FIELD: metallurgy.
SUBSTANCE: device contains lead-screw installed with ability of axial movement, interlocked with displacement mechanism in the form of jaw with drive from worm gearing, case of which is installed with ability of displacement lengthwise lead screw axis, and hydraulic ram. It is outfitted by hydraulic pump assembly and connected with it following valve, interacting with jaw and hydraulically linked with hydraulic ram, providing power movement of worm gearing case, rigidly connected with lead screw.
EFFECT: increasing of durability and wear resistance.
2 dwg
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