Transmission

摘要

In a transmission, a lubrication oil retention section is formed to surround an area around a circumferential part of a first gear that ranges from a lubrication oil storage region to the outside of the lubrication oil storage region. In the lubrication oil retention section, the lubrication oil scooped up by the rotation of the first gear is retained between the lubrication oil retention section and the first gear at the outside of the lubrication oil storage region. The lubrication oil retention section enables the first gear to splash the lubrication oil retained at the outside of the lubrication oil storage region, toward a receiver that flows the lubrication oil to various sliding parts of the transmission.

主权项

1. A transmission comprising:
a case; a plurality of gears rotatably supported in the case; lubrication oil contained in the case; a lubrication oil storage region in a bottom portion of the case, storing the lubrication oil, and enabling the stored lubrication oil to be scooped up by rotation of a first gear of the plurality of gears above the first gear; a receiver for flowing the lubrication oil scooped up upward by the rotation of the first gear to sliding parts of the gears; and a lubrication oil retention section having a U-letter shape that surrounds a circumferential surface and both side surfaces of a circumferential part of the first gear, the lubrication oil retention section extending from the lubrication oil storage region to an outside of the lubrication oil storage region at a portion on the circumferential part where the lubrication oil is splashed towards the receiver, and the lubrication oil retention section retaining the lubrication oil scooped up by the rotation of the first gear between itself and the first gear at the outside of the lubrication oil storage region and enabling the first gear to splash toward the receiver the lubrication oil retained at the outside of the lubrication oil storage region.