CN201031847Y

CN201031847Y - Collapsible locking type screw nail

Info

Publication number: CN201031847Y
Application number: CNU2007200216919U
Authority: CN
Inventors: 李涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-11
Filing date: 2007-05-11
Publication date: 2008-03-05
Anticipated expiration: 2017-05-11

Abstract

The utility model discloses a detachable locked screw driver consisting of a screw and a tail pin; the utility model is characterized in that the upper end of the screw which is equipped with external screw threads is equipped with the tail pin and an internal hole of the screw which is equipped with internal screw threads is arranged on the middle part between the upper part of the screw and the tail pin; the tail pin is equipped with tail pin external threads which are matched with the internal threads of the screw and the upper end of the tail pin is equipped with a tail pin cap which is equipped with cap external threads. The utility model is stable and reliable and has excellent shake-proof function.

Description

Detachable locking formula screw

1, technical field

The utility model relates to a kind of be used to connect the also screw of fastening various devices, especially a kind of detachable locking formula screw.

2, background technique

At present, making in the society and use in screw many kinds are arranged, but be broadly divided into two classes.One class is the normal screws nail, be at screwed screw rod with regard to its structure and be provided with the difform nut that is used for fastening location in screw tip and form, the screw of this structure is to be connected in the fastening piece and by nut by being threaded on the screw rod another is connected fastening piece location fastening with it together, thus the task that realization links together two kinds of devices.Though the screw of this structure can be realized task that two kinds of devices are linked together.But because the screw of this kind structure is single by the screw thread on the screw and by being connected with screw-thread fit on the connected piece, to be under the oscillation frequency condition with higher (as medical Orthopeadic Surgery near end of thighbone dissection bone plate dynamic coxa screw) this screw at connected piece just easily loosening and produce adverse consequences so have on the connected piece of specific function promptly at some, and this is the unsurmountable defective that such screw exists.Another kind of is the lock screw nail, and its structure is to increase screw thread on nut, and two screw threads will be gone up fixation and be locked in down on the fixture, thereby have characteristics solid and reliable, that the anti-vibration performance is strong.But its shortcoming is: such screw can not closely attach fixation and following fixture because have two screw threads.

3, summary of the invention

Task of the present utility model is to provide a kind of detachable locking formula screw that can freely change between lock screw nail and normal screws nail.

For realizing that the technological scheme that this task is taked is: the utility model is made up of screw and tail nail two-part, it is characterized in that described screw is to be provided with the nail tail in the upper end that is provided with externally threaded nail body, be provided with the nail body endoporus that has internal thread in top to the intermediate portion of following closely tail of nail body; Described tail nail is that tail ailing body is provided with the tail nail outside thread that matches with internal thread on the screw endoporus, is provided with in the upper end of tail ailing body to have the externally threaded tail head of a nail.

Owing to taked such scheme, the utility model can use screw to use also and screw and tail nail can be used in combination as the normal screws nail separately, when independent use screw, this moment is identical with the function of general screw, when screw and tail nail is used in combination, be fixed on it under fixation screw on by the outside thread on the screw ailing body this moment, then tail is followed closely in the DRIVE SCREWS nail endoporus, simultaneously by the outside thread on the tail head of a nail be arranged on screw-internal thread fit on the fixation in advance and will go up fixation and be locked in down on the fixture, thereby realize will about the fixation task of locking together.

The beneficial effects of the utility model one are the functions with general screw; The 2nd, owing to adopted the fastening technological scheme of screw-thread fit that two fixations are nailed on screw and tail respectively, so the characteristics that fixation has is solid and reliable, the anti-vibration performance is strong.

4, description of drawings

Accompanying drawing 1 has provided structural representation of the present utility model;

Accompanying drawing 2 has provided the structural representation of the screw in the accompanying drawing 1;

Accompanying drawing 3 has provided the structural representation of the tail nail in the accompanying drawing 1.

In the accompanying drawings 1 for tail nail, 2 be screw, 3 for screw ailing body, 4 for outside thread, 5 for screw ailing body endoporus, 6 for screw ailing tail, 7 for the screw internal thread, 8 for tail ailing cap, 9 for head of a nail outside thread, 10 for tail ailing extracorporeal thread, 11 be tail ailing body.

5, embodiment

With reference to the accompanying drawings, upper end at the screw ailing body 3 that is provided with screw ailing extracorporeal thread 4 is provided with screw ailing tail 6, intermediate portion on the top of screw ailing body 3 to screw ailing tail 6 is provided with the screw ailing body endoporus 5 that has screw internal thread 7, tail ailing body 11 is provided with the tail nail outside thread 10 that matches with screw internal thread 7, is provided with the tail ailing cap 8 that has head of a nail outside thread 9 in the upper end of tail ailing body 11.

Claims

1. detachable locking formula screw, it is characterized in that being provided with screw ailing tail in the upper end of the screw ailing body that is provided with screw ailing extracorporeal thread, intermediate portion on the top of screw ailing body to screw ailing tail is provided with the screw ailing body endoporus that has the screw internal thread, tail ailing body is provided with the tail nail outside thread that matches with the screw internal thread, is provided with in the upper end of tail ailing body to have the externally threaded tail ailing of head of a nail cap.