| 摘要 |
This invention concerns an improvement of the central drive linkage for the cutting and creasing machine which comprises at least a plurality of differential gears 1 mounted on the upper part, and a plurality of fine-tuning mechanism 2 evenly distributed on the lower part; in which the main drive shaft 10 and the counter weight 12 of the differential gears 1 are arranged in the eccentric manner so as to generate relatively angular differentials as the central drive linkage rotates. The counter weight 12 has a connecting rod 13 linking to a crankshaft 14 which has an upper end connected to the workbench 3 and a lower end to the fine-tuning mechanism 2 in order to obtain comparatively stable working torque output and precise performance and to attain the intermittent change of slow lifting and fast lowering of the workbench movement. Four sets of fine-tuning mechanisms 2 are evenly disposed under and support the overall weight of the differential gears 1. The top surface of the fine-tuning mechanism 2 forms an arch cavity 22 with two-fan type fixing lips 23 to hold the crank web in place and fastened by adjusting bolts 231 to secure the proper left or right displacement of the crankshaft 14. Such an arrangement will ensure the intimate contact between the crank web 14 and cavity 22, gain adequate working elevation for crankshaft 14 through the adjustment of the fine-tuning mechanism 2 and maintain the workbench 3 in straight level during the operation without slight slant. This will achieve the greatest stability. |
