Rapid slicing device for traditional Chinese medicine decoction piece production

By designing a rapid slicing device for the production of Chinese herbal medicines including chopping boards, knife holders and splints, the problems of low slicing efficiency and risk of cutting hands in the prior art Chinese herbal medicines are solved, and a fast and safe slicing process is achieved.

CN222494474UActive Publication Date: 2025-02-18BOZHOU SANFENG HERBAL PIECES CO LTD
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Patent Information

Application Number
CN202421312869.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-07
Publication Date
2025-02-18
Estimated Expiration
2034-06-07

AI Technical Summary

Technical Problem

In the prior art, the slice device of rhizome Chinese herbal medicines is inefficient, and there is a risk of cutting the fingers of the operator during the cutting process.

Method used

A rapid slicing device for the production of Chinese herbal medicines was designed, including a chopping board, a knife holder, a fixed blade and a removable blade. The Chinese herbal medicine is limited through the splint, and the knife holder is quickly rotated to complete the rapid slicing of multiple Chinese herbal medicines.

Benefits of technology

The rapid slicing of Chinese herbal medicines is achieved, which significantly improves the slicing speed, and avoids the risk of hand cutting of hand positioning through splint positioning.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of traditional Chinese medicine decoction piece slicing devices, in particular to a rapid slicing device for traditional Chinese medicine decoction piece production, which comprises a chopping board, two groups of knife rest screwing seats are fixed on the side surface of the chopping board, a knife rest is rotatably connected between the two groups of knife rest screwing seats, and a fixed blade is fixed at the bottom end of the knife rest. A plurality of groups of detachable blade handles are movably arranged on the surface of the knife rest; the device has the beneficial effects that a plurality of rhizome traditional Chinese medicinal materials with the same length are placed at the top end of the chopping board, the clamping plates are pressed at the two ends of the rhizome traditional Chinese medicinal materials to limit the traditional Chinese medicinal materials, and the number of detachable blades on the surface of the knife rest is adjusted according to the distance between the two sets of clamping plates; and finally, the knife rest is rapidly rotated to enable the fixed blade and the detachable blade to cut off the traditional Chinese medicinal materials from the traditional Chinese medicinal materials and sink into the knife groove, so that rapid slicing of multiple rhizome type traditional Chinese medicinal materials with the same length is completed at a time, the slicing speed of traditional Chinese medicine decoction pieces is greatly increased, meanwhile, the traditional Chinese medicinal materials are positioned through the clamping plate, and the hand cutting risk caused by hand holding positioning is avoided.
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Description

Technical Field

[0001] The utility model relates to the field of Chinese medicine slice slicing devices, in particular to a Chinese medicine slice production rapid slicing device. Background Art

[0002] Chinese herbal medicines are Chinese herbal medicines that have been processed and prepared according to the theories and methods of traditional Chinese medicine and can be directly used in clinical Chinese medicine. Chinese herbal medicines include some slices of Chinese herbal medicines processed at the place of origin, original herbal medicines and those that have been cut and processed.

[0003] In the prior art, the slicing method of rhizome Chinese herbal medicine slices is often carried out by manual slicing to avoid them being squeezed into a flat shape. When producing rhizome Chinese herbal medicine slices, the rhizome Chinese herbal medicine is placed on the bottom plate of a manual cutting device, one end of the Chinese herbal medicine is slightly extended out of the bottom plate, and then the cutting knife installed on the side of the bottom plate is rotated to quickly cut off the part of the Chinese herbal medicine extending out of the bottom plate, thereby completing the production of a piece of Chinese herbal medicine slice. This production method can manually adjust the thickness of the slice.

