| 摘要 |
Longwall truck device composed of two trucks with two pairs of mutually parallel pulleys, a trough and guides with bows with a pulling coin chain, characterised in that between the leading pulleys (6,7) of the truck, it has a chain wheel (8) with teeth adapted to the chain pitch (5) and a brake drum (11) connected in a non-separable manner with the chain wheel (8) belted with a tape (12), with leads in form of a lever, and the wheel axis (8) is mounted in a longitudinal groove (9) and pressed down to the basic position by a spring (10).<IMAGE>
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