CN2230840Y

CN2230840Y - Expanded screw

Info

Publication number: CN2230840Y
Application number: CN 94212214
Authority: CN
Inventors: 钟长柱
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-13
Filing date: 1994-05-13
Publication date: 1996-07-10
Anticipated expiration: 2004-05-13

Abstract

The utility model discloses an omnidirectional expansion screw bolt, being composed of a taper head screw bolt, a column-shaped tube expansion body, a taper step convex shim, an open elastic shim and a screw cap. The utility model solves the defects of the expansion body of the expansion screw bolt of the prior art that a single head expands, the fastening area is small and the performance is single. The whole expansion body of the omnidirectional expansion screw bolt can expand, and the fastening area between the expansion body and two holes is large. The utility model bears more pull than the existing expanded screw bolt, can automatically set position and correct the concentricity of the two holes and is used as a positioning pin. The utility model is widely used for connecting and fastening plastic objects, metal objects, architecture objects and decoration objects. The utility model has the notable advantages that the expansion body is made of the leftover bits and pieces, a great amount of lumber raw materials are saved, the processing steps are fewer and the cost is low.

Description

Comprehensive EXPANSION ANCHOR BOLTS

The utility model is a kind of comprehensive EXPANSION ANCHOR BOLTS, and the object that is widely used in plastics, metal, building, finishing connects, fastening, can locate automatically, proofreaies and correct the concentricity in two holes, and the anchor bolt that also can be used as locating stud and fixed equipment uses.

Present known EXPANSION ANCHOR BOLTS, expander single head expand, poor performance, and operation is many, the cost height, use be the raw material of becoming a useful person.

As everyone knows, traditional expansion bolt, by comprising the tapering hook bolt, single head is opened the cylindrical tube expander of expansion hatch, and pad, opening resilient pad, nut are formed; Nut is stressed to be tightened, and the expander single head expands, and is fastened in the object hole, but still has following some deficiency technically:

1. expansion coefficient is little, few with thing wall area of contact;

2. can not use and often wave, on the object that rocks, as fixing electric fan etc.;

3. performance is single.

The purpose of this utility model provides a kind of comprehensive EXPANSION ANCHOR BOLTS, expander all expands, can reach 85% with the area of contact in hole, can locate automatically, imitate the just concentricity of two object attachment holes, particularly imitate the just concentricity of two pores, the most significant is that can to make full use of the inferior horn rim charge be raw material, saves a large amount of raw material of becoming a useful person.

The utility model is achieved in that comprehensive EXPANSION ANCHOR BOLTS is by comprising that tapering hook bolt, cylindrical tube expander, tapering step convex pad, opening resilient pad, nut, opening jump ring or rubber ring, paper, cloth, adhesive tape are formed; The utility model, the tapering hook bolt tightens by nut, tapering step convex pad compresses inward, cylindrical tube expander transverse ends is stressed, expander begins to expand along tapering step convex pad step cylindrical tapering and tapering head 4 bolt cylindrical taperings with fixed object, and the outer wall of each blade tightly by ordering hole wall, is combined into an integral body with the hole, thereby reach comprehensive expansion purpose, realized its various functions.

Special way of the present utility model is: described cylindrical tube expander is by a plurality of circular arc degree, length, the single blade that has the spill annular groove that thickness equates is formed, a plurality of blades fixedly be with opening jump ring or rubber ring, paper, cloth, it is whole that adhesive tape fixedly becomes a pipe, the assembling of cylindrical tube expander is to be assembled by a plurality of blades, the quantity of blade can be selected arbitrarily between the 2-10 sheet, but must guarantee that after any several blade assembling be a cylindrical tube, the cylindrical tube expander of forming by multiple-blade, the inside classical prescription of warp outside is to the annular groove towards 1-4 bar spill, wide opening jump ring or the rubber ring end face diameter of being slightly larger than of groove depth, this operation are shaped when being punching press list blade; The used raw material of blade are thickness steel plate inferior horn rim charges between 0.8mm-4.5mm, have saved the raw material of becoming a useful person in a large number, and cost is low, and manufacturing procedure is few; Described tapering step convex pad, the cylindrical of step is a tapering shape, young root is big, step taper is selected arbitrarily between the 20-60 degree, tapering head top diameter must be less than cylindrical tube expander internal diameter 0.3mm, and tapering head diameter at butt end must be greater than cylindrical tube expander external diameter 0.5mm-3.5mm, and the manufacturing of tapering step convex pad is on the basis of making common pad, do not increase any materials, at tapering step of pad endoporus punching press.

