CN111981021A

CN111981021A - Nut capable of preventing loosening

Info

Publication number: CN111981021A
Application number: CN202010994314.3A
Authority: CN
Inventors: 王平安
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2020-11-24

Abstract

The invention discloses a nut for preventing loosening and disassembling, which comprises a first nut and a second nut, wherein bolts are connected with the inner side wall threads of the first nut and the second nut, central lines are arranged on the first nut, the second nut and the bolts, the central lines are mutually overlapped, a first thread is arranged on the outer surface of the first nut, a second thread is arranged on the outer surface of the second nut, a concave taper surface is arranged on the front end surface of the second nut, taper threads are processed on the concave taper surface, a convex taper surface is arranged on the rear end surface of the first nut, an H groove is processed on the convex taper surface of the nut for preventing loosening and disassembling, when the second nut is screwed, the convex taper surface shrinks towards the center to clamp the bolts, meanwhile, the taper threads of the concave taper surface of the second nut are deformed by reaction force, friction force is increased, bolt threads different from the concave taper threads and the convex taper threads, when the second nut is screwed, the mutual pulling force or the pushing force generated between the two nuts is suitable for being widely popularized and used.

Description

Nut capable of preventing loosening

Technical Field

The invention relates to the technical field of fasteners, in particular to a nut capable of preventing loosening.

Background

The nut is a nut, and is screwed together with a bolt or a screw rod to play a role in fastening, and one element which is necessary for all production and manufacturing machines is divided into carbon steel, stainless steel, non-ferrous metal (such as copper) and other types according to different materials.

Patent application publication No. CN201821249384.0 discloses a deformation type locknut assembly, which belongs to a fastener. The nut comprises a female nut (1) with an end face provided with an inverted cone-shaped counter bore (2) and a male nut (3) with an end face provided with an inverted cone-shaped platform body (4); the surface of the inverted cone-shaped counter bore (2) is of an inner elliptic cone structure, and the thread of the female nut (1) is coaxial with the axis of the inverted cone-shaped counter bore; the inverted cone-shaped body (4) is of an inverted elliptical cone structure, and the thread of the male nut (3) is coaxial with the axis of the inverted cone-shaped body. The invention not only improves the locking force of the male screw and the female screw on the bolt and prevents the thread from loosening, but also can avoid shearing the bolt and prolong the service life of the bolt, and can also overcome the defects of uneven stress of the nut component, large thread clearance and the like; is a nonstandard locknut component.

The above patent has the following problems: in actual use, the supporting surface is found to be loosened, and because the first nut and the second nut are provided with mutual rotation prevention and do not have mutual pulling force or pushing force, when the supporting surface is loosened, the first nut moves downwards to form a gap between the bolt and the nut, so that the friction force of the two nuts is reduced.

Disclosure of Invention

The invention aims to overcome the technical problem of the prior art and provide a nut for preventing loosening, wherein an H groove is processed on a convex taper surface, when a second nut is screwed, the convex taper surface contracts towards the center to clamp a bolt, simultaneously, a taper thread of a concave taper surface of the second nut deforms under the action of reaction force, the friction force is increased, bolt threads different from the concave taper thread and the convex taper thread are different, and when the second nut is screwed, the mutual pulling force or pushing force generated between the two nuts can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a nut that prevention pine was unloaded, includes first nut and second nut, first nut and second nut inside wall threaded connection have the bolt, all seted up the central line on first nut, second nut and the bolt, the central line coincides each other, No. one screw thread has been seted up to first nut surface, No. two screw threads have been seted up to second nut surface, the terminal surface is equipped with concave tapering face before the second nut, processing has the tapering screw thread on the concave tapering face, first nut rear end face is equipped with protruding tapering face, processing has tapering screw thread and H groove on the protruding tapering face.

As a preferable technical solution of the present invention, equal thread pitches are provided between the first thread, the second thread and the thread on the bolt.

As a preferable technical scheme of the invention, the taper thread of the convex taper surface is matched with the taper thread of the concave taper surface.

