| 摘要 |
PURPOSE:To miniaturize the constitution of engine room by a method in which one side of a case is led to the discharge port of an air cleaner chamber with a duct, and an exhaust port is provided on the other side of the case. CONSTITUTION:When a crankshaft 8a turns, air in the central part of the shaft 8a is sent toward the radial direction by the air blow blade 16 of a fixed tray 11a. The air is flowed from a drive pulley 11 to a follow pulley 12 in the case 9 of a change gear to cool the inside of the case 9 during the period when it goes to the air exhaust port on the rear side, whereby preventing the overheating of the case. Since the air introduced from the air supply port 15 is deprived of dust in an air cleaner chamber 17, no damage to the pulleys 11 and 12 and the V-belt 13 occurs. Since the air cleaner chamber 17 is integrally provided for engine and the filter is used in common, the structure of the cooler is simple in an integral and compact form with the change gear case 9. |
