CN2126344U

CN2126344U - Shockproof anti-releasing screw fastener

Info

Publication number: CN2126344U
Application number: CN 92201132
Authority: CN
Inventors: 吴光生
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-01-18
Filing date: 1992-01-18
Publication date: 1992-12-30

Abstract

The utility model relates to a shockproof anti-releasing thread fastener which is widely used. The auxiliary thread of a rabbet is connected with tow nuts; the leads of the main and the auxiliary threads are not equal; in addition, a key is pressed between the two nuts; another modifying form is that two threads of an outer nut are divided into two parts; a rabbet is an inverse-tooth thread. The tendency of back-loosing between nuts is mutually inhibited and resisted, so the screw fastener is very firm without releasing. The utility model is very suitable for places which have high requirements to safety performance.

Description

Shockproof anti-releasing screw fastener

The present invention relates to use the improvement of extremely wide threaded fastener.

The anti-releasing of threaded fastener, people have found out many methods, 90,90206495, No. 9 monographs of 10,31 bulletins method that is novelties, yet also there is blemish in an otherwise perfect thing: 1, because tenon screw thread and working thread decentraction, two nuts in conjunction with after, aim at the center of two screw threads two nuts are all gone up not a duck soup in the screw rod, sometimes in addition can't on enter; 2, two nuts screw on screw rod or screw out, and keep synchronously, otherwise easily block because of deflection; 3, be in after the locking under the long-time vibrations, outer nut still might become flexible gradually.

Task of the present invention is in order to overcome the deficiency of prior art, the threaded fastener of a kind of shatter-proof anti-pine to be provided.

Task of the present invention be achieved in that use concentric and connect two nuts with the main thread of working with the tenon deputy thread of rotation direction, unequal (can greatly or less than) of the helical pitch of deputy thread and main thread, with the bull fine thread for well, in screwing behind the nut, suitable derotation outer nut, because the helical pitch of major and minor screw thread is poor, make the axial force that produces opposite sign but equal magnitude on the outer nut between these two kinds of screw threads, the major and minor screw thread of outer nut is paid all makes a tight group, gap between the nut of innner and outer is pressed into key then, stops the Hui Song of two nuts.

The innner and outer nut that causes by vibrations to return the pine trend be to be at loggerheads mutually, as long as key does not get loose, double nut can not unclamp, so shatter-proof anti-loose superior performance of this threaded fastener, simple and practical, safe and reliable, every impact is big, vibrations are strong and Safety performance requires high occasion all very suitable.

The working thread of above-mentioned double nut all is a standard thread, its profile side of can be, hexagonal, garden or abnormity.

Further specify below in conjunction with embodiment and accompanying drawing.

Fig. 1 is the fastening erection drawing of double nut of the present invention,

Fig. 2 is the A-A sectional view of Fig. 1,

Fig. 3 is the fastening erection drawings of three nuts (a kind of modification),

Fig. 4 is a schematic representation of using a kind of loose joint screw of the present invention (bolt) head.

Among the figure: the 1-screw rod; The 2-main thread; The 3-outer nut; The 4-tenon; The 5-deputy thread; 6 spring rings; The 7-key; The 8-Cleat; Nut in the 9-; The 10-packing ring; The fastened object of 11-; The 12-lock nut; The anti-tooth deputy thread of the anti-tooth nut of 13-14-

Nut 9 among Fig. 1 has a tenon 4 with bull closely-pitched deputy thread 5, nut 3 has an internal thread that matches with tenon 4, this deputy thread and main thread 2 concentric and same rotation directions, being pressed into 1～2 key 7(between nut 9 and nut 3 does not deviate from as only requiring nut, can be without key), key and fixation method thereof have: a with 1～2 key 7 that has split circlip 6, prevents that key from deviating from; B not with 1～2 key of spring ring, passes the aperture of Cleat 8 with iron wire, fastens around nut; C uses the spring washer with rotation direction to give elder generation's pad between two nuts.

