A two-piece on-off transfer case and an agricultural machine

Abstract

The present application relates to a kind of clutchable two-body type transfer case and agricultural machinery, it relates to transmission field, clutchable two-body type transfer case input shaft rotatable installation in gear box, one end of intermediate shaft assembly is located in gear box and is connected with input shaft transmission, the other end is located in bevel gear box, bevel gear output shaft is perpendicular to intermediate shaft assembly and is connected with its transmission, gear box has multiple installation sites, bevel gear box can rotate around the axis of intermediate shaft assembly and is connected with one of installation sites.Agricultural machinery includes the transfer case described in the application.The beneficial effects of the present application are: gear box and bevel gear box are two detachable structures, which can be maintained separately;Two boxes can be added lubricating oil without affecting each other, so that the lubrication of parts is more sufficient;Input shaft and bevel gear output shaft realize the conversion of input and output in vertical direction;The installation angle of bevel gear box can be replaced to adjust the output angle, which can be more flexible and adapt to the adjustment requirements of the transmission angle of rear drive axle.

Description

Technical Field

[0001] This invention relates to the field of transmission devices, specifically to a two-piece detachable transfer case and agricultural machinery. Background Technology

[0002] Currently, most corn and wheat harvesting machinery is front-wheel drive. In harsh environments such as muddy conditions, it often suffers from insufficient power and cannot operate normally. Some models connect the driveshaft and rear drive axle via a transfer case, increasing the vehicle's power through four-wheel drive, which effectively solves this problem. However, this leads to issues such as excessively high engine speeds and a high failure rate of the driveshaft universal joint during high-speed driving. Therefore, for agricultural machinery, there is a need to design a transmission system that can switch between two-wheel drive and four-wheel drive.

[0003] Furthermore, the required output angle and rotation direction of the transfer case output shaft vary for different models of agricultural machinery, resulting in poor versatility of the transfer case and the need to design different models of transfer cases, which leads to high design costs. Summary of the Invention

[0004] The technical problem to be solved by this invention is how to improve the versatility of the transfer case.

[0005] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A two-piece separable transfer case, comprising a gearbox, a bevel gearbox, an input shaft, an intermediate shaft assembly, and a bevel gear output shaft.

[0006] The input shaft is rotatably mounted inside the gearbox. The intermediate shaft assembly is parallel to the input shaft, with one end located inside the gearbox and drivingly connected to the input shaft, and the other end located inside the bevel gearbox. The bevel gear output shaft is rotatably mounted inside the bevel gearbox, perpendicular to the intermediate shaft assembly and drivingly connected to it.

[0007] The gearbox has multiple mounting points, and the bevel gearbox is rotatable about the axis of the intermediate shaft assembly and connected to one of the mounting points.

[0008] The beneficial effects of this invention are: the gearbox and the bevel gearbox are two detachable structures that can be disassembled and maintained separately; lubricating oil can be added to the two housings separately without affecting each other, so that the lubrication of the parts is more sufficient; the input shaft and the bevel gear output shaft realize the conversion of the vertical direction of input and output; by setting multiple mounting points and changing the mounting angle of the bevel gearbox, the output angle can be adjusted, which is more flexible and adaptable to the needs of rear drive axle transmission angle adjustment.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, it also includes an active bevel gear and a passive bevel gear, the passive bevel gear being fixedly connected to the output shaft of the bevel gear, the intermediate shaft assembly having two bevel gear mounting parts, the two bevel gear mounting parts being located on both sides of the passive bevel gear respectively, and the active bevel gear being fixedly connected to one of the bevel gear mounting parts.

[0011] The beneficial effects of adopting the above-mentioned further scheme are: through the transmission of the active bevel gear and the passive bevel gear, the vertical direction of the input and output can be realized, and the output rotation direction of the bevel gear output shaft can be adjusted by changing the installation position of the active bevel gear.

[0012] Furthermore, it also includes a gearbox output gear, an output gear bearing, a clutch sleeve, and a clutch fork. The gearbox output gear is sleeved on one end of the intermediate shaft assembly via the output gear bearing. The input shaft is connected to the gearbox output gear in a transmission connection. The gearbox output gear has an output gear spline. The clutch sleeve is splinedly connected to the intermediate shaft assembly. The clutch fork engages with the clutch sleeve and, through its own movement or rotation, causes the clutch sleeve to move along the axis of the intermediate shaft assembly to disengage from or engage with the output gear spline.

