CN210531380U

CN210531380U - Self-locking nut and filter

Info

Publication number: CN210531380U
Application number: CN201921198493.9U
Authority: CN
Inventors: 雷丽娜
Original assignee: Shenzhen Huaxin Beier Technology Co ltd
Current assignee: Shenzhen Huaxin Beier Technology Co ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-05-15
Anticipated expiration: 2029-07-29

Abstract

The utility model provides a self-locking nut and wave filter, self-locking nut are integrated into one piece structure, include: the main body supports a molding surface, a thread matching surface and a bending part; the thread matching surface and the bending part are folded and bent towards the reverse side of the self-locking nut; the design of the screw thread is matched with the screw thread matching surface in a screw way; the free end of the bending part is provided with a plurality of anti-skidding locking structures, so that the friction force is increased when the reverse side of the self-locking nut is contacted with a locking object to prevent the self-locking nut from sliding and lock the locking object. Set up a plurality of locking structure at the free end of the portion of bending, when precession self-locking nut, the screw thread fitting surface produces reverse effort with the bolt, this effort shows as positive pressure, thereby self-locking nut and bolt and self-locking nut and the frictional force of being connected the thing have been increased, combine the locking structure of self-locking nut bottom surface, thereby played the effect of auto-lock, ordinary nut is directly left out under this application with the lock-out state, connection structure's material has been saved, the cost of product has been reduced.

Description

Self-locking nut and filter

Technical Field

The utility model relates to a fields such as communication structure field especially relates to a self-locking nut and wave filter.

Background

In the current structure of the communication industry, especially in the fields of 4G and 5G, a plurality of products need to use nuts and bolts, such as passive device filter products. For product stability, the nut needs to have a self-locking anti-slip mechanism. To this end, it is common to add a washer or an external tooth lock washer under the nut, or to use a saw-tooth K-nut instead of a conventional nut.

In the design of anti-skid locking, a double-nut structure is generally used in the mechanical industry, and a matching structure of a nut and a self-locking nut is also used, the self-locking nut is not generally used as a main stressed fastener and is tightly backed on the nut to prevent the nut from loosening, and the principle of the self-locking nut is that positive pressure is generated by the anti-bending deformation of a metal plate, so that anti-skid self-locking friction force is formed.

When the self-locking nut in the prior art is used, a common nut is firstly matched with a bolt to fasten a locking object, then a fastening nut is screwed on and is screwed by hand to be in contact with the common nut, the self-locking nut is screwed by a spanner for 60-90 degrees to lock the common nut, and when the self-locking nut is loosened, the common hexagon nut is screwed to generate a gap with the self-locking nut, and then the locking nut can be loosened. The universal self-locking nut has a front surface and a back surface, the front surface is the surface inwards concave of the thread matching surface of the thread embedded on the bolt, the back surface is the surface outwards convex of the thread matching surface, when in use, the front surface is in contact with the common nut, the back surface is suspended, the self-locking nut can only be used as an accessory of a fixing device, the use is troublesome, and the structure of the two layers of nuts is thick.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a self-locking nut and wave filter, simple structure has saved connection structure's materials, has reduced the cost of product, further promotion profit margin.

In order to achieve the above object, a first aspect of the present invention provides a self-locking nut, which is an integrally formed structure, including:

the main body supports the molding surface; simultaneously connecting the threaded matching surface and the bending part; the thread matching surface and the bent part are folded and bent towards the reverse side of the self-locking nut;

matching surfaces of the threads: the self-locking nut is used for being in threaded screwing fit with a bolt, the threaded fitting surface is of a thin-wall structure, the threaded fitting surface and the bolt are in connection fit to form a spiral ascending fit with one thread pitch, the height difference of any two symmetrical points of the threaded fitting surface is one thread pitch of the bolt, the threaded fitting surface and the main body support forming surface are arranged in an acute angle and are folded and bent towards the back surface of the self-locking nut;

bending part: the free end of the folding bend of the bending part is provided with a plurality of locking structures, so that the reverse side of the self-locking nut does not rotate and slide when contacting with a locking object, and the locking object is locked.

Preferably, the locking structures are saw-tooth structures extending outwards, are arranged at equal intervals and extend towards the same direction.

Preferably, the locking structures are inwards concave sawtooth structures which are arranged at equal intervals and extend towards the same direction.

Preferably, the bending part is divided into a plurality of bending pieces with the same length, each bending piece is arranged at equal intervals or is connected with each other at an angle, and one or more locking structures are arranged at the free end of each bending piece.

Preferably, the sawtooth structure is any one or a combination of a triangle, a triangle-like or a trapezoid.

