JP2017186875A - Control system of work vehicle, control method, and work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control system of a work vehicle, a control method, and a work vehicle, capable of easily operating a function of automatic control.SOLUTION: A control system of a work vehicle includes a first operation lever of a work unit, a first operation member, and a controller. The first operation member is provided at the first operation lever. The controller performs automatic control on the work unit. The controller, when an execution condition which includes that the first operation lever is at a neutral position is met, executes a function of automatic control that is assigned to the first operation member according to operation of the first operation member.SELECTED DRAWING: Figure 15

Description

  The present invention relates to a work vehicle control system, a control method, and a work vehicle.

  2. Description of the Related Art Conventionally, some work vehicle control systems perform automatic control of work machines. For example, in the hydraulic excavator of Patent Document 1, the work implement is controlled so that the bucket of the work implement does not exceed a preset design landform.

  The work vehicle control system is provided with an operation member for operating an automatic control function. For example, the above-described hydraulic excavator is provided with an operation member for changing the position of the designed terrain, and the operation member is provided in a console box disposed behind the operation lever of the work implement.

Japanese Patent No. 3869792

  When the automatic control operation member is provided in the console box like the above-described hydraulic excavator, the operator of the work vehicle needs to release the hand from the operation lever of the work implement and operate the operation member. This increases the number of operations for operating the operation member, which is complicated.

  An object of the present invention is to provide a work vehicle control system, a control method, and a work vehicle that can easily operate an automatic control function.

  A work vehicle control system according to a first aspect includes a first operation lever of a work machine, a first operation member, and a controller. The first operation member is provided on the first operation lever. The controller performs automatic control of the work machine. The controller executes an automatic control function assigned to the first operation member in accordance with the operation of the first operation member when an execution condition including that the first operation lever is in the neutral position is satisfied.

  In the work vehicle control system according to this aspect, the first operation member is provided on the first operation lever. Therefore, the operator can operate the first operation member while holding the first operation lever. Thereby, the function of automatic control can be operated easily.

  Further, when the first operation member is provided on the first operation lever, there is a concern that the first operation lever may be moved due to an erroneous operation during operation of the first operation member. In this case, the execution of the automatic control function assigned to the first operation member and the operation of the work implement by the first operation lever are performed at the same time, which may cause the operation of the work implement not intended by the operator. . When such an unintended operation occurs, it becomes difficult to perform a high-quality construction by automatic control.

  Therefore, in the work vehicle control system according to this aspect, when the execution condition including that the first operation lever is in the neutral position is satisfied, the work vehicle is assigned to the first operation member according to the operation of the first operation member. The specified automatic control function is executed. Therefore, even if the first operating lever moves during operation of the first operating member, the execution of the automatic control function assigned to the first operating member and the operation of the work machine by the first operating lever are performed simultaneously. This can be prevented. Thereby, it is possible to prevent unintended operation of the work machine due to an erroneous operation, and it is possible to perform high-quality construction by automatic control.

  In the automatic control, the controller may control the work machine based on the design terrain representing the target shape of the work target. In this case, it is possible to perform high-quality construction according to the design terrain by automatic control.

  The controller may change the position of the designed terrain according to the operation of the first operation member when the execution condition is satisfied. In this case, the operator can easily change the position of the designed terrain by operating the first operation member while holding the first operation lever. Further, when the position of the design terrain is to be changed by the first operation member, even if the first operation lever is moved from the neutral position by an erroneous operation, the change of the position of the design terrain is not executed. Alternatively, even if the first operating member is accidentally operated during the operation of the first operating lever, the design terrain position is not changed. Therefore, it can suppress that a working machine digs the ground beyond design terrain.

  The first operating member may be an operating member for executing the first function of automatic control. The work vehicle control system may further include a second operation member for executing the second function of the automatic control. The second function may be different from the first function. In this case, the operator can operate the execution of a plurality of automatic control functions by the first and second operation members.

  The controller may enable or disable the automatic control according to the operation of the second operation member when the execution condition is satisfied. In this case, the operator can enable or disable the automatic control by operating the second operation member while holding the first operation lever.

  Both the first operating member and the second operating member may be provided on the first operating lever. The controller may execute the first function according to the operation of the first operation member when the execution condition is satisfied. The controller may execute the second function according to the operation of the second operation member when the execution condition is satisfied.

  In this case, the operator can easily operate the first operation member and the second operation member while holding the first operation lever. Further, when the first operating lever is operated, the first function is not executed even if the first operating member is operated, and the second function is not executed even if the second operating member is operated. Therefore, it is possible to prevent an unintended operation of the work machine due to an erroneous operation, and it is possible to perform high-quality construction by automatic control.

  The control system for the work vehicle may further include a second operation lever. The first operation member may be provided on the first operation lever, and the second operation member may be provided on the second operation lever. In this case, the operator can easily operate the first operation member while holding the first operation lever. Further, the operator can easily operate the second operation member while holding the second operation lever.

  The controller may execute the first function in response to the operation of the first operation member when a first execution condition including that the first operation lever is in the neutral position is satisfied. The controller may execute the second function in response to the operation of the second operation member when a second execution condition including that the second operation lever is in the neutral position is satisfied.

