摘要:
A drive gear and guide arrangement for a mining machine such as a disk shearer which operates above a chain scraper conveyor. The guide arrangement includes a guide rail arranged on a trough section of the chain scraper conveyor and extends along side of the chain scraper conveyor forming a chain duct for a drive gear chain which moves the mining machine along the conveyor. The guide rail includes a profile lug which engages over the horizontal chain links of the drive gear chain and holds the chain links on a chain support in the chain duct. The guide rails also includes a rolled profile which forms a sealing strip that closes off the chain duct of the drive gear chain on the side of the conveyor. The chain duct includes opening on the storing side which are designed to discharge fine materials which enter the trough section.
摘要:
A cutter bit assembly comprises a holder and a cutter bit. The holder is formed with a pocket into which the cutter bit can be inserted. The cutter bit is retained within the pocket by means of an arcuate wedge inserted into a tapered gap formed between respective curved support faces formed on the cutter bit and the holder.
摘要:
A cutter bit assembly for a mining or tunnelling machine has a cutter shank detachably fitted into a socket of a holder. To secure the shank in position a piston is displaced to cause pressure fluid to flow into a working chamber and act on a piston at one end of a rod-like securing element. The element is forced against a surface of the shank to urge the shank about a pivot and this in turn thrusts rear support surfaces of the cutter and the holder together. To release the cutter the pressure fluid is relieved and spring force displaces the securing element away from the shank. In this released condition, the cutter can be swivelled about the pivot and withdrawn from the socket.
摘要:
A cutter-bit assembly employs an arcuate wedge 16 to secure a cutter-bit 2 within a pocket 4 of a holder 1. An additional deformable insert or resilient backing piece 18 is also located in an arcuate gap between the cutter-bit shank and a curved surface of the holder. The insert or backing piece co-operates with teeth 19 to lock the wedge in position.
摘要:
A mineral mining machine guide is composed of individual sections joined end-to-end alongside the pans of a scraper-chain conveyor. Each guide section has a side wall component and a web plate component with spacers therebetween dividing upper and lower chain guide passages. An inclined foot plate component projects beneath the web plate component which is itself spaced above the foot plate component to form a slot through which the machine engages with the chain run in the lower passage. A pivotable cover closes the upper passage. Toggle-like coupling pieces fit into pockets in the ends of the web plate components of adjacent sections. Compartments in the web plate components above the pockets and at the level of the upper passage receive extensions of the covers which are hinged in these compartments. The coupling pieces are held in place with detachable locking plates which additionally co-operate with the covers to limit their outward pivotal movement.
摘要:
A coal plough has an elongate plough body which is provided with cutters at each end. The plough body is supported at each of its two ends, by a flat narrow skid on a plate of a plough guide. The skids constitute wear-resistant members and are connected to the plough body in a readily replaceable manner. The skids are so shaped that they guide the plough in the lower zone of the plough guide, and establish connection between the plough and the plough drive chain.
摘要:
A cutter bit assembly comprises a holder and a cutter bit. The holder is formed with a pocket into which the cutter bit can be inserted. The cutter bit is retained within the pocket by means of an arcuate wedge inserted into a tapered gap formed between respective curved support faces formed on the cutter bit and the holder.
摘要:
A mineral mining installation has a longwall conveyor provided with a guide at the face-side thereof. A drive frame is provided at each end of the conveyor, and a plough is movable along the guide to win material from the longwall face. The plough is driven by a chain passing round a pair of end sprockets associated with the drive frames. The plough is constituted by a pair of plough bodies joined together by an intermediate member pivotally connected therebetween. Each of the plough bodies is provided with cutter bits and the intermediate member may also have cutter bits. The two ends of the plough driving chain are connected to the intermediate member, and the plough is of sufficient length to enable material to be won at least as far as each end sprocket.
摘要:
The pans of a scraper-chain conveyor are interconnected with a dog-bone type connector which fits into laterally open shaped pockets in the side walls of the pans. A projection on one of the ends of the connector engages in a recess closed off from the side access while a projection at the opposite end of the connector is locked in place with a swivelled-in locking plate. The plate fits into compartments in the side wall of the associated pan. The plate carries a resilient pin at one end which fits into recesses in one of the compartments while the opposite end of the plate has a tongue which snaps into a recess in the base of the opposite compartment.
摘要:
The pans of a scraper-chain conveyor have a plough guide at one side. The pans are connected together at said one side with the aid of coupling pieces engaged in pockets in the side walls of the pans. Each coupling piece is pivotably fitted to a plate-like securing element which serves as a handle to enable the coupling piece to be inserted into or removed from the pockets. The securing element can be swung down into further pockets formed in the plough guide to lock the coupling piece in place.