WO1996028377A1 - Procede et systeme pour controler la vitesse d'un treuil - Google Patents

Procede et systeme pour controler la vitesse d'un treuil Download PDF

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Publication number
WO1996028377A1
WO1996028377A1 PCT/JP1995/000394 JP9500394W WO9628377A1 WO 1996028377 A1 WO1996028377 A1 WO 1996028377A1 JP 9500394 W JP9500394 W JP 9500394W WO 9628377 A1 WO9628377 A1 WO 9628377A1
Authority
WO
WIPO (PCT)
Prior art keywords
speed
winch
pressure
pilot
valve
Prior art date
Application number
PCT/JP1995/000394
Other languages
English (en)
Japanese (ja)
Inventor
Kinya Mori
Original Assignee
Komatsu Ltd.
Komatsu Mec Kabushiki Kaisha
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 Komatsu Ltd., Komatsu Mec Kabushiki Kaisha filed Critical Komatsu Ltd.
Priority to EP95910783A priority Critical patent/EP0819646A4/fr
Priority to PCT/JP1995/000394 priority patent/WO1996028377A1/fr
Priority to KR1019970706265A priority patent/KR19980702858A/ko
Publication of WO1996028377A1 publication Critical patent/WO1996028377A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/42—Control devices non-automatic
    • B66D1/44—Control devices non-automatic pneumatic of hydraulic

