A three-station cyclic rotary joint

Abstract

The application discloses a three-station cyclic rotation grafting device and relates to the technical field of grafting equipment. The device comprises a workbench, symmetrical anvil wood clamping and rotating mechanisms and scion wood clamping and rotating mechanisms are arranged on the upper portion of the workbench, and a conveying table is arranged on the side of the workbench close to the anvil wood clamping and rotating mechanisms. The device adopts the production mode that three anvil wood clamping and rotating mechanisms and scion wood clamping and rotating mechanisms continuously rotate grafting, realizes continuous grafting production, greatly improves grafting efficiency, is simple in structure, is composed of low-cost simple components and non-standard parts with low processing difficulty, greatly reduces the production cost of the device, and adopts full automation to simplify operation.

Description

Technical Field

[0001] This invention relates to the field of grafting equipment technology, specifically a three-station cyclic rotation grafting device. Background Technology

[0002] Grafting is a seedling cultivation method that improves plant resistance, increases crop yield, and enhances commercial quality. During grafting, the cambium layers of the scion and rootstock should be in close contact to ensure the scion's survival. The grafted branch or bud is called the scion, and the plant being grafted is called the rootstock. In production practice, grafting is of great significance for improving economic value and is also important for the propagation of some non-seed-producing fruit trees. Grafting can maintain the superior traits of the scion variety while utilizing the beneficial characteristics of the rootstock, achieving earlier fruiting, enhanced cold resistance, drought resistance, and resistance to diseases and pests.

[0003] Existing grafting methods are divided into manual grafting and grafting machine grafting. Manual grafting has low productivity, while existing grafting machines have high productivity, but the equipment is expensive and relatively complicated to operate.

[0004] Therefore, we have made improvements to this and proposed a three-station cyclic rotation coupling device. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a three-station cyclic rotary grafting device, which solves the problems of high equipment price, complex grafting operation, and low grafting efficiency in existing technologies.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a three-station circulating rotation grafting device, including a worktable, with a rootstock clamping and rotating mechanism and a scion clamping and rotating mechanism symmetrically arranged on the upper part of the worktable, and a conveyor table arranged on the side of the worktable near the rootstock clamping and rotating mechanism.

[0007] The rootstock clamping and rotating mechanism includes a turntable A, rootstock clamping components, and rootstock cutting accessories. A stepper motor is fixedly installed at the bottom of the turntable A and is fixedly installed in the inner cavity of the workbench. There are three rootstock clamping components, which are evenly arranged on the upper surface of the turntable A along the axis of the turntable A. The rootstock cutting accessories are installed on the upper part of the turntable A through a bracket A, which is fixedly installed on the workbench. The rootstock cutting accessories can cooperate with the rootstock clamping components to cut the rootstock.

[0008] The aforementioned wood clamping and rotating mechanism includes a turntable B, wood clamping components, and wood cutting accessories. A stepper motor is fixedly installed at the bottom of the turntable B and is fixedly installed in the inner cavity of the worktable. There are three wood clamping components, which are evenly arranged on the upper surface of the turntable B along the axis of the turntable B. The wood cutting accessories are set on one side of the turntable B through a bracket B, which is fixedly installed on the worktable. The wood cutting accessories can cooperate with the wood clamping components to cut the wood.

[0009] The height of turntable A is lower than the height of turntable B. The anvil cutting accessory is located at the top of the line connecting the centers of turntables A and B. The anvil clamping component and the scion clamping component can be aligned with the line connecting the centers of turntables A and B.

[0010] As a preferred embodiment, the rootstock clamping component includes a pneumatic slide, a pneumatic slider, a pneumatic clamp A, and an air pump A. The pneumatic slide is fixedly mounted on the turntable A, and the pneumatic slider is slidably mounted on the pneumatic slide along the radial direction of the turntable A. There are two pneumatic clamps A, which are respectively located at the upper front end of the pneumatic slider and at the front end of the pneumatic slider. The air pump A is located in the middle of the turntable A.

[0011] The air pump A is connected to the pneumatic slide and the pneumatic clamp A via pipes.

