Concrete self-tapping anchor bolt capable of being rapidly installed

Abstract

The utility model discloses a concrete self-tapping anchor bolt capable of being installed quickly, which comprises an anchor rod, a first cutting thread and a second cutting thread are arranged on the anchor rod in a surrounding mode, the front section of the first cutting thread is a sawtooth thread section, the sawtooth thread section adopts arc-shaped sawteeth, and the second cutting thread adopts arc-shaped sawteeth. And the rear section of the first cutting thread is a screw thread section.

Description

Technical Field

[0001] The utility model relates to the technical field of self - tapping anchor bolts, and particularly relates to a concrete self - tapping anchor bolt that can be quickly installed. Background Technique

[0002] The concrete self - tapping anchor bolt is a new type of anchoring product. It is different from traditional under - reamed anchor bolts and expansion anchor bolts. The anchoring principle of this kind of anchor bolt is similar to the way a screw is screwed into wood. It cuts through the concrete by the teeth on the outer wall of the anchor bolt and then matches with the threaded opening formed on the concrete to complete the anchoring. The installation method of the concrete self - tapping anchor bolt is relatively simple. It is applicable to substrates such as cracked concrete, non - cracked concrete, and dense natural stone, and is suitable for fixing medium or light loads. During installation, first, a straight - hole drill bit is used to drill a hole with a corresponding diameter and depth, then a dust blower is used to clean the dust in the hole, and finally, a torque electric drill is used to screw in the concrete self - tapping anchor bolt to complete the anchoring.

[0003] In the existing self - tapping anchor bolts, the saw teeth are ordinary V - shaped saw teeth. After cutting into the concrete block, the saw teeth are easy to break and have insufficient strength. At the same time, it is not easy to penetrate into the concrete block. Therefore, it is very necessary to design a concrete self - tapping anchor bolt that can be quickly installed. Summary of the Invention

[0004] The purpose of this application is to provide a concrete self - tapping anchor bolt that can be quickly installed.

[0005] To achieve the above - mentioned purpose, this application provides the following technical solution: A concrete self - tapping anchor bolt that can be quickly installed, including an anchor rod. It is characterized in that the anchor rod is provided with a surrounding first cutting thread and a second cutting thread. The front section of the first cutting thread is a saw - tooth thread section, and the saw - tooth thread section adopts arc - shaped saw teeth. The rear section of the first cutting thread is a screw - rod thread section.

[0006] The outer surface of the saw - tooth thread section is hardened.

[0007] The thread outer diameter of the saw - tooth thread section is 0.5 - 0.15 mm larger than the thread outer diameter of the screw - rod thread section.

[0008] The cutting edge surface of the arc - shaped saw teeth is perpendicular to the concrete hole wall.

[0009] The screw - rod thread section has an inner angle and an outer angle, and the angle value of the outer angle is less than the angle value of the inner angle.

[0010] The tail of the anchor rod has a chamfered portion.

[0011] The head of the anchor rod adopts a hexagonal flange head.

[0012] There is a fillet portion under the head between the hexagonal flange head and the anchor rod.

[0013] In summary, the technical effects and advantages of the present utility model are as follows:

[0014] In the present utility model, it can cut into hard concrete blocks faster and deeper, is not easily worn, and can be repeatedly cut. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior description.

[0016] Figure 1 It is a schematic plan view of the present utility model;

[0017] Figure 2 It is a schematic structural view of part A in the present utility model;

[0018] Figure 3 It is a schematic structural view of part B in the present utility model

[0019] Figure 4 It is a schematic three-dimensional structural view of the present utility model;

[0020] In the figure: 10, anchor bolt; 20, first cutting thread; 20a, chamfered part; 20b, fillet part under the head; 201, serrated thread section; 201a, arc-shaped serration; 202, screw thread section; α, external angle; β, internal angle; D1, thread outer diameter of the serrated thread section; D2, thread outer diameter of the screw thread section; 30, second cutting thread; 40, hexagonal flange head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to 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.

[0022] As Figures 1 - 4 shown, the quickly installable concrete self-tapping anchor bolt of the present invention includes an anchor bolt 10, and the anchor bolt 10 is provided with a surrounding first cutting thread 20 and a second cutting thread 30. The front section of the first cutting thread 20 is a serrated thread section 201, and the serrated thread section 201 adopts arc-shaped serrations 201a. The cutting edge surface of the arc-shaped serrations 201a is perpendicular to the concrete hole wall, and the arc-shaped serrations 201a provide more support for the cutting edge surface, making the strength of the cutting edge stronger; the serrations of traditional self-tapping anchor bolts are ordinary V-shaped serrations, and after cutting into the concrete block, the serrations are easily damaged and have insufficient strength; the rear section of the first cutting thread 20 is a screw thread section 202.

[0023] The outer surface of the serrated thread section 201 is hardened, and the hardening treatment is achieved by existing technologies; it can cut into hard concrete blocks faster and deeper, is not easily worn, and can be repeatedly cut; in traditional self-tapping anchor bolts, the serrated thread section 201 is not hardened and is not wear-resistant.

[0024] The thread outer diameter D1 of the serrated thread section is 0.5 - 0.15 mm larger than the thread outer diameter D2 of the screw thread section. In this embodiment, this value is 0.1 mm. After the serrated thread section cuts into the concrete, there is a certain gap between the rear screw thread section 202 and the concrete spiral hole, and the concrete self-tapping anchor bolt is more likely to penetrate into the concrete block; in traditional self-tapping anchor bolts, the outer diameters of the upper and lower threads are the same without size distinction. When cutting into the concrete, after the front serrated thread is worn, it is relatively more difficult for the rear screw thread to enter the concrete hole.

[0025] The screw thread section 202 has an inner angle β and an outer angle α, and the angle value of the outer angle α is less than the angle value of the inner angle β, which improves the strength of the thread and more effectively increases the pull-out force value of the self-tapping anchor bolt; the thread profile of traditional self-tapping anchor bolts has only a single angle, and the strength of the thread is relatively low, and the pull-out force value that can be borne after installation and use is small.

[0026] The tail of the anchor rod 10 has a chamfered portion 20a, which plays a guiding role when the concrete self-tapping anchor bolt cuts into the concrete hole.

[0027] The head of the anchor rod 10 uses a hexagonal flange head 40. The tool driving force acts on the hexagonal flange head 40, and it is not easy to slip during the installation process. The large outer diameter of the flange and the large contact area can make the fixed object more stable after being fixed.

[0028] There is a fillet portion 20b under the head between the hexagonal flange head 40 and the anchor rod 10, which can improve the installation strength of the self-tapping anchor bolt and avoid brittle fracture of the head of the self-tapping anchor bolt due to excessive load.

[0029] The above components are all common standard parts or parts known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or by conventional experimental methods.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-drilling concrete anchor bolt that can be quickly installed, comprising an anchor rod (10), characterized in that: The anchor rod (10) is provided with a first cutting thread (20) and a second cutting thread (30) which are circumferentially arranged. The front section of the first cutting thread (20) is a sawtooth thread section (201). The sawtooth thread section (201) adopts arc-shaped saw teeth (201a). The rear section of the first cutting thread (20) is a screw thread section (202).

2. A self-drilling concrete anchor bolt that can be quickly installed according to claim 1, characterized in that: The outer surface of the sawtooth pattern section (201) is hardened.

3. A quick-installable self-drilling concrete anchor according to claim 1, characterized in that: The thread outer diameter (D1) of the sawtooth thread segment is 0.5-0.15 mm larger than the thread outer diameter (D2) of the screw thread segment.

4. A self-drilling concrete anchor bolt that can be quickly installed according to claim 1, characterized in that: The cutting edge surface of the arc-shaped saw teeth (201a) is perpendicular to the concrete hole wall.

5. The quick-installable self-drilling concrete anchor according to claim 1, characterized in that: The screw thread segment (202) has an inner angle (β) and an outer angle (α), and the outer angle (α) is smaller than the inner angle (β).

6. A self-drilling concrete anchor bolt that can be quickly installed according to claim 1, characterized in that: The tail of the anchor rod (10) has a chamfered portion (20a).

7. A self-drilling concrete anchor bolt that can be quickly installed according to claim 6, characterized in that: The head of the anchor rod (10) is a hexagonal flange head (40).

8. A self-drilling concrete anchor bolt that can be quickly installed according to claim 7, characterized in that: A rounded corner portion (20b) is provided between the hexagonal flange head (40) and the anchor rod (10).

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