CN210484359U - Inverted tooth type locknut - Google Patents

Abstract

The utility model discloses a pawl-type locknut, which comprises a tightening nut and a fastening nut; the tightening nut comprises a tightening nut body and a convex elastic block; the fastening nut comprises a fastening nut main body and concave inverted teeth; the tightening nut body is provided with a plurality of convex elastic blocks which are arranged at intervals towards the tightening nut body, and the tightening nut body is provided with concave inverted teeth towards the tightening nut body; the height of the convex elastic block is greater than the depth of the concave inverted tooth; the evagination elastic piece is arranged in the outside of reducing the nut main part, and this evagination elastic piece includes fixed column and shell fragment. The utility model discloses can solve and how can not rely on the brand-new locking nut that can carry out the auto-lock of frictional force between adoption nut and the bolt, solve the problem that reliability and life-span that ordinary locking nut auto-lock will reduce in the dynamic load.

Description

Inverted tooth type locknut

Technical Field

The utility model relates to a pawl type locknut, specific have to reduce nut and fastening nut and realize pawl type locknut of fastening effect together that says so.

Background

With the rapid development of society, the working strength of airplanes, high-speed rails, automobiles and other heavy industrial tools is higher and higher, so that the safety standard of the tools is increased, the nut is an unobtrusive but very important part, and the firmness of the nut is related to the life safety. Japanese Hardlock nuts work with two nuts, the second of which relies on eccentric pressure to lock the first nut for anti-loosening purposes. The problem is that when eccentric pressure is applied, the thread engagement of the nut and the bolt is necessarily deviated and changed, and the stress of the thread is not uniform. Meanwhile, the bolt is added with bending stress besides normal tensile stress when in use, which seriously affects the fatigue strength of the fastener, namely the capability of working for a long time under the alternating force, and inevitably reduces the fatigue life of the bolt. It is desirable that the problem of loosening the nut will no longer be overcome by friction to avoid the problem of reduced fatigue life of hardlock nuts. The design has no any contraindication on the process and precision requirements, the high, medium and low screw nuts can be produced, and the nuts cannot be damaged due to the characteristic that the nuts do not rely on friction force any more when being loosened.

The domestic self-tightening nut realizes the application of the self-tightening force theory by utilizing a spiral surface inosculation structure between the nut and the gasket, and completely achieves the anti-loosening effect by a specific lifting angle, so that the self-tightening nut can only be screwed but can not be loosened, and the self-tightening nut can only be realized by screwing the gasket when the nut needs to be loosened. But the nut itself is consumed by still relying on friction force when the nut is loosened, so that the nut cannot be repeatedly used for many times. When the conventional nut is used for pre-tightening the nut, the anti-loosening effect is achieved through friction force among all parts, and therefore abrasion of devices can be accompanied in the process of dismounting.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pawl type locknut solves how to not rely on the brand-new locking nut that adopts the frictional force between nut and the bolt can carry out the auto-lock, solves the problem that reliability and life-span of ordinary locking nut auto-lock will reduce in the dynamic load.

The inverted tooth type locknut comprises a tightening nut and a fastening nut; the tightening nut comprises a tightening nut body and a convex elastic block; the fastening nut comprises a fastening nut main body and concave inverted teeth; the tightening nut body is provided with a plurality of convex elastic blocks which are arranged at intervals towards the tightening nut body, and the tightening nut body is provided with concave inverted teeth towards the tightening nut body; the height of the convex elastic block is greater than the depth of the concave inverted tooth; the outer convex elastic block is arranged outside the tightening nut body and comprises a fixing column and an elastic sheet; the elastic sheet is integrally arc-shaped, one end of the elastic sheet is fixed on the fixing column, and a gap is formed between the bottom of the elastic sheet and the tightening nut body; the concave inverted teeth are arranged on the inner side surface of the fastening nut main body, and the elastic sheets are matched with the concave inverted teeth; the screw directions of the internal threads of the tightening nut and the fastening nut are arranged in opposite directions.

The elastic sheet is integrally arc-shaped.

The concave inverted teeth are provided with a plurality of ratchet teeth, and the depth of the ratchet teeth is 1.5 mm.

The convex elastic blocks are 4-6 and are uniformly arranged towards the pressing direction of the center of the nut.

The height of shell fragment is 3mm, and the interval between shell fragment and the nut main part that contracts is 0.5 mm.

The clearance between the tightening nut and the fastening nut is 1.5 mm.

The utility model has the advantages that:

1. through design evagination elastic block and indent pawl, when reducing nut and fastening nut to together, the shell fragment that reduces the nut just can block on fastening nut's pawl, can't loosen but can continue to tighten. So as to achieve the effect of looseness prevention. Wherein the thickness of shell fragment is higher than the degree of depth of pawl to when dismantling, can be absorbed in the gap between the nut with the iron wire, compress tightly the shell fragment, can loosen the nut.

2. On tightening the nut, the shell fragment is not with tightening the nut main part and directly link to each other, but connects on the fixed column, and every shell fragment can be to nut center direction pressure. The fastening nut is provided with a circle of inverted teeth, the inverted teeth and the elastic sheet form one-way occlusion, so that the two nuts can only rotate in one way when being aligned, the nuts are not loosened by friction force any more, the loss of the nuts during disassembly is reduced, the service life is prolonged, in addition, the process requirement and the precision requirement of production are reduced, and the cost is reduced, and the two nuts are conveniently separated.

