Inner hexagonal screw fastener

Abstract

The utility model discloses an inner hexagonal screw fastener which comprises a tightening head, one end of the tightening head is fixedly connected with a pressing piece, the other end of the tightening head is provided with a hexagonal groove, a groove is formed in one end of the tightening head, a fastening rod is fixedly connected to the middle position of the interior of the groove, a connecting plate is arranged in the groove, and the other end of the tightening head is fixedly connected with the hexagonal groove. The surface of one side of the connecting plate is fixedly connected with a rubber sealing cylinder, the outer surface of the rubber sealing cylinder is attached to the surface of the inner wall of the groove, the rubber sealing cylinder is connected to the outer side of the fastening rod in a sleeving mode, an avoiding hole is formed in the middle of the connecting plate, and the avoiding hole is connected to one end of the fastening rod in a sliding and sleeving mode; the surface of one side of the connecting plate is fixedly connected with a magnet block, the magnet block is magnetically attracted to the upper end of the interior of the groove, one side of the magnet block is fixedly connected with a fixing head, combined sealing can be achieved after pressing and fixing, threaded positions are prevented from being rusted, disassembly and replacement are convenient, adaptability is high, and use safety is improved.

Description

A type of internal hex screw fastener Technical Field

[0001] This utility model relates to the field of fasteners, and more specifically, to an internal hexagonal screw fastener. Background Technology

[0002] Fasteners are connecting accessories that play a connecting role in a structure. They are generally used in various fields such as machinery, aviation, shipbuilding, and construction. They are characterized by being easy to manufacture, simple in structure, and convenient to carry, and are widely used in many industries.

[0003] The utility model patent with authorization announcement number CN 210660966 U discloses an internal hexagonal screw fastener, including a fastener body for connection and a tightening head for controlling the fastener body. The tightening head has a vertically formed internal hexagonal groove at the center of its upper surface. A rubber sleeve is fitted onto the outer surface of the tightening head, and a rubber groove is connected to the center of the rubber sleeve. A threaded hole is formed at the center of the inner bottom of the tightening head, and an inner vertical groove is formed at the center line of the inner bottom of the fastener body. This utility model's internal hexagonal screw fastener, through the rubber groove and rubber sleeve, protects the internal hexagonal groove when a tool is inserted into it to control the fastener, reducing the possibility of wear. Through the elastic rod and magnetic patch, a post-installation reinforcement process can be performed, improving the stability of the fastener and making it suitable for different working conditions, thus bringing better application prospects.

[0004] The aforementioned disclosed structure lacks a connecting plate that connects the clamping plate and the groove to position the rubber sealing cylinder. This not only hinders the positioning and clamping of the elastic washer, resulting in poor stability, but also fails to effectively seal and isolate the threaded installation position, making it prone to water ingress and corrosion. This affects disassembly and replacement, reduces safety and stability, and lacks adaptability, thus requiring improvement. Summary of the Invention

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide an internal hexagonal screw fastener. By setting a clamping plate on the tightening head, the clamping area can be increased, thereby clamping the positioning elastic washer and improving the stability of installation. Furthermore, a rubber sealing cylinder and a magnet block can be installed through the connecting plate inside the groove, which can be separately fitted and fixed. After clamping and fixing, they can be combined and sealed to prevent corrosion of the threaded position. It is easy to disassemble and replace, has high adaptability, and improves the safety of use.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] An internal hexagonal screw fastener includes a tightening head, one end of which is fixedly connected to a clamping plate, and the other end of which has a hexagonal groove. A groove is provided inside one end of the tightening head, and a fastening rod is fixedly connected to the center of the groove. A connecting plate is provided inside the groove, and a rubber sealing cylinder is fixedly connected to one side surface of the connecting plate. The outer surface of the rubber sealing cylinder is fitted against the inner wall surface of the groove, and the rubber sealing cylinder is sleeved on the outer side of the fastening rod. A clearance hole is provided in the center of the connecting plate, and the clearance hole is slidably fitted onto one end of the fastening rod. A magnet is fixedly connected to one side surface of the connecting plate, and the magnet is magnetically attracted to the upper end of the groove. A fixing head is fixedly connected to one side of the magnet, and the fixing head is anchored to one side of the outer surface of the connecting plate.

[0008] Furthermore, the fastening rod is an externally threaded rod and is concentric with the tightening head.

