Quick detachable drive shaft for agricultural machines

Abstract

The application provides a quick detachable agricultural machinery transmission shaft, and belongs to the technical field of transmission shafts, which solves the problems of inconvenient replacement and disassembly of the existing agricultural machinery transmission shaft and the lack of protection function. The quick detachable agricultural machinery transmission shaft comprises a mounting block, protection mechanisms are symmetrically arranged on the two sides of the mounting block, a transmission shaft body is slidably arranged in the mounting block, an axial limiting mechanism is arranged on the mounting block, a fixing block is arranged in the protection mechanism, symmetrically distributed threaded pins are arranged on the protection mechanism, rotating handles are fixed to the ends of the threaded pins, a clamping groove and a avoiding groove are arranged on the fixing block, a hinged seat is arranged on the protection mechanism, a cross shaft is hinged to the hinged seat, and a connecting ring is arranged at the end of the cross shaft. The application can quickly and conveniently disassemble the agricultural machinery transmission shaft, prevent dust and soil from entering the device during the operation of the agricultural machinery, protect the agricultural machinery transmission shaft, and adjust the protection mechanism according to the length of the agricultural machinery transmission shaft, thereby improving the protection capability.

Description

Technical Field

[0001] This invention belongs to the field of transmission shaft technology and relates to a quick-disassembly agricultural machinery transmission shaft. Background Technology

[0002] Agricultural machinery drive shafts are used for power transmission in modern agricultural machinery. They are most commonly used for power transmission between tractors and implements or between the power output and input of agricultural machinery itself, thereby enabling the agricultural machinery to achieve normal operation.

[0003] The drive shafts of existing agricultural machinery are generally fastened with multiple bolts, which makes replacement and disassembly cumbersome. Moreover, when used for transmission between tractors and implements, the drive shafts are often exposed to the outside environment without any protection, which makes the harsh working environment during agricultural machinery operation affect the drive shafts.

[0004] A search revealed a Chinese patent document disclosing a quick-disassembly agricultural machinery drive shaft [Application No.: 201920166117.5; Publication No.: CN209743414U]. This agricultural machinery drive shaft includes a movable shaft and a fixed shaft, which are movably connected at their adjacent ends. The movable shaft, from left to right, includes a first prism segment and a first cylindrical segment, while the fixed shaft, from left to right, includes a second cylindrical segment and a second prism segment.

[0005] Although the agricultural machinery drive shaft disclosed in this patent can be disassembled relatively easily, the disassembly method is still quite complicated and difficult. Moreover, it lacks protective functions, cannot adapt to the harsh working environment of agricultural machinery, and has a short service life.

[0006] Based on this, we propose a quick-disassembly agricultural machinery driveshaft. This device reduces disassembly difficulty, increases the engagement strength of the driveshaft during engagement, improves the stability of the device, prevents dust and mud from entering the device during agricultural machinery operation, avoids the impact of harsh working environments on the operation of the device, reduces wear on the driveshaft body from the external environment, increases the service life of the driveshaft body, and allows adjustment of the connecting rod length to adapt to agricultural machinery driveshafts of different lengths, thus expanding the scope of application. Summary of the Invention

[0007] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a quick-disassembly agricultural machinery drive shaft. The technical problem this invention aims to solve is: how to quickly and conveniently disassemble a high-strength agricultural machinery drive shaft while also providing adjustable protective functions.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A quick-detachable agricultural machinery drive shaft includes a mounting block. Protective mechanisms are symmetrically arranged on both sides of the mounting block. The drive shaft body is slidably disposed within the mounting block. The mounting block is equipped with an axial limiting mechanism. A fixing block is located inside the protective mechanism. Symmetrically distributed threaded pins are provided on the protective mechanism. A rotating handle is fixed to the end of each threaded pin. A snap-fit ​​groove and a clearance groove are provided on the fixing block. A hinge seat is provided on the protective mechanism. A cross shaft is hinged to the hinge seat. A connecting ring is provided at the end of the cross shaft.

