CN2549246Y

CN2549246Y - Expansion screw

Info

Publication number: CN2549246Y
Application number: CN 02236386
Authority: CN
Inventors: 徐杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-28
Filing date: 2002-05-28
Publication date: 2003-05-07
Anticipated expiration: 2012-05-28

Abstract

The utility model relates to an expansion screw for fastening, mainly consisting of a bolt, an expansion tube and an expansion head. The outer periphery of the expansion head takes a taper shape, and the small head part of the expansion head is contacted with the inner wall of the expansion tube. The middle of the expansion head is hollow, and the hollow inner wall of the expansion head is provided with a screw thread which is connected with the screw thread of the bolt. when in use, a gasket and a spring gasket are firstly sleeved on the bolt; the bolt is then passed through a reversed hole of the fixed article; then the expansion tube and the expansion head are arranged; and finally the article can be fixed on the wall by tightly screwing the bolt clockwise after arranging the utility model inside a hole positioned on the wall.

Description

Setscrew

The utility model relates to a kind of fastening setscrew of using.

At present, known setscrew is made up of bolt, expansion tube and the nut of a band taper.The nut of this setscrew is owing to be located at the outside of the object that is fixed, after fixing, the object that is fixed tend to make bolt to expose a meropodium screw thread, and neither attractive in appearance, operation inconvenience again, especially when screw thread is damaged back or incorrect needs adjustment position is installed, then can't take out replacing.

The purpose of this utility model provides that a kind of manufacturing process is simple, cost is low, dress is got setscrew easily.

The purpose of this utility model is achieved like this: it mainly is made up of bolt, expansion tube and expansion-head.Described bolt is to adopt common standard part bolt; Described expansion tube is to have several openings on the periphery leg of hollow metal tube; Its outside of described expansion-head is taper, and inwall is provided with being threaded on screw thread and the bolt.

Owing to adopt such scheme, the utlity model has low cost of manufacture, easy for installation.

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

Fig. 1 is the utility model embodiment's a sectional view.

Fig. 2 is the A-A section of Fig. 1

1. bolts among the figure, 2. expansion tube, 3. expansion-head, 4. packing ring, 5. spring washer.

As shown in the figure, the utility model mainly is made up of bolt 1, expansion tube 2 and expansion-head 3.Described bolt 1 is to adopt common standard part bolt; Described expansion tube 2 is to have several openings on the periphery leg of hollow metal tube, and the length of opening is 1/2nd of expansion tube 2; The outside of described expansion-head 3 is taper, and the microcephaly position contacts with the inwall of expansion tube 2, is hollow in the middle of it, is provided with screw thread at its hollow inwall and is threaded with bolt 1.Earlier packing ring 4 and spring washer 5 are enclosed within on the bolt 1 during use, then bolt 1 is passed in the preformed hole of the object that is fixed, refill expansion tube 2 and expansion-head 3, put at last in the hole of wall bolt 1 clockwise direction is rotated, along with the rotation of bolt 1, the tip of expansion-head 3 is drawn in the inwall of expansion tube 2, under the effect of CONCENTRIC REDUCER, each opening of expansion tube 2 is opened, and can be fixed to object on the wall this moment.When the thread damage on the bolt 1 need be changed when maybe needing to adjust the position of the object that is fixed, as long as, when rotating to a certain degree, again bolt 1 is struck inward with bolt 1 rotation counterclockwise, make expansion-head 3 break away from expansion tube 2 inwalls, bolt 1 can take out with expansion tube 2.No matter the utility model is that installation or taking-up are very convenient, and manufacturing process is simple, and cost is low, good fixing effect.

Claims

A kind of setscrew, it comprises bolt (1), expansion tube (2) and expansion-head (3), it is characterized in that: the outside of described expansion-head (3) is taper, and the microcephaly position contacts with the inwall of expansion tube (2), in the middle of it is hollow, is provided with screw thread at its hollow inwall and is threaded with bolt (1).