The drawing figure of accompanying drawing is as follows:

Fig. 1: comprehensive EXPANSION ANCHOR BOLTS ssembly drawing;

Fig. 2: tapering hook bolt front view,

Fig. 3: the round firmly shape tube swelling body front view of six blades after the assembling,

Fig. 4: tapering step convex pad sectional view,

Fig. 5: six square nut sectional views,

Fig. 6: opening resilient pad front view,

Fig. 7: two blade cylindrical tube expander front views after opening jump ring or the rubber ring assembling,

Fig. 8: three blade cylindrical tube expander front views after the assembling,

Fig. 9: opening jump ring front view,

Each label declaration is as follows among the figure:

The 1-taper bolt, 2-cylindrical tube expander assembling back is whole, 3-tapering step convex pad, 4-opening resilient pad, 5-six square nuts, the object of 6-opening jump ring or rubber ring, the brand-name paper of printing, cloth, adhesive tape stator blade, 7,8-identical radian measure, length, thickness, have the blade single piece body of Baltimore groove.

Be described in detail the example of model utility in conjunction with the accompanying drawings

Referring to Fig. 1: putting in order of this full side's EXPANSION ANCHOR BOLTS is that expander 2 is enclosed within and adds tapering step convex pad 3, resilient pad 4, six square nuts 5 on the tapering hook bolt; Tapering hook bolt 1 tightens by six square nuts, tapering step convex pad 3 compresses inward, six blade cylindrical tubes expand and whole 2 lateral stressedly to begin to expand along tapering step convex pad 3 cylindrical taperings and tapering hook bolt 1 cylindrical tapering, the expand object of whole 2 fixed outside of six blade cylindrical tubes expands, six blades expand, and, realize its various functions tightly by ordering the object hole wall.

Referring to this six blades cylindrical tube expander section of Fig. 3 is annulus, and each of composition annulus is little disconnected fan-shaped, and radian, thickness, spill annular groove equate; The blade single piece body 7.8 used raw materials that radian, length, thickness, spill annular groove equate are the offal rim charge of A3 steel and various steel plates, and according to body diameter, the blade number is made corresponding radian by punching press; The a plurality of blades that have the spill annular groove that made radian, length, thickness equate constitute cylindrical tubes, fixedly become cylindrical tube expansion integral body 2 with opening jump ring or rubber ring, the brand-name paper of printing, cloth, adhesive tape.Referring to Fig. 4 tapering step convex pad, be on the common pad of making basis, not increase any materials, do not increase any equipment, form at a tapering shape of pad endoporus punching press step.

Traditional expansion bolt is made, and needs thread-rolling machine, punch press, milling machine, blanking machine, drilling machine, six kinds of equipment of lathe, and device therefor is many, manufacturing procedure is many; Only need thread-rolling machine, two kinds of equipment of punch press and make comprehensive EXPANSION ANCHOR BOLTS.

Referring to Fig. 7, Fig. 8 as can be known, cylindrical tube expander of the present utility model can be made two blades, three blades or other multiple-blade cylindrical tube expander.

Claims

1. comprehensive EXPANSION ANCHOR BOLTS, by comprising the tapering hook bolt, the cylindrical tube expander, tapering step convex pad, the opening spring sheet, nut, opening jump ring or rubber ring, paper, cloth, adhesive tape is formed, it is characterized in that: described cylindrical tube expander is by a plurality of circular arc degree, length, the spill annular groove blade that has that thickness equates is formed, a plurality of blades fixedly be with opening jump ring or rubber ring, print brand-name paper, cloth, adhesive tape fixedly becomes cylindrical tube integral body, the assembling of cylindrical tube expander is to be assembled by a plurality of blades, and the quantity of blade can be selected arbitrarily between the 2-10 sheet.

2. according to the described comprehensive EXPANSION ANCHOR BOLTS of claim 1, it is characterized in that: the tapering of described tapering step convex pad is between the 20-60 degree, the tapering top diameter is less than the 0.3mm of cylindrical tube expander internal diameter, and the tapering diameter at butt end is greater than the 0.5-3.5mm of cylindrical tube expander external diameter.