High-strength bolt for steel structure

Abstract

The utility model relates to the technical field of bolts, in particular to a high-strength bolt for a steel structure, which comprises a bolt rod, a bolt cap is arranged on the bolt rod, an inner groove is arranged on the bolt cap, a reinforcing rib and a transverse reinforcing rod are arranged in the inner groove, an inner hexagonal groove and a cross-shaped inner groove are arranged on the bolt cap, and the cross-shaped inner groove is arranged in the cross-shaped inner groove. An upper external thread and a lower external thread are arranged on the outer wall of the bolt rod, a first screw groove and a second screw groove are formed in the bolt rod, the outer wall of the bolt rod is sleeved with a first high-strength half shell and a second high-strength half shell, and the first high-strength half shell and the second high-strength half shell are provided with anti-collision and wear-resistant layers and screw penetrating holes. And a first machine-grain screw and a second machine-grain screw are inserted into the screw through holes. The structural high strength between the bolt cap and the bolt bar on the bolt body is integrally improved, the transverse shear resistance strength of the middle of the bolt bar is integrally improved, and the diversity of disassembly and assembly modes of the bolt cap on the bolt body is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to a high-strength bolt for steel structures. Background Technique

[0002] Steel structure is one of the most widely used structural forms in building structures. It is a structural system composed of steel materials (such as steel plates, profiled steels, steel pipes, etc.) through welding, bolt connection or rivet connection. Due to the characteristics of light self-weight, large stiffness, good seismic performance, high industrialization degree and fast construction speed of steel structure workshops, many production workshops will adopt steel structure workshops.

[0003] In steel structure workshops, bolt bodies are often used for threaded fastening connection of relevant connecting parts. Among them, the bolt body generally consists of a bolt rod and a bolt head. Specifically, during use, the bolt rod passes through a preset through hole on the top connecting part and then is thread-locked with a preset installation thread groove on the bottom connecting part.

[0004] At present, for the bolt body used in existing steel structure workshops, after the bolt body is thread-connected and installed, most of its bolt heads are exposed and protrude outwards. When subjected to hard collision by foreign objects, the connection part between the bolt head and the bolt rod may be inclined and cracked, greatly reducing the structural high strength between the bolt head and the bolt rod on the bolt body.

[0005] Moreover, for the bolt body used in existing steel structure workshops, the middle part of the bolt rod has relatively low transverse shear strength.

[0006] In addition, for the bolt body used in existing steel structure workshops, its bolt head can only be rotated and locked in a single way with an open-ended wrench, greatly reducing the diversity of disassembly and assembly methods of the bolt head on the bolt body.

[0007] The above problems are widespread and urgently need to be improved. Content of the Utility Model

[0008] The purpose of the utility model is to provide a high-strength bolt for steel structures to solve the above-mentioned disadvantages in the prior art.

[0009] To achieve the above purpose, the utility model adopts the following technical solutions:

[0010] Design a high-strength bolt for steel structures, including a bolt rod, on which a bolt head is provided. An inner groove is opened on the bolt head, and a reinforcing rib and a transverse reinforcing rod are arranged in the inner groove. An inner hexagonal groove and a cross inner groove are opened on the bolt head. Upper external threads and lower external threads are respectively arranged on the outer wall of the bolt rod. A first screw groove and a second screw groove are opened on the bolt rod. A first high-strength half shell and a second high-strength half shell are sleeved on the outer wall of the bolt rod. An anti-collision and wear-resistant layer and a screw through-hole are arranged on the first high-strength half shell and the second high-strength half shell. A first machine screw and a second machine screw are inserted into the screw through-hole.

[0011] Further, the inner groove is opened at the bottom of the bolt head. The top end of the bolt rod is fixedly arranged with the inner groove wall of the inner groove. The inner groove is an annular inner groove as a whole.

[0012] Further, the cross section of the reinforcing rib is a triangular structure. The reinforcing rib is arranged between the outer wall of the bolt rod and the inner groove wall of the inner groove. The transverse reinforcing rod is arranged between the reinforcing rib and the inner groove wall of the inner groove.

[0013] Further, the reinforcing rib and the transverse reinforcing rod are a group, and there are six groups arranged in a circumferential arrangement. Both the reinforcing rib and the transverse reinforcing rod are made of hard alloy tungsten steel.

[0014] Further, the first machine screw passes through the first high-strength half shell and is threadedly connected with the first screw groove. The second machine screw passes through the second high-strength half shell and is threadedly connected with the second screw groove. The top view cross sections of the first high-strength half shell and the second high-strength half shell are both semi-arc-shaped structures.

[0015] Further, both the inner hexagonal groove and the cross inner groove are opened at the central part of the top end of the bolt head.

[0016] Further, the anti-collision and wear-resistant layer is arranged on the outer wall surfaces of the first high-strength half shell and the second high-strength half shell. The anti-collision and wear-resistant layer is made of titanium carbide TiCN coating material, and the thickness of the anti-collision and wear-resistant layer is 15 microns.

