Revolving cultivator with easily replaceable tools

Abstract

The utility model discloses a rotary cultivator tool disc of easy replacement tool, including the tool seat of fixed on the rotating shaft, the first square groove of being cooperated with the rotating shaft is set up in the central position of tool seat, and the periphery of tool seat is equipped with the tool clamping mechanism of arranging in circle a plurality of, each tool clamping mechanism includes the first clamping seat of fixed on tool seat, the second clamping seat is hinged and installed to the end of first clamping seat away from tool seat, and the rotary cultivator is installed between first clamping seat and second clamping seat.

Description

Technical Field

[0001] This invention relates to the field of rotary tillage blade technology, specifically to a rotary tiller blade disc that is easy to replace. Background Technology

[0002] The rotary tiller's cutterhead is the component that mounts the blades. It is typically made of cast iron or steel plate and is powered by the tractor engine. This power is transmitted to the cutterhead via a reducer and drive shaft, causing it to rotate. The cutterhead is equipped with several curved blades that cut and turn the soil during rotation, achieving the purposes of loosening the soil, improving soil structure, and removing weeds. Currently, the installation of blades on the cutterhead generally involves drilling holes in the blades and using through bolts for fastening. Drilling holes in the blades reduces their strength, and the interaction force between the drilled holes and the bolts during rotation significantly reduces the blades' lifespan. Furthermore, the bolted connection method makes blade disassembly and replacement relatively complex, resulting in low overall blade replacement efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a rotary tiller cutter head that is easy to replace blades. It uses a clamping mechanism to replace the traditional bolt connection, eliminating the need for holes on the blades, extending the service life of the blades, and improving the efficiency of blade replacement, thus solving the problems in the prior art.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: a rotary tiller blade disc that is easy to replace, including a blade holder fixed on a rotating shaft, a first square groove that mates with the rotating shaft is opened at the center of the blade holder, and a plurality of blade clamping mechanisms arranged circumferentially on the outer periphery of the blade holder, each blade clamping mechanism including a first clamping seat fixed on the blade holder, a second clamping seat hinged to the end of the first clamping seat away from the blade holder, a rotary tiller blade installed between the first clamping seat and the second clamping seat, wherein the end of the rotary tiller blade is provided with a folded edge, a positioning groove that mates with the folded edge is opened on the second clamping seat, and a positioning groove that mates with the folded edge is opened on the first clamping seat. A through slot allows the rotary tiller blades to move in and out. A C-shaped frame is installed within the through slot. The C-shaped frame includes a vertical plate and side plates at both ends of the vertical plate. The vertical plate mates with the through slot, and the side plates are located outside the first clamping seat. A through slot communicating with the through slot is also provided within the first clamping seat. A rotatable cam is installed within the through slot. One end of the cam has a flat surface. A locking mechanism is located on one side of the blade holder. This locking mechanism allows the second clamping seat to rotate closer to the first clamping seat, thus securing the rotary tiller blades. After the locking mechanism limits the position between the second and first clamping seats, the cams in each blade clamping mechanism rotate until the flat surface aligns with the C-shaped frame. When the vertical plates of the C-frame come into contact, the C-frame can press the rotary tiller blades onto the second clamping seat. When the cam rotates to the plane and separates from the vertical plate of the C-frame, the rotary tiller blades can enter the through groove for removal. The locking mechanism includes a locking seat fixed on the rotating shaft. The locking seat has a second square groove that mates with the rotating shaft. A rotatable locking disc is installed on the outer periphery of the locking seat. The locking disc has several locking rods arranged circumferentially. Each locking rod is arranged correspondingly to the second clamping seat. A first inclined surface is provided at the end of the locking rod. A second inclined surface is provided on the side of the second clamping seat near the locking disc. The first inclined surface and the second inclined surface are flush. In this arrangement, when the locking disc rotates relative to the locking seat, the first inclined surface moves closer to the second inclined surface and presses the second clamping seat against the first clamping seat. A movable insert is also installed between the locking disc and the locking seat. When the locking rod presses the second clamping seat against the first clamping seat, the insert restricts the rotation of the locking disc relative to the locking seat. After the insert releases the rotation limit of the locking disc, rotating the locking disc separates the first and second inclined surfaces. When the locking disc rotates to the position where the second clamping seat is between adjacent locking rods, the second clamping seat can rotate and separate from the first clamping seat, thus removing the rotary tillers from all the tool clamping mechanisms on the tool holder. An adjusting handle is installed on the cam, which drives the cam to rotate. A shallow groove communicating with the through slot is also provided in the first clamping seat. When the plane of the cam rotates to contact the vertical plate of the C-shaped frame, the adjusting handle is located in the shallow groove. The end of the second clamping seat is provided with a protruding edge, and the second inclined surface is located outside the protruding edge. A limiting block is provided on the side of the protruding edge away from the rotating shaft. A limiting groove that cooperates with the limiting block is opened on the side of the locking rod. When the limiting block is located in the limiting groove, the locking rod presses the second clamping seat and positions it on the first clamping seat.A limiting post is provided on the side of the tool holder near the second clamping seat. The second clamping seat has a limiting hole that mates with the limiting post. When the limiting post is located within the limiting hole, the second clamping seat and the first clamping seat can mutually limit each other's torsional deviation. The locking seat has two annular plates arranged side by side, and a locking disc is located between the two annular plates. Bearings are provided between the end face of the locking disc and the annular plates on both sides. A through hole is provided between the annular plate and the locking disc of the locking seat. The insert is fitted inside the through hole. One end of the insert is provided with a pull ring. A spring is fitted around the outer periphery of the insert between the pull ring and the annular plate. The other end of the insert extending out of the through hole is hinged to a rotatable locking pin. The spring always tends to move the locking pin closer to the annular plate. The length of the locking pin is greater than the diameter of the through hole. When the locking pin is perpendicular to the insert, the insert can be locked in the through hole between the annular plate and the locking disc. When the locking pin rotates to a position on the same axis as the insert, the insert can drive the locking pin to move out of the through hole.

[0005] The positive effects of this invention are as follows: The rotary tiller blade holder of this invention, which allows for easy blade replacement, features several blade clamping mechanisms arranged circumferentially around the blade holder. Each clamping mechanism includes a first clamping seat and a second clamping seat. A locking mechanism allows the second clamping seat to rotate closer to the first clamping seat, thus securing the rotary tiller blades. The cam and adjusting handle allow the user to easily control the C-frame's clamping and releasing of the blades, enabling the removal and replacement of individual blades on the blade holder. The locking disc and locking rod allow the user to remove and replace all blades on the blade holder simultaneously with a simple rotation. Operators can choose different quick replacement methods based on the actual usage of the blades. Through the innovative blade clamping and locking mechanism design, users can quickly install and remove blades without using traditional fasteners such as bolts. This change not only simplifies the operation process but also significantly reduces the time required to replace blades, improving agricultural production efficiency. Since the tool no longer needs to be drilled to fit the bolt, the weakening effect of drilling on the tool's strength 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 tool's service life. Attached Figure Description

[0006] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0007] Figure 2 This is the front view of the present invention;

[0008] Figure 3 yes Figure 2 The left view;

[0009] Figure 4 yes Figure 2 The right view;

[0010] Figure 5 yes Figure 2 Top view;

[0011] Figure 6 This is a schematic diagram of a tool clamping mechanism;

[0012] Figure 7 yes Figure 6 Left view of the middle structure;

[0013] Figure 8 yes Figure 6 An enlarged view of the sectional view along the AA direction;

[0014] Figure 9 yes Figure 7 An enlarged view of the BB-axis sectional view;

[0015] Figure 10 This is a schematic diagram of the locking mechanism;

[0016] Figure 11 yes Figure 2 An enlarged view of the sectional view along the CC direction;

[0017] Figure 12 yes Figure 2 An enlarged view of the DD-direction sectional view;

[0018] Figure 13 This is a schematic diagram of a structure with a movable insert pin between the locking seat and the locking disc;

[0019] Figure 14 yes Figure 13 A schematic diagram showing the state of the insert post removed from the through hole;

[0020] Figure 15 This is a schematic diagram showing the state of a rotary tiller blade removed from a tool clamping mechanism;

[0021] Figure 16 This is a schematic diagram showing the state of the rotary tillage blades removed from all blade clamping mechanisms. Detailed Implementation

[0022] The rotary tiller cutterhead of this invention is easy to replace with blades, such as... Figure 1-5 As shown, it includes a tool holder 1 fixed on a rotating shaft. A first square groove 2 that mates with the rotating shaft is provided at the center 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. The tool holder 1 can be fixedly installed at a designated position in the length direction of the rotating shaft by bolts or other connecting parts.

