JP2024094060A - Work Machine - Google Patents

Abstract

To provide a work machine capable of simplifying the layout of multiple switches.SOLUTION: A work machine 100 includes: an undercarriage 1; an upper rotating body 3 mounted on the undercarriage 1 rotatably; an engine 11 mounted on the upper rotating body 3; and a cabin 10 mounted on the upper rotating body 3, which has a driving seat 50. In the cabin 10, a switch 35 for starting the engine 11 and a dial 32 for changing the output of the engine 11 are provided integrally.SELECTED DRAWING: Figure 4

Description

This disclosure relates to a work machine.

Work machines equipped with a dial switch for selecting a target engine speed are known (see, for example, Patent Document 1).

International Publication No. 2021/241591

The cabin is provided with multiple switches that are operated by the operator. There is a demand for simplifying the layout of the switches in a work machine that is provided with multiple switches. The present disclosure aims to provide a work machine that can simplify the layout of the multiple switches.

A work machine according to one aspect of the present disclosure includes a lower running body, an upper rotating body rotatably mounted on the lower running body, a drive source mounted on the upper rotating body, and a cabin mounted on the upper rotating body and having a driver's seat, and a switch for starting the drive source and a throttle for changing the output of the drive source are integrally provided inside the cabin.

The present disclosure provides a work machine that allows for simplified arrangement of multiple switches.

FIG. 2 is a side view of a shovel according to one embodiment. FIG. 2 is a diagram showing a configuration example of a basic system mounted on the excavator shown in FIG. 1 . FIG. 2 is a plan view showing the interior of the cabin. FIG. 2 is a perspective view showing a switch panel and its vicinity. FIG. 4 is a diagram showing an example of a home screen displayed on the display device. FIG. 13 is a diagram showing an example of a guide screen displayed on a display device. 11 is a flowchart showing the procedure of a process performed by a shovel. 11 is a flowchart showing the procedure of a process performed by a shovel.

Hereinafter, the embodiments will be described with reference to the attached drawings. To facilitate understanding of the description, the same components in each drawing are given the same reference numerals, and duplicate descriptions will be omitted.

In the attached drawings, the X-axis, Y-axis, and Z-axis are mutually orthogonal. Specifically, the X-axis extends along the front-rear axis of the work machine, the Y-axis extends along the left-right axis of the work machine, and the Z-axis extends along the shovel's rotation axis. In this embodiment, the X-axis and Y-axis extend horizontally, and the Z-axis extends vertically. If the posture of the work machine changes, the X-axis, Y-axis, and Z-axis change appropriately. The X-axis, Y-axis, and Z-axis may be in other directions.

A shovel 100 according to one embodiment of the present disclosure will be described. FIG. 1 is a side view of the shovel 100. The shovel 100 is an excavator and is an example of a work machine.

The excavator 100 includes a lower traveling body 1, a rotating mechanism 2, an upper rotating body 3, a boom 4, an arm 5, a bucket 6, a boom cylinder 7, an arm cylinder 8, an end attachment cylinder 9, and a cabin 10.

The upper rotating body 3 is mounted on the lower traveling body 1 so as to be able to rotate via a rotating mechanism 2. The upper rotating body 3 is attached with a boom 4. The arm 5 is attached to the tip of the boom 4, and a bucket 6 is attached to the tip of the arm 5 as an end attachment. The boom 4, the arm 5, and the bucket 6 constitute an excavation attachment as an example of an attachment AT. The boom 4 is driven by a boom cylinder 7, the arm 5 is driven by an arm cylinder 8, and the bucket 6 is driven by an end attachment cylinder 9. The upper rotating body 3 is provided with a cabin 10 which is a driver's room, and is equipped with an engine 11. The engine 11 is an example of a drive source. The drive source is not limited to an engine, and may be a motor. The drive source of the work machine may include an engine and a motor. The work machine may be driven only by an engine, may be a hybrid type driven by an engine and a motor, or may be an electric shovel (electric work machine) driven only by a motor.

Inside the cabin 10, an operating device 26, a display device 40, an alarm device 49, etc. are provided. For convenience, in this specification, the side of the upper rotating body 3 to which the working elements such as the boom 4 are attached is referred to as the front, and the side to which the counterweight is attached is referred to as the rear.

The controller 30 is configured to be able to control the excavator 100. The controller 30 is configured as a computer equipped with a CPU, RAM, NVRAM, and ROM. The controller 30 reads out a program corresponding to each functional element from the ROM, loads it into the RAM, and causes the CPU to execute the corresponding process. Each functional element may be configured as hardware, or as a combination of software and hardware.

The shovel 100 is provided with a communication device 31. The communication device 31 connects to a communication network external to the shovel 100, which may include, for example, a mobile communication network terminated in a base station, a satellite communication network using communication satellites in the sky, an Internet network, etc., and communicates with an external device.

The imaging device 80 is configured to capture images of the surroundings of the excavator 100. The imaging device 80 is, for example, a monocular camera, a stereo camera, a distance imaging camera, an infrared camera, a LIDAR, or the like. The imaging device 80 includes a rear camera 80B attached to the rear end of the upper surface of the upper rotating body 3, a left camera 80L attached to the left end of the upper surface of the upper rotating body 3, and a right camera 80R attached to the right end of the upper surface of the upper rotating body 3.

The rear camera 80B, left camera 80L, and right camera 80R are all attached to the upper rotating body 3 so that their optical axes face diagonally downward and so that a portion of the upper rotating body 3 is included in the imaging range. Therefore, the imaging range of each of the rear camera 80B, left camera 80L, and right camera 80R has a viewing angle of, for example, about 180 degrees when viewed from above.

The imaging device 80 may function as an object detection device that detects a predetermined object within a predetermined area around the shovel 100. The imaging device 80 may include an image processing device. The image processing device applies known image processing to an image (input image) captured by the imaging device 80 to detect an image of a predetermined object included in the input image. When an image of a predetermined object is detected, the imaging device 80 outputs an object detection signal to the controller 30. The predetermined object is, for example, a person, an animal, a vehicle, or a machine. The image processing device may be configured to detect a moving object. The image processing device may be integrated into the controller 30. The object detection device may be a LIDAR, an ultrasonic sensor, a millimeter wave sensor, a laser radar sensor, an infrared sensor, or the like.

The shovel 100 may be equipped with an object detection device (such as a LIDAR, a millimeter wave radar, or a stereo camera) in addition to the imaging device 80 (rear camera 80B, left camera 80L, and right camera 80R). The shovel 100 may display information about an object detected by the object detection device on the display device 40.

Next, the basic system installed in the shovel 100 will be described with reference to FIG. 2. FIG. 2 shows an example of the configuration of the basic system installed in the shovel 100 of FIG. 1. In FIG. 2, mechanical power transmission lines are indicated by double lines, hydraulic oil lines by thick solid lines, pilot lines by dashed lines, power lines by thin solid lines, and electrical control lines by dashed lines.

The basic system has a controller 30 and an ECU (engine control unit) 74. The basic system has the engine 11, main pump 14, pilot pump 15, control valve unit 17, and switching valve 18 as objects to be controlled. The basic system has an operating device 26, operating pressure sensor 29, dial 32, switch 35, gate lock lever 55, and key sensor 62 as input sections. The basic system has an alarm device 49 as an output section. The basic system has a display device 40 as a display section. The display device 40 serves as both an input section and an output section.

Engine 11 is a diesel engine that employs isochronous control to maintain a constant engine speed regardless of load changes. The fuel injection amount, fuel injection timing, boost pressure, etc. of engine 11 are controlled by ECU 74.

