| 摘要 |
<p>Spherical ball drive mechanism (1) for directly coupling a rotary force motor (3) to a valve member (4), includes a spherical bearing assembly at one end of the valve member. The spherical bearing assembly (1) consists of an outer race member (15) having a concave spherical inner bearing surface (16) and a spherical bearing member (18) having a convex spherical outer bearing surface (21) complementary to the concave spherical inner bearing surface of the outer race member and received therein. The outer race member (15) has a longitudinal axis substantially perpendicular to the longitudinal axis of the valve member (4) and a transverse center axis (t) radially offset from the longitudinal axis of the valve member. An eccentric output shaft (2) of the rotary force motor (3) extends substantially perpendicular to the longitudinal axis of the valve member (4) for receipt in a longitudinal bore (19) in the spherical bearing member (18).</p> |
