Patent ID: 6655183
Filing Date: 2003-12-02
Classification: B21D

Abstract:
A lifting mechanism for a head member of a pipe bender, comprisinga connecting block fixedly connected to a head member of a pipe bender; the connecting block being up and down movably disposed in a main body of the pipe bender with a connecting portion sticking out from the main body for connection to the head member; a propped block fixedly connected to a bottom of the connecting block; the propped block having a plurality of horizontal propped surfaces on a bottom thereof, the horizontal propped surfaces being formed at different heights with slopes formed in between; an oil cylinder horizontally fitted to the main body of the pipe bender; the oil cylinder having a piston rod; and, a pushing support connected to an outer end of the piston rod at a first end thereof; the pushing support being equipped with wheels at other end to face the slopes of the bottom of the propped block; whereby the head member can be adjusted in height together with the connecting block by means of operating the oil cylinder to move the wheels relative to the propped block to a selected one of the horizontal propped surfaces, allowing pipes fed from the main body to be shaped by a corresponding one of molding wheels on the head member in bending process.