ANGULAR BEARING OF DOUBLE CAVITY FORM TOROIDAL CONTINUOUSLY VARIABLE TRANSMISSION

• Main Authors: ITO HIROYUKI, KATO HIROSHI, GOTO NOBUO, FUJINAMI MAKOTO
• Format: Patent
• Language: English
• Published: 03.08.1999
• Edition: 6
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To improve the durability of a bearing and also reduce a drive loss and extend a life and increase an efficiency by specifying the size of respective parts of an angular bearing and a lubrication route at a design time. SOLUTION: A disc side track groove 80 is formed on the inner diameter part of an installation hole provided on the center of a cam disc 8 and holds an axis side track groove 70 formed on the outer periphery surface of a projection shape jaw 7 provided peripherally on the end of a torque input shaft 3 as well as plural balls 9. A holder 10 for installing the balls 9 at a proper interval respectively is arranged between the axis side track groove 70 and the disc side track groove 80. The angular contact angle α with the axis side track groove 70 and the angular contact angle α between the ball 9 and disc side track groove 80 are made by 60 deg. or less respectively and the carvature radius of the groove surface of the axis side track groove and the carvature radius of the groove surface of the disc side track groove are made by 52% or more and 55% or less of the ball 9 diameter respectively, thereby achieving the increase of a speed change efficiency.