CN202100588U

CN202100588U - Assembled screw

Info

Publication number: CN202100588U
Application number: CN2011201963412U
Authority: CN
Inventors: 张江涛; 周家乐
Original assignee: SHANGHAI SENXIA FASTENER INTERNATIONAL TRADE CO Ltd
Current assignee: SHANGHAI SENXIA FASTENER INTERNATIONAL TRADE CO Ltd
Priority date: 2011-06-13
Filing date: 2011-06-13
Publication date: 2012-01-04
Anticipated expiration: 2021-06-13

Abstract

The utility model discloses an assembled screw, comprising a screw. An elastic pad and a flat pad are sequentially arranged on a screw rod between the head and the screw thread section of the screw, and the diameter of the screw rod is smaller than that of a screw hole which corresponds to the screw. When the assembled screw is used, the screw rod between the head and the screw thread section of the screw also can be screwed into the screw hole, so that the combination among the screw, an assembly surface and the screw hole is tighter without a gap, so that the looseness of the screw caused by multi-vibration can be avoided.

Description

A kind of SEM screw SEM Scr

Technical field

The utility model relates to a kind of screw, more particularly, is a kind of SEM screw SEM Scr.

Background technique

Screw is to utilize the circular rotation in inclined-plane of object and the physics and the mathematical principle of frictional force, the instrument of fastening by easy stages implements parts.Screw is an industrial necessity indispensable in the daily life: like the minimum screw of uses such as photographic camera, glasses, clock and watch, electronics; The general screw of TV, electric product, musical instrument, furniture etc.; Then use large-scale screw, nut as for engineering, building, bridge, traffic utensil, aircraft, electric car, automobile etc. then are big primary screw and use.Screw is born vital task in industry, as long as exist industry on the earth, then the function of screw is important forever.Screw is the common invention in people's productive life over the past thousands of years, and according to application, it is human first invention.

Yet existing screw is in use because the bar of the head of screw and the screw rod between thread section directly greater than screw, so screw rod is to twist in the screw of not entering in thread, causes screw, not close-fitting gapped with the assembling surface of contact.Through rocking repeatedly, the axial and radial junction credit union of screw is loosening, and this fixedly is a fatal potential hazard for some key positions.

Summary of the invention

Because the problems referred to above that existing technology exists, the utility model proposes a kind of SEM screw SEM Scr,

It can address the above problem effectively.

To achieve these goals, the utility model has adopted following technological scheme:

The utility model proposes a kind of SEM screw SEM Scr, comprises a screw, on the head of screw and the screw rod between thread section, is provided with a bullet pad and a plain cushion successively, and the bar of screw rod footpath is less than the diameter of the corresponding screw of this screw.

As the further characteristic of the utility model, the bullet pad is an inc annulus.

As the further characteristic of the utility model, the diameter of plain cushion is not less than the diameter of bullet pad.

Owing to adopt above technological scheme; The SEM screw SEM Scr of the utility model can also be screwed into the head and the screw rod between thread section of screw in the screw in use; Make screw and screw combine more fastening; Do not have the space with the mating face close-fitting, and can prevent that vibrations repeatedly from causing the loosening phenomenon of screw.

Description of drawings

Fig. 1 is an embodiment's of the utility model a schematic representation.

Among the figure: 1, the head of screw; 2, thread section; 3, screw rod; 4, the bullet pad; 5, plain cushion.

Embodiment

According to accompanying drawing and specific embodiment the utility model is described further below:

As shown in Figure 1, a kind of SEM screw SEM Scr comprises a screw, on the screw rod 3 of 2 of the head 1 of screw and thread sections, be provided with movable a bullet pad 4 and a plain cushion 5 successively, and the bar of screw rod 3 footpath is less than the diameter of the screw of this screw correspondence.

Existing screw all is apertures greater than screw, the bar footpath of screw rod 3, and in thread, screw rod 3 parts are can not get in the screw, through after repeatedly must rocking vibration, and axially the becoming flexible of screw with radial junction credit union.And the biggest characteristic of the SEM screw SEM Scr of the utility model just is to have improved this point, makes the aperture of the bar footpath of screw rod 3 less than screw, when twisting, can make screw and screw combine closely so that screw rod 3 also gets in the screw, has prevented loosening phenomenon.

Among the figure, bullet pad 4 is processed by the elastic material of an inc ring, and when screw was slightly loosening, this bullet pad 4 can prop up plain cushion 5, makes screw and mating face close-fitting still can not to have combining of gap.

The diameter of plain cushion 5 is greater than the diameter of this bullet pad 4, can prevent that bullet pad 4 is absorbed in when tightening the screw to depart from screw when mating face causes screw to be twisted.

But above-mentioned embodiment is exemplary, is to be the restriction that this patent is comprised scope in order better to make those skilled in the art can understand this patent, can not to be interpreted as; So long as according to spirit that this patent discloses done anyly be equal to change or modify, all fall into the scope that this patent comprises.

Claims

1. SEM screw SEM Scr is characterized in that: comprise a screw, on the head of said screw and the screw rod between thread section, be provided with a bullet pad and a plain cushion successively, and the bar of said screw rod footpath is less than the diameter of the corresponding screw of this screw.

2. SEM screw SEM Scr according to claim 1 is characterized in that: said bullet pad is an inc annulus.

3. SEM screw SEM Scr according to claim 1 and 2 is characterized in that: the diameter of said plain cushion is not less than the diameter of said bullet pad.