| 摘要 |
Adjustable diameter pulley, particularly suitable for the belt tension adjustment in belt transmission system such as those used in serial printers, comprises a central core (100), constituted by a tapered portion (100 A) and by a threaded cylindrical portion (100 B), and a plastic ring (101) having external cylindrical surface and a central tapered opening. The opening receives the conical portion (100A) of the cor (100) and is provided with deep slits (101 A, 101 B, 101 C, 101 P .......) which allow its expansion.
<??>A second ring (104), screwed on the cylindrical portion (100 B) of the core (100), inserts more or less deeply the core (100) into the plastic ring (101) which is subjected to a larger or smaller expansion. |
