO driven gear is equipped with the aforementioned centrally mounted PTO driven gear, and the other end of the aforementioned first connecting shaft section is coaxially connected to one end of the aforementioned first main shaft section via a coupling.

[0014] The beneficial effect of adopting a further technical solution is that the split design of the centrally located PTO output shaft facilitates long-distance power output.

[0015] Furthermore, one end of the aforementioned centrally located PTO output shaft is provided with a stepped section with an increased diameter, and the aforementioned first spline is provided on the stepped section, with the extension of the aforementioned centrally located PTO driven gear close to the stepped section.

[0016] The beneficial effect of adopting a further technical solution is that it facilitates the assembly and movement of the centrally located PTO driven gear.

[0017] Furthermore, the aforementioned input spindle is coaxially equipped with a high-grade drive gear, and the aforementioned rear PTO secondary output shaft is coaxially equipped with a high-grade driven gear, which meshes with the aforementioned high-grade drive gear; it also includes a central PTO output shaft, which is parallel to and below the aforementioned input spindle. One end of the central PTO output shaft is located below the aforementioned rear PTO secondary output shaft and is coaxially equipped with a central PTO driven gear, which meshes with the aforementioned low-grade driven gear. One end of the central PTO output shaft is axially slidably fitted with a central PTO engagement gear sleeve via a first spline. One end of the central PTO driven gear is provided with a cylindrical extension, and the extension is provided with a second spline. The central PTO engagement gear sleeve can be axially moved to engage or disengage with the aforementioned second spline.

[0018] The beneficial effects of adopting the further technical solution are: it can integrate the mid-mounted PTO and the rear-mounted PTO, realizing the full integration of the mid-mounted PTO and the rear-mounted dual-speed PTO, and through the transmission of the two-stage gear, the position of the output shaft of the rear-mounted PTO is greatly improved. Compared with the traditional PTO transmission structure, it improves the integration of the transmission route and the transmission efficiency. At the same time, it changes the position of the power output shaft to meet the drive position requirements of the machine.

[0019] Furthermore, one end of the aforementioned centrally located PTO output shaft is provided with a stepped section with an increased diameter, and the aforementioned first spline is provided on the stepped section, with the extension of the aforementioned centrally located PTO driven gear close to the stepped section.

[0020] The beneficial effect of adopting a further technical solution is that it facilitates the assembly and movement of the centrally located PTO driven gear.

[0021] Furthermore, the aforementioned input spindle includes a second spindle section and a second connecting section. One end of the second spindle section is connected to the aforementioned PTO clutch, and one end of the second connecting section is coaxially connected to the other end of the aforementioned spindle section via a coaxial coupling. The other end of the second connecting section constitutes the other end of the aforementioned input spindle.

[0022] The beneficial effect of adopting a further technical solution is that the split design of the input spindle facilitates long-distance power input. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of one embodiment of the PTO transmission structure of the present invention;

[0024] Figure 2 This is a schematic diagram of another embodiment of the PTO transmission structure of the present invention;

[0025] Figure 3 This is a schematic diagram of another embodiment of the PTO transmission structure of the present invention;

[0026] Figure 4 This is a schematic diagram of another embodiment of the PTO transmission structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the transmission connection between the rear PTO secondary driving gear, the rear PTO idler gear, and the rear PTO secondary driven gear in the PTO transmission structure of the present invention.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Centrally mounted PTO engagement gear sleeve; 2. Centrally mounted PTO driven gear; 3. Rear-mounted PTO secondary drive gear; 4. Rear-mounted PTO output shaft; 5. Rear-mounted PTO idler gear; 6. Rear-mounted PTO secondary driven gear; 7. High-gear drive gear; 8. High-gear driven gear; 9. Low-gear drive gear; 10. Low-gear driven gear; 11. Centrally mounted PTO output shaft; 12. PTO clutch; 13. Input spindle; 14. Rear-mounted PTO secondary output shaft; 11. Stage. Detailed Implementation

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, the PTO transmission structure of this embodiment includes a PTO clutch 12, an input main shaft 13, a rear PTO output shaft 4, a rear PTO secondary output shaft 14, and a rear PTO idler wheel 5. One end of the input main shaft 13 is connected to the PTO clutch 12, and the other end is coaxially provided with a low-gear drive gear 9. The rear PTO secondary output shaft 14 is arranged parallel to and below the other end of the input main shaft 13. A low-gear driven gear 10 and a rear PTO secondary drive gear 3 are coaxially provided on the rear PTO secondary output shaft 14, and the low-gear drive gear 9 and the low-gear driven gear 10 mesh with each other. The rear PTO output shaft 4 is arranged parallel to and above the other end of the input main shaft 13, and a rear PTO secondary driven gear 6 is coaxially provided on the rear PTO output shaft 4. The rear PTO idler wheel 5 meshes with the rear PTO secondary driven gear 6 and the rear PTO secondary drive gear 3 respectively (e.g., Figure 5 (As shown).

