Patent ID: 6252193
Filing Date: 2001-06-26
Classification: B23K

Abstract:
An electric welding machine comprising:at least two gun arms each having electrodes at tip ends thereof which oppose each other, the gun arms being connected to each other at a connection part on which at least one of the gun arms is rotatably pivoted;a reduction gear disposed separately from the connection part of the gun arms, and a motor connected to the reduction gear;a power transmission mechanism provided at an output side of the reduction gear for rotating one of the gun arms, wherein said power transmission mechanism comprises a swing arm fixed to an output shaft of the reduction gear and a link formed between the swing arm and one of the gun arms;wherein the swing arm and the link are connected to each other so that an output from a shaft of the motor and an electrode pressing force transmitted to one of the electrodes from a tip end of the swing arm by way of the link have a substantially linear proportional relation.