CN200964988Y

CN200964988Y - Theft-proof nut

Info

Publication number: CN200964988Y
Application number: CN 200620133966
Authority: CN
Inventors: 宋贵彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-30
Filing date: 2006-09-30
Publication date: 2007-10-24
Anticipated expiration: 2016-09-30

Abstract

The utility model relates to a theft-proof nut which is cylinder-shape. One end of the utility model is closed and the other end of the utility model is opened with a blind hole which is provided with an internal screw thread; the closed end of the utility model is opened with a plurality of unidirectional screwing troughs with ring-shape; one end of each unidirectional screwing trough is provided with a force surface which is vertical to the end surface of the closed end; the other end of the unidirectional screwing trough is an end surface which glossily outspreads to the end surface of the closed end; the force surface of a plurality of unidirectional screwing trough has the same direction with the screwing direction of the theft-proof nut. By using the theft-proof nut, the utility model can not be disassembled with normal tools after tightly screwed, which reaches the theft-proof purpose.

Description

Anti-theft nut

Technical field

The utility model relates to a kind of anti-theft nut.

Background technique

The car plate of communal facility such as traffic mark board, motor vehicle, electric power facility etc. are often stolen, cause the public interest sustain damage, are the difficult problems that current society faces.Make anti-theft device as how lower cost, reach anti-theft effect, be worth further investigation.

Summary of the invention

At the deficiencies in the prior art, the purpose of this utility model is: a kind of nut is provided, and the outer rim of nut all is circular, and uses common instrument this nut, bolt can not be turned on, to reach antitheft purpose.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of anti-theft nut, it is characterized in that: it is cylindric, the sealing of one end, the other end axially offers a blind hole, blind hole is provided with internal thread, and ring-type offers at least two unidirectional tightened-up grooves on its closed end, and a wherein end of each unidirectional tightened-up groove is provided with the stress surface vertical with the end face of described closed end, then by the smooth end face that extends to described closed end of transitional surface, the direction of the stress surface of described several unidirectional tightened-up grooves is identical with the direction that anti-theft nut is screwed for the other end.

The threaded end of described anti-theft nut is outward extended with a circle bead.

Described closed end is spherical or the ellipsoid shape.

The threaded end of described anti-theft nut is outward extended with a circle bead, and described closed end is spherical or the ellipsoid shape.

Described unidirectional tightened-up groove connects mutually.

For achieving the above object, the technical solution adopted in the utility model can also be:

A kind of anti-theft nut, it is characterized in that: it is cylindric, the sealing of one end, the other end offers a blind hole, blind hole is provided with internal thread, anti-theft nut is offered a threaded end and is outward extended with a circle bead, ring-type offers at least two unidirectional tightened-up grooves on described bead, a wherein end of each unidirectional tightened-up groove is provided with the stress surface vertical with the bead plane, the other end then is the smooth bead plane that extends to, and the direction of the stress surface of described several unidirectional tightened-up grooves is identical with the direction that anti-theft nut is screwed.

Described closed end is spherical or the ellipsoid shape.

On the end face of described closed end, be provided with a loop bead.

Also form a step on the described nut body.

Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be: to use general tool can't dismantle this anti-theft nut, can reach antitheft effect.

Description of drawings

Fig. 1 is the utility model first embodiment's stereogram;

Fig. 2 is the worm's eye view of Fig. 1;

Fig. 3 is the utility model second embodiment's stereogram;

Fig. 4 is the sectional view of Fig. 3;

Fig. 5 is the utility model the 3rd embodiment's stereogram;

Fig. 6 is the sectional view of Fig. 5;

Fig. 7 is the utility model the 4th embodiment's stereogram;

Fig. 8 is the sectional view of Fig. 7;

Fig. 9 is the utility model the 5th embodiment's stereogram;

Figure 10 is the utility model the 6th embodiment's stereogram;

Figure 11 is the utility model the 7th embodiment's stereogram;

Figure 12 is the sectional view of Figure 11;

Figure 13 is the sectional view after the utility model the 7th embodiment construction;

Figure 14 is the stereogram of another structure of the utility model the 7th embodiment.

10,20,30,40,50,60, the 70-anti-theft nut description of reference numerals:; The 11-blind hole; The 12-internal thread; 13,33,53,63-unidirectional tightened-up groove; The end face of 14-closed end; 131,331,531-stress surface; 132,332,532-transitional surface; 21,31-bead; 311-bead plane; The 44-step; 71-ring-type bead; The 72-laminar body.

