CN2890462Y - Improved structure of anti-theft screw nut - Google Patents

Abstract

The utility model discloses an anti-theft screw nut with reasonable structure, simple installation and reliable locking, which comprises a screw nut main body and a steel ball, wherein the inner wall of the screw nut main body is provided with a horizontal semi-wedge shaped groove; the horizontal semi-wedge shaped groove is from shallow to deep along the screwing-in direction of the screw bolt; one deeper side of the horizontal semi-wedge shaped groove is prearranged with a spring and the shallower side is arranged movably with the steel ball. As a ring-shaped groove is removed form the screw nut main body, the screw nut cost is decreased and the procedure of embedding anti-loose ring in the ring-shaped groove is also eliminated at the time of installation. Due to the actions of the spring, the steel ball is always pressed against on the end of the shallower horizontal semi-wedge shaped groove, so as to ensure the steel ball collaborates with the screw bolt all the time and improve the anti-theft function.

Description

The structure-improved of anti-theft nut

Technical field:

The utility model relates to construction and uses technical field of fastening, refers in particular to a kind of structure-improved of anti-theft nut.

Background technique:

The common structure of the anti-theft nut that engineering is used in the prior art is for including nut body, the retaining pin, the retaining pin is located in the wedge type groove of inwall of nut body, on the bolt back-out end inner hole wall of nut body, be provided with the ring-like deep trouth of a circle, be embedded the anti-DNA releaxed circular DNA of a nylon that cooperates with the wedge type groove in this annular deep trouth, the anti-DNA releaxed circular DNA of this nylon can prevent that pin from dropping out and cause nut anti-loose with cooperating of bolt, though this kind structure has played anti-loosing effect effectively, but this kind structure of anti-DNA releaxed circular DNA of nylon and nut, in practice of construction, installation steps are more, and the retaining pin produces displacement easily after the nut check toward wedge type groove depth place, thereby make nut loosening, lose the locking anti-theft feature.

Summary of the invention:

The purpose of this utility model is to overcome the deficiencies in the prior art part, provide a kind of rational in infrastructure, anti-theft nut simple, reliable lock is installed.

For achieving the above object, the technological scheme that the utility model provides is: include nut body, steel ball, it is characterized in that: the inwall in nut body is provided with at least one horizontal half wedge type slot, this horizontal half wedge type slot is even along the bolt screw-in direction from shallow to deep, and the darker side of each horizontal half wedge type slot is preset spring, and steel ball is placed in a more shallow side activity.

After the utility model adopts technique scheme, can save the ring-like deep trouth of nut body, reduce the nut cost, also saved the step that in annular deep trouth, embeds locking ring during installation, and because the effect of spring, thrust piece is pushed up all the time to the more shallow end of half wedge type slot, thereby guarantee steel ball and bolt mating reaction all the time, improve anti-theft feature.

Description of drawings:

Accompanying drawing 1 vertically partly cuts open structural representation for the nut of the utility model preferred embodiment;

Accompanying drawing 2 laterally partly cuts open structural representation for the nut of the utility model preferred embodiment;

Accompanying drawing 3 is the steel ball structural representation of the utility model preferred embodiment;

Accompanying drawing 4 partly cuts open schematic representation for vertical assembly structure of putting the steel ball back nut into of the utility model preferred embodiment;

Accompanying drawing 5 is the transverse sectional view behind the precession bolt of the utility model preferred embodiment;

Accompanying drawing 6 is the spring structure schematic representation of the utility model preferred embodiment.

Embodiment:

One preferred embodiment is described further the utility model to the utility model below in conjunction with accompanying drawing, sees shown in accompanying drawing 1～accompanying drawing 6:

Present embodiment includes nut body 1, steel ball 2, on the inwall of nut body 1, have two horizontal half wedge type slots 3 (can increase as required or reduce) symmetrically, laterally half wedge type slot 3 along the bolt screw-in direction from shallow to deep, the default spring 4 of a darker side in each horizontal half wedge type slot 3, a steel ball 2 is placed in a more shallow side activity, like this, because spring 4 pushes up a side more shallow in wedge type groove 3 to steel ball 2 always, to guarantee steel ball 2 and bolt mating reaction all the time, prevent that effectively steel ball 2 from producing displacement to half wedge type slot 3 darker sides, make nut 1 generation of locking loosening, lose the locking anti-theft feature.

The embodiment of the above is preferred embodiment of the present utility model only, is not to limit practical range of the present utility model with this, so the equivalence that all shapes according to the utility model, structure and principle are done changes, all should be covered by in the protection domain of the present utility model.

Claims (1)

1, the structure-improved of anti-theft nut, include nut body (1), steel ball (2), it is characterized in that: the inwall in nut body (1) is provided with at least one horizontal half wedge type slot (3), this horizontal half wedge type slot (3) is even along the bolt screw-in direction from shallow to deep, and the darker side of each horizontal half wedge type slot (3) is preset spring (4), and steel ball (2) is placed in a more shallow side activity.

Images