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公开(公告)号：EP1052440A4
公开(公告)日：2005-08-31
申请号：EP99973109
申请日：1999-11-30
CPC分类号： F15B11/165 , F15B2211/20546 , F15B2211/20576 , F15B2211/30525 , F15B2211/329 , F15B2211/6355 , F15B2211/67 , F16K11/07 , F16K27/041 , Y10T137/87193 , Y10T137/87201
摘要： A control valve capable of suppressing the number of external pipes connected to a hydraulic remote control valve, wherein the control valve (1), which is operated by the hydraulic remote control valve (24) so as to control hydraulic cylinders (2) and (2'), is provided with; in one spool cover (26), oil paths (27, 27') communicating with hydraulic ports (25, 25') as the connection ports for pilot lines (24a, 24c), a shuttle valve (28) which selects a pressure on the high pressure side from among the pilot pressures led into these oil paths (27, 27'), and an oil path (29) which leads a pressure selected by the shuttle valve (28); and, in the other spool cover (32), oil paths (33, 33') communicating with hydraulic ports (31, 31') as the connection ports for pilot lines (24b, 24d), a shuttle valve (34) which selects a pressure on the high pressure side from among the pilot pressures led into these oil paths (33, 33'), and an oil path (35) which leads a pressure selected by the shuttle valve (34).
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公开(公告)号：EP0864761A4
公开(公告)日：2000-09-27
申请号：EP97933905
申请日：1997-08-05
IPC分类号： E02F9/22 , F15B11/02 , F15B11/028 , F15B13/01 , F15B11/08
CPC分类号： E02F9/2267 , E02F9/226 , E02F9/2271 , F15B11/02 , F15B11/028 , F15B13/015 , F15B2211/20538 , F15B2211/30505 , F15B2211/30515 , F15B2211/30525 , F15B2211/3116 , F15B2211/329 , F15B2211/40515 , F15B2211/41527 , F15B2211/428 , F15B2211/46 , F15B2211/50518 , F15B2211/5151 , F15B2211/528 , F15B2211/55 , F15B2211/6355 , F15B2211/7053
摘要： A hydraulic control apparatus is provided with a valve device (B), which controls a pressure oil supplied to a hydraulic cylinder (C) from a hydraulic pump (A). The valve device comprises a spool (16) slidably fitted into a valve body (1) and a non-leak valve (27) for controlling communication of an actuator passage (19). The non-leak valve comprises a main valve unit (40) having a seat valve (41) provided in the valve body, and a pilot control unit (60) having a pilot poppet valve (61) provided on an end cover (31). The seat valve is controlled in proportion to an opening of the pilot poppet valve and houses therein a relief valve (55) for preventing overload on the hydraulic cylinder. Accordingly, the non-leak valve achieves a load holding function and an overload relief function, and is arranged in two rows together with a spool of the non-leak valve, whereby the valve device can be made compact.
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公开(公告)号：EP1076183A4
公开(公告)日：2006-03-15
申请号：EP00906673
申请日：2000-03-03
CPC分类号： F15B11/163 , E02F9/2221 , E02F9/2225 , F15B11/0406 , F15B13/0417 , F15B2211/20538 , F15B2211/20553 , F15B2211/30505 , F15B2211/30525 , F15B2211/30535 , F15B2211/40515 , F15B2211/41509 , F15B2211/41527 , F15B2211/455 , F15B2211/46 , F15B2211/50518 , F15B2211/50554 , F15B2211/5151 , F15B2211/57 , F15B2211/6051 , F15B2211/6052 , F15B2211/6054 , F15B2211/6055 , F15B2211/7052 , F15B2211/7058 , F15B2211/71 , F15B2211/76
摘要： A load pressure detection oil passage (7-1) branches from an oil passage (30-1) between the outlet passageway (5b) of a flow dividing valve (5-1) and a hold check valve (6-1) and is connected to a signal detection oil passage (9), the latter being connected to a tank (T) via a restrictor (14) (with an area at), while a control oil passage (10-1) branches from the load pressure detection oil passage (7-1) and is connected to a control chamber (70), with a check valve (8-1) placed in an oil passage portion (7a) between the oil passage (30-1) of the load pressure detection oil passage (7-1) and the branch point at which the control oil passage (10-1) branches, with a restrictor (11) (with an area ac) placed in an oil passage portion (7b) between a branch point at which the control oil passage (10-1) of the load pressure detection oil passage (7-1) branches and the signal detection oil passage (9). Thereby, in the hydraulic circuit device having a load sensing system, smooth starting characteristics are obtained irrespective of the size of an inertial body to be driven, and the arrangement is simple and can be readily applied even in the case of a spool type control valve.