[0010] The working principle of this invention is as follows: During disassembly, rotate the handle to rotate the threaded pin until it is disassembled. Pull the two connecting rings, which in turn drive the two cross shafts to open. The two cross shafts then drive the two hinge seats to open, and the two hinge seats then drive the two protective mechanisms to open. The protective mechanisms are then disassembled. Through the axial limiting mechanism, the axial disassembly of the main body of the transmission shaft is completed quickly and conveniently, thus completing the rapid disassembly of the agricultural machinery transmission shaft.

[0011] The main body of the drive shaft consists of an upper drive shaft and a lower drive shaft. The outer side of the middle end of the upper and lower drive shafts is fixed with circumferentially distributed sliding protrusions. The middle end of the upper and lower drive shafts is fixed with symmetrically distributed limiting protrusions. The middle part of the upper drive shaft is provided with a snap-fit ​​groove, and the middle part of the lower drive shaft is provided with a snap-fit ​​protrusion. The snap-fit ​​protrusion engages with the snap-fit ​​groove.

[0012] By adopting the above structure, the main body of the drive shaft is divided into two parts: an upper drive shaft and a lower drive shaft. This allows for quick disassembly of the main body of the drive shaft, reducing the difficulty of disassembly. During disassembly, the upper drive shaft is pulled out first, followed by the lower drive shaft, making it easy and convenient to disassemble the main body of the drive shaft.

[0013] Both the upper and lower drive shafts are fixed with snap-fit ​​blocks at their ends. Each snap-fit ​​block has a limiting groove in the middle and symmetrically distributed limiting protrusions on its sides. Both snap-fit ​​blocks engage with the snap-fit ​​grooves.

[0014] With the above structure, the locking block is a cuboid, which can increase the locking strength during locking and improve the stability of the device. The limiting concave strip and limiting convex strip can assist the locking block in locking, further improving the locking strength and the overall strength of the device. During disassembly, the upper drive shaft drives one of the locking blocks to be pulled out of the locking groove, and the lower drive shaft drives the other locking block to be pulled out of the locking groove, which can easily and conveniently complete the disassembly of the locking block.

[0015] The protective mechanism includes a fixed base, a hinged base fixed to the outer wall of the fixed base, a fixed block fixed to the inner wall of the fixed base, and symmetrically distributed snap-fit ​​bases fixed at the upper and lower ends of the fixed base. A right protective shell or a left protective shell is provided between the snap-fit ​​base and the threaded pin. Both the right and left protective shells have slots. The inner wall of the left protective shell abuts against the outer wall of the right protective shell. The right and left protective shells form a protective outer shell. A protective pad is provided on the protective outer shell, and a mounting hole is provided on the protective pad. A rotating base is fixed in the mounting hole. The unthreaded portion of the threaded pin... The rotating part is set inside the rotating seat. A fixing groove is opened on the front end face of the fixed seat. A limiting pin is installed in the fixing groove. Two symmetrically distributed connecting rods are fixed on the inner wall of the fixed seat. The connecting rod consists of a positive thread rod, an adjusting screw, and a negative thread rod. The inner end of the positive thread rod is screwed to one end of the adjusting screw, and the inner end of the negative thread rod is rotatably connected to the other end of the adjusting screw. The outer end of the positive thread rod has a through hole and is slidably connected to the fixing groove. The limiting pin passes through the through hole and is engaged in the fixing groove. The outer end of the negative thread rod has a threaded hole.

[0016] With the above structure, the protective shell can prevent most of the dust and dirt during agricultural machinery operation from entering the device. The protective pad can prevent dust and dirt from entering the device through the slot. During disassembly, turn the rotating handle to unscrew the threaded pin. The threaded pin releases its limit and removes the protective pad together. The two hinge seats pull the two fixing blocks apart, and the two fixing blocks pull the connecting rod and the two protective shells apart. Pull out the limit pin to complete the disassembly of the protective shell. According to the required length of the agricultural machinery drive shaft, turn the adjusting screw. The adjusting screw drives the positive thread rod and the negative thread rod to move in opposite directions, thereby adjusting the length of the connecting rod.

