JPS581669U - Hydraulic circuit for excavator rotation and boom swing - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の旋回とブームスイングの油圧回路図、第
２図は本考案の旋回とブームスイングの油圧回路図であ
る。 ５は圧油供給管、１０は旋回モータ、１１はブームシリ
ンダ、１２は切換弁、１３はカウンタバランス弁、１９
−は逆止弁、２１は補充回路を示す。FIG. 1 is a hydraulic circuit diagram of the conventional swing and boom swing, and FIG. 2 is a hydraulic circuit diagram of the swing and boom swing of the present invention. 5 is a pressure oil supply pipe, 10 is a swing motor, 11 is a boom cylinder, 12 is a switching valve, 13 is a counterbalance valve, 19
- indicates a check valve, and 21 indicates a replenishment circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 圧油供給管に設けた操作弁にカウンタバランス弁、切換
弁を順次直列に接続し、該切換弁に旋回モータ及びブー
ムシリンダを並列に接続し、逆止弁を備えた補充回路に
より旋回モータ及びブームシリンダに油を補充し得る様
構成したことを特徴とする掘削機の旋回とブームスイン
グの油圧回路。A counterbalance valve and a switching valve are connected in series to an operating valve provided in a pressure oil supply pipe, a swing motor and a boom cylinder are connected in parallel to the switching valve, and a supplementary circuit equipped with a check valve controls the swing motor and the switching valve. A hydraulic circuit for swinging and swinging an excavator, characterized in that it is configured to allow oil to be replenished into a boom cylinder.