Grain screening machine with dust collecting assembly

Abstract

The grain screening machine with the dust collecting assembly relates to the technical field of agricultural machinery and comprises a box body, a supporting table is fixedly installed on one side of the box body, a discharging opening is connected to one side of the box body in a penetrating mode, and a discharging plate is fixedly installed on the lower portion of the interior of the box body; meanwhile, a discharging groove is formed in the position, located on one side of the discharging plate, of the front face of the box body in a penetrating mode, the screening assembly is arranged inside and outside the box body, the collecting assembly is arranged outside the discharging opening, the movable hopper is arranged on the upper portion of the interior of the box body, a screening plate is arranged at the bottom of the movable hopper, and the discharging groove is formed in the position, located on one side of the movable hopper, of the box body in a penetrating mode. A discharging plate is fixedly mounted in the discharging groove; through the arrangement of the movable hopper, grains can be evenly distributed in the movable hopper in the screening process, accumulation of the grains is avoided, then the grain falling range can be enlarged, the grain impurity removing effect can be improved, and the grain screening efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, in particular to a grain screening machine with a dust collecting component. Background Art

[0002] After the crops are harvested, especially rice and wheat, the harvested grains are mixed with dust, weeds and shriveled grains. The impurities need to be removed in time before the impurity-free grains can be stored in the granary. Therefore, the grains need to be screened after harvest.

[0003] For example, a grain screening device with publication number CN112495798A separates grains from a grain straw mixture by allowing a sieve plate to bounce up and down in a screening frame. The grains fall under the action of gravity and flow through a second separation mechanism. The second separation mechanism generates wind force to remove grain husks mixed in the grains. The grains are screened by the reciprocating motion of the sieve plate. The grains are loaded through a conveying device during screening. After loading, the grains tend to accumulate on the sieve plate. The sieve plate can spread the accumulated grains left and right during the left and right movement, but the grains cannot be spread front and back, so that the falling range of the grains after screening is limited. When separation is used for impurity removal, the impurity removal effect of the grains cannot be guaranteed, and there are certain defects in use. Summary of the invention

[0004] The object of the present invention is to provide a grain screening machine with a dust collection assembly to solve the problem proposed in the above-mentioned background technology that grains are easily accumulated on the screen plate after being loaded, and the screen plate can spread the accumulated grains left and right during the left and right movement, but the grains cannot be spread front and back, so that the range of grain falling after screening is limited and the impurity removal effect of the grains cannot be guaranteed.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a grain screening machine with a dust collection assembly, comprising a box body, a support platform is fixedly installed on one side of the box body, a discharge port is connected through one side of the box body, and a discharge plate is fixedly installed at the lower part of the box body, and a discharge trough is opened through one side of the discharge plate on the front side of the box body; Also includes: Screening components are arranged inside and outside the box; A collecting component is arranged outside the discharge port; A movable bucket is arranged above the interior of the box body, a sieve plate is arranged at the bottom of the movable bucket, a discharge groove is penetrated through one side of the box body located at the movable bucket, and a discharge plate is fixedly installed inside the discharge groove, and a sliding groove is penetrated through one side of the top of the box body, and a funnel is slidably connected inside the sliding groove; A fixed plate is fixedly installed on one upper side of the inner part of the movable bucket, a fixed block is fixedly installed on one side of the top of the fixed plate, and a connecting rod is hinged on one side of the fixed block, and a connecting piece is symmetrically installed below one side of the funnel, and an end of the connecting rod away from the fixed block is hinged to the connecting piece, and a movable rod is fixedly installed on one side of the movable bucket, and the movable rod is slidably connected to the box body; The support blocks are symmetrically installed on the top of the box body on both sides of the sliding groove, and the interiors of the two support blocks are slidably connected to the positioning rods, and the two positioning rods are fixedly connected to the funnel. At the same time, guide rails are symmetrically installed on both sides of the movable bucket on the upper part of the interior of the box body, and the interiors of the two guide rails are slidably connected to the positioning blocks, and the two positioning blocks are fixedly connected to the movable bucket.

[0006] Preferably, a driving motor is fixedly mounted on one side of the top of the support platform, and a rotating shaft is fixedly mounted on the output end of the driving motor, and a U-shaped frame is rotatably connected to the outer side of the rotating shaft. The U-shaped frame is fixedly connected to the support platform, and a rotating rod is rotatably connected to the upper inner portion of the U-shaped frame.

