FIELD: mechanical engineering. SUBSTANCE: ball has support, resilient envelope, elliptical rigid frame disposed under the envelope. Axis provided with a load is mounted in space of the frame by bearings. Load is driven into rotation by drive and has holes with groove. Drive is mounted onto the support and has flexible clutch and output spline shaft, which is disposed inside hole of the load. Resilient envelope and frame have holes brought in align with hole of the load. EFFECT: improved reliability; improved efficiency. 7 cl, 17 dwg
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