子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | CYLINDER DEVICE | EP15850577.6 | 2015-10-08 | EP3109504A1 | 2016-12-28 | OGAWA, Takayuki |
A cylinder device (C1) includes a recess (2a) provided on either one of the piston (2) and the cylinder (1), the recess (2a) facing the other one of the piston (2) and the cylinder (1); an extension-side discharge passage (6) configured to permit only a flow of liquid from the extension-side chamber (R1) toward the recess (2a); a compression-side discharge passage (7) configured to permit only a flow of liquid from the compression-side chamber (R2) toward the recess (2a); a tank-side discharge passage (8) configured to allow the extension-side discharge passage (6) and the compression-side discharge passage (7) to communicate with the tank (T) through the recess (2a); an extension-side damping force generation passage (9) configured to apply a resistance to a flow of liquid passing therethrough so as to exert a damping force during extension; and a compression-side damping force generation passage (10) configured to apply a resistance to a flow of liquid passing therethrough so as to exert a damping force during contraction. |
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| 162 | VEHICLE CONTROL DEVICE | EP11856508.4 | 2011-01-18 | EP2666994B1 | 2016-04-20 | SHIMADA, Hiroshi; SHIMADA, Michihito; TAKAGI, Masashi; OHBAYASHI, Motonari; KODAMA, Shinya; KIDA, Akihiro; ONISHI, Akito; OISHI, Toshiya; KITAMURA, Takamasa |
| 163 | ENGINE CONTROL METHOD OF CONSTRUCTION MACHINE | EP11878350 | 2011-12-28 | EP2799692A4 | 2016-01-27 | YUN SEONG-GEUN; PARK SUNG-BOK; JEE SE-RIB |
| An engine control system for a construction machine is disclosed, which can compulsorily stop engine driving when an attachment or the like malfunctions against an operator's intention during the operation of an excavator or the like. The engine control system includes a first step of determining whether pilot signal pressure, which is detected when at least one of an operation lever and a traveling pedal for respectively operating an attachment, a swing device, and a traveling device is operated, exceeds a first set pressure, and a second step of determining whether the pressure on the outlet side of a main hydraulic pump exceeds a second set pressure, wherein if the pilot signal pressure detected in the first step does not exceed the first pressure and the pressure of the main hydraulic pump detected in the second step exceeds the second pressure, engine driving is compulsorily stopped by means of a control signal from the controller. | ||||||
| 164 | A HYDRAULIC SYSTEM AND A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM | EP15171890.5 | 2011-05-31 | EP2940319A1 | 2015-11-04 | Heybroek, Kim; Wiktor, Roland |
As such, the present invention relates to a hydraulic system (10) for a working machine (101). The hydraulic system (10) comprises a hydraulic actuator (12) and a first hydraulic machine (14) for supplying fluid to the hydraulic actuator (12). The hydraulic system (10) further comprises a hydraulic transformer (28) for supplying fluid to the hydraulic actuator (12) in parallel with the first hydraulic machine (14), and an accumulator (38) for fluid. The hydraulic transformer (28) comprises a first port (30) and a second port (32) and the transformer (38) is adapted to transform a first pressure and a first flow at the first port (30) to a second pressure and a second flow at the second port (32). The second port (32) of the hydraulic transformer (28) is in fluid communication with the hydraulic actuator (28) and the first port is in communication with the accumulator (38).
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| 165 | HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINERY AND CONTROL DEVICE FOR SAME | EP13827990.6 | 2013-04-11 | EP2884117A1 | 2015-06-17 | HASHIMOTO, Hirofumi |
A hydraulic circuit for a construction machine including a center bypass passage, into which a pressurized oil discharged from a hydraulic pump may be supplied, including a directional control valve group including a plurality of directional control valves arranged in tandem with the center bypass passage; and a bleed-off valve arranged in the center bypass passage on a downstream side of the directional control valve group, wherein each directional control valve includes a first internal passage for causing the pressurized oil supplied to the directional control valve to flow out to the center bypass passage and a second internal passage for supplying the pressurized oil to a cylinder port, wherein a parallel passage is formed by the center bypass passage and the first internal passage by causing, by the first internal passage, the pressurized oil discharged from the hydraulic pump to flow out to the center bypass passage on the downstream side of the directional control valve, wherein the second internal passage supplies the pressurized oil from the center bypass passage through an opening of a spool and/or the bypass passage to the cylinder port. |
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| 166 | A HYDRAULIC SYSTEM AND A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM | EP11866576 | 2011-05-31 | EP2715154A4 | 2014-12-10 | HEYBROEK KIM; WIKTOR ROLAND |
| As such, the present invention relates to a hydraulic system (10) for a working machine (101). The hydraulic system (10) comprises a hydraulic actuator (12) and a first hydraulic machine (14) for supplying fluid to the hydraulic actuator (12). The hydraulic system (10) further comprises a hydraulic transformer (28) for supplying fluid to the hydraulic actuator (12) in parallel with the first hydraulic machine (14), and an accumulator (38) for fluid. The hydraulic transformer (28) comprises a first port (30) and a second port (32) and the transformer (38) is adapted to transform a first pressure and a first flow at the first port (30) to a second pressure and a second flow at the second port (32). The second port (32) of the hydraulic transformer (28) is in fluid communication with the hydraulic actuator (28) and the first port is in communication with the accumulator (38). | ||||||
| 167 | VEHICLE CONTROL DEVICE | EP11856508 | 2011-01-18 | EP2666994A4 | 2014-01-22 | SHIMADA HIROSHI; SHIMADA MICHIHITO; TAKAGI MASASHI; OHBAYASHI MOTONARI; KODAMA SHINYA; KIDA AKIHIRO; ONISHI AKITO; OISHI TOSHIYA; KITAMURA TAKAMASA |
| A vehicle control device 1, that controls to suppress a driving force of a vehicle based on an operation of a brake pedal 60 operated when a braking force is generated by a braking device 40, wherein the brake pedal 60 is connected to a brake booster 44, that increases an operating force input to the brake pedal 60 by using a brake negative pressure to transmit to brake fluid of the braking device 40 in order to appropriately control by appropriately detecting the operation of the brake pedal 60; and the driving force is suppressed according to an M/C pressure when the brake negative pressure is higher than a brake negative pressure threshold value, and the driving force is suppressed according to an operation state of the brake pedal 60 when the brake negative pressure is equal to or lower than the brake negative pressure threshold value. | ||||||
| 168 | HYDRAULIC SYSTEM WITH RETURN PRESSURE CONTROL | EP11711229.2 | 2011-03-21 | EP2652341A1 | 2013-10-23 | LOWMAN, Roger; FRANZONI, Germano; HARSIA, Jarmo |
| A hydraulic system (10) includes an electronically-controlled counter-pressure valve (60) that enables backpressure in a return line (36) of the system to be varied by a control unit (64). The system allows active control of the pressure in the return line to produce different return pressures for different situations. A higher return line pressure may be set to improve make-up or recirculating flow through an anti-cavitation valve (50). This may improve controllability of functions that benefit from backpressure, such as lowering loads (12). The control unit that controls the counter-pressure valve may take into account any of a wide variety of possible inputs when setting the counter-pressure valve. | ||||||
| 169 | COUNTER-BALANCE VALVE | EP95934832.7 | 1995-10-18 | EP0787904B1 | 2000-06-07 | ARAI, Mitsuru; HAYASHI, Seita; NUNOTANI, Sadao; KADO, Hideki |
| A counter-balance valve having the construction wherein a valve hole having first and second pump-side ports, first and second motor-side ports and an auxiliary port, a spool fitted to the valve hole slidably in the transverse direction and establishing or cutting off communication between ports, right and left springs for holding the spool at a neutral position at which communication between ports is cut off, a left pressure receiving chamber for moving the spool to a first travelling position at which the first pump-side port communicates with the auxiliary port and the second pump-side port communicates with the second motor-side port by a pressure oil supplied, and a right pressure receiving chamber for moving the spool to a second travelling position at which the second pump-side port communicates with the auxiliary port and the first pump-side port communicates with the first motor-side port by the pressure oil supplied, are provided to a valve main body, first shaft hole communicating with the left pressure receiving chamber, a second shaft hole communicating with the right pressure receiving chamber, first and second small diameter holes allowing normally the first and second shaft holes to communicate with the first and second pump-side ports and first and second large diameter holes for allowing the first and second shaft holes to communicate with the outer peripheral surface of the spool are formed on the spool, respectively, the first and second large diameter holes are closed when the spool exists at the neutral position and at the position between the neutral position and the first and second travelling positions, and the first and second large diameter holes communicate with the auxiliary port when the spool exists at the first and second travelling positions. | ||||||
