CN111675102A - Emergency drive system for construction machine - Google Patents
Emergency drive system for construction machine Download PDFInfo
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- CN111675102A CN111675102A CN202010166453.7A CN202010166453A CN111675102A CN 111675102 A CN111675102 A CN 111675102A CN 202010166453 A CN202010166453 A CN 202010166453A CN 111675102 A CN111675102 A CN 111675102A
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- 238000010276 construction Methods 0.000 title claims abstract description 45
- 239000007858 starting material Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000005856 abnormality Effects 0.000 description 9
- 239000000470 constituent Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/22—Control systems or devices for electric drives
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- 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
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2062—Control of propulsion units
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
- E02F9/24—Safety devices, e.g. for preventing overload
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The present invention relates to an emergency drive system for a construction machine, which is capable of performing emergency start and emergency operation, the emergency drive system including: an electronic hydraulic pump for operating a plurality of working machines; a vehicle control device that outputs a control signal for the electronic hydraulic pump based on a plurality of work machine operation signals; an electronic proportional valve for controlling the electronic hydraulic pump; and an emergency operation drive selection input unit that bypasses the vehicle control device and outputs a preset electric signal to the electronic proportional valve.
Description
Technical Field
The present invention relates to a construction machine, and more particularly to an emergency drive system for a construction machine capable of emergency start and emergency operation.
Background
A construction machine such as an excavator, a wheel loader, or the like generally includes a hydraulic pump driven by an engine and a hydraulic system that drives a plurality of working machines such as a boom, an arm, a bucket, and a travel motor, a swing motor, or the like by the pressure of hydraulic oil discharged from the hydraulic pump.
However, in the case of a construction machine using an electronic hydraulic pump, when an abnormality occurs in a vehicle control Unit (vehicleltrol Unit), the construction machine may not be started even if a start switch is normally operated.
Disclosure of Invention
Technical problem
An object of the present invention is to provide an emergency drive system for a construction machine, which is capable of performing emergency start and emergency operation.
Technical scheme
The emergency drive system of a construction machine according to the present invention for achieving the above object includes: an electronic hydraulic pump for operating a plurality of working machines; a vehicle control device that outputs a control signal for the electronic hydraulic pump based on a plurality of work machine operation signals; an electronic proportional valve for controlling the electronic hydraulic pump; and an emergency operation drive selection input unit that bypasses the vehicle control device and outputs a preset electric signal to the electronic proportional valve.
The emergency work drive selection input unit includes: a plurality of resistors that output electrical signals different from each other; and an operation mode selection input unit that selectively connects any one of the plurality of resistors in accordance with an operation by an operator.
The emergency work drive selection input unit further includes: and an emergency mode selection input unit that bypasses the vehicle control device according to an operation of an operator and outputs an electric signal output from the resistor connected to the operation mode selection input unit to the electronic proportional valve.
The emergency mode selection input portion includes an auxiliary mode switch connected to the vehicle control device, the operation mode selection input portion includes an auxiliary mode selection switch connected to the vehicle control device, the electronic proportional valve includes a first control valve, a second control valve, and a travel straight control valve connected to the auxiliary mode switch, and the plurality of resistors include a first operation mode resistor, a second operation mode resistor, a first travel mode resistor, and a second travel mode resistor connected to the auxiliary mode selection switch.
The emergency drive system of a construction machine further includes: an auxiliary mode relay connected to the auxiliary mode selection switch.
In the emergency driving system of the construction machine, when the auxiliary mode switch is switched to the driving mode and the auxiliary mode selection switch is switched to the working mode, a predetermined current is supplied to the first control valve and the second control valve according to the first working mode resistor and the second working mode resistor.
In the emergency drive system of the construction machine, when the assist mode switch is switched to the drive mode and the assist mode selection switch is switched to the travel mode, a predetermined current is supplied to the second control valve and the travel straight control valve based on the first travel mode resistor and the second travel mode resistor.
The auxiliary mode switch includes: a first auxiliary mode switch connected to one terminal of the first control valve and selectively connected to one of the vehicle control device and an auxiliary mode selection switch; a second auxiliary mode switch connected to the other terminal of the first control valve and selectively connected to one of the vehicle control device and a ground terminal; a third auxiliary mode switch connected to one terminal of the second control valve and selectively connected to one of the vehicle running device and the auxiliary mode selection switch; and a fourth auxiliary mode switch connected to the other terminal of the second control valve and selectively connected to one of the vehicle traveling device and a ground terminal.
The auxiliary mode selection switch includes: a first auxiliary mode selection switch connected to the auxiliary mode switch and selectively connected to one of the first operation mode resistor and the first travel mode resistor; a second auxiliary mode selection switch connected to the auxiliary mode switch and selectively connected to one of the second operation mode resistor and the auxiliary mode relay; a third auxiliary mode selection switch connected to one terminal of the traveling straight control valve and selectively connected to one of the vehicle control device and the second traveling mode resistor; and a fourth auxiliary mode selection switch connected to the other terminal of the traveling straight control valve and selectively connected to one of the vehicle control device and a ground terminal.
