CN206026413U

CN206026413U - Pressurization hollow screw without a head

Info

Publication number: CN206026413U
Application number: CN201620701015.5U
Authority: CN
Inventors: 易胜
Original assignee: Hunan Parknshop Biological Engineering Co Ltd
Current assignee: Hunan Parknshop Biological Engineering Co Ltd
Priority date: 2016-07-06
Filing date: 2016-07-06
Publication date: 2017-03-22
Anticipated expiration: 2026-07-06

Abstract

The utility model discloses a pressurization hollow screw without a head, including screw body, screw body includes the nail body and follows closely the body down, go up the nail body and all leave the cavity with the inside of the lower nail body, first draw -in groove and second draw -in groove have been seted up on going up the nail body and following closely a body close terminal surface down respectively, first calorie of post and second card post of fixedly connected with and first draw -in groove and second draw -in groove looks adaptation respectively on the terminal surface that down the nail body is close with the last nail body, and go up the nail body and follow closely down personally experience sth. Part of the body between through first calorie of post, second card post, first draw -in groove and the second draw -in groove fixed connection that cooperatees. This pressurization hollow screw without a head goes up the nail body and down through first calorie of post, second card post, first draw -in groove and the second draw -in groove fixed connection that matches between the nail body, can dismantle, convenient to use, and stability is good, and the security is high.

Description

A kind of compressive hollow screw without a head

Technical field

This utility model is related to screw technique field, specially a kind of compressive hollow screw without a head.

Background technology

Ankle joint Type B and c-type fracture are often related to ankle after ankle joint, it is considered that the involved articular surface of back ankle fracture exceedes When 25%, the rear ankle involved to fracture is needed to carry out surgical menopause.Conventional method is to be fixed with lag screw from the front to the back, It is required that screw thread will pressurize across fracture line.Due to reach reason, often produce and be difficult to pressurization fixation to back ankle fracture.Nothing Head forcing screw employs the design of special variable pitch screw, to the pressurization of back ankle fracture block because not limited by reach, but Be general head-free pressurizing screw be all it is integrally formed, it is non-dismountable, cause using inconvenience.

The content of the invention

The purpose of this utility model is to provide a kind of compressive hollow screw without a head, to solve to propose in above-mentioned background technology Problem.

For achieving the above object, this utility model provides following technical scheme：A kind of compressive hollow screw without a head, including spiral shell Nail body, the screw body includes that cavity is left in the inside of rivet nut and lower rivet nut, the upper rivet nut and lower rivet nut, described The first draw-in groove and the second draw-in groove, the lower rivet nut and upper rivet nut is offered respectively on a upper rivet nut end face close with lower rivet nut The first card column and the second card column being adapted with the first draw-in groove and the second draw-in groove is respectively fixedly connected with a close end face, And be engaged and be fixedly connected by the first card column, the second card column, the first draw-in groove and the second draw-in groove between upper rivet nut and lower rivet nut.

Preferably, the rounded shape of the cavity cross section of the upper rivet nut and lower rivet nut.

Preferably, to be provided with the triangle being spaced substantially equidistant spacing for the close one side of first card column and the second card column The triangle spacing breach corresponding with the spacing salient point of triangle is left on salient point, and first draw-in groove and the second draw-in groove.

Preferably, the outer surface of the upper rivet nut and lower rivet nut is provided with screw thread.

Preferably, the rectangular shape in the section of first draw-in groove and the second draw-in groove.

Compared with prior art, this utility model has the advantages that：The compressive hollow screw without a head, upper rivet nut with It is engaged and is fixedly connected by the first card column, the second card column, the first draw-in groove and the second draw-in groove between lower rivet nut, detachably, uses It is convenient, additionally, the close one side of the first card column and the second card column is provided with the spacing salient point of the triangle being spaced substantially equidistant, and the The triangle spacing breach corresponding with the spacing salient point of triangle is left on one draw-in groove and the second draw-in groove, and good stability is safe.