| 170 | HYDRAULIC PRESSURE CONTROL DEVICE AND BRAKING SYSTEM | US15769483 | 2016-09-02 | US20180304875A1 | 2018-10-25 | Takahiro YAMAGUCHI; Chiharu NAKAZAWA |
| Provided is a hydraulic pressure control device and a braking system, which are capable of increasing a degree of freedom in layout of oil passages inside a housing. The hydraulic pressure control device includes a normally-closed type electromagnetic valve and a normally-open type electromagnetic valve. The normally-closed type electromagnetic valve includes a first valve part arranged so as to extend from a surface of the housing to an inside of the housing, and is configured to close an oil passage when a current is not supplied. The normally-open electromagnetic valve includes a second valve part being arranged so as to extend from the surface of the housing to the inside of the housing and having an axial length set to be equal to an axial length of the first valve part, and is configured to open the oil passage when a current is not supplied. | ||||||
| 171 | PUMP UNIT AND ACTUATOR | US15578522 | 2016-06-02 | US20180156214A1 | 2018-06-07 | Takayuki OGAWA; Takuya KOUGE |
| There is provided a pump unit capable of shortening the overall length thereof and maintaining mechanical efficiency even after long-term use and also to provide an actuator having such a pump unit, the pump unit (U) includes a hydraulic pump (P), a motor (M), a coupling (8) coupling a drive shaft (2) of the hydraulic pump (P) and a shaft (7) of the motor (M), a holder (H) having a housing portion (L) that is hollow and houses the coupling (8), and an introduction passage (D) that guides the hydraulic oil to the housing part (L). | ||||||
| 172 | HYDRAULIC DRIVE SYSTEM OF CONSTRUCTION MACHINE | US15556016 | 2016-03-07 | US20180058040A1 | 2018-03-01 | Akihiro KONDO |
| A hydraulic drive system of a construction machine includes: a control valve configured such that an opening area of a center bypass passage gradually decreases in accordance with increase in an operation signal; an operation device that outputs the operation signal; a bleed-off line; and a bleed-off valve that includes a pilot port to which a secondary pressure from a solenoid proportional valve is led, the bleed-off valve being configured such that: a bypass passage is open until the operation signal exceeds a first setting value, and the bypass passage is closed when the operation signal exceeds the first setting value; and an unloading passage is opened when the operation signal exceeds a second setting value, and an opening area of the unloading passage gradually decreases until the operation signal that has exceeded the second setting value reaches a third setting value. | ||||||
| 173 | HYDRAULIC CONTROL SYSTEM FOR WORK MACHINE | US15504864 | 2015-08-28 | US20170268540A1 | 2017-09-21 | Hidekazu MORIKI; Shinya IMURA; Tsutomu UDAGAWA; Ryohei YAMASHITA; Kouji ISHIKAWA |
| A work machine including a specific actuator that supplies hydraulic fluid from a plurality of hydraulic pumps includes: first and second hydraulic pumps communicating with a first hydraulic actuator; a first control valve returning hydraulic fluid delivered by the first hydraulic pump to a tank; and a load detection section that detects a load on the first hydraulic actuator. A control valve drive section drives the first control valve such that a communication area between the first hydraulic pump and the tank is enlarged corresponding to an increase in the load on the first hydraulic actuator; and a flow rate control section, during supply of the hydraulic fluid from the first and second hydraulic pumps to the first hydraulic actuator, controls to reduce a delivery flow rate of the first hydraulic pump corresponding to an increase in the load on the first hydraulic actuator. | ||||||
| 174 | Engine control method of construction machine | US14368909 | 2011-12-28 | US09664208B2 | 2017-05-30 | Seong-Geun Yun; Sung-Bok Park; Se-Rib Jee |
| An engine control system for a construction machine is disclosed, which can compulsorily stop engine driving when an attachment or the like malfunctions against an operator's intention during the operation of an excavator or the like. The engine control system includes a first step of determining whether pilot signal pressure, which is detected when at least one of an operation lever and a traveling pedal for respectively operating an attachment, a swing device, and a traveling device is operated, exceeds a first set pressure, and a second step of determining whether the pressure on the outlet side of a main hydraulic pump exceeds a second set pressure, wherein if the pilot signal pressure detected in the first step does not exceed the first pressure and the pressure of the main hydraulic pump detected in the second step exceeds the second pressure, engine driving is compulsorily stopped by means of a control signal from the controller. | ||||||
| 175 | HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE | US15323335 | 2015-05-26 | US20170145661A1 | 2017-05-25 | Hitoshi IWASAKI |
