CN216706112U

CN216706112U - Cutting device is used in production of two screw thread pressurization locking interlocking intramedullary nail

Info

Publication number: CN216706112U
Application number: CN202220181907.2U
Authority: CN
Inventors: 吴江; 张徐晨; 戚珊红
Original assignee: Shanghai Jinshan Tinglin Hospital
Current assignee: Shanghai Jinshan Tinglin Hospital
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-06-10
Anticipated expiration: 2032-01-24

Abstract

The utility model discloses a cutting device for producing a double-thread pressure locking interlocking intramedullary nail, which comprises a cutting seat, wherein the top of the cutting seat is fixedly connected with a fixing sleeve, the fixing sleeve is fixedly connected with a pneumatic box, the interior of the fixing sleeve is fixedly connected with a pneumatic plate, the bottom of the pneumatic plate is fixedly connected with a first spring, the other end of the first spring is fixedly connected with the inner wall of the bottom of the pneumatic box, the top of the pneumatic plate is fixedly connected with a toothed bar, the top of the toothed bar is fixedly connected with a placing plate, the inner side of the fixing sleeve is fixedly connected with a ring-shaped pipe, the ring-shaped pipe is connected with a pipeline of the pneumatic box, the inner side of the ring-shaped pipe is connected with a clamping box, the interior of the clamping box is fixedly connected with a piston plate, the inner side of the piston plate is fixedly connected with a clamping rod, and the other end of the clamping rod is fixedly connected with a clamping plate, the utility model has the characteristics of automatic cutting and quick clamping.

Description

Cutting device is used in production of two screw thread pressurization locking interlocking intramedullary nail

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a cutting device for producing a double-thread pressure locking interlocking intramedullary nail.

Background

When bone fracture of diaphysis is treated in orthopaedics, an intramedullary nail is usually arranged in a medullary cavity of the diaphysis to connect and fix a fractured end. With the improvement of the internal fixation technology of fracture, the intramedullary nail with lock appears, the bending, twisting, shearing and screwing stress of the fracture end is effectively controlled, the fracture non-healing rate is greatly reduced, and the infection rate is reduced. But the fracture is still not healed and delayed healing or the fracture is caused after internal fixation is removed due to the stress shielding of the intramedullary nail.

This neotype intramedullary nail locking nail is the design of progressive increase, and both ends design screw thread, and the middle part is circular smooth rod-shaped, and the design of the progressive increase of intramedullary nail hole matching locking nail. During operation, a small drill is used for drilling through cortex of two sides, and a thick drill is used for enlarging cortex of near side. Before the locking nail is screwed into the lock hole, a locking nail can be arranged in the lock hole vertical to the lock hole, so that the intramedullary nail is prevented from swinging in the medullary cavity, and the locking and pressurizing are convenient. The in-process that the locking nail twisted, the screw is through both sides cortex pressurization, and the clearance between locking nail and the lockhole dwindles gradually, realizes the locking of locking nail and lockhole under the torsional force effect and fixes, because the bone has the size, consequently need cut the diameter that adapts to the bone to the intramedullary nail when production.

The existing double-thread pressure locking interlocking intramedullary nail cutting device needs manual cutting, and is troublesome to fix before cutting and poor in practicability. Therefore, it is necessary to design a cutting device for the production of double-thread pressure-locked interlocking intramedullary nails which can automatically cut and rapidly clamp.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cutting device for producing a double-thread pressure locking interlocking intramedullary nail, which aims to solve the problems in the background technology.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a cutting device is used in production of double thread pressurization locking interlocking intramedullary nail, includes the cutting seat, the fixed cover of top fixedly connected with of cutting seat, fixed cover, the inside fixedly connected with pneumatic chamber of fixed cover, the inside sliding connection of pneumatic chamber has the pneumatic plate, the bottom fixedly connected with spring one of pneumatic plate, the other end of spring one and the bottom inner wall fixed connection of pneumatic chamber, the top fixedly connected with rack bar of pneumatic plate.

According to the technical scheme, the board is placed to the top fixedly connected with of ratch, the inboard fixedly connected with ring pipe of fixed cover, ring pipe and pneumatic tank pipe connection, the inboard pipe connection of ring pipe has the centre gripping case, the inside sliding connection of centre gripping case has the piston plate, the inboard fixedly connected with supporting rod of piston plate, the other end fixedly connected with grip block of supporting rod.

According to the technical scheme, the inner side of the top of the air pressure box is connected with the limiting teeth in a sliding mode, the right side of the limiting teeth is fixedly connected with the baffle, the inner side of the baffle is fixedly connected with the second spring, and the other end of the second spring is fixedly connected with the outer side of the air pressure box.

