| 摘要 |
The invention relates to a compact multiple-ratio transmission device. According to the invention, three planetary gearsets (TP1, TP2, TP3) use selective coupling means (B1, B2, B3, BR, C4, C5, C6) each to supply a local direct drive and at least one other transmission ratio. Said planetary gearsets belong to three different power paths (8a, 8b and 8c) between an upstream rotary member (2) and a downstream rotary member (4). Upstream gear transfer elements (TR1, TR2) are operably mounted between the upstream rotary member (2) and two "downstream" planetary gearsets (TP1, TP2). A downstream gear transfer element (TR3) is operably mounted between the third "upstream" planetary gearset (TP3) and the downstream rotary member (4). The upstream planetary gearset (TP3) is mounted about the axis (A2) of the upstream rotary member (2). The invention relates to the use of same to produce a compact, economical transmission with good overall performance and good ratio shifting, enabling ratio shifting without interrupting the power transmission. |
