CN2242990Y

CN2242990Y - Top-expansion type expansion bolt

Info

Publication number: CN2242990Y
Application number: CN 93239114
Authority: CN
Inventors: 赵新泰; 魏文魁
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-03
Filing date: 1993-08-03
Publication date: 1996-12-18
Anticipated expiration: 2003-08-03

Abstract

The utility model discloses a top-expansion type expansion bolt, relating to the technical field of fastening and connecting pieces. Objects can be safely and firmly fastened and connected by using the utility model. The utility model is technically characterized in that a stud is screwed in an expansion tube, a top ring is tightly pushed to force an expansion board to be expanded, a washer is installed on the stud, and screw nuts are installed on the stud. The utility model is suitable for various objects need fixing with firming and anchoring effects. The utility model is the expansion screw bolt having the advantage of convenient installation and use.

Description

The top-expansion type EXPANSION ANCHOR BOLTS

The utility model top-expansion type EXPANSION ANCHOR BOLTS relates to the fastening connection piece technical field, is applicable on the fastening object of various needs.

Existing domestic fastening piece swell fixture is made up of expansion sleeve and bolt, and its deficiency is in the installation exercise process, when bolt is pulled out, just can force expansion sleeve expansion type, reaches the purpose of fastening object.If the person of manipulating installs the position of swell fixture or the depth when undesirable, will appear at and take expansion sleeve when drawing screw rod out of, exist the effect that is fastenedly connected object that do not reach, the situation that the effect that perhaps is fastenedly connected is bad.Sometimes also occur when dismantling nut after, bolt also and then withdraws, and causes coming off of fixed object, has a kind of unsafe factor, the using scope of so just having limited to swell fixture.

The purpose of this utility model provides a kind of top-expansion type EXPANSION ANCHOR BOLTS, use this EXPANSION ANCHOR BOLTS have safe and reliable be firmly fastened to the effect that is connected object, be a kind of product easy to install.

The design (Fig. 1) of the utility model top-expansion type EXPANSION ANCHOR BOLTS is made up of double-screw bolt (1), packing ring (2), expansion tube (3), collar (4).Double-screw bolt (1) adopts steel to make, and at one end goes up mill off part screw thread and makes cross section formation oval Xing ， And that hexagon nut is housed.Porose loop pads in the middle of packing ring (2) is made with carbon steel.Expansion tube (3) adopts carbon steel to be processed into the tubular body of center hole, there are 3～6 to dilate plate on latter half of, this afterbody Lve Hou And flange that dilates plate, simultaneously, flange is arranged on the other end of expansion tube is pullover or do not have flange, middle punching press forms indent cloverleaf ， And and be processed with internal thread on the inwall of female parts, it and double-screw bolt are connected, and a collar (4) also is installed in the afterbody center hole.In the time of in double-screw bolt (1) screws in expansion tube, double-screw bolt just is connected And with screw-thread fit in the expansion tube and pushes up the latter half of collar of expansion tube center hole (4), thereby 3～6 of just touching on the afterbody of collar (4) dilate plate, make the inner hole wall that dilates plate and fixed object of expansion tube afterbody compress, and then reach the bolt group is anchored on the object.The object that needs are installed is contained on the double-screw bolt then, and by nut, packing ring (2) compresses and gets final product.Thereby reach the effect of anchoring object firmly.If as required, the user is following will unload bolt the time what need that fastening object is placed on flange, at this moment expansion tube also can not become flexible and influences the reliability of anchoring object.

The effect of the utility model top-expansion type EXPANSION ANCHOR BOLTS is compared with prior art, this product is owing to be equipped with collar (4) and packing ring (2) and be manufactured with flange on an end of expansion tube in expansion tube, so just, builder's Security and reliability have been strengthened, effect with firm anchoring object, promptly be to draw off bolt also can not influence the integral body loosening problem that comes off, it is top-expansion type EXPANSION ANCHOR BOLTS a kind of simple in structure, easy to install.

Fig. 1 is the structural drawing of the utility model top-expansion type EXPANSION ANCHOR BOLTS.

Fig. 2 is an A-A aspect sectional view among Fig. 1.

The embodiment of the utility model top-expansion type EXPANSION ANCHOR BOLTS is to be example with the top-expansion type EXPANSION ANCHOR BOLTS of producing  16 * 60mm, and describe processes in detail and connect and be: expansion tube (3) is selected the A of  16mm for use ₂Or A ₃Steel pipe manufacturing, its wall thickness are 2mm, and long is 50mm, and tube head is processed flange 90 degree on punch press, and the edge is 3mm.Simultaneously, pipe tail also flange 90 degree edges is 1mm, form long 46mm, then punch process is carried out at the middle part and make cloverleaf, its length is 15mm, and And tapping on endoporus forms internal thread, again the pipe tail slide is pressed and form square, long be 20mm, And mills Kai Sijiao, heat-treats just that to reach HB be that 110 degree and surface passivation are handled and made.Packing ring (2) is selected the standard piece of bd=12 for use.Double-screw bolt (1) adopts the standard piece of M12 * 60mm.Collar (4) is used A ₃It is  13mm that steel is processed into external diameter, and internal diameter is  6mm, and thick ring bodies for 5mm then increases roughness And the dilating in the plate of expansion tube afterbody of packing in the surface in order to increase friction factor, then double-screw bolt is screwed in the expansion tube, packing ring is contained on the double-screw bolt, and nut sleeve constitutes on double-screw bolt.It is manipulated and is: two objects that at first will be fixed are holed by  16.5mm, the degree of depth is arranged in pairs or groups on demand, total depth is 50mm, then EXPANSION ANCHOR BOLTS is inserted in the hole of fixed object, bolt on, reach the top and expand collar (4), force to dilate plate to the anchoring of expansion formation all around, loading onto then needs fixing object and packing ring (2) and nut ， And to screw to get final product.

Claims

1, a kind of top-expansion type EXPANSION ANCHOR BOLTS, by double-screw bolt, expansion tube and collar are formed, and it is characterized in that double-screw bolt (1) screws in the expansion tube (3), hold out against collar (4), force to dilate the plate distending, and packing ring (2) is contained on the double-screw bolt, and nut is contained on the double-screw bolt and constitutes.

2, EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that the expansion tube middle part is the indent cloverleaf, and its endoporus has internal thread And that flange is arranged on an end of expansion tube, have 3～6 to expand expansion oplate on the other end, the plate tail has flange, and collar (4) is installed in and dilates in the plate.