A type of high-strength large hexagonal head bolt for steel structures

Abstract

This utility model discloses a high-strength large hexagonal head bolt for steel structures, including a bolt and a nut. The bolt has a through groove, within which a lifting sleeve is slidably engaged. A screw is threaded to the top of the lifting sleeve, and two symmetrically arranged limiting plates are hinged to the bottom of the lifting sleeve. The nut has a limiting groove, with the limiting plates and grooves engaging. The top of the lifting sleeve has an internal hexagonal groove, and the bolt has a through hole into which a braking block is inserted. The braking block abuts against the screw, and one outer end of the braking block is a concentric arc surface with a diameter larger than the crest of the bolt's thread. The limiting plates and groove reduce the likelihood of the bolt and nut loosening due to vibration after installation. The braking block and lever further prevent relative rotation between the screw and the lifting sleeve due to vibration, thus reducing the possibility of the bolt and nut loosening.

Description

Technical Field

[0001] This utility model relates to the technical field of high-strength large hexagonal head bolts for steel structures, and in particular to a high-strength large hexagonal head bolt for steel structures. Background Technology

[0002] The existing technology CN223019163U describes a high-strength large hexagonal head bolt for steel structures, which uses an internal hexagonal hole on the hexagonal head bolt to facilitate bolt disassembly. However, it does not consider how to improve the anti-loosening problem after bolt installation. Therefore, it is necessary to design a high-strength large hexagonal head bolt for steel structures. Utility Model Content

[0003] Therefore, it is necessary to provide a high-strength large hexagonal head bolt for steel structures to address the aforementioned technical problem of not considering how to prevent loosening of large hexagonal head bolts.

[0004] To achieve the above objectives, this utility model provides a high-strength large hexagonal head bolt for steel structures, comprising a bolt and a nut. The bolt has a through groove, in which a lifting sleeve is slidably engaged. A screw is threadedly connected to the top of the lifting sleeve, and two symmetrically arranged limiting plates are hinged to the bottom of the lifting sleeve. The nut has a limiting groove, and the limiting plates are fitted with the limiting groove. The bolt has a through hole, in which a braking block is inserted. The outer end of the braking block is a concentric arc surface with a diameter larger than the crest of the bolt's thread. A rotating rod is mounted on the screw, and the braking block abuts against the rotating rod. The top of the rotating rod has an internal hexagonal groove.

[0005] Preferably, the rotating rod is provided with an annular groove, and the brake block abuts against the annular groove.

[0006] Preferably, a wear-resistant layer is installed on the brake block.

[0007] Preferably, a sealing block is slidably engaged within the internal hexagonal groove, the sealing block is slidably engaged with the through groove, and the top of the sealing block is provided with an internal hexagonal groove.

[0008] Preferably, the bottom of the limiting plate has rounded corners.

[0009] Compared with existing technologies, this technical solution has at least one of the following beneficial effects: By setting up the limiting plate and limiting groove, the bolts and nuts are less likely to loosen due to relative rotation caused by vibration after installation. By using the brake block and brake lever in combination, the screw and lifting sleeve are less likely to rotate relative to each other due to vibration, thereby reducing the possibility of the bolts and nuts loosening. Attached Figure Description

[0010] Figure 1 This is a front sectional view of an embodiment of the present invention; Figure 2 This is an exploded view of the inside of a bolt according to an embodiment of the present invention; Figure 3 This is a perspective view of an embodiment of the present utility model; In the diagram, 1. Bolt; 2. Nut; 3. Through groove; 4. Lifting sleeve; 5. Screw; 6. Limiting plate; 7. Limiting groove; 8. Socket hexagonal groove; 9. Through hole; 10. Brake block; 11. Rotating rod; 12. Annular groove; 13. Wear-resistant layer; 14. Sealing block; 15. Socket hexagonal groove II. Detailed Implementation

[0011] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0012] Please see Figures 1 to 3 This application provides a high-strength large hexagonal head bolt for steel structures, including a bolt 1 and a nut 2. The bolt 1 has a through groove 3, which is an inverted T-shape. A lifting sleeve 4 is slidably engaged in the through groove 3. A screw rod 5 is threadedly connected to the top of the lifting sleeve 4. Two symmetrically arranged limiting plates 6 are hinged to the bottom of the lifting sleeve 4. The two limiting plates abut against each other to prevent overlap or deflection to the same side of the through groove 3. A limiting groove 7 is provided on the nut 2. The limiting plate 6 is matched with the limiting groove 7. A through hole 9 is provided on the bolt 1. A brake block 10 is inserted into the through hole 9. The outer end of the brake block 10 is a concentric arc surface with a diameter slightly larger than the thread crest on the bolt 1. A rotating rod 11 is fixedly installed on the screw rod 5. The brake block 10 abuts against the rotating rod 11. An internal hexagonal groove 8 is provided at the top of the rotating rod 11.

