MECHANISED TOOL Russian patent published in 2011 - IPC B25D16/00 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building. Proposed device comprises tool head, head drive and drive torque limiter to transmit torque to head. Said limiter comprises first revolving element, second revolving element to turn about first revolving element, ball support retained by first revolving element, clamping element to move first revolving element axially toward ball element, and flexible element. Second revolving element comprises power transfer section with recess and power transfer interruption section with recess. With ball support in power transfer section, clamping element stays in contact with first revolving element to prevent displacing flexible element onto ball support. With ball support moving from power transfer section to power transfer interruption section, clamping element is pushed by ball support out axially to apply displacing force of flexible element to ball support.

EFFECT: longer life of torque limiter.

9 cl, 9 dwg