[0007] By adopting the above technical solution, the rotation of the rotating shaft can be supported, thereby improving the stability of the rotation of the rotating shaft.

[0008] Preferably, a second bevel gear is fixedly installed on the outside of the rotating shaft below the rotating rod, and a first bevel gear is fixedly installed on the bottom of the rotating rod, and the first bevel gear is meshingly connected to the second bevel gear. At the same time, a support frame is symmetrically rotatably connected to one side of the outside of the rotating rod, and both support frames are fixedly connected to the box.

[0009] By adopting the above technical solution, the rotation of the rotating shaft can drive the rotating rod to rotate.

[0010] Preferably, a turntable is fixedly mounted on the top of the rotating rod, a column is fixedly mounted on one side of the top of the turntable, and a movable frame is fixedly mounted on one end of the movable rod away from the movable bucket, and the column is slidably connected to the movable frame.

[0011] By adopting the above technical solution, the rotation of the rotating rod can drive the movable bucket to move back and forth, so that the grains can be screened.

[0012] Preferably, a breathable shell is connected through one side of the box body located on the rotating shaft, and the rotating shaft is rotatably connected to the breathable shell, and a rotating fan blade is fixedly installed at one end of the rotating shaft.

[0013] By adopting the above technical solution, the rotation of the rotating shaft can drive the rotating fan blades to rotate, so that the grains can be blown away and the dust can be blown out.

[0014] Preferably, the collecting assembly comprises a breathable dust collecting bag sleeved on the outside of the discharge port, a foam plate is hinged on one side of the inside of the discharge port, and a plurality of limit rods are symmetrically hinged on the outside of the discharge port.

[0015] By adopting the above technical solution, the blown dust can be collected, and the backflow of dust can be avoided after the rotating fan blades stop rotating.

[0016] Preferably, the outside of the discharge port is located on one side of several limit rods, which are rotatably connected to a rotating rod, and one side of the outside of several rotating rods is sleeved with a telescopic spring, and one end of the telescopic spring is fixedly connected to the rotating rod, and at the same time, a movable block is fixedly installed on the other end of the telescopic spring, and the movable block is slidably connected to the rotating rod.

[0017] By adopting the above technical solution, it is convenient to disassemble the breathable dust bag, and then convenient to centrally clean the collected dust.

[0018] Preferably, barbs are symmetrically installed on one side of the plurality of limit rods close to the discharge port.

[0019] By adopting the above technical solution, the breathable dust bag can be fixed to prevent the breathable dust bag from falling off.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the grain screening machine with dust collection components is provided with screening components inside and outside the box body, so that the grains can be evenly distributed inside the movable bucket during the screening process, thereby avoiding the accumulation of grains, thereby expanding the grain dropping range, improving the grain impurity removal effect, and improving the grain screening efficiency; 1. Screening components are arranged inside and outside the box body, and the grains are loaded through the conveying equipment. The grains can be screened through the reciprocating motion of the screen plate on the movable bucket. If the grains are accumulated inside the movable bucket, the grains can be spread left and right by the movement of the movable bucket. The movable bucket drives the positioning block to slide in the guide rail for limiting during the movement. The movable bucket can drive the fixed block on the fixed plate to move during the movement, so that the connecting rod can be driven to move. After the connecting rod moves, it can be rotated, so that after the connecting rod rotates, the funnel is pulled to slide in the sliding groove through the connecting piece. When the funnel moves, it drives the positioning rod to slide on the supporting block to limit the movement of the funnel, and then the movable bucket is loaded through the funnel. When the movable bucket moves left and right, it can drive the funnel to move forward and backward, thereby avoiding the accumulation of grains on the movable bucket, expanding the grain dropping range, and improving the grain screening efficiency; 2. When screening the grains, the driving motor on the support platform is started to drive the rotating shaft to rotate on the U-shaped frame. The meshing of the first bevel gear and the second bevel gear can drive the rotating rod to rotate on the support frame, so that the turntable can be driven to rotate. After the turntable rotates, the column rod can be driven to rotate in a circle. While the column rod rotates in a circle, it can push the movable frame to move back and forth through the sliding connection with the movable frame. While the movable frame moves back and forth, the movable bucket can be driven to move back and forth through the movable rod, so that the materials can be screened, and the impurities screened in the grains can be discharged through the discharge plate. The rotation of the rotating shaft drives the rotating fan blades to rotate, so that the debris and dust in the screened grains can be blown out, and the dust is blown into the discharge port, so that the screening of the grains is convenient, and the grains can be removed; 3. A collecting assembly is provided on the outside of the discharge port, and the wind blown out by the rotating fan blades can drive the foam plate to rotate, so that dust can enter the interior of the breathable dust bag through the discharge port, and the dust is collected by the breathable dust bag. After the grain screening stops, the foam plate is perpendicular to the discharge port under the action of gravity to prevent dust backflow. When the dust inside the breathable dust bag is centrally cleaned, the movable block is moved to compress the telescopic spring, so that the movable block is no longer fitted with the limit rod, the rotating rod is rotated to stagger the movable block and the limit rod, and the limit rod is rotated to make the barb leave the breathable dust bag, so that the breathable dust bag can be removed for cleaning. When the breathable dust bag is fixed, the breathable dust bag is put on the outside of the discharge port, the limit rod is rotated to make the barb hook the breathable dust bag, the limit rod is limited by the movable block, and the dust can be centrally collected by the collecting assembly, and the dust is convenient to be concentrated, thereby improving convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the front structure of the present invention; Figure 2 It is a front cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the movable bucket of the present invention; Figure 4 This is a schematic diagram of the structure of the movable bucket in the operating state of the present invention; Figure 5 This is a structural schematic diagram of another operating state of the movable bucket of the present invention; Figure 6 This is a schematic diagram of the top view of the box structure of the present invention; Figure 7 It is a schematic diagram of the side structure of the movable bucket of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the turntable of the present invention; Fig. 9 For the present invention Figure 2 Schematic diagram of the enlarged structure of area A in the middle.

