Bearing and harmonic reducer

The utility model provides a bearing and a harmonic reducer. The bearing comprises an inner ring, an outer ring, a framework oil seal and a sealing ring. The outer ring is arranged in the circumferential direction of the inner ring in a sleeving mode, a groove, a sealing groove and a roller groove are formed between the inner ring face of the outer ring and the outer ring face of the inner ring, and the sealing groove is closer to the roller groove than the groove; the framework oil seal is embedded in the groove; the sealing ring is arranged in the sealing groove and is sealed between the inner ring and the outer ring; wherein a first lip edge and a second lip edge are arranged on the inner wall and/or the outer wall of the sealing ring, and a containing groove is formed between the first lip edge and the second lip edge. By means of the arrangement, a sealing block is arranged between the framework oil seal and the roller groove and applied to the harmonic reducer, the supporting effect can be achieved, the