| 摘要 |
A cutting wheel assembly has a rotatable element (15) having a plurality of rollers (19) which are arranged to run around the outer surface of a support plate (27). A cut-out portion (33) is formed in the support plate, in which portion a drive pinion (34) is located, to mesh with the rollers (19) on the radially inner side thereof. Drive is imparted to the element (15) through the rollers (19), which also serve to mount the element (15) in a rotatable manner. Replaceable cutters are mounted around the outer periphery of the element (15). |
