CN201031857Y - Flat anti-theft anti-damage nut - Google Patents

Abstract

The utility model relates to a plane anti-theft anti-destroy nut; the utility model is characterized in that internal nuts are arranged for fastening and the shape is like a hollow flatheaded bolt with a tapered cap which is embedded into a tapered groove of an external nut; an internal hole is equipped with female threads which are matched with a screw and the outside is equipped with fine left-hand shallow threads which are matched with the external nut. The external nut shape is the same as a hexagon nut and a central hole is equipped with fine left-hand female threads which are matched with the internal nut; the locking strength is lower than that of the internal nut and the screw. The combined nut is arranged in the screw and screwed down; when the rated torque is reached, the threads of a disposable nut destroy sliding wires and can only skid around the internal nut; the cap of the internal nut is designed to be a plane end and the utility model can be made of stainless steel or colorful plastic; the utility model is elegant in appearance and colorful and can not be dismantled with conventional tools; in this way, the utility model can play an ornamental role with color compared with the ordinary anti-theft nut.

Description

Plane anti-theft and anti-damage nut

Technical field

The utility model relates to a kind of nut part, especially license plate of fastening piece and decorates anti-theft nut.

Background technique

At present, known conventional nut is convenient to loading and unloading because of it, also is convenient to the theft of crime one's share of expenses for a joint undertaking and destroys; Some have the nut of anti-theft feature, but lack decorative artistic effect.

Summary of the invention

In order to overcome above-mentioned deficiency, the utility model provides a kind of plane anti-theft and anti-damage nut, just can reach purpose not only antitheft but also attractive in appearance.

The technical scheme in the invention for solving the technical problem is: the plane anti-theft and anti-damage nut that is combined by inner nut and outer nut, it is characterized in that: the inner nut of fastening effect together is set, external form is as the conical cap screw of hollow tack, its cap embeds the cone-shaped groove of outer nut, endoporus is and the box thread of screw rod coupling that the outside is the left-handed shallow thread of closely-pitched that mates with outer nut.Outer nut is only to work the short-lived nut that drives the fastening effect of inner nut, and the same hexagon nut of external form, mesopore are and the left-handed box thread of closely-pitched of inner nut coupling that its locking intensity is lower than the locking intensity of inner nut and screw rod.The outer nut of earlier inner nut being packed into during use screws into a suit assembled nut.This assembled nut is packed into and is tightened by spanner behind the screw rod, and when reaching rated torque, short-lived outer nut thread damage stripped thread can only skid in the inner nut periphery, just again interior tightening nut can't be unloaded with conventional means and instrument, to reach antitheft purpose.The more important thing is, the through hole of inner nut is arranged to blind hole,, be arranged to the plane end socket, make it increase very strong decorative effect the tack of the conical cap of tack.Useful stainless steel or colored plastic are made, and light not only attractive in appearance is gorgeous but also can't dismantle with conventional tool holder, and that plays that general anti-theft nut can't play has a coloured decorating action of light.Here be noted that spiro rod length, behind the locking object, can not surmount in the concave surface end socket empty.

The beneficial effects of the utility model are: simple in structure, tamper robber is functional, ornamental by force, cost is low.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is an inner nut panorama schematic representation, and Fig. 2 is an outer nut panorama schematic representation, and Fig. 3 is that inner nut is dissected schematic representation, and Fig. 4 is that outer nut is dissected schematic representation, and Fig. 5 is that the assembled nut that is assembled into is dissected schematic representation, and Fig. 6 is a schematic top plan view.

The conical cap of 1. inner nuts is arranged to plane end socket among the figure, 2. with the coarse thread box thread of screw rod coupling, 3. with the left-handed shallow thread of closely-pitched of outer nut coupling, 4. with inner nut cap inner conical groove movingly, 5. with the left-handed box thread of closely-pitched of inner nut coupling.

Embodiment

In the drawings, the inner nut of fastening effect (1) together is set, external form is as hollow tack conical screw, its cap embeds the cone-shaped groove (4) of outer nut, endoporus is the box thread (2) that mates with screw rod, the outside is the left-handed shallow thread of closely-pitched (3) that mates with outer nut. and outer nut is only to work a short-lived nut that drives the fastening effect of inner nut, and the same hexagon nut of external form, mesopore are the left-handed box threads of closely-pitched (5) that mates with inner nut. and its locking intensity is lower than the locking intensity of inner nut and screw rod.This assembled nut is packed into and is tightened by spanner behind the screw rod, and when reaching rated torque, short-lived nut thread destroys stripped thread, can only skid in the inner nut periphery, just again interior tightening nut can't be unloaded with conventional means and instrument, to reach antitheft purpose.In addition with the tack of the conical cap of tack, be arranged to the plane end socket, light not only attractive in appearance is gorgeous but also can't dismantle with conventional tool holder, and that plays that general anti-theft nut can't play has a coloured decorating action of light.

Claims (3)

1. plane anti-theft and anti-damage nut, combine by inner nut and outer nut, it is characterized in that: the inner nut of fastening effect (1) together is set, external form is as the conical screw of hollow tack, endoporus is and the box thread (2) of screw rod coupling that the outside is the left-handed shallow thread of closely-pitched (3) that mates with outer nut, the same hexagon nut of outer nut external form, mesopore is and the left-handed box thread of closely-pitched (5) of inner nut coupling that its locking intensity is lower than the locking intensity of inner nut and screw rod.

2. by the described plane anti-theft and anti-damage nut of claim 1, it is characterized in that: the conical cap tack of its inner nut, be arranged to the plane end socket.

3. by the described plane anti-theft and anti-damage nut of claim 1, it is characterized in that: the conical cap (1) of the tack of inner nut, the cone-shaped groove (4) of embedding outer nut.

Images