As a preferable technical solution of the present invention, the first nut has a mark a on an outer surface thereof, and the second nut has a mark B on an outer surface thereof.

Compared with the prior art, the invention has the beneficial effects that: the first nut and the second nut are assembled in a matched mode through taper threads, the position where the convex taper surface begins to shrink is also marked that A is aligned with B, the first nut and the second nut are assembled on the bolt at the same time, the first nut and the second nut are simultaneously screwed together, and because the convex taper surface is provided with the H groove, when the second nut is screwed up, the convex taper surface shrinks towards the center to clamp the bolt, meanwhile, the taper threads of the concave taper surface of the second nut deform due to reaction force, friction force is increased, the bolt threads are different from the concave taper threads and the convex taper threads, and when the second nut is screwed up, the mutual pulling force or the pushing force generated between the two nuts is increased, and the friction force is increased. Because the convex taper surface shrinks towards the center to clamp the bolt, the taper thread of the concave taper surface of the second nut deforms by the reaction force, and the two nuts generate mutual pulling force or pushing force, the friction force of the first nut and the second nut is increased to achieve the effect of higher anti-loosening and self-locking. The second thread of the second nut can be a thread through hole of the bolt, and the first nut and the second nut are stressed and deformed to prevent looseness.

Drawings

FIG. 1 is a schematic view of the overall assembly structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

fig. 3 is a schematic top view of the first nut of the present invention.

In the figure: 1. a first nut; 2. a second nut; 3. a bolt; 4. a second thread; 5. a concave taper surface; 6. a convex taper surface; 7. a first thread; 8. marking A; 9. a marker B; 10. a centerline.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a nut that prevention pine was unloaded, includes first nut 1 and second nut 2, the threaded connection of

first nut

1 and 2 inside walls of second nut has bolt 3, all seted up central line 10 on first nut 1, second nut 2 and the bolt 3, central line 10 coincidence each other, No. one screw thread 7 has been seted up to first nut 1 surface, No. two screw threads 4 have been seted up to second nut 2 surface, 2 preceding terminal surfaces of second nut are equipped with concave tapering surface 5, processing has the tapering screw thread on the concave tapering surface 5, 1 rear end face of first nut is equipped with protruding tapering surface 6, processing has tapering screw thread and H groove on the protruding tapering surface 6.

In this embodiment, as shown in fig. 1 to 3, the first nut 1 and the second nut 2 are assembled by matching the taper threads of the first nut 1 and the second nut 2, the position where the convex taper surface 6 starts to contract is also marked as a mark A8 and is aligned with a mark B9, the first nut 1 and the second nut 2 are assembled on the bolt 3 at the same time, the first nut 1 and the second nut 2 are simultaneously screwed together, because the convex taper surface 6 is provided with an H-shaped groove, when the second nut 2 is screwed, the convex taper surface 6 contracts toward the center to clamp the bolt 3, and simultaneously the taper thread of the concave taper surface 5 of the second nut 2 is deformed by a reaction force, so that a friction force is increased, and the bolt thread is different from the concave taper thread, and when the second nut 1 is screwed, a mutual pulling force or a pushing force is generated between the two nuts 2, so that the friction force is increased. Because the tapered threads of the clamping bolt 3 and the concave tapered surface 5 of the second nut 2 are deformed by the reaction force and the mutual pulling force or pushing force is generated between the two nuts due to the fact that the convex tapered surface 6 contracts towards the center, the friction force of the first nut 1 and the second nut 2 is increased to achieve the effect of higher anti-loosening and self-locking. The second thread 4 of the second nut 2 can be a thread through hole of the bolt 3, and the first nut 1 and the second nut 2 are prevented from loosening by mutual stress deformation of the taper threads.

And equal thread pitches are arranged between the first thread 7 and the second thread 4 and the threads on the bolt 3.

In the embodiment, as shown in fig. 1-2, the first thread 7, the second thread 4 and the thread on the bolt 3 have the same pitch, so that the threads are screwed and fixed.

Wherein the taper thread of the convex taper surface 6 is matched with the taper thread of the concave taper surface 5.

