KR20160133221A - Control apparatus and method for attachment of construction machinery - Google Patents

Abstract

The present invention relates to an apparatus for controlling attachment of a construction machine, and a method therefor. According to the present invention, the apparatus for controlling attachment of a construction machine comprises: at least two control means to control attachment; an input unit which is the control means to control the attachment to select one among the at least two control means; and a control unit activating one selected as the control means to control the attachment among the at least two control means and deactivating the other control means.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an attachment control device for a construction machine,

The present invention relates to an apparatus and method for controlling an attachment of a construction machine.

Generally, a construction machine such as an excavator is equipped with a front work unit such as a boom, an arm, and a bucket for performing work. Excavators generally perform excavation work using buckets. In addition to the excavation work, the attachment may be mounted in place of the bucket to perform a specific purpose. Attachments include breakers, crushers, and shears. The breaker is for crushing hard rocks and the like and can be operated by only one-way flow of operating oil. On the other hand, a crusher is for picking up a rigid object, a shear for cutting, and a two-way flow of hydraulic fluid is required for an attachment such as a crusher or shear to work.

On the other hand, the construction machine may be provided with two or more operating means of the attachment. However, if two or more operating means are operated simultaneously by mistake of the user, the construction machine may malfunction or fail.

In addition, when the user starts the construction machine by mistake or intentionally operating the operation means, the attachment is activated simultaneously with the start. In this case, a sudden load is applied to the hydraulic system not only degrades the durability of the hydraulic system but also poses a threat to the safety of the user and the people around the construction machine.

KR 10-2012-0000394 A

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the conventional art, and it is an object of the present invention to provide a construction machine capable of preventing attachment malfunctions and failures due to a user's operation error by operating an attachment only by one of a plurality of operation means for operating an attachment And an object of the present invention is to provide an attachment control device and a control method thereof.

Another object of the present invention is to provide an attachment control apparatus and control method for a construction machine in which an attachment is not actuated by the attachment operation means when the attachment operation means has been operated before activation.

In order to solve the above-mentioned problems, the present invention provides a control apparatus comprising at least two operating means for operating an attachment; An input unit for selecting any one of the at least two operation means as operating means for operating the attachment; And a control unit for activating any one of the at least two operating means selected as the operating means for operating the attachment and deactivating the remaining one of the operating means for operating the attachment.

At this time, the at least two operating means may include a first operating means and a second operating means.

In addition, when the first operating means is activated, the control section can output a control signal corresponding to the operating amount of the first operating means.

In addition, by supplying the operating oil to the second operating means, the second operating means can be activated.

In addition, the controller may deactivate all of the at least two operating means if it is determined that any one of the at least two operating means is abnormal.

In addition, the controller may deactivate all of the at least two operating means if it is determined that any one of the at least two operating means is operated before the operating means for operating the attachment is selected.

Further, the control unit may activate any one of the at least two operating means only when the attachment mode is activated.

The present invention also provides a construction machine comprising at least two operating means for operating an attachment,

Selecting either one of the at least two operating means as operating means for operating the attachment; And

And activating any one of the at least two operating means selected as the operating means for operating the attachment and deactivating the remaining one of the at least two operating means.

At this time, it may further include determining whether the attachment mode is activated, and deactivating all the at least two operation means if the attachment mode is determined not to be activated.

The method may further include the step of determining whether or not any one of the at least two operating means is operated and deactivating all of the at least two operating means if it is determined that any one of the at least two operating means is being operated can do.

The method may further include the step of determining whether or not any one of the at least two operating means has occurred and deactivating all of the at least two operating means if it is determined that any one of the at least two operating means has occurred .

The method may further include determining whether the cutoff valve is in the released state.

According to the embodiment of the present invention, since only one of the plurality of operation means for operating the attachment is activated by the user and the other is deactivated, the effect that the attachment can be prevented from malfunctioning due to the mistake of the user have.

Further, according to the embodiment of the present invention, since the attachment operation means is activated only in the attachment mode, the attachment can not be operated even if the operation means is operated in the attachment mode, thereby preventing malfunction of the construction machine.

Further, according to the embodiment of the present invention, when an abnormality occurs in the operation means before the attachment operation means is activated or the operation means is already operated, the attachment operation means is not activated, The stability of the construction machine is improved.

