An embedded nut

Abstract

This utility model discloses an embedded nut, including an embedded nut body. An external thread is fixedly provided on the outer ring surface of the embedded nut body. A notch is formed on the embedded nut body, and an expansion seat is provided on one side of the notch. A positioning seat is fixedly provided at the bottom of the expansion seat, and a force-bearing skirt is fixedly provided at the top of the embedded nut body. An internal thread is formed on the inner ring surface of the embedded nut body. This embedded nut avoids the problem of traditional nuts easily loosening and prevents the embedded nut body from easily falling off with increasing use. The expansion structure formed by the combination of three sets of expansion seats can adapt to wood of different densities. The tightening force can be controlled by adjusting the bolt insertion depth, enhancing its applicability. The external thread embedded in the wood forms an anchoring effect, maintaining stability even under vibration or stress environments.

Description

Technical Field

[0001] This utility model relates to the field of fasteners, specifically an embedded nut. Background Technology

[0002] A nut is a fastener that is screwed onto a bolt or threaded rod to secure a fastener. It's an essential component in all manufacturing machinery. Based on the material, nuts are categorized into several types, including carbon steel, stainless steel, and non-ferrous metals. Nuts have a wide range of applications. An embedded nut is one type of nut. However, existing embedded nuts have a limitation: the nut body and the mounting sleeve are integrated, and the mounting sleeve cannot be disassembled or replaced.

[0003] To solve the above problems, after searching, Chinese Patent No. CN222542841U was found, which discloses an embedded nut. The nut body is covered with an installation sleeve. A disassembly and assembly assembly is provided between the nut body and the installation sleeve. The disassembly and assembly assembly includes a limiting ring groove formed at the bottom of the outer surface of the installation sleeve. A rubber ring is fitted inside the limiting ring groove. A connecting pin is fixed at an equal angle on the inner surface of the rubber ring.

[0004] While the aforementioned device, through its designed disassembly and assembly components, facilitates the modification of the mounting sleeve and nut body into a detachable form, allowing workers to replace the mounting sleeve with a flat or threaded outer surface according to actual installation needs, making operation convenient and quick, in actual use, the embedded nut, a connector that achieves thread reinforcement by embedding it into a pre-drilled hole in the object, is widely used in connection scenarios involving low-strength substrates such as plastics, wood, and thin metals. However, after the embedded nut is screwed into the pre-drilled hole in the object, as the usage time increases, if the diameter of the pre-drilled hole is too large and exceeds the design tolerance, although it can be temporarily fixed during installation through interference fit, under long-term stress, the substrate cannot provide sufficient clamping force, and the gap will gradually widen over time; the embedded nut is also prone to falling off, leading to connection failure. Utility Model Content

[0005] The purpose of this invention is to provide an embedded nut to solve the defects mentioned in the background art.

[0006] To achieve the above objectives, an embedded nut is provided, comprising an embedded nut body, an external thread fixedly provided on the outer ring surface of the embedded nut body, a notch provided on the embedded nut body, an external expansion seat provided on one side of the notch, a positioning seat fixedly provided at the bottom of the external expansion seat, a force-bearing skirt fixedly provided at the top of the embedded nut body, and an internal thread provided on the inner ring surface of the embedded nut body.

[0007] Furthermore, a circular force-bearing skirt is fixedly provided on the top of the embedded nut body. The cross-section of the force-bearing skirt is an isosceles trapezoid, and a force-bearing opening is provided inside the force-bearing skirt. The force-bearing opening is rectangular.

[0008] Furthermore, three sets of notches are provided on the bottom outer side of the embedded nut body, with the distance between adjacent sets of notches being consistent, and the notches being U-shaped.

[0009] Furthermore, three sets of external expansion seats are evenly arranged at the bottom of the embedded nut body, and adjacent sets of external expansion seats are isolated by notches.

[0010] Furthermore, each of the three sets of external expansion seats is fixedly provided with a positioning seat at its bottom. The three sets of positioning seats are centrally symmetrical about the central axis of the embedded nut body, and the positioning seats are inclined.

