Rotary cultivator cutterhead with cutters easy to replace

Abstract

A rotary cultivator cutter head with cutters easy to replace comprises a cutter holder fixed to a rotating shaft, a first square groove matched with the rotating shaft is formed in the center of the cutter holder, a plurality of cutter clamping mechanisms are arranged on the periphery of the cutter holder in a circumferential mode, and each cutter clamping mechanism comprises a first clamping seat fixed to the cutter holder. A second clamping seat is hinged to the end, away from the tool apron, of the first clamping seat, and a rotary blade is installed between the first clamping seat and the second clamping seat. The tool has the positive effects that through the innovative design of the tool clamping mechanism and the locking mechanism, a user can rapidly complete installation and disassembly of the tool without using traditional fasteners such as bolts, the operation process is simplified through the change, the time needed for replacing the tool is greatly shortened, and the agricultural production efficiency is improved. Due to the fact that the cutter does not need to be provided with a hole to be matched with the bolt, weakening of the strength of the cutter caused by hole forming is avoided, meanwhile, due to the design of the clamping mechanism, extra stress borne by the cutter in the rotating process is reduced, and the service life of the cutter is remarkably prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of rotary tillage cutters, in particular to a rotary tiller cutter disc with easy-to-replace cutters. Background Art

[0002] The rotary tiller blade is a component on which blades are installed. It is usually made of cast iron or steel plate. It is powered by the tractor engine, and the power is transmitted to the blade through the reducer and the drive shaft, thereby driving the blade to rotate. The blade is equipped with several arc-shaped blades, which cut and turn the soil during rotation to achieve the purpose of loosening the soil, improving the soil structure and removing weeds. The installation of existing cutters on the cutter disc is generally to open holes in the cutter and fasten it with interlaced bolts. The holes in the cutter will reduce its own strength. At the same time, the position of the through hole opened in the cutter during the rotation process will generate interaction force with the bolt, thereby greatly reducing the service life of the cutter. In addition, the disassembly and replacement of the cutter is relatively complicated due to the bolt connection, and the overall efficiency of the cutter replacement is low. Summary of the invention

