Modularized reciprocating knife

Abstract

The utility model discloses a modularized reciprocating knife, which belongs to the field of medical examination instruments, solves the problem that a reciprocating knife in the prior art is complicated in structure, and adopts the technical scheme that the modularized reciprocating knife comprises a mounting seat, a reciprocating lead screw, a power handle, an inner knife tube and an outer knife tube, the mounting seat is provided with a front-back through movable channel and a limiting block located in the movable channel, the inner cutter tube is sleeved with the outer cutter tube, the outer cutter tube is detachably mounted at the front end of the mounting seat, the power handle is detachably mounted at the rear end of the mounting seat, and the inner cutter tube and the reciprocating lead screw are detachably connected into a whole. The reciprocating lead screw is installed in the movable channel, a power shaft of the power handle is installed in the movable channel and rotates synchronously with the reciprocating lead screw, the limiting block is limited in a spiral groove of the reciprocating lead screw, and the reciprocating lead screw moves back and forth in a reciprocating mode while rotating. The reciprocating cutter is simpler in structure and more convenient to assemble.

Description

Technical Field

[0001] This utility model relates to the field of medical examination instruments, and in particular to a modular reciprocating knife. Background Technology

[0002] To improve the effectiveness of removing tissues such as uterine fibroids, uterine polyps, and benign prostatic hyperplasia, existing technologies, such as invention patent CN113855153A, disclose the use of a lifting transmission structure and a rotation transmission structure. Although this achieves axial movement of the inner blade while simultaneously rotating it, the rotation drive structure includes a drive shaft, a first drive gear, a driven shaft, and a first driven gear, while the lifting transmission structure includes a lifting rod, a first connecting piece, and a second connecting piece. These components are numerous and complex, making assembly difficult for workers. Utility Model Content

[0003] The purpose of this invention is to provide a modular reciprocating cutter, which solves the problem of the complex structure of reciprocating cutters in the prior art, making the reciprocating cutter structure simpler and easier to assemble.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a modular reciprocating cutter, comprising a mounting base, a reciprocating screw, a power handle, an inner cutter tube, and an outer cutter tube. The mounting base has a through-flow movable channel and a limiting block located within the movable channel. The outer cutter tube is sleeved outside the inner cutter tube and detachably mounted on the front end of the mounting base. The power handle is detachably mounted on the rear end of the mounting base. The inner cutter tube and the reciprocating screw are detachably connected as a single unit. The reciprocating screw is installed within the movable channel. The power shaft of the power handle is installed within the movable channel and rotates synchronously with the reciprocating screw. The limiting block is positioned within the helical groove of the reciprocating screw. The reciprocating screw moves back and forth simultaneously with its rotation.

[0005] After adopting the above technical solution, this utility model has the following advantages: First, since the inner knife tube and the reciprocating screw are connected as one unit, and the main components such as the mounting base, the reciprocating screw, the power handle, the inner knife tube, and the outer knife tube are used to realize the rotation of the inner knife tube while it moves back and forth, the effect of removing tissues such as uterine fibroids, uterine polyps, and benign prostatic hyperplasia is improved, and the number of parts is reduced, which greatly simplifies the overall structure. Second, the inner knife tube and the reciprocating screw are detachably connected as one unit, which facilitates modular assembly. Before assembling the whole machine, the inner knife tube and the reciprocating screw can be assembled as one unit first, and then the whole machine can be installed on the mounting base, which greatly reduces the difficulty of assembling the whole machine and also helps to improve assembly efficiency. Furthermore, the mounting base, the power handle, the inner knife tube, and the outer knife tube adopt a detachable design, which makes it convenient for workers to assemble and disassemble, thereby simplifying the assembly process, and also making it convenient for later maintenance and replacement of a single structure, as well as for more comprehensive cleaning, sterilization and disinfection of each structure after disassembly.

