CN1132981C - Automatic driving device for building apparatus and method for controlling said automatic drive - Google Patents

Automatic driving device for building apparatus and method for controlling said automatic drive Download PDF

Info

Publication number
CN1132981C
CN1132981C CN97108769A CN97108769A CN1132981C CN 1132981 C CN1132981 C CN 1132981C CN 97108769 A CN97108769 A CN 97108769A CN 97108769 A CN97108769 A CN 97108769A CN 1132981 C CN1132981 C CN 1132981C
Authority
CN
China
Prior art keywords
motor
moving
building implements
electromagnetic valve
mentioned
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.)
Expired - Fee Related
Application number
CN97108769A
Other languages
Chinese (zh)
Other versions
CN1201096A (en
Inventor
李正奎
申福浩
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.)
Samsung Heavy Industries Co Ltd
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
Publication of CN1201096A publication Critical patent/CN1201096A/en
Application granted granted Critical
Publication of CN1132981C publication Critical patent/CN1132981C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/462—Automatic regulation in accordance with output requirements for achieving a target speed ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • 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
    • E02F9/2253—Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/421—Motor capacity control by electro-hydraulic control means, e.g. using solenoid valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
    • F16H2059/446—Detecting vehicle stop, i.e. the vehicle is at stand still, e.g. for engaging parking lock

Abstract

The automatic gear device has a magnetic valve (8) for changing a position of the gear for a drive motor (9) by controlling an angle of inclination of a tumbling disk installed in the motor. The angle is controlled based on drive motor loading, and a driving condition detecting device (16) determines whether the construction device is driving or not. A regulator (12) outputs a command to the magnetic valve, to change the position of the gear for the motor, based on an identification signal generated by the detector. The regulator switches the valve on to change the gear position between two positions based on motor loading when it is detected that the device is driving. The regulator switches the valve off to enable the gear to be set to the first gear position in spite of motor loading, when it is detected that the construction device has stopped driving.

Description

Be used for the automatic transmission of building implements and the method for the automatic transmission of control
The present invention relates to a kind of automatic transmission and a kind of method of controlling automatic transmission that is used for apparatus for building.More particularly, relate to automatic transmission and a kind of method of controlling automatic transmission that a clock is used for building implements, this method can be in mobile building implements (as excavator) process, when equipment (as a suspension rod, an arm or a well-bucket) when action, when avoiding unexpected decline of rotating speed to the impact of building implements.
Usually, the confession that is used for building implements (as excavator) is moved speed with motor and can be installed in for the angle of slope of moving with the swash plate in the motor by change and change.Just, in mobile building implements process, the angle of inclination of swash plate changes with the load on the motor according to acting on for moving.So, can between one first speed threshold position and second speed shelves, change for the travelling gear position of moving with motor.
Fig. 1 is a sketch, shows according to the confession of the building implements of prior art and moves a kind of automatic transmission with motor.Judge the work whether building implements moves or be scheduled to reference to figure 1, one controller 12 apparatus for building according to the detection signal that produces by a mobile status detecting sensor 16 and a duty detecting sensor 17 on road.Judging building implements as controller 12 by the detection signal of accepting mobile status detecting sensor 16 and duty detecting sensor 17 and sending is moving, then controller 12 is according to acting on for moving with the load on the motor 9, makes for moving with the variation between the first speed threshold position and second speed gear are put of the drive gears position of motor 19.
In the movable heavy type device procedures, if equipment control element 11 of operator's manual drives (traditional actuator lever) is operated an equipment 7, the position of control valve 6 provides the position from the flow that a centre position changes to equipment 7.As a result, the part hydraulic fluid of delivering to for mobile motor 9 from pump 2 is sent to the equipment 7.By providing of this hydraulic fluid, reduce rapidly for the speed that moves with motor 9, controller 12 forces for the drive gears position of moving with motor 9 and changes to the first speed threshold position.
If for the speed with motor 9 of moving resemble top described rapid reduction, whole hydraulic system is subjected to an impact, therefore, can produce serious vibration when the movable heavy type building implements.In addition, the durability of building implements reduces and can damage building implements.In addition, the operating period of building implements shortens, and the operator can be tired more.
Simultaneously, in mobile building implements process, when when being adapted to carry out one accurately work be set at the accurate operation mode with the mode of operation of building implements, can variation between the first speed threshold position and second speed gear are put for moving with the travelling gear position of motor 9.At this moment, be difficult to carry out reposefully accurately work.
The present invention's design solves the problems referred to above.First purpose of the present invention is to provide an automatic transmission for building implements, it can avoid acting on the impact on the building implements, with in mobile building implements process, the vibration that produces because the distribution of hydraulic fluid and the variation of drive gears position, the running speed of equipment can descend suddenly.And when the mode of operation of building implements was set at the fine work mode, it can also improve the operating efficiency of equipment.
In addition, second purpose of the present invention provides the control method of an automatic transmission, it can avoid acting on the impact on the building implements, with in mobile building implements process, the vibration that produces because the distribution of hydraulic fluid and the variation of drive gears position, the running speed of equipment can descend suddenly.And when the mode of operation of building implements was set at the fine work mode, it can also improve the operating efficiency of equipment.
In order to realize above-mentioned first purpose, the present invention provides automatic transmission for building implements, this automatic transmission comprises: a kind of automatic transmission that is used for building implements, this automatic transmission comprises: an electromagnetic valve, it is according to acting on for moving with the load on the motor, be installed in for the angle of inclination of moving by control, change for the travelling gear position of moving with motor with the swash plate in the motor; A mobile status detecting element is used to judge whether building implements is moving; With a controller, the detection signal that is used for producing according to above-mentioned mobile status detecting element sends an order that changes the drive gears position to above-mentioned electromagnetic valve, when detecting building implements, moving above-mentioned feed status detecting element, above-mentioned controller is connected above-mentioned electromagnetic valve, according to acting on the load of carrying on the motor, make for the drive gears position of moving between the first drive gears position and the second transmission position, to change with motor; Stop to move when above-mentioned mobile status detecting element detects building implements, above-mentioned controller disconnects above-mentioned electromagnetic valve, no matter acts on for mobile much with the load on the motor, but is fixed on the first speed threshold position for the drive gears position of moving with motor.
In addition, in order to realize above-mentioned second purpose, the invention provides and a kind ofly send out the method for controlling the automatic transmission of building implements with the angle of slope of the swash plate in the motor for moving that is contained in by control, whether this method comprises following each step: detect for moving with motor and operating; Connect electromagnetic valve,,, connect electromagnetic valve and make the variation between the first speed threshold position and a second speed gear are put of transmission position according to acting on for moving with the load on the motor in moving with motor operated process; With the disconnection electromagnetic valve, in for the mobile beginning operating process of stopping with motor,, be set on first speed threshold to the drive gears position no matter the load that acts on the conveying motor is much.
Best, the method for controlling automatic transmission also comprises the step of connecting electromagnetic valve so that when moving and building implements when being in the accurate operation mode for moving with motor, electromagnetic valve with the travelling gear set positions on the first speed threshold position.
