CN201496366U

CN201496366U - Retaining bolt

Info

Publication number: CN201496366U
Application number: CN2009201930820U
Authority: CN
Inventors: 沈世民
Original assignee: Jiaxing Bazi Standard Part Co Ltd
Current assignee: Jiaxing Bazi Standard Part Co Ltd
Priority date: 2009-09-03
Filing date: 2009-09-03
Publication date: 2010-06-02
Anticipated expiration: 2019-09-03

Abstract

A retaining bolt includes a bolt shank and a bolt head, wherein the bolt head includes a bottom surface and a spherical surface connected with the bottom surface; and the spherical surface comprises more than two continuous curved faces, the edge of one side of one of the curved faces is overlapped with the other curved face of the adjacent one, and a clamp groove is formed at the overlapping part of the curved faces. Due to the structure that the spherical surface is directly combined with the bottom surface, the ordinary spanner can not hold the bolt and unscrew the bolt. By overlapping more than two continuous curved surfaces and arranging a single-direction clamp groove structure at the overlapping part, the bolt can not be unscrewed by the same tools after being screwed tightly.

Description

The retaining bolt

Technical field

The utility model relates to a kind of bolt, relates in particular to a kind of retaining bolt.

Background technique

Bolt, nut are one group of flexible connection links commonly used.Bolt comprises that bolt head and bolt shank lead to, and its bolt head is outer regular hexagon or interior regular hexagon structure often.The bolt of this structure can use various Wrenchs to screw flexibly, but this also causes some establishments that connect in this way or equipment to be stolen, especially power equipment.In power industry, still there is not a kind of bolt can solve anti-pilferage problem at present.

Summary of the invention

The purpose of this utility model provides a kind of retaining bolt, offers the groove of some single directions on bolt, can not disassemble by common wrench after making bolt screw to tighten.

The technical solution of the utility model is:

A kind of retaining bolt comprises bolt shank and bolt head, and bolt head comprises bottom surface and the sphere that is connected with the bottom surface, and described sphere is made up of two above continuous curve surfaces, and a side margin of curved surface is overlapped in another curved surface that is adjacent, and the curved surface overlapping is provided with draw-in groove.Bolt shank is provided with screw thread.

When curved surface and curved surface are overlapping, can be by clockwise or counterclockwise folded mutually successively, thus the clockwise or anticlockwise draw-in groove of corresponding formation.

Described sphere is the ball face of 1/2-1/100, preferentially selects hemisphere face.This sphere is generally formed sphere by 2-10 continuous curve surface.Preferably, form described sphere by 5 continuous curve surfaces.

In order more effectively to make the bolt retaining, described bottom surface is provided with clockwise or counterclockwise protruding stupefied more than 2, i.e. slideproof tooth.

By the draw-in groove of single direction (clockwise or counterclockwise) is set on the bolt sphere, make screw on the bolt tight after, can't turn on by identical instrument.Use sphere and the direct structure combining in bottom surface, also make common wrench hold bolt and turn on.

The beneficial effects of the utility model are:

Retaining bolt described in the utility model uses sphere and the direct structure combining in bottom surface, makes common wrench hold bolt and turns on.

Overlapping and the structure of single direction draw-in groove is set by because more than two continuous curved surfaces at overlapping, make screw on the bolt tight after, can't turn on by identical instrument.This structure applications can prevent effectively that equipment is stolen in power industry.

Description of drawings

Fig. 1 is the utility model retaining bolt one embodiment's a structural representation plan view;

Fig. 2 is the utility model retaining bolt one embodiment's a structural representation left view.

Embodiment

Further specify structure characteristic of the present utility model below in conjunction with accompanying drawing.

As depicted in figs. 1 and 2, the utility model retaining bolt comprises bolt head 1 and bolt shank 2.Bolt head 1 comprises bottom surface 11 and the sphere 12 that is connected with the bottom surface.Bolt shank 2 is provided with screw thread 21.

Sphere 12 is by first surface 121, second curved surface 122, the 3rd curved surface 123, the 4th curved surface 124 and the 5th curved surface 125, totally five continuous curve surfaces are formed, one side margin 1211 of first surface 121 is overlapped in second curved surface 122 that is adjacent, and its overlapping is provided with draw-in groove 3; Second curved surface, 122 1 side margin 1221 are overlapped in the 3rd curved surface 123 that is adjacent, and its overlapping is provided with draw-in groove 3; The 3rd curved surface 123 1 side margin 1231 are overlapped in the 4th curved surface 124 that is adjacent, and its overlapping is provided with draw-in groove 3; Similarly, the 4th curved surface 124 1 side margin are overlapped in the 5th curved surface 125 that is adjacent, and its overlapping is provided with draw-in groove 3; The 5th curved surface 25 1 side margin are overlapped in the first surface 121 that is adjacent again, and its overlapping is provided with draw-in groove.Draw-in groove 3 to offer direction consistent, clockwise or counterclockwise.

Bottom surface 11 is provided with more than 2 clockwise protruding stupefied 4, and promptly slideproof tooth makes the bolt bottom surface more firm with combining of object surface, make screw on the bolt tight after, can't turn on by identical instrument.

Claims

1. retaining bolt, comprise bolt shank and bolt head, it is characterized in that: described bolt head comprises bottom surface and the sphere that is connected with the bottom surface, and described sphere is made up of two above continuous curve surfaces, one side margin of curved surface is overlapped in another curved surface that is adjacent, and the curved surface overlapping is provided with draw-in groove.

2. retaining bolt according to claim 1 is characterized in that: described sphere is the ball face of 1/2-1/100.

3. retaining bolt according to claim 1 is characterized in that: curved surface and curved surface are overlapping in the direction of the clock.

4. retaining bolt according to claim 1 is characterized in that: curved surface and curved surface are by counterclockwise overlapping.

5. retaining bolt according to claim 1 is characterized in that: described sphere is made up of 2-10 continuous curve surface.

6. retaining bolt according to claim 1 is characterized in that: described sphere is made up of 5 continuous curve surfaces.

7. retaining bolt according to claim 1 is characterized in that: described bottom surface is provided with clockwise or protruding stupefied more than 2 counterclockwise.