Drawings

FIG. 1 is a schematic view of a fastening nut;

FIG. 2 is a schematic view of a compression nut;

FIG. 3 is a schematic view of the split state of the tightening nut and the reduction nut;

FIG. 4 is a schematic view of the other side of the split state of the tightening nut and the reduction nut;

FIG. 5 is a schematic view of the union of the tightening nut and the reduction nut;

in the figure, 1, 11, 12, a convex elastic block, 121, a fixed column, 122, an elastic sheet, 2, a fastening nut, 21, a fastening nut body, 22, a concave inverted tooth and 221, ratchets are arranged.

Detailed Description

Referring to fig. 1 to 5, the inverted tooth type locknut shown in the drawings includes a compression nut 1 and a fastening nut 2. The screw directions of the internal threads of the reduction nut 1 and the tightening nut 2 are arranged in opposite directions. The clearance between the tightening nut 1 and the tightening nut 2 is 1.5 mm.

The tightening nut 1 comprises a tightening nut body 11 and an outer convex elastic block 12, and the tightening nut body and the outer convex elastic block can be of an integrated structure or a split structure; the tightening nut body 11 is a structure of the existing nut, and the tightening nut body 11 is provided with the 4-6 convex elastic blocks 12 arranged at intervals towards the direction of the fastening nut body 21, and preferably 4 convex elastic blocks. The convex elastic block 12 is arranged outside the tightening nut body 11, and the convex elastic block 12 comprises a fixing column 121 and an elastic sheet 122 which is integrally arc-shaped; the fixing column 121 is fixed on the nut body 11 in a riveting or welding or other existing mode, the elastic sheet 122 can be fixed on the fixing column 121 in a welding or clamping or other existing mode, the elastic sheet 122 is integrally arc-shaped, and the bottom of the elastic sheet 122 and the nut body 11 are provided with a gap so that the swinging of the elastic sheet 122 is not influenced. The 4-6 convex elastic blocks 12 are uniformly arranged towards the pressing direction of the center of the nut, so that an iron wire can be conveniently inserted for subsequent use, and the two nuts can be conveniently separated. The height of the elastic sheet 122 is 3mm, and the distance between the elastic sheet 122 and the tightening nut body 11 is 0.5 mm. The spring plate 122 may be made of a single metal material or an alloy material as long as it meets the performance requirements. The tightening nut body 11 and the convex elastic block 12 can be formed by 3D printing of two different metal powders, for example, the convex elastic block 12 can be made of carbon spring steel, alloy spring steel and the like, and is determined according to the required performance; the reduction nut body 11 may be made of carbon steel, stainless steel, copper, or the like, depending on the desired properties.

The fastening nut 2 comprises a fastening nut main body 21 and concave inverted teeth 22; the fastening nut body 21 is provided with the concave inverted teeth 22 towards the direction of the tightening nut body 11; the height of the convex elastic block 12 is larger than the depth of the concave inverted tooth 22; the female inverted tooth 22 is arranged on the inner side surface of the fastening nut body 21, the female inverted tooth 22 is provided with a plurality of ratchet teeth 221, the depth of the ratchet teeth is 1.5mm, and the elastic sheets 122 are matched with the ratchet teeth 221 so as to form a meshing structure.

When the two nuts are connected, the two nuts are in different screwing directions, and when the nut connector is used, the fastening nut 2 is firstly pre-tightened, and then the tightening nut 1 is pre-tightened. Because the two nuts are screwed in different directions, any nut in the two nuts has the sign of looseness, and the other nut can play a role in restraining, so that the two nuts cannot be screwed. When the nut needs to be loosened, a certain gap is reserved between the two nuts because the height of the convex elastic block 12 is greater than the depth of the concave inverted tooth 22, so that the tightening nut can be screwed out only by using a thin steel wire to be embedded into the gap to tighten the elastic sheet 122 with elasticity of the tightening nut, and the two nuts are loosened.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the above description, in combination with the drawings in the embodiments of the present invention, clearly and completely describes the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the above detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Claims (6)

1. Inverted tooth type locknut, its characterized in that: comprises a tightening nut and a fastening nut; the tightening nut comprises a tightening nut body and a convex elastic block; the fastening nut comprises a fastening nut main body and concave inverted teeth; the tightening nut body is provided with a plurality of convex elastic blocks which are arranged at intervals towards the tightening nut body, and the tightening nut body is provided with concave inverted teeth towards the tightening nut body; the height of the convex elastic block is greater than the depth of the concave inverted tooth; the outer convex elastic block is arranged outside the tightening nut body and comprises a fixing column and an elastic sheet; the elastic sheet is integrally arc-shaped, one end of the elastic sheet is fixed on the fixing column, and a gap is formed between the bottom of the elastic sheet and the tightening nut body; the concave inverted teeth are arranged on the inner side surface of the fastening nut main body, and the elastic sheets are matched with the concave inverted teeth; the screw directions of the internal threads of the tightening nut and the fastening nut are arranged in opposite directions.

2. The inverted-tooth-type locknut as claimed in claim 1, wherein: the elastic sheet is integrally arc-shaped.

3. The inverted-tooth-type locknut as claimed in claim 1, wherein: the concave inverted teeth are provided with a plurality of ratchet teeth, and the depth of the ratchet teeth is 1.5 mm.

4. The inverted-tooth-type locknut as claimed in claim 1, wherein: the convex elastic blocks are 4-6 and are uniformly arranged towards the pressing direction of the center of the nut.

5. The inverted-tooth-type locknut as claimed in claim 1, wherein: the height of shell fragment is 3mm, and the interval between shell fragment and the nut main part that contracts is 0.5 mm.

6. The inverted-tooth-type locknut as claimed in claim 1, wherein: the clearance between the tightening nut and the fastening nut is 1.5 mm.

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