Impeller wear-resistant connecting device

Abstract

The utility model relates to the technical field of fans, and discloses an impeller wear-resistant connecting device which comprises a rear disc and a hub, an annular counter bore is formed in the left side of the rear disc, a first through hole communicated with the annular counter bore is formed in the right side of the rear disc, and a second through hole is formed in the side face of the hub. A hexagonal head screw penetrating through the first through hole and the second through hole is arranged in the annular counter bore, the end, penetrating through the hub, of the hexagonal head screw is sleeved with a hexagonal nut in a threaded mode, an annular groove is formed in the left side of the rear disc, the annular counter bore is located in the middle of the annular groove, and a protective cover is sleeved with the annular groove in a threaded mode. The anti-abrasion hexagonal head bolt has the advantages that the hexagonal head bolt is prevented from being abraded, the machining and manufacturing period is short, the manufacturing cost is low, the anti-abrasion hexagonal head bolt is suitable for media with large dust content and high dust-containing particle hardness, the bolt is prevented from being abraded, and the like.

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