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WO2016204321A1 - Appareil de commande d'oscillation destiné à un équipement de construction et son procédé de commande - Google Patents

Appareil de commande d'oscillation destiné à un équipement de construction et son procédé de commande Download PDF

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Publication number
WO2016204321A1
WO2016204321A1 PCT/KR2015/006087 KR2015006087W WO2016204321A1 WO 2016204321 A1 WO2016204321 A1 WO 2016204321A1 KR 2015006087 W KR2015006087 W KR 2015006087W WO 2016204321 A1 WO2016204321 A1 WO 2016204321A1
Authority
WO
WIPO (PCT)
Prior art keywords
swing
turning
hydraulic
brake
pressure
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.)
Ceased
Application number
PCT/KR2015/006087
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English (en)
Korean (ko)
Inventor
박형석
안횡환
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.)
Volvo Construction Equipment AB
Original Assignee
Volvo Construction Equipment AB
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 Volvo Construction Equipment AB filed Critical Volvo Construction Equipment AB
Priority to PCT/KR2015/006087 priority Critical patent/WO2016204321A1/fr
Publication of WO2016204321A1 publication Critical patent/WO2016204321A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • 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
    • 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
    • E02F9/22—Hydraulic or pneumatic drives

Definitions

  • the present invention relates to a swing control device, and more specifically, to a swing control device for a construction machine for controlling hydraulic oil supplied from a hydraulic pump to a swing hydraulic motor for swinging an upper swing structure, and a control method thereof. will be.
  • FIG. 1 is a hydraulic circuit diagram of a swing control device for a construction machine according to the prior art.
  • a variable displacement hydraulic pump 1 (hereinafter referred to as "hydraulic pump") and a pilot pump 2 are connected to an engine or the like.
  • the turning hydraulic motor 3 which is driven in the forward and reverse directions by the hydraulic oil supplied from the hydraulic pump 1 is connected to the hydraulic pump 1 through the supply passages 4 and 5.
  • An upper swing structure (not shown) pivoting in the forward or reverse direction according to the driving direction of the swing hydraulic motor 3 is pivotally connected to the swing hydraulic motor 3.
  • a turning brake 6 (referred to as a parking brake) is connected to the pilot pump 2, which is switched by the hydraulic oil supplied from the pilot pump 2 and controls the turning and stopping of the upper swing body.
  • the turning control valve 7 for controlling the hydraulic oil flow direction supplied to the turning hydraulic motor 3 at the time of switching by the application of the pilot pressure is provided with the hydraulic pump 1 and the turning hydraulic motor 3. It is installed in the flow path between.
  • a swing operation lever 8 for inputting a pilot pressure corresponding to the manipulated variable to the swing control valve 7 is provided in a flow path between the pilot pump 2 and the swing control valve 7.
  • the time delay valve 11 is installed in the flow path between the pilot pump 2 and the swing brake 6, and the hydraulic fluid of the pilot pump 2 when switching by applying the pilot pressure to the swing brake 6 Of the brake switching valve 11a and the hydraulic hydraulic motor 3 for turning the brake 6 to release the hydraulic fluid from the swing brake 6 when the pilot pressure is interrupted. It may be provided with an orifice (not shown) provided in the flow path between the brake switching valve (11a) and the hydraulic motor for swing (3) to delay the braking time of the swing brake (6) when stopped.
  • the pilot pressure applied to the brake switching valve 11a is a first pressure for selecting a relatively high pressure among the pilot pressures applied to the left and right hydraulic pressure ports of the swing control valve 7 from the swing operation lever 8.
  • the pilot pressure from the shuttle valve 13 and the pilot pressure applied to drive the work equipment (referred to as boom, arm, etc.) (e.g., the pilot pressure to drive arm-in).
  • the pilot pressure applied from the second shuttle valve 14 to select a relatively high pressure can be used.
  • the spool of the brake switching valve 11a is operated by a pilot pressure applied through the second shuttle valve 14. In this figure, it is switched downward.
  • the operating oil lever of the hydraulic pump 1 is supplied to the swing hydraulic motor 3 through the supply passage 4 to rotate the upper swing structure.
  • the pressure in the supply passage 4 drops (refer to graph curve "a"), and is decelerated by the pressure formed in the supply passage 5 (refers to graph curve "b").
  • the turning brake 6 is operated.
  • the turning hydraulic motor 3 is maintained in a rotational state for a predetermined time by the inertia rotational force of the upper swinging body, and is decelerated by the braking effect due to the hydraulic reaction of the turning hydraulic motor 3.
  • the upper swing body can be stopped by the braking force of the swing brake 6.
  • the hydraulic oil of the hydraulic pump 1 is supplied to the swing hydraulic motor 3 through the supply flow passage 4 to turn the upper swing structure while turning the upper swing structure.
  • the hydraulic oil of the hydraulic pump 1 may be supplied to the turning hydraulic motor 3 through the supply passage 5.
  • the hydraulic oil of the hydraulic pump 1 can be supplied to the turning hydraulic motor 3 through the supply passage 5 from the moment when the rotational inertia force of the upper swing member disappears. Therefore, the hydraulic oil of the hydraulic pump 1 is supplied to the turning hydraulic motor 3 in the inverting operation direction of the turning operation lever 8 so that the upper turning body can be reversed.
  • the present invention is to solve the above problems, for construction machinery that can stop the upper swing immediately due to the braking of the swing brake when the swing operation lever is placed in the neutral position during the turning of the upper swing on the slope.
  • An object of the present invention is to provide a swing control device and a control method thereof.
  • the present invention also relates to a swing control device for a construction machine which can prevent the hydraulic oil supplied from the hydraulic pump to the swing hydraulic motor from being drained to the hydraulic oil tank when the swing reverse operation is performed during the swing of the upper swing structure. It is an object to provide a control method.
  • a turning hydraulic motor driven in a forward and a reverse direction by operating oil supplied from the hydraulic pump through a supply passage;
  • An upper swing structure pivotally connected to the swing hydraulic motor
  • a turning brake for controlling turning and stopping of the upper swing body
  • a swing control valve installed in a flow path between the hydraulic pump and the swing hydraulic motor and controlling a flow direction of the hydraulic oil supplied to the swing hydraulic motor during switching;
  • First and second pressure sensors for sensing a pressure generated in the supply passage
  • a time delay valve installed in a flow path between the pilot pump and the swing brake and delaying a braking time of the swing brake when the swing hydraulic motor is stopped;
  • the upper swing structure When the swing operation lever is positioned in the neutral position during the turning of the upper swing structure, the upper swing structure is detected when the pressure of the one side supply flow path detected by the first and second pressure sensors is relatively higher than the pressure of the other side flow flow path.
  • a swing control device for a construction machine characterized in that it comprises a; controller for shutting off the hydraulic oil supplied to the swing brake from the pilot pump to stop immediately.
  • a turning hydraulic motor driven in a forward and a reverse direction by operating oil supplied from the hydraulic pump through a supply passage;
  • An upper swing structure pivotally connected to the swing hydraulic motor
  • a turning brake for controlling turning and stopping of the upper swing body
  • a swing control valve installed in a flow path between the hydraulic pump and the swing hydraulic motor and controlling a flow direction of the hydraulic oil supplied to the swing hydraulic motor during switching;
  • First and second pressure sensors for sensing a pressure generated in the supply passage
  • a control valve installed in a flow path between the pilot pump and the swing brake and supplying hydraulic oil of the pilot pump to the swing brake during switching to release braking of the swing brake;
  • the upper swing structure When the swing operation lever is positioned in the neutral position during the turning of the upper swing structure, the upper swing structure is detected when the pressure of the one side supply flow path detected by the first and second pressure sensors is relatively higher than the pressure of the other side flow flow path. And a controller for applying an electrical signal to the control valve so as to shut off the hydraulic oil supplied from the pilot pump to the swing brake in order to immediately stop the engine.
