阅读说明：本技术 具有自钻、自攻、自锁功能的紧固件 (Fastener with self-drilling, self-tapping and self-locking functions ) 是由 燕存露 章华 唐勇 傅忠良 于 2020-12-07 设计创作，主要内容包括：本申请公开了一种具有自钻、自攻、自锁功能的紧固件,属于紧固件领域,用于钣金与型材连接,其包括螺杆及螺帽,螺帽位于螺杆的顶部,所述螺杆以螺帽所在一端为起始端沿螺杆的中心轴线向远离螺帽的方向依次加工有自锁段、攻入段和钻孔段,其中所述自锁段和攻入段均为螺纹结构,所述钻孔段在远离螺帽的方向上其外径逐渐缩小。鉴于上述技术方案,本申请能够提高连接副的可靠性、且具备可拆卸能力和反复使用的功能。(The application discloses fastener with from boring, self-tapping, auto-lock function belongs to the fastener field for the panel beating is connected with the section bar, and it includes screw rod and nut, and the nut is located the top of screw rod, the screw rod uses nut place one end to process in proper order as the direction that the central axis of initiating terminal edge screw rod kept away from the nut has the auto-lock section, attacks section and drilling section, wherein the auto-lock section is helicitic texture with attacking the section, its external diameter reduces gradually in the direction of keeping away from the nut in the drilling section. In view of the above technical solutions, the present application can improve the reliability of the connection pair, and has a detachable capability and a reusable function.)

1. The utility model provides a fastener with from boring, self tapping, auto-lock function, is including connecting screw rod (1) and nut (2) as an organic whole, its characterized in that: the screw rod (1) is used for taking the combination end of the screw rod and the nut (2) as the starting end, and the self-locking section (101), the attack section (102) and the drilling section (103) are sequentially processed along the central axis of the screw rod (1) in the direction away from the nut (2), wherein the drilling section (103) is provided with a tip end for forming a drilling hole at the connecting position of the multilayer plate body, and the attack section (102) guides the self-locking section (101) to enter the formed drilling hole and enables the self-locking section (101) to be connected with the multilayer plate body.

2. The fastener with self-drilling, self-tapping, self-locking function of claim 1, wherein: the self-locking section (101) is of a metric interference fit thread structure.

3. The fastener with self-drilling, self-tapping, self-locking function of claim 1, wherein: the tapping section (102) is of a triangular thread structure.

4. The fastener with self-drilling, self-tapping, self-locking function of claim 1, wherein: the nut (2) is provided with a U-shaped groove (4) at the connecting position of the nut and the screw rod (1), and the U-shaped groove (4) is an annular groove coaxial with the screw rod (1).

5. The fastener with self-drilling, self-tapping, self-locking function of claim 1, wherein: and a driving part (3) which is coaxial with the screw rod (1) is processed on the top surface of the nut (2).

6. The fastener with self-drilling, self-tapping, self-locking function of claim 5, wherein: the driving part (3) is of a cylindrical structure protruding out of the outer twelve corners of the nut (2).

7. The fastener with self-drilling, self-tapping, self-locking function of claim 1, wherein: the screw rod (1) and the screw cap (2) are made of metal materials with tensile strength larger than 1040Mpa and suitable for heat treatment.

8. The fastener with self-drilling, self-tapping, self-locking function of claim 1, wherein: the screw rod (1) and the screw cap (2) are made of medium carbon alloy steel materials.

9. The fastener with self-drilling, self-tapping, self-locking function of claim 1, wherein: the drilling section (103) gradually reduces in outer diameter and forms a tip that drills into the connection position as it extends along the central axis of the screw (1) in a direction away from the nut (2).

10. The fastener with self-drilling, self-tapping, self-locking function according to any one of claims 1 to 9, wherein: the self-locking section (101) is connected with the plurality of plate bodies at the connecting position, and the length of the attack section (102) is not less than that of the self-locking section (101).

Technical Field

The application belongs to the fastener field, and specifically relates to a fastener with self-drilling, self-tapping, self-locking function.

Background

In the process of connecting various metal plates and aluminum alloy sections of automobiles, ships, airplanes and the like, a rivet structure is usually adopted. At first, the existing rivet structure is mostly a hollow structure with a flat round head, and is made of aluminum materials or carbon steel materials with low carbon content, and the flat round structure has the problem of stress concentration, so that the connection strength is low, and loosening is easy to occur in the use process after riveting. Secondly, the existing rivet structure cannot be detached after connection, and the rivet has the technical problem of welding after an aluminum alloy section is adopted, complex welding equipment and protective gas are needed to realize welding, and besides the process complexity, the problem of hydrogen brittleness after welding exists, so that the failure risk is high.

Disclosure of Invention

The utility model aims at providing a fastener with from brill, self tapping, auto-lock function, it can improve the reliability of connecting vice, and possess the ability of dismantling and the function of using repeatedly.