[0022] In the figure: 1, box body; 101, support platform; 102, discharge port; 103, discharge trough; 104, discharge plate; 2, screening component; 201, movable bucket; 202, screen plate; 203, discharge plate; 204, funnel; 205, fixed plate; 206, fixed block; 207, connecting rod; 208, connecting piece; 209, movable rod; 210, sliding groove; 211, supporting block; 212, positioning rod; 213, guide rail; 214, positioning block; 215, drive The motor; 216, the rotating shaft; 217, the U-shaped frame; 218, the first bevel gear; 219, the second bevel gear; 220, the rotating rod; 221, the supporting frame; 222, the turntable; 223, the column rod; 224, the movable frame; 225, the breathable shell; 226, the rotating fan blade; 3, the collecting component; 301, the breathable dust bag; 302, the foam board; 303, the limiting rod; 304, the barb; 305, the rotating rod; 306, the telescopic spring; 307, the movable block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-9 The present invention provides a technical solution: a grain screening machine with a dust collection assembly, comprising a box body 1, a support platform 101 is fixedly installed on one side of the box body 1, and a discharge port 102 is connected through one side of the box body 1, and a discharge plate 104 is fixedly installed at the lower part of the box body 1, and a discharge trough 103 is opened through the front side of the box body 1 on one side of the discharge plate 104; Also includes: The screening component 2 is arranged inside and outside the box 1; A movable bucket 201 is arranged on the upper part of the box body 1, a sieve plate 202 is arranged at the bottom of the movable bucket 201, and a discharge groove is penetrated through one side of the box body 1 located at the movable bucket 201, and a discharge plate 203 is fixedly installed inside the discharge groove, and a sliding groove 210 is penetrated through one side of the top of the box body 1, and a funnel 204 is slidably connected inside the sliding groove 210; A fixed plate 205 is fixedly installed on one side of the inside of the movable bucket 201, a fixed block 206 is fixedly installed on one side of the top of the fixed plate 205, and a connecting rod 207 is hinged on one side of the fixed block 206, and a connecting piece 208 is symmetrically installed below one side of the funnel 204, and one end of the connecting rod 207 away from the fixed block 206 is hinged to the connecting piece 208, and a movable rod 209 is fixedly installed on one side of the movable bucket 201, and the movable rod 209 is slidably connected to the box body 1; The support blocks 211 are symmetrically installed on the top of the box body 1 on both sides of the sliding groove 210, and the interiors of the two support blocks 211 are slidably connected to the positioning rods 212, and the two positioning rods 212 are fixedly connected to the funnel 204. At the same time, guide rails 213 are symmetrically installed on both sides of the movable bucket 201 above the interior of the box body 1, and the interiors of the two guide rails 213 are slidably connected to the positioning blocks 214, and the two positioning blocks 214 are fixedly connected to the movable bucket 201.

