| 摘要 |
PURPOSE:To prevent the interfering action between an oil-pressure cylinder mechanism for angling and an oil-pressure cylinder mechanism for tilting by using a system in which the oil-pressure cylinder mechanism for angling is interposed between a supporter and a blade and one end of a support rod provided with the oil-pressure cylinder mechanism for tilting is moved back and forth in relation to vehicle. CONSTITUTION:In the case of tilting, a slider 34 is fixed to a pin 38, an oil- pressure cylinder mechanism 26 for tilting is shrunk or expanded, and a blade 6 is turned around an axis 10. Since a supporter 4 and the blade 6 turn together, no unfavorable action acts on an oil-pressure cylinder mechanism 28 for angling. In the case of angling, the slider 34 is freely moved, the oil-pressure cylinder mechanism 28 for angling is shrunk or expanded, and the blade 6 is turned around an axis 22. Since the balde 6 and the support rod 24 move together with the oil-pressure cylinder mechanism 26 for tilting, no unfavorble action acts on the cylinder mechanism 26. |
