Self-tightening hole pre-buried nut

Abstract

The application discloses a self-tightening hole pre-buried nut, which belongs to the technical field of nuts and is characterized in that a self-tightening thread is coiled on the outer side of a nut cap, a screw rod is installed at one end of a nut body, the screw rod and the nut cap are respectively provided with a connecting thread one and a connecting thread two, the nut body is rotationally connected by the screw rod, the connecting thread one and the connecting thread two, the connecting thread one and the self-tightening thread are reverse rotation structures, a structure to be fixed is attached to the outer side end face of the nut cap so that the two are tightly attached, then, a connecting piece is inserted into the nut cap, the connecting thread one on the connecting piece and the connecting thread two on the inner side of the nut cap are matched with each other to be screwed and locked, when the connecting piece travels to the bottom end position of the nut cap in the screwing and clamping process, the nut cap is synchronously driven to further rotate, the nut cap and the wall body or the base body are more tightly attached and engaged, and thus the self-tightening reinforcing function is realized, and the firmness and stability of the overall connection are effectively improved.

Description

Technical Field

[0001] This invention relates to a pre-embedded nut, and more particularly to a self-tightening pre-embedded nut with a hole, belonging to the field of nut technology. Background Technology

[0002] Self-tightening pre-embedded nuts are pre-embedded internal thread fasteners designed specifically for thin plates / sheet metal. They mechanically lock themselves into the holes of the sheet metal through axial pressure, forming a permanent, high-strength threaded connection point without the need for welding, tapping, or additional anti-loosening components.

[0003] The existing self-tightening pre-embedded nuts with holes have a problem during use: because the surface of the nut is smooth, it is not convenient to perform a self-tightening operation during the pre-embedding process.

[0004] To overcome the problem that "the self-tightening pre-embedded nuts in the existing technology are not easy to self-tighten during the pre-embedding process due to their smooth surface", a self-tightening pre-embedded nut with holes is needed for optimization and improvement. Summary of the Invention

[0005] The main objective of this invention is to overcome the problem that "in the prior art, the self-tightening pre-embedded nut with a hole is not easy to self-tighten during the pre-embedding process due to its smooth surface," and to provide a self-tightening pre-embedded nut with a hole that achieves the following functions:

[0006] First, the nut is pre-embedded and fixed inside the pre-set hole by screwing it in. After the nut is installed in place, the structural component to be fixed is attached to the outer end face of the nut so that the two fit tightly together.

[0007] Then, insert the connector into the nut and tighten it by interlocking the connecting thread one on the connector with the connecting thread two on the inside of the nut.

[0008] During the tightening and clamping process, when the connector moves to the bottom of the nut, it will simultaneously drive the nut to rotate further, so that the nut and the wall or base form a tighter fit and engagement, thereby achieving the function of self-tightening reinforcement and effectively improving the overall connection's firmness and stability.

[0009] The objective of this invention can be achieved by adopting the following technical solution:

[0010] A self-tightening pre-embedded nut with a hole includes a nut body for connection, the nut body being inserted into a nut.

[0011] The outer side of the nut is wound with a self-tightening thread, and a screw is installed at one end of the nut body. An elastic expansion plate is provided in the lower half of the nut. The inner diameter of the elastic expansion plate in the lower half is smaller than the outer diameter of the screw, and the inner surface of the elastic expansion plate is provided with long serrations. The upper half of the elastic expansion plate is embedded in the nut. The upper half of the elastic expansion plate has a regular hexagonal cross-section and its inner diameter is larger than the outer diameter of the screw.

[0012] Preferably, the screw and the nut are respectively provided with connecting thread one and connecting thread two coiled inside.

[0013] Preferably, the nut body is rotatably connected by a screw, a first connecting thread, and a second connecting thread.

[0014] Preferably, the connecting thread and the self-tightening thread are of opposite rotational structure.

[0015] Preferably, the rotation of the nut body causes the self-tightening thread to rotate and tighten itself.

[0016] Preferably, the self-tightening thread on the nut has an outward convex structure.

[0017] Beneficial technical effects of the present invention:

[0018] The present invention provides a self-tightening hole pre-embedded nut. First, the nut is pre-embedded and fixed inside the preset hole by screwing. After the nut is installed in place, the structural component to be fixed is attached to the outer end face of the nut so that the two are tightly attached.

[0019] Then, insert the connector into the nut and tighten it by interlocking the connecting thread one on the connector with the connecting thread two on the inside of the nut.

[0020] During the tightening and clamping process, when the connector moves to the bottom of the nut, it will simultaneously drive the nut to rotate further, making the nut fit and engage more tightly with the wall or base. At the same time, the screw will cause the elastic expansion plate to spring open, and the elastic expansion plate will press the long serrations onto the surface of the screw to prevent the screw from loosening, thereby achieving the function of self-tightening and reinforcement, effectively improving the overall strength and stability of the connection. Attached Figure Description

[0021] Figure 1 This is an exploded three-dimensional structural diagram of a preferred embodiment of a self-tightening hole-embedded nut according to the present invention;

[0022] Figure 2 This is a schematic diagram of a screw structure according to a preferred embodiment of a self-tightening pre-embedded nut with a hole according to the present invention;

[0023] Figure 3 This is a schematic diagram of a screw structure according to a preferred embodiment of a self-tightening pre-embedded nut with a hole according to the present invention;

[0024] Figure 4 This is a schematic cross-sectional view of a nut according to a preferred embodiment of a self-tightening pre-embedded nut with a hole according to the present invention.

