EP0567698A1 - Dispositif d'entrée - Google Patents

Dispositif d'entrée Download PDF

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Publication number
EP0567698A1
EP0567698A1 EP92303846A EP92303846A EP0567698A1 EP 0567698 A1 EP0567698 A1 EP 0567698A1 EP 92303846 A EP92303846 A EP 92303846A EP 92303846 A EP92303846 A EP 92303846A EP 0567698 A1 EP0567698 A1 EP 0567698A1
Authority
EP
European Patent Office
Prior art keywords
input apparatus
passage
shuttle
control section
hydraulic
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.)
Granted
Application number
EP92303846A
Other languages
German (de)
English (en)
Other versions
EP0567698B1 (fr
Inventor
Yoshitake Yonekubo
Hideshi Koiwai
Susumu Narita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KYB Corp
Original Assignee
Kayaba Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Priority to US07/875,642 priority Critical patent/US5251534A/en
Priority to DE1992622843 priority patent/DE69222843T2/de
Priority to EP19920303846 priority patent/EP0567698B1/fr
Priority to US07/991,567 priority patent/US5348049A/en
Publication of EP0567698A1 publication Critical patent/EP0567698A1/fr
Application granted granted Critical
Publication of EP0567698B1 publication Critical patent/EP0567698B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2004—Control mechanisms, e.g. control levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
    • F15B13/0424—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks the joysticks being provided with electrical switches or sensors

Definitions

  • This invention relates to an input apparatus adapted to be mounted on a machine equipped with a plurality of actuator driving circuits such as a civil engineering equipment, a construction equipment or the like. Also, the present invention relates to an input apparatus adapted to control its output by means of an external signal input thereto as well as by operation through its own control section.
  • Such an input apparatus is generally constructed in such a manner as shown in Fig. 1. More particularly, the input apparatus which is a hydraulic type includes a body 10 and a control lever 12 mounted on a central position of an upper portion of the body 10 so as to act as a control section. The control lever 12 is arranged so as to be inclinedly moved in two directions perpendicular to each other or X and Y directions. Also, on the body 10 are four push rods 14, which comprise one set of two push rods 14 arranged in an X direction and the other set of two push rods 14 arranged in a Y direction perpendicular to the X direction. Each set of push rods 14 corresponds to each one actuator (not shown). Thus, it will be noted that the input apparatus shown in Fig. 1 is so constructed that the single control lever 12 operates two actuators.
  • the body 10 is formed therein with a chamber 16 in correspondence to each of the push rods 14 in a manner to be positioned below the push rod.
  • a block 18 which is operatively connected at an upper end thereof to the push rod 14 and provided on a lower end thereof with a plate 20.
  • a spool 22 To the plate 20 is operatively connected a spool 22 in a manner to be vertically movable, which spool 22 is formed in a lower portion thereof with a passage 24.
  • the passage 24 is formed at an upper portion thereof with a port 26 which communicates with an exterior of the input apparatus as described below.
  • the spool 22 has a support member 28 securely fitted on an intermediate portion thereof. Another support member 30 is fixedly arranged on the above-described lower end of the block 18 in a manner to surround the plate 20.
  • Each of the chambers 16 is also provided therein with a coiled spring 32 so as to be interposedly arranged between the support member 30 and a bottom of the chamber 16.
  • Another coiled spring 34 is arranged between the support member 28 and the support member 30 in a manner to be position inside the first spring 32 and a further coiled spring 36 is arranged inside the coiled spring 34.
  • the body 10 is formed with a pump port 38, as well as a hydraulic oil feed passage 40 communicating with the pump port 38. Also, the body 10 is provided at a portion thereof below each of the spools 22 with an output port 42 communicating with an actuator (not shown).
  • Fig. 1 only two push rods 14 and the construction associated therewith are shown, however, the other two push rods (not shown) are constructed in the same manner.
  • FIG. 2 A conventional input apparatus of another type is shown in Fig. 2, which is constructed in the form of a pilot valve used for various industrial equipments.
  • the input apparatus of Fig. 2 includes a body 100, which is formed therein with four chambers 102 as in the apparatus shown in Fig. 1, although Fig. 2 shows only two such chambers.
  • the chambers 102 each are continuously formed at a lower portion thereof with a passage 104 and an output port 106 in a manner to communicate with each other.
  • a shaft member 108 In the chamber 102 is arranged a shaft member 108 in a manner to vertically movable therein.
  • the shaft member 108 is fittedly provided on an outer periphery of an upper end thereof with a support member 110 and on an outer periphery of a lower end thereof with a support member 112, and between both support members 110 and 112 is interposedly arranged a coiled spring 114 acting as a part of elastic means.
  • the chamber 102 is provided therein a further support member 116 in a manner to be positioned below the support member 112, and between the support member 116 and a lower end or bottom of the chamber 102 is arranged a compression spring 118 in the form of a coiled spring so as to serve as another part of the elastic means.
  • the remaining three chambers are constructed in the same manner.
  • the input apparatus also includes a push rod 120 vertically movably arranged above each of the shaft members 108.
  • a push rod 120 vertically movably arranged above each of the shaft members 108.
  • Above the four push rods 120 is commonly arranged a press member 122 acting as a part of a control section, and to the press member 122 is operatively connected a lever 124 acting as another part of the control section.
  • the push rods 120, the press member 122 and a lower portion of the lever 124 are surrounded with a bellows-like cover 126.
  • each of the passages 104 is arranged a shuttle 128 in a manner to be vertically slidable therein.
  • the shuttle 128 is provided on a side wall thereof with a pair of upper and lower passages 130 and 132 in a manner to laterally extend and be vertically spaced from each other and also provided therein with a vertically extending passage 134 so as to communicate with the lateral passages 130 and 132.
  • the vertical passage 134 is arranged so as to communicate with the output port 106.
  • the body 100 is formed therein with a pump passage 136, to which a hydraulic pump 138 is connected.
  • the body 100 is also formed therein with a tank passage 140, to which a tank 142 is connected.
  • Fig. 3 shows a circuit of the input apparatus or pilot valve thus constructed.
  • a back pressure from the side of the output port 106 acts on a pressure receiving surface 144 which is a lower end surface of the shuttle 128, so that the back pressure and elastic force of the coiled compression springs 114 and 118 are balanced with each other to control a position of the shuttle 128 and therefore hydraulic oil discharged from the output port 106.
  • the shuttle 128 is pushed down to a position at which the passage 132 of the shuttle 128 communicates with the tank passage 140, resulting in hydraulic oil being returned through the passages 132 and 140 to the tank 142.
  • the conventional input apparatus or pilot valve constructed as described above is adapted to output hydraulic pressure of a predetermined level depending on the amount of operation of the lever 124 to the output port 106.
  • the input apparatus completely fails to control its output by means of an external signal such as a hydraulic signal output from a different or external hydraulic control system or the like, to thereby fail to operate in association with the external hydraulic control system.
  • an external signal such as a hydraulic signal output from a different or external hydraulic control system or the like
  • the present invention has been made in view of the foregoing disadvantages of the prior art.
  • an object of the present invention to provide an input apparatus which is capable of concurrently outputting both a hydraulic signal and an electrical signal.
  • an input apparatus which comprises a control section, a body, a plurality of sets of push rods arranged in the body in a manner to correspond to a plurality of actuators and commonly operatively connected to the control section, the sets each comprising two push rods, a block and elastic means arranged in the body and operatively connected to each of the push rods, a spool arranged in the body and operatively connected through the block and elastic means to each of the push rods, the body being formed therein with a hydraulic oil feed passage, the spool being formed with a passage, whereby the control section is pressedly operated to force each of the spools through the push rod, block and elastic means to permit the hydraulic oil feed passage of the body and the passage of the spool to communicate with each other to feed the actuator with hydraulic oil and balance force generated due to flowing of hydraulic oil and acting to forcedly return the spool with elastic force of the elastic means to position the spool depending on the amount of operation of the control
  • an input apparatus which comprises a control section, a body formed with a pump passage and an output port, push rods arranged in the body and operatively connected to the control section, elastic means arranged in the body and operatively connected to each of the push rods, a shuttle arranged in the body and operatively connected to each of the push rods, the shuttle having a pressure receiving surface and being formed with a passage, whereby pressing operation of the control section causes the shuttle to be moved through the push rod in one direction against the elastic means to permit the passage of the shuttle with the pump passage of the body, resulting in feeding hydraulic oil from a hydraulic pump through the shuttle to the output port of the body and balancing a back pressure acting on the pressure receiving surface of the shuttle through the output port and elastic force of the elastic means with each other to determine a position of the shuttle and therefore a hydraulic pressure output through the output port depending on the amount of operation of the control section.
  • the input apparatus is featured in that it further comprises a pilot section for exerting force which permits the
  • Fig. 4 shows an embodiment of an input apparatus according to the present invention.
  • An input apparatus shown in Fig. 4 is adapted to eliminate the disadvantage encountered with the conventional input apparatus described above with reference to Fig. 1. Therefore, reference numerals like those in Fig. 1 are used in Fig. 4 to indicate parts corresponding to the parts shown in Fig. 1.
  • the input apparatus of the illustrated embodiment includes four blocks 18 arranged in substantially the same manner as in the prior art shown in Fig. 1.
  • the blocks 18 each are formed on an outer surface thereof with an annular recess or groove 46 so as to extend in a circumferential direction thereof.
  • an electrical load sensor 48 In the groove 46 is arranged an electrical load sensor 48.
  • a load cell utilizing a strain gage may be used for the load sensor 48.
  • a signal generated from the load sensor 48 is output through a signal cable 50 and used to electrically control another equipment. More particularly, the load sensor 48 detects a load value corresponding to the amount of operation of a control lever 12, to thereby generate an output signal corresponding thereto.
  • the load sensor 48 is arranged on each of the blocks 18. However, it may be arranged on each of the push rods 14.
  • the remaining part of the input apparatus of the illustrated embodiment may be constructed in substantially the same manner as the conventional input apparatus shown in Fig. 1.
  • a basic construction of the input apparatus is hydraulic and a plurality of actuators are actuated by means of the single control section or control lever 12. More specifically, operation of the control lever 12 operated in a desired amount in a desired direction permits any desired set of push rods 14 to be downward pressed, so that each of spools 22 corresponding to the push rods 14 is forcedly downward pressed through the block 18 and elastic members or coiled springs 32 and 34. This results in a passage 24 formed in the spool 22 communicating with a hydraulic oil feed passage 40 formed in a body 10, so that hydraulic oil may be fed to an actuator (not shown).
  • the electrical load sensor 48 mounted on the push rod 14 or block 18 concurrently generates an electrical signal depending on the amount of operation of the control lever 12, which is then used for electrically controlling a different equipment.
  • the input apparatus of the illustrated embodiment exhibits a function as an electrical input apparatus while exhibiting advantages of a hydraulic input apparatus.
  • the illustrated embodiment provides a desired input apparatus without substantially varying the conventional input apparatus and more specifically without varying a size of the prior art, its configuration and the like, so that it may be conveniently combined with different equipments.
  • the input apparatus of the illustrated embodiment simultaneously generates both a hydraulic signal and an electrical signal through operation of the single control lever, of which output values are determined depending on the amount of operation of the single control lever.
  • Fig. 5 shows another embodiment of an input apparatus according to the present invention, which is constructed in the form of a pilot valve.
  • An input apparatus of the illustrated embodiment is adapted to eliminate disadvantages encountered with the conventional input apparatus described with reference to Figs. 2 and 3. Therefore, reference numerals like those in Fig. 2 are used in Fig. 5 to indicate parts corresponding to the parts shown in Fig. 2.
  • a shuttle 128 is formed on an outer surface of a lower portion thereof into a reduced diameter, resulting in being provided with a step which serves as another pressure receiving surface 146.
  • a body 100 is formed therein with an external hydraulic signal passage 148 acting as a pilot section, to which an external hydraulic signal is selectively input from a different or external hydraulic control system or the like.
  • the remaining part of the illustrated embodiment may be constructed in substantially the same manner as the conventional input apparatus or pilot valve shown in Fig. 2.
  • a hydraulic control operation may be carried out in the same manner as the prior art described above. Operation of a control section or control lever 124 causes the shuttle 128 to be moved through the corresponding push rod 120 and shaft member 108 in one direction. This results in a passage 132 of the shuttle 128 and a pump passage 136 of the body 100 communicating with each other, so that hydraulic oil from a hydraulic pump 138 is fed through the shuttle 128 to an output port 106 of the body 100.
  • a back pressure acts on a pressure receiving surface 144 of the shuttle 128 through the output port 106, so that the back pressure and elastic force of elastic means 114 and 118 are balanced with each other to determine a position of the shuttle 128 and therefore hydraulic pressure output through the output port 106 depending on the amount of operation of the control lever 124.
  • FIG. 6 a modification of the input apparatus shown in Fig. 5 is illustrated.
  • An input apparatus shown in Fig. 6 is constructed in substantially the same manner as the embodiment of Fig. 5, except arrangement of passages in a body and that of a shuttle. More particularly, a shuttle 128 is formed on an outer periphery thereof with an upper passage 150 and a lower passage 152 vertically spaced from one another. A body 100 is formed therein with a pump passage 154 and a passage 156.
  • a relationship is established between the passages 150 and 152 of the shuttle 128 and the passages 154 and 156 of the body 100 so that during normal operation, lowering of the shuttle 128 causes the pump passage 154 and passage 156 to communicate with each other through the upper passage 150 to permit hydraulic oil to be fed from a hydraulic pump 138 (Fig. 5).
  • an external hydraulic signal acts on a pressure receiving surface 158 of the shuttle 128 from a different or external hydraulic control system (not shown) or the like through an external hydraulic signal passage 160
  • the shuttle 128 is upward moved correspondingly to decrease feeding of hydraulic oil through the passage 150.
  • the modification likewise permits hydraulic oil fed through an output port 106 to be controlled by means of an external hydraulic signal fed through the external hydraulic signal passage 160.
  • the remaining part of the modification may be constructed in substantially the same manner as the embodiment of Fig. 5.
  • Fig. 7 shows another modification of the embodiment shown in Fig. 5.
  • the input apparatus or pilot vale shown in each of Figs. 5 and 6 is so constructed that the external hydraulic signal passage 148 acting as the pilot section is fed with an external hydraulic signal from a different hydraulic control system the like.
  • the modification of Fig. 7 is constructed in such a manner that a shuttle 128 is integrally provided at a lower portion thereof with a core 162 and a solenoid 164 is arranged so as to surround the core 162.
  • the solenoid 164 is mounted on a body 100.
  • the input apparatus of the embodiment shown in Figs. 5 to 7 is actuated by means of an external signal fed thereto through the pilot section in addition to by operation of its own control section, to thereby exhibit an additional function.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • General Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Servomotors (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
EP19920303846 1992-04-29 1992-04-29 Dispositif d'entrée Expired - Lifetime EP0567698B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US07/875,642 US5251534A (en) 1992-04-29 1992-04-29 Input apparatus
DE1992622843 DE69222843T2 (de) 1992-04-29 1992-04-29 Eingangsglied
EP19920303846 EP0567698B1 (fr) 1992-04-29 1992-04-29 Dispositif d'entrée
US07/991,567 US5348049A (en) 1992-04-29 1992-12-16 Input apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19920303846 EP0567698B1 (fr) 1992-04-29 1992-04-29 Dispositif d'entrée

