Underground excavator

E - Fixed Constructions – 21 – D

Patent

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Details

E21D 9/10 (2006.01) E02F 3/28 (2006.01) E02F 5/00 (2006.01) E21D 9/06 (2006.01) E21D 9/08 (2006.01)

Patent

CA 2234028

An underground excavator is formed by providing a crank to a rotary driver of cutter section, coupling a plurality of hydraulic jacks to the crank as mutually spaced in circumferential direction, and rotatively driving the rotary driver by means of these hydraulic jacks through the crank. Cutter drive section is thereby simplified remarkably in the structure, and the cutter section can be rotatively driven without requiring any parts high in the working precision or any lubricating oil.

Cette invention concerne une excavatrice souterraine à trépan rotatif à mécanisme d'entraînement par vilebrequin auquel sont couplées une série de vérins hydrauliques espacés circonférentiellement et servant à faire tourner le trépan par l'intermédiaire du vilebrequin. De cette façon, le mécanisme d'entraînement est remarquablement simplifié et permet de faire tourner le trépan sans faire appel à des pièces de haute précision ni lubrification à l'huile.

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