| 摘要 |
<p>An arrangement for controlled engagement of the tools of a mining machine, especially a coal planer, with a mine face comprises an abutment, for instance a scraper conveyor, provided on its front face directed toward the mine face with a guide rail guiding the mining machine for reciprocation in substantially horizontal direction along the mine face and a mechanism for tilting the abutment and the mining machine guided thereon about a substantially horizontal axis. The tilting mechanism is connected to the rear face of the abutment and extends in its entirety rearwardly of the rear face of the latter. The tilting mechanism comprises a guide linkage pivotally connected at its front end to the rear face of the scraper conveyor while its rear end portion forms a housing for a fluid operated cylinder and piston unit, the piston rod of which is connected to a connecting rod guided by the guide linkage for movement in longitudinal direction and having an upwardly extending front section pivotally connected at its upper free end to the above mentioned rear face of the scraper conveyor. The tilting unit, that is the fluid operated cylinder-and-piston unit is thus considerably spaced from the scraper conveyor and the material transported thereby and especially coal dust raised during transport of the mined coal by the conveyor, whereby maintenance of the tilting unit is reduced. In addition, the guide linkage, the connecting rod and the tilting unit are all in close proximity to the sole of the mine gallery to leave a considerable free space between the arrangement and the roof of the mine gallery.</p> |
