INERTIAL NUT DRIVER Russian patent published in 2014 - IPC B25B21/00 

FIELD: machine building.

SUBSTANCE: nut driver comprises encased drive 1 its shaft supporting gear 2, clutch 3, planetary reduction gearbox 5 with unbalanced pinions 6 fitted on its carrier 7 and spindle 9 with tool 10 fitted thereat. It incorporates gearing, wheel 4 of the latter being articulated with gear 2 fitted on output shaft of drive 1. Aforesaid gear is articulated with pinions 6 of planetary reduction gearbox 5. Intermittent motion mechanism 8 engaged with, on one side, with carrier 7 of planetary reduction gearbox 5 and, on opposite side, with spindle 9 via two other gears. Besides, it incorporates the system for control over tightening with respect to turn angle of threaded part 14 and modulation disc 13. Modulation disc 13 is fitted on output shaft of said mechanism 8 to get in contact with said control system 14. Clutch 3 is fitted on output shaft of drive 1 downstream of gear 2 to get in contact with tightening control system 14. Output shaft of said system 14 carries the wheel of second gearing and gear of third gearing.

EFFECT: higher precision and efficiency of assembly.

2 dwg