RADIAL-PISTON HYDRAULIC MOTOR Russian patent published in 1996 - IPC

FIELD: mechanical engineering. SUBSTANCE: hydraulic motor comprises housing and/or cylinder with a cover and at least one piston mounted for permitting a contact with the eccentric of the output shaft, rocking motion and interaction with the guide body arranged radially and having a ring portion of the outer convex spherical bearing surface that abuts against the answered ring portion of the concave spherical bearing surface made on the housing or the cylinder cover. The guide body has the end face surface that is perpendicular to its longitudinal axis and faces the ring portion of the bearing surface of the housing or cylinder cover loaded with the pressure of fluid and used as a relief space. In addition the ring portion of the bearing surface of guide body is narrower than the ring portion of the bearing surface of the housing or cylinder cover and it is provided with a ring groove at the end face surface. The ring groove is in communication with the space for draining fluid through an opening. EFFECT: enhanced efficiency. 3 cl, 2 dwg