Embodiment

As shown in Figure 1 and Figure 2, be first embodiment's stereogram and the worm's eye view of the utility model anti-theft nut, described anti-theft nut 10 is cylindric, the sealing of one end, the other end axially offers a blind hole 11, blind hole 11 is provided with internal thread 12, and ring-type offers several unidirectional tightened-up grooves 13 on its closed end, each unidirectional tightened-up groove 13 1 end is provided with the stress surface 131 vertical with the end face 14 of described closed end, and the other end then is by the transitional surface 132 smooth end faces 14 that extend to described closed end.The direction of the stress surface 131 of described several unidirectional tightened-up grooves 13 is identical with the direction that anti-theft nut 10 is screwed.After pushing described stress surface 131 described anti-theft nut 10 screwed, can't it be unscrewed with general tool, just reached antitheft purpose.

As shown in Figure 3, Figure 4, be the utility model second embodiment's stereogram and sectional view, the anti-theft nut 20 wherein and the difference of the anti-theft nut 10 among first embodiment are: the end that anti-theft nut 20 is provided with tapped hole stretches out and is provided with a circle bead 21.

As Fig. 5, shown in Figure 6, be the utility model the 3rd embodiment's stereogram and sectional view, the anti-theft nut 30 wherein and the difference of the anti-theft nut 20 among second embodiment are: described unidirectional tightened-up groove 33 is located on the bead 31, a wherein end of each unidirectional tightened-up groove 33 is provided with the stress surface 331 vertical with bead plane 311, the other end then is that the direction of the stress surface 331 of described several unidirectional tightened-up grooves 33 is identical with the direction that anti-theft nut 30 is screwed by the transitional surface 332 smooth bead planes 311 that extend to.

As Fig. 7, shown in Figure 8, be the utility model the 4th embodiment's stereogram and sectional view, the anti-theft nut 40 wherein and the difference of the anti-theft nut 30 among the 3rd embodiment are: the nut top is spherical or the ellipsoid shape, and larceny more is difficult to carry out; And on nut body, also form a step 44, to save the structural strength of nut material and strengthened thread section.

As Fig. 9, shown in Figure 10, be the utility model the 5th, the 6th embodiment's stereogram, anti-theft nut the 50, the 60th has wherein been made variation on

anti-theft nut

10 and 40, and difference is: each unidirectional tightened-up groove 53,63 interpenetrates.

As Figure 11～shown in Figure 12, be the utility model the 7th embodiment's stereogram and sectional view, the difference of the anti-theft nut 30 among this anti-theft nut 70 and the 3rd embodiment only is: the end face at the nut closed end is provided with a loop bead 71, when unit in charge of construction need add sign on nut, sign can be recorded on the laminar body 72 with forms such as patterns, then laminar body 72 are snapped in the containing space that ring-type bead 71 forms, force in the ring-type bead again and make its distortion with laminar body 72 urgent location (as shown in figure 13).Described ring-type bead can be molded over the arbitrary position of the end face of closed end, as shown in figure 14.

More than explanation is just illustrative for the utility model, and it is nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited, can make many modifications, variation or equivalence, but but all will fall within the claim restricted portion of the present utility model.

Claims

1, a kind of anti-theft nut, it is characterized in that: it is cylindric, the sealing of one end, the other end axially offers a blind hole, blind hole is provided with internal thread, ring-type offers at least two unidirectional tightened-up grooves on its closed end, a wherein end of each unidirectional tightened-up groove is provided with the stress surface vertical with the end face of described closed end, then by the smooth end face that extends to described closed end of transitional surface, the direction of the stress surface of described several unidirectional tightened-up grooves is identical with the direction that anti-theft nut is screwed for the other end.

2, anti-theft nut according to claim 1 is characterized in that: the threaded end of described anti-theft nut is outward extended with a circle bead.

3, anti-theft nut according to claim 1 is characterized in that: described closed end is spherical or the ellipsoid shape.

4, anti-theft nut according to claim 1 is characterized in that: the threaded end of described anti-theft nut is outward extended with a circle bead, and described closed end is spherical or the ellipsoid shape.

5, anti-theft nut according to claim 1 is characterized in that: described unidirectional tightened-up groove connects mutually.

6, a kind of anti-theft nut, it is characterized in that: it is cylindric, the sealing of one end, the other end offers a blind hole, blind hole is provided with internal thread, anti-theft nut is offered a threaded end and is outward extended with a circle bead, ring-type offers at least two unidirectional tightened-up grooves on described bead, a wherein end of each unidirectional tightened-up groove is provided with the stress surface vertical with the bead plane, the other end then is the smooth bead plane that extends to, and the direction of the stress surface of described several unidirectional tightened-up grooves is identical with the direction that anti-theft nut is screwed.

7, anti-theft nut according to claim 6 is characterized in that: described closed end is spherical or the ellipsoid shape.

8, anti-theft nut according to claim 6 is characterized in that: be provided with a loop bead on the end face of described closed end.

9, anti-theft nut according to claim 6 is characterized in that: also form a step on the described nut body.