[0017] The mounting block has a sliding groove in the middle, and the main body of the drive shaft is slidably connected inside the sliding groove. The mounting block has symmetrically distributed mounting grooves, and the reverse threaded rod is slidably installed in the mounting groove. The upper and lower ends of the mounting block have symmetrically distributed threaded holes. The threaded holes are connected to the mounting grooves, and the slots are connected to the threaded holes. The threaded pin passes through the slots and is threadedly connected to the threaded holes and the threaded holes.

[0018] With the above structure, the drive shaft body can be easily installed and disassembled through the sliding groove. The use of threaded hole one, slot hole two and threaded pin can fix the spur thread rod and the protective shell, improving the axial stability of the device. When disassembling, pull out the threaded pin, and the spur thread rod is pulled out from the mounting groove through the fixing block, contacting the fixing of the protective shell, which facilitates subsequent disassembly.

[0019] The axial limiting mechanism includes a baffle, and symmetrically distributed reset grooves are provided at both ends of the mounting block. Symmetrically distributed slide rods are slidably connected in the reset grooves. The baffle is fixed between two slide rods. A connecting plate is fixed to the end of the baffle. A handle is fixed to the end of the connecting plate. Several reset springs are fixed in the reset grooves. The ends of the reset springs are fixedly connected to the slide rods.

[0020] With the above structure, during installation, pulling the handle causes the baffle to slide outward, allowing the upper and lower drive shafts to be inserted. Releasing the handle causes the return spring to reset the slide rod, which in turn causes the baffle to slide inward until it contacts the two limiting protrusions, thus axially limiting the drive shaft body and improving the stability of the device. During disassembly, pulling the handle causes the baffle to slide outward until it no longer contacts the two limiting protrusions, releasing the axial limitation on the drive shaft body. The upper and lower drive shafts can then be pulled out of the sliding groove, completing the disassembly of the drive shaft body.

[0021] Compared with existing technologies, this quick-detachable agricultural machinery drive shaft has the following advantages:

[0022] 1. The protective mechanism can prevent dust and mud from entering the device during agricultural machinery operation, avoid the harsh working environment from affecting the operation of the device, reduce the wear of the drive shaft body by the external environment, and improve the service life of the drive shaft body.

[0023] 2. The axial limiting mechanism can limit the axial movement of the transmission shaft body, preventing the transmission shaft body from moving axially or detaching, thus improving the stability and strength of the device.

[0024] 3. By setting the snap-fit ​​block as a cuboid, the snap-fit ​​strength during snap-fit ​​can be increased, thereby improving the stability of the device. The limiting concave strip and limiting convex strip can assist the snap-fit ​​block in snap-fitting, further improving the snap-fit ​​strength and the overall strength of the device.

[0025] 4. By using threaded hole one, slot hole two, and threaded pin in combination, the straight thread rod and protective shell can be fixed, thereby improving the axial stability of the device.

[0026] 5. By dividing the main body of the drive shaft into two parts, the upper drive shaft and the lower drive shaft, and then disassembling them separately, the difficulty of disassembly can be reduced, and the main body of the drive shaft can be quickly disassembled.

[0027] 6. By using two positive thread rods and an adjusting screw, the length of the connecting rod can be adjusted to suit agricultural machinery drive shafts of different lengths, thus increasing its application range. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention.

[0029] Figure 2 This is a cross-sectional structural diagram of some components in this invention.

[0030] Figure 3 This is a schematic diagram of the structure of the transmission shaft body in this invention.

[0031] Figure 4 yes Figure 2 A magnified structural diagram of point A in the middle.

[0032] Figure 5 This is a cross-sectional structural diagram of the fixing block in this invention.

[0033] Figure 6 This is a cross-sectional structural diagram of the mounting block in this invention.

