Abstract: A chain drum for a chain conveyor, in particular a chain flight conveyor mounted on the cutting jib of a cutter-loader, consists of a split sprocket removably mounted on a non-divided drum which is connected to and rotates together with its shaft. The drum is provided with external teeth which mesh with internal teeth on both sprocket halves. Both sprocket halves are held together by locking disks which extend over shoulders on the sprocket halves, which latter are fixed to the drum by means of circlips or the like.BACKGROUND OF THE INVENTIONCutter-loaders of various designs are known for excavating tunnels, adits and so on, as well as for mining minerals such as clay. A cutter-loader may be provided with a swinging cutter jib, on the free end of which is mounted a rotary cutting drum or the like. The jib may also have a conveyor onto which the broken rock excavated at the face by the cutter drum is loaded in order for it to be carried to the next transporter.

Abstract: Conveying apparatus which may be embodied as a jib for a cutter-loader machine in tunnelling or mining applications. The apparatus employs a scraper-chain assembly which in known manner is entrained around rotatable members and is circulated within guide channels with side surfaces adjoined by a base or floor surface. An electric drive motor is coupled via reduction-ratio gearing unit to one or other of the rotatable members. The motor and the gearing each have housings joined together end-to-end and the housing of the motor is joined to at least one other body section of the apparatus. The housings and this body section have the same cross-sectional profile defining the aforesaid guide channels.