JPH11190048A - Maintenance device for working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a maintenance device for a working machine capable of preserving collected state data in the case a communication state is bad. SOLUTION: A maintenance device for a working machine includes an inconvenient information input device 33 for inputting inconvenient information in accordance with inconvenience to a working machine, a state data collection device 31 for collecting state data in every part of the working machine in accordance with the inputted inconvenient infomation and a transmitting device 36 for transmitting the collected state data to a control side maintenance device 20. In that case, the maintenance device for the working machine includes a data storing device 318 for storing the inputted inconvenient information and state data when the inputted inconvenient information and state data is not normally transmitted to the control side maintenance device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a maintenance device for a working machine, and more particularly to a maintenance device for a working machine capable of performing maintenance management on a working machine such as a hydraulic shovel, a crane, and a bulldozer by a simple method.

[0002]

2. Description of the Related Art In general, working machines are often used under severe conditions, and parts of the working machine are severely worn. Therefore, appropriate maintenance management is required for these work machines. Maintenance requires a high level of expertise,
It is customary for a work machine manufacturer to perform maintenance management. Conventionally, when obtaining data necessary for maintenance management, a maintenance worker goes to a work site where a work machine to be maintained is located, activates the work machine, and various sensors provided at required locations of the work machine. Or the operator inputs information corresponding to the malfunction to the machine-side maintenance device according to the malfunction, and the machine-side maintenance device automatically obtains status data from the work machine and stores the data in the management unit. The transmission method to the side maintenance device was taken. The status data obtained in this way is analyzed by the analysis device and used to detect an abnormality of the work machine or its sign.

Next, an example of installation of sensors installed in each part of the working machine will be described with reference to FIG.

In the drawing, reference numeral 1 denotes an engine, 1a is a governor lever of the engine 1, 2 is a hydraulic pump, 2a is a variable displacement capacity 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 6 for operating the flow control valve 5, 6a an operating lever of the pilot valve 6, and 7 a hydraulic oil tank. When the operator operates the operation lever 6a in any direction, the flow control valve 5 is displaced in accordance with the operation direction, and the hydraulic oil of the hydraulic pump 2 is supplied to the hydraulic cylinder 4 to drive the same, whereby The working mechanism of each part of the working machine that is not performed is driven to perform a required work. In the figure, 8 and 9 are pressure switches for detecting the operation direction of the operation lever 6a, and 10 is the governor lever 1a.
An angle sensor for detecting the displacement of the engine 1, a rotation speed sensor 11 for detecting the rotation speed of the engine 1, a pressure sensor 12 for detecting the discharge pressure of the hydraulic pump 1, and a temperature sensor 13 for detecting the temperature of the hydraulic oil tank 7. It is. Although not shown, the working mechanism includes a sensor for detecting a driving amount (angle).

[0005] By the way, work machines are usually moved around the work site due to work reasons or a change in work plan, and maintenance personnel are required to perform maintenance work upon contact from a customer or the like. Even when a worker goes to a work site of a machine, a situation often occurs in which the work machine is not present. In such a case, maintenance staff is wasted on the work site and maintenance efficiency is significantly reduced. Further, when the work site is located in a relatively remote place such as a mine or a quarry, it takes a long time even if a maintenance person visits the work site, and similarly, the work efficiency is extremely poor.

Conventionally, in order to cope with such a situation, a maintenance device is provided on each of the management unit side where the maintenance staff is resident and the work machine side, and an operator inputs trouble information according to the trouble of the work machine, and the work machine side. The maintenance device displays the operation contents to operate the work machine on the operation display means in accordance with the input trouble information, and the operator operates the work machine in accordance with the operation contents, and operates the work machine components according to the trouble information. State data was collected and transmitted to the management unit side maintenance device.

[0007]

However, in the above-mentioned conventional maintenance apparatus for a working machine, the operator inputs information on the contents of the malfunction corresponding to the contents of the malfunction, and operates the working machine in accordance with the operation display displayed on the display unit. Even if the sensor data in the operation state is transmitted to the management unit, the radio wave condition is usually poor at the work site, and the data cannot always be transmitted to the maintenance device on the management unit side.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a maintenance device for a working machine capable of reliably obtaining required data from the working machine during maintenance and inspection of the working machine.

[0009]

The present invention employs the following means in order to solve the above-mentioned problems.

Fault information input means for inputting fault information in response to a fault of the work machine; status data collecting means for collecting status data of each part of the work machine in response to the input fault information; And a transmission unit for transmitting the state data to the management unit maintenance device, wherein the maintenance device of the work machine does not normally transmit the state data to the management side maintenance device. And data storage means for storing state data.
It is characterized by having.