According to the technical scheme, the top fixedly connected with support frame of cutting seat, the top fixedly connected with backup pad of support frame, the bottom sliding connection of backup pad has the slider, the right side fixedly connected with cylinder one of slider, the other end and the support frame fixed connection of cylinder one, the bottom fixedly connected with cylinder two of slider, the bottom fixedly connected with cutting machine of cylinder two, the left side bearing of cutting machine is connected with the cutting piece.

Compared with the prior art, the utility model has the following beneficial effects:

(1) the intramedullary nail is plugged into the inner side of the clamping plate and placed on the placing plate through the clamping box and the air pressure box, the intramedullary nail is pressed forcibly, the intramedullary nail drives the placing plate to move downwards, the placing plate drives the toothed bar to move downwards, the toothed bar drives the air pressure plate to slide downwards in the air pressure box and extrude internal air, the air pressure plate compresses a spring to generate elastic deformation, the gas is transmitted into the annular tube, the gas in the annular tube is transmitted into the clamping box, the gas pushes the piston plate to slide in the clamping box, the piston plate drives the clamping rod to move inwards, and the clamping rod drives the clamping plate to clamp the intramedullary nail;

(2) by the arrangement of the toothed rod and the limiting teeth, when the toothed rod moves downwards, the toothed rod extrudes the limiting teeth to slide outwards, the limiting teeth drive the baffle to move outwards, the baffle tension spring II generates elastic deformation, when the toothed rod stops moving downwards, the spring II deforms and rebounds, the spring II drives the baffle to reset, the baffle drives the limiting teeth to reset and clamp the toothed rod, and through the steps, the effect of limiting the toothed rod is achieved, and the toothed rod is prevented from moving upwards to influence the clamping of the intramedullary nail;

(3) through being provided with cylinder one and cylinder two, start the cutting machine, the cutting machine drives the cutting piece and rotates, and control cylinder two, cylinder two drive the cutting machine and move down, and control cylinder one, cylinder drive slider slide left, and the slider drives the cutting machine on the cylinder two and removes left and cuts, through above-mentioned step to reach quick automatic cutout's effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic overall elevational view of the present invention;

fig. 2 is a schematic perspective view of the pouch of the present invention;

fig. 3 is a front sectional structural view of the fixing cover of the present invention;

FIG. 4 is an enlarged partial schematic view of area A of FIG. 3;

fig. 5 is a schematic top cross-sectional view of the pouch of the present invention;

in the figure: 1. a cutting seat; 3. a support frame; 4. a support plate; 5. a slider; 6. a first cylinder; 7. a second air cylinder; 8. a cutter; 9. cutting the slices; 10. fixing a sleeve; 11. an annular tube; 12. a clamping box; 13. a clamping rod; 14. a clamping plate; 15. placing the plate; 16. a rack bar; 17. an air pressure box; 18. a gas pressure plate; 19. a first spring; 20. a second spring; 21. limiting teeth; 22. a baffle plate; 23. a piston plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides the following technical solutions: a cutting device for producing double-thread pressure locking interlocking intramedullary nails comprises a cutting seat 1, wherein the top of the cutting seat 1 is fixedly connected with a fixed sleeve 10, the fixed sleeve 10 is fixedly connected with an air pressure box 17 inside the fixed sleeve 10, the air pressure box 17 is connected with an air pressure plate 18 inside in a sliding manner, the bottom of the air pressure plate 18 is fixedly connected with a first spring 19, the other end of the first spring 19 is fixedly connected with the inner wall of the bottom of the air pressure box 17, and the top of the air pressure plate 18 is fixedly connected with a toothed bar 16;

the top of the toothed bar 16 is fixedly connected with a placing plate 15, the inner side of the fixed sleeve 10 is fixedly connected with a circular tube 11, the circular tube 11 is connected with a pneumatic box 17 through a pipeline, the inner side of the circular tube 11 is connected with a clamping box 12, the inner side of the clamping box 12 is connected with a piston plate 23 in a sliding manner, the inner side of the piston plate 23 is fixedly connected with a clamping rod 13, the other end of the clamping rod 13 is fixedly connected with a clamping plate 14, an intramedullary nail is inserted into the inner side of the clamping plate 14 and placed on the placing plate 15, the intramedullary nail is pressed forcibly, the intramedullary nail drives the placing plate 15 to move downwards, the placing plate 15 drives the toothed bar 16 to move downwards, the toothed bar 16 drives the pneumatic plate 18 to slide downwards in the pneumatic box 17 and extrude internal air, the first compression spring 19 of the pneumatic plate 18 generates elastic deformation, the air is transmitted into the circular tube 11, the air in the circular tube 11 is transmitted into the clamping box 12, and the air pushes the piston plate 23 to slide in the clamping box 12, the piston plate 23 drives the clamping rod 13 to move inwards, and the clamping rod 13 drives the clamping plate 14 to clamp the intramedullary nail, so that the effects of quick clamping and convenient cutting are achieved through the steps;

