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JP4194868B2 |
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JP2008291864A |
To provide a cylinder drive unit of simple and compact structure capable of accurately controlling the rod position even in the case wherein noload is applied to an actuator cylinder.There are assembled in the same unit an air tank, when...
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JP4191430B2 |
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JP4171666B2 |
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JP4152123B2 |
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JP2008169964A |
To provide a hydraulic servo cylinder system which can be used under a high-temperature environment.A pneumatic motor (5) is used as a power source. A bidirectional hydraulic pump (4) is turned by the power of the pneumatic motor (5), an...
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JP4116271B2 |
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JP4098101B2 |
The assembly has a master actuator (10) and a slave actuator (20) with cylinder and a piston defining two chambers. A chamber is connected to an outlet of a control valve connected to a hydraulic control circuit (50) and to a control uni...
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JP4099006B2 |
In a construction machine comprising an electric motor 6 for driving a rotational system, an operating member for instructing an operation of the electric motor 6, and a controller 9 for controlling the electric motor 6 according to an o...
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JP4088894B2 |
A valve includes a housing with an elongated bore having a longitudinal axis and a spool reciprocatingly mounted within the bore for relative movement along the bore parallel to the axis. The housing has a housing passageway and the spoo...
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JP2008064306A |
To provide a mechanism for preventing the operation of a mechanical component when a failure occurs in a hydraulic component connected to the mechanical component.This hydraulic system comprises an isolator 72 built therein near a hydrau...
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JP4058346B2 |
The invention relates to a controller for an unbalanced mass adjusting unit in a vibration exciter. Said controller comprises an adjusting piston (3) for changing the relative position of unbalanced masses in the vibration exciter (1) th...
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JP4022032B2 |
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JP2007303583A |
To provide a servo valve control device having a control property for smoothing and stabilizing the controlled variable of a servo valve applied for position control. The servo valve control device comprises the servo valve, a setting pa...
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JP2007272611A |
To provide a controller for a servo valve allowing setting of a target value having a wide dynamic range in fluid pressure control, and allowing acquisition of a stable control characteristic even in a nonlinear area. This controller for...
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JP3952094B2 |
To increase the operability, by receiving the position of tools and operator's command signals and correcting the signals and controlling a hydraulic cylinder. A joy stick position detector 220 detects the position of a joy stick control...
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JP3927043B2 |
To provide a feedback mechanism and a valve positioner which prevent the wear and breakage by improving the vibration-proof structure to improve the reliability, and extend a service life. The feedback mechanism 24 comprises a feedback p...
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JP3904173B2 |
To provide a hydraulic controller for a working 4 vehicle capable of improving the working efficiency by enhancing the excavation capacity even though the excavated soil is hard and of improving the wear resistance of tire. This controll...
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JP3900537B2 |
Apparatus and method for controlling at least one hydraulic cylinder by the hydraulic fluid discharged by a hydraulic pump through a control valve. The hydraulic control system includes sensors to sense the conditions of the system and p...
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JP2007057098A |
To provide a fluid operation type position adjustment device including a servo means.A supply connecting section 22, a discharge connecting section 23, and a power connecting section 24 are provided adjustably by the servo means 12 arran...
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JP2007040513A |
To provide a pilot valve for a positioner preventing the damage of a diaphragm or the like supporting a spool while facilitating replacement of the pilot valve.The pilot valve for the positioner comprises a supply air pressure chamber 22...
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JP3880755B2 |
To provide a small electric hydraulic servomotor. In the electric hydraulic servomotor 100 for rotating an output shaft 61 according to a rotating speed difference between a rotary shaft 41 and an output shaft 61, a longitudinal groove 7...
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JP2006329314A |
To provide a press bonding device using one differential pressure cylinder for increasing a machine tact (a working speed) without using a high speed actuator, separately.The press bonding device comprises a high pressure side first pres...
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JP3851137B2 |
To provide a high speed driving method and its apparatus for a pressure cylinder capable of swiftly eliminating a wasteful working stroke of a piston rod and a driving lag of the piston rod and improving working efficiency. A servo valve...
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JP2006316949A |
To provide a zero adjustment arm used in a positioner capable of effectively preventing harmful effects due to high frequency vibration.The zero adjustment arm is used in the positioner provided with a pilot valve 21 supplying air to a d...
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JP3127171U |
To provide an air cylinder driving device capable of performing precise position control and force control by using an air cylinder having a rod conventionally used for ON / OFF control. An air cylinder 1 having a rod, an air servo valve...
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JP3844167B2 |
To avoid the stop of the whole control system of a servo valve by outputting the command signal to a spool driving means through a separately provided output means when an abnormality is present in a displacement sensor or a feedback mec...
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JP2006300187A |
To provide a hydraulic servo device applicable to various industrial hydraulic machines including a machine tool such as a press, and to accurately control a stroke position of a hydraulic cylinder regardless of the kind of a workpiece.A...
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JP2006522299A |
A position control system is used for controlling a fluid operated cylinder having at least one fluid chamber defined by a piston located within a housing for movement between first and second end limits of travel. The system includes at...
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JP3825737B2 |
To provide a precision positioning device capable of realizing high precision positioning control and load control in the Z-direction only by an air cylinder and one servo valve as mechanical elements of a driving source. The precision p...
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JP3814807B2 |
To provide a method and an apparatus of controlling a solenoid valve of an automatic transmission for a vehicle which is capable of regularly controlling a plunger even though movement of a plunger appeared by physical characteristic of ...
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JP2006220306A |
To provide an electric hydraulic motor capable of avoiding that a return oil passage becomes very high pressure.The electric hydraulic motor is connected to a hydraulic actuator for revolving an output shaft 21 by the working oil pressur...
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JP3810140B2 |
To eliminate the need for releasing the hydraulic pressure acting on a hydraulic acator to restrict the generation of switching shock when switching between different feedback signals is performed. Between a control means 7 which compare...
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JP3788604B2 |
To continuously keep an abnormal servo control valve 39 separated from a control system and to make the servo control valve 39 having recovered from the abnormality reusable. When the movement of a control member 41 of the servo control ...
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JP3764692B2 |
To provide a gate opening/closing apparatus capable of dissolving defectiveness of having only the fixed lifting speed in a previously proposed device which opens/closes by a hydraulic cylinder instead of opening/closing a gate by an ord...
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JP2006090553A |
To provide a method of quickly, easily and inexpensively assembling a servo valve in safety at a hydraulically-centered position.This method of assembling the servo valve at a position hydraulically centered with respect to an output sha...
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JP3761926B2 |
To quickly, easily and safely assemble a servo valve in a position centered under hydraulic pressure by centering the servo valve rotating a valve housing, pushing a preliminary assembling unit in the valve housing, and mutually pressing...
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JP3761246B2 |
To provide a servo controller which can eliminate a response delay as much as possible. A correction means 6 is provided for receiving an object value signal a feedback signal b at control output means 5 on the basis of a deviation of th...
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JP3754583B2 |
To easily and accurately measure and identify static characteristics or a system parameter by using various hydraulic pressure equipment elements as targets. An arithmetic operation along a block diagrams constituted on a BDSP 4 and a co...
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JP3755963B2 |
To dissolve such an inconvenience that the operation of a hydraulic actuator becomes instable in the second half of a deceleration deviation range in the case of adopting an electromagnetic switching valve low in frequency characteristic...
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JP3749524B2 |
A proportional hydraulic valve has a primary control spool with a force feedback actuator attached to one end, wherein the control spool meters flow of fluid to a work port. The force feedback actuator includes a piston coupled to the co...
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JP2006040200A |
To provide a position control system for suppressing oil leakage from the valves and performing accurate position control of the controlled object by controlling oil flow rate using poppet type solenoid valves, in the position control sy...
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JP2006029366A |
To provide a position control method and a device for a hydraulic closed circuit improving position control by controlling thrust and speed of a single rod cylinder and a rod displacement position of the single rod cylinder.Pressure sens...
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JP3740230B2 |
To prevent shock at the time of braking by imputting the empirical value as the initial value of back pressure deceleration stroke and time lag, outputting a back pressure command signal when piston displacement satisfies the condition o...
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JP3725259B2 |
To reduce the occurrence of the strain of a response waveform to an input waveform and improve stability of a control system. A control device for a hydraulic exciter comprises a cylinder 4 to control the feed an discharge of working oil...
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JP3718001B2 |
To provide a hydraulic device which can be driven and controlled by directly connecting a plurality of hydraulic actuators to a single hydraulic pump. A hydraulic pump 1 is used which is driven by an electric motor 6 and can be rotated i...
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JP2005315279A |
To provide a positioning device of small construction capable of being embodied in a simple constitution and reducing the center height loss.The positioning device is equipped with a cylinder device consisting of a cylinder, a hollow sha...
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JPWO2004007973A1 |
It is an object of the present invention to provide an electro-fluid pressure actuation system capable of preventing a shortage of the amount of fluid supplied to the fluid pressure actuator of a plurality of electro-fluid pressure actua...
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JP3713877B2 |
To provide a speed control device for a tilt cylinder formed so as to reduce a shock in a stroke end by automatically decelerating a speed of the tilt cylinder when it comes adjacent to the stroke end, when a mast is tilt operated. Betwe...
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JP3701511B2 |
To relax a trangent in switching to a mechanical back up mode and to ensure a predetermined actuator speed in the mechanical back up mode. A restriction means 40 which can restrict a switching speed of a directional control valve 33 is p...
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