[0006] Furthermore, the reciprocating screw includes an outer ring with a helical groove and an inner ring sleeved within the outer ring. The inner ring includes a through hole through which the inner cutter tube passes, and a mounting portion that axially protrudes from the outer ring and is detachably connected to the inner cutter tube.

[0007] By adopting the aforementioned technical solution, the combination design of the outer ring and inner ring, as well as the detachable connection between the inner ring and the inner knife tube, makes the maintenance of the reciprocating screw simpler and more efficient. When the spiral groove of the outer ring wears and affects the transmission accuracy of the reciprocating screw, maintenance personnel can remove the outer ring separately for repair or replacement without disassembling the inner ring and the connected inner knife tube, which greatly reduces the difficulty and cost of maintenance. Secondly, the axially protruding mounting part of the outer ring makes the part that the inner knife tube needs to be connected more intuitive and clear, and workers can complete the assembly and disassembly more quickly.

[0008] Furthermore, the mounting part is provided with a first mounting groove with an axial opening, and the outer side of the inner knife tube has a first protrusion that protrudes outward. The inner knife tube passes through the through hole so that the first protrusion enters the first mounting groove through the opening. The inner knife tube is also fitted with a first connecting ring for closing the opening of the first mounting groove and being threadedly connected to the mounting part. The first connecting ring abuts against the axial surface of the first protrusion.

[0009] The above technical solution, with its axially open first mounting groove and the first protrusion on the outer side of the inner cutter tube, makes the assembly process extremely intuitive. When assembling the inner cutter tube and the reciprocating screw, the worker simply inserts the inner cutter tube into the inner ring through hole, allowing the first protrusion to easily enter the first mounting groove along the opening. This operation is simple and straightforward, requiring no complex positioning or calibration, greatly reducing assembly difficulty. Subsequently, the first connecting ring is fitted onto the mounting part and tightened to complete the entire connection process.

[0010] Furthermore, the inner blade tube includes a first working section sleeved inside the outer ring and a first connecting section with the first protrusion. The diameter of the first connecting section is larger than the diameter of the first working section, and the first connecting section is used to pass through the through hole.

[0011] By adopting the aforementioned technical solution, the inner blade tube is divided into a first working section and a first connecting section with different diameters, achieving clear functional zoning. The first working section is responsible for performing cutting and other tasks, while the first connecting section is specifically used for connecting with other components. The different diameter design of the first connecting section and the first working section provides assembly workers with clear assembly guidance. During the assembly process, workers can easily distinguish different parts of the inner blade tube and accurately insert the first connecting section into the inner ring through hole, avoiding assembly errors caused by misoperation. The larger diameter of the first connecting section is easier to grip during operation, making it convenient for workers to accurately install the inner blade tube into place. It also provides a larger contact area for the connection with the reciprocating lead screw, enhancing the stability and firmness of the connection.

[0012] Furthermore, the inner ring and the mounting part are provided with an axially open second mounting groove at one end, and the power shaft of the power handle has an outwardly protruding second protrusion on the outside. The power shaft of the power handle passes through the through hole so that the second protrusion enters the second mounting groove.

[0013] Using the aforementioned technical solution, the second mounting groove with an axial opening in the inner ring mates with the second protrusion on the outer side of the power shaft of the power handle, creating an extremely simple and intuitive assembly method. During operation, the worker only needs to insert the power shaft of the power handle into the inner ring through hole, and then the second protrusion will naturally enter the second mounting groove. The entire process requires no complex positioning operations or the use of special tools, greatly reducing the difficulty of assembly.

[0014] Furthermore, the rear end of the mounting base is provided with a first connecting part, the outside of the power handle has a third protrusion protruding outward, and the power handle is also fitted with a second connecting ring for threaded connection with the first connecting part and for the third protrusion to abut against the first connecting part.

[0015] The above technical solution simplifies assembly and disassembly. By using a second connecting ring threaded into the first connecting part and firmly abutting the third protrusion against the first connecting part, a secure connection between the power handle and the mounting base is ensured. Simply insert the power handle into the first connecting part at the rear of the mounting base, align the third protrusion correctly, and then rotate the second connecting ring to secure it. Conversely, for disassembly, simply rotate the second connecting ring in the opposite direction to easily remove the power handle, greatly facilitating maintenance and replacement.