| A recycling passage 71 is configured to perform “pressure oil recycling,” in which the recycling passage 71 feeds boom discharge oil 35Fo (recycling discharge oil) discharged from a boom cylinder 23F (a recycling actuator), to the boom cylinder 23F (an actuator actuated with feeding of discharge oil from a second pump 12). A first sensing pressure rising passage 81 feeds a part of boom discharge oil 35Fo to a first unload passage 31 upstream of a first pressure sensing unit 61p when the pressure oil recycling is performed. | ||||||
| 176 | CYLINDER DEVICE | US15124866 | 2015-10-08 | US20170023086A1 | 2017-01-26 | Takayuki OGAWA |
| A cylinder device includes a recess provided on either one of the piston and the cylinder, the recess facing the other one of the piston and the cylinder; an extension-side discharge passage configured to permit only a flow of liquid from the extension-side chamber toward the recess; a compression-side discharge passage configured to permit only a flow of liquid from the compression-side chamber toward the recess; a tank-side discharge passage configured to allow the extension-side discharge passage and the compression-side discharge passage to communicate with the tank through the recess; an extension-side damping force generation passage configured to apply a resistance to a flow of liquid passing therethrough so as to exert a damping force during extension; and a compression-side damping force generation passage configured to apply a resistance to a flow of liquid passing therethrough so as to exert a damping force during contraction. | ||||||
| 177 | HYDRAULIC SYSTEM WITH RETURN PRESSURE CONTROL | US13994927 | 2011-03-21 | US20130298542A1 | 2013-11-14 | Roger Lowman; Germano Franzoni; Jarmo A. Harsia |
| A hydraulic system (10) includes an electronically-controlled counter-pressure valve (60) that enables backpressure in a return line (36) of the system to be varied by a control unit (64). The system allows active control of the pressure in the return line to produce different return pressures for different situations. A higher return line pressure may be set to improve make-up or recirculating flow through an anti-cavitation valve (50). This may improve controllability of functions that benefit from backpressure, such as lowering loads (12). The control unit that controls the counter-pressure valve may take into account any of a wide variety of possible inputs when setting the counter-pressure valve. | ||||||
| 178 | Counter balance valve | US817414 | 1997-04-16 | US06068013A | 2000-05-30 | Mitsuru Arai; Seita Hayashi; Sadao Nunotani; Hideki Kado |
| In a counter balance valve, a valve body is provided with a valve bore having first and second pump-side ports, first and second motor-side ports and an auxiliary port. A spool is slidably fitted in the valve bore in a longitudinal direction thereof to establish and block communication between the respective ports. Left and right springs maintain the spool at a neutral position in which the respective ports are closed. A left pressure receiving chamber shifts the spool by a pressure oil supplied therein to a first travelling position at which the first pump-side port and the auxiliary port are communicated with each other and the second pump-side port and the second motor-side port are also communicated with each other. A right pressure receiving chamber shifts the spool by a pressure oil supplied therein to a second travelling position at which the second pump-side port and the auxiliary port are communicated with each other and the first pump-side port and the first motor-side port are communicated with each other. The spool is formed with a first axial bore communicated with the left pressure receiving chamber, a second axial bore communicated with the right pressure receiving chamber, first and second small diameter bores communicating the first and second axial bores with the first and second pump-side ports, respectively, and first and second large diameter bores communicating the first and second axial bores with an outer peripheral surface of the spool. | ||||||
| 179 | Pressurized fluid directional flow control valve assembly | US941748 | 1992-09-08 | US5295429A | 1994-03-22 | Robert J. Monk |
| A valve assembly is disclosed in two embodiments for selectively controlling pressurized fluid flow to operate a fluid operated working cylinder and piston. The valve assembly includes a valve body, groups of three bores operably paired in the body, biased plunger valves interposed in each of the bores, and a separate passage inter-connecting between each bore group on one side of the interposed valves. There is provided a pressure connection to a first one of the bores in each group on the other side of the interposed valves away from the passage and a first side cylinder connection to a second one of said bores in one of each pair of groups. The other cylinder connection is provided to a second one of the other one of each pair of groups of three bores while an exhaust connection is provided to a third one of the bores in each group. A control is operable for selectably actuating the interposed valves for proper inter-connection between the passage, valves and corresponding connection to provide either contraction, extension or a neutral condition for the working piston and cylinder. | ||||||
| 180 | Control circuit of actuator | US491112 | 1974-07-23 | US3996840A | 1976-12-14 | Masayuki Futamata; Hidenori Sato |
| A control circuit for an actuator having an operation valve for selectively distributing hydraulic oil from a pump to plural actuators which has a plurality of conduits, a plurality of pilot-operated valves for controlling the flow direction of oil to the actuator side or the tank side, and a pilot spool valve, whereby the operating force of the operation valve can be greatly reduced in simple operation. | ||||||
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