US 6,981,928 B2 | ||
Continuously variable transmission apparatus | ||
Eiji Inoue, Kanagawa (Japan) | ||
Assigned to NSK Ltd., Tokyo (Japan) | ||
Filed on Apr. 10, 2003, as Appl. No. 10/410,210. | ||
Claims priority of application No. P. 2002-110919 (JP), filed on Apr. 12, 2002. | ||
Prior Publication US 2003/0220167 A1, Nov. 27, 2003 | ||
Int. Cl. F16H 37/02 (2006.01) |
U.S. Cl. 475—216 | 9 Claims |
1. A continuously variable transmission apparatus having a combination of a toroidal-type continuously variable transmission
unit and a planetary-gear-type transmission unit,
said toroidal-type continuously variable transmission unit comprising:
a first rotary shaft;
a pair of outside disks connected together through said first rotary shaft in such a manner as to be concentric with each
other and be rotatable in synchronization with each other;
at least one inside disk supported between said two outside disks in such a manner as to be concentric with said two outside
disks and be rotatable independently of said two outside disks; and,
a plurality of power rollers interposed and held by two or more each between the two side surfaces of said inside disk and
the side surfaces of said two outside disks for transmitting power between said inside disk and said two outside disks,
said planetary-gear-type transmission unit, comprising:
a carrier concentrically connected and fixed to said pair of outside disks in such a manner as to be rotatable together with
said two outside disks;
a plurality of first planetary gears rotatably supported on one of the side surfaces of said carrier facing one of said two
outside disks;
a hollow rotary shaft disposed on the periphery of said first rotary shaft;
a first sun gear connected to said inside disk by said hollow rotary shaft in such a manner as to be concentric with said
inside disk and said outside disks as well as be rotatable, said first sun gear being meshed with said first planetary gears;
a plurality of second planetary gears rotatably supported on the other side surface of said carrier;
a second sun gear disposed in such a manner as to be concentric with said inside disk and said outside disks as well as be
rotatable, said second sun gear being meshed with said second planetary gears; and
a single ring gear disposed in such a manner as to be concentric with said inside disk and said outside disks as well as be
rotatable, said first and second planetary gears being meshed with said single ring gear while said first and second planetary
gears are supported on said carrier independently of each other; and,
a second rotary shaft supported in such a manner as to be concentric with said first rotary shaft and be rotatable with respect
to said first rotary shaft, said second rotary shaft being connected to said second sun gear.
|