Patent ID: 9102474
Filing Date: 2015-08-11
Classification: B23Q,B65G,F16C

Abstract:
1. A rotation mechanism comprising: a mandrel comprising a shaft portion, a first annular contact portion and a second annular contact portion, wherein the shaft portion has a outer surface, and the first annular contact portion and the second annular contact portion are located on the outer surface and respectively surround the axis of the mandrel; a rotation axle comprising an annular portion, a third annular contact portion and a fourth annular contact portion, wherein the annular portion has a shaft hole and an inner surface forming the shaft hole, the third annular contact portion and the fourth annular contact portion are located on the inner surface, and the mandrel passes through the shaft hole; a needle roller bearing in contact with the first annular contact portion and the third annular contact portion, and being located between them; and an angular bearing in contact with the second annular contact portion and the fourth annular contact portion, and located between the outer surface and the inner surface.