CN211370960U

CN211370960U - Anti-loosening combined nut

Info

Publication number: CN211370960U
Application number: CN201922287180.7U
Authority: CN
Inventors: 张大川
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-08-28
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses an anti-loose combined nut, which comprises an inner nut and an outer nut, wherein the inner nut is sleeved at one end of a screw rod, the outer nut is sleeved on the screw rod and positioned outside the inner nut, and at least one end surface of the inner nut and the outer nut is provided with a groove or a bulge which are matched with each other; when the protrusion is arranged in the groove, the adjacent end surfaces of the inner nut and the outer nut are attached, and the screw thread is fixed on the screw rod in a rotating mode, the inner nut is fixed, the outer nut rotates in the reverse direction for a certain angle to enable the protrusion to extend out of the groove, the outer nut is pushed open in an inclined mode, axial jacking force and radial torsion force are generated, and the inner nut and the outer nut are locked on the screw rod in a threaded mode and fixed. Compared with the prior art, the utility model provides a combination nut that locking takes off makes two nuts lock each other through axial force and radial torsion between two nuts, and difficult pine takes off, and locking state is firm reliable, has improved the quality and the reliability of product.

Description

Anti-loosening combined nut

Technical Field

The invention relates to the technical field of nuts, in particular to an anti-loosening combined nut.

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.

In the prior art, when the nut is used, the nut is usually fixed on a screw rod at one end of the locked part by using the nut to lock and fasten the locked part, and the nut structure is easy to loosen or loosen due to vibration and the like after long-term use, so that the quality and reliability of a product are affected, and therefore, further improvement is needed.

Disclosure of Invention

The invention provides an anti-loosening combined nut, aiming at solving the problems in the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows:

an anti-loosening combined nut comprises an inner nut and an outer nut, wherein the inner nut is sleeved at one end of a screw, the outer nut is sleeved on the screw and positioned on the outer side of the inner nut, and at least one end face of the inner nut and at least one end face of the outer nut are provided with grooves or bulges which are matched with each other; when the protrusion is arranged in the groove, the adjacent end surfaces of the inner nut and the outer nut are attached, and the screw thread is fixed on the screw rod in a rotating mode, the inner nut is fixed, the outer nut rotates in the reverse direction for a certain angle to enable the protrusion to extend out of the groove, the outer nut is pushed open in an inclined mode, axial jacking force and radial torsion force are generated, and the inner nut and the outer nut are locked on the screw rod in a threaded mode and fixed.

When the edges of the inner nut and the outer nut are aligned, the adjacent end faces are attached, and the protrusions are arranged in the grooves, the inner nut and the outer nut are integrally tapped to form inner threads.

The protrusion is an inclined surface, and the height of the inclined surface is gradually reduced to zero towards the anticlockwise rotation direction of the outer nut.

The slope of the inclined plane is larger than the slope of the internal threads on the internal nut and the external nut.

The height of the inclined plane is greater than the thread pitch of the internal threads on the internal nut and the external nut.

The protrusion and the groove are of arc structures, and the length of the protrusion is smaller than that of the groove.

When the protrusion is arranged in the groove, the edges of the inner nut and the outer nut are aligned, and when the outer nut rotates anticlockwise to enable the protrusion to extend out of the groove, the edges of the inner nut and the outer nut are just aligned.

The screw rod is characterized by further comprising a sleeve, when the outer nut rotates anticlockwise to enable the protrusion to extend out of the groove, edges of the inner nut and the outer nut are just aligned, and the sleeve is sleeved on the outer sides of the inner nut and the outer nut to connect the inner nut and the outer nut into a whole and lock and fix the inner nut and the outer nut on the screw rod.

The inner wall of the sleeve is provided with a convex block or a clamping groove, the inner nut and/or the outer nut are/is provided with a groove or a convex block which is matched and clamped with the convex block or the clamping groove, and the sleeve is fixed on the inner nut and the outer nut through the convex block arranged in the groove.

The telescopic top be equipped with inside intercommunication the opening, the diameter of opening is greater than with the external diameter of interior nut and outer nut complex screw rod to be less than interior nut and outer nut's external diameter, telescopic hole degree of depth slightly is less than interior nut and outer nut's high sum.

The invention has the beneficial effects that:

compared with the prior art, the anti-loosening combined nut provided by the invention has the advantages that the two nuts are mutually locked through the axial force and the radial torsion between the two nuts, the loosening is not easy to occur, the locking state is firm and reliable, and the quality and the reliability of a product are improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural view of an inner nut of the present invention.

Fig. 2 is a schematic structural view of the outer nut of the present invention.

Fig. 3 is a schematic structural view of the fit locking of the inner nut and the outer nut of the invention.

