CN2450430Y

CN2450430Y - Involute end expansion bolt

Info

Publication number: CN2450430Y
Application number: CN 00259271
Authority: CN
Inventors: 林富商
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-11-22
Filing date: 2000-11-22
Publication date: 2001-09-26
Anticipated expiration: 2010-11-22

Abstract

The utility model discloses an end part gradual expansion type expansion screw, which is characterized in that the other end of a screw thread rod is provided with a hole. One end of a multiple-angle nut is provided with a casing tube. Stones or other objects can be prevented from breaking while installing by using the end part gradual expansion type expansion screw. Construction time can be shortened. The utility model is characterized in time saving and convenient installation.

Description

End is the open form setscrew gradually

The utility model relates to the five metals material that is used for building decoration, and specifically a kind of improved end is the open form setscrew gradually.

Setscrew has been widely used in the location of various items and has hung at present, and it comprises a threaded stem, is provided with external screw thread in the shaft periphery, and at one end is provided with the taper expanded head; One is placed in the sleeve on the threaded stem, stretches out several bluff pieces backward in barrel forward end, and one is spun on the polygonal nut on the threaded stem; During practice of construction, on stone material or other object, bore a less hole earlier, with this setscrew with iron hammer be driven on stone material or other object than in the aperture, sleeve can tightly be stuck in the hole wall, rotate polygonal nut again, ordering about threaded stem moves axially, its taper expanded head outwards struts the bluff piece of sleeve, in the hole of strong fix on stone material or other object, owing to all can in hole, stay a bit of space after setscrew is fixing, so that can't be applicable to stone material than book, and the pulse strength that setscrew is produced when being driven into by iron hammer very easily causes stone material and some object fragmentations, wasted manpower, material resources and time.

The purpose of this utility model is to provide a kind of improved setscrew, and it can avoid stone material or other object that fragmentation takes place when mounted.

The technical solution of the utility model is achieved in that gradually open form setscrew of end, and it comprises a threaded stem, is provided with screw thread in the shaft periphery, and at one end is provided with the taper expanded head; One is placed in the sleeve on the threaded stem, stretches out several bluff pieces and grooving backward in barrel forward end, and one is spun on the polygonal nut on the threaded stem, it is characterized in that: the other end place at threaded stem establishes a hole, establishes a sleeve pipe at an end of polygonal nut.

The utility model is owing to establish a sleeve pipe at an end of polygonal nut, the other end place at threaded stem establishes a hole, directly be placed on sleeve and the nut that has sleeve pipe on the threaded stem during construction and installation, rotation has the nut of sleeve pipe then, make the taper expanded head of the bluff piece contact threaded stem of sleeve, with being about to whole setscrew directly inserts stone material or other object with manpower the hole that matches, make the bottom of the taper expanded head of threaded stem against hole, insert in the hole of threaded stem with instrument on the one hand again, avoiding threaded stem to be with by nut changes and withdraws from, rotate the nut that has sleeve pipe on the other hand, nut and the sleeve pipe that is connected as a single entity with it produce rotation and axial displacement, several microscler bluff pieces until sleeve are strutted outward by the expanded head of threaded stem, and the setscrew strong fix can avoid stone material or other object that fragmentation takes place when mounted, be fit to produce in batches, with low cost, can shorten the engineering time in addition, have and save time, the characteristics of being convenient to install.

Fig. 1 is the three-dimensional exploded view of existing setscrew

Fig. 2 is the utility model one embodiment's a three-dimensional exploded view

Fig. 3 is the construction schematic representation of Fig. 2

Fig. 4 finishes schematic representation for the construction of Fig. 2

Fig. 5 installs the schematic representation of suspension bracket additional for Fig. 4

Fig. 6 is another embodiment's of the utility model a three-dimensional exploded view

Fig. 7 is with the schematic representation of the sleeve set among Fig. 6 on threaded stem

The utility model will be further described below in conjunction with drawings and Examples.

The utility model comprises a threaded stem 1, is provided with external screw thread in the shaft periphery, and at one end is provided with taper expanded head 5; One is placed in the sleeve 2 on the threaded stem 1, stretch out several bluff pieces 3 and grooving 9 backward at sleeve 2 front ends, one is spun on the polygonal nut 4 on the threaded stem 1, it is different from prior art and is: establish a hole 6 at the other end place of threaded stem 1, the instrument that Gong matches in this hole inserts, to prevent that threaded stem is with commentaries on classics and is withdrawed from when rotating polygonal nut; Establish a sleeve pipe 7 at an end of polygonal nut 4, this sleeve pipe 7 is connected as a single entity with polygonal nut 4, sleeve pipe 7 can touch sleeve 2 when construction and installation, nationality rotates polygonal nut 4, can stablize the expanded head 5 that promotes sleeve 2 past threaded stems 1 and carry out axial displacement, and force each bluff piece 3 of sleeve 2 to expand outwardly, reach firm locating effect rapidly, the diameter of this sleeve pipe 7 matches with the diameter of polygonal nut 4 in an embodiment, and on same center hole, establish a neck that dwindles 8 at threaded stem 1 one end taper expanded head 5 places in a further embodiment, before deviate from threaded stem to avoid sleeve, engagement tool in the use is generally hexagon, therefore the hole 6 of establishing at the other end place of threaded stem 1 can be a hexagonal screw, in order to increase the frictional force between sleeve and the hole wall, an opening 10 is arranged on sleeve 2 among another embodiment, this opening can cut along the grooving in the sleeve grooving; During this external construction, threaded stem 1 with can be to exposing outside, polygonal nut 4 can cooperate the slotted hole 12 of suspension bracket 11, and then adopts set screw nut 13 to position.

Claims

1, end open form setscrew gradually, it comprises a threaded stem, is provided with screw thread in the shaft periphery, and at one end is provided with the taper expanded head; One is placed in the sleeve on the threaded stem, stretches out several bluff pieces and grooving backward in barrel forward end, and one is spun on the polygonal nut on the threaded stem, it is characterized in that: the other end place at threaded stem establishes a hole, establishes a sleeve pipe at an end of polygonal nut.

2, press gradually open form setscrew of the described end of claim 1, it is characterized in that: the diameter of this sleeve pipe matches with the diameter of polygonal nut, and on same center hole.

3, press gradually open form setscrew of the described end of claim 1, it is characterized in that: one end taper expanded head place establishes a neck that dwindles at threaded stem.

4, press gradually open form setscrew of the described end of claim 1, it is characterized in that: the hole of establishing at the other end place of threaded stem can be a hexagonal screw.

5, press gradually open form setscrew of the described end of claim 1, it is characterized in that: an opening is arranged on sleeve, and this opening can cut along the grooving in the sleeve grooving.