| 摘要 |
PURPOSE:To dispense with a complicated press-contact mechanism between rollers, reduce a size, prevent abrasion, and obtain a certain transmitting for a long time with the movement of the roller even when it is abraded. CONSTITUTION:An output shaft 3 is supported to a fixed bearing body 1 having an iron ring 2. An input shaft 4 provided with a disc 5 is supported opposedly to the output shaft 3. An iron ring 6 is provided on the disc 5, and a steel ball 7 is arranged between the iron rings 2 and 6. A carrier 4 having discs 8, 9 is fixed to the shaft 3. Cutouts 12 are formed on the outer edge of the discs 8, 9, while a roller shaft 13 is supported thereby. A planetary magnetic frictional roller 14 is fixed to one end of the shaft 13, while a planetary magnetic frictional roller 15 is fixed to the other end thereof. The roller 14 is in contact with an inner periphery of the iron ring 2 in a rotatable manner, while the roller 15 is in contact with an inner periphery of the iron ring 6 in a revoluting manner. When contact surfaces of the rollers 14, 15 and the rings 2, 6 are abraded, the shaft 13 is moved in a diameter direction by magnetic attraction force so as to keep a proper contact condition therebetween. |
