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Novel self-undercut anchor

A technology of self-cutting and bottom anchoring, applied in the direction of connecting components, pins, mechanical equipment, etc., can solve the problems of high installation cost, slow installation speed, and large stress, and achieve the effect of less material, convenient transportation, and simple structure

Pending Publication Date: 2019-07-05
SHANGHAI XIANGRUI FASTENER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This design has the following disadvantages: more materials, more waste products; large volume, high cost of transportation materials; automatic production is not possible, low production capacity; material lattice is destroyed by material removal processing, poor fatigue strength: slow installation speed, High installation cost; large stress, high requirement for distance between sides, and sensitivity

Method used

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Embodiment Construction

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] The invention discloses a new type of self-cutting bottom anchor, which is characterized in that: figure 1 and figure 2 As shown, including screw 1, expansion plate 2, nut 3 and flat washer 4, such as image 3 As shown, the screw 1 includes a screw head 11, a screw portion 12, a first cylindrical portion 13, a second cylindrical portion 14, a third cylindrical portion 15, a circular truncated portion 16, a screw tail 17 and a spherical surface sequentially connected from front to back. Part ...

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Abstract

The invention provides a novel self-undercut anchor. The anchor is characterized by comprising a screw, an expansion sheet, a nut and a flat gasket, wherein the screw comprises a screw head, a screw part, a first cylindrical part, a second cylindrical part, a third cylindrical part, a circular truncated cone part, a screw tail and a spherical part which are connected in sequence from front to back, the screw part is connected with the nut in a threaded fit manner, the flat gasket is positioned at the rear side of the nut, and the expansion sheet comprises a self-locking key and a self-cuttingknife head. The anchor has the following advantages that when the self-cutting knife head cuts a concrete hole, the self-locking key can firmly clamp a conical groove along with increase of torque, and stability and reliability are achieved; and expansion circular holes and expansion force convex points are formed in the middle of the expansion sheet, the expansion circular holes and the expansionforce convex points are arranged in a staggered mode in the circumferential direction, so that stress of the expansion sheet during rotary cutting is reduced.

Description

technical field [0001] The invention relates to the field of construction and installation engineering, in particular to a novel self-cutting bottom anchor bolt. Background technique [0002] The existing self-cutting bottom anchor bolts on the market are composed of casing self-cutting head, auxiliary casing, screw, flat washer and nut. The screw is formed by cold heading, and the casing self-cutting head and auxiliary casing are processed by the casing raw material lathe. . Such a design has the following disadvantages: a lot of materials and waste; large volume, high cost of transporting materials; no automated production, low production capacity; using material removal processing, the material lattice is destroyed, and the fatigue strength is poor; the installation speed is slow, The installation cost is high; the stress is large, and the edge spacing is high and sensitive. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a new typ...

Claims

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Application Information

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IPC IPC(8): F16B13/06
CPCF16B13/065
Inventor 杨维锐杨伟孙新波
Owner SHANGHAI XIANGRUI FASTENER CO LTD
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