Further, the maintenance device for a work machine according to the first aspect of the present invention is characterized in that the maintenance device further comprises a transmission-disabled display means for displaying that the data cannot be normally transmitted to the management-side maintenance device.

Further, in the maintenance device for a work machine according to any one of claims 1 and 2, a display means for displaying a time when the defect information is input and the defect information is provided. Features.

[0013] Further, in the maintenance device for a work machine according to any one of claims 1 to 3, the maintenance device for the work machine may be configured to transfer the data in the data storage unit to an external storage unit. An output unit is provided.

According to a fifth aspect of the present invention, in the maintenance device for a work machine, the external storage means is a memory provided in a computer.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A maintenance device for a working machine according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram of a maintenance device for a working machine according to this embodiment.

In FIG. 1, reference numeral 20 denotes a management unit-side maintenance device which is installed in a management office or the like or is carried by a maintenance person, 21 denotes a management unit-side control unit, 22 denotes a display unit, 23 denotes a communication controller, and 23a denotes an antenna. is there.

Reference numeral 30 denotes a machine-side maintenance device provided in the work machine, 31 denotes a machine-side control unit, 32 denotes a display unit, 33 denotes a failure content switch group, 34 denotes an operation end switch, 35 data confirmation switches, 36 denotes a communication controller, 36a is an antenna, 37 is a defect lamp for displaying a state of a defect, 38 is a defect information display section, 39 is a transmission wait reset button, and 40 is a work machine for performing various operation controls of the work machine. The operation controller 41 is a local data output unit for connecting to a portable external storage device such as a personal computer.

Reference numeral 311 denotes a CPU for performing arithmetic processing; 312, a ROM for storing programs and data; 313, a RAM for storing calculation result data and sensor data obtained from the operation controller 40;
Numeral 5 is a defect content code storage unit composed of 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 a case where data transmission is impossible. A transmission waiting defect data storage unit 319 for temporarily storing the defect content code and status data is an input / output interface.

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. Operation controller 4
Numeral 0 fetches detection data from various sensors provided in the work machine and sensor data of various switches to perform necessary control of the work machine, for example, excavation control of a hydraulic shovel.

FIG. 2 is a side view of a hydraulic shovel as a working machine on which the machine-side maintenance device 30, operation controller 40, communication controller 36 and the like according to the present embodiment are mounted.

In the drawing, 50 is a hydraulic excavator, 51 is a lower traveling body provided with a crawler, 52 is an upper revolving body rotatably provided on the lower traveling body 51, and 52a is a cab disposed on the upper revolving body 52. , 53 are a boom, 54 is an arm, and 55 is a bucket. Although not shown, an angle sensor is attached to the center of rotation of the boom 53, the arm 54, and the bucket 55, and the detected value is stored in a storage unit of the operation controller 40. Reference numeral 30 denotes a machine-side maintenance device shown in FIG. 1, which is provided in the operator cab 52a.
36a is the antenna shown in FIG.

FIG. 3 is a diagram showing the display unit 22 of the management unit-side maintenance device 20 shown in FIG.

In the figure, reference numeral 22 denotes 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 denotes a case of the display unit 22, 201, 202 Are a cable and a connector for connecting to the management unit side control unit 21, respectively.

The case 200 includes the management-side control unit 2
1 itself can be housed, and the communication controller 23 and its antenna 23a can also be housed. When all the devices are stored in the case 200 in this way, the maintenance unit-side maintenance device can be downsized and carried by maintenance personnel.

FIG. 4 is a perspective view of a case of the machine-side maintenance device 30 shown in FIG. 1 which includes a failure content switch group, an operation end switch, a data confirmation switch, and a display unit.

In the figure, reference numeral 32 denotes a display unit for instructing the operator on the operation contents, and reference numeral 33 denotes a plurality of failure content switches 3 which are pressed corresponding to various failure states of the hydraulic shovel.
A failure content switch group composed of 3a, 33b, 33c,..., 34 is an operation end switch, 35 is a data confirmation switch that is operated when the operator confirms acquisition of all data, 37 is a failure lamp, and 38 is a transmission. A waiting information display unit, 39 is a transmission waiting reset button, 41 is a local data output unit, 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.

The case 300 includes a machine-side control unit 3.
1 itself can be stored, and further, the communication controller 36 and its antenna 36a can be stored.

Further, the failure content switch group 33 is, for example, a switch group distinguished according to the failure content, such as 33a "starts engine", 33b "slow turning", and 33c "air conditioner does not work". When any one of the failure content switches 33 is pressed, the corresponding operation instruction is displayed on the display unit 32. For example, when the failure content switch 33a is pressed,
The operation instruction is displayed on the display unit 32, "Please put the operation lever into full stroke while the engine is running at full speed and the arm is fully clouded."

