VARIABLE-PITCH POTATO FIELD GRADING DEVICE

Abstract

Disclosed in this disclosure is a variable-pitch potato field grading device, including a bracket, where an upper end of the bracket is provided with a grading frame, and an upper end of one side of the grading frame is provided with a feed chute; one side of the feed chute facing the grading frame is provided with an opening, and a plurality of groups of spiral grading groups perpendicular to the feed chute are rotatably connected within the grading frame; each spiral grading group includes two spiral conveying rods disposed in a mirrored manner, and a pitch of a spiral blade on each spiral conveying rod gradually increases in a direction away from the feed chute; one end of each spiral conveying rod extends out of the grading frame and is provided with a transmission gear, and all the transmission gears are disposed side by side and engaged in pairs.

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