CN2290722Y

CN2290722Y - Anti-theft nut with improved structure

Info

Publication number: CN2290722Y
Application number: CN 97202048
Authority: CN
Inventors: 赖传荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-14
Filing date: 1997-03-14
Publication date: 1998-09-09
Anticipated expiration: 2007-03-14

Abstract

The utility model relates to an anti-theft nut with an improved structure, which comprises a nut body and a rotary sleeve block, wherein, one end of the nut body is provided with a screw hole for connecting a screw bolt in screw connection, the other end of the nut body is provided with a circular groove with a proper deep, a proper position of the circular groove is provided with a plurality of arc grooves, the whole body of the circular groove can be formed as a quincunx-shaped slot, the arc grooves can be installed according to different angles, and different shapes of quincunx-shaped slots can be displayed. When the nut body is buckled on the screw bolt in screw connection, the screw nut body can not be dismounted by tools. When tools, such as circular tubes, etc. can be used, the tools can not be inserted into the slot, and consequently, anti-theft effect can be improved.

Description

Structurally improved anti-theft screw cap

The utility model relates to a kind of fastening piece, refers to a kind of structurally improved anti-theft screw cap that improves anti-theft effect especially.

Traditional nut A needs by instrument B and with its turn, therefore, its appearance profile all is designed to standardized positive hexagonal column, to reach unified, general and make things convenient for the purpose of turn, yet, though above-mentioned nut A has the lock of revolving bolt, and then the effect of mounting article, but also can be by standardized instrument B (as monkey spanner because of it, box spanner) can revolve easily and open nut A and take off object, cause the stolen thing of object to happen occasionally, for example, as long as the nut A of locking automobile tire it can be revolved by a wrench B opens (as shown in Figure 1), and then can unload tire easily, steel ring.

For solving the existing above-mentioned shortcoming of conventional screw cap A, this creator develops a kind of as Fig. 2 in early days, anti-theft screw cap shown in 3, and this kind anti-theft screw cap mainly is to be made of a nut body C and turn cover piece D, wherein nut body C is a circular cylinder, be set as can be for the screw C1 of screw threaded and attack in the one end, the other end then is designed to one and slightly is quincuncial groove C2, central authorities in this groove C2 are provided with a projection C3 again, in addition, the end of above-mentioned turn cover piece D is to be designed to match with groove C2 and slightly be quincuncial projection D1, the other end then is designed to can be for the hexagon posts D2 of instrument B engaging turn, and by the cooperation of above-mentioned member, the projection D1 that turn can be overlapped piece D plugs together in the groove C2 of nut body C, utilize standardized instrument B to be sticked on the hexagon posts D2 again, make after its turn nut body C is screwed together on the bolt, turn being overlapped piece D takes off again, and it can't be dismantled nut body C with instrument B, yet, though this kind anti-theft screw cap has the effect that can't dismantle with standardized tool, but because above-mentioned projection D1 and groove C2 are quite accurate matching relationship, and both must keep a special angle could in conjunction with, so when projection D1 desires to plug together in groove C2, can make and plug together suitable difficulty and inconvenience, again, as shown in Figure 4, above-mentioned nut body C slightly is quincuncial groove C2, the external diameter of its minimum diameter and projection C3 leaves a metric space, the purpose that keeps this metric space is for making projection D1 plug together the back during turn, projection D1 can have enough hardness to collapse avoiding, but this metric space also can be by the pipe E of a suitable diameter, can insert in the groove C2 nut body C turn through easy processing (as bolt-lock one stove bolt or fix a clipping block) again, so make the burglar can hold easy instrument, steal article easily, and reduce its antitheft effect greatly by fixed by nut.

The purpose of this utility model is to improve the above-mentioned shortcoming of prior art, and a kind of structurally improved anti-theft screw cap that improves anti-theft effect is provided.

For achieving the above object, the utility model is taked following technological scheme:

A kind of structurally improved anti-theft screw cap, comprise a nut body and turn cover piece, wherein: the nut body is a circular cylinder, its improvements are, described nut body one end is attacked and is set as the screw that can supply screw threaded, the other end is provided with the circular groove of an appropriate depth, and be provided with some arc grooves in the appropriate location of this circular groove, slightly be quincuncial slotted eye and make the overall concave groove form one, this arc groove can be provided with angle according to difference, and presents difform quincunx slotted eye, and the middle position in its circular groove is provided with a projection again, make corresponding each the arc groove part of this projection, be equipped with a projection; One end of described turn cover piece is set as can be for the hexagon posts of standardized tool engaging turn, the other end is set as the sleeve part of a circle, this sleeve part just can be sleeved on the outer rim of nut body, again in the inboard bottom of sleeve part, the quincunx slotted eye part of corresponding nut body, be provided with one with the identical shaped rotating block of quincunx slotted eye.

