CN2096428U

CN2096428U - Core stick for soft elbow with expansion diameter

Info

Publication number: CN2096428U
Application number: CN 91217310
Authority: CN
Inventors: 李采云
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-05
Filing date: 1991-07-05
Publication date: 1992-02-19

Abstract

The utility model belongs to an elbow processing device, particularly a core stick for soft elbow with expansion diameter. Cup joint inner and outboard spiral bodies are respectively fixed with supporters and transmission shafts; a support jacket and a jaw clutch form integration; the rotation of the transmission shaft causes the diameter of the inner and outboard spiral bodies to distend outward, applies radial pressure to processed pipe walls and causes tubes deformation and bending. The utility model has the advantages of simple structure, convenient operation and high precision.

Description

Core stick for soft elbow with expansion diameter

The utility model belongs to processing unit (plant).

Russian Patent specification (patent No. is 946722) discloses a kind of bending method of pipe, it is to push the spring mandrel at tube cavity, when mandrel applies axial compressive force, with the axle is center rotation central spindle of the spring, radially revolves plus-pressure to pipe, by mold shape, pipe is deformed, its shortcoming is that mandrel ruptures when applying torsion easily.

The purpose of this utility model is to provide a kind of diameter telescopic flexible elbow plug.

The purpose of this utility model is to realize like this, the inside spin body places the inner edge of external spiral body, the one end joins and is integral, the other end joins with support set and power transmission shaft respectively, external spiral body and inner spiro body are cylindrical or cone-shaped, but the hand of spiral is opposite, rounded or the rectangle in cross section, one end of support set is half-clutch device, be meshed by jaw clutch breast wheel and another half-clutch device, installing one in a side of jaw clutch breast wheel can be around the draw key of little axle rotation, support set, the jaw clutch breast wheel, half-clutch device and stage clip are socketed on the power transmission shaft successively, and are adjusted nut and fix.

The utility model adopts the inside and outside conveyor screw that socket-connects, and is provided with jaw clutch between support set and transmission body, by the unidirectional torsion of power transmission shaft, impel inside and outside spirochetal diameter to expand outwardly gradually, plug is closely contacted with tube wall, improved the bend pipe machining accuracy, when stopping to add man-hour, but the backward rotation power transmission shaft, and in driving, the external spiral body is backward rotation also, make its reduced, so that plug is extracted out from pipe, it is simple in structure, easy to operate, the machining accuracy height.

Concrete structure of the present utility model accompanying drawing in conjunction with the embodiments is described further.

Fig. 1 is the utility model structure chart.

Fig. 2 is the inside and outside conveyor screw one end phase map interlinking (N of Fig. 1 is to view) of the utility model.

Fig. 3 is the utility model dog clutch features figure (M of Fig. 1 is to view).

One end of support set 5 is provided with half-clutch device 14, the two ends end face of jaw clutch breast wheel 10 is respectively arranged with asymmetric leg-of-mutton tooth, installing one in the one side can be around the draw key 8 of little axle 7 rotations, jaw clutch breast wheel 10 can be meshed with half-clutch device 9, support set 5, jaw clutch breast wheel 10 and stage clip 12 are socketed on the power transmission shaft 6 successively, being adjusted nut 13 fixes, half-clutch device 9 is fixed into one by slide key 11 and power transmission shaft 6, one end and the support set 5 of external spiral body 2 fix, the inside spin body 3 that the hand of spiral is opposite places the inner edge of external spiral body 2, one end and power transmission shaft 6 join, and fixed by pin 4, the other end is fixed into one with the other end of external spiral body 2, the profile of inside spin body 3 and external spiral body 2 is cylindrical or cone-shaped, its spring steel wire cross section is circle or rectangle, in use is pyramidal, during the external spiral body, its cone should be inverted socket, when power transmission shaft 6 being revolved when adding torsion and rotating, one end of draw key 8 and the groove on the half-clutch device 9 join, when counter-rotating power transmission shaft 6, one end of draw key 8 should join with the groove on the half-clutch device, after completion of processing, in inciting somebody to action, the external spiral body takes out from processed pipe fitting 1, and this device can be used for bending machine.

Claims

The telescopic flexible elbow plug of a kind of diameter is characterized in that:

A, the conveyor screw 3 that socket-connects and external spiral body 2, the one end joins and is integral, and the other end joins with support set 5 and power transmission shaft 6 respectively, and external spiral body 2 and inside spin body 3 are cylindrical or be cone-shaped, and the hand of spiral is opposite, and its section of steel wire is circle or rectangle,

One end of B, support set 5 is half-clutch device, and is meshed with half-clutch device 9 by jaw clutch breast wheel 10, in a side of jaw clutch breast wheel 10 draw key 8 that can rotate around little axle 7 is installed,

C, support set 5, jaw clutch breast wheel 10, half-clutch device 9 and stage clip 12 are socketed on the power transmission shaft 6, and are adjusted nut 13 and fix.