[0016] Furthermore, the front end of the mounting base is provided with a second connecting part, the outer side of the outer blade tube has a fourth protrusion protruding outward, and the outer blade tube is also fitted with a third connecting ring for threaded connection with the second connecting part and for the fourth protrusion to abut against the second connecting part.

[0017] The above technical solution simplifies assembly and disassembly. The threaded connection between the third connecting ring and the second connecting part, along with the tight abutment of the fourth protrusion against the second connecting part, ensures a secure connection between the outer blade tube and the mounting base. Simply insert the outer blade tube into the second connecting part at the front end of the mounting base, align the fourth protrusion correctly, and then rotate the third connecting ring to secure it. Conversely, for disassembly, simply rotate the third connecting ring in the opposite direction to easily remove the outer blade tube, greatly facilitating maintenance and replacement.

[0018] Furthermore, the outer blade tube includes a second working section sleeved outside the inner blade tube and a second connecting section with the fourth protrusion. The diameter of the second connecting section is larger than the diameter of the second working section. The second connecting section is inserted into the movable channel so that the fourth protrusion abuts against the second connecting section to pre-position the outer blade tube.

[0019] Through the above technical solution, the outer blade tube is divided into a second working section sleeved outside the inner blade tube and a second connecting section with a fourth protrusion. The diameter of the second connecting section is larger than that of the second working section, which greatly facilitates assembly. During assembly, workers can easily distinguish the different parts of the outer blade tube and insert the second connecting section into the movable channel of the mounting base. The fourth protrusion can quickly abut against the second connecting section at the front end of the mounting base to achieve pre-positioning of the outer blade tube. Assemblers do not need to repeatedly adjust the position of the outer blade tube during installation and can quickly determine the approximate installation position of the outer blade tube, which greatly reduces assembly time. It also provides a larger contact area between the second connecting section and the mounting base, enhancing the stability and firmness of the connection.

[0020] Furthermore, the mounting base has a positioning hole on its outer side, a perimeter protruding outward and surrounding the positioning hole, and a cover plate that closes the positioning hole. The positioning hole is used for the limit block to be inserted into or removed from the helical groove of the reciprocating screw. The perimeter and the cover plate surround and restrict the movement of the limit block in the front-back direction, left-right direction, and up-down direction.

[0021] Through the above technical solution, the design of the positioning hole allows the limit block to be easily installed into or removed from the helical groove of the reciprocating screw, facilitating adjustment during initial assembly or subsequent maintenance. The combined use of the surrounding edge and cover plate further restricts the movement of the limit block in the forward, backward, left, right, and up / down directions. During equipment operation, the reciprocating screw rotates and reciprocates at high speed. As a component controlling its movement trajectory, the limit block, through the above structural design, ensures as much as possible that it will not be displaced due to vibrations or other external forces generated by the reciprocating screw's movement, thereby guaranteeing the accuracy and stability of the reciprocating screw's movement.

[0022] Furthermore, the cover plate and the surrounding edge are threaded together.

[0023] The threaded connection, achieved through the aforementioned technical solution, simplifies and streamlines the assembly and disassembly process. Simply rotating the cover plate completes the fixing or removal operation, eliminating the need for additional tools. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the modular reciprocating cutter of this utility model;

[0026] Figure 2 This is a cross-sectional view of the modular reciprocating cutter of this utility model;

[0027] Figure 3 This is a cross-sectional view of a partial structure of the modular reciprocating cutter of this utility model;

[0028] Figure 4 This is an exploded view of the modular reciprocating cutter of this utility model;

[0029] Figure 5 This is a schematic diagram of the assembly of the inner knife tube and the reciprocating lead screw of this utility model.

[0030] Figure 6 This is a cross-sectional view of the inner knife tube and reciprocating lead screw of this utility model.