Definitions

  • the present invention relates to a winch speed control method and system, and more particularly to a winch speed control method and system for driving a winch drum by hydraulic pressure.
  • a winch device used for a crane or the like includes, for example, a main winch 50 and a capture winch 60 as shown in FIG.
  • the main winding winch 50 driven by hydraulic pressure is connected to a hydraulic motor 51, a speed reducer 52 driven by the hydraulic motor 51, an output shaft 52 a of the speed reducer 52, and a main drum 56.
  • a brake drum 54a is fixed to the flange portion of the main drum 56, and a nozzle brake 54 is wound around the brake drum 54a.
  • the rotation of the hydraulic motor 51 is accelerated by the speed reducer 52 and transmitted to the output shaft 52a, and when the clutch 53 is connected, the main drive is driven via the drive shaft 55. Is transmitted to system 56.
  • the rotation of the main drum 56 can be controlled according to the rotation of the hydraulic motor 51.
  • the winch is used. Used in leaffall prone. In these cases, when the clutch 53 is opened, the suspended load of the main winch 50 is in a free falling state.
  • the brake 54 When controlling the falling speed, the brake 54 is pressed against the brake drum 54a, and the braking force is adjusted according to the degree of pressing. As described above, it is used in the free fall state. When using it, a light load can be dropped in a short time or a large impact force can be obtained with a heavy object such as a hammer. Note that the configuration and operation of the auxiliary winch 60 are the same as those of the main winch 50, and a description thereof will be omitted.
  • the present invention has been made to solve the problems of the related art, and the drive device for the winch drum and the winch drum are always in a connection state to eliminate the free-full state. It is another object of the present invention to provide a winch speed control method and a system for improving the safety and operability of an operator.
  • the rotational speed of the winch drum is substantially univocal relative to the stroke of the operating lever up to a predetermined stroke of the operating lever.
  • the number of rotations for the same stroke of the operating lever is different depending on the speed mode selected from a plurality of speed modes.
  • the selected speed mode may be switched to another speed mode in a stroke in the middle of a predetermined stroke or more.
  • the switching of the speed mode may be possible under a preset condition when switching from the low speed mode to the high speed mode.
  • the winch drum rotation speed up to a predetermined stroke may gradually increase in response to the increase in the stroke of the operation lever, and may be the same among a plurality of speed modes.
  • the winch drum rotation speed up to a predetermined stroke is the same, so that the operator has a common operational feeling at the start of operation, and good operability is obtained.
  • the stroke exceeds a certain value, for example, the speed will increase
  • the winch drum rotation speed is gradually increased, the fine operability is improved by lowering the rotation speed at the start of operation.
  • different speed modes can be selected as necessary, and high operability can be obtained.
  • the first invention of the winch speed control system includes a regulator for supplying a control pressure corresponding to a pilot pressure to a control cylinder of a variable hydraulic motor, and a pilot valve for a pilot-operated valve.
  • a pilot line for connecting a pilot valve for supplying a pilot pressure, and a mode switching valve for communicating or shutting off the pilot port line are provided.
  • a setting means is provided in the regulator, and the setting means stops the operation of the regulator until a predetermined pilot pressure is reached.
  • the pilot pressure is equal to or higher than a predetermined pilot pressure
  • the variable type is controlled according to a control pressure of a regulator.
  • the specific volume of the hydraulic motor may be reduced.
  • the mode switching on / off valve is a solenoid-driven mode switching on / off valve having a solenoid.
  • An electrical signal may be output to the
  • a throttle device S may be provided in the control pressure pipeline connecting the control cylinder and the control cylinder.
  • a placement control means for the variable hydraulic motor a connection means for connecting the capacity control means and the piston port of the control cylinder, and a placement setting means comprising a capacity setting member and a stove.
  • the displacement setting member is fixed to one of the displacement control means, the piston rod, and the connection means to set the minimum displacement of the variable hydraulic motor, and the stopper regulates movement of the displacement setting member. Alternatively, it may be canceled.
  • the winch drum in a state where the regulator and the pilot valve are in communication with each other, the winch drum is controlled by the pilot-type operation valve and the variable hydraulic motor whose fixed capacity is reduced by the control cylinder.
  • the rotation speed is controlled.
  • the control pressure of the regulator since the regulator is not operated in the shut-off state, the control pressure of the regulator is not supplied to the control cylinder of the variable hydraulic motor. Therefore, the winch drum rotation speed is controlled only by the pilot operated valve operated in accordance with the pilot pressure.
  • the setting means for example, a spring attached to the regulator
  • the control cylinder is not supplied with the control pressure of the regulator until the predetermined stroke of the operation lever, so that the pilot-type operation is performed.
  • the valve controls the winch drum speed.
  • the specific volume of the variable hydraulic motor decreases due to the control pressure of the regulator in accordance with the pilot pressure. Accordingly, the winch drum rotation speed is controlled by the reduced specific volume and the pilot operated valve. If the mode switching valve is shut off at this time, the winch drum rotation speed is controlled only by the pilot type operation valve, and therefore decreases with respect to the stroke of the same operation lever.
  • the winch drum rotation speed is almost uniquely determined with respect to the stroke of the operation lever, regardless of whether the mode switching on-off valve is connected or disconnected.
  • the winch drum rotation speed becomes the rotation speed corresponding to each mode even if the operation lever is the same stroke.
  • the speed mode can be switched by the switch while controlling the winch drum rotation speed with the control lever.
  • the above-described expansion device when the above-described expansion device is provided, there is no sudden change in the specific capacity of the variable hydraulic motor, so that a rapid change in the winch drum rotation speed can be prevented. As a result, the safety and the durability of the device can be improved.
  • the variable hydraulic motor when the stopper regulates the movement of the capacity setting member, the variable hydraulic motor has a predetermined minimum specific volume. On the other hand, when the movement restriction is released, the specific volume of the variable hydraulic motor can be reduced to 0, and the winch can be operated in a free-full state.
  • a selection valve is provided, and the selection valve controls the pressure between the predetermined pressure of the pressure source and the driving pressure of the variable hydraulic motor that drives the winch drum. It is characterized in that the higher pressure is selected from among these and is supplied as the original pressure for the regiure.
  • the control pressure supplied to the control cylinder of the variable hydraulic motor is such that the predetermined pressure of the pressure source is the original pressure while the drive pressure of the variable hydraulic motor is low.
  • this drive pressure becomes the original pressure of the regulator and is supplied to the control cylinder of the variable hydraulic motor, so that the specific volume of the variable hydraulic motor can be reliably controlled. .
  • a third invention of the winch speed control system comprises a relief valve for controlling the return hydraulic pressure of the hydraulic motor to a predetermined pressure when the winch drum is lowered, and a relief valve installed at a connection between the hydraulic motor and the winch drum.
  • a switching valve is provided between the negative brake and the negative brake, and this switching valve communicates or shuts off the pilot pressure for releasing the function of the relief valve and the pilot pressure for opening the negative brake.
  • FIG. 1 is a control circuit diagram for the main winding pinch and a part of the auxiliary winding inch according to the embodiment of the present invention
  • FIG. 2 is a chart illustrating Hi / rated mode, Hi / high-speed mode, L0-no rated mode, and LoZ high-speed mode, which are the speed modes according to the embodiment.
  • FIG. 3 is a diagram for explaining the speed control system of the winch according to the embodiment, and is a chart showing the relationship between the operation stroke of the main winding winch and the rotation speed of the winch drum
  • FIG. 4 is a main winding winch according to the embodiment.
  • FIG. 5 is a schematic diagram of a ⁇ inch apparatus according to the related art. BEST MODE FOR CARRYING OUT THE INVENTION
  • Fig. 1 is a winch pump for driving a winch
  • 3 is a pressure compensation valve
  • 4 is a pilot operated valve
  • 5 is an operating lever for operating a winch
  • 5a is a pilot operated valve.
  • 5 b is a high-speed mode switching button.
  • Reference numeral 6 denotes a hydraulic motor (in this embodiment, a variable hydraulic motor is used); 6b, a splash plate (capacity control means) provided in the hydraulic motor 6; 7a, a check valve;
  • a relief valve, 8 is a control pump (pressure source) for supplying the control pressure of this speed control system, 9 is a switching valve for supplying the control pressure of the motor, and 9a is a control of the auxiliary winding winch.
  • a switching valve for supplying pressure 11 is a switching valve for the source pressure of the pilot port of the pilot pump 8 maintained at a constant pressure by the relief valve 10, and 12 is built in the hydraulic motor 6.
  • a negative brake 13 is a winch drum driven by a hydraulic motor 6.
  • Reference numeral 18 denotes a high-speed mode switching valve for switching the pilot pressure of the pilot valve 5a output via the shuttle valve 23, and reference numeral 19 denotes a high-speed mode switching valve provided via the high-speed mode switching valve 18.
  • Pilot pressure and setting spring (setting means) Regulating unit for capacity control of hydraulic motor 6 controlled by the difference between 19a spring force and 20 are control cylinders for hydraulic motor 6, 20 a is a link (connection means) for connecting the piston rod of the control cylinder 20 to the splash plate 6b, and 21 is a throttle provided in a control pressure line to the control cylinder 20.
  • Reference numeral 22 denotes a relief valve provided between the main driving lines of the hydraulic motor 6.
  • reference numeral 24 denotes a controller
  • reference numeral 24a denotes an AND circuit constituting the controller 24.
  • the AND circuit 24a has (i) the 0N signal of the high-speed mode switching button 5b, and (ii) the lower-side pilot pressure of the pilot valve 5.
  • an excitation signal is outputted to the solenoid 18 a of the high-speed mode switching valve 18.
  • condition (ii) is a problem when speeding up the hoisting work, for example, excessive winding due to irregular winding of the rope due to deterioration of the winding ability of the rope on the drum, or sudden stop when the hook is overwound. This is to avoid the occurrence of a click.
  • Condition (iii) is that even if the lifting load exceeds the holding capacity of the hydraulic motor, This is to prevent lowering.
  • the rope tension is an input signal corresponding to the suspension load, and a load that directly acts on the winch device from the outside is an input signal.
  • the rope tension can be obtained, for example, by dividing the suspension load obtained via the overload prevention device by the hook number of the hook previously input.
  • Reference numeral 27 denotes a low-pressure relief valve provided in the winch lowering line
  • reference numeral 28 denotes a tank
  • reference numeral 30 denotes a drum free switch
  • reference numeral 31 denotes a drum free switching valve
  • reference numeral 32 denotes a brake.
  • a throttle provided in a pipeline that supplies the pilot pressure of the pilot pump 8 to the negative brake 12 via the valve 11, 33 is a solenoid-operated on-off valve
  • 34 is a capacity setting cylinder 34 a Capacity setting means including a capacity setting member 34 b fixed to the piston rod of the control cylinder 20, 35 a, 35 b and 35 c are check valves.
  • the speed modes of the present embodiment include four modes, i.e., Hi rated mode and Hi no high speed mode at high engine speed, and L0 rated mode and L0 no high speed mode at low engine speed. .
  • the auxiliary winding winch is the same as the main winding winch, and the description is omitted.
  • FIG. 1 when the operation lever 5 is operated, a pilot pressure corresponding to the operation amount is output from the pilot valve 5a, and the pilot-type operation valve 4 is operated. A flow rate corresponding to the operation amount of the pilot operated valve 4 is supplied from the winch pump 1 and a boom pump (not shown) to the hydraulic motor 6 and is taken out from the pilot operated valve 4 at the same time.
  • the switching valve 9 is switched to the position b by the load pressure.
