Display system for excavating machine, excavating machine, and display method for excavating machine

1. A display system being used for an excavating machine that includes an upper swing body including a work implement having a bucket, the upper swing body configured to swing about a predetermined swing central axis, the display system comprising:

a vehicle state detecting unit that detects information about a current position and posture of the excavating machine;

a storage unit that stores at least position information of a target plane indicating a target shape of a work object; and

a processing unit that is configured to

obtain two pieces of target swing information indicating an amount of swing of the upper swing body including the work implement, the amount of swing being required for a tooth edge of the bucket to face the target plane, based on information including a direction of the tooth edge of the bucket calculated based on information including current position and posture of the excavating machine, information including a direction orthogonal to the target plane, information including a direction of the swing central axis, and positional relation between the excavating machine and the target plane,

determine whether the two pieces of information are included in a direction angle range determined by the positional relation between the excavating machine and the target plane,

select one piece of the target swing information based on a condition corresponding to the determination of whether the two pieces of information are included in the direction angle range; and

display an image corresponding to the selected one piece of target swing information on a display apparatus.

2. The display system for an excavating machine according to claim 1 , wherein when the target swing information is not determined or when the target swing information is not obtained, the processing unit makes a display mode of the image corresponding to the target swing information displayed on the display apparatus different from that for when the target swing information is determined or when the target swing information is obtained.

3. The display system for an excavating machine according to claim 1 , wherein the processing unit makes a display mode of the image displayed on a screen of the display apparatus different before and after the tooth edge of the bucket faces the target plane.

4. The display system for an excavating machine according to claim 1 , wherein

the bucket rotates about a first axis and rotates about a second axis orthogonal to the first axis, by which the tooth edge is tilted with respect to a third axis orthogonal to the first axis and the second axis,

the display system further comprises a bucket tilt detecting unit that detects a tilt angle of the bucket, and

the processing unit determines the direction of the tooth edge of the bucket, based on the tilt angle of the bucket detected by the bucket tilt detecting unit and the information about the current position and posture of the excavating machine.

5. An excavating machine comprising:

an upper swing body that swings about a predetermined swing central axis, a work implement having a bucket being mounted on the upper swing body;

a traveling apparatus provided underneath the upper swing body; and

a display system for an excavating machine, according to claim 1 .

6. A display system being used for an excavating machine that includes an upper swing body including a work implement having a bucket, the upper swing body configured to swing about a predetermined swing central axis, the display system comprising:

a vehicle state detecting unit that detects information about a current position and posture of the excavating machine;

a storage unit that stores at least position information of a target plane indicating a target shape of a work object; and

a processing unit that is configured to

obtain two pieces of target swing information indicating an amount of swing of the upper swing body including the work implement, the amount of swing being required for a tooth edge of the bucket to become parallel to the target plane, based on information including a direction of the tooth edge of the bucket calculated based on information including current position and posture of the excavating machine, information including a direction orthogonal to the target plane, information including a direction of the swing central axis, and positional relation between the excavating machine and the target plane,

select one piece of the target swing information based on a condition whether the two pieces of information are included in a direction angle range determined by the positional relation between the excavating machine and the target plane, and

display an image corresponding to the selected one piece of target swing information on a display apparatus, wherein

the processing unit makes a mode of the image corresponding to the target swing information displayed on a screen of the display apparatus different before and after the tooth edge of the bucket faces the target plane.

7. An excavating machine comprising:

an upper swing body that swings about a predetermined swing central axis, a work implement having a bucket being mounted on the upper swing body;

a traveling apparatus provided underneath the upper swing body; and

a display system for an excavating machine, according to claim 6 .

8. A display method being used for an excavating machine display system, the excavating vehicle including an upper swing body including a work implement having a bucket, the upper swing body configured to swing about a predetermined swing central axis, the display method comprising:

a processing unit obtaining two pieces of target swing information indicating an amount of swing of the upper swing body including the work implement, the amount of swing being required for a tooth edge of the bucket to face a target plane, based on information including a direction of the tooth edge of the bucket calculated based on information including current position and posture of the excavating machine, information including a direction orthogonal to the target plane, information including a direction of the swing central axis, and positional relation between the excavating machine and the target plane;

the processing unit selecting one piece of the target swing information based on a condition whether the two pieces of information are included in a direction angle range determined by the positional relation between the excavating machine and the target plane; and

displaying an image corresponding to the selected one piece of target swing information on a display apparatus.

9. The display method for an excavating machine according to claim 8 , wherein when the target swing information is not determined or when the target swing information is not obtained, a display mode of the image corresponding to the target swing information displayed on the display apparatus is made different from that for when the target swing information is determined or when the target swing information is obtained.

10. A display system for an excavating machine, the excavating machine including an upper swing body including a work implement having a bucket, the upper swing body configured to swing about a predetermined swing central axis, the display system comprising:

a vehicle state detecting unit that detects information about a current position and posture of the excavating machine;

a storage unit that stores at least position information of a target plane indicating a target shape of a work object; and

a processing unit that is configured to

obtain a target rotation angle of the upper swing body including the work implement, the target rotation angle being required for a tooth edge of the bucket to face the target plane, based on information regarding the tooth edge of the bucket calculated based on information including current position and posture of the excavating machine, information regarding the target plane, and information regarding the swing central axis, and

display an image in which a pointer is separated, by the target rotation angle, from a mark corresponding to a facing position on a display apparatus.