[0033] The transmission route in this embodiment is as follows:

[0034] Engine power - PTO clutch 12 - low-gear drive gear 9 - low-gear driven gear 10 - rear-mounted PTO secondary drive gear 3 - rear-mounted PTO idler gear 5 - rear-mounted PTO secondary driven gear 6 - rear-mounted PTO output shaft 4. The entire system achieves rear-mounted single-speed PTO power output. The entire transmission structure is simple and reasonable in design, enabling rear-mounted single-speed PTO power output. Compared to traditional PTO transmission structures, it changes the position of the power output shaft, meeting the drive position requirements of the implement.

[0035] Example 2

[0036] like Figure 2 As shown, the PTO transmission structure of this embodiment includes a PTO clutch 12, an input main shaft 13, a rear PTO output shaft 4, a rear PTO secondary output shaft 14, and a rear PTO idler gear 5. One end of the input main shaft 13 is connected to the PTO clutch 12, and the other end is coaxially provided with a low-gear drive gear 9. The rear PTO secondary output shaft 14 is arranged parallel to and below the other end of the input main shaft 13. The rear PTO secondary output shaft 14 is coaxially provided with a low-gear driven gear 10 and a rear PTO secondary drive gear 3. The low-gear drive gear 9... The rear PTO output shaft 4 is arranged parallel above the other end of the input main shaft 13 and meshes with the low-grade driven gear 10. The rear PTO output shaft 4 is coaxially provided with a rear PTO secondary driven gear 6. The rear PTO idler gear 5 meshes with the rear PTO secondary driven gear 6 and the rear PTO secondary driving gear 3 respectively. The input main shaft 13 is also coaxially provided with a high-grade driving gear 7, and the rear PTO secondary output shaft 14 is also coaxially provided with a high-grade driven gear 8. The high-grade driving gear 7 and the high-grade driven gear 8 mesh with each other.

[0037] The transmission route in this embodiment is as follows:

[0038] Engine power - PTO clutch 12 - High-speed drive gear 7 / Low-speed drive gear 9 - High-speed driven gear 8 / Low-speed driven gear 10 - Rear-mounted PTO secondary drive gear 3 - Rear-mounted PTO idler gear 5 - Rear-mounted PTO secondary driven gear 6 - Rear-mounted PTO output shaft 4. The entire transmission structure is simple and reasonable in design, enabling rear-mounted dual-speed PTO power output. Compared with the traditional PTO transmission structure, it changes the position of the power output shaft, meeting the drive position requirements of the implement.

[0039] Example 3

[0040] like Figure 3As shown, the PTO transmission structure of this embodiment includes a PTO clutch 12, an input main shaft 13, a rear PTO output shaft 4, a rear PTO secondary output shaft 14, and a rear PTO idler gear 5. One end of the input main shaft 13 is connected to the PTO clutch 12, and the other end is coaxially provided with a low-gear drive gear 9. The rear PTO secondary output shaft 14 is arranged parallel to and below the other end of the input main shaft 13. A low-gear driven gear 10 and a rear PTO secondary drive gear 3 are coaxially provided on the rear PTO secondary output shaft 14. The low-gear drive gear 9 and the low-gear driven gear 10 mesh with each other. The rear PTO output shaft 4 is arranged parallel to and above the other end of the input main shaft 13. A rear PTO secondary driven gear 6 is coaxially provided on the rear PTO output shaft 4. The TO idler gear 5 meshes with the rear PTO secondary driven gear 6 and the rear PTO secondary driving gear 3 respectively; it also includes a central PTO output shaft 11, which is arranged parallel to the input main shaft 13 below. One end of the central PTO output shaft 11 is located below the rear PTO secondary output shaft 14 and is coaxially provided with a central PTO driven gear 2. The central PTO driven gear 2 meshes with the low-gear driven gear 10. One end of the central PTO output shaft 11 is slidably mounted with a central PTO engagement sleeve 1 via a first spline along the axial direction. One end of the central PTO driven gear 2 is provided with a cylindrical extension, and a second spline is provided on the extension. The central PTO engagement sleeve 1 can be axially moved to engage or disengage with the second spline.

