CN2227221Y

CN2227221Y - Large swell increment expansion bolt

Info

Publication number: CN2227221Y
Application number: CN 95216579
Authority: CN
Inventors: 华欣
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-24
Filing date: 1995-07-24
Publication date: 1996-05-15
Anticipated expiration: 2005-07-24

Abstract

The utility model relates to a large swell increment expansion bolt, comprising a screw bolt 11, an expansion screw cap 1, a bar expansion body 5 and a collar 8. A stop collar 9 and a hexa square head 10 are arranged on the screw bolt 11. One end of the bar expansion body 5 is installed in the collar 8. The shrinking opening 12 of the collar 8 is clamped at the place of the neck 7 of the bar expansion body 5. A spring ring 3 is installed in a spring groove 4 which is at the other end of the bar expansion body 5. The expansion screw cap 1 is installed at the position of the screw bolt which is corresponding to the inner inclined plane 2 of the bar expansion body. The screw bolt 11 is rotated, making the expansion screw cap 1 move axially and the bar expansion body 5 spread out and impact in a reprocessing bottom hole, and as a result the screw bolt is fixed on the wall surface. The utility model is characterized in that the swell increment is large, the connection is reliable and the requirement of the size of the reprocessing bottom hole isn't high.

Description

Big swell increment EXPANSION ANCHOR BOLTS

The utility model relates to the five metals equipment, specifically is a kind of EXPANSION ANCHOR BOLTS of big swell increment.

EXPANSION ANCHOR BOLTS has easy to use, connects advantages such as reliable, is used widely in interior decoration and equipment installation.The swell increment of its expander of EXPANSION ANCHOR BOLTS that uses is smaller at present, thereby requires the aperture of preprocessing hole to adapt with the external diameter of EXPANSION ANCHOR BOLTS, can not be excessive.Otherwise,, EXPANSION ANCHOR BOLTS and body of wall can occur and can't tighten up or tighten up not firm phenomenon because the swell increment of EXPANSION ANCHOR BOLTS is little.

The purpose of this utility model is at the little problem of the EXPANSION ANCHOR BOLTS swell increment of present use, provides a kind of not high to preprocessing bottom outlet size requirement, connects the EXPANSION ANCHOR BOLTS of reliably big swell increment.

The utility model is achieved in that big swell increment EXPANSION ANCHOR BOLTS comprises bolt, bar shaped expander, comprises expansion nut, collar and spring ring in addition.Be shaped on six square toes and limited ring on the bolt.The bar shaped expander is elongated, and its inboard has an inclined-plane, and the outside one end is shaped on spring groove, and the other end is shaped on draw-in groove, and outer surface is along circumferentially being shaped on annular groove.Collar is an indent annular solid that has contraction mouth, and the center has the circular hole that passes for bolt.Collar is loaded on a side of bolt limited ring.One end of bar shaped expander is loaded in the collar, and draw-in groove is stuck in the contraction mouth place of collar.In the spring groove of the bar shaped expander the other end spring ring is housed.Expansion nut is equipped with at the bolt position corresponding with the inboard inclined-plane of bar shaped expander.The limit number of expansion nut is 4-6, and the quantity of bar shaped expander is consistent with the limit number of expansion nut.

Limited ring on the bolt and six square toes can fuse, and also can be separated from each other.

During use, the utility model is put into prefabricated bottom outlet, rotating bolt, under the restriction of spring ring and bar shaped expander, expansion nut can not rotate, and can only move axially along bolt.Expanding when nut moves axially, promote corresponding bar shaped expander by its each limit and open, until being adjacent to, and EXPANSION ANCHOR BOLTS firmly is fixed in the prefabricated hole with prefabricated bottom outlet.

It is big that the utility model compared with prior art has swell increment, fixes advantages such as reliable.

Fig. 1 is a tectonic maps of the present utility model;

Fig. 2 is the plan view of bar shaped expander;

Fig. 3 is the plan view of Fig. 2;

Fig. 4 is the sectional view of collar;

Fig. 5 is the left side view of Fig. 4;

Fig. 6 is the sectional view of expansion nut;

Fig. 7 is the left side view of Fig. 6;

Fig. 8 is a kind of tectonic maps of bolt;

Fig. 9 is the tectonic maps of another kind of bolt.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the three-dimensional structure diagram that takes down a bar shaped expander.As seen from the figure, big swell increment EXPANSION ANCHOR BOLTS comprises bolt 11, expansion nut 1, bar shaped expander 5 and collar 8.Be shaped on limited ring 9 and six square toes 10 on the bolt 11, both can be made into one, but also split, as Fig. 8, shown in Figure 9.The effect of limited ring 9 is to keep the axial position of collar 8 and bar shaped expander 5 and bolt 11 constant.Bar shaped expander 5 is not contained in the collar 8 with an end on inboard inclined-plane, and the contraction mouth 12 of collar 8 is stuck in draw-in groove 7 places of bar shaped expander 5.The spring ring 3 that several bar shaped expanders receipts are disturbed is housed in the spring groove 4 of bar shaped expander 5 the other ends, and expansion nut 1 is contained in and 2 corresponding bolt positions, the inboard inclined-plane of bar shaped expander.Expansion nut can be tetrahedron or pentahedron, hexahedron, and the quantity of bar shaped expander equates with the limit number of EXPANSION ANCHOR BOLTS.For EXPANSION ANCHOR BOLTS is contacted firmly with prefabricated bottom outlet, bar shaped expander 5 outer surfaces are shaped on circumferential recess, to increase frictional force.

Claims

1, a kind of big swell increment EXPANSION ANCHOR BOLTS is characterized in that comprising bolt, bar shaped expander, expansion nut, collar and spring ring; Be shaped on six square toes and limited ring on the bolt; The bar shaped expander is elongated, and there is an inclined-plane its inboard, and the outside one end is shaped on spring groove, and the other end is shaped on draw-in groove, and outer surface is along circumferentially being shaped on annular groove; Collar is an indent annular solid that has contraction mouth, and the center has the circular hole that passes for bolt; Collar is contained in a side of bolt limited ring; One end of bar shaped expander is loaded in the collar, and draw-in groove is stuck in the contraction mouth place of collar; In the spring groove of the bar shaped expander the other end spring ring is housed; Expansion nut is equipped with at the bolt position corresponding with the inboard inclined-plane of bar shaped expander; The quantity of bar shaped expander equates with the limit number of expansion nut.

2, by the described big swell increment EXPANSION ANCHOR BOLTS of claim 1, the limit number that it is characterized in that expansion nut is 4-6.

3, by the described big swell increment EXPANSION ANCHOR BOLTS of claim 1, it is characterized in that the limited ring on the bolt can be connected as a single entity with six square toes, also can be separated from each other.