PACKAGED TELESCOPIC MAST WITH CHAIN HOIST Russian patent published in 2021 - IPC B66F1/06 B66F3/00 E04H12/18 

FIELD: lifting devices.

SUBSTANCE: invention relates to lifting devices and can be used in mobile and stationary installations for various purposes. The telescopic mast contains a fixed first section and movable sections, which include locks and stops designed to grip and fix the movable sections, as well as a gear motor. The mechanism for extending the sections of the telescopic mast is made on the basis of a chain, the profile of the links of which is made with a locking pin at one end, which prevents the chain from folding in one direction after its straightening, which ensures the transfer of force in two directions. One end of the chain is attached to the lower flange of the upper pull-out section, its other end is laid in the chain store, fixed to the first section by means of a bracket, windows for the passage of the chain are made in the lower flanges of the movable sections. The lock is designed as a mechanism with two working positions. At the end of the chain there is a damper device, which is a pack of Belleville springs.

EFFECT: providing improved reliability, speed of deployment and load capacity.

2 cl, 13 dwg