【正文】 and fully mechanized coal face of high yield and high efficiency operations. Scraper conveyor is a reprint of a special structure of the scraper conveyor, powertrain and drive and scraper conveyor similar to a ramp of its fuselage and a section of the arch bridge structure and belt conveyors in the tail Paragraph above lap. In the backalley in the coal face when the machine goes to reprint its arch bridge and all of the aircraft ended the lap belt conveyor stack of position limits, a retractable belt conveyor shortened ride Next length of the belt conveyor for the development of the shift to homeunloading nose reproduced below, can be reproduced with the face of the advance goes forward. Reproduced largescale machine is fully coal face with the equipment supporting the use of the Gate transmission, reproduced equipment, to plete the face conveyor sent to the coal transportation, transit facilities to follow up on the conveyor belt of tasks and to provide the appropriate means of connection. ZY2300 belt with the design requirements for supporting the tail since the shift to achieve in the metres of the overall mobile rather than demolished shift belt machine. ZY2300 belt and the tail of the shift can be more easily cope with beltregulation, enhance the beltandreproduced with the coordination. This reprint of MG300/700WD and supporting the use of conveyor, capacity up to 1,000 tons / hour, technologically advanced, reliable, largescale prehensive mining equipment supporting the excellent models.Wheel gearsWheel gears spreading to move is a the most wide kind of the application spreads to move a form in the modern main advantage BE:The ① spreads to move to settle, work than in a moment steady, spread to move accurate credibility, can deliver space arbitrarily sport and the motive of the of two stalks；Power and speed scope ② applies are wide； ③ spreads to move an efficiency high, =；④ work is dependable, service life long；⑤ Outline size outside the is small, structure tightly wheel gear constituted to；；；from wheel gear, stalk, bearings and box body decelerates a machine, useding for prime mover and work machine or performance organization of, have already matched to turn soon and deliver a function of turning , the application is extremely extensive in the modern machine. Planetary gear reducer gear reducer than the normal small size, light weight, high efficiency and transmission power range, etc, widely applied gradually. At the same time its drawbacks are: material quality, plex, high precision manufacturing, more difficult to install, design plex calculations than the average speed reducer. but on the planet as people drive technology further indepth understanding and knowledge as well as the introduction of foreign planetary transmission and absorption of technology to drive the structure and contain its way are constantly improving, and continuously improve the level of production technology, can produce a better planetary gear reducer. According to a general load of gear strength, geometric dimensions of the design calculation, and then to carry out transmission ratio conditions, concentric condition, the assembly conditions, design and calculation of the adjacent conditions, thanks to the number of planetary gear transmission, also must be contained institutions and the design of floating volume calculation. Planetary gear drive according to the position of basic enough pieces can be divided into: 2KH, 3K, and KHV are three. If the meshing of gears by the way, can be divided into: NGWtype, NNbased, WWtype, WGW type, NGWN type and Ntype and so on. I designed planetary gear is 2KH NGW planetary transmission type.⑥ Local deceleration machine much with the wheel gear spread to move, the pole spread to move for lord, but widespread exist power and weight ratio small, or spread to move ratio big but the machine efficiency lead a low are also many weaknesses on material quality and craft level moreover, the especially large deceleration machines problem is more outstanding, the service life isnt deceleration machine of abroad, with Germany, Denmark and Japan be placed in to lead a position, occupying advantage in the material and the manufacturing craft specially, decelerating the machine work credibility like, service life it spreads to move a form to still take settling stalk wheel gear to spread to move as lord, physical volume and weight problem, dont also resolve likeThe direction which decelerates a machine to is the facing big power and spread to move ratio, small physical volume, high machine efficiency and service life to grow greatly nowadays the connecting of machine and electric motor body structure is also the form which expands strongly, and have already produced various structure forms and various products of power model close to ten several in the last yearses, control a technical development because of the modern calculator technique and the number, make the machine process accuracy, process an efficiency to raise consumedly, pushed a machine to spread the diversification of movable property article thus, the mold piece of the whole machine kit turns, standardizing, and shape design the art turn, making product more fine, the beauty turns.Bee a set a machine material in 21 centuries medium, the wheel gear is still a machine to spread a dynamic basic tool machine and the craft technical development, pushed a machine to spread to move structure to fly to develop spreading to move the electronics control, liquid in the system design to press to spread to move, wheel gear, take the mixture of chain to spread to move, will bee bee soon a box to design in excellent turn to spread to move a bination of academics that is in spread move the design crosses, will bee new spread a movable property article the important trend of the development.Essential character：Reduction gear、 Bearing 、gear 、mechanical drive刮板輸送機(jī)