[0041] The transmission route in this embodiment is as follows:

[0042] The power transmission system consists of two paths: one is a rear-mounted PTO drive route: engine power - PTO clutch 12 - low-gear drive gear 9 - low-gear driven gear 10 - rear-mounted PTO secondary drive gear 3 - rear-mounted PTO idler gear 5 - rear-mounted PTO secondary driven gear 6 - rear-mounted PTO output shaft 4; the other is a mid-mounted PTO drive route: engine power - PTO clutch 12 - low-gear drive gear 9 - low-gear driven gear 10 - mid-mounted PTO driven gear 2 - mid-mounted PTO output shaft 11. This power transmission structure is rationally designed, integrating the mid-mounted and rear-mounted PTOs, achieving comprehensive integration of the mid-mounted and rear-mounted single-speed PTOs. Furthermore, through the transmission of the secondary gears, the position of the rear-mounted PTO output shaft is significantly raised. Compared to traditional PTO transmission structures, this improves the integration and transmission efficiency of the transmission route. Simultaneously, by changing the position of the power output shaft, it meets the drive position requirements of the implement.

[0043] Based on the above embodiment, the centrally located PTO output shaft 11 includes a first main shaft section and a first connecting shaft section. One end of the first connecting shaft section is equipped with the centrally located PTO driven gear 2, and the other end of the first connecting shaft section is coaxially connected to one end of the first main shaft section via a coupling. The centrally located PTO output shaft 11 adopts a segmented structure, which facilitates long-distance power output.

[0044] Ideally, one end of the aforementioned centrally located PTO output shaft 11 is provided with a stepped platform 111 with an increased diameter. The aforementioned first spline is provided on the stepped platform 111, and the extension of the aforementioned centrally located PTO driven gear 2 is close to the stepped platform 111. This structure facilitates the assembly and sliding of the centrally located PTO engaging gear sleeve 1. The circumferential diameters of the outer contours of the first spline and the second spline are connected, enabling smooth sliding of the centrally located PTO engaging gear sleeve 1.

[0045] Example 4

[0046] like Figure 4 As shown, the PTO transmission structure of this embodiment includes a PTO clutch 12, an input main shaft 13, a rear PTO output shaft 4, a rear PTO secondary output shaft 14, and a rear PTO idler wheel 5. One end of the input main shaft 13 is connected to the PTO clutch 12, and the other end is coaxially provided with a low-gear drive gear 9. The rear PTO secondary output shaft 14 is arranged parallel to and below the other end of the input main shaft 13. A low-gear driven gear 10 and a rear PTO secondary drive gear 3 are coaxially provided on the rear PTO secondary output shaft 14, and the low-gear drive gear 9 and the low-gear driven gear 10 mesh with each other. The rear PTO output shaft 4 is arranged parallel to and above the other end of the input main shaft 13, and a rear PTO secondary driven gear 6 is coaxially provided on the rear PTO output shaft 4. The rear PTO idler wheel 5 meshes with the rear PTO secondary driven gear 6 and the rear PTO secondary drive gear 3, respectively. The input spindle 13 is coaxially provided with a high-grade drive gear 7, and the rear PTO secondary output shaft 14 is coaxially provided with a high-grade driven gear 8. The high-grade drive gear 7 and the high-grade driven gear 8 mesh with each other. The system also includes a central PTO output shaft 11, which is parallel to the input spindle 13 and located below it. One end of the central PTO output shaft 11 is located below the rear PTO secondary output shaft 14 and is coaxially provided with a central PTO driven gear 2. The central PTO driven gear 2 meshes with the low-grade driven gear 10. One end of the central PTO output shaft 11 is slidably fitted with a central PTO engagement sleeve 1 via a first spline. One end of the central PTO driven gear 2 is provided with a cylindrical extension, and a second spline is provided on the extension. The central PTO engagement sleeve 1 can be axially moved to engage or disengage with the second spline.

[0047] The transmission route in this embodiment is as follows:

[0048] The power transmission system consists of two paths: one is a rear-mounted PTO drive route: engine power - PTO clutch 12 - high-gear drive gear 7 / low-gear drive gear 9 - high-gear driven gear 8 / low-gear driven gear 10 - rear-mounted PTO secondary drive gear 3 - rear-mounted PTO idler gear 5 - rear-mounted PTO secondary driven gear 6 - rear-mounted PTO output shaft 4; the other is a mid-mounted PTO drive route: engine power - PTO clutch 12 - low-gear drive gear 9 - low-gear driven gear 10 - mid-mounted PTO driven gear 2 - mid-mounted PTO output shaft 11. This power transmission structure is rationally designed, integrating the mid-mounted and rear-mounted PTOs, achieving comprehensive integration of the mid-mounted and rear-mounted dual-speed PTOs. Furthermore, through the transmission of the secondary gears, the position of the rear-mounted PTO output shaft is significantly raised. Compared to traditional PTO transmission structures, this improves the integration and transmission efficiency of the drive route. Simultaneously, by changing the position of the power output shaft, it meets the drive position requirements of the implement.