FIG. 5 is a different example of the case 300 shown in FIG. 4, and includes a failure content switch group, an operation end switch, a data confirmation switch, and the like of the machine side maintenance device 30 shown in FIG.
FIG. 4 is a perspective view of a case including a display unit.

Reference numeral 400 denotes a case attached to a touch panel or a connector. Reference numeral 401 denotes a liquid crystal display screen having a screen as a switch. , An operation end switch and an operation confirmation switch. Reference numerals 402 and 403 denote cables and connectors for connecting the case 400 and the machine-side control unit 31, respectively.

The case 400 corresponds to the case 30 in FIG.
0, the machine-side control unit 31
The communication controller 36 and its antenna 36a can also be stored.

FIG. 6 is a diagram showing the contents of the comparison table stored in defect content code storage section 315 shown in FIG.

As shown in the table, this table is composed of defect content codes corresponding to the switch numbers of the respective defect content switches 33a, 33b,.

FIG. 7 is a diagram showing the contents of the comparison table stored in defect content code storage section 315 shown in FIG.

As shown, this table is composed of sensor data request numbers corresponding to the defect content codes.

FIG. 8 is a diagram showing the contents of the comparison table stored in the operation instruction code storage section 316 shown in FIG.

This table is composed of operation instruction codes for the operator corresponding to the defect content codes, as shown in FIG.

FIG. 9 is a diagram showing a comparison table stored in the data storage address storage unit 317 shown in FIG.

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.

FIG. 10 shows the machine-side maintenance device 30 shown in FIG.
FIG. 5 is a diagram showing a data group transmitted from the management device 20 to the management-side maintenance device 20.

In the figure, D1 indicates a serial number n of the number of data acquisitions, N is a predetermined number of data acquisitions to be collected,
D2 indicates a failure content code, D3 indicates an operation end flag, and "1" indicates that the operation at that serial number has ended. D4 indicates various sensor data i such as an engine target rotation speed and an engine rotation speed, for example, D5 indicates a time at which each data is obtained, and D6 is an end flag indicating the end of data acquisition for each serial number.

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.

FIG. 11 shows a format stored in the transmission waiting defect data storage unit 318 when communication is impossible. In the figure, E1 is the number of acquired data, E2 is the time data when the trouble button was pressed, E3 is the trouble content code shown in FIG. 10, E4 is the operation end flag, and E5 is the data i shown in FIG. State data.

Next, the machine side maintenance device 3 according to the present embodiment.
0 will be described with reference to the flowcharts shown in FIGS.

FIG. 12 is a flowchart showing a processing procedure of sensor data collection of the machine side maintenance device 30.

In the figure, in step 100, it is determined whether or not any of the failure content switches 33 has been pressed, and when pressed, in step 101, the sensor data acquisition number is set to a predetermined acquisition number N, and the serial number is set. n and the order i of the sensor data request number are set to the initial value “1”. Next, in step 102, it is determined which switch has been pressed by the failure content switch group 33, and the failure content code corresponding to the pressed switch is read from the failure content code storage unit 315. Step 103
In, the 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 (not shown) of the work machine 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 read 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 the sensor data corresponding to all the sensor data request numbers i, step 1
At 06, the end flag END shown in FIG.
In step 108, all data corresponding to the serial number n shown in FIG. 10 is synthesized. Next, step 10
The processing from step 4 to step 110 is repeated, and in step 109, as shown in FIG. Next, in step 111, when the operator confirms acquisition of all the 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. If the confirmation switch is ON, the process proceeds to a flowchart showing a process for executing communication with the management side.

FIG. 13 is a flowchart showing a process of transmitting sensor data collected from the machine-side maintenance device 30 to the management-side maintenance device 20.

In the figure, at step 201, the timer t is cleared. Next, at step 202, R
The telephone number of the management unit-side maintenance device 20 is read from the OM 312, and this data is passed to the communication controller 36. In step 203, the connection time tw is changed to the sampling time Δ
Update with ts. Next, in step 204, it is determined whether or not the telephone has been connected. If the telephone can be connected to the communication controller 23 on the management unit side, the data group at the time when the failure content switch 33 is pressed is output to the communication controller 36 in step 214. If the connection cannot be established, the call is repeatedly made in step 205 until the connection time tw reaches the connection limit time Ttimeout. If the connection time tw exceeds the connection limit time Ttimeout, the process proceeds to step 206. In step 206, the sensor data group including the defect content code is stored in the transmission-waiting defect data storage unit 318. Next, step 207
, The lamp with the defect data is turned on to always display the state of the defect. Next, at step 208, the time when the trouble content switch 33 is pressed and the trouble content code are displayed on the trouble information display section 38. Next, in step 209, it is monitored whether the transmission waiting reset button 39 has been pressed. Send wait reset button 39
If is not pressed, after waiting for a certain time in step 210, steps 201 to 209 are repeated. When the transmission waiting reset button 39 is pressed, the fault lamp is turned off and the transmission information is not displayed.
At this time, if a personal computer or an external memory is connected to the local data output unit 41, it is determined that the data is to be transferred to the personal computer or the external memory, and the synthesized data is sent to the personal computer or the external memory, and the process is terminated. Although the above description has been made on the assumption that data is transmitted by telephone,
Any other transmission means may be employed.