In addition, when controller had been broken, the operator can manually change the travelling gear set positions on the first speed threshold position or between the first drive gears position and the second drive gears position.
With reference to the accompanying drawings, by the detailed introduction to preferred embodiment, above-mentioned target of the present invention and further feature and advantage will be more obvious.These accompanying drawings comprise:
Fig. 1 is a sketch, shows a kind of automatic transmission according to the building implements of prior art;
Fig. 2 is a sketch, shows a kind of automatic transmission of building implements according to a preferred embodiment of the invention;
Fig. 3 is a flow process sketch, shows a kind of control method of the automatic transmission of building implements according to the preferred embodiment of the invention;
Fig. 4 is a sketch, shows a kind of automatic transmission of building implements according to another embodiment of the present invention;
Fig. 5 is a flow process sketch, shows a kind of control method of the automatic transmission of building implements shown in Figure 4.
Below with reference to the accompanying drawings, introduce a preferred embodiment of the present invention in more detail.
Fig. 2 is a sketch, shows an automatic transmission of building implements in accordance with a preferred embodiment of the present invention.With reference to figure 2, the pump 2 that is driven by motor 1 is provided to one in the motor 9 of mobile usefulness by first control valve 5 with a hydraulic fluid.First control valve 5 is operated by a mobile device executive component 10.At this moment, pump 2 is provided to an equipment 7 by second control valve 6 with hydraulic fluid.Second control valve 6 is operated by an equipment operating unit 11.Electromagnetic valve 8 controls are for the angle of slope of moving with a swash plate of motor 9.Electromagnetic valve 8 is accepted the signal that controller 12 sends by first relay 13 and second relay 14.
If mobile status detecting sensor 16 detects building implements and moving, controller 12 cuts off first relay 13.Therefore, electromagnetic valve 8 is switched on, and in the building implements moving process, according to acting on for moving with load on the motor 9, the position of travelling gear changes between the first speed threshold gear position and second speed shelves gear position.
Simultaneously, stop to move if mobile status detecting sensor 16 detects building implements, controller 12 is connected first relay 13.Therefore, electromagnetic valve 8 disconnects, and in the moving process of building implements, no matter act on for mobile much with the load on the motor 9, the position of travelling gear but is fixed on the gear position of first speed threshold.
Fig. 3 is a flow process sketch, shows a kind of control method of the automatic transmission of building implements according to the preferred embodiment of the invention.With reference to figure 3, in step S1, controller 12 is accepted the detection signal that mobile status detecting sensor 16 produces.In step S2, controller 12 judges according to the detection signal of accepting from mobile detecting sensor 16 whether building implements is in mobile status.At this moment, if building implements moves, controller 12 execution in step S3.In addition, if building implements stops to move, controller 12 execution in step S4.
In step S3, controller 12 cuts off first relay 13, thereby the electromagnetic valve 8 that is used to control the angle of slope of swash plate is switched on.Therefore, in the building implements moving process, according to acting on for moving, between the first speed threshold gear position and second speed shelves gear position, change for the position of moving with the travelling gear of motor 9 with the load on the motor 9.
In step S4, controller 12 is connected first relay 13, thereby the electromagnetic valve 8 that is used to control the angle of slope of swash plate is disconnected.Therefore, no matter act on for mobile much with the load on the motor 9, the position of travelling gear but is fixed on the first speed threshold gear position.Said process carries out repetition at interval by certain hour.
Fig. 4 is a schematic diagram, the automatic transmission of its expression building implements according to another embodiment of the invention, and Fig. 5 is a flow chart, schematically shows the control method that moves the automatic transmission of using motor in the confession of building implements shown in Figure 4.
Except that the working method setting member, the structural similarity of the structure of automatic transmission shown in Figure 4 and automatic transmission shown in Figure 2.With reference to figure 4 and Fig. 5, be in meticulous mode of operation when feed status detecting sensor 16 detects building implements simultaneously in mobile and building implements, the duty setting member will be for the mobile gear position of using the travelling gear set positions of motor 9 at first speed threshold.In addition, when detecting building implements simultaneously, moving by mobile status control sensor 16, and building implements is in a certain bad mode of operation, and the revolutions per minute of motor (RPM) setting member 18 will be for the mobile travelling gear set positions of motor 9 of using between the first speed threshold gear second speed shelves gear position.
As mentioned above, in automatic transmission and the control method thereof that is used for building implements of the present invention, controller judges whether building implements moves, and the position of control drive motor drive gears.Just, if building implements moves, in the building implements moving process, according to acting on for moving with the load on the motor, controller is supplying the mobile Position Control of travelling gear of using between the first speed threshold gear position and second speed shelves gear position.In addition, if building implements stops to move, controller will fix on the first speed threshold position for mobile installing with the motor driving gear.Therefore, in carrying the jumbo process, when operator's operation element device, can limit the impact and the vibration to the building implements generation of the changes in flow rate of hydraulic fluid.
As a result, can alleviate operator's fatigue, improve the durability and the application life of building implements.In addition, because in the movable heavy type device procedures, when building implements is in fine work state following time, for moving travelling gear fixed-site with motor at the first speed threshold gear position, so, can carry out work such as repairing reposefully.
In addition, when controller had been broken, the operator can be with the travelling gear set positions at the first speed threshold gear position, or with transmission switch 15 by manually the drive gears position being changed between the first speed threshold position and second speed gear are put.
Though, with reference to the specific embodiment of the invention, illustrate and introduced the present invention, to being proficient in the people of present technique, must be clear that the present invention can have various variations in form and details under the spirit of the present invention of not leaving the claim defined and category prerequisite.