[0025] In the diagram: 1. Nut body; 101. Screw; 102. Connecting thread one;

[0026] 2. Nut; 201. Self-tightening thread; 202. Connecting thread two. Detailed Implementation

[0027] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0028] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0029] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0030] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0031] In this application, 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 actual quantity, hierarchy or order relationship between these entities or operations.

[0032] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0033] Similar to the interpretation in the Patent Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also interpreted in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0034] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0035] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0036] like Figure 1 , Figure 2 and Figure 3 , Figure 4 As shown, this embodiment provides a self-tightening hole-embedded nut, including a nut body 1 for connection, wherein the nut body 1 is inserted into a nut 2;

[0037] The outer side of the nut 2 is wound with a self-tightening thread 201. A screw 101 is installed at one end of the nut body 1. An elastic expansion piece 3 is provided in the lower half of the nut 2. The inner diameter of the spring piece 301 in the lower half of the elastic expansion piece 3 is smaller than the outer diameter of the screw 101, and the inner surface of the spring piece 301 is provided with long serrations 302. The upper half of the elastic expansion piece 3 is embedded in the nut 2. The upper half of the elastic expansion piece 3 has a regular hexagonal cross-section and an inner diameter larger than the outer diameter of the screw 101. The upper half of the elastic expansion piece 3 achieves an interference fit by pressing it in through a hexagonal hole of the same size opened in the nut 2. Multiple spring pieces 301 are arranged in a circle around the upper half of the elastic expansion piece 3, typically more than 10. There are gaps between the spring pieces 301. Each spring piece 301 is a long strip extending along the axis of the nut 2, with its center bent inwards so that its inner diameter is smaller than the diameter of the screw. When the screw is screwed in, it comes into contact with the spring piece 301, which presses against the screw surface. Because the inner surface of the spring piece 301 has long serrations 302, these serrations press against the screw surface. These serrations have a triangular cross-section, and their length also extends along the axis of the nut 2. Thus, the apex of the triangular serration 302 presses against the screw surface. After the screw is tightened, the triangular apex presses against the screw surface for a prolonged period, creating a pit and greatly increasing friction, making the screw less prone to loosening.

[0038] The screw 101 and the nut 2 are respectively provided with connecting thread 102 and connecting thread 202.

[0039] The nut body 1 is rotatably connected by a screw 101, a first connecting thread 102, and a second connecting thread 202.

[0040] The connecting thread 102 and the self-tightening thread 201 are reverse-rotating structures.

[0041] The rotation of the nut body 1 causes the self-tightening thread 201 to rotate and tighten itself.

[0042] The self-tightening thread 201 on the nut 2 has an outward convex structure.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, first, the nut 2 is pre-embedded and fixed inside the preset hole by screwing. After the nut 2 is installed in place, the structural component to be fixed is attached to the outer end face of the nut 2 so that the two fit tightly together.

[0044] Then, insert the connector 1 into the nut 2, and tighten it by interlocking the connecting thread 102 on the connector 1 with the connecting thread 202 on the inside of the nut 2.

[0045] During the tightening and clamping process, when the connector 1 moves to the bottom of the nut 2, it will simultaneously drive the nut 2 to generate a further rotational tendency, so that the nut 2 and the wall or base form a tighter fit and engagement, thereby achieving the function of self-tightening reinforcement and effectively improving the overall connection's firmness and stability.

[0046] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A self-tightening pre-embedded nut with a hole, comprising a nut body (1) for connection, wherein the nut body (1) is inserted into a nut (2); Its features are: The outer side of the nut (2) is wound with a self-tightening thread (201). One end of the nut body (1) is equipped with a screw (101). The lower half of the nut (2) is provided with an elastic expansion plate (3). The inner diameter of the spring plate (301) in the lower half of the elastic expansion plate (3) is smaller than the outer diameter of the screw (101), and the inner surface of the spring plate (301) is provided with long serrations (302). The upper half of the elastic expansion plate (3) is embedded in the nut (2). The upper half of the elastic expansion plate (3) has a regular hexagonal cross section and its inner diameter is larger than the outer diameter of the screw (101).

2. The self-tightening pre-embedded nut with a hole according to claim 1, characterized in that: The screw (101) and nut (2) are respectively provided with connecting thread one (102) and connecting thread two (202).

3. The self-tightening pre-embedded nut with a hole according to claim 2, characterized in that: The nut body (1) is rotatedly connected by a screw (101), a connecting thread one (102), and a connecting thread two (202).

4. The self-tightening pre-embedded nut with a hole according to claim 3, characterized in that: The connecting thread (102) and the self-tightening thread (201) are reverse rotating structures.

5. A self-tightening pre-embedded nut with a hole according to claim 4, characterized in that: The rotation of the nut body (1) drives the self-tightening thread (201) to rotate and tighten itself.

6. A self-tightening pre-embedded nut with a hole according to claim 5, characterized in that: The self-tightening thread (201) on the nut (2) is an outwardly convex structure.

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