CN2379637Y - Anti disassembling of screw nut and sapnner therefor - Google Patents

Abstract

The utility model provides a screw nut or a screw bolt which can not be disassembled by common tools, such as a common wrench, a pipe wrench, etc. and a special spanner. The screw nut is composed of a screw nut core and an outer sleeve, and the special spanner is mainly composed of a spanner body and a spanner core. The lower part of the spanner body is provided with an operating hole which is eccentric with a positioning hole which is arranged at the upper part. While, the lower part of the spanner core is provided with a spanner head, the upper part is provided with a spanner bar, and the spanner head and the spanner bar are eccentric. The upper part of the spanner core is provided with a handle for tightly screwing or loosening the screw nut or the screw bolt. When the utility model is operated, inserting the spanner head in a spanner head hole which is arranged at the upper part of a screw nut core, sheathing the spanner body on the outer circle of the outer sleeve of the screw nut and screwing the spanner body and the spanner core tightly, the utility model can be operated.

Description

Anti-disassembling nut and spanner thereof

The utility model relates to a kind of fastening piece or machine part, particularly a kind of anti-disassembling nut, bolt and spanner thereof.

The fastener nut of current widespread usage and bolt head have shapes such as hexagon, interior hexagon, square.A common feature of these fastening pieces is exactly that available common spanner screws or unclamps, and causes with this class fastening piece fastening member or equipment and is stolen by the lawless person, causes very big loss to national wealth.

The utility model purpose provide the general spanner of a kind of usefulness the nut or the bolt that can not screw or unclamp, and the spanner that is exclusively used in them.

The technical solution of the utility model is: nut is made of nut core and overcoat, match with the overcoat endoporus in the outer garden of nut core, and nut core is placed in the interior step of overcoat endoporus lower end, there is a spanner head hole concentric with the inside and outside garden of overcoat the upper end of nut core.

Its special spanner mainly is made of spanner body and wrench core, and a handle hole that matches with the outer garden of nut overcoat is arranged at the bottom of spanner body, and a positioning hole is arranged at top, and there is certain throw of eccentric in this two hole.The wrench core bottom is for being inserted into the garden cylindricality spanner head in spanner head hole, nut core top, and wrench core top is the positioning rod that is inserted in the positioning hole of spanner body top, and positioning rod garden post and spanner head garden post have certain throw of eccentric.At the top of spanner bar jug (moving bar or hexagonal are first-class).

Nut structure of the present utility model also available with as the structure of bolt head, the special spanner structure is identical.

The utility model has the advantages that:

Allow to dismantle nut or bolt without the person in charge.This fastening piece on the equipment of being tightened on, nut core places overcoat, step is arranged at the nut core bottom, overcoat is limited on the nut core, overcoat nut core rotation relatively, can not take off from nut core, and the overcoat outside is the garden, can prevent that the lawless person from turning on nut with instruments such as common spanner, pipe wrench or bolt is stolen national property.As field facility of floor-lamp stolen repeatedly on the urban lawn or field work etc.In addition, all inequality with current fastener forms that adopts and operational means, be suitable for adopting in some specific equipment, increased the category of fastening piece.

Accompanying drawing 1 is the special spanner sectional view

Accompanying drawing 2 is enclosed within sectional view on the anti-disassembling nut for spanner

Accompanying drawing 3 is enclosed within sectional view on the anti-demounting bolt head for spanner

Embodiment one

Present embodiment is an anti-disassembling nut and spanner (seeing accompanying drawing 2) thereof, and its special spanner (seeing accompanying drawing 1) is to be made of spanner body 1, wrench core 6 and handle 11.Spanner body 1 bottom endoporus is a handle hole 8, the top endoporus is a positioning hole 9, handle hole 8 is an eccentric opening with positioning hole 9, its throw of eccentric is e, and wrench core 6 is divided into two sections garden posts, and epimere garden post is a positioning rod 10, be inserted in the positioning hole 9 movingly, hypomere garden post is a spanner head 7, and 7 two garden posts of positioning rod 10 and spanner head are relative eccentric, and its throw of eccentric is e.Visible nut is nested together by garden cylindricality nut core 3 and garden cover shape overcoat 2 from accompanying drawing 2, match with the interior garden of overcoat 2 in the outer garden of nut core 3, the nut core lower step is inserted in the overcoat bottom in the step 4, when nut core is tightened on the bolt, overcoat nut core rotation relatively, but can not take away.There is a spanner head hole 5 concentric with overcoat 2 inside and outside gardens visible nut core 3 upper ends from accompanying drawing 2.During operation match with the spanner head hole 5 on nut core top in the spanner head 7 outer gardens of wrench core bottom, spanner body bottom handle hole is enclosed within on the outer garden of nut overcoat, because of the relative offset with the spanner head of the positioning rod on the wrench core equals spanner body positioning hole and spanner head hole, nut core upper end offset, so it is appropriate to be easy to assembling when operation, when operation, as long as the spanner body is screwed (this moment, the sense of rotation and the nut of wrench core were consistent) with the wrench core opposite direction, just can firmly screw or unscrew by the handle 11 that is through in the wrench core hole.After screwing, it is appropriate to take spanner away keeping, does not have special spanner, and other staff are difficult to dismantle.

Embodiment two

Present embodiment is that an anti-demounting bolt and its special spanner of spanner (seeing accompanying drawing 3) (seeing accompanying drawing 1) structure thereof are fully identical with embodiment one, visible bolt head 3 from accompanying drawing 3 ' with garden shape overcoat 2 ' be nested together, match with the interior garden of overcoat in the outer garden of bolt head, the bolt head lower step be inserted in step 4 in the overcoat bottom ' in.Bolt head upper end have a spanner head hole 5 concentric with overcoat 2 ' inside and outside garden '.During operation, the spanner head of wrench core bottom be inserted in spanner head hole, bolt head upper end 5 ' in movingly, spanner body bottom handle hole is enclosed within on the outer garden of bolt head overcoat, because of the sense of rotation of wrench core is consistent with the bolt head sense of rotation, just can so need only spanner body and wrench core opposite direction screwed.Firmly screw bolt head by the handle 11 that is through in the wrench core hole, otherwise can unclamp.

Claims (4)

1, a kind of anti-disassembling nut, it is characterized in that nut is made of nut core and overcoat, matches with the overcoat endoporus in the outer garden of nut core, and be placed in the interior step of overcoat bottom, the upper end portion of nut core have one with the outer garden of nut core, the outer concentric spanner head hole, garden of overcoat.

2, a kind of spanner is characterized in that, mainly is made of spanner body and wrench core, and a handle hole that matches with the outer garden of nut overcoat is arranged at the bottom of spanner body, and a positioning hole is arranged at top, and two holes are eccentric openings.The wrench core bottom is for inserting the garden cylindricality spanner head in spanner head hole on the nut core, and wrench core top is the positioning rod that is inserted in the spanner body positioning hole, and wrench core bottom spanner head garden post and positioning rod garden, top post are eccentric garden post.

3, spanner according to claim 2 is characterized in that, the eccentric amount e in handle hole that matches with nut overcoat in spanner body bottom and positioning hole two holes, spanner body top equals the eccentric amount e of wrench core bottom spanner head garden post and positioning rod garden, top post.

4, according to claim 2,3 described spanners, it is characterized in that spanner bar top jug or six square toes etc.

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