JP3668586B2 - Maintenance equipment for work machines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a maintenance device for a work machine, and more particularly to a maintenance device for a work machine capable of performing maintenance management on a work machine such as a hydraulic excavator, a crane, or a bulldozer by a simple method.
[0002]
[Prior art]
In general, work machines are often used in harsh conditions, and each part of the work machine is heavily worn. For this reason, appropriate maintenance management is required for these work machines. Since maintenance management requires a high level of specialized knowledge, it is common for work machine manufacturers to perform maintenance management. Conventionally, in maintenance management, a maintenance worker is sent to a work site where a work machine to be maintained is located, operates the work machine, and obtains data obtained from various sensors provided in a required part of the work machine. Recording is performed on an IC card via a data writing device, and various types of recorded data are analyzed by an analysis device to detect an abnormality of the work machine or its sign.
[0003]
Here, an installation example of sensors installed in each part of the work machine will be described with reference to FIG.
[0004]
In the figure, 1 is an engine, 1a is a governor lever of the engine 1, 2 is a hydraulic pump, 2a is a variable displacement mechanism of the hydraulic pump 1, 3 is a pilot pump, 4 is a hydraulic cylinder, 5 is a hydraulic pump 2, and a hydraulic cylinder 4 , A pilot valve for operating the flow control valve 5, 6a an operating lever for the pilot valve 6, and 7 a hydraulic oil tank. When the operator operates the operation lever 6a in either direction, the flow control valve 5 is displaced according to the operation direction, and the hydraulic oil of the hydraulic pump 2 is supplied to the hydraulic cylinder 4 to drive it, thereby The working mechanism of each part of the working machine that has not been driven is driven to perform the required work. In the figure, 8 and 9 are pressure switches for detecting the operating direction of the operating lever 6a, 10 is an angle sensor for detecting the amount of displacement of the governor lever 1a, 11 is a rotational speed sensor for detecting the rotational speed of the engine 1, and 13 is a hydraulic pump. 1 is a pressure sensor that detects the discharge pressure of 1, and 14 is a temperature sensor that detects the temperature of the hydraulic oil tank 7. Although not shown, the working mechanism is provided with a sensor or the like for detecting a driving amount ((angle)).
[0005]
By the way, work machines are usually moved around the work site for convenience of work or due to work plan changes. Even when going to the site, there often occurs a situation in which the work machine does not exist, and in that case, the maintenance personnel are seconded to the work site and maintenance efficiency is significantly reduced. In addition, when the work site is located in a relatively remote place such as a mine or a quarry, it takes a long time just to go to the work site and similarly, the work efficiency is remarkably poor.
[0006]
In order to deal with such a situation, for example, Japanese Patent Application Laid-Open No. 7-166582 discloses that a maintenance worker can perform wireless communication between a resident management unit and a work machine, and the maintenance person can communicate with the operator of the work machine. Ask the work machine to operate in the required mode, or maintenance personnel remotely operate the work machine in the required mode and receive various sensor data obtained as a result of the operation. Means for making a diagnosis are disclosed.
[0007]
[Problems to be solved by the invention]
However, usually, the work site is noisy and the radio wave condition is bad, and it is often difficult to reliably convey this even if the maintenance staff asks the operator to operate in a required manner. In addition, automatic operation of work machines must take some measures in advance so that accidents do not occur, and it takes time and effort. Even if such measures are taken, automatic operation is still in a sufficiently safe state. There is a problem that you can not.
[0008]
In view of the above-mentioned various problems, the present invention can ensure that a driving operation is performed in a required manner during maintenance and inspection of a construction machine, and accordingly, necessary data is reliably obtained from the construction machine. It is an object of the present invention to provide a work machine maintenance device that can be used.
[0009]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems.
