Excavator for use in a tunneling shield

Details Excavator for use in a tunneling shield Excavator for use in a tunneling shield

1978-08-17

1980-02-26

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

With mine roof-supporting means

299 67, E21D 908

Patent

active

041902947

ABSTRACT:
An earth digging tool is mounted on the head of a tripod, the legs of which are double-acting hydraulic cylinders. The rear ends of the cylinders are connected to a rotor which is supported in a tunneling shield for rotation about an axis extending longitudinally of the tunnel. The cylinders are selectively extended and retracted for the purpose of moving the cutting tool forwardly and rearwardly and also up and down and sideways. The entire excavator is rotated for changing the sideways attitude of the digging tool. Universal joints are provided at both ends of each hydraulic cylinder, for substantially isolating them from bending moments and torque. A telescopic torque tube assembly is interconnected between the cutting tool mounting head and a gimbal carried by the rotor. The torque tube carries the bending moments and torque loads and transmits them back to the rotor.

REFERENCES:
patent: 3215391 (1965-11-01), Storm
patent: 3288421 (1966-11-01), Peterson
patent: 3404920 (1968-10-01), Tabor
patent: 3556599 (1971-01-01), Fikse
patent: 3578809 (1971-05-01), Cunningham
patent: 3612609 (1971-07-01), Reuls
patent: 3966256 (1975-04-01), Fikse
patent: 4043137 (1977-08-01), Jutte et al.
patent: 4070772 (1978-01-01), Motomura et al.

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