Bucket operating structure for shovel working vehicle

Abstract

Abstract PURPOSE:To enable slow stop and quick stop to be effected individually and separately from each other, by providing a control means which changes over a control device, adapted to decrease a working speed in the vicinity of the stroke end of a cylinder for bucket slewing, to an operative condition and a non-operative condition. CONSTITUTION:A bucket 2 is pivotally secured to the forward end of an arm 1 so that it can be freely rocked around an axis P, and the bucket 2 is rocked through a link 3 with the aid of a cylinder 4. A sensor 7, which detects an expansion or contraction amount of the cylinder 4 from a rocking angle of the bucket 2 with the arm 1, is mounted to the axis P. When the cylinder 4 is expanded to the vicinity of a stroke end on the soil discharge side, a control device is actuated on an electromagnetic proportional valve 8 to decrease the working speed of the cylinder 4 to bring the bucket 2 into a slow stop. Meanwhile, a control means 9 is changed over to bring the control means 8 into a non-operative state. As a result, the cylinder 4 is forced into a quick stop at the stroke end, and earth in the bucket is dropped due to an impact produced by said quick stop.

Inventors

• 👤 Masami Kubota
• 👤 久保田　昌実
• 👤 Akira Tsuda
• 👤 彰 津田
• 👤 Masahiro Tsutsumi
• 👤 堤　正博

Bibliographic Details