CN208702858U - Setscrew after installation convenient for extracting - Google Patents

Abstract

The utility model discloses the setscrews after a kind of installation convenient for extracting, including housing and threaded rod, coat suit is in outside threaded rod, the first end of housing is equipped with multiple circumferentially distributed expanse pieces, the first end of threaded rod is equipped with the expansible plug that diameter becomes larger from inside to outside, and the outer circumferential walls of its close second end are equipped with external screw thread on the outer wall of threaded rod；The circumferential inner wall put on outside close to its second end is equipped with internal screw thread, and the internal screw thread of housing and the external screw thread of threaded rod are connected with each other, and the second end of housing is equipped with the annulus of extension, and the second end of threaded rod is equipped with the rotary driving part for cooperating with rotary drive tool.The internal screw thread that the utility model passes through circumferential inner wall setting and shaft in housing, and rotary driving part is set on threaded rod, to which installation setscrew can be stablized, setscrew can be relatively easily extracted again, it is not only easy to use, wall will not be damaged, and is easy to extract reuse and economizes on resources.

Description

Setscrew after installation convenient for extracting

Technical field

The expansion that the utility model relates to extract after a kind of setscrew of metal production more particularly to a kind of installation Screw.

Background technique

Setscrew includes plastics and metal material, the former fastening force is smaller, and the latter's fastening force is larger, is widely used, this What is involved is metallic expansive screws for utility model.The fixation of setscrew is that expansion is promoted to generate friction using wedge-shaped gradient Power reaches fixed effect.

Conventional expanded screw includes housing, threaded rod and nut, and one end of housing is equipped with multiple circumferentially distributed expansions and expands Piece is opened, threaded rod outer wall is equipped with external screw thread and one end is equipped with the expansible plug that diameter becomes larger, the big end outer diameter of expansible plug Greater than the outer diameter of housing, threaded rod passes through housing and makes expanse piece of the small end of its expansible plug close to housing, nut suit Outside threaded rod.In use, the entire setscrew after assembling is squeezed on wall the expansible plug in preset hole and making threaded rod It is placed in most the inside, then rotating nuts, nut rotation is displaced outwardly threaded rod, and expansible plug, which is displaced outwardly, expands the expansion of housing Piece is opened by spreading, so that entire setscrew be made to be tightly secured on wall.

Conventional expanded screw is since its expanse piece is difficult to restore after spreading, so always can be by card after insertion wall Firmly, it to pull out extremely difficult or pull out outward (be difficult to extract) with strength or wall screw periphery is dug wide or allows it It stays in wall.Need to extract setscrew certain to realize and reuse purpose occasion, conventional expanded screw is not used only Inconvenience damages wall, and reuses and waste of resource because cannot extract.

Utility model content

The purpose of this utility model is that solve the above-mentioned problems and provides the expansion after a kind of installation convenient for extracting Screw.

The utility model achieves the above object through the following technical schemes:

Convenient for the setscrew extracted, including housing and threaded rod after a kind of installation, the coat suit is in the screw thread Outside bar, the first end of the housing is equipped with multiple circumferentially distributed expanse pieces, and the first end of the threaded rod is equipped with by interior And the expansible plug that overall diameter becomes larger, external screw thread is equipped with close to the outer circumferential walls of its second end on the outer wall of the threaded rod； The outer circumferential inner wall for putting on its close second end is equipped with internal screw thread, the outer spiral shell of the internal screw thread of the housing and the threaded rod Line is connected with each other, and the second end of the housing is equipped with the annulus of extension, and the second end of the threaded rod is equipped with for driving with rotation The rotary driving part of power driven tools cooperation.The annulus of housing second end has the function of sand and beauty.

The setscrew further includes nut, and the nut is loaded on the threaded rod and is located at by itself inner screw sheath Outside the annulus of the housing.After setscrew is embedded in wall, the nut is mainly used for the fixed object for needing fixation.

Preferably, the second end of the threaded rod is equipped with the rotary shaft for cooperating with spanner, the rotary shaft is cut Face is rectangle or class ellipse, its two opposite long side is the straight line being parallel to each other when being class ellipse.This structure is just In processing and also it is easy to use.According to the actual application, rotary shaft may be other is used for rotary drive tool such as It can be spanner, the rotary driving part of cooperations such as to be cut such as can be hexagon column, hexagon counterbore, cross counterbore etc..

