Work machine

Abstract

To provide a work machine capable of achieving both a large increase and decrease in engine rotation speed and ease of fine adjustment.SOLUTION: In a work machine comprising a rotationally driven power unit, a work device that operates using the power unit as a power source, and an instruction device that instructs increasing and decreasing the rotational speed of the power unit, the instruction device has a first instruction device and a second instruction device, and the smallest unit of change in the rotational speed of the power unit that can be instructed by the first instruction device is different from the smallest unit of change in the rotational speed of the power unit that can be instructed by the second instruction device.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a work machine equipped with an indicating device capable of indicating the rotational speed of a power unit, such as an engine, which serves as a power source for operating a work device. [Background technology]

[0002] Hydraulic excavators and other work machines are equipped with an engine and a hydraulic pump, and the hydraulic oil is discharged from the hydraulic pump by the rotation of the engine, which drives each actuator installed in the work machine. The operator in the driver's seat can set the engine rotation speed to an appropriate level according to the work load.

[0003] Generally, the engine rotation speed is set via a dial-type input device as described in Patent Document 1. In the dial-type input device, the range in which the dial can be rotated is determined in advance. For example, when the dial is rotated to the limit position in the clockwise direction, the engine rotation speed becomes maximum, and conversely, when the dial is rotated to the limit position in the counterclockwise direction, the engine rotation speed becomes minimum. In addition, when the dial is set to a position between the limit positions, any rotation speed between the maximum rotation speed and the minimum rotation speed can be set according to the position. In such a dial-type input device, the minimum and maximum dial positions are used as a reference, so that the operator can intuitively set the engine rotation speed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-150965 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in a dial-type input device, the minimum and maximum engine speed values ​​corresponding to the dial's limit positions are generally set according to the specifications of the engine mounted on the work machine, etc. Therefore, if the rotatable range (movable range) of the dial is set wide, the change in engine speed relative to the amount of rotation of the dial becomes small, making it possible to fine-tune the engine speed, but in work that often involves large increases and decreases in engine speed, this can lead to reduced work efficiency and annoyance for the operator.

[0006] On the other hand, narrowing the rotatable range of the dial (movable range) increases the change in engine speed relative to the amount of rotation of the dial, making it possible to quickly increase or decrease the engine speed significantly, but is not suitable for fine adjustment of the engine speed. In this case, it is difficult to set an appropriate engine speed according to the work content, making it impossible to optimize the operating state of the work machine, and there is a concern that this may cause a deterioration in fuel efficiency.

[0007] SUMMARY OF THE PRESENT EMBODIMENTS Accordingly, an object of the present invention is to provide a work machine that is capable of achieving both large increases and decreases in engine rotation speed and ease of fine adjustment. [Means for solving the problem]

[0008] In order to solve the above problems, the working machine of the present invention is a working machine comprising a rotationally driven power unit, a working device that operates using the power unit as a power source, and an instruction device that instructs increasing and decreasing the rotational speed of the power unit, wherein the instruction device has a first instruction device and a second instruction device, and is characterized in that the smallest unit of change in the rotational speed of the power unit that can be instructed by the first instruction device is different from the smallest unit of change in the rotational speed of the power unit that can be instructed by the second instruction device. Effect of the Invention

[0009] According to the present invention, it is possible to achieve both a large increase or decrease in the rotation speed of the power unit and ease of fine adjustment. [Brief description of the drawings]

[0010] [Figure 1] 1 is a diagram showing the external appearance of a hydraulic excavator, which is an example of a work machine. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a diagram showing the appearance of an engine control dial. [Figure 4] FIG. 2 is a diagram showing an example of a display screen of a touch monitor. [Diagram 5] FIG. 13 is a diagram showing the positional relationship between the touch monitor and the engine control dial. [Figure 6] FIG. 1 is a diagram showing a system configuration of the present embodiment. [Figure 7] FIG. 13 is a diagram showing a process flow in a change request value calculation unit. [Figure 8] 13 is a diagram showing an example of a display screen of a touch monitor when the engine rotation speed is changed using the touch monitor. FIG. [Figure 9] 13 is a diagram showing an example of a display screen of the touch monitor when the engine rotation speed is changed using the engine control dial. FIG. [Figure 10] 13 is a diagram showing another example of the display screen of the touch monitor when the engine rotation speed is changed using the engine control dial. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings, showing an example of a work machine using the present invention.

