FIELD: transport.
SUBSTANCE: hydraulic device (1) comprises cylinder (2) and piston (3) reciprocating therein. Piston comprises rod (4) and disc (5) to divide said cylinder in lengthwise direction into first chamber (6) and second chamber (7). Rod id displaced by controlled hydraulic fluid feed into chambers so that piston rod extends from the cylinder when said fluid is fed via first inlet (8) into first chamber via first line (9) and pulls therein when said fluid is fed via second inlet (10) into second chamber (7) via second line (11). Hydraulic device is equipped with pressure instantaneous drop means in the case of external force effects of magnitude exceeding a definite threshold which makes piston rod (4) move relative to cylinder (2). Hydraulic device is used to incline the cabin coupled with vehicle chassis. Cabin can displace backward relative to chassis at collision by its front.
EFFECT: better shock energy absorption at collision.
5 cl, 5 dwg
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