JP2583168Y2 - Pressure-compensated directional control valve device - Google Patents
Pressure-compensated directional control valve deviceInfo
- Publication number
- JP2583168Y2 JP2583168Y2 JP7409192U JP7409192U JP2583168Y2 JP 2583168 Y2 JP2583168 Y2 JP 2583168Y2 JP 7409192 U JP7409192 U JP 7409192U JP 7409192 U JP7409192 U JP 7409192U JP 2583168 Y2 JP2583168 Y2 JP 2583168Y2
- Authority
- JP
- Japan
- Prior art keywords
- port
- pressure
- spool
- valve
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【0001】[0001]
【産業上の利用分野】本考案は、1つの油圧ポンプの吐
出圧油を複数のアクチュエータに流量分配して供給する
圧油供給装置に用いる圧力補償式方向制御弁装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-compensated directional control valve device used for a pressure oil supply device for distributing and supplying the discharge pressure oil of one hydraulic pump to a plurality of actuators.
【0002】[0002]
【従来の技術】特開昭60−11706号公報に示す圧
油供給装置が知られている。すなわち、図1に示すよう
に油圧ポンプ1の吐出導管2に複数の圧力補償弁3,1
3を並列に接続し、各圧力補償弁3,13の出口導管
4,14に方向制御弁5,15をそれぞれ設けこの各方
向制御弁5,15の出力側をアクチュエータ6,16に
それぞれ接続し、前記圧力補償弁3,13をポンプ吐出
圧と方向制御弁出口圧で開き方向に押され、方向制御弁
入口圧と最も高い負荷圧で閉じ方向に押される構造とし
た圧油供給装置である。この圧油供給装置であれば、複
数の方向制御弁3,13を同時操作した時に各アクチュ
エータにポンプ吐出圧油を所定の分配比で流量分配して
供給できる。2. Description of the Related Art A pressure oil supply device disclosed in Japanese Patent Application Laid-Open No. Sho 60-11706 is known. That is, as shown in FIG. 1, a plurality of pressure compensating valves 3 and 1 are connected to the discharge conduit 2 of the hydraulic pump 1.
3 are connected in parallel, and directional control valves 5 and 15 are provided at outlet pipes 4 and 14 of the pressure compensating valves 3 and 13, respectively, and the output sides of the directional control valves 5 and 15 are connected to actuators 6 and 16, respectively. The pressure oil supply device has a structure in which the pressure compensating valves 3 and 13 are pushed in the opening direction by the pump discharge pressure and the direction control valve outlet pressure, and are pushed in the closing direction by the direction control valve inlet pressure and the highest load pressure. . With this pressure oil supply device, when the plurality of direction control valves 3 and 13 are simultaneously operated, the pump discharge pressure oil can be supplied to each actuator at a predetermined distribution ratio in a flow distribution manner.
【0003】かかる圧油供給装置であると方向制御弁
5,15と圧力補償弁3,13を用いるので、配管構造
や設置スペースの面で大変不利となる。In such a pressure oil supply device, the directional control valves 5 and 15 and the pressure compensating valves 3 and 13 are used, which is very disadvantageous in terms of piping structure and installation space.
【0004】そこで、本出願人は先に弁ブロックに方向
制御弁と圧力補償弁を組み込んだ圧力補償式方向制御弁
装置を提案した。すなわち、図2に示すように、弁ブロ
ック30は略直方体形状となり、この弁ブロック30の
上部寄りにスプール孔31が左右側面32,33に開口
して形成され、このスプール孔31に開口した第1・第
2アクチュエータポート34,35が上面36に開口し
て形成してあり、弁ブロック30の下部寄りには左側面
32に開口したチェック弁用孔37と右側面33に開口
した減圧弁用孔38が同心状に形成され、前記チェック
弁用孔37に開口したポンプポート39が前後面に開口
して形成され、前記減圧弁孔38に開口した第1、第2
ポート42,43が前後面に開口して形成してあり、複
数の弁ブロック30の前後面を突き合せて連結すると各
ポンプポート・第1・第2ポート39,42,43が連
通するようにしてある。Accordingly, the present applicant has previously proposed a pressure-compensated directional control valve device in which a directional control valve and a pressure compensating valve are incorporated in a valve block. That is, as shown in FIG. 2, the valve block 30 has a substantially rectangular parallelepiped shape, and spool holes 31 are formed near the upper portion of the valve block 30 by opening the left and right side surfaces 32 and 33. The first and second actuator ports 34 and 35 are formed in the upper surface 36 so as to be open. The lower portion of the valve block 30 is provided with a check valve hole 37 opened in the left side 32 and a pressure reducing valve opened in the right side 33. A hole 38 is formed concentrically, and a pump port 39 opened to the check valve hole 37 is opened to the front and rear surfaces, and the first and second pump holes 39 opened to the pressure reducing valve hole 38 are formed.
