公开(公告)号：WO1996032587A1

公开(公告)日：1996-10-17

申请号：PCT/JP1996001006

申请日：1996-04-11

Applicant: KOMATSU LTD. ,  MORINO, Kenji ,  ODA, Yosuke ,  HAYASHI, Seita

Inventor： KOMATSU LTD.

IPC: F04B01/26

CPC classification number: F04B1/324 ,  F04B49/08

Abstract: An apparatus for controlling swash-plate pumps and motors, provided with a piston (40) fitted slidably in a cylinder bore (31) formed in a housing (20), a large-diameter pressure receiving chamber (43) and a small-diameter pressure receiving chamber (44) defined on both end sides of the piston and permitting the piston to be moved in one direction and in the other by a pressure oil in these chambers, a spool (47) slidably fitted in a spool bore (45) formed in an axial core portion of the piston, a first port (58), a second port (65) and a drain port (66) which are provided between the piston and spool and adapted to be put in a communicating state and shut-off state in accordance with the relative movements of the piston and spool, a third pressure receiving chamber (54) defined on one end side of the spool and adapted to move the spool in one direction by a pressure oil therein, and a spring (74) urging the piston and spool in the other direction, the piston and a swash-plate (4) being connected together so that, when the piston is moved, a tilt angle of the swash-plate varies, the small-diameter pressure receiving chamber communicating with the swash-plate type pump or a primary port (26) of a motor, the first port communicating with the small-diameter chamber and third pressure chamber, the second port communicating with the large-diameter pressure receiving chamber, the drain port communicating with a tank (18) via the interior of the housing, the first and second ports being shut off from each other with the second port and drain port communicating with each other when the piston is moved in one direction relatively to the spool, the first and second ports communicating with each other with the second port and drain port shut off from each other when the piston is moved in the other direction relatively to the spool.

Abstract translation: 一种用于控制旋转斜盘泵和电动机的装置，其具有可滑动地装配在形成在壳体（20）中的气缸孔（31）中的活塞（40），大直径压力接收室（43）和小直径 压力接收室（44），其限定在活塞的两端侧，并允许活塞在一个方向上移动，另一方面通过这些腔室中的压力油移动;可滑动地装配在阀芯孔（45）中的阀芯（47） 形成在活塞的轴向芯部中，设置在活塞和阀芯之间的第一端口（58），第二端口（65）和排出端口（66），并且适于处于连通状态， 根据活塞和阀芯的相对运动，关闭状态;限定在阀芯的一端侧并适于通过其中的压力油在一个方向上移动阀芯的第三压力接收室（54）和弹簧（74 ）向另一个方向推动活塞和阀芯，活塞和旋转斜盘（4）进入 g连接在一起，使得当活塞移动时，斜板的倾斜角度变化，小直径受压室与旋转斜盘式泵或电动机的主端口（26）连通，第一 所述第二端口与所述大直径压力接收室连通，所述排出口经由所述壳体的内部与罐（18）连通，所述第一和第二端口被关闭 当活塞相对于阀芯相对于一个方向移动时，第二端口和排出端口彼此连通，第一和第二端口彼此连通，第二端口和排出端口彼此断开，彼此断开， 活塞相对于阀芯沿另一个方向移动。

公开(公告)号：WO1989008198A1

公开(公告)日：1989-09-08

申请号：PCT/JP1989000205

申请日：1989-02-28

Applicant: KABUSHIKI KAISHA KOMATSU SEISAKUSHO ,  KARAKAMA, Tadao ,  ISHIZAKI, Naoki ,  ODA, Yosuke

Inventor： KABUSHIKI KAISHA KOMATSU SEISAKUSHO

IPC: F15B11/00

CPC classification number: F15B13/0842 ,  F15B13/0807 ,  F15B13/0892 ,  F15B13/0896 ,  F15B2013/006 ,  Y10T137/87201 ,  Y10T137/87209 ,  Y10T137/87885