Publications (2)

Publication Number Publication Date
EP0567698A1 true EP0567698A1 (fr) 1993-11-03
EP0567698B1 EP0567698B1 (fr) 1997-10-22

Family

ID=8211351

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920303846 Expired - Lifetime EP0567698B1 (fr) 1992-04-29 1992-04-29 Dispositif d'entrée

Country Status (2)

Country Link
EP (1) EP0567698B1 (fr)
DE (1) DE69222843T2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709166A1 (fr) * 1993-08-17 1995-02-24 Kubota Kk Soupape pilote hydraulique.
CN100419277C (zh) * 2003-07-11 2008-09-17 博世力士乐Dsi公司 用于重型建筑机械的具有随动推杆的远程控制器
WO2012093240A1 (fr) * 2011-01-07 2012-07-12 Bosch Rexroth D.S.I. Dispositif de régulation de pression avec détection de la position neutre
EP2716919A4 (fr) * 2011-05-25 2015-05-06 Kobelco Constr Mach Co Ltd Machine de travail rotative
JP2015175174A (ja) * 2014-03-17 2015-10-05 川崎重工業株式会社 操作装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2030048A1 (de) * 1970-06-12 1971-11-04 Askania Gmbh Steuervorrichtung mit einem nach Art eines Steuerknüppels ausgebildeten verschwenkbaren Hand-Betätigungsglied
GB2101721A (en) * 1981-07-06 1983-01-19 Dana Corp Joystick control means
DE3216659A1 (de) * 1981-07-09 1983-01-27 Fiat Allis Europe S.p.A., 73014 Lecce Handbetaetigbare hydrauliksteuervorrichtung mit hydraulischer lagesperre
EP0117806A1 (fr) * 1983-02-15 1984-09-05 Rexroth-Sigma Dispositif distributeur de fluide, notamment pour télécommande
DE8508774U1 (de) * 1985-03-23 1985-06-13 KLB Hydrosystem GmbH, 4040 Neuss Hydraulischer Steuerdruckgeber
GB2211280A (en) * 1987-10-16 1989-06-28 Daco Scient Limited Joystick
EP0383560A1 (fr) * 1989-02-14 1990-08-22 Kabushiki Kaisha Kobe Seiko Sho Méthode et dispositif de commande pour machine de construction
EP0447334A1 (fr) * 1990-03-15 1991-09-18 SEXTANT Avionique Manipulateur à jauges de contrainte

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2030048A1 (de) * 1970-06-12 1971-11-04 Askania Gmbh Steuervorrichtung mit einem nach Art eines Steuerknüppels ausgebildeten verschwenkbaren Hand-Betätigungsglied
GB2101721A (en) * 1981-07-06 1983-01-19 Dana Corp Joystick control means
DE3216659A1 (de) * 1981-07-09 1983-01-27 Fiat Allis Europe S.p.A., 73014 Lecce Handbetaetigbare hydrauliksteuervorrichtung mit hydraulischer lagesperre
EP0117806A1 (fr) * 1983-02-15 1984-09-05 Rexroth-Sigma Dispositif distributeur de fluide, notamment pour télécommande
DE8508774U1 (de) * 1985-03-23 1985-06-13 KLB Hydrosystem GmbH, 4040 Neuss Hydraulischer Steuerdruckgeber
GB2211280A (en) * 1987-10-16 1989-06-28 Daco Scient Limited Joystick
EP0383560A1 (fr) * 1989-02-14 1990-08-22 Kabushiki Kaisha Kobe Seiko Sho Méthode et dispositif de commande pour machine de construction
EP0447334A1 (fr) * 1990-03-15 1991-09-18 SEXTANT Avionique Manipulateur à jauges de contrainte

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709166A1 (fr) * 1993-08-17 1995-02-24 Kubota Kk Soupape pilote hydraulique.
CN100419277C (zh) * 2003-07-11 2008-09-17 博世力士乐Dsi公司 用于重型建筑机械的具有随动推杆的远程控制器
WO2012093240A1 (fr) * 2011-01-07 2012-07-12 Bosch Rexroth D.S.I. Dispositif de régulation de pression avec détection de la position neutre
FR2970350A1 (fr) * 2011-01-07 2012-07-13 Bosch Rexroth Dsi Sas Dispositif de regulation de pression avec detection de la position neutre
CN103299090A (zh) * 2011-01-07 2013-09-11 博世力士乐Dsi公司 具有中性位置探测的压力调节装置
CN103299090B (zh) * 2011-01-07 2016-08-24 博世力士乐Dsi公司 具有中性位置探测的压力调节装置
EP2716919A4 (fr) * 2011-05-25 2015-05-06 Kobelco Constr Mach Co Ltd Machine de travail rotative
US9624647B2 (en) 2011-05-25 2017-04-18 Kobelco Construction Machinery Co., Ltd. Slewing-type working machine
JP2015175174A (ja) * 2014-03-17 2015-10-05 川崎重工業株式会社 操作装置

Also Published As

Publication number Publication date
DE69222843D1 (de) 1997-11-27
DE69222843T2 (de) 1998-02-19
EP0567698B1 (fr) 1997-10-22

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