Flat-head rivet nut

Abstract

The utility model relates to the technical field of rivets, in particular to a flat-head rivet nut which comprises a nut body, a nut core, a nut core, a nut core and a nut core, the nut body is provided with a through hole, and the through hole sequentially comprises a first section part, a second section part, a third section part, a fourth section part and a fifth section part; the first section part and the fifth section part are cylindrical; the diameter of the second section part is gradually increased in the direction far away from the first section part; the diameter of the fourth section part is gradually increased in the direction far away from the fifth section part; the second section part and the fourth section part are symmetrically arranged on the two sides of the third section part, and the diameter of the third section part is larger than that of the second section part and / or the fourth section part. The utility model discloses a flat-head rivet nut, and aims to solve the problem that in the prior art, when a rivet nut in a middle expansion deformation mode is used, the fixing force has deviation.

Description

Technical Field

[0001] The utility model relates to the technical field of rivets, and more specifically, to a flat head rivet nut. Background Art

[0002] Rivets play a very important role in the installation of host computers. Complex products such as airplanes, cars, trains, elevators, air conditioners, computers, etc. all have the problem of installing parts on relatively thin boards. There are two traditional installation processes. One is to tap the internal threads on the thin board, but tapping the internal threads on thin boards below 6 mm often makes the installation unstable due to too few threads, and even causes connection failure due to broken threads when under stress. The second method is to use the process of welding nuts on thin boards, which easily leads to deformation of the thin boards and uneven welding surfaces. Sometimes the nuts fall off when under stress due to weak welding, causing damage to the installation. The development of rivet nuts has solved the problem of installing parts on thin boards.

[0003] Currently, there are roughly two types of rivet nuts. The first type is to achieve fixation by squeezing one end to expand so that the end cannot fall off; the second type is to open a strip hole on the side wall of the rivet nut. When in use, the side wall deforms outward to form an outwardly protruding annular surface to achieve fixation. This deformation method is similar to the deformation method of expansion screws.

[0004] Regarding the second type of intermediate expansion deformation, in actual use, it is found that for objects of the same thickness, the deformation of different rivet nuts will have deviations, resulting in different fixing forces at different fixing positions of the object. Utility Model Content

[0005] The main purpose of the utility model is to provide a flat head rivet nut, aiming to solve the problem of deviation in fixing force of rivet nuts with intermediate expansion deformation in the prior art when in use.

[0006] In order to solve the above technical problems, a flat head rivet nut is proposed, comprising: a nut body, provided with a through hole arranged through, wherein the through hole sequentially comprises a first section, a second section, a third section, a fourth section and a fifth section;

[0007] The first section and the fifth section are cylindrical;

[0008] The diameter of the second section gradually increases in a direction away from the first section;

[0009] The diameter of the fourth section gradually increases in a direction away from the fifth section;

[0010] The second section and the fourth section are symmetrically arranged on both sides of the third section, and the diameter of the third section is greater than the diameter of the second section and / or the fourth section.

[0011] In any of the above technical solutions, further, the nut body includes:

[0012] An end portion and a rod portion, wherein the end portion and the rod portion are coaxially arranged, and the through hole is coaxially arranged at the end portion and the rod portion;

[0013] The end portion has a diameter that gradually decreases in a direction away from the rod portion.

[0014] In any of the above technical solutions, further, a plurality of protrusions are provided on the side of the end portion close to the rod portion;

[0015] And / or, a plurality of grooves are provided on the side of the end portion close to the rod portion.

[0016] In any of the above technical solutions, further, two or more first through holes are evenly arranged on the circumference of the third section.

[0017] In any of the above technical solutions, further, the second section and the fourth section are evenly provided with a plurality of second through holes on their circumferences.

[0018] In any of the above technical solutions, further, the spacing between the second through holes of the second section gradually decreases in a direction away from the first section;

[0019] The second through holes of the fourth section have a gradually decreasing spacing in a direction away from the fifth section.

[0020] In any of the above technical solutions, further, the fifth section is provided with a stepped surface.