  • the control pressure of the pilot pump 8 is supplied to the brake valve 11 via the b position of the switching valve 9 and the throttle 32, so that the braking of the negative brake 12 is released.
  • the winch drum 13 is moved to the operation amount of the operation lever 5. It rotates at the corresponding rotation speed.
  • the drum free switch 30 When the winch drum 13 is to be free-rotated, the drum free switch 30 is turned on, so that the drum free switching valve 31 is at the b position and the brake valve 11 is at the a position. become. As a result, the negative brake 12 is released by the control pressure of the control pump 8, and the control pressure of the control pump 8 is supplied to the relief valve 7b. Will be able to make a full turn on the unwinding side.
  • an electric signal of a switch (not shown) is output to the solenoid of the brake valve 11, the brake valve 11 is set to the a position, and the negative brake 1 2 To release.
  • an electric signal is also output to the solenoid of the solenoid on-off valve 33, and by setting the solenoid on-off valve 33 to the b position, the control pressure of the control pump 8 is set to the capacity. It is supplied to the rod chamber of the cylinder 34a and the control cylinder 20. As a result, the rod (stopper) of the capacity setting cylinder 34a contracts, and the movement restriction of the capacity setting member 34b is released.
  • the released capacity setting member 34 b moves the splash plate 6 b via the piston rod of the control cylinder 20 and the link 20 a, and the hydraulic motor 6 Set capacity to 0 cc / rev. Therefore, if a higher unwinding speed than the Hi-no high-speed mode is required, by setting the capacity of the hydraulic motor 6 to Occ / rev as described above, even if the clutch is omitted, the flywheel can be removed. Work is possible.
  • FIG. 2 shows four speed modes of the present embodiment.
  • the engine speed is expressed in two states, i.e., Hi state corresponding to the high idle rotation state and L 0 state corresponding to the low idle rotation state, for the sake of simplicity.
  • the actual use condition may be set to a state corresponding to an intermediate point.
  • the maximum flow rate to the hydraulic motor can be changed by changing the number of hydraulic pumps that supply hydraulic oil to the hydraulic motor according to the specific volume or speed mode of the hydraulic pump. , L i, L 0, or an intermediate state thereof.
  • the specific volume of the hydraulic motor is changed from V to 0.5 V, but the minimum specific volume is not limited to 0.5 V. Therefore, it is of course possible to appropriately select the high-speed mode and to set a plurality of the minimum specific volumes.
  • FIG. 3 is an explanatory diagram of a winch speed control system having the above configuration. Each mode at the time of lowering by the main winch shown on the right side of FIG. 3 will be described with reference to the operating conditions of FIG. 2 and FIG.
  • the pilot pressure signal Pd and the rope load signal TS which is a predetermined safety load, output from the pressure switch (installed in the pipe line on the lower side of the pilot valve type operation valve 4) are
  • the high-speed mode switching button 5b of the control lever 5 is pressed while the signal is input to the AND circuit 24a of the controller 24, the high-speed mode is switched by the signal from the AND circuit 24a.
  • Valve 18 switches to position b.
  • the pilot pressure of the pilot valve 5a is supplied to the volume control regulator 19.
  • the pressing force due to the pie mouth pressure increases the spring force of the setting spring 19a. Since the force is set smaller than the force, the displacement control regulator 19 remains at the b position.
  • the number of rotations of the drum between the lever strokes SI to S4 increases up to N4 due to the opening characteristics of the pilot operated valve 4.
  • the range between S I and S 4 is exactly the same as the Hino rated mode.
  • the winch drum rotation speed in S4 to S5 is twice the Hi-no rated mode. Since the specific volume of the hydraulic motor 6 is constant between the lever strokes S5 and S6, and the amount of increase in the flow rate due to the opening characteristics of the pilot valve 4 due to the lever stroke is small, the winch drum rotates. The number is constant at N 7.
  • the source pressure of the displacement control regulator 19 is controlled by the higher drive pressure of the hydraulic motor 6 selected by the check valves 35 a and 35 b and the relief pressure by the relief valve 10.
  • a high oil pressure is selected by the check valve 35c (selection valve) with the discharge pressure of the control pump 8 held at the pressure.
  • the original pressure is reduced according to the operation amount of the regulator 19 in accordance with the lever stroke, and is supplied to the control cylinder 20 of the hydraulic motor 6. Therefore, the control pressure supplied to the control cylinder 20 is ensured by the discharge pressure of the control pump 8 maintained at a predetermined pressure while the drive pressure of the hydraulic motor 6 is low.
  • the driving pressure of the hydraulic motor 6 increases, this driving pressure increases Since it is supplied to the control cylinder 20 as the source pressure of the gear 19, the capacity of the hydraulic motor 6 can be reliably controlled.
  • the rotation speed of the winch drum between the lever strokes SI to S3 increases to a maximum of N3 due to the opening characteristics of the pilot operated valve 4.
  • the number of rotations of the winch drum between the lever strokes S3 and S6 is N3 because the flow rate flowing into the pilot valve 4 is a predetermined maximum flow rate (constant) corresponding to the Lo rated mode. It remains constant.
  • the winch drum rotation speed is increased to a maximum of N3 by the pilot valve 4 between the lever strokes S1 and S3, and is constant N3 between the lever strokes S3 and S4. Therefore, the winch drum rotation speed between SI and S4 is the same as the Lo rated mode.
  • the rotation speed of the winch drum 13 between the lever strokes S4 and S5 is determined by the capacity reduction of the hydraulic motor 6 according to the lever stroke and the opening characteristics of the pilot operated valve 4, as in the Hi-no high-speed mode. Depending on the increase in the flow rate, the speed is reduced up to N5.
  • the winch drum rotation speed between the lever strokes S5 to S6 is a constant rotation speed N5 because the specific volume of the hydraulic motor 6 is constant and the flow rate increase due to the increase in the lever stroke is small.
  • the winch drum by always dynamically connecting the winch drum to the drive source, safety and operability are improved without a free fall state, and the unwinding speed equivalent to a free fall can be achieved by a simple operation. It is useful as a method for controlling the speed of the obtained winch and its system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

L'invention concerne un procédé et un système pour contrôler la vitesse d'un treuil qui peut améliorer la sécurité et la fiabilité de celui-ci, en évitant qu'il ne se mette dans un état de chute libre et en abaissant la vitesse par rapport à celle qui serait observée dans le cas d'une chute libre. Pour cela, la vitesse de rotation du tambour (13) du treuil est maintenue sensiblement constante par rapport à la course d'un levier de manoeuvre (5) jusqu'à ce que le levier de manoeuvre (5) effectue la course prédéterminée qui est différente de la même course du levier de manoeuvre (5) conformément au mode de vitesse choisi à partir d'une pluralité de modes de vitesses quand le levier de manoeuvre dépasse la course prédéterminée.
PCT/JP1995/000394 1995-03-10 1995-03-10 Procede et systeme pour controler la vitesse d'un treuil WO1996028377A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP95910783A EP0819646A4 (fr) 1995-03-10 1995-03-10 Procede et systeme pour controler la vitesse d'un treuil
PCT/JP1995/000394 WO1996028377A1 (fr) 1995-03-10 1995-03-10 Procede et systeme pour controler la vitesse d'un treuil
KR1019970706265A KR19980702858A (ko) 1995-03-10 1995-03-10 윈치의 속도 제어방법 및 그 장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1995/000394 WO1996028377A1 (fr) 1995-03-10 1995-03-10 Procede et systeme pour controler la vitesse d'un treuil

Publications (1)

Publication Number Publication Date
WO1996028377A1 true WO1996028377A1 (fr) 1996-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1995/000394 WO1996028377A1 (fr) 1995-03-10 1995-03-10 Procede et systeme pour controler la vitesse d'un treuil

Country Status (3)

Country Link
EP (1) EP0819646A4 (fr)
KR (1) KR19980702858A (fr)
WO (1) WO1996028377A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114857101A (zh) * 2022-05-20 2022-08-05 宁波新宏液压有限公司 一种调速液压绞车智能保护系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102745617B (zh) * 2012-07-02 2015-08-12 中联重科股份有限公司 锁紧装置自由落体的控制方法、控制器、控制系统和起重机
KR20160150556A (ko) 2015-06-22 2016-12-30 디와이 주식회사 크레인 장치
KR102662416B1 (ko) * 2023-10-12 2024-04-30 주식회사 제이피케이이노 성능 개선 윈치 브레이크 시스템
KR102662414B1 (ko) * 2023-10-12 2024-04-30 주식회사 제이피케이이노 윈치 브레이크 구조체

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JPS5554712Y2 (fr) * 1976-09-13 1980-12-17
JPS5958203A (ja) * 1982-09-28 1984-04-03 Yanase:Kk 行程容積可変ピストン形油圧モ−タの自動運転制御方法
JPS61127968A (ja) * 1984-11-22 1986-06-16 Hitachi Constr Mach Co Ltd 油圧閉回路駆動装置の速度制御装置
JPS6153318B2 (fr) * 1978-04-19 1986-11-17 Hitachi Ltd
JPS62105895A (ja) * 1985-10-31 1987-05-16 住友重機械工業株式会社 油圧回路
JPH037599B2 (fr) * 1987-07-22 1991-02-01 Kobe Seikosho Kk
JPH0357033B2 (fr) * 1987-09-28 1991-08-29

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US3870255A (en) * 1970-07-07 1975-03-11 Hughes Tool Co Hoist drive system
US5355675A (en) * 1993-08-31 1994-10-18 Western Atlas International, Inc. Stabilized speed-control system for a hydrostatic transmission

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JPS5554712Y2 (fr) * 1976-09-13 1980-12-17
JPS6153318B2 (fr) * 1978-04-19 1986-11-17 Hitachi Ltd
JPS5958203A (ja) * 1982-09-28 1984-04-03 Yanase:Kk 行程容積可変ピストン形油圧モ−タの自動運転制御方法
JPS61127968A (ja) * 1984-11-22 1986-06-16 Hitachi Constr Mach Co Ltd 油圧閉回路駆動装置の速度制御装置
JPS62105895A (ja) * 1985-10-31 1987-05-16 住友重機械工業株式会社 油圧回路
JPH037599B2 (fr) * 1987-07-22 1991-02-01 Kobe Seikosho Kk
JPH0357033B2 (fr) * 1987-09-28 1991-08-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114857101A (zh) * 2022-05-20 2022-08-05 宁波新宏液压有限公司 一种调速液压绞车智能保护系统
CN114857101B (zh) * 2022-05-20 2024-04-05 宁波新宏液压有限公司 一种调速液压绞车智能保护系统

Also Published As

Publication number Publication date
EP0819646A1 (fr) 1998-01-21
EP0819646A4 (fr) 2000-01-05
KR19980702858A (ko) 1998-08-05

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