High-integration agricultural machinery gearbox

Abstract

A high-integration agricultural machinery gearbox relates to the technical field of agricultural machinery transmissions, and by improving a clutch mechanism, the occupied area of the existing clutch mechanism is reduced, the integration degree of transmission parts in a gearbox body is improved, and the overall size of the gearbox is reduced. Comprising a box body, an input shaft, a transmission shaft and an output shaft are rotationally connected in the box body, and a sliding shaft sleeve and an input duplex gear are arranged on the input shaft; a transmission duplex gear and a transmission shaft sleeve are arranged on the transmission shaft; a gear of the sliding shaft sleeve is meshed with a first tooth of the transmission duplex gear, a second tooth of the transmission duplex gear is meshed with the input duplex gear, and a second tooth of the input duplex gear is meshed with the transmission shaft sleeve; a tooth-shaped groove is formed in the inner hole side of the side, facing the sliding shaft sleeve, of the first input tooth. A clutch hole is formed in one end of the transmission shaft, and a mounting hole is formed in the outer side of the transmission shaft and communicated with the clutch hole. A clutch pin is arranged in the clutch hole and provided with a conical clutch section, and a clutch ball is arranged in the mounting hole.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery transmissions, and in particular to a highly integrated agricultural machinery transmission. Background Art

[0002] For most agricultural machinery, the gearbox is one of its core components; and the structure of the gearbox includes the main shaft, main shaft gear, intermediate shaft, intermediate shaft gear, output shaft and output shaft gear, etc. The main function of the gearbox is to convert the engine speed into the speed required by the rotary tiller through gear transmission. In actual rotary tillage, the speed and power required by the rotary tiller are different, based on which the rotary tiller usually has multiple gears.

[0003] In order to better switch gears, it is mostly achieved through the cooperation of a clutch mechanism and a shift mechanism, wherein the existing clutch mechanism includes a clutch plate, a clutch cover, a clutch spring, etc.; its function is to control the travel speed of the rotary tiller through the traction of the clutch plate when operating the clutch lever, or to make different gear trains cooperate to achieve variable speed output through the shift fork of the shift mechanism.

[0004] However, the clutch mechanism of the existing gearbox has a complex structure and many components, which is not convenient for maintenance and the overall miniaturization of the gearbox structure; the shift mechanism directly drives the rotating gear to engage with the matching gear through the shift fork, which causes greater wear; therefore, how to miniaturize the gearbox and reduce the wear of the shift fork in the shift mechanism has become an urgent problem to be solved. Summary of the invention

[0005] 1. Technical Problems Solved

[0006] In view of the deficiencies of the prior art, the present invention proposes a highly integrated agricultural machinery gearbox, which reduces the space occupied by the existing clutch mechanism through improvements on the clutch mechanism, improves the integration of transmission components in the gearbox case, and reduces the overall volume of the gearbox.

[0007] 2. Specific technical solutions

[0008] A highly integrated agricultural machinery gearbox comprises a housing, wherein an input shaft, a transmission shaft and an output shaft are rotatably connected in the housing, the input shaft comprises a spline section and a smooth shaft section, the spline section is provided with a sliding sleeve; the smooth shaft section is sleeved with an input duplex tooth; the transmission shaft is sleeved with a transmission duplex tooth and a transmission sleeve; the gear of the sliding sleeve is meshed with a transmission first tooth of the transmission duplex tooth, the transmission second tooth of the transmission duplex tooth is meshed with an input first tooth of the input duplex tooth, the input second tooth of the input duplex tooth is meshed with a gear tooth of the transmission sleeve; the output A toothed groove is provided on the inner hole side of the first tooth facing the sliding sleeve, and the toothed groove cooperates with the gear of the sliding sleeve; a clutch hole is axially opened in the middle of one end of the transmission shaft, and a plurality of radially arranged mounting holes are provided on the outer side of the transmission shaft, and the mounting holes are connected with the clutch hole; a clutch pin is provided in the clutch hole, and a conical clutch section is provided at one end of the clutch pin close to the bottom of the clutch hole, and a clutch ball is provided in the mounting hole, and when the clutch section moves axially along the clutch hole, it drives the clutch ball to connect and separate with the inner wall of the transmission sleeve.