The engine 11 is connected to a main pump 14 and a pilot pump 15, which serve as hydraulic pumps. The main pump 14 is connected to a control valve unit 17 via a hydraulic oil line.

The control valve unit 17 is a hydraulic control device that controls the hydraulic system of the excavator 100. The control valve unit 17 is connected to hydraulic actuators such as the left traveling hydraulic motor, the right traveling hydraulic motor, the boom cylinder 7, the arm cylinder 8, the end attachment cylinder 9, and the swing hydraulic motor.

The control valve unit 17 includes multiple spool valves corresponding to each hydraulic actuator. Each spool valve is configured to be displaceable according to the pilot pressure so that the opening area of the PC port and the opening area of the CT port can be increased or decreased. The PC port is a port that connects the main pump 14 to the hydraulic actuator. The CT port is a port that connects the hydraulic actuator to the hydraulic oil tank.

The pilot pump 15 is connected to the operating device 26 via a pilot line. The operating device 26 includes, for example, a left operating lever 26A, a right operating lever 26B, and a travel operating device. The travel operating device includes, for example, a left travel pedal 26C, a right travel pedal 26D, a left travel lever 26E, and a right travel lever 26F. Each of the operating devices 26 is a hydraulic operating device and is connected to the pilot port of the corresponding spool valve in the control valve unit 17 via a pilot line. However, the operating device 26 may be an electric operating device.

The pilot pump 15 may be omitted. In this case, the function that was previously performed by the pilot pump 15 may be realized by the main pump 14. The main pump 14 may have a function of supplying hydraulic oil to the operating device 26, etc. after reducing the pressure of the hydraulic oil by throttling or the like, in addition to the function of supplying hydraulic oil to the control valve unit 17.

The operating pressure sensor 29 detects the operation of the operating device 26 in the form of pressure. The operating pressure sensor 29 outputs the detected value to the controller 30. However, the operation of the operating device 26 may also be detected electrically.

The switching valve 18 is configured to be able to switch between an enabled state and an disabled state of the operating device 26. The enabled state of the operating device 26 is a state in which the operator can operate the hydraulic actuator using the operating device 26. The disabled state of the operating device 26 is a state in which the operator cannot operate the hydraulic actuator using the operating device 26. The switching valve 18 is a gate lock valve configured to operate in response to a command from the controller 30. The switching valve 18 is disposed in a pilot line connecting the pilot pump 15 and the operating device 26, and is configured to be able to switch between blocking and connecting the pilot line in response to a command from the controller 30. For example, the operating device 26 is enabled when the gate lock lever 55 is pulled up to open the switching valve 18 (gate lock valve), and disabled when the gate lock lever 55 is pushed down to close the switching valve 18 (gate lock valve).

The display device 40 displays various information. The display device 40 may be connected to the controller 30 via a communication network such as a CAN, or may be connected to the controller 30 via a dedicated line. The display device 40 can display one or more captured images captured by the imaging device 80 and a menu screen. The display device 40 operates by receiving power from the storage battery 70. The display device 40 has a control unit 40a, an image display unit 42, and an operation unit 43.

The control unit 40a controls the images displayed on the image display unit 42. The control unit 40a is a computer equipped with a CPU, RAM, NVRAM, ROM, etc. The control unit 40a reads out a program corresponding to each functional element from the ROM, loads it into the RAM, and causes the CPU to execute the corresponding process. However, each functional element may be configured as hardware, or may be configured as a combination of software and hardware. In addition, the image displayed on the image display unit 42 may be controlled by the controller 30 or the imaging device 80.

The image display unit 42 displays an image captured by at least one of the imaging devices 80 and a menu screen. The captured image may be, for example, a rear image captured by the rear camera 80B, a left image captured by the left camera 80L, or a right image captured by the right camera 80R. The captured image may also be, for example, an overhead image obtained by combining images captured by the rear camera 80B, the left camera 80L, and the right camera 80R. The captured image may also be two or more images selected from the rear image, the left image, the right image, and the overhead image. The menu screen includes a status screen showing the status of the shovel 100 and a setting screen showing various settings of the shovel 100.

The operation unit 43 is a switch panel including hardware switches. The operation unit 43 may be a touch panel. The operation unit 43 is arranged below the image display unit 42, and includes a switch (e.g., a menu switch) for changing the image displayed by the image display unit 42. However, the arrangement of the operation unit 43 is not limited to the above example, and may be arranged, for example, on an operation lever, or on the left or right console of the seat on both the left and right sides of the driver's seat. Here, in addition to the operation unit 43 provided on the display device 40, a driver's seat side operation unit having the same function as the operation unit 43 may be arranged on at least one of the operation lever, the left console of the seat, and the right console of the seat.

Note that "the operation unit 43 may be a touch panel" is not limited to the meaning that only the operation unit 43 may be a touch panel. The display device 40 may be configured to allow input using a touch panel instead of the operation unit 43 having physical buttons. The image display unit 42 may be a touch panel that allows touch input. The image display unit 42, which is a touch panel, may include a function for touch input of information that can be input using the operation unit 43. The information that can be input using the touch panel is not particularly limited. The display device 40 may not include the operation unit 43 having physical buttons, but may include the image display unit 42, which is a touch panel. The display device 40 is merely an example and is not limited to the display device described here. Furthermore, the excavator 100 is not limited to one that includes the display device 40. A person skilled in the art can design the display device 40 as appropriate.

When the menu switch of the operation unit 43 is operated while the image display unit 42 is displaying the right image RG and rear image BG captured by the imaging device 80, the image display unit 42 displays a menu screen. For example, the image display unit 42 reduces the size of the rear image BG without changing the size of the right image RG before and after the menu switch of the operation unit 43 is operated, and displays a screen for selecting a detailed menu item. When a specific switch of the operation unit 43 is operated while the screen for selecting a detailed menu item is displayed, the image display unit 42 switches the rear image BG to a menu screen such as a status screen showing the status of the shovel 100 or a setting screen showing various settings of the shovel 100. At this time, the image display unit 42 displays the right image RG in a state where the size is maintained without being changed.

The image display unit 42 may display a menu screen when the menu switch of the operation unit 43 is operated, whether the shovel 100 is in an operable state or an inoperable state. The image display unit 42 may display a menu screen when the menu switch of the operation unit 43 is operated only when the shovel 100 is in an inoperable state. In addition, these may be configured to be switchable by a switching means such as a change-over switch. The state in which the shovel 100 is operable is, for example, a state in which the gate lock lever 55 is pulled up and the change-over valve 18 is opened, so that the operation device 26 is enabled. The state of the gate lock lever 55 at this time is called an unlocked state. The state in which the shovel 100 is inoperable is, for example, a state in which the gate lock lever 55 is pushed down and the change-over valve 18 is closed, so that the operation device 26 is disabled. The state of the gate lock lever 55 at this time is called a locked state.

The storage battery 70 is charged with electricity generated by, for example, the alternator 11a. The power of the storage battery 70 is also supplied to the controller 30, etc. For example, the starter 11b of the engine 11 is driven by the power from the storage battery 70 to start the engine 11.

The ECU 74 transmits data on the state of the engine 11, such as the cooling water temperature, to the controller 30. The regulator 14a of the main pump 14 transmits data on the swash plate tilt angle to the controller 30. The discharge pressure sensor 14b transmits data on the discharge pressure of the main pump 14 to the controller 30. The oil temperature sensor 14c, which is provided in the line between the hydraulic oil tank and the main pump 14, transmits data on the temperature of the hydraulic oil flowing through that line to the controller 30. The operating pressure sensor 29 transmits data on the pilot pressure generated when the operating device 26 is operated to the controller 30. The controller 30 stores these data in a temporary storage unit (memory) and can transmit them to the display device 40 when necessary.

