A grain-preventing roller brush for a thresher

Abstract

This utility model relates to the field of threshing technology, and in particular to an anti-grain-runaway roller brush for a threshing machine. It includes a threshing machine main shaft, an anti-grain-runaway roller brush, and toothed rods. The anti-grain-runaway roller brush has an adjustable bristle length structure above it, and a mounting iron plate is movably connected above it. The mounting iron plate has mounting holes fixedly opened inside. This anti-grain-runaway roller brush is made of hard plastic or nylon filament and is installed on the roller toothed rods of the threshing machine main shaft. Each toothed rod has multiple anti-grain-runaway roller brushes arranged in a spiral pattern. When the roller rotates during threshing, the anti-grain-runaway roller brushes rotate simultaneously with the threshing machine main shaft. The anti-grain-runaway roller brushes rub against the concave sieve below, completing the cleaning process and removing impurities generated during threshing. The cleaning by the anti-grain-runaway roller brush keeps the internal gaps of the concave sieve clear, allowing the threshed grains to be smoothly discharged below the concave sieve, thus solving the problem of grain runaway during threshing.

Description

Technical Field

[0001] This utility model relates to the field of threshing machine technology, specifically to an anti-grain-running roller brush for a threshing machine. Background Technology

[0002] A threshing machine is a harvesting machine that separates the grains from the stalks of crops, primarily referring to harvesting machinery for grain crops. Different types of threshing machines are used depending on the crop. For example, a "rice threshing machine" is suitable for threshing rice; a machine used for threshing corn is called a "corn threshing machine," and so on.

[0003] For example, the authorization announcement number "CN102461399A" describes a threshing machine that uses a fan at the rear of the threshing drum to blow the leaves of the threshed grain out of the drum, which helps separate the leaves from the grains and achieves a high threshing effect. However, existing threshing machines experience grain runoff when the crops are either dry or wet. This is because when the gap between the drum teeth and the concave screen is large, the grain is not completely threshed, and impurities clog the concave screen, resulting in grain runoff. When the gap is small, the grain breakage rate is high. When the crops are dry, the stems are easily broken, resulting in more impurities and clogging the concave screen. The grains do not fall below the concave screen and are discharged from the machine with the straw, causing grain runoff. When the crops have high moisture content, the threshed stems are not easily broken and clog the concave screen. The leaves also clog the concave screen, and the threshed grains do not fall below the concave screen and are discharged from the machine with the straw, causing grain runoff. Utility Model Content

[0004] The purpose of this invention is to solve the problem of preventing grain runoff by sweeping away impurities from the concave sieve regardless of whether the crop is dry or wet. This invention provides a grain runoff prevention roller brush for threshers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: Design a grain-avoiding roller brush for a thresher, including a thresher main shaft, a grain-avoiding roller brush, and toothed rods. Multiple toothed rods are fixedly installed inside the thresher main shaft. An adjustable structure for the length of the brush bristles is provided above the grain-avoiding roller brush. A mounting plate is movably connected above the grain-avoiding roller brush. The mounting plate has a fixed mounting hole inside. The outer walls of multiple mounting plates are movably connected to the outer side of the toothed rods.

[0006] Preferably, a concave sieve is rotatably mounted on the outer side of the thresher's main shaft, and the upper part of the inner wall of the concave sieve is rotatably connected to the lower end of the anti-grain-running roller brush, with multiple anti-grain-running roller brushes spirally distributed on the outer side of the toothed rod.

[0007] Preferably, a feed inlet is fixedly opened on one side of the top of the concave plate screen, and a discharge outlet is fixedly opened on the other side of the concave plate screen, and the feed inlet and the discharge outlet are connected.

