Pit excavator

Abstract

Abstract PURPOSE:To raise the efficiency of excavation by connecting the first and second bit shaft groups in which vertical bit shafts are pivotally attached to left and right-handed arms of a sidewardly turned support arm in such a way as to mutually turn them to the opposite directions by a driver. CONSTITUTION:The bearing part 2 of the arm 1a of a support arm consisting of two arm parts 1a and 1b is connected with the other arm 1b detachably by a connector 4. The bearing part 2 is also pivotally attached with a vertical drill pipe 6 having a bit 5 on its lower end and a bit shaft 7 to form the first bit shaft group A, which is turned to the same direction as the drill pipe 6. The bearing part 3 of the other arm 1b is pivotally attached with a bit shaft 12 having a bit 11 on its lower end to form the second bit shaft group B, which transmits the rotation in the opposite direction of the group A. The efficiency of excavation can thus be raised by such a simple constitution.

Inventors

• 👤 Shohei Senda
• 👤 昌平 千田
• 👤 Naoki Yamamoto
• 👤 山本　直機

Bibliographic Details