A power head driving key sleeve comprises a sleeve body and a key bar; The utility model further comprises a plurality of pin sleeves and a key nut plate on the sleeve body; The upper and lower hollow cylinders of the pin sleeve are respectively supported in the coupling holes of the sleeve body and the key bar; A bolt and a first washer are arranged in the coupling hole; The sleeve body and the key bar are connected together by the bolt and the first washer.
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