[0023] To achieve the clamping and fixing of the cutting tool, several cutting tool clamping mechanisms are arranged circumferentially on the outer periphery of the tool holder 1, such as... Figure 6-9As shown, each tool clamping mechanism includes a first clamping seat 3 fixed on the tool holder 1. A second clamping seat 4 is hinged to the end of the first clamping seat 3 away from the tool holder 1. 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 closer to the first clamping seat 3, it can clamp and fix the rotary tiller 5. When the second clamping seat 4 rotates away from the first clamping seat 3, it can quickly replace the rotary tiller 5.

[0024] The rotary tiller blade 5 has a folded edge 6 at its end, and the second clamping seat 4 has a positioning groove 7 that matches the folded edge 6, so as to position and insert the rotary tiller blade 5 into the second clamping seat 4. To facilitate the individual assembly and disassembly of the rotary tiller blade 5 in the blade clamping mechanism, the first clamping seat 3 has a through groove 8 that allows the rotary tiller blade 5 to enter and exit. 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. The vertical plate matches the through groove 8, and the side plates are located outside the first clamping seat 3, which can close the two sides of the through groove 8 to prevent soil clods or other impurities raised during the rotation of the blade from entering the through groove 8 and affecting the normal movement of the C-shaped frame 9.

[0025] A through groove 10 communicating with 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 flat surface 12 is provided on one of the long diameter ends of the cam 11. When the cam 11 rotates, it will contact the vertical plate of the C-shaped frame 9. During the rotation of the cam 11, its long diameter end will push the C-shaped frame 9 to move closer to the rotary tiller 5. When the flat surface 12 on the cam 11 contacts the rotary tiller 5, the C-shaped frame 9 will press the rotary tiller 5 tightly on the second clamping seat 4. Since the flat surface 12 is in contact with the inner side of the vertical plate of the C-shaped frame 9, the cam 11 will always maintain the pressing state on the rotary tiller 5 without external force causing it to rotate.

[0026] A locking mechanism is provided on one side of the blade holder 1. The locking mechanism allows the second clamping seat 4 to rotate and approach the first clamping seat 3 to form a fixed clamping of the rotary tiller 5. After the locking mechanism is unlocked, the second clamping seat 4 can rotate away from the first clamping seat 3, so that all the rotary tillers 5 in the blade clamping mechanism 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 tiller 5.

[0027] The function of the C-shaped frame 9 and the cam 11 is to allow for the individual assembly and disassembly of the rotary tiller 5 in any tool clamping mechanism. After the locking mechanism limits the position between the second clamping seat 4 and the first clamping seat 3, when the cam 11 in each tool clamping mechanism rotates to the point where the plane 12 contacts the vertical plate of the C-shaped frame 9, the C-shaped frame 9 can press the rotary tiller 5 onto the second clamping seat 4. When the cam 11 rotates to the point where the plane 12 separates from the vertical plate of the C-shaped frame 9, the rotary tiller 5 can enter the through groove 8 for disassembly.

[0028] To achieve the locking mechanism's 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, such as... Figure 10-12 As shown, the locking mechanism includes a locking seat 13 fixed on the rotating shaft. The locking seat 13 has a second square groove 14 that mates with the rotating shaft. The locking seat 13 can be fixedly installed on the square rotating shaft by bolts or other connecting parts and rotates synchronously with the rotating shaft.

[0029] A rotatable locking disc 15 is installed on the outer periphery of the locking seat 13. The locking disc 15 is provided with a plurality of locking rods 16 arranged in a circle. Each locking rod 16 is arranged corresponding to the second clamping seat 4. When the locking disc 15 rotates, the locking rods 16 can rotate the second clamping seat 4 toward the first clamping seat 3 and maintain the clamping and fixing of the rotary tiller 5. When unlocking is required, the locking rods 16 can be rotated and separated from the second clamping seat 4.

