Gearbox

Abstract

Provided is a gearbox provided with a lubrication structure wherein a lubricant that has been distributed can be efficiently supplied to each location to be lubricated, and the power loss is small. The gearbox is comprised of shaft bodies supported by a case (10) in the axial directions of the shaft bodies; a plurality of gears which are supported by the shaft bodies and which are rotatably coupled to the shaft bodies by a shift clutch; a large-diameter gear (80) among the plurality of gears, which has a lower portion immersed in a lubricant contained in a lubricant storage area (91) formed in the lower portion of the case (10) and which rotates to distribute the lubricant upwardly; and a receiver (92) which extends in a direction of the rotational axis of the large-diameter gear (80) to collect the distributed lubricant and circulate the lubricant to locations to be lubricated. The receiver (92) is comprised of a vertical wall (92d) having a surface on which the lubricant that has been distributed to disperse above the receiver impinges and moves downwardly, to introduce the lubricant to a collecting portion of the receiver, and an introduction portion (94) having a surface on which the lubricant that disperses between the receiver (92) and the large-diameter gear (80) flows due to the inertia force, to introduce the lubricant to a collecting portion (92a).

Description

technical field [0001] The present invention relates to a transmission lubricated so that lubricating oil is drawn up by a transmission gear. Background technique [0002] Conventionally, among vehicular transmissions that adjust the driving force and rotational speed of an internal combustion engine or the like, there is a transmission that is lubricated so that lubricating oil is drawn up by a transmission gear. For example, in the transmission disclosed in Patent Document 1, which discloses a lubricating mechanism for a transmission having an oil reservoir, lubricating oil picked up by a speed change gear is received by the oil reservoir and directed to the tooth surfaces of other speed change gears and the inside of each shaft. Supply lubricating oil. The oil storage container is arranged above the speed change gear, and has a bobbin shape with an upper opening. Furthermore, the lubricating oil which is carried up and scattered by the rotation of the transmission gear ...

AI Technical Summary

Problems solved by technology

[0004] However, in the tubular shape of the oil storage container disclosed in Patent Document 1, since the lubricating oil brought up by the rotation of the transmission gear flies so as to be perpendicular to the longitudinal direction of the oil storage container, It is difficult to recover the lubricating oil that passes above and below the oil storage container

Therefore, the required amount of lubricating oil cannot be collected by the oil storage container, and since it cannot be supplied sufficiently, there is a concern that the lubricating oil on the tooth surfaces of other transmission gears and inside each shaft will be insufficient.

In addition, since the total amount of lubricating oil brought up by the rotation of the transmission gear cannot be used for lubrication, the transmission gear does useless work, and the transmission loses power, which may have a great impact on the driving and fuel consumption of the vehicle.

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