| 摘要 |
<p>A working machine of a hydraulic backhoe in which the blade tip force of a bucket can be increased over a wide range of operations, which has a great blade tip force at the start of excavation, and which can increase working efficiency by avoiding obstacles. For these purposes, a second link connected to third fulcrums (6, 13) provided at a leading end of an arm cylinder (4) and one end of a first link (10) so as to be used commonly by the two members and to a second fulcrum (12) of an arm (2) is a hydraulic correction cylinder (11). In addition, a working hydraulic circuit for the arm cylinder (4) and the correction cylinder (11) may constitute a series circuit having a circuit (24) connecting a head side oil chamber (20) of the arm cylinder (4) to a bottom side oil chamber (23) of the correction cylinder (11).</p> |
