HYDRAULIC SYSTEM OF FOLDING BRIDGE BLOCK Russian patent published in 2023 - IPC E01D15/127 

FIELD: bridge crossing technology.

SUBSTANCE: invention relates to the hydraulic systems of bridge blocks of a bridge laying machine. The hydraulic system of the folding bridge block includes hydraulic cylinders with axes for connecting and disconnecting the end and middle sections of the bridge block, connected by hydraulic lines to their control drives. The drive of these hydraulic cylinders in each track is carried out by a pair of one-way hydraulic cylinders with a spring return rod, placed on transverse beams located in the internal part on both sides of the middle sections, and driven by hydraulic cylinders located on the bridge-laying machine and operating from its hydraulic system. Each one-way hydraulic cylinder with a spring return rod, one of which is connected by hydraulic lines to the piston and the other to the rod cavities of all four hydraulic cylinders with axes, is made with a piston cavity volume exceeding the total volume of the piston and, accordingly, the total volume of the rod cavities of these four hydraulic cylinders located in each track of the bridge block.

EFFECT: simplifying the design of the hydraulic system of the folding bridge block and reducing its weight, thereby providing the opportunity to increase the length of the bridge block.

1 cl, 3 dwg