| 摘要 |
<p>1,272,356. Tunnelling machines. MOSKOVSKY MEKHANICHESKY ZAVOD GLAVTONNELMETROST-ROYA. 11 Aug., 1970 No. 38613/70. Heading E1F. In a tunnelling machine in which a rockcutting member 4 is rotatably supported by roll means 11 on a frame mounted within a shield 1 and is restrained against movement relative to the frame 1 along the axis of rotation of the member by a lock nut-carrying stub shaft 8 passing through an opening 6 in the frame, the opening is of a size that the clearance between it and the shaft permits of movement of the member in a vertical direction transverse of the axis of rotation thereof on operation of one or more pistoncylinder actuators 20 installed between a roll and the frame to ensure of correct meshing of the driven element 15 of the member 4 with the driven members 14 of frame-mounted motors 13.</p> |