Claims (5)

1. automatic transmission that is used for building implements, this automatic transmission comprises:
An electromagnetic valve, it is installed in for the angle of inclination of moving with the swash plate in the motor by control according to acting on for moving with the load on the motor, changes for the travelling gear position of moving with motor;
A mobile status detecting element is used to judge whether building implements is moving; With
A controller, the detection signal that is used for producing according to above-mentioned mobile status detecting element sends an order that changes the drive gears position to above-mentioned electromagnetic valve, when detecting building implements, above-mentioned feed status detecting element connects above-mentioned electromagnetic valve at mobile above-mentioned controller, according to acting on the load of carrying on the motor, make for the drive gears position of moving between the first drive gears position and the second transmission position, to change with motor; Stop to move when above-mentioned mobile status detecting element detects building implements, above-mentioned controller disconnects above-mentioned electromagnetic valve, no matter acts on for mobile much with the load on the motor, but is fixed on the first speed threshold position for the drive gears position of moving with motor.
2. automatic transmission as claimed in claim 1, it is characterized by, building implements comprises the working mode selection element, be used to select the working method of building implements, when above-mentioned mobile status detecting element detects building implements simultaneously when moving and by above-mentioned working mode selection element building implements being set in the accurate operation mode, above-mentioned controller allows revolutions per minute (RPM) setting member of said motor to install for mobile driving gear with motor to be decided to be the first speed threshold position.
3. automatic transmission as claimed in claim 1 is characterized by, and building implements comprises a transmission switch, and it allows the operator manually the set positions of drive gears to be changed in the first speed threshold position or between the first speed threshold position and second speed gear are put.
4. one kind is installed in the method for controlling the automatic transmission of building implements with the angle of slope of the swash plate in the motor for moving by control, this method comprise following each go on foot:
Detect for whether moving with motor in operation;
Connect electromagnetic valve,,, connect electromagnetic valve and make the variation between the first speed threshold position and a second speed gear are put of transmission position according to acting on for moving with the load on the motor in moving with motor operated process; With
Disconnect electromagnetic valve, in for the mobile beginning operating process of stopping with motor, the load of carrying on the motor is much regardless of acting on, and is set on first speed threshold to the drive gears position.
5. automatic transmission control method as claimed in claim 4 also comprises the connection electromagnetic valve, so that when supplying to move with motor when mobile and building implements are in the accurate operation mode, electromagnetic valve installs driving gear and fixes on the first speed threshold position.
CN97108769A 1997-05-31 1997-12-19 Automatic driving device for building apparatus and method for controlling said automatic drive Expired - Fee Related CN1132981C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1019970022598A KR100446686B1 (en) 1997-05-31 1997-05-31 Automatic transmission and method
KR22598/97 1997-05-31
KR22598/1997 1997-05-31

Publications (2)

Publication Number Publication Date
CN1201096A CN1201096A (en) 1998-12-09
CN1132981C true CN1132981C (en) 2003-12-31

Family

ID=19508272

Family Applications (1)

Application Number Title Priority Date Filing Date
CN97108769A Expired - Fee Related CN1132981C (en) 1997-05-31 1997-12-19 Automatic driving device for building apparatus and method for controlling said automatic drive

Country Status (4)

