CN205663725U

CN205663725U - Nut

Info

Publication number: CN205663725U
Application number: CN201620535967.4U
Authority: CN
Inventors: 李建忠
Original assignee: NINGBO YINZHOU HAISHENG MACHINERY CO Ltd
Current assignee: NINGBO YINZHOU HAISHENG MACHINERY CO Ltd
Priority date: 2016-06-02
Filing date: 2016-06-02
Publication date: 2016-10-26
Anticipated expiration: 2026-06-02

Abstract

The utility model provides a nut belongs to mechanical technical field. It has solved the easily not hard up problem of current nut. This nut includes the spiral shell body and the lower spiral shell body, set up on the last spiral shell body and the spiral shell body down and link up mutually and with the screw hole of internal diameter, radial outside extension was formed with extension portion on the spiral shell body deviated from the terminal surface of the spiral shell body under, outside protruding formation has a plurality of teeth of preventing changeing on extension portion's outer terminal surface, the annular groove has been seted up on the last spiral shell body, be equipped with a plurality of encircleing at screw hole spacing arc wall all around in the annular groove, spacing arc wall one end flushes bottom the annular groove, the other end is inwards sunken gradually, down the spiral shell body insert locate the spiral shell internal and down spiral shell dignity up the one end of the spiral shell body arc lug has, arc lug one end flushes with lower spiral shell body terminal surface, the other end is upwards protruding gradually, and the arc lug can block and locates in the spacing arc wall when going up the spiral shell body and descend the spiral shell to personally experience sth. Part of the body unilateral movement relatively. The utility model has the advantages of simple structure, relax effectual.

Description

A kind of nut

Technical field

This utility model belongs to field of mechanical technique, particularly to a kind of nut.

Background technology

In daily production and life, nut is often because vibration loosens.In order to ensure nut fastening time from Change the line of production fastening that is raw and that ensure bolt, when the form that a lot of occasions use nut-welding prevents nut from fastening with bolt with Turn phenomenon, but welded nut is due to needs welding procedure, therefore there is environmental pollution and add labor intensity and the work of workman Skill cost.

Summary of the invention

The purpose of this utility model is to there are the problems referred to above for existing technology, it is proposed that a kind of simple in construction, put anti- The nut only loosened.

The purpose of this utility model can be realized by following technical proposal: a kind of nut, it is characterised in that include spiral shell Body and lower breechblock, offer on upper breechblock and lower breechblock and connect and with the screwed hole of internal diameter, deviate from breechblock at lower breechblock End face on extend radially outwardly and be formed with extension, on the outer face of extension, outwardly convex is formed with some antiturning pitch, Upper breechblock offers annular groove, in annular groove, is provided with some spacing arcuate grooves being looped around screwed hole surrounding, spacing Arcuate groove one end flushes with bottom annular groove, and the other end gradually caves inward, and lower breechblock is inserted in the interior and lower breechblock of breechblock Face up one end of breechblock has some arc bumps arranged with spacing arcuate groove one_to_one corresponding, arc bump one end and lower spiral shell Body end face, the other end gradually raises up, and when upper breechblock descends breechblock one-way movement relatively, arc bump can be arranged in limit In the arcuate groove of position.

Compared with prior art, this utility model, by nut is divided into upper breechblock and lower breechblock, has on lower breechblock Extension, by the antiturning pitch on extension, in lower breechblock rundown process, antiturning pitch can progressively embed matched parts The inside of end face, and insert depth can produce along with the increasing of screw-down torque enough anti-rotation resistances away from effectively prevent with Turn the generation of phenomenon；After lower breechblock screws, upper breechblock is installed on bolt and threadingly precession, when upper breechblock is against extremely Time on lower breechblock, arc bump is fastened in corresponding spacing arcuate groove, now goes up breechblock when tightening, by arc bump meeting Drive lower breechblock again to screw simultaneously, thus ensure lower breechblock antiturning pitch can deeper into the inside being embedded in parts end face, Improving the anti-loosing effect of this nut, and when part of appliance has shrinkage pool, when screw rod is inserted in shrinkage pool, lower breechblock is along screw rod When being threaded to cannot further make lower breechblock screw with hands or instrument at shrinkage pool, lower breechblock can be driven to continue by screwing upper breechblock Continuous inwardly screw, so that being installed on screw rod of can consolidating of this nut.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of upper breechblock in this utility model.

Fig. 3 is the structural representation of lower breechblock in this utility model.

In figure, 1, upper breechblock；11, annular groove；12, spacing arcuate groove；2, lower breechblock；21, extension；211, anti-rotation Tooth；22, arc bump；3, screwed hole.

Detailed description of the invention

The following is specific embodiment of the utility model and combine accompanying drawing, the technical solution of the utility model is made further Description, but this utility model is not limited to these embodiments.

As shown in Figure 1 to Figure 3, this nut includes breechblock 1 and lower breechblock 2, offers on upper breechblock 1 and lower breechblock 2 Connect and with the screwed hole 3 of internal diameter, deviate to extend radially outwardly on the end face of breechblock 1 being formed with extension at lower breechblock 2 21, on the outer face of extension 21, outwardly convex is formed with some antiturning pitch 211, offers annular groove on upper breechblock 1 11, it is provided with some spacing arcuate grooves 12 being looped around screwed hole 3 surrounding, spacing arcuate groove 12 one end and annular in annular groove 11 Flushing bottom groove 11, the other end gradually caves inward, in lower breechblock 2 is inserted in breechblock 1 and lower breechblock 2 faces up breechblock 1 One end there is some arc bumps 22 arranged with spacing arcuate groove 12 one_to_one corresponding, arc bump 22 one end and lower breechblock 2 End face, the other end gradually raises up, and when upper breechblock 1 descends breechblock 2 one-way movement relatively, arc bump 22 can be arranged in In spacing arcuate groove 12.

When using this nut, first lower breechblock 2 is installed on a screw rod, then with hands or instrument by lower breechblock 2 along spiral shell Screw thread on bar screws, owing to having extension 21 on lower breechblock 2, by the antiturning pitch 211 on extension 21, at lower breechblock In 2 rundown process, antiturning pitch 211 can progressively embed the inside of matched parts end face, and insert depth can be along with tightening The increasing of moment and produce enough anti-rotation resistances away from the generation effectively preventing transfer phenomenon；After lower breechblock 2 screws, then will Upper breechblock 1 is installed on bolt and threadingly precession, when upper breechblock 1 is against time to lower breechblock 2, and arc bump 22 is fastened on phase In corresponding spacing arcuate groove 12, now go up breechblock 1 when tightening, breechblock 2 down can be driven again to revolve by arc bump 22 simultaneously Tightly, thus ensure lower breechblock 2 antiturning pitch 211 can deeper into the inside being embedded in parts end face, improve the locking effect of this nut Really, and having shrinkage pool when part of appliance, when screw rod is inserted in shrinkage pool, lower breechblock 2 is threaded at shrinkage pool along screw rod cannot When further making lower breechblock 2 screw with hands or instrument, lower breechblock 2 can be driven to continue inwardly to screw by screwing upper breechblock 1, from And make what this nut can consolidate to be installed on screw rod.

Simultaneously because spacing arcuate groove 12 one end flushes bottom annular groove 11, the other end gradually caves inward, and arc Shape projection 22 one end and lower breechblock 2 end face, the other end gradually raises up, and is the most only tightened in screw rod at upper breechblock 1 Time upper, arc bump 22 just can be arranged in spacing arcuate groove 12, it is thus possible to drive lower breechblock 2 to continue to screw, and if when upper spiral shell When body 1 occurs loosening and the trend outwards screwed out occur in the case of high vibration, the arc bump 22 of lower breechblock 2 can be from upper spiral shell The spacing arcuate groove 12 of body 1 spins off, and does not so interfere with the coupling mechanism force of lower breechblock 2, lower breechblock 2 when upper breechblock 1 loosens Will not screw out along with loosening of upper breechblock 1；In like manner, breechblock 2 occurs loosening and outwards occurring in the case of high vibration instantly During the trend screwed out, the arc bump 22 of lower breechblock 2 can spin off from the spacing arcuate groove 12 of upper breechblock 1, and lower breechblock 2 is by upper The stop of breechblock 1 is without screwing out on screw rod.

Specific embodiment described herein is only to this utility model spirit explanation for example.This utility model institute Belong to those skilled in the art described specific embodiment to make various amendment or supplement or use similar Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.

Claims

1. a nut, it is characterised in that include breechblock and lower breechblock, upper breechblock and lower breechblock offer connect and With the screwed hole of internal diameter, the end face that lower breechblock deviates from breechblock extends radially outwardly and is formed with extension, in extension On outer face, outwardly convex is formed with some antiturning pitch, offers annular groove on upper breechblock, is provided with some in annular groove Being looped around the spacing arcuate groove of screwed hole surrounding, spacing arcuate groove one end flushes with bottom annular groove, and the other end is the most inside Depression, one end of lower breechblock is inserted in breechblock and lower breechblock faces up breechblock has some with spacing arcuate groove one_to_one corresponding The arc bump arranged, arc bump one end and lower breechblock end face, the other end gradually raises up, and upper breechblock relatively under During breechblock one-way movement, arc bump can be arranged in spacing arcuate groove.