A bolt fastener

Abstract

This application discloses a bolt fastener, belonging to the field of fastening technology. The bolt fastener includes a hexagonal prism-shaped bolt head. An installation groove is formed on the upper end face of the bolt head. A threaded post is fixedly connected to the lower end of the bolt head. An extension groove is formed at the lower end of the threaded post. A rotating block is provided inside the installation groove. A threaded rod is fixedly connected to the lower end of the rotating block, and the threaded rod rotatably extends into the extension groove. Multiple sliding grooves are formed on the inner wall of the extension groove. A guide strip is fixedly connected inside the sliding groove. The rotating block drives the threaded rod to rotate, causing a moving cylinder to move upward along the extension groove. The moving block slides along the sliding groove and conforms to the inclined surface of the guide strip, slightly expanding the outer wall of the threaded post. After the expansion groove opens, the outer wall of the threaded post tightly conforms to the inner wall of the threaded hole of the workpiece, significantly enhancing the connection stability between the threaded post and the workpiece, preventing loosening, and improving stability. The structure is simple to operate, ensures stable installation, and greatly improves the practical effect of the structure.

Description

Technical Field

[0001] This application relates to the field of fastening technology, and more specifically, to a bolt fastener. Background Technology

[0002] Bolts are mechanical parts used to connect or fix two or more components. They can stably assemble components together through their own tightening action, preventing loosening or displacement during use. They are suitable for various scenarios such as mechanical manufacturing, building installation, and equipment maintenance. Different specifications and models can be selected according to the component material and stress requirements. They have both good load-bearing capacity and easy disassembly, ensuring the stability and safety of the assembled structure and providing basic connection support for the normal operation of various equipment and structures.

[0003] In practice, when connecting bolts to the threaded holes of workpieces, it is difficult to achieve a tight fit between the outer wall of the bolt and the inner wall of the threaded hole through convenient operation. After connection, loosening is likely to occur due to insufficient fit, making it difficult to ensure the connection stability between the bolt and the workpiece, which brings inconvenience to the structural stability of the assembled components. Utility Model Content

[0004] The purpose of this application is to provide a bolt fastener that solves the technical problems mentioned in the background art.

[0005] This application provides a bolt fastener, including a hexagonal prism-shaped bolt head. The upper end face of the bolt head has an installation groove. A threaded post is fixedly connected to the lower end of the bolt head. An extension groove is formed at the lower end of the threaded post. A rotating block is provided inside the installation groove. A threaded rod is fixedly connected to the lower end of the rotating block, and the threaded rod rotatably extends into the extension groove. Multiple sliding grooves are formed on the inner wall of the extension groove. A guide strip is fixedly connected inside the sliding groove. A movable cylinder is rotatably connected to the outer wall of the threaded rod via threads. Multiple movable blocks are fixedly connected to the outer wall of the movable cylinder.

[0006] Optionally, the upper end face of the rotating block is provided with a slot, and both ends of the slot extend into the mounting groove.

[0007] Optionally, a limiting groove is provided at the bottom of the inner wall of the mounting groove, and a limiting ring is fixedly connected to the bottom of the outer wall of the rotating block, with the limiting ring located in the limiting groove.

[0008] Optionally, the outer wall of the movable cylinder is in contact with the inner wall of the extension groove, and the threaded column and the threaded rod have the same thread direction.

[0009] Optionally, the end faces of the plurality of guide strips that are close to each other are inclined surfaces, the moving block is located in the groove, and the outer wall of the moving block is in contact with the outer wall of the guide strip.

[0010] Optionally, a plurality of expansion grooves are provided on the lower part of the outer wall of the threaded column, and the plurality of expansion grooves are connected to the extension grooves.