[0012] As a preferred embodiment, the sapwood clamping component includes a pneumatic inclined slide block, a pneumatic inclined slider, a pneumatic clamp B, and an air pump B. The pneumatic inclined slide block is fixedly mounted on the turntable B, the pneumatic inclined slider is longitudinally inclined and slidably mounted on the pneumatic inclined slide block, the pneumatic clamp B is located at the front end of the pneumatic inclined slider, and the air pump B is located in the middle of the turntable B.

[0013] The air pump B is connected to the pneumatic inclined slide and the pneumatic clamp B via pipelines.

[0014] As a preferred embodiment, the bracket A is fixedly equipped with a hydraulic cylinder A, the piston rod of the hydraulic cylinder A is fixedly equipped with a fixing block A, the lower part of the fixing block A is rotatably equipped with a pressing wheel, the pneumatic inclined slider can move to the lower part of the pressing wheel, and the pressing wheel is arranged opposite to the anvil cutting accessory.

[0015] As a preferred embodiment, the anvil cutting accessory includes a fixed base, a hydraulic cylinder B, a limiting wedge block, and a cutting blade A. The fixed base is fixedly mounted on the bracket A, the hydraulic cylinder B is fixedly mounted on the fixed base, the limiting wedge block is fixedly connected to the piston rod of the hydraulic cylinder B, and the cutting blade A is fixedly mounted on the lower front end of the limiting wedge block.

[0016] A limiting block A is fixedly provided at the end of the pneumatic clamp A located on the upper part of the pneumatic slider. There are two limiting blocks A, which are symmetrically arranged at the end of the clamp arm of the pneumatic clamp A. The walls of the two limiting blocks A facing each other have inclined surfaces. The inclined surfaces can cooperate with the limiting wedge block to separate the pneumatic clamp A on the upper part of the pneumatic slider and limit the head of the limiting wedge block to the upper surface of the pneumatic slider.

[0017] As a preferred embodiment, the wood cutting accessory includes a hydraulic cylinder C, a fixing block B, a mounting block, and a cutting blade B. The hydraulic cylinder C is fixedly mounted on the bracket B, the fixing block B is fixedly mounted on the piston rod of the hydraulic cylinder C, the mounting block is fixedly mounted on the lower part of the fixing block B, and the cutting blade B is fixedly mounted on the front end of the mounting block.

[0018] The front end of the cutter B is positioned facing the center of the turntable B. The cutter B includes an adjustment block and a blade. There are two adjustment blocks and two blades. The adjustment blocks are symmetrically arranged at the front end of the mounting block, with a gap between them. The two blades are respectively located on the upper part of the adjustment blocks.

[0019] As a preferred embodiment, the two blades are spaced apart, and the sidewalls of the two blades are inclined with blades, which are inclined toward the upper part of the blades.

[0020] As a preferred embodiment, the upper part of the adjustment block is symmetrically provided with threaded holes, and the upper part of the blade is symmetrically provided with adjustment holes. The distance between the blades of the two blades is adjusted by the threaded holes, adjustment holes and bolts.

[0021] As a preferred embodiment, the front end of the cutter B is provided with a bracket C, and the upper part of the bracket C is provided with a limiting block B, which is located at the lower part of the wood cutting accessory.

[0022] The present invention has the following beneficial effects:

[0023] The production method of continuous grafting by adopting three rootstock clamping and rotating mechanisms and scion clamping and rotating mechanisms enables continuous grafting production and greatly improves grafting efficiency.

[0024] In addition, the simple structure, made up of inexpensive parts and non-standard parts with low processing difficulty, greatly reduces the production cost of the equipment, and the fully automated operation simplifies the operation.

[0025] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a three-station cyclic rotary coupling device according to the present invention;

[0027] Figure 2 This invention relates to a three-station cyclic rotary grafting device with a rootstock clamping and rotating mechanism and a scion clamping and rotating mechanism.

[0028] Mechanism structure diagram;

[0029] Figure 3 This is a schematic diagram of the rootstock clamping and rotating mechanism of a three-station cyclic rotating grafting device according to the present invention.

