Rotation transmitter

A rotation transmitter connecting a pair of rotary members rotatable around a common rotation axis, the rotation transmitter allowing a misalignment of the rotary members with respect to the common rotation axis, the rotation transmitter comprising:

• a first member connected to one of the pair of rotary members;
• a second member connected to the other of the pair of rotary members;
• and
• an intermediate member connecting the first member to the second member, wherein
• the first member is connected to the intermediate member via a first mechanism capable of (i) rotation around a first axis intersecting with the common rotation axis and (ii) movement in a direction parallel to the first axis,
• the second member is connected to the intermediate member via a second mechanism capable of (i) rotation around a second axis intersecting with the common rotation axis and the first axis and (ii) movement in a direction parallel to the second axis, and
• the second mechanism comprises:
• a second radial pin supported by one of the second member and the intermediate member and extending along the second axis;
• a plurality of pairs of rollers disposed at different positions of the second radial pin and each of the pairs of rollers holding the second radial pin therebetween at both lateral sides of the second radial pin;
• axial pins extending in a direction parallel to the common rotation axis while supporting the respective rollers and being supported by the other of the second member and the intermediate member;
• and
• second stroke bearings interposed between the rollers and the axial pins and supporting the rollers so that the rollers are rotatable around the axial pins and movable in the direction parallel to the common rotation axis.