[0031] Figure 7 This is a schematic diagram of the assembly of the mounting base and reciprocating lead screw of this utility model;

[0032] Figure 8 This is a cross-sectional view of the mounting base and reciprocating lead screw of this utility model;

[0033] Figure 9 This is a schematic diagram of the assembly of the limiting block and the reciprocating lead screw of this utility model;

[0034] Figure 10 This is a cross-sectional view of the limiting block and reciprocating lead screw of this utility model;

[0035] Figure 11 This is a schematic diagram of the assembly of the support ring and the limiting block of this utility model;

[0036] Figure 12 This is a cross-sectional view of the support ring and limiting block of this utility model;

[0037] Figure 13 This is a schematic diagram of the assembly of the cover plate and positioning holes of this utility model;

[0038] Figure 14 This is a cross-sectional view of the cover plate and positioning hole of this utility model;

[0039] Figure 15This is a schematic diagram of the assembly of the outer blade tube and the mounting base of this utility model;

[0040] Figure 16 This is a sectional view of the outer blade tube and mounting base of this utility model;

[0041] Figure 17 This is a schematic diagram of the reciprocating lead screw of this utility model;

[0042] In the diagram, 10 is the mounting base; 11 is the moving channel; 12 is the first connecting part; 13 is the second connecting part; 14 is the positioning hole; 15 is the surrounding edge; 16 is the cover plate; and 17 is the support ring.

[0043] 20. Reciprocating lead screw; 21. Outer ring; 22. Inner ring; 23. Through hole; 24. Mounting part; 25. First mounting groove; 26. Second mounting groove; 27. Helical groove;

[0044] 30. Power handle; 31. Power shaft; 32. Second protrusion; 33. Third protrusion; 34. Second connecting ring;

[0045] 40. Inner blade; 41. First working section; 42. First connecting section; 421. First protrusion; 43. First connecting ring;

[0046] 50. Outer blade; 51. Third connecting ring; 52. Second working section; 53. Second connecting section; 531. Fourth protrusion;

[0047] 60. Limiting block. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0049] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein.

[0050] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.

[0051] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0052] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0053] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0054] like Figures 1 to 17 As shown, this utility model provides a modular reciprocating cutter, including a mounting base 10, a reciprocating screw 20, a power handle 30, an inner cutter tube 40, and an outer cutter tube 50. The mounting base 10 has a through-flow movable channel 11 and a limiting block 60 located within the movable channel 11. The outer cutter tube 50 is sleeved outside the inner cutter tube 40 and detachably mounted on the front end of the mounting base 10. The power handle 30 is detachably mounted on the rear end of the mounting base 10. The inner cutter tube 40 and the reciprocating screw 20 are detachably connected as a whole. The reciprocating screw 20 is installed in the movable channel 11. The power shaft 31 of the power handle 30 is installed in the movable channel 11 and rotates synchronously with the reciprocating screw 20. The limiting block 60 is limited in the spiral groove 27 of the reciprocating screw 20. The reciprocating screw 20 moves back and forth while rotating.

[0055] First, because the inner blade tube 40 and the reciprocating screw 20 are connected as one unit, and the main components such as the mounting base 10, the reciprocating screw 20, the power handle 30, the inner blade tube 40, and the outer blade tube 50 are used to achieve the rotation of the inner blade tube 40 while it moves back and forth, the effect of removing tissues such as uterine fibroids, uterine polyps, and benign prostatic hyperplasia is improved. It also reduces the number of parts and greatly simplifies the overall structure. Second, the inner blade tube 40 and the reciprocating screw 20 are detachably connected as one unit, which facilitates modular assembly. Before assembling the whole machine, the inner blade tube 40 and the reciprocating screw 20 can be assembled as one unit first, and then the whole machine can be installed on the mounting base 10, which greatly reduces the difficulty of assembling the whole machine and also helps to improve assembly efficiency. Furthermore, the mounting base 10, the power handle 30, the inner blade tube 40, and the outer blade tube 50 adopt a detachable design, which makes it convenient for workers to assemble and disassemble, thereby simplifying the assembly process and facilitating the maintenance and replacement of individual structures in the later stage, as well as facilitating more comprehensive cleaning, sterilization and disinfection of each structure.

