A lift truck has a pair of driven wheels 108, 110 at one end, each with an independently controllable electrical motor, and at least one steerable wheel 104, 106 at the other end. A sensor, preferably a linear sensor, measures a signal indicating the distance between a fixed point (CP, Figure 13) on the lift truck chassis and a moveable point (RP, Figure 13) associated with the steering gear of steerable wheel 104, 106, whose output is provided to a controller to derive a lateral distance to a common centre 102 of turning circles associated with wheels of the truck. The controller calculates a required drive speed for the electric motor of each driven wheel 108, 110 according to the distance of that wheel from the calculated common centre of turning circles, and outputs a respective independent motor control signal effective to cause the drive motors to drive the driven wheels at the calculated speeds,
Differential steering arrangement for electrically driven lift trucks
13.07.2022
Patent
Elektronische Ressource
Englisch
DIFFERENTIAL STEERING ARRANGEMENT FOR ELECTRICALLY DRIVEN LIFT TRUCKS
Europäisches Patentamt | 2023
|Differential steering arrangement for electrically driven lift trucks
Europäisches Patentamt | 2023
|