CN2177120Y

CN2177120Y - Anti-loose, anti-theft fastening bolt

Info

Publication number: CN2177120Y
Application number: CN 93231389
Authority: CN
Inventors: 张吉林
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-17
Filing date: 1993-07-17
Publication date: 1994-09-14
Anticipated expiration: 2003-07-17

Abstract

The utility model provides an anti-loose and anti-theft fastening screw bolt. The diameter of the screw bolt becomes thinner in a step shape at a screw thread end, the spiral direction of the thin segment of the screw thread is opposite to the spiral direction of the inside thick segment of the screw thread and matches with an auxiliary screw nut, a center hole is arranged in the axial direction of a screw rod or a segment of internal screw thread hole is arranged extending from the front end to the back end. The directions of the spiral threads of the internal and the external screw threads are the same or opposite, the back segment of an embedded part matching with the center hole or the internal screw thread hole forms a cone shape, a tail end surface is provided with convexity or concavity of a top groove, which is in the shape of polygon or other multiple geometric figures. The utility model can not be demounted without using a matched special tool. The utility model can be used for various articles needing fastening. The utility model has the advantages that the loosing and the theft can be prevented, the use is convenient, etc.

Description

Anti-loose, anti-theft fastening bolt

The utility model relates to a kind of fastening piece, and more particularly being can be anti-loosening, the clamping bolt of theft protection.

The bolt of prior art is and has the spiral silking on the isometrical screw rod, mix nut with matching during use again, loosening easily under the effect of vibrations or other external force with the object of this bolton, even nut is come off, lose fastening effect, the person that do not cause the accident therefrom is common.For method that prevents from that nut from coming off, adopt usually to add a spring washer under the nut or the method that the opening pin is plugged in hole of horizontal brill on screw rod, but all can not anti-theft and anti-damage.

The purpose of this utility model provides a kind of fastening back and is difficult for becoming flexible, and the user can conveniently install and dismantle, but the non-detachable anti-loose anti-theft clamping bolt of his human general purpose tool.

The utility model can be realized by following measure: at screw rod (1) center hole (3) arranged axially, this hole can connect whole screw rod (1), the also one section interior threaded hole (3) that extends to the back-end from front end, the internal thread (4) in this hole (3) is identical or opposite with the helix direction of outside thread (5), the diameter that screw rod (1) front end is one section is the step sample and attenuates, the rotation direction of the outside thread of tapered segments (8) is complementary with auxiliary nut (6) with opposite near the rotation direction of the outside thread (5) of its inboard thick section or pitch is different.Some axially opens (11) can be arranged on the front bulkhead of tapped hole (3) or center hole (3), the embedded piece (9) that matches with tapped hole (3) can be major part screw or sunk screw, it also can be the double-screw bolt that end is taper, its breech face has inverted draw cut or is equivalent to polygonal or other the multiple geometric depression or the projection of inverted draw cut, the embedded piece (9) that matches with center hole (3) is that tail end is the special-shaped stove bolt that runs through whole screw rod (1) of taper or wing claw-like, and its other end and auxiliary primary nut (6) are complementary.

The utility model is described further in conjunction with the accompanying drawings:

Fig. 1 is a dual fail-safe anti-loose anti-theft clamping bolt schematic representation.

Fig. 2 is the abnormity nut schematic representation.

Fig. 3 is a sunk screw embedded piece schematic representation.

Fig. 4 is that screw front end increases thick formula anti-loose anti-theft clamping bolt schematic representation.

Fig. 5 is the anti-loose anti-theft clamping bolt schematic representation that screws in the fixed block tapped blind hole.

Among the figure: 1-screw rod, 2-nut, 3-tapped hole or center hole, 4-internal thread, the 5-outside thread, 6-auxiliary nut, 7-packing ring or pad money, 8-screw rod thin segment outside thread, the 9-embedded piece, 10-inverted draw cut or be equivalent to the depression of inverted draw cut, 11-hole wall opening, 12-wing stops pawl.

