| 摘要 |
A working machine (10) includes a main frame structure (11) and an upper frame structure (51), the upper frame structure (51) being slewable relative to the main frame structure (11) about a substantially upright axis (A), the main frame structure (11) including a main frame part (40) provided by a central portion (50) and four connecting arms (60 - 63) which extend outwardly of the central portion (50) towards track sub-frames (15, 16) at the sides of the machine (10), and wherein the central portion (50) of the main frame part (40) is provided as a casting, and the four connecting arms (60 - 63) are provided by the ends of fabricated elements (65, 66) which are attached to the central portion (50). |
