Ring CVT

Abstract

The present invention realizes a structure of a toroidal continuously variable transmission that is easy to manufacture, manage, and assemble, and is easy to achieve low cost, stable shifting operation, and easy to process. By engaging the concave portion (24) provided on the outer surface of the outer ring (16b) and the cylindrical convex surface (22) of the support beam portion (23a) of the trunnion (7b), the outer surface of the thrust rolling bearing can be supported in a swinging manner. Circle (16b). On the inner surface of the concave part (24), the groove (27) formed in the circumferential direction centering on the support beam part (23a) is engaged with the protrusion (28) formed on the outer peripheral surface of the support beam part (23a). , to limit the displacement of the outer ring (16b) in the axial direction of the supporting beam portion (23a). The groove (27) is a tapered groove with a wide opening and a narrow bottom, and the protrusion (28) is a tapered protrusion with a wide base and a narrow top.

Description

Technical field [0001] The present invention relates to a semi-ring type toroidal continuously variable transmission, which is used as an automatic transmission for vehicles such as automobiles, automatic transmissions for construction machinery, automatic transmissions for generators used in aircrafts, etc., and for regulating pumps, etc. Automatic transmission for the operating speed of various industrial machinery. Background technique [0002] As described in Japanese Patent Application Publication No. 2003-214516, Japanese Patent Application Publication No. 2007-315595, Japanese Patent Application Publication No. 2008-25821, Japanese Patent Application Publication No. 2008-275088, etc., a half ring is used as a transmission for automobiles The toroidal type continuously variable transmission is well known. In addition, Japanese Patent Application Publication No. 2004-169719 and the like describe a structure that combines a toroidal continuously variable transmission and a p...

AI Technical Summary

Problems solved by technology

At this time, since the side surfaces of the protrusions as the processing surface are parallel to each other, in other words, since these side surfaces are perpendicular to the rotation axis of the grindstone, the temperature of these side surfaces rises, and grinding burns are likely to occur.

In addition, since the axial direction of the rotating shaft of the grindstone is parallel to the pressing direction, the side surface of the protrusion and the cylindrical convex surface cannot be ground at the same time, the processing efficiency is poor, and the manufacturing cost of the trunnion as a whole increases.

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