The locomotive camshaft 410 bearing extractor is a small, left and right side transmission gear bearing cage with 100 DF4 diesel locomotives. Damage is a frequent failure. In the event of such a failure, the small and minor repair sections will face a large repair process. It is necessary to remove the camshaft timing gear and the large and small over-wheels, which is time-consuming and laborious, and sometimes needs to be returned to the intermediate repair section for processing. . Therefore, research and design of special bearing removal tools has become a problem that must be solved. 2410 bearing extractor design 2.1 structure Figure 1410 bearing special extractor 11 main bearing plate 21 auxiliary pull rod 31 main ejector The extractor consists of the main bearing plate, the main ejector, the auxiliary struts, as shown in Figure 1.
The main bearing plate is a rectangular body with a width of 60mm, a thickness of 30mm and a length of 240mm. The material is Q235 steel. The two ends of the main bearing plate are each formed into a semicircular rectangular process guide hole with a hole length of 60 mm and a width of 20 mm, and two auxiliary rods can pass through. A 30mm hole is machined in the middle of the main bearing plate, and the main ram is a trapezoidal screw of M30@300mm. One end of the auxiliary pull rod is a long bolt of M18 coarse common thread, and the other end is a flat drum end.
Principle When the 410 bearing cage is damaged, after removing the corresponding peripheral parts, insert the flat end of the auxiliary extractor into the bearing raceway symmetrically, rotate 90b to clamp the flat drum end into the bearing raceway, and then use the inspection rail. The locomotive and vehicle workers use the saw blade milling cutter to cut the slot and the matching tool to clamp 70 slots in the computer numerical control vehicle.
The standard grooving inserts can not meet the requirements of these parameters. Therefore, a saw blade cutter with a diameter of 5018mm and a thickness of 01762mm was selected. At the same time, a tool holder matched with the turret of the lathe was made. After the saw blade is milled and positioned with the locating pin, the groove can be machined. Put the main bearing plate on the end face of the main ejector pin at the end face of the small over wheel axle, tighten the auxiliary tie rod nut to make it evenly stressed, and tighten the main ram with a wrench to push the small intermediate shaft of the wheel to remove the bearing. When replacing a new bearing, the bearing can be hammered in with a copper rod or the bearing can be pushed in with a small over-wheel tightening nut.
On-site use effect The use of this bearing extractor in the Ang Nang locomotive section reduces production costs and increases production efficiency. Since 1998, it has repaired more than 30 sets of locomotives, saving more than 600 hours of work and saving 10,000 yuan. For small and minor repair sections with small production scales, the bearing extractor is very popular.
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