HOOK SUSPENSION Russian patent published in 2019 - IPC E21B19/04 B66C1/34 

FIELD: transportation.

SUBSTANCE: invention relates to hoisting devices equipped with hook suspension. Hook suspension comprises interconnected cylindrical hollow housing with blind top cover, ledge installed in lower part of housing, spring, thrust nut connected with hook shaft, hold-down sleeve and thrust bearing. Ledge is removable in the form of a coupling nut with internal annular groove for arrangement of the bearing. Groove depth is more than height of bearing, and inner diameter of housing is smaller than outer diameter of bearing. On outer surface of thrust nut and inner surface of removable ledge there are cavities, into which balls are installed, located along circles in 90°.

EFFECT: technical result consists in improvement of durability and reliability of hook suspension operation.

1 cl, 3 dwg