| 摘要 |
PURPOSE:To miniaturize a slewing type excavator by a method in which a swivel joint-fitting bracket is set and fixed to a swivel joint-setting base projected from the middle of a traveling frame to the inside of a slewing bearing base, and a protective cover is fixed to the lower part of the bracket. CONSTITUTION:A slewing frame F is set through a slewing bearing B on a crawler type traveler C and a boom device A is provided in a bilaterally and vertically turning manner on the front end, and a bucket is set on the tip. An engine E is provided on the frame F in such a way as to enable it to turn through 360 deg. on the bearing B. Swivel joints are set on swivel joint bases 4 and 5 projected from traveling frames 7 and 8, a fitting bracket 3 on the lower end of a fixing cylinder 1 is fixed to the upside of the bases 4 and 5, and a rectangular protective cover 6 is fixed to the downside. The lowest level on the ground's surface can thus be set high, and the slewing frames.
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