Fig. 4 is a schematic structural view of the sleeve of the present invention fitted over the inner nut and the outer nut.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It should be noted that, for the convenience of description, only a part of the structure related to the present invention is shown in the drawings, not the whole structure.

As shown in fig. 1-3, in an embodiment of the present invention, a combined nut for preventing loosening is provided, which includes an inner nut 1 for being fitted over one end of a screw, an outer nut 3 for being fitted over the screw and located outside the inner nut 1, and grooves 2 or protrusions 4 for fitting with each other are provided on at least one end surfaces of the inner nut 1 and the outer nut 3; when the protrusion 4 is arranged in the groove 2 and the adjacent end surfaces of the inner nut 3 and the outer nut 3 are fitted and simultaneously the screw threads are screwed in and fixed on the screw rod, the inner nut 1 is fixed, and the outer nut 3 rotates reversely for a certain angle so that the protrusion 4 extends out of the groove 2, the outer nut is obliquely jacked open and generates axial jacking force and radial torsion to lock the inner nut 1 and the outer nut 3 on the screw rod simultaneously and fix the screw threads. The two nuts are mutually locked through the axial jacking force (with certain eccentric force) and the radial torsion force between the two nuts, the two nuts are not easy to loosen, the locking state is firm and reliable, and the quality and the reliability of products are improved.

Specifically, when the edges of the inner nut 1 and the outer nut 3 are aligned and the adjacent end surfaces are fitted and the protrusions 4 are placed in the grooves 2, the inner nut 1 and the outer nut 3 are integrally tapped to form the inner threads thereof. The dislocation phenomenon can be prevented when the two nuts are simultaneously screwed into the screw.

Specifically, the protrusion 4 is an inclined surface, and the height of the inclined surface gradually decreases to zero towards the counterclockwise direction of the outer nut 3. Over-smoothing, the protrusion 4 can be easily rotated out of the groove 2.

Specifically, the slope of the inclined plane is greater than the slope of the internal threads on the internal nut 1 and the external nut 3.

Specifically, the height of the inclined plane is greater than the thread pitch of the internal threads on the internal nut 1 and the external nut 3. The phenomenon that the locking state is not firm enough due to insufficient axial jacking force and radial torsion of the bulge 2 after the bulge 4 extends out of the groove 2 can be prevented from occurring.

Preferably, the protrusion 4 and the groove 2 are arc-shaped structures and the length of the protrusion 4 is smaller than the length of the groove 2.

Preferably, when the protrusions 4 are placed in the grooves 2, the edges of the inner nut 1 and the outer nut 3 are aligned, and when the outer nut 3 is rotated counterclockwise such that the protrusions 4 protrude out of the grooves 2, the edges of the inner nut 1 and the outer nut 3 are exactly aligned. At this time, the rotation angle of the outer nut 3 is 60 degrees.

As shown in fig. 4, further, a sleeve 6 is included, and when the outer nut 3 is rotated counterclockwise so that the protrusions 4 protrude out of the grooves 2 and the edges of the inner nut 1 and the outer nut 3 are exactly aligned, the sleeve 6 is fitted over the outer sides of the inner nut 1 and the outer nut 3 to integrate and lockingly fix the inner nut 1 and the outer nut 3 to the screw.

Preferably, the inner nut 1 and the outer nut 3 are hexagonal nuts, and the sleeve 6 is an inner hexagonal sleeve.

Preferably, the top end of the sleeve 6 is provided with an opening 61 communicating with the inside, and the diameter of the opening 61 is larger than the outer diameter of the screw engaged with the inner nut 1 and the outer nut 3 and smaller than the outer diameter of the inner nut 1 and the outer nut 3. When the screw rod is long, one end of the screw rod can extend out from the opening 61 of the sleeve 6, so that the sleeve 6 can be effectively sleeved on the inner nut 1 and the outer nut 3 to connect the inner nut 1 and the outer nut 3 into a whole.

Furthermore, a convex block or a clamping groove is arranged on the inner wall of the sleeve 6, a clamping groove or a convex block 5 which is matched and clamped with the convex block or the clamping groove is arranged on the inner nut 1 and/or the outer nut 3, and the sleeve 6, the inner nut 1 and the outer nut 3 are arranged in the clamping groove through the convex block to fix the sleeve 6 on the inner nut 1 and the outer nut 3. That is, the sleeve 6 is placed in the slots of the inner nut 1 and/or the outer nut 3 by the protruding blocks arranged thereon and clamped with each other, or the protruding blocks arranged on the inner nut 1 and/or the outer nut 3 are placed in the slots arranged on the sleeve 6 and clamped with each other.