The emergency drive system of a construction machine further includes: an electronic control device connected to the vehicle control device; starting the motor; a starting switch connected between the starting motor and the battery; a start control switch controlled by the electronic control device and connected between the battery and the start switch; and an emergency start mode switch connected between the battery and a control terminal of the start switch.
The emergency starting mode switch is directly connected to the control terminal of the starting switch.
The emergency drive system of a construction machine further includes: and a power supply control unit connected between the battery and the emergency start mode switch.
The emergency drive system of a construction machine further includes: a warning lamp which operates when the emergency start mode switch is turned on.
ADVANTAGEOUS EFFECTS OF INVENTION
The emergency driving system of the construction machine of the invention can perform emergency starting and emergency operation.
Drawings
Fig. 1 is a block diagram showing the configuration of an emergency drive system of a construction machine according to an embodiment of the present invention.
Fig. 2 is a diagram showing an emergency start mode switch, an auxiliary mode switch, and an auxiliary mode selection switch provided in an emergency drive system of a construction machine according to an embodiment of the present invention.
Fig. 3 is a diagram for explaining a circuit arrangement between the emergency start mode switch and peripheral components in fig. 2.
Fig. 4 is a detailed configuration diagram of the auxiliary mode switch and the auxiliary mode selection switch of fig. 2.
Fig. 5 is a sequence diagram for explaining a driving method of an emergency driving system of a construction machine according to an embodiment of the present invention.
Description of the symbols
11: resistor, 13: operation mode selection input unit, 12: emergency mode selection input, 401: first operation mode resistor, 402: second operation mode resistor, 501: first travel mode resistor, 502: a second travel mode resistor.
Detailed Description
Advantages and features of the present invention, and methods of accomplishing the same, will become apparent from the following detailed description of the embodiments when considered in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms different from each other, and the embodiments are provided only to make the disclosure of the present invention complete and to inform the scope of the invention to those skilled in the art to which the present invention pertains more completely, and the present invention is defined only by the claims. Accordingly, in several embodiments, well known process steps, well known device structures, and well known techniques have not been described in detail in order to avoid unnecessarily obscuring the present invention. Throughout the specification, the same reference numerals refer to the same constituent elements.
The thicknesses are exaggerated and illustrated in order to clearly express various layers and regions in the drawings. Throughout the specification, the same reference numerals are used for similar parts. When a layer, a film, a region, a plate, or the like is referred to as being "over" another portion, this includes not only a case where it is "directly over" another portion but also a case where another portion exists in the middle thereof. Conversely, when a portion is referred to as being "directly over" another portion, it means that there is no other portion in between. Further, when a layer, a film, a region, a plate, or the like is referred to as being located "under" another portion, this includes not only a case where it is located "directly under" another portion but also a case where another portion is present in the middle thereof. Conversely, when a portion is referred to as being "directly below" another portion, it means that no other portion is present in the middle.
Spatially relative terms "below", "lower", "above", "upper", and the like may be used as illustrated in the figures to facilitate describing a relationship of an element or constituent to another element or constituent. Spatially relative terms are to be understood as including terms of orientation relative to each other in use or in action, in addition to the orientation illustrated in the figures. For example, when an element illustrated in the drawings is turned over (turned over), an element described as being located "below" or "beneath" another element may be located "above" the other element. Thus, the exemplary term "lower" can include both an upper and lower direction. Elements may also be oriented in other directions and the spatially relative terms may be interpreted according to the orientation.
In this specification, when a part is referred to as being "connected" to another part, this includes not only a case of direct connection but also a case of electrical connection with another element interposed therebetween. Further, when it is mentioned that a part includes a certain constituent element, unless otherwise stated to the contrary, it means that another constituent element may be included without excluding another constituent element.
In the present specification, the terms first, second, third, and the like may be used to describe various components, but these components should not be limited by these terms. These terms are only used to distinguish one constituent element from another constituent element. For example, a first component may be named a second or third component, and similarly, a second or third component may be named interchangeably, without departing from the scope of the present invention.
Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings commonly understood by one of ordinary skill in the art to which the present invention belongs. Also, terms commonly used in dictionaries are not interpreted ideally or excessively unless expressly defined otherwise.
The emergency drive system of the construction machine according to the present invention will be described in detail with reference to fig. 1 to 5.
Fig. 1 is a block diagram showing the configuration of an emergency drive system of a construction machine according to an embodiment of the present invention.
As illustrated in fig. 1, the emergency driving system of a construction machine (e.g., excavator) of the present invention may include an emergency work driving selection input part 1000.
