F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/130
F16H 1/28 (2006.01) F16H 1/46 (2006.01)
Patent
CA 1288259
Abstract of the Disclosure In a differential planetary gear apparatus ac- cording to the present invention, a first shaft and a second shaft are rotatably supported in a casing. A sun gear is fixed to the first shaft. A fixed internal gear located in the casing is arranged concentric with the sun gear. A rotary internal gear connected to the second shaft is arranged coaxially with the fixed inter- nal gear, and has the difference M in the number of teeth with respect to the number of the teeth of the fixed internal gear. N (M ? N, N ? 1) planet gears, which revolve around the sun gear, are disposed at equal intervals circumferentially. Each planet gear has a first portion, engaged with the fixed internal gear, and a second portion, engaged with the rotary internal gear. Either one of the first and second portions of the planet gear is engaged with the sun gear. When the number of planet gears is designated circumferentially by i = 1, 2, ..., N, the phase of the teeth of the first portion of the i-th planet gear is shifted in the period of {(i-1)M}/N with respect to that of the teeth of the second portion. Thus, the phase of the teeth of the first portion can be shifted in response to the phase of the spaces of the fixed internal gear. Therefore, if at least one of the internal gears satisfies the assembling condition, the number of teeth of the other internal gear can be freely selected, irrespective of the number of the planet gears. In other words, the number of teeth of the internal gears and the speed ratio can be freely selected, irrespective of the number of planet gears.
543024
Marks & Clerk
Nec Toshiba Space Systems Ltd.
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