CN2775367Y

CN2775367Y - Novel controllable expanding screw

Info

Publication number: CN2775367Y
Application number: CN 200420010971
Authority: CN
Inventors: 王金明
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-07
Filing date: 2004-06-07
Publication date: 2006-04-26
Anticipated expiration: 2014-06-07

Abstract

The utility model relates to a novel controllable expansion screw which can effectively solve the problems of the difficulties of the disassembly and the assembly of expansion screws, long exposed thread sections and low fastness. The utility model has the structure that an outer tube is provided with an expansion clamp; inner screw threads are arranged on the rear part of the outer tube; a tube edge is arranged on the tail part of the outer tube; a thread section is arranged on the rear part of an inner thread; the expansion clamp is pushed to be installed for fixation through the inner thread. The utility model can be widely used for buildings, industries and domestic life. The utility model has the advantages of simple structure low cost, large expansion coefficients, high fastness, easy assembly and easy disassembly; besides, the utility model can be used repeatedly.

Description

Novel controllable expansion screw

One, technical field

The utility model belongs to novel controllable expansion screw.

Two, background technique

Setscrew is the common tool during people build, produce, live.Present setscrew is to promote expansion tube by the hexagonal silk to fix, mainly containing following disadvantages affect uses: 1, this setscrew pack into and screw after pull down very difficult, even pull down also and often body of wall is caused damage, the expansion thread distortion is serious, can not reuse.2, this expansion thread is packed into and is screwed the outside, back and must leave very long filament section, influences attractive in appearance or causes construction obstacle.3, soundness is not strong, and the appearance internal thread that has in the installation is loosening.

Three, model utility content

For overcoming present setscrew dismounting difficulty, outer Rose segment length, the deficiency that soundness is not strong, the utility model provide a kind of simple in structure, cost is low, soundness is strong, expansion coefficient is big, easily dress, readily removable, reusable, outer Rose's section be less or the novel controllable expansion screw that does not have.

The technological scheme that its technical problem that solves the utility model adopts is: novel controllable expansion screw is designed primarily to two-part: (1) outer tube, and outer tube is provided with inflating clip, and there is internal thread at the outer tube rear portion, afterbody is the pipe edge, (2) internal thread, internal thread rear portion are the silk section, and afterbody is square toes.Thereby novel controllable expansion screw expands setscrew is firmly fixing to the inflating clip that interior rotation promotes on the outer tube by internal thread in outer tube.

Novel controllable expansion screw easily adorns, readily removable, reusable.When novel controllable expansion screw is installed, can earlier outer tube be inserted and bore good porthole, then internal thread is inserted in the outer tube, pull the square toes of internal thread with spanner, allow internal thread in outer tube to interior rotation, internal thread can progressively be expanded the inflating clip on the outer tube, makes inflating clip by expanding to pipe is outer in the pipe, tightly block body of wall, thereby reach the good fastening effect of installation.When pulling down expansion thread, can be to the inner rotary internal thread, internal thread can progressively break away from the inflating clip on the outer tube, and inflating clip can lose the expansionary force of internal thread gradually, and under tension, inflating clip shrinks in the inlet pipe by pipe is outer, the expansion thread integral body that loses expansive force can be pulled out.Novel thus controllable expansion silk is in internal thread inward turning process, and is increasing to the expansionary force of inflating clip, also more and more firm, in internal thread outward turning process, inflating clip can lose outer tension force gradually, is convenient to expansion thread integral body and pulls out, so claim that this silk is novel controllable expansion screw.Installing and fixing and dismounting of novel controllable expansion screw is to finish with shrinking realization by the expansion of expansion thread inflating clip, and correct installation and dismounting can not cause damage to expansion thread and inflating clip, and expansion thread is reusable.

The outer Rose's section of novel controllable expansion screw less or do not have.Novel controllable expansion screw is fastening by the installation of internal thread inward turning, and in the fastening process of internal thread inward turning, outer Rose's section can be fewer and feweri.Under maximum dilatation, the outside is Rose's section not.

