CN217381240U

CN217381240U - Prevent changeing rivet nut

Info

Publication number: CN217381240U
Application number: CN202220946883.5U
Authority: CN
Inventors: 王立俊; 柯书忠; 高靖靖; 徐家强; 石大鹏; 殷银银; 李旭健; 付建建
Original assignee: Henan Aerospace Precision Machining Co Ltd
Current assignee: Henan Aerospace Precision Machining Co Ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-09-06
Anticipated expiration: 2032-04-22

Abstract

The utility model relates to a prevent changeing rivet nut. Including nut head and screw rod part, the shape of nut head is cylinder or big-end-up's round platform of falling, screw rod part is cylindricly, screw rod part is equipped with unthreaded hole portion and screw thread portion along the extending direction, unthreaded hole portion forms the riveting when the riveting and expands protrudingly, the nut head is connected to the upper end of unthreaded hole portion, lower extreme connection screw thread portion, be equipped with reticulation knurl face on the lateral wall of unthreaded hole portion, reticulation knurl face is used for expanding bellied outer wall face formation friction fit face in the riveting, in order to be in the cooperation of being riveted the piece locking. The utility model discloses an it sets up reticulation knurl face to prevent changeing nut in the unthreaded hole portion surface of screw rod part, utilizes the riveting nut riveting when warping and by the squeezing action between the riveting piece, forms the friction and ends changeing the structure to make the processing cross-section who prevents changeing the riveting nut can design for processing and the lower circular of the assembly degree of difficulty, be convenient for prevent changeing the processing and the assembly of riveting nut, improved processing assembly efficiency.

Description

Prevent changeing rivet nut

Technical Field

The utility model relates to a riveting fastener, concretely relates to prevent changeing rivet nut.

Background

The riveting fastener commonly used in the prior art comprises a riveting nut, a rivet and the like, for example, the sealing rivet nut disclosed in the Chinese patent with the application publication number of CN114060389A comprises a rod part and a flange part, wherein the flange part is a round head, the outer wall of the rod part is a smooth surface, and the rod part is outwards deformed in the rivet process so as to be in butt contact with a plate, so that the riveting and fastening of the plate are realized. The riveting fastener only has the function of riveting fastening and does not have the function of rotation prevention, and in the long-term use process, due to reasons of mechanical vibration, abrasion and the like, riveting loosening is often caused, so that the riveting fastener rotates or rotates relatively, and riveting failure is caused.

In order to solve the problem, the riveting fastener in the prior art is correspondingly improved, so that the riveting fastener has an anti-rotation function. For example, chinese patent with publication number CN201636181U discloses an anti-rotation self-locking rivet nut, which is in a circular tube shape, wherein an inner hole of the circular tube includes a smooth hole section and a thread section, and a countersunk head of a non-circular structure is disposed at an end of the smooth hole section. For example, in the rivet nut disclosed in chinese patent application publication No. CN114076141A, the outer side wall of the middle portion of the nut body is a regular hexagon, correspondingly, a regular hexagon opening is also formed in the fixed object, and the outer side wall of the regular hexagon is matched with the corresponding regular hexagon opening, so that the rivet nut is fixed and prevented from rotating.

However, in the actual process, such non-circular countersunk head or polygonal outer side wall is not easy to be processed, and the corresponding riveted plate needs to be processed with a corresponding non-circular countersunk head hole or polygonal open hole, so that the whole processing difficulty of the riveting fastener is high, the processing cost is high, and the large-scale processing is difficult. Meanwhile, when the riveting nut is riveted, the outer wall surface of the nut and the mounting hole corresponding to the shape on the riveted part are aligned to be inserted, otherwise, the anti-rotation effect cannot be achieved, the nut and the riveted part can be damaged, the operation is inconvenient, and the processing and assembling efficiency is affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an prevent changeing rivet nut for solve the current big and inconvenient problem of assembly of the rivet nut processing degree of difficulty of preventing changeing.

