Novel expansion bolt

Abstract

The invention discloses a novel expansion bolt. The novel expansion bolt comprises a screw rod and an expansion casing pipe. The screw rod is sleeved with the expansion casing pipe. One end of the screw rod is provided with a thread connected with a nut, and the other end of the screw rod is an expansion cone body. The novel expansion bolt is characterized in that a hollow columnar body is connected with the expansion cone body; a through hole is formed in the axis of the screw rod and communicated with the hollow position of the hollow columnar body; axial strip-shaped holes are formed in the circumference of the side wall of the hollow columnar body; expansion blocks corresponding to all the strip-shaped holes and capable of moving towards the outside of the strip-shaped holes are arranged in the hollow columnar body; a wedge block capable of ejecting the expansion blocks out of the strip-shaped holes is arranged in the hollow columnar body. The novel expansion bolt is of a two-level expansion structure. When the expansion amount of the expansion cone body can not be expanded firmly, the wedge block can be beaten inwards to make the expansion blocks be ejected out of the strip-shaped holes, and the expansion blocks act on the casing pipe. The expansion amount is further increased. Compared with a traditional expansion bolt, the novel expansion bolt is more suitable for modern environment-friendly building blocks of a loose honeycomb structure, concise in structure, obvious in effect and suitable for application and popularization.

Description

technical field [0001] The invention relates to an expansion bolt, in particular to a novel expansion bolt, which has a large expansion amount and is suitable for walls of honeycomb bricks. technical background [0002] In daily construction, expansion bolts are widely used as a kind of installation and connection parts. They can be installed conveniently and quickly. They are firm, reliable, economical and applicable. After inserting into the hole, expand the end of the casing and fix it on the inner wall of the wall hole. The original red brick structure wall is densely fixed, and it is easier. With the promotion of environmentally friendly buildings, red bricks have gradually stepped out of the historical stage and are replaced by hollow bricks. The light and solid part of the hollow brick body is mostly honeycomb, which is loose and fragile, which brings trouble to the use of expansion bolts. The loose honeycomb structure on the inner wall of the hole virtually offsets t...

AI Technical Summary

Problems solved by technology

[0002] In daily construction, expansion bolts are widely used as a kind of installation and connection parts. They can be installed conveniently and quickly. They are firm, reliable, economical and applicable. After inserting into the hole, expand the end of the casing and fix it on the inner wall of the wall hole. The original red brick structure wall is densely fixed, and it is easier. With the promotion of environmentally friendly buildings, red bricks have gradually stepped out of the historical stage and are replaced by hollow bricks. The light and solid part of the hollow brick body is mostly honeycomb, which is loose and fragile, which brings trouble to the use of expansion bolts. The loose honeycomb structure on the inner wall of the hole virtually offsets the expansion of some expansion bolts, and cannot be firmly connected. for technical improvement

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