Ports 42 and 43 are formed so as to open to the front and rear surfaces. When the front and rear surfaces of the plurality of valve blocks 30 are connected to each other, the pump ports, the first and second ports 39, 42 and 43 are connected to each other. It is.
【0005】前記弁ブロック30にはスプール孔31に
開口した入力ポート44、第1・第2負荷圧検出ポート
45,46、前記第1・第2アクチュエータポート3
4,35、第1・第2タンクポート47,48が形成さ
れ、そのスプール孔31に嵌挿した主スプール49には
第1・第2小径部50,51と連通用溝52が形成して
あり、主スプール49には第1・第2負荷圧検出ポート
45,46を常時連通する第1油路53及び第2負荷圧
検出ポート46と第2タンクポート48を連通・遮断す
る第2油路54が形成され、スプール49はスプリング
で各ポートを遮断し、第2油路54で第2負荷圧検出ポ
ート46と第タンクポート48を連通する中立位置Aに
保持され、スプール49を右方に摺動すると第2小径部
51で第2アクチュエータポート35を第2タンクポー
ト48に連通し、連通用溝52で入力ポート44が第2
負荷圧検出ポート46に連通し、第1小径部50で第1
アクチュエータポート34が第1負荷圧検出ポート45
に連通し、かつ第2負荷圧検出ポート46と第2タンク
ポート48が遮断する第1圧油供給位置となり、スプー
ル49を左方に摺動すると第1小径部50で第1アクチ
ュエータポート34を第1タンクポート47に連通し、
連通用溝52で入力ポート44が第1負荷圧検出ポート
45に連通し、第2小径部51で第2アクチュエータポ
ート35が第2負荷圧検出ポート46に連通し、かつ第
2負荷圧検出ポート46と第2タンクポート48が遮断
する第2圧油供給位置となって方向制御弁55を構成し
ている。The valve block 30 has an input port 44 opened to the spool hole 31, first and second load pressure detecting ports 45 and 46, and the first and second actuator ports 3.
4 and 35, first and second tank ports 47 and 48 are formed, and first and second small diameter portions 50 and 51 and a communication groove 52 are formed in a main spool 49 inserted into the spool hole 31. The main spool 49 has a first oil passage 53 which always connects the first and second load pressure detection ports 45 and 46 and a second oil which connects and shuts off the second load pressure detection port 46 and the second tank port 48. A passage 54 is formed, the spool 49 blocks each port with a spring, and is held at a neutral position A where the second load pressure detection port 46 and the tank port 48 communicate with each other by the second oil passage 54, and the spool 49 is moved rightward. , The second actuator port 35 communicates with the second tank port 48 through the second small diameter portion 51, and the input port 44 communicates with the second port 52 through the communication groove 52.
The first small diameter portion 50 communicates with the load pressure detection port 46 and
The actuator port 34 is the first load pressure detection port 45
When the spool 49 slides leftward, the first actuator port 34 is connected to the first actuator port 34 by sliding the spool 49 to the left. Communicates with the first tank port 47,
The input port 44 communicates with the first load pressure detection port 45 through the communication groove 52, the second actuator port 35 communicates with the second load pressure detection port 46 through the second small diameter portion 51, and the second load pressure detection port The direction control valve 55 is configured as a second pressure oil supply position where the 46 and the second tank port 48 are shut off.