[0030] 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 near the locking disc 15. The first inclined surface 17 and the second inclined surface 18 are arranged parallel to each other. When the locking disc 15 rotates relative to the locking seat 13, the first inclined surface 17 moves closer to the second inclined surface 18 and presses the second clamping seat 4 onto the first clamping seat 3.

[0031] To maintain the second clamping seat 4 pressed against the first clamping seat 3, a movable insert 19 is installed between the locking disc 15 and the locking seat 13. When the locking rod 16 presses the second clamping seat 4 against the first clamping seat 3, the insert 19 can restrict the rotation of the locking disc 15 relative to the locking seat 13. After the insert 19 releases the rotation limit of the locking disc 15, the locking disc 15 is rotated to separate the first inclined surface 17 from the second inclined surface 18. When the locking disc 15 rotates to the position where the second clamping seat 4 is located between the adjacent locking rods 16, the second clamping seat 4 can rotate and separate from the first clamping seat 3, thereby removing the rotary tillage blades 5 in all the tool clamping mechanisms on the tool holder 1.

[0032] The rotary tiller blades of this invention have two methods for replacing the rotary tiller blades 5. The first method is to replace all the rotary tiller blades 5 on the blade disc at the same time, and the second method is to replace the rotary tiller blades 5 on a specific blade clamping mechanism individually. When rotary tilling different types of soil or planting different kinds of crops, different blades are required, which necessitates a unified replacement method. When it is necessary to replace a worn blade, the individual replacement method can be used to improve blade replacement efficiency. While ensuring normal rotary tillage operation, it can also extend the common service life of all blades on the blade disc.

[0033] When replacing all rotary tillage blades 5 on the cutterhead, the following steps are required: First, pull out the insert 19 between the locking disc 15 and the locking seat 13. After losing the rotational locking limit, ... Figure 4 Rotate the locking disc 15 clockwise in the direction shown. During the rotation of the locking disc 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 against the first clamping seat 3. When the locking disc 15 rotates to the position where the second clamping seat 4 is located in the gap between the two adjacent locking rods 16, the second clamping seat 4 can rotate away from the first clamping seat 3, and all the rotary tillage blades 5 on the cutter head lose their limiting clamping and can be disassembled uniformly.

[0034] When replacing a rotary tiller blade 5 on a specific tool clamping mechanism on the cutter head, it is done under the premise that the locking mechanism limits the position between the second clamping seat 4 and the first clamping seat 3. The required operation is as follows: The operator 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-shaped frame 9. After losing the limit, the C-shaped frame 9 can enter the through groove 8. At this time, the C-shaped frame 9 no longer forms a pressing limit on the rotary tiller blade 5. The rotary tiller blade 5 and its end flange 6 can enter the through groove 8 and the rotary tiller blade 5 can be pulled out from the through groove 8 to achieve individual disassembly of the tool.

[0035] After the old blades are disassembled separately, new blades are placed into the through slot 8. Then, the rotary tiller blade 5 is moved closer to the second clamping seat 4 so that the folded edge 6 of the rotary tiller blade 5 enters the positioning slot 7, thus achieving the positioning and installation of the blade. After that, the cam 11 is rotated so that the plane 12 at one end of its long axis contacts the vertical plate of the C-shaped frame 9 again. During this process, the vertical plate of the C-shaped frame 9 will gradually move closer to the rotary tiller blade 5 and form a clamping and pressing grip on the rotary tiller blade 5.

[0036] After replacing the disassembled blades with new ones, rotate all the second clamping seats 4 closer to the first clamping seat 3, then rotate the locking disc 15 in the opposite direction so that the first inclined surface 17 and the second inclined surface 18 are close to each other. The locking rod 16 presses the second clamping seat 4 onto the first clamping seat 3. Insert the insert 19 back into the space between the locking disc 15 and the locking seat 13 to form a rotation limit. Finally, rotate and adjust the cam 11 at the position of each blade clamping mechanism to press and clamp the rotary tiller blade 5 again.

[0037] During rotary tillage, the shaft can rotate in both forward and reverse directions. Figure 4When rotating counterclockwise in the direction shown, i.e., in reverse, using the cutterhead installation method illustrated, the locking rod 16 on the locking mechanism rotates counterclockwise along with the rotating shaft, and the rotary tiller blades 5 in contact with the soil also rotate counterclockwise. During rotary tillage, the rotary tiller blades 5 will experience resistance in the opposite direction, which tends to cause the rotary tiller blades 5 and the second clamping seat 4 to rotate clockwise. Under the aforementioned relative rotation, the first inclined surface 17 and the second inclined surface 18 will gradually approach each other, meaning the locking rod 16 will press the second clamping seat 4 tighter and tighter, thus preventing loosening during rotary tillage. When the rotating shaft rotates clockwise, to ensure that the locking rod 16 and the second clamping seat 4 also press tighter and tighter, unlike the cutterhead installation method illustrated, the cutterhead needs to be rotated 180 degrees and installed on the rotating shaft. The cutterhead installation method can be adaptively selected according to the rotation direction of the rotating shaft, thereby ensuring stable clamping of the blades during rotary tillage.

[0038] 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. 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-shaped frame 9, the adjustment handle 20 is located in the shallow groove 21.

[0039] When the cam 11 is in contact with the vertical plate of the C-frame 9 at one end of its long axis, and the C-frame 9 clamps the rotary tiller 5 on the second clamping seat 4, the plane 12 and the side of the vertical plate form a rotation limit. Without external force interfering with the rotation of the cam 11, the clamping state of the rotary tiller 5 will be maintained. In this state, the adjustment handle 20 of the cam 11 is located in the shallow groove 21 and is protected by the shallow groove 21. During the rotary tillage operation, it will not be affected by soil clods or other debris, and can stably maintain the clamping state of the blade.

[0040] When it is necessary to disassemble the tool, the cam 11 needs to be rotated. An inclined surface can also be provided on the upper end of the adjusting handle 20 so that the operator can insert his / her fingers into the shallow groove 21 to pry 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.

[0041] Furthermore, in order to achieve stable positioning of the second clamping seat 4, the end of the second clamping seat 4 is provided with a protruding edge 22, and the second inclined surface 18 is located outside 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 near the rotating shaft can abut against the surface of the square rotating shaft, thereby achieving stable positioning support for the second clamping seat 4.

[0042] To prevent the locking rod 16 from rotating too much when adjusting the locking disc 15, which would cause it to pass over the second clamping seat 4 and fail to effectively limit the second clamping seat 4, a limiting block 23 is provided on the side of the protruding edge 22 away from the rotating shaft. A limiting groove 24 that cooperates 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 and positions the second clamping seat 4 on the first clamping seat 3. The setting of the limiting block 23 can effectively prevent the locking rod 16 from rotating and disengaging from the second clamping seat 4.

[0043] The second clamping seat 4 and the first clamping seat 3 are hinged together by a rotating shaft. The locking rod 16 presses and limits the second clamping seat 4 by mutual compression between two inclined surfaces. During rotary tillage, the second clamping seat 4 with the above structure is prone to twisting relative to the first clamping seat 3 in the inclined direction during rotation, which reduces the service life of both components. To avoid the above situation, a limiting post 25 is provided on the side of the tool holder 1 near the second clamping seat 4. The second clamping seat 4 has a limiting hole 26 that cooperates with the limiting post 25. When the limiting post 25 is located in the limiting hole 26, the locking mechanism presses the second clamping seat 4 against the first clamping seat 3, and at the same time, the second clamping seat 4 and the first clamping seat 3 can mutually limit the twisting.

[0044] Furthermore, in order to facilitate the installation of the locking disc 15 on the locking seat 13 and to realize the rotational adjustment of the locking disc 15 relative to the locking seat 13, the locking seat 13 is provided with two annular plates 27 arranged side by side, the locking disc 15 is an annular post, and is located between the two annular plates 27. Bearings are provided between the end face of the locking disc 15 and the annular plates 27 on both sides, so that the rotation of the locking disc 15 relative to the locking seat 13 can be realized.

[0045] Furthermore, to facilitate stable positioning and quick assembly / disassembly of the insert 19 between the locking disc 15 and the locking seat 13, such as... Figure 13 and Figure 14 As shown, a through hole is provided between the annular plate 27 and the locking disc 15 of the locking seat 13. When the insert pin 19 is located in the through hole, the locking disc 15 and the locking seat 13 are locked relative to each other and cannot be rotated or adjusted. That is, the locking mechanism maintains the pressing and limiting position of the second clamping seat 4. When the insert pin 19 is removed from the through hole, the locking disc 15 can rotate relative to the locking seat 13. Thus, the limiting position of the second clamping seat 4 can be released by rotating the locking mechanism, and the tool can be replaced uniformly.

