IMPLEMENT LIFTING APPARATUS FOR FARM TRACTOR

摘要

PROBLEM TO BE SOLVED: To prevent the damage of a relating mechanism by absorbing excessive feedback energy when flipping up a rear cover of a rotary implement. SOLUTION: The implement lifting apparatus is capable of controlling the height of an implement to a preset level by connecting a means to detect the posture of the implement and feed back the change in the posture to a hydraulic valve for lifting or lowering the implement liftably connected to a machine body. An interlocking disengaging mechanism is provided to allow the follow of the posture detection means within a prescribed range and break the following mode when the motion is out of the prescribed range during the feed back. The interlocking disengaging mechanism is composed of locking pieces, etc., to maintain the engaging pin to engage the plate of the side of the detection means with the bracket of the passive side in a state locked to the bracket and keep the engaging pin in a state engaging the plate with the bracket when the operation of the detecting means is within a prescribed range. The locked state is disengaged to release the engagement when the motion is out of the prescribed range.