CN212635061U

CN212635061U - Split double-screw self-defined heart flat tongs

Info

Publication number: CN212635061U
Application number: CN202021161286.9U
Authority: CN
Inventors: 樊艳龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-03-02
Anticipated expiration: 2030-06-19

Abstract

The utility model belongs to the technical field of clamps, in particular to split type double-screw self-defined center flat tongs, which comprises a mounting seat, two clamping blocks and a screw component for connecting the two clamping blocks, wherein the mounting seat is provided with a guide chute, and the bottoms of the two clamping blocks are provided with a connecting part in sliding fit with the guide chute; a left-handed screw hole is formed in the connecting part at the bottom of one clamping block, and a right-handed screw hole is formed in the connecting part at the bottom of the other clamping block; a connecting seat is fixedly arranged in the guide chute; the screw component comprises a left-handed screw, a right-handed screw and a transmission piece; the left-handed screw is connected with the left-handed screw hole, and the right-handed screw is connected with the right-handed screw hole; the left-handed screw and the right-handed screw are both rotationally connected with the connecting seat, a limiting cavity is arranged in the connecting seat, a first limiting part which is limited in the limiting cavity is arranged at one end of the left-handed screw, and a second limiting part which is limited in the limiting cavity is arranged at one end of the right-handed screw; and the left-handed screw and the right-handed screw are provided with transmission parts for transmission of the left-handed screw and the right-handed screw.

Description

Split double-screw self-defined heart flat tongs

Technical Field

The utility model belongs to the technical field of anchor clamps, especially, relate to a self-defined heart flat tongs of split type twin-screw.

Background

Self-centering flat tongs are commonly used in CNC machining equipment for gripping and centering a workpiece. Chinese patent document, CN203390762U, discloses a self-centering vice, specifically discloses: the lead screw is equipped with axial positioning component and radial positioning component, and the axial positioning component includes constant head tank and locating pin, and the radial positioning component includes the latch closure. The ring buckle is sleeved on the screw rod, so that the radial degree of freedom of the screw rod can be limited, the screw rod can only axially move and rotate around a shaft, and the radial positioning is realized. The positioning pins are arranged on two sides of the positioning groove and matched with the ring buckles, so that the screw rod is axially positioned relative to the base, the degree of freedom of axial movement of the screw rod is limited, and the screw rod can only rotate around a shaft. Support the lead screw through the latch closure, however at actual in-process, there is the clearance when lead screw and latch closure cooperation to through wearing and tearing, can increase clearance between them, consequently lead to the lead screw to have wobbling phenomenon with the latch closure, drive through the lead screw and keep silent and press from both sides tight work piece after, at the cutting force through CNC processing cutter, can cause the work piece to rock, consequently reduce the machining precision of work piece.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a self-defined heart flat-nose pliers of split type twin-screw aims at solving present current centering flat-nose pliers and after pressing from both sides tight work piece, there is the problem of rocking in the lead screw.

In order to achieve the purpose, the split double-screw self-defined center flat tongs provided by the embodiment of the utility model comprises a mounting seat, two clamping blocks and a screw component for connecting the two clamping blocks, wherein the mounting seat is provided with a guide chute, and the bottoms of the two clamping blocks are provided with a connecting part in sliding fit with the guide chute; the connecting part at the bottom of one clamping block is provided with a left-handed screw hole, and the connecting part at the bottom of the other clamping block is provided with a right-handed screw hole; a connecting seat is fixedly arranged in the guide chute; the screw assembly comprises a left-handed screw and a right-handed screw; the left-handed screw is connected with the left-handed screw hole, and the right-handed screw is connected with the right-handed screw hole; the left-handed screw and the right-handed screw are both rotationally connected with the connecting seat, a limiting cavity is arranged in the connecting seat, a first limiting part which is limited in the limiting cavity is arranged at one end of the left-handed screw, and a second limiting part which is limited in the limiting cavity is arranged at one end of the right-handed screw; a transmission part is arranged between the left-handed screw and the right-handed screw and is used for transmission of the left-handed screw and the right-handed screw; the two clamping blocks clamp the workpiece, so that the first limiting part is tightly attached to one inner side of the limiting cavity, and the second limiting part is tightly attached to the other side of the limiting cavity.

Furthermore, the end part of the left-handed screw or the right-handed screw is provided with a connecting hole position, the transmission part is in sliding fit with the connecting hole at one end, and the other end of the transmission part is connected with the right-handed screw or the left-handed screw.

Furthermore, the end parts of the left-handed screw and the right-handed screw are respectively provided with a connecting hole position, and the transmission part is in sliding fit with the two connecting holes.

Furthermore, at least one poking surface is arranged in the connecting hole position at the end part of the left-handed screw and the right-handed screw, and the transmission part is provided with a matching surface which is attached to the poking surface in the connecting hole position.

Further, the driving medium includes first connecting piece and second connecting piece, first connecting piece with the levogyration screw rod is connected, the second connecting piece with the dextrorotation screw rod is connected, first connecting piece with the second connecting piece is equipped with the plane of laminating each other.

Furthermore, an open slot is formed in the end of the first connecting piece, and the second connecting piece slidably extends into the open slot.

Furthermore, the first limiting part is provided with at least one pin hole, and the second limiting part is provided with a pin which extends into the pin hole in a sliding manner.

Further, the connecting seat comprises a base and an upper seat, the base is fixedly installed in the guide sliding groove, a first limiting cavity and two first semicircular holes are formed in the top end of the base, and the two first semicircular holes are located on two sides of the first limiting cavity; the bottom of seat of honour is provided with the spacing chamber of second and two second semicircle orifices, two the second semicircle orifice is located the both sides in the spacing chamber of second, the seat of honour is fixed to be set up on the base, make the spacing chamber of second with first spacing chamber forms spacing cavity, two the second semicircle orifice with correspond first semicircle orifice forms the mounting hole, levogyration screw rod with dextrorotation screw rod with correspond the mounting hole is connected.

Furthermore, the connecting seat comprises two supporting plates which are oppositely and fixedly arranged in the guide sliding groove, and a gap between the two supporting plates forms the limit cavity; the left-handed screw and the right-handed screw are rotationally connected with the corresponding support plates.

Further, the direction spout is T type groove, the upper end of connecting portion is equipped with spacing and is in the spacing step of T type groove roof.

Further, the mounting seat comprises a seat body and two limiting seats, the two limiting seats are oppositely arranged on the seat body, and the two limiting seats form the guide sliding groove.

Furthermore, two positioning grooves are formed in the top of the seat body, the two limiting seats are positioned in the corresponding positioning grooves, and locking screws penetrate through the seat body from the bottom of the seat body and are connected with the limiting seats.

Furthermore, the inner side walls of the two limiting seats are provided with clamping grooves, two ends of the connecting seat are positioned in the corresponding clamping grooves, and the top wall of each clamping groove limits the connecting seat in the guide sliding groove.

Furthermore, the connecting hole positions of the end parts of the left-handed screw and the right-handed screw are hexagonal holes, and the transmission part is a hexagonal shaft.

Furthermore, the end parts of the left-handed screw and the right-handed screw are mutually attached.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the self-defined heart flat-nose pliers of split type twin-screw has following technological effect at least:

1. the split double-screw self-defined heart flat tongs are fixedly arranged on a workbench of the processing equipment; when a workpiece is clamped, any one of the left-handed screw rod or the right-handed screw rod is rotated, the other screw rod is driven to rotate by the transmission part, the left-handed screw rod is matched with the left-handed screw hole, the right-handed screw rod is matched with the right-handed screw hole, the two clamping blocks slide oppositely along the guide chute to clamp the workpiece, after the workpiece is clamped, the workpiece can give a reaction force to the corresponding clamping blocks, the corresponding clamping blocks can transmit the reaction force to the corresponding screw rods, the left-handed screw rod and the right-handed screw rod can move in the opposite direction for clamping the workpiece, so that the first limiting part of the left-handed screw rod is tightly attached to the inner wall of the limiting cavity, the second limiting part of the right-handed screw rod is tightly attached to the other inner side wall of the limiting cavity, when the left-handed screw rod and the right-handed screw rod are clamped, the end parts of, the problem of workpiece looseness is caused, so that the machining precision of the workpiece is ensured;

