| 摘要 |
A transmission TM 1 according to the present invention comprises a main shaft 3, a first countershaft 4, which is disposed in parallel with the main shaft 3, a second countershaft 5, which is disposed rotatably over the first countershaft 4, a third countershaft 6, which is disposed coaxially with the first and second countershafts 4 and 5, first~third gear trains G 1~ G 3 and a reverse gear train GR, which are disposed rotationally between these parallel shafts, and a planetary gear train PG, whose carrier C is connected to the first countershaft 4, whose sun gear S is connected to the second countershaft 5, and whose ring gear R is connected to the third countershaft 6, respectively at their rotational axes. Furthermore, the first transmission TM 1 comprises first~fourth clutches C 1~ C 3 and CR, which connect or disconnect the first~third gear trains G 1 ~G 3 and the reverse gear train GR to or from the main shaft 3 and the first and second countershafts 4 and 5, and it also comprises a fifth clutch CP, which connects the carrier C and the sun gear S or disconnects them from each other, and a brake B, which holds the sun gear S stationary, the transmission realizing seven forward speed ranges and a reverse range.
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