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Expansion bolt

A technology of expansion bolts and bolts, which is applied in the direction of connecting components, pins, mechanical equipment, etc., can solve the problems of difficult positioning of bolts, unreliable connections, loose bolts, etc., and achieve the effect of simple structure, low cost and guaranteed reliability

Inactive Publication Date: 2014-06-11
HUANGSHI ZHIYUN ELECTROMECHANICAL TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing expansion bolts are composed of bolts, nuts, spring washers, flat washers and expansion cylinders. With this structure, when the expansion bolts are installed, the bolts are not easy to locate and tend to be skewed. The skewed bolts will cause stress concentration when they are stressed, and After the nuts are tightened, sometimes the bolts will loosen, the connection is not secure, and there are potential safety hazards

Method used

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  • Expansion bolt

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Embodiment Construction

[0007] see figure 1 , the present invention comprises bolt 1, nut 2, spring washer 3, flat washer 4 and expander 7, and the upper part of described bolt 1 is provided with external thread 11, and the lower end of described bolt 1 is provided with tapered end cone 12, so The bottom of the expansion tube 7 is provided with at least two notch grooves 71, and also includes a sleeve 5 and an intermediate partition 6. The expansion tube 7, the intermediate partition 6, the sleeve 5, the flat washer 4, the spring washer 3 and the nut 2 are installed in the bolt 1 sequentially from bottom to top, and the end of the expansion cylinder 7 provided with the notch groove 71 faces downward. The middle partition 6 is a gasket with a polygonal peripheral shape and a round hole in the middle.

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Abstract

The invention discloses an expansion bolt. The expansion bolt comprises a bolt body (1), a nut (2), a spring washer (3), a flat washer (4) and an expansion barrel (7), external threads (11) are formed in the upper part of the bolt (1), a tail cone (12) with a taper is mounted under the bolt body (1), and at least two notch grooves (71) are formed in the lower part of the expansion barrel (7). The expansion bolt is characterized by further comprising a sleeve barrel (5) and an intermediate clapboard (6), the expansion barrel (7), the intermediate clapboard (6), the sleeve barrel (5), the flat washer (4), the spring washer (3) and the nut (2) are mounted in the bolt body (1) in sequence from the bottom to top, and the end of the expansion barrel (7) formed with the notch grooves (71) is downward; the intermediate clapboard (6) is a polygonal gasket with a round hole at the middle. The expansion bolt has advantages of firm connection, precise positioning, simple structure, low cost and long service life.

Description

technical field [0001] The present invention relates to fasteners, in particular expansion bolts. Background technique [0002] The existing expansion bolts are composed of bolts, nuts, spring washers, flat washers and expansion cylinders. With this structure, when the expansion bolts are installed, the bolts are not easy to locate and tend to be skewed. The skewed bolts will cause stress concentration when they are stressed, and After the nut is tightened, the problem of bolt loosening sometimes occurs, the connection is not secure, and there is a potential safety hazard. Contents of the invention [0003] The object of the present invention is to provide an expansion bolt with firm connection, accurate positioning, simple structure, low cost and long service life. [0004] In order to achieve the above object, the present invention includes bolts, nuts, spring washers, flat washers and expansion cylinders, the upper part of the bolts is provided with external threads, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B13/06
Inventor 黄凌志李霖山
Owner HUANGSHI ZHIYUN ELECTROMECHANICAL TECH INST