[0046] One end of the insert post 19 is provided with a pull ring 28. A spring 29 is fitted around the outer periphery of the insert post 19 between the pull ring 28 and the annular plate 27. The other end of the insert post 19 extending out of the through hole is hinged to a rotatable locking post 30. The spring 29 always tends to move the locking post 30 closer to the annular plate 27. The length of the locking post 30 is greater than the diameter of the through hole. When the locking post 30 is perpendicular to the insert post 19, the insert post 19 can be locked in the through hole between the annular plate 27 and the locking disc 15. When the locking post 30 rotates to a position on the same axis as the insert post 19, the insert post 19 can drive the locking post 30 to move out of the through hole.

[0047] When it is necessary to pull the insert pin 19 out of the through hole in the locking disc 15 and locking seat 13, the operator presses the pull ring 28 to overcome the elastic force of the spring 29, causing the locking pin 30, which is perpendicular to the insert pin 19, to move away from the position of the annular plate 27. The locking pin 30 is then manually rotated until it is on the same axis as the insert pin 19, allowing the insert pin 19 to be pulled out of the through hole. When it is necessary to use the insert pin 19 to rotate and lock the locking disc 15 and locking seat 13, the locking pin 30 must be inserted into the through hole when it is on the same axis as the insert pin 19, compressing the spring 29 so that the locking pin 30 extends out of the through hole. Then, the locking pin 30 is manually rotated until it is perpendicular to the insert pin 19. Under the tension of the spring 29, the locking pin 30 is pressed against the end face of the annular plate 27, allowing the insert pin 19 to remain stably in the through hole between the locking disc 15 and locking seat 13, thereby achieving rotational locking between the locking disc 15 and locking seat 13.

[0048] The rotary tiller blade changer described in this invention features an innovative blade clamping and locking mechanism, allowing users to quickly install and remove blades without the need for traditional fasteners such as bolts. This change not only simplifies the operation process, shortens the time required to change blades, and improves agricultural production efficiency, but also avoids weakening the blades due to the elimination of holes in the blades. Furthermore, the clamping mechanism design reduces the additional stress on the blades during rotation, thus significantly extending their service life. In addition, this invention provides multiple quick-change methods for operators to choose from, meeting the needs of different usage scenarios.

[0049] The flexible design of the blade clamping and locking mechanisms allows for adaptation to different sizes and types of rotary tillers, meeting diverse needs in agricultural production. The various limiting devices are relatively simple in structure and easy to operate, eliminating the need for specialized tools or skills when changing blades or performing routine maintenance, thus reducing maintenance costs. The integrated blade disc device not only significantly improves blade replacement efficiency and service life but also enhances operational convenience and safety, further reducing maintenance costs. It has broad application prospects and significant economic benefits.

[0050] The technical solutions of this invention are not limited to the embodiments described herein. All technical contents not described in detail herein are well-known technologies.

