Improvement device for reusable expansion screw and mounting method thereof

An expansion screw and installation method technology, applied in the direction of connecting components, pins, mechanical equipment, etc., can solve the problems of inability to screw threads, breakage of bolts, and inability to radially expand the helical body, and achieve effective screwing, efficient operation, and saving. The effect of drilling time

Inactive Publication Date: 2010-08-04
李宽弘 +1
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the process of connecting objects, the operator must apply a strong torsional force to the bolt to make the helix expand radially. Therefore, when the strength of the bolt is insufficient, there is often a problem of bolt breakage
[0008] Furthermore, under the above-mentioned abnormal use situation, when the depth of the elongated circular perforation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Improvement device for reusable expansion screw and mounting method thereof
  • Improvement device for reusable expansion screw and mounting method thereof
  • Improvement device for reusable expansion screw and mounting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] see figure 1 , figure 2 As shown, it is a preferred embodiment of the improvement device 1 of the reusable expansion screw of the present invention, which includes a spiral body 2 and a bolt 3 .

[0055] The spiral body 2 is formed by a long strip wire body 21 with a diameter spirally wound in the direction of the same mandrel. The lower end of the long strip wire body 21 is a free end, and the upper end is a flat stopper. The stopper 22, when the elongated wire body 21 is wound and formed into a long helix 2, the helix 2 forms an inner diameter d1, an outer diameter d2 and a plurality of equal distances in the direction of the parallel mandrel gap w, and the stop portion 22 extends from the upper end of the spiral body 2 toward a direction parallel to the spindle.

[0056] The bolt 3 is made of heat-treated medium-carbon steel, and the bolt 3 can also be made of alloy steel or processed to make it equal to or higher than the strength and hardness of the above-menti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an improvement device for a reusable expansion screw. The improvement device comprises a spiral body and a bolt, wherein the spiral body is formed by spirally coiling a strip wire body; the bolt comprises a head and a rod body; and the rod body is provided with a spiral part for forming a plurality of equal-pitch spiral teeth, the spiral teeth form a shape of taper thread at the bottom end of the rod body, and the maximum outside diameter of the first spiral tooth counted from the bottom end of the rod body is greater than the inside diameter of the spiral body. Therefore, in mounting steps, when the first spiral tooth is combined in a clearance of the spiral body, and after the rod body of the bolt and the spiral body are inserted into an object to be constructed at the same time by an operator to form a circular long pore canal with enough depth, the first spiral tooth with enough depth can be gradually screwed with the spiral body by means of rotating the head of the bolt no mater in a normal or abnormal use state so that the spiral body moves and expands relative to the bolt and then the bolt and the object form strong connection.

Description

technical field [0001] The invention relates to an expansion screw, in particular to a construction step in which the operator inserts the rod body and the spiral body of the bolt into the round and elongated perforation of the object to be constructed. The rod body of the bolt moves and expands to strongly connect the bolt and the improved device and installation method of the reusable expansion screw. Background technique [0002] At present, the common expansion screw is mainly composed of a sleeve with a plurality of blades and a bolt that goes through the sleeve. One end of the bolt is tapered, and the other end is provided with thread, so that the bolt passes through the sleeve. When the cylinder is inserted into the circular elongated hole of the concrete at the same time, the bolt is rotated to move the bolt relative to the sleeve, and when the blades of the sleeve are pushed through the tapered end of the bolt, the blades can be radially expanded and positioned. On...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F16B13/04
Inventor 李宽弘李聪敏
Owner 李宽弘
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap