AutoCAD making three-dimensional bicycle wheel

Look at the effect chart first!

First with the line L, arc arcs and other commands roughly draw the following figure shape!

Pedit edited into multiple lines (when rotated into an entity, it must be a closed line)! The command prompt is as follows:

Continue to use ARC arcs and other commands to draw the bicycle tires! As pictured!

On the tire top painted a few small arcs, oh, to improve the simulation of a little!! As pictured, after painting, edit again into multiple disconnection pedit!

Rims and tires are roughly done, now do the central axis!

As shown in the drawing of the central axis of the rotation of the two-dimensional diagram, the rotation axis of red center line!

Use Pedit again to edit it into multiple lines!

Click on the Layer feature manager, pop up the following figure window, create a new two layers, the name is shown in the following figure!

Put the wire layer into the head layer, such as drawing and line!

Use three-dimensional rotating rotate3d to rotate the newly-painted circle 90 to the straight line!