Patent ID: 8555740
Filing Date: 2013-10-15
Classification: F16D,F16H,Y10T

Abstract:
1. A transmission for an internal combustion engine, comprising: a main shaft; a countershaft disposed in parallel with the main shaft; and a shifting gear group disposed between the main shaft and the countershaft, the shifting gear group including: shift gears fitted axially slidably into shaft-side spline portions formed in at least either the main shaft or the countershaft; the transmission selectively performing gear shifting by using shift forks to slidingly move the shift gears axially and by using dog clutches to engage the shift gears with, or disengage the shift gears from, adjacent gears; wherein when the shift gear slidingly moves, a gear-side spline portion of the shift gear slidingly moves over the shaft-side spline portion, wherein on at least either the main shaft or the countershaft, a splined portion of the shift gear, in which the gear-side spline portion is formed, has an axially protruding protrusion formed on an end portion of the splined portion on a side spaced apart from a sixth dog clutch; and the protrusion protrudes from a shaft end portion in which the shaft-side spline portion is disposed.