[0049] Ideally, one end of the aforementioned centrally located PTO output shaft 11 is provided with a stepped platform 111 with an increased diameter. The aforementioned first spline is provided on the stepped platform 111, and the extension of the aforementioned centrally located PTO driven gear 2 is close to the stepped platform 111. This structure facilitates the assembly and sliding of the centrally located PTO engaging gear sleeve 1. The circumferential diameters of the outer contours of the first spline and the second spline are connected, enabling smooth sliding of the centrally located PTO engaging gear sleeve 1.

[0050] Based on embodiments 1 to 4 above, the input spindle 13 includes a second spindle section and a second connecting section. One end of the second spindle section is connected to the PTO clutch 12, and one end of the second connecting section is coaxially connected to the other end of the spindle section via a coaxial coupling. The other end of the second connecting section constitutes the other end of the input spindle 13. The segmented design of the input spindle 13 enables long-distance power input.

[0051] It is particularly important to emphasize that: Figures 1 to 4 In the diagram, the rear PTO idler gear 5 is shown in its unfolded form. Therefore, it is not shown meshing with the rear PTO secondary drive gear 3. For details on the meshing relationship between the rear PTO idler gear 5, the rear PTO secondary driven gear 6, and the rear PTO secondary drive gear 3, please refer to [link to diagram]. Figure 5 .

[0052] Example 5

[0053] This embodiment provides a tractor, including the PTO transmission structure described in Embodiments 1 to 4.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] 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.

[0059] 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 PTO transmission structure, characterized in that: The system includes a PTO clutch (12), an input spindle (13), a rear PTO output shaft (4), a rear PTO secondary output shaft (14), and a rear PTO idler gear (5). One end of the input spindle (13) is connected to the PTO clutch (12), and the other end is coaxially provided with a low-gear drive gear (9). The rear PTO secondary output shaft (14) is arranged parallel to and below the other end of the input spindle (13). The rear PTO secondary output shaft (14) is coaxially provided with a low-gear idler gear (5). The driving gear (10) and the rear PTO secondary driving gear (3) are meshed, the low-gear driving gear (9) and the low-gear driven gear (10) are meshed, the rear PTO output shaft (4) is arranged parallel above the other end of the input main shaft (13), the rear PTO output shaft (4) is coaxially provided with the rear PTO secondary driven gear (6), the rear PTO idler gear (5) meshes with the rear PTO secondary driven gear (6) and the rear PTO secondary driving gear (3) respectively; The input spindle (13) is also coaxially provided with a high-grade drive gear (7), and the rear PTO secondary output shaft (14) is also coaxially provided with a high-grade driven gear (8). The high-grade drive gear (7) and the high-grade driven gear (8) mesh with each other. The system also includes a central PTO output shaft (11), which is arranged parallel to the input spindle (13) below it. One end of the central PTO output shaft (11) is located at the rear PTO secondary output shaft (14). Below, and coaxially provided, is a central PTO driven gear (2), which meshes with the low-gear driven gear (10). One end of the central PTO output shaft (11) is slidably fitted with a central PTO engagement sleeve (1) via a first spline. One end of the central PTO driven gear (2) is provided with a cylindrical extension, on which a second spline is provided. The central PTO engagement sleeve (1) can be axially moved to engage or disengage with the second spline.

2. The PTO transmission structure according to claim 1, characterized in that: One end of the central PTO output shaft (11) is provided with a stepped platform (111) with an increased diameter, and the first spline is provided on the stepped platform (111). The extension of the central PTO driven gear (2) is close to the stepped platform (111).

3. A PTO transmission structure according to any one of claims 1 to 2, characterized in that: The input spindle (13) includes a second spindle section and a second connecting section. One end of the second spindle section is connected to the PTO clutch (12). One end of the second connecting section is coaxially connected to the other end of the spindle section via a coaxial coupling. The other end of the second connecting section constitutes the other end of the input spindle (13).

4. A tractor, characterized in that: Includes the PTO transmission structure as described in any one of claims 1 to 3.

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