  In this case, when the first operation lever is operated, the first function is not executed even if the first operation member is operated. Further, when the second operation lever is operated, the second function is not executed even if the second operation member is operated. Therefore, it is possible to prevent an unintended operation of the work machine due to an erroneous operation, and it is possible to perform high-quality construction by automatic control.

  The execution condition may include that the first operation lever is in the neutral position and that the second operation lever is in the neutral position. The controller may execute the first function according to the operation of the first operation member when the execution condition is satisfied. The controller may execute the second function according to the operation of the second operation member when the execution condition is satisfied.

  In this case, when at least one of the first operation lever and the second operation lever is operated, the first function is not executed even if the first operation member is operated. Further, when at least one of the first operation lever and the second operation lever is operated, the second function is not executed even if the second operation member is operated. Therefore, it is possible to prevent an unintended operation of the work machine due to an erroneous operation, and it is possible to perform high-quality construction by automatic control.

  The work vehicle control system may further include a third operation member provided on the first operation lever. The execution condition may further include that the third operation member is operated. In this case, the function of automatic control assigned to the first operating member by operating the first operating member while the first operating lever is in the neutral position and the third operating member is operated. Is executed. Therefore, unintended operation of the work machine due to an erroneous operation can be prevented with higher accuracy.

  The controller may execute the first function of automatic control according to the operation of the first operating member when the first execution condition is satisfied. The first execution condition may include that the first operation lever is in a neutral position and that the third operation member is not operated. The controller may execute a third function different from the first function in accordance with the operation of the first operation member when the third execution condition is satisfied. The third execution condition includes that the first operation lever is in the neutral position and that the third operation member is operated.

  In this case, the first function and the second function can be executed by the first operation member depending on whether or not the third operation member is operated. Thereby, many functions can be operated with few operation members.

  The work vehicle control method according to the second aspect includes the following steps. In the first step, a position signal indicating the position of the first operating lever of the work implement is received. In the second step, an operation signal indicating the operation of the first operation member provided on the first operation lever is received. In the third step, it is determined whether or not an execution condition including that the operator does not operate the first operating lever is satisfied. In the fourth step, when the above execution condition is satisfied, the automatic control function of the work machine assigned to the first operation member is executed according to the operation of the first operation member.

  In the work vehicle control method according to this aspect, the automatic control function of the work implement is assigned to the first operation member provided on the first operation lever. Therefore, the operator can operate the first operation member while holding the first operation lever. Thereby, the function of automatic control can be operated easily.

  Further, even if the first operation lever moves during operation of the first operation member, the automatic control function assigned to the first operation member is not executed. Therefore, it is possible to prevent the execution of the automatic control function and the operation of the work machine by the first operation lever from being performed simultaneously. Thereby, it is possible to prevent unintended operation of the work machine due to an erroneous operation, and it is possible to perform high-quality construction by automatic control.

  A work vehicle according to a third aspect includes a work machine, a first operation lever of the work machine, a first operation member, and a controller. The first operation member is provided on the first operation lever. The controller performs automatic control of the work machine. The controller executes an automatic control function assigned to the first operation member in accordance with the operation of the first operation member when an execution condition including that the first operation lever is in the neutral position is satisfied.

  In the work vehicle according to this aspect, the first operation member is provided on the first operation lever. Therefore, the operator can operate the first operation member while holding the first operation lever. Thereby, the function of automatic control can be operated easily.

  Further, even if the first operation lever moves during operation of the first operation member, the automatic control function assigned to the first operation member is not executed. Therefore, it is possible to prevent the execution of the automatic control function and the operation of the work machine by the first operation lever from being performed simultaneously. Thereby, it is possible to prevent unintended operation of the work machine due to an erroneous operation, and it is possible to perform high-quality construction by automatic control.

  According to the present invention, an automatic control function can be easily operated, an unintended operation of the work machine due to an erroneous operation can be prevented, and high-quality construction can be performed by automatic control.

1 is a perspective view of a work vehicle according to an embodiment. It is a block diagram which shows the structure of the control system of a work vehicle. It is a side view showing the composition of a work vehicle typically. It is a schematic diagram which shows an example of design topography. It is a block diagram which shows the structure of a controller. It is a schematic diagram which shows the distance between a working machine and a design surface. It is a figure which shows the speed control of the working machine in leveling control. It is a figure which shows an example of a guidance screen. It is a figure which shows a 1st operation lever. It is a figure which shows a 2nd operation lever. It is a figure which shows an example of the guidance screen at the time of operation of an operation member. It is a figure which shows an example of the guidance screen at the time of operation of an operation member. It is a figure which shows an example of the guidance screen at the time of operation of an operation member. It is a figure which shows an example of the guidance screen at the time of operation of an operation member. It is a flowchart which shows the process at the time of operation of an operation member. It is a figure which shows operation | movement of the working machine at the time of angle maintenance control. It is a figure which shows an example of the guidance screen at the time of operation of an operation member. It is a figure which shows an example of the guidance screen at the time of operation of an operation member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a work vehicle 100 according to the embodiment. In the present embodiment, the work vehicle 100 is a hydraulic excavator. The work vehicle 100 includes a vehicle main body 1 and a work implement 2.

  The vehicle body 1 includes a turning body 3 and a traveling device 5. The swivel body 3 houses an engine, a hydraulic pump, and the like which will be described later. A cab 4 is placed on the revolving structure 3. The traveling device 5 has crawler belts 5a and 5b, and the work vehicle 100 travels as the crawler belts 5a and 5b rotate.

