FIELD: machine building.
SUBSTANCE: invention relates to hydraulic (pneumatic) cylinders. Hydro (pneumatic) cylinder comprises cylinder body (12) including sliding hole (12a), partition (26) dividing sliding hole into working cylinder chamber (14a) and supercharging cylinder chamber (16a), working piston (20) dividing the working cylinder chamber into first and second pressure chambers (38, 40). Supercharging piston (22) divides the supercharging cylinder chamber into the third and the fourth pressure chambers (42, 44). Piston rod (18) is connected to working piston (20) and supercharging piston (22). High-pressure fluid is sealed relative to chambers (38, 40, 42, 44). Cylinder additionally comprises mechanism (33) for switching supercharging depending on the location of working piston (20).
EFFECT: reduced power consumption.
16 cl, 16 dwg
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