[0009] Implementation principle and working principle:

[0010] The transmission path of this scheme is that the power output of the engine is transmitted to the input shaft, the input shaft transmits the power to the transmission double-linked gear input first tooth of the transmission shaft through the spline section and the transmission sleeve, the transmission double-linked gear input second tooth and then outputs the power to the input double-linked gear, the input second tooth of the input double-linked gear transmits the power to the transmission sleeve, when power transmission is required, the clutch pin drives the clutch ball to combine the transmission sleeve, the clutch ball and the transmission shaft, wherein the advance and retreat of the clutch pin can effectively drive the transmission shaft, and then output the power to the output shaft through the transmission shaft, when it is in another gear, it is only necessary to match the toothed groove with the gear of the sliding sleeve;

[0011] The advantage of this solution is that the power output of the gearbox only needs to be achieved through the cooperation between the input shaft, the transmission shaft and the output shaft. The number of shafts is smaller, and the power output between the shafts is specifically achieved through the cooperation between the input double teeth and the transmission double teeth, which is more conducive to the miniaturization of the box. Unlike the prior art, the clutch pin of this solution is directly installed in the mounting hole of the transmission shaft, without the need for additional components such as shift forks, which further improves the integration of the gearbox. The clutch structure specifically adopts a steel ball extrusion combination. When encountering excessive force, the clutch pin and the transmission sleeve slip to avoid impact damage and have a longer service life.

[0012] Preferably, a bevel gear is provided at the other end of the transmission shaft, and a bevel gear matching the bevel gear is provided at the corresponding end of the output shaft; an input sleeve is also sleeved at the end of the spline section of the input shaft; the beneficial effect of this preferred embodiment is that the power transmission between the output shaft and the input shaft is carried out through the bevel gear, which can further help to improve the integration or miniaturization of the gearbox.

[0013] Preferably, an annular mounting groove is provided on the sliding sleeve; a shift assembly is provided on the housing, and the shift assembly includes a mounting rod, which is rotatably connected to the gearbox housing; a shift arm is provided at one end of the mounting rod on the outside of the gearbox housing, and the other end of the mounting rod is rotatably connected to a toggle wheel; the toggle wheel is provided in the annular mounting groove and can drive the sliding sleeve to move axially along the input shaft; the beneficial effect of this preferred embodiment is that when actually shifting gears, the rotation of the shift arm drives the toggle wheel at the other end of the mounting rod to abut against the sliding sleeve, thereby pushing the sliding sleeve, and when the toggle wheel contacts the sliding sleeve, the rotation of the sliding sleeve will drive the toggle wheel to rotate, thereby effectively reducing the wear of the sliding sleeve and the toggle wheel, and effectively extending the service life of the shift mechanism.

[0014] Preferably, the shift assembly also includes a rod sleeve, which is fixedly arranged on the box body, the mounting rod is rotatably connected in the rod sleeve, a sealing ring is also arranged between the mounting rod and the rod sleeve, and an oil seal is arranged at one end of the rod sleeve close to the shift arm; the beneficial effect of this preferred embodiment is that, through the arrangement of the sealing ring and the oil seal, while ensuring the smooth rotation of the mounting rod, it also ensures that the shift assembly has excellent sealing and dustproof properties.

[0015] Preferably, a plurality of limit grooves are arranged on one side of the inner wall of the sliding sleeve; a receiving hole is arranged on the input shaft, a limit spring is arranged in the receiving hole, a limit ball is arranged at the free end of the limit spring, and the limit ball cooperates with the limit groove; the beneficial effect of this preferred embodiment is that when the sliding sleeve slides on the spline section of the input shaft, the limit ball is pushed down until it is above the limit ball in the limit groove, and the limit ball will enter the limit groove under the elastic force of the spring, thereby ensuring the effectiveness of shifting gears.

[0016] Preferably, the clutch pin is also sleeved with a return spring on one side of the bottom of the clutch hole; the housing is also provided with a clutch operating assembly, the clutch operating assembly includes an end cover, and the clutch pin is rotatably connected to a side of the end cover close to the transmission shaft; the beneficial effect of this preferred embodiment is that the setting of the return spring will squeeze the spring when the clutch pin moves toward the bottom of the mounting hole, and when the clutch pin is reset, the return spring will provide thrust for the clutch pin, making the reset of the clutch pin stronger; through the setting of the end cover, the clutch pin can be easily rotated synchronously when the transmission shaft rotates, and the clutch setting can be achieved by only moving the end cover, which is simple and convenient.