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公开(公告)号：EP1054163A4
公开(公告)日：2005-06-15
申请号：EP99973103
申请日：1999-12-01
CPC分类号： E02F9/2267 , E02F9/2271 , F15B13/021 , F15B13/0418 , F15B2013/006 , Y10T137/86702
摘要： A directional control valve device, wherein a regenerating check valve (26) and a piston valve (27) are disposed coaxially inside a spool (2) slidably in the axial direction of the spool, an axial oil path (32) is formed inside the cylindrical part (27a) of the piston valve (27), the seat part (33) of the regenerating check valve is formed at the open side end part of the cylindrical part (27a), a hole (36) to lead the pressure oil in the oil path (32) into a bridge path (21) when the spool (2) is operated so that it leads the pressure oil from a hydraulic pump to the bottom side of a hydraulic cylinder is formed in the cylindrical part (28a) of the piston valve, and oil paths (40) and (31) to lead the pressure of the pressure oil in the bridge path (21) to the close side end part of the piston valve when the spool is operated in the opposite direction are formed inside the spool, whereby, even when those directional control valves to which a regenerating check valve is added and those to which a regenerating valve is not added are mixed, the valve device can be made the same in size as that of the directional control valve to which a regenerating valve is not added.
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公开(公告)号：EP0620370A4
公开(公告)日：1995-04-19
申请号：EP93923655
申请日：1993-10-28
发明人： SUGIYAMA GENROKU , HIRATA TOICHI , NOZAWA YUSAKU , OCHIAI MASAMI
CPC分类号： E02F9/2225 , F15B13/0417
摘要： A hydraulic control valve device provided with spool type flow rate control valves (200A, 201A; 200; 204), wherein in order to control a flow rate of pressure oil supplied from a pump path (5) to a pair of main variable throttles (16A, 16B) through a feeder path (7) and to control a flow rate of pressure oil flowing into a pair of load paths (6A, 6B) in an auxiliary manner, direction changing-over valve devices (100A; 101A; 102A; 103A; 105A; 106A; 107A; 108A; 110A; 111A; 112A; 113A; 114A) comprises: (a) seat valves (300, 301) provided in the feeder path, having a seat valve body (20) movably provided in a housing (1) and forming an auxiliary variable throttle (28) in the feeder path and a variable control throttle (33) formed on the seat valve body, for varying an opening area in response to a distance of move of the seat valve body; (b) pilot lines (24, 29 - 31, 35 - 37) for allowing communication between the upstream side (7C) of the auxiliary variable throttle of the feeder path and the downstream sides (7A, 7B) of the feeder path through the variable control throttle to determine a distance of move of the seat valve body by a flow rate of pressure oil flowing through the above-described lines; and (c) pilot flow rate control valves (400; 401; 403; 405; 406; 407; 408) each having a pilot variable throttle (45) in a pilot line and means for receiving flow rate control signals to be input (800, 52 - 59, 159, 54 - 59, 231A, 231B, 251, 252), for varying an opening area of the pilot variable throttle in response to input flow rate control signals to thereby control flow rates of pressure oil flowing through the pilot lines.
