Agricultural equipment for grain screening

Abstract

The invention discloses agricultural equipment for grain screening, and relates to the technical field of grain screening, the agricultural equipment comprises a fixed seat, two groups of mounting plates are symmetrically mounted on the two sides of the fixed seat, dampers are fixedly mounted at the bottoms of the two groups of mounting plates, and supporting legs are fixedly mounted at the bottoms of the two groups of dampers; a sieve plate is arranged on the upper portion of the interior of the fixing seat, a discharging plate is fixedly installed at the bottom of the sieve plate, the positioning rods are symmetrically installed in the fixing seat and located on the two sides of the discharging plate, fixing rods are symmetrically installed between the two positioning rods in each group, and movable sleeves are slidably connected to the outer portions of the fixing rods. According to the grain screening device, when grains are screened, after the grains fall onto the screening plate, the stacked grains can be flattened, excessive stacking of the grains is avoided, blocking of the screening plate is avoided, the contact area of the grains and the screening plate can be enlarged, the screening efficiency and the screening quality are improved, and practicability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grain screening, in particular to agricultural machinery equipment used for grain screening. Background Art

[0002] "Cereals" covers a wide range, including rice, wheat, millet, soybeans and other grains. Cereals include rice, wheat, millet, soybeans, etc., mainly plant seeds and fruits. They are the traditional staple food of many Asian people.

[0003] For example, the announcement number CN212041388U is an agricultural machinery suitable for grain screening. It is equipped with a fixing mechanism and a screen mechanism. The screen mechanism is first plugged into two sets of side plates, and then the rotating block is rotated to rotate the screw rod, and the ball nut drives multiple sets of plug-in rods to move downward, so that the plug-in rods move into the plug-in holes, and finally the screen and the vibrating screen are fixed together, which is convenient for installation and removal of the screen and the vibrating screen. However, when screening the grain, the grain is fed to the top of the screen, and the grain is damp or agglomerated during storage. If the screen is too thick, the fluidity of the grains will be poor, and when screening oats and brown rice with rough surfaces, the fluidity of the grains will also be poor, and the grains will easily accumulate on the top of the screen. If accumulation occurs, the grains cannot fully contact the screen during the screening process, and it is easy to cause excessive pressure on the local part of the screen, which can easily cause the screen to be blocked. If the grains accumulate during screening, the accumulated grains on the top may not contact the screen, which will affect the quality of grain screening and the efficiency of grain screening, and there are certain usage defects.

[0004] Therefore, we propose an agricultural machinery equipment for grain screening to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide an agricultural machinery equipment for grain screening, so as to solve the problem proposed in the above background technology that when screening the grains, the grains are fed to the top of the screen. If the grains are damp or lumped during storage, the fluidity of the grains is poor. When screening oats and brown rice grains with rough surfaces, the fluidity of the grains is also poor, and the grains are prone to accumulate on the top of the screen. If accumulation occurs, the grains cannot fully contact the screen during the screening process, and it is easy to cause excessive pressure on the local part of the screen, which is easy to cause the screen to be blocked. Moreover, if the grains accumulate during screening, the accumulated grains on the top may not contact the screen, which will affect the quality of grain screening and the efficiency of grain screening.