In order to achieve the purpose, the method is realized by the following technical scheme:

in this application fastener with from boring, self-tapping, auto-lock function, including connecting screw rod and nut as an organic whole, the screw rod uses its combination end with the nut to process in proper order as the initiating terminal, along the central axis of screw rod in the direction of keeping away from the nut has the auto-lock section, attacks section and drilling section, wherein the drilling section has the most advanced that forms drilling in the hookup location department of multilayer plate body, attacks the section and guides in the drilling that the auto-lock section got into the formation and make and be connected from the lock section and multilayer plate body.

Further, the self-locking section in this application is metric interference fit thread structure. Metric interference fit thread structure can with attack the internal thread interference fit that the section formed, realize self-locking function.

Further, the tapping section is of a triangular thread structure. The triangular thread formation is able to enter the bore hole under rotation and to cause an internal thread to be formed in the bore hole such that the internal thread cooperates with the metric interference fit thread formation.

Further, the nut in this application has processed U type groove in its junction with the screw rod, and U type groove is the ring channel coaxial with the screw rod. The U-shaped groove is used for preventing the end face of the nut or the connecting position of the nut and the screw from interfering with the plate body near the drilled hole.

Further, the top surface of the nut is provided with a driving part which is coaxial with the screw. The effect of drive division lies in realizing that external drive arrangement drives the high-speed rotation of screw rod and nut, realizes that the drilling section bores into hookup location, attacks the section and guides the self-locking section and enter into the drilling.

Furthermore, the driving part in the present application is a cylinder structure protruding from the outer twelve corners of the nut.

Furthermore, the screw and the nut are made of metal materials with tensile strength of more than 1040MPa and suitable for heat treatment. The metal material with tensile strength and better heat treatment performance can increase the structural strength of the fastener and reduce the processing difficulty.

Further, the screw and the nut are made of medium carbon alloy steel materials.

Further, the drill section described herein has an outer diameter that tapers as it extends along the central axis of the screw away from the nut and forms a point that drills into the connection location.

Further, the length of attacking section is not less than the self-locking section, the self-locking section in this application be connected with a plurality of plate bodys of hookup location department.

Compared with the prior art, the beneficial effects of this application are:

this application improves through the structure and used material to the fastener, has effectively increased the tensile strength and the reliability of fastener, possesses the detachability moreover and the function of using repeatedly, can be better be adapted to all kinds of panel beating and aluminum alloy ex-trusions such as car, boats and ships, aircraft and be connected.

Drawings

Fig. 1 is a schematic structural diagram of the present application.

Fig. 2 is a cross-sectional view of the present application.

Fig. 3 is a diagram of a process of use of the present application.

In the figure: 1. a screw; 2. a nut; 3. a drive section; 4. a U-shaped groove.

101. A self-locking section; 102. tapping section; 103. and (6) drilling a hole section.

Detailed Description

The technical solutions described in the present application are further described below with reference to examples. It should be noted that, in the following paragraphs, possible directional terms including, but not limited to, "upper, lower, left, right, front, rear" and the like are used, and all directions are meant to correspond to the visual directions shown in the drawings of the specification, which should not be construed as limiting the scope of the present invention, and are only for facilitating the better understanding of the technical solutions described in the specification by those skilled in the art.

In the description of the following paragraphs, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances in combination with common general knowledge in the art, design specifications, standard documents, and the like.

Example 1

The utility model provides a fastener with from boring, self-tapping, auto-lock function, is including connecting screw rod 1 and nut 2 as an organic whole, and nut 2 is located screw rod 1's top, screw rod 1 uses its combination end with nut 2 to be the initiating terminal, along screw rod 1 the central axis in the direction of keeping away from nut 2 processing in proper order have auto-lock section 101, attack section 102 and drilling section 103, wherein drilling section 103 forms the drilling through the most advanced hookup location department at the multilayer plate body, attacks section 102 guide and gets into the drilling of multilayer plate body and make auto-lock section 101 be connected with the multilayer plate body.

Example 2

A fastener with self-drilling, self-tapping and self-locking functions is disclosed, wherein the self-locking section 101 is of a metric interference fit thread structure; the tapping section 102 is of a triangular thread structure; a U-shaped groove 4 is processed at the connecting position of the screw cap 2 and the screw rod 1, and the U-shaped groove 4 is an annular groove coaxial with the screw rod 1; the top surface of the nut 2 is provided with a driving part 3 which is coaxial with the screw rod 1; the driving part 3 is a cylindrical structure protruding out of the outer twelve corners of the nut 2; the screw rod 1 and the screw cap 2 are made of metal materials with tensile strength larger than 1040Mpa and suitable for heat treatment; the screw 1 and the nut 2 are made of medium carbon alloy steel; when the drilling section 103 extends along the central axis of the screw rod 1 in the direction away from the screw cap 2, the outer diameter thereof is gradually reduced to form a tip end which drills into the connecting position; the self-locking section 101 is connected with a plurality of plate bodies at the connecting position, and the length of the attack section 102 is not less than that of the self-locking section 101. The structures and the connection relationships of the rest parts are the same as those described in the above embodiments, and are not described again here for saving text.

