JP2584371Y2 - Excavator operation status grasping device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for ascertaining the operating time of each work in a construction machine, the load of a work machine, and the like, and more particularly to a device for ascertaining the operation status of a power shovel.

[0002]

2. Description of the Related Art Conventionally, in the case of maintenance and inspection of construction machines and the like, countermeasures have been taken by grasping the operation time by integration based on a service meter for displaying the operation time of the engine. On the other hand, among construction machinery,
Regarding how to apply a load to each work machine in the excavation work of the shovel, the operator makes a decision based on the excavation state, the sound of the engine, the sound of the hydraulic relief, etc., and turns on and off the operation lever in a timely manner. I'm coming.

[0003]

[Problems to be Solved by the Invention] However, in construction machines, it is sometimes too early or too late to carry out uniformly with an engine service meter due to the variety of uses. Was disqualified. In addition, because the frequency of the work is unknown,
For example, track crawling, crawler track loosening inspection, etc. remained.
Furthermore, the production side cannot accurately predict the life of each device because the work ratio is unclear. On the other hand, as for how to apply a load to the working machine, a considerable amount of learning is required until the operator fully utilizes the capability of the working machine to perform the work. Therefore, if the operator is not sufficiently proficient, release the hydraulic pressure.
And the like occur at a considerable frequency, and power loss and the like have become a problem.

In view of this, the present invention can accurately display the operation time of each work machine, for example, excavation, turning, traveling, etc. in the case of a power shovel, or can display the load applied to the work machine on a panel. It is an object of the present invention to provide a power shovel operating condition grasping device to solve the disadvantages of the prior art.

[0005]

As a means for solving the above-mentioned problems of the prior art, a first aspect of the present invention is to provide a pilot pressure control valve for controlling each operation of a power shovel, such as running / turning and a working machine, and the like. A shuttle valve connected to the control valve to turn on a hydraulic switch, an electric circuit of an integrator for operating time energized by turning on the hydraulic switch, an arithmetic unit for integrating the integrated time of each integrator, and an arithmetic unit 3. A pilot pressure control valve for controlling the operation of each work machine of the power shovel, and a pressure switch which is turned on by the hydraulic pressure of the control valve. And O of the pressure switch
A pressure sensor that is energized by N and detects a hydraulic load applied to each work machine, a calculation unit that collectively calculates the load pressure of each pressure sensor, and a display unit that displays the calculation result of the calculation unit as a pressure It is characterized by having done.

[0006]

According to the above construction, the operation time for each operation is displayed on the display unit in claim 1, and the magnitude of the load applied to the work machine is displayed on the display unit in claim 2.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of an operation time integrating device for each work according to the first aspect of the present invention, and FIG. 2 shows a work equipment load display device according to a second embodiment of the present invention. FIG.

Hereinafter, a first embodiment of the present invention will be described with reference to an embodiment shown in FIG. 1, and a second embodiment will be described with reference to an embodiment shown in FIG. A first aspect of the present invention is a pilot pressure control valve for controlling each operation of a power shovel such as traveling / turning and a working machine.
Shuttle valve 4 connected to hydraulic switches 5, 6, 7 to turn on hydraulic switches 5, 6, 7;
The electric circuits 11, 12, 13 of the integrators 8, 9, 10 of the operating time energized by N, an arithmetic unit 14 for integrating the integrated time of each integrator, and a display unit for displaying the arithmetic result of the arithmetic unit 14 15.

The pilot pressure control valve 1 is for traveling, 1a is for right traveling, 1b is for left traveling, 2 is for working equipment, 2a is a bucket, 2b is a boom, 2c is an arm. 3 is for turning. These pilot pressure control valves 1, 2 and 3 are provided with operating levers 16 provided for each valve.
Is operated, the pilot pressure is connected by the pilot circuits 19 and 20 so that the discharge pressure from the pilot pump 17 acts on, for example, the left or right of the main direction switching valve 18 for the boom (others are omitted because they are the same). I have. Therefore, when the pilot pressure of either of the pilot circuits 19 and 20 becomes high, the main direction switching valve 18 is switched, and the discharge oil from the main pump (not shown) is switched from the P port to the port A or B whichever is switched. To actuate the actuator (not shown). In the middle of each pilot circuit leading to these pilot pressure control valves 1, 2, 3 and each main direction switching valve, the shuttle valve 4 to which the hydraulic pressure on the pressure side always acts is provided so as to bypass. That is, for example, the operation lever 16 of the right running 1a
Is operated, the pilot pressure on the forward side increases. At this time, the pilot pressure on the reverse side is zero. Therefore, the hydraulic pressure on the forward side acts through the shuttle valve 4. The shuttle valve 4 is connected to a traveling hydraulic switch 5, a work implement hydraulic switch 6, and a turning hydraulic switch 7, so as to turn on the respective hydraulic switches. These hydraulic switches 5, 6, and 7 are connected to an integrator 8 for running operation time, an integrator 9 for working machine operation time, and an integrator 10 for turning time by electric circuits 11, 12, and 13, respectively. The power source in this case is the battery 21. Then, the totalization of the respective integrators is performed by the calculation unit 14, and the result is displayed on the display unit 15, but is displayed on the monitor of the cab (not shown). In the case of the embodiment, a partial view of the underbody 22, the upper revolving unit 23, the working machine 24, and the like is displayed on the display unit 15, and the operation time is displayed below the partial view.