[0012] Fig. 1 shows an overview of a hydraulic excavator 1, which is an example of a work machine. The hydraulic excavator 1 is composed of an articulated front working machine 1A consisting of a boom 1a, an arm 1b, and a bucket 1c, each of which rotates vertically, and a vehicle body 1B consisting of an upper rotating body 1d and a lower running body 1e. The upper rotating body 1d is attached to the top of the lower running body 1e so that it can rotate left and right. In addition, the upper rotating body 1d is equipped with a driver's cab 1f.

[0013] The base end of the boom 1a of the front working unit 1A is supported on the front part of the upper rotating body 1d. The boom 1a, arm 1b, bucket 1c, upper rotating body 1d and lower traveling body 1e are driven by the actuators of the boom cylinder 2a, arm cylinder 2b, bucket cylinder 2c, swing motor 3d and left and right traveling motors 3e, 3f, respectively.

[0014] The upper rotating body 1d is equipped with an engine 4, a pump 5, an electronically controlled valve 6, and the like for operating the hydraulic excavator 1. The pump 5 is driven by the rotation of the engine 4 and discharges hydraulic oil to each actuator. The electronically controlled valve 6 controls the operation of each actuator by changing the flow rate and flow direction of the hydraulic oil in response to an operation input from operation levers 8a, 8b, 8c, and 8d (see FIG. 2) provided in the operator's cab 1f. The rotation speed of the engine 4 (hereinafter referred to as engine rotation speed) is controlled by a control device 7, and the engine 4 can be driven at a preset minimum rotation speed to a preset maximum rotation speed (hereinafter referred to as between 800 and 2000 rpm). The higher the engine rotation speed, the greater the flow rate of hydraulic oil discharged from the pump 5, and the front working machine 1A can operate at a higher speed and with a higher horsepower.

[0015] Fig. 2 is a diagram showing the inside of the cab 1f. Electric operation levers 8a, 8b, 8c, and 8d are installed in the cab 1f. The operation levers 8a and 8b can be operated in four directions, forward, backward, left and right, and correspond to the operation of the front working implement 1A and the upper rotating body 1d (the boom cylinder 2a, arm cylinder 2b, bucket cylinder 2c, and swing motor 3d that operate them). The operation levers 8c and 8d can be operated in two directions, forward and backward, and correspond to the operation of the left and right traveling motors 3e and 3f attached to the lower traveling body 1e.

[0016] An engine control dial 9 is installed on the right front of the driver's cab 1f, and an arbitrary engine rotation speed can be set by rotating the dial. FIG. 3 is a diagram showing the appearance of the engine control dial 9. The engine control dial 9 is a rotary input device that can be rotated infinitely, and in this embodiment, has 24 operation steps per revolution. When the engine control dial 9 is rotated right 301, the engine rotation speed increases according to the amount of rotation (number of steps), and when the engine control dial 9 is rotated left 302, the engine rotation speed decreases according to the amount of rotation (number of steps). In other words, the engine control dial 9 is a dial-type indicating device that can indicate an increase or decrease in the engine rotation speed by rotating the dial.

[0017] A touch monitor 10 is also installed in the operator's cab 1f, which enables confirmation of the operating state of the hydraulic excavator 1 and setting operations. Fig. 4 is a diagram showing an example of the display screen of the touch monitor 10. On the display screen of the touch monitor 10, icons 401, 402, 403 indicating the setting state of the hydraulic excavator 1, instruments such as a fuel level gauge 404 and a water temperature gauge 405, a camera image 406 (obtained by a camera mounted on the vehicle body 1B or the like) for assisting the operator's field of vision, a clock 407, etc. are displayed.

[0018] Further, a meter 408 indicating the engine rotation speed is displayed at the bottom of the display screen of the touch monitor 10, and the engine rotation speed (800 to 2000 rpm) is displayed with 24 segments. Furthermore, touch buttons 409, 410 for increasing or decreasing the engine rotation speed are provided, and the engine rotation speed can be increased or decreased by tapping each touch button. That is, the touch buttons 409, 410 set or displayed on the touch monitor 10 are touch-type instruction devices that can instruct the engine rotation speed to increase or decrease by touch operation. Note that the meter 408 and the touch buttons 409, 410 may not be displayed all the time, but may be displayed only when the engine rotation speed is changed or when the operator performs a predetermined operation on the touch monitor 10.

[0019] 5 is a side view showing the positional relationship of each device. In this embodiment, the engine control dial 9 is disposed on the rear side of the operation lever 8b, and the touch monitor 10 (i.e., the touch buttons 409, 410) is disposed on the front upper side of the operation lever 8b. That is, the operation lever 8b is disposed between the engine control dial 9 and the touch buttons 409, 410. A linear distance 502 between the grip part 501 of the operation lever 8b and the engine control dial 9 is shorter than a linear distance 503 between the grip part 501 of the operation lever 8b and the touch buttons 409, 410 (in other words, the engine control dial 9 is disposed at a position closer to the operation lever 8b than the touch buttons 409, 410), and the operator can operate the engine control dial 9 more easily than the touch buttons 409, 410 when he is holding the operation lever 8b. In addition, when there are multiple operating devices (operating levers) as in this embodiment, it is desirable to arrange each device based on the representative operating device that is expected to be operated (held) most frequently during normal operation of the work machine and is located in the direction of the hand used when operating the engine control dial 9 or touch monitor 10.

[0020] 2, a shutoff lever 11 is provided on the left front side of the operator's cab 1f, and the operator switches the shutoff lever 11 to either the locked position or the unlocked position depending on the work status. When the shutoff lever 11 is in the locked position, the electronic control valve 6 is controlled so that the actuator does not operate, regardless of the operation of each of the operating levers 8a, 8b, 8c, and 8d.

[0021] 6 is a diagram showing the system configuration of this embodiment. Each input / output device is connected to a control device 7, which performs various controls such as inputting and outputting information to and from an operator and issuing operational commands to the vehicle body. The control device 7 is configured to include processes of a lever input determination unit 601, an operation feasibility determination unit 602, a valve control unit 603, a dial input determination unit 604, a touch input determination unit 605, a change request value calculation unit 606, an engine control unit 607, and a display control unit 608. The flow of processes in each processing unit will be described below.

[0022] The lever input determination unit 601 determines the amount of operation of the operating levers based on the electrical signals output from the operating levers 8a, 8b, 8c, and 8d, and outputs the result to the valve control unit 603. Also, the operation feasibility determination unit 602 detects the position (locked position or unlocked position) of the shut-off lever 11, determines whether the vehicle body is operable according to that state, and outputs the result to the valve control unit 603 and the change request value calculation unit 606. When the vehicle body is in an operable state, the valve control unit 603 calculates and outputs a control command value for the electronically controlled valve 6 according to the amount of operation of the operating levers 8a, 8b, 8c, and 8d.

[0023] The dial input determination unit 604 detects the operation of the engine control dial 9, and outputs the operation information to the change request value calculation unit 606. The operation information includes the rotation direction (right or left rotation) of the engine control dial 9 and the number of steps rotated.

[0024] The touch input determination unit 605 determines whether or not a tap operation has been performed on the touch buttons 409 and 410, and outputs the number of times each button has been operated to the change request value calculation unit 606. Note that when the touch buttons 409 and 410 are pressed and held down, the touch input determination unit 605 may determine that one tap operation has occurred per predetermined time period and output the result.

[0025] The change request value calculation unit 606 calculates a change request value for the rotation speed of the engine 4 in accordance with the operation of the touch buttons 409, 410 and the engine control dial 9, and outputs the calculated change request value to the engine control unit 607. FIG 7 is a diagram showing the flow of processing in the change request value calculation unit 606.

