the fork/sleeve connection is not physically possible/buildable as you drew it, with a pass-trhough rod. How is the real connection of such device shaped?
The fork is a "C" shaped structure, there is no rod in between the two arms of the fork. The round end of the fork arm just slides in the groove of the sleeve. This is roughly 150 year old mechanism. Watt governor is the first centrifugal governor introduced for automatic speed control of steam engines. You can watch other types of governor animations in my channel to better understand the fork sleeve mechanism. Even in the forks of other types there is no rod passing through the sleeve. Fork pins are short enough to fit inside the groove on the sleeve on both sides.
To better understand fork sleeve connection and sliding operation watch this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-zbM7wTnLgIE.html The shifting lever mechanism in the given gear box video and the fork sleeve mechanism are similar in construction and operation.
