FIELD: mechanical engineering. SUBSTANCE: sleeve includes female connecting member and male connecting member. Female connecting member has cylindrical cavity for cylindrical section of male connecting member; embracing surface of cavity has at least one groove used for flexible outlet and inlet of movable locking members. Outer surface of groove of female member is provided with circular flange which is coaxial relative to it and is located in one line with embracing surface of this cavity. Locking members include at least three metal arc members received by groove; each member is shifted by flexible member to inclined position relative to symmetrical longitudinal axis of female member of coupling; inclined position of members is their locking position. In this position, connecting members form truncated cone whose wide base in support by outer side of groove radially on the flange outside. EFFECT: enhanced reliability of connection. 10 cl, 4 dwg
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