| 摘要 |
A spur-gear planetary gearbox with multiple ratios comprises a spur-gear gearbox (1) with at least one first idler gear (1.1) arranged concentrically to a spur-gear shaft (AN), and a spur gear (1.2) connected to this spur-gear shaft, a planetary gear train (2) with at least a first planetary gear set (2a) and a second planetary gear set (2b) and a planetary gear train shaft (AB) rotatable about a planetary gear train axis, wherein at least one of the planetary gear sets (2a, 2b) is arranged concentrically to the planetary gear train axis, a first planetary gear (2.1) and a second planetary gear (2.2) arranged concentrically to the planetary gear train axis, a gear box (3) and a plurality of speed changing devices (1.SE to 7.SE), wherein the first idler gear (1.1) meshes with the first planetary gear (2.1), the spur gear (1.2) meshes with the second planetary gear (2.2), the planetary gearbox being characterised in that a second idler gear (1.3) is arranged on the spur-gear shaft (AN) and can be selectively connected thereto in a torque-transmitting manner, in that the first idler gear (1.1) can be selectively connected to the gear box in a torque-transmitting manner, and in that a third planetary gear (2.3) is arranged concentrically to the planetary gear train axis and meshes with the second idler gear (1.3). |