[0025] Embodiment 1: Figure 1-8 As shown, screening components 2 are arranged inside and outside the box body 1, and grains are loaded through conveying equipment. Grains can be screened by the reciprocating motion of the screen plate 202 on the movable bucket 201, and if grains are accumulated inside the movable bucket 201, the grains can be spread left and right by the movement of the movable bucket 201. The movable bucket 201 drives the positioning block 214 to slide in the guide rail 213 for limiting during the movement. The movable bucket 201 can drive the fixed block 206 on the fixed plate 205 to move during the movement, so that the connecting rod 207 can be driven to move, and the connecting rod 207 can be driven to move. After the connecting rod 207 moves, it can rotate, so that after the connecting rod 207 rotates, the funnel 204 is pulled to slide in the sliding groove 210 through the connecting piece 208. When the funnel 204 moves, it drives the positioning rod 212 to slide on the support block 211, thereby limiting the movement of the funnel 204, and then the movable bucket 201 is loaded with materials through the funnel 204. When the movable bucket 201 moves left and right, it can drive the funnel 204 to move forward and backward, thereby avoiding the accumulation of grains on the movable bucket 201, expanding the grain dropping range, and improving the grain screening efficiency.

[0026] A driving motor 215 is fixedly installed on one side of the top of the support platform 101, and a rotating shaft 216 is fixedly installed on the output end of the driving motor 215, and a U-shaped frame 217 is rotatably connected to the outer side of the rotating shaft 216. At the same time, the U-shaped frame 217 is fixedly connected to the support platform 101, and a rotating rod 220 is rotatably connected to the upper part of the U-shaped frame 217; A second bevel gear 219 is fixedly installed on the outside of the rotating shaft 216 and located below the rotating rod 220, and a first bevel gear 218 is fixedly installed on the bottom of the rotating rod 220, and the first bevel gear 218 is meshed and connected with the second bevel gear 219, and a support frame 221 is symmetrically rotatably connected to one side of the outside of the rotating rod 220, and the two support frames 221 are fixedly connected to the box body 1; A rotating disk 222 is fixedly installed on the top of the rotating rod 220, and a column 223 is fixedly installed on one side of the top of the rotating disk 222, and a movable frame 224 is fixedly installed on one end of the movable rod 209 away from the movable bucket 201, and the column 223 is slidably connected to the movable frame 224; A ventilation shell 225 is connected through one side of the housing 1 located at the rotating shaft 216 , and the rotating shaft 216 is rotatably connected to the ventilation shell 225 , and a rotating fan blade 226 is fixedly installed at one end of the rotating shaft 216 .

[0027] Embodiment 2: Figure 1-2 and Figure 8-9 As shown, when the grains are screened, the driving motor 215 on the support platform 101 is started to drive the rotating shaft 216 to rotate on the U-shaped frame 217, and the engagement of the first bevel gear 218 and the second bevel gear 219 can drive the rotating rod 220 to rotate on the support frame 221, so that the turntable 222 can be driven to rotate. After the turntable 222 rotates, the column rod 223 can be driven to rotate in a circle. While the column rod 223 rotates in a circle, it can push the movable frame 224 to move back and forth through the sliding connection with the movable frame 224. While the movable frame 224 moves back and forth, the movable bucket 201 can be driven to move back and forth through the movable rod 209, so that the materials can be screened, and the impurities screened in the grains can be discharged through the discharge plate 203, and the rotating shaft 216 rotates while driving the rotating fan blades 226 to rotate, so that the debris and dust in the screened grains can be blown out, so that the dust is blown into the discharge port 102, thereby facilitating the screening of the grains and removing impurities from the grains.

[0028] The collecting assembly 3 is arranged outside the discharge port 102; The collecting assembly 3 includes a breathable dust collecting bag 301 sleeved on the outside of the discharge port 102, and a foam plate 302 is hinged on one side of the inside of the discharge port 102, and a plurality of limit rods 303 are symmetrically hinged on the outside of the discharge port 102; The outside of the discharge port 102 is located on one side of a plurality of limit rods 303, and a rotating rod 305 is rotatably connected, and a telescopic spring 306 is sleeved on one side of the outside of the plurality of rotating rods 305, and one end of the telescopic spring 306 is fixedly connected to the rotating rod 305, and a movable block 307 is fixedly installed on the other end of the telescopic spring 306, and the movable block 307 is slidably connected to the rotating rod 305; Barbs 304 are symmetrically installed on one side of the plurality of limit rods 303 close to the discharge port 102 .

