PLANETARY GEAR REDUCER
First Claim
1. A planetary gear reducer comprising:
- a sun gear fixed concentrically to a power input shaft;
a ring gear provided along an outer periphery of the sun gear;
a plurality of planet gears meshing with the sun gear and the ring gear;
a plurality of planet shafts, each of which is a rotational axis of a corresponding one of the plurality of planet gears;
a planet carrier configured to support the plurality of planet shafts, and to output revolution of the plurality of planet gears around the input shaft as first power; and
a cylindrical support including, at its one part along a direction of a central axis of the input shaft, a flexible structure which is curved radially inward and has a V-shaped longitudinal section, the cylindrical support being connected to the ring gear such that the cylindrical support is non-rotatable relative to the ring gear, the cylindrical support being configured to output rotation of the ring gear as second power.
1 Assignment
0 Petitions
Accused Products
Abstract
A planetary gear reducer (1) includes: a sun gear (5) having external teeth and fixed concentrically to a power input shaft (3); a plurality of planet gears (7) having external teeth and mashing with the sun gear (5); a ring gear (9) having internal teeth and meshing with the planet gears (7); a planet carrier (11) configured to support a plurality of planet shafts (13), each of which is a rotational axis of a corresponding one of the planet gears (7), and to output revolution of the plurality of planet gears (7) as first power; and a cylindrical support (27) connected to the ring gear (9) such that the cylindrical support (27) is non-rotatable relative to the ring gear (9), the cylindrical support (27) being configured to output rotation of the ring gear (9) as second power. The cylindrical support (27) includes, at its one part along the direction of a central axis, a flexible structure (41) which is curved radially inward and has a V-shaped longitudinal section. This configuration makes it possible to both obtain rigidity and prevent misalignment while suppressing an increase in the weight of the gear reducer.
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Citations
10 Claims
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1. A planetary gear reducer comprising:
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a sun gear fixed concentrically to a power input shaft; a ring gear provided along an outer periphery of the sun gear; a plurality of planet gears meshing with the sun gear and the ring gear; a plurality of planet shafts, each of which is a rotational axis of a corresponding one of the plurality of planet gears; a planet carrier configured to support the plurality of planet shafts, and to output revolution of the plurality of planet gears around the input shaft as first power; and a cylindrical support including, at its one part along a direction of a central axis of the input shaft, a flexible structure which is curved radially inward and has a V-shaped longitudinal section, the cylindrical support being connected to the ring gear such that the cylindrical support is non-rotatable relative to the ring gear, the cylindrical support being configured to output rotation of the ring gear as second power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification