Patent ID: 6494116
Filing Date: 2002-12-17
Classification: B30B,Y10T

Abstract:
A stroke adjusting device for a press machine, comprising:a connecting rod having a large end and a stroke distance; an eccentric bushing slidably and rotatably inside said large end; an eccentric shaft having a first side and a second side; an eccentric part formed on said first side; said eccentric part adjustably provided inside said eccentric bushing; said eccentric shaft receiving an eccentric vibration during operation of said connecting rod; a rotation balancing eccentric bushing formed on said second side; a rotation balancing weight adjustably joined to said rotation balancing eccentric bushing; said rotation balancing weight formed to minimize said vibration; means for fixing said rotation balancing weight; first means for adjusting said eccentric bushing relative to said eccentric part whereby said stroke distance is adjusted; and second means for adjusting said rotation balancing weight relative to said rotation balancing eccentric bushing whereby said vibration is minimized; and wherein said means for fixing comprises: a fixing rod fixed to an external member; a groove in said rotation balancing weight; and said fixing rod rotatably engaging said groove during adjustment of said stroke adjusting device whereby the rotation balancing weight is prevented from rotating relative to said external member.