[0003] The purpose of the present invention is to provide a rotary tiller cutter disc with easy tool replacement, using a clamping mechanism instead of the traditional bolt connection, without the need for opening holes on the cutter, which can extend the service life of the cutter and improve the efficiency of tool removal and replacement, thus solving the problems in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a rotary tiller cutter disc with easy tool replacement includes a cutter seat fixed on a rotating shaft, a first square groove matching the rotating shaft is opened at the center of the cutter seat, and a plurality of cutter clamping mechanisms arranged circumferentially are provided on the outer periphery of the cutter seat, each cutter clamping mechanism includes a first clamping seat fixed on the cutter seat, a second clamping seat is hingedly installed at one end of the first clamping seat away from the cutter seat, a rotary tiller cutter is installed between the first clamping seat and the second clamping seat, wherein the end of the rotary tiller cutter is provided with a folded edge, the second clamping seat is provided with a positioning groove matching the folded edge, and the first clamping seat is provided with a A through slot for allowing the rotary tiller to enter and exit, a C-shaped frame is installed in the through slot, the C-shaped frame includes a vertical plate and side plates at both ends of the vertical plate, wherein the vertical plate cooperates with the through slot, the side plates are located outside the first clamping seat, a through slot connected to the through slot is also provided in the first clamping seat, a rotatable cam is installed in the through slot, a plane is provided on one end of the long diameter of the cam, a locking mechanism is provided on one side of the knife seat, the locking mechanism allows the second clamping seat to rotate close to the first clamping seat and form a fixed clamping for the rotary tiller, after the locking mechanism forms a position limit between the second clamping seat and the first clamping seat, the cam in each tool clamping mechanism rotates to the plane and the C-shaped When the vertical plates of the frame are in contact, the C-frame can press the rotary tiller onto the second clamping seat. When the cam rotates to a plane and separates from the vertical plates of the C-frame, the rotary tiller can enter the through groove for removal. The locking mechanism includes a locking seat fixed on the rotating shaft, a second square groove matching the rotating shaft is provided in the locking seat, a rotatable locking disk is installed on the outer periphery of the locking seat, a plurality of locking rods arranged in a circle are provided on the locking disk, each locking rod is arranged corresponding to the second clamping seat, a first inclined surface is provided at the end of the locking rod, and a second inclined surface is provided on the side of the second clamping seat close to the locking disk, and the first inclined surface is parallel to the second inclined surface. The arrangement is such that when the locking disk rotates relative to the locking seat, the first inclined surface moves close to the second inclined surface and presses the second clamping seat onto the first clamping seat. A movable plug column is also installed between the locking disk and the locking seat. When the locking rod presses the second clamping seat onto the first clamping seat, the plug column can limit the rotation of the locking disk relative to the locking seat. After the plug column releases the rotation limit of the locking disk, the locking disk is rotated to separate the first inclined surface from the second inclined surface. When the locking disk rotates to a position where the second clamping seat is located between adjacent locking rods, the second clamping seat can be rotated and separated from the first clamping seat, thereby realizing the removal of the rotary tiller blades in all tool clamping mechanisms on the blade holder. An adjustment handle is installed on the cam, and the adjustment handle can drive the cam to rotate. A shallow groove connected to the through groove is also provided in the first clamping seat. When the plane of the cam rotates to contact the vertical plate of the C-frame, the adjustment handle is located in the shallow groove. A convex edge is provided at the end of the second clamping seat, and the second inclined surface is located at the outer side of the convex edge. A limit block is provided on the side of the convex edge away from the rotating shaft. A limit groove matching the limit block is opened on the side of the locking rod. When the limit block is located in the limit groove, the locking rod presses the second clamping seat to position it on the first clamping seat.A limiting column is provided on the side of the knife seat close to the second clamping seat, and a limiting hole matching with the limiting column is provided on the second clamping seat. When the limiting column is located in the limiting hole, the second clamping seat and the first clamping seat can limit the torsion of each other. The locking seat is provided with two annular plates arranged side by side, the locking disk is located between the two annular plates, and bearings are provided between the end surface of the locking disk and the annular plates on both sides. A connected through hole is provided between the circular ring plate and the locking disk of the locking seat, and the plug post is cooperated and located in the through hole. A pull ring is provided at one end of the plug post, and a spring is sleeved on the outer circumference of the plug post between the pull ring and the circular ring plate. A rotatable clamping column is hingedly installed on the other end of the plug post extending out of the through hole, and the spring always has a tendency to move the clamping column closer to the circular ring plate. The length of the clamping column is greater than the diameter of the through hole. When the clamping column is perpendicular to the plug post, the plug post can be locked in the through hole between the circular ring plate and the locking disk. When the clamping column is rotated to the same axial position as the plug post, the plug post can drive the plug post to move out of the through hole.

[0005] The positive effect of the present invention is that the rotary tiller blade disc with easy tool replacement described in the present invention is provided with a plurality of tool clamping mechanisms arranged in a circle on the outer periphery of the blade seat, and each tool clamping mechanism includes a first clamping seat and a second clamping seat. The second clamping seat can be rotated close to the first clamping seat through the locking mechanism to form a fixed clamping of the rotary tiller blade. The setting of the cam and the adjustment handle enables the user to easily control the pressing and releasing of the C-shaped frame on the tool, thereby realizing the disassembly and replacement of a single tool on the blade disc. The cooperation of the locking disc and the locking rod allows the user to realize the same disassembly and replacement of all tools on the blade disc through a simple rotation action. The staff can choose different quick replacement methods according to the actual use of the tool. Through the innovative design of the tool clamping mechanism and the locking mechanism, the user can quickly complete the installation and disassembly of the tool without using traditional fasteners such as bolts. This change not only simplifies the operation process, but also greatly shortens the time required to replace the tool, thereby improving agricultural production efficiency. Since the tool no longer needs to be drilled to accommodate the bolt, the weakening of the tool strength caused by the hole is avoided. At the same time, the design of the clamping mechanism reduces the additional stress on the tool during rotation, thereby significantly extending the service life of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 yes Figure 2 Left view of; Figure 4 yes Figure 2 Right view of; Figure 5 yes Figure 2 A top view of Figure 6It is a schematic diagram of the structure of a tool clamping mechanism; Figure 7 yes Figure 6 Left view of the middle structure; Figure 8 yes Figure 6 An enlarged view of the AA section view; Fig. 9 yes Figure 7 An enlarged view of the BB section view; Fig.10 is a structural schematic diagram of the locking mechanism; Fig.11 yes Figure 2 An enlarged view of the CC section view; Fig.12 yes Figure 2 Enlarged view of the DD section view; Fig.13 It is a schematic diagram of a structure in which a movable plug is arranged between a locking seat and a locking disk; Fig.14 yes Fig.13 Schematic diagram of the state where the middle plug is moved out of the through hole; Fig.15 It is a schematic diagram of the state of removing a rotary tiller blade on a tool clamping mechanism; Fig.16 It is a schematic diagram of the state of removing the rotary tiller blades on all the tool clamping mechanisms. DETAILED DESCRIPTION

