| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a friction-type speed increasing/reducing device capable of generating a force for pressing a planetary roller to a sun roller and a ring roller by a simple constitution. <P>SOLUTION: In this friction-type speed increasing/reducing device 6, a planetary roller 42 is arranged between a sun roller 41 and a ring roller 43, and an outer circumference of the planetary roller 42 is formed into a tapered shape whose outside diameter is gradually reduced. Planetary roller mechanisms 40 contacting with the outer circumference of the planetary roller 42 are provided on an outer circumference 41a of the sun roller 41 and an inner circumference 43a of the ring roller 43. This device is provided with a sun gear 31 which is a helical gear, and connected integrally rotatably with a carrier 44 holding the planetary roller 42 rotatably around an axis of the sun roller 41. The sun gear 31 is provided so as to apply an axial F load generated during rotating in a predetermined direction to a direction to press the planetary roller 42 to the sun roller 41 and the ring roller 43. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
