Mechanical expansion anchor bolt with concrete post-anchoring function

Abstract

The utility model discloses a mechanical expansion anchor bolt with a concrete post-anchoring function, which comprises a screw rod and a sleeve, the front end of the screw rod is a cone, the front end of the sleeve is provided with a notch, and the front end of the cone is provided with a convex body to form a space fall, so that the cone of the screw rod and the convex body have enough space for accommodating expansion of the notch part of the sleeve. Under the condition of the same aperture of concrete, a conventional impact sleeve can be effectively and fully expanded to achieve a post-anchoring function only through one-time impact, and the problems of loosening, failure, falling off and the like in the long-term use process can be effectively prevented; the structure is simple, secondary drilling is abandoned, installation is convenient, the hollow-out state formed between the protrusions on the screw cone and the sleeve can contain concrete dust sufficiently, production benefits are improved, and various concrete post-anchoring requirements are met.

Description

Technical Field

[0001] The utility model relates to a mechanical expansion anchor bolt with the function of post - anchoring in concrete. Background Art

[0002] For the traditional concrete - anchoring anchor bolts that have been used for a hundred years, whether they are mechanical torque - controlled or post - under - reamed anchor bolts, during the long - term engineering implementation, due to the unreasonable initial structure of the anchor bolts, large - area anchoring failures are likely to occur, resulting in problems such as loosening and falling off, thus leading to frequent equipment failures or safety accidents. To solve the problem of post - anchoring in concrete, the fastener industry has been seeking a concrete post - anchoring product with sufficient expansion function. Content of the Utility Model

[0003] The purpose of the utility model is to provide a mechanical expansion anchor bolt with the function of post - anchoring in concrete, which can effectively prevent problems such as loosening, failure, and falling off during long - term use.

[0004] The technical solution of the utility model is as follows:

[0005] A mechanical expansion anchor bolt with the function of post - anchoring in concrete, including a screw rod and a sleeve. The front end of the screw rod is a cone, and the front end of the sleeve is provided with a notch. Its characteristics are that: a convex body is provided at the front end of the cone, forming a spatial drop, so that there is enough space between the screw - rod cone and the convex body to accommodate the expansion of the notch part of the sleeve.

[0006] The front end of the sleeve is provided with an annular anti - slip groove.

[0007] The cross - section of the convex body is in the shape of a cylinder, a hollow cylinder, a triangle, a quadrilateral, a rhombus, a plum blossom, a star, a single - character shape, a double - character shape, a triple - character shape, a cross - shape, an ellipse or a geometric non - regular polygon.

[0008] The front end of the sleeve is provided with an annular anti - slip groove and is divided into four pieces through the notch.

[0009] Under the condition of the same concrete hole diameter, the utility model can effectively and fully expand the post - anchoring function with only one strike using a conventional impact sleeve, and can effectively prevent problems such as loosening, failure, and falling off during long - term use; the structure is simple, abandoning secondary drilling, convenient for installation, and the hollow state formed between the convex body on the screw - rod cone and the sleeve is enough to accommodate concrete dust, improving the construction and installation efficiency, and is applicable to various non - cracked concrete, cracked concrete and post - anchoring requirements for seismic grades.

[0010] The screw rod can be made of materials with good corrosion resistance and high strength to ensure the anchoring anti - load and service life. Description of the Drawings

[0011] The following further illustrates the utility model in conjunction with the drawings and embodiments.

[0012] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model.

[0013] Figure 2 It is a schematic structural diagram of the screw rod.

[0014] Figure 3 It is a schematic structural diagram of the casing.

[0015] Figure 4 It is a schematic diagram of the usage state of an expansion anchor bolt in the prior art.

[0016] Figure 5 It is a schematic diagram of the screw rod in the prior art. Detailed implementation manners

[0017] A mechanical expansion anchor bolt with a post-anchoring function for concrete includes a screw rod 1 and a casing 2. The front end of the screw rod is a cone 3, and the front end of the casing is provided with a notch 4. A convex body 5 is provided at the front end of the cone to form a spatial drop, so that there is enough space for the screw rod cone and the convex body to accommodate the expanded part of the casing notch. Under the action of an external force, the casing moves forward to the screw rod cone, passes through the cone to the convex body. The screw rod cone and the convex body have enough space to accommodate the expansion of the casing, so that the post-expansion coefficient of the casing increases exponentially. A hollow state is formed between the screw rod taper protrusion and the casing to accommodate concrete dust. Flat washers 6, spring washers 7, and nuts 8 are used to adjust and fix the workpiece.

[0018] The front end of the casing is provided with an annular anti-slip groove 10 and is cut into four pieces through the notch 4.

[0019] The cross-section of the protrusion is cylindrical, cylindrical hollow, triangular, quadrilateral, rhombic, plum blossom-shaped, star-shaped, linear, double-linear, triple-linear, cross-shaped, oval or other geometric non-equilateral forms.

Claims

1. A mechanical expansion anchor bolt with post-anchoring function for concrete, comprising a screw rod and a sleeve, wherein the front end of the screw rod is a cone and the front end of the sleeve is provided with a cutout, wherein: A convex body is arranged at the front end of the cone to form a space difference, so that the screw cone and the convex body have enough space to accommodate the expansion of the sleeve cutout.

2. The mechanical expansion anchor with post-anchoring function of concrete according to claim 1 is characterized by: An annular anti-slip groove is arranged at the front end of the sleeve.

3. The mechanical expansion anchor with post-anchoring function for concrete according to claim 1 or 2, characterized in that: The cross section of the protrusion is cylindrical, hollow cylindrical, triangular, quadrilateral, plum blossom, star, straight, two-character, three-character, cross or elliptical.

4. The mechanical expansion anchor with post-anchoring function for concrete according to claim 2 is characterized by: The front end of the sleeve is provided with an annular anti-slip groove and is divided into four pieces through incisions.

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