In order to achieve the above object, the utility model provides an anti-rotation rivet nut adopts following technical scheme: including nut head and screw rod part, the shape of nut head is the cylinder or big-end-up's round platform of falling, the external diameter of nut head is greater than the external diameter of screw rod part, the screw rod part is cylindricly, the screw rod part is equipped with unthreaded portion and screw thread portion along the extending direction, the wall thickness of unthreaded portion is less than the wall thickness of screw thread portion and expands protrudingly in order to form the riveting when the riveting, be equipped with the internal thread on the interior pore wall of screw thread portion, the nut head is connected to the upper end of unthreaded portion, lower extreme connecting thread portion, be equipped with the reticulation knurl face on the lateral wall of unthreaded portion, the reticulation knurl face is used for expanding bellied outer wall face formation friction fitting surface in the riveting, the friction fitting surface is used for with by the riveting piece detent cooperation.

The beneficial effects are that: the outer side wall of the unthreaded hole part with the thin wall thickness is provided with the reticulate pattern knurled surface, deformation of the unthreaded hole part of the screw part is facilitated, the friction coefficient of the reticulate pattern knurled surface is large, the reticulate pattern knurled surface is matched with the extrusion effect of the unthreaded hole part which is outwards protruded and deformed in the riveting process and is generated between the unthreaded hole part and the riveted part, the reticulate pattern knurled surface is in close extrusion contact with the riveted part, the friction force between the rivet nut and the riveted part is greatly increased, the anti-torsion moment of the rivet nut is improved, the effect of preventing the rivet nut from rotating is achieved by adopting a simple structure, extra special processing such as non-circular processing and the like is not needed for a countersunk head structure of the nut head and a riveting hole of the riveted part, the shape of a cylinder or a circular truncated cone of the nut head is reserved, the processing and assembling difficulty of the rivet nut is greatly reduced, the processing efficiency is improved, and the processing cost is reduced.

Preferably, the outer side wall of the smooth hole part is also provided with a smooth surface, the smooth surface is positioned above the reticulate knurling surface, and the smooth surface is used for being in sliding fit with the hole wall of the riveting hole of the riveted part.

The beneficial effects are that: the reticulation knurl face top on unthreaded hole portion lateral wall sets up the smooth surface, through the smooth surface with by the riveting hole cooperation of riveting piece, reduces the resistance that receives when riveting nut inserts the riveting hole, and the cartridge of being convenient for is riveted, has reduced the assembly degree of difficulty. Meanwhile, the area of the reticulated knurled surface to be processed on the outer wall surface of the unthreaded hole part is reduced, particularly, the reticulated knurled surface does not need to be processed at the position close to the nut head with higher processing difficulty, and the processing difficulty is greatly reduced.

Preferably, the smooth surface and the reticulated knurled surface are both circular ring-shaped surfaces, and the smooth surface is connected between the reticulated knurled surface and the outer side surface of the nut head in a transition mode.

Preferably, the textured knurl surface has a texture modulus of 0.2 and an angle of 30 °.

The beneficial effects are that: the riveting nut has the advantages that the friction resistance of the riveting nut in the rotating direction is large, the friction resistance of the riveting direction is small, and the riveting nut can be conveniently inserted into the riveting hole in the riveted part while the anti-rotating effect is guaranteed.

Preferably, the angle between the outer side wall of the nut head and the outer cylinder wall of the screw portion is 120 °.

Preferably, the nut head and the screw rod are partially coated with HD7352 molybdenum disulfide, and the coating thickness is 5-20 μm.

The beneficial effects are that: the coating HD7352 molybdenum disulfide can play a lubricating role while being taken as an anti-oxidation coating, so that the smooth hole part provided with the reticulate knurling surface can be conveniently and smoothly inserted into the riveted part.

Preferably, the nut head has an upwardly and downwardly extending cylindrical bore arranged coaxially with and of the same diameter as the bore of the screw portion.

The beneficial effects are that: the nut head and the screw rod part are provided with cylindrical inner holes which are coaxially arranged and have the same diameter, so that the processing of the rivet nut and the assembly connection of the rivet nut and the corresponding threaded fastener are facilitated.