The utility model has the beneficial effects that:

The internal screw thread with shaft is arranged by the circumferential inner wall in housing in the utility model, and sets on threaded rod Rotary driving part is set, it is swollen installing so as to realize the relative movement between threaded rod and housing by rotating threaded rod It is displaced outwardly threaded rod when swollen screw or moves inward housing, so that expansible plug be driven to be displaced outwardly or drive expanse Piece moves inward and makes the expanse piece of housing by spreading, realizes and stablizes installation function, makes screw thread when extracting setscrew Bar moves inward or is displaced outwardly housing, to drive expansible plug to move inward or drive expanse piece to be displaced outwardly and make The expanse piece of housing loses support, then only needs low-force amount that can extract setscrew, not only easy to use, will not damage Bad wall, and be easy to extract reuse and economize on resources.

Detailed description of the invention

Fig. 1 is after installation described in the utility model convenient for the three-dimensional structure diagram before the setscrew assembling extracted；

Fig. 2 is after installation described in the utility model convenient for the three-dimensional structure diagram after the setscrew assembling extracted.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing:

It as depicted in figs. 1 and 2, include housing 4, threaded rod convenient for the setscrew of extraction after installation described in the utility model 8 and nut 1, the housing 4 be set in outside threaded rod 8, the first end (lower end in figure) of housing 4 is equipped with multiple circumferentially distributed swollen Swollen expanding plate 5, the first end (lower end in figure) of threaded rod 8 are equipped with the expansible plug 9 that diameter becomes larger from inside to outside, threaded rod 8 Outer wall on close to the outer circumferential walls of its second end (upper end in figure) be equipped with external screw thread 7, the second end of threaded rod 8 be equipped with for The rotary shaft 6 of spanner cooperation, the section of rotary shaft 6 are that class is oval (or rectangle), such ellipse it is opposite two A long side is the straight line being parallel to each other；It is equipped with internal screw thread 2 close to the circumferential inner wall of its second end (upper end in figure) on housing 4, outside The internal screw thread 2 of set 4 and the external screw thread 7 of threaded rod 8 are connected with each other, and the second end of housing 4 is equipped with the annulus 3 of extension, and nut 1 passes through Itself inner screw sheath is loaded on threaded rod 8 and is located at outside the annulus 3 of housing 4.

As depicted in figs. 1 and 2, when installation, setscrew is first assembled into Fig. 2 pattern, then beats entire setscrew Enter on wall in preset hole and the expansible plug 9 of threaded rod 8 is made to be placed in most the inside, then rotates the rotary shaft on rotating threaded rod 8 6, it is displaced outwardly threaded rod 8, expansible plug 9, which is displaced outwardly, makes the expanse piece 5 of housing 4 by spreading, to make entirely to expand Screw is tightly secured on wall, is inserted into after then fixed object being needed to have openning hole again from the second end of threaded rod 8, is used nut 1, which packs into the rotation of threaded rod 8, fixes object.When extraction, first nut 1 is removed, threaded rod 8 is then reversely rotated, makes screw thread Bar 8 moves inward, if expansible plug 9 itself pushes against bottom hole within the walls, housing 4 can be made to be displaced outwardly, expansible plug 9 move inward or Expanse piece 5, which is displaced outwardly, separates the expanse piece 5 of housing 4 with expansible plug 9, and expanse piece 5 is made to lose internal branch Support only slightly need to firmly be pulled outwardly, can extract entire setscrew, because the stress of expanse piece 5 itself is little, compared with Deformation when small strength can make it restore installation.

Above-described embodiment is the preferred embodiment of the utility model, is not the limit to technical solutions of the utility model System, as long as being regarded as falling into without the technical solution that creative work can be realized on the basis of the above embodiments In the rights protection scope of the utility model patent.

Claims (3)

1. the coat suit is in the threaded rod convenient for the setscrew extracted, including housing and threaded rod after a kind of installation Outside, the first end of the housing is equipped with multiple circumferentially distributed expanse pieces, the first end of the threaded rod be equipped with by interior and The expansible plug that overall diameter becomes larger is equipped with external screw thread close to the outer circumferential walls of its second end on the outer wall of the threaded rod；Its Be characterized in that: outer put on is equipped with internal screw thread, the internal screw thread of the housing and the spiral shell close to the circumferential inner wall of its second end The external screw thread of rasp bar is connected with each other, and the second end of the housing is equipped with the annulus of extension, and the second end of the threaded rod, which is equipped with, to be used In the rotary driving part cooperated with rotary drive tool.

2. the setscrew after installation according to claim 1 convenient for extracting, it is characterised in that: the setscrew also wraps Nut is included, the nut is loaded on the threaded rod by itself inner screw sheath and is located at outside the annulus of the housing.

3. the setscrew after installation according to claim 1 or 2 convenient for extracting, it is characterised in that: the threaded rod Second end is equipped with the rotary shaft for cooperating with spanner, and it is that class is oval that the section of the rotary shaft, which is rectangle or class ellipse, Its two opposite long side is the straight line being parallel to each other when shape.