[0030] Figure 4 for Figure 3 A magnified structural diagram of part A;

[0031] Figure 5 This is a schematic diagram of the scion clamping and rotating mechanism of a three-station cyclic rotating grafting device according to the present invention;

[0032] Figure 6 This is a schematic diagram of the scion cutting component of a three-station cyclic rotary grafting device according to the present invention;

[0033] Figure 7 for Figure 6 A magnified structural diagram of part B;

[0034] In the diagram, 1. Workbench; 2. Rootstock clamping and rotating mechanism; 3. Scion clamping and rotating mechanism; 4. Conveyor table; 5. Turntable A; 6. Rootstock clamping component; 7. Rootstock cutting accessory; 8. Support A; 9. Turntable B; 10. Scion clamping component; 11. Scion cutting accessory; 12. Support B; 13. Pneumatic slide; 14. Pneumatic slider; 15. Pneumatic clamp A; 16. Air pump A; 17. Pneumatic inclined slide; 18. Pneumatic inclined slider; 9. Pneumatic clamp B; 20. Air pump B; 21. Hydraulic cylinder A; 22. Fixing block A; 23. Downward pressing wheel; 24. Fixing seat; 25. Hydraulic cylinder B; 26. Limiting wedge block; 27. Cutter A; 28. Limiting block A; 29. ​​Hydraulic cylinder C; 30. Fixing block B; 31. Mounting block; 32. Cutter; 33. Adjusting block; 34. Cutter body; 35. Blade; 36. Adjusting hole; 37. Bracket C; 38. Limiting block B. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0037] For examples, please refer to Figures 1 to 7 The present invention provides a technical solution: a three-station circulating rotation grafting device, including a workbench 1, a rootstock clamping rotation mechanism 2 and a scion clamping rotation mechanism 3 symmetrically arranged on the upper part of the workbench 1, and a conveyor 4 arranged on the side of the workbench 1 near the rootstock clamping rotation mechanism 2.

[0038] The rootstock clamping and rotating mechanism 2 includes a turntable A5, a rootstock clamping component 6, and a rootstock cutting accessory 7. A stepper motor is fixedly installed at the bottom of the turntable A5 and is fixedly installed in the inner cavity of the workbench 1. There are three rootstock clamping components 6, which are evenly arranged on the upper surface of the turntable A5 along the axis of the turntable A5. The rootstock cutting accessory 7 is installed on the upper part of the turntable A5 through a bracket A8, which is fixedly installed on the workbench 1. The rootstock cutting accessory 7 can cooperate with the rootstock clamping component 6 to cut the rootstock.

[0039] The aforementioned log clamping and rotating mechanism 3 includes a turntable B9, log clamping components 10, and log cutting accessories 11. A stepper motor is fixedly installed at the bottom of the turntable B9 and is fixedly installed in the inner cavity of the worktable 1. There are three log clamping components 10, which are evenly arranged on the upper surface of the turntable B9 along the axis of the turntable B9. The log cutting accessories 11 are supported by a support...

[0040] The bracket B12 is located on one side of the turntable B9 and is fixedly mounted on the workbench 1. The wood cutting accessory 11 can cooperate with the wood clamping component 10 to cut the wood.

[0041] The height of turntable A5 is lower than the height of turntable B9. The rootstock cutting accessory 7 is located at the top of the line connecting the centers of turntable A5 and turntable B9. The rootstock clamping accessory 6 and the scion clamping accessory 10 can be aligned with the line connecting the centers of turntable A5 and turntable B9.

[0042] The rootstock clamping component 6 includes a pneumatic slide 13, a pneumatic slider 14, a pneumatic clamp A15, and an air pump A16. The pneumatic slide 13 is fixedly mounted on the turntable A5. The pneumatic slider 14 is slidably mounted on the pneumatic slide 13 along the radial direction of the turntable A5. There are two pneumatic clamps A15, which are respectively located at the upper front end of the pneumatic slider 14 and the front end of the pneumatic slider 14. The air pump A16 is located in the middle of the turntable A5.

[0043] The air pump A16 is connected to the pneumatic slide 13 and the pneumatic clamp A15 via pipes.

[0044] The sapwood clamping component 10 includes a pneumatic inclined slide block 17, a pneumatic inclined slider 18, a pneumatic clamp B19, and an air pump B20. The pneumatic inclined slide block 17 is fixedly mounted on the turntable B9. The pneumatic inclined slider 18 is longitudinally inclined and slidably mounted on the pneumatic inclined slide block 17. The pneumatic clamp B19 is located at the front end of the pneumatic inclined slider 18. The air pump B20 is located in the middle of the turntable B9.

