Highly efficient fatigue-resistant bolts

Abstract

This utility model discloses a high-efficiency fatigue-resistant bolt, including a threaded post with an external thread. The threaded post has a round seat on its upper surface and a hexagonal protrusion on its upper surface. A hexagonal concave sleeve is threadedly connected to the outer surface of the threaded post. By connecting the threaded post to the hexagonal concave sleeve via threads, and then tightening the hexagonal concave sleeve, a reverse tensile force can be generated on the threaded post. The threads are tightly and firmly pressed together, making it less prone to stripping or loosening. This improves fatigue resistance, and the structure is relatively simple, making it suitable for mass production.

Description

Technical Field

[0001] This utility model relates to the field of high-efficiency fatigue-resistant bolts, and more specifically, to high-efficiency fatigue-resistant bolts. Background Technology

[0002] Bolts are essential parts in daily life and industrial production. They are widely used in electronic products, mechanical products, digital products, power equipment, electromechanical products, ships, vehicles, water conservancy projects, and even chemical experiments. For example, in power equipment, high fatigue resistance bolts have high fatigue resistance and can provide sufficient tightening axial force.

[0003] Existing high fatigue-resistant bolts operate in environments with frequent vibrations, which can easily affect the bolts used for fastening, causing loosening between the bolt and nut, which in turn can lead to equipment loosening and potential danger. Therefore, this utility model proposes a high fatigue-resistant bolt. In existing patents, such as the authorized publication number CN217814460U, this utility model relates to the field of bolt technology and proposes a high fatigue-resistant bolt, including a stud, a nut, and a bolt cap. The bottom of the bolt cap has a hexagonal prism, and the bottom end of the hexagonal prism is fixedly connected to the stud via a transition section. The nut is threaded onto the shank wall of the stud. A hexagonal cylindrical column is slidably fitted onto the outer wall of the hexagonal prism. The top and bottom ends of the clamping lip are respectively provided with a clamping lip and a force-bearing lip. A limiting collar is fitted onto the outer wall of the nut. A sliding structure is slidably fitted onto the outer wall of the hexagonal cylindrical column located between the clamping lip and the force-bearing lip. The above technical solution solves the problem that in the existing technology, when high fatigue-resistant bolts are used in transmission line towers, the power equipment is affected by strong winds and operates in an environment of frequent vibration. The bolts used for fastening are easily affected by this, causing the bolts and nuts to loosen, which in turn affects the stable operation of the power equipment.

[0004] The aforementioned patent employs a complex concave-convex structure with an external sliding mechanism and an edge arc-shaped protrusion structure. Its mechanical structure is complex, making mass production impossible, and the processing technology is cumbersome and difficult to implement. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a high-efficiency fatigue-resistant bolt. By connecting the threaded post to a hexagonal recess structure through a threaded connection, and then twisting the hexagonal recess again after locking, a reverse pulling force can be generated on the threaded post. After mutual compression, they are tightly and firmly pressed together, making it less prone to stripping and loosening. The fatigue resistance is improved, and the structure is relatively simple, making it suitable for mass production.

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

[0007] A high-efficiency fatigue-resistant bolt includes a threaded post with an external thread. The upper surface of the threaded post has a round seat, and the upper surface of the round seat has a hexagonal boss. The outer surface of the threaded post is connected to a hexagonal recess by threads. By connecting the threaded post to the hexagonal recess by threads, and tightening it, the hexagonal recess can be twisted again to generate a reverse tensile force on the threaded post. The mutual compression results in a tight and firm connection, which is not easy to slip or loosen. The fatigue resistance is improved, and the structure is relatively simple, making it suitable for mass production.

[0008] Furthermore, the surface of the hexagonal recess is provided with a circular cavity and a threaded hole.

[0009] Furthermore, the inner surface of the hexagonal concave sleeve at the circular cavity is fitted onto the outer surface of the circular base.

[0010] Furthermore, the inner surface of the threaded hole of the hexagonal recess is connected to the outer surface of the threaded post by a thread.

[0011] Furthermore, a hexagonal groove is formed on the upper surface of the hexagonal protrusion.

[0012] Furthermore, the lower outer surface of the threaded post is provided with a circumferential chamfer.

[0013] Furthermore, the outer surface of the circular seat is tightly fitted to the inner surface of the hexagonal concave cavity (the circular seat and the circular cavity can fit tightly to each other without gaps, the fit is stable, and there will be no shaking).