By the cooperation of above-mentioned member, the nut body can be screwed together on the bolt, and can't the recruitment tool be dismantled by the nut body, if the utensil of use pipe etc. also can't plug together in slotted eye, and then improve its antitheft effect greatly.

The utility model embodiment is described with reference to the accompanying drawings as follows:

Fig. 1 screws togather schematic representation for conventional screw cap.

Fig. 2 is a schematic perspective view of commonly using anti-theft screw cap.

Fig. 3 is a sectional drawing of commonly using anti-theft screw cap.

Fig. 4 is for commonly using anti-theft screw cap anti-theft effect schematic representation.

Fig. 5 is the utility model embodiment's a schematic perspective view.

Fig. 6 is the utility model embodiment's a sectional drawing.

Fig. 7 is the utility model embodiment's an anti-theft effect schematic representation.

As shown in Figure 5, the utility model embodiment is made of a nut body 1 and turn cover piece 2, wherein:

Nut body 1 is a circular cylinder, the one end is attacked and is set as the screw 11 that can supply bolt 3 to screw togather, the other end then is provided with the circular groove 12 of an appropriate depth, and be provided with some arc grooves 13 in the appropriate location of this circular groove 12, (this arc groove 13 can be provided with angle by difference and make overall concave groove formation one slightly be quincuncial slotted eye, and present difform quincunx slotted eye), middle position in its circular groove 12 is provided with a projection 14 again, and make this projection 14 corresponding each arc groove 13 parts, be equipped with a projection 15, and make the apical margin of projection 15 tangent with the circumference of circular groove 12 at least.

Above-mentioned turn cover piece 2, be to be provided with the hexagon posts 21 that can engage turn for standardized tool at the one end, the other end then is provided with the sleeve part 22 of a circle, this sleeve part 22 just can be sleeved on the outer rim of nut body 1, again in the inboard bottom of sleeve part 22, corresponding nut body 1 quincunx slotted eye part, be provided with one with the identical shaped rotating block 23 of quincunx slotted eye.

Cooperation by above-mentioned member, the sleeve part 22 that turn can be overlapped piece 2 is sleeved on the outer rim of nut body 1, and light the pressure rotated, make rotating block 23 by the guiding of sleeve part 22 and plug together smoothly in the quincunx slotted eye of nut body 1, relend by standardized instrument and be sticked in hexagon posts 21 and in addition turn, so that nut body 1 is screwed together on the bolt 3, turn being overlapped piece 2 takes off and it can't be dismantled the nut body with instrument again, thereby reach antitheft effect, again, because the middle position of the circular groove 12 of nut body 1 is provided with a projection 14, and these projection 14 corresponding each arc groove 13 parts, be equipped with a projection 15, and make the apical margin of projection 15 be cut to the best (as shown in Figure 7) mutually with the circumference of circular groove 12 at least, so if utensils such as use pipe are can't plug together in slotted eye, thereby improve its anti-theft effect greatly.

In addition, being used for the means of fixation of automobile tire shown in the preceding figure of addressing, only is an example of using as the utility model, and and unrestricted application area of the present utility model, it also can be applicable to the locking that screws togather of other article, for example, and bicycle, various mechanical implements etc.

From the above mentioned, the utility model really can reach its creation purpose, and a kind of structurally improved anti-theft screw cap that improves anti-theft effect is provided.

In sum, the utlity model has the practical usefulness that significantly improves product, and it is really unprecedented, so meet the important document of utility model patent.

Claims

1, a kind of structurally improved anti-theft screw cap, comprise a nut body and turn cover piece, wherein: the nut body is a circular cylinder, it is characterized in that, described nut body one end is attacked and is set as the screw that can supply screw threaded, the other end is provided with the circular groove of an appropriate depth, and be provided with some arc grooves in the appropriate location of this circular groove, slightly be quincuncial slotted eye and make the overall concave groove form one, this arc groove can be provided with angle according to difference, and presents difform quincunx slotted eye, and the middle position in its circular groove is provided with a projection again, make corresponding each the arc groove part of this projection, be equipped with a projection;

One end of described turn cover piece is set as can be for the hexagon posts of standardized tool engaging turn, the other end is set as the sleeve part of a circle, this sleeve part just can be sleeved on the outer rim of nut body, again in the inboard bottom of sleeve part, the quincunx slotted eye part of corresponding nut body, be provided with one with the identical shaped rotating block of quincunx slotted eye.

2, structurally improved anti-theft screw cap as claimed in claim 1 is characterized in that, the apical margin of described projection is tangent with the circumference of circular groove at least.