[0056] It should be noted that in this application, the inner blade tube 40 has a hollow structure and is a straight-through type without obstruction. The blade of the inner blade tube 40 can be equipped with blade teeth, which can cut lesions such as uterine fibroids and uterine polyps by rotating and moving back and forth. The inner blade tube 40 can be connected to an external suction device to effectively suction the cut lesions through negative pressure. The hollow structure is not easy to get clogged.

[0057] It should be noted that the reciprocating screw 20 is a form of three-dimensional cam pair, characterized by two helical grooves 27 with the same pitch but opposite directions of rotation. The two ends are connected by a transition curve. Because the limiting block 60 is fixed within the helical groove 27, when the reciprocating screw 20 rotates, the limiting block 60 pushes the side of the helical groove 27, causing the reciprocating screw 20 to simultaneously perform axial reciprocating motion, i.e., back-and-forth reciprocating motion in this embodiment. It should be noted that the reciprocating screw 20 rotates in only one direction.

[0058] Specifically, the reciprocating screw 20 includes an outer ring 21 with a helical groove 27 and an inner ring 22 fitted inside the outer ring 21. The inner ring 22 includes a through hole 23 through which the inner knife tube 40 passes. The combination design of the outer ring 21 and the inner ring 22, as well as the detachable connection between the inner ring 22 and the inner knife tube 40, makes the maintenance of the entire reciprocating screw 20 simpler and more efficient. When the helical groove 27 of the outer ring 21 wears and affects the transmission accuracy of the reciprocating screw 20, the maintenance personnel can remove the outer ring 21 for maintenance or replacement without disassembling the inner ring 22 and the connected inner knife tube 40 and other components, which greatly reduces the difficulty and cost of maintenance.

[0059] To facilitate the assembly and disassembly of the inner cutter tube 40 and the reciprocating lead screw 20, the inner ring 22 includes an axially protruding mounting part 24 for detachable connection with the inner cutter tube 40, making the parts of the inner cutter tube 40 that need to be connected more intuitive and clear, and allowing workers to complete the assembly and disassembly more quickly.

[0060] Furthermore, the mounting part 24 is provided with a first mounting groove 25 with an axial opening, and the outer side of the inner knife tube 40 has a first protruding part 421 protruding outward. The inner knife tube 40 passes through the through hole 23 so that the first protruding part 421 enters the first mounting groove 25 through the opening. The inner knife tube 40 is also fitted with a first connecting ring 43 for closing the opening of the first mounting groove 25 and threadedly connected to the mounting part 24. The first connecting ring 43 abuts against the axial surface of the first protruding part 421. This makes the assembly process extremely intuitive. When assembling the inner knife tube 40 and the reciprocating lead screw 20, the worker only needs to insert the inner knife tube 40 into the through hole 23 of the inner ring 22, allowing the first protruding part 421 to easily enter the first mounting groove 25 through the opening. This operation is simple and clear, requiring no complicated positioning or calibration operations, greatly reducing the assembly difficulty. Subsequently, the first connecting ring 43 is fitted and tightened to complete the entire connection process.

[0061] It should be noted that the first connecting ring 43 includes a first sleeve portion sleeved on the mounting portion 24 and a first abutting portion integrally formed with the first sleeve portion. The first abutting portion and the first protrusion 421 abut against each other to restrict the forward and backward movement of the first protrusion 421.

