| 摘要 |
PURPOSE:To effectively cool a belt while concentrating an air stream produced by a fan near the belt by arranging the belt within the cover side space inside a transmission case and providing a partition plate for partitioning the internal space for partitioning the internal space of the transmission case into two chambers. CONSTITUTION:Cooled air sucked in from an air suction passage 41 by a fin 23 provided on a fixed face 18 of a drive pulley 6 passes through the inside of a belt chamber 28 to cool a belt 10, and is exhausted through an air exhaustion passage 42 to the outside while changing to hot air. The inside of a transmission case 5 has been partitioned into a belt chamber 38 and an accessory chamber 39 by means of a packing 40, so that the outside air flows only through the belt chamber 38, and the cooled air is concentrated near the belt 10 with the increased flow rate as compared with a case where the air flows through the entire space within the transmission case 5. The partition plate between the belt chamber 38 and the accessory chamber 39 may be not the packing 40 but a plate made of a simple metal and synthetic resin, etc. |