[0026] First, in step 606a, the CPU 10 acquires operation information of the touch buttons 409, 410 and the engine control dial 9. If the type of the acquired operation information is a tap operation on the touch buttons 409, 410, the CPU 10 proceeds to step 606b, where it determines the type of the touch button operated by the tap operation.

[0027] In step 606b, if the tapped touch button is touch button 409 for increasing the engine speed, the process proceeds to step 606c, where a change request value is calculated so as to increase the engine speed by 50 rpm per tap. If the acquired operation information includes multiple tap operations, a value is calculated by multiplying the minimum change request value (50 rpm) per tap by the number of tap operations, and the magnitude of the increase in engine speed is determined.

[0028] On the other hand, if the type of the tapped touch button in step 606b is touch button 410 for decreasing the engine rotation speed, the process proceeds to step 606d, where a change request value is calculated so that the engine rotation speed is decreased by 50 rpm per tap.

[0029] In step 606a, if the acquired operation information is a dial operation on the engine control dial 9, the process proceeds to step 606e, where the operable state of the vehicle body determined by the operable state determination unit 602 is acquired. If the vehicle body is in an inoperable state, the process proceeds to step 606f, where the rotation direction of the dial operation is determined. If the rotation direction of the dial operation is right rotation 301, the process proceeds to step 606c, where a change request value is calculated so that the engine speed is increased by 50 rpm per one step of the rotation amount. On the other hand, in step 606f, if the rotation direction of the dial operation is left rotation 302, the process proceeds to step 606d, where a change request value is calculated so that the engine speed is decreased by 50 rpm per one step of the rotation amount.

[0030] In step 606e, if the vehicle body is in an operable state, the process proceeds to step 606g, where the rotation direction of the dial operation is determined in the same manner as in step 606f. If the rotation direction of the dial operation is right rotation 301, the process proceeds to step 606h, where a change request value is calculated so that the engine speed is increased by 200 rpm per step of the amount of rotation.

[0031] In this case, the engine speed may be divided into 200 rpm intervals (800 / 1000 / 1200 / 1400 / 1600 / 1800 / 2000), and if the current engine speed does not fall into one of these intervals, the process may calculate a change request value so that the engine speed is increased from the current engine speed to the interval closest to the change direction for only the rotation operation corresponding to the first step among the input dial operations.

[0032] In step 606g, if the rotation direction of the dial operation is counterclockwise 302, the process proceeds to step 606i, where a requested change value is calculated so as to decrease the engine speed by 200 rpm per step of the amount of rotation, contrary to step 606h.

[0033] The requested change values ​​for the engine speed calculated in steps 606c, 606d, 606h, and 606i are output to the engine control unit 607 in step 606j, and the process of the requested change value calculation unit 606 is terminated.

[0034] The engine control unit 607 determines the rotation speed of the engine 4 in accordance with the change request value calculated by the change request value calculation unit 606, and controls the engine 4 so as to satisfy the determined rotation speed. Note that the engine rotation speed is determined comprehensively not only in accordance with the change request value calculated by the change request value calculation unit 606, but also in accordance with requests from various functions mounted on the hydraulic excavator, such as an auto-idle function that automatically reduces the engine rotation speed to a minimum rotation speed when the operating lever is not operated for a certain period of time or longer.

[0035] The display control unit 608 acquires the current engine rotation speed from the engine control unit 607, determines the number of segments of the meter 408 (FIG. 4) according to the engine rotation speed, and displays it on the touch monitor 10.

[0036] An example of the behavior of this embodiment will be described below. First, an example of changing the engine rotation speed using the touch monitor 10 will be described.

[0037] When the touch button 409 displayed on the touch monitor 10 for increasing the engine speed is tapped three times, the change request value calculation unit 606 performs the process in the order of steps 606a, 606b, and 606c, and determines a change request value for increasing the engine speed by 150 rpm. Note that, depending on the tap speed, the operation cycle of the control device, etc., a change request value for increasing the engine speed by 50 rpm may be output three times.

[0038] Fig. 8 is a diagram showing the change in meter 408 when engine control unit 607 increases the engine speed by 150 rpm in accordance with this change request value. If the engine speed before the change is 1100 rpm, the engine speed increases to 1250 rpm after the change, and the increase in engine speed can be confirmed by the fact that three segments (50 rpm / segment) change to an active color as shown in Fig. 8(B) compared to (A).

[0039] When changing the engine speed by tapping in this way, it is possible to change the engine speed in small increments (minimum change unit) of 50 rpm. This allows the operator to fine-tune the engine speed according to the type of work being done, and set an engine speed suitable for the work, allowing the operator to work efficiently without consuming more fuel than necessary.

[0040] Although the present embodiment shows an example in which a tap operation is used, the engine speed may be set using a different type of touch operation, such as a swipe operation using a slider bar. Also, in the present embodiment, the change amount of the engine speed by the tap operation is set to 50 rpm, but any value may be set depending on the characteristics of the work machine, etc.

[0041] Next, an example of changing the engine rotation speed using the engine control dial 9 will be described.

[0042] When the shutoff lever 11 is in an unlocked state and the hydraulic excavator 1 is in an operable state, if the engine control dial 9 is rotated 301 three steps to the right, the change request value calculation unit 606 proceeds through the processing of steps 606a, 606e, 606g, and 606h in that order, and a change request value is determined so as to increase the engine speed by 600 rpm.

[0043] 9 is a diagram showing the change in meter 408 when engine control unit 607 increases the engine speed by 600 rpm in accordance with this change request value. As in the example described above, if the engine speed before the change is 1100 rpm, the engine speed increases to 1700 rpm after the change, and 12 segments (50 rpm / segment) change to the active color as shown in (B) of FIG. 9 compared to (A).

[0044] Note that meter 408 may not only simultaneously reflect the change in engine speed as shown in (A) to (B) of FIG. 9, but may also sequentially reflect the amount of change for each step of dial operation, thereby clearly indicating the amount of change in engine speed corresponding to the dial operation.

[0045] Also, as in the above-mentioned specifications, the engine speed may be divided into 200 rpm intervals, and if the current engine speed does not fall within the intervals, the input dial operation that corresponds to the first step may be processed to increase the engine speed from the current engine speed to the closest interval.

[0046] At this time, assuming that the engine control dial 9 is rotated right 301 by three steps, the current engine speed is acquired and a change request value is calculated in step 606h of the change request value calculation unit 606. If the current engine speed is 1100 rpm, the closest division is 1200 rpm, so in the first step of the three-step dial operation, a change request value (100 rpm increase) is determined to increase the engine speed to 1200 rpm.

[0047] For the remaining two steps, the engine speed is increased by 200 rpm per step according to the prescribed process, and the change request value is determined to increase the engine speed by 400 rpm in total. Therefore, the change request value calculation unit 606 outputs a change request value to increase the engine speed by a total of 500 rpm. FIG. 10 shows the change in the meter 408 when these processes are performed. FIG. 10B shows the engine speed increasing to 1200 rpm by the operation of the first step (two segments change to active color compared to (A)), and FIG. 10C shows the engine speed increasing to 1600 rpm by the processing of the remaining two steps (eight more segments change to active color compared to (B)). Here, FIG. 10B is provided for the sake of explanation, but the transition from FIG. 10A to FIG. 10C may be made without passing through FIG. 10B.

[0048] In this way, by changing the engine speed according to divisions of the engine speed, the operator can easily intuitively understand the current engine speed.

[0049] As with the process described above, when the hydraulic excavator 1 is in an operable state, even when increasing the rotation speed from the minimum rotation speed (800 rpm) to the maximum rotation speed (2000 rpm), it only requires a maximum of six steps of rotating the engine control dial 9. Therefore, even if it becomes necessary to suddenly increase or decrease the engine rotation speed significantly during work, the engine rotation speed can be changed quickly.

[0050] Furthermore, if the shutoff lever 11 is in a locked state and the hydraulic excavator 1 is in an inoperable state, the change request value calculation section 606 determines to proceed from step 606e to step 606f.

[0051] Then, in step 606f, the process proceeds to step 606c or step 606d depending on the rotation direction of the dial operation, and the change request value is determined. The change request value is changed by 50 rpm per step, similar to the change in engine speed by tap operation. That is, in this embodiment, when the hydraulic excavator 1 is in an inoperable state, the minimum change request value per step by dial operation (initial change unit) is made to match the minimum change request value per tap by tap operation (minimum change unit) (50 rpm).

[0052] In situations where there is no need to instantly increase or decrease the engine rotation speed significantly, such as when the work machine is in a state where it is unable to operate, the amount of change in engine rotation speed per step (minimum change unit) is made smaller than when the work machine is in a state where it is able to operate (in this embodiment, this is made to match the amount of change in engine rotation speed per tap (minimum change unit)), making it possible to fine-tune the engine rotation speed.

[0053] In this embodiment, the engine control dial 9 is located closer to the operating lever 8b than the touch monitor 10. Therefore, when the work machine is in an inoperable state, the operator can make fine adjustments to the engine speed with the engine control dial 9 without having to reach for the touch monitor 10, thereby enabling work to be performed more efficiently.

[0054] As described above, in this embodiment, two engine speed setting devices (indicating devices) are provided: the engine control dial 9 and the touch monitor 10. By providing a difference in the minimum amount of change in engine speed that can be set from each setting device (indicating device), it is possible to achieve both large increases and decreases in engine speed and ease of fine adjustment, thereby improving work efficiency.

[0055] [summary] As described above, the work machine (hydraulic excavator 1) of this embodiment is a work machine equipped with a power unit (engine 4) that drives rotation, a work implement (front work implement 1A, etc.) that operates using the power unit as a power source, and an instruction device that gives instructions to increase and decrease the rotational speed of the power unit, wherein the instruction device has a first instruction device (engine control dial 9) and a second instruction device (touch buttons 409, 410 of a touch monitor 10), and the minimum increment of change in the rotational speed of the power unit that can be instructed by the first instruction device (200 rpm) is different from the minimum increment of change in the rotational speed of the power unit that can be instructed by the second instruction device (50 rpm).

[0056] In addition, the smallest increment of change in the rotational speed of the power unit (200 rpm) that can be instructed by the first indicating device is larger than the smallest increment of change in the rotational speed of the power unit (50 rpm) that can be instructed by the second indicating device, and the first indicating device (engine control dial 9) is provided in a position closer to the operating device (operating levers 8a, 8b, 8c, 8d) for operating the work implement (front work implement 1A, etc.) than the second indicating device (touch buttons 409, 410 of touch monitor 10).

[0057] In addition, the first indicating device (engine control dial 9) is a dial-type indicating device that can indicate the rotation speed of the power unit by a rotation operation, and the second indicating device (touch buttons 409, 410 of the touch monitor 10) is a touch-type indicating device that can indicate the rotation speed of the power unit by a touch operation.

[0058] In addition, when the work machine is in an inoperable state, the minimum unit of change in the rotational speed of the power unit that can be instructed by the first indicating device is made to match the minimum unit of change in the rotational speed of the power unit that can be instructed by the second indicating device.

[0059] Moreover, the operation device is disposed between the first instruction device (the engine control dial 9) and the second instruction device (the touch buttons 409, 410 of the touch monitor 10).

[0060] Moreover, the first instruction device (engine control dial 9) is disposed on the rear side of the operating device, and the second instruction device (touch buttons 409, 410 of the touch monitor 10) is disposed on the front side of the operating device.

[0061] The work machine (hydraulic excavator 1) according to this embodiment is equipped with a first indicating device and a second indicating device for indicating the rotational speed of the power unit (engine 4). By setting the minimum amount of change in rotational speed for each indicating device to a different value, it is possible to operate the indicating device appropriately for either a large increase or decrease in the rotational speed of the power unit or fine adjustment, thereby making it possible to efficiently set a target rotational speed.