In this embodiment, as shown in fig. 2, the tapered threads of the clamping bolt 3 and the concave tapered surface 5 of the second nut 2 are deformed by the reaction force and the mutual pulling force or pushing force is generated between the two nuts due to the fact that the convex tapered surface 6 contracts towards the center, so that the friction force of the first nut 1 and the second nut 2 is increased to achieve the effect of higher anti-loosening and self-locking.

The outer surface of the first nut 1 is provided with a mark A8, and the outer surface of the second nut 2 is provided with a mark B9.

In this embodiment, as shown in fig. 1, the taper threads of the first nut 1 and the second nut 2 are engaged with each other until the taper surface 6 starts to contract, and the mark A8 is aligned with the mark B9.

When in use: firstly, first nut 1, the tapering screw-thread fit of second nut 2 is installed, it is alignment with mark B9 also to adorn the position that protruding taper face 6 begins the shrink to be mark A8, first nut 1, bolt 3 is adorned simultaneously to second nut 2, together first nut 1, second nut 2 is screwed up simultaneously, again because processing has the H groove on the protruding taper face 6, when screwing up second nut 2 again, protruding taper face 6 contracts towards the center and presss from both sides bolt 3, the tapering screw thread of second nut 2 concave taper face 5 receives reaction force and warp simultaneously, increase frictional force, with the different bolt screw thread of unsmooth tapering screw thread, when screwing up second nut 1, the mutual pulling force or the thrust that produce between two nuts 2, increase frictional force. Because the tapered threads of the clamping bolt 3 and the concave tapered surface 5 of the second nut 2 are deformed by the reaction force and the mutual pulling force or pushing force is generated between the two nuts due to the fact that the convex tapered surface 6 contracts towards the center, the friction force of the first nut 1 and the second nut 2 is increased to achieve the effect of higher anti-loosening and self-locking. The second thread 4 of the second nut 2 can be a thread through hole of the bolt 3, and the looseness prevention is realized by mutual stress deformation of the taper threads of the first nut 1 and the second nut 2; in addition, the nut has various types, and the taper thread of the taper surface of the first nut 1 and the taper thread of the taper surface of the second nut 2 are larger than the thread pitch of the first nut 1 and the second nut 2; the taper thread of the taper surface of the first nut 1 and the taper thread of the taper surface of the second nut 2 are smaller than the thread pitch of the first nut 1 and the second nut 2; the taper thread of the taper surface of the first nut 1 is equal to the taper thread of the taper surface of the second nut 2 in thread pitch of the first nut 1 and the second nut 2; the inner surfaces of the first nut 1 and the second nut 2 are provided with H grooves which are one groove or a plurality of grooves.

A first nut 1 of the present invention; a second nut 2; a bolt 3; thread number two 4; a concave tapered surface 5; a convex taper surface 6; a first thread 7; label A8; marker B9; the centerline 10 components are all standard or known to those skilled in the art, and their construction and principle are known to those skilled in the art through technical manuals or through routine experimentation.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. The utility model provides a nut that prevention pine was unloaded, includes first nut (1) and second nut (2), its characterized in that: first nut (1) and second nut (2) inside wall threaded connection have bolt (3), central line (10) have all been seted up on first nut (1), second nut (2) and bolt (3), central line (10) coincide each other, No. one screw thread (7) have been seted up to first nut (1) surface, No. two screw thread (4) have been seted up to second nut (2) surface, the terminal surface is equipped with concave tapering face (5) before second nut (2), processing has the tapering screw thread on concave tapering face (5), first nut (1) rear end face is equipped with protruding tapering face (6), processing has tapering screw thread and H groove on protruding tapering face (6).

2. A jam nut as set forth in claim 1 wherein: equal thread pitches are arranged between the first thread (7), the second thread (4) and the threads on the bolt (3).

3. A jam nut as set forth in claim 1 wherein: the taper thread of the convex taper surface (6) is matched with the taper thread of the concave taper surface (5).

4. A jam nut as set forth in claim 1 wherein: the outer surface of the first nut (1) is provided with a mark A (8), and the outer surface of the second nut (2) is provided with a mark B (9).