[0045] The air pump B20 is connected to the pneumatic inclined slide 17 and the pneumatic clamp B19 via pipes.

[0046] The bracket A8 is fixedly equipped with a hydraulic cylinder A21, and the piston rod of the hydraulic cylinder A21 is fixedly equipped with a fixing block A22. The lower part of the fixing block A22 is rotatably equipped with a pressing wheel 23. The pneumatic inclined slider 18 can move to the lower part of the pressing wheel 23. The pressing wheel 23 is arranged opposite to the anvil cutting accessory 7.

[0047] The anvil cutting accessory 7 includes a fixed base 24, a hydraulic cylinder B25, a limiting wedge block 26, and a cutter A27. The fixed base 24 is fixedly mounted on the bracket A8, the hydraulic cylinder B25 is fixedly mounted on the fixed base 24, the limiting wedge block 26 is fixedly connected to the piston rod of the hydraulic cylinder B25, and the cutter A27 is fixedly mounted on the lower front end of the limiting wedge block 26.

[0048] A limiting block A28 is fixedly provided at the end of the pneumatic clamp A15 located on the upper part of the pneumatic slider 14. There are two limiting blocks A28, which are symmetrically arranged at the end of the clamp arm of the pneumatic clamp A15. The walls of the two limiting blocks A28 are provided with inclined surfaces. The inclined surfaces can cooperate with the limiting wedge block 26 to separate the pneumatic clamp A15 on the upper part of the pneumatic slider 14 and limit the head of the limiting wedge block 26 to the upper surface of the pneumatic slider 14.

[0049] The aforementioned wood cutting accessory 11 includes a hydraulic cylinder C29, a fixing block B30, a mounting block 31, and a cutter B32. The hydraulic cylinder C29 is fixedly mounted on the bracket B12, the fixing block B30 is fixedly mounted on the piston rod of the hydraulic cylinder C29, the mounting block 31 is fixedly mounted on the lower part of the fixing block B30, and the cutter B32 is fixedly mounted on the front end of the mounting block 31.

[0050] The front end of the cutter B32 is set towards the center of the turntable B9. The cutter B32 includes an adjustment block 33 and a blade 34. There are two adjustment blocks 33 and two blades 34. The adjustment blocks 33 are symmetrically arranged at the front end of the mounting block 31. The two adjustment blocks 33 are spaced apart. The two blades 34 are respectively arranged on the upper part of the adjustment blocks 33.

[0051] The two blades 34 are spaced apart, and the sidewalls of the two blades 34 are inclined with blades 35, which are inclined toward the upper part of the blades 34.

[0052] The upper part of the adjustment block 33 is symmetrically provided with threaded holes, and the upper part of the blade 34 is symmetrically provided with adjustment holes 36. The distance between the blades 35 of the two blades 34 is adjusted by the threaded holes, adjustment holes 36 and bolts.

[0053] The front end of the cutter B32 is provided with a bracket C37, and the upper part of the bracket C37 is provided with a limiting block B38, which is located at the lower part of the wood cutting accessory 11.

[0054] Working principle of the invention:

[0055] The rootstock is placed on the rootstock clamping component 6 between the conveyor table 4 and the rootstock cutting component 7. The air pump A16 is started, and the rootstock is fixed by the pneumatic clamp A15. The stepper motor rotates the rootstock clamping component 6 with the rootstock to the lower part of the rootstock cutting component 7. The hydraulic cylinder B25 of the rootstock cutting component 7 moves down, and the upper part of the rootstock is split open by the cutter A27 to form a cut.

[0056] The inclined surfaces of the two limiting blocks A28 can cooperate with the limiting wedge block 26 to separate the pneumatic clamp A15 on the upper part of the pneumatic slider 14 and limit the head of the limiting wedge block 26 to the upper surface of the pneumatic slider 14.

[0057] Meanwhile, the scion is placed on the scion clamping component 10 between the rootstock cutting component 7 and the scion cutting component 11. The air pump B20 is started, and the scion is tightened by the pneumatic clamp B. The stepper motor rotates the scion clamping component 10 with the scion placed on it to the upper part of the scion cutting component 11. The air pump B20 is started, and the scion is moved down to the blade 35 of the scion cutting component 11 by the pneumatic inclined slide 17 and the pneumatic inclined slider 18, thereby cutting the scion into a wedge shape.