【0006】前記チェック弁用孔37は油路56で入力
ポート44に開口し、そのチェック弁用孔37には前記
ポンプポート39と入力ポート44を連通遮断する弁6
0が嵌挿され、その弁60はプラグ61に設けたストッ
パ杆62で図示位置より左方に摺動しないように規制さ
れて遮断位置に保持されてチェック弁部63を構成して
いる。The check valve hole 37 is opened to the input port 44 through the oil passage 56, and the check valve hole 37 is a valve 6 for shutting off the communication between the pump port 39 and the input port 44.
0 is inserted, and the valve 60 is regulated by a stopper rod 62 provided on a plug 61 so as not to slide leftward from the position shown in the figure, and is held at a shut-off position to constitute a check valve portion 63.
【0007】前記減圧弁用孔38は第3ポート57と油
路58で第2負荷圧検出ポート46に連通し、この減圧
弁用孔38にはスプール64が嵌挿されて第1圧力室6
5と第2圧力室66を形成し、第1圧力室65を第3ポ
ート57に連通し、第2圧力室66は第2ポート43に
連通し、前記スプール64の盲穴67に挿入したフリー
ピストン68と盲穴67底部との間にばね69が設けら
れてフリーピストン68はプラグ70に当接し、かつス
プール64に一体的に設けた押杆71が透孔72より突
出して前記弁60をストッパ杆62に当接しており、前
記スプール64には第1ポート42を盲穴67に連通す
る細孔73が形成されて減圧弁部74を構成し、この減
圧弁部74と前記チェック弁部63とで圧力補償弁75
を構成している。The pressure reducing valve hole 38 communicates with the second load pressure detecting port 46 via a third port 57 and an oil passage 58, and a spool 64 is inserted into the pressure reducing valve hole 38 so that the first pressure chamber 6
5 and a second pressure chamber 66, the first pressure chamber 65 communicates with the third port 57, the second pressure chamber 66 communicates with the second port 43, and is inserted into the blind hole 67 of the spool 64. A spring 69 is provided between the piston 68 and the bottom of the blind hole 67 so that the free piston 68 abuts on the plug 70, and a push rod 71 integrally provided on the spool 64 projects from the through hole 72 to operate the valve 60. The spool 64 has a small hole 73 formed in the spool 64 to communicate the first port 42 with the blind hole 67 to form a pressure reducing valve portion 74. The pressure reducing valve portion 74 and the check valve portion 63 and pressure compensating valve 75
Is composed.
【0008】この圧力補償式方向制御弁装置であれば、
油圧ポンプ76の吐出圧油をポンプポートと第1ポート
42に供給すると共に、第1・第2アクチュエータポー
ト34,35をアクチュエータ77の第1室77a、第
2室77bに接続し、主スプール49を左右に移動する
ことでアクチュエータ77の第1・第2室77a,77
bに油圧ポンプ76の吐出圧油をそのアクチュエータ7
7の負荷圧に応じて圧力補償して供給できる。In this pressure-compensating directional control valve device,
The discharge pressure oil of the hydraulic pump 76 is supplied to the pump port and the first port 42, and the first and second actuator ports 34 and 35 are connected to the first chamber 77 a and the second chamber 77 b of the actuator 77, and the main spool 49 is provided. Are moved left and right, so that the first and second chambers 77a and 77 of the actuator 77 are moved.
b to the actuator 7
7, the pressure can be compensated and supplied according to the load pressure.
【0009】[0009]
【考案が解決しようとする課題】主スプール49を第1
・第2圧油供給位置とした時に第1・第2アクチュエー
タポート34,35の圧力、つまりアクチュエータの負
荷圧が油路58で減圧弁部74の第1圧力室65に供給
され、スプール64が負荷圧によって右方に移動して第
1ポート42が第2圧力室66に連通してポンプ吐出圧
が高くなり、それによって第2圧力室66の圧力が第1
圧力室65と等しくなるとバネ67でスプール64が左
方に移動して第1ポート42と第1圧力室66がしゃ断
する。[Problem to be Solved by the Invention] The main spool 49 is moved to the first position.
