| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving belt cooling structure of an engine capable of suppressing the deterioration thereof due to temperature rise by increasing the cooling efficiency of a V-belt without causing problems with an increase in the width of the engine and an increase in the number of parts. SOLUTION: In this driving belt cooling structure of the engine in which a transmission case 66 storing a V-belt continuously variable transmission mechanism 21 therein is disposed at one side part of the crankcase 26 in the direction of a crankshaft, the continuously variable transmission mechanism 21 is formed by installing a drive pulley 51 on a drive shaft disposed coaxially with the crankshaft 22 and a driven pulley 53 on a transmission shaft 52 disposed parallel with the drive shaft 50, and winding a V-belt 54 on both pulleys 51 and 53. The outer end part 50d of the drive shaft 50 is pivotally supported on a support member 77 fixed to the crankcase 26, and a wind guide plate 77m guiding cooling air led into the transmission case 66 to the V-belt 54 is formed integrally with the support member 77. COPYRIGHT: (C)2004,JPO
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