The emergency operation drive selection input unit 1000 changes a transmission path of a control signal to the electronic proportional valve. That is, when the vehicle control device cannot be activated, the operator operates the emergency work drive selection input unit 1000 to output a preset electric signal to the electronic proportional valve without using the vehicle control device, so that the electronic hydraulic pump of the construction machine can be temporarily driven. In other words, the emergency operation drive selection input unit 1000 bypasses the vehicle control device and outputs a preset electric signal to the electronic proportional valve. The electronic proportional valve controls the electronic hydraulic pump.
The electronic proportional valve may include, for example, a first valve, a second control valve, and a travel straight control valve to be described later.
Such an emergency operation drive selection input unit 1000 may include a resistor 11, an operation mode selection input unit 13, and an emergency mode selection input unit 12.
The resistor 11 may include a plurality of resistors that output electrical signals different from each other. For example, the resistors may include a first operation mode resistor 401, a second operation mode resistor 402, a first travel mode resistor 501, and a second travel mode resistor 502 to be described later.
The operation mode selection input unit 13 selectively connects at least one of the plurality of resistors in accordance with an operation by an operator. Such an operation mode selection input unit 13 may include, for example, an auxiliary mode selection switch to be described later.
The emergency mode selection input unit 12 bypasses the vehicle control device according to an operation by an operator, and outputs an electric signal output from the resistor connected through the operation mode selection input unit 13 to the electronic proportional valve. Such an emergency mode selection input 12 may include, for example, an auxiliary mode switch to be described later.
On the other hand, the emergency drive system for a construction machine according to the present invention includes a plurality of working machines that are operated by an electric hydraulic pump. Further, the vehicle control device for a construction machine according to the present invention outputs a control signal for the electronic hydraulic pump based on the work machine operation signal.
Fig. 2 is a diagram showing an emergency start mode switch, an auxiliary mode switch, and an auxiliary mode selection switch of an emergency drive system provided in a construction machine according to an embodiment of the present invention, fig. 3 is a diagram for explaining a circuit arrangement between the emergency start mode switch and peripheral components in fig. 2, and fig. 4 is a detailed diagram of the auxiliary mode switch and the auxiliary mode selection switch in fig. 2.
As illustrated in fig. 2 to 4, the emergency drive system of a construction machine according to an embodiment of the present invention includes an emergency start mode switch 110, an auxiliary mode switch 120, an auxiliary mode selection switch 130, a battery 30, a first breaker 201, a second breaker 202, a power supply control unit 170, a start control switch 180, a start switch 190, an electronic control device 140, a vehicle control device 150, a start motor 160, a first control valve 301, a second control valve 302, a travel direct travel control valve 303, a first operation mode resistor 401, a second operation mode resistor 402, a first travel mode resistor 501, a second travel mode resistor 502, and an auxiliary mode relay 600. Here, the power supply control unit 170 includes a first power control switch 171 and a second power control switch 172.
The first circuit breaker 201 is connected between the battery 30 and the electronic control device 140.
The second circuit breaker 202 is connected between the battery 30 and the first power control switch 171.
The first power control switch 171 is connected between the second circuit breaker 202 and the second power control switch 172.
The second power control switch 172 is connected between the first power control switch 171 and the electronic control device 140. At this time, the contact between the second power control switch 172 and the first power control switch 171 is connected to the electronic control device 140.
The start control switch 180 is connected between the battery 30 and the start switch 190. At this time, the control terminal of the start control switch 180 is connected to the electronic control device 140. The start control switch 180 may be a relay switch.
The starter switch 190 is connected between the battery 30 and the starter motor 160. At this time, the control terminal of the start switch 190 is connected to the start control switch 180 and the ground terminal. The start switch 190 may be a relay switch.
One terminal of the starter motor 160 is connected to the starter control switch 180, and the other terminal of the starter motor 160 is connected to the ground terminal.
One terminal of the emergency start mode switch 110 is connected to the battery 30 via the second power control switch 172, the first power control switch 171, and the second circuit breaker 202. The other terminal of the emergency start mode switch 110 is connected to the control terminal of the start switch 190. In other words, the emergency start mode switch 110 is connected between the battery 30 and the control terminal of the start switch 190. The contact between the emergency start mode switch 110 and the second power control switch 172 is connected to the electronic control device 140.
The vehicle control device 150 is connected to the electronic control device 140. The vehicle control device 150 outputs a start signal when the start switch 190 (or start button) is turned on (on). When the start switch 190 is turned on, the first power control switch 171 and the second power control switch 172 are turned on.
The start signal is supplied to the electronic control device 140. In addition, the electronic control device 140 receives the voltage of the battery 30 through the first power control switch 171 and the second power control switch 172, which are turned on in response to the activation signal. The second power control switch 172 is turned on after the first power control switch 171 is turned on. The first power control switch 171 and the second power control switch 172 are simultaneously maintained in an open state for a certain time.