[0013] The advantages of adopting the above-mentioned further solution are: it allows for flexible selection of whether to transmit torque through the bevel gear output shaft, enabling switching between two-wheel drive and four-wheel drive. During high-speed driving or normal road conditions, the clutch shift fork disengages the clutch sleeve from the output gear spline, cutting off the rear drive axle transmission and effectively reducing the failure rate of the rear drive axle drive shaft. In situations requiring uphill driving, rough terrain, or other conditions necessitating four-wheel drive, the clutch shift fork engages the clutch sleeve with the output gear spline, and power is output to the rear drive axle through the bevel gear output shaft.

[0014] Furthermore, it also includes a shift fork shaft and a shift fork rocker arm. One end of the shift fork shaft is fixedly connected to the shift fork rocker arm, and the other end passes through the gearbox and is connected to the clutch shift fork. The shift fork rocker arm drives the clutch shift fork to move or rotate through the shift fork shaft.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the movement of the clutch shift fork is controlled by driving the shift fork shaft through the shift fork rocker arm.

[0016] Furthermore, the intermediate shaft assembly includes a gearbox output shaft and a bevel gear input shaft. The gearbox output shaft is rotatably mounted inside the gearbox and is driven by the input shaft. The bevel gear input shaft is coaxially arranged with the gearbox output shaft and splined. The bevel gear input shaft is rotatably mounted inside the bevel gearbox and is driven by the bevel gear output shaft.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the intermediate shaft assembly is connected by a gearbox output shaft and a bevel gear input shaft.

[0018] Furthermore, it also includes a connecting plate, one end of which is fixedly connected to the bevel gearbox, and the other end of which is connected to one of the mounting points.

[0019] The advantages of adopting the above-mentioned further solution are: setting up a connecting plate, and after removing the connecting plate, it is convenient to maintain the inside of the bevel gearbox, and to install the gearbox output shaft and the bevel gear input shaft.

[0020] Furthermore, it also includes a first gear, an input gear fixed on the input shaft, the first gear being rotatably mounted inside the gearbox, and the input gear being driven by the intermediate shaft assembly through the first gear.

[0021] The beneficial effect of adopting the above-mentioned further solution is that the transmission ratio can be adjusted by the number of teeth on the first gear. When the distance between the input shaft and the intermediate shaft assembly axis is large, compared with the case without the first gear, this solution uses the first gear for transition, so a smaller diameter input gear can be used to achieve transmission.

[0022] Furthermore, it also includes a second gear, which is rotatably mounted inside the gearbox, and the input gear, the first gear, the second gear and the intermediate shaft assembly mesh and transmit power in sequence.

[0023] Furthermore, it also includes a third gear, which is rotatably mounted inside the gearbox, and the input gear, the first gear, the second gear, the third gear and the intermediate shaft assembly mesh and transmit power in sequence.

[0024] The advantages of adopting the above-mentioned further scheme are: the transmission ratio can be adjusted by changing the number of teeth on the first, second, and third gears. When the distance between the input shaft and the intermediate shaft assembly is large, the arrangement is compact, small-diameter gears can be used, and the gears have high strength.

[0025] The present invention also provides an agricultural machine, including a rear drive axle and a clutchable two-piece transfer case, wherein the bevel gear output shaft is connected to the rear drive axle for transmission. Attached Figure Description

[0026] Figure 1 This is a top view of the detachable two-piece transfer case of the present invention;

[0027] Figure 2 This is a cross-sectional view of the detachable two-piece transfer case of the present invention;

[0028] Figure 3 This is a rear view of the detachable two-piece transfer case of the present invention;

[0029] Figure 4 This is a transmission structure diagram of the present invention, in which the active bevel gear is installed in one of the bevel gear mounting parts;

[0030] Figure 5 This is a transmission structure diagram of the present invention, in which the active bevel gear is mounted on another bevel gear mounting part.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Bevel gearbox; 2. Connecting disc; 3. Gearbox; 4. Input shaft; 5. Input gear; 6. First gear; 7. Second gear; 8. Third gear; 9. Gearbox output gear; 10. Shift fork shaft; 11. Clutch shift fork; 12. Shift fork rocker arm; 13. Bevel gear output shaft; 14. Driven bevel gear; 15. Gearbox output shaft; 16. Output gear bearing; 17. Clutch sleeve; 18. Bevel gear input shaft; 19. Driving bevel gear; 20. Bevel gear mounting part. Detailed Implementation

[0033] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0034] like Figures 1-5 As shown, the present invention provides a two-piece disengaged transfer case, including a gearbox 3, a bevel gearbox 1, an input shaft 4, an intermediate shaft assembly, and a bevel gear output shaft 13.

