Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements
Patent
1989-09-08
1991-04-16
Herrmann, Allan D.
Machine element or mechanism
Gearing
Toothed gear and recirculated unconnected elements
74201, 74199, 741905, 475192, F16H 1508, F16H 1300
Patent
active
050072986
ABSTRACT:
An input shaft of a toroidal-type infinitely variable transmission is supported at opposite ends by respective bearings which are secured to a housing, and input and output disks and power rollers are mounted at an intermediate portion of the input shaft. The input shaft has a flange at one end which is connected to an engine, and a pressure adjusting Belleville washer is interposed between the inner end face of the flange and the outer end face of the bearing to bias the input shaft in the direction of the engine so that a predetermined pressing force is applied to the input and output disks and the power rollers during a period in which a small input torque is transmitted to the input shaft. As the input torque increases, the input shaft is moved axially together with a loading cam against the spring force of the Belleville washer, and the inner end face of the flange and the outer end face of the bearing directly abut each other so that a required reaction force is obtained. In this case, since a needle-shaped roller bearing is interposed between the inner peripheral surface of the bearing adjacent the flange and the outer peripheral surface of the inmput shaft, the sliding movement of the input shaft in the axial direction encounters a small frictional resistance.
REFERENCES:
patent: 2446409 (1948-08-01), Chilton
patent: 3165937 (1965-01-01), Tomaszek
patent: 3820408 (1974-06-01), Louis
patent: 3930415 (1976-01-01), Hoganson
patent: 4779880 (1988-10-01), Hyodo
patent: 4934206 (1990-06-01), Nakano
Herrmann Allan D.
Nippon Seiko Kabushiki Kaisha
Yip Winnie
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