[0062] In addition, by positioning the first indicating device, which has a larger minimum amount of change, closer to the operating device than the second indicating device, the rotational speed of the power unit can be quickly set even if it becomes necessary to suddenly increase or decrease the rotational speed of the power unit significantly while operating the work machine.

[0063] In addition, by making the first and second indicating devices indicating devices with different input formats, and further making the first indicating device, which has a large minimum amount of change, a dial-type indicating device that can be rotated, it is possible to set the rotational speed of the power unit quickly and without hesitation, even when it becomes necessary to instantly significantly increase or decrease the rotational speed of the power unit.

[0064] In addition, when the work machine is in an inoperable state, by reducing the minimum amount of change in rotational speed in the first indicating device, during non-working hours when it is unlikely that the rotational speed of the power unit will be increased or decreased instantaneously, it becomes possible to change the rotational speed of the power unit, including making fine adjustments, using only the first indicating device, thereby enabling work to be performed more efficiently.

[0065] As described above, according to this embodiment, by achieving both large increases and decreases in the rotational speed of the power unit and ease of fine adjustment, it becomes easy to set the rotational speed of the power unit suitable for the work, thereby improving work efficiency.

[0066] The configurations of the control device 7 and the functions and execution processes of the configurations may be realized in part or in whole by hardware (for example, by designing logic for executing each function in an integrated circuit). The configurations of the control device 7 may be implemented as programs (software) that are read and executed by an arithmetic processing device (for example, a CPU) to realize the functions of the configurations of the control device. Information related to the programs may be stored in, for example, semiconductor memories (flash memories, SSDs, etc.), magnetic storage devices (hard disk drives, etc.), and recording media (magnetic disks, optical disks, etc.).

[0067] In addition, in the above description of the embodiment, the control lines and information lines are those that are considered to be necessary for the description of the embodiment, but they do not necessarily show all the control lines and information lines related to the product. In reality, it can be considered that almost all components are connected to each other. [Explanation of symbols]

[0068] 1. Hydraulic excavator (working machine) 1A Front work machine 1B Body 1a Boom 1b Arm 1c Bucket 1d Upper rotating body 1e Undercarriage 1F Driver's cab 4 Engine (power unit) 5. Pump 6 Electronically Controlled Valves 7 Control Device 8a, 8b, 8c, 8d Operating lever (operating device) 9 Engine control dial (first indicator) 10 Touch Monitor 11 Shut-off lever 408 meters 409,410 Touch button (second pointing device) 601 Lever input determination unit 602 Operation possibility determination unit 603 Valve control section 604 Dial input judgment unit 605 Touch Input Judgment Unit 606 Change Request Value Calculation Unit 607 Engine control unit 608 Display control unit

Claims

1. A power device for rotating the device; a working device that operates using the power device as a power source; and and an instruction device for instructing an increase and decrease in the rotation speed of the power unit. The indicator device includes a first indicator device and a second indicator device, A work machine characterized in that the minimum unit of change in the rotational speed of the power plant which can be instructed by the first indicating device is different from the minimum unit of change in the rotational speed of the power plant which can be instructed by the second indicating device.

2. 2. The work machine according to claim 1, a minimum unit of change in the rotation speed of the power plant that can be indicated by the first indicating device is greater than a minimum unit of change in the rotation speed of the power plant that can be indicated by the second indicating device; A work machine characterized in that the first instruction device is provided at a position closer to an operation device for operating the work device than the second instruction device.

3. 3. The work machine according to claim 2, the first indicating device is a dial-type indicating device that can indicate the rotation speed of the power unit by a rotation operation, A work machine characterized in that the second instruction device is a touch-type instruction device that can indicate the rotation speed of the power plant by a touch operation.

4. 2. The work machine according to claim 1, A working machine characterized in that, when the working machine is in an inoperable state, the minimum unit of change in the rotational speed of the power unit that can be instructed by the first indicating device is made to coincide with the minimum unit of change in the rotational speed of the power unit that can be instructed by the second indicating device.

5. 3. The work machine according to claim 2, A work machine, characterized in that the operating device is disposed between the first indicating device and the second indicating device.

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