Twin clutch transmission for large-sized vehicle
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United States of America Patent
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Sep 10, 2013
Grant Date -
Dec 22, 2011
app pub date -
Feb 25, 2010
filing date -
Mar 11, 2009
priority date (Note) -
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Abstract
A twin clutch type transmission that permits a quick shifting of a mechanical clutch without shock. Numbers of gear teeth of speed-change gears of odd and even-numbered gear ranges, which mesh with the same output gear, are made to be identical each other; gear ratios of input gear trains of even and odd-numbered gear ranges are configured so that the speed-change ratios between adjoining gear ranges will form a geometric progression; and gear ratios between speed-change gears of odd and even-numbered gear ranges are configured to be proportional to square of the common ratio. In speed-changing intermediate shaft on which the speed-change gear is installed is coupled with input shaft through friction clutch, and speeds of revolutions of the speed-change gear and the intermediate shaft on which such speed-change gear is installed are brought into synchronized state.
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