[0010]
A work machine side maintenance device comprising: state data collection means for collecting state data of each part of the work machine; and communication means for transmitting the state data collected by the state data collection means to the management unit side maintenance device;
A communication device that receives the condition data transmitted from the working machine side maintenance device, and the management unit side maintenance device comprising a state data acquisition means for displaying saved state data received by said communication device,
In maintenance equipment for work machines composed of
The state data collection means includes defect information input means composed of a plurality of defect content switches pressed corresponding to the defect state, and corresponds to the pressed defect content switch among the plurality of defect content switches. According to the inputted defect information, state data of each part of the work machine is collected.
[0011]
The state data collecting means includes
In accordance with the input defect information, an operation instruction display means for displaying the operation content to operate the work machine,
After the operation of the work machine according to the operation content, state data of the work machine is collected according to the input defect information.
[0012]
In addition, the work machine side maintenance device,
It is characterized by comprising a storage body provided with the state data collection means and the communication means inside, and provided with a plurality of switches as the defect information input means and a display screen as the operation instruction display means on the external surface. Maintenance equipment for working machines.
[0013]
In addition, the management unit side maintenance device,
It is characterized by comprising a portable storage body provided with the state data obtaining means and the communication means inside, and having a display screen for displaying the state data obtained by the state data obtaining means on the external surface.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
A working machine maintenance apparatus according to an embodiment of the present invention will be described below with reference to FIGS.
[0015]
FIG. 1 is a block diagram of a maintenance device for a work machine according to this embodiment.
[0016]
In the figure, 20 is a management unit side maintenance device installed in a management office or carried by maintenance personnel, 21 is a management unit side control unit, 22 is a display unit, 23 is a communication controller, 23a is an antenna, 211 Is a CPU for performing arithmetic processing, 212 is a ROM for storing various programs and data, 213 is a RAM for storing data such as calculation results, 214 is a data storage unit comprising a RAM for storing data transmitted from the work machine, Reference numeral 215 denotes a defect content code storage unit including a RAM or a ROM, and 216 denotes an input / output interface.
[0017]
30 is a machine side maintenance device provided in the work machine, 31 is a machine side control unit, 32 is a display unit, 33 is a fault content switch group, 34 is an operation end switch, 35 data confirmation switch, 36 is a communication controller, 36a is an antenna 311 is a CPU for performing arithmetic processing, 312 is a ROM for storing programs and data, 313 is a RAM for storing data of operation results and sensor data acquired from the operation controller 40, 314 is a clock, 315 is a RAM or ROM 316 is an operation instruction code storage unit composed of RAM or ROM, 317 is a data storage address storage unit composed of RAM or ROM, and 318 is an input / output interface.
[0018]
Reference numeral 40 denotes an operation controller provided in the work machine for performing various operation controls of the work machine, and is constituted by a microcomputer. The operation controller 40 takes in detection data from various sensors provided in the work machine and sensor data of various switches and performs necessary control of the work machine, for example, excavation control of a hydraulic excavator.
[0019]
FIG. 2 is a side view of a hydraulic excavator as a work machine on which the machine side maintenance device 30, the operation controller 40, the communication controller 36, and the like according to the present embodiment are mounted.
[0020]
In the figure, 50 is a hydraulic excavator, 51 is a lower traveling body provided with a crawler, 52 is an upper revolving body provided so as to be able to swivel on the lower traveling body 51, 52a is a cab arranged in the upper revolving body 52, 53 A boom, 54 is an arm, and 55 is a bucket. Although not shown, an angle sensor is attached to the rotation center of the boom 53, the arm 54, and the bucket 55, and the detected value is stored in the storage unit of the operation controller 40. Reference numeral 30 denotes a machine-side maintenance apparatus shown in FIG. 1 and is provided in the cab 52a. Reference numeral 36a denotes an antenna shown in FIG.
[0021]
FIG. 3 is a diagram showing the display unit 22 of the management unit side maintenance apparatus 20 shown in FIG.
[0022]
In the figure, 22 is a display unit for displaying defect information transmitted from the work machine and various sensor data obtained by operating in response to the defect, 200 is a case of the display unit 22, and 201 and 202 are managements, respectively. These are a cable and a connector for connecting to the part-side control unit 21.