[0034] In the diagram: 1. Protective housing; 2. Mounting block; 3. Cross shaft; 4. Connecting ring; 5. Snap-fit ​​seat; 6. Connecting rod; 7. Fixing seat; 8. Limiting pin; 9. Handle; 10. Baffle; 11. Threaded pin; 12. Fixing block; 13. Limiting protrusion; 14. Limiting protrusion; 15. Limiting recess; 16. Drive shaft body; 17. Snap-fit ​​block; 18. Rotary handle; 19. Snap-fit ​​groove; 20. Sliding groove ; 21. Clearance groove; 22. Upper drive shaft; 23. Sliding protrusion; 24. Slide rod; 25. Return spring; 26. Connecting plate; 27. Threaded hole one; 28. Lower drive shaft; 29. ​​Return groove; 30. Snap-fit ​​protrusion; 31. Hinge seat; 32. Adjusting screw; 33. Positive thread rod; 34. Negative thread rod; 35. Rotating seat; 36. Protective pad; 37. Right protective shell; 38. Left protective shell. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] like Figures 1-6As shown, this quick-detachable agricultural machinery drive shaft includes a mounting block 2. Protective mechanisms are symmetrically arranged on both sides of the mounting block 2. The drive shaft body 16 is slidably mounted inside the mounting block 2. The mounting block 2 is equipped with an axial limiting mechanism. A fixing block 12 is located inside the protective mechanism. Symmetrically distributed threaded pins 11 are provided on the protective mechanism. A rotating handle 18 is fixed to the end of each threaded pin 11. The fixing block 12 has a snap-fit ​​groove 19 and a clearance groove 21. A hinge seat 31 is provided on the protective mechanism. A cross shaft 3 is hinged to the hinge seat 31. The cross shaft 3... The end is provided with a connecting ring 4. In this embodiment, during disassembly, the rotating handle 18 is rotated, which drives the threaded pin 11 to rotate until the threaded pin 11 is disassembled. The two connecting rings 4 are pulled, and the two connecting rings 4 respectively drive the two cross shafts 3 to open. The two cross shafts 3 respectively drive the two hinge seats 31 to open. The two hinge seats 31 respectively drive the two protective mechanisms to open. The protective mechanisms are disassembled. Through the axial limiting mechanism, the axial disassembly of the transmission shaft body 16 is completed quickly and conveniently, and the agricultural machinery transmission shaft is quickly disassembled.

[0037] The drive shaft body 16 is composed of an upper drive shaft 22 and a lower drive shaft 28. Circumferentially distributed sliding protrusions 23 are fixed on the outer side of the middle ends of the upper drive shaft 22 and the lower drive shaft 28. Symmetrically distributed limiting protrusions 13 are fixed on the middle ends of both the upper drive shaft 22 and the lower drive shaft 28. A snap-fit ​​groove is provided in the middle of the upper drive shaft 22, and a snap-fit ​​protrusion 30 is provided in the middle of the lower drive shaft 28. The snap-fit ​​protrusion 30 engages with the snap-fit ​​groove. In this embodiment, by dividing the drive shaft body 16 into two parts, the upper drive shaft 22 and the lower drive shaft 28, the drive shaft body 16 can be quickly disassembled, reducing the difficulty of disassembly. During disassembly, the upper drive shaft 22 is pulled out first, and then the lower drive shaft 28 is pulled out, making the disassembly of the drive shaft body 16 easy and convenient.

[0038] Both the upper drive shaft 22 and the lower drive shaft 28 have locking blocks 17 fixed at their ends. Each locking block 17 has a limiting recess 15 in the middle and a symmetrically distributed limiting protrusion 14 fixed on its side. Both locking blocks 17 engage with the locking groove 19. In this embodiment, the locking block 17 is a cuboid, which can increase the engagement strength and improve the stability of the device. The limiting recess 15 and the limiting protrusion 14 can assist the locking block 17 in engaging, further improving the engagement strength and the strength of the device. When disassembling, the upper drive shaft 22 drives one of the locking blocks 17 to be pulled out of the locking groove 19, and the lower drive shaft 28 drives the other locking block 17 to be pulled out of the locking groove 19, which can easily and conveniently complete the disassembly of the locking block 17.

