TOOTHED WHEEL GEARING (VARIANTS) AND A PLANETARY TOOTHED MECHANISM BASED THEREON (VARIANTS)

摘要

The inventive wheel gearing with curved teeth is used for designing small-sized mechanical transmissions for transmitting rotational motion at a high transmission ratio in one stage. The small gear wheel (16) has one tooth, the end cross-section of which is shaped in the form of a circle (3) which is eccentrically shifted with respect to the axis 001 of the wheel (16). The curved tooth of the wheel (16) (screwed eccentric) is formed by successively displacing the circle (3) along the axis 001 and by continuously rotating it about the axis. The big wheel (17) has screwed teeth which are formed by pivoting a cycloidal curve (5) and are conjugated with the helicoidal surface of the gear (16). The gearing has a continuous contact line along the entire tooth length, wherein an annular rundle and a cycloid having minimum friction losses are engaged. In order to remove axial loads generated i the meshing of screwed teeth, the wheels (16, 17) are provided with herringbone teeth. A similar eccentric cycloidal gearing can be designed in the form of compound wheels. Cylindrical reducing gear trains with parallel shafts, conical reducing gear trains with crossing shafts and planetary transmissions designed according to David's and James' diagrams, exhibiting high loading characteristics and having smaller sizes can be based on said gearing.