[0004] However, the slicing device for rhizome Chinese herbal medicines in the prior art can only produce one piece of herbal medicine at a time, which is extremely inefficient. In addition, the operator needs to hold the Chinese herbal medicine with his hands to position and advance it during the cutting process, which poses a risk of cutting the operator's fingers. Utility Model Content

[0005] The utility model aims to provide a rapid slicing device for producing Chinese medicine slices to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rapid slicing device for producing Chinese herbal medicine slices, comprising: a chopping board, two groups of knife holder rotating seats are fixed on the side of the chopping board, a knife holder is rotatably connected between the two groups of knife holder rotating seats, a fixed blade is fixed to the bottom end of the knife holder, a plurality of groups of detachable blade handles are movably provided on the surface of the knife holder, a detachable blade is fixed to the bottom end of the detachable blade handle, a connecting plate is movably connected to the surface of the chopping board, a splint is movably connected to the surface of the connecting plate, a knife groove is opened on the surface of the chopping board, and the fixed blade and the detachable blade are movably inserted in the knife groove.

[0007] Preferably, a spring groove is provided on the surface of the chopping board, a spring plate is slidably connected in the spring groove, a connecting rod is fixed to the top end of the spring plate, the top end of the connecting rod extends out of the spring groove and is fixed to the bottom end of the connecting plate, a clamping spring is sleeved on the rod body of the connecting rod, the bottom end of the clamping spring abuts against the top end of the spring plate, and the top end of the clamping spring abuts against the inner wall of the spring groove.

[0008] Preferably, a support rod is movably inserted on the surface of the connecting plate, one end of the support rod is fixed on the surface of the clamping plate, and a handle is provided on the top end of the connecting plate.

[0009] Preferably, limiting grooves are provided on the two symmetrical end faces of the detachable blade handle, wherein a fixed limiting rod is movably inserted in one group of limiting grooves, and the other end of the fixed limiting rod is fixed on one end face of the tool holder, and a movable limiting rod is movably inserted in the other group of limiting grooves, and the other end of the movable limiting rod is movably inserted in the movable limiting rod installation groove, and the movable limiting rod installation groove is provided on the other end face of the tool holder.

[0010] Preferably, one end of the movable limit rod extending into the movable limit rod installation groove is fixed with a pull rod and a limit spring, the other end of the limit spring is fixed on the inner wall of the groove body of the movable limit rod installation groove, and the other end of the pull rod is movably inserted in the pull rod hole, and the pull rod hole is opened on the surface of the tool holder and passes through the movable limit rod installation groove.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides a rapid slicing device for producing Chinese medicinal root slices. A plurality of Chinese medicinal root stems of the same length are placed on the top of a chopping board, and a clamp is made to press on both ends of the Chinese medicinal root stems to limit the position of the Chinese medicinal root stems. After the limiting is completed, the number of detachable blades on the surface of the knife holder is adjusted according to the distance between the two groups of clamps. Finally, the knife holder is quickly rotated to cut the fixed blade and the detachable blade from the Chinese medicinal root stem and sink into the knife groove, so that the rapid slicing of a plurality of Chinese medicinal root stems of the same length is completed at one time, and the slicing speed of Chinese medicinal root slices is greatly accelerated. At the same time, the Chinese medicinal root stems are positioned by the clamp, and the risk of cutting the hand during the hand-held positioning is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the spring groove;

[0015] Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of a detachable blade handle;

[0017] Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0018] Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point C in the middle.

[0019] In the figure: chopping board 1, knife holder screw-on seat 2, knife holder 3, knife groove 4, fixed blade 5, detachable blade handle 6, detachable blade 7, spring groove 8, spring plate 9, connecting rod 10, clamping spring 11, connecting plate 12, support rod 13, clamping plate 14, handle 15, limit groove 16, movable limit rod 17, movable limit rod mounting groove 18, pull rod hole 19, pull rod 20, limit spring 21, fixed limit rod 22. DETAILED DESCRIPTION

[0020] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] See also Figure 1-Figure 6 The utility model provides a technical solution: a rapid slicing device for producing Chinese herbal medicine slices, comprising: a chopping board 1, two groups of knife holder rotating seats 2 are fixed on the side of the chopping board 1, a knife holder 3 is rotatably connected between the two groups of knife holder rotating seats 2, a fixed blade 5 is fixed to the bottom end of the knife holder 3, a plurality of groups of detachable blade handles 6 are movably arranged on the surface of the knife holder 3, a detachable blade 7 is fixed to the bottom end of the detachable blade handle 6, a connecting plate 12 is movably connected to the surface of the chopping board 1, a clamping plate 14 is movably connected to the surface of the connecting plate 12, a knife groove 4 is opened on the surface of the chopping board 1, and the fixed blade 5 and the detachable blade 7 are both movably inserted in the knife groove 4.