Drawings

FIG. 1 is a half sectional view of an anti-rotation rivet nut of the present invention;

fig. 2 is a semi-sectional view of the anti-rotation rivet nut and the riveted part.

In the figure: 1. a nut head; 2. a screw portion; 3. a light aperture portion; 4. a threaded portion; 5. riveting the expansion bulge; 6. a smooth surface; 7. a textured knurled surface; 8. an internal thread; 9. a riveted part; 10. a friction mating surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. 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 following detailed description of the embodiments of the present invention, presented 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 embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …," or the like, does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The utility model discloses a prevent changeing specific embodiment who rivets nut: as shown in fig. 1, the anti-rotation rivet nut of the embodiment mainly includes a nut head 1 and a screw part 2, the nut head 1 is a hollow inverted round table with a cylindrical inner hole and a large top and a small bottom, the screw part 2 is cylindrical, the outer diameter of the nut head 1 is greater than that of the screw part 2, the inner hole of the nut head 1 and the inner hole of the screw part 2 are coaxially arranged and have the same diameter, the lower end of the nut head 1 is in smooth transition connection with the upper end of the screw part 2, and an included angle of 120 ° is formed between the outer side wall of the nut head 1 and the outer cylinder wall of the screw part 2.

Specifically, the screw portion 2 is provided with a unthreaded part 3 and a threaded part 4 along the extending direction thereof, the wall thickness of the unthreaded part 3 is smaller than that of the threaded part 4, so that the unthreaded part 3 is more easily deformed by being pressed when a rivet nut is riveted to form a rivet expansion boss 5, and the inner hole wall of the threaded part 4 is provided with an internal thread 8 for connecting threaded fasteners such as screws, studs and the like. Smooth surface 6 and modulus are 0.2 on the outer tube wall of light hole portion 3, the angle is 30 reticulation knurl face 7, smooth surface 6 sets up in reticulation face top in order to be riveted the hole pore wall sliding fit of 9 by the riveting, be convenient for rivet nut inserts by the riveting 9 in the riveting hole, reticulation knurl face 7 is used for expanding protruding 5 outer wall surface formation friction fit face 10 in the riveting when the riveting, increase the riveting and expand protruding 5 and by the frictional force between the 9 of riveting, realize rivet nut and by the cooperation of splining of riveting 9, prevent that rivet nut from rotating for by riveting 9. In addition, the surface of the anti-rotation rivet nut of the embodiment is coated with the HD7352 molybdenum disulfide layer with the thickness of 5-20 μm, so that the anti-corrosion performance of the rivet nut can be improved while the lubrication effect is realized so that the rivet nut can be inserted into the riveted part 9.

The utility model discloses an above-mentioned embodiment prevent changeing the nut rivet when using, refer to fig. 2 and show, it is downthehole to insert the riveting by riveting 9 with the nut rivet through riveting tool, rivet the nut in by riveting 9 through riveting tool, 3 outside deformations of unthreaded hole portion of nut rivet form riveting expansion arch 5, reticulation knurl face 7 is as the protruding 5 friction fit face 10 of riveting expansion, friction fit face 10 and by the bottom surface of riveting 9 and the crowded tight cooperation of pore wall in the riveting hole part under the great squeezing force effect that the riveting produced, make the nut rivet receive very big friction resistance on its rotation direction, effectively prevented that the nut rivet from rotating for by riveting 9. The nut head 1 or the stud part of the riveting nut does not need to be designed into a non-circular rotation stopping structure with high processing difficulty, the riveting hole of the riveting piece 9 does not need to be processed into a shape corresponding to the riveting hole, the riveting nut and the riveting hole corresponding to the riveting piece 9 can be designed into a circular shape, the processing difficulty is greatly reduced, and the circular riveting nut does not need special corresponding relation when the circular riveting hole is plugged, the assembling difficulty is reduced, the riveting assembly operation of operators is facilitated, and the riveting assembly efficiency is greatly improved.

