KR101155705B1 - An apparatus for selectively controlling the option actuator in excavator - Google Patents

An apparatus for selectively controlling the option actuator in excavator Download PDF

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Publication number
KR101155705B1
KR101155705B1 KR1020040117892A KR20040117892A KR101155705B1 KR 101155705 B1 KR101155705 B1 KR 101155705B1 KR 1020040117892 A KR1020040117892 A KR 1020040117892A KR 20040117892 A KR20040117892 A KR 20040117892A KR 101155705 B1 KR101155705 B1 KR 101155705B1
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KR
South Korea
Prior art keywords
valve
optional
control
hydraulic
operation means
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KR1020040117892A
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Korean (ko)
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KR20060078296A (en
Inventor
양승우
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두산인프라코어 주식회사
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Priority to KR1020040117892A priority Critical patent/KR101155705B1/en
Publication of KR20060078296A publication Critical patent/KR20060078296A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/2004Control mechanisms, e.g. control levers
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2264Arrangements or adaptations of elements for hydraulic drives
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2264Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267Valves or distributors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60YINDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00Type of vehicle
    • B60Y2200/40Special vehicles
    • B60Y2200/41Construction vehicles, e.g. graders, excavators
    • B60Y2200/412Excavators

Abstract

The present invention relates to a mechanical and electrical control device of an optional working machine of an excavator, in addition to the main control valve of the excavator, an optional control valve is installed, and an optional working machine having two actuators is connected to one of the main control valves. The other side of the optional work machine is connected to the optional control valve in the excavator's optional work device, the pilot line connected to the left and right control solenoid package valves are respectively installed, the solenoid package valve is a shuttle valve And a hydraulic pedal valve through a solenoid switching valve for selection control, respectively, and a mechanical / electric control selection switch is connected to a solenoid of the selection control solenoid switching valve, and the selection switch is connected to a left and right joystick pushbutton. , Left The right joystick pushbutton is configured to be connected to the solenoids of the left and right control solenoid package valves, respectively. The device of the present invention having such a structure can be selected such that the optional work machine is controlled by a hydraulic pedal valve or controlled by a joystick pushbutton according to the selection direction of the mechanical / electrical control selection switch.
Figure R1020040117892
Mechanical and electrical controls of excavators, optional controls of excavators, controls of excavators

Description

An apparatus for selectively controlling the option actuator in excavator}

1 is a schematic hydraulic circuit diagram of a control device of a conventional excavator option work machine,

Figure 2 is a schematic hydraulic circuit diagram of the control device of the excavator optional working tool according to the present invention.

※ Explanation of Codes on Major Parts of Drawings

2: engine 4: main pump

6: main control valve block 18: control spool

20: pilot pump 22: crusher

22a: Hydraulic hydraulic motor for swing 22b: Hydraulic cylinder

24: Option Control Spool

26: optional control valve 28: spool

30: pilot line 32: solenoid package valve

34: solenoid package valve 36: shuttle valve

38: shuttle valve 40: solenoid valve for selective control

42: hydraulic pedal valve 44: selection switch

46: left joystick pushbutton 48: right joystick pushbutton                 

50: solenoid 52: solenoid

54: power supply 56: switching lever

The present invention relates to a pilot hydraulic control device of a work machine optionally attached to an excavator, and more particularly, to an optional work machine control device of an excavator that enables the operator to mechanically and electrically control the pilot hydraulic control circuit of an optional work machine.

In general, an excavator is provided with a concrete building in addition to operating various main working machines such as booms and shovels through the main control valve block 103 with the hydraulic oil supplied from the main pumps 101 and 102 by the operation of the engine E. Two-way work tools such as crushers or clamshells, which are used to destroy or break hard objects, can be selectively attached and used.

A work machine such as a cramshell or a crusher is commonly referred to as an optional work tool 104, in which only one actuator is installed and two actuators are installed.

For example, as shown in FIG. 1, an optional work tool such as a hydraulic crusher 104 used for crushing a structure or a concrete building, etc., is essentially provided with a hydraulic cylinder 104a for operating the tongs. There are some with and without the hydraulic motor 104b which can turn a part.

In the case of using a work machine having only one actuator as in the case of the crusher, it can be controlled through an optional spool 103a provided in the main control valve block 103 of the excavator, and the work machine having two actuators. When using the main control valve block 103 can not be completely controlled.

This is because only one spool of the optional work machine is provided in the main control valve block because of the size of the main control valve block and the hydraulic performance of the excavator.

Therefore, an additional optional control valve 105 is installed and used outside the main control valve block 103, and the hydraulic pedal valve 107 controls the flow of pilot pressure oil for switching the optional control valve 105 to operate. ), Or using the left and right joystick pushbuttons 108, the method of using the hydraulic pedal valve 107 to operate using the foot "mechanical" or "hydraulic control method" In this regard, the method using the left and right joystick pushbuttons 108 which are operated by hand is referred to as "electric control method".

By the way, in the conventional general excavator, such a control method has been selected as individual order production. That is, in the electric control method, as shown by "A" in FIG. 1, the pressure oil of the pilot pump 106 is transmitted to the left and right hydraulic pressure parts 105a and 105b of the optional control valve 105 for the option. Left and right solenoid on-off valves 110 and 111 for switching the control valve 105 to one side, and a joystick push button 108 for selectively applying power to the solenoid parts of the left and right solenoid on-off valves 110 and 111. Unit (B),

In the hydraulic control method, as indicated by "B" in FIG. 1, the hydraulic pressure of the pilot pump 106 is transferred to the left and right hydraulic pressure units 105a and 105b of the optional control valve 105 to control the optional control valve. It consists of the unit A which consists of a pedal valve 107 which controls 105 to switch to either side.

Thus, one of the two types of units A and B is selected according to the requirements of the consumer, and connected to the coupling 112 provided in the pilot signal input terminal of the optional control valve 105.

As a result, it was difficult for the producers to provide timely supply in response to various consumer specifications, and when the planned option product was changed, the cost went up or the delivery time was difficult to remove or install new parts. And cost increases.

In particular, in the case of overseas export, there were problems such as an increase in costs (mounting, removal, disposal, gratuitous supply) and loss of sales opportunity due to the uncertainty of the order specification and the error of the hit ratio. .

Accordingly, the present invention solves the various problems that occur in the conventional excavator as described above, so that the driver can simply select the operation method of the optional working tool of the excavator, according to the selection of the operating method of the optional working tool of the excavator It is an object of the present invention to provide a mechanical and electrical control device for an optional working machine of an excavator that prevents problems from occurring.

The apparatus of the present invention for achieving the above object is an optional work machine control device formed of at least two actuators,

The actuator control spool of any one of the actuators of the optional work machine is installed in the main control valve, and the other actuator control spool is configured as an option control valve installed separately from the main control valve. Both hydraulic parts of the valve are selectively connected to or disconnected from the electric operation means or the hydraulic operation means including the solenoid package valves by means of a shuttle valve, and selected to be selectively operated between the electric operation means and the hydraulic operation means. It is provided with a selection means.

The selection means is provided on a flow path connecting the hydraulic operation means and the hydraulic pressure sides of the option control valve, the selection control solenoid switching valve for opening and closing the flow path, and selectively supplying power to the switching valve or the electric operation means. Mechanical / electrical control selection switch.

And the electric operation means is made of a left and right joystick push button, the hydraulic operation means is composed of a hydraulic pedal valve operated in both directions.

The apparatus of the present invention having such a structure selects such that the optional work machine is controlled by a hydraulic pedal valve or controlled by a left and right joystick pushbutton while the selection control solenoid valve is switched according to the selection direction of the mechanical / electric control selection switch. There is a number.

Therefore, the device according to the present invention can be selected and used so that the driver can simply adjust the optional work machine by mechanical or electric method as needed.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

FIG. 2 is a schematic hydraulic circuit diagram of the hydraulic control device of the optional working machine according to the present invention. As shown in FIG. 2, the main pump 4 is operated by the engine 2, and the main pump 4 is operated. The hydraulic oil generated from the boom cylinder (not shown), bucket cylinder (not shown), arm cylinder (not shown), driving motor (not shown) and swing motor (not shown) are provided through the main control valve block (6). It is to be delivered to the main working machine such as).

In addition, the spool of each work machine installed in the main control valve block 6 is switched by the pilot pressure oil generated by the pilot pump 20 which is operated together with the main pump 4.

On the other hand, as an example of the optional work machine 22 in the present invention, the crusher includes a hydraulic cylinder 22b for tongs and a hydraulic motor 22a for swing, and the hydraulic cylinder 22b that requires a large hydraulic force is the main. Connected to the option spool of the control valve (6) is to receive the large pressure oil of the main pump (4) as it is, the turning hydraulic motor (22a) is an optional control installed separately from the main control valve block (6) The pressure-reduced pressure oil is delivered through the valve 26.

Here, the spool 28 of the option control valve 26 is also switched by the pilot pressure oil supplied from the pilot pump 20.

In addition, two solenoid package valves 32 and 34 for left and right control are respectively installed in the middle of the pilot line 30 connecting the pilot pump 20 and the spool 28 of the option control valve 26. The left and right control solenoid package valves 32 and 34 are connected to the hydraulic pedal valve 42 for controlling the operation direction of the optional work tool 22 through the shuttle valves 36 and 38 and the selective control solenoid switching valve 40, respectively. It is.

In addition, a mechanical / electrical control selection switch 44 is connected to the solenoid 40a of the selection control solenoid switching valve 40, and the selection switch 44 is connected to the left and right joystick push buttons 46 and 48. The left and right joystick push buttons 46 and 48 are connected to the solenoids 50 and 52 of the left and right control solenoid package valves 32 and 34, respectively.

The selection switch 44 has a two-stage switching lever 56 for connecting the power supply 54 to the solenoid 40a of the selection control solenoid valve 40 or to the left / right joystick pushbuttons 46 and 48 selectively. ) Is provided.

The apparatus of the present invention having such a structure can operate the option work machine 22 mechanically or electrically by selectively operating the selector switch 44 installed in the cab to one side, and the switching lever 56 of the selector switch 44 If it is selected to the first stage, the current is not applied to the left and right joystick pushbuttons 48 from the power source 54, and the current is applied to the solenoid 40a of the selection control solenoid valve 40 so that the solenoid valve 40 ) Will switch to the "on" state.

In this state, when the driver selectively operates the left and right hydraulic pedal valve 42 to be operated using the foot, the pressure oil delivered from the pilot pump 20 is transferred to both shuttle valves 36 and 38 through the solenoid valve 40. Will be delivered to either side.

On the other hand, by switching the switching lever 56 of the selector switch 44 toward the hydraulic pedal valve 42, current is also applied to the solenoid package valves 32 and 34 connected to the opposite sides of the shuttle valves 36 and 38. Since it is not applied, the spool of the option control valve 26 passes through the one side of the option pilot lines 58 and 60 so that the hydraulic pressure of the pedal valve 42 delivered to the shuttle valves 36 and 38 as described above. The pressure oil supplied from the main pump 4 by being switched to the spool 28 in one direction and operated under the pressure of the crusher which is the optional work machine 22 through the port of the option control valve 26 is transferred to the 28. Is introduced into the hydraulic motor (22a) is to be rotated to operate in the selected rotation direction.

The operation method as described above is the "machine controlled method" of the optional work tool 22 in which the driver presses the hydraulic pedal 42 to control, and then the left and right joystick pushbuttons 46 and 48 are operated by hand to operate the optional work tool. It describes the "electrically controlled method" to control the.

First, when the switching lever 56 of the selection switch 44 is switched to the second stage, the connection with the power supply 54 is cut off so that a current is not applied to the solenoid 40a of the selection control solenoid valve 40. Therefore, the solenoid valve 40 is switched to the "off" state, the pressure oil is not transmitted from the pedal valve 42 to the shuttle valve (36,38).

Instead, when the selector switch 44 is switched to the second stage, the current of the power supply 54 is applied to the left / right joystick pushbuttons 46 and 48 to be in a standby state, and the driver may move the left / right side as needed. When the joystick pushbuttons 46 and 48 are selectively operated, power is selectively applied to the solenoids 50 and 52 of the solenoid package valves 32 and 34 to achieve an "on" state.

When the solenoid package valves 32 and 34 are selectively turned on, the pilot pressure oil transmitted through the pilot line 30 is transferred to the option pilot line through the solenoid package valves 32 and 34 and the shuttle valves 6 and 38. And the pressure oil supplied from the main pump 4 while the spool 28 of the control valve 26 is selectively switched according to the delivery direction of the pilot pressure oil. Through the outlet of (26) is introduced into the hydraulic motor 22a of the crusher, which is an optional work machine 22, to be rotated in the selected rotational direction.

As described above, the present invention installs the solenoid package valves 32 and 34 and the shuttle valves 36 and 38 in the middle of the pilot line 30 connected to the option control valve 26 for controlling the optional work machine 22. A hydraulic pedal valve 42 is connected to the shuttle valves 36 and 38 via a solenoid valve 40 for selection control, while the solenoids 50 and 52 of the solenoid package valves 32 and 34 are connected to the left and right sides. While connecting the joystick pushbuttons 46 and 46, the power source 54 is connected to the solenoid 40a of the selection control solenoid valve 40 and the left / right joystick pushbuttons 46 and 48 via the selector switch 44. By additionally installing a device having a structure of connecting the switch, the operator operates the hydraulic pedal 42 by switching the selection switch 44 or by using the left and right joystick pushbuttons 46 and 48 as an optional work tool 22. Capable of actuating rotary hydraulic motors (22a) to be.

