CN201133413Y - Convex shoulder concave surface decoration tubular anti-theft nut - Google Patents

Abstract

The utility model relates to a shrouded concave surface decorative tubular anti-theft nut which is characterized in that a fastening inner nut is arranged, the appearance of which is like a hollow flat-head conical cap screw; the cap of the inner nut is inlaid in a conical groove of an outer nut, the inner hole is box thread matching with a screw rod and the outside is fine pitch left hand shallow thread matching with the outer nut. The appearance of the outer net is thick-wall tubular; the upper orifice edge of the outer nut is an arc-shaped heave, the middle hole is fine pitch left hand box thread matching with the inner nut, and the locking strength is lower than the locking strength between the inner nut and the screw rod. The combined nut is tightened after put in the screw rod; when the rated torque is reached, ephemeral nut thread is damage and slides only on the peripheral of the inner nut; in addition, the cap of the inner nut is designed into a concave surface seal head with stainless steel or color plastics, which not only is elegant and sharp but also cannot be clamped and removed by conventional tools; therefore, the shrouded concave surface decorative tubular anti-theft nut can play the role of light and color decoration which cannot be realized by common anti-theft nuts.

Description

The convex shoulder concave surface is decorated the tube-like anti-theft 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 convex shoulder concave surface to decorate the tube-like anti-theft 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: decorate the tube-like anti-theft nut by the convex shoulder concave surface that inner nut and outer nut combine, 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 external form is the heavy wall tubulose, and the upper orifice edge is the arcuation projection, and mesopore is 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 pipe wrench 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,, be arranged to the concave surface 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 recessed planar 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, the 6. upper orifice of arcuation projection.

Embodiment

In the drawings, the inner nut of fastening effect (1) together is set, and external form is as hollow tack conical screw, and its cap embeds the cone-shaped groove (4) of outer nut, 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.Outer nut is only to work the short-lived nut that drives the fastening effect of inner nut, and external form is the heavy wall tubulose, and the upper orifice edge is arcuation projection (6), and 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.This assembled nut is packed into and is tightened by pipe wrench 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 concave surface 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 (2)

1, a kind of convex shoulder concave surface is decorated the tube-like anti-theft 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 hollow cone shape screw of concave surface end socket, 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, the outer nut external form is the heavy wall tubulose, the upper orifice edge is arcuation projection (6), 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, decorate the tube-like anti-theft nut by the described convex shoulder concave surface of claim 1, it is characterized in that: recessed conical cap of inner nut, the cone-shaped groove (4) of embedding outer nut.

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