On the basis of the above-mentioned embodiments, the following paragraphs are used to continue detailed description of the technical features involved therein and the functions and actions of the technical features in the technical solutions, so as to help those skilled in the art fully understand the technical solutions and reproduce the technical solutions.

As shown in fig. 1 and 2, the screw 1 and the nut 2 described in the present application are fixed to form an integral fastener structure. The screw 1 is provided with a self-locking section 101 for realizing a self-locking function, an attack section 102 for realizing an attack function, and a drilling section 103 for realizing a drilling function under high-speed rotation, which are arranged along the central axis of the screw 1 in a direction away from the nut 2, with the connecting end of the screw 1 and the nut 2 as a starting point. The self-locking section 101 and the tapping section 102 are both located on the outer surface of the screw rod 1, and can be respectively used for realizing self-locking function fixed external threads and tapping function external threads on the outer surface of the screw rod 1. For example, the self-locking section 101 is a metric interference fit thread and the tapping section 102 is a triangular thread. The triangular thread of the tapping section 102 is a common thread with an arc-shaped triangular cross section, and the thread surface has high hardness, so that an internal thread can be formed in a drill hole when the plate body is connected. The internal thread formed in the drilling hole by the tapping section 102 is connected with the external thread (i.e., metric interference fit thread described in the above paragraph) of the self-locking section 101, so as to realize the self-locking function of the screwed-in fastener. When the drilling section 103 extends along the central axis of the screw 1 in a direction away from the nut 2, the outer diameter of the drilling section 103 is gradually reduced until a tip is formed which can be drilled into the plate body when rotating at a high speed. Specifically, the drilling section 103 is a cone or frustum structure, which can drill a drilling hole suitable for the tapping section 102 to enter on the multilayer board body in a high-speed rotation state.

In this application, nut 2 in its the hookup location department with screw rod 1 processing have U type groove 4, U type groove 4 is used for preventing to take place to interfere between the plate body surface of hookup location and the terminal surface of nut 2 or the hookup location department of nut 2 and screw rod 1. In the present application, the nut 2 is provided at its top with a cylindrical projection coaxial with the screw 1, which constitutes the driving portion 3. The driving part 3 can be set to be a cylindrical structure with twelve outer corners so as to realize the high-speed rotation of the nut 2 and the screw 1 stably under the state of external driving.

As shown in fig. 3, in the present application, the drilling section 103 is driven by an external driver to drill into the metal plate and the aluminum profile at a speed of about 3000 rpm. Along with the drilling of drilling section 103, drilling section 103 can make panel beating and aluminium alloy form the drilling in hookup location department and the drilling internal diameter gradually increases along with the entering of drilling section 103. As the drilling section 103 continues to drill, the triangular thread of the tapping section 102 taps into the resulting borehole along with the drilling section 103. The tapping section 102 can form an internal thread inside the drill hole in the process of entering the drill hole, and the internal thread can be in interference fit with a metric interference fit thread structure of the subsequent self-locking section 101 and form self-locking. To show the structure of the U-shaped groove 4, fig. 3 shows the U-shaped groove 4 as a visible structure, and the end face of the nut 2 where the U-shaped groove 4 is located is in contact with the end face of the plate body.

In the present application, the screw 1, the nut 2 and the driving portion 3 may be made of medium carbon alloy steel. Firstly, medium carbon alloy steel has better heat treatment performance, and besides being convenient for processing, the medium carbon alloy steel can also reach tensile strength of more than 1040Mpa, and compared with the tensile strength of the common aluminum material and the common low carbon steel material adopted by the common rivet, the medium carbon alloy steel has the tensile strength of about 300-500 Mpa, which is 2-3 times of the strength of the traditional rivet. Secondly, because the intensity that the material that adopts brought promotes, can adjust the installation moment of torsion according to actual need when using to obtain the axial clamp force of ideal, can effectively solve the quality problem that traditional rivet riveting is not hard up to cause. Secondly, for the design of self-locking section 101, attack section 102, drilling section 103 structure in this application for the product has self-drilling, self tapping, auto-lock function, possesses single face connection simultaneously and fixes and can dismantle the advantage, from the manufacturing perspective, makes the product have lightweight design, can produce the product that the specification is in M3.5 ~ M6, length is in the product that varies 10 ~ 35mm, possesses advantages such as production cycle is short, the low price.

Finally, although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description of the present description is for clarity reasons only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can be appropriately combined to form other embodiments that can be understood by those skilled in the art.