| 摘要 |
A continuously variable transmission wherein drive force from a drive source (E) is transmitted along a path from an input shaft (13) → a first input switching mechanism (24A) → a first reduction gear (25) → a second reduction gear (26) → a first secondary input shaft (13A) → a first pulley (21) → an endless belt (23) → a second pulley (22) → a second secondary input shaft (13B) → a third reduction gear (39) → a fourth reduction gear (40) → a first output switching mechanism (37) → a fifth reduction gear (29) → a sixth reduction gear (30) → an output shaft (15), thereby establishing a low mode. In the low mode the transmitted large torque passes through the first output switching mechanism (37), but a secondary shaft (14) is arranged at the outer circumference of the input shaft (13) so as to be capable of relative rotation, and the first output switching mechanism (37) is arranged on the secondary shaft (14), so the secondary shaft (14) transmitting the large torque is arranged on the outer-circumferential side of a dual-shaft structure and is supported directly by the transmission case, and the input shaft (13) transmitting the comparatively small torque is supported via the secondary shaft (14), thereby enabling the first output switching mechanism (37) to be supported with high rigidity without implementing special strengthening. |