[0023] In actual use, the knife holder 3 is first rotated around the knife holder rotating seat 2 to make the knife holder 3 move away from the top of the chopping board 1, and multiple root-type Chinese medicinal materials of the same length are placed horizontally on the top of the chopping board 1 so that they are perpendicular to the knife groove 4, and then the connecting plate 12 is pulled upward to make the clamping plate 14 move upward, and at the same time, the two groups of clamping plates 14 are adjusted in a direction close to each other so that the two groups of clamping plates 14 are located directly above the two ends of the Chinese medicinal materials, and then the connecting plate 12 is gradually loosened downward to make the clamping plates 14 move downward so that the clamping plates 14 are pressed on the two ends of the root-type Chinese medicinal materials, and the Chinese medicinal materials are cut. The limiting operation is performed. After the limiting operation is completed, the number of detachable blades 7 is adjusted according to the distance between the two groups of clamps 14, so that the distance between the two groups of detachable blades 7 on the two sides of the knife holder 3 is smaller than the distance between the two groups of clamps 14. Finally, the knife holder 3 is quickly rotated to rotate back to the top of the chopping board 1, and the fixed blade 5 and the detachable blade 7 are cut from the Chinese medicinal materials and immersed in the knife groove 4, thereby completing the rapid slicing of multiple root and rhizome Chinese medicinal materials of the same length at one time. At the same time, the Chinese medicinal materials are positioned by the clamps 14, avoiding the risk of cutting hands during hand-held positioning.

[0024] Embodiment 2

[0025] On the basis of Example 1, in order to realize the connection between the connecting plate 12 and the chopping board 1 and the connection between the splint 14 and the connecting plate 12, a spring groove 8 is opened on the surface of the chopping board 1, and a spring plate 9 is slidably connected in the spring groove 8. A connecting rod 10 is fixed to the top end of the spring plate 9. The top end of the connecting rod 10 extends out of the spring groove 8 and is fixed to the bottom end of the connecting plate 12. A clamping spring 11 is sleeved on the rod body of the connecting rod 10. The bottom end of the clamping spring 11 abuts against the top end of the spring plate 9, and the top end of the clamping spring 11 abuts against the inner wall of the spring groove 8. A support rod 13 is movably inserted on the surface of the connecting plate 12, and one end of the support rod 13 is fixed on the surface of the splint 14. A handle 15 is provided at the top end of the connecting plate 12.

[0026] The connecting rod 10 fixed to the bottom end of the connecting plate 12 is movably inserted in the spring groove 8 opened at the top of the chopping board 1, and at the same time, a spring plate 9 is fixed to the bottom end of the connecting rod 10, thereby realizing the connection between the connecting plate 12 and the chopping board 1; the supporting rod 13 fixed to the surface of the splint 14 is movably inserted on the surface of the connecting plate 12, thereby realizing the connection between the supporting rod 13 and the connecting plate 12, and at the same time, a handle 15 is provided at the top of the connecting plate 12 for the convenience of lifting and placing the connecting plate 12.

[0027] Embodiment 3

[0028] On the basis of Example 2, in order to achieve the positioning of Chinese medicinal materials by the splint 14, a spring groove 8 is opened on the surface of the chopping board 1, and a spring plate 9 is slidably connected in the spring groove 8. A connecting rod 10 is fixed to the top end of the spring plate 9. The top end of the connecting rod 10 extends out of the spring groove 8 and is fixed to the bottom end of the connecting plate 12. A clamping spring 11 is sleeved on the rod body of the connecting rod 10. The bottom end of the clamping spring 11 abuts against the top end of the spring plate 9, and the top end of the clamping spring 11 abuts against the inner wall of the spring groove 8. A support rod 13 is movably inserted on the surface of the connecting plate 12, and one end of the support rod 13 is fixed to the surface of the splint 14. A handle 15 is provided at the top end of the connecting plate 12.

[0029] A clamping spring 11 is sleeved on the rod body of the connecting rod 10. When the connecting plate 12 moves upward, the connecting plate 12 drives the spring plate 9 to move upward in the spring groove 8 through the connecting rod 10. The movement of the spring plate 9 compresses the clamping spring 11. When the two sets of splints 14 move in a direction approaching each other, one end of the support rod 13 fixed with the splint 14 extends out from the surface of the connecting plate 12. When the two sets of splints 14 move to above the two ends of the Chinese medicinal materials, as the connecting plate 12 gradually relaxes, the spring plate 9 and the splint 14 also gradually move downward. After the splint 14 is pressed on the top of the Chinese medicinal materials, the still compressed clamping spring 11 has a downward thrust on the spring plate 9. This thrust is transmitted to the connecting plate 12 through the connecting rod 10, and then transmitted to the splint 14 through the support rod 13, thereby forming a clamping force of the splint 14 on the Chinese medicinal materials, thereby realizing the positioning effect of the splint 14 on the Chinese medicinal materials.

[0030] Embodiment 4

[0031] On the basis of Example 3, in order to adjust the number of detachable blades 7 on the surface of the tool holder 3, a detachable blade 7 is fixed to the bottom end of the detachable blade handle 6, and limiting grooves 16 are provided on the two symmetrical end faces of the detachable blade handle 6, one group of limiting grooves 16 is movably inserted with a fixed limiting rod 22, and the other end of the fixed limiting rod 22 is fixed on one end face of the tool holder 3, and the other group of limiting grooves 16 is movably inserted with a movable limiting rod 17, and the other end of the movable limiting rod 17 is movably inserted in the movable limiting rod mounting groove 18, and the movable limiting rod mounting groove 18 is provided on the other end face of the tool holder 3, and the end of the movable limiting rod 17 extending into the movable limiting rod mounting groove 18 is fixed with a pull rod 20 and a limit spring 21, and the other end of the limit spring 21 is fixed on the inner wall of the movable limiting rod mounting groove 18, and the other end of the pull rod 20 is movably inserted in the pull rod hole 19, and the pull rod hole 19 is provided on the surface of the tool holder 3 and is connected with the movable limiting rod mounting groove 18.

[0032] The pull rod 20 is pulled in the direction away from the tool holder 3, and the pull rod 20 extends a longer distance from the pull rod hole 19. The movement of the pull rod 20 causes the movable limit rod 17 to be completely retracted into the movable limit rod installation groove 18, so that the movable limit rod 17 is withdrawn from the limit groove 16. Then the detachable blade handle 6 is pushed in the direction close to the movable limit rod 17, so that the fixed limit rod 22 is withdrawn from the limit groove 16 at the other end of the detachable blade handle 6. The group of detachable blade handles 6 and the detachable blade 7 fixed under the group of detachable blade handles 6 can be removed from the surface of the tool holder 3; the pull rod 20 is pulled in the direction away from the tool holder 3 again, so that the movable limit rod 17 is completely retracted into the movable limit rod installation groove 18. At this time, the limit spring 21 is compressed, and then the detachable blade handle 6 is placed on the corresponding group of movable limit rods 17. and the fixed limiting rod 22, so that the detachable blade handle 6 moves toward the direction close to the fixed limiting rod 22, so that the fixed limiting rod 22 is inserted into a group of limiting grooves 16 of the detachable blade handle 6, and then the other group of limiting grooves 16 of the detachable blade handle 6 is aligned with the movable limiting rod 17, and finally the pull rod 20 is released, and the limiting spring 21 pushes one end of the movable limiting rod 17 into the limiting groove 16 under the elastic action, and the other end of the movable limiting rod 17 stays in the movable limiting rod installation groove 18, and the installation of the group of detachable blade handles 6 and the detachable blade 7 at the bottom end of the group of detachable blade handles 6 and the tool holder 3 can be completed; by installing and removing each group of detachable blade handles 6 and the detachable blade 7 at the bottom end of the detachable blade handles 6 through the above steps, the number of detachable blades 7 on the surface of the tool holder 3 can be adjusted.

