A hand-operated agricultural screening machine

Abstract

The invention discloses a hand-operated agricultural screening machine. The hand-operated agricultural screening machine comprises a screening machine whole body, wherein the screening machine whole body comprises a screening basket and a bracket, a connecting plate is fixedly connected with one end of a rotating handle far away from an insertion opening, a plurality of rotating rods are fixed onthe connecting plate, an upper gear is arranged between the screening basket and a fixing sleeve shell, the upper gear penetrates through the rotating handle, and the upper gear and a lower gear are movably connected. The lower gear is connected to the outer wall of the screening basket through a connecting block, the lower gear is arranged on a rack, the rack is arranged on each rotating rod, andeach rotating rod is arranged at the bottom of the screening basket. A center block is arranged in the middle of each rotating rod, and one end of the center block far away from each rotating rod isembedded in the bracket. The hand-operated agricultural screening machine can adjust the size of a screening hole according to the grain size, has wide application range, does not need electricity inthe whole screening process, is energy-saving and environment-friendly, at the same time, a screen can be driven to swing and screen by the rotating handle, and thus the efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of screening machines, in particular to a hand-operated agricultural screening machine. Background technique [0002] During the crop harvest season, farmers need to screen the dried grains to remove dust, rice husks, etc. mixed in the grains, until finally the grains without impurities can be stored in the granary , most of the existing screens used in agricultural production have simple functions, and the screening operation is carried out in the form of manual holding. This kind of screen is low in cost, but the labor intensity is high, and the long-term use will make the operator's arms sore , affecting the working efficiency of screening, some mechanical screen mechanisms have appeared in some large-scale production plants. Large-scale agricultural production use. [0003] In the prior art, a device for grain screening with application number "201510755165.4" includes a base, a hopper, a vertical pass...

AI Technical Summary

Problems solved by technology

[0004] However, there are still obvious defects in its use: 1. The size of the screen cannot be adjusted, and the scope of use is limited; 2. The equipment can only be used when it is powered on, which limits the use conditions and is not conducive to energy conservation and environmental protection; 3. The screening basket is fixed and cannot swing back and forth

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