[0007] The rotary tiller blade disc with easy-to-replace blades described in the present invention is as follows: Figure 1-5 As shown, it includes a tool holder 1 fixed on the rotating shaft, and a first square groove 2 matching the rotating shaft is opened at the center position of the tool holder 1. The opening of the first square groove 2 not only provides a limit for the installation of the tool holder 1 on the rotating shaft, but also allows the tool holder 1 to rotate synchronously with the rotating shaft, wherein the tool holder 1 can be fixedly installed at a specified position in the length direction of the rotating shaft by connecting parts such as bolts.

[0008] In order to clamp and fix the tool, a plurality of tool clamping mechanisms arranged in a circle are provided on the outer circumference of the tool holder 1, such as Figure 6-9 As shown, each tool clamping mechanism includes a first clamping seat 3 fixed on the tool holder 1, and a second clamping seat 4 is hingedly installed at one end of the first clamping seat 3 away from the tool holder 1, and a rotary tiller 5 is installed between the first clamping seat 3 and the second clamping seat 4. When the second clamping seat 4 rotates close to the first clamping seat 3, the rotary tiller 5 can be clamped and fixed, and when the second clamping seat 4 rotates away from the first clamping seat 3, the rotary tiller 5 can be quickly disassembled and replaced.

[0009] The end of the rotary tiller 5 is provided with a folded edge 6, and the second clamping seat 4 is provided with a positioning groove 7 matched with the folded edge 6, so as to facilitate the positioning and insertion of the rotary tiller 5 on the second clamping seat 4. In order to facilitate the separate disassembly and assembly of the rotary tiller 5 in the tool clamping mechanism, the first clamping seat 3 is provided with a through groove 8 that allows the rotary tiller 5 to enter and exit, and a C-shaped frame 9 is installed in the through groove 8. The C-shaped frame 9 includes a vertical plate and side plates at both ends of the vertical plate, wherein the vertical plate is matched with the through groove 8, and the side plates are located outside the first clamping seat 3, which can form a closure on both sides of the through groove 8, so as to prevent the soil blocks or other impurities raised from entering the through groove 8 and affecting the normal movement of the C-shaped frame 9 during the tool rotation operation.

[0010] A through slot 10 connected to the through slot 8 is also provided in the first clamping seat 3, and a rotatable cam 11 is installed in the through slot 10. A plane 12 is provided on one end of the long diameter of the cam 11. When the cam 11 rotates, it will contact the vertical plate of the C-frame 9. During the rotation of the cam 11, the long diameter end will push the C-frame 9 to move closer to the rotary tiller 5. When the plane 12 on the cam 11 contacts the rotary tiller 5, the C-frame 9 presses the rotary tiller 5 onto the second clamping seat 4. Since the plane 12 contacts the inner side of the vertical plate of the C-frame 9, the rotary tiller 5 will always be pressed under the premise that there is no external force to rotate the cam 11.

[0011] A locking mechanism is provided on one side of the blade holder 1, and the locking mechanism can allow the second clamping seat 4 to rotate close to the first clamping seat 3 and form a fixed clamp for the rotary blade 5. After the locking mechanism is unlocked, the second clamping seat 4 can rotate away from the first clamping seat 3, so that the rotary blades 5 in all the tool clamping mechanisms on the blade holder 1 can be disassembled together. When the second clamping seat 4 rotates away from the first clamping seat 3, the C-shaped frame 9 will no longer have a pressing and clamping effect on the rotary blade 5.

