| 摘要 |
FIELD: mechanical engineering; load hoisting. SUBSTANCE: hoisting device has slewing column with first boom section 2 and second boom section 3 connected in tandem, turning drive 5 of boom section 3, levers 10, 11 coupled by hinge joints 6, 7, 8, 9 with boom sections 2, 3. Axes of rotation of hinge joints 6,7,8,9 connecting levers 10, 11 with first boom section 2 and second boom section 3 lie on two parallel straight lines in initial position. Axes of rotation of hinge joints formed by each lever 10, 11 are located on straight lines 12, 13, and turning drive 5 is directly coupled with boom sections 2, 3 connected by levers 10, 11. EFFECT: increased efficiency and service life of hoisting device. 2 cl, 7 dwg |
