Steering system for plurality of vehicles

B - Operations – Transporting – 62 – D

Patent

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Details

B62D 13/04 (2006.01) B62D 53/00 (2006.01)

Patent

CA 2107843

A steering system is capable of steering a plurality of conveyor vehicles connected together in the form of a train. The vehicle has a first pair of wheels which can be steered by an operator as the train moves. There are further pairs of steerable wheels connected to the second and subsequent vehicles in the train and supporting same. There are hydraulic cylinders for steering each of the pairs of steerable wheels on the second and subsequent vehicles and a control mechanism for controlling these cylinders in order to set the steering angle of each further pair. This control mechanism includes means for determining the current steering angle of the first pair of wheels and generating an electrical signal indicative thereof and means for storing a series of these electrical signals as the train is travelling. Further means determine the amount of time the wheels in the train have been travelling and there is a calculator for determining the location of each of the further pairs of wheels on the basis of the determined travel time. A second electrical signal is generated for each further pairs of wheels in order to control its respective hydraulic cylinder and thereby set the steering angle of each pair at the same steering angle that the first pair of wheels had when they were at that location.

Système de direction capable d'orienter les roues d'une pluralité de véhicules de manutention reliés entre eux pour former un train. Le véhicule comporte une première paire de roues qui peuvent être orientées par un opérateur pendant que le train est en marche. D'autres paires de roues directrices reliées aux autres véhicules du train de manutention sont aussi commandées par le système de direction. Des vérins hydrauliques assurent l'orientation des paires de roues directrices montées sous les autres véhicule par l'intermédiaire d'un mécanisme de commande de direction. Le mécanisme de commande en question comporte un dispositif servant à déterminer l'angle de braquage de la première paire de roues directrices et capable de produire un signal électrique correspondant à cet angle de braquage et de stocker un certain nombre de tels signaux électriques à mesure que le train se déplace. Un autre dispositif servant à mesurer les temps de déplacement des roues est relié à un calculateur capable de déterminer l'emplacement exact de chacune des paires de roues sur la base des temps de déplacement. Un autre signal électrique est produit pour actionner les vérins hydrauliques commandant chacune des autres paires de roues afin d'en régler l'angle de braquage pour reproduire l'angle de braquage de la première paire de roues à un même emplacement donné.

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