[0012] The function of the C-frame 9 and the cam 11 is to separately disassemble and assemble the rotary tiller 5 in any tool clamping mechanism. After the locking mechanism forms a position limit between the second clamping seat 4 and the first clamping seat 3, when the cam 11 in each tool clamping mechanism rotates until the plane 12 contacts the vertical plate of the C-frame 9, the C-frame 9 can press the rotary tiller 5 onto the second clamping seat 4. When the cam 11 rotates until the plane 12 separates from the vertical plate of the C-frame 9, the rotary tiller 5 can enter the through groove 8 for removal.

[0013] In order to realize the clamping and limiting of the second clamping seat 4 and the first clamping seat 3 in all tool clamping mechanisms on the tool holder 1 by the locking mechanism, as shown in FIG. Figure 10-12 As shown, the locking mechanism includes a locking seat 13 fixed on the rotating shaft, and a second square groove 14 matching the rotating shaft is opened in the locking seat 13, wherein the locking seat 13 can be fixedly installed on the square rotating shaft by connecting parts such as bolts, and rotate synchronously with the rotating shaft.

[0014] A rotatable locking disk 15 is installed on the outer periphery of the locking seat 13, and a plurality of circumferentially arranged locking rods 16 are provided on the locking disk 15. Each locking rod 16 is arranged corresponding to the second clamping seat 4. When the locking disk 15 is rotated, the locking rod 16 can rotate the second clamping seat 4 closer to the first clamping seat 3 and maintain the clamping and fixation of the rotary tiller 5. When unlocking is required, the locking rod 16 only needs to be rotated and separated from the second clamping seat 4.

[0015] In order to enable the locking rod 16 to press the second clamping seat 4 onto the first clamping seat 3, a first inclined surface 17 is provided at the end of the locking rod 16, and a second inclined surface 18 is provided on the side of the second clamping seat 4 close to the locking plate 15. The first inclined surface 17 is arranged parallel to the second inclined surface 18. When the locking plate 15 rotates relative to the locking seat 13, the first inclined surface 17 moves close to the second inclined surface 18 and presses the second clamping seat 4 onto the first clamping seat 3.

[0016] In order to maintain the state that the second clamping seat 4 is pressed against the first clamping seat 3, a movable plug post 19 is also installed between the locking plate 15 and the locking seat 13. When the locking rod 16 presses the second clamping seat 4 against the first clamping seat 3, the plug post 19 can limit the rotation of the locking plate 15 relative to the locking seat 13. After the plug post 19 releases the rotation limit of the locking plate 15, the locking plate 15 is rotated to separate the first inclined surface 17 from the second inclined surface 18. When the locking plate 15 is rotated to the position where the second clamping seat 4 is located between adjacent locking rods 16, the second clamping seat 4 can be rotated and separated from the first clamping seat 3, thereby realizing the removal of the rotary blade 5 in all tool clamping mechanisms on the blade holder 1.

[0017] The rotary tiller cutter disc with easy-to-replace cutters described in the present invention has two methods of removing and replacing the rotary tiller cutters 5 thereon. The first method is to uniformly replace all the rotary tiller cutters 5 on the cutter disc, and the second method is to individually replace the rotary tiller cutters 5 on a certain cutter clamping mechanism. When rotary tilling soils of different structural types or planting different types of crops, different cutters need to be used, which requires a unified replacement method. When a worn cutter needs to be replaced, an individual replacement method can be used to improve the efficiency of cutter replacement. While ensuring normal rotary tillage operations, the common service life of all cutters on the cutter disc can also be increased.

[0018] When all the rotary tillage blades 5 on the cutter disc are uniformly replaced, the required operations are as follows: first, pull out the plug 19 between the locking disc 15 and the locking seat 13, and after the rotation locking limit is lost, Figure 4The locking disk 15 is rotated clockwise in the direction shown. During the rotation of the locking disk 15, the first inclined surface 17 and the second inclined surface 18 move away from each other, and the locking rod 16 no longer presses the second clamping seat 4 onto the first clamping seat 3. When the locking disk 15 is rotated to the point where the second clamping seat 4 is located in the gap between two adjacent locking rods 16, the second clamping seat 4 can be rotated away from the first clamping seat 3, and all the rotary tilling blades 5 on the blade disc lose their limit clamping and can be disassembled uniformly.

