Lifting performance of a work machine is increased while suppressing an increase in a vehicle weight. When a slewing frame (1) is seen from a side, a first reinforcement member (11) is provided from a boom foot section (5) to a front side part of a slewing bearing (22), a second reinforcement member (12) is provided from the boom foot section (5) to a mast foot section (6), and a third reinforcement member (13) is provided from the mast foot section (6) to a rear side part of the slewing bearing (22). Furthermore, a fourth reinforcement member (14) is provided from a middle region (M) located at an upper end portion of the slewing frame (1) and above a rear portion of the slewing bearing (22) to the front side part of the slewing bearing (22), and a fifth reinforcement member (15) is provided from the middle region (M) to the rear side part of the slewing bearing (22).
REVOLVING FRAME FOR WORK MACHINE, AND WORK MACHINE PROVIDED WITH SAME
2020-01-30
Patent
Electronic Resource
English
REVOLVING FRAME FOR WORK MACHINE, AND WORK MACHINE PROVIDED WITH SAME
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