Description of the drawings

Fig. 1 is this utility model structural representation；

Fig. 2 is this utility model Structure explosion diagram；

Fig. 3 is this utility model A-A enlarged drawings；

Fig. 4 is rivet nut sectional view on this utility model.

In figure：1 screw body, rivet nut, 102 times rivet nuts, 103 first draw-in grooves, 104 second draw-in grooves, 105 first cards on 101 Post, 106 second card columns, 107 spacing salient points, 108 triangle spacing breach, 2 cavitys, 3 screw threads.

Specific embodiment

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only this utility model a part of embodiment, rather than whole Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment for being obtained, belongs to the scope of this utility model protection.

Fig. 1-4 are referred to, this utility model provides a kind of technical scheme：A kind of compressive hollow screw without a head, including screw Body 1, screw body 1 include that the outer surface of rivet nut 101 and lower rivet nut 102, upper rivet nut 101 and lower rivet nut 102 is provided with 2 section of cavity that cavity 2, upper rivet nut 101 and lower rivet nut 102 are left in the inside of screw thread 3, upper rivet nut 101 and lower rivet nut 102 is equal Rounded shape, offers the first draw-in groove 103 and the second draw-in groove on the end face close with lower rivet nut 102 of upper rivet nut 101 respectively 104, the rectangular shape in the section of the first draw-in groove 103 and the second draw-in groove 104, lower rivet nut 102 end close with upper rivet nut 101 The first card column 105 and the second card column 106 being adapted with the first draw-in groove 103 and the second draw-in groove 104 is respectively fixedly connected with face, The close one side of first card column 105 and the second card column 106 is provided with the spacing salient point 107 of the triangle being spaced substantially equidistant, and The triangle spacing breach 108 corresponding with the spacing salient point 107 of triangle, stability is left on one draw-in groove 103 and the second draw-in groove 104 It is good, it is safe, and between upper rivet nut 101 and lower rivet nut 102, pass through the first card column 105, the second card column 106, the first draw-in groove 103 It is engaged with the second draw-in groove 104 and is fixedly connected, it is detachably, easy to use.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, Be appreciated that these embodiments can be carried out various changes in the case of without departing from principle of the present utility model and spirit, repair Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.

Claims

1. a kind of compressive hollow screw without a head, including screw body（1）, it is characterised in that：The screw body（1）Including upper nail Body（101）With lower rivet nut（102）, the upper rivet nut（101）With lower rivet nut（102）Inside leave cavity（2）, the upper nail Body（101）With lower rivet nut（102）The first draw-in groove is offered respectively on a close end face（103）With the second draw-in groove（104）, institute State lower rivet nut（102）With upper rivet nut（101）It has been respectively fixedly connected with and the first draw-in groove on a close end face（103）With second Draw-in groove（104）The first card column being adapted（105）With the second card column（106）, and upper rivet nut（101）With lower rivet nut（102）Between By the first card column（105）, the second card column（106）, the first draw-in groove（103）With the second draw-in groove（104）It is engaged and is fixedly connected.

2. a kind of compressive hollow screw without a head according to claim 1, it is characterised in that：The upper rivet nut（101）With under Rivet nut（102）Cavity（2）The rounded shape in section.

3. a kind of compressive hollow screw without a head according to claim 1, it is characterised in that：First card column（105）With Second card column（106）Close one side is provided with the spacing salient point of the triangle being spaced substantially equidistant（107）, and first draw-in groove （103）With the second draw-in groove（104）On leave and the spacing salient point of triangle（107）Corresponding triangle spacing breach（108）.

4. a kind of compressive hollow screw without a head according to claim 1, it is characterised in that：The upper rivet nut（101）With under Rivet nut（102）Outer surface be provided with screw thread（3）.

5. a kind of compressive hollow screw without a head according to claim 1, it is characterised in that：First draw-in groove（103）With Second draw-in groove（104）The rectangular shape in section.