[0008] Preferably, the adjustable bristle length structure of the roller brush includes a positioning frame and a brush connector. The positioning frame is fixedly installed on the upper outer side of the anti-grain-runaway roller brush. A reserved hole is fixedly opened on the rear side of the positioning frame. A first screw is threadedly connected to the lower rear side of the positioning frame. A first clamping plate is rotatably connected to the top of the first screw. A second screw is threadedly connected to the inner front side of the positioning frame. A second clamping plate is rotatably connected to the front end of the second screw. The brush connector is fixedly installed on the top of the anti-grain-runaway roller brush.

[0009] Preferably, the upper part of the first pressing plate abuts against the lower part of the outer wall of the anti-grain-running roller brush, and one side of the second pressing plate abuts against the side of the outer wall of the anti-grain-running roller brush.

[0010] Preferably, the top of the positioning frame is fixedly installed at the lower end of the mounting plate.

[0011] The present invention discloses an anti-grain-running roller brush for a thresher, which has the following advantages: the anti-grain-running roller brush is made of hard plastic or nylon filament and is installed on the roller toothed rod of the thresher's main shaft. Each toothed rod has multiple anti-grain-running roller brushes arranged in a spiral pattern. When the roller rotates during threshing, the anti-grain-running roller brushes rotate simultaneously with the thresher's main shaft. The anti-grain-running roller brushes rub against the concave sieve below to complete the cleaning, which can remove the impurities generated during threshing. The cleaning by the anti-grain-running roller brushes can keep the internal gaps of the concave sieve clear at all times, and the threshed grains can also be smoothly discharged to the bottom of the concave sieve, thus solving the problem of grain run-out during threshing. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of the front of this utility model; Figure 3 for Figure 1 Internal sectional view; Figure 4 for Figure 2 A side sectional view; Figure 5 A front view of the roller brush used to prevent grain from slipping out; Figure 6 for Figure 5 A side sectional view; Figure 7 for Figure 6 Enlarged diagram of part A in the middle.

[0013] In the diagram: 1. Threshing machine main shaft; 2. Anti-grain-running roller brush; 3. Toothed rod; 4. Concave plate screen; 5. Feed inlet; 6. Discharge outlet; 7. Adjustable roller brush bristle length structure; 71. Positioning frame; 72. Reserved hole; 73. Brush connector; 74. First screw; 75. First pressing plate; 76. Second screw; 77. Second pressing plate; 81. Mounting plate; 82. Mounting hole. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings: Example: Please see Figure 1-6 In this embodiment, a grain-avoiding roller brush for a thresher includes a thresher main shaft 1, a grain-avoiding roller brush 2, and toothed rods 3. Multiple toothed rods 3 are fixedly installed inside the thresher main shaft 1. An adjustable brush bristle length structure 7 is provided above the grain-avoiding roller brush 2. The brush base of the grain-avoiding roller brush 2 is rectangular, and the bristles are round and composed of multiple bristles. A mounting plate 81 is movably connected above the grain-avoiding roller brush 2. Mounting holes 82 are fixedly opened inside the mounting plate 81. The outer walls of the multiple mounting plates 81 are movably connected to the outer side of the toothed rods 3. The mounting plates 81 are made of iron and can be fixed to the outer side of the toothed rods 3 by direct welding, or they can be installed by tightening bolts using the internally drilled threaded mounting holes 82. The anti-grain-running roller brush 2 is made of hard plastic or nylon filament and is installed on the roller toothed rod 3 of the threshing machine main shaft 1. Each toothed rod 3 has multiple anti-grain-running roller brushes 2 arranged in a spiral. When the roller rotates during threshing, the anti-grain-running roller brushes 2 rotate simultaneously with the threshing machine main shaft 1. The anti-grain-running roller brushes 2 rub against the concave sieve 4 below to complete the cleaning, which can remove the impurities generated during threshing. The impurities generated during threshing are due to the accumulation of impurities on the concave sieve, which clogs the concave sieve holes, affects the separation of grains, and causes the grains to be discharged with the straw, resulting in grain run-out. Therefore, the cleaning of the anti-grain-running roller brushes 2 can keep the internal gaps of the concave sieve 4 open at all times, and the threshed grains can also be smoothly discharged to the bottom of the concave sieve 4, solving the problem of grain run-out during threshing.