1 is a schematic view showing an attachment control apparatus for a construction machine according to an embodiment of the present invention and a hydraulic system including the same.
2 is a flowchart of a method of controlling an attachment of a construction machine according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a schematic view showing an attachment control apparatus for a construction machine according to an embodiment of the present invention and a hydraulic system including the same. Referring to FIG. 1, an attachment control apparatus for a construction machine according to an embodiment of the present invention and a hydraulic system including the same include at least two operation means 10, 20, a control unit 30, a hydraulic pump 40, Off valve 50, a pedal shutoff valve 60, an attachment actuator 70, a shuttle valve 80, and an input unit 90.

The hydraulic pump 40 is driven by a drive source such as an engine or a motor to discharge hydraulic oil. The hydraulic pump 40 may be a variable displacement pump such as a piston pump capable of adjusting the volume by adjusting the angle of inclination of the swash plate, or a fixed displacement pump whose volume is fixed, such as a gear pump. The hydraulic oil discharged from the hydraulic pump 40 may be supplied through the supply line 41. [

A cut-off valve 50 is provided on the supply line 41 to control the flow of hydraulic fluid. The cut-off valve 50 operates between a first position 50a for interrupting the flow path of the supply line 41 and a second position 50b for opening. When the cutoff valve 50 is switched to the first position 50a, the hydraulic fluid discharged from the hydraulic pump 40 is blocked from flowing through the supply line 41, and the hydraulic fluid in the supply line 41 is discharged to the tank . When the cut-off valve 50 is switched to the second position 50b, the hydraulic fluid discharged from the hydraulic pump 40 can flow through the supply line 41. [ Hereinafter, the cut-off valve 50 operates at the second position 50b so that the state in which the hydraulic oil discharged from the hydraulic pump 40 can flow through the supply line 41 is released from the cut- State.

The cut-off valve 50 may be a solenoid valve. When the cutoff valve 50 is a solenoid valve, the cutoff valve 50 can be operated by a cutoff valve change-over switch (not shown). Further, the cut-off valve 50 can be operated manually. When the cutoff valve 50 is a manual valve, the position of the cutoff valve 50 can be switched by operating the cutoff lever.

At least two operating means (10, 20) are operating means provided on the construction machine for operating the attachment. At least two of the operating means 10, 20 may be operating means in various manners. In this embodiment, at least two operating means 10, 20 are shown as including a first operating means 10 and a second operating means 20. However, three or more operating means 10, 20 may be provided.

The first operating means 10 may be a thumb wheel of the joystick. The first operating means 10 can output an operation signal corresponding to the manipulated variable when operated by the user. For example, the first operation means 10 can generate an operation signal by an operation of rolling the thumb wheel back and forth. The manipulation signal may be a voltage signal having a magnitude proportional to the manipulation amount of the thumb wheel. An operation signal of the first operation means 10 can be inputted to the control section 30. [ The attachment actuator 70 can be operated by an operation signal of the first operation means 10. [ At this time, when the first operating means 10 is an operating means for generating an electronic signal without generating the flow rate of the operating oil directly by the operation like the electronic thumb wheel, the operating means corresponding to the operating amount of the first operating means 10 A thumb wheel valve 12 may be provided to generate a flow rate of the operating oil. A pair of thumb wheel valves 12 may be provided. Each thumb wheel valve 12 may be connected to a thumb wheel line 42 connected to a supply line 41. The hydraulic fluid supplied through the supply line 41 may be supplied to the pair of thumb wheel valves 12 via the thumb wheel line 42, respectively. The thumb wheel valve 12 may be actuated by the control unit 30. [ A pair of thumb wheel valves 12 may be connected to the input ports of the pair of shuttle valves 80 through the thumb wheel output line 43, respectively. The control unit 30 does not operate the thumb wheel valve 12 even if the first operating means 10 is operated in a state in which the first operating means 10 is not activated. On the other hand, when the first operating means 10 is activated, the control section 30 operates the thumb wheel valve 12 in response to the operation of the first operating means 10. When the thumb wheel valve 12 is operated, the hydraulic oil supplied through the thumb wheel line 42 is output through one of the pair of thumb wheel output lines 43 and input to the shuttle valve 80.

The pedal line 45 connected to the supply line 41 may be connected to the second operating means 20. [ The operating fluid supplied through the supply line 41 may be supplied to the second operating means 20 through the pedal line 45. [ A pedal shutoff valve (60) may be provided on the pedal line (45). A pedal shutoff valve (60) is provided on the pedal line (45) to control the flow of hydraulic fluid. The pedal shutoff valve 60 operates between a first position 60a for blocking the flow path of the pedal line 45 and a second position 60b for opening. When the pedal shutoff valve 60 is switched to the first position 60a, the hydraulic fluid supplied from the supply line 41 is cut off from being supplied to the second operating means 20, and the hydraulic fluid of the pedal line 45 is supplied to the tank Can be drained. When the pedal shutoff valve 60 is switched to the second position 60b, the operating fluid supplied from the supply line 41 can be supplied to the second operating means 20. [ The pedal shutoff valve (60) may be a solenoid valve whose operation is controlled by the control section (30).

The second operating means 20 may be an attachment operation pedal. The second operating means 20 may include a pedal 22 and a pedal valve 24. [ A pedal line (45) may be connected to the pedal valve (24). When the pedal 22 is operated, the pedal valve 24 operates in conjunction with the pedal 22, so that the hydraulic fluid supplied through the pedal line 45 can be output through the pedal output line 46. At this time, if the pedal shutoff valve 60 is switched to the first position 60a and the operating oil is cut off, the operating oil is not output through the pedal output line 46 even if the pedal 22 is operated. The pedal output line 46 may be connected to the input port of the shuttle valve 80, respectively.

And a pressure sensor 26 may be provided on the pedal output line 46, respectively. The pressure sensor 26 measures the pressure of the pedal output line 46. The reason for measuring the pressure of the pedal output line 46 is to determine whether or not an abnormality has occurred in the second operating means 20 and whether or not the second operating means 20 has already been operated before selecting the attachment mode It is for this reason. The measured value of the pressure sensor 26 may be transmitted to the control unit 30 and the control unit 30 may determine whether the second operation means 20 is abnormal based on the measured value of the pressure sensor 26, It is possible to judge whether or not the operation unit 20 is operated.

A pair of shuttle valves 80 may be provided and a thumb wheel output line 43 and a pedal output line 46 may be connected to input ports of each shuttle valve 80. The hydraulic fluid of the higher pressure of the hydraulic fluid input to the shuttle valve 80 through the thumb wheel output line 43 and the hydraulic fluid input to the shuttle valve 80 through the pedal output line 46 is supplied to the output of the shuttle valve 80 Lt; / RTI > port. The output port of the shuttle valve 80 may be connected to the attachment actuator 70 via the shuttle output line 48.

The attachment actuator 70 may be actuated by operating fluid supplied through the shuttle output line 48. The attachment actuator 70 may be a one-way or two-way actuator. Further, the attachment actuator 70 may be a linear type actuator such as a hydraulic cylinder, or a rotary type actuator such as a hydraulic motor. The attachment actuated by the attachment actuator 70 can be of various kinds depending on the purpose of the operation.

The input unit 90 is for activating the attachment mode and selecting the operation means to be activated. The input unit 90 may be implemented in various forms such as a touch screen, a toggle button, and a dial switch. When the user operates the input unit 90 to select the attachment mode, it is transmitted to the control unit 30. Thereafter, when the user selects the operation means to be activated through the input unit 90, the corresponding operation means is activated. When the operating means is activated, the attachment actuator 70 is operated in response to the operation of the operating means. On the other hand, when the operating means is deactivated, the attachment actuator 70 is not operated even if the operating means is operated. The control unit 30 may not activate any of the operation means 10 and 20 unless the attachment mode is activated, that is, the attachment mode is not selected by the user. Also, the control unit 30 may not activate the remainder other than the operation means selected by the user.

The control section 30 can activate and deactivate the operating means by the following method.

First, in the case of the first operating means 10 that can be implemented with the thumb wheel of the joystick, the control unit 30 can not operate the first operating means 10 even if the first operating means 10 is operated and the operating signal is transmitted to the control unit 30 And does not output a control signal to the wheel valve 12. Accordingly, since the thumb wheel valve 12 is not operated, the operating oil is not supplied to the attachment actuator 70, and as a result, the attachment actuator 70 is not operated. On the other hand, when the first operation means 10 is activated and the first operation means 10 is operated and an operation signal is transmitted to the control portion 30, the control portion 30 transmits a corresponding control signal to the thumb wheel 12 . The thumb wheel valve 12 is operated by the control signal so that the hydraulic oil is supplied to the attachment actuator 70 via the shuttle valve 80. [ Thus, the attachment actuator 70 is actuated.