When the second pressure oil supply position is set, the pressure of the first and second actuator ports 34 and 35, that is, the load pressure of the actuator is supplied to the first pressure chamber 65 of the pressure reducing valve portion 74 through the oil passage 58, and the spool 64 is moved. The pump port moves to the right by the load pressure and the first port 42 communicates with the second pressure chamber 66 to increase the pump discharge pressure, whereby the pressure in the second pressure chamber 66 becomes the first pressure.
When the pressure becomes equal to the pressure chamber 65, the spool 64 moves to the left by the spring 67, and the first port 42 and the first pressure chamber 66 are cut off.
【0010】このように、減圧弁部74によってポンプ
吐出圧が負荷圧によって決定されるので、パワーショベ
ルのアームダンプ作動、ブーム上作動、旋回動作等のよ
うに負荷圧が急激に高くなる時にはポンプ吐出圧が急激
に高くなって制振性が悪くなる。As described above, since the pump discharge pressure is determined by the load pressure by the pressure reducing valve section 74, when the load pressure suddenly increases, such as in the case of an arm dump operation, an operation on a boom, and a turning operation of a power shovel, the pump is operated. The discharge pressure rises sharply, and the damping performance deteriorates.
【0011】そこで、本考案は前述の課題を解決できる
ようにした圧力補償式方向制御弁装置を提供することを
目的とする。Accordingly, an object of the present invention is to provide a pressure-compensated directional control valve device which can solve the above-mentioned problems.
【0012】[0012]
【課題を解決するための手段】弁ブロック30にスプー
ル孔31とチェック弁用孔37と減圧弁用孔38を形成
し、前記弁ブロック30にはスプール孔31に開口した
入力ポート44、常時連通した第1・第2負荷圧検出ポ
ート45,46、第1・第2アクチュエータポート3
4,35、第1・第2タンクポート47,48をそれぞ
れ形成し、このスプール孔31に各ポートを連通・遮断
する主スプール49を嵌挿して方向制御弁55とし、前
記弁ブロック30にはチェック弁用孔37に開口したポ
ンプポート39及びチェック弁用孔37を入力ポート4
4に連通する油路56を形成し、そのチェック弁用孔3
7にポンプポート39と油路56を連通・遮断し、かつ
遮断位置でストップされるスプール60を挿入してチェ
ック弁部63とし、前記弁ブロック30には減圧弁用孔
38に開口する第1・第2ポート42,43を形成し、
この減圧弁用孔38にスプール64を嵌挿して第1圧力
室65と第2圧力室66を形成し、その第1圧力室65
を第2負荷圧検出ポート46に連通し、第2圧力室66
を第2ポート43に連通し、前記スプール64をばね6
9で一方向に付勢して前記チェック弁部63のスプール
60を遮断位置に押しつけ保持して減圧弁部74とし、
この減圧弁部74と前記チェック弁部63で圧力補償弁
75とし、前記弁ブロック30と主スプール49に、主
スプール49が中立位置から右・左に移動した時に減圧
弁部74の第2圧力室66をタンクポートに連通するポ
ート、溝を形成した圧力補償式方向制御弁装置。A spool hole 31, a check valve hole 37, and a pressure reducing hole 38 are formed in the valve block 30, and the valve block 30 has an input port 44 opened in the spool hole 31 and always communicates therewith. The first and second load pressure detection ports 45 and 46 and the first and second actuator ports 3
4 and 35, and first and second tank ports 47 and 48, respectively, and a main spool 49 for communicating and blocking each port is inserted into the spool hole 31 to form a directional control valve 55. The pump port 39 opened in the check valve hole 37 and the check valve hole 37 are connected to the input port 4.
4 is formed, and the check valve hole 3 is formed.
The pump port 39 communicates with and shuts off the oil passage 56, and a spool 60 that is stopped at the shut-off position is inserted into a check valve portion 63. Forming the second ports 42 and 43,
A first pressure chamber 65 and a second pressure chamber 66 are formed by inserting a spool 64 into the pressure reducing valve hole 38.
