| 摘要 |
<p>A bucket-angle controlling method which is capable of automatically turning off the bucket-angle-maintaining control to maintain the bucket of a hydraulic shovel (12) at a specified position. When the open surface of the bucket (15bk) comes close to the horizontal plane, bucket angle (υ bk), which is an angle of the bucket (15bk) open surface with respect to the horizontal plane, is maintained constant in order to prevent load from being spilled at the time of unloading and so forth. When bucket angle (υ bk) is greater than a preset standard value (υ bkset), a controller judges that bucket (15bk) is performing excavation. Then, the bucket-angle-maintaining control is temporarily deactivated to permit excavation to be performed through manual control.</p> |
