Bearing end cover structure, function and measure Stereogram)

Typical bearing end cover: bearing end cover of stereogram here belongs to the typical parts of wheel type, the parts is reducer bearing end cover, because it can connect, so also known as the basic form of transparent cover bearing end cover parts as coaxial of rotors, the structure can be divided into cylindrical tube and disc two parts, the axial size is smaller than the radial size. Have a tapered hole in the cylinder ( Cavity) No gap, edge, bearing grease is; Cylindrical Jane's outer cylinder is to match the bearing hole. With six cylinder sink holes on the disk, evenly distributed along the circumference, is used to load threaded fasteners, connecting bearing cover and body, so also called mounting holes. Round hole in the center of the disk with seal groove used to install felt seal and prevent the casing leakage of lubricating oil and kraf debris into the casing. Bearing end cover drawing 2, the action of bearing end cover: the vast majority of medium and small gear reducer adopts rolling bearing, and bearing end cover is the most common parts of rolling bearings, bearing end cover to fixed bearing, adjust bearing clearance and axial force. Three, the structure characteristics of bearing end cover: the structure of bearing end cover are embedded and flange type two kinds, each have a blank cap and transparent cover again, 1, embedded bearing end cover simple and compact structure, no fixed screw. Small diameter, light weight, and the secondary axis short. But end cover installation and adjust bearing clearance is difficult, sealed performance is poor. A hole on the slot, the processing time. Embedded bearing end cover is used for light weight, compact structure, its structure and dimensions are shown in table 1. Table 1 embedded bearing end cover structure size 2, flange bearing end cover installation, remove and adjust bearing clearance is more convenient and the sealing performance. So widely used. But the disadvantage is that outer profile size is large, and need to join a group of screw. The structure and size are shown in table 2. Table 2 structure size of flange type bearing end cover note: when the end cover a longer cooperate with hole, in order to reduce the contact surface, in department of casting a smaller diameter or car, but you must keep enough length e1. The length of e1 = the general here ( 0. 10 - 0. 15) For bearing outside diameter, D, D diagram of end face concave. The delta value, but also to reduce the machining surface. As shown in figure 3. Figure 3 bearing end cover end chart 4 wearing thong-style bearing end cover due to the end cover is multi-purpose cast iron casting. So it is very good considering casting process. For example in the design of wearing thong-style bearing end cover figure 4, seal need a larger cover thickness (the device Figure 4 a) Should be considered when casting process, make the whole end cover thickness, such as cabinet 4 b) 、c) Is shown in a good structure. Four, bearing end cover measurement method and the method for measuring size of the common parts there are three kinds of circumstances, as shown below: ( 1) Common measuring tool measuring size are: steel ruler, outside calipers and caliper ( Can be used) As shown in figure 5 is shown in figure 5 steel ruler and internal and external calipers with outside calipers and steel rod support the use of measuring diameter is shown in figure 6: figure 6 feet outside calipers and steel sheets used in internal and external calipers measuring inside diameter, pitch, as shown in figure 7: in figure 7, outside calipers measuring inside diameter, pitch, 2) If the size of the measurement more accurate, use vernier caliper, as shown in figure 8 measurement method of the bearing end cover and dimensions as shown in figure 9 figure 9 measurement methods and the size of bearing end cover ( 3) Such as measuring the outer size of the various artifacts, available outside micrometer, as shown in figure 10 figure 10 outside micrometer and measured with round Angle gauge round five, bearing end cover size shall idea items (1) to select the correct use of measuring tools and measuring benchmark, seems to reduce the measurement error; Don't rough surface is measured with a precision measuring tool, in order to avoid wear and tear, influence the accuracy of the measuring tool. Numerical size must concentration measurement, one by one to fill in size. (2) for critical dimensions, some by calculation, such as center distance, high center, the gear tooth size, etc. , to accurately measure, and necessary calculation, check, shall not be adjusted freely. For the size of the less important on parts ( No machining surface size, surface, general size) The size of the measured value can be rounded to an integer. (3) to measure parts has wear and tear parts of the size, the wear value should be considered, with reference to relevant parts or related materials, determined by way of analysis. (4) parts have standardized structure size, such as putting felt ring oil seal of the seal groove chamfer, fillet, slotting, thread relief groove, such as structure size, can consult relevant criteria. 5 parts to match the standard parts, such as rolling bearing on the size of the shaft or hole, can be determined by the model of standard parts look-up table. After standard structural elements, the size of the measured, should take standard look-up table.