Automatic alfalfa screening and threshing device

Abstract

The invention provides an automatic alfalfa screening and threshing device, belongs to the technical field of screening and threshing, and solves the technical problems of easy blockage, poor threshing effect and the like in the existing screening process. The automatic alfalfa screening and threshing device comprises a movable rack and a shell, a feeding hopper is fixed to the upper side of the shell, a primary screening assembly is arranged in the shell, a stirring cage assembly is arranged on the movable rack and located below the shell, and a secondary screening assembly and a re-threshing assembly are arranged on the movable rack and located below the shell. The second-stage screening assembly is located below the stirring cage assembly, the third-stage screening assembly is arranged at the right end of the second-stage screening assembly, the discharging end of the primary screening assembly is located above the third-stage screening assembly, the upper end of the re-threshing assembly penetrates through the side wall of the shell and is located above the stirring cage assembly, and the lower end of the re-threshing assembly is located on the left side of the second-stage screening assembly. The threshing device has the advantages that damp chippings are prevented from blocking the screening assembly, the load of equipment is reduced, and the threshing efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of screening and threshing, and relates to a screening and threshing device, in particular to an automatic screening and threshing device for alfalfa. Background Art

[0002] Screening and threshing are critical steps in the production and processing of alfalfa. Currently, most traditional equipment uses a single threshing and screening method, which is unable to effectively separate impurities of varying sizes and shapes from alfalfa seeds, resulting in inconsistent product quality. Furthermore, traditional equipment has poor adaptability to the material and is prone to clogging when alfalfa has a high moisture content or when the material volume is large, seriously impacting production progress. Furthermore, the threshing process of existing equipment often utilizes a rigid friction method, which makes alfalfa seeds susceptible to damage during the threshing process.

[0003] Furthermore, the high-moisture content of alfalfa easily sticks to and accumulates on the surface of the threshing drum, and the wet debris quickly clogs the screen. This not only severely reduces threshing efficiency but also dramatically increases the operating load of the equipment, risking motor burnout and equipment damage, significantly impacting production. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose an automatic screening and threshing device for alfalfa. The technical problem to be solved by the invention is: how to prevent wet debris from clogging the screening component, reduce the load of the equipment, and improve the threshing efficiency.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An automatic screening and threshing device for alfalfa comprises a mobile frame and a shell, wherein the shell is fixed to the upper end of the mobile frame, a feed hopper is fixed on the upper side of the shell, a primary screening component is arranged inside the shell, a stirring cage component is arranged on the mobile frame, the stirring cage component is located below the shell, a secondary screening component and a re-threshing component are arranged on the mobile frame, the secondary screening component is located below the stirring cage component, and a tertiary screening component is provided at the right end of the secondary screening component, the discharge end of the primary screening component is located above the tertiary screening component, the upper end of the re-threshing component passes through the side wall of the shell and is located above the stirring cage component, and the lower end of the re-threshing component is located on the left side of the secondary screening component, the primary screening component comprises a screening cylinder, and a first motor is fixed on the shell. A driving shaft is fixed to the output shaft end of the first motor, and the driving shaft is fixedly connected to the screening drum. A discharge port is opened at the left end of the screening drum, and a discharge cover is rotatably connected to the outer periphery of the screening drum. The discharge cover is connected to the stirring cage assembly through a discharge pipe. The right end of the screening drum is rotatably connected to the feed cover, and the upper end of the feed cover is connected to the feed hopper through a feed pipe. The interior of the outer shell is rotatably connected to a dredging cylinder, and a number of dredging rods are slidably connected to the dredging cylinder. The dredging rods are corresponding to the screening holes of the screening drum, and a first spring is arranged between the dredging rods and the dredging cylinder. A driving assembly is arranged inside the conveying cylinder, and a collection seat located below the screening drum is fixed inside the outer shell, and a collection pipe is fixed to the lower end of the collection seat, and the other end of the collection pipe is located above the three-stage screening assembly.

