Toroidal continuously variable transmission
AssigneeNissan Motor Co., Ltd.
InventorTakeshi Yamamoto
Life of this patent
Estimating the term…
Abstract
A toroidal continuously variable transmission including an input shaft rotatably disposed within a casing, an input disk connected with the input shaft, an output disk cooperating with the input disk to form a toroidal cavity between opposed surfaces thereof, a power roller rotatably disposed in the toroidal cavity, and an output shaft receiving the torque via the power roller and the output disk. Input and output shafts are rotatably supported by input and output bearings. Each of the input and output bearings includes a taper-roller bearing and a radial bearing arranged parallel to the taper-roller bearing. The taper-roller bearing has an outer race contact angle of not less than 45 degrees between the rotation axis and the mutual contact of an outer race and tapered rollers.
Claims21
A toroidal continuously variable transmission for a vehicle engine, comprising:
- a casing;
- an input shaft rotatably disposed within the casing, the input shaft being adapted to receive a torque from the engine;
- an input disk connected with the input shaft;
- an output disk cooperating with the input disk to form a toroidal cavity between opposed surfaces thereof;
- a power roller rotatably disposed in the toroidal cavity;
- a loading member applying a force corresponding to the torque to the input and output disks so as to make frictional contact between the power roller and the opposed surfaces of the input and output disks;
- an output shaft receiving the torque via the power roller and the output disk;
- an input bearing rotatably supporting the input shaft within the casing;
- and
- an output bearing rotatably supporting the output shaft within the casing,
- each of the input and output bearings comprising a taper-roller bearing having a rotation axis and a radial bearing arranged parallel to the taper-roller bearing with respect to the rotation axis, the taper-roller bearing comprising an inner race, an outer race and a plurality of tapered rollers contacted with the inner and outer races, the taper-roller bearing having an outer race contact angle of not less than 45 degrees between the rotation axis and the mutual contact of the outer race and the tapered rollers.
A toroidal continuously variable transmission, comprising:
- a casing;
- an input shaft rotatably disposed within the casing;
- an input disk coaxially connected with the input shaft;
- an output disk arranged in coaxial and opposed relation to the input disk, the output disk cooperating with the input disk to form a toroidal cavity between opposed surfaces thereof;
- an output shaft coaxially and rotatably connected with the output disk;
- a power roller rotatably disposed within the toroidal cavity in contact with the opposed surfaces of the input and output disks;
- a loading member applying a thrust force to the input and output disks;
- an input bearing rotatably supporting the input shaft within the casing;
- and
- an output bearing rotatably supporting the output shaft within the casing,
- each of the input and output bearings comprising a thrust bearing having a rotation axis and a radial bearing arranged parallel to the thrust bearing with respect to the rotation axis, the thrust bearing comprising an inner race, an outer race on which the thrust force applied by the loading member acts, and a plurality of tapered rollers in contact with the inner and outer races, the thrust bearing having an outer race contact angle of not less than 45 degrees between the rotation axis and the mutual contact of the outer race and the tapered rollers.
Dependencies are inferred from the claim text.