During novel controllable expansion screw was installed, soundness was strong, and expansion coefficient is big.The diameter of expansion thread inflating clip is fully expanded through internal thread only a little less than outer tube diameter, inflating clip to the outer maximum extension degree of pipe can near or be equivalent to outer tube diameter, inflating clip is to outer expand many more of pipe, expansion thread installation also just firm more firm and solid.

Novel controllable expansion screw can be made the expansion thread of differential profiles such as metal, plastics according to usage requirement owing to simple and reasonable for structure, also can be made into the expansion thread of different sizes, length, thickness specification.Inflating clip can design front portion, middle part or the afterbody at outer tube, can design one or more, and the shape of inflating clip is generally triangle body, also can be semicircular bodies, square body or the like.The outer tube head of expansion thread can seal, and also can not seal.The head of internal thread, best design are conehead, also can be designed to difformities such as round end, square toes, do not influence function of use substantially.The afterbody of internal thread is designed to square toes, mainly for the ease of with instruments such as spanner rotation internal thread, also can be designed to difformities such as hook according to usage requirement.

The beneficial effect of novel controllable expansion screw is:

1, disassemble or assemble are easy, and are reusable.

2, pack into after, outer Rose's section is less or do not have.Because internal thread inwardly rotates, outer Rose's section can be fewer and feweri.

3, expansive force is strong, and expansion coefficient is big, and is solid firm after installing.The thermal expansion of novel controllable expansion screw reaches substantially or is equivalent to outer tube diameter.

4, simple in structure, easily manufactured.

5, easy to operate, cost is low.

6, applied widely, can be made into different size, the expansion thread of differential profiles.

Four, description of drawings:

Below in conjunction with drawings and Examples the utility model is further specified.

Accompanying drawing 1 is the structure cross-sectional schematic of novel controllable expansion screw.

Accompanying drawing 2 is outer tube cross-sectional schematic of novel controllable expansion screw.

Accompanying drawing 3 is inflating clip cross-sectional schematic of novel controllable expansion screw.

Accompanying drawing 4 is internal thread cross-sectional schematic of novel controllable expansion screw.

Among the figure 1, outer tube; 2, outer tube internal thread, 3, inflating clip, 4, the internal thread conehead, 5, internal thread, 6, internal thread silk section, 7, the internal thread square toes, 8, the pipe edge.

Five, embodiment

Provided by Fig. 1, the utility model is that expansion thread outer tube (1) makes inflating clip (3), and outer tube (1) rear portion is outer tube internal thread (2), and outer tube (1) afterbody is pipe edge (8); There is internal thread silk section (6) at internal thread (5) rear portion, promoting inflating clip by internal thread installs and fixes, internal thread (5) head is internal thread conehead (4), internal thread (5) afterbody is internal thread square toes (7), outwards expand by make internal thread (5) inwardly rotate the inflating clip (3) that promotes on the outer tube (1) with instruments such as spanner rotation internal thread square toes (7), thus expansion thread is firmly fixing.

In embodiment illustrated in fig. 2, it is outer tube internal thread (2) that outer tube (1) is provided with two inflating clips (3) outer tubes (1) rear portion, and outer tube (1) afterbody is pipe edge (8).

In the embodiment shown in fig. 3, inflating clip (3) is a triangle body.

In the embodiment shown in fig. 4, internal thread (5) head is internal thread conehead (4), and internal thread (5) rear portion is an internal thread silk section (6), and internal thread (5) afterbody is internal thread square toes (7).The internal thread afterbody is designed to square toes, mainly for the ease of with instruments such as spanner rotation internal thread (5), also can internal thread (5) afterbody be designed to difformities such as hook according to usage requirement.

Claims

1, a kind of novel controllable expansion screw is characterized in that: the expansion thread outer tube makes inflating clip, and there is internal thread at the outer tube rear portion, and the outer tube afterbody is the pipe edge; There is the silk section at the internal thread rear portion, and it is fixing by dress to promote inflating clip by internal thread.

2, novel controllable expansion screw according to claim 1 is characterized in that the inflating clip that the expansion thread outer tube makes can be one or more, and the inflating clip body is a triangle body.

3, setscrew according to claim 1 is characterized in that: the afterbody of internal thread is square toes or hook-shaped.