Patent ID: 6749550
Filing Date: 2004-06-15
Classification: B26D,B26F,B30B,Y10T

Abstract:
A central drive linkage for a cutting and creasing machine, wherein said central drive linkage mainly comprises a differential gear installed on an upper part and a fine-tuning mechanism mounted on a lower part, characterized in that:said differential gear consists of one main drive shaft installed in a center of said central drive linkage and a worm gear meshed closely with a main drive shaft, said worm gear has a counter weigh at one end and a propeller fan at the other end, disposed eccentrically with said main drive shaft, said counter weight has several connecting rods, each of said connecting rods links to a crankshaft and separated by a disk, said crankshaft has an upper end connected to a workbench and a lower end to a fine-tuning mechanism, when said main drive shaft brings said worm gear and said counter weight into rotary movement, said main drive shaft would produce relatively angular differentials, said crankshaft is also brought into action by said connecting rod to create a slow lifting and fast lowering movement on said workbench; there are four sets of said fine-tuning mechanisms evenly distributed on a bottom of said central drive linkage, said fine-tuning mechanism has a slide block at a bottom, two identical slide blocks are linked on one slide rod for adequately adjusting displacement and force dispersion, a top of said fine-tuning mechanism forms an arch cavity with two fixing lips on both side to house a crank web and receive several adjusting bolts to lock said crank web within said cavity and fixing lips, so said fine-tuning mechanism can make close contract with and effectively control positions of said crankshaft and keep said workbench always on a level without slight slant.