[0035] The input shaft 4 is rotatably mounted inside the gearbox 3. The intermediate shaft assembly is parallel to the input shaft 4. One end of the intermediate shaft assembly is located inside the gearbox 3 and is drive-connected to the input shaft 4, while the other end is located inside the bevel gearbox 1. The bevel gear output shaft 13 is rotatably mounted inside the bevel gearbox 1. The bevel gear output shaft 13 is perpendicular to the intermediate shaft assembly and is drive-connected to it.

[0036] The gearbox 3 has multiple mounting points, and the bevel gearbox 1 is rotatable about the axis of the intermediate shaft assembly and connected to one of the mounting points.

[0037] Gearbox 3 and bevel gearbox 1 are two detachable structures that can be disassembled and maintained separately; lubricating oil can be added to each gearbox separately without affecting each other, so as to ensure more thorough lubrication of the parts; input shaft 4 and bevel gear output shaft 13 realize the conversion of input and output vertical direction; by setting multiple mounting points and changing the mounting angle of bevel gearbox 1, the output angle can be adjusted, which can be more flexible and adaptable to the needs of rear drive axle transmission angle adjustment.

[0038] Specifically, one end of the input shaft 4 is used for power input, and the other end is installed in the gearbox 3. The input shaft 4 transmits power to the intermediate shaft assembly, which drives one end of the bevel gear output shaft 13. The other end of the bevel gear output shaft 13 is used to connect with the transmission components of the gearbox 3, thereby outputting power.

[0039] The mounting points specifically refer to: multiple bolt holes arranged on the circumference of the gearbox 3 around the axis of the intermediate shaft assembly, and the bevel gearbox 1 rotating around the axis of the intermediate shaft assembly, such as... Figure 3 The rotation of the bevel gearbox 1 allows the bevel gear output shaft 13 to be adjusted within the angular range indicated by the arrow. After the bevel gear output shaft 13 is adjusted to the desired position, at least three bevel gearbox mounting holes on the bevel gearbox 1 are aligned with at least three bolt holes on the gearbox 3 and connected by bolts. The at least three bolt holes used for connection in this position are called the first mounting points. After the bevel gearbox 1 is rotated to another position, the bolt holes used for connection are called the second mounting points, and so on.

[0040] There are multiple mounting points, and the bolt holes at these mounting points may or may not overlap completely. For example, on the circumference coaxial with the intermediate shaft assembly, the bevel gearbox 1 has six bevel gearbox mounting holes evenly distributed circumferentially. The following scenarios are possible: 1. Six bolt holes are evenly distributed circumferentially on the gearbox 3. Each bevel gearbox mounting hole can rotate 60° to connect with an adjacent bolt hole, thus the minimum adjustment angle of the bevel gearbox 1 is 60°. 2. Multiple bolt holes are evenly distributed circumferentially on the gearbox 3, with the number of bolt holes being more than twice the number of bevel gearbox mounting holes, such as 12 or 18 bolt holes, with six bolt holes forming a group. The six bevel gearbox mounting holes can connect with one of these groups of bolt holes, thereby achieving a smaller adjustment angle.

[0041] Based on any of the above schemes, it also includes an active bevel gear 19 and a passive bevel gear 14. The passive bevel gear 14 is fixedly connected to the bevel gear output shaft 13. The intermediate shaft assembly has two bevel gear mounting parts 20, which are located on both sides of the passive bevel gear 14. The active bevel gear 19 is fixedly connected to one of the bevel gear mounting parts 20.

[0042] The input and output directions are vertically driven by the active bevel gear 19 and the passive bevel gear 14. At the same time, the output rotation direction of the bevel gear output shaft 13 can be adjusted by changing the installation position of the active bevel gear 19.