[0006] To achieve the above object, the present invention provides the following technical solution: an agricultural machinery for grain screening, comprising a fixed seat, two sets of mounting plates are symmetrically installed on both sides of the fixed seat, and dampers are fixedly installed at the bottom of the two sets of mounting plates, and supporting legs are fixedly installed at the bottom of the two sets of dampers, and a sieve plate is arranged on the upper part of the fixed seat, and a discharge plate is fixedly installed at the bottom of the sieve plate; Also includes: The positioning rods are symmetrically installed inside the fixed seat and are located in two groups on both sides of the discharge plate. A fixed rod is symmetrically installed between the two positioning rods in each group, and a movable sleeve is slidably connected to the outside of the fixed rod, and the movable sleeve is fixedly connected to the discharge plate. At the same time, a telescopic spring is symmetrically provided on the outside of the fixed rod, and the two ends of the telescopic spring are respectively fixedly connected to the movable sleeve and the positioning rod. A driving motor is fixedly installed at the bottom center of the fixed seat, and the output end of the driving motor passes through the fixed seat and is fixedly installed with a cam. At the same time, a fixing frame is fixedly installed on one side of the bottom of the discharge plate, and one side of the fixing frame is rotatably connected to a roller, and the cam is rotatably connected to the roller; A material removal assembly is arranged on one side above the fixing seat, and the material removal assembly includes two mounting brackets; A dust removal component is arranged on the other side above the fixing base; The mounting frame is symmetrically mounted on one side of the top of the fixing base, a lower hopper is fixedly mounted between the two mounting frames, a shell is fixedly mounted on the lower interior of the lower hopper, a conical bar is fixedly mounted on the top of the shell, a rotating shaft is rotatably connected between the shell and the conical bar, and a rotating gear is fixedly mounted on one side of the outer side of the rotating shaft.

[0007] Preferably, a movable rod is slidably connected inside the shell, and the movable rod is slidably connected to the lower hopper, and a connecting rod is fixedly installed at one end of the movable rod, and the connecting rod is fixedly connected to the screen plate, and a rack is fixedly installed on the outside of the movable rod on one side of the rotating gear, and the rack is meshingly connected to the rotating gear.

[0008] By adopting the above technical solution, the movement of the movable rod can drive the rotating shaft to rotate.

[0009] Preferably, the bottom end of the rotating shaft passes through the shell and is fixedly installed with a rotating part, and push plates are symmetrically arranged at the lower part of the lower hopper, and the rotating part is slidably connected to the two push plates, and at the same time, support rods are fixedly installed above the side away from each other of the two push plates, and the support rods are slidably connected to the lower hopper, and a return spring is sleeved on one side of the outside of the support rod, and one end of the return spring is fixedly connected to the lower hopper, and the other end of the return spring is fixedly connected to the support rod.

[0010] By adopting the above technical solution, the push plate can continuously move back and forth during the screening process, so that the accumulated grains can be flattened.

[0011] Preferably, a winding wheel is fixedly mounted on the top of the rotating shaft, and a through groove is penetrated through one side of the lower hopper.

[0012] By adopting the above technical solution, the pull rope can be pulled back and forth by the rotating shaft.

[0013] Preferably, the dust removal assembly includes a cylinder arranged on the other side above the fixed seat, and a mounting tube is opened through the upper side of one side of the cylinder, and a pull rope is fixedly installed on one end of the mounting tube, and the end of the pull rope away from the cylinder passes through the through groove and is fixedly connected to the winding wheel, and a fan is fixedly installed inside the cylinder.

[0014] By adopting the above technical solution, the cylinder can be pulled to rotate back and forth during screening, thereby expanding the air extraction range of the cylinder.

[0015] Preferably, a column is symmetrically installed on the other side of the top of the fixed seat, and a mounting rod is fixedly installed on the upper side of the two columns close to each other, and the two mounting rods are rotatably connected to the cylinder. At the same time, a torsion spring is sleeved on the outer side of the two mounting rods close to the cylinder, and one end of the torsion spring is fixedly connected to the cylinder, and a mounting block is fixedly installed on the other end of the torsion spring, and the mounting block is fixedly connected to the mounting rod.

[0016] By adopting the above technical solution, the cylinder can be supported and reset after the cylinder is rotated.

[0017] Preferably, positioning blocks are symmetrically installed on one side of the lower interior of the cylinder, and a rotating rod is rotatably connected to the inside of the two positioning blocks, and a first pulley is fixedly installed on one side of the outside of the fan output end, and a second pulley is fixedly installed on one end of the rotating rod, and the first pulley is rotatably connected to the second pulley through a belt, and an air guide cover is provided below the cylinder, and a driving gear is fixedly installed on the bottom end of the rotating rod, and an inner gear ring is fixedly installed on the upper interior of the air guide cover, and the driving gear is meshingly connected to the inner gear ring.

