146S01 / 020101 derailleur, suitable for Zhangjiakou coal machine, SGZ76 / 500 type comprehensive mining scraper conveyor . The derailleur, also called the chain splitter, and the shaft guard plate (chain guard plate, guard plate), fixed frame (frame body, small frame), etc. are commonly used wearing parts of the scraper conveyor.

When installing the derailleur, the fork is inserted into the groove of the sprocket teeth, so that the chain of the scraper chain and the sprocket can be smoothly engaged and separated. The function of the derailleur is: when the sprocket shaft group is disengaged from the meshed ring chain, the chain ring is prevented from being caught in the groove of the sprocket and cannot be disconnected at the normal separation point.