[0019] When the rotary tiller blade 5 on a tool clamping mechanism on the cutter disc is to be removed and replaced individually, it is done under the premise that the locking mechanism forms a position limit between the second clamping seat 4 and the first clamping seat 3. The required operations are as follows: the staff manually rotates the cam 11 to separate the plane 12 at the long diameter end of the cam 11 from the vertical plate of the C-frame 9. The C-frame 9 can enter the through groove 8 after losing the limit. At this time, the C-frame 9 no longer forms a compression limit on the rotary tiller blade 5. The rotary tiller blade 5 and the folded edge 6 at its end can enter the through groove 8, and the rotary tiller blade 5 can be pulled out from the through groove 8 to realize the individual disassembly of the tool.

[0020] After the old tool is disassembled separately, replace it with a new tool and put it into the through groove 8, then move the rotary tiller 5 close to the second clamping seat 4, so that the folded edge 6 of the rotary tiller 5 enters the positioning groove 7 to realize the positioning and installation of the tool, and then rotate the cam 11 so that the flat surface 12 at one end of its long diameter contacts the vertical plate of the C-frame 9 again. During this process, the vertical plate of the C-frame 9 will gradually move close to the rotary tiller 5 and form a tight clamping on the rotary tiller 5.

[0021] After the uniformly disassembled tools are replaced with new ones, all the second clamping seats 4 are rotated close to the first clamping seat 3, and then the locking plate 15 is rotated in the opposite direction to allow the first inclined surface 17 and the second inclined surface 18 to approach each other. The locking rod 16 presses the second clamping seat 4 onto the first clamping seat 3, and the plug post 19 is reinserted between the locking plate 15 and the locking seat 13 to form a rotation limit. Finally, the cam 11 is rotated and adjusted at the position of each tool clamping mechanism to clamp the rotary blade 5 again.

[0022] During rotary tillage operation, the shaft can rotate forward or reverse. Figure 4When the rotation direction is counterclockwise, that is, the reverse situation, the cutter disc installation method described in the figure is adopted, and the locking rod 16 on the locking mechanism rotates counterclockwise with the rotating shaft, and the rotary blade 5 in contact with the soil also rotates counterclockwise. During the rotary tillage operation, the rotary blade 5 will be subjected to resistance in the opposite direction, and the resistance will have a tendency to make the rotary blade 5 and the second clamping seat 4 rotate clockwise. In the above relative rotation, the first inclined surface 17 and the second inclined surface 18 will have a tendency to gradually approach, that is, the locking rod 16 will press the second clamping seat 4 more and more tightly, thereby avoiding the loosening phenomenon during the rotary tillage operation. When the rotating shaft rotates forward, in order to make the locking rod 16 and the second clamping seat 4 also press more and more tightly, different from the cutter disc installation method described in the figure, the cutter disc needs to be rotated 180 degrees and installed on the rotating shaft. The cutter disc installation method can be adaptively selected according to the rotation direction of the rotating shaft, thereby ensuring the stable clamping of the tool during the rotary tillage operation.

[0023] Furthermore, in order to facilitate the operator to adjust the rotation of the cam 11, an adjustment handle 20 is installed on the cam 11, and the adjustment handle 20 can drive the cam 11 to rotate. A shallow groove 21 connected to the through groove 10 is also provided in the first clamping seat 3. When the plane 12 of the cam 11 rotates to contact the vertical plate of the C-frame 9, the adjustment handle 20 is located in the shallow groove 21.

[0024] When the plane 12 of the cam 11 at one end of its long diameter abuts against the vertical plate of the C-frame 9, the C-frame 9 presses and clamps the rotary blade 5 on the second clamping seat 4, the plane 12 and the side of the vertical plate form a rotation limit, and in the absence of external force interfering with the rotation of the cam 11, the rotary blade 5 will be maintained in a clamped state. In this state, the adjustment handle 20 of the cam 11 is located in the shallow groove 21 and is protected in the shallow groove 21. It will not be affected by clods of soil or other debris during the rotary tillage operation, and the tool can be stably clamped.