[0033] During actual use, the knife holder 3 is first rotated around the knife holder rotating seat 2 to move the knife holder 3 away from the top of the chopping board 1, and a plurality of rhizome Chinese medicinal materials of the same length are placed horizontally on the top of the chopping board 1 so that they are perpendicular to the knife groove 4. Then, by pulling the connecting plate 12 upward, the splint 14 is also moved upward, and at the same time, the two groups of splints 14 are adjusted in a direction close to each other so that the two groups of splints 14 are located directly above the two ends of the Chinese medicinal materials. Then, the connecting plate 12 is gradually loosened downward so that the splints 14 also move downward so that the splints 14 are pressed on the two ends of the rhizome Chinese medicinal materials to limit the position of the Chinese medicinal materials. After the limiting is completed, the number of detachable blades 7 is adjusted according to the distance between the two groups of splints 14, so that the distance between the two groups of detachable blades 7 on the two sides of the knife holder 3 is less than the distance between the two groups of splints 14. The distance between the boards 14 is adjusted, and finally the knife holder 3 is quickly rotated to rotate the knife holder 3 back to the top of the chopping board 1, and the fixed blade 5 and the detachable blade 7 are cut from the Chinese medicinal materials and immersed in the knife groove 4, so as to complete the rapid slicing of multiple root and stem Chinese medicinal materials of the same length at one time, and at the same time, the Chinese medicinal materials are positioned by the splint 14, avoiding the risk of cutting hands when positioning by hand; the connecting rod 10 fixed at the bottom end of the connecting plate 12 is movably inserted in the spring groove 8 opened at the top of the chopping board 1, and at the same time, a spring plate 9 is fixed at the bottom end of the connecting rod 10, so as to realize the connection between the connecting plate 12 and the chopping board 1; the supporting rod 13 fixed on the surface of the splint 14 is movably inserted on the surface of the connecting plate 12 to realize the connection between the supporting rod 13 and the connecting plate 12, and at the top of the connecting plate 12 A handle 15 is provided to facilitate lifting and lowering the connecting plate 12; a clamping spring 11 is sleeved on the rod body of the connecting rod 10. When the connecting plate 12 moves upward, the connecting plate 12 drives the spring plate 9 to move upward in the spring groove 8 through the connecting rod 10. The movement of the spring plate 9 compresses the clamping spring 11. When the two sets of splints 14 move in a direction approaching each other, one end of the support rod 13 fixed with the splint 14 extends out from the surface of the connecting plate 12. When the two sets of splints 14 move to the top of the two ends of the Chinese medicinal materials, as the connecting plate 12 is gradually relaxed, the spring plate 9 and the splint 14 also gradually move downward. After the splint 14 is pressed on the top of the Chinese medicinal materials, the still compressed clamping spring 11 has a downward thrust on the spring plate 9, and this thrust is transmitted to the connecting plate 1 through the connecting rod 10. 2, and then transmitted to the clamping plate 14 through the support rod 13, thereby forming a clamping force of the clamping plate 14 on the Chinese medicinal materials, and realizing the positioning effect of the clamping plate 14 on the Chinese medicinal materials; pulling the pull rod 20 in the direction away from the knife holder 3, the pull rod 20 extends a longer distance from the pull rod hole 19, and the movement of the pull rod 20 makes the movable limit rod 17 completely retracted into the movable limit rod installation groove 18, so that the movable limit rod 17 withdraws from the limit groove 16, and then the detachable blade handle 6 is moved in the direction close to the movable limit rod 17, so that the fixed limit rod 22 withdraws from the limit groove 16 at the other end of the detachable blade handle 6, and the detachable blade handle 6 and the detachable blade 7 fixed under the detachable blade handle 6 can be removed from the surface of the knife holder 3;The pull rod 20 is pulled away from the knife holder 3 again, so that the movable limit rod 17 is completely retracted into the movable limit rod installation groove 18. At this time, the limit spring 21 is compressed, and then the detachable blade handle 6 is placed between a corresponding set of movable limit rods 17 and fixed limit rods 22, so that the detachable blade handle 6 moves toward the fixed limit rod 22, and the fixed limit rod 22 is inserted into a set of limit grooves 16 of the detachable blade handle 6, and then the other set of limit grooves 16 of the detachable blade handle 6 is aligned with the movable limit rod 17. Finally, release the pull rod 20, and the limit spring 21 pushes one end of the movable limit rod 17 into the limit groove 16 under the elastic action, and the other end of the movable limit rod 17 stays in the movable limit rod installation groove 18, and the installation of the detachable blade handle 6 and the detachable blade 7 at the bottom of the detachable blade handle 6 and the blade holder 3 can be completed; through the above steps, the detachable blade handles 6 and the detachable blades 7 at the bottom of the detachable blade handles 6 can be installed and removed, and the number of detachable blades 7 on the surface of the blade holder 3 can be adjusted. ;

