DRIVING CIRCUIT FOR VEHICLE IN RIGHT/LEFT INDEPENDENT HYDRAULIC TRAVELING MOTOR DRIVE SYSTEM

摘要

PURPOSE:To soften the shock on start and stop by installing each bypass circuit into which a small diameter orifice is inserted at the both edge parts between each circuit for advance and retreat of the right and left motors for a direct drive type vehicle using a hydraulic traveling motor. CONSTITUTION:Each adapter 18 is installed at the both edge parts of each bypass circuit 24, 25, and a nozzle 19 is installed into the adapter 18 and used as a small diameter orifice 16. If, in a driving circuit, one between the right and left control levers 14 and 15 operates earlier then the other, a hydraulic pressure generated in a traveling circuit which operates earlier acts also into the bypass circuit 24 or 25, and the right and left traveling motors 4 and 5 drive nearly simultaneously, and the lateral vibration in the traveling direction is eliminated. Further, the sharp variation of the hydraulic pressure in the driving circuit is reduced hy generating the pressure storing effect in the bypass circuit, and the shock on start and stop is softened.