[0058] Then, the air pump B20 is started, and the pneumatic inclined slide block 17 and pneumatic inclined slide block 18 are used to lift the stubble. The stubble clamping component 10 moves the stubble cut into a wedge shape to the rootstock clamping component 6 at the bottom of the rootstock cutting accessory 7.

[0059] The air pump A16 is started, and the anvil is pushed away from the anvil cutting accessory 7 through the pneumatic slide 13 and the pneumatic slider 14;

[0060] At this time, the air pump B20 is started, and the pneumatic inclined slide block 17 and pneumatic inclined slide block 18 are used to lower the scion, so that the cut of the rootstock is inserted into the wedge-shaped cut of the scion.

[0061] Meanwhile, to ensure a tight fit between the cut of the rootstock and the wedge-shaped cut of the scion, the hydraulic cylinder A21 drives the downward pressing wheel 23 to move downward, squeezing the pneumatic inclined slider 18.

[0062] The grafted rootstock and scion are rotated to the conveyor table 4 by the rootstock clamping component 6, and then transported to the next process via the conveyor table 4.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A three-station cyclic rotary coupling device, characterized in that: The application relates to a grafting machine, which comprises a workbench (1), wherein the upper part of the workbench (1) is symmetrically provided with a stock wood clamping and rotating mechanism (2) and a scion wood clamping and rotating mechanism (3), and the side of the workbench (1) close to the stock wood clamping and rotating mechanism (2) is provided with a conveying table (4); the stock wood clamping and rotating mechanism (2) comprises a rotating disc A (5), stock wood clamping components (6) and stock wood cutting accessories (7), a stepping motor is fixedly arranged at the bottom of the rotating disc A (5), the stepping motor is fixedly arranged in the inner cavity of the workbench (1), the stock wood clamping components (6) are three in number, the stock wood clamping components (6) are uniformly arranged on the upper surface of the rotating disc A (5) along the axis of the rotating disc A (5), the stock wood cutting accessories (7) are arranged on the upper part of the rotating disc A (5) through a support A (8), the support A (8) is fixedly arranged on the workbench (1), and the stock wood cutting accessories (7) can be matched with the stock wood clamping components (6) to cut the stock wood; the scion wood clamping and rotating mechanism (3) comprises a rotating disc B (9), scion wood clamping components (10) and scion wood cutting accessories (11), a stepping motor is fixedly arranged at the bottom of the rotating disc B (9), the stepping motor is fixedly arranged in the inner cavity of the workbench (1), the scion wood clamping components (10) are three in number, the scion wood clamping components (10) are uniformly arranged on the upper surface of the rotating disc B (9) along the axis of the rotating disc B (9), the scion wood cutting accessories (11) are arranged on one side of the rotating disc B (9) through a support B (12), the support B (12) is fixedly arranged on the workbench (1), and the scion wood cutting accessories (11) can be matched with the scion wood clamping components (10) to cut the scion wood; the height of the rotating disc A (5) is lower than that of the rotating disc B (9), the stock wood cutting accessories (7) are arranged on the upper part of the connecting line of the centers of the rotating disc A (5) and the rotating disc B (9), and the stock wood clamping components (6) and the scion wood clamping components (10) can be arranged on the connecting line of the centers of the rotating disc A (5) and the rotating disc B (9); the stock wood clamping components (6) comprise a pneumatic sliding base (13), a pneumatic sliding block (14), pneumatic clamps A (15) and a pneumatic pump A (16), the pneumatic sliding base (13) is fixedly arranged on the rotating disc A (5), the pneumatic sliding block (14) is slidingly arranged on the pneumatic sliding base (13) along the radial direction of the rotating disc A (5), the pneumatic clamps A (15) are two in number and are arranged on the upper part of the front end of the pneumatic sliding block (14) and the front end of the pneumatic sliding block (14) respectively, and the pneumatic pump A (16) is arranged in the middle part of the rotating disc A (5); the pneumatic pump A (16) is connected with the pneumatic sliding base (13) and the pneumatic clamps A (15) through pipelines. The anvil cutting accessory (7) includes a fixing seat (24), a hydraulic cylinder B (25), a limiting wedge block (26) and a cutter A (27), the fixing seat (24) is fixedly arranged on the support A (8), the hydraulic cylinder B (25) is fixedly arranged on the fixing seat (24), the limiting wedge block (26) is fixedly connected with the piston rod of the hydraulic cylinder B (25), and the cutter A (27) is fixedly arranged at the lower portion of the front end of the limiting wedge block (26); the end of the pneumatic clamp A (15) arranged on the upper portion of the pneumatic slide block (14) is fixedly provided with a limiting block A (28), the limiting block A (28) is provided with two, the two limiting blocks A (28) are symmetrically arranged at the ends of the clamp arms of the pneumatic clamp A (15), and the wall surfaces of the two limiting blocks A (28) arranged opposite to each other are provided with inclined surfaces, the inclined surfaces can separate the pneumatic clamp A (15) on the upper portion of the pneumatic slide block (14) by cooperating with the limiting wedge block (26), and the head of the limiting wedge block (26) is limited on the upper surface of the pneumatic slide block (14).

