CN105570270A

CN105570270A - Detachable anti-theft nut and bolt assembly

Info

Publication number: CN105570270A
Application number: CN201410646785.XA
Authority: CN
Inventors: 何天麟
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-11
Filing date: 2014-11-11
Publication date: 2016-05-11

Abstract

The invention discloses a detachable anti-theft nut and bolt assembly. The detachable anti-theft nut and bolt assembly is researched and developed based on the patent named as a trapezoidal nut and trapezoidal-head bolt assembly. The detachable anti-theft nut and bolt assembly is composed of a trapezoidal nut (trapezoidal-head bolt) and an assembly and disassembly nut. The detachable anti-theft nut and bolt assembly has an anti-theft function, a self-locking function and a unidirectional screwing function and can be assembled rapidly and disassembled rapidly. The detachable anti-theft nut and bolt assembly is generally used for fasteners, such as special fasteners for power equipment and transformer installation, special fastening screws for street lamp maintenance covers, and anti-theft screws of vehicle license plates, of outdoor equipment which is located in a sparsely-populated area and needs to be replaced, disassembled, maintained and assembled frequently.

Description

Detachable type anti-theft nut and bolt

Art:

The present invention relates to a kind of skill tool fastening piece, particularly a kind of detachable type anti-theft nut and bolt.

Background technique:

The present invention is the patent of invention title application on 02 28th, 2011; Trapezoidal nut and bolt with trapezoid head, the patent No.; Inspiration burst on the basis of ZL201110046532.5, makes trapezoidal nut and bolt with trapezoid head reach not only antitheft but also be convenient to by filling and the detachable type anti-theft nut of dismounting and bolt through creating acquisition a kind of handling nut [special tool] again.

Summary of the invention:

Anti-theft nut and bolt are a kind of fastening pieces not possessing disassembling function, accomplish that antitheftly can be convenient to again dismounting has just become one to be worth researching and solving.

The technical problem solved;

Solve when being arranged on trapezoidal nut [bolt head] in tightening nut cavity by pretightening force, interior external taper engagement self-locking, when by unscrewed power, cannot be separated the technical problem come off.Retain trapezoidal nut [bolt head] with the antitheft feature of profile, solve again and there are detachable and non-dismountable two conflicting technical problems on same object.

The present invention is to provide a kind of handling nut [special tool] be made up of tightening nut and dismounting push rod two parts and is combined into detachable type anti-theft nut and bolt with trapezoidal nut [bolt head].

Trapezoidal nut [bolt head] its feature, except profile reaches antitheft with spy, self-locking, unidirectional combination of tightening three functions, its profile is made up of the cone of two different amount in same truncated cone, what angle was large is truncated cone, what angle was little is be wrapped in the terraced steps on truncated cone outer cone wall, step inclined-plane and truncated cone shaft axis are 0-8 degree [Mo Shi tapering], the engagement of inside and outside circle tapering can reach tapering self-locking, cone inclined-plane segmentation little for angle cuts open by its step, be spirally wound on the cone wall of truncated cone, shape is as sky way, side profile is as stair step, therefore be called spiral terraced steps.For ease of the interior threaded hole of machining trapezoidal nut, arrange bottom truncated cone and can hide hexagonal concave station in spring washer, also can arrange the technique step being convenient to mechanical tapping, the washer outer diameter supporting with it should be greater than outside diameter bottom truncated cone.

Handling nut is made up of tightening nut and dismounting push rod two parts, its feature of tightening nut; Profile is cylindrical, rear end is polygon nut, and endoporus front end is the truncated cone that can contain trapezoidal nut [bolt head], internal cone wall is also wrapped the cavity of the spiral terraced steps matched with trapezoidal nut [bolt head], rear end is internal thread through hole, its feature of dismounting push rod; It is the plain bolt that external thread of screw matches with tightening nut rear end interior threaded hole, pitch is provided with one and is greater than trapezoidal nut internal thread [screw rod of bolt with trapezoid head] through hole, and dismounting push rod being screwed in tightening nut rear end internal thread hole count tooth is exactly a handling nut.

Mounting characteristic; Common screw [interior threaded hole] is screwed into after trapezoidal nut [bolt head] being screwed in handling nut, tightening nut is tightened with wrench, under unidirectional effect of tightening, make the self-locking of intermeshing of inside and outside circle cone be integrated, detachable type anti-theft nut [bolt] is now as conventional General fasteners, only just need can be screwed into screw rod of back-outing arbitrarily with wrench, install fastening after, dismounting push rod is tightened again immediately with wrench, top pressure trapezoidal nut [bolt head] separation until handling nut comes off, stays with the antitheft trapezoidal nut [bolt head] of profile.

The method dismounting of inside and outside circle tapering [Mo Shi tapering] self-locking of intermeshing of skilful use 0-8 degree, only handling nut directly need be twisted after being screwed into trapezoidal nut [bolt head] being tightened with wrench, trapezoidal nut [bolt head] can be removed by derotation.

Detachable type anti-theft nut [bolt] after dismounting, available two spanners are positive and negative twists tightening nut and with dismounting push rod, trapezoidal nut [bolt head] is separated secondary and use.