  • a turning hydraulic motor driven by operating oil supplied from the hydraulic pump through a supply passage
  • An upper swing structure pivotally connected to the swing hydraulic motor
  • a turning brake for controlling turning and stopping of the upper swing body
  • a swing control valve for controlling the flow direction of the hydraulic oil supplied to the swing hydraulic motor during switching
  • First and second pressure sensors for sensing a pressure generated in the supply passage
  • a control method of a turning control device for a construction machine comprising: a controller for inputting a detection signal from the first and second pressure sensors;
  • the upper brake body is immediately stopped by braking the swing brake immediately so that Safety can be secured by preventing spills.
  • FIG. 1 is a hydraulic circuit diagram of a swing control device for a construction machine according to the prior art
  • FIG. 2 is a hydraulic circuit diagram of a turning control device for a construction machine according to an embodiment of the present invention
  • FIG. 3 is a hydraulic circuit diagram of a swing control device for a construction machine according to another embodiment of the present invention.
  • Figure 4 (a, b) is a graph showing a change in the pressure of the swing motor during the reverse operation of the swing device in the swing control device for construction machinery according to an embodiment of the present invention
  • FIG. 5 is a flowchart illustrating a control method of a turning control device for a construction machine according to an exemplary embodiment of the present invention.
  • FIG. 2 is a hydraulic circuit diagram of a swing control device for a construction machine according to an embodiment of the present invention
  • Figure 3 is a hydraulic circuit diagram of a swing control device for a construction machine according to another embodiment of the present invention
  • Figure 4 (a, b ) Is a graph showing a change in the pressure of the swing motor during the inversion operation of the swing device in the swing control device for construction machinery according to an embodiment of the present invention
  • Figure 5 is a swing control device for construction machinery according to an embodiment of the present invention It is a flowchart which shows the control method of.
  • variable displacement hydraulic pump 1 (hereinafter referred to as "hydraulic pump") and the pilot pump 2 are connected to an engine or the like.
  • the turning hydraulic motor 3 which is driven in the forward and reverse directions by the hydraulic oil supplied from the hydraulic pump 1 is connected to the hydraulic pump 1 through the supply passages 4 and 5.
  • An upper swing structure (not shown) pivoting in the forward or reverse direction according to the driving direction of the swing hydraulic motor 3 is pivotally connected to the swing hydraulic motor 3.
  • a turning brake 6 (called a parking brake), which is switched by the hydraulic oil supplied from the pilot pump 2 and controls the turning and stopping of the upper swinging body, is connected to the pilot pump 2.
  • the turning control valve 7 for controlling the hydraulic oil flow direction supplied to the turning hydraulic motor 3 at the time of switching by the application of the pilot pressure is provided with the hydraulic pump 1 and the turning hydraulic motor 3. It is installed in the flow path between.
  • a swing operation lever 8 for inputting a pilot pressure corresponding to the manipulated variable to the swing control valve 7 is provided in a flow path between the pilot pump 2 and the swing control valve 7.
  • the time delay valve 11 is installed in the flow path between the pilot pump 2 and the swing brake 6, and the hydraulic fluid of the pilot pump 2 when switching by applying the pilot pressure to the swing brake 6 Is supplied to the brake to release the brake, and when the pilot pressure is shut off, the brake switching valve 11a for braking the swing brake 6 by discharging the hydraulic oil from the swing brake 6 and when the swing hydraulic motor 3 stops.
  • An orifice (not shown) may be provided in a flow path between the brake change valve 11a and the hydraulic motor 3 for swing to delay the braking time of the swing brake 6.
  • the pilot pressure applied to the brake switching valve 11a is a first pressure for selecting a relatively high pressure among the pilot pressures applied to the left and right hydraulic pressure ports of the swing control valve 7 from the swing operation lever 8.
  • the pilot pressure from the shuttle valve 13 and the pilot pressure applied to drive the work equipment (referred to as boom, arm, etc.) (e.g., the pilot pressure to drive arm-in).
  • the pilot pressure applied from the second shuttle valve 14 to select a relatively high pressure can be used.
  • the operating oil of the hydraulic pump 1 is supplied to the swing hydraulic motor 3 through the supply passage 4 so that the swing operating lever 8 is positioned in the middle while the upper swing structure is turned.
  • the pressure of one supply passage referring to 4 as an example
  • the brake switching valve When operating the swing operation lever 8 to drive the swing hydraulic motor 3 to swing the upper swing structure, the brake switching valve receives a pilot pressure applied through the second shuttle valve 14. As applied to 11a, the spool of the brake switching valve 11a is switched downward in the drawing. Therefore, since the hydraulic oil of the pilot pump 2 is supplied to the swing brake 6 via the brake switch valve 11a, the braking state of the swing brake 6 is released.
  • the spool of the swing control valve 7 can be switched left or right by the pilot pressure applied from the pilot pump 2 by the swing operation lever 8.
  • the upper swing structure while supplying the hydraulic oil of the hydraulic pump 1 to the swing hydraulic motor 3 through the supply flow passage 4 to rotate the upper swing structure due to the rotation of the swing hydraulic motor 3.
  • the turning operation lever 8 is reversed.
  • the hydraulic oil of the hydraulic pump 1 is supplied to the swing hydraulic motor 3 along the supply passage 5 via the swing control valve 7.
  • the pressure generated in the supply passages 4 and 5 is detected by the first and second pressure sensors 9 and 10, and the detected detection signal is input to the controller 12.
  • the swing brake 6 can be immediately braked to immediately stop the upper swing body.
  • a variable displacement hydraulic pump 1 (hereinafter referred to as a hydraulic pump) and a pilot pump 2 are connected to an engine or the like.
  • the turning hydraulic motor 3 which is driven in the forward and reverse directions by the hydraulic oil supplied from the hydraulic pump 1 is connected to the hydraulic pump 1 through the supply passages 4 and 5.
  • An upper swing structure (not shown) pivoting in the forward or reverse direction according to the driving direction of the swing hydraulic motor 3 is pivotally connected to the swing hydraulic motor 3.
  • a turning brake 6 (called a parking brake), which is switched by the hydraulic oil supplied from the pilot pump 2 and controls the turning and stopping of the upper swinging body, is connected to the pilot pump 2.
  • the turning control valve 7 for controlling the hydraulic oil flow direction supplied to the turning hydraulic motor 3 at the time of switching by the application of the pilot pressure is provided with the hydraulic pump 1 and the turning hydraulic motor 3. It is installed in the flow path between.
  • a swing operation lever 8 for inputting a pilot pressure corresponding to the manipulated variable to the swing control valve 7 is provided in a flow path between the pilot pump 2 and the swing control valve 7.
  • a control valve 15 for supplying hydraulic oil of the pilot pump 2 to the swing brake 6 to release braking of the swing brake 6 is provided between the pilot pump 2 and the swing brake 6. Is installed in the flow path.
  • the swing operation lever 8 When the swing operation lever 8 (RCV) is placed in the neutral position during the turning of the upper swing structure on the inclined ground, the pressure of the one side supply flow passage 4 or 5 detected by the first and second pressure sensors 9 and 10. When it is relatively higher than the pressure of the other side supply passage 5 or 4, the pivoting brake 6 is supplied to the pivoting brake 6 from the pilot pump 2 to stop the upper pivotal body immediately.
  • a controller 12 for applying an electrical signal to the control valve 15 to shut off the hydraulic oil is connected to the first and second pressure sensors 9 and 10.
  • the control valve 15 is
  • An initial state installed in a flow path between the pilot pump 2 and the swing brake 6, for discharging hydraulic oil from the swing brake 6 to stop the upper swing body, and an electrical signal from the controller 12;
  • a solenoid valve that is switched to the ON state to release the braking of the swing brake 6 upon application of may be used.
  • the configuration of the first and second pressure sensors 9 and 10 for sensing the pressure of the hydraulic oil generated in the controller 12 and inputting a detection signal to the controller 12 is configured according to an embodiment of the present invention shown in FIG. 2. Since it is the same as the detailed description thereof will be omitted, the same reference numerals.
  • the turning operation lever 8 is supplied while the hydraulic oil of the hydraulic pump 1 is supplied to the turning hydraulic motor 3 through the supply passage 4 on the inclined ground to turn the upper swing body.
  • the pressure formed in the supply passages 4 and 5 is sensed by the first and second pressure sensors 9 and 10 and a detection signal is input to the controller 12.
  • the spool When the pressure generated in the supply passage 4 exceeds a set value, the spool is switched by the electrical signal applied from the controller 12 to the control valve 15, thereby reducing the Hydraulic oil is passed through the control valve 15 to drain the hydraulic oil tank (T).
  • the upper swing body can be stopped immediately by braking of the swing brake 6 on an incline.
  • the swing operation lever 8 when the swing operation lever 8 is placed in the neutral position during the swing of the upper swing structure on the inclined ground, the pressure generated in the supply passages 4 and 5 of the swing hydraulic motor 3 is sensed.
  • the swing brake 6 can be braked immediately to prevent the upper swing body from flowing down in the gravity direction.
  • the braking delay time of the turning brake 6 is adjusted by an electric signal when the turning hydraulic motor 3 is stopped, a separate time delay valve is unnecessary, thereby simplifying the hydraulic line (time delay shown in FIG. 1).
  • the valve 11 and the first and second shuttle valves 13 and 14 are unnecessary, and the hydraulic line for installing the time delay valve 11 between the swing brake 6 and the second shuttle valve 14 is unnecessary. Is possible).
  • An upper swing structure (not shown) pivotably connected to the swing hydraulic motor (3);
  • a turning brake 6 (referring to a parking brake) for controlling the turning and stopping of the upper swing body
  • a swing operating lever 8 for outputting a pilot pressure corresponding to the manipulated variable
  • a swing control valve for controlling the flow direction of the hydraulic oil supplied to the swing hydraulic motor (3) when switching by application of pilot pressure by operation of the swing operation lever (8);
  • First and second pressure sensors 9 and 10 for detecting pressure generated in the supply passages 4 and 5;
  • the swing control device for a construction machine comprising: a controller (12) for inputting a detection signal from the first and second pressure sensors (9, 10):
  • the turning inversion operation signal is ignored when the pressure value of the inverting side supply flow passage 5 is equal to or greater than a set value. And moving to a previous step (S20) for comparing the magnitude of the pressure value sensed in the inverting side supply passage 5 of the hydraulic motor 3 with the set value (S40).
  • the turning brake 6 is braked immediately (S60A), and the pressure of the pressurization side supply passage 4 is applied.
  • the value is smaller than the pressure value of the inverting side supply passage 5, it may comprise the step (S60B) of braking the swing brake 6 after a predetermined time.
  • the upper swing structure when switching the spool of the swing control valve 7 by the operation of the swing operation lever 8, the hydraulic oil of the hydraulic pump (1) and the swing control valve (7) and As the upper flow passage 4 passes through the supply hydraulic motor 3, the upper swing structure can be rotated in the forward or reverse direction.
  • the swing is provided by a pressure sensor installed in a flow path between the swing operating lever 8 and the swing control valve 7 and sensing a pilot pressure applied to the swing control valve 7. The presence or absence of the operation lever 8 can be sensed.
  • the pressure value of the swing inversion side supply flow passage 5 is equal to or less than the set pressure value.
  • the upper swing structure is pivoted in the direction by the operation of the swing operation lever 8.
  • the swing brake when the swing operation lever is placed in the neutral position during the swing of the upper swing structure such as an excavator on the slope, the swing brake can be braked immediately to prevent the upper swing body from flowing down in the gravity direction. It works.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

L'invention concerne un appareil de commande d'oscillation destiné à un équipement de construction, pour réguler un fluide hydraulique qui est fourni par une pompe hydraulique à un moteur d'oscillation hydraulique de manière à osciller un corps d'oscillation supérieur. L'appareil de commande d'oscillation pour un équipement de construction selon un mode de réalisation de la présente invention comprend : un moteur d'oscillation hydraulique entraîné par un fluide hydraulique fourni par une pompe hydraulique à travers un passage d'alimentation en fluide ; un corps d'oscillation supérieur relié de manière oscillante au moteur d'oscillation hydraulique ; un frein d'oscillation pour commander l'oscillation et l'arrêt du corps d'oscillation supérieur ; une soupape de commande d'oscillation pour commander, lors d'une commutation, la direction d'écoulement du fluide hydraulique fourni au moteur d'oscillation hydraulique ; une soupape de retard pour retarder le temps de freinage du frein d'oscillation lors de l'arrêt du moteur d'oscillation hydraulique ; et un dispositif de commande pour empêcher le fluide hydraulique d'être fourni par une pompe pilote au frein d'oscillation, de manière à arrêter immédiatement le corps d'oscillation supérieur lorsque, pendant l'oscillation du corps d'oscillation supérieur, un levier d'actionnement d'oscillation est placé dans la position neutre et la pression dans un passage d'alimentation en fluide sur un côté est plus élevée que la pression dans un passage d'alimentation en fluide sur l'autre côté, les pressions étant détectées par des premier et second capteurs de pression.