The alarm device 49 is a device for attracting the attention of people involved in the work of the shovel 100. The alarm device 49 is, for example, composed of a combination of an indoor alarm device and an outdoor alarm device. The indoor alarm device is a device for attracting the attention of the operator of the shovel 100 in the cabin 10, and includes, for example, at least one of a sound output device, a vibration generating device, and a light emitting device provided in the cabin 10. The indoor alarm device may be the display device 40. The outdoor alarm device is a device for attracting the attention of workers working around the shovel 100, and includes, for example, at least one of a sound output device and a light emitting device provided outside the cabin 10. The sound output device as the outdoor alarm device includes, for example, a traveling alarm device attached to the bottom surface of the upper rotating body 3. The outdoor alarm device may also be a light emitting device provided on the upper rotating body 3. However, the outdoor alarm device may be omitted. For example, when the imaging device 80 functioning as an object detection device detects a specific object, the warning device 49 may notify a person working with the shovel 100 of that fact.

The key sensor 62 is a sensor that detects an electronic key for the excavator 100. The key sensor 62 detects an electronic key that is present in the vicinity of the key sensor 62. The key sensor 62 can detect an electronic key that is present, for example, inside the cabin 10. The key sensor 62 outputs a signal indicating that the electronic key has been detected to the controller 30. The key sensor 62 can detect the electronic key, for example, using short-range wireless communication such as Bluetooth (registered trademark).

The basic system includes a door switch 61. When the door switch 61 detects that the door of the cabin 10 is open, it outputs a signal indicating that the door has been opened. The control unit 40a of the display device 40 can detect whether the door is open or closed by detecting the signal output from the door switch 61. The controller 30 may also receive a signal output from the control unit 40a of the display device 40 to detect whether the door is open or closed.

Next, the interior of the cabin 10 will be described with reference to FIG. 3. FIG. 3 is a plan view showing the interior of the cabin 10. The excavator 100 includes a driver's seat 50, an operating device 26, and a display device 40, which are arranged inside the cabin 10. A boarding door is provided on the left side of the driver's seat 50. The operator can open the boarding door and enter the interior of the cabin 10.

The driver's seat 50 is located in the center of the cabin 10 in a plan view. The driver's seat 50 includes a seat portion 51 on which the operator sits and a backrest 52. The driver's seat 50 is a reclining seat, and the inclination angle of the backrest 52 is adjustable. A left armrest 53L is located on the left side of the driver's seat 50, and a right armrest 53R is located on the right side. The left armrest 53L and the right armrest 53R are rotatably supported by the backrest 52.

A console 54L is disposed on the left side of the driver's seat 50, and a console 54R is disposed on the right side. The consoles 54L and 54R extend along the front-rear direction of the driver's seat 50. The driver's seat 50 is slidable in the front-rear direction. The driver's seat 50 may be configured to be slidable in the front-rear direction together with the consoles 54L and 54R.

The left armrest 53L is disposed on the left console 54L. The right armrest 53R is disposed on the right console 54R. The left armrest 53L is disposed so as to cover a portion of the left console 54L in a plan view. The right armrest 53R is disposed so as to cover a portion of the right console 54R in a plan view.

The operating device 26 includes a left operating lever 26A, a right operating lever 26B, a left travel pedal 26C, a right travel pedal 26D, a left travel lever 26E, and a right travel lever 26F.

The left operating lever 26A is provided in front of the left console 54L. Similarly, the right operating lever 26B is provided in front of the right console 54R. An operator seated in the driver's seat 50 can operate the left operating lever 26A while holding the left operating lever 26A with his left hand, and can operate the right operating lever 26B while holding the right operating lever 26B with his right hand. An operator seated in the driver's seat 50 can operate the left operating lever 26A with his left hand to drive the arm cylinder 8 and the swing hydraulic motor. An operator seated in the driver's seat 50 can operate the right operating lever 26B with his right hand to drive the boom cylinder 7 and the end attachment cylinder 9. The bases of the left operating lever 26A and the right operating lever 26B are covered with lever boots 27.

The left travel pedal 26C and the right travel pedal 26D are located on the floor in front of the driver's seat 50. An operator seated in the driver's seat 50 can operate the left travel pedal 26C with his left foot to drive the left travel hydraulic motor. An operator seated in the driver's seat 50 can operate the right travel pedal 26D with his right foot to drive the right travel hydraulic motor.

The left travel lever 26E and the right travel lever are disposed between the left travel pedal 26C and the right travel pedal 26D in a plan view. The left travel pedal 26C and the right travel pedal 26D extend upward from the floor surface in front of the driver's seat 50. An operator seated in the driver's seat 50 can drive the left travel hydraulic motor by gripping and operating the left travel lever 26E with the left hand, in the same way as operating via the left travel pedal 26C. An operator seated in the driver's seat 50 can drive the right travel hydraulic motor by gripping and operating the right travel lever 26F with the right hand, in the same way as operating via the right travel pedal 26D.

The display device 40 is disposed in front of the right side of the driver's seat 50. The display device 40 displays various types of image information. The display device 40 is provided with a display device 33 that displays information such as the working conditions or operating state of the shovel 100. An operator seated in the driver's seat 50 can perform work using the shovel 100 while checking the various types of information displayed on the display device 40. The display device 40 may be provided with an operation unit 43.

A gate lock lever 55 is provided to the left of the driver's seat 50. When the gate lock lever 55 is pulled up, it is unlocked. This enables the hydraulic actuator to operate, and the operator can operate the shovel 100. When the gate lock lever 55 is pushed down, it is locked. This disables the hydraulic actuator to operate, and the operator cannot operate the shovel 100. In this way, the shovel 100 will not operate unless the operator sits in the driver's seat 50 and pulls up the gate lock lever 55, and the safety of workers and others working around the shovel 100 is maintained.

In addition, as described below, in the excavator 100, when the gate lock is in a locked state, a predetermined operation for starting the engine 11 can be accepted. In the excavator 100, when the gate lock is in an unlocked state, the engine 11 cannot be started.

A window console 56 is installed to the right of the console 54R. The window console 56 extends over the entire length of the cabin 10 in the fore-and-aft direction and is installed parallel to the console 54R. The display device 40 is installed in front of the window console 56. A radio 57 and other devices are installed in the window console 56. The radio 57 and other devices may be installed in the console 54L or the console 54R.

The excavator 100 is equipped with a switch panel 41 disposed inside the cabin 10. The switch panel 41 is disposed on the right console 54R. In a plan view, the switch panel 41 is disposed between the right operating lever 26B and the right armrest 53R.

Next, the switch panel 41 will be described in detail with reference to FIG. 4. FIG. 4 is a perspective view showing the switch panel and its vicinity.

The switch panel 41 includes a dial 32, a switch 35, and a guide 36. The switch 35 is circular and is an operation input unit that is pressed by an operator. The guide 36 is a cylinder. The center line of the guide 36 is arranged along the rotation axis C1. The switch 35 is arranged inside the guide 36. The switch 35 can be operated by pressing it in a direction along the rotation axis C1. The switch 35 can be displaced in a direction along the rotation axis C1.

The dial 32 is cylindrical and can rotate around the rotation axis C1. When viewed in the direction in which the rotation axis C1 extends, the dial 32 is arranged to surround the guide 36. The dial 32 can rotate along the outer circumferential surface of the guide 36. The dial 32 and the switch 35 are arranged on a cylindrical base 46 as shown in FIG. 4. The dial 32 is an example of a rotation operation unit that can rotate around an axis. The dial 32 is an example of a throttle that can change the output of the drive source. The dial 32 includes an encoder that can detect the rotation angle of the dial 32. The controller 30 detects the rotation angle of the dial 32 based on the output value of the encoder.