[0039] The protective mechanism includes a fixed base 7, a hinged base 31 fixed to the outer wall of the fixed base 7, a fixing block 12 fixed to the inner wall of the fixed base 7, and symmetrically distributed snap-fit ​​bases 5 fixed at the upper and lower ends of the fixed base 7. A right protective shell 37 or a left protective shell 38 is provided between the snap-fit ​​base 5 and the threaded pin 11. Both the right protective shell 37 and the left protective shell 38 have slots. The inner wall of the left protective shell 38 abuts against the outer wall of the right protective shell 37. The right protective shell 37 and the left protective shell 38 form a protective outer shell 1. The upper part is provided with a protective pad 36, and the protective pad 36 has a mounting hole. A rotating seat 35 is fixed in the mounting hole. The unthreaded part of the threaded pin 11 is rotatably mounted in the rotating seat 35. A fixing groove is provided on the front end face of the fixing seat 7, and a limit pin 8 is provided in the fixing groove. Two symmetrically distributed connecting rods 6 are fixed on the inner wall of the fixing seat 7. The connecting rod 6 is composed of a positive thread rod 33, an adjusting screw 32, and a negative thread rod 34. The inner end of the positive thread rod 33 is screwed to one end of the adjusting screw 32, and the negative thread rod 34 is screwed to the other end. The inner end of rod 34 is rotatably connected to the other end of adjusting screw 32. The outer end of the positive thread rod 33 has a through hole and is slidably connected to the fixing groove. The limiting pin 8 passes through the through hole and is engaged in the fixing groove. The outer end of the reverse thread rod 34 has a threaded hole. In this embodiment, the protective shell 1 can prevent most of the dust and mud during agricultural machinery operation from entering the device. The protective pad 36 can prevent the dust and mud during agricultural machinery operation from entering the device through the slot hole. When disassembling, rotate the rotating handle 18 to drive the threaded pin 11 out. The threaded pin 11 is released from the limit and drives the protective pad 36 to be disassembled together. The two hinge seats 31 drive the two fixing blocks 12 to be pulled apart respectively. The two fixing blocks 12 drive the connecting rod 6 and the two protective shells 1 to be pulled apart respectively. Pull out the limiting pin 8 to complete the disassembly of the protective shell 1. According to the length requirement of the agricultural machinery drive shaft, rotate the adjusting screw 32. The adjusting screw 32 drives the positive thread rod 33 and the reverse thread rod 34 to move towards each other or in opposite directions, thereby adjusting the length of the connecting rod 6.

[0040] The mounting block 2 has a sliding groove 20 in the middle, and the drive shaft body 16 is slidably connected inside the sliding groove 20. The mounting block 2 has symmetrically distributed mounting grooves, and the reverse threaded rod 34 is slidably installed in the mounting groove. The upper and lower ends of the mounting block 2 have symmetrically distributed threaded holes 27. The threaded holes 27 communicate with the mounting grooves, and the slots communicate with the threaded holes 27. The threaded pin 11 passes through the slots and is threadedly connected to the threaded holes 27 and 2. In this embodiment, the drive shaft body 16 can be easily installed and removed through the sliding groove 20. Through the cooperation of the threaded holes 27, the slots, the threaded holes, and the threaded pin 11, the spur threaded rod 33 and the protective shell 1 can be fixed, improving the axial stability of the device. When disassembling, the threaded pin 11 is pulled out, and the spur threaded rod 33 is pulled out from the mounting groove through the fixing block 12, contacting the fixing of the protective shell 1, which facilitates subsequent disassembly.