Abstract: A pilot-operated valve device having a plurality of valves for controlling the operation of a hydraulic device such as a hydraulic cylinder, wherein the whole device is compactly formed such that a plurality of valves are mounted in small mounting space without causing them to be interfered be each other. The valve device can further be easily modified to meet a plurality of hydraulic devices. The valve device comprises a cuboidal valve housing (10), first and second pump ports (11, 12) extending in parallel and horizontally in upper portions near the opposite sides in the valve housing and communicating with the hydraulic pump, a tank port (13) formed in the lower central portion of the valve housing, a pilot tank port (25) formed in the central portion of the valve housing and communicating with the drain tank, first and second ports (14, 15) formed in different positions of the upper surface of the valve housing and extending vertically downward in the housing to communicate with pressure chambers of the hydraulic device, a plurality of valves (19, 20, 23, 24) inserted in a plurality of valve holes formed in the valve housing to open or close these ports, and pilot valves (31, 35) for controlling the supply of pressurized oil for pilot pressure to these valves.

公开(公告)号：WO1996008652A1

公开(公告)日：1996-03-21

申请号：PCT/JP1995001839

申请日：1995-09-14

Applicant: KOMATSU LTD. ,  ODA, Yosuke ,  MORINO, Kenji ,  ISHIZAKI, Naoki

Inventor： KOMATSU LTD.

IPC: F04B49/00

CPC classification number: F04B49/002 ,  F04B49/08 ,  F04B2201/1204 ,  F04B2205/08

Abstract: A capacitor controller of a variable capacity hydraulic pump comprising a capacity control cylinder (6) including a capacity control piston (6a) for driving a capacity control member (5) of a variable capacity hydraulic pump, and a large diameter chamber (7) and a small diameter chamber (10) disposed on both sides of the capacity control piston (6a), for driving the capacity control piston (6a) in a capacity decreasing direction by a pressure oil supplied to the large diameter chamber (7) and driving the capacity control piston (6a) in a capacity increasing direction by the pressure oil supplied to the small diameter chamber (10), a passage allowing the small diameter chamber (10) to communicate with a pump exhaust path (2), at least one control valve (8, 9) for controlling the capacity of the variable capacity pump by selectively allowing the large diameter chamber (7) to communicate with the pump exhaust passage (2) or with a tank (56), and a variable throttle valve (30) disposed in a passage which allows the large diameter chamber (7) to communicate with the pump exhaust passage (2) or with the tank (56), and controlling the flow of the pressure oil supplied to, or flowing out from, the large diameter chamber (7), wherein the variable throttle valve (30) can be switched between a first state where the throttle open area is inversely proportional to the self exhaust pressure of the pump exhaust passage (2) and a second state where the throttle open area is set to a predetermined open area by an external signal irrespective of the self exhaust pressure.

Abstract translation: 一种可变容量液压泵的电容器控制器，包括容量控制缸（6），容量控制缸（6）包括用于驱动可变容量液压泵的容量控制构件（5）的容量控制活塞（6a）和大直径室（7），以及 设置在容量控制活塞（6a）的两侧的小直径室（10），用于通过供给到大直径室（7）的压力油沿容积减小方向驱动容量控制活塞（6a），并驱动 容量控制活塞（6a）通过供给到小直径室（10）的压力油在容量增加方向上，允许小直径室（10）与泵排气路径（2）连通的通道，至少一个控制 阀（8,9），用于通过选择性地允许大直径腔室（7）与泵排气通道（2）或罐（56）连通，以及可变节流阀（30）来控制可变容量泵的容量 ） 允许大直径室（7）与泵排气通道（2）或罐（56）连通的通道，并且控制供应到大直径室（或从其流出）的压力油的流动 7），其中所述可变节流阀（30）可以在所述节气门开度与所述泵排气通道（2）的自排气压力成反比的第一状态和设定所述节气门开度区域的第二状态之间切换 通过外部信号到达预定的开放区域，而与自身排气压力无关。

公开(公告)号：WO1994010447A1

公开(公告)日：1994-05-11

申请号：PCT/JP1993001577

申请日：1993-10-29

Applicant: KABUSHIKI KAISHA KOMATSU SEISAKUSHO ,  ODA, Yosuke; ,  SHIRAI, Kiyoshi;

Inventor： KABUSHIKI KAISHA KOMATSU SEISAKUSHO

IPC: F04B49/00

CPC classification number: F04B49/002 ,  F04B49/08 ,  F04B2201/1202 ,  F04B2205/05

Abstract: A capacity control device in a variable capacity hydraulic pump comprising: a capacity control piston (6) provided with a large diameter chamber (7), for operating a capacity control member (5) of the variable capacity hydraulic pump (1) in a direction of decreasing or increasing the capacity by supplying or discharching pressure oil to or from said large diameter chamber (7); a first control valve (8) and a second control valve (9) for selectively allowing said large diameter chamber of said capacity control piston to communicate with a pump discharge path or a tank; said first control being set to a supply position by the pump discharge pressure and to a drain position by a spring linked with said capacity control piston through a feedback lever, and said second control valve being set to a first position for establishing communication between the pump discharge path and said large diameter chamber by the pump discharge pressure and to a second position for establishing communication between said large diameter chamber and said first control valve by negative pressure; wherein a flow sectional area of an oil path between said large diameter chamber and the pump discharge path or the tank is changed. With this arrangement, a change in the flow sectional area in an intermediate portion of the oil path can change the supply or discharge speed of the pump discharge pressure to the large diameter chamber of said capacity control piston, whereby the responsiveness of the capacity control of said variable hydraulic pump can be regulated, thereby improving the operability of a working machine.

Abstract translation: 一种变容量液压泵中的容量控制装置，包括：具有大直径室（7）的容量控制活塞（6），用于沿所述可变容量液压泵（1）的容量控制构件（5）的方向 通过向或从所述大直径腔室（7）供应或从所述大直径腔室（7）提供压力油或从所述大直径腔室（7）中提供压力油来降低或增加容量; 第一控制阀（8）和第二控制阀（9），用于选择性地允许所述容量控制活塞的所述大直径室与泵排出路径或罐连通; 所述第一控制器通过泵排出压力设定在供给位置，并通过与所述容量控制活塞连接的弹簧通过反馈杆设置在排放位置，并且所述第二控制阀设置在第一位置，用于建立泵 排出路径和所述大直径室，并且通过负压将所述大直径室和所述第一控制阀之间形成连通的第二位置; 其特征在于，所述大直径室与所述泵排出路径或所述罐之间的油路的流路截面积发生变化。 通过这种布置，油路的中间部分的流动截面积的变化可以改变泵排出压力对所述容量控制活塞的大直径室的供给或排出速度，由此，容量控制的响应性 所述可变液压泵可调节，从而提高作业机械的可操作性。

公开(公告)号：WO1989008199A1

公开(公告)日：1989-09-08

申请号：PCT/JP1989000206

申请日：1989-02-28

Applicant: KABUSHIKI KAISHA KOMATSU SEISAKUSHO ,  KARAKAMA, Tadao ,  ISHIZAKI, Naoki ,  ODA, Yosuke

Inventor： KABUSHIKI KAISHA KOMATSU SEISAKUSHO

IPC: F15B11/00

CPC classification number: F15B13/0842 ,  F15B13/0807 ,  F15B13/0892 ,  F15B13/0896 ,  F15B2013/006

Abstract: A pilot operated valve device having a plurality of valves for controlling the operation of a hydraulic device such as a hydraulic cylinder, wherein the whole device is compactly formed such that a plurality of valves are mounted in small mounting space without causing them to be interfered by each other. The valve device is provided with an assist for simultaneous application of pressured oil from two hydraulic pumps through the same hydraulic circuit as required. The device comprises a cuboidal valve housing (10); first and second pump ports (11, 12) extending in parallel and horizontally in upper portions near two opposite sides in the valve housing and communicating with a first hydraulic pump; a tank port (13) extending horizontally through the center in the valve housing and communicating with the drain tank; a pilot tank port (25) and an auxiliary pilot tank port that run over and under the above tank port in parallel therewith and in a horizontal direction in the valve housing; first and second auxiliary pump ports (81, 82) extending in parallel and horizontally in lower portions near two opposite sides in the valve housing and communicating with a second hydraulic pump; a plurality of valves (19, 20, 23, 24, 88, 98) inserted in the valve holes formed in the valve housing to open or close these ports; and a plurality of pilot valves (31, 32, 87, 97) for controlling the supply of pressure oil for pilot pressure to these valves.

公开(公告)号：WO1989008197A1

公开(公告)日：1989-09-08

申请号：PCT/JP1989000204

申请日：1989-02-28

Applicant: KABUSHIKI KAISHA KOMATSU SEISAKUSHO ,  KARAKAMA, Tadao ,  ISHIZAKI, Naoki ,  ODA, Yosuke

Inventor： KABUSHIKI KAISHA KOMATSU SEISAKUSHO

IPC: F15B11/00

CPC classification number: F15B13/0842 ,  E02F9/2267 ,  F15B13/0807 ,  F15B13/0892 ,  F15B13/0896 ,  F15B2013/006 ,  Y10T137/87241

Abstract: An operation valve device having a plurality of valves for controlling the operation of a hydraulic equipment such as a hydraulic cylinder, wherein the whole device is compactly formed such that a plurality of valves are mounted in small mounting space without causing them to be interfered by each other. The operation valve device can further be easily constituted to meet a plurality of hydraulic devices. The operation valve device comprises a cuboidal valve housing (10), first and second pump ports (11, 12) formed in parallel in upper portions near two opposite sides in the valve housing, a tank port (13) formed in the lower central portion in the valve housing, first and second ports (14, 15) formed in different positions of the upper surface of the valve housing to communicate with pressure chambers of the hydraulic device and extending vertically downward in the valve housing, and a plurality of valves (19, 20, 23, 24) inserted in a plurality of valve holes formed in the valve housing to open or close these ports.

公开(公告)号：WO1996032593A1

公开(公告)日：1996-10-17

申请号：PCT/JP1996001005

申请日：1996-04-11

Applicant: KOMATSU LTD. ,  MORINO, Kenji ,  ODA, Yosuke

Inventor： KOMATSU LTD.

IPC: F15B11/00

CPC classification number: F15B11/05 ,  F04B49/08 ,  F04B2205/06 ,  F04B2205/08 ,  F04B2205/18 ,  F15B2211/20523 ,  F15B2211/20538 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/253 ,  F15B2211/40507 ,  F15B2211/50563 ,  F15B2211/528 ,  F15B2211/57 ,  F15B2211/6057 ,  F15B2211/7135

Abstract: A displacement controlling device for a variable displacement type hydraulic pump comprising a cylinder (21) for varying the displacement of a variable displacement type hydraulic pump (2), a control valve (26) for controlling the supply and discharge of discharging pressure of the variable displacement type hydraulic pump to and from the cylinder, a fixed displacement type hydraulic pump (3) driven together with the variable displacement type hydraulic pump by the same engine (1), and a throttle valve (18) provided along a discharge line of the fixed displacement type hydraulic pump, wherein the control valve is changed over by virtue of comparison between a differential pressure between the discharge pressure and a loading pressure and a set differential pressure, which is a differential pressure across the throttle valve so as to control the displacement of the variable displacement type hydraulic pump via the cylinder, whereby the differential pressure is made to be a certain value that matches the set differential pressure.

Abstract translation: 一种用于可变排量型液压泵的排量控制装置，包括用于改变可变排量型液压泵（2）的排量的缸（21），用于控制变量的排出压力的供给和排出的控制阀（26） 位移型液压泵来自缸体，与同一发动机（1）一起与变量型液压泵一起驱动的固定排量型液压泵（3）和沿着排气管 固定位移型液压泵，其中通过比较排出压力和负载压力之间的压差和设定的压差（其是节流阀两端的压差）来控制控制阀，从而控制排量 通过气缸的可变排量型液压泵，由此将压差设定为一定值 匹配设定的压差。