(1) The working principle of the screw conveyor: The screw conveyor is mainly used to transport grains and miscellaneous surplus. For example, the mixing of grains in the combined rice combine harvester, the mixing of miscellaneous residues and the evenly distributed mixing in the grain tank are all horizontal pushing and mixing, and the mixing in the unloading bucket is the mixing in the inclined direction.

(2) The working principle of the scraper conveyor: it can transport grains and ears. It can be conveyed obliquely or vertically, and the inclination angle is generally not more than 45 degrees. The scraper conveyor consists of a sleeve chain with double wings. A rubber scraper is installed on it and runs in the conveying housing.

(3) The working principle of the thrower: the thrower, also known as the grain lifter, is composed of an impeller, a casing and a pipe. Usually installed on the shaft at the outlet end of the screw conveyor and connected as a whole. The working principle of the rice combine harvester: when the semi-feeding rice combine harvester is harvesting, the crop supporter is first inserted into the crop, the crop is straightened and pushed to the header, and the auxiliary crop support device (star wheel or rubber finger) Drive belts, etc.) assist in reeling, which is cut by the cutting device. After the crop is cut, the harvester conveyor chain immediately transports the crop to the intermediate conveying device, and the intermediate conveying clamping chain gradually changes the vertical state of the stalks into a horizontal state, clamps and transports them to the feeding end of the threshing drum, and hands them over to the threshing clamping chain. , and feed the ear part into the drum along the axial direction of the drum for threshing. During the axial movement of the crop along the drum, the ear head is continuously brushed and impacted by the drum teeth, and the grains are taken off. The removed grains fall into the cleaning device through the concave sieve holes, and are cleaned by the shaking plate and the fan airflow. The clean grains are sent to the grain box or bagged by the grain screw conveyor; the broken stems and broken ears are discharged from the main threshing drum to the auxiliary drum for secondary threshing. The sundries are discharged out of the machine from the miscellaneous discharge port of the auxiliary drum; the threshed stalks are always clamped by the clamping chain and discharged from the drum outlet, and fall on the gravity stacking device for quantitative stacking. Some machines are equipped with a stalk chopping device at the discharge of the stalk, and the stalk is chopped and returned to the field. The shaft at the outlet end of the feeder is connected as a whole.