Round puncture nut

Abstract

The utility model relates to the technical field of puncture nuts, in particular to a round puncture nut which comprises a puncture nut body, a self-puncture cylinder is arranged on the puncture nut body, a plurality of symmetrically-distributed positioning grooves are formed in the puncture nut body, and a locking groove is formed between the puncture nut body and the self-puncture cylinder. A locking inner wall b is formed on the side, close to the locking groove, of the self-puncturing cylinder, a locking inner wall a is formed on the side, close to the locking groove, of the puncturing nut body, more workpiece deformation parts can be effectively contained through the optimal design of the locking groove, large-area attachment of the puncturing nut and a workpiece is achieved, and therefore the locking force and the structural strength are remarkably improved. The end face is provided with the positioning groove, rotation can be effectively prevented in the riveting process and after riveting is completed, the anti-torsion performance is further enhanced in cooperation with the design of the internal locking teeth, in addition, the locking inner wall is of an inclined structure, loosening after riveting can be effectively prevented, and the axial compressive strength is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to piercing nut technical field, concretely is circular piercing nut. BACKGROUND

[0002] Piercing nut is a kind of high-efficiency fastener for automobile manufacturing, its core feature is that it does not need to punch in advance, can directly penetrate thin plate material through pressure and form thread connection simultaneously, in the automobile field, it is widely used in the assembly of body sheet metal parts (such as door, engine hood, chassis), and it is especially suitable for the connection of lightweight materials such as aluminum material, high-strength steel, etc., and its working principle is to make the tip of the nut pierce the plate by hydraulic or mechanical pressure, and at the same time, it is tightly embedded with the material by deformation, forming a stable thread structure.

[0003] The application of piercing nut improves production efficiency and reduces manufacturing cost, has high tensile strength and vibration resistance, can adapt to complex working conditions of automobile, and at the same time, reduces material stress concentration problem, guarantees connection reliability, but it still has some problems: 1) the guide groove of piercing nut is designed as a straight groove, and the locking force of the deformed part of the workpiece riveting is insufficient; 2) the anti-torsion ability between the piercing nut and the workpiece after assembly is poor, and rotation is easy to occur under overload stress, therefore, in view of the above status, it is urgent to develop circular piercing nut to overcome the deficiencies in current actual application and meet the current demand. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing circular piercing nut to solve the problems in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: circular piercing nut, including piercing nut body, the self-piercing cylinder is equipped on the piercing nut body, a plurality of symmetrical distribution's positioning slot is seted up on the piercing nut body, the locking groove is seted up between the piercing nut body and the self-piercing cylinder, the locking inner wall b is formed on the side of the self-piercing cylinder adjacent to the locking groove, the locking inner wall a is formed on the side of the piercing nut body adjacent to the locking groove, a plurality of locking teeth are fixed in the corner position close to the locking inner wall a in the locking groove, specifically, the positioning slot is seted up, can avoid the circular piercing nut rotating randomly after pressure riveting installation, at the same time, the locking tooth is embedded in the deformed part of the workpiece pressed into the locking groove, the locking force is improved and the rotation is avoided, the locking tooth is in the shape of triangular prism, and one side wall is tightly combined with the locking inner wall a.

[0006] Preferably, the middle position of the piercing nut body is provided with an internal thread hole.

[0007] Preferably, the piercing nut body is cylindrical, and the inner end face is provided with a self-piercing cylinder.

[0008] Preferably, the puncture nut body is concentric with the puncture cylinder, and the center penetrates the internal thread hole.

[0009] Preferably, the locking inner wall a is inclined from the puncture nut body outer wall to the axial direction, the locking inner wall b is inclined from the puncture nut body axial direction to the outer wall direction, and the longitudinal section of the locking inner wall a and the locking inner wall b is in the shape of an "eight", specifically, by setting the inclination angle, the deformed part of the workpiece can be extruded into the locking groove during the pressure riveting process, and the locking effect is achieved, the workpiece is prevented from being separated, and the locking force is improved.

[0010] Compared with the prior art, the circular puncture nut has the following beneficial effects:

[0011] Through the optimization design of the locking groove, more workpiece deformation parts can be effectively accommodated, the puncture nut and the workpiece are large-area attached, and thus the locking force and the structural strength are significantly improved. The positioning groove is arranged on the end face, the rotation during the riveting process and after the riveting is completed can be effectively prevented, the internal locking tooth is designed, the anti-twisting performance is further enhanced, in addition, the locking inner wall adopts the inclined structure, the riveting loosening after riveting can be effectively prevented, and the axial compression strength is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor:

[0013] Figure 1 It is a front structure schematic view of the utility model;

[0014] Figure 2 It is a side structure schematic view of the utility model;

[0015] Figure 3 It is one of puncture nut body sectional view of the utility model;

[0016] Figure 4 It is the second puncture nut body sectional view of the utility model;