[0015] A concave sieve 4 is rotatably mounted on the outer side of the thresher main shaft 1. The upper part of the inner wall of the concave sieve 4 is rotatably connected to the lower end of the anti-grain-running roller brush 2. Multiple anti-grain-running roller brushes 2 are spirally distributed on the outer side of the toothed rod 3.

[0016] A feed inlet 5 is fixedly opened on one side of the top of the concave sieve 4, and a discharge outlet 6 is fixedly opened on the other side of the concave sieve 4. The feed inlet 5 and the discharge outlet 6 are connected. The grain will enter at the feed inlet 5 and then be discharged at the discharge outlet 6 at the other end after threshing. The anti-grain-running roller brush 2 is arranged in a spiral from the inlet to the outlet. The anti-grain-running roller brush 2 is driven by the rotation of the roller and generates friction with the concave sieve 4 to clean the concave sieve.

[0017] The adjustable bristle length structure 7 of the roller brush includes a positioning frame 71 and a brush connector 73. The positioning frame 71 is fixedly installed on the upper outer side of the anti-grain-runaway roller brush 2. The positioning frame 71 is welded to the lower part of a rectangular iron mounting plate 81. A reserved hole 72 is fixedly opened on the rear side of the positioning frame 71. The reserved hole 72 on the rear side of the positioning frame 71 can be inserted and then bent out under the positioning frame 71. The first screw 74 and the second screw 76 can be manually turned and rotated, thereby pushing the vertical first pressing plate 75 to press the bristle ends of the anti-grain-runaway roller brush 2 against the lower end of the mounting plate 81. The horizontal second pressing plate 77 can press and smooth the bristles of the bent anti-grain-runaway roller brush 2. When the brush is too long or When the length is too short, the first screw 74 and the second screw 76 can be turned outwards, and the anti-grain-running roller brush 2 will no longer be subject to the clamping force. It can be manually inserted into the reserved hole 72 a certain distance, or pulled out a certain distance, to adapt to the height inside the concave plate screen 4 without trimming the brush. Finally, the first screw 74 and the second screw 76 are screwed back to complete the fixation. The lower rear end of the positioning frame 71 is threaded with the first screw 74, and the top end of the first screw 74 is rotatably connected to the first clamping plate 75. The inner front end of the positioning frame 71 is threaded with the second screw 76, and the front end of the second screw 76 is rotatably connected to the second clamping plate 77. The brush connector 73 is fixedly installed on the top end of the anti-grain-running roller brush 2.

[0018] The upper part of the first pressing plate 75 is pressed against the lower part of the outer wall of the anti-grain-running roller brush 2, and one side of the second pressing plate 77 is pressed against the side of the outer wall of the anti-grain-running roller brush 2. The top of the positioning frame 71 is fixedly installed at the lower end of the mounting iron plate 81.