2. because when clamping, the screw rod that corresponds is taut through the reaction force of work piece, therefore the precision requirement of the cooperation of levogyration screw rod and dextrorotation screw rod and connecting seat is lower than the cooperation precision requirement of prior art flat tongs, consequently can reduce holistic cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a perspective view of split type twin-screw self-defined heart flat tongs provided by the embodiment of the utility model.

Figure 2 is the embodiment of the utility model provides a self-defined heart flat-nose pliers of split type twin-screw the structure chart that screw assembly and connecting seat are connected.

Fig. 3 is a sectional view of the split type twin-screw self-defined heart flat tongs provided by the embodiment of the utility model.

Fig. 4 is a cross-sectional view of the split type twin-screw self-defined heart flat tongs provided by the embodiment of the utility model.

Fig. 5 is an exploded view of the split type twin-screw self-defined heart flat tongs provided by the embodiment of the utility model.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the present invention, a split type twin-screw self-defined flat tongs comprises a mounting base 100, two clamping blocks 200, 201, and a screw assembly 300 connecting the two clamping blocks 200, 201, please refer to fig. 1-5. The mounting seat 100 is provided with a guide sliding groove 101, and the bottoms of the two clamping blocks 200 and 201 are provided with connecting

parts

210 and 220 in sliding fit with the guide sliding groove 101. The connecting part 210 at the bottom of the clamping block 200 is provided with a left-handed screw hole 211, and the connecting part 220 at the bottom of the clamping block 201 is provided with a right-handed screw hole 221. A connecting seat 400 is fixedly arranged in the guide chute 101; the screw assembly 300 includes a left-hand screw 310, a right-hand screw 320, and a driver 330. The left-handed screw 310 is connected with the left-handed screw hole 211, and the right-handed screw 320 is connected with the right-handed screw hole 221; the left-handed screw 310 and the right-handed screw 320 are both rotatably connected with the connecting seat 400, a limiting cavity 401 is arranged in the connecting seat 400, a first limiting part 311 which is limited in the limiting cavity 401 is arranged at one end of the left-handed screw 310, and a second limiting part 321 which is limited in the limiting cavity 401 is arranged at one end of the right-handed screw 320; a transmission piece 330 is arranged between the left-handed screw 310 and the right-handed screw 320 and is used for transmission between the left-handed screw 310 and the right-handed screw 320. The split type double-screw self-defined heart flat tongs of the embodiment is fixedly arranged on a workbench of processing equipment; when clamping a workpiece, rotating either one of the left-handed screw 310 or the right-handed screw 320, driving the other screw to rotate through the transmission part 330, matching the left-handed screw 310 with the left-handed screw hole 211, matching the right-handed screw 320 with the right-handed screw hole 221, so that the two clamping blocks 200 and 201 slide in opposite directions along the guide chute 101 to clamp the workpiece, after the workpiece is clamped, the workpiece will give a reaction force to the corresponding clamping blocks 200 and 201, and the corresponding clamping blocks 200 and 201 will transmit the reaction force to the corresponding screws, so that the left-handed screw 310 and the right-handed screw 320 will displace in opposite directions to clamp the workpiece, and further the first limiting part 311 of the left-handed screw 310 will cling to the inner wall of the limiting cavity 401, and the second limiting part 321 of the right-handed screw 320 will cling to the other inner wall of the limiting cavity 401, so that when clamping the workpiece, the left-handed screw 310 and the right, the end parts of the left-handed screw 310 and the right-handed screw 320 are fixed on the connecting seat 400 in a limiting way through the first limiting part 311 and the second limiting part 321, and the two clamping blocks 200 and 201 are kept fixed under the acting force of the left-handed screw 310, the right-handed screw 320 and the workpiece, so that the problem of workpiece looseness caused by clamping the workpiece is avoided, and the machining precision of the workpiece is guaranteed. And, because the corresponding screw rod is tightened by the reaction force of the workpiece during clamping, the precision requirement of the matching of the left-handed screw rod 310 and the right-handed screw rod 320 with the connecting seat 400 is lower than that of the flat tongs in the prior art, and the whole cost can be reduced.