the inner side of the top of the air pressure box 17 is connected with a limiting tooth 21 in a sliding mode, the right side of the limiting tooth 21 is fixedly connected with a baffle 22, the inner side of the baffle 22 is fixedly connected with a second spring 20, the other end of the second spring 20 is fixedly connected with the outer side of the air pressure box 17, when the toothed bar 16 moves downwards, the toothed bar 16 extrudes the limiting tooth 21 to slide outwards, the limiting tooth 21 drives the baffle 22 to move outwards, the second spring 20 stretches the second spring 20 to generate elastic deformation, when the toothed bar 16 stops moving downwards, the second spring 20 deforms and rebounds, the second spring 20 drives the baffle 22 to reset, the baffle 22 drives the limiting tooth 21 to reset and clamp the toothed bar 16, and through the steps, the effect of limiting the toothed bar 16 is achieved, and the toothed bar 16 is prevented from moving upwards to influence the clamping of the intramedullary nail;

cutting seat 1's top fixedly connected with support frame 3, the top fixedly connected with backup pad 4 of support frame 3, the bottom sliding connection of backup pad 4 has slider 5, right side fixedly connected with cylinder 6 of slider 5, the other end and support frame 3 fixed connection of cylinder 6, bottom fixedly connected with cylinder two 7 of slider 5, the bottom fixedly connected with cutting machine 8 of cylinder two 7, the left side bearing of cutting machine 8 is connected with cutting piece 9, start cutting machine 8, cutting machine 8 drives cutting piece 9 and rotates, control cylinder two 7, cylinder two 7 drives cutting machine 8 and moves down, control cylinder one 6, cylinder one 6 drives slider 5 and slides left, slider 5 drives cutting machine 8 on the cylinder two 7 and removes left and cuts, through the above-mentioned step, thereby reach quick automatic cutout's effect.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a cutting device is used in production of double thread pressurization locking interlocking intramedullary nail, includes cutting seat (1), its characterized in that: the utility model discloses a cutting seat, including cutting seat (1), the fixed cover of top fixedly connected with (10), fixed cover (10), the inside fixedly connected with pneumatic chamber (17) of fixed cover (10), the inside sliding connection of pneumatic chamber (17) has pneumatic plate (18), the bottom fixedly connected with spring (19) of pneumatic plate (18), the other end of spring (19) and the bottom inner wall fixed connection of pneumatic chamber (17), the top fixedly connected with rack bar (16) of pneumatic plate (18).

2. The cutting device for producing double-thread pressure-locked interlocking intramedullary nails of claim 1, wherein: board (15) are placed to the top fixedly connected with of ratch (16), inboard fixedly connected with ring pipe (11) of fixed cover (10), ring pipe (11) and pneumatic chamber (17) pipe connection, the inboard pipe connection of ring pipe (11) has centre gripping case (12), the inside sliding connection of centre gripping case (12) has piston plate (23), the inboard fixedly connected with holding rod (13) of piston plate (23), the other end fixedly connected with grip block (14) of holding rod (13).

3. The cutting device for producing double-thread pressure-locked interlocking intramedullary nails of claim 2, wherein: the inner side of the top of the air pressure box (17) is connected with limiting teeth (21) in a sliding mode, a baffle (22) is fixedly connected to the right side of the limiting teeth (21), a second spring (20) is fixedly connected to the inner side of the baffle (22), and the other end of the second spring (20) is fixedly connected with the outer side of the air pressure box (17).

4. The cutting device for producing double-thread pressure-locked interlocking intramedullary nails of claim 3, wherein: the top fixedly connected with support frame (3) of cutting seat (1), top fixedly connected with backup pad (4) of support frame (3), the bottom sliding connection of backup pad (4) has slider (5), the right side fixedly connected with cylinder (6) of slider (5), the other end and support frame (3) fixed connection of cylinder (6), the bottom fixedly connected with cylinder two (7) of slider (5), the bottom fixedly connected with cutting machine (8) of cylinder two (7), the left side bearing of cutting machine (8) is connected with cutting piece (9).