[0018] By adopting the above technical solution, the air guide cover can be continuously rotated during the reciprocating swing of the cylinder, and the rotation of the air guide cover can change the range of air entering, thereby further improving the dust removal range.

[0019] Preferably, a fixing ring is fixedly mounted on the top of the air guide cover, and an annular groove is provided on the bottom of the cylinder, and the fixing ring is slidably connected to the annular groove.

[0020] By adopting the above technical solution, the rotation of the air guide cover can be supported and the stability of the rotation can be improved.

[0021] Compared with the prior art, the present invention has the following beneficial effects: (1) The agricultural machinery for grain screening is provided with a material discharge assembly on one side above the fixed seat, so that when the grain is screened, after the grain material falls on the screen plate, the accumulated grain can be flattened to avoid excessive accumulation of grain and blockage of the screen plate, and the contact area between the grain and the screen plate can be expanded, thereby improving the screening efficiency and screening quality and improving the practicality; (2) A feeding assembly is arranged on one side above the fixed seat. When the grain is screened, the grain falls on the top of the screen plate through the feeding hopper. The driving motor is started to drive the cam to rotate. The rotation of the cam can drive the roller to rotate and move the roller, so that the feeding plate and the screen plate can move. After the feeding plate moves, it can drive the movable sleeve to slide on the fixed rod, so that the telescopic spring can be compressed or stretched. After the cam rotates one circle, the feeding hopper and the screen plate can be reset under the action of the telescopic spring. The screen plate can be reciprocated by the continuous rotation of the cam, so that the screened impurities such as straw and leather can be discharged through the screen plate, and the grain can be discharged through the feeding plate. During the reciprocating movement of the screen plate, the movable rod can be driven to reciprocate by the connecting rod. After the movable rod slides on the feeding hopper and the shell, it can drive the rack to move. After the rack moves, it can drive the rotating shaft to rotate through the meshing rotating gear, so that the rotating shaft can be driven to rotate reciprocally while screening the grains. After the rotating shaft rotates, it can drive the rotating part to rotate. After the rotating part rotates, it can push the two pushers away from each other. After the push plate moves, it drives the support rod to slide on the lower hopper and stretches the reset spring. The grains fall on the sieve plate through the lower hopper. The push plate moves to both sides and can push the accumulated grains to both sides of the top of the sieve plate to avoid excessive accumulation of grains and affect the screening efficiency of the grains. Through the lowering component, when screening the grains, after the grain upper material falls on the sieve plate, the accumulated grains can be flattened to avoid excessive accumulation of grains and blockage of the sieve plate, and the contact area between the grains and the sieve plate can be expanded, thereby improving the screening efficiency and screening quality and improving the practicality. (3) Grains are prone to generate dust during screening. Start the fan inside the cylinder and put the dust bag on the outside of the installation tube. The fan can draw the generated dust into the cylinder and then collect it through the dust bag. The reciprocating rotation of the rotating shaft can drive the reel to rotate reciprocatingly, and then the pull rope can be pulled to move. After the pull rope moves, it can pull the cylinder to rotate on the installation rod and drive the torsion spring to deform. After the rotating shaft rotates and resets, the cylinder can be reset under the action of the torsion spring, and then the cylinder can be pulled to reciprocate while screening, which can expand the range of air extraction by the cylinder and improve the dust removal effect. (4) When the fan is running, the cooperation between the first pulley and the second pulley can drive the rotating rod to rotate on the positioning block. After the rotating rod rotates, the cooperation between the driving gear and the inner gear ring on the wind guide cover can drive the wind guide cover to rotate. When the wind guide cover rotates, it drives the fixed ring to slide on the annular groove at the bottom of the cylinder, so as to support the rotation of the wind guide cover, so that the wind guide cover can continuously rotate during the reciprocating swing of the cylinder. The rotation of the wind guide cover can change the range of air entry, thereby further increasing the range of dust removal, further reducing the dust generated by grain screening, and improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic structural diagram of the present invention from another perspective.

