| 摘要 |
A tunneling machine having a main support frame and also a movable frame which is longitudinally movable in stepwise fashion as the tunnel is being drilled, in which a main bearing assembly is utilized for transmitting both forward thrust and rotating drive to a cutting wheel, the main bearing assembly having a stator (housing) to which forward thrust is imparted by separate forward thrust drive means, the stator being attached to the forward end of the movable frame for pulling it forward, the main bearing assembly also including a rotor which directly drives the cutting wheel and which receives rotational drive through a mated pair of driving gears from the drive shaft of the machine; the rotor being supported from the stator by both radial and thrust bearings, and the pair of driving gears being longitudinally slidable so that vibration stresses from the cutting head are not transmitted back through the drive shaft to the rotating drive mechanism of the machine. |
