Patent ID: 8528432
Filing Date: 2013-09-10
Classification: F16H,Y10T

Abstract:
1. A twin clutch transmission for a large-sized vehicle, comprising an input shaft connected to an engine; an intermediate shaft of odd-numbered gear range and an intermediate shaft of even-numbered gear range, which are arranged in parallel to said input shaft; an output shaft arranged in parallel to said intermediate shaft of odd-numbered gear range and said even-numbered gear range; an input gear of odd-numbered gear range and an input gear of even-numbered gear range, which are rigidly installed on said input shaft to transfer the revolution of said input shaft to the intermediate shaft of either of said intermediated shaft of odd-numbered gear range or said intermediate shaft of even-numbered gear range; a main transfer gear of odd-numbered gear range rotatably installed on said intermediate shaft of odd-numbered gear range; a main friction clutch of odd-numbered gear range that couples said main transfer gear of odd-numbered gear range with said intermediate shaft of odd-numbered gear range; a main transfer gear of even-numbered gear range rotatably installed on said intermediate shaft of even-numbered gear range; a main friction clutch of even-numbered gear range that couples said main transfer gear of even-numbered gear range with said intermediate shaft of even-numbered gear range; a plurality of speed-change gears of odd-numbered gear range rotatably installed on said intermediate shaft of odd-numbered gear range; a plurality of speed-change gears of even-numbered gear range rotatably installed on said intermediate shaft of even-numbered gear range; a plurality of output gears rigidly installed on said output shaft with each of which gears one speed-change gear of odd-numbered gear range and one speed-change gear of even-numbered gear range that is one range higher than that of such one speed-change gear of odd-numbered gear range are meshed; and a mechanical clutch installed on each of said intermediate shaft of odd-numbered gear range and said intermediate shaft of even-numbered gear range to selectively make mechanical interlock engagement with one of said speed-change gears, wherein the numbers of gear teeth of said speed-change gear of odd-numbered gear range and said speed-change gear of even-numbered gear range, both of which mesh with the same output gear of said output gears, are made to be identical; the gear ratio of said input gear of even-numbered gear range and said input gear of odd-numbered gear range are configured so that the ratios of the speed-change ratios between the adjoining gear ranges terms a geometric progression; a clutch synchronization mechanism is provided, which makes the speed of revolutions of the intermediate shaft of either of said intermediate shaft of odd-numbered gear range or said intermediate shaft of even-numbered gear range, on which any of said speed-change gears of gear-shifting destination is installed, and the speed of revolutions of the intermediate shaft of either of said intermediate shaft of even-numbered gear range or said intermediate shaft of odd numbered gear range to be synchronized each other by linking the intermediate shaft of either of said intermediate shaft of odd-numbered gear range or said intermediate shaft of even-numbered gear range, on which the speed-change gear of either of said speed-change gear of odd-numbered gear range or said speed-change gear of even numbered gear range is installed, to said input shaft via either of said input gear of odd-numbered gear range and said main transfer gear of odd-numbered gear range and said main friction clutch of odd-numbered gear range or said input gear of even-numbered gear range and said main transfer gear of even-numbered gear range and said main friction clutch of even-numbered gear range; and said mechanical clutch, which is associated with said speed-change gear and makes selective mechanical interlock engagement therewith, is preliminarily engaged with any of said speed-change gears of the gear-shifting destination prior to the changing of gear range.