ROTARY DEVICE Russian patent published in 2020 - IPC B66C3/00 

FIELD: machine building.

SUBSTANCE: invention relates to rotary device (10) to provide rotary motion between crane boom and hydraulic tool. Rotary device comprises first fastening part (15) made with possibility of attachment to crane boom, second fastening part (16), made with possibility of attachment to hinged implement, housing (20) connecting first fastening part (15) with second fastening part (16). Housing (20) is configured to withstand loads of hydraulic tool and comprises bearing (18), allowing first part of body to rotate relative to second part of housing, and hydraulic rotation motor (11) configured to provide rotational motion between first and second fastening parts (15, 16) around axis of rotation (A), wherein motor comprises stator (13) and rotor (12). Rotor (12) is located inside the stator with possibility of rotation relative to stator (13) around the same axis of rotation (A), as the first and second fastening parts. Hydraulic connections (31) for supply of hydraulic tool with hydraulic fluid are located opposite first fastening part (15) and substantially parallel to axis of rotation (A) by means of or through rotor (12) of engine (11), wherein rotor (12) is located inside said housing (20).

EFFECT: providing rotary motion without excessive stress between stator and rotor.

12 cl, 7 dwg