Of course, the utility model discloses an prevent changeing rivet nut is not limited to the embodiment that above-mentioned introduced, and this paper still provides other several kinds of embodiments based on the utility model relates to a prevent changeing rivet nut of design, specifically as follows:

in other embodiments of the anti-rotation rivet nut, which differ from the above embodiments, are: the nut head can also be cylindrical, and a cylindrical inner hole does not need to be arranged on the nut head.

In other embodiments of the anti-rotation rivet nut, which differ from the above embodiments, are: the smooth surface is not arranged on the outer side wall of the unthreaded hole part of the screw rod part, but the smooth surface is completely covered by a reticulate knurled surface, and the reticulate knurled surface is in transitional connection with the outer wall of the nut head and the outer wall of the threaded part.

In other embodiments of the anti-rotation rivet nut, which differ from the above embodiments, are: the mesh modulus and the angle of the knurled structure can also be set to other values, and the friction coefficient can be increased.

In other embodiments of the anti-rotation rivet nut, which differ from the above embodiments, are: the included angle between the outer side wall of the nut head and the outer cylinder wall of the screw rod part can be 90 degrees or 100 degrees or other numerical values, and the nut head can also be a hollow cylinder with a cylindrical inner hole.

In other embodiments of the anti-rotation rivet nut, which differ from the above embodiments, are: the surface of the anti-rotation rivet nut can also be coated with other materials besides molybdenum disulfide as a coating, such as grease, silicon carbide and other coatings with lubricating effect and antioxidant function.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, the scope of the present invention is defined by the appended claims, and all the structural changes equivalent to the content of the description and the attached drawings should be included in the same way.

Claims

1. The utility model provides an anti-rotation rivet nut, includes nut head (1) and screw rod part (2), the shape of nut head (1) is the cylinder or big-end-up's round platform that falls, the external diameter of nut head (1) is greater than the external diameter of screw rod part (2), screw rod part (2) are cylindric, and screw rod part (2) are equipped with unthreaded hole portion (3) and screw thread portion (4) along the extending direction, the wall thickness of unthreaded hole portion (3) is less than the wall thickness of screw thread portion (4) is in order to form riveting expansion protrusion (5) when riveting, be equipped with internal thread (8) on the interior pore wall of screw thread portion (4), the upper end of unthreaded hole portion (3) is connected nut head (1), lower extreme connection screw thread portion (4), its characterized in that be equipped with reticulation knurl face (7) on the lateral wall of unthreaded hole portion (3), reticulation knurl face (7) are used for forming friction fit surface (10) at the outer wall face of riveting expansion protrusion (5), the friction matching surface (10) is used for matching with the riveted piece (9) in a rotation stopping way.

2. An anti-rotation rivet nut according to claim 1, characterized in that the smooth surface (6) is also provided on the outer side wall of the smooth hole portion (3), the smooth surface (6) is above the knurled surface (7), and the smooth surface (6) is used for sliding fit with the hole wall of the riveting hole of the riveted piece (9).

3. An anti-rotation rivet nut according to claim 2, characterized in that the smooth surface (6) and the knurled surface (7) are both circular surfaces, and the smooth surface (6) is connected in transition between the knurled surface (7) and the outer side of the nut head (1).

4. Anti-spin rivet nut according to claim 1, characterized in that the cross-hatched knurled surface (7) has a cross-hatch modulus of 0.2 and an angle of 30 °.

5. Anti-rotating rivet nut according to claim 1, characterized in that the angle between the outer side wall of the nut head (1) and the outer cylinder wall of the screw portion (2) is 120 °.

6. An anti-spin rivet nut according to claim 1, characterized in that the nut head (1) and the screw portion (2) are coated with HD7352 molybdenum disulfide, the coating thickness being 5-20 μm.

7. An anti-rotation rivet nut according to claim 1, characterized in that the nut head (1) has a cylindrical bore extending up and down, which is arranged coaxially with the bore of the screw portion (2) and has the same diameter.