CN2226669Y

CN2226669Y - Dismounting expansion screw

Info

Publication number: CN2226669Y
Application number: CN 95244566
Authority: CN
Inventors: 顾洪昌
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-17
Filing date: 1995-08-17
Publication date: 1996-05-08
Anticipated expiration: 2005-08-17

Abstract

The utility model discloses a dismountable expansion screw nail, belonging to the technical field of a fastening, a connecting, a dismounting or a clamping tools. The utility model is composed of a conical screw nut 1, a screw rod 2, a nut cap 3, a spring 4, a plurality of expansion sheets 5, a sleeve tube 6 and a spring wire 7. The utility model is characterized in that the conical screw nut 1 with a plurality of blades 8 and the separated type expansion sheets 5 are adopted to replace a conical screw nut and an expansible sleeve tube of the prior art, and the simultaneous rotation of the conical screw nut and the screw rod is effectively prevented. The utility model which has the advantages of simple structure, convenient dismounting, low cost, etc. is a relatively ideal dismountable expansion screw nail.

Description

Assembling and disassembing expanding screw

The utility model relates to a kind of removable screw mandrel formula swell fixture, it belong to other class not to be covered be used for fastening, connect, dismounting or clamping tools or bench device technical field.

The assembling and disassembing expanding screw that in CN92221416.6, discloses, sometimes owing to error in the internal and external threads manufacturing, can not finely mesh, or wedge nut and screw mandrel get rusty sometimes and bond together, and when the turn cap, screw mandrel and wedge nut rotate simultaneously, can produce skidding, wedge nut is with respect to the screw mandrel displacement of not rising like this, and wedge nut just can not make can expand casing expandable, does not have the effect of swell fixture.

The purpose of this utility model is to overcome deficiency of the prior art and the assembling and disassembing expanding screw that matches of tapered cup nut of a kind of split type intumescent sheet and band blade is provided.

Task of the present utility model is finished by following measures; A kind of removable swell fixture is made up of tapered cup nut, screw mandrel, some intumescent sheets, sleeve pipe, spring thread etc., the wedge mouth place of tapered cup nut has several uniform blades, play a protrusion effect, each sheet of some intumescent sheets is all identical, elongated post shelly, some intumescent sheet obvolvents become the cylinder shelly, play a part to expand sleeve pipe, end the right and left of every intumescent sheet has prominent hook, so that hook the protrusion blade of tapered cup nut, stop tapered cup nut and screw mandrel to rotate simultaneously; The other end has an arc groove near on the convex surface of termination, and the baby hem of being convenient to sleeve pipe embeds wherein, plays the effect of tightening up some intumescent sheets.Characteristics of the present utility model are exactly to adopt the tapered cup nut of some split type intumescent sheets and band blade to replace expanding sleeve pipe and wedge nut, can effectively stop tapered cup nut and screw mandrel to rotate simultaneously.

Accompanying drawing 1 is embodiment 1 a structure assembling schematic representation;

Accompanying drawing 2 is every intumescent sheet (a 5) structural drawing;

Accompanying drawing 3 is the axisymmetric sectional drawing of tapered cup nut (1);

Accompanying drawing 4 is that blade (8) is along circumferential distribution map;

Accompanying drawing 5 is the structure three-view diagram of sleeve pipe (6);

Accompanying drawing 6 is embodiment 2 a structure assembling schematic representation.

The utility model describes in detail embodiment below with reference to accompanying drawing; Embodiment 1, a kind of assembling and disassembing expanding screw, and as shown in Figure 1, it is made of tapered cup nut 1, screw mandrel 2, cap 3, spring 4, some intumescent sheets 5, sleeve pipe 6, spring threads 7.Tapered cup nut 1 has several uniform blades 8 at wedge mouth place shown in accompanying drawing 3,4, several are taken as 3 among this embodiment, rotates simultaneously in order to prevent tapered cup nut 1 and screw mandrel 2, and tapered cup nut 1 has designed three blades 8, and blade 8 plays protrusion.Some intumescent sheets 5 also are taken as 3 in this embodiment, three all elongated post shellies of intumescent sheet 5 then, as shown in Figure 2, become a cylinder shelly after three intumescent sheet 5 obvolvents, be equivalent to expand the effect of sleeve pipe, end the right and left of every intumescent sheet 5 has prominent hook 9, and prominent hook 9 does not allow tapered cup nut 1 and screw mandrel 2 rotate simultaneously in order to hook the protrusion blade 8 of tapered cup nut 1; The other end has an arc groove 10 near on the convex surface of termination, has an arc groove 11 on the convex surface of intermediate portion.Sleeve pipe 6 is the pipe that two ends have