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公开(公告)号：EP1088995A4
公开(公告)日：2006-04-05
申请号：EP00913095
申请日：2000-04-04
CPC分类号： F15B11/167 , E02F9/128 , E02F9/2225 , E02F9/226 , E02F9/2296 , F15B11/163 , F15B11/168 , F15B13/0417 , F15B2211/40515 , F15B2211/40569 , F15B2211/428 , F15B2211/455 , F15B2211/46 , F15B2211/50518 , F15B2211/50536 , F15B2211/5157 , F15B2211/55 , F15B2211/6355 , F15B2211/651 , F15B2211/71 , F15B2211/78
摘要： An oil passage slit (20) that is formed in the valve disc (50) of a flow dividing valve (5-1), a control chamber (70) and oil passage (31-1) are connected to a signal transmission oil passage (9), the oil passage slit (20) being formed with a lap portion (32) having a check valve function with a lap quantity X at the shut-off position of the valve disc (50), the oil passage (31-1) having a 2-position 3-way valve (11) installed therein. The valve (11) connects the control chamber (70) of the flow dividing valve (5-1) to the signal transmission oil passage (9) alone when there is no external signal (F), while when the external signal (F) is applied, it connects the control chamber (70) both to the signal transmission oil passage (9) and to a low pressure detection oil passage (35) connected to the outlet passage (5b) of a flow dividing valve (5-2) on the side of a hydraulic actuator (3-2). This ensures that during composite operation driving an inertial body, the pressure on the low load pressure side is detected as a signal pressure without shutting off a load pressure detection oil passage on the high load pressure side and that the portion for detecting the load pressure is simplified and the flow dividing function is not impaired.
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公开(公告)号：EP1205699A4
公开(公告)日：2003-08-13
申请号：EP01930130
申请日：2001-05-15
CPC分类号： F04B49/03 , Y10T137/2579 , Y10T137/2605 , Y10T137/2642
摘要： An unloading valve, wherein a spool (33) having a flange part (39) formed thereon is inserted into a spool bore (32) and a pressing force by a spring (52) is always added, through the flange part (39), to the spool (33) in a second pressure chamber (35), and an oil groove (60) is provided in the inner peripheral surface of the spool bore (32) near a contact surface (51) and a pressure oil with the same pressure (P2) as in the second pressure chamber (35) is led into the oil groove (60) through an oil path (61) provided in a valve main body (31), whereby, because the pressure oil invades through the oil groove (60) into a clearance between the flange part (39) and the contact surface (51) when the flange part is fitted closely to the contact surface, a cracking pressure due to a close fitting can be prevented from rising without lowering the strength of the flange part (39) so as to provide the stable opening and closing characteristics of the spool (33).
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公开(公告)号：EP0967398A4
公开(公告)日：2003-05-07
申请号：EP99900160
申请日：1999-01-11
CPC分类号： F15B11/05 , F15B13/0417 , F15B2211/20553 , F15B2211/30505 , F15B2211/30535 , F15B2211/355 , Y10T137/87169 , Y10T137/87185
摘要： Pressure compensating valves not requiring a portion for providing a hold check valve between the pressure compensating valves and direction control valves, and capable of simplifying relative equipment. The pressure compensating valves (3, l3) placed on inlet sides of the direction control valves (5, l5) are formed by using a spool (3-l) having different diameter portions, i.e. a larger-diameter portion (3a) and smaller-diameter portions (3b, 3c), pressure receiving chambers (3f, 3g) being provided on both sides of the larger-diameter portion so that a discharge pressure of a pump and inlet pressures of metering restrictions of the direction control valves work thereon, pressure receiving chambers (3j, 3p) being provided so that the outlet pressures of the metering restrictions and signal pressures work on smaller-diameter ends of the pressure receiving chambers (3f, 3g), a check valve (7) operated by the outlet pressures of the metering restrictions being inserted in the smaller-diameter end of the pressure receiving chamber (3p) to reduce the discharge pressure of the pump and generate a signal pressure, a sleeve (3r) both ends of which are positioned on a pressure receiving chamber (3q), into which the outlet pressures of the metering restrictions are introduced, and the pressure receiving chamber (3f) being fitted around the smaller-diameter portion (3b), the outlet pressures of the metering restrictions being introduced into the pressure-receiving chamber (3j) by this switching operation, this enabling the provision of a portion for providing a hold check valve between the pressure compensating valves and direction control valves to be omitted, and a valve apparatus to be simplified.
