OPERATION MACHINE OF CONSTRUCTION MACHINERY

PROBLEM TO BE SOLVED: To form a boom and an arm out of a base metal as an unwelded member and to provide a construction of an operation machine capable of arranging hydraulic pipes through the insides of the arm and boom. SOLUTION: A boom 3 and an arm 4 of an operation machine 1 are formed of a pair...

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1. Verfasser: SHIMOGAICHI HIROSHI
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To form a boom and an arm out of a base metal as an unwelded member and to provide a construction of an operation machine capable of arranging hydraulic pipes through the insides of the arm and boom. SOLUTION: A boom 3 and an arm 4 of an operation machine 1 are formed of a pair of right and left side panels, a plurality of pin holes passing pins therethough in joint sections 13, 21 and 23 are bored into a pair of side panels, and the pins are pivoted to the pin holes. A spacer boss 6 is inserted in a void section between the insides corresponding to the side panels in the pin joint sections, and hydraulic pipes 11 and 12 connecting to an arm cylinder 9 and a bucket cylinder 10 from the body of a construction machinery are arranged to the insides of a pair of side panels.