Guide 36 protrudes outward from the surface of switch 35 in the direction along rotation axis C1. The direction along rotation axis C1 is the direction in which switch 35 is pressed. The surface of switch 35 is the surface that is pressed by the operator. The upper end of guide 36 protrudes upward from switch 35. Switch 35 is positioned lower than the upper end of guide 36. This prevents the operator from accidentally touching switch 35.

The switch 35 is a switch used when starting the engine 11. The operator can start the engine 11 by pressing the switch 35. The controller 30 shown in FIG. 2 can start the engine 11 when the switch 35 is pressed by a first predetermined operation in a state where safety is ensured. The state where safety is ensured is a state where driving the engine 11 in this state does not cause danger to the excavator 100 or its surroundings. The state where safety is ensured is an example of a state where the conditions before the start of the drive source are satisfied. The controller 30 can determine whether or not the state is safe. For example, when the gate lock lever 55 is in a locked state and the lever (e.g., the lever or pedal of the operating device 26) is in a neutral position, the controller 30 can determine that the state is safe and that the conditions before the start of the drive source are satisfied. The state where the conditions before the start of the drive source are satisfied is not limited to this, and may be other states.

The first predetermined operation on the switch 35 is an example of the first operation. The first predetermined operation is a long press operation that continues for a length of time equal to or longer than a reference time. The controller 30 accepts the long press operation when the switch 35 is continuously pressed for a length of time equal to or longer than a reference time. The controller 30 can determine whether the switch 35 is long pressed in a state where safety is ensured. When the switch 35 is long pressed in a state where safety is ensured, the controller 30 can drive the engine 11. The ECU 74 may execute a part or all of the processing in the controller 30. The reference time may be any time. For example, depending on the temperature of the external environment of the excavator 100, the engine 11 may be easy to start in some cases, or difficult to start in other cases. For example, when starting the engine 11 in winter, it tends to be more difficult to start the engine 11 than in summer. The reference time for the long press operation may differ depending on the season, and may not always be the same length.

The first operation is not limited to the case where the switch 35 is continuously pressed for a length of time equal to or longer than a reference length. The first operation may be a double click on the switch 35. The first operation may be a long press on the switch 35 followed by a single click after the long press. When safety is ensured, the operator can operate the switch 35 with the first predetermined operation to drive the engine 11.

The switch 35 can be used for operations other than starting the engine 11. The switch 35 can be used as a switch for starting the ACC power supply. The operator can turn on the ACC power supply by pressing the switch 35. The controller 30 can start the ACC power supply when the switch 35 is operated by the second operation. The ACC power supply is an example of an accessory power supply that can supply current to electrical equipment mounted on the shovel 100. Examples of electrical equipment mounted on the shovel 100 include a light, a radio 57, an air conditioner, and a display device 40.

The second operation may be an operation different from the first operation. The first operation is a long press operation that continues for a length equal to or longer than the reference time, and the second operation is a single press operation that is shorter than the reference time. The first operation and the second operation are not limited to this. For example, the first operation may be a double click, and the second operation may be a single click. The second operation may be an operation simpler than the first operation. The operator can turn on the ACC power supply by performing the second operation on the switch 35. The second operation may be the same as the first operation. For example, the first operation may be a long press operation when the gate lock is in a locked state, and the second operation may be a long press operation when the gate lock is in an unlocked state.

The switch 35 is a switch used when stopping the engine 11. The operator can stop the engine 11 by pressing the switch 35. When the switch 35 is operated by the third operation while the engine 11 is running, the controller 30 can stop the engine 11. The third operation may be the same as the first operation or the second operation, or may be an operation different from the first operation and the second operation. The third operation may be a long press operation, a double click, or a single press operation. The third operation may be a press operation for a time shorter than the long press operation, which is the first operation, and longer than the single press operation, which is the second operation. When the engine 11 is running, the operator can stop the engine 11 by performing the third operation on the switch 35.

The dial 32 is an operation input unit that can rotate around an axis. The dial 32 outputs a signal according to the rotation position. When adjusting the target rotation speed of the engine 11, the operator can rotate the dial 32 to input the target rotation speed. The dial 32 transmits information indicating the setting state of the target rotation speed of the engine 11 to the controller 30. The dial 32 is configured to be able to switch the target rotation speed in ten steps from a first level (a level corresponding to the lowest target rotation speed) to a tenth level (a level corresponding to the highest target rotation speed). The ECU 74 controls the rotation speed of the engine 11 so that it becomes the target rotation speed selected by the dial 32.

Functions that are frequently used while the excavator 100 is in operation are assigned to the switches 41a to 41f. For example, the switches 41a to 41f are a travel switch, a backup circuit switch, a crane mode switch, a wiper switch, a light switch, and a windshield washer switch.

Switch 41a is a travel changeover switch for changing the travel speed. Switch 41b is a spare circuit changeover switch for changing the ON/OFF state of the hydraulic circuit for the special end attachment. The spare circuit changeover switch is a switch for changing the attachment.

Switch 41c is a crane mode switch for switching the crane mode ON and OFF. Switch 41d is a light switch for switching the work light ON and OFF. Switch 41e is a wiper switch for switching the wipers ON and OFF. Switch 41f is a windshield washer switch for spraying cleaning fluid onto the windshield. Switches 41a to 41f may be switches that are operated to perform other functions.

Switches 41a to 41f may be configured as push button switches capable of alternate operation, or may be configured as push button switches capable of momentary operation.

Switches 41a to 41f on switch panel 41 may have illustrations that indicate the functions assigned to each switch, and the illustrations may be configured to light up when each switch is in the on state.

Indicators 47a to 47f are provided on the top surface 45 of the switch panel 41. The indicators 47a to 47f are disposed near the switches 41a to 41f, respectively. The indicators 47a to 47f are switched between a lit state and an unlit state in response to the operation of the corresponding switch. For example, the indicator 47a is lit when the associated switch 41a is in the ON state, allowing the operator to recognize that the switch 41a is in the ON state. For example, when the switch 41d is in the ON state, the indicator 47d corresponding to the switch 41d is lit, and when the switch 41d is in the OFF state, the indicator 47d is unlit. The lit color of the indicators 47a to 47f is orange, but may be other colors such as blue, red, or yellow.

Switch 41e is a wiper switch, and the wiper operating speed changes in multiple stages depending on the number of times switch 41e is pressed. When the wipers are operating at low speed, only indicator 47e1 is lit, and when the wipers are operating at high speed, both indicators 47e1 and 47e2 are lit.

The controller 30 may be configured to execute different functions according to different operating methods of the switches 41a to 41f. For example, the controller 30 may lock the rotation operation of the shovel 100 when the switches 41a and 41d are pressed and held simultaneously. Alternatively, the controller 30 may cause the display device 40 to display information about a special end attachment when the switch 41b is pressed and held.

The shovel 100 may maintain the ON state of the switches 41a to 41f for a predetermined time after the engine 11 is stopped. At this time, the ACC power supply is maintained in the ON state. For example, the shovel 100 may maintain the ON state of the switch 41d for a predetermined time even if the engine 11 is stopped when the switch 41d is in the ON state and the work light is on. With this configuration, the shovel 100 can keep the work light on for a predetermined time even after the engine 11 is stopped. In this case, the work light continues to be on for a predetermined time without being immediately turned off after the engine 11 is stopped. Therefore, the shovel 100 can ensure the visibility of the surroundings when the driver gets off the cabin 10, thereby improving safety.