[0007] The working principle of the present invention is: when working, the alfalfa material first enters the feed pipe in the outer shell through the feed hopper, and then enters the screening cylinder through the feed cover, and the drive shaft is driven by the first motor to rotate, and the drive shaft drives the screening cylinder to rotate, and the alfalfa material just entering the device is preliminarily screened, and the easily separated alfalfa seeds are separated. The separated alfalfa seeds fall onto the collecting seat, and then directly reach the three-stage screening component through the collecting pipe for three-stage screening, and are directly collected. The alfalfa material after the preliminary screening falls into the stirring cage component below through the discharge cover and the discharge pipe, and the stirring cage component threshes the material and separates the alfalfa seeds from the seed pods. The separated seeds and seed pods fall to the top of the secondary screening component under the action of gravity, and the secondary screening component performs a second screening on the material. The threshed alfalfa seeds are screened out and enter the three-stage screening component, and are collected after the three-stage screening. The incompletely threshed alfalfa materials enter the re-threshing component, are lifted to the top of the stirring cage component by the re-threshing component, and enter the stirring cage component again for re-threshing and participate in the screening process again. During the process, the threshed seed pods will enter the discharge component, and the discharge component will discharge the threshed alfalfa seed pods to complete the entire alfalfa automatic screening and threshing process. With the setting of this structure, while the screening cylinder rotates, the drive component will drive the dredging rod to move, and cooperate with the first spring to make the dredging rod reciprocate and extend, so that the dredging rod can dredge the screening hole of the screening cylinder to prevent the alfalfa material from clogging the screening cylinder, thereby improving the work efficiency and ensuring the normal progress of the work.

[0008] The driving assembly includes a driven shaft, which is rotatably connected to the dredging cylinder. A driving column is fixed to the outer periphery of the driven shaft. A plurality of arc-shaped protrusions are distributed in an annular shape on the outer periphery of the driving column. The arc-shaped protrusions cooperate with the dredging rod. The other end of the driving shaft extends out of the screening cylinder and is fixed with a driving sprocket. A driven sprocket is fixed on the driven shaft. The driving sprocket and the driven sprocket are connected through a transmission chain.

[0009] With the above structure, when the driving shaft drives the screening drum to rotate, the driving sprocket drives the driven sprocket to rotate, thereby driving the driven shaft to rotate, so that the driving column drives the arc-shaped protrusion to move in an annular manner, so that the dredging rod intermittently contacts the dredging rod, and cooperates with the first spring to realize the dredging operation of the screening hole, and can ensure that the rotation of the screening drum and the extension and retraction of the dredging rod are kept synchronous, preventing the rotation of the dredging rod from interfering with the rotation of the screening drum, and ensuring the normal operation.

[0010] A closing seat is fixed symmetrically on the outer side of the dredging cylinder, and a chute is provided on the side of the closing seat close to the screening cylinder. A closing plate is slidably connected to the inside of the chute. Semicircular grooves corresponding to the dredging rod are provided on the opposite surfaces of the two closing plates. A second spring is fixed between the closing plate and the chute, and the closing plate is in conflict with the dredging rod.

[0011] With the above structure, during the reciprocating extension and retraction of the dredging rod, on the one hand, the closing plate can be used to scrape off the debris on the dredging rod to prevent debris from remaining on the dredging rod and affecting the dredging operation of the screening cylinder. On the other hand, it can also prevent debris from falling between the screening cylinder and the dredging cylinder, thereby ensuring the quality of screening.

[0012] The driving shaft is sleeved with a mounting cylinder, on which a plurality of stirring rods are fixed, and a heating rod is fixed inside the stirring rod. The right end of the mounting cylinder is slidably connected to a connecting rod, and the other end of the connecting rod is fixedly connected to the feed cover. Annular grooves are provided at both left and right ends of the inner periphery of the mounting cylinder, and a first magnet block is fixed inside the annular groove. A plurality of second magnet blocks are distributed in an annular manner on the outer periphery of the driving shaft, and the magnetic poles of the opposing surfaces of the first magnet block and the second magnet block are the same, and the second magnet block at the left end and the second magnet block at the right end are staggered.

[0013] By adopting the above structure, the alfalfa material can be heated by the heating rod, thereby reducing the humidity of the alfalfa material, preventing alfalfa with a high water content from sticking and accumulating on the agitator assembly after entering the agitator assembly, and preventing wet debris from quickly clogging the screen, thereby ensuring the threshing efficiency. The load of the device operation can also be reduced, thereby protecting the device. In addition, during operation, the rotation of the drive shaft drives the two magnet blocks to rotate, while the mounting tube does not rotate under the positioning of the connecting rod and the feed cover, thereby allowing the second magnet block to be spaced relative to the first magnet block. Since the second magnet block at the left end and the second magnet block at the right end are staggered, the mounting tube can drive the stirring blade and the heating rod to move left and right on the drive shaft under the effect of like charges repelling each other, thereby increasing the heating range of the alfalfa material by the heating rod, thereby improving the drying efficiency and quality of the alfalfa.

[0014] The stirring rods are distributed in three groups in an annular manner on the mounting cylinder, and the stirring rods in each adjacent group are staggered.

[0015] With the above structure, the left and right intervals of the stirring rods can be reduced during production, thereby making the stirring rods more densely distributed without affecting the stirring effect of the material, thereby further improving the drying efficiency and quality of alfalfa.

