Center crank eccentrically oscillating speed reducer
AssigneeNabtesco Corporation
InventorKoji Nakamura
Life of this patent
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Abstract
The present invention provides a center crank eccentrically oscillating speed reducer enabled to increase the available cross-sectional area of a hollow hole, while the generation of large noises is suppressed, as compared with the conventional center crank eccentrically oscillating speed reducer. An eccentrically oscillating speed reducer (100) includes a case (110) configured to have internal teeth (111), a hollow crankshaft 120 configured to have an external gear 123, external gears 131 and (131) have external teeth 131a and 132a a carrier 140, and a transmission gear (160) configured to mesh with an input gear (150) and the external gear (123) and to transmit power transmitted from the input gear (150) to the external gear (123).
Claims4
A center crank eccentrically oscillating speed reducer, comprising:
- a first member configured to have internal teeth;
- a hollow crankshaft configured to have an external gear, to be disposed at a substantially center of said internal teeth, and to rotate with respect to said first member;
- an external gear member configured to have external teeth meshing with said internal teeth, to engage with said crankshaft and to be eccentrically moved by said crankshaft;
- a second member configured to engage with said external gear and to be rotated by said external gear with respect to said first member;
- and
- a transmission gear configured to mesh with an input gear and said external gear and to transmit power transmitted from said input gear to said external gear,
- wherein said transmission gear is rotatably supported by said second member.
Dependencies are inferred from the claim text.