凸轮轴承也是轴承的一种，具有厚外圈滚针轴承与螺栓组合结构；轴承的螺栓内

Cam bearings are also a type of bearing, with a thick outer ring needle roller bearing and bolt combination structure; the bearing bolts are provided with lubricating oil channels; the outer surface of the outer ring has a cylindrical and spherical shape, which can be selected according to the actual application; eccentric type It is convenient to accurately adjust the position of the axis of the bolt when installing the bearing. It is generally used in automobile camshafts. The camshaft is a shaft that controls the opening and closing actions of the piston engine valve. <br><br>The structural characteristics of the cam bearing <br>1. The combined structure of the thick outer ring needle roller bearing and the bolt; <br><br>2. The sizes are in the metric series and the inch series; <br><br>3. The bolts of the bearing are provided with lubricating oil channels; <br><br>4. For easy installation, the large bearing The ends are designed with "one-word" and "hexagon hole" wrench assembly methods; <br><br>5. The outer surface of the outer ring has a cylindrical and spherical shape, which can be selected according to the actual application; <br><br>6. The full roller type is suitable for bearing large loads, When the rotation speed is low; <br><br>7. The eccentric type can easily and accurately adjust the axis position of the bolt when installing the bearing. <br><br>Click to see the picture to comment <br><br>on the maintenance method of the cam bearing <br>1. The newly-used cam rotor pump generally needs to be replaced with grease (oil) after 100 hours of operation, and it will be replaced every 500 hours of operation. <br><br>2. Flow bearings lubricated with grease. After 1500 hours of operation, the grease should be replaced. The amount of oil added should not be too much or too little, because too much or too little grease will cause bearing heating. The amount of oil is generally controlled at 2/1 ---- 2/3 of the volume of the bearing room is suitable. <br><br>3. For bearings lubricated with lubricating oil, the amount of oil should be added to the specified position. <br><br>4. The container holding lubricating oil or grease should be clean and should be sealed normally, and there should be no debris such as dust and iron filings, so as not to damage the bearing. <br><br>5. The motor bearing adopts Naji grease, which is characterized by high temperature resistance (125 ℃), but it is easily soluble in water, so it cannot be used for the lubrication of water pump bearings. <br><br>Overhaul of camshaft<br>1. Check the camshaft curvature. With the journals at both ends as the fulcrums, the radial runout should not be too large 0.03mm, when it exceeds 0.1Omm, it can be corrected by the cold pressure correction method. <br><br>2. When the lift of the cam is not less than 5% of the specified value, the cam is not allowed to be ground, but the radial circle runout tolerance of the cam base circle and the cam base circle to the camshaft axis should be checked; the overhaul standard is <br><br>0.03mm, overhaul Allow no more than O.05mm. <br><br>3. The surface of the cam should be rough, damaged or pitted. When the top of the cam wear exceeds 1.00mm, the top of the cam should be repaired after surfacing to restore the original size and shape, <br><br>or replace. <br><br>4. The oil pump driving gear on the camshaft should be repaired if the tooth surface is rough or the tooth surface wear exceeds 0.50mm. The individual teeth of the gear are damaged, and it is allowed to continue to use after grinding off the acute angle without affecting the use. The surface roughness of the eccentric wheel driving the oil pump should not exceed O.80μm. When the wear of the eccentric wheel exceeds 2.00mm, the camshaft should be repaired or replaced by welding. <br><br>5. Cylindricity tolerance of each journal of the camshaft: the overhaul standard is 5μm, the overhaul allows no more than 15μm, and the use limit is 25μm. <br><br>6. The radial circle runout tolerance of the journal of the camshaft mounted timing gear and the end face circle runout error of the axial thrust end face are not greater than 35 μm.

