CN2130952Y

CN2130952Y - Nylon ring self-locking bolt with preventing shock and looseness features

Info

Publication number: CN2130952Y
Application number: CN 91217605
Authority: CN
Inventors: 陈立洋
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-01
Filing date: 1991-07-01
Publication date: 1993-04-28
Anticipated expiration: 2001-07-01

Abstract

The utility model relates to a nylon-ring self-locking screw bolt with preventing shock and looseness function, belonging to the field of the machinery, and the self-locking screw bolt comprises a guiding screw thread (1), a ring groove (2), an effective screw thread (3) and a nylon ring (4) which are arranged at a common screw bolt. The nylon ring (4) is assembled in the ring groove (2), the screw bolt is screwed into an inner screw thread and is engaged with the inner screw thread through the guiding screw thread (1), and the nylon ring (4) can lead into the inner screw thread and can be pressed into the screw thread. Because the dimension of the nylon ring (4) is greater than the dimension of the inner diameter of the inner screw thread, the nylon ring (4) and the inner screw thread can have the interference fit after the nylon ring (4) is pressed and can have the self-locking function. The screw bolt has simple and reasonable technology structure and wide universality, can be used for the screw bolt with different standards, and can be used widely on the traffic, the aerospace, the mining machinery and other machinery devices with larger shock.

Description

Nylon ring self-locking bolt with preventing shock and looseness features

It belongs to mechanical.

The utility model relates to fastening piece, and it is the shockproof anti-loosening device of bolt in the fastening piece.

Plain bolt uses in various mechanical components; special vehicle in transport facility; boats and ships, aircraft are in the way of travelling; in mine, the building machinery operation; often run into because of mechanical facility under sharp pounding; cause in the mechanical component that fastening piece is loosening or come off, and cause unnecessary shutdown, parking, even fatal crass's serious accident can take place.

In order to address these problems common way is to increase the fastening piece locking device.And tradition locking is made up of plain bolt and spring washer, produces tired the mistake when the long-term pressurized of spring gas ket and decreases, and hinders and loses elasticity, so can not have locking effect.At present another locking device it to be confined to be nut, if when bolt will directly be screwed into internal thread in the body, locking nut just can't be brought into play its effect, so versatility is wideless yet.

The utility model purpose to provide a kind of can be under the sharp pounding condition, bolt is loosening, has shockproof anti-loosening function bolt locking device, guarantees mechanical facility, transport facility safe operation, running.This device can be suitable for all size bolt.

The utility model purpose is such realization: open an annular groove in the plain bolt front portion, one of assembling is made nylon ring with engineering plastics in annular groove again.Nylon ring can be processed afterwards earlier and assemble, and can also bolt be inserts molding and forming in mould, and the bolt after assembling is screwed in the internal thread, because the nylon ring outside dimension greater than the minor diameter of internal thread size, must be forced to be screwed into, because twisting force, nylon ring is squeezed into screw thread, produce frictional heat with internal thread, after cooling down gradually, become interference fit with internal thread, play the auto lock effect, when bolt is counter back-out after, nylon ring restores to the original state again, can circulate once more to be screwed into.

The utility model advantage is that process structure is simple, easy disassembly, repeatedly dismounting is used, and no loose mail is with low cost, versatility is wide, shockproof fastening performance is strong, can effectively reduce the maintenance expense, is widely used in communications and transportation, Aero-Space, mine construction machinery and shaking on the machinery of working under the strong condition.

Concrete structure of the present utility model is provided by following examples and accompanying drawing.

Fig. 1 is a section of structure, and Fig. 2 is that figure is cutd open in the nylon ring cross section, describes in detail below in conjunction with accompanying drawing, the utility model proposes concrete locking function and working condition.

This bolt is made up of guide thread (1), annular groove (2), effective thread (3), nylon ring (4).Guide thread (1), annular groove (2), effective thread (3) are an integral body, and its pitch and major diameter of thread equidimension require consistent, and require to keep with one heart, and at annular groove (2) setting-in nylon ring (4), bolt is that metallic material is made.Nylon ring (4) can be processed afterwards earlier and assemble, and can also do inserts molding and forming in mould by bolt.Nylon ring (4) is made with engineering plastics.Material selection nylon MC, nylon 6, nylon 66 are the best with nylon 66.More than each spot size magnitude relationship to everything goes well with your work and the coupling mechanism force size, concrete size is as follows: guide thread (1) length is 3-5 times of thread pitch, annular groove (2) width is 2-3 a times of thread pitch, nylon ring (4) outside dimension is the effective diameter of thread size, can be with effective diameter of thread size 0.1 pitch that adds deduct, the ring height is 2-3 a times of pitch, and ring wall is thick to be the about 2-4 of pitch times.Nylon ring (4) should match by same annular groove (2).

When being screwed into internal thread after the bolts assemblies, be screwed into by guide thread (1) earlier, guide thread (1) play the guiding role after meshing with internal thread, when continuing to be screwed into, nylon ring (4) contact internal thread, because nylon ring (4) outside dimension is a footpath size in the internal thread,, need to force to be screwed into greater than the minor diameter of internal thread size, because under twisting force, nylon ring (4) is squeezed into screw thread, has satisfied process conditions after continue to be screwed into again, effective thread (3) is screwed into internal thread, nylon ring (4) produces frictional heat with internal thread, after cooling down gradually later on, produce interference fit, played the auto lock effect with internal thread.

Claims

1, the shockproof anti-loosening self-locking screw of nylon ring it form by guide thread (1) annular groove (2) effective thread (3) and nylon ring (4), it is characterized in that guide thread (1) annular groove (2) effective thread (3) is an integral body, its pitch and major diameter of thread equidimension require consistent, and require to keep with one heart, at annular groove (2) setting-in nylon ring (4), nylon ring (4) adopts engineering plastics to make, and bolt is that metallic material is made.

2, according to right 1 described bolt, it is characterized in that guide thread (1) length is 3-5 times of pitch, annular groove (2) width is 2-3 a times of pitch.

3, bolt according to claim 1, the outside dimension that it is characterized in that nylon ring (4) is the effective diameter of thread size.Can be with effective diameter of thread size 0.1 pitch that adds deduct, ring height be pitch 2-3 times, ring wall is thick to be pitch 2-4 times.

4,, it is characterized in that nylon ring (4) material adopts nylon 66 for best according to the described bolt of claim 1.