CN2221677Y

CN2221677Y - Hammer expansion bolt

Info

Publication number: CN2221677Y
Application number: CN 95233503
Authority: CN
Inventors: 邢连业
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-25
Filing date: 1995-03-25
Publication date: 1996-03-06
Anticipated expiration: 2005-03-25

Abstract

The utility model discloses a hammered type expansion screw bolt, being a structural improvement of a fastening screw bolt used for installing equipment. The utility model comprises a root of screw bolt body, one end of the screw bolt body is provided with a hole perpendicular to the end surface of the screw bolt body, 3 to 4 seams are arranged between the hole and an excircle to divide a circular ring body between an external wall of the screw bolt body and an external wall of the hole into equal portions, and a cylinder section of a conical cylinder body is inserted into a hole at the end surface of a screw bolt body. The utility model has the advantages that when the utility model is in use, no concrete placing is needed, and the utility model can be nailed up by a hammer and can not loose or fall off, the operation is convenient and the materials are saved.

Description

The hammering type EXPANSION ANCHOR BOLTS

The utility model relates to a kind of new structure of expansion fastener, is a kind of hammering type EXPANSION ANCHOR BOLTS specifically.

Install at equipment, during house decoration, often need be to hammering into links such as expansion clamping bolt, stone bolt on the wall He on the ground.The connection fastening piece that has is installed pretty troublesome, needs at the installation place placement of concrete, wait certain hour could use later, and size is long, and materials are many; What have directly hammers within the walls, but comparatively common shortcoming is that to bear pulling force little, uses the back loosening phenomenon often to occur.

The utility model purpose is in order to overcome the shortcoming in the above-mentioned technology, a kind of architecture advances is proposed the hammering type EXPANSION ANCHOR BOLTS, can hammer within the walls or ground fixed installation equipment, and can not becoming flexible with the direct hammering of hand hammer.

The utility model purpose is realized by following technological scheme: this hammering type EXPANSION ANCHOR BOLTS, include a body of bolt, an end face of the body of bolt have one with the vertical hole of body of bolt end face direction, between hole and cylindrical, there are 3～4 finedraws that the cirque body between the outer wall in body of bolt outer wall and hole is divided into the part that equates, in the hole of the shell portion inserting bolt body end face of a tapered cylindrical body.

The total length of tapered cylindrical body is than short 2～3 millimeters of the hole depth of body of bolt end face, the cone angle of cone with 25 °～40 ° for well.The diameter of body of bolt end-face hole is 0.4～0.7 of a body of bolt external diameter, the cylindrical section external diameter of tapered cylindrical body is more smaller than body of bolt end-face hole internal diameter, make cylindrical section inserting bolt body end-face hole not difficult, and do not rock after inserting, the circular cone end face maximum diameter of tapered cylindrical body equals body of bolt external diameter.The body of bolt does not have an end in hole to be shaped as the hammering head of the slyness that does not have screw thread, is convenient to the hammering type EXPANSION ANCHOR BOLTS within the walls or hammering in the ground, and can destroy screw thread.

When with hammering type EXPANSION ANCHOR BOLTS erection unit, according to body of bolt diameter and its length, on the wall or bore identical the giving of diameter on the mounting point on ground and box out, to be assembled together in the end patchhole that is inserted with the tapered cylindrical body of the hammering type EXPANSION ANCHOR BOLTS formed by the body of bolt and tapered cylindrical body again, beat the hammering head of the other end of the body of bolt with hammering.Hammering head shapes slyness does not have screw thread, can not destroy its screw thread when therefore beating.The hammering type EXPANSION ANCHOR BOLTS moves in the hole under external force.In the time of at the bottom of the top of tapered cylindrical body props up the hole, be subjected to stopping at the bottom of the hole, can not move inward, and have only the body of bolt in the hole, to move, the tapered cylindrical body enters in the aperture of the body of bolt, because the conical section tapering, make body of bolt end along the finedraw expansion of outwards splitting, play the effect of fastening hammering type EXPANSION ANCHOR BOLTS.Tapered cylindrical body length overall is than short 2～3 millimeters of body of bolt end face hole depth, when the hammering type EXPANSION ANCHOR BOLTS is inwardly knocked, when the end face of its tapered cylindrical body props up at the bottom of the hole, the body of bolt can not ejected.

The length thickness of hammering type EXPANSION ANCHOR BOLTS, decision is selected for use according to the erection unit needs.

The advantage of hammering type EXPANSION ANCHOR BOLTS is in use, does not need placement of concrete, and directly hammering just can be followed closely it firm, easy for operation; Because its structure is ingenious rationally, hammer in the hole, the diameter of the inside is bigger than the outside, thus can loose or dislocation, than usually foot bolt is short, save materials.

Embodiment of accompanying drawings.

Fig. 1 is the assembly structure figure of hammering type EXPANSION ANCHOR BOLTS,

Fig. 2, Fig. 3 are body of bolt plan view and side view,

Fig. 4 is the user mode figure after the hammering type EXPANSION ANCHOR BOLTS hammers into ground.

The hammering type EXPANSION ANCHOR BOLTS is formed by in tapered cylindrical body (1) inserting bolt body (2) one stomidiums.The cone angle of the conical section of tapered cylindrical body (1) is 30 °, and length is 15 millimeters, and body of bolt length is 80 millimeters, and diameter is 12 millimeters, and the diameter of the body of bolt one end boring is 8 millimeters, and hole depth is 18 millimeters.After it is knocked in ground, also have some gaps at the bottom of the cylinder end face of tapered cylindrical body and the hole.After hammering into ground, institute's installed device is tightened up with nut, pad.

Claims

1, a kind of hammering type EXPANSION ANCHOR BOLTS, include a body of bolt, it is characterized in that a end at bolt have one with the vertical hole of body of bolt end face direction, between hole and cylindrical, there are 3～4 finedraws that the cirque body between the outer wall in body of bolt outer wall and hole is divided into the part that equates, in the hole of the shell portion inserting bolt body end face of a tapered cylindrical body.

2, according to the described hammering type EXPANSION ANCHOR BOLTS of claim 1, it is characterized in that tapered cylindrical body total length than short 2～3 millimeters of the hole depth of body of bolt end face, cone section cone angle with 25 °～40 ° for well.

3, according to the described hammering type EXPANSION ANCHOR BOLTS of claim 1, the diameter that it is characterized in that body of bolt end-face hole is 0.4～0.7 of a body of bolt external diameter.

4,, it is characterized in that the circular cone end face maximum diameter of tapered cylindrical body equals body of bolt external diameter according to the described hammering type EXPANSION ANCHOR BOLTS of claim 1.

5,, it is characterized in that the body of bolt does not have an end in hole to be shaped as the hammering head of the slyness that does not have screw thread according to the described hammering type EXPANSION ANCHOR BOLTS of claim 1.