| 摘要 |
A tamping, levelling and lining machine has a bridge-like main frame 7 which carries the operators, propulsion system, power supply and control systems. All the lifting, lining, and tamping tools 17, 18 are mounted on a sub-frame 19 which can move longitudinally relative to the main frame under the operation of a drive 27 and is suspended from the main frame at two longitudinally separated positions 21, 24. In operation, the main frame moves continuously while the tool frame is operated by the longitudinal drive 27 so as to move intermittently for tamping successive sleepers. The described manner of mounting the tool frame on the main frame ensures that the entire weight of the machine is available to assist penetration of the tamping tools into the ballast, whereas the intermittently moving tool frame can be made relatively light and compact. <IMAGE> |