Country Link
JP (1) JPH10338043A (en)
KR (1) KR100446686B1 (en)
CN (1) CN1132981C (en)
DE (1) DE19758240B4 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10201838A1 (en) 2002-01-18 2003-07-31 Zahnradfabrik Friedrichshafen control
KR101969175B1 (en) 2012-12-24 2019-04-15 두산인프라코어 주식회사 Automatic transmission type excavator
KR200486161Y1 (en) 2016-07-05 2018-05-28 훌루테크 주식회사 hydraulic control system for construction equipment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3433495A1 (en) * 1984-09-12 1986-03-20 Hydromatik GmbH, 7915 Elchingen TRANSMISSION UNIT FOR A TRAVEL DRIVE, CONSISTING OF AN ADJUSTABLE HYDROSTATIC TRANSMISSION AND A POST-GEARBOX TRANSMISSION
JP2584765B2 (en) * 1987-03-31 1997-02-26 日産自動車株式会社 Transmission control device for automatic transmission
DE19520454C1 (en) * 1995-03-30 1996-08-01 Orenstein & Koppel Ag Load-dependent automatic changeover of at least one two-stage hydraulic drive motor of mobile building machine

Also Published As

Publication number Publication date
KR100446686B1 (en) 2004-10-14
KR19980086292A (en) 1998-12-05
DE19758240B4 (en) 2005-03-31
CN1201096A (en) 1998-12-09
JPH10338043A (en) 1998-12-22
DE19758240A1 (en) 1998-12-03

Similar Documents

Publication Publication Date Title
CN1070565C (en) Method for controlling operation of power excavator
US5297019A (en) Control and hydraulic system for liftcrane
KR100801383B1 (en) Working vehicle
CN102341547B (en) The control method of building machinery, building machinery and make computer perform the program of the method
US20240084547A1 (en) Apparatus and method for actively reducing action impact of excavator, and excavator
EP0422821B1 (en) Control and hydraulic system for liftcrane
CN102656323B (en) Position control apparatus and method for working machine of construction machinery
CN101463612A (en) Shock absorption device and control method thereof for small swing radius excavator
KR20040014393A (en) Robot
CN1132981C (en) Automatic driving device for building apparatus and method for controlling said automatic drive
CN102428290A (en) Construction Vehicle
EP1796931A1 (en) Power machine having traction lock with speed-range selector
CN1157359A (en) Method for controlling RPM of engine in hydraulic construction machine
US5196773A (en) Controller for rivetting machine
CN1673553A (en) Hydraulic cylinder suspension method
CN2134484Y (en) Automatic control device for slurry pump of petroleum well drilling
CN1103864C (en) Apparatus for enhancing operation ability of heavy equipment in fine operation mode and method therefor
CN115413438B (en) Rear suspension inching control system, method and tractor
CN1184213A (en) Control device for travelling system in construction vehicles
JPH02229639A (en) Controller of riveting machine
JP2603269Y2 (en) Crane operation control device
CN1521406A (en) Speed control apparatus for hydraulic actuator
KR0138706B1 (en) Driving and work interlocking control device and method of construction heavy equipment
CN116255180A (en) Linkage control method and system for working face hydraulic support and two-lane equipment
CN2748474Y (en) Filming clamp control device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C53 Correction of patent for invention or patent application
CB02 Change of applicant information

Applicant after: Volvo Construction Equipment (Korea) Co., Ltd.

Applicant before: Samsung Heavy Industries Co., Ltd.

COR Change of bibliographic data

Free format text: CORRECT: APPLICANT; FROM: SAMSUNG HEAVY INDUSTRIES CO., LTD. TO: VOLVO CONSTRUCTION EQUIPMENT(COREA)LTD.

C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C53 Correction of patent for invention or patent application
COR Change of bibliographic data

Free format text: CORRECT: APPLICANT; FROM: VOLVO CONSTRUCTION EQUIPMENT(COREA)LTD. TO: VOLVO CONSTRUCTION EQUIPMENT HOLDINGS(SWEDEN)LTD.

CP02 Change in the address of a patent holder

Address after: Swedish Eskil steynor

Applicant after: Volvo Building Equipment Holding (Sweden) AG

Address before: Changwon, Korea

Applicant before: Volvo Construction Equipment (Korea) Co., Ltd.

C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee