Patent ID: 6432022
Filing Date: 2002-08-13
Classification: F16H,Y10S,Y10T

Abstract:
A planetary gear mechanism for installation in printing, packaging, and paper and textile manufacturing machines, that can run continuously without maintenance for at least 10,000 hours at drive speeds of at least 3,000 rpm without any liquid lubricant, comprising:a gear casing connected to an input shaft and an output shaft; a drive pinion extending into the gear casing; an internal gear fixed to the casing and surrounding the drive pinion; an oil-permeable sealing ring sealing the gear casing from each of the input shaft and output shaft; a plurality of planetary gears which mesh simultaneously with the drive pinion and the internal gear, wherein at least one of said drive pinion, said internal gear and said planetary gears is coated on a running surface thereof with a coating having a lower coefficient of friction and a higher wear resistance than a base material of the drive pinion, the planetary gears and the internal gear, such that said drive pinion, said planetary gears and said internal gear do not require lubricating oil; and a plurality of roller bearings disposed within the gear casing and supporting the drive shaft and output shaft, said roller bearings being independently lubricated for life.