| 摘要 |
PROBLEM TO BE SOLVED: To secure excellent transmission efficiency in a structure small, light and inexpensive to manufacture with a small number of parts. SOLUTION: Outer peripheral surfaces of trunnions 7a, 7a are made spherical convex surfaces 20, 20, and rollers 18, 18 are supported in the circumference free to rotate through a radial needle bearing 10. Rubbing of a part of these rollers 18, 18 and a part of a housing 2a on the non-contact side is prevented by inclining guide surfaces 16a, 16a to make outer peripheral surfaces of the rollers 18, 18 with.
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