  The work machine 2 is attached to the vehicle body 1. The work machine 2 includes a boom 6, an arm 7, and a bucket 8. The base end portion of the boom 6 is operably attached to the front portion of the vehicle main body 1. The base end of the arm 7 is operably attached to the tip of the boom 6. A bucket 8 is operably attached to the tip of the arm 7.

  The bucket 8 is an example of a work tool. A work tool other than the bucket 8 may be attached to the tip of the arm 7.

  The work machine 2 includes a boom cylinder 10, an arm cylinder 11, and a bucket cylinder 12. The boom cylinder 10, the arm cylinder 11, and the bucket cylinder 12 are hydraulic cylinders that are driven by hydraulic oil, respectively. The boom cylinder 10 drives the boom 6. The arm cylinder 11 drives the arm 7. The bucket cylinder 12 drives the bucket 8.

  FIG. 2 is a block diagram showing the configuration of drive system 200 and control system 300 of work vehicle 100. As shown in FIG. 2, the drive system 200 includes an engine 21 and hydraulic pumps 22 and 23.

  The hydraulic pumps 22 and 23 are driven by the engine 21 to discharge hydraulic oil. The hydraulic oil discharged from the hydraulic pumps 22 and 23 is supplied to the boom cylinder 10, the arm cylinder 11, and the bucket cylinder 12. In addition, the work vehicle 100 includes a turning motor 24. The turning motor 24 is a hydraulic motor, and is driven by hydraulic oil discharged from the hydraulic pumps 22 and 23. The turning motor 24 turns the turning body 3.

  In FIG. 2, two hydraulic pumps 22 and 23 are shown, but only one hydraulic pump may be provided. The turning motor 24 is not limited to a hydraulic motor, and may be an electric motor.

  The control system 300 includes an operating device 25, a controller 26, and a control valve 27. The operating device 25 is a device for operating the work machine 2. The operation device 25 receives an operation by an operator for driving the work machine 2 and outputs a position signal corresponding to the operation amount. The operation device 25 includes a first operation lever 28 and a second operation lever 29.

  The first operation lever 28 is provided so as to be operable in four directions, front, rear, left and right. Two of the four operating directions of the first operating lever 28 are assigned to the raising operation and lowering operation of the boom 6. The remaining two operation directions of the first operation lever 28 are assigned to the raising operation and the lowering operation of the bucket 8.

  The second operation lever 29 is provided so as to be operable in four directions, front, rear, left and right. Two of the four operating directions of the second operating lever 29 are assigned to the raising operation (arm dumping operation) and the lowering operation (arm excavation operation) of the arm 7. The remaining two operation directions of the second operation lever 29 are assigned to the right turn operation and the left turn operation of the revolving structure 3.

  The operation content assigned to the first operation lever 28 and the second operation lever 29 is not limited to the above, and may be changed.

  The operation device 25 includes a boom operation unit 31 and a bucket operation unit 32. The boom operation unit 31 outputs a position signal corresponding to an operation amount of the first operation lever 28 for operating the boom 6 (hereinafter referred to as “boom operation amount”). The bucket operation unit 32 outputs a position signal corresponding to the operation amount of the first operation lever 28 for operating the bucket 8 (hereinafter referred to as “bucket operation amount”).

  The operation device 25 includes an arm operation unit 33 and a turning operation unit 34. The arm operation unit 33 outputs a position signal corresponding to the operation amount of the second operation lever 29 for operating the arm 7 (hereinafter referred to as “arm operation amount”). The turning operation unit 34 outputs a position signal corresponding to the operation amount of the second operation lever 29 for operating the turning of the turning body 3. Position signals from the operation units 31-34 are input to the controller 26.

  The controller 26 is programmed to control the work vehicle 100 based on the acquired information. The controller 26 includes a storage unit 38 and a calculation unit 35. The storage unit 38 includes a memory such as a RAM and a ROM and an auxiliary storage device. The computing unit 35 is configured by a processing device such as a CPU, for example. The controller 26 acquires position signals from the boom operation unit 31, the arm operation unit 33, the bucket operation unit 32, and the turning operation unit 34. The controller 26 controls the control valve 27 based on these position signals.

  The control valve 27 is an electromagnetic proportional control valve and is controlled by a command signal from the controller 26. The control valve 27 is disposed between hydraulic actuators such as the boom cylinder 10, the arm cylinder 11, the bucket cylinder 12, and the turning motor 24, and the hydraulic pumps 22 and 23. The control valve 27 controls the flow rate of hydraulic oil supplied from the hydraulic pumps 22 and 23 to the boom cylinder 10, the arm cylinder 11, the bucket cylinder 12, and the swing motor 24.

  The controller 26 controls a command signal to the control valve 27 so that the work implement 2 operates at a speed corresponding to the operation amount of each operation lever 28 and 29 described above. Thereby, the outputs of the boom cylinder 10, the arm cylinder 11, the bucket cylinder 12, the turning motor 24, and the like are controlled according to the operation amounts of the operation levers 28 and 29.

  The control valve 27 may be a pressure proportional control valve. In that case, the pilot pressure corresponding to the operation amount of each operation member is output from the boom operation unit 31, the bucket operation unit 32, the arm operation unit 33, and the turning operation unit 34, and is input to the control valve 27. The control valve 27 controls the flow rate of hydraulic oil supplied to the boom cylinder 10, the arm cylinder 11, the bucket cylinder 12, and the swing motor 24 according to the input pilot pressure. In this case, the position signal from each operation unit 31-34 may be a signal indicating the pilot pressure output from each operation unit 31-34.

  The control system 300 includes a first stroke sensor 16, a second stroke sensor 17, and a third stroke sensor 18. The first stroke sensor 16 detects the stroke length of the boom cylinder 10 (hereinafter referred to as “boom cylinder length”). The second stroke sensor 17 detects the stroke length of the arm cylinder 11 (hereinafter referred to as “arm cylinder length”). The third stroke sensor 18 detects the stroke length of the bucket cylinder 12 (hereinafter referred to as “bucket cylinder length”). An angle sensor or the like may be used for measuring the stroke.

  The control system 300 includes an inclination angle sensor 19. The inclination angle sensor 19 is disposed on the revolving structure 3. The tilt angle sensor 19 detects an angle (pitch angle) of the revolving structure 3 with respect to the horizontal in the vehicle longitudinal direction and an angle with respect to the horizontal in the vehicle lateral direction (roll angle).

  These sensors 16-19 send detection signals to the controller 26. The turning angle may be acquired from position information of the GNSS antenna 37 described later. The controller 26 determines the posture of the work implement 2 based on the detection signal from the sensor 16-19.

  The control system 300 includes a position detection unit 36. The position detection unit 36 detects the current position of the work vehicle 100. The position detection unit 36 includes a GNSS antenna 37 and a three-dimensional position sensor 39. The GNSS antenna 37 is provided on the revolving unit 3. The GNSS antenna 37 is an antenna for RTK-GNSS (Real Time Kinematic-Global Navigation Satellite Systems, GNSS is a global navigation satellite system). A signal corresponding to the GNSS radio wave received by the GNSS antenna 37 is input to the three-dimensional position sensor 39.

  FIG. 3 is a side view schematically showing the configuration of the work vehicle 100. The three-dimensional position sensor 39 detects the installation position P1 of the GNSS antenna 37 in the global coordinate system. The global coordinate system is a three-dimensional coordinate system based on the reference position P2 installed in the work area. As shown in FIG. 3, the reference position P2 is located at the tip of the reference pile set in the work area, for example. The controller 26 calculates the position of the cutting edge P4 of the work implement 2 when viewed in the global coordinate system based on the detection result by the position detection unit 36 and the posture of the work implement 2. The cutting edge P4 of the work machine 2 may be expressed as the cutting edge P4 of the bucket 8.

  The controller 26 calculates the tilt angle θ1 of the boom 6 with respect to the vertical direction of the local coordinate system from the boom cylinder length detected by the first stroke sensor 16. The controller 26 calculates the inclination angle θ2 of the arm 7 with respect to the boom 6 from the arm cylinder length detected by the second stroke sensor 17. The controller 26 calculates the inclination angle θ3 of the bucket 8 with respect to the arm 7 from the bucket cylinder length detected by the third stroke sensor 18.

  The storage unit 38 of the controller 26 stores work implement data. The work machine data includes the length L1 of the boom 6, the length L2 of the arm 7, and the length L3 of the bucket 8. Further, the work implement data includes position information of the boom pin 13 with respect to the reference position P3 of the local coordinate system. Here, the local coordinate system is a three-dimensional coordinate system based on the work vehicle 100. The reference position P3 of the local coordinate system is located at the turning center of the turning body 3, for example.

  The controller 26 includes an inclination angle θ1 of the boom 6, an inclination angle θ2 of the arm 7, an inclination angle θ3 of the bucket 8, a length L1 of the boom 6, a length L2 of the arm 7, a length L3 of the bucket 8, and the boom pin 13. From the position information, the position of the cutting edge P4 in the local coordinate system is calculated.

  Further, the work machine data includes position information of the installation position P1 of the GNSS antenna 37 with respect to the reference position P3 of the local coordinate system. The controller 26 converts the position of the cutting edge P4 in the local coordinate system into the position of the cutting edge P4 in the global coordinate system from the detection result by the position detection unit 36 and the position information of the GNSS antenna 37. Thereby, the controller 26 acquires the position information of the blade edge P4 when viewed in the global coordinate system.

  The storage unit 38 of the controller 26 stores construction information indicating the shape and position of the three-dimensional design landform in the work area. FIG. 4 is a schematic diagram illustrating an example of the design terrain. As shown in FIG. 4, the design landform is composed of a plurality of design surfaces 41 each represented by a polygon. Each of the plurality of design surfaces 41 indicates a target shape to be excavated by the work machine 2. In FIG. 4, only one of the plurality of design surfaces 41 is denoted by reference numeral 41, and the other design surfaces 41 are omitted.

  The controller 26 performs automatic control of the work machine 2 in consideration of the design surface 41. The automatic control includes control of the work machine 2 for preventing the bucket 8 from eroding the design surface 41. The controller 26 controls the work machine 2 based on the construction information and the position information of the work machine 2 described above in automatic control. The automatic control of the work machine 2 means the operation control of the work machine 2 independently performed by the controller 26 separately from the operation control of the work machine 2 based on the operation instruction of the operator via the operation device 25. The automatic control of the work machine 2 includes fully automatic control and semi-automatic control for executing a certain work. Hereinafter, the automatic control of the work machine 2 executed by the controller 26 will be described in detail.

