Ball switching joint e.g. ball plunging joint, for coupling shafts with one another for transmission of drive power, has ball grooves including variable helix angular bracket, where amount of bending angle is increased to contact surface

摘要

The joint has a retainer (7) arranged between a joint external part (2) and a joint internal part (3), where the retainer includes a window (8) in which the ball (6) is accommodated. Ball grooves (4, 5) of the joint external part and joint internal part include a variable helix angular bracket. The joint internal part is arranged with the ball groove (5). An amount of spiral angle for respective component part rotation axes is minimum at a contact surface of the ball during non-diffraction of the pivot, and an amount of big bending angle is increased to the contact surface.