Cam bearings are also a type of bearing, with a thick outer ring roller bearing and bolt combination structure, bearing bolts are set with a lubricant channel, the outer surface of the outer ring has cylindrical and spherical shape, can be selected according to practical applications, eccentric type in the installation of bearings can be convenient to accurately adjust the shaft position of the bolt, etc. , generally used in automotive camshafts, camshaftis is to control the opening and closing of piston engine valves.<br><br>Structural characteristics of cam bearings<br>1, thick outer ring roller needle bearing and bolt combination structure;<br><br>2, the size has metric series and imperial series;<br><br>3, the bearing bolts are set with lube channel;<br><br>4, for the convenience of installation, in the large end of the bearing design has a "word" and "hexagonal hole type" wrench assembly method;<br><br>5, the outer surface of the outer ring has cylindrical and spherical shape, can be selected according to the practical application of the occasion;<br><br>6, full roller type applicable and bear a large load, low speed occasion;<br><br>7, eccentric type in the installation of bearings can be convenient to precisely adjust the shaft position of the bolt.<br><br>Click to go to view the chart comments<br><br>How cam bearings are maintained<br>1, the newly put into use cam rotor pump, generally after 100 hours of operation must be replaced grease (oil), after each 500 hours of operation to replace once.<br><br>2, the use of grease lubrication of mobile bearings, after 1500 hours of operation, should replace grease, filling the amount of oil can not be too much or too little, because too much or too little grease will cause bearing heat, refueling volume generally master in the bearing room volume of 2/1----2/3 is appropriate.<br><br>3, for the use of lubricants lubrication bearings, the amount of oil should be added to the specified position.<br><br>4, oil or grease container spout to clean, usually should be sealed, should not have dust, iron chips and other debris, so as not to damage the bearing.<br><br>5, motor bearings using nano-based grease, this grease is characterized by high temperature (125 degrees C), but easy to dissolve in water, so it can not be used for the lubrication of water pump bearings.<br><br>Access to camshafts<br>1, check the bending degree of the camshaft. With the two ends of the shaft neck as the fulcrum, radial beat must not be large dry 0.03mm, super 0.1Omm, can be corrected by cold pressure correction method.<br><br>2, the lift of the cam is not less than 5% of the specified value, not to repair the cam, but should check the cam base round, cam base round to the camshaft shaft shaft radial round beat tolerance;<br><br>0.03mm, overhaul allows no greater than O.05mm.<br><br>3, cam surface rough, hit, hemp point should be repaired. When the top of the cam is worn over 1.00mm, the top of the cam should be welded and repaired to restore the original size and shape.<br><br>Or replace it.<br><br>4, the oil pump on the camshaft drive gear, if the flank is rough or the flank wear is more than 0.50mm, should be repaired. The gear individual teeth are damaged and are allowed to continue to be used after grinding off sharp angles without affecting use. The eccentric wheel surface roughness of the drive oil transmission pump must not exceed O.80 m. When the eccentric wheel is worn more than 2.00mm, the camshaft should be welded to repair or replace.<br><br>5, camshaft sylline neck cylindrical tolerance: overhaul standard for 5 m, overhaul allows not more than 15 m, the use limit of 25 m.<br><br>6, camshaft mounttiming gear shaft neck radial round run-out tolerance and axial end-end round-beating error of the end-stop end face, are not greater than 35 m.

The cam bearing is also a kind of bearing, which has a thick outer ring needle bearing and bolt combination structure; the bolt of the bearing is provided with a lubricating oil passage; the outer surface of the outer ring is cylindrical and spherical, which can be selected according to the actual application; the eccentric type can be used to adjust the axis position of the bolt conveniently and accurately when installing the bearing, etc., which is generally used for the automobile camshaft, and the camshaft is a control piston engine The axis of the opening and closing action of the valve.<br>Structure characteristics of cam bearing<br>1. Thick outer ring needle bearing and bolt combination structure;<br>2. The sizes are metric series and English series;<br>3. A lubricating oil passage is arranged in the bolt of the bearing;<br>4. In order to facilitate the installation, the large end of the bearing is designed with "one word" and "hexagon hole" wrench assembly mode;<br>5. The outer surface of the outer ring is cylindrical and spherical, which can be selected according to the actual application;<br>6. The full roller type is suitable for the occasion of large load and low speed;<br>7. The eccentric type is convenient to precisely adjust the axis position of the bolt when installing the bearing.<br>Click to view the comments<br>Maintenance method of cam bearing<br>1. For the newly put cam rotor pump, the lubricating grease (oil) shall be replaced after 100 hours of operation, and it shall be replaced every 500 hours later.<br>2. For the flow bearing lubricated by grease, after 1500 hours of operation, the grease shall be replaced. The amount of oil to be added shall not be too much or too little, because too much or too little grease will cause the bearing to heat up. Generally, the amount of oil to be added shall be 2 / 1-2 / 3 of the volume of the bearing chamber.<br>3. For bearings lubricated with lubricating oil, the amount of oil shall be added to the specified position.<br>4. The container for lubricating oil or grease shall be clean and sealed at ordinary times. There shall be no dust, iron chips and other sundries to avoid damaging the bearing.<br>5. The motor bearing adopts nano base grease, which is characterized by high temperature resistance (125 ℃), but easy to dissolve in water, so it cannot be used for the lubrication of water pump bearing.<br>Maintenance of camshaft<br>1. Check the curvature of the camshaft. Take the journal at both ends as the fulcrum, the radial runout shall not be greater than 0.03mm, and if it exceeds 0.1omm, it can be corrected by cold pressing correction method.<br>2. When the lift of the cam is not less than 5% of the specified value, it is not allowed to grind the cam, but the radial circle runout tolerance of the cam base circle and the cam base circle to the camshaft axis shall be checked; the overhaul standard is<br>0.03mm, overhaul is allowed to be no more than 0.05mm.<br>3. The surface of cam is rough, bruised and pockmarked. When the wear of the top of the cam exceeds 1.00mm, the top of the cam shall be repaired and ground after overlaying to restore the original size and shape,<br>Or replace.<br>4. If the tooth surface of the oil pump driving gear on the camshaft is rough or the tooth surface is worn more than 0.50mm, it should be repaired. If individual gear teeth are damaged, it is allowed to continue to use after the sharp angle is worn off without affecting the use. The surface roughness of the eccentric wheel driving the oil transfer pump shall not exceed 0.80 μ M. When the wear of eccentric wheel exceeds 2.00mm, the camshaft shall be repaired or replaced by overlay welding.<br>5. Cylindricity tolerance of each journal of camshaft: overhaul standard is 5 μ m, overhaul allowance is not more than 15 μ m, and service limit is 25 μ M.<br>6. The radial circular runout tolerance of the Journal of the camshaft timing gear and the circular runout error of the end face of the axial thrust face are not more than 35 μ M.<br>