big baby hem

12,13, as shown in Figure 5, big flanging 12 is in order to increase the area of contact with cap 3, and baby hem 13 plays the effect of tightening up three split type intumescent sheets 5 in the arc groove 10 that can be embedded in three intumescent sheets 5.Concrete assembling is as follows: an end of screw mandrel 2 and cap 3 are by threaded engagement, for tight engagement, have spring 4 therebetween, the other end of screw mandrel 2 is equipped with sleeve pipe 6 successively, three intumescent sheets 5, tapered cup nut 1, the big flanging 12 of sleeve pipe 6 is adjacent with cap 3, an end that has arc groove 10 of three intumescent sheets 5 all stretches in the sleeve pipe 6, the baby hem 13 of sleeve pipe 6 is embedded in phase interlock in the arc groove 10, play the effect of tightening up three split type intumescent sheets 5, three intumescent sheet 5 obvolvents become the cylinder shelly, three blades 8 of tapered cup nut 1 drop on respectively adjacent two intumescent sheets 5 about between the prominent hook 9 and cooperatively interact, after the assembling, for three intumescent sheets 5 are disperseed, a spring thread 7 is embedded in the arc groove 11 of three intumescent sheets 5, play the loose effect of tying up.Embodiment 2: adopt hex head bolt 14 and nut collar 15 to substitute screw mandrel 2, cap 3, spring 4, this embodiment is that the internal thread by tapered cup nut 1 is meshed with the outside thread of hex head bolt 14, constitute screw pair, concrete assembling is as follows, nut collar 15, sleeve pipe 6, three intumescent sheets 5, tapered cup nut 1, spring thread 7 are housed successively, as shown in Figure 6 on hex head bolt 14.After swell fixture assembles, the fixture of can going here and there is put into swell fixture at the hole of wall, fixture is embedded between wall and the nut collar 15, have only the hexagon nut and the nut collar 15 of hex head bolt 14 to be exposed at outside the fixture, only need to be wrenched hex head bolt 14 with spanner, fixture just can be securely fixed on the wall; If unload fixture, only need unscrew hex head bolt 14 and separate with tapered cup nut 1 and can unload fixture.And swell fixture can continue to use, even intumescent sheet 5 damages, also only need change that a slice of damage.

The utility model is simple in structure, novel, improves practicality, have elegant in appearance, Uniform, easy accessibility, manufacturing facility, low cost and other advantages are a kind of comparatively reasons The assembling and disassembing expanding screw of thinking.

Claims

1, a kind of assembling and disassembing expanding screw that has tapered cup nut (1), screw mandrel (2), cap (3), spring (4), of the present utility modelly be characterised in that it also has some intumescent sheets (5), sleeve pipe (6), spring thread (7) to constitute, above-mentioned tapered cup nut (1) has several uniform blades (8) at wedge mouth place; The all elongated post shelly of some intumescent sheets (5), become the cylinder shelly after the obvolvent, end the right and left of every intumescent sheet (5) has prominent hook (9), and the other end has an arc groove (10) near on the convex surface of termination, has an arc groove (11) on the convex surface of intermediate portion; Sleeve pipe (6) is the pipe that two ends have big baby hem (12,13); One end of screw mandrel (2) and cap (3) are by threaded engagement, have spring (4) therebetween, the other end of screw mandrel (2) is equipped with sleeve pipe (6) successively, some intumescent sheets (5), tapered cup nut (1), the big flanging (12) of sleeve pipe (6) is adjacent with cap (3), the end that some intumescent sheets (5) have arc groove (10) all stretches in the sleeve pipe (6), the baby hem (13) of sleeve pipe (6) is embedded in the interior phase interlock of arc groove (10), some intumescent sheets (5) obvolvent becomes the cylinder shelly, several blades (8) of tapered cup nut (1) drop on respectively adjacent two intumescent sheets (5) about between the prominent hook (9) and cooperatively interact, a spring thread (7) is embedded in the arc groove (11) of some intumescent sheets (5).

2, assembling and disassembing expanding screw according to claim 1 is characterized in that the internal thread of above-mentioned tapered cup nut (1) also can be meshed with the outside thread of hex head bolt (14), constitutes screw pair.