Patent ID: 9096107
Filing Date: 2015-08-04
Classification: B60F,E02F

Abstract:
1. A regulating device for a working machine including at least four rubber wheels, of which at least two are drivable, for driving of the working machine on roads and in terrain, and a railway wheel unit in the area of each of a forward and rearward end, respectively, of the working machine, each railway wheel unit including at least two railway wheels of which at least one is raiseable and lowerable via at least one hydraulic cylinder to allow raising of the railway wheel unit, a pivot arm pivotally fixed at one end to a chassis of the working machine and attached to a shaft between the at least two railway wheels at another end, and by this to allow driving of the working machine on roads and in terrain by way of the rubber wheels and to allow lowering of the railway wheel unit for bearing of the railway wheels against rails of a railway track during simultaneous bearing of the rubber wheels against the rails for driving of the working machine on the railway track by guiding along the rails by way of the railway wheels and driving and braking against the rails by way of the rubber wheels, the regulating device comprising: a position regulator, configured to automatically control the hydraulic cylinder, in a driving position, to maintain the railway wheels on a predetermined perpendicular distance from a reference point on a chassis of the working machine in a direction in relation to the working machine which represents a vertical direction when the working machine is positioned on a horizontal ground, such that it is ensured that the working machine, during driving along the railway track, is guided from and to some extent is carried by the railway wheels, while a remaining weight is carried by the rubber wheels such that the rubber wheels bear against the rails with sufficient force and allow driving and braking, respectively, of the working machine against the rails; a regulating computer, configured to control the hydraulic cylinder in the driving position; and a position sensor operatively connected to the regulating computer, wherein the position sensor is an angle sensor which detects a rotational angle of the pivot arm.