To the second load pressure detection port 46 and the second pressure chamber 66
To the second port 43 and connect the spool 64 with the spring 6
9, the urging force is applied in one direction to press and hold the spool 60 of the check valve portion 63 at the shut-off position to form the pressure reducing valve portion 74.
The pressure reducing valve portion 74 and the check valve portion 63 constitute a pressure compensating valve 75. The second pressure of the pressure reducing valve portion 74 when the main spool 49 moves right and left from the neutral position to the valve block 30 and the main spool 49. A pressure-compensated directional control valve device having a port and a groove for communicating the chamber 66 with the tank port.
【0013】[0013]
【作 用】弁ブロック30に方向制御弁55の主スプ
ール49と圧力補償弁75のチェック弁部63と減圧弁
部74を組み込んだからコンパクトな圧力補償式方向制
御弁装置となるし、主スプール47の移動によって減圧
弁部74の第2圧力室66とタンクポートが連通して第
2圧力室66内の圧油の一部がタンクに流出するからポ
ンプ吐出圧が急激に高くならずに制振性が向上する。[Operation] Since the main spool 49 of the directional control valve 55, the check valve portion 63 and the pressure reducing valve portion 74 of the pressure compensating valve 75 are incorporated in the valve block 30, a compact pressure-compensated directional control valve device is obtained. As a result, the second pressure chamber 66 of the pressure reducing valve section 74 communicates with the tank port, and a part of the pressure oil in the second pressure chamber 66 flows out to the tank. The performance is improved.
【0014】[0014]
【実 施 例】本考案の実施例を図3を参照して説明す
る。なお従来と同一部材は符号を同一とする。弁ブロッ
ク30のスプール孔31における第2タンクポート48
と隣接してポート80を形成し、このポート80を油孔
81で第2圧力室66に連通し、主スプール49に第2
タンクポート48とポート80を連通する第1・第2溝
82,83を周方向に間隔を置いて形成する。[Embodiment] An embodiment of the present invention will be described with reference to FIG. The same members as those in the related art have the same reference numerals. Second tank port 48 in spool hole 31 of valve block 30
A port 80 is formed adjacent to the main spool 49 and the port 80 communicates with the second pressure chamber 66 through an oil hole 81.
First and second grooves 82 and 83 communicating the tank port 48 and the port 80 are formed at intervals in the circumferential direction.
【0015】前記第1溝82は主スプール49が中立位
置から右方に移動した時に第2タンクポート48をポー
ト80に連通し、その連通面積はストロークに比例す
る。前記第2溝83は主スプール49が中立位置から左
方に移動した時にポート80を第2タンクポート48に
連通し、その連通面積はストロークに比例する。The first groove 82 connects the second tank port 48 to the port 80 when the main spool 49 moves rightward from the neutral position, and the communication area is proportional to the stroke. The second groove 83 communicates the port 80 with the second tank port 48 when the main spool 49 moves leftward from the neutral position, and the communication area is proportional to the stroke.
【0016】このようであるから、主スプール49を中
立位置から右方に移動した時に第2タンクポート48と
ポート80が第1溝82で連通して第2圧力室66が第
2タンクポート48に連通するので、第2圧力室66内
の圧油の一部がタンクに流出してポンプ吐出圧が急激に
高くならないから、制振性が向上する。As described above, when the main spool 49 is moved rightward from the neutral position, the second tank port 48 and the port 80 communicate with each other through the first groove 82, and the second pressure chamber 66 is connected to the second tank port 48. , A portion of the pressure oil in the second pressure chamber 66 does not flow out to the tank and the pump discharge pressure does not suddenly increase, so that the vibration damping property is improved.
【0017】[0017]
【考案の効果】弁ブロック30に方向制御弁55の主ス
プール49と圧力補償弁75のチェック弁部63と減圧
弁部74を組み込んだからコンパクトな圧力補償式方向
制御弁装置となるし、主スプール49の移動によって減
圧弁部74の第2圧力室66とタンクポートが連通して
第2圧力室66内の圧油の一部がタンクに流出するから
ポンプ吐出圧が急激に高くならずに制振性が向上する。Since the main spool 49 of the directional control valve 55, the check valve portion 63 of the pressure compensating valve 75, and the pressure reducing valve portion 74 are incorporated in the valve block 30, a compact pressure-compensated directional control valve device is obtained. Due to the movement of 49, the second pressure chamber 66 of the pressure reducing valve portion 74 communicates with the tank port and a part of the pressure oil in the second pressure chamber 66 flows out to the tank. Vibration is improved.