[0017] Figure 5 It is the side view longitudinal section of the puncture nut body of the utility model;

[0018] Figure 6 It is the A part enlarged schematic view of the utility model; Figure 5

[0019] ​In the figure: 10, puncture nut body; 110, positioning groove; 120, locking groove; 130, locking tooth; 140, internal thread hole; 150, locking inner wall a; 20, self-puncture cylinder; 210, locking inner wall b. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0022] Embodiment:

[0023] Please refer to Figures 1-6 The present application provides a technical solution: a circular puncture nut, comprising a puncture nut body 10, a self-puncture cylinder 20 is arranged on the puncture nut body 10, a plurality of symmetrical positioning grooves 110 are arranged on the puncture nut body 10, a locking groove 120 is arranged between the puncture nut body 10 and the self-puncture cylinder 20, a locking inner wall b 210 is formed on one side of the self-puncture cylinder 20 adjacent to the locking groove 120, a locking inner wall a 150 is formed on one side of the puncture nut body 10 adjacent to the locking groove 120, a plurality of locking teeth 130 are fixedly arranged at the corner position adjacent to the locking inner wall a 150 in the locking groove 120, the locking teeth 130 are annularly and equidistantly distributed, and specifically, the positioning grooves 110 arranged can avoid the circular puncture nut from rotating randomly after pressure riveting installation, the locking teeth 130 arranged can be embedded into the deformed part of the workpiece pressed into the locking groove 120, the locking force is improved and the rotation is avoided, the locking teeth 130 are in the shape of a triangular prism, and one side wall thereof is closely combined with the locking inner wall a 150.

[0024] Preferably, an internal thread hole 140 is arranged at the middle position of the puncture nut body 10.

[0025] Preferably, the puncture nut body 10 is in the shape of a cylinder, and a self-puncture cylinder 20 is arranged on the inner end face thereof.

[0026] Preferably, the piercing nut body 10 is concentric with the piercing cylinder 20, and the center penetrates the internal thread hole 140.

[0027] Preferably, the locking inner wall a 150 is inclined from the outer wall of the piercing nut body 10 to the axial direction, and the locking inner wall b 210 is inclined from the axial direction of the piercing nut body 10 to the outer wall direction, and the longitudinal section of the locking inner wall a 150 and the locking inner wall b 210 is in the shape of an "eight", specifically, by setting the design of the inclination angle, the deformed part of the workpiece can be extruded into the locking groove 120 during the pressure riveting process, and the locking effect is achieved, avoiding its separation and improving the locking force.

[0028] Working principle: Place the circular piercing nut in the pre-designed nut positioning hole, ensure the accurate positioning of the nut and the plate, use the pressure riveting equipment such as pressure riveting gun or pressure riveting machine, press the nut into the plate, start the pressure riveting equipment, the punch moves downward, the end of the piercing nut body 10 and the part of the piercing cylinder 20 are pressed into the plate, under the action of pressure, the plate is plastically deformed and filled into the locking groove 120 of the piercing nut body, forming a mechanical interlocking structure, in this process, the positioning groove 110 plays the effect of preventing the deflection and positioning of the piercing nut body 10, because the adjacent locking inner wall a 150 and the locking inner wall b 210 in the locking groove 120 are inclined, the deformed part of the workpiece in it can form a locking effect, and at the same time, cooperating with the several annularly distributed locking teeth 130, it can prevent rotation and improve the anti-twist effect.

[0029] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

Claims

1. A circular piercing nut, characterized by: The utility model provides a puncture nut body (10) is equipped with self puncture cylinder (20) on it, is equipped with a plurality of symmetrical distribution's positioning groove (110) on it, locking groove (120) is equipped with between puncture nut body (10) and self puncture cylinder (20), locking inner wall b (210) is formed to one side of self puncture cylinder (20) adjacent locking groove (120), locking inner wall a (150) is formed to one side of puncture nut body (10) adjacent locking groove (120), a plurality of locking teeth (130) are fixed with in the edge corner position of locking groove (120) adjacent locking inner wall a (150).

2. The circular piercing nut of claim 1, wherein: The middle position of the puncture nut body (10) is provided with an internal thread hole (140).

3. The circular piercing nut of claim 1, wherein: The puncture nut body (10) is cylindrical, and the inner end face is provided with a self-puncturing cylinder (20).

4. The circular piercing nut of claim 1, wherein: The puncture nut body (10) is concentric with the self-puncturing cylinder (20), and the center penetrates the internal thread hole (140).

5. The circular piercing nut of claim 1, wherein: The locking inner wall a (150) is inclined to the axial direction from the outer wall of the puncture nut body (10), the locking inner wall b (210) is inclined to the outer wall from the axial direction of the puncture nut body (10), and the longitudinal section of the locking inner wall a (150) and the locking inner wall b (210) is in the shape of an "eight".

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