[0013] In this embodiment, during installation, the screw 5 and the lifting sleeve 4 are first screwed together and then inserted into the through groove 3. After being inserted to the appropriate position, the two brake blocks 10 are inserted into the through hole 9, so that the two brake blocks 10 can limit the screw 5 through the rotating rod 11. Then, the assembled bolt 1 is inserted into the pre-installation hole on the mounting surface. Since the pre-installation hole on the steel structure generally fits with the crest of the thread on the bolt 1, the brake block 10, whose diameter is slightly larger than the thread, can be squeezed by the pre-installation hole. If the pre-installation... The hole has a thread that connects to the threaded part of the bolt 1, so the diameter of the brake block 10 is slightly larger than the diameter of the trough of the thread on the bolt 1. This allows the brake block 10 to exert a certain frictional braking effect on the screw 5, making it difficult for it to rotate. When the bolt 1 is inserted and the nut 2 is screwed on, the pre-set limiting groove 7 on the nut 2 can be aligned with the through groove 3. Thus, existing automatic screw-screwing tools can be used to screw the internal hexagonal groove 8 at the top of the rotating rod 11 and fix the bolt 1. Under a large force of screw-screwing, the screw 5 can overcome the braking force of the brake block 10. The lifting sleeve 4 rotates due to the effect of the sliding engagement within the through groove 3, and the screw 5 is limited by the brake block 10, making it difficult for it to slide up and down. Therefore, the screw 5 can drive the lifting sleeve 4 to slide down within the through groove 3. After the lifting sleeve 4 slides down, the two limiting plates 6 at its lower end can be offset to both sides by abutting against the inner wall of the through groove 3, and finally can be inserted into the limiting groove 7 on the nut 2. After installation, the bolt 1 and the nut 2 will not loosen due to the limiting plates 6 being engaged within the limiting groove 7 and not rotating relative to each other. The screw 5 is then... The braking effect of the brake block 10 is not easily affected by vibration and thus the bolt 1 is not easy to loosen after installation. The screw 5 only needs to be driven by a tool to rotate a few times during installation, which will not cause large wear between the screw 5 and the brake block 10 and thus reduce the braking effect. The brake block 10 abuts against the rotating rod 11, which reduces the wear of the thread on the screw 5 during rotation. An additional round groove can be set at the top of the through groove 3 to limit the rotation rod 11, thereby preventing the rotation rod 11 from moving into the through groove 3 when the internal hexagonal slot 8 is turned.

[0014] In some embodiments, to prevent the rotating rod 11 from moving up and down after being inserted into the through groove 3, an annular groove 12 is provided on the rotating rod 11, and the brake block 10 abuts against the annular groove 12. Thus, the brake block 10 can limit the rotating rod 11 by abutting against the annular groove 12, preventing it from sliding after installation.

[0015] In some embodiments, to reduce wear between the brake block 10 and the rotating rod 11, a wear-resistant layer 13 can be fixedly installed on both the brake block 10 and the outer wall of the annular groove 12. The wear-resistant layer 13 is made of a wear-resistant, high-hardness alloy material currently available in the art.

[0016] In some embodiments, to further brake the rotating rod 11, a sealing block 14 is slidably engaged within the internal hexagonal groove 8. The sealing block 14 is slidably engaged with the through groove 3, and the top of the sealing block 14 has an internal hexagonal groove 15. The sealing block 14 engages with both the rotating rod 11 and the through groove 3, thus preventing the rotating rod 11 from rotating relative to the bolt due to vibration. At the same time, the sealing block 14 can seal the through groove 3 to prevent impurities from entering. After the sealing block 14 is inserted, its outer surface can be fixed to the bolt 1 by welding, bonding, or other methods. The entire bolt 1 can be tightened through the internal hexagonal groove 15. When the bolt 1 needs to be replaced, the welding points and adhesive layer can be scraped off and removed using tools.

[0017] In some embodiments, to facilitate the deflection of the limiting plate 6 after it comes into contact with the through groove 3, the bottom of the limiting plate 6 is provided with rounded corners.

[0018] The fixed connection and rotating installation in the above embodiments can all be achieved by welding, screw fasteners and other forms in the prior art, and the rotating installation can be achieved by bearings, circular rotating blocks and circular grooves. All of the above components are standard parts, and those that are not standard parts can also be specially customized, so the inventor will not elaborate further.

[0019] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0020] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A high-strength large hexagonal head bolt for steel structures, comprising a bolt (1) and a nut (2), characterized in that, The bolt (1) is provided with a through groove (3), and a lifting sleeve (4) is slidably engaged in the through groove (3). A screw (5) is threadedly connected to the top of the lifting sleeve (4). Two symmetrically arranged limiting plates (6) are hinged to the bottom of the lifting sleeve (4). A limiting groove (7) is provided on the nut (2). The limiting plate (6) and the limiting groove (7) are matched. A through hole (9) is provided on the bolt (1). A brake block (10) is inserted into the through hole (9). The outer end of the brake block (10) is a concentric arc surface with a diameter larger than the thread crest on the bolt (1). A rotating rod (11) is installed on the screw (5). The brake block (10) abuts against the rotating rod (11). An internal hexagonal groove (8) is provided on the top of the rotating rod (11).

2. The high-strength large hexagonal head bolt for steel structures according to claim 1, characterized in that, The rotating rod (11) is provided with an annular groove (12), and the brake block (10) abuts against the annular groove (12).

3. The high-strength large hexagonal head bolt for steel structures according to claim 2, characterized in that, A wear-resistant layer (13) is installed on the brake block (10).

4. The high-strength large hexagonal head bolt for steel structures according to claim 1, characterized in that, A sealing block (14) is slidably engaged in the internal hexagonal groove (8), and the sealing block (14) is slidably engaged in the through groove (3). The top of the sealing block (14) is provided with an internal hexagonal groove (15).

5. The high-strength large hexagonal head bolt for steel structures according to claim 1, characterized in that, The bottom of the limiting plate (6) is rounded.

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