As described above, according to the present embodiment, the operator inputs and displays the trouble content information corresponding to the trouble content on the work machine side when a trouble occurs without the instruction of the maintenance staff from the management unit. If the work machine is operated in accordance with the operation instruction displayed on the section, sensor data in the operation state can be automatically collected, and the defect content information and the sensor data can be transmitted to the management section. When transmission is not possible, the defect content information and the sensor data are stored in an internal memory, and the fact that there is a defect is displayed until transmitted. Therefore, even if the data is not transmitted to the management unit, it is possible to see at a glance that there is a problem by looking at the display unit of the machine-side maintenance device in the patrol service and to know the content of the problem at a glance, so that the maintenance diagnosis can be performed efficiently. If a personal computer or an external memory is connected to the local data output unit 41, the synthesized data is stored in the memory. Therefore, it is necessary to efficiently collect data using a personal computer or the like and perform maintenance diagnosis. Can be.

[0051]

As described above, according to the present invention, an operator inputs information corresponding to a defect to the machine-side maintenance device in response to the problem, so that the machine-side maintenance device automatically enters the state from the work machine. Data is acquired and transmitted to the management unit maintenance device. Also, when transmission is not possible, the information is stored, and it is displayed at a glance that there is information that is not being transmitted, so that the maintenance staff of the management department can understand at the time of patrol, The maintenance state can be efficiently diagnosed by fully grasping the malfunction state of the work machine.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a maintenance device for a work machine according to an embodiment of the present invention.

FIG. 2 is a side view of a hydraulic shovel, which is a working machine according to the embodiment.

3 is a perspective view of a display unit of the management unit-side maintenance device 20 shown in FIG.

FIG. 4 is a perspective view of a case for storing a failure content switch group, a failure lamp, a transmission waiting reset button, and a display unit of the machine-side maintenance device 30 shown in FIG. 1;

FIG. 5 is a perspective view of a case different from FIG. 4 in which a failure content switch group, a failure lamp, a transmission waiting reset button, and a display unit of the machine-side maintenance device 30 shown in FIG. 1 are stored.

FIG. 6 is a diagram showing a comparison table stored in a defect content code storage unit 315 shown in FIG.

FIG. 7 is a diagram showing a comparison table stored in a defect content code storage unit 315 shown in FIG.

FIG. 8 is a diagram showing a comparison table stored in an operation instruction code storage unit 316 shown in FIG.

FIG. 9 is a diagram showing a comparison table stored in a data storage address storage unit 317 shown in FIG.

10 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.

11 is a transmission-failure data storage unit 31 shown in FIG.
FIG. 8 is a diagram showing data stored in a storage unit 8;

FIG. 12 is a flowchart illustrating a processing procedure of sensor data collection of the machine-side maintenance device 30.

FIG. 13 is a diagram illustrating a configuration of the maintenance device 30 from the maintenance device 30 on the machine side.
It is a flowchart which shows the communication process to which it is.

FIG. 14 is a diagram illustrating an example of installation of sensors installed in each part of the work machine.

[Explanation of symbols]

 Reference Signs List 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 failure content switch group 37 failure lamp 38 failure information display unit 39 waiting for transmission Reset button 40 Operation controller 41 Local data output unit

Claims (5)

[Claims] A failure information input unit that inputs failure information according to a failure of the work machine; a state data collection unit that collects state data of each part of the work machine according to the input failure information; A work machine maintenance device comprising: transmission means for transmitting the collected state data to the management unit side maintenance device, wherein when the work machine maintenance device cannot be normally transmitted to the management side maintenance device, A maintenance device for a working machine, comprising: data storage means for storing defect information and status data. 2. The maintenance device for a work machine according to claim 1, wherein the maintenance device for the work machine includes transmission disable display means for displaying that transmission to the management-side maintenance device cannot be performed normally. . 3. The method according to claim 1, wherein
The maintenance device for a work machine according to any one of claims 1 to 3, wherein the maintenance device for the work machine includes a display unit that displays a time when the defect information is input and the defect information. 4. The method according to claim 1, wherein
The maintenance device for a work machine according to claim 1, wherein the maintenance device for the work machine includes a data output unit that transfers data of the data storage unit to an external storage unit. 5. The maintenance device for a work machine according to claim 5, wherein the external storage unit is a memory provided in a computer.