FIELD: machine building.
SUBSTANCE: invention relates to machine building, namely, to drives of quarter-turn valves. Quarter-turn valves drive comprises housing, on which there is device, creating torque. In housing there is transfer mechanism, enabling transmission of torque from device shaft (2), creating torque to gate shaft (13). Transfer mechanism is made in form of four-link mechanism. Transfer mechanism first lever (5) from one side is fixed in housing with possibility of rotation and connected with drive device, on other side is articulated with one side of connecting rod (8). Con-rod on other side is connected to one side of second lever (11), on other side second lever is fixed in housing with possibility of rotation and connected to gate shaft. First lever arm length is less than second lever arm length. First lever makes quarter of turn, and second makes more than quarter of turn, but not more than one turn.
EFFECT: higher maximum gear ratio.
6 cl, 7 dwg
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