Patent ID: 6244175
Filing Date: 2001-06-12
Classification: B41F,F16H,Y10T

Abstract:
A single space rotary printing press for newspapers comprising a plurality of printing units vertically arranged at different elevations, said printing units each comprising a plate cylinder having an annular gear at one end, a first transmission gear box and at least one second transmission gear box respectively coupled to said printing units and driven to rotate said printing units, wherein:said first transmission gear box comprises an enclosed shell, a power input shaft transversely mounted in the shell of said first transmission gear box, a driven helical gear and a driving bevel gear fixedly mounted on the power input shaft of said first transmission gear box, a power output shaft vertically mounted in the shell of said first transmission gear box, a driven bevel gear fixedly mounted on one end of the power output shaft of said first transmission gear box and meshed with the driving bevel gear of said first transmission gear box, a transmission shaft transversely mounted in the shell of said first transmission gear box, a driving helical gear fixedly mounted on the transmission shaft of said first transmission gear box and meshed with he driven helical gear of said first transmission gear box, and a transmission bevel gear fixedly mounted on the transmission shaft of said first transmission gear box meshed with the annular gear at the plate cylinder of the printing unit at the lowest elevation;said at least one second transmission gear box each comprises an enclosed shell, a bracket fixedly provided inside the shell of the corresponding second transmission gear box, a power output shaft transversely mounted on said bracket, a driven bevel gear and a driving helical gear respectively and fixedly mounted on the power output shaft of the corresponding second transmission gear box and spaced from said bracket at two opposite sides, a vertically extended power input shaft, a driving bevel gear fixedly mounted on the power input shaft of the corresponding second transmission gear box and meshed with the driven bevel gear of the corresponding second transmission gear box, a transmission shaft arranged in parallel to the power output shaft of the corresponding second transmission gear box, a driven helical gear fixedly mounted on the transmission shaft of the corresponding second transmission gear box, a transmission bevel gear fixedly mounted on the transmission shaft of the corresponding second transmission gear box and meshed with the annular gear at the plate cylinder of one printing unit, and an adjustment mechanism installed in the shell of the corresponding second transmission gear box, said adjustment mechanism comprised of a locating axle, a gear barrel mounted on said locating axle and moved axially along said locating axle, and a worm and gear assembly, said gear barrel comprising a first transmission helical gear and a second transmission helical gear reversely disposed at two opposite ends thereof, said first transmission helical gear meshed with the driving helical gear on the power output shaft of the corresponding second transmission gear box, said second transmission helical gear meshed between the driving bevel gear at the power input shaft of the corresponding second transmission gear box and the driven helical gear at the transmission shaft of the corresponding second transmission gear box, said locating axle having a threaded end disposed outside the shell of the corresponding second transmission gear box, said worm and gear assembly comprising a worm gear threaded onto the threaded end of said locating axle, a worm supported in two supporting boards outside the shell of the corresponding second transmission gear box and meshed with said worm gear, and a servomotor mounted on one of said support boards and coupled to one end of said worm; andcoupling means respectively coupled between the power output shaft of said first transmission gear box and the power input shaft of said at least one second transmission gear box for enabling said first transmission gear box and said at least one second transmission gear boxes to be synchronously rotated.