Steering mechanism for forklift trucks

Details Steering mechanism for forklift trucks Steering mechanism for forklift trucks

B - Operations, Transporting

62

D

B62D 5/06 (2006.01) B62D 9/00 (2006.01) B66F 9/06 (2006.01)

Patent

CA 2440864

A forklift truck steerable along at least two opposite directions of travel by a hydraulic circuit includes at least one hydraulic cylinder (22) coupled to at least one steerable ground-engaging wheel (18) and a driver's steering wheel (20) for controlling the supply of hydraulic fluid under pressure selectively to the full bore or piston rod side of the cylinder. The hydraulic circuit also includes a diverter valve (32) which is switched over when the truck is driven in one of the two directions to cause the truck to steer in the same direction as the steering wheel is turned in whichever of the opposite directions the truck is travelling.

L'invention concerne un chariot à fourche qu'on peut guider au moins dans deux directions opposées de trajet, à l'aide d'un circuit hydraulique. Ce chariot comprend au moins un cylindre hydraulique (22) couplé à au moins une roue orientable qui rentre en contact avec le sol (18) et une roue directrice de conducteur (20), de manière à réguler l'alimentation du passage intégral ou du côté de la tige du piston du cylindre, en fluide hydraulique sous pression. Ce circuit hydraulique comporte aussi une vanne de dérivation (32) commutée, lorsqu'on conduit le chariot dans une des deux directions pour le guider dans la même direction à mesure que la roue directrice tourne dans une des directions opposées du trajet du chariot.

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