CN202005153U - Threshing and separating device used for rice harvester - Google Patents

Abstract

This utility model relates to a threshing and separating device for a rice harvester. It includes a frame, rollers supported on the frame, and a separating mechanism located below the rollers. The rollers include a tangential roller and an axial roller located behind and parallel to the tangential roller. A tangential roller concave screen is installed below both the tangential and axial rollers. A chopper is fixedly connected to the straw discharge end of the axial roller. After the tangential roller performs initial threshing of the rice, the axial roller performs secondary threshing to achieve better threshing results and reduce rice harvesting losses. After threshing, the straw is chopped and returned to the field by the chopper, which is environmentally friendly and does not damage the organic components of the soil.

Description

Threshing and separating device for rice harvester

technical field

The utility model relates to a rice harvester, in particular to a threshing and separating device for the rice harvester.

Background technique

my country has a wide range of rice planting areas, high yields, and many varieties. After the rice is harvested every season, a large amount of straw is set on fire after being dried in the field, which not only causes environmental pollution, but also destroys the organic components of the soil. The existing grain harvester has a high harvesting loss rate when harvesting rice with high yield and difficult threshing, and cannot realize the chopping of straw and returning it to the field. Here it is the weak point that existing technology exists.

Contents of the invention

The purpose of the utility model is to provide a threshing and separating device for a rice harvester which has a low harvesting loss rate and can realize straw returning to the field for the deficiencies in the prior art.

This solution is achieved through the following technical measures: the threshing and separating device for rice harvester includes a frame, a drum supported on the frame and a separation mechanism located below the drum, and the drum includes a cut-flow drum and a drum located behind it and The axial flow drum parallel to it, the cut flow drum concave screen is arranged under the cut flow drum, the axial flow drum concave screen is arranged under the axial flow drum, and the grass discharge port of the axial flow drum is fixedly connected with a chopper.

The above-mentioned chopper includes a chopping drum fixedly connected with the axial flow drum and a fixed knife fixed on the frame, the stalk is driven to rotate through the chopping drum, the stalk is stirred evenly, and the stalk is chopped and returned to the field by the fixed knife .

The above-mentioned chopping drum is provided with a moving knife that cooperates with the fixed knife, and through the cooperation of the fixed knife and the moving knife, the purpose of stalk chopping and returning to the field can be better realized.

The cutting flow roller drives the axial flow roller through the transmission mechanism, so that the two can rotate synchronously.

The above-mentioned transmission mechanism adopts a chain transmission mechanism to realize smooth transmission.

The above-mentioned separating mechanism adopts a vibrating sieve, and the threshed rice is screened and separated through the vibrating sieve.

The beneficial effect of this scheme can be known according to the description of the above scheme. In the threshing and separating device for rice harvester, the drum includes a tangential flow drum and an axial flow drum located behind it and parallel to it. Cutting flow drum concave screen, the axial flow drum concave screen is arranged under the axial flow drum, and the grass discharge port of the axial flow drum is fixedly connected with a chopper. After the primary threshing of rice by the cross-flow drum, the axial-flow drum performs secondary threshing to achieve better threshing effect and reduce the harvesting loss rate of rice. After the threshing is completed, the straw is chopped and returned to the field by a chopper, which is environmentally friendly and will not damage the organic components of the soil. This shows that compared with the prior art, the utility model has substantive features and progress, and the beneficial effects of its implementation are also obvious.

Description of drawings

Fig. 1 is a front structural schematic diagram of a specific embodiment of the present invention.

Fig. 2 is a top structural schematic diagram of a specific embodiment of the present invention.

In the figure, 1 is a cutting flow drum, 2 is an axial flow drum, 3 is a frame, 4 is a vibrating screen, 5 is an axial flow drum concave screen, 6 is a cutting flow drum concave screen, 7 is a moving knife, 8 is a Fixed knife, 9 is chopping drum, and 10 is chopper, and 11 is sprocket wheel, and 12 is chain.

Detailed ways

In order to clearly illustrate the technical characteristics of this solution, the following will describe this solution through specific implementation modes and in conjunction with the accompanying drawings.

A kind of threshing and separating device for rice harvester, as shown in Fig. 1 and Fig. 2, it comprises frame 3, the cylinder supported on frame 3 and the separation mechanism positioned at the bottom of the cylinder, the separation mechanism adopts vibrating screen 4, the The roller includes a cutting flow roller 1 and an axial flow roller 2 located behind it and parallel to it, the cutting flow roller 1 drives the axial flow roller 2 through a transmission mechanism (such as a chain transmission mechanism), and a cutting flow roller is arranged under the cutting flow roller 1 Concave screen 6, axial flow drum concave screen 5 is arranged below the axial flow drum 2, and a chopper 10 is fixedly connected to the outlet end of the axial flow drum 2, and the chopper 10 includes a The connected chopping drum 9 and the fixed knife 8 fixed on the frame 3 are provided with a moving knife 7 cooperating with the fixed knife 8 on the chopping drum 9 .

During operation, the cutting-flow drum 1 drives the axial-flow drum 2 and the chopping drum 9 fixedly connected with the axial-flow drum 2 through a chain transmission mechanism to rotate synchronously at different speeds.

After the rice to be threshed enters the threshing and separating device through the feeding port of the cutting flow drum 1, it is firstly threshed by the cutting flow drum 1, and the rice grains that are taken off fall on the vibrating screen 4, and the vibrating screen 4 threshed it. Separation is carried out, and the impurities are separated out. Under the action of centrifugal force, the rice straw enters the axial flow drum 2 along the tangential direction of the tangential flow drum 1, and the axial flow drum 2 performs secondary threshing and separation on it. The removed rice grains fall on the vibrating screen 4, and the impurities in the rice grains are separated by the vibrating screen 4, and the rice straw in the axial flow drum 2 is threshed and separated, and moves along the axial direction of the axial flow drum 2. The end of the grass discharge mouth moves to complete secondary threshing, and the separated rice straw enters the chopper 10 from the grass discharge mouth, and the rice straw is discharged after being chopped under the cooperation of the fixed knife 8 and the moving knife 7, realizing Shredded rice stalks returned to the field.

The technical features not described in the utility model can be realized by the prior art, and will not be repeated here.

Claims (6)

1. A threshing and separating device for a rice harvester, which comprises a frame, a drum supported on the frame and a separation mechanism positioned below the drum, characterized in that: the drum includes a cut-flow drum and is positioned behind it and parallel to it. The axial flow drum is equipped with a cutting flow drum concave plate screen under the cutting flow drum, and the axial flow drum concave plate screen is arranged under the axial flow drum. The grass discharge port of the axial flow drum is fixedly connected with a chopper. 2. The threshing and separating device for rice harvester according to claim 1, characterized in that: the chopper includes a chopping drum fixedly connected with the axial flow drum and a fixed knife fixed on the frame. 3. The threshing and separating device for rice harvester according to claim 2, characterized in that: said chopping drum is provided with a moving knife matched with a fixed knife. 4. The threshing and separating device for rice harvester according to claim 1, characterized in that: the cutting flow drum drives the axial flow drum through a transmission mechanism. 5. The threshing and separating device for rice harvester according to claim 4, characterized in that: the transmission mechanism adopts a chain transmission mechanism. 6. The threshing and separating device for rice harvester according to claim 1, characterized in that: the separating mechanism adopts a vibrating screen.

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