A highly stable fastening connector

Abstract

This utility model provides a highly stable fastening connector, relating to the field of fastening connector technology, comprising: a fastening screw, the fastening screw containing a screw post, the screw post having an inner titanium alloy layer, the outer surface of the inner titanium alloy layer being laminated with a nickel-titanium oxide outer layer, a screw tail at the lower end of the screw post, an overflow hole on the surface of the screw tail, and an adhesive injection channel at the center of the inner titanium alloy layer, the lower end of the adhesive injection channel communicating with the overflow hole. This utility model solves the problem in the prior art where triangular structure screw fasteners require matching high-precision slots, and any processing errors or wear between the two will affect the stability of the connection.

Description

Technical Field

[0001] This utility model relates to the field of fastening connectors, specifically to a highly stable fastening connector. Background Technology

[0002] Fasteners are widely used in aerospace, automotive, high-speed rail, and machinery equipment. To improve assembly efficiency, aluminum components on current equipment are fixed using self-tapping screws, which eliminate the need for drilling holes in the aluminum material. The screws are directly driven and turned to fix the aluminum. A search revealed existing technology (publication number: CN202320549299.0) for a connector in new energy vehicles. The paper describes how "by setting a buffer section and designing the tip as a triangular end face, the triangular stability and the non-sharp end face structure ensure that the tip is not easily broken under pressure when in contact with and compressed with the aluminum material." However, the triangular screw fasteners in this existing technology require matching high-precision slots. Any machining errors or wear between the two can affect the stability of the connection. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a highly stable fastening connector is provided to solve the problem that in existing technologies, triangular screw fasteners require matching with high-precision slots, and any machining errors or wear between the two will affect the stability of the connection.

[0004] To achieve the above objectives, a highly stable fastening connector is provided, comprising: a fastening screw, wherein the fastening screw includes a screw post. The screw post has a titanium alloy inner layer inside, and a nickel-titanium alloy outer layer is laminated on the outer surface of the titanium alloy inner layer. The screw post has a screw tail at the lower end, and an overflow hole is opened on the surface of the screw tail. An injection channel is opened in the center of the titanium alloy inner layer, and the lower end of the injection channel is connected to the overflow hole.

[0005] Furthermore, the fastening screw is connected to the first disc profile and the second disc profile via the screw post and the screw tail.

[0006] Furthermore, the upper end of the screw post is fixedly connected to the screw head via a titanium alloy inner layer.

[0007] Furthermore, the upper surface of the screw head is provided with an injection port.

[0008] Furthermore, the glue injection port is connected to the glue overflow hole through the glue injection channel.

[0009] Furthermore, a sealing washer is fitted at the connection between the screw shaft and the screw head.

[0010] Furthermore, the tail section of the screw is tapered; and the outer surface of the tail section of the screw is provided with grooves.

[0011] Furthermore, the outer surface of the nickel-titanium outer layer is machined with external threads.

[0012] The beneficial effects of this utility model are as follows: the high-stability fastening connector utilizes a nickel-titanium outer layer composited with the titanium alloy inner column surface of the fastening screw. By installing the nickel-titanium outer layer of the fastening screw into the frame at a temperature below the phase transformation temperature, the fastening screw, after being heated and returning to its original state, generates a huge and constant clamping force, tightly adhering to the mounting slot. Then, by injecting adhesive into the fastening screw, the tail of the fastening screw is bonded to the profile, achieving a highly efficient and stable fastening connection. This enhances the connection fatigue strength and overall rigidity of the fastening connector, reduces the difficulty of high-precision machining, and significantly improves the connection stability of the fastening connector. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the highly stable fastening connector according to an embodiment of the present utility model.

[0014] Figure 2 This is a front cross-sectional view of the high-stability fastening connector according to an embodiment of the present invention.

[0015] Figure 3 This is a bottom view of the tail of the screw in an embodiment of the present invention.

[0016] Figure 4 This is a schematic diagram of the connection structure of the fastening screw in an embodiment of the present utility model.

[0017] In the diagram: 1. Fastening screw; 2. Screw body; 21. Inner titanium alloy layer; 22. Outer nickel-titanium alloy layer; 23. Injection channel; 3. Screw tail; 31. Overflow hole; 4. Screw head; 41. Injection port; 5. Sealing gasket; 6. First wheel profile; 7. Second wheel profile. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please refer to Figures 1 to 4 As shown, this utility model provides a highly stable fastening connector, including: a fastening screw 1, wherein the fastening screw 1 contains a screw post 2. The screw post 2 has a titanium alloy inner layer 21 inside, and a nickel-titanium alloy outer layer 22 is laminated on the outer surface of the titanium alloy inner layer 21. The screw post 2 has a screw tail 3 at the lower end, and an overflow hole 31 is opened on the surface of the screw tail 3. An injection channel 23 is opened in the center of the titanium alloy inner layer 21, and the lower end of the injection channel 23 is connected to the overflow hole 31.