  FIG. 5 is a block diagram showing the configuration of the controller 26. The calculation unit 35 of the controller 26 includes a distance acquisition unit 51, a work situation determination unit 52, an automatic control unit 53, and a work implement control unit 54. The distance acquisition unit 51 acquires a distance d1 between the work implement 2 and the design surface 41 as illustrated in FIG. Specifically, the distance acquisition unit 51 determines the distance d1 between the cutting edge P4 of the working machine 2 and the design surface 41 based on the position information of the cutting edge P4 of the working machine 2 and the position information of the design surface 41 described above. Is calculated.

  The work situation determination unit 52 determines a work situation by the work machine 2. Based on the position signals from the above-described boom operation unit 31, arm operation unit 33, and bucket operation unit 32, the work situation determination unit 52 determines whether the work situation by the work implement 2 is work such as excavation or leveling. judge. For example, the work situation determination unit 52 determines that the work situation is excavation work when the boom operation or the bucket operation is performed but the arm operation is not performed. The work situation determination unit 52 determines that the work situation is leveling work when the arm operation is performed.

  When the work phase is excavation work, the automatic control unit 53 performs speed limit control. In the speed limit control, the automatic control unit 53 limits the speed of the work machine 2 as the distance d1 between the work machine 2 and the design surface 41 becomes smaller. That is, in the speed limit control, the automatic control unit 53 decreases the upper limit of the speed of the work implement 2 as the distance d1 between the work implement 2 and the design surface 41 becomes smaller. Thereby, it can suppress that the working machine 2 excavates exceeding the design surface 41 at the time of excavation.

  When the work phase is leveling work, the automatic control unit 53 executes leveling control. The leveling control is a control for controlling the work machine 2 so that the work machine 2 moves along the design surface 41. As shown in FIG. 7, when the cutting edge P4 of the work machine 2 is moving at a speed V1 so as to approach the design surface 41, the automatic control unit 53 calculates a speed component V1a perpendicular to the design surface 41 of the speed V1. To do. The automatic control unit 53 determines the speed at which the boom 6 is raised so as to cancel out the vertical speed component V1a. Accordingly, the work implement 2 is controlled by the leveling control so that the cutting edge P4 moves along the design surface 41.

  The work machine control unit 54 controls the work machine 2 by outputting a command signal to the control valve 27 described above. The work machine control unit 54 determines the output value of the command signal to the control valve 27 according to the operation amount of the work machine 2. Further, the work machine control unit 54 determines the output value of the command signal to the control valve 27 based on the speed of the work machine 2 determined by the automatic control unit 53 during execution of the automatic control.

  As shown in FIG. 2, the control system 300 includes a display unit 40. The display unit 40 is a monitor, for example, and displays information regarding the work vehicle 100. The controller 26 causes the display unit 40 to display a guidance screen based on the design terrain and detection results from the various sensors described above. FIG. 8 is a diagram illustrating an example of the guidance screen 61. As shown in FIG. 8, the guidance screen 61 shows the positional relationship between the design surface 41 and the work implement 2.

  Specifically, the guidance screen 61 includes a first guidance screen 62 and a second guidance screen 63. The first guide screen 62 shows the design surface 41 and the work machine 2 in a side view. The second guide screen 63 shows the design surface 41 and the work implement 2 in a perspective view. The guidance screen 61 includes a distance display 65 that indicates the distance between the work implement 2 and the design surface 41. One of the first guide screen 62 and the second guide screen 63 may be omitted.

  As shown in FIG. 2, the control system 300 includes an input unit 42. The input unit 42 is a device for inputting the automatic control settings described above. The operator can change the automatic control setting by operating the input unit 42. In the present embodiment, the input unit 42 is a touch panel device provided integrally with the display unit 40. However, the input unit 42 may be provided separately from the display unit 40.

  Next, the automatic control operation by the first operation lever 28 and the second operation lever 29 will be described in detail. FIG. 9A is a front view of the first operation lever 28. FIG. 9B is a side view of the first operation lever 28. As shown in FIGS. 9A and 9B, the first operating lever 28 is provided with a plurality of operating members A1, A2, A3, A4, and A5. The operation members A1, A2, A3, A4 are provided on the front surface of the first operation lever 28. The operation members A1, A2, A3, and A4 are provided on the upper portion of the first operation lever 28. The operation member A5 is provided on the back surface of the first operation lever 28.

  The operation members A1, A2 and A3 are push button type switches. An operation signal indicating ON / OFF of pressing of the operation members A1, A2, and A3 is input to the controller 26 from the operation members A1, A2, and A3. The operation member A4 is a slide type or rotary type switch. An operation signal corresponding to the operation position of the operation member A4 is input to the controller 26 from the operation member A4. The operation member A5 is a trigger type switch. An operation signal indicating ON / OFF of pressing of the operation member A5 is input to the controller 26 from the operation member A5.

  FIG. 10A is a front view of the second operation lever 29. FIG. 10B is a side view of the second operation lever 29. As shown in FIGS. 10A and 10B, the second operation lever 29 is provided with a plurality of operation members B1, B2, B3, B4, and B5. The operation members B1, B2, B3, and B4 are provided on the front surface of the second operation lever 29. The operation members B1, B2, B3, and B4 are provided on the upper portion of the second operation lever 29. The operation member B5 is provided on the back surface of the second operation lever 29.

