CN2282088Y

CN2282088Y - Anti-theft bolt

Info

Publication number: CN2282088Y
Application number: CN 96237935
Authority: CN
Inventors: 夏道国
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-12-31
Filing date: 1996-12-31
Publication date: 1998-05-20
Anticipated expiration: 2006-12-31

Abstract

The utility model discloses a theftproof bolt, comprising a bolt and a fastening nut 2. The top of a screw rod 1 for the bolt has an axial hole 3, and a radial hole 4 is arranged on the screw rod 1. A connector pin 6 with a spring 5 is arranged inside the axial hole 3, and a spacer pin 7 is arranged inside the radial hole 4. A slot is arranged on the lateral wall of the spacer pin 7. When the utility model is used, workpieces can be fastened by the fastening nut 2, the spacer pin 7 is inserted in the radial hole 4, the spacer pin 7 is locked by the connector pin 6, and the spacer pin 7 can prevent the fastening nut from retreating. The theftproof purpose can be achieved.

Description

A kind of anti-theft bolt

The utility model relates to a kind of fastening piece, particularly a kind of anti-theft bolt.

At present, plain bolt is applied on various machines, the equipment widely.Because plain bolt has characteristics easy to loading and unloading, when this class bolt is used for electric transmission line connection, communication, mapping and navigation mark etc. and is positioned on open-air iron tower tower material and the metal frame, the offender can utilize the detachability of plain bolt to carry out theft crime, they can reach the crime purpose by common handling instrument easy to use at short notice, cause a large amount of publicly and civilian installation stolen or destroy, cause damage to the country and people's life.

The purpose of this utility model is: a kind of anti-theft bolt that can effectively stop the improper dismounting of bolt and nut is provided.

For achieving the above object, solution of the present utility model is: it comprises bolt, tightening nut, the bolt screw tip has an axial bore, have a radial hole on the screw rod, be provided with the latch of band spring in the axial bore, be provided with position limit pin in the radial hole, the front end of position limit pin is the wedge shape inclined-plane, has the groove that cooperates with latch on the sidewall.

After using the utility model, position limit pin is blocked by latch, and the rear end of position limit pin flushes with screw flight or exceeds major diameter of thread, and tightening nut can't be withdrawed from, thereby stops the dismounting of bolt and nut, plays antitheft effect.

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.

Fig. 1 is a structure cross-sectional schematic of the present utility model.

Fig. 2 adds the structure cross-sectional schematic of anti-theft nut for the utility model.

Fig. 3 is the three-view diagram that the utility model latch 6 and position limit pin 7 cooperate an embodiment.

Fig. 4 is the three-view diagram that the utility model latch 6 and position limit pin 7 cooperate another embodiment.

Anti-theft bolt as described in Figure 1, it comprises bolt, tightening nut 2, has an axial bore 3 on bolt screw rod 1 top, have radial hole 4 on the screw rod 1, be provided with the latch 6 of band spring 5 in the axial bore 3, from radial hole 4 inwards, latch 6 slightly stretches out about the interior 1mm of radial hole.During use, behind tightening nut 2 fastening workpiece, position limit pin 7 is inserted radial hole 4, the front end of position limit pin 7 is the wedge shape inclined-plane, has the groove that cooperates with latch 6 on the sidewall of position limit pin 7.Beat position limit pin 7 rear ends with hammering, the spring 5 of extruding latch 6 rear ends, position limit pin 7 front end wedge shape inclined-planes retreats latch 6.When position limit pin 7 continued to insert, latch 6 can be under the effect of spring 6, snapped in the groove that position limit pin 7 sidewalls have, position limit pin 7 is blocked, and at this moment, the rear end of position limit pin 7 flushes with screw flight or slightly exceeds major diameter of thread, tightening nut 2 can not be withdrawed from, reach antitheft purpose.

Anti-theft bolt as shown in Figure 2 installs an anti-theft nut 8 additional on the bolt screw rod 1, have on the anti-theft nut 8 and the identical radial hole of screw rod 1 radial hole 4.Behind the tightening nut 2 fastening workpiece, the anti-theft nut 8 of screwing on, nut 8 radial holes are alignd with screw rod 1 radial hole 4, insert position limit pin 7, beat position limit pin 7 rear ends with hammering, when latch 6 snaps in the groove of position limit pin 7, position limit pin 7 rear ends are concordant with anti-theft nut 8 outer walls, anti-theft nut 8 is locked, and anti-theft nut 8 locking tightening nuts make it and can not become flexible.

Square position limit pin 7 as shown in Figure 3, its pairing radial hole 4 is a square hole, a side of its sidewall has groove.

Circular position limit pin 7 as shown in Figure 4, its pairing radial hole 4 is a circular hole, has a ring recess on its sidewall.

Use position limit pin 7 as shown in Figure 3, Figure 4, make position limit pin 7 contrapositions very simple, can improve the work effect.

Latch 6 and position limit pin 7 can be made with high duty metal or through heat treatment hardening metal, to prevent the offender at short notice, steal with the sawed-off screw rod of hacksaw.

Claims

1, a kind of anti-theft bolt, it comprises bolt, tightening nut (2), it is characterized in that: bolt screw rod (1) top has an axial bore (3), have a radial hole (4) on the screw rod (1), be provided with the latch (6) that has spring (5) in the axial bore (3), be provided with position limit pin (7) in the radial hole (4), the front end of position limit pin (7) is the wedge shape inclined-plane, has the groove that cooperates with latch (6) on the sidewall.

2, anti-theft bolt as claimed in claim 1 is characterized in that: spiral shell osmanthus screw rod (1) is provided with an anti-theft nut (8), has radial hole on anti-theft nut (8) wall.

3, anti-theft bolt as claimed in claim 1 or 2 is characterized in that: the radial hole (4) on screw rod (1) and the anti-theft nut (8) is circular apertures or square hole, and position limit pin (7) is the circular or square cube supporting with radial hole (4).

4, anti-theft bolt as claimed in claim 1 is characterized in that: a side of position limit pin (7) sidewall or prolong sidewall one circle and have the groove that cooperates with latch (6).