Snow-removing car

TLDR: In this article, a simple speed detector was used to detect engine speed of front and rear wheels and control oil pressure supplied to a grader blade controlling cylinder based on a revolving speed difference calculated with a controller.

Abstract: PURPOSE:To reduce a cost by detecting engine speed of front and rear wheels with a simple speed detector, and controlling oil pressure supplied to a grader blade controlling cylinder based on a revolving speed difference calculated with a controller. CONSTITUTION:In the case snow is to be removed with a grader blade 30, a differential lock mechanism 88 of a distribution machine 54 is in an unlocking state, and differential of output of the front and rear wheels is in an allowable state. After that, speed signals of a front wheel speed detector 154 and a rear wheel speed detector 156 provided respectively to front and rear wheels are supplied to a second controller 48. Then, the controller 48 detects slip ratio in comparison with speed signals of the detectors 154 and 156. A signal of the slip ratio is supplied to a hydraulic adjusting device 34, and hydraulic pressure oil supplied to a hydrulic cylinder device 114 is controlled to lift a blade 30. The blade 30 is pushed against the snow surface so as to obtain an optimum slip ratio. According to the constitution, unexpensive dectors can be used, as reliability and maintenance efficiency can be promoted.