Preferably, the threaded matching surface and the position where the bolt is in screwing contact are separated into a plurality of sub screwing pieces at equal intervals.

On the other hand, this application still discloses a wave filter, including wave filter body, bolt and above-mentioned arbitrary one auto-lock nut, the wave filter body is including the apron, be provided with the confession on the apron the screw hole that the bolt passed, the bolt passes behind the screw hole pass the fixed locking of auto-lock nut.

The embodiment of the utility model provides a self-locking nut and wave filter, free end at the portion of bending sets up a plurality of locking structure, when carrying out the use, need not to fix with ordinary nut and bolt, directly leave away ordinary nut, make self-locking nut and bolt cooperate locking thing alone, and the locking structure of the free end of the portion of bending of self-locking nut is direct and the contact of locking thing, adopt frictional force between locking structure increase self-locking nut and the locking thing, it is more firm to make it lock, adopt one deck nut to lock, the whole thickness of nut under the locking state has been reduced, this structure light in weight, moreover, the steam generator is simple in process, height dimension can freely adjust, the requirement to product lightweight and size minification has been satisfied, connection structure's material has also been saved simultaneously, the cost of product has been reduced, further promotion profit space.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described below. It is understood that the drawings in the following description are merely exemplary of the invention and that other drawings may be derived by those skilled in the art without inventive exercise.

Fig. 1 is a schematic structural view of a self-locking nut according to a first embodiment of the present invention;

fig. 2 is a schematic view of a locking state of a self-locking screw and a locking object according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a self-locking nut according to a second embodiment of the present invention;

fig. 4 is a schematic structural view of a self-locking nut according to a third embodiment of the present invention;

fig. 5 is a schematic structural view of a self-locking nut according to a fourth embodiment of the present invention;

fig. 6 is a schematic structural view of a self-locking nut according to a fifth embodiment of the present invention;

fig. 7 is a schematic structural view of a self-locking nut according to a sixth embodiment of the present invention;

fig. 8 is a schematic structural view of a first embodiment of a threaded mating surface according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a second embodiment of a thread mating surface according to an embodiment of the present invention;

fig. 10 is a schematic view of a production process of the self-locking nut according to an embodiment of the present invention;

fig. 11 is a schematic flow chart of a stamping method for a structure bending portion according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. Based on these embodiments, all other embodiments obtained by a person of ordinary skill in the art without any creative effort fall within the protection scope of the present invention.

Fig. 1 illustrates a self-locking nut 10 according to an embodiment of the present invention, fig. 2 illustrates that the self-locking nut 10 is locked on a locking object 30 by a bolt 20 in an embodiment of the present invention, the self-locking nut 10 is an integrally formed structure, and mainly includes a main body support forming surface 100, a thread fitting surface 200 and a bending portion 300, wherein the main body support forming surface 100 is used for simultaneously connecting the thread fitting surface 200 and the bending portion 300, and is located between the two to function as a connecting support, it can be understood that the main body support forming surface 100, the thread fitting surface 200 and the bending portion 300 are an integral structure, and are relatively bent by a certain process to form three different portions, and since the three portions are relatively disposed at an angle, and the thread fitting surface 200 and the bending portion 300 are both bent with respect to the main body support forming surface 100, so that one side of the self-locking nut 10 is relatively smooth, in the present embodiment, the self-locking nut 10 is of a sheet metal structure, the thread mating surface 200 is of a thin-walled structure, the smooth surface of the self-locking nut 10 is referred to as a front surface, and the surface of the bent protrusion is referred to as a back surface. In this embodiment, the thread matching surface 200 and the bending part 300 are folded and bent towards the reverse side of the self-locking nut 10; the thread matching surface 200 and the main body support forming surface 100 are arranged at an acute angle and are folded and bent towards the reverse side of the self-locking nut 10; the center of the threaded mating surface 200 is a through hole structure to facilitate the passage of the bolt 20, so that the threaded mating surface 200 is matched and locked with the threaded structure 21 on the bolt 20. In design, because the thread structure 21 is a rotary extension structure on the bolt 20, the connection and matching between the thread matching surface 200 and the bolt 20 is a screw-up matching of one thread pitch, so the height difference of any two symmetrical points of the thread matching surface 200 is set as the thread pitch of the bolt, thus the thread matching surface 200 can be matched with the thread structure 21 of the bolt 20 in a screw manner, the thread matching surface 200 is subjected to bending stress through the screwing of the thread structure 21, pressure is generated, and the self-locking nut 10 plays a role in anti-skid self-locking because the friction force is increased when the bolt 20 is matched.

