| 摘要 |
PROBLEM TO BE SOLVED: To provide a rocking gear device having high transmission efficiency, by making both compatible in securing a degree of freedom of processing accuracy and securing a degree of freedom of positioning accuracy, without impairing an original characteristic such as small type high output. SOLUTION: In this rocking gear device having four bevel gears, first and fourth gears are constituted as a projecting tooth being an equal height tooth out of a cross-sectional semicircular recessed groove extending in the radial direction from the gear center at an equal interval on a pitch cone and a columnar roller rollingly arranged in the recessed groove. Second and third gears respectively meshing with the first and fourth gears are a recessed tooth formed as a generated tooth shape or an approximately generated tooth shape of generating and transferring a tooth shape of the projecting tooth. The projecting tooth is formed longer in the tooth trace length than the tooth trace length of a recessed tooth, and the recessed groove of constituting the projecting tooth is formed in the same circular arc cross section of a uniform cross section so as to non-tiltably support a roller in close contact in the whole tooth trace direction area. The roller is respectively positioned and held by an annular retainer on both ends in the tooth trace direction. COPYRIGHT: (C)2008,JPO&INPIT
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