| 摘要 |
PURPOSE:To prevent occurrence of bubbles in oil by providing a first communicating hole on the upper part of a bulkhead between a crankcase and a transmission side room, a second communicating hole on the lower part of a bulkhead between the transmission side room and a transmission chamber, and arranging an oil pump suction hole in the transmission chamber. CONSTITUTION:A crankcase 4 is separated from a transmission chamber 5 by a bulkhead, and the transmission chamber 5 is separated from transmission chamber side rooms 12 and 13 by sidewalls 10 and 11. The crankcase communicates with transmission side rooms 12 and 13 through first communicating holes 14 and 15 on the upper parts of the sidewalls 10 and 11, and the transmission side rooms 12 and 13 also communicate with the transmission chamber 5 through second communicating holes 16 and 17 on the lower parts of the sidewalls 10 and 11. An oil pump 18 and its suction hole 19 are arranged in the transmission chamber 5. According to the pressure of the crankcase, the oil level in the side rooms 12 and 13 are lowered below that in the transmission chamber, so occurrence of bubbles can be prevented. |