[0017] Preferably, the transmission sleeve includes a mating section, which is located on the outside of the clutch hole, and a receiving groove is provided on one side of the inner wall of the mating section, and the receiving groove cooperates with the clutch ball; the beneficial effect of this preferred embodiment is that, through the setting of the receiving groove on the mating section, the contact area between the clutch ball and the transmission sleeve can be made larger, thereby effectively improving its stability when combined with the transmission power, and at the same time will not affect the rotation of the transmission sleeve.

[0018] Preferably, the accommodating groove is an arc-shaped groove, and the two sides of the groove bottom of the accommodating groove are respectively a smooth section and a limit section, the arc length of the smooth section projected onto the mating section is greater than the arc length of the limit section projected onto the mating section, and the smooth section of the accommodating groove and the limit section of the adjacent accommodating groove are similar; the smooth section and the limit section are distributed along the rotation direction of the transmission shaft; the beneficial effect of this preferred embodiment is that, through the setting of the smooth section, it is convenient for the clutch ball to smoothly enter the accommodating groove, and the arc length corresponding to the limit section is shorter, so the limit section can well play the role of limiting the clutch ball, preventing the clutch ball from moving in the arc-shaped groove and slipping.

[0019] Preferably, the outer surface of the transmission shaft is provided with an annular groove, and the annular groove is arranged around the mounting hole; the beneficial effect of this preference is that when the clutch ball is pushed to contact the transmission sleeve, it will also contact and squeeze the edge of the mounting hole, and burrs will occur in this squeezing. When burrs appear, the burrs are located in the annular groove and will not protrude from the outer surface of the transmission shaft, thereby not affecting the rotation of the transmission sleeve on the transmission shaft.

[0020] The beneficial effects of this scheme are:

[0021] 1. The main output of the variable gearbox consists of only two parallel shafts and one shaft connected by helical gears. The power transmission between the parallel shafts is achieved through the cooperation of multiple double gears, which is more conducive to the miniaturization of the overall structure of the gearbox.

[0022] 2. The clutch structure of this solution is very different from the prior art. In this solution, the clutch pin is located in the center hole of the transmission shaft, which is more conducive to improving the integration of the gearbox; the clutch pin is driven to move in the clutch hole by the end cover, which is simple and convenient.

[0023] 3. In this solution, when the toggle wheel contacts the sliding sleeve, the rotation of the sliding sleeve will drive the toggle wheel to rotate, thereby effectively reducing the wear of the sliding sleeve and the toggle wheel, and effectively extending the service life of the shift mechanism.

[0024] 4. The layout and structural setting of the receiving groove on the inner side of the transmission sleeve of this scheme can effectively improve the transmission stability. In addition, the setting of the annular groove makes the clutch effect more stable, and can effectively avoid slipping, and can also avoid the influence of the generated burrs on the rotation of the transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall assembly of the highly integrated agricultural machinery gearbox of the present invention.

[0026] Figure 2 It is the transmission structure assembly diagram of the highly integrated agricultural machinery gearbox of the present invention.

[0027] Figure 3 It is a cross-sectional schematic diagram of the transmission structure of the highly integrated agricultural machinery gearbox of the present invention.

[0028] Figure 4 It is a schematic diagram of the input shaft of the integrated agricultural machinery gearbox of the present invention.

[0029] Figure 5 It is a cross-sectional schematic diagram of the integrated agricultural machinery gearbox transmission shaft of the present invention.

[0030] Figure 6 It is a schematic diagram of the structure of the clutch operating assembly of the integrated agricultural machinery gearbox of the present invention.

[0031] Figure 7 It is a structural schematic diagram of the integrated agricultural machinery transmission shift mechanism of the present invention.

[0032] Figure 8 It is a schematic structural diagram of the sliding sleeve of the integrated agricultural machinery gearbox of the present invention.

[0033] Fig. 9 It is a schematic structural diagram of the integrated agricultural machinery gearbox transmission sleeve of the present invention.

[0034] Fig.10 It is a side view of the transmission sleeve of the integrated agricultural machinery gearbox of the present invention.

[0035] Fig.11 It is a front view of the integrated agricultural machinery gearbox transmission shaft of the present invention.

