| 摘要 |
PURPOSE:To efficiently reduce air resistance by attaching air flow streamlining plate so that it can be rotated, and adjusted to suit for trailers of various height. CONSTITUTION:When the pressurized oil is supplied to the air pipe suction side by operation of change over valve, the rod of the actuator 13 is pulled into the cylinder, and the movable cross member 24 slides to the forward direction through rollers 28 and 29 so as to go along he rail 16 and 17. Thus when the member 24 is made to slide forward, the upper part of the air streamlining plate 11 is pushed up by the movable arms 18 and 19, and the air streamlining plate 11 is rotated forward around the cross member 14. Consequently, when the height of trailer connected to the rear side of the tractor 40 is high, the installation angle of streamlining plate 11 is increased by shifting the change over valve, and when the trailer is low, the change over valve is operated to the opposite side and the installation angle of the streamlining plate 11 is decreased. |
