Rice threshing machine

Abstract

The invention discloses a rice threshing machine which comprises a hollow box body, a threshing rotary drum arranged inside the box body, a threshing rotary drum power device arranged outside the box body and connected with the threshing rotary drum and a sieve arranged under the threshing rotary drum. The sieve is horizontally arranged right under the threshing rotary drum, two sides of the sieve are connected with driving rods capable of driving the sieve to perform axial reciprocating motion along the threshing rotary drum, the driving rods are connected with a sieve power device, the side of the sieve is further provided with a gear connected with the threshing rotary drum, and a flipping block extending towards the sieve and capable of flipping straws is arranged on the gear. The sieve can perform reciprocating motion in the axial direction of the threshing rotary drum so as to decrease straws accumulated at two ends of the sieve, and grains wrapped in the straws are further decreased and can smoothly pass through the sieve.

Description

technical field [0001] The invention relates to agricultural machinery, in particular to a paddy thresher. Background technique [0002] Existing rice threshers, such as the Chinese utility model patent whose authorized publication number is CN200959746Y, a rice thresher includes a hollow box body, a bracket supporting the box body and a threshing cylinder arranged inside the box body, and also includes The power device provided on the outside of the box and on the support to provide the power source for the threshing cylinder, the separation device arranged inside the box, the separation device includes a first separation device composed of a screen and a The second separation device composed of blower is used to realize threshing, automatic separation of rice, straw and screening of shriveled grains, but since the straw and grains are wet, and the straw and grains are constantly falling from the threshing drum to the screen, and the The sieve is only vibrating, so it is e...

AI Technical Summary

Problems solved by technology

[0002] Existing rice threshers, such as the Chinese utility model patent whose authorized publication number is CN200959746Y, a rice thresher includes a hollow box body, a bracket supporting the box body and a threshing cylinder arranged inside the box body, and also includes The power device provided on the outside of the box and on the support to provide the power source for the threshing cylinder, the separation device arranged inside the box, the separation device includes a first separation device composed of a screen and a The second separation device composed of blower is used to realize threshing, automatic separation of rice, straw and screening of shriveled grains, but since the straw and grains are wet, and the straw and grains are constantly falling from the threshing drum to the screen, and the The sieve is only vibrating, so it is easy to screen out a small part of the grain wrapped in the straw and discard it, resulting in waste; and the rice ear is very heavy, and the joint between the rice ear and the straw is very brittle, so that when the rice ear passes through the threshing drum , part of the ears of rice are disconnected from the nodes, so when they pass through the sieve, they are screened out and discarded like straw, which also causes waste

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