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid slicing device for producing Chinese herbal medicine slices, comprising: A chopping board (1) is characterized in that: two groups of knife holder screw-on seats (2) are fixed on the side of the chopping board (1), a knife holder (3) is rotatably connected between the two groups of knife holder screw-on seats (2), a fixed blade (5) is fixed to the bottom end of the knife holder (3), a plurality of groups of detachable blade handles (6) are movably arranged on the surface of the knife holder (3), a detachable blade (7) is fixed to the bottom end of the detachable blade handle (6), a connecting plate (12) is movably connected to the surface of the chopping board (1), a clamping plate (14) is movably connected to the surface of the connecting plate (12), a knife groove (4) is provided on the surface of the chopping board (1), and the fixed blade (5) and the detachable blade (7) are both movably inserted into the knife groove (4).

2. A rapid slicing device for producing Chinese herbal medicine slices according to claim 1, characterized in that: A spring groove (8) is provided on the surface of the chopping board (1), a spring plate (9) is slidably connected in the spring groove (8), a connecting rod (10) is fixed to the top end of the spring plate (9), the top end of the connecting rod (10) extends out of the spring groove (8) and is fixed to the bottom end of the connecting plate (12), a clamping spring (11) is sleeved on the rod body of the connecting rod (10), the bottom end of the clamping spring (11) abuts against the top end of the spring plate (9), and the top end of the clamping spring (11) abuts against the inner wall of the spring groove (8).

3. A rapid slicing device for producing Chinese medicine slices according to claim 1, characterized in that: A support rod (13) is movably inserted on the surface of the connecting plate (12), one end of the support rod (13) is fixed on the surface of the clamping plate (14), and a handle (15) is arranged at the top end of the connecting plate (12).

4. A rapid slicing device for producing Chinese medicine slices according to claim 1, characterized in that: The detachable blade handle (6) is provided with limit grooves (16) on two symmetrical end surfaces, wherein a fixed limit rod (22) is movably inserted in one set of the limit grooves (16), and the other end of the fixed limit rod (22) is fixed on one end surface of the tool holder (3), and a movable limit rod (17) is movably inserted in the other set of limit grooves (16), and the other end of the movable limit rod (17) is movably inserted in a movable limit rod installation groove (18), and the movable limit rod installation groove (18) is provided on the other end surface of the tool holder (3).

5. A rapid slicing device for producing Chinese medicine slices according to claim 4, characterized in that: One end of the movable limiting rod (17) extending into the movable limiting rod installation groove (18) is fixed with a pull rod (20) and a limit spring (21); the other end of the limit spring (21) is fixed to the inner wall of the movable limiting rod installation groove (18); the other end of the pull rod (20) is movably inserted into the pull rod hole (19); the pull rod hole (19) is provided on the surface of the tool holder (3) and is connected to the movable limiting rod installation groove (18).