Further, the end of the left-handed screw 310 is provided with a connecting hole, the transmission member 330 is in sliding fit with the connecting hole at one end, and the other end is connected with the right-handed screw 320. Furthermore, the transmission member and the right-handed screw 320 are integrated, and in this embodiment, the transmission member 330 is engaged with the connection hole, so that when one screw is rotated, the other screw is rotated synchronously, and the two screws can move relatively in the axial direction.

Further, the connecting hole is a polygonal hole or a spline hole, and the transmission member 330 is a polygonal shaft or a spline shaft that is slidably fitted in the polygonal hole.

In another embodiment of the transmission member 330, the ends of the left-handed screw 310 and the right-handed screw 320 are both provided with a connection hole, and the transmission member 330 is in sliding fit with the two connection holes. Furthermore, referring to fig. 4, at least one plane is disposed in the connection hole locations at the end portions of the left-handed screw 310 and the right-handed screw 320, and the transmission member 330 is disposed with a second plane attached to the plane of the connection hole location. In this embodiment, the second plane of the transmission member 330 is attached to the plane of the connection hole, so that when the left-handed screw 310 or the right-handed screw 320 rotates, the other screw can be driven to rotate synchronously. Further, the connecting hole is a hexagonal hole, and the transmission member 330 is a hexagonal shaft.

Further, in another embodiment (shown in the drawing) of the transmission member 330, the transmission member 330 includes a first connecting member and a second connecting member, the first connecting member is connected to the left-handed screw 310, the second connecting member is connected to the right-handed screw 320, and the first connecting member and the second connecting member are provided with planes attached to each other. In this embodiment, the planes of the first connecting piece and the second connecting piece are mutually attached, so that when one screw rod is rotated, the other screw rod is driven to synchronously rotate through the two mutually attached planes. In order to increase the stability of transmission, the tip of first connecting piece is provided with the open slot, and the second connecting piece stretches into in the open slot slidingly.

Further, in another embodiment (shown in the drawings) of the transmission member 330, the first limiting portion 311 is provided with at least one pin hole, and the second limiting portion 321 is provided with a pin slidably extending into the pin hole. In this embodiment, when one screw rotates, the other screw is shifted by the pin to rotate synchronously. Preferably, there are two pin holes disposed at the end of the first limiting portion 311, and two pins disposed at the end of the second limiting portion 321 and extending into the corresponding pin holes.

Further, referring to fig. 2 to 5, the connecting seat 400 includes a base 410 and an upper seat 420, the base 410 is fixedly installed in the guide chute 101, a first limiting cavity and two first semicircular holes are formed at the top end of the base 410, and the two first semicircular holes are located at two sides of the first limiting cavity; the bottom of seat of honour 420 is provided with the spacing chamber of second and two second semicircle orifices, two the second semicircle orifice is located the both sides in the spacing chamber of second, seat of honour 420 is fixed to be set up on base 410, make the spacing chamber of second with first spacing chamber forms spacing cavity 401, two the second semicircle orifice with correspond first semicircle orifice forms mounting hole 402, 403, levogyration screw rod 310 with dextrorotation screw rod 320 with correspond the mounting hole is connected. In this embodiment, during assembly, the ends of the left-handed screw 310 and the right-handed screw 320 are disposed in the corresponding first semicircles, and the first limiting portion 311 and the second limiting portion 321 are limited in the first limiting cavity, and when the upper seat 420 is fixed on the base 410, the mounting hole formed by combining the upper seat 420 and the base 410 is rotatably connected with the left-handed screw 310 and the right-handed screw 320, and the second limiting cavity and the first limiting cavity form the limiting cavity 401, which limits the first limiting portion 311 and the second limiting portion 321.