[0020] When installing fastening screw 1, the fastening screw 1, which is in a contracted state below the nickel-titanium phase transition temperature, is first installed in the mounting slot of the aluminum alloy frame profile. After heating, the screw post 2 of the fastening screw 1 returns to its shape and then tightly adheres to the inner thread wall of the mounting slot, generating a huge and constant clamping force to achieve the anti-loosening effect. Then, glue is injected into the glue injection channel 23, allowing the glue to overflow from the tail 3 of the screw, so that the cured glue further bonds the fastening screw 1, achieving a highly efficient and stable fastening connection, enhancing the connection fatigue strength and overall rigidity of the fastening connection, reducing the difficulty of high-precision machining, and significantly improving the connection stability of the fastening connection.

[0021] In this embodiment, the fastening screw 1 is connected to the first disc profile 6 and the second disc profile via the screw body 2 and the screw tail 3. The upper end of the screw body 2 is fixedly connected to the screw head 4 via a titanium alloy inner layer 21. The upper surface of the screw head 4 has an injection port 41. The injection port 41 is connected to the overflow hole 31 via an injection channel 23. A sealing washer 5 is fitted at the connection between the screw body 2 and the screw head 4. The screw tail 3 has a tapered cross-section; and the outer surface of the screw tail 3 has grooves.

[0022] As a preferred embodiment, the fastening screw 1 is bonded to the profile by injecting adhesive into the injection port 41, which significantly improves the connection fatigue strength and overall rigidity. Furthermore, the cured adhesive provides sealing, vibration damping, stress distribution, and the anti-peeling properties of mechanical fasteners, ensuring the stable connection of the fastening screw 1. The sealing gasket 5, made of fluororubber, silicone rubber, and composite materials, allows the fastening screw 1 to fit tightly into the mounting slot of the profile, preventing external rainwater from seeping in.

[0023] In this embodiment, the outer surface of the nickel-titanium outer layer 22 is machined with external threads.

[0024] As a preferred implementation, the external threads on the outer surface of the Nitinol outer layer 22 are used to screw into the mounting slot of the profile. By using the shape memory alloy material of the Nitinol outer layer 22, the property of Nitinol alloy to restore its original shape under temperature changes is utilized to generate a huge and constant clamping force with the profile, ensuring the efficient, stable and tight connection of the profile.

[0025] This utility model of a high-stability fastening connector effectively solves the problem in the prior art where triangular screw fasteners require matching with high-precision slots, and where errors or wear between the two during processing can affect connection stability. It achieves efficient and stable fastening connections, enhances the connection fatigue strength and overall rigidity of the fastening connector, reduces the difficulty of high-precision processing, and significantly improves the connection stability of the fastening connector. It is suitable for high-stability fastening connectors.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-stability fastening connection, comprising: Fastening screw (1), wherein the fastening screw (1) contains a screw post (2), characterized in that: The screw post (2) is provided with a titanium alloy inner layer (21) inside, and a nickel-titanium alloy outer layer (22) is laminated on the outer surface of the titanium alloy inner layer (21). The screw post (2) is provided with a screw tail (3) at the lower end. An overflow hole (31) is provided on the surface of the screw tail (3). An injection channel (23) is provided in the center of the titanium alloy inner layer (21). The lower end of the injection channel (23) is connected to the overflow hole (31).

2. A high-stability fastening connector according to claim 1, wherein The fastening screw (1) is connected to the first disc profile (6) and the second disc profile (7) through the screw post (2) and the screw tail (3).

3. A high-stability fastening connector according to claim 1, wherein The upper end of the screw post (2) is fixedly connected to the screw head (4) through the titanium alloy inner layer (21).

4. A high-stability fastening connector according to claim 3, wherein The upper surface of the screw head (4) is provided with a glue injection port (41).

5. A high-stability fastening connection according to claim 4, characterized in that The glue injection port (41) is connected to the glue overflow hole (31) through the glue injection channel (23).

6. A high-stability fastening connector according to claim 3, wherein A sealing washer (5) is fitted at the connection between the screw shaft (2) and the screw head (4).

7. A high-stability fastening connector according to claim 1, wherein The tail portion (3) of the screw has a tapered cross section; and the outer surface of the tail portion (3) of the screw has grooves.

8. A high-stability fastening connector according to claim 1, wherein The outer surface of the nickel-titanium outer layer (22) is machined with external threads.

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