[0062] Furthermore, the inner blade tube 40 includes a first working section 41 fitted inside the outer ring 21 and a first connecting section 42 with a first protrusion 421. The diameter of the first connecting section 42 is larger than the diameter of the first working section 41, and the first connecting section 42 is used to pass through the through hole 23. By dividing the inner blade tube 40 into the first working section 41 and the first connecting section 42 with different diameters, a clear functional division is achieved. The first working section 41 is responsible for performing cutting and other tasks, while the first connecting section 42 is specifically used for connecting with other components. The different diameter design of the first connecting section 42 and the first working section 41 provides clear assembly guidance for assembly workers. During the assembly process, workers can easily distinguish different parts of the inner blade tube 40 and accurately insert the first connecting section 42 into the through hole 23 of the inner ring 22, avoiding assembly errors caused by misoperation. The larger diameter of the first connecting section 42 is easier to grip during operation, making it easier for workers to accurately install the inner blade tube 40 into place. It also provides a larger contact area for the connection with the reciprocating screw 20, enhancing the stability and firmness of the connection.

[0063] It should be noted that in this embodiment, the first connecting segment 42 extends at least partially through the other end of the through hole 23 to ensure that it is surface-mounted during assembly. The protruding part provides intuitive visual guidance, making it easier and more accurate for other components to align and connect with it, reducing possible errors during assembly.

[0064] To facilitate the assembly and disassembly of the power handle 30, a second mounting groove 26 with an axial opening is provided at the opposite end of the inner ring 22 and the mounting part 24. The power shaft 31 of the power handle 30 has a second protruding part 32 protruding outward on its outer side. The power shaft 31 of the power handle 30 passes through the through hole 23 so that the second protruding part 32 enters the second mounting groove 26. During operation, the worker only needs to insert the power shaft 31 of the power handle 30 into the through hole 23 of the inner ring 22, and then the second protruding part 32 can naturally enter the second mounting groove 26. The whole process does not require complicated positioning operations or the use of special tools, which greatly reduces the assembly difficulty.

[0065] Furthermore, the rear end of the mounting base 10 is provided with a first connecting portion 12, and the outer side of the power handle 30 has an outwardly protruding third protrusion 33. A second connecting ring 34 is also fitted onto the power handle 30 for threaded connection with the first connecting portion 12 and for abutting the third protrusion 33 against the first connecting portion 12. This simplifies the assembly and disassembly process. By using the second connecting ring 34 to thread onto the first connecting portion 12 and for firmly abutting the third protrusion 33 against the first connecting portion 12, a secure connection between the power handle 30 and the mounting base 10 is ensured as much as possible. Simply insert the power handle 30 into the first connecting portion 12 at the rear end of the mounting base 10, align the third protrusion 33 correctly, and then rotate the second connecting ring 34 to complete the fixation. Conversely, when disassembly is required, simply rotate the second connecting ring 34 in the opposite direction to easily remove the power handle 30, greatly facilitating maintenance and replacement.

[0066] To facilitate the assembly and disassembly of the outer blade tube 50, the mounting base 10 has a second connecting portion 13 at its front end. The outer blade tube 50 has a fourth protruding portion 531 protruding outward on its outer side. A third connecting ring 51 is also fitted onto the outer blade tube 50 for threaded connection with the second connecting portion 13 and for abutting the fourth protruding portion 531 against the second connecting portion 13. This simplifies the assembly and disassembly process. The threaded connection between the third connecting ring 51 and the second connecting portion 13, and the tight abutting of the fourth protruding portion 531 against the second connecting portion 13, ensures a secure connection between the outer blade tube 50 and the mounting base 10. Simply insert the outer blade tube 50 into the second connecting portion 13 at the front end of the mounting base 10, align the fourth protruding portion 531 correctly, and then rotate the third connecting ring 51 to secure it. Conversely, when disassembly is required, simply rotate the third connecting ring 51 in the opposite direction to easily remove the outer blade tube 50, greatly facilitating maintenance and replacement.