[0024] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the fixing seat of the present invention.

[0025] Figure 4 It is a schematic diagram of the three-dimensional cross-sectional structure of the lower hopper of the present invention.

[0026] Figure 5 It is a schematic diagram of the structure of the rotating shaft in the rotating state of the present invention.

[0027] Figure 6 It is a structural schematic diagram of another viewing angle of the rotating shaft of the present invention.

[0028] Figure 7 For the present invention Figure 3 Schematic diagram of the enlarged structure of area A in the middle.

[0029] Figure 8 It is a schematic diagram of the three-dimensional cross-sectional structure of the cylinder of the present invention.

[0030] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure of area B in the middle.

[0031] In the figure: 1, fixed seat; 1011, mounting plate; 1012, damper; 1013, supporting leg; 101, screen plate; 102, discharge plate; 103, positioning rod; 104, fixed rod; 105, movable sleeve; 106, telescopic spring; 107, driving motor; 108, cam; 109, fixed frame; 110, roller; 2, unloading assembly; 201, mounting frame; 202, unloading hopper; 203, shell; 204, tapered bar; 205, rotating shaft; 2051, rotating member; 206, rotating gear; 207, movable rod; 208, connecting rod Connecting rod; 209, rack; 210, push plate; 211, support rod; 212, return spring; 213, take-up wheel; 214, through slot; 3, dust removal assembly; 301, cylinder; 302, mounting tube; 303, pull rope; 304, column; 305, mounting rod; 306, torsion spring; 307, mounting block; 308, fan; 309, positioning block; 310, rotating rod; 311, first pulley; 312, second pulley; 313, wind guide cover; 314, driving gear; 315, inner gear ring; 316, fixing ring; 317, annular groove. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figure 1-Figure 9 The present invention provides a technical solution: an agricultural machinery for grain screening, comprising a fixed seat 1, two sets of mounting plates 1011 are symmetrically mounted on both sides of the fixed seat 1, and dampers 1012 are fixedly mounted on the bottoms of the two sets of mounting plates 1011, and supporting legs 1013 are fixedly mounted on the bottoms of the two sets of dampers 1012, and a sieve plate 101 is arranged on the upper part of the fixed seat 1, and a discharge plate 102 is fixedly mounted on the bottom of the sieve plate 101; Also includes: The positioning rods 103 are symmetrically installed inside the fixed seat 1 and are located on both sides of the discharge plate 102 in two groups. A fixed rod 104 is symmetrically installed between each group of two positioning rods 103, and a movable sleeve 105 is slidably connected to the outside of the fixed rod 104, and the movable sleeve 105 is fixedly connected to the discharge plate 102. At the same time, a telescopic spring 106 is symmetrically sleeved on the outside of the fixed rod 104, and the two ends of the telescopic spring 106 are respectively fixedly connected to the movable sleeve 105 and the positioning rod 103, and a driving motor 107 is fixedly installed at the bottom center of the fixed seat 1, and the output end of the driving motor 107 passes through the fixed seat 1 and is fixedly installed with a cam 108, and a fixing frame 109 is fixedly installed on one side of the bottom of the discharge plate 102, and a roller 110 is rotatably connected to one side of the fixing frame 109, and the cam 108 is rotatably connected to the roller 110; The material removal assembly 2 is arranged on one side above the fixing seat 1, and the material removal assembly 2 includes two mounting frames 201; The mounting frame 201 is symmetrically mounted on one side of the top of the fixing base 1, a lower hopper 202 is fixedly mounted between the two mounting frames 201, a shell 203 is fixedly mounted below the lower hopper 202, and a conical bar 204 is fixedly mounted on the top of the shell 203, and a rotating shaft 205 is rotatably connected to the shell 203 and the conical bar 204, and a rotating gear 206 is fixedly mounted on one side of the outer side of the rotating shaft 205; A movable rod 207 is slidably connected inside the housing 203, and the movable rod 207 is slidably connected to the lower hopper 202, and a connecting rod 208 is fixedly installed at one end of the movable rod 207, and the connecting rod 208 is fixedly connected to the sieve plate 101, and a rack 209 is fixedly installed on one side of the rotating gear 206 outside the movable rod 207, and the rack 209 is meshed and connected with the rotating gear 206; The bottom end of the rotating shaft 205 passes through the shell 203 and is fixedly installed with a rotating part 2051, and push plates 210 are symmetrically arranged at the lower part of the lower hopper 202, and the rotating part 2051 is slidably connected to the two push plates 210, and at the same time, support rods 211 are fixedly installed on the upper side of the two push plates 210 that are away from each other, and the support rod 211 is slidably connected to the lower hopper 202, and a return spring 212 is sleeved on one side of the outside of the support rod 211, and one end of the return spring 212 is fixedly connected to the lower hopper 202, and the other end of the return spring 212 is fixedly connected to the support rod 211.

