F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/118
F16H 1/28 (2006.01) F16H 1/36 (2006.01) F16H 57/02 (2006.01)
Patent
CA 1231555
ABSTRACT OF THE DISCLOSURE An improvement is provided in a planetary gear transmission. The transmission includes a unitary sun gear having an inner gear portion and two outer sun gear boss portions, the boss portions being formed with the sun gear as one piece. It also includes a least one planetary gear assembly which is comprised of a planetary gear ring meshed with the sun gear, two unitary planetary discs each having an outer thrust projection which is in at least intermittent rolling contact with the sun gear boss portions and which each have an inwardly-projecting boss supporting the inner surface of the planetary gear ring and sandwiching the planetary gear ring therebetween, and a planetary shaft for supporting the planetary gear ring and the planetary discs. It also includes a carrier assembly for receiving the planetary shaft and for rotatably supporting the planetary gear assembly, and an outer, inner-toothed unitary ring gear having an outer ring gear located between two outer cylindrical extension portions, the outer ring gear being meshed with the planetary gear ring, and the outer cylindrical extension portions being in at least intermittent rolling contact with the thrust projections of the unitary planetary discs. In such transmission, the outer thrust projections of the unitary planetary discs have a greater diameter than the tooth edge circle of the planetary gear ring, the sun gear boss portions have smaller diameters than the tooth- root circle of the sun gear, and the outer cylindrical extension Abstract of the Disclosure (continued page 2) portions have greater diameters than the tooth-root circle of the outer inner-toothed unitary rink gear. In this way, the two unitary planetary discs serve both to restrain the sun gear from axial movement and to restrain the planetary gear ring from radial movement.
476874
Borden Ladner Gervais Llp
Matex Co. Ltd.
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