  The operation members B1, B2, and B3 are push button type switches. An operation signal indicating ON / OFF of pressing of the operation members B1, B2, and B3 is input to the controller 26 from the operation members B1, B2, and B3. The operation member B4 is a slide type or rotary type switch. An operation signal corresponding to the operation position of the operation member B4 is input from the operation member B4 to the controller 26. The operation member B5 is a trigger type switch. An operation signal indicating ON / OFF of pressing of the operation member B5 is input from the operation member B5 to the controller 26.

  An automatic control function is assigned to a part of these operation members A1-A5 and B1-B5. In the present embodiment, automatic control functions are assigned to the operation members A2, B2, and A5.

  Note that operations related to the work implement 2 and operations related to the vehicle main body 1 are assigned to the operation members other than the operation members A2, B2, and A5. The operation related to the work implement 2 is, for example, an operation of the work implement when a work implement such as a breaker is provided in the work implement 2 instead of the bucket 8. The operation relating to the vehicle body 1 is, for example, an operation for increasing the engine output or an operation for sounding a horn.

  Specifically, a function for raising the position of the design surface 41 is assigned to the operation member A2. By operating the operation member A2, the position of the design surface 41 is changed upward. For each operation of the operation member A2, the position of the design surface 41 is changed upward by a predetermined distance.

  FIG. 11 shows a state in which the design surface 41 is moved a predetermined distance upward from the initial position (see FIG. 8) on the guide screen 61 by pressing the operation member A2 once. FIG. 12 shows a state in which the design surface 41 is moved further upward by a predetermined distance on the guide screen 61 when the operation member A2 is pushed once more.

  A function for lowering the position of the design surface 41 is assigned to the operation member B2. By operating the operation member B2, the position of the design surface 41 is changed downward. Each time the operation member B2 is operated, the position of the design surface 41 is changed downward by a predetermined distance. FIG. 13 shows a state in which the design surface 41 has moved downward from the initial position (see FIG. 8) by a predetermined distance on the guide screen 61 by pressing the operation member B2 once. FIG. 14 shows a state in which the design surface 41 is moved further downward by a predetermined distance on the guide screen 61 when the operation member B2 is pushed once more.

  As described above, when the operation members A2 and B2 are operated, the position of the design surface 41 on the guidance screen 61 is changed up and down. Then, the above-described automatic control is executed based on the changed position of the design surface 41. The predetermined distance described above may be changeable by operating the input unit 42. Alternatively, the predetermined distance described above may be a fixed value.

  A function for enabling / disabling automatic control is assigned to the operation member A5. Each time the operating member A5 is operated, the automatic control is alternately switched between valid and invalid. Enabling automatic control means that automatic control is permitted. Disabling automatic control means that automatic control is not permitted, and the operation mode of the work machine 2 becomes a manual mode in which the work machine 2 is operated manually.

  As described above, the operator can execute the automatic control function assigned to each of the operation members A2, B2, and A5 by operating the operation members A2, B2, and A5. However, the controller 26 executes the automatic control function assigned to the operation members A2, B2, and A5 on condition that the execution condition is satisfied.

  The execution condition is that there is no operation of the operation lever by the operator for operating the work machine 2. In the present embodiment, the execution condition is that the first operation lever 28 is in the neutral position and the second operation lever 29 is in the neutral position. Therefore, when the first operation lever 28 and the second operation lever 29 are both in the neutral position, the position of the design surface 41 is moved upward by operating the operation member A2. When the first operation lever 28 and the second operation lever 29 are in the neutral position, the position of the design surface 41 is moved downward by operating the operation member B2. When at least one of the first operation lever 28 and the second operation lever 29 is operated to a position different from the neutral position, the position of the design surface 41 is not changed even if the operation members A2 and B2 are operated.

  Further, when the first operation lever 28 and the second operation lever 29 are in the neutral position, the operation member A5 is operated to switch the automatic control to be enabled / disabled. When at least one of the first operation lever 28 and the second operation lever 29 is operated to a position different from the neutral position, even if the operation member A5 is operated, automatic control is not enabled / disabled.

  FIG. 15 is a flowchart showing processing at the time of operation of the operation members A2, B2, and A5 described above. Here, as an example, a case where the operation member A2 is operated will be described.

  As shown in FIG. 15, in step S1, the operation of the operation member A2 is detected. Here, the controller 26 detects the operation of the operation member A2 by receiving the operation signal from the operation member A2.

  In step S2, the positions of the operation levers 28 and 29 are detected. Here, the controller 26 detects the position of the first operation lever 28 by receiving a position signal indicating the position of the first operation lever 28 from the operation device 25. Further, the controller 26 receives a position signal indicating the position of the second operation lever 29 from the operation device 25, thereby detecting the position of the second operation lever 29.

  In step S3, it is determined whether or not the execution condition is satisfied. Here, the controller 26 determines whether or not the first operation lever 28 is in the neutral position and the second operation lever 29 is in the neutral position. When both the first operation lever 28 and the second operation lever 29 are in the neutral position, the controller 26 determines that the execution condition is satisfied. When at least one of the first operation lever 28 and the second operation lever 29 is at a position different from the neutral position, the controller 26 determines that the execution condition is not satisfied.

