Hydrostatic travelling mechanism

B - Operations – Transporting – 60 – K

Patent

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Details

B60K 17/356 (2006.01) F16H 39/02 (2006.01) F16H 61/46 (2006.01)

Patent

CA 2371444

The invention relates to a hydrostatic travelling mechanism (4) that comprises a closed hydraulic circuit (6) in which a first hydraulic pump (4) with a first hydraulic engine (12) is linked with a flow pipe (7) and a return pipe (8). Said hydraulic engine (12) drives the vehicle wheels (14, 15, 18, 19) of two first vehicle axles (17, 20). According to the invention, an additional open hydraulic circuit (9) is used in which a second hydraulic engine (22) and third hydraulic engine (24) are linked with a second hydraulic pump (5) via a supply pipe (11) and a control valve (21). Said second hydraulic engine (22) and said third hydraulic engine (24) drive the vehicle wheels (23, 25) of a second vehicle axle (36).

La présente invention concerne un système d'entraînement hydrostatique (4). Ce système comprend un circuit hydraulique fermé (6) dans lequel une première pompe hydraulique (4) est reliée à un premier moteur hydraulique (12) par une canalisation montante (7) et une canalisation descendante (8). Ledit moteur hydraulique (12) entraîne les roues de véhicule (14, 15, 18, 19) de deux premiers axes de véhicule (17, 20). Selon cette invention, un circuit hydraulique ouvert (9) est également prévu. Dans ce circuit hydraulique ouvert, un deuxième moteur hydraulique (22) et un troisième moteur hydraulique (24) sont reliés à une seconde pompe hydraulique (5) par une conduite d'arrivée (11) et une soupape de distribution (21). Ledit deuxième moteur hydraulique (22) et ledit troisième moteur hydraulique (24) entraînent les roues de véhicule (23, 25) d'un second axe de véhicule (36).

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