[0019] Working principle: The thresher uses an anti-grain-running roller brush to prevent the crop from clogging the concave screen, regardless of whether the crop is dry or wet. It can sweep away the impurities and prevent the concave screen from clogging, thus preventing grain from running out. The mounting plate 81 is made of metal iron and can be fixed to the outside of the toothed rod 3 by direct welding, or it can be installed by tightening bolts through the internally drilled threaded mounting holes 82. The anti-grain-running roller brush 2 is made of hard plastic or nylon filament and is installed on the roller toothed rod 3 of the threshing machine main shaft 1. There are multiple anti-grain-running roller brushes 2 on each toothed rod 3 arranged in a spiral. When the roller rotates during threshing, the anti-grain-running roller brushes 2 rotate simultaneously with the threshing machine main shaft 1. The anti-grain-running roller brushes 2 rub against the concave sieve 4 below to complete the cleaning, which can clean away the impurities generated during threshing. The impurities generated during threshing are due to the accumulation of impurities on the concave sieve, which clogs the concave sieve holes, affects the separation of grains, and causes the grains to be discharged with the straw, resulting in grain run-out. Therefore, the cleaning of the anti-grain-running roller brushes 2 can keep the internal gaps of the concave sieve 4 open at all times, and the threshed grains can also be smoothly discharged to the bottom of the concave sieve 4, solving the grain run-out problem during threshing. The positioning frame 71 is welded to the bottom of the rectangular iron mounting plate 81. The pre-drilled hole 72 on the rear side of the positioning frame 71 can be inserted and then bent out under the positioning frame 71. The first screw 74 and the second screw 76 can be manually turned to push the vertical first pressing plate 75 to press the bristle end of the anti-grain-running roller brush 2 against the lower end of the mounting plate 81. The horizontal second pressing plate 77 can press and smooth the bristles on the bent anti-grain-running roller brush 2. When the brush is too long or too short, the first screw 74 and the second screw 76 can be turned outwards, and the anti-grain-running roller brush 2 will no longer be subject to the pressing force. It can be manually inserted into the pre-drilled hole 72 a certain distance, or pulled out a certain distance, to adapt to the height inside the concave plate screen 4 without trimming the brush. Finally, the first screw 74 and the second screw 76 are screwed back to complete the fixation.

[0020] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A grain-avoiding roller brush for a thresher, comprising a thresher main shaft (1), a grain-avoiding roller brush (2), and toothed rods (3), wherein a plurality of said toothed rods (3) are fixedly installed inside the thresher main shaft (1), characterized in that: The anti-grain-running roller brush (2) is provided with an adjustable structure (7) for the length of the roller brush bristles. An installation iron plate (81) is movably connected above the anti-grain-running roller brush (2). An installation hole (82) is fixedly opened inside the installation iron plate (81). The outer walls of multiple installation iron plates (81) are movably connected to the outer side of the toothed rod (3).

2. The grain run-off preventing cylinder brush for a thresher according to claim 1, characterized in that: A concave sieve (4) is rotatably mounted on the outer side of the thresher main shaft (1). The upper part of the inner wall of the concave sieve (4) is rotatably connected to the lower end of the anti-grain-running roller brush (2). Multiple anti-grain-running roller brushes (2) are spirally distributed on the outer side of the toothed rod (3).

3. The grain run-off preventing cylinder brush for a thresher according to claim 2, characterized in that: The concave sieve (4) has a feed inlet (5) fixedly opened on one side of its top end, and a discharge outlet (6) fixedly opened on the other side of its top end. The feed inlet (5) and the discharge outlet (6) are connected to each other.

4. The grain run-off preventing cylinder brush for a thresher according to claim 1, characterized in that: The adjustable bristle length structure (7) of the roller brush includes a positioning frame (71) and a brush connector (73). The positioning frame (71) is fixedly installed on the upper outer side of the anti-grain-running roller brush (2). A reserved hole (72) is fixedly opened on the rear side of the positioning frame (71). A first screw (74) is threadedly connected to the lower rear side of the positioning frame (71). A first clamping plate (75) is rotatably connected to the top of the first screw (74). A second screw (76) is threadedly connected to the inner front side of the positioning frame (71). A second clamping plate (77) is rotatably connected to the front end of the second screw (76). The brush connector (73) is fixedly installed on the top of the anti-grain-running roller brush (2).

5. The grain run-off preventing cylinder brush for a thresher according to claim 4, characterized in that: The upper part of the first pressing plate (75) abuts against the lower part of the outer wall of the anti-grain-running roller brush (2), and one side of the second pressing plate (77) abuts against the side of the outer wall of the anti-grain-running roller brush (2).

6. The grain run-off preventing cylinder brush for a thresher according to claim 4, characterized in that: The top of the positioning frame (71) is fixedly installed at the bottom of the mounting plate (81).

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