ZLL type elastic column pin coupling with brake wheel is easy to maintain and has a long service life. Nylon column pin can be replaced after removing the baffle plate. It has the performance of compensating the relative deviation of two axes to a certain extent, and is suitable for medium and high power transmission. It is not suitable for the working parts with certain requirements on vibration reduction and noise control. Nylon pin coupling is self - wetting material, no need of lubrication, not only save lubricating oil, but also purify the working environment.