[0041] The axial limiting mechanism includes a baffle 10. The mounting block 2 has symmetrically distributed reset grooves 29 at both ends. Symmetrically distributed slide rods 24 are slidably connected within the reset grooves 29. The baffle 10 is fixed between two slide rods 24. A connecting plate 26 is fixed to the end of the baffle 10, and a handle 9 is fixed to the end of the connecting plate 26. Several reset springs 25 are fixed within the reset grooves 29, and the ends of the reset springs 25 are fixedly connected to the slide rods 24. In this embodiment, during installation, pulling the handle 9 causes the baffle 10 to slide outward, allowing the upper drive shaft 22 and lower drive shaft 28 to be inserted respectively. Release the handle 9, and the return spring 25 drives the slide rod 24 to reset. The slide rod 24 drives the baffle 10 to slide inward until the baffle 10 touches between the two limiting protrusions 13, thereby achieving axial limitation of the transmission shaft body 16 and improving the stability of the device. When disassembling, pull the handle 9, and the handle 9 drives the baffle 10 to slide outward until the baffle 10 no longer touches between the two limiting protrusions 13, thus releasing the axial limitation of the transmission shaft body 16. Then, pull the upper transmission shaft 22 and the lower transmission shaft 28 out of the sliding groove 20 respectively to complete the disassembly of the transmission shaft body 16.

[0042] The working principle of this invention is as follows: During disassembly, rotating the handle 18 causes the threaded pin 11 to unscrew, releasing the limit and disassembling the protective pad 36. After the threaded pin 11 is disassembled, pulling the two connecting rings 4 causes the two cross shafts 3 to open, which in turn causes the two hinge seats 31 to open. The two hinge seats 31 then cause the two fixing blocks 12 to open, which in turn cause the two connecting rods 6 to be pulled out of the mounting slots, releasing the fixation on the protective shell 1. The limit pin 8 is then pulled out, completing the disassembly of the protective shell. To disassemble the housing 1, pull the handle 9. The handle 9 will cause the baffle 10 to slide outward until the baffle 10 no longer touches between the two limiting protrusions 13. This will release the axial limitation on the transmission shaft body 16, and the upper transmission shaft 22 and the lower transmission shaft 28 will be pulled out from the sliding groove 20 respectively, thus completing the disassembly of the transmission shaft body 16 and the quick disassembly of the agricultural machinery transmission shaft. In this device, the adjusting screw 32 can be rotated according to the required length of the agricultural machinery transmission shaft. The adjusting screw 32 will drive the positive thread rod 33 and the negative thread rod 34 to move in opposite directions or in the opposite direction, thereby adjusting the length of the connecting rod 6.

[0043] In summary, the protective mechanism can prevent dust and mud from entering the device during agricultural machinery operation, avoid the adverse working environment from affecting the operation of the device, reduce the wear of the external environment on the drive shaft body 16, and improve the service life of the drive shaft body 16.

[0044] The axial limiting mechanism can limit the axial movement of the drive shaft body 16, preventing it from moving axially or detaching, thus improving the stability and strength of the device.

[0045] By setting the snap-fit ​​block 17 as a cuboid, the snap-fit ​​strength during snap-fit ​​can be increased, thereby improving the stability of the device. The limiting concave strip 15 and the limiting convex strip 14 can assist the snap-fit ​​block 17 in snap-fitting, further improving the snap-fit ​​strength and the overall strength of the device.

[0046] By using the threaded hole 27, the slot, the threaded hole 2, and the threaded pin 11 together, the straight thread rod 33 and the protective shell 1 can be fixed, thereby improving the axial stability of the device.

[0047] By dividing the drive shaft body 16 into two parts, the upper drive shaft 22 and the lower drive shaft 28, and then disassembling them separately, the disassembly difficulty can be reduced, and the drive shaft body 16 can be quickly disassembled.