A key can only drive a lock, once the tapering of the truncated cone of trapezoidal nut [bolt head], the tapering that spiral is trapezoidal, the length of step, wherein any one changes, and tightening nut, must be supporting also just along with change, otherwise cannot dismantle.

Beneficial effect of the present invention;

Namely the present invention retains trapezoidal nut [bolt head] with the antitheft feature of profile, solve again and there are detachable and non-dismountable two conflicting technical problems on same object, get final product quick mounting, quick-detachable detachable type anti-theft nut and bolt again, be usually used in field, wilderness, the meagrely-populated fastening piece often needing again replacing, dismounting, maintenance, erection unit, as: power equipment and install transformer fastening piece used, the special screw of street lamp access cover, the anti-theft screw of license plate.

Figure of description:

Fig. 1 trapezoidal nut and bolt with trapezoid head (plan view);

Fig. 2 loads and unloads nut (plan view);

Fig. 3 detachable type anti-theft nut (plan view);

Fig. 4 detachable anti-theft bolt (plan view);

Fig. 5 installs, dismounting detachable type anti-theft nut and bolt (plan view);

Fig. 6 dismantles handling nut (plan view);

Fig. 7 stays with the antitheft trapezoidal nut of profile and bolt with trapezoid head (plan view);

Fig. 8 dismantles detachable type anti-theft nut and bolt (plan view);

In Fig. 1 to Fig. 8;

1 bolt with trapezoid head;

2 trapezoidal nuts;

3 tightening nuts;

4 dismounting push rods;

5 spring washers;

6 packing rings;

7 fastenings;

Embodiment:

Below in conjunction with accompanying drawing, the present invention is specifically described as follows;

Embodiment 1:

Shown in Fig. 1 Fig. 2 Fig. 3 Fig. 4, dismounting push rod 4 being screwed in tightening nut 3 rear end internal thread hole count tooth is exactly a handling nut Fig. 2, then is exactly detachable type anti-theft nut Fig. 3 and bolt Fig. 4 by trapezoidal nut 2 [bolt head] 1 screw-in handling nut Fig. 2.

Shown in Fig. 5 Fig. 6 Fig. 7, first supporting packing ring 6 is overlapped the screw rod of people's detachable anti-theft bolt Fig. 4, insert in fastening 7 mounting hole, cover people packing ring 6, spring washer 5, screw in detachable type anti-theft nut Fig. 3, tightening nut 3 is tightened with wrench, under unidirectional effect of tightening, make the self-locking of intermeshing of inside and outside circle cone be integrated, detachable type anti-theft nut Fig. 3 [bolt] figure is now as conventional General fasteners, only just need can be screwed into screw rod of back-outing arbitrarily with wrench, install fastening after, dismounting push rod 4 is tightened immediately with wrench, top pressure trapezoidal nut 2 and bolt with trapezoid head 1, the separation graph 6 until handling nut Fig. 2 comes off, stay with antitheft trapezoidal nut 2 [bolt head] 1 Fig. 7 of profile.

Embodiment 4:

Shown in Fig. 5 Fig. 8, only handling nut Fig. 2 directly need be twisted to be screwed on trapezoidal nut 2 [bolt head 1] and tighten Fig. 5 with wrench, under unidirectional effect of tightening, make inside and outside circle cone intermesh after self-locking is integrated, trapezoidal nut 2 [bolt with trapezoid head 1] is removed by derotation.Detachable type anti-theft nut Fig. 3 [bolt] Fig. 4 after dismounting], available two spanners are positive and negative twists tightening nut 3 and with dismounting push rod 4, trapezoidal nut 2 [bolt head 1] is separated secondary and use.A key can only drive a lock, and trapezoidal nut 2 [bolt head 1] must be supporting with handling nut Fig. 2, otherwise cannot by trapezoidal nut 2, and [bolt with trapezoid head 1] is dismantled.

Above-mentioned example limits the present invention never in any form, and the technological scheme that all employings are replaced on an equal basis or the mode of equivalent transformation obtains, all drops within protection scope of the present invention.

Claims

1. detachable type anti-theft nut and bolt, is made up of trapezoidal nut [bolt head] and handling nut, said trapezoidal nut [bolt head] its feature; Profile is wrapped spiral terraced steps on truncated cone outer cone wall, has antitheft, self-locking, unidirectionally tightens three functions, and handling nut is made up of two parts, its feature of tightening nut; Profile is cylindrical body, and rear end is polygon nut, and endoporus front end is the cavity that can contain trapezoidal nut [bolt head], and rear end is internal thread through hole, its feature of dismounting push rod; Be the plain bolt matched with tightening nut interior threaded hole, pitch has a through hole being greater than trapezoidal nut internal thread.

2. detachable type anti-theft nut according to claim 1 and its feature of bolt, installation is fastening after tightening tightening nut inside and outside circle cone engagement self-locking with spanner is unidirectional, tighten dismounting push rod top straightening again to come off to handling nut, leave trapezoidal nut [bolt head], dismounting is that after being loaded on handling nut screwing clamping, trapezoidal nut [bolt head] is removed in derotation.