| 摘要 |
A skid-steer crane attachment is connected to the attachment plate at the front of skid-steer lift arms by a mounting plate and upper and lower mounting brackets. A central boom support is welded to the plate, and a rectangular outer tube is welded to the upper end of the boom support. Angle supports are welded between the outer tube and upper corners of the mounting plate to make the outer tube rigid. A rectangular cross-sectional boom slides within the outer tube and is held in raised, lowered and intermediate positions with a lock pin aligned holes in the boom and outer tube. Booms are extended and lowered with small hand winches and with hydraulics from the supply on the skid-steer. A winch is mounted on the outer tube. A cable extends from a winding reel on the winch, over a sheave and down to a hook which hangs in front of the boom. In one embodiment, the boom support is mounted at an angle to the mounting plate and the outer tube is positioned at the same angle on the upper end of the boom support. In another embodiment, the boom support and mounting plate are vertically mounted on angled lateral supports, and the outer tube is vertically mounted. A forward cantilevered extension at the top of the boom carries a second sheave, over which the cable passes. An L-shaped foot at the bottom of the mounting plate supports swivel casters for supporting the boom on a hard surface when the mounting plate is lowered. A boom cushion on the foot cushions the lower end of the boom.
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