[0043] Specifically, such as Figure 4 and Figure 5As shown, the bevel gear mounting section 20 is a splined connection segment on the intermediate shaft assembly, and the driving bevel gear 19 is splinedly connected to the splined connection segment. After the driving bevel gear 19 is mounted at two different positions on the intermediate shaft assembly, it transmits power from both sides of the driven bevel gear 14, thereby changing the rotation direction of the bevel gear output shaft 13 while keeping the rotation direction of the intermediate shaft assembly unchanged, meeting the transmission requirements of different vehicle models. Optionally, the bevel gear mounting section 20 can also be another type of keyed connection segment, such as a flat key connection segment, with the driving bevel gear 19 connected to the flat key connection segment via a flat key.

[0044] Based on any of the above schemes, it also includes a gearbox output gear 9, an output gear bearing 16, a clutch sleeve 17, and a clutch fork 11. The gearbox output gear 9 is sleeved on one end of the intermediate shaft assembly via the output gear bearing 16. The input shaft 4 is connected to the gearbox output gear 9 in a transmission connection. The gearbox output gear 9 has an output gear spline. The clutch sleeve 17 is splinedly connected to the intermediate shaft assembly. The clutch fork 11 engages with the clutch sleeve 17 and moves along the axis of the intermediate shaft assembly to disengage from or engage with the output gear spline through its own movement or rotation.

[0045] The clutch fork 11 allows for flexible selection of whether to transmit torque via the bevel gear output shaft 13, enabling switching between two-wheel drive and four-wheel drive. During high-speed driving or normal road conditions, the clutch sleeve 17 disengages from the output gear spline, cutting off the rear drive axle transmission and effectively reducing the failure rate of the rear drive axle drive shaft. When climbing hills, navigating rough terrain, or other situations requiring four-wheel drive, the clutch sleeve 11 engages with the output gear spline. In this case, the clutch sleeve 17 simultaneously engages with both the output gear spline and the spline on the intermediate shaft assembly, and power is output to the rear drive axle via the bevel gear output shaft 13.

[0046] Based on any of the above solutions, it also includes a shift fork shaft 10 and a shift fork rocker arm 12. One end of the shift fork shaft 10 is fixedly connected to the shift fork rocker arm 12, and the other end passes into the gearbox 3 and is connected to the clutch shift fork 11. The shift fork rocker arm 12 drives the clutch shift fork 11 to move or rotate through the shift fork shaft 10.

[0047] The clutch shift fork 11 is moved by the shift fork rocker arm 12 driving the shift fork shaft 10.

[0048] Regarding the transmission relationship between the clutch fork 11, the fork shaft 10, and the fork rocker arm 12, at least the following implementation methods exist:

[0049] Implementation method one: such as Figure 1 and Figure 4As shown, the shift fork shaft 10 is perpendicular to the intermediate shaft assembly. The shift fork shaft 10 extends rotatably into the gearbox 3 through a bearing and is fixedly connected to the clutch shift fork 11. The shift fork rocker arm 12 causes the shift fork shaft 10 to rotate around the axis of the shift fork shaft 10. The shift fork shaft 10 drives the clutch shift fork 11 to swing around the axis of the shift fork shaft 10, thereby pushing and pulling the clutch sleeve 17.

[0050] Implementation Method 2: The shift fork shaft 10 and the intermediate shaft assembly are parallel. The shift fork shaft 10 extends rotatably into the gearbox 3 via a bearing. The surface of the shift fork shaft 10 has an annular guide groove arranged around its circumference. The guide groove protrudes or recesses along the axial direction of the shift fork shaft 10 to form a wave shape. The clutch shift fork 11 is rotatably sleeved on the outside of the shift fork shaft 10, and a guide pin is fixed on the clutch shift fork 11. The guide pin extends into the guide groove of the shift fork shaft 10. The shift fork rocker arm 12 causes the shift fork shaft 10 to rotate around its axis. When the shift fork shaft 10 rotates, the guide pin moves along the trajectory of the guide groove, realizing the reciprocating movement of the guide pin along the axis of the shift fork shaft 10, which in turn pushes the clutch sleeve 17 to reciprocate along the axis of the shift fork shaft 10.

