Power transmission device

A power transmission device comprising:

• a continuously variable transmission mechanism configured to perform power transmission between a drive source and a drive wheel;
• a first oil passage communicating between a primary pulley oil chamber of the continuously variable transmission mechanism and a secondary pulley oil chamber of the continuously variable transmission mechanism;
• an electric oil pump provided in the first oil passage;
• a second oil passage branching from the first oil passage between the electric oil pump and the primary pulley oil chamber and communicating with an oil reservoir;
• a switching valve provided at a branch point of the first oil passage and the second oil passage;
• and
• a third oil passage branching from the first oil passage between the electric oil pump and the secondary pulley oil chamber and reaching the switching valve,
• wherein the switching valve is configured to switch between two positions, the two positions being a first position that causes at least the first oil passage to be in a communicating state, and a second position that causes the second oil passage and the first oil passage on a secondary pulley oil chamber side to be in a state of communicating with each other and causes the third oil passage and the first oil passage on a primary pulley oil chamber side to be in a state of communicating with each other.