[0011] Furthermore, the three sets of positioning seats are combined together to form an embedded positioning platform, which is conical in shape.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This solution uses a fixed bolt to rotate downwards and compress three sets of expansion seats, causing them to expand outwards synchronously. The external threads on the outer side embed into the wood, forming a multi-point, uniform mechanical engagement from the inside, significantly improving the connection strength between the nut and the wood. This avoids the problem of traditional nuts easily loosening and prevents the embedded nut body from easily falling off over time. The expansion structure formed by the combination of the three sets of expansion seats can adapt to woods of different densities. The tightening force can be controlled by adjusting the bolt screwing depth, enhancing applicability. The external threads embedded in the wood create an anchoring effect, maintaining stability even under vibration or stress environments.

[0014] 2. This solution uses three sets of positioning seats to form a conical positioning platform fixed at the bottom of the embedded nut body. The conical positioning platform can quickly position and insert the embedded nut body into the drilled hole in the wood. The inclined surface of the conical positioning platform can guide the embedded nut to quickly align with the drilled hole in the wood. Initial insertion and positioning can be achieved without repeated adjustments, which greatly simplifies the alignment steps during installation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the nut body embedded in the structure of this utility model;

[0016] Figure 2 This is a bottom view of the nut body embedded in the structure of this utility model;

[0017] Figure 3 This is a side view of the nut body embedded in the structure of this utility model;

[0018] Figure 4 This is a top view of the nut body embedded in the structure of this utility model;

[0019] Figure 5 This is a cross-sectional view of the nut body embedded in the structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the structural positioning seat and its connection structure of this utility model.

[0021] The following are the labels in the diagram: 1. Embedded nut body; 2. External thread; 3. Notch; 4. External expansion seat; 5. Positioning seat; 6. Force-bearing skirt seat; 7. Force-bearing port; 8. Internal thread. Detailed Implementation

[0022] Please see Figure 1-6 This utility model provides an embedded nut, including an embedded nut body 1, an external thread 2 fixedly provided on the outer ring surface of the embedded nut body 1, a notch 3 opened on the embedded nut body 1, an external expansion seat 4 provided on one side of the notch 3, a positioning seat 5 fixedly provided at the bottom of the external expansion seat 4, a force-bearing skirt seat 6 fixedly provided at the top of the embedded nut body 1, and an internal thread 8 opened on the inner ring surface of the embedded nut body 1.

[0023] Working principle: When the embedded nut body 1 is used in actual use, taking the need to fix two pieces of wood together using the embedded nut body 1 as an example, a hole is pre-drilled in the wood board A, and the positioning seat 5 at the bottom of the embedded nut body 1 is inserted into the drilled hole. The end of the tool is inserted into the force-bearing port 7. The embedded nut body 1 is screwed into the drilled hole through the external thread 2 on the outside. The through hole of the wood board B is aligned with the embedded nut body 1 of the wood board A. After the bolt passes through the through hole of the wood board B, it is screwed into the internal thread 8 inside the embedded nut body 1. As the bolt is tightened, its head presses against the wood board B, and the engagement with the thread of the embedded nut body 1 generates axial tension, which tightly presses and fixes the two wood boards together.

[0024] Furthermore, a circular force-bearing skirt 6 is fixedly provided on the top of the embedded nut body 1. The cross-section of the force-bearing skirt 6 is an isosceles trapezoid, and a force-bearing opening 7 is provided inside the force-bearing skirt 6. The force-bearing opening 7 is rectangular.

[0025] Three sets of notches 3 are provided on the bottom outer side of the embedded nut body 1. The distance between two adjacent sets of notches 3 is the same, and the notches 3 are in the shape of "U".

[0026] Three sets of external expansion seats 4 are evenly arranged at the bottom of the embedded nut body 1, and adjacent sets of external expansion seats 4 are isolated by a notch 3.