[0017] The beneficial effects of a high-strength bolt for steel structures proposed by the present utility model are as follows:

[0018] 1. By opening an inner groove on the bolt head and arranging a reinforcing rib and a transverse reinforcing rod structure in a circumferential arrangement in the inner groove, the overall structural high strength between the bolt head and the bolt rod on the bolt body is improved.

[0019] 2. By arranging a first high-strength half shell and a second high-strength half shell on the outer side wall of the bolt rod and arranging an anti-collision and wear-resistant layer structure on the outer walls of the first high-strength half shell and the second high-strength half shell, the overall transverse shear strength in the middle of the bolt rod is further improved.

[0020] 3. The utility model realizes the rotation disassembly and assembly of the bolt cap on the bolt body through an opening wrench, an internal hexagonal wrench, a cross screwdriver, and a flat screwdriver by opening an internal hexagonal groove and a cross groove structure on the bolt cap, greatly improving the diversity of the disassembly and assembly methods of the bolt cap on the bolt body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exploded view of the overall structure of the utility model;

[0022] Figure 2 is a first perspective three-dimensional schematic diagram of the installation state of the overall structure of the utility model;

[0023] Figure 3 is a front elevation perspective schematic diagram of the overall structure of the utility model;

[0024] Figure 4 is a second perspective three-dimensional schematic diagram of the installation state of the overall structure of the utility model;

[0025] Figure 5 is the Figure 4 partial enlarged view at M of the utility model;

[0026] Figure 6 is the Figure 1 three-dimensional schematic diagram of the first high-strength half shell of the utility model.

[0027] In the figure: 1 bolt rod; 11 upper external thread; 12 lower external thread; 2 bolt cap; 21 internal hexagonal groove; 22 cross internal groove; 3 first high-strength half shell; 31 anti-collision and wear-resistant layer; 32 first screw through hole; 4 first machine screw; 5 second high-strength half shell; 51 second screw through hole; 6 second machine screw; 7 first screw groove; 8 second screw groove; 9 internal groove; 91 reinforcing rib; 92 transverse reinforcing bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0029] Refer to Figures 1-6, A high-strength bolt for steel structures, including a bolt rod 1, a bolt head 2 is arranged on the bolt rod 1, an inner groove 9 is opened on the bolt head 2, a reinforcing rib 91 and a transverse reinforcing rod 92 are arranged in the inner groove 9, an inner hexagonal groove 21 and a cross inner groove 22 are opened on the bolt head 2, upper external threads 11 and lower external threads 12 are respectively arranged on the outer wall of the bolt rod 1, a first screw groove 7 and a second screw groove 8 are opened on the bolt rod 1, a first high-strength half shell 3 and a second high-strength half shell 5 are sleeved on the outer wall of the bolt rod 1, an anti-collision and wear-resistant layer 31 and a screw perforation 32 are arranged on the first high-strength half shell 3 and the second high-strength half shell 5, and a first machine screw 4 and a second machine screw 6 are inserted into the screw perforation 32.

[0030] Specifically, the inner groove 9 is opened at the bottom of the bolt head 2, the top end of the bolt rod 1 is fixedly arranged with the inner groove wall of the inner groove 9, the inner groove 9 is an annular inner groove as a whole, and both the reinforcing rib 91 and the transverse reinforcing rod 92 are not higher than the inner groove 9 to ensure the normal thread installation of the bolt rod 1 and the bolt head 2.

[0031] Furthermore, the cross section of the reinforcing rib 91 is a triangular structure, the reinforcing rib 91 is arranged between the outer wall of the bolt rod 1 and the inner groove wall of the inner groove 9, and the transverse reinforcing rod 92 is arranged between the reinforcing rib 91 and the inner groove wall of the inner groove 9.

[0032] Still further, the reinforcing rib 91 and the transverse reinforcing rod 92 are in a group, and there are a total of six groups arranged in a circumferential manner. Both the reinforcing rib 91 and the transverse reinforcing rod 92 are made of cemented carbide tungsten steel. The cemented carbide tungsten steel material has excellent high strength. The triangular reinforcing rib 91 has the stability of a triangle. At the same time, the transverse reinforcing rod 92 will form a triangular inner groove with the inner groove 9, which overall improves the structural high strength between the bolt head 2 and the bolt rod 1.

[0033] More specifically, the first machine screw 4 passes through the first high-strength half shell 3 and is threadedly connected with the first screw groove 7, the second machine screw 6 passes through the second high-strength half shell 5 and is threadedly connected with the second screw groove 8, and the top view cross sections of the first high-strength half shell 3 and the second high-strength half shell 5 are both semi-arc-shaped structures.

[0034] Generally speaking, both the inner hexagonal groove 21 and the cross inner groove 22 are opened at the central part of the top end of the bolt head 2, so that the bolt head 2 on the bolt body can be rotated and disassembled by an open-end wrench, an inner hexagonal wrench, a cross screwdriver, and a flat screwdriver.