[0011] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0012] This application utilizes a rotating block to drive the threaded rod to rotate, causing the moving cylinder to move upward along the extension groove. The moving block slides along the slide groove and conforms to the inclined surface of the guide strip, slightly expanding the outer wall of the threaded column. After the expansion groove opens, the outer wall of the threaded column tightly conforms to the inner wall of the threaded hole of the workpiece, significantly enhancing the connection stability between the threaded column and the workpiece, preventing loosening, and improving stability. The structure is simple to operate, ensures stable installation, and greatly improves the practical effect of the structure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the bolt fastener disclosed in the embodiments of this application;

[0014] Figure 2 This is a cross-sectional view of the bolt fastener disclosed in the embodiments of this application;

[0015] Figure 3 This is a cross-sectional view of the threaded post of the bolt fastener disclosed in the embodiments of this application;

[0016] The following are the labels in the diagram: 1. Bolt head; 2. Mounting groove; 3. Threaded post; 4. Extension groove; 5. Rotating block; 6. Slot; 7. Threaded rod; 8. Limiting groove; 9. Limiting ring; 10. Slide groove; 11. Guide bar; 12. Moving cylinder; 13. Moving block; 14. Unfolding groove. Detailed Implementation

[0017] The present application will be further described in detail below with reference to the accompanying drawings.

[0018] Reference Figures 1-3This application provides a bolt fastener, including a hexagonal prism-shaped bolt head 1. The upper end face of the bolt head 1 has an installation groove 2. A threaded post 3 is fixedly connected to the lower end of the bolt head 1. An extension groove 4 is formed at the lower end of the threaded post 3. A rotating block 5 is provided inside the installation groove 2. A threaded rod 7 is fixedly connected to the lower end of the rotating block 5 and rotatably extends into the extension groove 4. Multiple sliding grooves 10 are formed on the inner wall of the extension groove 4. Guide strips 11 are fixedly connected inside the sliding grooves 10. A movable cylinder 12 is rotatably connected to the outer wall of the threaded rod 7 via threads. The outer wall of the movable cylinder 12 fits against the inner wall of the extension groove 4. The threaded post 3 and the threaded rod 7 have the same thread direction. Multiple movable blocks 13 are fixedly connected to the wall. The end faces of multiple guide strips 11 that are close to each other are inclined surfaces. The movable blocks 13 are located in the slide groove 10, and the outer walls of the movable blocks 13 are in contact with the outer walls of the guide strips 11. Multiple expansion grooves 14 are opened below the outer wall of the threaded column 3, and the multiple expansion grooves 14 are connected to the extension groove 4. By rotating the block 5, the threaded rod 7 is rotated, causing the movable cylinder 12 to move upward along the extension groove 4. The movable blocks 13 slide along the slide groove 10 and are in contact with the inclined surfaces of the guide strips 11, pushing the outer wall of the threaded column 3 to expand slightly. After the expansion grooves 14 are opened, the outer wall of the threaded column 3 is tightly in contact with the inner wall of the threaded hole of the workpiece, which greatly enhances the connection stability between the threaded column 3 and the workpiece, avoids loosening, and improves stability. The structure is simple to operate, ensures stable installation, and greatly improves the practical effect of the structure.

[0019] The upper end face of the rotating block 5 is provided with a slot 6, and both ends of the slot 6 extend into the mounting groove 2. During installation, the bolt head 1 can be held in place by a wrench, or a larger flathead wrench can be inserted into the mounting groove 2 of the bolt head 1. The slot 6 of the rotating block 5 and the slot 6 of the bolt head 1 can be used to easily rotate the bolt head 1 and the threaded post 3, and the threaded post 3 can be installed into the threaded hole of the workpiece, which can be adapted to different tool operation requirements.

[0020] A limiting groove 8 is provided on the lower part of the inner wall of the mounting groove 2. A limiting ring 9 is fixedly connected to the lower part of the outer wall of the rotating block 5, and the limiting ring 9 is located in the limiting groove 8. The limiting ring 9 can prevent the rotating block 5 from shifting or falling out by rotating along the limiting groove 8, thus ensuring stable rotation.

[0021] Working principle: When using bolt fasteners, first insert the threaded post 3 into the threaded hole of the workpiece, and use a wrench to hold the bolt head 1, or use a large flathead wrench to insert into the groove 6 of the rotating block 5 and the groove 6 on the bolt head 1 in the mounting groove 2 on the upper end face of the bolt head 1. Rotate the tool to drive the bolt head 1 and the threaded post 3 to rotate synchronously, and install the threaded post 3 into the threaded hole.

