JPS63119907U - - Google Patents

Description

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

第１図はこの考案の一実施例を示すマルチポー
ト分流・集流回路図、第２図は同じくそのスプー
ル弁のみを拡大して示す断面図、第３図は同じく
そのパイロツト圧力切換弁のみを拡大して示す断
面図、第４図は従来の分流・集流弁を例示する断
面図、第５図は従来の分流・集流弁を２段構成に
して示した分流・集流回路図である。 １０Ａ〜１０Ｄ……スプール弁、１１ｃ……環
状の溝、１３Ａ〜１３Ｄ……固定オリフイス、１
４Ａ〜１４Ｄ……スプール、１７Ａ_１〜１７Ａ_４
……分流制御用可変オリフイス、１７Ｂ_１〜１７
Ｂ_４……集流制御用可変オリフイス、１９……パ
イロツト圧力切換弁、２０……高圧選択シヤトル
弁群、２１Ａ〜２１Ｃ……シヤトル弁、３０……
低圧選択シヤトル弁群、３１Ａ〜３１Ｃ……シヤ
トル弁、Ａ，Ｂ_１〜Ｂ_４……流入・流出ポート、
Ｃ_１〜Ｃ_４，Ｄ_１〜Ｄ_４，Ｈ，Ｉ……スプール端
室。 Fig. 1 is a multi-port flow dividing/collecting circuit diagram showing an embodiment of this invention, Fig. 2 is an enlarged sectional view of only the spool valve, and Fig. 3 is a diagram showing only the pilot pressure switching valve. Figure 4 is an enlarged cross-sectional view showing an example of a conventional flow dividing/collecting valve, and Figure 5 is a dividing/collecting circuit diagram showing a conventional dividing/collecting valve in a two-stage configuration. be. 10A to 10D... Spool valve, 11c... Annular groove, 13A to 13D... Fixed orifice, 1
4A to 14D...Spool, 17A ₁ to 17A ₄
... Variable orifice for flow control, 17B ₁ ~ 17
B ₄ ... Variable orifice for flow control, 19... Pilot pressure switching valve, 20... High pressure selection shuttle valve group, 21A to 21C... Shuttle valve, 30...
Low pressure selection shuttle valve group, 31A to 31C...Shuttle valve, A, _B1 to _B4 ...Inflow/outflow port,
_C1 to _C4 , _D1 to _D4 , H, I... Spool end chamber.

Claims (1)

【実用新案登録請求の範囲】 供給作動流体を１個の流入・流出ポートより負
荷圧力に係わりなく複数の流入・流出ポートに比
例分流し、かつ逆方向の流れに対し比例集流する
往復同調用のマルチポート分流・集流回路であつ
て、 前記複数の流入・流出ポートと同数の固定オリ
フイスをそれぞれ前記１個の流入・流出ポートに
連通させて設け、該各固定オリフイスと前記複数
の流入・流出ポートとの間にそれぞれ分流制御用
可変オリフイスと集流制御用可変オリフイスを形
成するスプール弁を前記各固定オリフイスに対応
させて並列に配置すると共に、 該各スプール弁と各固定オリフイスとの間に、
該各固定オリフイスのスプール弁側圧力中の最高
圧力を選択する高圧選択シヤトル弁群及び最低圧
力を選択する低圧選択シヤトル弁群と、前記固定
オリフイスの前後差圧によつて作動して分流時に
は前記最高圧力を、集流時には前記最低圧力をパ
イロツト圧力として出力するようにパイロツト流
路を切換えるパイロツト圧力切換弁とを設け、 前記各スプール弁のスプールの一端に前記各固
定オリフイスのスプール弁側圧力をそれぞれ作用
させ、他端に前記パイロツト圧力を共通に作用さ
せて、 分流時には、前記最高圧力によつて前記各スプ
ール弁のスプールを分流制御用可変オリフイスを
絞る方向に移動させて供給作動流体に圧力降下を
生じさせ、 集流時には、前記最低圧力によつて前記各スプ
ール弁のスプールを集流制御用可変オリフイスを
絞る方向に移動させて供給作動流体に圧力降下を
生じさせるようにしたことを特徴とするマルチポ
ート分流・集流回路。[Claims for Utility Model Registration] For reciprocating tuning in which the supplied working fluid is proportionally divided from one inflow/outflow port to multiple inflow/outflow ports regardless of the load pressure, and the flow is proportionally concentrated in the opposite direction. A multi-port flow dividing/collecting circuit, wherein fixed orifices of the same number as the plurality of inflow/outflow ports are respectively provided in communication with the one inflow/outflow port, and each fixed orifice is connected to the plurality of inflow/outflow ports. Spool valves forming a variable orifice for dividing flow control and a variable orifice for concentrating flow control, respectively, are arranged in parallel with the outflow port in correspondence with each of the fixed orifices, and between each of the spool valves and each of the fixed orifices. To,
A high-pressure selection shuttle valve group selects the highest pressure among the spool valve side pressures of each fixed orifice, a low-pressure selection shuttle valve group selects the lowest pressure, and a group of high-pressure selection shuttle valves selects the lowest pressure among the spool valve side pressures of each fixed orifice. A pilot pressure switching valve is provided to switch the pilot flow path so as to output the maximum pressure as the pilot pressure and the minimum pressure as the pilot pressure when the flow is concentrated, and the spool valve side pressure of each of the fixed orifices is connected to one end of the spool of each of the spool valves. The pilot pressure is commonly applied to the other end, and when the flow is divided, the maximum pressure is used to move the spool of each spool valve in the direction of narrowing the variable orifice for flow control, thereby applying pressure to the supplied working fluid. and at the time of flow collection, the spool of each of the spool valves is moved in a direction to throttle the flow collection control variable orifice by the minimum pressure, thereby causing a pressure drop in the supplied working fluid. Multi-port shunt/collector circuit.