[0025] When the tool needs to be disassembled, the cam 11 needs to be rotated. An inclined surface can also be provided on the upper end surface of the adjusting handle 20, so that the operator can insert his fingers into the shallow groove 21 to pull out the adjusting handle 20 and rotate it, thereby driving the cam 11 to rotate synchronously, releasing the clamping limit on the C-shaped frame 9, so as to facilitate the subsequent disassembly of the tool.

[0026] Furthermore, in order to achieve stable positioning of the second clamping seat 4, a protruding edge 22 is provided at the end of the second clamping seat 4, and the second inclined surface 18 is located on the outer side of the protruding edge 22. When the second clamping seat 4 is pressed onto the first clamping seat 3 by the locking mechanism, the side of the protruding edge 22 close to the rotating shaft can abut against the surface of the square rotating shaft, thereby achieving stable positioning support for the second clamping seat 4.

[0027] In order to avoid excessive rotation when adjusting the locking disk 15, which causes the locking rod 16 to pass over the second clamping seat 4 and fail to effectively limit the second clamping seat 4, a limit block 23 is provided on the side of the convex edge 22 away from the rotating shaft, and a limit groove 24 matching the limit block 23 is provided on the side of the locking rod 16. When the limit block 23 is located in the limit groove 24, the locking rod 16 presses the second clamping seat 4 to be positioned on the first clamping seat 3, and the setting of the limit block 23 can effectively prevent the locking rod 16 from rotating and separating from the second clamping seat 4.

[0028] The second clamping seat 4 is hingedly connected to the first clamping seat 3 via a rotating shaft, and the locking rod 16 is pressed and limited on the second clamping seat 4 by the mutual squeezing between the two inclined surfaces. When performing rotary tillage operations, the second clamping seat 4 of the above structure is easy to produce a torsion in the direction of the inclined surface relative to the first clamping seat 3 during the rotation process, thereby reducing the service life of the two components. In order to avoid the above situation, a limiting column 25 is provided on the side of the knife seat 1 close to the second clamping seat 4, and a limiting hole 26 that matches the limiting column 25 is opened on the second clamping seat 4. When the limiting column 25 is located in the limiting hole 26, the locking mechanism presses the second clamping seat 4 on the first clamping seat 3, and at the same time, the second clamping seat 4 and the first clamping seat 3 can limit the torsion between each other.

[0029] Furthermore, in order to facilitate the installation of the locking disk 15 on the locking seat 13 and realize the rotation adjustment of the locking disk 15 relative to the locking seat 13, the locking seat 13 is provided with two circular ring plates 27 arranged side by side, and the locking disk 15 is a circular ring pile and is located between the two circular ring plates 27. Bearings are provided between the end face of the locking disk 15 and the circular ring plates 27 on both sides, so that the rotation of the locking disk 15 relative to the locking seat 13 can be realized.

[0030] Furthermore, in order to facilitate the stable positioning and quick disassembly of the plug post 19 between the locking plate 15 and the locking seat 13, as shown in FIG. Fig.13 and Fig.14 As shown, a communicating through hole is provided between the annular plate 27 of the locking seat 13 and the locking disk 15. When the plug post 19 is positioned in the through hole, the locking disk 15 and the locking seat 13 are relatively locked and cannot be rotated and adjusted, that is, the locking mechanism maintains the clamping limit on the second clamping seat 4. When the plug post 19 is removed from the through hole, the locking disk 15 can rotate relative to the locking seat 13, so that the second clamping seat 4 can be released by rotating the locking mechanism, thereby realizing the unified replacement of the tools.

[0031] A pull ring 28 is provided at one end of the plug post 19, and a spring 29 is sleeved on the outer circumference of the plug post 19 between the pull ring 28 and the circular plate 27. A rotatable clamping column 30 is hingedly installed at the other end of the plug post 19 extending out of the through hole, and the spring 29 always has a tendency to move the clamping column 30 closer to the circular plate 27. The length of the clamping column 30 is greater than the diameter of the through hole. When the clamping column 30 is perpendicular to the plug post 19, the plug post 19 can be locked in the through hole between the circular plate 27 and the locking plate 15. When the clamping column 30 rotates to the same axial position as the plug post 19, the plug post 19 can drive the clamping column 30 to move out of the through hole.

