| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-stage transmission capable of changing gear in the number larger than the number of gear train. SOLUTION: In this multi-stage transmission, driving gears G1a-G4a of a plurality of gear trains respectively having a different gear ratio are fixed to an input shaft 2. This multi-stage transmission includes: a first intermediate shaft 4<SB>1</SB>pivotally supporting driven gears G1b and G3b of each odd-numbered gear train in order of gear ratio; a second intermediate shaft 4<SB>2</SB>pivotally supporting driven gears G2b and G4b of each even-numbered gear train in order of gear ratio; synchronizing devices 5<SB>1</SB>and 5<SB>2</SB>selectively connecting the driven gear on each intermediate shaft to each intermediate shaft; a differential device 6 structured so that a third rotating element 6b is rotated at an intermediate speed of a first rotating element 6e and a second rotating element 6a when the first rotating element 6e and the second rotating element 6a are rotated at a different speed; and a friction engagement element 8 connecting two rotating elements of the three rotating elements of the differential device 6. The first intermediate shaft 4<SB>1</SB>and the second intermediate shaft 4<SB>2</SB>are connected to the first rotating element 6e and the second rotating element 6a, and the third rotating element 6b is connected to an output member 3. COPYRIGHT: (C)2010,JPO&INPIT
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