Oil recovery mechanism of power transmission device

Abstract

Provided is an oil recovery mechanism of a power transmission device capable of always recovering oil into an oil tank regardless of forward or reverse rotation of a rotating member. The oil recovery mechanism houses, in a case storing oil in a bottom part, a carrier (rotating member) rotating due to a drive force from an electric motor (drive source), and an oil tank having an opening open in a tangential direction on an upper part of an outer periphery of the carrier. The oil recovery mechanism scrapes up the oil by rotation of the carrier with a part immersed in the oil stored in the case to recover the oil into the oil tank. The opening of the oil tank includes a current straightening plate rotating due to a kinetic energy of the oil scraped up by the carrier to guide the oil to the oil tank. In addition, the width of the straightening plate is set to be equal to the width of the carrier.

Description

technical field [0001] The present invention relates to an oil recovery mechanism for recovering oil stirred up by the rotation of a rotating member accommodated in a housing of a power transmission device to an oil tank in the housing, and more particularly to a power transmission device oil recovery mechanism. Background technique [0002] For example, in a power transmission device of a vehicle, rotating components such as various gears are accommodated in a casing, and an oil bath method is sometimes used as a lubrication method thereof. Stir up the lubricating oil at the bottom of the machine, and use the oil that has been stirred up to lubricate each part. According to this oil bath method, part of the rotating member is immersed in the oil that has accumulated in the bottom of the casing, so when the rotating member stirs up the oil, the drag resistance (stirring resistance) due to the viscosity of the oil increases, This becomes one cause of the power loss of the d...

AI Technical Summary

Problems solved by technology

[0009] However, in the oil recovery mechanisms proposed in Patent Document 1 and Patent Document 2, there is a problem that the oil can be recovered into the oil tank only when the rotating member rotates in one direction (forward rotation), and when the rotating member rotates in the other direction, the oil can be recovered into the oil tank. Oil cannot be recovered into the tank when the direction is rotated (reversed)

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