The reducer is mainly composed of transmission parts (gear or worm), shaft, bearing, case and its accessories. Its basic structure has three major parts: 1, gear, shaft and bearing combination The pinion is integrated with the shaft and is called a gear shaft. If the diameter of the gear is not related to the diameter of the shaft, if the diameter of the shaft is d and the diameter of the root of the gear is df, then df- This structure should be adopted when d ≤ 6 to 7 mn. When df-d>6～7mn, the structure in which the gear and the shaft are separated into two parts, such as a low speed shaft and a large gear, is adopted. At this time, the gear is fixedly connected with the circumferential direction of the shaft, and the shaft parts are axially fixed by the shoulder, the sleeve and the bearing cover. Deep groove ball bearings are used on both axes. This combination is used to withstand radial loads and small axial loads. When the axial load is large, an angular contact ball bearing, a tapered roller bearing or a combination of a deep groove ball bearing and a thrust bearing should be used. The bearing is lubricated by the thin oil splashed when the gear rotates. The lubricating oil in the oil pool in the tank seat is splashed by the rotating gear to the inner wall of the tank cover, flows along the inner wall to the groove of the binning surface, and flows into the bearing through the oil guiding groove. When the circumferential speed of the oil-impregnated gear υ ≤ 2m / s, the bearing should be lubricated with grease. To avoid the grease that may be splashed, the grease can be used to separate the grease. In order to prevent the loss of lubricating oil and foreign dust entering the tank, a sealing element is installed between the bearing end cover and the overhanging shaft. 2, the box The cabinet is an important component of the reducer. It is the base of the transmission parts and should have sufficient strength and rigidity. The cabinet is usually made of grey cast iron, and cast steel tanks can also be used for heavy-duty or shock-damped gear units. In order to simplify the process and reduce the cost of the reducer produced by the single unit, a steel plate welded box can be used. Gray cast iron has good casting properties and vibration damping properties. In order to facilitate the installation and disassembly of the shafting components, the casing is made horizontally split along the axis of the shaft. The upper cover and the lower case are integrally connected by bolts. The coupling bolts of the bearing housing should be as close as possible to the bearing housing bore, and the bosses next to the bearing housing should have sufficient bearing surfaces to place the coupling bolts and ensure the wrench space required to tighten the bolts. To ensure that the box has sufficient rigidity, support ribs are added near the bearing holes. In order to ensure the stability of the reducer on the foundation and to minimize the machining area of ​​the plane of the base of the box, the base of the box generally does not use a complete plane. 3, reducer accessories In order to ensure the normal operation of the reducer, in addition to paying sufficient attention to the structural design of the gears, shafts, bearing combinations and cabinets, it should also consider filling, draining, checking the oil level, processing and Reasonable selection and design of auxiliary parts and components such as precise positioning and lifting of the cover and the box seat during disassembly and assembly. 1) Check the hole to check the meshing condition of the transmission parts and inject the lubricating oil into the box. The inspection hole should be set at the appropriate position of the box. The inspection hole is placed at the top of the upper cover to directly observe the gear engagement position. In normal times, the cover of the inspection hole is screwed to the cover. 2) When the ventilator reducer is working, the temperature inside the box rises, the gas expands, and the pressure increases, so that the air in the box can be freely discharged, so as to maintain the pressure balance inside and outside the box, so that the lubricating oil does not extend along the bin surface or the shaft. Other gaps such as seals leak, and a ventilator is usually installed at the top of the box. 3) The bearing cap is the axial position of the fixed shafting component and is subjected to the axial load, and both ends of the bearing housing bore are closed by the bearing cap. The bearing caps are flanged and recessed. The hexagonal bolt is fixed on the box body, and the bearing cover at the outrigger shaft is a through hole, and a sealing device is installed therein. The advantage of the flanged bearing cap is that it is convenient to disassemble and adjust the bearing, but compared with the embedded bearing cap, the number of parts is large, the size is large, and the appearance is not flat. 4) The positioning pin is to ensure the accuracy of the manufacturing and processing of the bearing housing hole when disassembling the cover. The positioning pin should be installed on the coupling flange of the cover and the box seat before finishing the bearing hole. It is placed on the coupling flanges on both sides of the longitudinal direction of the box, and the symmetric box should be arranged symmetrically to avoid misassembly. 5) Oil level indicator Check the height of the oil level in the oil tank of the reducer, and always keep an appropriate amount of oil in the oil pool. Generally, the oil level indicator is installed in the part where the tank is easy to observe and the oil surface is stable. 6) When the oil drain plug is changed, the oil and cleaning agent should be drained at the bottom of the box seat, and the oil drain hole should be opened at the lowest position of the oil pool. Usually, the oil drain hole is blocked by the screw plug, and the oil plug and the oil plug are plugged. A gasket for leak prevention should be added between the joint surfaces of the cabinet. 7) The box-opening screw is used to enhance the sealing effect. Usually, the water-glass or sealant is applied to the split surface of the box during assembly. Therefore, it is often difficult to open the cover due to the cementation when disassembling. For this purpose, at the appropriate position of the joint flange of the tank cover, ～2 screw holes are machined, and the cylindrical end or the flat end box screw for the starter box is screwed. The upper cover can be lifted by turning the starter screw. The small reducer can also be used without the starter screw. When opening the cover, use a screwdriver to open the cover. The size of the open box screw can be the same as the flange connection bolt. The garden cacuum cleaner is a portable appliance for bloweing and vacuuming. It is capable of vacuuming leaves and similar light materials which are deposited in a collection bag. Cheap Vacuum cleaner,Vacuum Cleaner Mini,Vacuum Cleaner Robot,Cylinder vacuum cleaner AWLOP CO.,LTD , https://www.awlop.com