Gearless differential speed reducer device
OwnerKenji Imaseinventor
Life of this patent
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Abstract
In a gearless differential speed reducer, first and second discs are provided in a manner to oppose each other, and a plurality of semi-spherical recesses circumferentially are provided on the opposing surface of the first disc along a certain pitch circle. A groove provided on the opposing surface of the second disc, the groove defined as a cycloidal-based curve running along a pitch circle. A rollable ball is provided to be placed at each of the semi-spherical recess and the groove. The balls are adapted to roll within the recess, and at the same time, roll along the groove when a rotational movement is transmitted to the second disc to impart the second disc with a nutational movement. A rectifier member provided to pick up a rotational movement from the nutational movement of the second disc.
Claims12
A gearless differential speed reducer device comprising:
- first and second discs located to oppose each other through their opposing surfaces;
- a plurality of semi-spherical recesses circumferentially provided on the opposing surface of one of the first and second discs along a certain pitch circle;
- a groove provided on the opposing surface of the other of the first and second disc, the groove defined as a cycloidal-based curve running along a pitch circle, a radius of which is the same as that of the semi-spherical recesses;
- a rollable ball, one semi-spherical portion of which is generally placed at the recess while other semi-spherical portion of the ball placed at the groove, the ball rolling within the recess, and at the same time, rolling along the groove when a rotational movement is transmitted to the second disc to impart the second disc with a nutational movement;
- and
- a rectifier member provided to pick up a rotational movement from the nutational movement of the second disc.
Dependencies are inferred from the claim text.