Tube expander

Abstract

A tube expander including: a main body, two opposite clamping blocks being disposed under a bottom of the main body, the two clamping blocks defining therebetween an insertion space in which a copper tube can be clamped; and a bolt screwed through the main body. One end of the bolt, which extends out of the main body, has a rotary switch. A top face of the rotary switch is formed with a polygonal socket in which a connecting member is accommodated. The connecting member is easily connectable with a mechanical power source for conveniently and quickly ascend/descending the bolt within the insertion space of the main body.

1 . A tube expander comprising: 
 a main body, two opposite clamping blocks being disposed under a bottom of the main body, the two clamping blocks defining therebetween an insertion space; and    a bolt screwed through the main body, one end of the bolt, which extends into the insertion space, having a conic body, the other end of the bolt, which extends out of the main body, having a rotary switch, one face of the rotary switch distal from the conic body being formed with a connecting section for connecting with a power source.    
   
   
       2 . The tube expander as claimed in  claim 1 , wherein the connecting section of the bolt is connectable with a connecting member connectable with the power source.  
   
   
       3 . The tube expander as claimed in  claim 2 , wherein the connecting section of the bolt is a polygonal socket and the connecting member has a polygonal block corresponding to the polygonal socket of the bolt and a coupling section for coupling with the power source, whereby the polygonal block of the connecting member can be inserted in the polygonal socket of the bolt.  
   
   
       4 . The tube expander as claimed in  claim 3 , wherein the polygonal socket of the bolt is a square socket and the polygonal block of the connecting member is a quadrangular column corresponding to the square socket.  
   
   
       5 . The tube expander as claimed in  claim 1 , wherein a locating bolt is perpendicularly screwed through one of the clamping blocks of the main body.