The control unit 30 switches the pedal shutoff valve 60 to the first position 60a and supplies the pedal shutoff valve 60 to the pedal line 45 in the deactivated state of the second operating means 20, Thereby cutting off the working fluid. In this case, even if the pedal 22 is operated and the pedal valve 24 is opened, the hydraulic fluid is not supplied to the pedal valve 24, so that the hydraulic fluid is not output from the pedal valve 24. As a result, the attachment actuator 70 is not supplied with the operating fluid, so that the attachment actuator 70 is not operated. On the other hand, when the second operating means 20 is activated, the control unit 30 switches the pedal shutoff valve 60 to the second position 60b. Accordingly, the operating fluid can be supplied to the pedal valve 24 through the pedal line 45, and when the pedal 22 is operated in this state, the operating fluid is output through the pedal valve 24. The hydraulic fluid output from the pedal valve 24 is supplied to the attachment actuator 70 through the shuttle valve 80 so that the attachment actuator 70 can be operated.

Hereinafter, an attachment control method of the construction machine according to the present embodiment will be described with reference to the above-described components.

2 is a flowchart of a method of controlling an attachment of a construction machine according to an embodiment of the present invention.

2, a method of controlling an attachment of a construction machine according to an embodiment of the present invention includes a step (S60) of selecting any one of at least two operation means (10, 20) as operating means for operating an attachment, , And activating at least one of the at least two operating means (10, 20) as the operating means for operating the attachment, and deactivating the other (S70). In addition, the method of controlling an attachment of a construction machine according to an embodiment of the present invention is characterized in that, prior to step (S60) of selecting any one of at least two operation means (10, 20) as operating means for operating an attachment, (S10) judging whether or not the valve (50) is in the released state, (S20) judging whether or not any one of at least two operating means (10, 20) 10, 20) is operated (S40), and determining whether or not the attachment mode is activated (S50). In this case, the order of steps S10, S20, S40, and S50 is not limited to the order shown in FIG. 2, and the order may be changed as necessary.

First, the control unit 30 can determine whether the cut-off valve 50 is in the released state. If the cut-off valve 50 is not in the released state, even if the operating means 10, 20 is operated, the operating oil can not be supplied to the attachment actuator 70, .

On the other hand, there is a high possibility that the attachment actuator 70 can not be operated properly if an abnormality occurs in the operating means 10, 20. Therefore, it is possible to judge whether or not any one of the at least two operating means 10, 20 has occurred. If any of the at least two operating means 10, 20 is abnormal, the operating means 10, (S30).

The determination of whether or not an abnormality has occurred in the operating means 10, 20 can be performed by the following method. The first operating means 10, which can be implemented with a thumb wheel of the joystick, can output a voltage signal of 1V to 4V as an operation signal according to the operation amount. Therefore, when the operation signal of the first operation means 10 is less than 1 V or exceeds 4 V, it can be determined that an abnormality has occurred in the first operation means 10.

Further, the second operating means 20, which can be embodied as an attachment operating pedal, does not supply operating oil to the pedal output line 46 when the pedal 22 is not operated, so that the measured value of the pressure sensor 26 is 0 . However, when an abnormality occurs in the second operating means 20, operating fluid may be supplied to the pedal output line 46 to form a pressure, in which case the measured value of the pressure sensor 26 may not be zero. Therefore, when the measured value of the pressure sensor 26 is not 0, it can be determined that an abnormality has occurred in the second operating means 20. [

On the other hand, the attachment actuator 70 can suddenly operate suddenly when the operation means 10, 20 is activated while the user is operating the operation means 10, 20 intentionally or inadvertently. In this case, the load is suddenly applied to the attachment actuator 70, so that the attachment actuator 70 may be damaged, and sudden operation of the construction machine may pose a risk to the safety of the user or the surrounding people. It is therefore preferable that the operating means 10 and 20 are not activated when the operating means 10 and 20 have already been operated before the operating means 10 and 20 are activated.

The attachment control method of a construction machine according to an embodiment of the present invention determines whether at least one of the at least two operation means 10 and 20 is operated (S40), and at least two operation means 10 and 20 , It is possible to deactivate at least both of the operating means 10 and 20 (S30).

The determination as to whether or not the operating means 10, 20 is being operated can be performed by the following method. The first operating means 10, which can be implemented with a thumb wheel of a joystick, can generate a voltage signal of 2.2 to 2.7 V in an unoperated neutral state. Therefore, when an operation signal of less than 2.2 V or exceeding 2.7 V is inputted to the control section 30, the control section 30 can judge that the first operation means 10 is being operated.

Further, the second operating means 20, which can be embodied as an attachment operating pedal, does not supply operating oil to the pedal output line 46 when the pedal 22 is not operated, so that the measured value of the pressure sensor 26 is 0 . Therefore, when the measured value of the pressure sensor 26 is not 0, it can be judged that the second operation means 20 is being operated.

