Motion control system for a materials handling vehicle

B - Operations – Transporting – 66 – F

Patent

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Details

B66F 9/24 (2006.01) B60L 3/02 (2006.01) B62B 3/06 (2006.01) B62D 51/00 (2006.01) B62B 5/06 (2006.01) H01H 9/06 (2006.01)

Patent

CA 2210037

The present invention is directed to an improved motion control system for a motorized hand/rider lift truck having a load bearing fork, electric traction motor, storage battery, steerable wheel, steering control mechanism, and a brake that includes a deadman brake mechanism. An electrical power circuit comprises a high speed control circuit and a low speed control circuit that control, respectively, a high speed travel mode and a low speed travel mode of the truck. The improved motion control system of the invention further comprises means for selecting the high or low speed travel mode and means for actuating an automatic coast control device that automatically overrides the deadman brake mechanism while the truck is in the low speed travel mode and deactivates the coast control device when the truck is in the high speed travel mode. The present invention is further directed to a coast control device for a hand/rider truck having a brake that includes a deadman brake mechanism, an electrical power circuit that includes high and low speed control circuits, and a steering mechanism that includes a steering arm movable to a position that causes engagement of the brake. The high and low speed circuits control, respectively, high speed and low speed travel modes of the truck.

Cette invention concerne un système amélioré de contrôle des mouvements pour chariot élévateur motorisé à conducteur embarqué ou accompagnant, qui comporte une fourche de levage, un moteur de traction électrique, un accumulateur, des roues orientables, un mécanisme de direction et un frein à dispositif d'homme mort. Un circuit d'alimentation électrique comprend un circuit de commande haute vitesse et un circuit de commande basse vitesse qui règlent, respectivement, la marche haute vitesse et la marche basse vitesse du chariot. Le système amélioré de contrôle des mouvements objet de l'invention comprend en outre un sélecteur de vitesse de marche et un moyen d'enclenchement automatique de la marche au débrayé qui neutralise automatiquement le dispositif d'homme mort en marche basse vitesse et qui se désenclenche lorsque le chariot se déplace à grande vitesse. La présente invention concerne de plus un dispositif de commande de marche au débrayé pour chariot à conducteur embarqué ou accompagnant, qui est équipé d'un frein à dispositif d'homme mort, d'un circuit d'alimentation électrique à deux positions, basse vitesse et haute vitesse, et un mécanisme de direction qui comprend un bras de direction mobile vers une position qui force le serrage des freins. Les circuits haute vitesse et basse vitesse commandent, respectivement, la marche basse vitesse et haute vitesse du chariot.

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