Transmission device of four-wheel drive vehicle
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorKazuo Kanazawa
Life of this patent
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Abstract
A transfer drive gear is provided at the rear end of a hollow counter shaft disposed under an input shaft. A reduction driven gear is provided at the rear end of a front drive shaft inserted in the counter shaft. The transfer drive gear and the reduction driven gear are engaged with a transfer driven gear which is integrally formed with an intermediate output shaft and a reduction drive gear. The rear end side of the intermediate output shaft is coupled with the front end side of a rear drive shaft through a torque coupling device, so that an FF based on the four-wheel drive vehicle can be formed.
Claims13
A transmission device of a four-wheel drive vehicle, comprising:
- an input shaft connected to an engine for transmitting a driving force;
- a hollow counter shaft extended in parallel to said input shaft;
- shift gear trains provided between said input shaft and said hollow counter shaft;
- a first output shaft disposed in a hollow portion of said counter shaft for transmitting the driving force to a final reduction gear of one of front and rear wheels;
- a first drive gear disposed at an end portion of said counter shaft;
- a first driven gear engaging with said first drive gear and rotating about a rotating axis of said input shaft;
- a second drive gear rotated integrally with the first driven gear about the rotating axis of said input shaft;
- a second driven gear disposed at a base end side of the first output shaft and engaging with said second drive gear;
- and
- a second output shaft coupled with said second drive gear through a variable mechanism to transmit the driving force to a final reduction gear of the other one of the front and rear wheels.
A manual transmission device mounted on a four wheel drive vehicle and housed in a transmission case, having an input shaft connected to an engine for transmitting a driving force thereof to either one of final reduction gears via front and rear output shafts, said device comprising:
- a hollow counter shaft provided under said input shaft in parallel with thereof for transmitting said driving force;
- a shift gear train provided between said input shaft and said hollow counter shaft for changing a relative speed therebetween;
- a first output shaft mechanically and rotatably inserted in said hollow counter shaft for transmitting said driving force to either one of said final reduction gears;
- a first drive gear fixedly provided at an end portion of said counter shaft;
- a first driven gear approximately coaxially provided behind said input shaft for engaging said first drive gear, a rotating axis of said hollow counter shaft being displaced from said input shaft;
- a second drive gear integrally formed with said first driven gear;
- a second driven gear coaxially provided at a base end portion of said first output shaft for meshing with said second drive gear;
- torque transmitting capacity variable means provided at a rear side of said second drive gear for changing a transmitting rate of said driving force between said formal reduction gear and said input shaft;
- and
- a second output shaft coupled with said second drive gear for transmitting said driving force to said final reduction gear so as to effectively improve a fuel consumption economy by decreasing a stirring resistance force of a lubricating oil contained in said transmission case by raising a level of said lubricating oil therein while in operation and to largely shorten a developing period by using common parts of other various kinds of transfer mechanisms.
Dependencies are inferred from the claim text.