FIELD: mechanical engineering. SUBSTANCE: breaker has bed with breaking chamber mounted thereon, and apparatus for balancing dynamic loads applied to breaker. Apparatus has movable jaws mounted in bearings on eccentric bushings fixed on drive shaft and spacer plates joined to movable jaws. Spacer plates abut against slide of discharge slot size regulating device. Eccentric bushing eccentricities are set out of phase with respect to eccentricity of drive shaft eccentric part. EFFECT: enhanced reliability in operation and prolonged service life of jaw breaker. 7 cl, 4 dwg
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