[0029] Embodiment 3: Figure 1-2 and Fig. 9 As shown, a collecting assembly is provided outside the discharge port 102, and the wind blown by the rotating fan blades 226 can blow the foam plate 302 to rotate, so that dust can enter the inside of the breathable dust bag 301 through the discharge port 102, and the dust is collected by the breathable dust bag 301. After the grain screening stops, the foam plate 302 is perpendicular to the discharge port 102 under the action of gravity to avoid dust backflow. When the dust inside the breathable dust bag 301 is cleaned up, the movable block 307 is moved to compress the telescopic spring 306, so that the movable block 307 is no longer in contact with the limit rod 303. The rotating rod 305 is rotated to make the movable block 307 and the limiting rod 303 be offset, and the limiting rod 303 is rotated to make the barb 304 leave the breathable dust collecting bag 301, so that the breathable dust collecting bag 301 can be removed for cleaning. When the breathable dust collecting bag 301 is fixed, the breathable dust collecting bag 301 is put on the outside of the discharge port 102, and the limiting rod 303 is rotated to make the barb 304 hook the breathable dust collecting bag 301. The limiting rod 303 is limited by the movable block 307, and the dust can be collected centrally through the collecting component 3, and the dust can be collected conveniently, thereby improving convenience.

[0030] Working principle: When using the grain screening machine with dust collection assembly, first, according to Figure 1-Figure 9As shown, when the grains are screened, the driving motor 215 on the support platform 101 is started to drive the rotating shaft 216 to rotate on the U-shaped frame 217, and the first bevel gear 218 and the second bevel gear 219 are engaged to drive the rotating rod 220 to rotate on the support frame 221, so that the rotating disk 222 can be driven to rotate. After the rotating disk 222 rotates, the column 223 can be driven to rotate in a circle. While the column 223 rotates in a circle, it can push the movable frame 224 to move back and forth through the sliding connection with the movable frame 224. While the movable frame 224 moves back and forth, the movable rod 223 can be driven to rotate in a circle through the sliding connection with the movable frame 224. 09 drives the movable bucket 201 to move back and forth, so that the material can be screened, and the impurities screened in the grains can be discharged through the discharge plate 203, and the rotating shaft 216 rotates while driving the rotating fan blade 226 to rotate. If the grains are accumulated inside the movable bucket 201, the grains can be spread left and right by the movement of the movable bucket 201, and the movable bucket 201 drives the positioning block 214 to slide in the guide rail 213 for limiting during the movement. The movable bucket 201 can drive the fixed block 206 on the fixed plate 205 to move during the movement, so that the connecting rod 207 can be driven to move. After the connecting rod 207 moves, it can rotate, so that after the connecting rod 207 rotates, the funnel 204 is pulled to slide in the sliding groove 210 through the connecting piece 208. When the funnel 204 moves, it drives the positioning rod 212 to slide on the supporting block 211, and limits the movement of the funnel 204, so that the movable bucket 201 is loaded through the funnel 204. When the movable bucket 201 moves left and right, it can drive the funnel 204 to move forward and backward. The wind blown by the rotating fan blades 226 can blow the foam board 302 to rotate, so that dust can enter the breathable dust collection bag 3 through the discharge port 102. 01, dust is collected inside the breathable dust bag 301, and after the grain screening stops, the foam board 302 is perpendicular to the discharge port 102 under the action of gravity to prevent dust backflow, and when the dust inside the breathable dust bag 301 is cleaned centrally, the movable block 307 is moved to compress the telescopic spring 306 so that the movable block 307 is no longer in contact with the limiting rod 303, and the rotating rod 305 is rotated to stagger the movable block 307 and the limiting rod 303, and the limiting rod 303 is rotated to make the barb 304 leave the breathable dust bag 301, so that the breathable dust bag 301 can be removed for cleaning.

