Concrete undercut self-tapping anchor bolt

Abstract

The utility model discloses a concrete undercut self-tapping anchor bolt, and relates to the technical field of self-tapping threads. The anchor rod comprises an anchor rod body, a first spiral thread and a second spiral thread are arranged on the surface of the anchor rod body, a notch is formed in the surface of the first spiral thread, an operation boss is welded to the top end of the anchor rod body, and a cutting rib and a positioning cone are fixedly installed at the bottom end of the anchor rod body. And the anchor rod passing through the bottom end of the anchor rod is positioned when self-tapping into concrete. According to the self-tapping anchor rod, through the positioning cone at the bottom end of the anchor rod, the anchor rod can be positioned with the surface of concrete before being self-tapped into the concrete, and the operation boss is driven to rotate through sleeving of the inner hexagonal tool and the operation boss; concrete is cut through the cutting ribs at the bottom end of the anchor rod and the first spiral threads and the second spiral threads on the surface of the anchor rod, so that self-tapping into the concrete is achieved, and the concrete can be better cut through the notches formed in the surfaces of the first spiral threads.

Description

TECHNICAL FIELD

[0001] The utility model relates to self tapping thread technical field, concretely relates to concrete bottom self tapping anchor bolt. BACKGROUND

[0002] In the field of building and decoration, concrete self tapping screw is widely used for fixing various materials on the concrete surface, and the concrete self tapping screw is cut into the concrete, and the thread on the surface is used to cut the concrete.

[0003] The existing self bottoming anchor bolt usually adopts self geometric cutting edge or symmetrical welding two pieces of hard alloy cutting edge structure, and the design is low in efficiency when cutting concrete, and the hole forming quality is poor, and the thread on the surface of the existing self tapping screw is smooth, and when the self tapping screw is used, especially when the self tapping screw is cut into the concrete, the thread is difficult to cut the concrete, the resistance is large, and the installation process is not smooth.

[0004] Therefore, the concrete bottom self tapping anchor bolt is provided. UTILITY MODEL CONTENTS

[0005] The utility model discloses a concrete bottom self tapping anchor bolt.

[0006] The utility model discloses a concrete bottom self tapping anchor bolt.

[0007] The concrete bottom self tapping anchor bolt, including the anchor rod, the surface of the anchor rod is provided with first helical thread and second helical thread, the surface of the first helical thread is provided with the notch, the top of the anchor rod is welded with the operation boss, the bottom of the anchor rod is fixedly installed with the cutting rib and the positioning cone, and the anchor rod is positioned when being self tapped into the concrete.

[0008] Further, the first helical thread and the second helical thread are parallelly arranged, and the diameter of the first helical thread is greater than that of the second helical thread.

[0009] Further, the operation boss includes a polished rod fixedly installed at the top of the anchor rod, the top of the polished rod is fixedly installed with a ring body, the bottom surface of the ring body is provided with a groove, and the top surface of the ring body is fixedly installed with a hexagonal convex, to adapt to an internal hexagonal tool.

[0010] Further, the edge of the bottom of the anchor rod is provided with an annular chamfer surface, to assist the anchor rod in self tapping into the concrete.

[0011] Further, the surface of the cutting rib is provided with at least two groups of V-shaped openings, to assist in cutting the concrete when drilling into the concrete.

[0012] Further, the cutting rib is made of high-strength hard alloy, and the surface of the cutting rib is provided with a cutting edge.

[0013] The utility model discloses the following advantages:

[0014] The positioning cone at the bottom end of the anchor rod can be positioned with the surface of the concrete before self-tapping into the concrete, the inner hexagonal tool and the operation boss are sleeved to drive the rotation, the cutting rib at the bottom end of the anchor rod and the first helical thread and the second helical thread on the surface of the anchor rod cut the concrete to realize self-tapping into the concrete, and the first helical thread is cut on the surface to cut the concrete better. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is the A part enlarged view of the utility model; Figure 1

[0017] Figure 3 It is the bottom view of the utility model;

[0018] Figure 4 It is the B part enlarged view of the utility model; Figure 3

[0019] Reference signs: 1, anchor rod; 11, annular chamfer surface; 2, first helical thread; 3, second helical thread; 4, cutout; 5, operation boss; 501, light pole; 502, ring body; 503, groove; 504, six-rib convex; 6, cutting rib; 61, V-shaped opening; 7, positioning cone. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] ​​It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] like Figures 1 to 4 As shown, a concrete self-tapping anchor bolt includes an anchor rod 1. The surface of the anchor rod 1 is provided with a first helical thread 2 and a second helical thread 3. A notch 4 is opened on the surface of the first helical thread 2. An operating boss 5 is welded to the top of the anchor rod 1. A cutting rib 6 and a positioning cone 7 are fixedly installed at the bottom of the anchor rod 1. The anchor rod 1 at the bottom is positioned when it self-taps into the concrete. More specifically, the positioning cone 7 at the bottom of the anchor rod 1 allows it to be positioned with the surface of the concrete before self-tapping into the concrete. An internal hexagonal tool is fitted onto the operating boss 5 and rotates it. The cutting rib 6 at the bottom of the anchor rod 1 and the first helical thread 2 and the second helical thread 3 on the surface of the anchor rod 1 cut the concrete to achieve self-tapping into the concrete. The notch 4 on the surface of the first helical thread 2 allows for better cutting of the concrete.

[0025] The first helical thread 2 and the second helical thread 3 are arranged in parallel, and the diameter of the first helical thread 2 is larger than the diameter of the second helical thread 3. More specifically, the self-tapping threads of the first helical thread 2 and the second helical thread 3 with their varying tooth heights can better cut concrete and ensure that the resistance encountered during penetration does not continuously increase.

[0026] The operating boss 5 includes a smooth rod 501 fixedly installed at the top of the anchor rod 1. A ring 502 is fixedly installed at the top of the smooth rod 501. A groove 503 is formed on the bottom surface of the ring 502, and a hexagonal protrusion 504 is fixedly installed on the top surface of the ring 502 to accommodate an internal hexagonal tool. More specifically, the hexagonal protrusion 504 accommodates the internal hexagonal tool, and the groove 503 on the bottom surface of the ring 502 increases the frictional force in contact with the surface of the fixed object, thereby improving the stability of the fixed object.

[0027] The edge of the bottom end of the anchor rod 1 is provided with an annular chamfer surface 11 to assist the anchor rod 1 to be self-tapping into the concrete.

[0028] The surface of the cutting rib 6 is provided with at least two groups of V-shaped openings 61 to assist the cutting into the concrete. More specifically, the V-shaped openings 61 on the surface of the cutting rib 6 increase the cutting efficiency in the concrete.

[0029] The cutting rib 6 is made of high-strength hard alloy, and the surface of the cutting rib 6 is provided with a blade edge. More specifically, the cutting rib 6 made of hard alloy improves the cutting efficiency of the concrete.

[0030] In summary, the bottom end of the anchor rod 1 is provided with a positioning cone 7 to be positioned with the surface of the concrete before being self-tapped into the concrete, the inner hexagonal tool is sleeved with the operation boss 5 to drive it to rotate, the cutting rib 6 at the bottom end of the anchor rod 1 and the first spiral thread 2 and the second spiral thread 3 on the surface of the anchor rod 1 cut the concrete to be self-tapped into the concrete, the cutout 4 on the surface of the first spiral thread 2 cuts the concrete better, and the self-tapping screw is better self-tapped into the concrete.

[0031] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A concrete undercut self-drilling anchor bolt characterised in that, The utility model provides an anchor rod (1), the surface of the anchor rod (1) is provided with first spiral thread (2) and second spiral thread (3), the surface of first spiral thread (2) is opened with cutout (4), the top end of anchor rod (1) is welded with operating boss (5), the bottom end of anchor rod (1) is fixedly installed with cutting rib (6) and positioning cone (7), the anchor rod (1) of anchor rod (1) bottom end is positioned when being driven into concrete.

2. The concrete undercut self-augmenting anchor of claim 1, wherein, The first spiral thread (2) and the second spiral thread (3) are arranged in parallel, and the diameter of the first spiral thread (2) is greater than the diameter of the second spiral thread (3).

3. The concrete undercut self-augmenting anchor of claim 1, wherein, The operating boss (5) includes a light rod (501) fixedly installed at the top end of the anchor rod (1), a ring body (502) fixedly installed at the top end of the light rod (501), a groove (503) formed at the bottom surface of the ring body (502), and a hexagonal protrusion (504) fixedly installed at the top surface of the ring body (502) to adapt to an internal hexagonal tool.

4. The concrete undercut self-augmenting anchor of claim 1 wherein, An annular chamfered surface (11) is arranged at the edge of the bottom end of the anchor rod (1) to assist the anchor rod (1) in being driven into concrete.

5. The concrete undercut self-augmenting anchor of claim 1 wherein, At least two groups of V-shaped openings (61) are formed at the surface of the cutting rib (6) to assist in cutting concrete when drilled into concrete.

6. The concrete undercut self-augmenting anchor of claim 5, wherein, The cutting rib (6) is made of high-strength hard alloy, and the surface of the cutting rib (6) is provided with a blade edge.

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