In this embodiment, a plurality of locking structures 310 are disposed at the free end of the bent portion 300, and meanwhile, when the self-locking nut is screwed in, a reverse acting force is generated between the thread matching surface 200 and the bolt 20, and the acting force is expressed as a positive pressure, so that the friction force between the self-locking nut and the bolt 20 and between the self-locking nut 10 and the locked object 30 is further increased, and the locking structure 310 on the bottom surface of the self-locking nut 10 is combined to play a self-locking role, so that the common nut and the bolt 20 are not required to be fixed, the common nut is directly omitted, the self-locking nut 10 and the bolt 20 are independently matched to lock the locked object 30, and the friction force between the self-locking nut and the locked object 30 is increased by using the locking structures 310, so that the locking is firmer, meanwhile, the material of the connecting structure is saved, and the.

The bending part 300 of this embodiment is folded and bent toward the reverse side of the self-locking nut 10, and the bending part 300 is arranged at a right angle to the main body support molding surface 100; in one embodiment, the body support forming surface 100 is a hexagonal surface structure, and the height may be used as a free dimension as in the shape and size of a hexagonal nut of the same specification. A plurality of locking structures 310 are arranged at the free end of the bending part 300, so that the friction force is increased when the reverse side of the self-locking nut 10 contacts with the locking object 30, and the locking object 30 is locked without rotating and sliding.

The technical scheme of this embodiment, because the free end at the portion of bending 300 sets up a plurality of locking structure 310, when using, need not to fix with ordinary nut and bolt 20, directly abandon ordinary nut, make self-locking nut 10 cooperate the locking locker 30 alone with bolt 20, and the locking structure 310 of the free end of the portion of bending 300 of self-locking nut 10 is direct to contact with locker 30, adopt locking structure 310 to increase frictional force between self-locking nut 10 and the locker 30, it is more firm to make it lock, adopt one deck nut to lock, the whole thickness of nut under the lock state has been reduced, connection structure's material has also been saved simultaneously, the cost of product has been reduced.

In one embodiment, the locking structures 310 are outwardly extending saw-tooth structures, which are respectively disposed at equal intervals and extend in the same direction. Referring to fig. 1, in one embodiment of the present application, an outwardly extending triangular structure is provided at a free end of a bending portion 300, and one of the corners of the triangular structure extends outwardly for contacting and locking with a locking object 30. In this embodiment, please refer to fig. 3, the locking structure 310 of the triangular structure is provided with a plurality of two locking structures 310 on the bending member 320 of each bending portion 300, and the two locking structures 310 are distributed at the free end of the bending portion 300, the larger the number of the locking structures 310 of the triangular structure is, the larger the friction with the locking object 30 is when in use, and the number of the locking structures 310 of the triangular structure is generally selected according to the performance and requirement of the locking object 30 to be locked.

In one embodiment, the locking structures 310 may be arranged equidistantly and in the same direction to maintain a uniform frictional force in all directions when the self-locking nut 10 is tightened with the locking object 30 by the bolt 20.

In an embodiment, as shown in fig. 4, the locking structure 310A may also be a triangle-like structure, wherein one side extending outward is an arc-shaped structure, so as to increase the contact area between the locking structure 310A and the locking object 30 and increase the friction force during the locking process, and the arc-shaped structure is also beneficial to reduce the abrasion of the locking structure 310A on the locking object 30.

In another embodiment, the locking structure 310 may also be a trapezoid structure (not shown) protruding outward, for example, two corners on the side contacting with the locking object 30 are designed, one is a right angle, the other is a right trapezoid with an acute angle, or both corners are acute angles, and a plurality of locking structures 310 in the trapezoid structure are arranged in the same direction and are spaced at equal intervals.

In an embodiment, the tightening structures are inwardly concave saw-tooth structures, which are respectively disposed at equal intervals and extend in the same direction. Referring to fig. 5, in order to provide an embodiment of the present invention, a concave triangular structure is disposed at a free end of the bending portion 300, and preferably, the concave triangular locking structure 310B is a right triangle, and a right-angle side is located at a position contacting with the locking object 30, such that the free end of the bending portion 300 forms a trapezoid structure with an obtuse angle structure, in this embodiment, a plurality of concave triangular locking structures 310B are disposed at the free end of the bending portion 300 and are equidistantly arranged to form a plurality of trapezoid structures with obtuse angles, which is beneficial to increase friction when the self-locking nut 10 contacts with the locking object 30.