Next, the operation will be described. First, when the running time is integrated, when the operating lever 16 of the pilot pressure control valve 1 is operated, the operated pilot pressure is passed through the pilot circuit to the main direction switching valve (which may be a running motor). At the same time, the hydraulic pressure flowing to the shuttle valve 4 turns on the traveling hydraulic pressure switch 5. As a result, the electric circuit 11 is energized, and the running operation time integrator 8 is operated. The operation unit 14 calculates the running operation time and displays the result under the undercarriage 22 of the display unit 15. Is done. Also, regarding the operating time of the working machine, the operating lever 16 of the pilot pressure control valve 2 is operated, so that the hydraulic pressure flowing to the shuttle valve 4 turns on the working machine hydraulic switch 6. As a result, the electric circuit 12 is energized, and the integrator 9 of the working machine operating time is operated. The calculating unit 14 calculates this and displays the result under the working machine operating time 23 on the display unit 15. Is displayed. Similarly, in the case of turning, the electric circuit 13 is energized when the turning hydraulic switch 7 is turned on, so that the turning operation time integrator 1 is turned on.
0 is activated, and the calculation unit 14 calculates this, and the result is displayed below the upper revolving unit 24 of the display unit 15 in the turning operation time. Therefore, no matter which operation lever 16 is operated, the operating time of the portion operated by this operation is accumulated and displayed.

Although the embodiment has been described with reference to the case of a power shovel, it is needless to say that the present invention can be applied to a case where a breaker, a crusher, or the like is provided as an attachment of a working machine.

According to a second aspect of the present invention, there are provided pilot pressure control valves 34, 35, 36 for controlling the operation of each of the working machines 31, 32, 33 of the power shovel, and the control valves 34, 3
Pressure switches 37, 3 that are turned on by hydraulic pressures 5, 36
8, 39, pressure sensors 40, 41, 42, which are energized by turning on the pressure switches 37, 38, 39 to detect hydraulic loads applied to the working machines 31, 32, 33, and pressure sensors 40, 41, 42 And a display unit 44 for displaying the calculation result of the calculation unit 43 as a pressure.

The pilot pressure control valve 34 is for the bucket 33, 35 is for the boom 31, and 36 is for the arm 32. These pilot pressure control valves 34, 35, 36
When the operation lever 46 provided on each valve is operated, the discharge pressure from the pilot pump 47
Are connected by pilot circuits 49 and 50 so as to act on either the left or right of the main direction switching valve 48. Therefore, when the pilot pressure of either of the pilot circuits 49 and 50 becomes high, the main direction switching valve 48 is switched, and the oil discharged from the main pump 51 is switched from the P port to the port which is switched to either A or B. And the bucket cylinder 52 is operated. The same applies to the main direction switching valve 53 for the boom 31 and the main direction switching valve 54 for the arm.
5. Operate the arm cylinder 56. However, the discharge oil of the main pump 57 is used for the arm. In the middle of each pilot circuit leading to the pilot pressure control valves 34, 35, 36 and each of the main direction switching valves 48, 52, 53, a shuttle valve 5 on which a hydraulic pressure always acts is provided.
8, 59 and 60 are provided so as to bypass each other. That is, when the operation lever 46 is operated, since the operated circuit pressure is high, this pressure comes out of each shuttle valve. These shuttle valves 58, 5
9 and 60 are pressure switches 3 for the bucket 33, respectively.
7, pressure switch 38 for boom 34, and arm 3
The two pressure switches 39 are connected to each other to turn on each pressure switch. These pressure switches 37, 38, 39 are connected to electric circuits 61, 62, 63, respectively, which lead to pressure sensors 40, 41, 42 for detecting the oil pressure from the respective cylinder extension sides.
The power supply in this case is the battery 64. The loads detected by these pressure sensors are collected by the calculation unit 43, and the result is displayed on the display unit 44, but is displayed on the monitor of the cab 45. In the case of the embodiment, the display unit 44 shows partial views 65 of the boom 31, the arm 32, the bucket 33, etc.
66 and 67 are respectively lit and displayed, and in the partial views, the lit color changes according to the load.