[0051] Implementation method 3: The shift fork shaft 10 and the intermediate shaft assembly are parallel. The shift fork shaft 10 is slidably connected to the gearbox 3. The shift fork rocker arm 12 enables the shift fork shaft 10 to reciprocate along its own axis, thereby pushing and pulling the clutch sleeve 17.

[0052] Based on any of the above schemes, the intermediate shaft assembly includes a gearbox output shaft 15 and a bevel gear input shaft 18. The gearbox output shaft 15 is rotatably mounted in the gearbox 3 and is connected to the input shaft 4 in a driving manner. The bevel gear input shaft 18 is coaxially arranged with the gearbox output shaft 15 and splined. The bevel gear input shaft 18 is rotatably mounted in the bevel gearbox 1 and is connected to the bevel gear output shaft 13 in a driving manner.

[0053] The intermediate shaft assembly is connected by a gearbox output shaft 15 and a bevel gear input shaft 18.

[0054] Specifically, the gearbox output gear 9, output gear bearing 16, and clutch sleeve 17 are mounted on the gearbox output shaft 15, and the bevel gear mounting part 20 is located on the bevel gear input shaft 18.

[0055] Based on any of the above solutions, a connecting plate 2 is also included, one end of which is fixedly connected to the bevel gear box 1, and the other end is connected to one of the mounting points.

[0056] The connecting plate 2 is installed so that, after being removed, it facilitates maintenance of the inside of the bevel gearbox 1 and the installation of the gearbox output shaft 15 and the bevel gear input shaft 18. The connecting plate 2 is ring-shaped and fits around the outside of the intermediate shaft assembly.

[0057] Based on any of the above solutions, a first gear 6 is also included. An input gear 5 is fixed on the input shaft 4. The first gear 6 is rotatably mounted in the gearbox 3. The input gear 5 is driven by the intermediate shaft assembly through the first gear 6.

[0058] The transmission ratio can be adjusted by the number of teeth on the first gear 6. When the distance between the input shaft 4 and the axis of the intermediate shaft assembly is large, compared to the case without the first gear 6, this solution uses the first gear 6 as a transition, so the input gear 5 with a smaller diameter can be used to achieve transmission.

[0059] Based on any of the above schemes, a second gear 7 is also included, which is rotatably mounted in the gearbox 3, and the input gear 5, the first gear 6, the second gear 7 and the intermediate shaft assembly mesh and transmit power in sequence.

[0060] Based on any of the above schemes, a third gear 8 is also included, which is rotatably mounted in the gearbox 3, and the input gear 5, the first gear 6, the second gear 7, the third gear 8 and the intermediate shaft assembly mesh and transmit power in sequence.

[0061] The transmission ratio can be adjusted by changing the number of teeth on the first gear 6, the second gear 7, and the third gear 8. When the distance between the input shaft 4 and the axis of the intermediate shaft assembly is large, the arrangement is compact, and small-diameter gears can be used, resulting in high gear strength.

[0062] like Figures 1-5 As shown, in one specific embodiment, when the clutch sleeve 17 is separated from the gearbox output gear 9, the transmission route is as follows: the input shaft 4 inputs power, the first gear 6, the second gear 7, the third gear 8 and the gearbox output gear 9 mesh and transmit power in sequence. Since the gearbox output gear 9 is sleeved outside the output gear bearing 16, it rotates freely relative to the gearbox output shaft 15. The gearbox output shaft 15 does not rotate, and the power transmission is disconnected. At this time, it is a two-wheel drive mode, and the vehicle only outputs power to the front drive axle.

[0063] When the clutch sleeve 17 meshes with the gearbox output gear 9, the transmission route is as follows: the input shaft 4 inputs power, the first gear 6, the second gear 7, the third gear 8 and the gearbox output gear 9 mesh and transmit power in sequence, the clutch sleeve 17 is simultaneously splined connected to the gearbox output gear 9 and the gearbox output shaft 15, the gearbox output shaft 15 rotates to transmit power, the driving bevel gear 19 meshes with the driven bevel gear 14 to transmit power, driving the bevel gear output shaft 13 to rotate.

[0064] The present invention also provides an agricultural machine, including a rear drive axle and a clutchable two-piece transfer case, wherein the bevel gear output shaft 13 is connected to the rear drive axle for transmission.