[0036] Description of reference numerals:

[0037] Box body 1, input shaft 2, spline section 201, optical shaft section 202, sliding sleeve 203, input duplex tooth 204, input first tooth 205, input second tooth 206, toothed groove 207, annular mounting groove 208, limit groove 209, receiving hole 210, limit spring 211, limit ball 212, transmission shaft 3, transmission duplex tooth 301, transmission sleeve 302, transmission first tooth 303, transmission second tooth 304, clutch hole 305, mounting hole 306, clutch pin 307, clutch section 308, clutch ball 309, bevel gear 310, return spring 311, matching section 312, accommodating groove 313, smooth section 314, limit section 315, output shaft 4, bevel gear 401, shift assembly 5, mounting rod 501, shift arm 502, toggle wheel 503, rod sleeve 504, sealing ring 505, oil seal 506. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more explicit definition of the protection scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1-11 As shown:

[0040] A highly integrated agricultural machinery gearbox reduces the footprint of the existing clutch mechanism by improving the clutch mechanism, improves the integration of transmission components in the gearbox housing, and reduces the overall size of the gearbox; Figure 1-3 As shown, it includes a housing 1, in which an input shaft 2, a transmission shaft 3 and an output shaft 4 are rotatably connected through bearings; Figure 4 The left side of the input shaft 2 is the spline section 201, and the right side is the optical shaft section 202. Figure 2 The spline segment 201 is connected with a sliding sleeve 203 through a spline; the optical axis segment 202 is connected with an input duplex tooth 204 through a bearing; the transmission duplex tooth 301 and the transmission sleeve 302 are sleeved on the transmission shaft 3; specifically, Figure 3 The gear of the sliding sleeve 203 meshes with the transmission first tooth 303 of the transmission duplex tooth 301, the transmission second tooth 304 of the transmission duplex tooth 301 meshes with the input first tooth 205 of the input duplex tooth 204, and the input second tooth 206 of the input duplex tooth 204 meshes with the gear teeth of the transmission sleeve 302; specifically, as Figure 3 , the inner hole on the left side of the first input tooth 205 is provided with a toothed groove 207, wherein the toothed groove 207 matches with the gear of the sliding sleeve 203;

[0041] When implementing, Figure 3 and Figure 5 A clutch hole 305 is axially provided in the middle of the right end of the transmission shaft 3, and a plurality of radially arranged mounting holes 306 are processed on the outer surface of the transmission shaft, wherein the mounting hole 306 is connected to the clutch hole 305; Figure 3 and 6 A clutch pin 307 is provided in the clutch hole 305, a conical clutch section 308 is provided on the left side of the clutch pin 307, and a clutch ball 309 is provided in the mounting hole 306. When the clutch section 308 moves along the left side of the clutch hole 305, the clutch section 308 drives the clutch ball 309 to move upward, and fits the clutch ball 309, the clutch section 308 and the transmission shaft sleeve 302 with the side wall of the mounting hole 306 to achieve a combined transmission effect. When the clutch section 308 moves to the right, the clutch ball 309 is disengaged from the transmission shaft sleeve 302, and the power transmission is cancelled.

[0042] The transmission path of this scheme is as follows:

[0043] 1. When the gear of the sliding sleeve 203 is meshed with the first transmission tooth 303 of the transmission duplex tooth 301, it is a low speed gear; the specific transmission path is as follows:

[0044] The power output of the engine is directly transmitted to the input shaft 1 through the input sleeve 200;

[0045] The input shaft 1 transmits power to the transmission shaft 3 through the transmission sleeve 203 matched with the spline section 201;

[0046] The input first tooth 303 of the idling transmission duplex tooth 301 on the transmission shaft 3 receives the power, and then outputs the power to the input duplex tooth 204 through the input second tooth 304 of the transmission duplex tooth 301;

[0047] The input second teeth 206 of the input duplex teeth 204 directly transmit power to the transmission sleeve 302;

[0048] When power transmission is required, the clutch pin 307 drives the clutch ball 309 to combine the sliding sleeve 203, the clutch ball 309 and the transmission shaft 3. When the clutch section 308 moves along the left side of the clutch hole 305, the clutch section 308 drives the clutch ball 309 to move upward, and fits the clutch ball 309, the clutch section 308 and the side wall of the transmission sleeve 302 and the mounting hole 306, so as to achieve the effect of combined transmission. When power is not required, when the clutch section 308 moves to the right, the clutch ball 309 is disengaged from the transmission sleeve 302, and the power transmission is cancelled.