[0067] The outer blade tube 50 includes a second working section 52 sleeved outside the inner blade tube 40 and a second connecting section 53 with a fourth protrusion 531. The diameter of the second connecting section 53 is larger than that of the second working section 52. The second connecting section 53 is inserted into the movable channel 11 so that the fourth protrusion 531 abuts against the second connecting part 13 to pre-position the outer blade tube 50. During assembly, workers can easily distinguish different parts of the outer blade tube 50. By inserting the second connecting section 53 into the movable channel 11 of the mounting base 10, the fourth protrusion 531 can quickly abut against the second connecting part 13 at the front end of the mounting base 10, achieving pre-positioning of the outer blade tube 50. Assemblers do not need to repeatedly adjust the position of the outer blade tube 50 during installation, and can quickly determine the approximate installation position of the outer blade tube 50, greatly reducing assembly time. It also provides a larger contact area between the second connecting section 53 and the mounting base 10, enhancing the stability and firmness of the connection.

[0068] It should be noted that both the first connecting part 12 and the second connecting part 13 are provided with external threads, which can more accurately align the connection and ensure that the connection is in place.

[0069] To facilitate the assembly and disassembly of the limiting block 60, the mounting base 10 has a positioning hole 14, a perimeter 15 protruding outward and surrounding the positioning hole 14, and a cover plate 16 closing the positioning hole 14. The positioning hole 14 is used for the limiting block 60 to be inserted into or removed from the helical groove 27 of the reciprocating screw 20. The perimeter 15 and the cover plate 16 together restrict the movement of the limiting block 60 in the front-back, left-right, and up-down directions. The design of the positioning hole 14 allows the limiting block 60 to be easily inserted into or removed from the helical groove 27 of the reciprocating screw 20, facilitating adjustment during initial assembly or subsequent maintenance. By using the edging 15 and the cover plate 16 together, the movement of the limit block 60 in the front-back, left-right, and up-down directions can be restricted more comprehensively. During the operation of the equipment, the reciprocating screw 20 will rotate and reciprocate at high speed. As a component that controls its movement trajectory, the limit block 60, through the above structural design, ensures as much as possible that the limit block 60 will not be displaced due to vibration or other external forces generated by the movement of the reciprocating screw 20, thereby ensuring the accuracy and stability of the movement of the reciprocating screw 20.

[0070] The cover plate 16 and the surrounding edge 15 are threaded together, which makes the assembly and disassembly process simple and direct. Fixing or removing the cover plate 16 can be accomplished simply by rotating it, without the need for additional tools.

[0071] It should be noted that the limiting block 60 can rotate with the helical groove 27 of the reciprocating screw 20. To make the rotation of the limiting block 60 more stable, a support ring 17 is also included within the area enclosed by the surrounding edge 15. The support ring 17 is sleeved on the limiting block 60 and rotatably connected to the surrounding edge 15. The presence of the support ring 17 provides additional support and guidance for the limiting block 60, effectively distributing the pressure on the limiting block 60 evenly across the entire support structure, ensuring its stability during rotation as much as possible. This helps reduce the offset or wobbling of the limiting block 60. The limiting block 60 can be a crescent pin.

[0072] During assembly, such as Figure 5 and Figure 6 The first step is as follows: the inner knife tube 40 is inserted into the reciprocating screw 20, and the inner knife tube 40 and the reciprocating screw 20 are connected as one unit by tightening the first connecting ring 43.

[0073] like Figure 7 and Figure 8 The second step is as follows: the reciprocating lead screw 20 is completely installed into the movable channel 11 of the mounting base 10;

[0074] like Figures 9 to 14 The third step is as follows: the limiting block 60 is inserted into the spiral groove 27 of the reciprocating screw 20 through the positioning hole 14, the support ring 17 is put on the limiting block 60, and the cover plate 16 and the surrounding edge 15 are threaded together to connect the limiting block 60 and the reciprocating screw 20.

[0075] like Figure 15 and Figure 16 As shown, in the fourth step: the outer blade tube 50 is fitted onto the inner blade tube 40, the second connecting section 53 is inserted into the movable channel 11, and then the third connecting ring 51 is tightened to connect the outer blade tube 50 and the mounting base 10.