[0034] Embodiment 1: Figure 1-Figure 6As shown, a feeding assembly 2 is arranged on one side above the fixing seat 1. When the grains are screened, the grains fall on the top of the sieve plate 101 through the feeding hopper 202. The driving motor 107 is started to drive the cam 108 to rotate. The rotation of the cam 108 can drive the roller 110 to rotate, and can drive the roller 110 to move, so that the discharge plate 102 and the sieve plate 101 move. After the discharge plate 102 moves, it can drive the movable sleeve 105 to slide on the fixing rod 104, so that the telescopic spring 106 can be compressed or stretched, and the cam After 108 rotates one circle, the discharging plate 102 and the sieve plate 101 can be reset under the action of the telescopic spring 106. The cam 108 continuously rotates to make the sieve plate 101 move back and forth, so that the impurities such as straw and leather that have been screened can be discharged through the sieve plate 101, and the grain can be discharged through the discharging plate 102. During the reciprocating movement, the sieve plate 101 can drive the movable rod 207 to reciprocate through the connecting rod 208. The movable rod 207 moves between the lower hopper 202 and the sliding on the shell 203. After the rack 209 moves, the rack 209 can drive the rotating shaft 205 to rotate by meshing with the rotating gear 206, so that the rotating shaft 205 can be driven to rotate back and forth while screening the grains. After the rotating shaft 205 rotates, the rotating member 2051 can be driven to rotate. After the rotating member 2051 rotates, the two push plates 210 can be pushed away from each other. After the push plate 210 moves, it drives the support rod 211 to slide on the lower hopper 202, and the reset spring 212 can be stretched, and the grains pass through the lower hopper 202. After the grains fall on the sieve plate 101, the push plate 210 moves to both sides, and the accumulated grains can be pushed to both sides of the top of the sieve plate 101 to avoid excessive grain accumulation and affect the grain screening efficiency. Through the unloading component 2, when the grains are screened, after the grains fall on the sieve plate 101, the accumulated grains can be flattened to avoid excessive grain accumulation and blockage of the sieve plate 101, and the contact area between the grains and the sieve plate 101 can be expanded, thereby improving the screening efficiency and screening quality, and improving the practicability.

[0035] A reel 213 is fixedly mounted on the top of the rotating shaft 205, and a through slot 214 is formed through one side of the lower hopper 202; The dust removal component 3 is arranged on the other side above the fixing base 1; The dust removal assembly 3 includes a cylinder 301 disposed on the other side above the fixing seat 1, and a mounting tube 302 is provided through the top of one side of the cylinder 301, and a pull rope 303 is fixedly installed at one end of the mounting tube 302, and the end of the pull rope 303 away from the cylinder 301 passes through the through slot 214 and is fixedly connected to the winding wheel 213, and a fan 308 is fixedly installed inside the cylinder 301; A column 304 is symmetrically installed on the other side of the top of the fixed seat 1, and a mounting rod 305 is fixedly installed on the upper side of the two columns 304 that are close to each other, and the two mounting rods 305 are rotatably connected to the cylinder 301. At the same time, a torsion spring 306 is sleeved on the outer side of the two mounting rods 305 close to the cylinder 301, and one end of the torsion spring 306 is fixedly connected to the cylinder 301, and a mounting block 307 is fixedly installed on the other end of the torsion spring 306, and the mounting block 307 is fixedly connected to the mounting rod 305.

