| 摘要 |
<p>An extendable rotor arm (23) for a mining machine. The rotor arm rotates about an axis parallel to the direction of machine motion, and has an extendable portion (35) which extends perpendicular to the axis of rotation to vary the width of mining. The extendable portion is mounted on a shaft (31) and is fastened with keys (49) to prevent rotation and a sleeve (33) to reduce wear to the shaft.</p> |