[0021] The beneficial effects are:

[0022] The flat head rivet nut of the utility model is provided with a through hole on the nut body, and the through hole is divided into a first section, a second section, a third section, a fourth section and a fifth section in sequence and continuously. The first section is set as a cylindrical surface to facilitate guiding the rivet; the second section and the fourth section are set as shapes with gradually decreasing diameters in a direction away from the third section to facilitate deformation of the second section and the fourth section when they expand, so as to reduce the force required for deformation of the two parts; and the diameter of the third section is set to be larger than the diameter of the second section, so that the third section forms an easily deformable part on the nut body, so that the third section can become the first deformation point when the nut body is acted upon, so that the deformation point of the rivet nut is fixed each time it is deformed, thereby eliminating the problem of deviation in the fixing force of the rivet nut when it is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of a flat head rivet nut of the utility model;

[0025] Figure 2 The utility model is a three-dimensional structural schematic diagram of a flat head rivet nut.

[0026] The following are the descriptions of the reference numerals:

[0027] 1. Nut body; 101. first section; 102. second section; 103. third section; 104. fourth section; 105. fifth section;

[0028] 2. end; 201. protrusion; 202. groove;

[0029] 3. Rod. DETAILED DESCRIPTION

[0030] Below, the example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] It should be noted that, as shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0032] If the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0035] The utility model provides a flat head rivet nut. Through the mutual cooperation of the second section 102, the third section 103 and the fourth section 104, the third section 103 is the most easily deformed part of the rivet nut when it is acted upon, and then the second section 102 and the fourth section 104 follow the third section 103 to perform symmetrical deformation, the deformation point is fixed, the deformation interval is stable, and the deformation resistance is small.

[0036] A flat head rivet nut of the present application is described in detail through the following embodiments.

[0037] In this embodiment, if Figure 1 and Figure 2 As shown, the flat head rivet nut comprises: a nut body 1, provided with a through hole arranged therethrough, the through hole sequentially comprises a first section 101, a second section 102, a third section 103, a fourth section 104 and a fifth section 105; the first section 101 and the fifth section 105 are cylindrical; the diameter of the second section 102 gradually increases in a direction away from the first section 101; the diameter of the fourth section 104 gradually increases in a direction away from the fifth section 105; the second section 102 and the fourth section 104 are symmetrically arranged on both sides of the third section 103, and the diameter of the third section 103 is greater than the diameter of the second section 102 and / or the fourth section 104.

[0038] In the present technical solution, in order to facilitate description, the nut body 1 is placed vertically, the upper side with a larger outer diameter, i.e., the end portion 2, and the lower side with a smaller outer diameter, i.e., the rod portion 3, are coaxially arranged in the middle of the nut body 1 through a hole, and the nut body 1 is penetrated in the up and down directions through the hole, and the first section 101, the second section 102, the third section 103, the fourth section 104 and the fifth section 105 are arranged from top to bottom through the hole.

[0039] The first section 101 and the fifth section 105 are both configured as cylindrical holes, the cylindrical hole of the first section 101 is convenient for guiding the sliding of the rivet, and the cylindrical hole of the fifth section 105 is convenient for the abutment of the rivet. The inner diameter of the second section 102 gradually increases from top to bottom, and the inner diameter of the fourth section 104 gradually decreases from top to bottom, and the second section 102 and the fourth section 104 are symmetrically arranged relative to the third section 103.

[0040] The third section 103 is set as a partial spherical surface and is symmetrically arranged from top to bottom. The outer diameters of the nut body 1 corresponding to the second section 102, the third section 103 and the fourth section 104 are all the same, so that the wall thickness of the nut body 1 corresponding to the second section 102, the third section 103 and the fourth section 104 changes from top to bottom, first slowly decreasing (second section 102), then sharply decreasing (third section 103), then sharply increasing (third section 103), and finally slowly increasing (fourth section 104), so that the third section 103 is the most easily deformed part of the nut body 1.

[0041] In some technical solutions, the second section 102 and the fourth section 104 are configured as conical surfaces or arc surfaces.

[0042] In some other technical solutions, a chamfer is provided at a connection between the second section 102 and the third section 103 , and at a connection between the fourth section 104 and the third section 103 .