[0036] Embodiment 2: Figure 2 and Figure 4-Figure 8 As shown, grains are prone to generate dust during the screening process. The fan 308 inside the cylinder 301 is started, and the dust bag is mounted on the outside of the mounting tube 302. The fan 308 can draw the generated dust into the cylinder 301, and then collect it through the dust bag. Due to the reciprocating rotation of the rotating shaft 205, the winding wheel 213 can be driven to reciprocate, and then the pull rope 303 can be pulled to move. After the pull rope 303 moves, it can pull the cylinder 301 to rotate on the mounting rod 305, and can drive the torsion spring 306 to deform. After the rotating shaft 205 rotates and resets, the cylinder 301 can be reset under the action of the torsion spring 306, and then the cylinder 301 can be pulled to reciprocate during screening, which can expand the air extraction range of the cylinder 301 and improve the dust removal effect.

[0037] A positioning block 309 is symmetrically installed on one side of the lower interior of the cylinder 301, and a rotating rod 310 is rotatably connected to the interior of the two positioning blocks 309, and a first pulley 311 is fixedly installed on one side of the outer output end of the fan 308, and a second pulley 312 is fixedly installed on one end of the rotating rod 310, and the first pulley 311 is rotatably connected to the second pulley 312 through a belt, and an air guide cover 313 is arranged below the cylinder 301, and a driving gear 314 is fixedly installed on the bottom end of the rotating rod 310, and an inner gear ring 315 is fixedly installed on the upper interior of the air guide cover 313, and the driving gear 314 is meshedly connected with the inner gear ring 315; A fixing ring 316 is fixedly mounted on the top of the air guide cover 313 , and an annular groove 317 is formed at the bottom of the cylinder 301 , and the fixing ring 316 is slidably connected to the annular groove 317 .

[0038] Embodiment 3: Figure 8-Figure 9As shown, the fan 308 drives the rotating rod 310 to rotate on the positioning block 309 through the cooperation of the first pulley 311 and the second pulley 312 while running. After the rotating rod 310 rotates, the cooperation of the driving gear 314 and the inner gear ring 315 on the wind guide cover 313 can drive the wind guide cover 313 to rotate. When the wind guide cover 313 rotates, it drives the fixing ring 316 to slide on the annular groove 317 at the bottom of the cylinder 301, so as to support the rotation of the wind guide cover 313, so that the wind guide cover 313 can continuously rotate during the reciprocating swing of the cylinder 301. The rotation of the wind guide cover 313 can change the range of air entry, thereby further improving the range of dust removal, further reducing the dust generated by grain screening, and improving practicality.

[0039] Working principle: When using this agricultural machinery for grain screening, first, according to Figure 1-Figure 9 As shown, when the grains are screened, the grains fall on the top of the sieve plate 101 through the lower hopper 202, and the driving motor 107 is started to drive the cam 108 to rotate. The rotation of the cam 108 can drive the roller 110 to rotate, and can drive the roller 110 to move, so that the discharge plate 102 and the sieve plate 101 move. After the discharge plate 102 moves, it can drive the movable sleeve 105 to slide on the fixed rod 104, so that the telescopic spring 106 can be compressed or stretched. After the cam 108 rotates one circle, the discharge plate 102 and the sieve plate 101 can be reset under the action of the telescopic spring 106. The cam 108 continuously rotates to make the sieve plate 101 reciprocate, so that the grains can be screened, so that the screened impurities such as straw and leather are discharged through the sieve plate 101, and the grains are discharged through the discharge plate 102. During the reciprocating movement of the sieve plate 101, the The connecting rod 208 drives the movable rod 207 to move back and forth. After the movable rod 207 moves and slides on the lower hopper 202 and the shell 203, it can drive the rack 209 to move. After the rack 209 moves, it can drive the rotating shaft 205 to rotate by meshing with the rotating gear 206, so that the rotating shaft 205 can be driven to rotate back and forth while screening the grains. After the rotating shaft 205 rotates, it can drive the rotating member 2051 to rotate. After the rotating member 2051 rotates, it can push the two push plates 210 away from each other. After the push plate 210 moves, it drives the support rod 211 to slide on the lower hopper 202, and the reset spring 212 can be stretched. The grains fall onto the sieve plate 101 through the lower hopper 202. The push plate 210 moves to both sides, and the accumulated grains can be pushed to both sides of the top of the sieve plate 101 to avoid excessive grain accumulation and affect the grain screening efficiency. Grains are prone to generate dust during the screening process. The fan 308 inside the cylinder 301 is started, and the dust bag is mounted on the outside of the mounting tube 302. The fan 308 can draw the generated dust into the cylinder 301, and then collect it through the dust bag. Due to the reciprocating rotation of the rotating shaft 205, the reel 213 can be driven to reciprocate, and then the pull rope 303 can be pulled to move. After the pull rope 303 moves, it can pull the cylinder 301 to rotate on the mounting rod 305, and can drive the torsion spring 306 to deform. After the rotating shaft 205 rotates and resets, the cylinder 301 can be reset under the action of the torsion spring 306, and then the cylinder 301 can be pulled to reciprocate during screening, which can expand the cylinder 301 to As for the air extraction range, the fan 308 drives the rotating rod 310 to rotate on the positioning block 309 through the cooperation of the first pulley 311 and the second pulley 312 while running. After the rotating rod 310 rotates, the cooperation of the driving gear 314 and the inner gear ring 315 on the air guide cover 313 can drive the air guide cover 313 to rotate. When the air guide cover 313 rotates, it drives the fixing ring 316 to slide on the annular groove 317 at the bottom of the cylinder 301, so as to support the rotation of the air guide cover 313, so that the air guide cover 313 can continuously rotate during the reciprocating swing of the cylinder 301. The rotation of the air guide cover 313 can change the range of air entry, thereby further improving the range of dust removal and further reducing the dust generated by grain screening.

[0040] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0041] 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. An agricultural machine for grain screening, comprising a fixed seat (1), two groups of mounting plates (1011) being symmetrically mounted on both sides of the fixed seat (1), dampers (1012) being fixedly mounted on the bottoms of the two groups of mounting plates (1011), and supporting legs (1013) being fixedly mounted on the bottoms of the two groups of dampers (1012), a sieve plate (101) being arranged on the upper part of the fixed seat (1), and a discharge plate (102) being fixedly mounted on the bottom of the sieve plate (101); It is characterized in that Also includes: The positioning rods (103) are symmetrically mounted inside the fixed seat (1) and located on both sides of the discharge plate (102) in two groups. A fixing rod (104) is symmetrically mounted between the two positioning rods (103) in each group. The fixing rods (104) are externally slidably connected to a movable sleeve (105), and the movable sleeve (105) is fixedly connected to the discharge plate (102). At the same time, the external symmetrical sleeves of the fixing rods (104) are provided with telescopic springs (106), and the two ends of the telescopic springs (106) are respectively connected to the movable sleeves (105). The movable sleeve (105) and the positioning rod (103) are fixedly connected, and a driving motor (107) is fixedly installed at the bottom center of the fixed seat (1), and the output end of the driving motor (107) passes through the fixed seat (1) and is fixedly installed with a cam (108), and at the same time, a fixing frame (109) is fixedly installed on one side of the bottom of the discharge plate (102), and a roller (110) is rotatably connected to one side of the fixing frame (109), and the cam (108) is rotatably connected to the roller (110); A material removal assembly (2) is arranged on one side above the fixing seat (1), wherein the material removal assembly (2) comprises two mounting frames (201); A dust removal component (3) is arranged on the other side above the fixing base (1); The mounting frames (201) are symmetrically mounted on one side of the top of the fixing base (1); a lower hopper (202) is fixedly mounted between the two mounting frames (201); a shell (203) is fixedly mounted below the lower hopper (202); a conical bar (204) is fixedly mounted on the top of the shell (203); a rotating shaft (205) is rotatably connected between the shell (203) and the conical bar (204); and a rotating gear (206) is fixedly mounted on one side of the outer side of the rotating shaft (205).

