Ball bearing

Abstract

The invention discloses a ball bearing, which comprises an outer ring, an inner ring and a steel ball installed between the outer ring and the inner ring. The ball bearing also comprises an annular protective plate fixed on the end face of the ball bearing; the internal diameter of the protective plate is 9.00 mm, the external diameter of the protective plate is 9.00 mm, and the tolerance of the internal diameter and the external diameter of the protective plate is 0.3-0.5 mm. The invention can guarantee the sealing performance of the ball bearing in long time high speed running process, effectively prevent the pollution caused by dust entered inside the bearing, and prevent the grease outside the ball bearing from penetrating into the ball bearing caused by high speed running, and prevent the grease inside the ball bearing from penetrating out caused by the same.

Description

Technical field [0001] The invention relates to the technical field of bearings, and more specifically to a ball bearing. Background technique [0002] Ball bearings have a wide range of applications in various mechanical devices. Ball bearings include inner ring, outer ring and steel balls embedded between the inner ring and outer ring. When used, in order to reduce the resistance of the steel ball to rotate, increase the rotation of the steel ball. Flexibility. Lubricants such as grease or graphite are usually added between the inner and outer rings. [0003] The working life of ball bearings is largely affected by the sealing properties. Therefore, corresponding sealing rings are installed on both ends of the newly developed ball bearings. On the one hand, the sealing ring must prevent the lubricant from leaking out of the bearing; on the other hand, it should also prevent external contaminants from entering the ball bearing. This is because pollutants have various effects on ...

AI Technical Summary

Problems solved by technology

Although these two sealing rings play a certain role in sealing, when the ball bearing runs at a low speed (below 20000rpm), it can prevent the entry of dust or the leakage of lubricating grease to the outside; however, when the ball bearing runs at a high speed (30000rpm) for a long time When the performance of the ball bearing sealing ring fails, the external dust will enter the ball bearing and cause the ball bearing to be damaged; moreover, when the performance of the ball bearing sealing ring fails, the ball bearing will experience grease penetration outside the ball bearing during high-speed operation. The grease inside the ball bearing or the grease inside the ball bearing leaks to the outside, which will greatly affect the service life of the ball bearing

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