  When the execution condition is satisfied, the function of the operation member A2 is executed in step S4. Here, the controller 26 changes the position of the design surface 41 upward. When the execution condition is not satisfied, even if the operation member A2 is operated, the function of the operation member A2 is not executed. That is, when the execution condition is not satisfied, the position of the design surface 41 is not changed even if the operation member A2 is operated.

  If the operation member B2 is operated, the position of the design surface 41 is changed downward in step S4. When the operation member A5 is operated, the automatic control is switched between valid and invalid in step S4. The functions assigned to the operation members A2, B2, and A5 can also be operated by the input unit 42.

  In the control system 300 of the work vehicle 100 according to the present embodiment described above, the operation members A2 and A5 are provided on the first operation lever 28. Therefore, the operator can operate the operation members A2 and A5 while holding the first operation lever 28. Thereby, the automatic control function assigned to the operation members A2 and A5 can be easily operated. Similarly, the operation member B <b> 2 is provided on the second operation lever 29. Therefore, the operator can operate the operation member B2 while holding the second operation lever 29. Thereby, it is possible to easily operate the automatic control function assigned to the operation member B2.

  Specifically, the operator can change the position of the design surface 41 up and down by operating the operation members A2 and B2 while holding the first operation lever 28 and the second operation lever 29. The operator can switch between enabling and disabling automatic control by operating the operation member A5 while holding the first operation lever 28.

  Further, when at least one of the first operation lever 28 and the second operation lever 29 is at a position different from the neutral position, even if the operation members A2, B2, A5 are operated, the operation members A2, B2, A5 are assigned. The specified automatic control function is not executed. Therefore, even if the first operation lever 28 or the second operation lever 29 moves during operation of the operation members A2, B2, A5, execution of the automatic control function assigned to each operation member A2, B2, A5; It is possible to prevent the operation of the work machine 2 by the first operation lever 28 or the second operation lever 29 from being performed simultaneously. Thereby, the operation | movement of the unintentional working machine 2 by erroneous operation can be prevented, and the construction with sufficient quality by automatic control can be performed.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

  The work vehicle 100 is not limited to a hydraulic excavator, and may be a vehicle having a work machine such as a bulldozer or a wheel loader.

  Work vehicle 100 may be remotely operable. That is, the controller 26 may be divided into a remote controller disposed outside the work vehicle 100 and an in-vehicle controller disposed inside the work vehicle 100, and may be configured to be able to communicate with each other.

  The determination method of the position of the blade edge | tip P4 of the working machine 2 is not restricted to the thing of said embodiment, You may change. For example, the position detection unit 36 may be disposed on the cutting edge P4 of the work machine 2.

  The detection method of the distance d1 between the work machine 2 and the design surface 41 is not limited to the above-described embodiment, and may be changed. For example, the distance d1 between the work machine 2 and the design surface 41 may be detected by an optical, ultrasonic, or laser beam type distance measuring device.

  The execution conditions of the automatic control function according to the operation of each operation member A2, B2, A5 may be different from each other. For example, the execution condition (first execution condition) when the operation members A2 and A5 of the first operation lever 28 are operated includes that the first operation lever 28 is in the neutral position, and the second operation lever 29 is It does not have to include being in the neutral position. The execution condition (second execution condition) when the operation member B2 of the second operation lever 29 is operated includes that the second operation lever 29 is in the neutral position, and the first operation lever 28 is in the neutral position. It does not have to be included.

  In the above embodiment, the operation member A2 (first operation member) for changing the position of the design surface 41 upward and the operation member B2 (second operation member) for changing the position of the design surface 41 downward. Are provided on separate operation levers 28 and 29, respectively. However, the operation member A2 and the operation member B2 may be provided on a common operation lever. Alternatively, a function of changing the position of the design surface 41 up and down may be assigned to an operation member that can be operated up and down, such as the operation member A4 or the operation member B4.

  The structures of the first operation lever 28 and the second operation lever 29 may be changed. The number, arrangement, or shape of the operation members provided on the first operation lever 28 and the operation members provided on the second operation lever 29 may be changed. The operation member to which the automatic control function is assigned is not limited to the operation members A2, B2, and A5, but may be other operation members.

  The function of the automatic control assigned to the operation member is not limited to the change of the position of the design surface 41 and the switching of the automatic control validation / invalidation, but may be other functions. Of the functions included in the automatic control, those frequently used are preferably assigned to the operation member. For example, as shown in FIG. 16, the automatic control may include angle holding control in which the angle An of the bucket 8 with respect to the design surface 41 is held constant in leveling control. Switching between validation / invalidation of the angle holding control may be assigned to the operation member.

  A function of selecting a specific design surface among the plurality of design surfaces 41 may be assigned to the operation member. For example, as shown in FIG. 17, the function of selecting the design surface 41a located directly below the cutting edge P4 may be assigned to the operation member. The above-described automatic control may be executed based on the selected design surface 41a. Alternatively, the selected design surface 41a may be shown in a different mode (for example, different color) from the other design surfaces 41. Alternatively, the guidance screen 61 may indicate whether or not the work vehicle 100 is directly facing the selected design surface 41a. In FIG. 17, whether or not the work vehicle 100 is directly facing the selected design surface 41 a is indicated by a compass icon 64 on the guidance screen 61.