PCT/KR2015/006087 2015-06-16 2015-06-16 Appareil de commande d'oscillation destiné à un équipement de construction et son procédé de commande Ceased WO2016204321A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2015/006087 WO2016204321A1 (fr) 2015-06-16 2015-06-16 Appareil de commande d'oscillation destiné à un équipement de construction et son procédé de commande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2015/006087 WO2016204321A1 (fr) 2015-06-16 2015-06-16 Appareil de commande d'oscillation destiné à un équipement de construction et son procédé de commande

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WO2016204321A1 true WO2016204321A1 (fr) 2016-12-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106869223A (zh) * 2017-02-15 2017-06-20 广西柳工机械股份有限公司 挖掘机正流量液压系统的控制方法
CN107905287A (zh) * 2017-10-24 2018-04-13 柳州柳工挖掘机有限公司 挖掘机发动机启停控制系统及控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011078587A2 (fr) * 2009-12-24 2011-06-30 두산인프라코어 주식회사 Appareil de commande d'un frein de pivotement pour engin de chantier
WO2012015087A1 (fr) * 2010-07-30 2012-02-02 볼보 컨스트럭션 이큅먼트 에이비 Système de commande d'écoulement tourbillonnaire pour équipement de construction et procédé de commande de ce système
WO2012091192A1 (fr) * 2010-12-28 2012-07-05 볼보 컨스트럭션 이큅먼트 에이비 Procédé pour commander le débit d'une pompe hydraulique à capacité variable pour un engin de chantier
WO2015012423A1 (fr) * 2013-07-24 2015-01-29 볼보 컨스트럭션 이큅먼트 에이비 Circuit hydraulique pour engin de chantier
WO2015046901A1 (fr) * 2013-09-26 2015-04-02 두산인프라코어 주식회사 Appareil de commande de moteur de pivotement utilisant un frein de pivotement et procédé associé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011078587A2 (fr) * 2009-12-24 2011-06-30 두산인프라코어 주식회사 Appareil de commande d'un frein de pivotement pour engin de chantier
WO2012015087A1 (fr) * 2010-07-30 2012-02-02 볼보 컨스트럭션 이큅먼트 에이비 Système de commande d'écoulement tourbillonnaire pour équipement de construction et procédé de commande de ce système
WO2012091192A1 (fr) * 2010-12-28 2012-07-05 볼보 컨스트럭션 이큅먼트 에이비 Procédé pour commander le débit d'une pompe hydraulique à capacité variable pour un engin de chantier
WO2015012423A1 (fr) * 2013-07-24 2015-01-29 볼보 컨스트럭션 이큅먼트 에이비 Circuit hydraulique pour engin de chantier
WO2015046901A1 (fr) * 2013-09-26 2015-04-02 두산인프라코어 주식회사 Appareil de commande de moteur de pivotement utilisant un frein de pivotement et procédé associé

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106869223A (zh) * 2017-02-15 2017-06-20 广西柳工机械股份有限公司 挖掘机正流量液压系统的控制方法
CN107905287A (zh) * 2017-10-24 2018-04-13 柳州柳工挖掘机有限公司 挖掘机发动机启停控制系统及控制方法
CN107905287B (zh) * 2017-10-24 2019-09-17 柳州柳工挖掘机有限公司 挖掘机发动机启停控制系统及控制方法

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