Planetary gear device

Details Planetary gear device Planetary gear device

2005-03-15

2005-03-15

Lorence, Richard M. (Department: 3681)

Planetary gear transmission systems or components

Planetary gearing or element

C475S346000

Reexamination Certificate

active

06866608

ABSTRACT:
A planetary gear device includes a first, a second, and a third ring-shaped member that are concentrically arranged in that order from the inside. A sun gear is coaxially fixed to an end surface of the first ring-shaped member, planet shafts of planet gears are supported on an end surface of the ring-shaped member, and an internal gear is coaxially fixed to an end surface of the third ring-shaped member. A first cross roller bearing is formed between the first and second ring-shaped members and a second cross roller bearing is formed between the second and third ring-shaped members. Each member is arranged concentrically on a plane that is perpendicular to the device axis, so that a planetary gear device that is extremely slim in the device axial direction can be realized. Since the respective gear parts can be accessed from both sides in the device axial direction, the input and output can be laid out with great freedom.

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