[0023]
The case 200 can also store the management-side control unit 21 itself, and can also store the communication controller 23 and its antenna 23a. When all the devices are stored in the case 200 in this way, the maintenance unit side maintenance device can be reduced in size and can be carried by a maintenance staff.
[0024]
FIG. 4 is a perspective view of a case including a failure content switch group, an operation end switch, a data confirmation switch, and a display unit of the machine side maintenance device 30 shown in FIG.
[0025]
In the figure, 32 is a display unit for instructing the operator about the operation contents, 33 is a trouble content constituted by a plurality of trouble content switches 33a, 33b, 33c,... Pressed in response to various trouble states of the hydraulic excavator. A switch group, 34 is an operation end switch, 35 is a data confirmation switch, 300 is a case, and 301 and 302 are cables and connectors for connecting the case 300 and the machine-side control unit 31, respectively.
[0026]
The case 300 can house the machine-side control unit 31 itself, and can also house the communication controller 23 and its antenna 23a.
[0027]
The defect content switch group 33 includes, for example, a switch group that is distinguished according to the defect content, such as 33a causing “engine stall”, 33b “turning slowly”, and 33c “air conditioner not working”. When any one of the defect content switch groups 33 is pressed, an operation instruction corresponding to the switch is displayed on the display unit 32. For example, when the defect content switch 33a is pressed, “the engine is set to the maximum speed”. The operation instruction “Please put the operation lever into the full stroke with the arm crowded” is displayed on the display unit 32.
[0028]
FIG. 5 is a different example of the case 300 shown in FIG. 4, and is a perspective view of a case including a failure content switch group, an operation end switch, a data confirmation switch, and a display unit of the machine side maintenance device 30 shown in FIG. .
[0029]
400 is a case in which a touch panel or a connector is attached, and 401 is a liquid crystal display screen having a screen as a switch. The operation instruction content is displayed and a trouble content switch group and an operation end switch are pressed by pressing the display surface. Each function of the operation confirmation switch can be performed. Reference numerals 402 and 403 denote cables and connectors for connecting the case 400 and the machine-side control unit 31, respectively.
[0030]
As in the case 300 of FIG. 4, the case 400 can store the machine-side control unit 31 itself in the case 400, and can also store the communication controller 36 and its antenna 36a. It is.
[0031]
FIG. 6 is a diagram showing the contents of the comparison table stored in the defect content code storage unit 315 shown in FIG.
[0032]
As shown in the figure, this table is composed of defect content codes corresponding to the switch numbers of the respective defect content switches 33a, 33b.
[0033]
FIG. 7 is a diagram showing the contents of the comparison table stored in the defect content code storage unit 315 shown in FIG.
[0034]
As shown in the figure, this table is composed of sensor data request numbers corresponding to the defect content codes.
[0035]
FIG. 8 is a diagram showing the contents of the comparison table stored in the operation instruction code storage unit 316 shown in FIG.
[0036]
As shown in the figure, this table includes operation instruction codes for the operator corresponding to the defect content codes.
[0037]
FIG. 9 is a diagram showing a comparison table stored in the data storage address storage unit 317 shown in FIG.
[0038]
This table is composed of sensor data request numbers, detection values of various sensors (not shown) in the operation controller 40, and addresses of storage units for storing sensor data such as switch states of the switches.
[0039]
FIG. 10 is a diagram showing the contents of the comparison table stored in the defect content code storage unit 215 shown in FIG.
[0040]
As shown in the figure, this table is composed of defect contents corresponding to the defect content codes, and the defect contents corresponding to the defect content codes transmitted from the machine-side maintenance device 30 are displayed on the display unit of the management unit maintenance device 20. 22 is a table to be output to 22.
[0041]
FIG. 11 is a diagram showing a data group transmitted from the machine side maintenance device 30 shown in FIG. 1 to the management side maintenance device 20.