The electronic control device 140 turns on the start control switch 180 according to the start signal. The voltage of the battery 30 is supplied to the control terminal of the start switch 190 through the opened start control switch 180. Thus, the start switch 190 is turned on, and the voltage of the battery 30 is supplied to the starter motor 160 through the turned-on start switch 190. As a result, the starter motor 160 operates to rotate the engine of the construction machine.
On the other hand, when an abnormality occurs in the vehicle control device 150, the start signal is not output from the vehicle control device 150 even when the start switch 190 is turned on. However, when the start switch 190 is turned on, the first power control switch 171 and the second power control switch 172 are turned on. In this case, the electronic control device 140 does not turn on the start control switch 180. That is, when an abnormality occurs in the vehicle control device 150, the start control switch 180 is not turned on even when the start switch 190 is turned on. Accordingly, the starter switch 190 is not turned on, and the starter motor 160 does not operate. In other words, when an abnormality occurs in the vehicle control device 150, the engine of the construction machine does not rotate even when the start switch 190 is turned on.
However, even in the event of an abnormality in the vehicle control device 150, the starter motor 160 can be operated by the emergency start mode switch 110. To this end, the emergency start mode switch 110 is directly connected to the start switch 190. When the emergency start mode switch 110 is turned on, the voltage of the battery 30 is directly supplied to the control terminal of the start switch 190 through the turned-on first power control switch 171 and the turned-on second power control switch 172. Thereby, the start switch 190 can be opened. In this way, the starter motor 160 can be operated so that the engine of the construction machine can be rotated. The emergency start mode switch 110 may be manually turned on by an operator. For example, the emergency start mode switch 110 may be turned on when the operator directly manually pulls the emergency start mode switch 110 upward, and the emergency start mode switch 110 may be turned off when the operator directly manually pulls the emergency start mode switch 110 downward.
The first control valve 301, the second control valve 302, and the traveling straight control valve 303 control the flow of the hydraulic oil discharged from the electronic hydraulic pump. A part (for example, at least one of a boom, an arm, and a bucket) of a working machine (for example, an excavator) is driven by hydraulic oil supplied from the first control valve 301 and the second control valve 302, and a travel motor in the working machine of the working machine is driven by hydraulic oil supplied from the travel straight control valve 303.
The assist mode switch 120 and the assist mode selection switch 130 control operations of the first control valve 301, the second control valve 302, and the traveling straight control valve 303. For example, when the assist mode switch 120 is switched to the drive mode and the assist mode selection switch 130 is switched to the operation mode, the current is supplied to the first control valve 301 and the second control valve 302, but the current is not supplied to the traveling straight control valve 303. On the other hand, when the assist mode switch 120 is switched to the drive mode and the assist mode selection switch 130 is switched to the travel mode, the current is supplied to the second control valve 302 and the travel direct control valve 303, but the current is not supplied to the first control valve 301. On the other hand, when the assist mode switch 120 is switched to the non-drive mode, the first control valve 301 and the second control valve 302 are controlled by the vehicle control device 150. When the assist mode switch 120 is switched to the non-drive mode, no current is supplied to the traveling direct control valve 303 regardless of the selection mode of the assist mode selection switch 130. The auxiliary mode switch 120 and the auxiliary mode selection switch 130 may be manually operated by an operator. For example, when the operator directly manually pulls the auxiliary mode switch 120 upward, the auxiliary mode switch 120 is switched to the non-driving mode, when the operator directly manually pulls the auxiliary mode switch 120 downward, the auxiliary mode switch 120 is switched to the driving mode, when the operator directly manually pulls the auxiliary mode selection switch 130 upward, the auxiliary mode selection switch 130 is switched to the working mode, and when the operator directly manually pulls the auxiliary mode selection switch 130 downward, the auxiliary mode selection switch 130 is switched to the driving mode.
As illustrated in fig. 3, the auxiliary mode switch 120 includes a first auxiliary mode switch 121, a second auxiliary mode switch 122, a third auxiliary mode switch 123, and a fourth auxiliary mode switch 124. When the auxiliary mode switch 120 is switched to the non-driving mode, the first to fourth auxiliary mode switches 121 to 124 are all switched to the non-driving mode, and when the auxiliary mode switch 120 is switched to the driving mode, the first to fourth auxiliary mode switches 121 to 124 are all switched to the driving mode.
One terminal of the first auxiliary mode switch 121 is connected to one terminal of the first control valve 301, and the other terminal of the first auxiliary mode switch 121 is selectively connected to one of the vehicle control device 150 and the auxiliary mode selection switch 130. For example, when the first auxiliary mode switch 121 is converted into the non-driving mode, the other terminal of the first auxiliary mode switch 121 is connected to the vehicle control device 150, and when the first auxiliary mode switch 121 is converted into the driving mode, the other terminal of the first auxiliary mode switch 121 is connected to one terminal of the second auxiliary mode selection switch 132 included in the auxiliary mode selection switch 130.