Next, the operation will be described. First, for example, when displaying the load applied to the bucket 33, the operating lever 46 of the pilot pressure control valve 34 is operated, and the pilot pressure on the operated side is set to the pilot circuit 48 or 50.
When the bucket cylinder 52 enters the operating state by operating on the main direction switching valve 48, the partial view 67 of the display unit 44 is lit, for example, in blue. At the same time, when the pressure switch 37 is turned on, the electric circuit 61 conducts the hydraulic pressure that has flowed through the shuttle valve 58, and the pressure sensor 40 starts detecting the hydraulic pressure of the bucket cylinder 52. If the pressure of the cylinder 52 becomes more than half of the relief set pressure to close to the relief set pressure during excavation, the lighting color changes to green,
Further, when the pressure becomes higher from near the relief set pressure, the light turns red. The lighting of the beams 31 and 32 on the display units 65 and 66 can be performed in the same manner as the bucket 33. For this reason, the operator can know that an extreme load is applied when the vehicle is lit in red, while staying in the cab. Note that the lighting color is an example, and is not limited to the embodiment.

[0015]

[Effects of the Invention] As described above, the present invention relates to claim 1
A pilot pressure control valve for controlling each operation of the power shovel, such as traveling / turning and a work machine, a shuttle valve connected to the control valve for turning on a hydraulic switch, and an operation time for energizing by turning on the hydraulic switch. 3. An electric circuit of the integrator, an operation unit for integrating the integration time of each integrator, and a display unit for displaying the operation result of the operation unit. Pressure control valve for controlling pressure, a pressure switch which is turned on by the hydraulic pressure of the control valve, and a pressure switch O
A pressure sensor that is energized by N and detects a hydraulic load applied to each work machine, a calculation unit that collectively calculates the load pressure of each pressure sensor, and a display unit that displays the calculation result of the calculation unit as a pressure Therefore, in claim 1, the conventional engine
It is possible to correct the maintenance and inspection time of each device that relies on a vismeter to a time that is appropriate for each device. It is also possible to grasp. According to claim 2, at the time of excavation,
By displaying the pressure on the display unit according to the magnitude of the load applied to the work machine, the power lever can be reduced by returning the operation lever to a position near the relief set pressure. Also,
Since the operation can be performed while aiming at the optimum range of the working function, the oil pressure can be effectively used even by an unskilled operator.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of an operation-by-operation operating time accumulating apparatus according to the first aspect of the present invention;

FIG. 2 is an explanatory view showing one embodiment of a work implement load display device according to the second aspect of the present invention;

[Explanation of symbols]

 1-3 Pilot pressure control valve 4 Shuttle valve 5-7 Hydraulic switch 8-10 Integrator 11-13 Electric circuit 14 Operation unit 15 Display unit 31-33 Work machine 34-36 Pilot pressure control valve 37-39 Pressure switch 40- 42 pressure sensor 43 calculation unit 44 display unit

Claims (2)

(57) [Scope of request for utility model registration] 1. A pilot pressure control valve for controlling each operation of a power shovel such as traveling / turning and a work machine, a shuttle valve connected to the control valve for turning on a hydraulic switch, and turning on the hydraulic switch. An operation of a power shovel, comprising: an electric circuit of an integrator for energizing operation time; an operation unit for integrating the operation time of each integrator; and a display unit for displaying the operation result of the operation unit. Status grasping device. 2. A pilot pressure control valve for controlling the operation of each work machine of the power shovel, a pressure switch which is turned on by the hydraulic pressure of the control valve, and a hydraulic pressure applied to each work machine which is energized by turning on the pressure switch. An operation of a power shovel, comprising: a pressure sensor for detecting a load; a calculation unit for collectively calculating a load pressure of each pressure sensor; and a display unit for displaying a calculation result of the calculation unit as a pressure. Status grasping device.