PLANET GEAR Russian patent published in 2007 - IPC F16H1/34 F16H25/22 

FIELD: mechanical engineering.

SUBSTANCE: planet gear comprises long threaded rollers whose traveling (4) and bearing (3) sections are provided with different numbers of thread entries. The rollers engage the screw with the corresponding number of thread entries in its traveling (2) and bearing (1) sections . The bearing of the gear is made of bearing nut (5) mounted at one of the ends of the gear or is made of two bearing nut members mounted at both ends of the gear. Grooves (10) are interposed between traveling (2) and bearing (1) thread sections. The width of the grooves exceeds that of the traveling nut members, and the depth of the grooves is lower than that of the thread hollows. The ends of the screw, long rollers, and bearing nuts may be provided with gearing rims or additional thread whose rising angle exceeds that of the thread in the traveling and bearing sections. The angles of rising and forms of the thread of the bearing sections of the screw, roller, and bearing nuts may be made so that to prevent gear wedging.

EFFECT: prolonged service life.

4 dwg