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

[0015] (1) By connecting the threaded column to the hexagonal recess structure through the threaded column, and then twisting the hexagonal recess again after locking, the threaded column can be subjected to a reverse pull force. After mutual compression, they are tightly and firmly pressed together. They are not easy to slip or loosen, thus improving fatigue resistance. The structure is relatively simple and suitable for mass production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram showing the distribution of the threaded column, round seat, and hexagonal protrusion of this utility model;

[0018] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the hexagonal concave sleeve of this utility model.

[0020] Explanation of the labels in the diagram:

[0021] 1. Threaded post, 2. Round seat, 3. Hexagonal recessed seat, 4. Hexagonal recessed sleeve, 40. Round cavity, 41. Threaded hole, 30. Hexagonal groove. Detailed Implementation

[0022] 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.

[0023] Example 1: Please refer to Figure 1-4 The high-efficiency fatigue-resistant bolt includes a threaded post 1 with external threads on its exterior. A round seat 2 is provided on the upper surface of the threaded post 1, and a hexagonal boss 3 is provided on the upper surface of the round seat 2. A hexagonal recess 4 is connected to the outer surface of the threaded post 1 by threads. By connecting the threaded post to the hexagonal recess structure by threads, and then twisting the hexagonal recess after locking, a reverse tensile force can be generated on the threaded post. After mutual compression, the bolt is tightly and firmly secured, and it is not easy to slip or loosen. The fatigue resistance is improved, and the structure is relatively simple, making it suitable for mass production.

[0024] The surface of the hexagonal recess 4 is provided with a circular cavity 40 and a threaded hole 41; the inner surface of the circular cavity 40 of the hexagonal recess 4 is fitted onto the outer surface of the circular seat 2. When the threaded post 1 rotates during installation, the circular seat 2 rotates inside the hexagonal recess 3 without affecting the installation.

[0025] The inner surface of the threaded hole 41 of the hexagonal concave sleeve 4 is connected to the outer surface of the threaded column 1 by thread, which facilitates mutual installation. When in use, first install and twist the threaded column 1. After the threaded column 1 is twisted and locked, twist the hexagonal concave sleeve 4 downward to squeeze and lock the mounting surface. At this time, the hexagonal concave sleeve 4 can lock the threaded column 1 in the opposite direction, forming an outward pulling force, improving the structural firmness, and making it less prone to stripping and loosening.

[0026] The upper surface of the hexagonal boss 3 is provided with a hexagonal groove 30. The hexagonal groove 30 on the outside of the hexagonal boss 3 increases the types of tools used for installation and disassembly. It can be installed by twisting the hexagonal groove 30 into the hexagonal groove, or by rotating the hexagonal boss 3 with a wrench, which is convenient to use.

[0027] The lower outer surface of the threaded column 1 is provided with a chamfered ring, which makes it convenient to install the nut and insert it into the mounting hole. The chamfer also facilitates the installation process. The outer surface of the round seat 2 fits tightly against the inner surface of the hexagonal recess 40 at the circular cavity.

[0028] 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 high-efficiency fatigue-resistant bolt, including a threaded post (1), characterized in that: The threaded column (1) is provided with an external thread, and a round seat (2) is provided on the upper surface of the threaded column (1). A hexagonal protrusion (3) is provided on the upper surface of the round seat (2). A hexagonal concave sleeve (4) is connected to the outer surface of the threaded column (1) by a thread.

2. The high-efficiency fatigue-resistant bolt according to claim 1, characterized in that: The surface of the hexagonal concave sleeve (4) is provided with a circular cavity (40) and a threaded hole (41).

3. The high-efficiency fatigue-resistant bolt according to claim 1, characterized in that: The inner surface of the hexagonal concave sleeve (4) at the circular cavity (40) is fitted onto the outer surface of the circular seat (2).

4. The high-efficiency fatigue-resistant bolt according to claim 1, characterized in that: The inner surface of the threaded hole (41) of the hexagonal concave sleeve (4) is connected to the outer surface of the threaded column (1) by a thread.

5. The high-efficiency fatigue-resistant bolt according to claim 1, characterized in that: The upper surface of the hexagonal protrusion (3) is provided with a hexagonal groove (30).

6. The high-efficiency fatigue-resistant bolt according to claim 1, characterized in that: The lower outer surface of the threaded column (1) is provided with a circumferential chamfer.

7. The high-efficiency fatigue-resistant bolt according to claim 1, characterized in that: The outer surface of the round seat (2) is closely attached to the inner surface of the round cavity (40) of the hexagonal concave sleeve (4).

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