Patent ID: 8210063
Filing Date: 2012-07-03
Classification: F16D,F16H,Y10T

Abstract:
1. A twin clutch type speed-change apparatus comprising: a transmission having a plurality of gear pairs disposed between a main shaft and a countershaft; and a twin clutch provided on the main shaft, a rotational drive force from a power source being connected/disconnected between the transmission and the power source by the twin clutch; wherein the main shaft is composed of an inner tube carrying odd speed-change step gears and an outer tube carrying even speed-change step gears; the twin clutch includes a first clutch adapted to connect/disconnect a rotational drive force transmitted to the inner tube and a second clutch adapted to connect/disconnect a rotational drive force to the outer tube; the gear pairs are each composed of an axially slidably attached slidable gear and axially non-slidably attached non-slidable gear to select one gear pair for transmitting the rotational drive force to the countershaft; the slidable gears are each provided on a corresponding one of the inner tube, the outer tube and the countershaft and are each slid by a corresponding one of shift forks each engaging a corresponding one of the slidable gears to connect/disconnect the rotational drive force between the slidable gear and the non-slidable gear coaxially adjacent thereto; and a dog clutch is applied between the slidable gear and the non-slidable gear coaxially adjacent to the slidable gear to transmit a rotational drive force by engagement of two dog teeth with each of four dog holes, wherein the two dog teeth engaged with each of the four dog holes is applied to only the dog clutch between a first-speed driven gear (C