Hydraulic shovel
a shovel and hydraulic technology, applied in the field of hydraulic shovels, can solve the problems of deterioration of the front attachment weight balance, damage to control valves, pipes, etc., and achieve the effect of improving the operational stability of the front attachment and improving the weight balance of the front attachmen
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[0012]An embodiment of this invention will be described below with reference to the drawings.
[0013]As shown in FIG. 1, in a hydraulic shovel (construction machine) 1 according to an embodiment of this invention, a vehicle body (revolving body) 2 is provided revolvably on an upper portion of a traveling body 6.
[0014]The hydraulic shovel 1 includes a boom 3 connected rotatably to the vehicle body 2 via a boom support shaft 7, two boom hydraulic cylinders 10 for driving the boom 3, an arm 4 connected rotatably to a tip end of the boom 3 via an arm support shaft 38, an arm hydraulic cylinder 9 for driving the arm 4, a bucket 5 connected rotatably to a tip end of the arm 4 via a bucket support shaft 51, and a bucket hydraulic cylinder 8 for driving the bucket 5.
[0015]An oil pressure supply unit 21 is installed in the vehicle body 2. The hydraulic cylinders 8-10 are caused to expand and contract by working oil introduced from the oil pressure supply unit 21. By causing the hydraulic cylin...
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