Belt tensioning device for underground mines, preferably for inlet - and / or through running coals crusher

摘要

In a belt tensioning device for underground operations, preferably for one-sided or throughflow coal breakers, in which the belt tensioning force is predetermined by means of the length of a telescopic member and readjusted by altering the telescopic length, it is provided according to the invention that the telescopic member consists of a rod provided on the outside with a bearing and of a turnbuckle, the turnbuckle sleeve of which guides, in its base, the rod, which is aligned with the turnbuckle spindle, which supports the other bearing, the turnbuckle sleeve being supported on springs in a spring tube which is fixed on the rod and carries a pointer, axially movable by way of the turnbuckle sleeve, for a notch made on the outside of the turnbuckle sleeve.