Spur-Gear Planetary Gearbox with Multiple Ratios

A spur-gear planetary gearbox with multiple ratios has a spur-gear gearbox with at least one first idler gear arranged concentrically to a spur-gear shaft, and a spur gear connected to this spur-gear shaft, a planetary gear mechanism with a first planetary gear set and a second planetary gear set and a planetary gear shaft rotatable about a planetary gear mechanism axis. One of the planetary gear sets is arranged concentrically to the planetary gear mechanism axis. A first planetary gear and a second planetary gear arranged concentrically to the planetary gear mechanism axis. A gear box and a plurality of speed changing devices are provided, wherein the first idler gear meshes with the first planetary gear, and the spur gear meshes with the second planetary gear. The planetary gearbox is characterized in that a second idler gear is arranged on the spur-gear shaft and can be selectively connected thereto in a torque-transmitting manner. The first idler gear can be selectively connected to the gear box in a torque-transmitting manner, and a third planetary gear is arranged concentrically to the planetary gear train axis and meshes with the second idler gear.