Sun and planet gear mechanism
AssigneeFuji Photo Optical Co., Ltd.
InventorKenji Yamane
Life of this patent
Estimating the term…
Abstract
In a center of a sun gear an inner cylindrical portion is provided. The inner cylindrical portion is rotatably fitted to a fixed shaft. On the sun gear a circular groove is formed around the inner cylindrical portion. At a center of a planet lever an outer cylindrical portion is formed. The outer cylindrical portion fits to the inner cylindrical portion in the groove. On the inner cylindrical portion plural arms are formed, and an end of each arm contacts to a wall of the groove with an adequate pressure. When the sun gear rotates, a frictional force is generated by contact of between the wall and the arm and has an effect on the planet lever to swing with the sun gear. The planet gear attached to the planet lever revolts about the sun gear.
Claims15
A sun and planet gear mechanism comprising:
- a fixed shaft;
- a sun gear rotatably fitted on said fixed shaft;
- at least one planet gear meshed with said sun gear, a rotation of said sun gear being transmitted to said at least one planet gears;
- and
- a planet lever for rotatably supporting said planet gears, swingably attached to said sun gear, a frictional force between said planet lever and said sun gear causing said planet lever to swing with rotation of said sun gear such that said at least one planet gear may revolute about said sun gear;
- wherein said sun gear has a first cylindrical portion in which said fixed shaft is fitted and a circular groove formed around said first cylindrical portion;
- and
- said planet lever has a second cylindrical portion which rotatably fits on a periphery of said first cylindrical portion in said circular groove.
A sun and planet gear mechanism comprising:
- a fixed shaft;
- a sun gear rotatably fitted on and in direct contact with said fixed shaft;
- at least one planet gear meshed with said sun gear, a rotation of said sun gear being transmitted to said at least one planet gears;
- and
- a planet lever for rotatably supporting said planet gears, swingably attached to said sun gear, a frictional force between said planet lever and said sun gear causing said planet lever to swing with rotation of said sun gear such that said at least one planet gear may revolute about said sun gear
- wherein said sun gear has a first cylindrical portion in which said fixed shaft is fitted and a circular groove formed around said first cylindrical portion;
- and
- said planet lever has a second cylindrical portion which rotatably fits on a periphery of said first cylindrical portion in said circular groove.
Dependencies are inferred from the claim text.