[0049] 2. When in high-speed gear, it is only necessary to match the toothed groove 207 with the gear of the transmission sleeve 302; the power transmission path at this time is: the sliding sleeve 203 transmits power to the input duplex tooth 204 through the toothed groove 207. The power is transmitted to the gear of the transmission sleeve 302 through the input second tooth 304 of the input duplex tooth 204 to achieve high-speed output; the clutch control is the same as the low-speed gear.

[0050] When implementing it, Figure 3 In order to improve the integration of the gearbox, a bevel gear 310 is provided at the left end of the transmission shaft 3, and a bevel gear 401 matching the bevel gear 310 is provided at the upper end of the output shaft 4; and an input sleeve 200 is sleeved on the left end of the spline section 201 of the input shaft 200, wherein the input sleeve 200 is directly connected to the power source (engine); power transmission between the output shaft 4 and the transmission shaft 3 is performed through the bevel gear 310, which can further help to improve the integration or miniaturization of the gearbox.

[0051] When implementing it, Figure 3 , 7 and Figure 8 The movement of the sliding sleeve 203 is achieved by the shift assembly 5. Specifically, the middle part of the shift assembly 5 is a mounting rod 501, and a rod sleeve 504 is sleeved on the outer side of the mounting rod 501, wherein the rod sleeve 504 is welded or directly clamped on the gearbox housing 1, and the mounting rod 501 is rotatably connected in the rod sleeve 504; a shift arm 502 is provided at one end of the mounting rod 501 on the outer side of the gearbox housing 1, wherein a toggle wheel 503 is rotatably connected to the other end of the mounting rod 501, and in specific implementation, the toggle wheel 503 is specifically a bearing or a wheel sleeved on the bearing; in specific implementation, an annular mounting groove 208 is opened on the sliding sleeve 203, and the toggle wheel 503 is located in the annular mounting groove 208, and can be specifically clamped in the annular mounting groove 208. When shifting gears, the rotation of the shift arm 502 drives the toggle wheel 503 at the other end of the mounting rod 501 to abut against the sliding sleeve 203. When the toggle wheel 503 pushes the sliding sleeve 203 to move left and right along the input shaft, the rotation of the sliding sleeve 203 drives the toggle wheel 503 to rotate, thereby effectively reducing the wear of the sliding sleeve 203 and the toggle wheel 503, and effectively extending the service life of the shift mechanism. During implementation, a sealing ring 505 is further provided between the mounting rod 501 and the rod sleeve 504, and an oil seal 506 is provided on the right side of the rod sleeve 504. Through the provision of the sealing ring 505 and the oil seal 506, while ensuring the smooth rotation of the mounting rod 501, it also ensures that the shift assembly has excellent sealing and dustproof properties.

[0052] During implementation, the sliding sleeve 203 needs to be positioned and limited when shifting gears. Specifically, Figure 4 and Figure 8, two limiting grooves 209 are arranged on one side of the inner wall of the sliding sleeve 203; a receiving hole 210 is arranged on the input shaft 2, a limiting spring 211 is arranged in the receiving hole 210, and a limiting ball 212 is fixedly connected to the free end of the limiting spring 211; wherein the limiting ball 212 cooperates with the limiting groove 209; the specific implementation process is as follows, in the initial state, the limiting ball 212 protrudes from the outer surface of the input shaft 2, when the sliding sleeve 203 slides on the spline section 210 of the input shaft 2, The limiting ball 212 is squeezed into the accommodating hole 210 until the limiting groove 209 is located above the limiting ball 212. The squeezing of the limiting ball 212 fails, and then the limiting ball 212 enters the groove in the limiting 209 under the elastic force of the limiting spring 211, thereby ensuring the effectiveness of shifting gears. In other embodiments, the accommodating hole 210 can be a through hole or a accommodating groove arranged around the outer surface of the input shaft 2, and multiple limiting springs 211 and limiting balls 212 can be installed to ensure that the gear position is more stable.

[0053] During implementation, in order to ensure better clutch effect, such as Figure 3 , 6 , 9 and Fig.10 , a return spring 311 is also sleeved on the right side of the clutch pin 307. Specifically, either end of the return spring 311 is fixed, that is, the left end of the return spring 311 is fixed to the bottom of the clutch hole, or the right end is fixed to the left end of the clutch pin 307; a clutch operating component 6 is also provided on the box body 1; Figure 6 The clutch operating assembly 6 includes an end cover 601, and the clutch pin 307 is rotatably connected to a side of the end cover 6 close to the transmission shaft 3, specifically through a bearing connection to ensure that the spring winding failure occurs when the clutch pin 307 and the transmission shaft 3 rotate synchronously; the setting of the reset spring 311 will squeeze the reset spring when the clutch pin 307 moves toward the bottom of the mounting hole, and when the clutch pin 307 is reset, the reset spring 311 will provide a thrust for the clutch pin 307, so that the reset speed of the clutch pin 307 is stronger and the response to stopping power transmission is faster; through the setting of the end cover 301, it is convenient for the clutch pin 307 to rotate synchronously when the transmission shaft 3 rotates, and the clutch control can be achieved by only moving the end 301 cover, which is simple and convenient.

[0054] During implementation, in order to further improve the clutch effect, such as Figure 2 and Fig. 9 The right side of the transmission sleeve 302 is a matching section 312, wherein the matching section 312 is located outside the mounting hole 306, and a receiving groove 313 is provided on one side of the inner wall of the matching section 312, and the receiving groove 313 matches with the clutch ball 309; Fig.10The receiving groove 313 is an arc-shaped groove, wherein the left and right sides of the groove bottom of the receiving groove 313 are respectively a limiting section 315 and a smooth section 314, wherein the arc length of the smooth section 314 projected onto the matching section 312 is greater than the arc length of the limiting section 315 projected onto the matching section 312, and the smooth section 314 of the receiving groove 313 is similar to the limiting section 315 of the adjacent receiving groove 313; the smooth section 314 and the limiting section 315 are distributed along the rotation direction of the transmission shaft; during implementation, by setting the receiving groove 313 on the matching section 312 The arrangement can make the contact area between the clutch ball 309 and the transmission sleeve 302 larger, effectively improve the stability of power transmission, and will not affect the rotation of the transmission sleeve 302; through the arrangement of the smooth section 314, it is convenient for the clutch ball 309 to smoothly enter the accommodating groove 313, and the arc length corresponding to the limiting section 315 is shorter, so the limiting section 315 can well play the role of limiting the clutch ball 309, preventing the clutch ball 309 from moving in the arc groove and then slipping.

[0055] In specific implementation, when the clutch ball 309 is pushed to contact the transmission sleeve 302, it will also contact and squeeze the edge of the mounting hole 306, and burrs will appear in this squeezing. Fig.11 An annular groove 316 is provided on the outer surface of the transmission shaft 3, wherein the annular groove 316 is provided on the circumference of the mounting hole 306; when burrs appear, the burrs are located in the annular groove 316 and will not protrude from the outer surface of the transmission shaft 3, thereby not affecting the rotation of the transmission sleeve 302 on the transmission shaft 3.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims.

Claims

1. A highly integrated agricultural machinery gearbox, comprising a housing (1), wherein an input shaft (2), a transmission shaft (3) and an output shaft (4) are rotatably connected in the housing (1), characterized in that: The input shaft (2) comprises a spline section (201) and an optical shaft section (202); the spline section (201) is provided with a sliding sleeve (203); the optical shaft section (202) is sleeved with an input duplex tooth (204); the transmission shaft (3) is sleeved with a transmission duplex tooth (301) and a transmission sleeve (302); the gear of the sliding sleeve (203) is meshed with a transmission first tooth (303) of the transmission duplex tooth (301), the transmission second tooth (304) of the transmission duplex tooth (301) is meshed with an input first tooth (205) of the input duplex tooth (204), and the input second tooth (206) of the input duplex tooth (204) is meshed with the transmission sleeve (302); the input first tooth (205) faces the inner hole of one side of the sliding sleeve (203); A toothed groove (207) is arranged on the side, and the toothed groove (207) cooperates with the gear of the sliding sleeve (203); a clutch hole (305) is axially opened in the middle of one end of the transmission shaft (3), and a plurality of radially arranged mounting holes (306) are arranged on the outer side of the transmission shaft (3), and the mounting holes (306) and the clutch hole (305) are connected; a clutch pin (307) is arranged in the clutch hole (305), and a conical clutch section (308) is arranged at one end of the clutch pin (307) close to the bottom of the clutch hole (305), and a clutch ball (309) is arranged in the mounting hole (306), and when the clutch section (308) moves axially along the clutch hole (305), it drives the clutch ball (309) to connect and separate with the inner wall of the transmission sleeve (302).

