CN2791331Y - Anti-theft-dismounting nut - Google Patents

Abstract

The utility model relates to a connecting tightening member, particularly a nut which can be prevented from being stolen and disassembled. The nut has the shape that the outer circle side of the nut is smooth. Ratchets are distributed on the top end part of a conical nut. When the is solely used, the nut only can be tightened on one direction and can not be disassembled. The utility model is convenient to disassemble. When the utility model is installed, a cylindrical outer sleeve can be additionally arranged on the outer side of the utility model, wherein the outer side surface of the cylindrical outer sleeve is provided with a thread and a hexagon. The utility model is applied to a special tool which is corresponding to a ratchet on the top of the conical nut, and can be tightened and disassembled by the common wrench, and the purposes that the utility model is not only prevented from being stolen and disassembled, but also can be flexibly and freely applied are achieved.

Description

The antitheft nut of tearing open

Technical field the utility model relates to a kind of stolen tightening nut of tearing open that prevents.

Background technique has had multiple nut that can antitheft dismounting in the prior art, substantially all adopting inside and outside jacket wall is interference fit and pinning riveted, not that can not to dismantle after fastening be exactly could dismantle with special-purpose upgrade kit, it is extremely inconvenient to cause for the construction maintenance, and its structure is more complicated all generally, the processing cost is all than higher, and heaviness.For example: Chinese utility model patent 96201873.2 adopts the inside and outside cover of taper, with the form of interior extruding nut is rotated, and the disengaging of when reaching certain torsional moment, skidding, thus it can't be dismantled.And for example: Chinese utility model patent 98203426.1, to form by internal and external layer ring, pin, outer layer ring is enclosed within on the inner layer ring and the pin anchoring forms, and has anti-back silk, theft protection function.Above disadvantage is can't be fastening once more after nut is loosening naturally.

Summary of the invention the utility model provides a kind of structure comparatively simple, can effectively prevent to steal dismounting, and available common wrench and simple special accessories are arbitrarily loosening and prohibit solid.

A kind of antitheft nut of tearing open is made up of circular cone or barrel nut (1), cylindrical jacket (2).The conical nut upper-end surface is shaped on spill ratchet (3), and lower end cylindrical side is processed into the recessed table top of side (7).Round jacket (2) outside first half is processed with screw thread (4), and be processed in the Lower Half outside can be with the common wrench instrument to its flat side or six sides (5) that act on rotation, and lower inside is made the table top (6) to convex.And the height of table top (7) is greater than the thickness of table top (6), make conical nut (1) and overcoat (2) combination after, overcoat (2) is under any circumstance for movingly, energy freely rotate.

Description of drawings

Figure one is conical nut and cylindrical jacket composite structure schematic representation.

Figure two is conical nut and cylindrical jacket composite structure plan view.

Figure three is conical nut structural representations.

Figure four be when antitheft tear open nut fastening with when dismounting, the very heavy spanner profile of employed ratchet schematic representation.

Embodiment

Example 1, the conical nut (1) that will have a ratchet reach the moment requirement with its corresponding ratchet very heavy (8) is fastening under the effect of common wrench.During dismounting, be tightened against on overcoat (2) outside first half screw thread (4) with special-purpose cap sleeve, backward rotation ratchet very heavy (8) is easily backed off nut (1).

Example 2, the conical nut (1) that will not install cylindrical jacket (2) additional use corresponding ratchet very heavy (8) to be issued to the disposable fastening moment that requires in the effect of common wrench separately.Because of profile is smooth taper, make the common wrench instrument can't be to its field-strip.

Among the embodiment of the present utility model, conical nut (1) ratchet that adopt at the top (3) is three with ratchet (10) on the corresponding special-purpose ratchet very heavy (8), is symmetrically distributed on nut (1) and the ratchet very heavy (8).General during actual the use for preventing the very heavy spanner of a certain ratchet, plural ratchet can be designed to uneven distribution.

Claims (6)

1, a kind of antitheft nut of tearing open, it is shaped as conical or cylindrical (1) of smooth in appearance, and last planar ends is processed as ratchet (3) shape and the outside is added with cylindrical jacket (2) composition.

2, the antitheft nut of tearing open according to claim 1 it is characterized in that planar ends is processed as two or more ratchets (3) shape structure on the nut, and ratchet (3) breach angle is in 45 °～75 ° scopes.

3, the antitheft nut of tearing open according to claim 1, its cylindrical jacket (2) outside first half is processed with screw thread (4), and Lower Half is processed as can use flat side or six sides of common wrench instrument to its effect.

4, antitheft nut (1) and its overcoat (2) torn open according to claim 1 is under any circumstance for movingly, and energy freely rotate.

5, the antitheft nut of tearing open according to claim 1 when its conical nut (1) is not installed overcoat (2), can't be dismantled after fastening.

6, the antitheft nut of tearing open according to claim 1, can by with the very heavy spanner of the corresponding ratchet of its ratchet (3) (8) dismounting, general for preventing the very heavy spanner of a certain ratchet (8), can be designed to more than two and uneven distribution with ratchet (3).

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