[0076] like Figure 2 and Figure 3 As shown, in the fifth step: the power shaft 31 of the power handle 30 is inserted into the movable channel 11, so that the second protrusion 32 is engaged in the second mounting groove 26, and then the second connecting ring 34 is tightened to connect the power handle 30 and the mounting base 10.

[0077] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A modular reciprocating knife characterized by, The utility model provides a cutting machine, including mounting seat, reciprocating screw rod, power handle, inner cutter pipe and outer cutter pipe, the mounting seat has the activity channel that passes through before and after and the limiting piece in the activity channel, the outer cutter pipe sets up in the outer inner cutter pipe and can detachable installation in the front end of mounting seat, the power handle can detachable installation in the rear end of mounting seat, the inner cutter pipe with reciprocating screw rod can detachable connection as a whole, reciprocating screw rod packs into the activity channel, the power shaft of power handle packs into the activity channel and with reciprocating screw rod synchronous rotation, the limiting piece is limited in the spiral groove of reciprocating screw rod, reciprocating screw rod rotates while reciprocating before and after.

2. The modular reciprocating knife of claim 1, wherein, The reciprocating screw rod includes an outer ring having a spiral groove and an inner ring sleeved in the outer ring, the inner ring includes a through hole for the inner cutter pipe to pass through, and an installation portion axially protruding from the outer ring and used for detachable connection with the inner cutter pipe.

3. The modular reciprocating knife of claim 2, wherein, The installation portion is provided with a first installation slot having an axial opening, the inner cutter pipe has a first protruding portion protruding outward on the outer side thereof, the inner cutter pipe passes through the through hole so that the first protruding portion enters the first installation slot through the opening, and a first connecting ring is further sleeved on the inner cutter pipe and used for closing the opening of the first installation slot and threadedly connecting with the installation portion, and an axial surface of the first connecting ring abuts against the first protruding portion.

4. The modular reciprocating knife of claim 3, wherein, The inner cutter pipe includes a first working section sleeved in the outer ring and a first connecting section provided with the first protruding portion, a diameter of the first connecting section is greater than that of the first working section, and the first connecting section is used for passing through the through hole.

5. The modular reciprocating knife of claim 2, wherein, An opposite end of the inner ring and the installation portion is further provided with a second installation slot having an axial opening, the power shaft of the power handle has a second protruding portion protruding outward on the outer side thereof, and the power shaft of the power handle passes through the through hole so that the second protruding portion enters the second installation slot.

6. The modular reciprocating knife of claim 1, wherein, A first connecting portion is arranged at the rear end of the mounting seat, the power handle has a third protruding portion protruding outward on the outer side thereof, and a second connecting ring is further sleeved on the power handle and used for threadedly connecting with the first connecting portion and abutting the third protruding portion against the first connecting portion.

7. The modular reciprocating knife of claim 1, wherein, A second connecting portion is arranged at the front end of the mounting seat, the outer cutter pipe has a fourth protruding portion protruding outward on the outer side thereof, and a third connecting ring is further sleeved on the outer cutter pipe and used for threadedly connecting with the second connecting portion and abutting the fourth protruding portion against the second connecting portion.

8. The modular reciprocating knife of claim 7, wherein, The outer cutter pipe includes a second working section sleeved outside the inner cutter pipe and a second connecting section provided with the fourth protruding portion, a diameter of the second connecting section is greater than that of the second working section, the second connecting section is inserted into the activity channel so that the fourth protruding portion abuts against the second connecting portion to pre-position the outer cutter pipe.

9. The modular reciprocating knife of claim 1, wherein, The mounting seat has a positioning hole, a surrounding edge protruding outward and surrounding the positioning hole, and a cover plate closing the positioning hole, the positioning hole is used for allowing the limiting piece to pack into or move out of the spiral groove of the reciprocating screw rod, and the surrounding edge and the cover plate surround to limit the movement of the limiting piece in the front-back direction, the left-right direction and the up-down direction.

10. The modular reciprocating knife of claim 9, wherein, The cover plate and the surrounding edge are threadedly connected.

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