Tractor gearbox

Abstract

The utility model relates to the technical field of power transmission devices, in particular to a tractor gearbox which comprises a gearbox shell, an input shaft, a first output shaft, a second output shaft, a third output shaft, a fourth output shaft, a first clutch and a second clutch, and the input shaft, the first output shaft, the second output shaft, the third output shaft, the fourth output shaft, the first clutch and the second clutch are rotatably arranged on the gearbox shell. The fourth output shaft is sleeved with the second clutch, the first output shaft is provided with an outer spline corresponding to the first clutch, and the fourth output shaft is provided with an outer spline corresponding to the second clutch. An inner spline matched with the outer spline of the first output shaft is arranged on the inner side of the first clutch, an inner spline matched with the outer spline of the fourth output shaft is arranged on the inner side of the second clutch, the first clutch and the second clutch are selectively meshed with the outer splines of the first output shaft and the fourth output shaft through the inner splines respectively, and a plurality of power transmission paths can be formed. Therefore, various different output speed ratio combinations are obtained so as to adapt to the cooperative use of the tractor and various agricultural implements.

Description

Technical Field

[0001] This utility model relates to the field of power transmission device technology, specifically a tractor gearbox. Background Technology

[0002] In modern agricultural production, tractors, as the core power source, significantly improve agricultural production efficiency through coordinated operation with agricultural implements such as seeders and harvesters. The tractor gearbox, as a key transmission component, directly affects the operational effectiveness of the entire agricultural machinery system. Located between the engine and the implements, the tractor gearbox uses a precise gear transmission system to achieve adjustable conversion of the output and input shaft transmission ratios, thereby flexibly adjusting the engine's output speed and torque to meet the diverse power requirements of different implements during operation. However, current tractor gearboxes still have significant shortcomings in practical applications: on the one hand, their limited output speed ratio combinations restrict the compatibility of tractors with various implements; on the other hand, redundant structural design leads to a less compact overall layout and poor stability under operating conditions. These problems, to some extent, limit the working efficiency and applicability of the agricultural machinery system. Utility Model Content

[0003] The purpose of this invention is to provide a tractor gearbox to overcome the problems existing in the current equipment.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tractor gearbox, comprising a gearbox housing, an input shaft, an output shaft one, an output shaft two, an output shaft three, an output shaft four, a clutch one, and a clutch two rotatably mounted on the gearbox housing. The clutch one is mounted on the output shaft one, and the clutch two is mounted on the output shaft four. An input transmission gear is provided on the input shaft, and a clutch transmission gear one is provided on the clutch one, which meshes with the input transmission gear. The output shaft two is provided with an output transmission gear one and an output transmission gear two, the output shaft three is provided with an output transmission gear three, and the clutch two is provided with a clutch transmission gear two. The output transmission gear one meshes with the input transmission gear and the output transmission gear three, and the output transmission gear two meshes with the clutch transmission gear two. The output shaft one is provided with an external spline corresponding to the clutch one, and the output shaft four is provided with an external spline corresponding to the clutch two. The inner side of the clutch one is provided with an internal spline that mates with the external spline of the output shaft one, and the inner side of the clutch two is provided with an internal spline that mates with the external spline of the output shaft four.

[0005] Based on the above technical solution, the present invention can be further improved as follows:

[0006] As a further improvement to the above technical solution, a first bearing is provided between the inner side of the clutch and the output shaft.

[0007] As a further improvement to the above technical solution, the third output shaft and the fourth output shaft are arranged on the same axis.

[0008] As a further improvement to the above technical solution, the second clutch is mounted on the third and fourth output shafts.

[0009] As a further improvement to the above technical solution, one end of the output shaft four is located inside the gearbox housing and is provided with a spline sleeve, and the outer peripheral surface of the spline sleeve is provided with the external spline; one end of the output shaft three extends into the inner side of the spline sleeve.

[0010] As a further improvement to the above technical solution, a second bearing is provided between the inner side of the spline sleeve and the third output shaft, and a third bearing is provided between the inner side of the second clutch and the third output shaft, so that the second clutch and the spline sleeve can rotate around the third output shaft.

[0011] As a further improvement to the above technical solution, the input shaft is located at the top of the gearbox housing, and output shaft one and output shaft two are located below the input shaft. The axis of the input shaft is not on the same plane as the axes of output shaft one and output shaft two, and the distance between the axes of output shaft one and output shaft two is less than the sum of the distances between the input shaft and the axes of output shaft one and output shaft two.

[0012] As a further improvement to the above technical solution, the input shaft, output shaft one, output shaft two, output shaft three and output shaft four are connected to the side wall of the gearbox housing through bearings.