[0027] The bottom of each of the three sets of external expansion seats 4 is fixedly provided with a positioning seat 5. The three sets of positioning seats 5 are centrally symmetrical about the central axis of the embedded nut body 1, and the positioning seats 5 are inclined.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown: Three sets of expansion seats 4 are evenly arranged at the bottom of the embedded nut body 1. The fixing bolt is screwed into the internal thread 8. As the fixing bolt continues to rotate downward, when the fixing bolt is screwed into the internal thread 8 on the inner wall of the expansion seat 4, the three sets of expansion seats 4 are squeezed and move outward simultaneously. This causes the external threads 2 on the outer side of the three sets of expansion seats 4 to embed into the wood. By rotating the fixing bolt downward, the three sets of expansion seats 4 are squeezed outward simultaneously, and their external threads 2 are embedded in the wood. This can form a multi-point, uniform mechanical engagement from the inside, greatly improving the connection strength between the nut and the wood, avoiding the problem of traditional nuts being easy to loosen, and preventing the wood from becoming loose with use. Over time, the embedded nut body 1 is prone to falling off; the expansion structure formed by the combination of three sets of expansion seats 4 can adapt to woods of different densities, and the expansion force can be controlled by adjusting the screw-in depth of the bolt, thus enhancing its applicability; the external thread 2 is embedded in the wood to form an anchoring effect, which can maintain stability even under vibration or stress environment, and its pull-out resistance and torsional resistance are significantly better than ordinary embedded methods; no glue is needed during installation, and fixation can be completed by mechanical expansion alone, which is convenient to operate and can be disassembled, making it easy to adjust or maintain later; the even distribution of expansion seats 4 ensures force balance, reduces local stress concentration in the wood, and reduces the risk of cracking, which is especially suitable for connecting softwood or thinner wood;

[0029] Three sets of expansion seats 4 are evenly distributed at the bottom of the nut body, and are symmetrical in structure, which can ensure consistency under force. Secondly, when the fixing bolt is rotated downward and screwed into the internal thread 8 on the inner wall of the expansion seat 4, the radial compressive force generated by the bolt on the three sets of expansion seats 4 is the same in magnitude and direction is outward. In addition, the wood itself has a certain deformable space, which can provide conditions for the movement of the expansion seats 4 under the action of external force. Therefore, under the combined action of symmetrical structure and uniform compressive force, the three sets of expansion seats 4 will move outward synchronously, realizing the embedding and fixing of the external thread 2 and the wood.

[0030] Furthermore, the three sets of positioning seats 5 are combined together to form an embedded positioning platform, which is conical in shape.

[0031] like Figure 4 , Figure 5 and Figure 6As shown: Three sets of positioning seats 5 are combined to form a conical positioning platform fixed at the bottom of the embedded nut body 1. The conical positioning platform allows the embedded nut body 1 to be quickly positioned and inserted into the drilled hole in the wood. The inclined surface of the conical positioning platform can guide the embedded nut to quickly align with the drilled hole in the wood. Initial insertion and positioning can be achieved without repeated adjustments, which greatly simplifies the alignment steps during installation. Especially in batch assembly or single-handed operation scenarios, it can significantly reduce positioning time. At the same time, the conical structure will automatically correct the angle during insertion to ensure that the embedded nut and the drilled hole remain coaxial, avoiding unstable installation or wood cracking due to tilting. This lays a precise foundation for the uniform expansion and connection fixation of the subsequent expansion seat 4.

Claims

1. An embedded nut, comprising an embedded nut body (1), characterized in that: An external thread (2) is fixedly provided on the outer ring surface of the embedded nut body (1). A notch (3) is provided on the embedded nut body (1). An external expansion seat (4) is provided on one side of the notch (3). A positioning seat (5) is fixedly provided at the bottom of the external expansion seat (4). A force-bearing skirt seat (6) is fixedly provided at the top of the embedded nut body (1). An internal thread (8) is provided on the inner ring surface of the embedded nut body (1).

2. The embedded nut according to claim 1, characterized in that: The top of the embedded nut body (1) is fixedly provided with a circular force-bearing skirt (6). The cross-section of the force-bearing skirt (6) is an isosceles trapezoid. The inside of the force-bearing skirt (6) is provided with a force-bearing opening (7), which is rectangular.

3. An embedded nut according to claim 2, characterized in that: The notch (3) is provided in three sets on the bottom outer side of the embedded nut body (1), and the distance between two adjacent sets of notches (3) is consistent. The notch (3) is U-shaped.

4. An embedded nut according to claim 3, characterized in that: The bottom of the embedded nut body (1) is evenly provided with three sets of external expansion seats (4), and adjacent sets of external expansion seats (4) are isolated by a notch (3).

5. An embedded nut according to claim 4, characterized in that: The bottom of each of the three sets of external expansion seats (4) is fixedly provided with a positioning seat (5). The three sets of positioning seats (5) are centrally symmetrical about the central axis of the embedded nut body (1). The positioning seats (5) are inclined.

6. An embedded nut according to claim 5, characterized in that: The three sets of positioning seats (5) are combined together to form an embedded positioning platform, which is conical in shape.

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