Specifically, the depth of the inner hole of the sleeve 6 is slightly smaller than the sum of the heights of the inner nut 1 and the outer nut 3. Namely, after the sleeve 6 is sleeved on the inner nut 1 and the outer nut 3, a small part of the inner nut 1 is leaked outside, and the sleeve 6 can be conveniently taken down by slightly prying the sleeve 6, so that the maintenance is convenient.

When the bolt is used, a screw rod of the bolt penetrates through a fastened piece, after the bolt head is attached to the fastened piece, the inner nut is sleeved on one end, close to the fastened piece, of the screw rod, the outer nut is arranged on the outer side of the inner nut, after the adjacent end faces of the inner nut and the outer nut are attached (the protrusions are arranged in the grooves), the screw threads are screwed into the screw rod and sleeved on the screw rod, when the inner nut and the fastened piece are locked, only the inner nut is stressed, but the outer nut is not stressed, under the condition that the inner nut and the fastened piece are locked, the outer nut rotates reversely for a certain angle to enable the protrusions to extend out of the grooves, at the moment, the outer nut is obliquely jacked open, axial jacking force and radial torsion (commonly called as other strength) are generated to lock the inner nut and the outer nut on the screw rod and fix the screw rod simultaneously, and then the inner.

If the screw rod is a pure screw rod, the fastened piece can be arranged in the middle of the screw rod, an inner nut and an outer nut are respectively arranged at two ends of the screw rod, wherein the inner nut is close to the fastened piece, and the outer nut is arranged on the outer side of the inner nut.

The above embodiments and drawings are only for illustrating the technical solutions of the present invention and do not limit the present invention. It should be noted that, a person skilled in the art may modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for part or all of the technical features, and such modifications or substitutions are included in the scope of the claims of the present invention.

Claims

1. The utility model provides an anti-loosening combined nut which characterized in that: the nut comprises an inner nut and an outer nut, wherein the inner nut is sleeved at one end of a screw, the outer nut is sleeved on the screw and positioned outside the inner nut, and at least one end surface of the inner nut and the outer nut is provided with a groove or a protrusion which are matched with each other; when the protrusion is arranged in the groove, the adjacent end surfaces of the inner nut and the outer nut are attached, and the screw thread is fixed on the screw rod in a rotating mode, the inner nut is fixed, the outer nut rotates in the reverse direction for a certain angle to enable the protrusion to extend out of the groove, the outer nut is pushed open in an inclined mode, axial jacking force and radial torsion force are generated, and the inner nut and the outer nut are locked on the screw rod in a threaded mode and fixed.

2. The anti-loosening combination nut as claimed in claim 1, wherein: when the edges of the inner nut and the outer nut are aligned, the adjacent end faces are attached, and the protrusions are arranged in the grooves, the inner nut and the outer nut are integrally tapped to form inner threads.

3. The anti-loosening combination nut as claimed in claim 1, wherein: the protrusion is an inclined surface, and the height of the inclined surface is gradually reduced to zero towards the anticlockwise rotation direction of the outer nut.

4. The anti-loosening combination nut as claimed in claim 3, wherein: the slope of the inclined plane is larger than the slope of the internal threads on the internal nut and the external nut.

5. The anti-loosening combination nut as claimed in claim 4, wherein: the height of the inclined plane is greater than the thread pitch of the internal threads on the internal nut and the external nut.

6. The anti-loosening combination nut as claimed in claim 1, wherein: the protrusion and the groove are of arc structures, and the length of the protrusion is smaller than that of the groove.

7. The anti-loosening combination nut as claimed in claim 1, wherein: when the protrusion is arranged in the groove, the edges of the inner nut and the outer nut are aligned, and when the outer nut rotates anticlockwise to enable the protrusion to extend out of the groove, the edges of the inner nut and the outer nut are just aligned.

8. The anti-loosening combination nut as claimed in claim 7, wherein: the screw rod is characterized by further comprising a sleeve, when the outer nut rotates anticlockwise to enable the protrusion to extend out of the groove, edges of the inner nut and the outer nut are just aligned, and the sleeve is sleeved on the outer sides of the inner nut and the outer nut to connect the inner nut and the outer nut into a whole and lock and fix the inner nut and the outer nut on the screw rod.

9. The anti-loosening combination nut as claimed in claim 8, wherein: the inner wall of the sleeve is provided with a convex block or a clamping groove, the inner nut and/or the outer nut are/is provided with a clamping groove or a convex block which is matched and clamped with the convex block or the clamping groove, and the sleeve is fixed on the inner nut and the outer nut through the convex block arranged in the clamping groove.

10. The anti-loosening combination nut as claimed in claim 9, wherein: the telescopic top be equipped with inside intercommunication the opening, the diameter of opening is greater than with the external diameter of interior nut and outer nut complex screw rod to be less than interior nut and outer nut's external diameter, telescopic hole degree of depth slightly is less than interior nut and outer nut's high sum.