Power transmission device
A power transmission device includes: a case including a first oil reservoir configured to be able to store oil, a second oil reservoir configured to be able to store the oil, and a partition wall configured to separate the first oil reservoir and the second oil reservoir; the oil sealed in the case; a rotating member configured to be able to be in contact with the oil in the first oil reservoir; and an oil supplying unit configured to be able to supply the oil in the second oil reservoir to the first oil reservoir. The oil supplying unit is configured to be able to adjust an amount of the oil in the second oil reservoir supplied to the first oil reservoir.
1. A power transmission device comprising:
a case including a first oil reservoir configured to be able to store oil, a second oil reservoir configured to be able to store the oil, and a partition wall configured to separate the first oil reservoir and the second oil reservoir;
the oil sealed in the case;
a rotating member configured to be able to be in contact with the oil in the first oil reservoir;
an oil supplying unit configured to be able to supply the oil in the second oil reservoir to the first oil reservoir, wherein
the oil supplying unit is configured to be able to adjust an amount of the oil in the second oil reservoir supplied to the first oil reservoir;
an oil cooler that is provided outside the case and that is configured to be able to cool the oil by causing heat exchange between the oil and a cooling medium; and
a control unit configured to control the oil supplying unit, wherein the control unit is configured to, when a request is received from equipment that is supplied with the cooling medium flowing out of the oil cooler, increase the amount of the oil in the second oil reservoir supplied to the first oil reservoir by the oil supplying unit.
2. The power transmission device according to claim 1 , wherein the oil supplying unit is constituted by an oil pump.
3. The power transmission device according to claim 1 , wherein the oil supplying unit is configured to adjust the amount of the oil in the second oil reservoir supplied to the first oil reservoir by the oil supplying unit such that an oil level of the oil is positioned at a height that at least a lower part of the rotating member is immersed in the oil, and to raise temperature of the oil in the first oil reservoir by rotation of the rotating member.
4. The power transmission device according to claim 1 , wherein:
the second oil reservoir is disposed above the first oil reservoir; and
the rotating member is configured to scoop up the oil in the first oil reservoir toward the second oil reservoir.