[0013] The beneficial effects of this utility model are:

[0014] 1. Clutch one and clutch two selectively engage with the external splines of output shaft one and output shaft four respectively through internal splines, which can form multiple power transmission paths, thereby obtaining a variety of different output speed ratio combinations to adapt to the use of tractors with various agricultural implements;

[0015] 2. The spatial arrangement of the input shaft, output shaft one, and output shaft two ensures that the distance between the axes of output shaft one and output shaft two is less than the sum of the distances between the input shaft and the axes of output shaft one and output shaft two, making the tractor gearbox structure more compact.

[0016] 3. A first bearing is provided between clutch one and output shaft one, and a third bearing is provided between clutch two and output shaft three, so that clutch one and clutch two rotate more smoothly, which is conducive to stable operation of the tractor gearbox under working conditions. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of a tractor gearbox provided in a preferred embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A side view of the tractor gearbox;

[0020] Figure 3 yes Figure 1 A diagram showing the internal structure of a tractor gearbox;

[0021] In the diagram: 1. Gearbox housing; 2. Input shaft; 21. Input transmission gear; 3. Output shaft one; 4. Output shaft two; 41. Output transmission gear one; 42. Output transmission gear two; 5. Output shaft three; 51. Output transmission gear three; 6. Output shaft four; 61. Spline sleeve; 62. Second bearing; 7. Clutch one; 71. Clutch transmission gear one; 72. First bearing; 8. Clutch two; 81. Clutch transmission gear two; 82. Third bearing. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., 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. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, a preferred embodiment of the present invention provides a tractor gearbox, including a gearbox housing 1, an input shaft 2, an output shaft 3, an output shaft 4, an output shaft 5, an output shaft 6, a clutch 7, and a clutch 8 rotatably mounted on the gearbox housing 1. The clutch 7 is sleeved on the output shaft 3, the output shaft 5 and the output shaft 6 are coaxially aligned, and the clutch 8 is sleeved on the output shaft 5 and the output shaft 6. The input shaft 2, output shaft 3, output shaft 4, output shaft 5, and output shaft 6 are all connected to the side wall of the gearbox housing 1 via bearings.

[0026] Input shaft 2 is used for inputting power. One end of input shaft 2 is connected to the tractor's engine, and input transmission gear 21 is provided on input shaft 2. Clutch transmission gear 71 is fixedly provided on the outer circumference of clutch 7, and clutch transmission gear 71 meshes with input transmission gear 21.

[0027] Output shaft 2 4 is provided with output transmission gear 1 41 and output transmission gear 2 42, output shaft 3 5 is provided with output transmission gear 3 51, clutch 2 8 is fixedly provided with clutch transmission gear 2 81 on the outer circumference surface, output transmission gear 1 41 meshes with input transmission gear 21 and output transmission gear 3 51, and output transmission gear 2 42 meshes with clutch transmission gear 2 81.

[0028] Output shaft 3 has an external spline corresponding to clutch 7, and output shaft 6 has an external spline corresponding to clutch 8. Clutch 7 has an internal spline on its inner side that mates with the external spline of output shaft 3, and clutch 8 has an internal spline on its inner side that mates with the external spline of output shaft 6.

[0029] When the internal spline of clutch 7 disengages from the external spline of output shaft 3, clutch 7 rotates freely around output shaft 3, while output shaft 3 does not rotate. When the internal spline of clutch 7 engages with the external spline of output shaft 3, clutch 7's rotation drives output shaft 3 to rotate, and clutch 7 and output shaft 3 rotate synchronously. When the internal spline of clutch 8 disengages from the external spline of output shaft 6, clutch 8 rotates freely around output shaft 6, while output shaft 6 does not rotate. When the internal spline of clutch 8 engages with the external spline of output shaft 6, clutch 8's rotation drives output shaft 6 to rotate, and clutch 8 and output shaft 6 rotate synchronously.

[0030] Preferably, a first bearing 72 is provided between the inner side of clutch 7 and output shaft 3 to make the rotation of clutch 7 smoother; one end of output shaft 6 is located inside the gearbox housing 1 and is provided with a spline sleeve 61, the outer circumferential surface of spline sleeve 61 is provided with the external spline; one end of output shaft 5 extends into the inner side of spline sleeve 61, a second bearing 62 is provided between the inner side of spline sleeve 61 and output shaft 5, and a third bearing 82 is provided between the inner side of clutch 8 and output shaft 5, so that clutch 8 and spline sleeve 61 can rotate around output shaft 5, making the rotation of clutch 8 and output shaft 6 smoother.

[0031] Specifically, the input shaft 2 is located at the top of the gearbox housing 1, and the output shaft 3 and the output shaft 4 are located below the input shaft 2. The axis of the input shaft 2 is not on the same plane as the axis of the output shaft 3 and the output shaft 4. The distance between the axes of the output shaft 3 and the output shaft 4 is less than the sum of the distances between the input shaft 2 and the axes of the output shaft 3 and the output shaft 4, making the tractor gearbox structure more compact.

[0032] In use, the input shaft 2 of the tractor gearbox is connected to the output shaft of the tractor engine. When the internal spline of clutch 1 7 is separated from the external spline of output shaft 1 3, and the internal spline of clutch 2 8 is separated from the external spline of output shaft 4 6, power is transmitted from the input shaft 2 to the output shaft 2 4 through input transmission gear 21 and output transmission gear 1 41, resulting in an output speed ratio combination. One end of output shaft 2 4 serves as the first hydraulic output, used to connect to the hydraulic drive mechanism. The power transmission path is: input shaft 2, input transmission gear 21, output transmission gear 1 41, output shaft 2 4. Power can also be transmitted from the input shaft 2 to the output shaft 3 5 through input transmission gear 21, output transmission gear 1 41, and output transmission gear 3 51, also resulting in an output speed ratio combination. The other end of output shaft 3 5, away from output shaft 4 6, serves as the second hydraulic output, used to connect to the hydraulic drive mechanism. The power transmission path is: input shaft 2, input transmission gear 21, output transmission gear 1 41, output transmission gear 3 51, output shaft 3 5.

[0033] When the internal spline of clutch 7 engages with the external spline of output shaft 3, power is transmitted from input shaft 2 to output shaft 3 through input transmission gear 21, clutch transmission gear 71, and clutch 7, thus obtaining an output speed ratio combination. One end of output shaft 3 serves as the first transmission shaft output, used to connect to the mechanical transmission mechanism; the other end of output shaft 3 serves as the third hydraulic output, used to connect to the hydraulic drive mechanism. The power transmission path is: input shaft 2, input transmission gear 21, clutch transmission gear 71, clutch 7, output shaft 3.

[0034] When the internal spline of clutch 28 engages with the external spline of output shaft 46, power is transmitted from input shaft 2 through input transmission gear 21, output transmission gear 1 41, output shaft 2 4, output transmission gear 2 42, clutch transmission gear 2 81, and clutch 2 8 to output shaft 46, thus obtaining an output speed ratio combination. Output shaft 46 rotates at different speeds than output shaft 3 5. The other end of output shaft 46, away from output shaft 3 5, extends out of gearbox housing 1 as a second transmission shaft output, used to connect the mechanical transmission mechanism. The power transmission path is: input shaft 2, input transmission gear 21, output transmission gear 1 41, output shaft 2 4, output transmission gear 2 42, clutch transmission gear 2 81, clutch 2 8, output shaft 4 6.

[0035] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0036] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A tractor gearbox characterised in that: The gearbox comprises a gearbox housing, an input shaft rotatably arranged on the gearbox housing, an output shaft one, an output shaft two, an output shaft three, an output shaft four, a clutch one and a clutch two, the clutch one is sleeved on the output shaft one, the clutch two is sleeved on the output shaft four, the input shaft is provided with an input transmission gear, the clutch one is provided with a clutch transmission gear one, the clutch transmission gear one is engaged with the input transmission gear; the output shaft two is provided with an output transmission gear one and an output transmission gear two, the output shaft three is provided with an output transmission gear three, the clutch two is provided with a clutch transmission gear two, the output transmission gear one is engaged with the input transmission gear and the output transmission gear three, the output transmission gear two is engaged with the clutch transmission gear two; the output shaft one is provided with an external spline corresponding to the clutch one, the output shaft four is provided with an external spline corresponding to the clutch two; the clutch one is provided with an internal spline on the inner side, the internal spline is matched with the external spline of the output shaft one, the clutch two is provided with an internal spline on the inner side, the internal spline is matched with the external spline of the output shaft four.

2. The tractor gearbox of claim 1, wherein: The first bearing is arranged between the inner side of the clutch one and the output shaft one.

3. The tractor gearbox of claim 2, wherein: The output shaft three and the output shaft four are coaxially arranged.

4. The tractor gearbox of claim 3, wherein: The clutch two is sleeved on the output shaft three and the output shaft four.

5. The tractor gearbox of claim 4, wherein: One end of the output shaft four is located inside the gearbox housing and is provided with a spline sleeve, the outer periphery of the spline sleeve is provided with the external spline; one end of the output shaft three extends into the inside of the spline sleeve.

6. The tractor gearbox of claim 5, wherein: The second bearing is arranged between the inside of the spline sleeve and the output shaft three, the third bearing is arranged between the inside of the clutch two and the output shaft three, the clutch two and the spline sleeve can rotate around the output shaft three.

7. The tractor gearbox of claim 1, wherein: The input shaft is located at the top of the gearbox housing, the output shaft one and the output shaft two are arranged below the input shaft, the axis of the input shaft is not in the same plane as the axes of the output shaft one and the output shaft two, the distance between the axes of the output shaft one and the output shaft two is less than the sum of the distances between the axes of the input shaft and the output shaft one and the output shaft two.

8. The tractor gearbox of claim 1, wherein: The input shaft, the output shaft one, the output shaft two, the output shaft three and the output shaft four are connected to the side wall of the gearbox housing through bearings.

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