The invention relates to a multi-speed transmission on a central axis (6a), comprising a drive-side hollow shaft (4a) and an output-side hub sleeve (1) and two, at least two-stage, planetary gearboxes(EG, NSG), arranged coaxially therebetween or therein, each gearbox having sun gears, planetary gears which are connected to one another via associated frames, and ring gears, and each can be shiftedinto a direct drive and into a plurality of stepped conversion modes, wherein the first planetary gearbox (EG) is driven on its frame (8) and can be selectively shifted, by means of three clutches (20, 30, 40), into the direct drive or by axially fixing individual sun gears (9c,9d) into said transmission modes, and the second planetary gearbox (NSG) can be shifted by further clutches (50, 60, 70,80, 90) by means of an axial fixing of the sun gear (204) when the input drive and output drive are shifted between its ring gear (200) or frame (202) into a conversion mode at a low speed and into aconversion mode at high speed and directly into a gear. By means of an axially displaceable control slide, spring-loaded, radially extending coupling rings (e.g 91a, 91b) of a respective gear stage can be released, such that the control slide is guided in helical circular grooves (24..... 94) of a coaxial switching drum (6b) and in radial slots that are oriented parallel to the gear axis of a hollow axle (6a) enclosing them, respectively actuating the associated coupling rings.

本发明涉及一种中心轴(6a)上的多挡变速器，其包括：驱动侧的空心轴(4a)和输出侧的轮毂套筒(1)以及同轴地布置在它们之间或其中的两个至少两级的行星齿轮箱(EG，NSG)，该齿轮箱分别具有太阳轮、经由相关联的桥接件相互连接的行星齿轮和齿圈，该齿轮箱分别可以切换为直接驱动以及切换为多级转换模式，其中，第一行星齿轮箱(EG)在其桥接件(8)上被驱动并且可以借助于三个离合器(20，30，40)选择地切换为直接驱动或通过轴向固定各个太阳轮(9c，9d)选择地切换为传动模式，并且当输入驱动和输出驱动在其齿圈(200)或桥接件(202)之间切换为低速转换模式、高速转换模式以及直接切换为齿轮时，第二行星齿轮箱(NSG)可以通过另外的离合器(50，60，70，80，90)借助于太阳轮(204)的轴向固定进行切换。借助于轴向可移动的控制滑块，负载的弹簧、各个齿轮级的径向延伸的联接环(例如，91a，91b)可以脱离，使得在同轴转换鼓(6b)的螺旋圆形凹槽(24…94)和被定向为与围绕它们的空心轴(6a)的齿轮轴线平行的径向槽中引导控制滑块，控制滑块分别致动相关联的联接环。