JPS59135954U - Hydraulic circuit of upper swing vehicle - 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) [Summary] 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 drawings]

図面は本考案の実施例を示す線図的構成説明図である。 Ａは下部走行体、Ｂは上部車体、１は走行モータ、２は
アウトリガジヤツキ、３は操作弁、４は配管、５はセン
タスイベル、６はパイロット圧作動式切換弁、８はパイ
ロット路、Ｐはポンプ、ＰＬはパイロットポンプ。The drawings are diagrammatic configuration explanatory diagrams showing an embodiment of the present invention. A is the lower traveling body, B is the upper vehicle body, 1 is the travel motor, 2 is the outrigger jack, 3 is the operating valve, 4 is the piping, 5 is the center swivel, 6 is the pilot pressure operated switching valve, 8 is the pilot path, P is pump, PL is pilot pump.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 下部走行Ａに走行モータ１とアウトリガシャツ、　キ２
とを設け、上部車体ＢにはポンプＰの圧油を配管に供給
制御する操作弁３を設けると共に、該配管をセンタスイ
ベル５を介して下部走行体Ａに設けたパイロット圧作動
式切換弁６により走行モータ１とアウトリガジヤツキ２
のどちらか一方に接続し、該パイロット圧作動式切換弁
６のパイロット路８をセンタスイベル５を介して上部車
体Ｂに設けたパイロットポンプＰ１に接続制御したこと
を特徴とする上部旋回車両の油圧回路。Travel motor 1 and outrigger shirt on lower travel A, Ki 2
The upper body B is provided with an operation valve 3 for controlling the supply of pressure oil from the pump P to a pipe, and the pipe is connected to the lower vehicle A via a center swivel 5. A pilot pressure-operated switching valve 6 is provided on the lower vehicle A. Accordingly, the traveling motor 1 and the outrigger jack 2
The hydraulic pressure of an upper swing vehicle is characterized in that the pilot path 8 of the pilot pressure-operated switching valve 6 is connected and controlled via the center swivel 5 to a pilot pump P1 provided on the upper vehicle body B. circuit.