[0031] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A grain screening machine with a dust collection assembly, comprising a box body (1), a support platform (101) being fixedly mounted on one side of the box body (1), a discharge port (102) being connected through one side of the box body (1), a discharge plate (104) being fixedly mounted at the lower part of the box body (1), and a discharge trough (103) being opened through the front side of the box body (1) on one side of the discharge plate (104); It is characterized in that Also includes: The screening components (2) are arranged inside and outside the box (1); A collecting assembly (3) arranged outside the discharge port (102); A movable bucket (201) is arranged above the interior of the box body (1), a sieve plate (202) is arranged at the bottom of the movable bucket (201), a material discharge groove is provided through one side of the box body (1) located at the movable bucket (201), and a material discharge plate (203) is fixedly installed inside the material discharge groove, and a sliding groove (210) is provided through one side of the top of the box body (1), and a funnel (204) is slidably connected inside the sliding groove (210); A fixed plate (205) is fixedly mounted on one upper side of the inner part of the movable bucket (201); a fixed block (206) is fixedly mounted on one side of the top of the fixed plate (205); a connecting rod (207) is hingedly mounted on one side of the fixed block (206); a connecting piece (208) is symmetrically mounted on one lower side of the funnel (204); an end of the connecting rod (207) away from the fixed block (206) is hingedly mounted to the connecting piece (208); a movable rod (209) is fixedly mounted on one side of the movable bucket (201); and the movable rod (209) is slidably connected to the box body (1); Support blocks (211) are symmetrically mounted on the top of the box body (1) and located on both sides of the sliding groove (210), and the interiors of the two support blocks (211) are slidably connected to positioning rods (212), and the two positioning rods (212) are fixedly connected to the funnel (204). At the same time, guide rails (213) are symmetrically mounted on the upper interior of the box body (1) and located on both sides of the movable bucket (201), and the interiors of the two guide rails (213) are slidably connected to positioning blocks (214), and the two positioning blocks (214) are fixedly connected to the movable bucket (201).

2. A grain screening machine with a dust collection assembly according to claim 1, characterized in that: A driving motor (215) is fixedly mounted on one side of the top of the support platform (101), and a rotating shaft (216) is fixedly mounted on the output end of the driving motor (215), and a U-shaped frame (217) is rotatably connected to an outer side of the rotating shaft (216), while the U-shaped frame (217) is fixedly connected to the support platform (101), and a rotating rod (220) is rotatably connected to the upper part of the interior of the U-shaped frame (217).

3. A grain screening machine with a dust collection assembly according to claim 2, characterized in that: A second bevel gear (219) is fixedly mounted on the outside of the rotating shaft (216) and located below the rotating rod (220), and a first bevel gear (218) is fixedly mounted on the bottom of the rotating rod (220), and the first bevel gear (218) is meshingly connected to the second bevel gear (219), and a support frame (221) is symmetrically rotatably connected to one side of the outside of the rotating rod (220), and both of the support frames (221) are fixedly connected to the box body (1).

4. A grain screening machine with a dust collection assembly according to claim 2, characterized in that: A rotating disk (222) is fixedly mounted on the top of the rotating rod (220), a column (223) is fixedly mounted on one side of the top of the rotating disk (222), and a movable frame (224) is fixedly mounted on one end of the movable rod (209) away from the movable bucket (201), and the column (223) is slidably connected to the movable frame (224).

5. A grain screening machine with a dust collection assembly according to claim 2, characterized in that: A ventilating shell (225) is connected to and penetrates the box body (1) at one side of the rotating shaft (216), and the rotating shaft (216) is rotatably connected to the ventilating shell (225), and a rotating fan blade (226) is fixedly mounted on one end of the rotating shaft (216).

6. A grain screening machine with a dust collection assembly according to claim 1, characterized in that: The collecting assembly (3) comprises a breathable dust collecting bag (301) sleeved on the outside of the discharge port (102), a foam plate (302) is hingedly connected to one side of the inside of the discharge port (102), and a plurality of limit rods (303) are symmetrically hingedly connected to the outside of the discharge port (102).

7. A grain screening machine with a dust collection assembly according to claim 6, characterized in that: The outside of the discharge port (102) is located on one side of a plurality of limit rods (303) and is rotatably connected to a rotating rod (305), and a telescopic spring (306) is sleeved on one side of the outside of the plurality of rotating rods (305), and one end of the telescopic spring (306) is fixedly connected to the rotating rod (305), and a movable block (307) is fixedly installed on the other end of the telescopic spring (306), and the movable block (307) is slidably connected to the rotating rod (305).

8. A grain screening machine with a dust collection assembly according to claim 6, characterized in that: Several of the limiting rods (303) are symmetrically provided with barbs (304) on one side close to the discharge port (102).

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