Working principle, had better have a graph.A knife fish answer, because there is no map, it is difficult to understand.Link to a simple sketch, you can draw it yourself.
The roller swings on the outer surface of the coat, but it works at a distance of about 1 to 1.5 degrees
The contact surface of the outer ring of the bearing and the roller is a spherical surface, and the shape of the roller is also processed into a spherical ball which is matched with the outer ring. After the installation, the inner part of the roller is allowed to swing with the inner ring and the outer ring to achieve the purpose of adjusting the heart
The roller swings on the outer surface of the coat, but it works at a distance of about 1 to 1.5 degrees
