| 摘要 |
A retracting finger auger assembly is provided with a limiter inside the auger tube of the assembly that is disposed to make temporary engagement with the internal eccentrically offset finger shaft of the retracting finger mechanism in the event of flexure of the finger shaft beyond a predetermined amount. In a preferred embodiment, the limiter comprises a transverse, annular member with a guide ring of anti-friction material circumscribing the finger shaft, the member being secured to the interior surface of the auger tube for rotation therewith. The anti-friction guide ring is normally maintained slightly out of contacting engagement with the finger shaft, but is disposed to be engaged as necessary by the flexing shaft to limit such flexing and prevent over-retraction of the retracting fingers.
|