On the other hand, when the attachment operation means 10 and 20 are activated despite the attachment mode is not activated, the construction machine may malfunction if the operation means 10 and 20 are mistakenly operated by the user. Accordingly, it is determined whether or not the attachment mode is activated (S50). If the attachment mode is not activated, all of the operation means 10 and 20 are deactivated, thereby preventing malfunction of the construction machine. The user can select through the input 90 to operate the construction machine in the attachment mode. When the attachment mode is selected by the user, the selection result may be transmitted to the control unit 30, and based on the selection result, the control unit 30 may determine whether or not the attachment mode is activated. At this time, if it is determined that the attachment mode is not activated, all of the operation means 10 and 20 can be deactivated.

The user can select the operation means to be used as the operation means for operating the attachment through the input unit 90 (S60). The selection result of the user can be transmitted to the control unit 30, and the control unit 30 can activate the operation means selected by the user and deactivate the operation means not selected. Accordingly, even if two or more of the plurality of attachment manipulation means provided on the construction machine are simultaneously manipulated, the attachment is operated only by one manipulation means selected by the user, thereby preventing the attachment from malfunctioning due to the mistake of the user.

For example, when the user selects the first operating means 10 as the operating means, the control unit 30 switches the pedal shutoff valve 60 to the first position 60a and supplies operating oil to the second operating means 20 . In this case, the user can operate the attachment by operating the first operating means 10, and even if the user mistakenly or intentionally operates the second operating means 20, the operating oil is not output from the pedal valve 24, 2 operation of the operating means 20 does not affect the operation of the attachment actuator 70. [

On the other hand, when the user selects the second operating means 20 as the operating means, the control section 30 switches the pedal shutoff valve 60 to the second position 60b and the operating oil is supplied to the second operating means 20 To be supplied. In this case, when the user operates the second operating means 20, the operating oil is supplied from the pedal valve 24 to the attachment actuator 70, so that the attachment can be controlled by the second operating means 20. [ At this time, even if the user accidentally or intentionally operates the first operating means 10, the control unit 30 does not output the control signal to the thumb wheel valve 12, so that the operation of the first operating means 10 is controlled by the attachment actuator 70).

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. . Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: first operating means 12: thumb wheel valve
20: second operating means 22: pedal
24: Pedal valve 26: Pressure sensor
30: control unit 40: hydraulic pump
41: supply line 42: thumb wheel line
43: thumb wheel output line 45: pedal line
46: Pedal output line 48: Shuttle output line
50: Cutoff valve 60: Pedal shutoff valve
70: Attachment actuator 80: Shuttle valve
90:

Claims (12)

At least two operating means for operating the attachment;
An input unit for selecting any one of the at least two operation means as operating means for operating the attachment; And
And a control unit for activating any one of the at least two operating means selected by the operating means for operating the attachment and deactivating the remaining one of the at least two operating means. The method according to claim 1,
Wherein the at least two operating means include a first operating means and a second operating means. 3. The method of claim 2,
Wherein the control unit outputs a control signal corresponding to an operation amount of the first operation unit when the first operation unit is activated. 3. The method of claim 2,
And the second operating means is activated by supplying operating oil to the second operating means. The method according to claim 1,
Wherein the control unit deactivates all of the at least two operating means when it is determined that any one of the at least two operating means is abnormal. The method according to claim 1,
Wherein the control unit deactivates all of the at least two operation means when it is determined that any one of the at least two operation means is operated before the operation means for operating the attachment is selected. The method according to claim 1,
Wherein the control unit activates any one of the at least two operating means only when the attachment mode is activated. A construction machine comprising at least two operating means for operating an attachment,
Selecting either one of the at least two operating means as operating means for operating the attachment; And
And activating any one of the at least two operating means selected as the operating means for operating the attachment and deactivating the other. 9. The method of claim 8,
Further comprising the step of determining whether the attachment mode is activated and deactivating all of the at least two operation means if it is determined that the attachment mode is not activated. 9. The method of claim 8,
Further comprising the step of determining whether any one of the at least two operating means is operated and deactivating all of the at least two operating means if it is determined that any one of the at least two operating means is being operated A method of controlling an attachment of a machine. 9. The method of claim 8,
Further comprising the step of determining whether or not any one of the at least two operating means has occurred and deactivating all of the at least two operating means if it is determined that any one of the at least two operating means has occurred A method of controlling an attachment of a construction machine. 9. The method of claim 8,
Further comprising the step of determining whether the cut-off valve is in the released state.

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