2. The highly integrated agricultural machinery gearbox according to claim 1, characterized in that: The other end of the transmission shaft (3) is provided with a bevel gear (310), and the corresponding end of the output shaft (4) is provided with a bevel gear (401) matching with the bevel gear (310); the end of the spline section (201) of the input shaft (2) is also sleeved with an input sleeve (200).

3. The highly integrated agricultural machinery gearbox according to claim 1, characterized in that: The sliding sleeve (203) is provided with an annular mounting groove (208); the housing (1) is provided with a shift assembly (5), the shift assembly (5) comprising a mounting rod (501), the mounting rod (501) being rotatably connected to the gearbox housing (1); a shift arm (502) is provided at one end of the mounting rod (501) outside the gearbox housing (1), and a shift wheel (503) is rotatably connected at the other end of the mounting rod (501); the shift wheel (503) is arranged in the annular mounting groove (208) and can drive the sliding sleeve (203) to move axially along the input shaft (2).

4. The highly integrated agricultural machinery gearbox according to claim 3, characterized in that: The shift assembly (5) further comprises a rod sleeve (504), wherein the rod sleeve (504) is fixedly arranged on the housing (1), the mounting rod (501) is rotatably connected in the rod sleeve (504), a sealing ring (505) is further arranged between the mounting rod (501) and the rod sleeve (504), and an oil seal (506) is arranged at one end of the rod sleeve close to the shift arm (502).

5. The highly integrated agricultural machinery gearbox according to claim 3, characterized in that: A plurality of limiting grooves (209) are arranged on one side of the inner wall of the sliding sleeve (203); a receiving hole (210) is arranged on the input shaft (2), a limiting spring (211) is arranged in the receiving hole (210), a limiting ball (212) is arranged at the free end of the limiting spring (211), and the limiting ball (212) cooperates with the limiting groove (209).

6. The highly integrated agricultural machinery gearbox according to claim 1, characterized in that: The clutch pin (307) is also sleeved with a return spring (311) on one side of the bottom of the clutch hole (305); a clutch operating assembly (6) is also provided on the housing (1), and the clutch operating assembly (6) comprises an end cover (601), and the clutch pin (307) is rotatably connected to a side of the end cover (601) close to the transmission shaft (3).

7. The highly integrated agricultural machinery gearbox according to claim 6, characterized in that: The clutch operating assembly (6) comprises a pivot (602), the pivot (602) being rotatably connected to the box body (1), a mounting sleeve (603) being provided on the outer side of the pivot (602), a toggle rod (604) being provided on both axial sides of the mounting sleeve (603), and the other end of the toggle rod (604) being connected to the other side of the end cover (601).

8. The highly integrated agricultural machinery gearbox according to claim 1, characterized in that: The transmission shaft sleeve (302) comprises a matching section (312), the matching section (312) is located outside the clutch hole (305), and a receiving groove (313) is provided on one side of the inner wall of the matching section (312), and the receiving groove (313) matches with the clutch ball (309).

9. The highly integrated agricultural machinery gearbox according to claim 1, characterized in that: The receiving groove (313) is an arc-shaped groove. The two sides of the groove bottom of the receiving groove (313) are respectively a smooth section (314) and a limiting section (315). The arc length of the smooth section (314) projected onto the matching section (312) is greater than the arc length of the limiting section (315) projected onto the matching section (312). The smooth section (314) of the receiving groove (313) and the limiting section (315) of the adjacent receiving groove (313) are similar. The smooth section (314) and the limiting section (315) are distributed along the rotation direction of the transmission shaft (3).

10. The highly integrated agricultural machinery gearbox according to claim 1, characterized in that: The outer surface of the transmission shaft (3) is provided with an annular groove (316), and the annular groove (316) is arranged around the location of the mounting hole (306).

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