Next, the switches provided on the right operating lever 26B and the left operating lever 26A will be described. As shown in FIG. 4, a down switch 48ar, a right switch 48cr, and a left switch 48dr are provided on the rear side of the upper end of the right operating lever 26B. A trigger switch 48br is provided on the front side of the upper end of the right operating lever 26B.

The left operating lever 26A shown in FIG. 3 is also provided with a down switch 48al, a trigger switch 48bl, a right switch 48cl, and a left switch 48dl, similar to the right operating lever 26B.

The lower switch 48ar of the right operating lever 26B is assigned a one-touch idle function (a function for switching the engine 11 of the shovel 150 to idle operation). The trigger switch 48br is assigned a window washing function (a function for spraying window washer fluid and activating the wipers). The right switch 48cr is assigned a hands-free calling function (a function for enabling calls using a wirelessly connected smartphone), and the left switch 48dr is assigned a function for switching the air conditioner on and off.

The lower switch 48al of the left operating lever 26A is assigned a horn function. The trigger switch 48bl is assigned a mute function for the radio 57, etc. The right switch 48cl is assigned a function to switch an alarm sound (for example, an alarm sound output when an obstacle is detected) ON/OFF, and the left switch 48dl is assigned a function to switch the camera image displayed on the display device 33. The function assigned to the right switch 48cl may be assigned to the switches 41a to 41f of the switch panel 41 or the rocker switch 44.

The functions assigned to the left and right lever switches may be changed, for example, by operation via the display device 33.

Next, the other buttons and switches will be described with reference to FIG. 3. Functions that are used less frequently while driving are assigned to the operation unit 43 arranged on the display device 40. Functions assigned to the operation unit 43 include, for example, an air conditioner temperature adjustment function, an air conditioner air volume adjustment function, or a function for switching between the hour meter and the trip meter.

A rocker switch 44 is provided inside the cabin 10. The rocker switch 44 is located on the right console 54R. The rocker switch 44 is assigned a function that is used when a special end attachment such as a grapple or a lifting magnet is attached to the excavator 100. The rocker switch 44 may also be assigned a function such as switching a travel alarm on and off or switching an obstacle detection system on and off.

The signals output from the dial 32, the switch 35, the operation unit 43, the switches 41a to 41f, and the rocker switch 44 are sent to the controller 30. The controller 30 then executes various calculations based on those signals. However, the signals from the dial 32 and the switches 41a to 41f may also be sent to a microcomputer provided in the switch panel 41. In this case, the microcomputer provided in the switch panel 41 may be configured to execute various calculations based on those signals and transmit the results of the calculations to the controller 30. The microcomputer provided in the switch panel 41 and the controller 30 may be connected via a CAN.

Next, an example of the home screen 85 displayed on the display device 40 will be described with reference to FIG. 5. FIG. 5 is a diagram showing an example of the home screen 85 displayed on the display device 40. The home screen 85 is displayed on the image display unit 42 while the excavator 100 is in operation.

The image display section 42 includes a date and time display area 42a, a driving mode display area 42b, an attachment display area 42c, a fuel consumption display area 42d, an engine control status display area 42e, an engine operating time display area, a coolant temperature display area 42g, a remaining fuel amount display area 42h, an RPM level display area 42i, a remaining urea water amount display area 42j, a hydraulic oil temperature display area 42k, an air conditioner operating status display area, an image display area 42n, and a menu display area. The image display section 42 may include other display areas.

The travel mode display area 42b, the attachment display area 42c, the engine control status display area 42e, the RPM level display area 42i, and the air conditioner operation status display area are areas that display setting status information, which is information related to the setting status of the excavator 100. The fuel consumption display area 42d, the engine operating time display area, the cooling water temperature display area 42g, the remaining fuel amount display area 42h, the remaining urea water amount display area 42j, and the hydraulic oil temperature display area 42k are areas that display operating status information, which is information related to the operating status of the excavator 100.

The date and time display area 42a is an area that displays the current date and time. The driving mode display area 42b is an area that displays the current driving mode. The attachment display area 42c is an area that displays an image representing the currently attached attachment. The fuel efficiency display area 42d is an area that displays fuel efficiency information calculated by the controller 30. The fuel efficiency display area 42d includes an average fuel efficiency display area 42d1 that displays the lifetime average fuel efficiency or the section average fuel efficiency, and an instantaneous fuel efficiency display area 42d2 that displays the instantaneous fuel efficiency.

The engine control status display area 42e is an area that displays the control status of the engine 11. The engine operating time display area is an area that displays the cumulative operating time of the engine 11. The coolant temperature display area 42g is an area that displays the current temperature state of the engine coolant. The remaining fuel amount display area 42h is an area that displays the remaining amount of fuel stored in the fuel tank.

The rotation speed level display area 42i is an area that displays the current level set by the dial 32 as an image. A number indicating the selected level is displayed in the rotation speed level display area 42i. The "1" displayed in the rotation speed level display area 42i indicates that the selected rotation speed level is the "first level". The number "n" displayed in the rotation speed level display area 42i indicates that the selected rotation speed level is the "nth level". "n" is a natural number. When the operator rotates the dial 32, the number displayed in the rotation speed level display area 42i changes.

The urea water remaining amount display area 42j is an area that displays the remaining amount of urea water stored in the urea water tank as an image. The hydraulic oil temperature display area 42k is an area that displays the temperature of the hydraulic oil in the hydraulic oil tank.

The image display area 42n is an area that displays the image captured by the imaging device 80. The right image RG and the rear image BG are displayed in the image display area 42n. The right image RG is an image that shows the space to the right of the shovel 100, and includes an image of the right end of the top surface of the upper rotating body 3. The right image RG is a real viewpoint image generated by the control unit 40a, and is generated based on an image acquired by the right camera 80R. The rear image BG is an image that shows the space behind the shovel 100, and includes an image of the counterweight. The rear image BG is a real viewpoint image generated by the control unit 40a, and is generated based on an image acquired by the rear camera 80B.

The image display area 42n has a first image display area 41n1 located above and a second image display area 41n2 located below. The right image RG is displayed in the first image display area 41n1, and the rear image BG is displayed in the second image display area 42n2.

The image display area 42n may be configured to display an overhead image. The overhead image is a virtual viewpoint image generated by the control unit 40a, and is generated based on images acquired by the rear camera 80B, the left camera 80L, and the right camera 80R. A shovel figure corresponding to the shovel 100 may be placed in the center of the overhead image. This is to allow the operator to more intuitively grasp the positional relationship between the shovel 100 and objects present around the shovel 100. The image display area 42n may be configured to simultaneously display at least two of the overhead image, the left image, the right image RG, and the rear image BG.

The first image display area 42n1 may display an overhead image, and the second image display area 42n2 may display a rear image BG and a right image RG. In this case, the rear image BG may be disposed on the left side of the second image display area 42n2, and the right image RG may be disposed on the right side of the second image display area 42n2.

The left image and the right image RG may be displayed in the first image display area 42n1, and the rear image BG may be displayed in the second image display area 42n2. The image display area 42n may be a vertically elongated area, or the image display area 42n may be a horizontally elongated area.

Next, an example of the guidance screen 86 displayed on the display device 40 will be described with reference to FIG. 6. FIG. 6 is a diagram showing an example of the guidance screen 86 displayed on the display device 40. The excavator 100 is equipped with a display device 40 that displays how to operate the switch 35. The display device 40 displays the guidance screen 86. The guidance screen 86 is displayed after the operator opens the door and enters the cabin 10, but before the system is started. Before the system is started includes before the ACC power source is started and before the engine 11 is started.

The image display unit 42 includes a system startup guide display area 86a and an engine startup guide display area 86b. In the system startup guide display area 86a, an image showing the operation method when starting the system is displayed. The images showing the operation method when starting the system include an image 91 showing the dial 32, an image 92 showing the switch 35, an image 93 showing the operator's finger, an image 94 that gives an image of system startup, and an image 95 that gives an image of the operator's finger pressing the switch 35. The images showing the operation method when starting the system may include other characters and figures. The image 95 that gives an image of the operator's finger pressing the switch 35 may be, for example, a plurality of straight lines extending radially from the fingertip. The image 95 is not limited to a plurality of straight lines extending radially from the fingertip. The image 95 may be other images, and a person skilled in the art can appropriately devise it. In addition, the image showing the operation method when starting the system is not limited to this. A person skilled in the art can appropriately devise an image showing the operation method when starting the system. For example, a video may be displayed as an image showing the operation method when starting the system, and audio may be output simultaneously with the image. The image showing how to start the system may also include text information.

In the engine start guidance display area 86b, an image showing the operation method when starting the engine 11 is displayed. The image showing the operation method when starting the engine 11 includes an image 91 showing the dial 32, an image 92 showing the switch 35, an image 93 showing the operator's finger, an icon 96 that evokes the engine 11, and an image 97 that evokes the operator's finger pressing the switch 35. The image showing the operation method when starting the engine 11 may include other characters and figures. The image 97 that evokes the operator's finger pressing the switch 35 may be, for example, a plurality of concentric circles centered on the fingertip. The image 97 is not limited to a plurality of concentric circles centered on the fingertip. The image 97 may be other images, and can be appropriately devised by a person skilled in the art. By visually checking such a guidance screen 86, the operator can easily understand the operation method when starting the system and the operation method when starting the engine 11. This suppresses the operator from operating erroneously. In addition, the image showing the operation method when starting the engine 11 is not limited to this. Those skilled in the art can appropriately devise an image showing the operation method when starting the engine 11. For example, a video may be displayed as an image showing the operation method when starting the engine 11, or audio may be output simultaneously with the image. The image showing the operation method when starting the system may include text information.

Next, the procedure of the process performed by the shovel 100 will be described with reference to FIG. 7A. FIG. 7A is a flow chart showing the procedure of the process performed by the shovel 100. The process shown in FIG. 7A is started when the operator enters the cabin 10. The process shown in FIG. 7A is executed before the engine 11 is started, during the engine 11 is started, and when the engine 11 is stopped. The controller 30 shown in FIG. 2 executes the process shown in FIG. 7A. The ECU 74 and the control unit 40a execute part of the process shown in FIG. 7A.

The control unit 40a of the display device 40 determines whether or not the opening of the door of the cabin 10 has been detected (step S11). When the door switch 61 detects the opening of the door, it outputs a signal indicating that the opening of the door has been detected. The control unit 40a determines whether or not the opening of the door has been detected based on the signal output from the door switch 61. When the control unit 40a detects the opening of the door (step S11; YES), it proceeds to step S12. When the control unit 40a does not detect the opening of the door (step S11; NO), it repeats the process of step S12 and proceeds to step S12 after waiting for the detection of the opening of the door.

In step S12, the control unit 40a activates the image display unit 42 and causes the image display unit 42 to display the guidance screen 86.

In step S13, the controller 30 determines whether or not a key has been detected. If the key sensor 62 detects a key, it outputs a signal indicating that a key has been detected. The controller 30 determines whether or not a key has been detected based on the signal output from the key sensor 62. If the controller 30 detects a key (step S13; YES), it proceeds to step S14. If the controller 30 does not detect a key (step S13; NO), it repeats the process of step S13, waits for the detection of a key, and then proceeds to step S14.

In step S14, the controller 30 determines whether the gate lock is in a locked state. The controller 30 determines whether the gate lock is in a locked state based on the position of the gate lock lever 55. If the gate lock is in a locked state (step S14; YES), the controller 30 proceeds to step S17, and if the gate lock is not in a locked state (step S14; NO), the controller 30 proceeds to step S15.

In step S15, the controller 30 determines whether or not a long press operation on the switch 35 has been received. The controller 30 determines whether or not the switch 35 has received a long press operation based on a signal output from the switch 35. The controller 30 accepts a long press operation when the switch 35 is pressed for a length of time equal to or longer than a reference time. If the controller 30 has accepted a long press operation on the switch 35 (step S15; YES), the controller 30 proceeds to step S16. If the controller 30 has not accepted a long press operation on the switch 35 (step S15; NO), the controller 30 returns to step S14.

In step S16, the ACC power supply is started. The start-up of the ACC power supply may be the same as or different from the start-up of the system. The range to which current is supplied by starting the ACC power supply and the range to which current is supplied by starting the system may be the same or different. The system is started up by executing the process of step S16. After executing the process of step S16, the controller 30 returns to step S14 and waits for the gate lock to enter a locked state (step S14; YES) before proceeding to step S17.

In step S17, the controller 30 determines whether or not a long press operation on the switch 35 has been received. Based on a signal output from the switch 35, the controller 30 determines whether or not the switch 35 has received a long press operation. If the switch 35 has been pressed for a length of time equal to or longer than a reference time, the controller 30 accepts the long press operation. If the controller 30 has accepted a long press operation on the switch 35 (step S15; YES), the controller 30 proceeds to step S18.

If the controller 30 has not received a long press of the switch 35 (step S1; NO), it returns to step S15 and repeats the process. If the gate lock is in the locked state (step S14; YES) and the controller 30 has received a long press of the switch 35 (step S17; YES), it proceeds to step S18. If the gate lock is not in the locked state (step S14; NO) and the controller 30 has received a long press of the switch 35 (step S15; YES), it starts up the ACC power supply as described above.

In step S18, the controller 30 starts the engine 11. The controller 30 outputs a command signal to the ECU 74, and the ECU 74 starts the engine 11 based on the command signal. After executing the process of step S18, the controller 30 proceeds to step S19. If the ACC power supply is not started before the start of the engine 11, the engine 11 is started after the ACC power supply is started (after the system is started).

In step S19, the controller 30 determines whether or not a double click has been received. If the controller 30 has received a double click operation on the switch 35 (step S19; YES), the controller 30 proceeds to step S22. If the controller 30 has not received a double click operation on the switch 35 (step S19; NO), the controller 30 repeats step S19 and waits for a double click to be received (step S19; YES), and then proceeds to step S22.

In step S22, the controller 30 determines whether or not five seconds have passed since accepting the double-click. After accepting the double-click, the controller 30 waits for five seconds to pass (step S22; YES) and proceeds to step S25. If five seconds have not passed since accepting the double-click (step S22; NO), the controller 30 proceeds to step S23.

In step S23, the controller 30 determines whether or not a single press has been accepted. If the controller 30 accepts a single press operation on the switch 35 (step S23; YES), the controller 30 proceeds to step S24. If the controller 30 has not accepted a single press operation on the switch 35 (step S23; NO), the controller 30 returns to step S22, waits for five seconds to elapse after accepting a double click (step S22; YES), and proceeds to step S25.

In step S24, the controller 30 keeps the ACC power ON. After the controller 30 receives a double click on the switch 35 (step S19; YES), if the controller 30 receives a single press on the switch 35 within 5 seconds (step S23; YES), the controller 30 keeps the ACC power ON without turning it OFF. After executing the process of step S24, the controller 30 proceeds to step S25.

In step S25, the controller 30 stops the engine 11. The controller 30 outputs a command signal to the ECU 74, and the ECU 74 stops the engine 11 based on the command signal. After the controller 30 receives a double click on the switch 35 (step S19; YES), if the controller 30 receives a single press on the switch 35 within 5 seconds (step S23; YES), the controller 30 stops the engine 11 (step S25) while keeping the ACC power ON (step S24). If the operator wants to continue using the ACC power after stopping the engine 11, the operator can simply double click the switch 35 and then single press it.

For example, after stopping the engine 11, the user can stay inside the cabin 10 with the air conditioner and radio 57 running. For example, if the ACC power is turned ON after stopping the engine 11, the initial screen (setup screen) displayed when the system is started may be displayed again. In such a case, the operator may feel annoyed, but by deciding to keep the ACC power ON before stopping the engine 11, the operator can avoid feeling annoyed.

After the controller 30 receives a double click on the switch 35 (step S19; YES), if it does not receive a single press within 5 seconds (step S23; NO), it stops the engine 11 (step S25) and turns off the ACC power. Here, the controller 30 stops the engine 11 and stops the system.

After executing the process of step S25, the controller 30 ends the process here.

Next, the procedure of the process performed by the excavator 100 will be described with reference to FIG. 7B. The process shown in FIG. 7B is basically a process that is performed before the engine 11 is started. In the description of the process shown in FIG. 7B, the same process as in FIG. 7A is given the same step number, and the description may be omitted.

In FIG. 7B, the processes from step S11 to step S13 are the same as those in FIG. 7A. After executing the process of step S13, the controller 30 proceeds to step S34. In step S34, the controller 30 determines whether or not a single push operation (second operation) on the switch 35 has been accepted. If the controller 30 has accepted a single push operation on the switch 35 (step S34; YES), the controller 30 proceeds to step S16 and starts the ACC power supply. If the controller 30 has not accepted a single push operation on the switch 35 (step S34; NO), the controller 30 waits for a single push operation, proceeds to step S16, and starts the ACC power supply. After entering the cabin 10, the operator can start the ACC power supply by single pushing the switch 35.

After executing step S16, the controller 30 proceeds to step S35. In step S35, the controller 30 determines whether or not a single press operation on the switch 35 has been received. If the controller 30 has received a single press operation on the switch 35 (step S35; YES), the controller 30 proceeds to step S36. If the controller 30 has not received a single press operation on the switch 35 (step S35; NO), the controller 30 proceeds to step S14.

In step S14, the controller 30 determines whether the gate lock is in a locked state. If the gate lock is in a locked state (step S14; YES), the controller 30 proceeds to step S17. If the gate lock is not in a locked state (step S14; NO), the controller 30 returns to step S35, waits for a single push operation on the switch 35, and proceeds to step S36.

In step S17, the controller 30 determines whether or not a long press operation on the switch 35 has been received. If the controller 30 has received a long press operation on the switch 35, the process proceeds to step S18, where the engine 11 is started (A), and the process proceeds to step S19 shown in FIG. 7A. If the controller 30 has not received a long press operation on the switch 35 (step S17; NO), the process returns to step S35, waits for a single press operation on the switch 35, and proceeds to step S36.

In step S36, the controller 30 stops the ACC power supply. The controller 30 stops the supply of current to the electrical equipment of the shovel 100. The controller 30 stops the system in the shovel 100. When the controller 30 receives a single push operation on the switch 35 while the ACC power supply is activated (step S35; YES), the controller 30 stops the ACC power supply (step S36). The operator can stop the ACC power supply by performing a single push operation on the switch 35 while the ACC power supply is activated. After executing the process of step S36, the controller 30 ends the process here.

[Prior Art]
Next, the conventional technology will be described. A work machine according to the conventional technology is provided with a dial-type throttle operating unit for changing a target value of the engine speed. Also, in the work machine according to the conventional technology, a button (push switch) for starting the engine is provided near the dial-type throttle operating unit. An operator can start the engine by pressing the button for starting the engine. In the conventional technology, the button for starting the engine and the dial-type throttle operating unit are located separately.

In conventional work machines, multiple switches and buttons are provided inside the cabin, and there is a demand for space-saving arrangement of the switches and buttons. Furthermore, in conventional work machines, if the button for starting the engine is pressed by mistake while the engine is running, there is a risk that the engine will be stopped against the operator's will. When multiple switches and buttons are arranged close together, there is a demand for preventing erroneous operation by the operator and improving the reliability of the work machine.

[Functions and Effects of the Shovel 100 According to the Embodiment]
In the shovel 100 according to this embodiment, a switch 35 for starting the engine (driving source) 11 and a dial (throttle) 32 for changing the output of the engine 11 are integrally provided inside the cabin 10. In such an shovel 100, the switch 35 and the dial 32 can be provided close to each other. Therefore, in the shovel 100, the arrangement of the switches can be simplified. In the shovel 100, the area in which the switches are arranged can be saved in space. When multiple switches are arranged in a complex manner, there is a risk of erroneous operation. However, in the shovel 100, the arrangement of the switches is simplified, thereby reducing the risk of erroneous operation.

Note that "the switch 35 and the dial 32 are provided integrally" includes the case where the switch 35 is provided inside the dial 32, may include the case where the switch 35 is provided next to the dial 32, or may include, for example, the switch 35 provided so as to surround the dial 32. Note that the case where the switch 35 and the dial 32 are provided separately is not included in "the switch 35 and the dial 32 are provided integrally."

In the shovel 100, the engine 11 can be started and the engine speed can be changed by operating the switch 35 and the dial 32. The operator can intuitively operate the switch 35 and the dial 32, which are integrally provided, and the operability of the shovel 100 can be improved.

In the shovel 100, the switch 35 and the dial 32 are provided integrally, which allows for a reduction in the number of parts. In the shovel 100, the switch 35 and the dial 32 are provided integrally, which allows for greater freedom in the placement of the switch.

In the shovel 100, when the pre-start condition is satisfied, the engine 11 can be started when the switch 35 is pressed and held (first operation). The controller 30 can determine that the pre-start condition is satisfied when the safety of the shovel 100 is ensured. With this shovel 100, the safety of the shovel 100 is ensured as a pre-start condition, and further, when the switch 35 is pressed and held, the engine 11 can be started. This prevents the engine 11 from being started erroneously in the shovel 100.

The state in which the pre-start conditions are met includes, for example, a state in which safety is ensured. The state in which safety is ensured includes, for example, a state in which the gate lock lever 55 is in a locked state and a lever (for example, a lever or pedal of the operating device 26) is in neutral. The state in which safety is ensured does not include, for example, a state in which starting the engine 11 in that state may cause a malfunction unintended by the operator. In addition, for example, the state of the ground on which the shovel 100 is located, the weather, etc. may be taken into consideration to determine whether or not safety is ensured. In addition, the controller 30 may determine whether or not safety is ensured based on a combination of the detection results from various sensors and operations based on the operator's intention. A person skilled in the art can appropriately determine whether or not safety is ensured.

In the shovel 100, when the switch 35 is operated by a single push (second operation), an accessory power supply capable of supplying current to electrical equipment can be started. With the shovel 100 configured in this way, the engine 11 and the accessory power supply can be started based on different operations on the switch 35. Therefore, the shovel 100 can accept multiple instructions from the operator without installing a dedicated switch. In the shovel 100, the accessory power supply can be started by performing the second operation using the switch 35 used to start the engine 11. In the shovel 100, an increase in the number of switches can be suppressed, and the area in which the switches are arranged can be saved. In the shovel 100 configured in this way, when the switch 35 is operated by a single push, power is supplied to the starter 11b of the engine 11.

