| 摘要 |
The speed changing device comprises a fixed casing, a first gear wheel connected to the casing, a first shaft supported on bearings and freely rotatable relative to the casing, a rigid body freely rotatably and mounted on at least one bearing on the first shaft, this bearing having its axis arranged at an angle relative to the axis of the first shaft, two ring gears carried by the rigid body and separate from each other, a second shaft coaxial with the first shaft and also mounted on bearings and which is freely rotatable relative to the casing and carrying a second gear wheel. One of the two ring gear meshes with the first gear wheel and the other ring gear with the second gear wheel the teeth of all the gear wheels and ring gears having conical pitch surfaces with apices coinciding with one another and lying on the axis of the two shafts. |