As described above, the apparatus according to the present invention, the selection switch 44 for controlling the connection of the power supply 54 to the pilot line 30 of the control valve of the optional work machine 22 and the solenoid valve 40 for the selection control. By connecting the mechanical hydraulic pedal 42 and the joystick pushbuttons 46 and 48 in parallel, the driver can easily switch and select as needed, so the option can be operated in both directions without any additional work. The work machine 22 can be used by selecting a mechanical or electrical control method.

Therefore, by using the device according to the present invention, it is possible to reduce the occurrence of errors in the production of the pre-order method, to cope with the customer's requirements with the integrated specification, and to expand the use of various attachments in the multifunctional form, According to the error of the installation, removal cost can be reduced and the cost of logistics for changing the specifications can be reduced.

Claims (4)

  1. The actuator control spool of any one of the actuators of the optional work tool 22 formed of at least two actuators is installed in the main control valve 6, and the other actuator control spool is different from the main control valve 6. In the optional work machine control device of an excavator having an optional control valve 26 additionally installed,
    A pilot pump (20) for providing pilot pressure oil to both hydraulic parts of the option control valve (26);
    A pilot line (30) connecting the pilot pump (20) and both hydraulic parts;
    Electrical operation means including a solenoid package valve (32, 34) installed on the pilot line (30) to receive the pilot pressure oil;
    Hydraulic operation means installed on the pilot line 30 receives the pilot pressure oil;
    Shuttle valve 36 which is connected to both ends of the electric operation means and the hydraulic operation means and supplies pilot pressure oil supplied from one of the electric operation means and the hydraulic operation means to both hydraulic parts of the option control spool 26; 38); And
    Selection means for selecting one of the electric operation means and the hydraulic operation means to operate; Optional work machine control device of the excavator comprising a.
  2. The method of claim 1,
    The selection means,
    A solenoid switching valve for selection control (40) installed on a flow path connecting the hydraulic operation means and both hydraulic parts of the option control valve (26) to open and close the flow path; And
    And an optional mechanical / electric control selector switch (44) for selectively applying power to the switching valve (40) or the electric operation means.
  3. 3. An optional work machine control device for an excavator according to claim 1 or 2, wherein said electric control means are left and right joystick pushbuttons (46,48).
  4. 3. An optional work machine control device according to claim 1 or 2, wherein the hydraulic operation means is a hydraulic pedal valve (42) operated in both directions.
KR1020040117892A 2004-12-31 2004-12-31 An apparatus for selectively controlling the option actuator in excavator KR101155705B1 (en)

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Application Number Priority Date Filing Date Title
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KR101155705B1 true KR101155705B1 (en) 2012-06-12

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101389581B1 (en) * 2007-07-13 2014-04-29 두산인프라코어 주식회사 Control apparatus for option attatchment of excavator
KR101045334B1 (en) * 2009-09-14 2011-06-30 볼보 컨스트럭션 이큅먼트 에이비 hydraulic system of control option attachment of excavator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001173024A (en) 1999-12-17 2001-06-26 Shin Caterpillar Mitsubishi Ltd Hybrid system for construction machine
KR20030058377A (en) * 2001-12-31 2003-07-07 대우종합기계 주식회사 apparatus for controlling hydraulic pumps in an excavator
KR20060078297A (en) * 2004-12-31 2006-07-05 두산인프라코어 주식회사 An apparatus for selectively controlling the option actuator in excavator
KR20070052592A (en) * 2005-11-17 2007-05-22 현대중공업 주식회사 Apparatus for controlling oil pressure of excavator breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001173024A (en) 1999-12-17 2001-06-26 Shin Caterpillar Mitsubishi Ltd Hybrid system for construction machine
KR20030058377A (en) * 2001-12-31 2003-07-07 대우종합기계 주식회사 apparatus for controlling hydraulic pumps in an excavator
KR20060078297A (en) * 2004-12-31 2006-07-05 두산인프라코어 주식회사 An apparatus for selectively controlling the option actuator in excavator
KR20070052592A (en) * 2005-11-17 2007-05-22 현대중공업 주식회사 Apparatus for controlling oil pressure of excavator breaker

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