One terminal of the second auxiliary mode switch 122 is connected to the other terminal of the first control valve 301, and the other terminal of the second auxiliary mode switch 122 is selectively connected to either the vehicle control device 150 or the ground terminal. For example, when the second auxiliary mode switch 122 is switched to the non-driving mode, the other terminal of the second auxiliary mode switch 122 is connected to the vehicle control device 150, and when the second auxiliary mode switch 122 is switched to the driving mode, the other terminal of the second auxiliary mode switch 122 is connected to the ground terminal.
One terminal of the third auxiliary mode switch 123 is connected to one terminal of the second control valve 302, and the other terminal of the third auxiliary mode switch 123 is selectively connected to one of the vehicle control device 150 and the auxiliary mode selection switch 130. For example, when the third auxiliary mode switch 123 is converted into the non-driving mode, the other terminal of the third auxiliary mode switch 123 is connected to the vehicle control device 150, and when the third auxiliary mode switch 123 is converted into the driving mode, the other terminal of the third auxiliary mode switch 123 is connected to one terminal of the first auxiliary mode selection switch 131 included in the auxiliary mode selection switch 130.
One terminal of the fourth auxiliary mode switch 124 is connected to the other terminal of the second control valve 302, and the other terminal of the fourth auxiliary mode switch 124 is selectively connected to either the vehicle control device 150 or the ground terminal. For example, when the fourth auxiliary mode switch 124 is converted into the non-driving mode, the other terminal of the fourth auxiliary mode switch 124 is connected to the vehicle control device 150, and when the fourth auxiliary mode switch 124 is converted into the driving mode, the other terminal of the fourth auxiliary mode switch 124 is connected to the ground terminal.
As illustrated in fig. 3, the auxiliary mode selection switch 130 includes a first auxiliary mode selection switch 131, a second auxiliary mode selection switch 132, a third auxiliary mode selection switch 133, and a fourth auxiliary mode selection switch 134. When the assist mode selection switch 130 is switched to the operation mode, the first to fourth assist mode selection switches 131, 132, 133, 134 are all switched to the operation mode, and when the assist mode selection switch 130 is switched to the travel mode, the first to fourth assist mode selection switches 131, 132, 133, 134 are all switched to the travel mode.
One terminal of the first auxiliary mode selection switch 131 is connected to the auxiliary mode switch 120, and the other terminal of the first auxiliary mode selection switch 131 is selectively connected to one of the first working mode resistor 401 and the first travel mode resistor 501. For example, when the first auxiliary mode selection switch 131 is converted into the operation mode, the other side terminal of the first auxiliary mode selection switch 131 is connected to the first operation mode resistor 401, and when the first auxiliary mode selection switch 131 is converted into the travel mode, the other side terminal of the first auxiliary mode selection switch 131 is connected to the first travel mode resistor 501. On the other hand, one terminal of the first auxiliary mode selection switch 131 may be connected to the other terminal of the third auxiliary mode switch 123 based on the operation of the third auxiliary mode switch 123 included in the auxiliary mode switch 120.
One terminal of the second auxiliary mode selection switch 132 is connected to the auxiliary mode switch 120, and the other terminal of the second auxiliary mode selection switch 132 is selectively connected to one of the second operation mode resistor 402 and the auxiliary mode relay 600. For example, when the second auxiliary mode selection switch 132 is switched to the working mode, the other side terminal of the second auxiliary mode selection switch 132 is connected to the second working mode resistor 402, and when the second auxiliary mode selection switch 132 is switched to the running mode, the other side terminal of the second auxiliary mode selection switch 132 is connected to the auxiliary mode relay 600. On the other hand, one terminal of the second auxiliary mode selection switch 132 may be connected to the other terminal of the first auxiliary mode switch 121 based on the operation of the first auxiliary mode switch 121 included in the auxiliary mode switch 120.
One terminal of the third assist mode selection switch 133 is connected to one terminal of the traveling straight control valve 303, and the other terminal of the third assist mode selection switch 133 is selectively connected to one of the vehicle control device 150 and the second traveling mode resistor 502. For example, when the third auxiliary mode selection switch 133 is switched to the work mode, the other side terminal of the third auxiliary mode selection switch 133 is connected to the vehicle control device 150, and when the third auxiliary mode selection switch 133 is switched to the travel mode, the other side terminal of the third auxiliary mode selection switch 133 is connected to the second travel mode resistor 502.