In an embodiment, the shape of the concave in the locking structure 310 may also be a trapezoid structure, please refer to fig. 6, for example, the locking structure 310C is designed to be an isosceles trapezoid structure, so that the free end of the bending part 300 forms a trapezoid structure with a short side contacting the locking object 30, the trapezoid structure has two obtuse angles and may also be used to increase the friction force, and further, the concave trapezoid structure may be disposed at equal intervals, so that the force applied to the locking structure 310 is uniform.

In an embodiment, the locking structures 310 extending outward or protruding inward disclosed above may also be used in combination and disposed on the same self-locking nut 10, and the locking structures 310 of the two structures are alternately arranged in sequence, preferably, the two locking structures 310 are disposed at equal intervals.

In an embodiment, referring to fig. 1, the bending portion 300 is divided into a plurality of bending members 320 having the same length, each bending member 320 is ground to form a connecting portion 330 and connected to each other, and one or more locking structures 310 are disposed at free ends of the bending members 320.

In another embodiment, referring to fig. 7, one solution is that the bending portion 300 is divided into a plurality of bending members 320 having the same length, each bending member 320 is disposed at an equal interval, that is, there is no connection portion, each bending member 320 is suspended and does not contact with an adjacent bending member 320, one or more locking structures 310 are disposed on the free end of the bending member 320, and the interval between the bending members 320 is set to facilitate forming a buffer force when the locking structures 310 on the self-locking nut 10 contact and lock the locking object 30.

In an embodiment, the thread matching surface 200 is equally divided into a plurality of sub tightening pieces 210 adapted to be tightened with the bolt 20, the number of the sub tightening pieces 210 may be multiple, for example, 3 or 6, referring to fig. 8, three sub tightening pieces 210 are provided, referring to fig. 9, six sub tightening pieces 210 are provided, each sub tightening piece 210 is spaced, the height difference between two sub tightening pieces 210 at any symmetrical position is a thread pitch, that is, the heights of adjacent sub tightening pieces 210 are arranged in a sequentially ascending manner, so that friction is increased when the sub tightening pieces 210 are screwed with the thread structure 21 of the bolt 20, the thread matching surface 200 is subjected to bending stress, thereby generating pressure, and the self-locking nut 10 of the present application plays a role of anti-slip and self-locking, and its locking state referring to fig. 2, the height of the sub tightening piece 210 on the left side is exactly different from the height of the sub tightening piece 210 on the right side by one thread pitch, so that the threaded engagement surface 200 is locked with the bolt 20. In the use, compare in the middle of prior art and adopt hexagon nut directly to be connected with locking object 30, the mode of self-locking nut forward contact hexagon nut, forward installation promptly, this application self-locking nut 10 and locking object 30 direct contact realize reverse and locking object 30 direct contact, reverse installation promptly, under this kind of structure, sub-screwing piece 210 and bolt 20 are under the state of screwing, and its direction is opposite with the direction of prior art forward installation. In this embodiment, under the condition that the locking structure 310 is disposed at the free end of the bending portion 300, the thickness of the whole self-locking nut 10 can be relatively reduced and can also achieve the same locking state, and particularly, the thickness of the sub-screwing piece 210 can be reduced, and after the thickness of the sub-screwing piece 210 is reduced, the sub-screwing piece 210 is in closer contact with the thread structure 21 on the bolt 20, that is, the contact area between the free end of the sub-screwing piece 210 and the thread structure 21 is larger, so that the locking is firmer.

On the other hand, please refer to fig. 10, the present application discloses a production process of a self-locking nut, which is used for generating the self-locking nut structure disclosed above; the method mainly comprises the following steps:

s100, stamping a metal plate to form a main body support forming surface 100, a thread matching surface 200 and a bending part 300, so that the thread matching surface 200 and the bending part 300 are folded and bent towards the reverse side of the self-locking nut, the bending part 300 and the main body support forming surface 100 are arranged in a right angle, the thread matching surface 200 and the main body support forming surface 100 are arranged in an acute angle, and the bending part 300 is stamped to form a plurality of locking structures 310;

s200, punching the thread matching surface 200 to enable the thread matching surface 200 to be in screwing contact with the bolt 20 to form a plurality of sub-screwing pieces 210 at equal intervals; the connection fit between the threaded fitting surface 200 and the bolt 20 is a screw-up fit with one thread pitch, and the height difference between any two symmetrical sub tightening pieces 210 is one thread pitch;

and S300, punching and shearing the unnecessary burrs.

In an embodiment, referring to fig. 11, the method for stamping the bending portion 300 includes:

s110, stamping, blanking and cutting the free end of the bending part to evenly cut the free end into more than three bending parts with equal length, and forming one or more locking structures on each bending part;

and S120, folding the bending piece by 90 degrees relative to the main body support forming surface.

