| 摘要 |
The invention relates to rack and pinion arrangement for advancing e.g. a shearer loader comprising a toothed driving sprocket, with rack and pinion rods (1) having a plurality of lantern teeth (2), a respective end tooth (20) being arranged at both ends (6, 6A) of each rod (1), the end tooth profile of the end tooth differing from the tooth profile of the inner teeth (2) arranged between the end teeth (20). The invention relates also to the rack and pinion rods. In order to improve interaction between the teeth of the sprocket and the rods, the end teeth (20) are formed symmetrically to a vertical end tooth centre plane (M') and the tooth head (23) of the end teeth (20) is positioned lower than the tooth heads (13) of the inner rack and pinion teeth (2). |
