| 摘要 |
<p>The rotating drilling machine for coal is driven by compressed air and consists of a housing fitted on with hand grips opposite sides. Between the machine housing (2) and the machine body (1) is mounted an overload prevention device in the form of a slipping clutch (6, 7). The slipping clutch (6, 7) is adjustable for a predetermined torque, and when activated, the machine body rotates to overlap the air inlet in the machine housing (2) and interrupt the flow of compressed air. The hand grips on the opposite sides of the housing (2) form an inlet (3) and an outlet (4) for the compressed air.</p> |
