| 摘要 |
An object of the present invention is to provide an oil tank structure capable of cooling oil flowing into the oil tank to properly adjust the oil temperature, and also capable of preventing overcooling. The oil tank structure includes a tank portion; an oil introducing portion that is provided in a sidewall of the tank portion and introduces oil in a direction tangential to the sidewall; at least one groove-like passage portion that is formed along a circumference of the sidewall so to allow the introduced oil to flow in and out; an oil cooling portion that is provided on the sidewall and cools the groove-like passage portion; and an outlet formed in a bottom of the tank portion. By such an oil tank structure, oil having a high temperature easily flows into the groove-like passage portion due to its low viscosity, and is cooled by the oil cooling portion. On the other hand, oil having a low temperature is prevented from flowing into the groove-like passage portion, and is less likely to be cooled by the oil cooling portion. Accordingly, overcooling of the oil can be suppressed. |