2. The three-station cyclic rotary joint of claim 1, wherein: The ear wood clamping component (10) includes a pneumatic inclined slide seat (17), a pneumatic inclined slide block (18), a pneumatic clamp B (19) and a gas pump B (20), the pneumatic inclined slide seat (17) is fixedly arranged on the rotating disc B (9), the pneumatic inclined slide block (18) is longitudinally and obliquely arranged on the pneumatic inclined slide seat (17), the pneumatic clamp B (19) is arranged at the front end of the pneumatic inclined slide block (18), and the gas pump B (20) is arranged at the middle portion of the rotating disc B (9); the gas pump B (20) is connected with the pneumatic inclined slide seat (17) and the pneumatic clamp B (19) in a pipeline mode.

3. The three-station cyclic rotary joint of claim 1, wherein: The support A (8) is fixedly provided with the hydraulic cylinder A (21), the piston rod of the hydraulic cylinder A (21) is fixedly provided with a fixing block A (22), the lower portion of the fixing block A (22) is rotatably provided with a pressing rotating wheel (23), the pneumatic inclined slide block (18) can move to the lower portion of the pressing rotating wheel (23), and the pressing rotating wheel (23) is arranged opposite to the anvil cutting accessory (7).

4. The three-station cyclic rotary joint of claim 1, wherein: The ear wood cutting accessory (11) includes a hydraulic cylinder C (29), a fixing block B (30), a mounting block (31) and a cutter B (32), the hydraulic cylinder C (29) is fixedly arranged on the support B (12), the fixing block B (30) is fixedly arranged on the piston rod of the hydraulic cylinder C (29), the mounting block (31) is fixedly arranged at the lower portion of the fixing block B (30), and the cutter B (32) is fixedly arranged at the front end of the mounting block (31); the front end of the cutter B (32) is arranged towards the center of the rotating disc B (9), the cutter B (32) includes an adjusting block (33) and a blade body (34), the adjusting block (33) and the blade body (34) are provided with two, the adjusting block (33) is symmetrically arranged at the front end of the mounting block (31), the two adjusting blocks (33) are arranged in a gap mode, and the two blade bodies (34) are respectively arranged at the upper portions of the adjusting blocks (33).

5. A three position rotary indexing device according to claim 4 wherein: The two blade bodies (34) are arranged in a gap mode, and the side walls of the two blade bodies (34) arranged opposite to each other are obliquely provided with blades (35), and the blades (35) are obliquely arranged towards the upper portions of the blade bodies (34).

6. A three position rotary indexing device according to claim 5 wherein: The upper part of the adjusting block (33) is symmetrically provided with a threaded hole, the upper part of the cutter body (34) is symmetrically provided with an adjusting hole (36), and the distance between the blades (35) of the two cutter bodies (34) is adjusted through the threaded hole, the adjusting hole (36) and a bolt.

7. A three position rotary indexing device according to claim 6 wherein: The front end of the cutter B (32) is provided with a support C (37), the upper part of the support C (37) is provided with a limiting block B (38), and the limiting block B (38) is arranged on the lower part of the spur cutting assembly (11).

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