One terminal of the fourth assist mode selection switch 134 is connected to the other terminal of the traveling straight control valve 303, and the other terminal of the fourth assist mode selection switch 134 is selectively connected to one of the vehicle control device 150 and the ground terminal. For example, when the fourth auxiliary mode selection switch 134 is switched to the work mode, the other side terminal of the fourth auxiliary mode selection switch 134 is connected to the vehicle control device 150, and when the fourth auxiliary mode selection switch 134 is switched to the travel mode, the other side terminal of the fourth auxiliary mode selection switch 134 is connected to the ground terminal.
On the other hand, the auxiliary mode relay 600 includes a coil 602, a diode 603 connected in parallel to the coil 602, and a switch 601. One terminal of switch 601 is commonly connected to one terminal of each of mode resistor 401, a travel mode resistor 501, and a second work mode resistor 402, and the other terminal of switch 601 is selectively connected to one of a second travel mode resistor 502 and a dummy terminal 700. For example, when the auxiliary mode selection switch 130 is switched to the work mode, the other terminal of the switch 601 is connected to the dummy terminal 700, and when the auxiliary mode selection switch 130 is switched to the travel mode, the other terminal of the switch 601 is connected to the second travel mode resistor 502. On the other hand, when the second auxiliary mode selection switch 132 is switched to the driving mode, the other terminal of the second auxiliary mode selection switch 132 may be connected to the coil 602. One terminal of the coil 602 may be selectively connected to the other terminal of the second auxiliary mode selection switch 132, and the other terminal of the coil 602 is connected to one terminal of the switch 601.
On the other hand, although not shown, one terminals of the first operation mode resistor 401, the first travel mode resistor 501, and the second operation mode resistor 402 are connected to the battery 30.
When the auxiliary mode switch 120 is converted into the non-driving mode, the first to fourth auxiliary mode switches 121 to 124 are all converted into the non-driving mode. Thus, one terminal and the other terminal of the first control valve 301 are connected to the vehicle control device 150, and one terminal and the other terminal of the second control valve 302 are connected to the vehicle control device 150. Thereby, the first control valve 301 and the second control valve 302 are controlled by the vehicle control device 150. When the assist mode switch 120 is switched to the non-drive mode, no current is supplied to the traveling direct control valve 303 regardless of the selection mode of the assist mode selection switch 130. Therefore, when the assist mode switch 120 is switched to the non-drive mode, the first control valve 301, the second control valve 302, and the traveling straight control valve 303 do not operate if an abnormality occurs in the vehicle control device 150 as described above. Therefore, the working machine of the construction machine does not operate.
However, even in the case where an abnormality occurs in the vehicle control device 150, the work machine or the travel motor may be operated when the assist mode switch 120 is switched to the drive mode.
For example, when the auxiliary mode switch 120 is switched to the driving mode, and the auxiliary mode selection switch 130 is switched to the operation mode, one terminal of the first control valve 301 is connected to the second operation mode resistor 402 through the first auxiliary mode switch 121 and the second auxiliary mode selection switch 132, the other terminal of the first control valve 301 is connected to the ground terminal through the second auxiliary mode switch 122, one terminal of the second control valve 302 is connected to the first operation mode resistor 401 through the third auxiliary mode switch 123 and the first auxiliary mode selection switch 131, the other terminal of the second control valve 302 is connected to the ground terminal through the fourth auxiliary mode switch 124, one terminal of the traveling straight control valve 303 is connected to the vehicle control device 150 through the third auxiliary mode selection switch 133, the other terminal of the traveling straight control valve 303 is connected to the vehicle control device 150 via the fourth assist mode selection switch 134. Further, the other side terminal of the switch 601 of the auxiliary mode relay 600 may be connected to the dummy terminal 700. Thus, currents corresponding to the first operation mode resistor 401 and the second operation mode resistor 402 can be supplied to the first control valve 301 and the second control valve 302. Therefore, even if an abnormality occurs in the vehicle control device 150, the working machine of the construction machine can be normally operated.
As another example, when the assist mode switch 120 is switched to the driving mode, and the assist mode selection switch 130 is switched to the driving mode, one terminal of the first control valve 301 is connected to the coil 602 of the auxiliary mode relay 600 through the first auxiliary mode switch 121 and the second auxiliary mode selection switch 132, the other terminal of the first control valve 301 is connected to the ground terminal through the second auxiliary mode switch 122, one terminal of the second control valve 302 is connected to the first travel mode resistor 501 through the third auxiliary mode switch 123 and the first auxiliary mode selection switch 131, the other terminal of the second control valve 302 is connected to the ground terminal through the fourth auxiliary mode switch 124, one terminal of the travel straight travel control valve 303 is connected to the second travel mode resistor 502 through the third auxiliary mode selection switch 133, the other terminal of the traveling straight control valve 303 is connected to the ground terminal via the fourth auxiliary mode selection switch 134. Further, the other side terminal of the switch 601 of the auxiliary mode relay 600 may be connected to the second travel mode resistor 502. That is, the switch 601 is connected to the second travel mode resistor 502 by switching of the current (weak current) flowing through the coil 602. Thus, the currents corresponding to the first travel mode resistor 501 and the second travel mode resistor 502 can be supplied to the second control valve 302 and the travel straight control valve 303. At this time, substantially no current is supplied to the first control valve 301 due to the high resistance of the coil 602. Therefore, even if an abnormality occurs in the vehicle control device 150, the travel motor of the construction machine can be operated normally.
