Patent ID: 6027250
Filing Date: 2000-02-22
Classification: F01B,F04B,F16C

Abstract:
An oscillating bearing for a variable-displacement axial piston hydraulic machine having a swashplate with a convex semi-cylindrical bearing face with provisions for attachment of said oscillating bearing, and a housing with a concave semi-cylindrical bearing saddle, the oscillating bearing comprising:thin outer and inner race members, formed in arcs congruent with the concave surface of the bearing saddle of the housing and the convex bearing face of the swashplate, respectively, each said race member having an axially centered opening, the outer race member having support means on at least one axial end for supporting a timing member which engages a timing feature in said swashplate and synchronizes motion for all parts of said oscillating bearing, and the inner race member having means for holding the inner race against the convex bearing face of said swashplate;a separator interposed between said inner and outer race members, said separator being formed in an arc having inner and outer surfaces parallel to the proximal surfaces of said race members, said separator also having an axially centered opening and two additional substantially rectangular openings axially spaced from the axial ends of the separator and the centered opening, said additional openings serving as pockets for anti-friction rollers, said separator further having one axial end which extends beyond the proximal axial ends of said inner and outer races and which includes a timing notch for engaging said timing member; anda plurality of cylindrical rollers sufficient to fill both roller pockets, said having diameters sufficient to project above and below the surfaces of said separator and to bear against said race members.