[0022] After securing the bolt head 1 and threaded post 3, insert a small flathead wrench into the mounting groove 2 on the upper end face of the bolt head 1. Rotate the tool to drive the rotating block 5 to rotate within the mounting groove 2. The limiting ring 9 on the lower part of the outer wall of the rotating block 5 rotates along the limiting groove 8 on the inner wall of the mounting groove 2 to prevent the rotating block 5 from shifting or coming off. When the rotating block 5 rotates, the threaded rod 7 at its lower end rotates synchronously within the extension groove 4. Since the threaded rod 7 is threadedly connected to the moving cylinder 12, and the moving block 13 on the outer wall of the moving cylinder 12 is located within the sliding groove 10 on the inner wall of the extension groove 4, the moving cylinder 12 moves upward along the inner wall of the extension groove 4.

[0023] As the moving cylinder 12 moves upward, the moving block 13 on its outer wall slides along the slide groove 10. Simultaneously, the moving block 13 moves against the inclined surface of the guide bar 11 within the slide groove 10. The moving block 13 presses against the guide bar 11, which in turn pushes the outer wall of the threaded post 3 to expand slightly away from the threaded rod 7. The unfolding groove 14 on the outer wall of the threaded post 3 opens, allowing the unfolded outer wall of the threaded post 3 to fit against the inner wall of the workpiece's threaded hole, enhancing the connection stability between the bolt and the workpiece. Once the threaded post 3 is fully unfolded and pressed against the inner wall of the workpiece's threaded hole, the tool rotation is stopped, completing the installation and fixing of the bolt fastener.

[0024] If the bolt needs to be removed, rotate the tool in the opposite direction to make the rotating block 5 and the threaded rod 7 rotate in the opposite direction. The moving cylinder 12 moves downward along the extension groove 4. The moving block 13 no longer presses against the guide bar 11. The outer wall of the threaded column 3 stops opening. The operator can then rotate the bolt head 1 and the threaded column 3 with the tool. The threaded column 3 will withdraw from the threaded hole of the workpiece until the bolt is completely removed from the workpiece, and the disassembly is completed.

[0025] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A bolt fastener comprising a hexagonal bolt head (1), characterised in that: The upper end face of the bolt head (1) is provided with an installation groove (2), the lower end of the bolt head (1) is fixedly connected with a threaded column (3), the lower end of the threaded column (3) is provided with an extension groove (4), the interior of the installation groove (2) is provided with a rotating block (5), the lower end of the rotating block (5) is fixedly connected with a threaded rod (7), and the threaded rod (7) rotates and extends into the extension groove (4). The inner wall of the extension groove (4) is provided with multiple sliding grooves (10), the interior of the sliding groove (10) is fixedly connected with a guide strip (11), the outer wall of the threaded rod (7) is rotatably connected with a movable cylinder (12) by a thread, and the outer wall of the movable cylinder (12) is fixedly connected with multiple movable blocks (13).

2. The bolt fastener of claim 1, wherein: The upper end face of the rotating block (5) is provided with a slot (6), and both ends of the slot (6) extend into the mounting groove (2).

3. The bolted fastener of claim 1, wherein: A limiting groove (8) is provided on the lower part of the inner wall of the mounting groove (2), and a limiting ring (9) is fixedly connected to the lower part of the outer wall of the rotating block (5), and the limiting ring (9) is located in the limiting groove (8).

4. The bolted fastener of claim 1, wherein: The outer wall of the movable cylinder (12) is in contact with the inner wall of the extension groove (4), and the threaded column (3) and the threaded rod (7) have the same thread direction.

5. The bolted fastener of claim 1, wherein: The end faces of the multiple guide strips (11) that are close to each other are inclined surfaces. The moving block (13) is located in the groove (10), and the outer wall of the moving block (13) is in contact with the outer wall of the guide strip (11).

6. The bolted fastener of claim 1, wherein: The threaded column (3) has multiple expansion slots (14) on its lower outer wall, and the multiple expansion slots (14) are connected to the extension slots (4).

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