Patent ID: 6681433
Filing Date: 2004-01-27
Classification: E01H

Abstract:
A sweeping unit for mounting on a carrier vehicle or a trailer, comprising:a carrying frame and at least one motor-driven rotary brush mounted in said carrying frame such that the rotary brush can be-rotated about a longitudinal axis thereof, the carrying frame having supporting wheels; an adjusting unit for adjusting a vertical distance of the supporting wheels from the axis of the rotary brush, the adjusting unit including: at least one hydraulic adjusting cylinder for moving the supporting wheels relative to the axis of the rotary brush to set the vertical distance therebetween; a supply cylinder having a piston and a hydraulic operating chamber communicating with the at least one adjusting cylinder and having a smaller cross-sectional surface area than the at least one adjusting cylinder; and a control device for controlling drive of the supply cylinder based upon detected movement of the piston of the supply cylinder to set the vertical distance of the supporting wheels from the axis of the rotary brush.