Toroidal-type continuously variable transmission

Abstract

A toroidal-type continuously variable transmission, has a first continuously variable transmission mechanism and a second continuously variable transmission mechanism: wherein the first and second continuously variable transmission mechanisms are disposed coaxially with each other; the first and second input disks are connected together so as to be rotated in synchronization with each other; the first and second output disks are formed as a unified type output disk including traction surfaces on the two side surfaces thereof; on the side portion at the outer-most outside diameter of the unified type output disk, there is formed a datum plane serving as a machining datum when the traction surfaces are processed; and, an operation for finishing the datum plane is carried out after the unified type output disk is heat treated.

What is claimed is:  
     
         1 . A toroidal-type continuously variable transmission, comprising a first continuously variable transmission mechanism and a second continuously variable transmission mechanism: said first continuously variable transmission mechanism including a first input disk, a first output disk disposed so as to be opposed to said first input disk and, a pair of first power rollers respectively held between said first input and output disks; and, said second continuously variable transmission mechanism including a second input disk, a second output disk disposed so as to be opposed to said second input disk and, a pair of second power rollers respectively held between said second input and output disks, 
 wherein said first and second continuously variable transmission mechanisms are disposed coaxially with each other;    said first and second input disks are connected together so as to be rotated in synchronization with each other;    said first and second output disks can be rotated integrally with each other;    said first and second output disks are formed as a unified type output disk including on the two side surfaces thereof traction surfaces to be contacted with said pair of first power rollers and said pair of second power rollers;    on the side portion at the outer-most outside diameter of said unified type output disk, there is formed a datum plane serving as a machining datum when said traction surfaces are processed; and,    an operation for finishing said datum plane is carried out after said unified type output disk is heat treated.    
     
     
         2 . A toroidal-type continuously variable transmission comprising a first continuously variable transmission mechanism and a second continuously variable transmission mechanism: said first continuously variable transmission mechanism including a first input disk, a first output disk disposed so as to be opposed to said first input disk and, a pair of first power rollers respectively held between said first input and output disks; and, said second continuously variable transmission mechanism including a second input disk, a second output disk disposed so as to be opposed to said second input disk, and a pair of second power rollers respectively held between said second input and output disks, 
 wherein said first and second continuously variable transmission mechanisms are disposed coaxially with each other;    said first and second input disks are connected together so as to be rotated in synchronization with each other;    said first and second output disks can be rotated integrally with each other;    said first and second output disks are formed as a unified type output disk including on the two side surfaces thereof traction surfaces to be contacted with said pair of first power rollers and said pair of second power rollers;    on the end face at the outer-most outside diameter of said unified type output disk, there is formed a stepped portion projected from said end face and serving as a machining datum when said traction surfaces are processed; and,    an operation for finishing said stepped portion is carried out after said unified type output disk is heat treated.    
     
     
         3 . The toroidal-type continuously variable transmission as set forth in  claim 2 , wherein said stepped portion is cut and removed after said traction surfaces are processed.  
     
     
         4 . A toroidal-type continuously variable transmission, comprising a first continuously variable transmission mechanism and a second continuously variable transmission mechanism: said first continuously variable transmission mechanism including a first input disk, a first output disk disposed so as to be opposed to said first input disk, and, a pair of first power rollers respectively held between said first input and output disks; and, said second continuously variable transmission mechanism including a second input disk, a second output disk disposed so as to be opposed to said second input disk, and, a pair of second power rollers respectively held between said second input and output disks, 
 wherein said first and second continuously variable transmission mechanisms are disposed coaxially with each other;    said first and second input disks are connected together so as to be rotated in synchronization with each other;    said first and second output disks can be rotated integrally with each other;    said first and second output disks are formed as a unified type output disk including on the two side surfaces thereof traction surfaces to be contacted with said pair of first power rollers and said pair of second power rollers;    in the end face at the outer-most outside diameter of said unified type output disk, there is formed a groove portion serving as a machining datum when said traction surfaces are processed; and,    an operation for finishing said groove portion is carried out after said unified type output disk is heat treated.