The 78 / 05LL type sprocket assembly is a part of the head transmission part of the SGZ830 / 630 type scraper conveyor. The total length of the sprocket shaft group is 1135mm, the outer diameter of the sprocket is 590mm, and the sprocket is 8 teeth. Specification C chain.

    The sprocket shaft group, also called sprocket assembly, is suitable for scraper conveyors for underground coal mines and scraper transfer machines for flutes.

　　According to the use position, it can be divided into: machine head sprocket shaft group and machine tail sprocket shaft group.

　　According to the supporting main engine factory, it can be divided into: Zhangjiakou coal machine sprocket shaft group, Shandong mining machine sprocket shaft group, northwest Benniu sprocket shaft group, Shanxi coal machine factory sprocket shaft group, Zheng coal machine sprocket shaft group, Huainan long wall sprocket shaft group , Linzhou Heavy Machinery sprocket shaft group, Sany Heavy Industry sprocket shaft group, etc.

　　According to applicable models, it can be divided into: 630, 730, 764, 800, 830, 900, 1000, 1200, 1250, 1400 and other models.

　　The sprocket assembly is mounted on the head frame and tail frame of the head drive section, and is mainly composed of an end cover, a bearing seat, a sprocket body, a shaft, a floating seal ring assembly, a rolling bearing and a roller, etc. The sprocket is a forged seven-tooth sprocket made of alloy steel, processed and formed by the machining center, and the tooth surface is quenched. After the sprocket assembly has been running for 6 months, it is installed after being turned 180 °, so that both sides of the sprocket teeth are evenly worn.