[0035] Finally, the anti-collision and wear-resistant layer 31 is arranged on the outer wall surfaces of the first high-strength half shell 3 and the second high-strength half shell 5. The anti-collision and wear-resistant layer 31 is made of titanium carbide TiCN coating material, and the thickness of the anti-collision and wear-resistant layer 31 is 15 microns. The titanium carbide TiCN coating material has excellent anti-collision and wear resistance, which improves the anti-transverse shear strength in the middle of the bolt rod 1.

[0036] Working mode: By providing an inner groove 9 on the bolt cap 2 and arranging reinforcing ribs 91 and transverse reinforcing rods 92 in a circumferential arrangement within the inner groove 9, the structural high strength between the bolt cap 2 and the bolt rod 1 on the bolt body is overall improved.

[0037] Moreover, the first high-strength half shell 3 is sleeved on the middle position of the bolt rod 1, then the first setscrew 4 is passed through the first high-strength half shell 3, and then the first setscrew 4 is rotated clockwise by a screwdriver and thread-locked with the first thread groove 7. At the same time, the second high-strength half shell 5 is sleeved on the middle position of the bolt rod 1, then the second setscrew 6 is passed through the second high-strength half shell 5 and engaged with the second thread groove 8, and then the first setscrew 4 is rotated clockwise by a screwdriver and thread-locked with the first thread groove 7. Then, the bolt rod 1 is passed through the steel structure plate part to be installed for thread installation. The first high-strength half shell 3 and the second high-strength half shell 5 provided with an impact-resistant and wear-resistant layer 31 further improve the middle anti-transverse shear strength of the bolt rod 1 overall.

[0038] In addition, by providing an inner hexagonal groove 21 and a cross groove 22 on the bolt cap 2, the bolt cap 2 on the bolt body can be rotated and disassembled by an open-end wrench, an inner hexagonal wrench, a cross screwdriver, and a flat screwdriver, greatly improving the diversity of the disassembly and assembly methods of the bolt cap 2 on the bolt body.

[0039] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A high-strength bolt for steel structures, comprising a bolt rod (1), characterized in that: A bolt head (2) is provided on the bolt rod (1). An inner groove (9) is formed in the bolt head (2). A reinforcing rib (91) and a transverse reinforcing rod (92) are arranged in the inner groove (9). An inner hexagonal groove (21) and a cross inner groove (22) are formed in the bolt head (2). Upper external threads (11) and lower external threads (12) are respectively arranged on the outer wall of the bolt rod (1). A first screw groove (7) and a second screw groove (8) are formed in the bolt rod (1). A first high-strength half shell (3) and a second high-strength half shell (5) are sleeved on the outer wall of the bolt rod (1). An anti-collision and wear-resistant layer (31) and a screw through hole (32) are arranged on the first high-strength half shell (3) and the second high-strength half shell (5). A first JIS screw (4) and a second JIS screw (6) are inserted into the screw through hole (32).

2. The high-strength bolt for steel structures according to claim 1, characterized in that: The inner groove (9) is formed at the bottom of the bolt head (2). The top end of the bolt rod (1) is fixedly arranged with the inner groove wall of the inner groove (9). The inner groove (9) is an annular inner groove as a whole.

3. The high-strength bolt for steel structures according to claim 1, wherein: The cross section of the reinforcing rib (91) is a triangular structure. The reinforcing rib (91) is arranged between the outer wall of the bolt rod (1) and the inner groove wall of the inner groove (9). The transverse reinforcing rod (92) is arranged between the reinforcing rib (91) and the inner groove wall of the inner groove (9).

4. The high-strength bolt for steel structures according to claim 3, characterized in that: The reinforcing rib (91) and the transverse reinforcing rod (92) are in a group, and there are six groups arranged in a circumferential pattern. Both the reinforcing rib (91) and the transverse reinforcing rod (92) are made of hard alloy tungsten steel.

5. A high-strength bolt for steel structures according to claim 1, characterized in that: The first JIS screw (4) passes through the first high-strength half shell (3) and is threadedly connected with the first screw groove (7). The second JIS screw (6) passes through the second high-strength half shell (5) and is threadedly connected with the second screw groove (8). The top view cross sections of the first high-strength half shell (3) and the second high-strength half shell (5) are both semi-arc-shaped structures.

6. The high-strength bolt for steel structures according to claim 1, characterized in that: The inner hexagonal groove (21) and the cross inner groove (22) are both formed at the central position of the top end of the bolt head (2).

7. A high-strength bolt for steel structures according to claim 1, characterized in that: The anti-collision and wear-resistant layer (31) is arranged on the outer wall surfaces of the first high-strength half shell (3) and the second high-strength half shell (5). The anti-collision and wear-resistant layer (31) is made of titanium carbide TiCN coating material, and the thickness of the anti-collision and wear-resistant layer (31) is 15 microns.

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