| 摘要 |
[PROBLEM] TO SUPPRESS ABRASION OF A V-BELT IN A BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION TO ACHIEVE A LONG SERVICE LIFE. [MEANS FOR RESOLUTION] A BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION (30) IS ACCOMMODATED IN AN ENGINE UNIT (28) OF A MOTORCYCLE. THE BELT TYPE CONTINUOUSLY VARIABLE TRANSMISSION (30) COMPRISES A PRIMARY SHEAVE (71), A SECONDARY SHEAVE (72), AND A V-BELT (73), AT LEAST A PART OF THAT PORTION OF WHICH IS IN CONTACT WITH THE PRIMARY SHEAVE (71) AND THE SECONDARY SHEAVE (72), BEING FORMED F ROM A RESIN. A PLURALITY OF GROOVES ALIGNED AT PREDETERMINED PITCH IN A RADIAL DIRECTION AS VIEWED IN CROSS SECTION IN A RADIAL DIRECTION ARE F ORMED ON SHEAVE SURF ACES OF SHEAVE HALVES (71A, 71B) OF THE PRIMARY SHEAVE (71) AND SHEAVE HALVES (72A, 72B) OF THE SECONDARY SHEAVE (72) . P≤-O. 08KX 10-3 + 0. 18 IS MET WHERE P (MM) INDICATES PITCH OF THE GROOVES ARID K (HV) INDICATES SURFACE HARDNESS OF THE SHEAVE SURFACES. |
