| 摘要 |
The toothed belt (4) runs around upper and lower toothed wheels (31,23) between pairs of protectors (30,30'; 20,20'). Its straight portions pass through two elastic tubes (5) held together in an elongated sheath (6). The lower protectors (20,20') incorporate belt guides (21,21') around central passages (22,22') into which the toothed wheel (23) is fitted with a coupling ring (230) for rotation by a drive (2). One of the upper protectors (30) has an annular projection (302) around its passage (301) for engagement in a groove (310) of the toothed wheel (31). |
