Rotational speed controller
AssigneeTok Bearing Co., Ltd.
InventorKenji Takahashi
Life of this patent
Estimating the term…
Abstract
The provision of a rotational speed controller which is capable of increasing braking torque without a corresponding increase in size, and easily outputting braking torque assumed in the design, and minimizing variations in the braking torque. A casing 6 incorporates a shaft 7 inserted therein, a first rotor 8 rotated together with the shaft 7 in one piece, and a second rotor 10 rotated through the medium of the first rotor 8 and a planet gear 9. A first rotation mechanism for rotating the first rotor 8 is the shaft 7. A second rotation mechanism for rotating the second rotor 10 is a planetary gear mechanism operated in association with the rotation of the first rotor 8.
Claims6
A rotational speed controller, comprising:
- a casing filled with a viscous fluid;
- a shaft rotating relatively to said casing;
- a first rotor incorporated in said casing;
- a second rotor rotating relatively to said first rotor with a gap between itself and the first rotor;
- a cap for hermetically sealing said casing;
- a first rotation mechanism for rotating said first rotor;
- and
- a second rotation mechanism for rotating said second rotor, shearing resistance being generated between said first rotor and said second rotor.
Dependencies are inferred from the claim text.