| 摘要 |
A mining apparatus for the mechanized breaking-down of mineral raw materials, particularly coal, in underground mining operation includes at least one endless chain and chain wheels for the endless chain. A main drived is provided for one of the chain wheels and an auxiliary drive is provided for the other chain wheel. The main drive and the auxiliary drive each has a transmission unit including main transmission stage, initial transmission stage, coupling and drive motor. A superposed motor in the form of a controllable electric motor having small power acts in connection with a worm gear transmission on the superposed input of the superposed transmission unit. Synchronous running of the main drive and the auxiliary drive or the drive motors thereof is achieved by a unilateral drive control. This results in a uniform power and load input independently of the wear of the chain and chain wheels. |