[0048] By using the two positive thread rods 33 and the adjusting screw 32 together, the length of the connecting rod 6 can be adjusted to adapt to agricultural machinery drive shafts of different lengths, thus increasing its range of applications.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A quick-detachable agricultural machinery drive shaft, comprising a mounting block (2), characterized in that, The mounting block (2) is symmetrically equipped with protective mechanisms on both sides. A drive shaft body (16) is slidably installed inside the mounting block (2). The mounting block (2) is equipped with an axial limiting mechanism. A fixing block (12) is provided inside the protective mechanism. Threaded pins (11) are symmetrically distributed on the protective mechanism. A rotating handle (18) is fixed to the end of each threaded pin (11). A snap-fit ​​groove (19) and a clearance groove (21) are provided on the fixing block (12). A hinge seat (31) is provided on the protective mechanism. A cross shaft (3) is hinged to the hinge seat (31). A connecting ring (4) is provided at the end of the cross shaft (3). The drive shaft body (16) is connected to the upper drive shaft (22). The upper drive shaft (22) and the lower drive shaft (28) are composed of a lower drive shaft (28). Sliding protrusions (23) are evenly distributed around the middle ends of the upper drive shaft (22) and the lower drive shaft (28). Symmetrically distributed limiting protrusions (13) are fixed at the middle ends of both the upper drive shaft (22) and the lower drive shaft (28). A snap-fit ​​groove is provided in the middle of the upper drive shaft (22), and a snap-fit ​​protrusion (30) is provided in the middle of the lower drive shaft (28). The snap-fit ​​protrusion (30) engages with the snap-fit ​​groove. The protective mechanism includes a fixed seat (7), a hinge seat (31) fixed to the outer wall of the fixed seat (7), and a fixing block (12) fixed to the inner wall of the fixed seat (7). Symmetrically distributed snap-fit ​​seats (5) are fixed at both ends. A right protective shell (37) or a left protective shell (38) is provided between the snap-fit ​​seat (5) and the threaded pin (11). Both the right protective shell (37) and the left protective shell (38) have slots. The inner wall of the left protective shell (38) abuts against the outer wall of the right protective shell (37). The right protective shell (37) and the left protective shell (38) form a protective shell (1). A protective pad (36) is provided on the protective shell (1). An installation hole is provided on the protective pad (36). A rotating seat (35) is fixed in the installation hole. The unthreaded part of the threaded pin (11) is rotatably set in the rotating seat (35). The fixed seat ( A fixing groove is provided on the front end face of the fixing seat (7), and a limiting pin (8) is provided in the fixing groove. Two symmetrically distributed connecting rods (6) are fixed on the inner wall of the fixing seat (7). The connecting rod (6) is composed of a spur thread rod (33), an adjusting screw (32) and a reverse thread rod (34). The inner end of the spur thread rod (33) is screwed to one end of the adjusting screw (32), and the inner end of the reverse thread rod (34) is rotatably connected to the other end of the adjusting screw (32). The outer end of the spur thread rod (33) is provided with a through hole and is slidably connected to the fixing groove. The limiting pin (8) passes through the through hole and is engaged in the fixing groove. The outer end of the reverse thread rod (34) is provided with a threaded hole.The axial limiting mechanism includes a baffle (10), and symmetrically distributed reset grooves (29) at both ends of the mounting block (2). Symmetrically distributed slide rods (24) are slidably connected in the reset grooves (29). The baffle (10) is fixed between two slide rods (24). A connecting plate (26) is fixed to the end of the baffle (10), and a handle (9) is fixed to the end of the connecting plate (26). Several reset springs (25) are fixed in the reset grooves (29), and the ends of the reset springs (25) are fixedly connected to the slide rods (24).

2. The quick-detachable agricultural machinery drive shaft according to claim 1, characterized in that, Both the upper drive shaft (22) and the lower drive shaft (28) are fixed with snap-fit ​​blocks (17). Each snap-fit ​​block (17) has a limiting groove (15) in the middle. Each snap-fit ​​block (17) has a symmetrically distributed limiting protrusion (14) on its side. Both snap-fit ​​blocks (17) engage with the snap-fit ​​groove (19).

3. The quick-detachable agricultural machinery drive shaft according to claim 2, characterized in that, The mounting block (2) has a sliding groove (20) in the middle. The drive shaft body (16) is slidably connected inside the sliding groove (20). The mounting block (2) has symmetrically distributed mounting grooves. The reverse threaded rod (34) is slidably installed in the mounting groove. The upper and lower ends of the mounting block (2) have symmetrically distributed threaded holes (27). The threaded hole (27) is connected to the mounting groove. The groove is connected to the threaded hole (27). The threaded pin (11) passes through the groove and is threadedly connected to the threaded hole (27) and the threaded hole (27).

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