In the excavator 100, when the switch 35 is double-clicked (third operation) while the engine 11 is running, the engine 11 is stopped. In the excavator 100 configured as described above, when the switch 35 is double-clicked (third operation) different from the long press operation (first operation) during engine start-up, the engine 11 can be stopped. By making the operation for starting the engine 11 different from the operation for stopping the engine 11, it is possible to suppress erroneous operation by the operator. According to this excavator 100, the engine 11 is stopped in response to a more complicated operation than when the switch 35 is touched by mistake, and it is possible to prevent the engine 11 from being erroneously stopped while the engine 11 is running.

The shovel 100 is equipped with a display device 40 that displays how to operate the switch 35. In the shovel 100 configured as described above, the display device 40 is used to display how to operate the switch 35, making it possible to clearly communicate how to operate the switch 35 to the operator. This makes it possible to prevent erroneous operation. The shovel 100 can provide an easy-to-understand UI (user interface) to an operator who is operating the shovel 100 for the first time, thereby reducing the operator's anxiety and improving work efficiency.

In the shovel 100, the switch 35 is a button that is operated by pressing it, and the throttle that is integral with the switch has a dial 32 that is a rotary operation part that can rotate around an axis. In the shovel 100, the switch 35 can be operated by pressing the switch 35, and the dial 32 that is integral with the switch 35 can be operated by rotating the dial 32.

The shovel 100 further includes a guide 36 which is a cylinder, the switch 35 is disposed within the guide 36 and can be operated by pressing in a direction along the rotation axis C1 of the guide 36, and the dial 32 is disposed to surround the guide 36 and can rotate along the outer circumferential surface of the guide 36. In the shovel 100 having this configuration, the switch 35 can be disposed inside the guide 36, and the dial 32 can be disposed outside the guide 36. By rotating the dial 32 which rotates along the outer circumferential surface of the guide 36, the target value of the engine 11 rotation speed can be changed using the dial 32.

In the excavator 100, the guide 36 protrudes outward from the surface of the switch 35 that is pressed in the direction in which the switch 35 is pressed (the direction in which the center line extends). The upper end of the guide 36 is positioned higher than the surface of the switch 35. In other words, the pressing surface of the switch 35 is formed at a position lower (farther back) than the upper end of the guide 36. This reduces the possibility that the operator will accidentally touch the switch 35. As a result, the risk of the switch 35 being erroneously operated, causing the engine 11 to start or stop, is reduced.

<Modification>
The shovel 100 may include a key switch. The key switch is a device that can be used to start the shovel 100. The key switch has a key cylinder into which a mechanical key is inserted. The key switch is configured such that one of four rotation positions is selected by rotating the mechanical key inserted into the key cylinder. The four rotation positions are an OFF position, an ACC position, an ON position, and a START position. When the mechanical key is rotated to the OFF position, power supply to the controller 30 is cut off. When the mechanical key is rotated to the ACC position or the ON position, power is supplied to the controller 30. When the mechanical key is rotated to the START position, power is supplied to the starter 11b of the engine 11. The key switch may be a button-type device used in a smart entry system or the like.

If a key switch is provided, the ON/OFF switching of the basic system shown in FIG. 2 is performed based on the ON/OFF state of the key switch. Even if a key switch is provided, the operator can start/stop the engine 11 by operating switch 35.

The above describes the preferred embodiments of the present invention in detail. However, the present invention is not limited to the above-described embodiments. Various modifications, substitutions, etc. may be applied to the above-described embodiments without departing from the scope of the present invention. Furthermore, features described separately may be combined as long as no technical contradiction occurs.

For example, the excavator 100 may start up the basic system shown in FIG. 2 based on an operation on the image display unit 42, which is a touch panel, and start/stop the engine 11 based on an operation on the switch 35.

In the above embodiment, the switch 35 is disposed inside the dial 32, and thus the switch 35 and the dial (throttle) 32 are integrally provided. However, the arrangement of the dial 32 and the switch 35 is not limited to this. For example, the work machine may be configured to include a switch (button) that can rotate around the rotation axis C1.

In the above embodiment, the surface of the switch 35 arranged inside the guide 36 is arranged at a lower position than the upper end of the guide 36, but the arrangement of the switch 35 is not limited to this. The surface of the switch 35 may be arranged at approximately the same position as the upper end of the guide 36. In addition, the surface of the switch 35 may be arranged at a lower position than the upper end surface of the dial 32, or at approximately the same position as the upper end of the dial 32.

In the above embodiment, the switch 35 is disposed inside the guide 36, but the switch 35 is not limited to being disposed inside the guide 36. The work machine does not need to be equipped with the guide 36. For example, the switch 35 may be disposed inside the dial 32.

In the above embodiment, an example is given of starting and stopping the drive source by operating switch 35, but the drive source may also be stopped by operating a switch other than switch 35, for example.

In the above embodiment, the dial 32 and the switch 35 are disposed on the right console 54R, but the location where the dial 32 and the switch 35 are disposed is not limited to this. The dial 32 and the switch 35 may be provided on the window console 56, or may be disposed in another location.

In the above embodiment, a case where multiple switches 41 are arranged around the dial 32 and the switch 35 is illustrated, but the switches arranged around the dial 32 and the switch 35 are not limited to this. For example, other switches may not be arranged around the dial 32 and the switch 35. For example, a switch for switching the work mode of the work machine may be arranged around the dial 32 and the switch 35. Also, a switch for switching the operation mode of the work machine may be arranged around the dial 32 and the switch 35. The work machine may be configured to have a normal operation mode and a fuel-efficient operation mode in which energy consumption is set lower than that of the normal operation mode. The operator may switch the operation mode by operating a switch provided around the dial 32 and the switch 35. Also, the work machine may be configured to be able to perform operations other than starting and stopping the drive source by operating, for example, the switch 35.

In the above embodiment, a shovel 100 having a bucket 6 is exemplified as a work machine, but the work machine is not limited to the shovel 100. The work machine may be a work machine having an end attachment other than the bucket 6, such as a lifting magnet, a grapple, or a demolition fork.

100...Shovel (working machine)
1: Lower running body 3: Upper rotating body 10: Cabin 11: Engine (drive source)
32...Dial (throttle, rotary operation part)
35...Switch (button)
36...Guide (cylinder)
40: Display device 50: Driver's seat 57: Radio (electrical equipment)
C1: Rotation axis (center line)

Claims (10)

A lower running body;
An upper rotating body rotatably mounted on the lower traveling body;
A drive source mounted on the upper rotating body;
a cabin mounted on the upper rotating body and having a driver's seat;
A work machine, wherein a switch for starting the drive source and a throttle for changing an output of the drive source are integrally provided inside the cabin. The work machine according to claim 1, wherein the drive source is started when the switch is operated in a first operation while a pre-start condition is satisfied. The work machine according to claim 2, wherein the first operation is a long press operation that continues for a length of time equal to or longer than a reference time. The work machine according to claim 2, wherein when the switch is operated in the second operation, an accessory power source capable of supplying current to an electrical component is activated. the first operation is a long press operation that is continued for a length of time equal to or longer than a reference time,
The work machine according to claim 4 , wherein the second operation is a single push operation having a length shorter than the reference time. The work machine according to claim 1, wherein when the switch is operated in a third operation while the drive source is activated, the drive source is stopped. The work machine according to claim 1, further comprising a display device that displays the operation method of the switch. The switch has a button that is operated by pressing the button,
The work machine according to claim 1 , wherein the throttle has a rotary operating part that is rotatable about an axis. Further comprising a cylinder;
The button is disposed inside the cylinder and can be operated by pressing it in a direction along a center line of the cylinder,
The work machine according to claim 8 , wherein the rotation operation part is arranged so as to surround the cylindrical body and is rotatable along an outer circumferential surface of the cylindrical body. The work machine according to claim 9 , wherein the cylindrical body projects outward beyond a surface of the button that is pressed in a direction in which the button is pressed.

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