Further, the connecting seat 400 includes two supporting plates (not shown in the drawings) relatively fixed in the guiding chute 101, and a gap between the two supporting plates forms the limiting cavity; the left-handed screw 310 and the right-handed screw 320 are rotatably connected with the corresponding support plates. In this embodiment, rotate with the screw rod that corresponds through two backup pads and be connected to it is spacing to first spacing portion and second spacing portion respectively.

Further, referring to fig. 1, the guide chute 101 is a T-shaped groove, and the upper ends of the connecting

portions

210 and 220 are provided with a limiting step limiting the top wall of the T-shaped groove. In this embodiment, the two clamping blocks 200 and 201 are limited by the top wall of the T-shaped groove, and when the workpiece is clamped by the two clamping blocks 200 and 201, the clamping blocks 200 and 201 are limited by the top wall of the T-shaped groove, so that the workpiece is clamped.

Further, referring to fig. 5, the mounting base 100 includes a base body 110 and two limiting bases 120, the two limiting bases 120 are oppositely disposed on the base body 110, and the two limiting bases 120 form the guide chute 101. In this embodiment, through two mutually independent spacing left 120 fixed mounting on pedestal 110, consequently make whole result simple structure, the handling capacity is little, has reduced holistic processing cost.

Further, referring to fig. 5, two positioning grooves 111 are formed in the top of the seat body 110, the two limiting seats 120 are positioned in the corresponding positioning grooves 111, and a locking screw penetrates through the seat body 110 from the bottom of the seat body 100 to be connected with the limiting seats 120. In this embodiment, the positioning groove 111 is used to improve the accuracy of the positioning seat 120 installed on the seat body 110.

Further, referring to fig. 5, the inner side walls of the two limiting seats 120 are provided with clamping grooves 121, two ends of the connecting seat 400 are positioned in the corresponding clamping grooves 121, and the top wall of the clamping groove 121 limits the connecting seat 400 in the guide sliding groove 101. In this embodiment, the connecting seat 400 is positioned and limited by the clamping groove 121, and the installation accuracy and stability of the connecting seat 400 can be improved.

Further, referring to fig. 2 and 5, the ends of the left-handed screw 310 and the right-handed screw 320 are attached to each other. In this embodiment, the space of the limiting cavity 401 can be reduced, and the width of the connecting seat 400 is further reduced.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A split type double-screw self-defined heart flat tongs comprises a mounting seat, two clamping blocks and a screw assembly for connecting the two clamping blocks, wherein a guide sliding groove is formed in the mounting seat, and a connecting part in sliding fit with the guide sliding groove is formed in the bottom of each clamping block; the clamping device is characterized in that the connecting part at the bottom of one clamping block is provided with a left-handed screw hole, and the connecting part at the bottom of the other clamping block is provided with a right-handed screw hole; a connecting seat is fixedly arranged in the guide chute; the screw assembly comprises a left-handed screw and a right-handed screw; the left-handed screw is connected with the left-handed screw hole, and the right-handed screw is connected with the right-handed screw hole; the left-handed screw and the right-handed screw are both rotationally connected with the connecting seat, a limiting cavity is arranged in the connecting seat, a first limiting part which is limited in the limiting cavity is arranged at one end of the left-handed screw, and a second limiting part which is limited in the limiting cavity is arranged at one end of the right-handed screw; a transmission part is arranged between the left-handed screw and the right-handed screw and is used for transmission of the left-handed screw and the right-handed screw; the two clamping blocks clamp the workpiece, so that the first limiting part is tightly attached to one inner side of the limiting cavity, and the second limiting part is tightly attached to the other side of the limiting cavity.

