Patent ID: 11859695
Assignee: TRANSMISIONES Y EQUIPOS MECANICOS, S.A. DE CV
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A gearbox for use in a vehicular transmission, comprising:
an inner input drive shaft and an outer input drive shaft both transmitting torque from a dual-clutch to the gearbox,
a counter-shaft for output of torque and configured for operable connection to wheels of the vehicle via one or more gears and a differential,
wherein
the outer input drive shaft supports gears for 4 forward even-number gear speeds and 1 reverse gear direction, and the inner input drive shaft supports gears for 4 forward odd-number gear speeds, each gear meshed with a corresponding gear pair on the counter-shaft, the reverse gear meshed via an idler gear with the corresponding gear pair on the counter-shaft,
a gear speed is selected by an axial movement of an axially adjacent synchroniser sleeve of a corresponding synchroniser, said synchroniser sleeve being rotationally fixed and axially slidable relative to one of the shafts and the selected gear being revolutely attached to the same shaft, wherein the axial movement of the adjacent synchroniser sleeve engages the selected gear and rotationally fixes the selected gear with respect to the same shaft as the synchroniser, the selected forward gear or selected reverse gear via the idler gear being meshed with a gear pair permanently rotationally and permanently axially fixed to the other shaft; and,
the permanently rotationally and permanently axially fixed gear is the radially smaller of the gear pair, and
wherein one gear of the gear pair corresponding to ear speeds 4th, 6th, 5th, 7th, and 8th is each permanently rotationally and permanently axially fixed to the counter-shaft, and
one ear of the gear pair corresponding to gear speeds 4th and 6th is each combined as a cluster gear that has a shrink fit connection to the counter-shaft to rotationally fix the cluster to the counter-shaft; and/or,
one gear of the gear pair corresponding to gear speeds 5th and 7th is each combined as a cluster gear that has a shrink fit connection to the counter-shaft shaft to rotationally fix the cluster to the counter-shaft.