GEAR DEVICE AND VEHICLE HAVING SAME MOUNTED THEREON

摘要

Provided are: a gear device configured so that the temperature and the amount of lubricating oil for cooling and lubricating driving gears are adjusted to levels corresponding to the speed of the vehicle; and a vehicle having the gear device mounted thereon. A transmission (gear device)(1) is configured so that lubricating oil (OL) is supplied by a circulation pump (13) from the lower part of the housing (11) of the transmission (1) to a heat exchanger (12) and the heat exchanger (12) exchanges heat between engine coolant (W) and the lubricating oil (OL) to adjust the temperature of the lubricating oil (OL). The level of the lubricating oil (OL) retained in an oil pan (11a) when the circulation pump (13) is stopped is defined as the highest oil level (L1), and the level of the lubricating oil (OL) retained in the oil pan (11a) when the amount of the lubricating oil (OL) pumped up by the circulation pump (13) is maximum is defined as the lowest oil level (L2). The heat exchanger (12) is disposed at a position which is outside the housing (11) and which is higher than the highest oil level (L1), and in order to adjust the height of the level of the oil (OL) fluctuating between the highest oil level (L1) and the lowest oil level (L2), the transmission (1) comprises a control device (20) for controlling the amount of the oil pumped up by the lubrication pump (13).