2. The split twin-screw custom heart flat tongs according to claim 1, characterized in that: the end part of the left-handed screw or the right-handed screw is provided with a connecting hole position, the transmission part is in sliding fit with the connecting hole at one end, and the other end of the transmission part is connected with the right-handed screw or the left-handed screw.

3. The split twin-screw custom heart flat tongs according to claim 1, characterized in that: the end parts of the left-handed screw and the right-handed screw are respectively provided with a connecting hole position, and the transmission part is in sliding fit with the two connecting holes.

4. The split twin-screw custom heart flat tongs according to claim 3, characterized in that: the left-handed screw and the right-handed screw are provided with at least one poking surface in the connecting hole site, and the driving member is provided with a matching surface which is attached to the poking surface in the connecting hole site.

5. The split twin-screw custom heart flat tongs according to claim 1, characterized in that: the driving medium includes first connecting piece and second connecting piece, first connecting piece with the levogyration screw rod is connected, the second connecting piece with the dextrorotation screw rod is connected, first connecting piece with the second connecting piece is equipped with the plane of laminating each other.

6. The split twin-screw custom heart flat tongs according to claim 5, characterized in that: the end part of the first connecting piece is provided with an open slot, and the second connecting piece slidingly extends into the open slot.

7. The split twin-screw custom heart flat tongs according to claim 1, characterized in that: the first limiting portion is provided with at least one pin hole, and the second limiting portion is provided with a pin which extends into the pin hole in a sliding mode.

8. The split twin-screw custom cardiotomy flat-nose pliers according to any one of claims 1-7, characterized in that: the connecting seat comprises a base and an upper seat, the base is fixedly installed in the guide sliding groove, a first limiting cavity and two first semicircular holes are formed in the top end of the base, and the two first semicircular holes are located on two sides of the first limiting cavity; the bottom of seat of honour is provided with the spacing chamber of second and two second semicircle orifices, two the second semicircle orifice is located the both sides in the spacing chamber of second, the seat of honour is fixed to be set up on the base, make the spacing chamber of second with first spacing chamber forms spacing cavity, two the second semicircle orifice with correspond first semicircle orifice forms the mounting hole, levogyration screw rod with dextrorotation screw rod with correspond the mounting hole is connected.

9. The split twin-screw custom cardiotomy flat-nose pliers according to any one of claims 1-7, characterized in that: the connecting seat comprises two supporting plates which are oppositely and fixedly arranged in the guide sliding groove, and a gap between the two supporting plates forms the limiting cavity; the left-handed screw and the right-handed screw are rotationally connected with the corresponding support plates.

10. The split twin-screw custom cardiotomy flat-nose pliers according to any one of claims 1-7, characterized in that: the guide sliding groove is a T-shaped groove, and the upper end of the connecting portion is provided with a limiting step which is limited on the top wall of the T-shaped groove.

11. The split twin-screw custom cardiotomy flat-nose pliers according to any one of claims 1-7, characterized in that: the mounting seat comprises a seat body and two limiting seats, the two limiting seats are oppositely arranged on the seat body, and the two limiting seats form the guide sliding groove.

12. The split twin-screw custom heart flat tongs according to claim 11, characterized in that: the top of the seat body is provided with two positioning grooves, the two limiting seats are positioned in the corresponding positioning grooves, and the locking screws penetrate through the seat body from the bottom of the seat body and are connected with the limiting seats.

13. The split twin-screw custom heart flat tongs according to claim 11, characterized in that: the inner side walls of the two limiting seats are provided with clamping grooves, two ends of the connecting seat are positioned in the corresponding clamping grooves, and the top wall of each clamping groove limits the connecting seat in the guide sliding groove.

14. The split twin-screw custom cardiotomy flat-nose pliers according to any one of claims 1-7, characterized in that: the connecting hole positions of the end parts of the left-handed screw and the right-handed screw are hexagonal holes, and the transmission part is a hexagonal shaft.

15. The split twin-screw custom cardiotomy flat-nose pliers according to any one of claims 1-7, characterized in that: the end parts of the left-handed screw and the right-handed screw are mutually attached.