2. The agricultural machinery for grain screening according to claim 1, characterized in that: A movable rod (207) is slidably connected inside the shell (203), and the movable rod (207) is slidably connected to the lower hopper (202), and a connecting rod (208) is fixedly installed at one end of the movable rod (207), and the connecting rod (208) is fixedly connected to the screen plate (101), and a rack (209) is fixedly installed on the outside of the movable rod (207) at one side of the rotating gear (206), and the rack (209) is meshingly connected to the rotating gear (206).

3. The agricultural machinery for grain screening according to claim 1, characterized in that: The bottom end of the rotating shaft (205) passes through the shell (203) and is fixedly mounted with a rotating member (2051), and push plates (210) are symmetrically arranged at the lower part of the lower hopper (202), and the rotating member (2051) is slidably connected to the two push plates (210), and a support rod (211) is fixedly mounted above the side away from each other of the two push plates (210), and the support rod (211) is slidably connected to the lower hopper (202), and a return spring (212) is sleeved on one side of the outer side of the support rod (211), and one end of the return spring (212) is fixedly connected to the lower hopper (202), and the other end of the return spring (212) is fixedly connected to the support rod (211).

4. The agricultural machinery for grain screening according to claim 1, characterized in that: A winding wheel (213) is fixedly mounted on the top of the rotating shaft (205), and a through slot (214) is provided through one side of the lower hopper (202).

5. The agricultural machinery for grain screening according to claim 4, characterized in that: The dust removal assembly (3) comprises a cylinder (301) arranged on the other side above the fixing seat (1), and a mounting tube (302) is provided through the top of one side of the cylinder (301), and a pull rope (303) is fixedly installed on one end of the mounting tube (302), and the end of the pull rope (303) away from the cylinder (301) passes through the through slot (214) and is fixedly connected to the winding wheel (213), and a fan (308) is fixedly installed inside the cylinder (301).

6. The agricultural machinery for grain screening according to claim 1, characterized in that: A column (304) is symmetrically mounted on the other side of the top of the fixing seat (1), and a mounting rod (305) is fixedly mounted above the side where the two columns (304) are close to each other, and the two mounting rods (305) are rotatably connected to the cylinder (301), and a torsion spring (306) is sleeved on the side of the outside of the two mounting rods (305) close to the cylinder (301), and one end of the torsion spring (306) is fixedly connected to the cylinder (301), and a mounting block (307) is fixedly mounted on the other end of the torsion spring (306), and the mounting block (307) is fixedly connected to the mounting rod (305).

7. The agricultural machinery for grain screening according to claim 5, characterized in that: A positioning block (309) is symmetrically mounted on one side of the lower interior of the cylinder (301), and a rotating rod (310) is rotatably connected to the interior of the two positioning blocks (309), and a first pulley (311) is fixedly mounted on one side of the outer output end of the fan (308), and a second pulley (312) is fixedly mounted on one end of the rotating rod (310), and the first pulley (311) is rotatably connected to the second pulley (312) via a belt, and an air guide cover (313) is arranged below the cylinder (301), and a driving gear (314) is fixedly mounted on the bottom end of the rotating rod (310), and an inner gear ring (315) is fixedly mounted on the upper interior of the air guide cover (313), and the driving gear (314) is meshingly connected to the inner gear ring (315).

8. The agricultural machinery for grain screening according to claim 7, characterized in that: A fixing ring (316) is fixedly mounted on the top of the air guide cover (313), and an annular groove (317) is provided on the bottom of the cylinder (301), and the fixing ring (316) is slidably connected to the annular groove (317).

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