Full range boosting device for accumulator of on-load tap changer, accumulator, and on-load tap changer

A full range boosting device for an accumulator of an on-load tap changer, comprising a first sheave intermittent mechanism, a second sheave intermittent mechanism, and a central gear;

• wherein the first sheave intermittent mechanism and the second sheave intermittent mechanism each comprise a dial gear, a driving dial, a dial round pin, a driven sheave and a boosting plate;
• the driving dial with the dial round pin and the dial gear are fixed coaxially with no contact in an axial direction, the boosting plate is fixedly connected to the driven sheave, and a radial slot is formed in the driven sheave;
• wherein the first sheave intermittent mechanism and the second sheave intermittent mechanism are installed alternately in an up-down direction, and two dial gears are driven by the central gear;
• and a positional relationship of the first sheave intermittent mechanism and the second sheave intermittent mechanism satisfies following constraints:
• in the first sheave intermittent mechanism, the driving dial rotates an angle of α1, the boosting plate on the driven sheave rotates an angle to be boosted by a cooperation of the dial round pin and the radial slot in the driven sheave;
• and
• when the driving dial of the second sheave intermittent mechanism rotates an angle of (360°−α1), the dial round pin of the second sheave intermittent mechanism is exactly located at a notch of the radial slot.