  The function of changing the display scale on the guidance screen 61 may be assigned to the operation member. For example, a function of switching between a general display guide screen 61 as shown in FIG. 17 and a detailed display guide screen 61 ′ as shown in FIG. 18 may be assigned to the operation member. In the detailed display shown in FIG. 18, the design surfaces 41 and 41a may be displayed larger than the schematic display shown in FIG. In the schematic display shown in FIG. 17, the entire work vehicle 100 may be displayed on the guidance screen 61. On the other hand, in the detailed display shown in FIG. 18, only the bucket 8 may be displayed on the guidance screen 61 ′ on a larger scale than the schematic display.

  The execution condition of the automatic control function according to the operation of the operation member may further include that an operation member other than the operation member is operated. For example, the automatic control function may be executed by operating the operation member A2 while the first operation lever 28 is neutral and the operation member A4 is operated. Alternatively, the automatic control function may be executed by operating the operation member B2 while the second operation lever 29 is neutral and the operation member B4 is operated.

  Alternatively, a predetermined function (first function) of automatic control is executed by operating the operation member A2 in a state where the first operation lever 28 is neutral and the operation member A4 is not operated. Also good. In addition, when the second operation lever 29 is neutral and the operation member A2 is operated while the operation member A4 is operated, a predetermined function (third function) of automatic control different from the first function is operated. May be executed.

  For example, the first function may be a function of changing the position of the design surface 41 described above upward or downward. The third function may be a function for selecting the design surface 41. Alternatively, the third function may be a function for changing the display scale of the guidance screen 61. The first function and the third function may be functions different from the functions described above.

  Conditions included in the execution conditions described above may be changed. Alternatively, a condition different from the above-described condition may be added to the condition included in the execution condition. The execution condition is not limited to the operation lever being in the neutral position, and may include other conditions indicating that the operation lever is not operated by the operator.

  According to the present invention, an automatic control function can be easily operated, an unintended operation of the work machine due to an erroneous operation can be prevented, and high-quality construction can be performed by automatic control.

2 Work implement 28 1st operation lever 29 2nd operation lever A2 1st operation member B2 2nd operation member A4 3rd operation member 26 Controller 100 Work vehicle 300 Control system

Claims (13)

A control system for a work vehicle having a work machine,
A first operating lever of the working machine;
A first operating member provided on the first operating lever;
A controller that performs automatic control of the working machine;
With
The controller controls the automatic control assigned to the first operation member in accordance with an operation of the first operation member when an execution condition including that the first operation lever is in a neutral position is satisfied. Perform the functions of
Work vehicle control system. In the automatic control, the controller controls the working machine based on a design terrain representing a target shape of a work target.
The work vehicle control system according to claim 1. The controller changes the position of the design terrain according to the operation of the first operation member when the execution condition is satisfied,
The work vehicle control system according to claim 2. The first operation member is an operation member for executing the first function of the automatic control,
A second operating member for executing a second function different from the first function of the automatic control;
The work vehicle control system according to claim 1. The controller enables or disables the automatic control according to an operation of the second operation member when the execution condition is satisfied;
The work vehicle control system according to claim 4. The first operating member and the second operating member are both provided on the first operating lever,
The controller executes the first function according to an operation of the first operation member when the execution condition is satisfied, and the second operation member when the execution condition is satisfied. The second function is executed in response to the operation of
The work vehicle control system according to claim 4. A second operating lever provided with the second operating member;
The work vehicle control system according to claim 4. The controller executes the first function in response to an operation of the first operation member when a first execution condition including that the first operation lever is in a neutral position is satisfied, Executing the second function in response to an operation of the second operation member when a second execution condition including that the two operation levers are in a neutral position is satisfied,
The work vehicle control system according to claim 7. The execution condition includes that the first operation lever is in a neutral position, and that the second operation lever is in a neutral position,
The controller executes the first function according to an operation of the first operation member when the execution condition is satisfied, and operates the second operation member when the execution condition is satisfied. Performing the second function in response,
The work vehicle control system according to claim 7. A third operation member provided on the first operation lever;
The execution condition further includes that the third operation member is operated,
The work vehicle control system according to claim 1. The controller is configured such that when a first execution condition including that the first operating lever is in a neutral position and the third operating member is not operated is satisfied, The first function of the automatic control is executed according to an operation, and a third execution condition including that the first operation lever is in a neutral position and that the third operation member is operated is satisfied. A third function different from the first function is executed according to an operation of the first operating member.
The work vehicle control system according to claim 10. A method for controlling a work vehicle having a work machine,
Receiving a position signal indicating the position of the first operating lever of the working machine;
Receiving an operation signal indicating an operation of a first operation member provided on the first operation lever;
Determining whether an execution condition including no operation of the first operating lever by an operator is satisfied;
Executing the automatic control function of the work implement assigned to the first operation member in accordance with the operation of the first operation member when the execution condition is satisfied;
A method for controlling a work vehicle. A working machine,
A first operating lever of the working machine;
A first operating member provided on the first operating lever;
A controller that performs automatic control of the working machine;
With
The controller is configured to perform the automatic control assigned to the first operation member in response to an operation of the first operation member when an execution condition including that the first operation lever is in a neutral position is satisfied. Perform function,
Work vehicle.

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