| 摘要 |
<p>The drain cleaning machine (10) comprises a frame (12) supporting a rotatable drum (56, 60) which is driven by a motor (110) through an endless belt (112). The drum (14) contains a flexible drain cleaning snake (24) which is rotatable with the drum (56, 60) and axially displaceable into and out of the drum (56, 60), and the frame (12) supports a snake feeding device (18) through which the snake (24) extends and by which the snake (24) is displaced into and out of the drum (56, 60). The snake feeding device (18) includes three rollers (only two 162, 166 shown in Fig. 7) which engage the snake (24) to feed the latter inwardly and outwardly of the drum in response to rotation of the drum, and two of the rollers (such as roller 166 in Fig. 7), are radially adjustable relative to the snake (24) through corresponding cam arrangements (176) so that the feeding device (18) can accommodate snakes (24) having different diameters. <IMAGE> <IMAGE></p> |