The pressing is performed by pressing a middle portion of the metal plate material, specifically, a center of the metal plate material to a boundary line position between the bent portion 300 and the main body support molding surface 100, on one surface of the metal plate material, so that the bent portion 300 is disposed at a right angle to the main body support molding surface 100. In several embodiments as shown in fig. 1-6, the bending members 320 are connected by the connecting portion 330, and during the process of stamping the whole bending portion 300, the position of the connecting portion 330 is changed by pressing, after the bending portion 300 is folded by 90 degrees along the first direction, the bending portion 300 is equally divided into a plurality of sections with equal distances, and after the position of the connecting portion 330 is determined, the connecting portion 330 is polished.

Further, in another embodiment, as shown in fig. 7, the bending pieces 320 are arranged at intervals, please refer to fig. 11, the stamping method of the bending portion 300 with such a structure is to punch in step S110, and cut the bending portion 300 by blanking, equally divide the bending portion 300 into more than three bending pieces 320 with equal length, equally distribute one or more than one locking structures 310 on the free end of each bending piece 320, and equally distribute the intervals between two adjacent bending pieces 320;

because there is not connecting portion 330 between the piece 320 of buckling, consequently, carry out the blanking cutting to connecting portion 330 in the process of carrying out the punching press to elbow 300 to excise the material on connecting portion 330, equally divide into the piece 320 of buckling that the length equals more than three with the portion 300 of bending, press again the middle part of sheet metal, specifically press the center of sheet metal to the border line position between portion 300 of bending and the main part support profiled surface 100, so that portion 300 of bending is the right angle setting for main part support profiled surface 100.

In the stamping method disclosed above, the bending portion 300 is provided with one or more locking structures 310, the locking structures 310 are obtained by stamping or cutting before the bending portion 300 is bent into a right angle, specifically, the locking structures 310 on the bending portion 300 have various structures, both the disclosed outwardly extending sawtooth structures and the inwardly recessed sawtooth structures are obtained by stamping the free ends of the bending portion, and the sawtooth structures are respectively arranged at equal intervals and extend in the same direction.

In the present embodiment, the locking structure 310 on the folded part 300 is formed by stamping and is cut by stamping at equal intervals along the edge of the folded part 300 according to the shape of the locking structure 310, so as to form any one or more combinations of the above-disclosed triangular, triangle-like or trapezoidal structures extending outwards, or the triangular, triangle-like or trapezoidal structures protruding inwards.

After the bending portion 300 is punched, the whole metal plate is reversed, the central position of the metal plate is circular, blanking and cutting are performed along a second direction, and punching is performed simultaneously to form the thread matching surface 200 structure, wherein the second direction is opposite to the first direction, the blanking and cutting enable the middle of the self-locking nut to be a hollow structure, and the screwing piece is arranged at an acute angle relative to the main body support forming surface 100 in a punching mode, so that screwing matching can be performed conveniently with the thread structure 21 on the bolt 20 penetrating through the central structure.

On the other hand, the application also discloses a filter (not shown in the figure), which includes a filter body (not shown in the figure), a bolt 20 and the self-locking nut 10 of any one of the above, wherein the filter body includes a cover plate (equivalent to the above-mentioned locking object 30), the cover plate is provided with a threaded hole for the bolt to pass through, and the bolt 20 passes through the threaded hole and then is fixed and locked by the self-locking nut 10.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides a self-locking nut, its characterized in that, self-locking nut is integrated into one piece structure, includes:

2. The self-locking nut of claim 1, wherein the locking structure is an outwardly extending saw-tooth structure, each of which is spaced apart from each other at equal intervals and extends in the same direction.

3. The self-locking nut of claim 1, wherein the locking structure is an inwardly concave saw-tooth structure, and the saw-tooth structure is disposed at equal intervals and extends in the same direction.

4. The self-locking nut of any one of claims 1 to 3, wherein the bent portion is divided into a plurality of bent pieces having the same length, each of the bent pieces is disposed at an equal interval or is connected to each other at an angle, and one or more locking structures are disposed on free ends of the bent pieces.

5. The self-locking nut of claim 2 or 3, wherein the saw-tooth structure is any one or a combination of a triangle, a triangle-like or a trapezoid.

6. The self-locking nut of claim 1, wherein the threaded engagement surface is spaced equidistantly from the point of tightening contact of the bolt into a plurality of sub-tightening tabs.

7. A filter, characterized by comprising a filter body, a bolt and the self-locking nut of any one of the claims 1 to 6, wherein the filter body comprises a cover plate, the cover plate is provided with a threaded hole for the bolt to pass through, and the bolt is fixedly locked by the self-locking nut after passing through the threaded hole.