【図1】従来の圧油供給装置の回路図である。FIG. 1 is a circuit diagram of a conventional pressure oil supply device.
【図2】先に出願した圧力補償式方向制御弁装置の断面
図である。FIG. 2 is a cross-sectional view of the previously applied pressure-compensated directional control valve device.
【図3】本考案の実施例を示す圧力補償式方向制御弁装
置の断面図である。FIG. 3 is a sectional view of the pressure-compensated directional control valve device according to the embodiment of the present invention.
30…弁ブロック、31…スプール孔、34…第1アク
チュエータポート、35…第2アクチュエータポート、
37…チェック弁用孔、38…減圧弁用孔、39…ポン
プポート、42…第1ポート、43…第2ポート、44
…入力ポート、45…第1負荷圧検出ポート、46…第
2負荷圧検出ポート、47…第1タンクポート、48…
第2タンクポート、49…主スプール、53…第1油
路、56…油孔、58…油孔、60…弁、63…チェッ
ク弁部、64…スプール、65…第1圧力室、66…第
2圧力室、69…ばね、74…減圧弁部、75…圧力補
償弁、80…ポート、81…油孔、82…第1溝、83
…第2溝。30 ... valve block, 31 ... spool hole, 34 ... first actuator port, 35 ... second actuator port,
37 ... check valve hole, 38 ... pressure reducing valve hole, 39 ... pump port, 42 ... first port, 43 ... second port, 44
... input port, 45 ... first load pressure detection port, 46 ... second load pressure detection port, 47 ... first tank port, 48 ...
Second tank port, 49 Main spool, 53 First oil passage, 56 Oil hole, 58 Oil hole, 60 Valve, 63 Check valve, 64 Spool, 65 First pressure chamber, 66 Second pressure chamber, 69 Spring, 74 Pressure reducing valve part, 75 Pressure compensation valve, 80 Port, 81 Oil hole, 82 First groove, 83
... Second groove.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平4−194468(JP,A) 特開 平2−248704(JP,A) 特開 平4−244605(JP,A) (58)調査した分野(Int.Cl.6,DB名) F15B 11/00 F15B 11/05────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-194468 (JP, A) JP-A-2-248704 (JP, A) JP-A-4-244605 (JP, A) (58) Field (Int.Cl. 6 , DB name) F15B 11/00 F15B 11/05
Claims (2)
ック弁用孔37と減圧弁用孔38を形成し、前記弁ブロ
ック30にはスプール孔31に開口した入力ポート4
4、常時連通した第1・第2負荷圧検出ポート45,4
6、第1・第2アクチュエータポート34,35、第1
・第2タンクポート47,48をそれぞれ形成し、この
スプール孔31に各ポートを連通・遮断する主スプール
49を嵌挿して方向制御弁55とし、 前記弁ブロック30にはチェック弁用孔37に開口した
ポンプポート39及びチェック弁用孔37を入力ポート
44に連通する油路56を形成し、そのチェック弁用孔
37にポンプポート39と油路56を連通・遮断し、か
つ遮断位置でストップされるスプール60を挿入してチ
ェック弁部63とし、 前記弁ブロック30には減圧弁用孔38に開口する第1
・第2ポート42,43を形成し、この減圧弁用孔38
にスプール64を嵌挿して第1圧力室65と第2圧力室
66を形成し、その第1圧力室65を第2負荷圧検出ポ
ート46に連通し、第2圧力室66を第2ポート43に
連通し、前記スプール64をばね69で一方向に付勢し
て前記チェック弁部63のスプール60を遮断位置に押
しつけ保持して減圧弁部74とし、この減圧弁部74と
前記チェック弁部63で圧力補償弁75とし、 前記弁ブロック30と主スプール49に、主スプール4
9が中立位置から右・左に移動した時に減圧弁部74の
第2圧力室66をタンクポート連通するポート、溝を形
成したことを特徴とする圧力補償式方向制御弁装置。1. A valve block 30 has a spool hole 31, a check valve hole 37, and a pressure reducing valve hole 38, and the valve block 30 has an input port 4 opened to the spool hole 31.