[0065] Specifically, the gearbox of the agricultural machinery is connected to the input shaft 4, thereby inputting power into the transfer case. The gearbox is also connected to the front drive axle.

[0066] The clutchable two-piece transfer case described in this invention can also be used in other vehicles, such as construction machinery and transport vehicles.

[0067] In the description of this invention, it should be noted that the terms "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A two-piece detachable transfer case, characterized in that, Includes a gearbox (3), a bevel gearbox (1), an input shaft (4), an intermediate shaft assembly, a bevel gear output shaft (13), a driving bevel gear (19), a driven bevel gear (14), a gearbox output gear (9), an output gear bearing (16), a clutch sleeve (17), and a clutch shift fork (11). The input shaft (4) is rotatably mounted inside the gearbox (3). The intermediate shaft assembly is parallel to the input shaft (4). One end of the intermediate shaft assembly is located inside the gearbox (3) and is connected to the input shaft (4) in a driving manner. The other end is located inside the bevel gearbox (1). The bevel gear output shaft (13) is rotatably mounted inside the bevel gearbox (1). The bevel gear output shaft (13) is perpendicular to the intermediate shaft assembly and is connected to it in a driving manner. The gearbox (3) has multiple mounting points, and the bevel gearbox (1) is rotatable about the axis of the intermediate shaft assembly and connected to one of the mounting points; The passive bevel gear (14) is fixedly connected to the bevel gear output shaft (13), the intermediate shaft assembly has two bevel gear mounting parts (20), the two bevel gear mounting parts (20) are respectively located on both sides of the passive bevel gear (14), and the active bevel gear (19) is fixedly connected to one of the bevel gear mounting parts (20). The gearbox output gear (9) is sleeved on one end of the intermediate shaft assembly via the output gear bearing (16). The input shaft (4) is connected to the gearbox output gear (9) in a transmission manner. The gearbox output gear (9) has an output gear spline. The clutch sleeve (17) is splinedly connected to the intermediate shaft assembly. The clutch fork (11) engages with the clutch sleeve (17) and moves along the axis of the intermediate shaft assembly to separate from or engage with the output gear spline through its own movement or rotation.

2. The detachable two-piece transfer case according to claim 1, characterized in that, It also includes a shift fork shaft (10) and a shift fork rocker arm (12). One end of the shift fork shaft (10) is fixedly connected to the shift fork rocker arm (12), and the other end passes into the gearbox (3) and is connected to the clutch shift fork (11). The shift fork rocker arm (12) drives the clutch shift fork (11) to move or rotate through the shift fork shaft (10).

3. A two-piece detachable transfer case according to claim 1, characterized in that, The intermediate shaft assembly includes a gearbox output shaft (15) and a bevel gear input shaft (18). The gearbox output shaft (15) is rotatably mounted in the gearbox (3) and is connected to the input shaft (4) in a driving manner. The bevel gear input shaft (18) is coaxially arranged with the gearbox output shaft (15) and splined. The bevel gear input shaft (18) is rotatably mounted in the bevel gearbox (1) and is connected to the bevel gear output shaft (13) in a driving manner.

4. A detachable two-piece transfer case according to claim 1, characterized in that, It also includes a connecting plate (2), one end of which is fixedly connected to the bevel gearbox (1), and the other end is connected to one of the mounting points.

5. A detachable two-piece transfer case according to any one of claims 1-4, characterized in that, It also includes a first gear (6), an input gear (5) fixed on the input shaft (4), the first gear (6) is rotatably mounted in the gearbox (3), and the input gear (5) is driven by the intermediate shaft assembly through the first gear (6).

6. A detachable two-piece transfer case according to claim 5, characterized in that, It also includes a second gear (7), which is rotatably mounted in the gearbox (3), and the input gear (5), the first gear (6), the second gear (7) and the intermediate shaft assembly mesh and drive in sequence.

7. A detachable two-piece transfer case according to claim 6, characterized in that, It also includes a third gear (8), which is rotatably mounted in the gearbox (3), and the input gear (5), the first gear (6), the second gear (7), the third gear (8) and the intermediate shaft assembly mesh and transmit power in sequence.

8. An agricultural machine, characterized in that, It includes a rear drive axle and a two-piece clutch transfer case as described in any one of claims 1-7, wherein the bevel gear output shaft (13) is connected to the rear drive axle in a transmission connection.

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