[0042]
In the figure, D1 indicates the serial number n of the number of data acquisitions, N is the predetermined number of data acquisitions to be collected, D2 is the defect content code, D3 is the operation end flag, and “1” is the operation at that serial number Indicates that has ended. For example, D4 indicates various sensor data i such as the target engine speed and the engine speed, D5 is a time when each data is acquired, and D6 is an end flag indicating the end of data acquisition for each serial number.
[0043]
Through a series of operations, sensor data is transmitted from the machine side maintenance device 30 to the management side maintenance device 20 until a predetermined data acquisition number N as shown in the figure is reached.
[0044]
FIG. 12 is a diagram illustrating a state in which the sensor data illustrated in FIG. 11 is transmitted and displayed on the display unit 22 of the management unit side maintenance device 20.
[0045]
In the figure, “engine stall occurs” indicates a malfunction that engine stall occurs, the number indicates the serial number of the sensor data, the start / end indicates a flag indicating the start / end of data acquisition, and “engine target speed” , “Engine speed”... Is a sensor data item detected by each sensor for the item.
[0046]
In the figure, the sensor data of a predetermined number of acquired data N is displayed for the problem that “engine stall occurs”.
[0047]
Next, the processing procedure of the maintenance apparatus according to the present embodiment will be described with reference to the flowcharts shown in FIGS.
[0048]
FIG. 13 is a flowchart showing a processing procedure of the machine side maintenance apparatus 30.
[0049]
In the figure, in step 100, it is determined whether or not any of the defect content switch group 33 has been pressed, and if pressed, in step 101, the sensor data acquisition number is set to a predetermined acquisition number N, and the serial number n and sensor The order i of the data request numbers is set to the initial value “1”. Next, in step 102, when the defect content switch 33 is pressed, the corresponding defect content code is read from the defect content code storage unit 315. In step 103, an operation instruction code corresponding to the read defect content code is read from the operation instruction code storage unit 316, and the operation instruction code is displayed on the display unit 32. The operator operates the operation unit of the work machine (not shown) according to the operation instruction displayed on the display unit 32 to operate the work machine. In step 104, the sensor data request number corresponding to the defect content code is read from the defect content code storage unit 315, and the operation controller address corresponding to the read sensor data request number is read from the data storage address storage unit 317. It is. In step 105, sensor data is obtained from a data storage unit (not shown) in the operation controller according to the read operation controller address, and stored in the RAM 313. When the processing from step 104 to step 107 is repeated to obtain sensor data corresponding to all sensor data request numbers i, the end flag END shown in FIG. 7 is detected at step 106, and the serial data shown in FIG. All data corresponding to the number n is synthesized. Next, in step 109, the combined sensor data is transmitted to the management unit side maintenance device 20 via the communication controller 36. Next, the processing from step 104 to step 111 is repeated, and when the predetermined data acquisition number N is reached in step 110 as shown in FIG. 11, the data acquisition is terminated. Next, in step 112, when the operator confirms acquisition of all data, the operator turns on the data confirmation switch 35. If the data confirmation switch 35 is not turned on, the processing from step 101 is performed again to acquire data.
[0050]
Next, a flowchart illustrating a processing procedure of the management-side maintenance apparatus 20 illustrated in FIG. 14 will be described.
[0051]
In the figure, in step 200, the management unit side maintenance device 20 determines the presence or absence of communication from the machine side maintenance device 30, and when data is transmitted in step 201, the management unit side control unit 21 receives the received data. In step 202, the data is stored in the data storage unit 214. In step 203, the data acquired in the form as shown in FIG. 12, for example, is displayed on the display unit 22.
[0052]
As described above, according to the present embodiment, even if there is no instruction from the maintenance staff from the management unit side, when a failure occurs, the operator inputs the failure content information corresponding to the failure content and displays it on the work machine side. The work machine is operated in accordance with an operation instruction displayed on the unit, sensor data in the operation state is acquired, and defect content information and sensor data are automatically transmitted to the management unit side. Therefore, troublesome communication between the maintenance staff and the operator is omitted, and maintenance diagnosis can be performed efficiently.
