Abstract: The invention provides a working machine of a hydraulic backhoe in which the blade tip force 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 pivotally connected to third fulcrums (6, 13) provided in common at a leading end of an arm cylinder (4) and one end of a first link (10) and to a second fulcrum (12) of an arm (2) is a hydraulic correction cylinder (11). 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).

Abstract: A blade device, wherein the angling angle of a blade can be increased and the blade width at the maximum angling is smaller than the chassis width without setting the mount position of the blade too far from a chassis. The connecting position of a joint for connecting a frame and a blade deviates from the crosswise center X--X of a chassis; and an actuator for pivotally moving the blade forward or backward is attached to the frame. As such, good workability of the blade device and good transportability of an earth-moving machine to which the blade device is operably coupled can be obtained.