CN2521430Y

CN2521430Y - Screw-thread improved structure of screw

Info

Publication number: CN2521430Y
Application number: CN 01275317
Authority: CN
Inventors: 陈秀美
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-28
Filing date: 2001-11-28
Publication date: 2002-11-20
Anticipated expiration: 2011-11-28

Abstract

The utility model is thread tooth modified structure for thread, essentially consists of a screw head, a screw body, and a plurality of inclined thread teeth densely distributed on the screw body, wherein one of the screw teeth, a certain distance away from the screw head, is designed in an arc wavy shape. When the screw is locked, the wavy shaped screw tooth enables the screw to be firmer in the prevention of loosening and deciduous after the locking of the screw.

Description

A kind of thread structure-improved of screw

Technical field

The utility model relates to mechanical, and particularly a kind of thread structure-improved of screw refers to the wavy thread of a kind of tool arc especially, makes screw more fastening and thread structure of being difficult for getting loose after sealed.

Background technique

General for sealed screw, normally by screw terminal, screw body and the most thread that is distributed in the screw body constitute, when screw when sealed, by the screw-in of thread to closure, screw is fixed, and the screw that this kind is common is because its thread is all smooth shape, therefore, when screw after sealed, be easy to generate phenomenon loosening or that come off through vibrations, sealed effect is had a greatly reduced quality, severe patient influences the Security of closure, very undesirable, this kind shortcoming is perplexing the user for a long time always, therefore suddenly waits to improve.

Particular content

The purpose of this utility model is exactly the shortcoming that exists at above-mentioned general common screw, a kind of thread structure-improved of screw is provided, its structure mainly is therein apart from the thread of screw terminal one determining deviation, be made as the wavy of arc, screw is held closure by this wavy thread when sealed, and close and firm more takes place with the phenomenon that prevents to become flexible, come off.

Description of drawings

Fig. 1 is a schematic perspective view of the present utility model.

Fig. 2 is a floor map of the present utility model.

Fig. 3 is embodiment's schematic representation of the present utility model.

1 is that screw, 11 is that screw terminal, 12 is that screw body, 13 is that oblique shape thread, 14 is that wavy thread, 2 is that closure, 21 is to cut to stitch.

Embodiment

As shown in Figure 1, the utility model comprises a screw terminal 11, one screw body 12 and the most twill threads 13 that are clouded in these screw body 12 surfaces, wherein, this is apart from a wherein thread of screw terminal 11 1 determining deviations, be to make it along plane around screw body 12, be made as wavy that arc rises and falls, to constitute a wavy thread 14, when making screw 1 sealed, be able to because of this wavy thread 14 is more firm, prevent that sealed back is because of cause loosening of vibrations or come off.

As shown in Figure 2, wavy thread 14 of the present utility model is to be located at apart from screw terminal 11 certain spacing places, according to actual test, the interval a of this wavy thread 14 and screw terminal 11 is for by screw terminal 11 downward about the 7th thread positions, makes it sealedly have more fastening effect.

As shown in Figure 3, be embodiment's schematic representation of the present utility model, screw 1 when sealed, except original thread 13 along closure 2 incision screws, after whole screw 1 sealed finishing, because the arc that this wavy thread 14 goes to upper and lower rises and falls, the thread cutting seam 21 that it just can be held in closure 2 respectively makes screw 1 constitute compaction, relative makes screw 1 more firm, so, screw 1 will be avoided because of collision or shake to produce becoming flexible, even come off.

Claims

1, a kind of thread structure-improved of screw, mainly comprise screw terminal, screw body and be clouded in most tiltedly shape threads of screw body, it is characterized in that: gather at the thread of screw body, it is a wherein thread at distance screw terminal one determining deviation, be made as wavy that arc rises and falls, to constitute a wavy thread.