[0053]
【The invention's effect】
As described above, in the present invention, in response to a failure, the operator inputs information corresponding to the failure to the machine-side maintenance device, so that the machine-side maintenance device automatically receives status data from the work machine. Since the data is acquired and transmitted to the management unit side maintenance device, the management unit can easily obtain the state data of the work machine, and can efficiently perform the maintenance diagnosis of the work machine.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a work machine maintenance apparatus according to an embodiment of the present invention.
FIG. 2 is a side view of a hydraulic excavator which is a work machine according to the present embodiment.
FIG. 3 is a perspective view of a display unit of the management unit side maintenance apparatus shown in FIG. 1;
4 is a perspective view of a case that houses a failure content switch group, an operation end switch, a data confirmation switch, and a display unit of the machine side maintenance apparatus shown in FIG. 1; FIG.
5 is a perspective view of a case different from FIG. 4 that houses a failure content switch group, an operation end switch, a data confirmation switch, and a display unit of the machine-side maintenance apparatus shown in FIG. 1;
6 is a diagram showing a comparison table stored in a defect content code storage unit 315 shown in FIG. 1;
7 is a view showing a comparison table stored in a defect content code storage unit 315 shown in FIG. 1; FIG.
FIG. 8 is a diagram showing a comparison table stored in the operation instruction code storage unit 316 shown in FIG. 1;
FIG. 9 is a diagram showing a comparison table stored in the data storage address storage unit 317 shown in FIG. 1;
10 is a diagram showing a comparison table stored in a defect content code storage unit 215 shown in FIG. 1. FIG.
11 is a diagram showing data transmitted from the machine-side maintenance device 30 shown in FIG. 1 to the management-side maintenance device 20. FIG.
12 is a diagram showing data displayed on the display unit 22 of the management unit side maintenance apparatus 20 shown in FIG. 1. FIG.
13 is a flowchart showing a processing procedure of the machine side maintenance apparatus 30. FIG.
14 is a flowchart showing a processing procedure of the management unit side maintenance apparatus 30. FIG.
FIG. 15 is a diagram showing an installation example of sensors installed in each part of the work machine.
[Explanation of symbols]
20 management unit side maintenance device 21 management unit side control unit 22 display unit 23, 36 communication controller 30 machine side maintenance device 31 machine side control unit 32 display unit 33 fault content switch group 40 operation controller

Claims (4)

A work machine side maintenance device comprising: state data collection means for collecting state data of each part of the work machine; and communication means for transmitting the state data collected by the state data collection means to the management unit side maintenance device;
A communication device that receives the condition data transmitted from the working machine side maintenance device, and the management unit side maintenance device comprising a state data acquisition means for displaying saved state data received by said communication device,
In maintenance equipment for work machines composed of
The state data collection means includes defect information input means composed of a plurality of defect content switches pressed corresponding to the defect state, and corresponds to the pressed defect content switch among the plurality of defect content switches. A maintenance device for a work machine, which collects state data of each part of the work machine in accordance with input defect information. In the description of claim 1,
The state data collecting means includes
In accordance with the input defect information, an operation instruction display means for displaying the operation content to operate the work machine,
A work machine maintenance device, wherein after the operation of the work machine according to the operation content, state data of the work machine is collected according to the input defect information. In the claim according to claim 1 or 2,
The work machine side maintenance device is:
It is characterized by comprising a storage body provided with the state data collection means and the communication means inside, and provided with a plurality of switches as the defect information input means and a display screen as the operation instruction display means on the external surface. Maintenance equipment for working machines. In the claim according to claim 1 or 2,
The management unit side maintenance device is:
An operation characterized by comprising a portable storage body provided with the state data obtaining means and the communication means inside, and having a display screen for displaying the state data obtained by the state data obtaining means on an external surface. Machine maintenance equipment.

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