Shield tunneling machine

Details Shield tunneling machine Shield tunneling machine

E - Fixed Constructions

21

D

E21D 9/08 (2006.01) E21B 7/20 (2006.01)

Patent

CA 2098138

ABSTRACT OF THE DISCLOSURE A shield tunneling machine comprises a shield body. The shield body is divided into a soil chamber and an inside chamber by a partition wall. The soil chamber has 8 conical peripheral surface converging gradually rearward. A crankshaft having an eccentric portion is rotatably supported by the partition wall at the center of the partition wall corresponding to the axis of the shield body. A cutter disc with roller bits is secured to a front end of the crankshaft, and a conical rotor is rotatably mounted on the eccentric portion of the crankshaft behind the cutter disc . A rear end of the crankshaft is connected with a drive. Since the cutter disc is rotated at an increased rotary velocity by five to ten times as many as that of a cutter disc in a conventional shield tunneling machine, crushing of gravels can be efficiently carried out by the cutter disc with roller bits in coorporation with the conical rotor mounted on the krankshaft.

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