Fig. 5 is a sequence diagram for explaining a driving method of an emergency driving system of a construction machine according to an embodiment of the present invention.
First, even when the start switch 190 of the construction machine is turned on, it is determined whether the construction machine is normally started (S1).
If the construction machine is not normally started, the operator turns on the emergency start mode switch 110 (S2). When the emergency start mode switch 110 is turned on, distress information may be displayed (S2). For example, light may be generated from a warning light. The light may be periodically flashed off.
On the other hand, when the construction machine is normally started, whether the construction machine is normally operated is determined by operating the control lever and the pedal of the construction machine (S3).
If the construction machine is not operated even if the control lever or the pedal is operated, the operator switches the assist mode switch 120 to the drive mode and switches the assist mode selection switch 130 to the work mode or the travel mode (S4). In this way, a predetermined current can be supplied to the first control valve 301, the second control valve 302, and the traveling straight control valve 303 through the resistor (S5). Accordingly, the work machine and the travel motor of the construction machine can be normally operated by the operation of the control lever and the pedal. In this case, the construction machine located at the dangerous place can escape to the safe place (S6).
On the other hand, the structure and method of the embodiment of the present invention may be applied to various working machines such as a wheel loader and a forklift in addition to the excavator.
The present invention described above is not limited to the above-described embodiments and drawings, and it is apparent to those skilled in the art to which the present invention pertains that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention.
Claims (13)
1. An emergency drive system for a construction machine, comprising:
an electronic hydraulic pump for operating a plurality of working machines;
a vehicle control device that outputs a control signal for the electronic hydraulic pump based on a plurality of work machine operation signals;
an electronic proportional valve for controlling the electronic hydraulic pump; and
and an emergency operation drive selection input unit that bypasses the vehicle control device and outputs a preset electric signal to the electronic proportional valve.
2. Emergency drive system of a working machine according to claim 1,
the emergency work drive selection input unit includes:
a plurality of resistors that output electrical signals different from each other; and
and an operation mode selection input unit for selectively connecting any one of the plurality of resistors in accordance with an operation of an operator.
3. The emergency drive system of a working machine according to claim 2,
the emergency work drive selection input unit further includes:
and an emergency mode selection input unit that bypasses the vehicle control device according to an operation of an operator and outputs an electric signal output from the resistor connected to the operation mode selection input unit to the electronic proportional valve.
4. Emergency drive system of a working machine according to claim 3,
the emergency mode selection input includes an auxiliary mode switch connected to the vehicle control device,
the operation mode selection input unit includes an assist mode selection switch connected to the vehicle control device,
the electronic proportional valve comprises a first control valve, a second control valve and a running straight-going control valve which are connected with an auxiliary mode switch,
the plurality of resistors includes a first operation mode resistor, a second operation mode resistor, a first travel mode resistor, and a second travel mode resistor connected to the auxiliary mode selection switch.
5. The emergency drive system of a working machine according to claim 4, further comprising:
an auxiliary mode relay connected to the auxiliary mode selection switch.
6. Emergency drive system of a working machine according to claim 5,
when the auxiliary mode switch is switched to a driving mode and the auxiliary mode selection switch is switched to an operation mode, a predetermined current is supplied to the first control valve and the second control valve according to the first operation mode resistor and the second operation mode resistor.
7. Emergency drive system of a working machine according to claim 5,
when the assist mode switch is switched to a driving mode and the assist mode selection switch is switched to a running mode, a preset current is supplied to the second control valve and the running straight control valve according to the first running mode resistor and the second running mode resistor.
8. Emergency drive system of a working machine according to claim 5,
the auxiliary mode switch includes:
a first auxiliary mode switch connected to one terminal of the first control valve and selectively connected to one of the vehicle control device and an auxiliary mode selection switch;
a second auxiliary mode switch connected to the other terminal of the first control valve and selectively connected to one of the vehicle control device and a ground terminal;
a third auxiliary mode switch connected to one terminal of the second control valve and selectively connected to one of the vehicle running device and the auxiliary mode selection switch; and
and a fourth auxiliary mode switch connected to the other terminal of the second control valve and selectively connected to one of the vehicle traveling device and a ground terminal.
