CN2134523Y

CN2134523Y - Anti-turn, dismountable expanding bolt

Info

Publication number: CN2134523Y
Application number: CN 92229370
Authority: CN
Inventors: 李炜光; 王仲仁
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-30
Filing date: 1992-07-30
Publication date: 1993-05-26
Anticipated expiration: 2002-07-30

Abstract

The utility model belongs to an expansion bolt, comprising a bolt, an expansion block, an expansion sleeve and an anti-dust cover. A hat brim and a dummy club are arranged on the end of the hexagonal nut of the bolt, the expansion block is composed of a circular cone and a cylinder, and anti-rotation convex ribs are arranged on the surface of the circular cone. A cap brim integrated with the expansion sleeve is arranged on one end of the expansion sleeve, notches are arranged on the circumference of the cap brim, and the anti-dust cover is sheathed on the external of the expansion sleeve. The utility model can overcome the disadvantages of the existing expansion bolt; the disadvantages are that the exposed length of the existing expansion bolt is not uniform, the trackslip is easily generated to the existing expansion bolt, and the existing expansion bolt can be taken out by dismounting. The utility model has the advantages of simple structure, simple and convenient operation and favorable effect, and series expansion bolts can be manufactured according to the requirement.

Description

Anti-turn, dismountable expanding bolt

The utility model belongs to a kind of EXPANSION ANCHOR BOLTS.

EXPANSION ANCHOR BOLTS is the coupling that often uses in fitting-out work, is used for flitch and other workpiece are fixed on the sole plates such as wall ground or ceiling.Known EXPANSION ANCHOR BOLTS is to be made of bolt and expansion set that nut, an end have a cone.Be to draw bolt outward, under the effect of the inner cone conical surface of bolt, make expansion set opening end distending by fastening nut, thereby flitch or workpiece are fixed on the sole plate,, have some shortcomings though this EXPANSION ANCHOR BOLTS is simple in structure, using effect is bad, and major defect is:

1, because the sole plate material is inhomogeneous, reasons such as vibration and operation during boring, hole tolerance is bigger, if make the EXPANSION ANCHOR BOLTS clamping force identical, it is bigger that the length that bolt is pulled out then differs, and causes difficulty to construction.Identical as engine request bolt protruded length, can only long bolt saw is short, this moment, EXPANSION ANCHOR BOLTS was because of being subjected to vibration easily loosening.

2, because job site dirt, sand and sawdust are more, and screw thread is stained with dirt etc. easily, so when fastening nut, the EXPANSION ANCHOR BOLTS phenomenon of trackslipping often occurs.

3, owing to reasons such as design or constructions, when needing to change mounted EXPANSION ANCHOR BOLTS position, unless this hole is enlarged calcellation, otherwise the EXPANSION ANCHOR BOLTS dismounting can't be taken out.

The purpose of this utility model provides the dismountable EXPANSION ANCHOR BOLTS of a kind of antislip.Can overcome the existing above-mentioned shortcoming of known EXPANSION ANCHOR BOLTS.

The utility model comprises bolt, expand piece, expansion set, and it is characterized in that: bolt has shade and positioning boss at the hexagonal nuts end; Bloated piece is to be made of cone and cylindrical body, and the anti-rotation convex tendon is arranged on conical surface; Expansion set has a shade that joins together with it at an astomous end; Dustproof hood is equipped with in the expansion set outside.

Below with reference to description of drawings details of the present utility model and working condition.

Accompanying drawing is the detachable EXPANSION ANCHOR BOLTS assembling of an antislip schematic representation.Bolt (2) has shade (7) and positioning boss (6) at the hexagonal nuts end, and shade can be made one with hexagonal nuts, also can adopt packing ring, and effect is identical.Positioning boss (6) contacts with expansion set (3), plays the role of positioning; The piece (1) that expands is made of cone and cylindrical body, has tapped hole to connect with bolt (2), and the anti-rotation convex tendon is arranged on conical surface.Conical surface can make expansion set (3) opening end distending, and the cylndrical surface can prevent back bending behind the expansion set distending, improves to connect quality.The anti-rotation convex tendon is embedded in the opening slot of expansion set (3), so the piece (1) that expands can only be done axial relative movement with expansion set (3); Expansion set (3) has a little flange (5) that joins together with it at an astomous end, and flanged cap has several recesses along periphery, and the shade recess can be used to prevent that expansion set from rotating.As looser a bolt bloated piece is fallen back on the bottom, utilize flange (5) shade EXPANSION ANCHOR BOLTS dismounting in the hole can be taken out.Dustproof hood (4) is equipped with in expansion set (3) outside, and dustproof hood is made with plastic film, can prevent that dirt, sand, sawdust etc. adhere on the screw thread when mounted, and dustproof hood together by distending, does not influence the connection effect in company with expansion set when tighting a bolt.

The utility model is a kind of EXPANSION ANCHOR BOLTS simple in structure, easy and simple to handle, effective, can be made into the EXPANSION ANCHOR BOLTS of series as required.

Claims

1, a kind of antislip, detachable EXPANSION ANCHOR BOLTS, it comprises bolt, expand piece, expansion set, feature of the present utility model is: bolt has shade and positioning boss at the hexagonal nuts end; Bloated piece is to be made of cone and cylindrical body; On conical surface, the anti-rotation convex tendon is arranged; Expansion set has a shade that joins together with it at an astomous end; Dustproof hood is equipped with in the expansion set outside.

2, EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that the shade of described bolt hexagonal nuts end, and available packing ring replaces.