During use, earlier two nuts are screwed, screw in simultaneously in the screw rod 1 again (with the lining, outer nut turn around with also can), after tightening, suitably nut 9 is motionless in the derotation outer nut 3(), at this moment the main thread 2 of outer nut 3 is formed differential thread with deputy thread 5, because the helical pitch of major-minor screw thread is poor, along with derotation, the master of outer nut 3, deputy thread is paid and is all stung more and more tightly (because differential thread is laborsaving, firmly not excessive, otherwise easily debentition, the most handy torque-indicating wrencg or shorten the application of force arm of force to spanner), and that the pine of differential thread transfers toward gesture is less, just can prevent the Hui Song of fastening piece more effectively, but for perfectly sound, gap between nut 3 and nut 9 is pressed into key 7 again, and it is impossible that the Hui Song of double nut is become.

Cause that by vibrations the Hui Song of nut 9 turns to and be (by friction) to make nut 3 that the direction of derotations take place, and its derotation only can make differential thread pay to sting tightlyer, and stop the pine of derotation direction to change; It is that (by friction) makes nut 9 produce the direction that screws that the Hui Song of nut 3 turns to, the result who conditions each other like this, is at loggerheads mutually, and making fastening piece that pine very can not taken place reliably changes.

In the time of need dismantling, as long as transfer to key 7, suitably positive spin nut 3, double nut screws out simultaneously then.

For convenient manufacturing and use, the major and minor screw thread of nut 3 partly is split up into two, a kind of new modification just appears, be shown in Fig. 3, the tenon 4 that one anti-tooth outside thread 14 is arranged at an end of mother nut 9, with the bull fine thread for well, and be furnished with the nut 13(profile side of can be, hexagonal or the garden shape that match with it), the thickness of nut 13 is greater than the length of tenon 4, in the outside of nut 13 again with the lock nut 12(profile side of can be, hexagonal or a garden shape that matches with main thread 2) locked (cancellation key).Because of there being anti-pitch thread, just form the situation of controlling mutually, can prevent the Hui Song of fastening piece equally effectively.

If above-mentioned two kinds of structures are transplanted screw (bolt) head in a kind of loose joint, just can obtain the screw (bolt) of a kind of shatter-proof anti-pine of union, its head end can be light tack, trough of belt (or cross recess, garden column cap, the flat knob of trough of belt, trough of belt half knob or hexagon socket head down together), all there is standard external at the two ends of its screw rod, at the head one end nut of the side of having, hexagonal, garden or abnormity also; The feature of its two kinds of structures is identical with the structure characteristic of above-mentioned two kinds of nuts.Its organigram of using loose joint screw (bolt) head of first kind of structure is seen Fig. 4.

Claims

1, a kind of threaded fastener of shatter-proof anti-releasing, its side of being, hexagonal, garden or double nut abnormity and that have the standard operation screw thread; And a kind of screw of union (bolt), its head end can be a light tack, trough of belt (or cross recess, down with) garden column cap, the flat knob of trough of belt, trough of belt half knob or hexagon socket head, all there is standard external at the two ends of its screw rod, at the head one end double nut of the side of having, hexagonal, garden or abnormity also; It is characterized in that: use concentric and connect the helical pitch of two nuts, major and minor screw thread unequal (can greatly or less than) with the main thread of working with the tenon deputy thread of rotation direction, with the bull fine thread for well; Between the nut of innner and outer, be pressed into key (as only require that nut do not deviate from, can without key).

2, by the described threaded fastener of claim 1, it is characterized in that key and fixation method thereof have: a, with 1～2 key that has split circlip; B, 1～2 with the key of spring ring, and the aperture that passes Cleat with iron wire is around nut and fasten; C uses the spring washer with rotation direction to give elder generation's pad between two nuts.

3, a kind of threaded fastener of shatter-proof anti-releasing, its side of being, hexagonal, garden or nut abnormity and that have the standard operation screw thread; And a kind of screw of union (bolt), its head end can be light tack, trough of belt (or cross recess, garden column cap, the flat knob of trough of belt, trough of belt half knob or hexagon socket head down together), all there is standard external at the two ends of its screw rod, at the head one end nut of the side of having, hexagonal, garden or abnormity also; It is characterized in that: the end at mother nut has the externally threaded tenon of an anti-tooth, with the bull fine thread for well, and be furnished with the nut that matches with it, the thickness of nut is greater than the length of tenon, and the outside of this nut is locked with a lock nut that matches with main thread again.