[0009] Furthermore, the connecting plate is a plastic plate and is slidably engaged inside the groove.

[0010] Furthermore, there are three magnet blocks, which are distributed circumferentially at equal angles on one side surface of the connecting plate. The magnet blocks are positioned by the connecting plate with a plastic structure. They can be positioned by heat fusion, which is convenient for processing and facilitates separate installation by magnetic adsorption positioning, which is efficient and stable.

[0011] Furthermore, the lower surface of the clamping plate is fixedly connected with limiting protrusions, which are in a double-row structure.

[0012] Furthermore, the limiting protrusions are circumferentially distributed on the lower surface of the clamping plate.

[0013] Furthermore, the interior of the hexagonal slot is provided with a vertical insertion hole, which is aligned with the corner of the hexagonal slot. Through the connection of the clamping plate and the limiting protrusion, the elastic washer can be limited, preventing eccentricity and misalignment, improving the balance of clamping and positioning, and ensuring stability. The hexagonal slot is provided with a high-quality insertion hole, which can be inserted with other tools for disassembly after wear, which is convenient for maintenance and highly adaptable.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution increases the pressing area by setting a pressing plate on the tightening head, thereby pressing the positioning elastic washer and improving the stability of the installation. Furthermore, the rubber sealing cylinder and the magnet block are installed by the connecting plate inside the groove, which can be fixed separately. After being pressed and fixed, they can be combined and sealed to avoid corrosion of the threaded position. It is easy to disassemble and replace, has high adaptability, and improves the safety of use.

[0016] (2) The magnetic blocks are positioned by connecting plates with plastic structure, which can be hot-melted for positioning, making it easy to process and facilitates magnetic adsorption positioning for separate installation, which is efficient and stable.

[0017] (3) The elastic washer can be limited by the clamping plate and the limiting protrusion, which can prevent the eccentric misalignment of the clamping and positioning, improve the balance of clamping and positioning, and ensure stability. The hexagonal groove is equipped with a quality insertion hole, which can be inserted into other tools for disassembly after wear, which is convenient for maintenance and highly adaptable. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 is a schematic diagram of the planar structure of this utility model;

[0020] Figure 3 is an enlarged view of point A where the connecting plate is connected in Figure 2 of this utility model;

[0021] Figure 4 is a schematic diagram of the tightening head of this utility model;

[0022] Figure 5 is a schematic diagram of the connecting plate of this utility model.

[0023] Explanation of the labels in the diagram:

[0024] 1 Tightening head, 11 Pressure plate, 12 Hexagonal groove, 13 Groove, 14 Fastening rod, 15 Connecting plate, 16 Rubber sealing cylinder, 17 Clearance hole, 18 Magnet block, 19 Fixing head, 2 Limiting protrusion, 21 Vertical insertion hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Please refer to Figures 1, 3, and 5. A type of internal hexagonal screw fastener includes a tightening head 1. One end of the tightening head 1 is fixedly connected to a clamping plate 11, and the other end of the tightening head 1 has a hexagonal groove 12. A groove 13 is provided inside one end of the tightening head 1. A fastening rod 14 is fixedly connected to the middle position inside the groove 13. A connecting plate 15 is provided inside the groove 13, allowing for separate adjustment and installation, facilitating tightening after connection and fixation, and offering high adaptability. A rubber sealing cylinder 16 is fixedly connected to one side surface of the connecting plate 15. The outer surface of the rubber sealing cylinder 16 fits against the inner wall surface of the groove 13, and the rubber sealing cylinder 16 is sleeved on the outer side of the fastening rod 14. A clearance hole 17 is provided in the middle position of the connecting plate 15, which can be fitted onto the fastening rod 14 for easy installation and fixation, avoiding interference. The clearance hole 17 is slidably sleeved onto one end of the fastening rod 14. A magnet block 18 is fixedly connected to one side surface of the connecting plate 15. The magnet 18 is magnetically adsorbed onto the upper part of the groove 13. A fixing head 19 is fixedly connected to one side of the magnet 18 and anchored to the outer surface of the connecting plate 15. In use, the connecting plate 15 can be positioned inside the groove 13, thereby positioning the rubber sealing cylinder 16 inside the groove 13. After the landscape 14 is threaded into the threaded hole, the rubber sealing cylinder 16 can be pressed. On the one hand, it can fit into the threaded hole port for sealing, and on the other hand, it can fit into the inner surface of the groove 13 for sealing and positioning, preventing moisture from entering the threaded hole and corroding the threads, improving the stability of use, and facilitating subsequent disassembly and replacement. It has high adaptability. When the elastic washer is put on the fastening rod 14, it can be positioned by aligning with the double row of limiting protrusions 2 to ensure that the center line is consistent. The thickness of the limiting protrusions 2 is less than the thickness of the elastic washer to avoid interference, ensure the stability of the pressing and fixing, and facilitate the fastening use.

