Title:
LIFT ARM DRIVING MECHANISM FOR AGRICULTURAL TRACTOR
Document Type and Number:
Japanese Patent JPH01181711
Kind Code:
A
Abstract:
PURPOSE:To prevent the ground-working tool from plunging into the soil steeply by forcing the operation shaft of the position control valve for the lift arm to rotate in the rising direction with the mechanical downward displacement of the lift arm. CONSTITUTION:The lift arm 8 and the valve-operating shaft 21 is connected through a mechanical connector A, and the valve shaft 21 is operated so that the arm 8 is lifted, as the arm 8 comes down lower than the prescribed position (a little before the plowing tool plunges into the ground) to narrow the discharge of hydraulic fluid from the lift cylinder to slow down the falling speed of the plowing tool.
Inventors:
ISHIDA MIKIO
SHIIYAMA HIDEO
SHIIYAMA HIDEO
Application Number:
JP722588A
Publication Date:
July 19, 1989
Filing Date:
January 16, 1988
Export Citation:
Assignee:
KUBOTA LTD
International Classes:
A01B63/111; A01B63/00; (IPC1-7): A01B63/111
Attorney, Agent or Firm:
Kitamura Osamu