FIELD: mechanical engineering; engines. SUBSTANCE: rod sliding support is replaced by movable rolling support of toothed rack. Introduction of support on movable member - toothed rack excludes parallelogram ties from load circuit turning the ties into auxiliary members. Reduction of stresses in these units materially decreases their weight and consequently parasitic mass of rod which also increases efficiency. To provide operation of movable support use is made of mechanism 5 providing control and locking of support in operating positions in form of hydraulic cylinder in movable support, check valves operated by stops on rod and rack catch on rod. EFFECT: increased efficiency, reduced mass. 2 cl, 1 dwg
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