At first with reference to Fig. 1, Fig. 2, Fig. 3

The diameter that screw rod 1 front end is one section is the step sample and attenuates, the outside thread 8 of thin segment part is opposite with Hand of spiral near thick section outside thread 5 of its inboard, or pitch difference, with matching is auxiliary nut 6, this auxiliary nut can be a plain nut, also can be the abnormity nut 6 of the rounded depression in outer end shown in Figure 2.Screw rod 1 the one section interior threaded hole 3 that extends to the back-end from front end axially arranged, with matching is the embedded piece 9 that can stop after screwing that auxiliary nut 6 retreats, this embedded piece can be the major part screw, it also can be sunk screw shown in Figure 3, inverted draw cut is arranged on the breech face of this embedded piece 9 or be equivalent to polygonal or other the multiple geometric depression 10 or the projection of inverted draw cut, be used for generally can using general inverted draw cut when locking, be used for when antitheft, then available special inverted draw cut, as regular pentagon, positive Heptagon, quincunx etc., use regular pentagon with matching when tightening or unloading, positive Heptagon, raised or sunken special tool such as quincunx.During use, screw rod 1 is inserted in the hole of fastened object, with nut 2 that fastened object is fastening, the auxiliary nut 6 of screwing on again, make it and nut 2 jam-packeds, if it is gapped therebetween, can serve as a contrast with packing ring or pad money 7 in the inboard or the outside of nut 2, so can play enough tangible locking having acted on (when only locking, tapped hole 3 and the embedded piece 9 of Fig. 1 can not wanted, auxiliary nut 6 can be processed into the cap shape), again embedded piece 9 is screwed in tapped hole 3, it is consistent with the rotation direction that auxiliary nut unloads that it screws direction, and the tail end of embedded piece 9 and auxiliary nut are close to, and increased by a cover anti-loosing and antitheft device so again (in fact, auxiliary nut among Fig. 16 and tapered segments screw rod are removed, nut 2 adopts abnormity nut 6 shown in Figure 2 to match with sunk screw sample embedded piece 9 shown in Figure 3, can play the effect of anti-loose anti-theft equally), become the dual fail-safe loosing and theft preventing bolt.For this bolt is more insured and not corrosion of screw thread, can be on the surface of contact of auxiliary nut 6 and embedded piece 9 rust preventing agent and tackiness agent such as painting.

Below with reference to Fig. 4

Screw rod 1 is isometrical screw rod, at its threaded front end one section tapped hole 3 that extends is to the back-end arranged axially, hole wall between internal thread 4 and the outside thread 5 has some axially opens 11, embedded piece 9 is the tapered double-screw bolt of back segment, and its breech face has the described inverted draw cut of Fig. 1 or is equivalent to the depression or the projection of inverted draw cut.During use, after will needing fastening object fastening with screw rod 1 and nut 2, use the special tool that matches with embedded piece 9 that embedded piece 9 is screwed in the tapped hole 3 again, because the rear end of embedded piece 9 is on taper and tapped hole 3 walls opening 11 to be arranged, so the screw thread hole wall can be strutted, make its week footpath increase (terminal week footpath can greater than the internal diameter of nut 2), nut 2 can not retreat, played locking effect, do not have the special-purpose instrument that matches with special impression or projection and just embedded piece 9 can not be screwed off, and then can play antitheft effect, as embedded piece 9 is taken off, nut 2 can screw off as usual, so safe ready.

Refer again to Fig. 5

Screw rod 1 is isometrical screw rod, along it center hole 3 of a perforation total length is arranged axially, no screw thread in this hole, the hole wall leading portion has some openings 11, the embedded piece 9 that matches with center hole 3 can be that as shown in Figure 4 rear end is the taper double-screw bolt, also can be the small screw that there is wing catch pawl 12 rear end shown in Figure 5, every pawl of wing catch pawl 12 is and inner adapts with opening 11, the outer end is slightly larger than opening 11 splits the shape empennage.Its other end matches with auxiliary primary nut 6, and this auxiliary primary nut 6 can be made as required such as pentagon, Heptagon or other geometric figures, with corresponding special tool degree of tightness.During use, small screw sample embedded piece 9 inserts from the front end of center hole 3, show to the rear end, if its end is a wing catch pawl 12, then make the inner of pawl embed opening 11, screw rod 1 is screwed in the blind hole of fastened object fastening after, screw auxiliary primary nut 6 with special tool again, embedded piece 9 this moment rear end tapered or that be claw type is pulled and enters in the hole in or in the opening, make the opening support greatly, the front end chap of screw rod 1, make the blind hole internal thread jam-packed of front end outside thread and fastener, prevent to become flexible, if the blind hole depths diameter of fastened thing is big a little, anti-loosing effect will be better.

Present technique is not limited by the foregoing description, can be according to above-mentioned principle and known technology flexible.

The advantages such as compared with the prior art the utility model has anti-loose anti-theft, easy to use.

Claims

1, a kind of clamping bolt of anti-loosening, theft protection is made of screw rod (1), and what it is characterized in that screw rod (1) axially has a center hole (3), and the diameter of screw rod (1) front end is the step sample and attenuates.

2, bolt according to claim 1, it is characterized in that the one section interior threaded hole of center hole (3) for extending to the back-end from front end, its internal thread (4) is identical or opposite with the helix direction of the outside thread (5) of screw rod (1), and center hole (3) also can run through whole screw rod (1).

3, bolt according to claim 1, the outside thread (8) that it is characterized in that screw rod (1) front end thin segment part is complementary with auxiliary nut (6) with opposite near its inboard thick section outside thread (5) rotation direction.

4, bolt according to claim 1 is characterized in that the embedded piece (9) that matches with interior threaded hole (3) is major part screw or sunk screw, and its breech face has inverted draw cut or is equivalent to being of inverted draw cut multiple geometric depression or projection.

5, bolt according to claim 1, the front end that it is characterized in that screw rod (1) can not attenuate yet, some axially opens (11) can be arranged on the wall of tapped hole (3), the embedded piece (9) that matches with center hole (3) is the double-screw bolt that the tail end section is taper, or its tail end runs through the stove bolt of whole screw rod (1) for wing claw-like, and the other end and auxiliary primary nut (6) are complementary.