Claims

1. A rotary tiller cutter head with easily replaceable blades, characterized in that: The device includes a tool holder (1) fixed on a rotating shaft. A first square groove (2) that mates with the rotating shaft is provided at the center of the tool holder (1). Several tool clamping mechanisms are arranged circumferentially around the outer periphery of the tool holder (1). Each tool clamping mechanism includes a first clamping seat (3) fixed on the tool holder (1). A second clamping seat (4) is hinged to the end of the first clamping seat (3) away from the tool holder (1). A rotary tiller (5) is installed between the first clamping seat (3) and the second clamping seat (4). The end of the rotary tiller (5) is provided with a folded edge (6). A positioning groove (7) that mates with the folded edge (6) is provided on the second clamping seat (4). A through groove (8) that allows the rotary tiller (5) to enter and exit is provided on the first clamping seat (3). A C is installed in the through groove (8). The C-frame (9) includes a vertical plate and side plates at both ends of the vertical plate. The vertical plate cooperates with the through slot (8), and the side plates are located outside the first clamping seat (3). A through slot (10) communicating with the through slot (8) is also provided in the first clamping seat (3). A rotatable cam (11) is installed in the through slot (10). A plane (12) is provided on one end of the long axis of the cam (11). A locking mechanism is provided on one side of the tool holder (1). The locking mechanism allows the second clamping seat (4) to rotate and approach the first clamping seat (3) to form a fixed clamping of the rotary tiller (5). After the locking mechanism limits the position between the second clamping seat (4) and the first clamping seat (3), the cam (11) in each tool clamping mechanism rotates to the plane (12) and the C-frame (9). When the vertical plates of the C-frame (9) come into contact, the C-frame (9) can press the rotary tiller (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-frame (9), the rotary tiller (5) can enter the through groove (8) for removal. The locking mechanism includes a locking seat (13) fixed on the rotating shaft. The locking seat (13) has a second square groove (14) that cooperates with the rotating shaft. A rotatable locking disc (15) is installed on the outer periphery of the locking seat (13). The locking disc (15) has several locking rods (16) arranged in a circle. Each locking rod (16) is arranged correspondingly to the second clamping seat (4). A first inclined surface (17) is provided at the end of the locking rod (16). The second clamping seat (4) is close to the locking disc (15). A second inclined surface (18) is provided on the side of the locking disc (15). The first inclined surface (17) and the second inclined surface (18) are arranged parallel to each other. When the locking disc (15) rotates relative to the locking seat (13), the first inclined surface (17) moves closer to the second inclined surface (18) and presses the second clamping seat (4) against the first clamping seat (3). A movable insert (19) is also installed between the locking disc (15) and the locking seat (13). When the locking rod (16) presses the second clamping seat (4) against the first clamping seat (3), the insert (19) can restrict the rotation of the locking disc (15) relative to the locking seat (13). After the insert (19) releases the rotation limit of the locking disc (15), the locking disc (15) is rotated to separate the first inclined surface (17) from the second inclined surface (18).When the locking disc (15) rotates to the position where the second clamping seat (4) is located between the adjacent locking rods (16), the second clamping seat (4) can rotate and separate from the first clamping seat (3), thereby removing the rotary tillage blades (5) from all the tool clamping mechanisms on the tool holder (1).

2. The rotary tiller cutterhead with easily replaceable blades according to claim 1, characterized in that: An adjustment handle (20) is installed on the cam (11). 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-shaped frame (9), the adjustment handle (20) is located in the shallow groove (21).

3. The rotary tiller cutterhead with easily replaceable blades according to claim 1, characterized in that: The end of the second clamping seat (4) is provided with a protruding edge (22), and the second inclined surface (18) is located outside the protruding edge (22). A limiting block (23) is provided on the side of the protruding edge (22) away from the rotating shaft. A limiting groove (24) that cooperates with the limiting block (23) is opened 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) and positions it on the first clamping seat (3).

4. The rotary tiller cutterhead with easily replaceable blades according to claim 1, characterized in that: The tool holder (1) has a limiting post (25) on the side near the second clamping seat (4). The second clamping seat (4) has a limiting hole (26) that cooperates with the limiting post (25). When the limiting post (25) is located in the limiting hole (26), the second clamping seat (4) and the first clamping seat (3) can mutually restrict each other's torsion.

5. A rotary tiller cutterhead with easily replaceable blades according to claim 1, characterized in that: The locking seat (13) is provided with two annular plates (27) arranged side by side, and the locking disc (15) is located between the two annular plates (27). Bearings are provided between the end face of the locking disc (15) and the annular plates (27) on both sides.

6. The rotary tiller cutterhead with easily replaceable blades according to claim 5, characterized in that: A through hole is provided between the annular plate (27) and the locking disc (15) of the locking seat (13). The insert (19) is located in the through hole. One end of the insert (19) is provided with a pull ring (28). A spring (29) is fitted around the insert (19) between the pull ring (28) and the annular plate (27). The other end of the insert (19) extending out of the through hole is hinged to a rotatable locking pin (30). The spring (29) always tends to move the locking pin (30) closer to the annular plate (27). The length of the locking pin (30) is greater than the diameter of the through hole. When the locking pin (30) is perpendicular to the insert (19), the insert (19) can be locked in the through hole between the annular plate (27) and the locking disc (15). When the locking pin (30) rotates to a position on the same axis as the insert (19), the insert (19) can drive the locking pin (30) to move out of the through hole.

Images