[0027] Please refer to Figures 1 and 2. The fastening rod 14 is an externally threaded rod and is concentric with the tightening head 1. The connecting plate 15 is a plastic plate and is slidably snapped into the inside of the groove 13. There are three magnet blocks 18, which are distributed circumferentially at equal angles on one side surface of the connecting plate 15. The magnet blocks are positioned by the plastic connecting plate, which can be hot-melted for positioning, which is convenient for processing and facilitates magnetic adsorption positioning for separate installation, which is efficient and stable.

[0028] Please refer to Figures 1 and 4. The lower surface of the clamping plate 11 is fixedly connected to the limiting protrusions 2. The limiting protrusions 2 have a double-row structure and are distributed circumferentially on the lower surface of the clamping plate 11. The interior of the hexagonal groove 12 is provided with a vertical insertion hole 21, which is aligned with the corner position of the hexagonal groove 12. By connecting the clamping plate to the limiting protrusions, the elastic washer can be limited, preventing eccentric misalignment and improving the balance of clamping and positioning, thus ensuring stability. The hexagonal groove is provided with a high-quality insertion hole, which can be inserted into other tools for disassembly after wear, facilitating maintenance and high adaptability. During normal use, a hexagonal wrench can be inserted into the hexagonal groove 12 to rotate the tightening head 1 and the fastening rod 14 for easy installation and fastening. However, if the interior of the hexagonal groove 12 becomes slippery after wear, a rod can be inserted into the vertical insertion hole 21 and then rotated to facilitate disassembly, facilitating replacement and maintenance, and providing high adaptability.

[0029] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A type of internal hexagonal screw fastener, comprising a tightening head (1), one end of which is fixedly connected to a clamping plate (11), and the other end of which is provided with a hexagonal groove (12), characterized in that: The tightening head (1) has a groove (13) inside one end. A fastening rod (14) is fixedly connected to the middle position inside the groove (13). A connecting plate (15) is provided inside the groove (13). A rubber sealing cylinder (16) is fixedly connected to one side surface of the connecting plate (15). The outer surface of the rubber sealing cylinder (16) is attached to the inner wall surface of the groove (13). The rubber sealing cylinder (16) is sleeved on the outer side of the fastening rod (14). An avoidance hole (17) is provided in the middle position of the connecting plate (15). The avoidance hole (17) is slidably sleeved on one end of the fastening rod (14). A magnet block (18) is fixedly connected to one side surface of the connecting plate (15). The magnet block (18) is magnetically attracted to the upper end inside the groove (13). A fixing head (19) is fixedly connected to one side of the magnet block (18). The fixing head (19) is anchored to one side of the outer surface of the connecting plate (15).

2. The internal hexagonal screw fastener according to claim 1, characterized in that: The fastening rod (14) is an externally threaded rod and is concentric with the tightening head (1).

3. The internal hexagonal screw fastener according to claim 1, characterized in that: The connecting plate (15) is a plastic plate and is slidably engaged inside the groove (13).

4. The internal hexagonal screw fastener according to claim 1, characterized in that: There are three magnet blocks (18), which are distributed in equal-angled circles on one side surface of the connecting plate (15).

5. The internal hexagonal screw fastener according to claim 1, characterized in that: The lower surface of the clamping plate (11) is fixedly connected with a limiting protrusion (2), which is a double-row structure.

6. The internal hexagonal screw fastener according to claim 5, characterized in that: The limiting protrusions (2) are circumferentially distributed on the lower surface of the clamping plate (11).

7. The internal hexagonal screw fastener according to claim 1, characterized in that: The interior of the hexagonal slot (12) is provided with a vertical insertion hole (21), which is aligned with the corner of the hexagonal slot (12).

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