[0032] When the plug 19 needs to be pulled out from the through hole in the locking disk 15 and the locking seat 13, the operator presses the pull ring 28 to overcome the elastic force of the spring 29, so that the clamping column 30 perpendicular to the plug 19 moves away from the position of the annular plate 27, and manually rotates the clamping column 30 to the same axis position as the plug 19, so that the plug 19 can be pulled out of the through hole. When the plug 19 is needed to rotate and lock the locking disk 15 and the locking seat 13, the clamping column 30 and the plug 19 need to be inserted into the through hole when they are in the same axis state, and the spring 29 is compressed to make the clamping column 30 extend out of the through hole, and then the clamping column 30 is manually rotated to be perpendicular to the plug 19. Under the tension of the spring 29, the clamping column 30 is pressed against the end surface of the annular plate 27, so that the plug 19 is stably retained in the through hole between the locking disk 15 and the locking seat 13, thereby realizing the rotational locking between the locking disk 15 and the locking seat 13.

[0033] The rotary tiller cutter disc with easy-to-replace cutters described in the present invention, through the innovative cutter clamping mechanism and locking mechanism design, allows users to quickly complete the installation and removal of cutters without using traditional fasteners such as bolts. This change not only simplifies the operating process, shortens the time required to replace cutters, and improves agricultural production efficiency; but also because there is no need to open holes on the cutter, the weakening of the cutter strength by the opening of holes is avoided. At the same time, the design of the clamping mechanism also reduces the additional stress on the cutter during rotation, thereby significantly extending the service life of the cutter. In addition, the present invention also provides a variety of quick replacement methods for staff to choose from, so as to meet the needs of different usage scenarios.

[0034] The tool clamping mechanism and locking mechanism are flexibly designed to adapt to rotary tillers of different sizes and types, meeting the diverse needs of agricultural production. The structures of various limit devices are relatively simple and easy to operate. Users do not need professional tools or skills when replacing tools or performing daily maintenance, thereby reducing maintenance costs. The overall cutter disc device not only significantly improves the tool replacement efficiency and service life, but also enhances the convenience and safety of operation, reduces maintenance costs, and has broad application prospects and significant economic benefits.

[0035] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A rotary tiller blade with easy replacement of blades, characterized in that: The invention comprises a knife seat (1) fixed on a rotating shaft, a first square groove (2) matching with the rotating shaft is provided at the center of the knife seat (1), a plurality of knife clamping mechanisms arranged circumferentially are provided on the outer circumference of the knife seat (1), each knife clamping mechanism comprises a first clamping seat (3) fixed on the knife seat (1), a second clamping seat (4) is hingedly mounted on one end of the first clamping seat (3) away from the knife seat (1), a rotary tiller (5) is mounted between the first clamping seat (3) and the second clamping seat (4), wherein the end of the rotary tiller (5) is provided with a folded edge (6), the second clamping seat (4) is provided with a positioning groove (7) matching with the folded edge (6), the first clamping seat (3) is provided with a through groove (8) for allowing the rotary tiller (5) to enter and exit, and a C A C-shaped frame (9), wherein the C-shaped frame (9) comprises a vertical plate and side plates at both ends of the vertical plate, wherein the vertical plate cooperates with the through groove (8), the side plates are located outside the first clamping seat (3), a through groove (10) connected to the through groove (8) is also provided in the first clamping seat (3), a rotatable cam (11) is installed in the through groove (10), a plane (12) is provided on one end of the long diameter of the cam (11), and a locking mechanism is provided on one side of the knife seat (1), the locking mechanism allows the second clamping seat (4) to rotate close to the first clamping seat (3) and form a fixed clamping for the rotary tiller (5), after the locking mechanism forms a position limit between the second clamping seat (4) and the first clamping seat (3), the cam (11) in each knife clamping mechanism rotates until the plane (12) and the C-shaped frame (9) are aligned. When the vertical plate of the C-shaped frame (9) contacts the vertical plate, the C-shaped frame (9) can press the rotary blade (5) onto the second clamping seat (4); when the cam (11) rotates to the plane (12) and separates from the vertical plate of the C-shaped frame (9), the rotary blade (5) can enter the through groove (8) for removal; the locking mechanism comprises a locking seat (13) fixed on the rotating shaft, a second square groove (14) matching the rotating shaft is provided in the locking seat (13), a rotatable locking disk (15) is installed on the outer periphery of the locking seat (13), a plurality of locking rods (16) arranged circumferentially are provided on the locking disk (15), each locking rod (16) is arranged corresponding to the second clamping seat (4), a first inclined surface (17) is provided at the end of the locking rod (16), and the second clamping seat (4) is close to the locking disk ( A second inclined surface (18) is provided on the side surface of the locking plate (15), and the first inclined surface (17) and the second inclined surface (18) are arranged in parallel. When the locking plate (15) rotates relative to the locking seat (13), the first inclined surface (17) moves close to the second inclined surface (18) and presses the second clamping seat (4) onto the first clamping seat (3). A movable plug post (19) is also installed between the locking plate (15) and the locking seat (13). When the locking rod (16) presses the second clamping seat (4) onto the first clamping seat (3), the plug post (19) can limit the rotation of the locking plate (15) relative to the locking seat (13). After the plug post (19) releases the rotation limit of the locking plate (15), the locking plate (15) is rotated to separate the first inclined surface (17) from the second inclined surface (18).When the locking disk (15) rotates to a position where the second clamping seat (4) is located between adjacent locking rods (16), the second clamping seat (4) can be rotated and separated from the first clamping seat (3), thereby realizing the removal of the rotary tiller (5) in all the tool clamping mechanisms on the tool holder (1).

