Structural features speed reducer

    Speed Reducer mainly by the transmission parts (gears or worm), shafts, bearings, housing and accessories formed. Its basic structure has three parts:
1, gear, shaft and bearing assembly
     The pinion is formed integrally with the shaft, said gear shaft, this structure is used for the shaft diameter of the gear is not the case related to the diameter, if the shaft diameter is d, the diameter of the gear tooth root circle is df, when df- d ≤ 6 ~ 7mn should adopt this structure. When df-d> 6 ~ 7mn, the use of the gear and shaft is separated into two parts of the structure, such as the low-speed shaft with the large gear. At this point the circumferential gear fixed to the shaft parallel key connection, shaft parts using the shaft shoulder, sleeve, and bearing cap axially fixed. Two axes are deep groove ball bearings. This combination is not used to bear radial load and Reducer
Large axial load situation. When the axial load is large, you should use angular contact ball bearings, tapered roller bearings or deep groove ball bearing and thrust bearing assembly structure. Bearing is the use of gear rotates splashes of thin oil lubrication. Lubricating base oil pool box, the gear being rotated splashes splashing into the inner wall of the cover, flows along the inner wall of the box side bevel, through the guide groove of a bearing. When the oil-soaked gear circumferential velocity υ ≤ 2m / s should be used grease lubricated bearings, in order to avoid possible splashes of thin oil wash away grease, can be used to separate the slinger. To prevent dust from entering the oil drain and outside the box, on the bearing cap and shaft extension is installed between the sealing element.
2, Box
Reducer housing is a key component. It is the base transmission parts, should have sufficient strength and rigidity.
Usually with a gray cast iron housing, for heavy or shock loads reducer steel box can also be used. Reducer monomer production, in order to simplify the process, reduce costs, can be welded steel box.
Grey cast iron has good performance and damping properties. In order to facilitate installation and removal of shaft parts, box made of split along the horizontal axis line. Box with the lid and the lower bolt into one. Bearing bolts should be as close to the bearing hole, while bearing boss next, should have sufficient supporting surface in order to place the bolts and tighten the bolts needed to ensure the wrench space. In order to ensure sufficient rigidity housing, near the holes in the bearing support ribs added. To ensure that the gear unit disposed on the foundation box stability and to minimize the area of ​​the base plane of the machining, the base housing is generally not used a completely flat.
3, Reducer attachments
In order to ensure the normal operation of the gear unit, in addition to gears, shafts, bearings and cabinet combination of structural design given enough attention, we must also take into account the reduction gear lubricating oil sump oiling, oil discharge, check the oil level, processing and removable lid and the box seat when maintenance precise positioning, lifting and other auxiliary parts and components reasonable choice and design.
  Reducer
1) Check the hole to check the gear meshing parts, and to inject lubricant inside, you should set the appropriate position in the box inspection hole. Inspection hole provided in the top of the lid can be directly observed at the gear engaging portion. Normally, the inspection hole cover plate with screws on the cover.
2) breather reducer work, cabinets temperature, gas expands, the pressure increases, in order to free air thermal expansion tank is discharged, in order to maintain pressure balance inside and outside the box, does not result in oil along the surface or shaft binning Seal cracks and other leaks, usually installed in the box at the top of the breather.
3) bearing cap is a fixed component of the axial position of the shaft and axial load, the bearing hole closed at both ends of the bearing cap. Bearing cap with flange and embedded two kinds. Using the hex bolt in the box, shaft extension at the bearing cap is through-hole, which is equipped with sealing devices. The advantage of flanged bearing cover is removable, easy to adjust the bearing, the bearing cap and embedded compared to a larger number of parts, large size, appearance is not smooth.
4) To ensure that each pin removable lid, still keeping the bearing hole machining precision manufacturing should be finished before the bearing hole in the lid and the box seat fitted on the coupling flange locating pin. Placed in the box on the longitudinal sides of the flange connection, symmetrically arranged symmetrically cabinet should avoid the wrong equipment.
5) Check the gearbox oil level indicator within the height of the oil sump, and keep an appropriate amount of the oil sump, generally easy to observe in the box, the more stable parts of the oil, the oil surface indicator installation.
6) when the oil drain plug, oil pollution emissions and cleaning agents should be in the box seat at the bottom of the oil tank at the lowest position open drain hole, usually with plug to block the drain hole, drain plug and Cabinet should be added between the leakproof joints with gaskets.
7) Kai box screws to strengthen the sealing effect, usually in the assembly in the housing subdivision surface coated with sodium silicate or sealant, which often result in the demolition difficult lid tightly cemented. To do this often in the cover flange coupling the appropriate location, processed ~ 2 screw, screwed into the open end of the cylindrical tank with a flat end or start box screws. Turn the start box could be on the cover screws from the top. Reducer or not to set a small box screws Kai Kai cover lid with a screwdriver pry Kai box screw size can be the same as the flange bolts.
 Hangzhou chinabase is theSpeed Reducer components supplier, any need visit their site:http://www.speedreducer.org/