| 摘要 |
A method and apparatus for accommodating mis-alignment of a piston rod in a reciprocating force delivery device is provided. A piston rod is coupled to a piston by a pivot bearing disposed around the piston rod inside the piston. The pivot bearing contacts an internal surface of the piston and provides a biaxial pivot point, which may also be triaxial, for the piston rod inside the piston. The pivot point is located near the centroid of the piston, enabling forces not aligned with the axis of the piston to be decoupled into axial and transverse components. The force decoupling avoids rotational moment on the piston, minimizing the possibility of metal-to-metal contact between components of the piston and the cylinder liner. |
