| 摘要 |
<p>The present invention includes a box boom loader mechanism (10) utilizing a box boom lift arm assembly (84) with a single plate steel top wall (96) and a bottom wall (120) connected with a non-transverse weld to a pair of single plate steel inner side walls (88, 92) to define a rectangular cross section therealong. The connection of the top and bottom walls (96, 120) and the inner side walls defines a bifurcated second end portion (176) straddling a central portion (38) of a frame (26) and being connected therewith. A tilt linkage means (318) is connected to the box boom lift arm assembly (84) and includes a tilt lever (322), tilt link (326) and tilt cylinder (410). The connection of the components of the tilt linkage means (318) achieves high visibility and optimal linkage performance. The connection of the bifurcated second end portion (176) to the frame (26) and the non-transverse weld improves strength and fatigue characteristics of the box boom loader mechanism without increasing the weight of the machine.</p> |