2. The rotary tiller cutter disc with easy-to-replace cutters according to claim 1, characterized in that: An adjusting handle (20) is mounted on the cam (11), and the adjusting handle (20) can drive the cam (11) to rotate. A shallow groove (21) connected to the through groove (10) is also provided in the first clamping seat (3). When the plane (12) of the cam (11) rotates to contact the vertical plate of the C-shaped frame (9), the adjusting handle (20) is located in the shallow groove (21).

3. The rotary tiller blade with easy-to-replace blades according to claim 1, characterized in that: A convex edge (22) is provided at the end of the second clamping seat (4), the second inclined surface (18) is located at the outer side of the convex edge (22), a limiting block (23) is provided on the side of the convex edge (22) away from the rotating shaft, and a limiting groove (24) matching with the limiting block (23) is provided on the side of the locking rod (16). When the limiting block (23) is located in the limiting groove (24), the locking rod (16) presses the second clamping seat (4) to be positioned on the first clamping seat (3).

4. The rotary tiller blade with easy-to-replace blades according to claim 1, characterized in that: A limiting column (25) is provided on the side of the knife seat (1) close to the second clamping seat (4), and a limiting hole (26) matching with the limiting column (25) is opened on the second clamping seat (4). When the limiting column (25) is located in the limiting hole (26), the second clamping seat (4) and the first clamping seat (3) can limit the torsion of each other.

5. The rotary tiller blade with easy-to-replace blades according to claim 1, characterized in that: The locking seat (13) is provided with two annular plates (27) arranged side by side, the locking disc (15) is located between the two annular plates (27), and bearings are provided between the end surface of the locking disc (15) and the annular plates (27) on both sides.

6. The rotary tiller blade with easy-to-replace blades according to claim 5, characterized in that: A through hole is provided between the circular plate (27) and the locking disk (15) of the locking seat (13), and the plug post (19) is located in the through hole. A pull ring (28) is provided at one end of the plug post (19), and a spring (29) is sleeved on the outer circumference of the plug post (19) between the pull ring (28) and the circular plate (27). A rotatable clamping column (30) is hingedly installed on the other end of the plug post (19) extending out of the through hole. The spring (29) always has a tendency to move the clamping column (30) closer to the circular plate (27). The length of the clamping column (30) is greater than the diameter of the through hole. When the clamping column (30) is perpendicular to the plug post (19), the plug post (19) can be locked in the through hole between the circular plate (27) and the locking disk (15). When the clamping column (30) is rotated to the same axial position as the plug post (19), the plug post (19) can drive the clamping column (30) to move out of the through hole.

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