Cylindrical gear wheel for external tooth engagement

摘要

The gear is intended for use in toothed reduction gear systems in machine tool transmissions and other machinery. It is characterized by the fact that assembly slots (13, 30) are provided in apertures in partitions in the housing (1, 20) below the radial rooler bearing with two flanges on the outer ring (8, 16, 29) of the intermediate shaft-pinions (6, 15, 24). Thanks to this arrangement, subassemblies put together outside the housing can be mounted in the one-piece housings (1, 20, 35); those subassemblies comprise the intermediate shaft-pinions (6,15, 24), the toothed wheels (5, 7, 25) and the inner rings of the roller bearings (8, 16, 29) in the following construction: multi-stage, single-flow gears; gears with stages divided between two symmetrically configured pairs of spiral gear wheels whose teeth are inclined at opposing angles; multi-flow gears in which the assembly slots (30) are formed by machining a cylindrical surface (31) in the one-piece housing (in the two-stage gears the said surface is machined on the outer partition (20) of the housing, in the four-stage gears on the intermediate partition (36) of the housing). The four-stage multi-flow gears consist of two two-stage gears connected by a shaft-pinion (37) running without any radial support through the intermediate partition (36) of the one-piece housing (35).