| 摘要 |
A block-and-tackle system of turning a boom of manipulator contains a base in the form of a triangular frame, to which a load-gripping boom is fastened, which is set in motion by hydraulic power cylinders, a hydraulic system for control of the cylinders, a pulley fastened eccentrically on the load-gripping boom, and a mechanism of tension of the rope of any known design. From below of triangular frame beams are located, which bear bearing shoes. The axis of pulley is coaxial with the axes of two hinges coaxial in the vertical plane, through which the load-gripping boom is fastened to the base. The pulley goes around through the guide rolls a rope, which is cinematically connected with a stock of the vertically installed hydraulic cylinder. |