[0043] In this embodiment, the nut body 1 includes:

[0044] The end portion 2 and the rod portion 3 are coaxially arranged, and the through hole is coaxially arranged on the end portion 2 and the rod portion 3;

[0045] The diameter of the end portion 2 gradually decreases in a direction away from the stem portion 3 .

[0046] In the present technical solution, the outer diameter of the end portion 2 gradually decreases from bottom to top, which, on the one hand, facilitates the bottom surface of the end portion 2 to fit with the surface of the object to be fixed, and on the other hand, can reduce the possibility of the end portion 2 scratching foreign objects.

[0047] In this embodiment, a plurality of protrusions 201 are provided on the side of the end portion 2 close to the rod portion 3;

[0048] And / or, a plurality of grooves 202 are provided on the side of the end portion 2 close to the rod portion 3 .

[0049] In the present technical solution, a plurality of protrusions 201 and a plurality of grooves 202 are provided on the bottom surface of the end portion 2, and each protrusion 201 and each groove 202 are arranged one by one at intervals, and the radial length of the protrusion 201 is greater than the radial length of the groove 202.

[0050] In this embodiment, two or more first through holes are evenly arranged on the circumference of the third section 103 .

[0051] In the technical solution, four circular first through holes are evenly arranged on the circumference of the third section 103 .

[0052] In this embodiment, a plurality of second through holes are evenly disposed around the circumference of the second section 102 and the fourth section 104 .

[0053] In the present technical solution, four second through holes are evenly arranged on the circumference of the second section 102 and the fourth section 104, and the positions of the second through holes differ from the positions of the first through holes by 90° on the circumference.

[0054] In this embodiment, the spacing between the second through holes of the second section 102 gradually decreases in a direction away from the first section 101;

[0055] The spacing between the second through holes of the fourth section 104 gradually decreases in a direction away from the fifth section 105 .

[0056] In the present technical solution, the width of the second through hole of the second section 102 gradually decreases from top to bottom, and the width of the second through hole of the fourth section 104 gradually decreases from bottom to top.

[0057] In this embodiment, the fifth section 105 is provided with a stepped surface.

[0058] In the technical solution, the cross section of the stepped surface is Z-shaped or broken line-shaped.

[0059] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A flat head rivet nut, characterized in that: include: The nut body (1) is provided with a through hole which is arranged through the nut body, and the through hole includes a first section (101), a second section (102), a third section (103), a fourth section (104) and a fifth section (105) in sequence; The first section (101) and the fifth section (105) are cylindrical; The diameter of the second section (102) gradually increases in a direction away from the first section (101); The diameter of the fourth section (104) gradually increases in a direction away from the fifth section (105); The second section (102) and the fourth section (104) are symmetrically arranged on both sides of the third section (103), and the diameter of the third section (103) is greater than the diameter of the second section (102) and / or the fourth section (104).

2. The flat head rivet nut according to claim 1, characterized in that: The nut body (1) comprises: An end portion (2) and a rod portion (3), wherein the end portion (2) and the rod portion (3) are coaxially arranged, and the through hole is coaxially arranged on the end portion (2) and the rod portion (3); The diameter of the end portion (2) gradually decreases in a direction away from the rod portion (3).

3. The flat head rivet nut according to claim 2, characterized in that: A plurality of protrusions (201) are provided on the side of the end portion (2) close to the rod portion (3); And / or, a plurality of grooves (202) are provided on the side of the end portion (2) close to the rod portion (3).

4. The flat head rivet nut according to claim 1, characterized in that: The third section (103) is evenly provided with two or more first through holes around its circumference.

5. The flat head rivet nut according to claim 1, characterized in that: A plurality of second through holes are evenly arranged on the circumference of the second section (102) and the fourth section (104).

6. The flat head rivet nut according to claim 5, characterized in that: The spacing between the second through holes of the second section (102) gradually decreases in a direction away from the first section (101); The spacing between the second through holes of the fourth section (104) gradually decreases in a direction away from the fifth section (105).

7. The flat head rivet nut according to claim 1, characterized in that: The fifth section (105) is provided with a stepped surface.

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