9. The emergency drive system of a working machine according to claim 8,
the auxiliary mode selection switch includes:
a first auxiliary mode selection switch connected to the auxiliary mode switch and selectively connected to one of the first operation mode resistor and the first travel mode resistor;
a second auxiliary mode selection switch connected to the auxiliary mode switch and selectively connected to one of the second operation mode resistor and the auxiliary mode relay;
a third auxiliary mode selection switch connected to one terminal of the traveling straight control valve and selectively connected to one of the vehicle control device and the second traveling mode resistor; and
and a fourth auxiliary mode selection switch connected to the other terminal of the traveling straight control valve and selectively connected to one of the vehicle control device and a ground terminal.
10. The emergency drive system of a work machine of claim 5, further comprising:
an electronic control device connected to the vehicle control device;
starting the motor;
a starting switch connected between the starting motor and the battery;
a start control switch controlled by the electronic control device and connected between the battery and the start switch; and
an emergency starting mode switch connected between the battery and a control terminal of the starting switch.
11. The emergency drive system of a working machine according to claim 10,
the emergency starting mode switch is directly connected to the control terminal of the starting switch.
12. The emergency drive system of a work machine of claim 10, further comprising:
and a power supply control unit connected between the battery and the emergency start mode switch.
13. The emergency drive system of a work machine of claim 10, further comprising:
a warning lamp which operates when the emergency start mode switch is turned on.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2019-0027626 | 2019-03-11 | ||
| KR1020190027626A KR102624993B1 (en) | 2019-03-11 | 2019-03-11 | Construction machinery |
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| CN111675102A true CN111675102A (en) | 2020-09-18 |
| CN111675102B CN111675102B (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010166453.7A Active CN111675102B (en) | 2019-03-11 | 2020-03-11 | Emergency drive system for construction machine |
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| KR (1) | KR102624993B1 (en) |
| CN (1) | CN111675102B (en) |
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| EP1574627A1 (en) * | 2004-03-10 | 2005-09-14 | Volvo Construction Equipment Holding Sweden AB | Emergency control method for a work device of a construction equipment |
| CN102656323A (en) * | 2009-12-18 | 2012-09-05 | 斗山英维高株式会社 | Position control apparatus and method for working machine of construction machinery |
| CN102667014A (en) * | 2009-12-22 | 2012-09-12 | 斗山英维高株式会社 | Electronic hydraulic control apparatus using variable behavior characteristics, and method for same |
| CN103282675A (en) * | 2010-12-24 | 2013-09-04 | 斗山英维高株式会社 | Hydraulic system for construction machine including emergency control unit for electric hydraulic pump |
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|---|---|---|---|---|
| JP2772540B2 (en) * | 1989-04-12 | 1998-07-02 | 油谷重工株式会社 | Travel control device for wheeled excavator |
| KR960027597U (en) * | 1995-01-28 | 1996-08-17 | Excavator's Drive Preparation | |
| KR20110072606A (en) * | 2009-12-23 | 2011-06-29 | 두산인프라코어 주식회사 | Switch device for construction equipment |
| KR102054519B1 (en) | 2011-12-27 | 2019-12-10 | 두산인프라코어 주식회사 | Hydraulic system of construction machinery |
| KR20140036755A (en) * | 2012-09-18 | 2014-03-26 | 현대중공업 주식회사 | Safety alarming apparatus for using start switch on starting mode of heavy equipment |
| KR101575090B1 (en) * | 2014-04-28 | 2015-12-08 | 대모 엔지니어링 주식회사 | Piping kit controller for option attachment excavator |
-
2019
- 2019-03-11 KR KR1020190027626A patent/KR102624993B1/en active IP Right Grant
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2020
- 2020-03-11 CN CN202010166453.7A patent/CN111675102B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1574627A1 (en) * | 2004-03-10 | 2005-09-14 | Volvo Construction Equipment Holding Sweden AB | Emergency control method for a work device of a construction equipment |
| CN102656323A (en) * | 2009-12-18 | 2012-09-05 | 斗山英维高株式会社 | Position control apparatus and method for working machine of construction machinery |
| CN102667014A (en) * | 2009-12-22 | 2012-09-12 | 斗山英维高株式会社 | Electronic hydraulic control apparatus using variable behavior characteristics, and method for same |
| CN103282675A (en) * | 2010-12-24 | 2013-09-04 | 斗山英维高株式会社 | Hydraulic system for construction machine including emergency control unit for electric hydraulic pump |
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| Publication number | Publication date |
|---|---|
| KR102624993B1 (en) | 2024-01-12 |
| CN111675102B (en) | 2022-10-21 |
| KR20200108663A (en) | 2020-09-21 |
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Address after: Inchon, South Korea Patentee after: HYUNDAI DOOSAN INFRACORE Co.,Ltd. Address before: Inchon, South Korea Patentee before: DOOSAN INFRACORE Co.,Ltd. |