CRANE TRUCK Russian patent published in 2018 - IPC B66C23/00 

FIELD: machine building.

SUBSTANCE: invention relates to self-propelled cranes. Crane truck contains the boom housing for telescopic sections with guide frames at their end with stops fixed at the bottom, inside which spring-loaded latches are installed for connecting the sections to each other, on the sides there are protrusions for gripping the sections during their raising-lowering and for fixing the sections on the boom. Drive for lifting sections is mounted on a movable carriage located in the upper part of the boom body, and is made in the form of two hydraulic cylinders connected by bridges, the rods of which are connected by a plate equipped with mechanisms for gripping the stops, and equipped with a controller of the extreme positions of the piston by means of a stepper actuator in the form of a hydraulic cylinder, the casing of which is fixed on the carriage, and the means for fixing the stepping movement is made in the form of a linear specimen with tags attached to the carriage and a device for reading labels attached to the boom housing. To control the process of telescoping sections, the crane is equipped with a control unit.

EFFECT: simplified manufacturing and operation, reducing the length of the truck crane by increasing the number of sections.

1 cl, 5 dwg