초록 ▼

A transmission apparatus having an annular casing formed integrally, in its inner face, with a plurality of wave-shaped inner teeth, a plurality of drive roll elements rolling along the toothed inner face of the annular casing, a carrier for swingably supporting the drive roll elements by means of a

A transmission apparatus having an annular casing formed integrally, in its inner face, with a plurality of wave-shaped inner teeth, a plurality of drive roll elements rolling along the toothed inner face of the annular casing, a carrier for swingably supporting the drive roll elements by means of associated connecting element, and a wave generator for cyclically urging the drive roll elements to radially displace while rolling along the toothed inner face, thereby urging the carrier element to exert thereon a drive force.

대표청구항 ▼

A transmission apparatus for changing the rotational speed between a first and a second shaft at a predetermined changing ratio, comprising: an annular casing having an inner surface; wave generator means having a cylindrical outer surface fixed to and rotatable with the first shaft; at least three

A transmission apparatus for changing the rotational speed between a first and a second shaft at a predetermined changing ratio, comprising: an annular casing having an inner surface; wave generator means having a cylindrical outer surface fixed to and rotatable with the first shaft; at least three drive rollers; carrier means, including first means rotatably mounting each of the drive rollers, connected to and rotatable with the second shaft for rotation within the casing, said first means including second means swingably supporting each of the rotatable drive rollers for permitting constant contact of the drive rollers with the outer surface of the wave generator means and the inner surface of the casing; the inner surface of the annular casing having teeth with a radial configuration selected to position each of the rollers at the intersection of first and second wave-shaped curves, said curves defining an envelope formed by the teeth on the inner surface of the casing and the outer surface of the wave generator means during rolling movement of the drive rollers on the outer surface of the wave generator means at times when the carrier means and the wave generator means are rotating relative to one another at the predetermined changing ratio, the selected radial configuration being effective to provide constant physical contact of the drive rollers with the outer surface of the wave generator means and the teeth on the inner surface of the casing; the first curve corresponding to a line passing through the rotational centers of the drive rollers at times when the rollers roll along the teeth on the surface of the casing; the second curve corresponding to a line passing through the rotational centers of the drive rollers at times when the rollers roll along the outer surface of the wave generator means; and the second curve having a wave length corresponding to an internal multiple of the wave length of the first curve with both first and second curves having the same amplitude.