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公开(公告)号：EP0874090A4
公开(公告)日：2000-03-29
申请号：EP97908552
申请日：1997-03-31
发明人： TANAKA SOTARO , YASUDA GEN , OCHIAI MASAMI , NOZAWA YUSAKU , KATO HIDEYO
CPC分类号： E02F9/2296 , E02F9/2242 , E02F9/2292
摘要： Oil hydraulic pumps (3a, 3b) are connected to main pipe lines (105, 116, 107) through a delivery pipe line (102) and a feed pipe line (100). Branches (150A, 150C, 150E) are provided with flow control valves (15, 17, 19), which permit a pressure oil to flow to hydraulic oil cylinders (5a, 5b, 6, 7) from the oil hydraulic pumps (3a, 3b). A pressure oil tank (2) is connected to the main pipe lines (105, 116, 107) through a tank pipe line (103) and a discharge pipe line (101). Branches (151A, 151C, 151E) are provided with flow control valves (16, 18, 20), which permit a pressure oil to flow to the pressure oil tank (2) from the hydraulic cylinders (5a, 5b, 6, 7). A pipe line (104) branched from the delivery pipe line (102) is provided with a bypass valve (21), which serves to feed a desired amount of an oil delivered from the oil hydraulic pumps (3a, 3b) to the feed pipe line (100) and return the remainder of the oil to the pressure oil tank (2).
摘要翻译： 本发明涉及一种用于液压加工机械的液压驱动系统。 液压泵（3a，3b）通过输送管线（102）和供应管线（100）连接到主管线（105,116,107）。 分支部分（150A，150C，150E）包括用于允许液压流体从液压泵（3a，3b）流向液压缸（5a，5b，6,7）的流量控制阀（15,17,19）。 液压储存器（2）通过储存器管线（103）和排出管线（101）连接到主管线（115,106,117）。 分支部分（151A，151C，151E）包括用于允许液压流体从液压缸（5a，5b，6,7）流向液压储存器（2）的流量控制阀（16,18,20）。 操作装置（32,33）控制流量控制阀（10a-f）的相应行程量。 控制装置（131）控制流量控制阀（10a-f）和对应的第一流量控制装置（15,17,19,65,67,69）和第二流量控制装置（16,18,20,66,68） ，70）以相关方式驱动。
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公开(公告)号：EP0890747A4
公开(公告)日：1999-10-13
申请号：EP98900441
申请日：1998-01-20
CPC分类号： E02F9/2267 , E02F9/2225 , E02F9/2271 , E02F9/2296 , F15B11/05 , F15B2211/20553 , F15B2211/3053 , F15B2211/30555 , F15B2211/3144 , F15B2211/329 , F15B2211/35 , F15B2211/71 , F15B2211/78 , Y10T137/87169 , Y10T137/87185
摘要： Simplification of the casing structure of a directional control valve provided with a backward installation type flow dividing valve and the valve is achieved as follows. A pair of flow dividing valves (8) and hold check valves (9) are arranged between a pair of metering notches (6) having both functions of flow rate and directional control, formed in the land (4-1) of a spool (2), and a pair of actuator ports A, B. Respective hold check valves are provided with hollow spool-form valve discs (90) in which a seat (12) is formed at the outer periphery and the pressure of the outlet passage (10) connected to the actuator port acts in the closing direction of the valve. Respective flow dividing valves are provided with valve discs (80) fitted in these valve discs (90) so as to freely slide, facing the inlet passage (7) connected to the metering notch at the front face and facing the control pressure chamber (30) connected to a signal detection oil passage at the back face. The valve disc (90) is shaped to balance the pressure of the control pressure chamber. A slit (21) of a variable dead zone X2 is formed between the valve discs (80, 90) and the pressure between the outlet of the flow dividing valve and the inlet of the hold check valve is detected to transmit it to the control pressure chamber.
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