4. First and second load pressure detection ports 45, 4 which are always in communication
6, the first and second actuator ports 34, 35, the first
The second tank ports 47 and 48 are formed respectively, and a main spool 49 for communicating and blocking each port is inserted into the spool hole 31 to form a directional control valve 55. The check valve hole 37 is formed in the valve block 30. An oil passage 56 is formed to communicate the opened pump port 39 and the check valve hole 37 to the input port 44, and the pump port 39 and the oil passage 56 are communicated / blocked to the check valve hole 37 and stopped at the cutoff position. A check valve portion 63 is inserted by inserting the spool 60 into the valve block 30.
The second ports 42 and 43 are formed, and the pressure reducing valve holes 38 are formed.
A first pressure chamber 65 and a second pressure chamber 66 are formed by inserting a spool 64 into the first pressure chamber 65, the first pressure chamber 65 is communicated with the second load pressure detection port 46, and the second pressure chamber 66 is connected to the second port 43. , The spool 64 is urged in one direction by a spring 69 to press and hold the spool 60 of the check valve portion 63 at the shut-off position to form a pressure reducing valve portion 74. The pressure reducing valve portion 74 and the check valve portion At 63, a pressure compensating valve 75 is provided. The main spool 4 is connected to the valve block 30 and the main spool 49.
A pressure-compensating directional control valve device, wherein a port and a groove are formed to communicate the second pressure chamber 66 of the pressure reducing valve section 74 with the tank port when the valve 9 moves right and left from the neutral position.
48の隣接位置にポート80を形成し、このポート80
を油孔81で第2圧力室66に連通し、前記主スプール
49にポート80と第2タンクポート48を連通・遮断
する第1溝82、第2溝83を形成した請求項1記載の
圧力補償式方向制御弁装置。2. A port 80 is formed in the valve block 30 at a position adjacent to the second tank port 48.
2. The pressure according to claim 1, wherein a first groove (82) and a second groove (83) are formed in the main spool (49) to communicate with and block the port (80) and the second tank port (48). Compensation type directional control valve device.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7409192U JP2583168Y2 (en) | 1992-10-23 | 1992-10-23 | Pressure-compensated directional control valve device |
DE69328382T DE69328382T2 (en) | 1992-10-23 | 1993-10-22 | PRESSURE OIL SUPPLY SYSTEM WITH PRESSURE COMPENSATING VALVE |
US08/411,817 US5651390A (en) | 1992-10-23 | 1993-10-22 | Pressurized fluid supply system |
KR1019950701574A KR950704617A (en) | 1992-10-23 | 1993-10-22 | Pressurized fluid supply system |
PCT/JP1993/001534 WO1994010454A1 (en) | 1992-10-23 | 1993-10-22 | Pressure oil supply system having a pressure compensating valve |
EP93923052A EP0747601B1 (en) | 1992-10-23 | 1993-10-22 | Pressure oil supply system having a pressure compensating valve |
US08/600,505 US5784885A (en) | 1992-10-23 | 1996-02-13 | Pressurized fluid supply system |
US08/742,777 US5845678A (en) | 1992-10-23 | 1996-10-31 | Pressurized fluid supply system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7409192U JP2583168Y2 (en) | 1992-10-23 | 1992-10-23 | Pressure-compensated directional control valve device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0637605U JPH0637605U (en) | 1994-05-20 |
JP2583168Y2 true JP2583168Y2 (en) | 1998-10-15 |
Family
ID=13537169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7409192U Expired - Lifetime JP2583168Y2 (en) | 1992-10-23 | 1992-10-23 | Pressure-compensated directional control valve device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2583168Y2 (en) |
-
1992
- 1992-10-23 JP JP7409192U patent/JP2583168Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0637605U (en) | 1994-05-20 |
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