[0016] The stirring cage assembly includes a box body, which is fixed on a mobile frame. A second motor is fixed to the outer end of the box body, and an output shaft end of the second motor is fixed to a stirring cage shaft located in the box body. A discharge port located above the secondary screening assembly is opened at the lower end of the box body, a plurality of rubber liners are fixed to the inside of the box body, a plurality of threshing teeth are fixed to the outer periphery of the stirring cage, and a flexible sleeve is provided on the outer side of the threshing teeth.

[0017] With the above structure, when working, the second motor drives the stirring cage shaft to rotate, and several threshing teeth move together with the stirring cage shaft. When the alfalfa material falling from the primary screening component enters the stirring cage component, the threshing teeth and the rubber lining cooperate to squeeze and knead the alfalfa to separate the alfalfa seeds from the seed pods, thereby realizing the threshing function. The rubber lining replaces the rigid friction in the traditional device, and reduces the impact damage to the seed pods in the seed pods by elastic extrusion, thereby reducing the seed breakage rate. At the same time, the rubber lining can prevent the alfalfa material from falling directly, thereby extending the residence time of the material in the stirring cage component, making the threshing more complete, and the threshed material falls downward onto the secondary screening component under the action of gravity for subsequent screening operations.

[0018] A cavity is provided inside the stirring cage shaft, a mounting shaft is fixed inside the box body, the mounting shaft extends into the cavity, a knocking assembly is provided on the mounting shaft, a plurality of knocking blocks are provided on the knocking assembly, the threshing teeth extend into the cavity and contact with the knocking blocks, and a transmission assembly is provided between the knocking assembly and the cavity.

[0019] With the above structure, during operation, the stirring cage shaft rotates while the mounting shaft does not rotate, so that the transmission drive drives the striking block on the striking assembly to oscillate back and forth, so that the striking block contacts the threshing teeth intermittently, thereby causing the threshing teeth to oscillate. In the oscillating state, the threshing teeth can improve the effect of separating alfalfa seeds from seed pods, etc.

[0020] The knocking assembly includes a third spring, one end of the third spring is fixed on the mounting shaft, the other end of the third spring is fixed with an oscillation plate, the oscillation plate is slidably connected to the mounting shaft, and the knocking block is fixed on the oscillation plate.

[0021] With the above structure, during operation, the transmission assembly intermittently presses the vibration plate, and cooperates with the third spring to make the vibration plate move back and forth, thereby realizing the beating block beating and vibrating the threshing teeth.

[0022] The transmission assembly includes a transmission ring fixed in the cavity, a plurality of transmission blocks fixed on the inner circumference of the transmission ring, an inclined surface is provided on the transmission block, and the side of the transmission block away from the inclined surface is a straight surface structure.

[0023] With the above structure, during operation, the transmission ring rotates with the stirring cage shaft, so that the vibration plate comes into contact with the inclined surface, and the vibration plate is pressed under the action of the inclined surface, and then the transmission ring continues to rotate. After the vibration plate and the transmission block are threshed, under the action of the third spring, the knocking block knocks and vibrates the threshing teeth.

[0024] The re-destocking component includes a powered material collecting screw conveyor, a powered chain plate type elevator and a powered material discharging screw conveyor. The powered material collecting screw conveyor, the powered chain plate type elevator and the powered material discharging screw conveyor are all fixed on a mobile frame. The feed end of the powered material collecting screw conveyor is located below the left end of the secondary screening component, and the discharge end of the powered material collecting screw conveyor is connected to the feed end of the powered chain plate type elevator, the feed end of the powered material discharging screw conveyor is connected to the discharge end of the powered chain plate type elevator, and the discharge end of the powered material discharging screw conveyor is connected to the stirring cage component.

[0025] With the above structure, the incompletely threshed materials falling from the left end of the secondary screening component will fall to the feed end of the powered material collecting screw conveyor. The powered material collecting screw conveyor transports the materials to the feed end of the powered chain plate type elevator through the rotation of its internal spiral blades. The materials thus enter the powered chain plate type elevator. The powered chain plate type elevator lifts the materials to its discharge end through the movement of the chain plate. The materials enter the powered discharge screw conveyor and are transported to the interior of the mixing cage component through the rotation of the spiral blades inside the powered discharge screw conveyor. These materials then enter the mixing cage component again for re-threshing, thereby further improving the threshing effect of alfalfa.

[0026] Compared with the existing technology, the automatic screening and threshing device for alfalfa has the following advantages:

[0027] 1. During operation, the alfalfa material first enters the feed pipe in the outer shell through the feed hopper, and then enters the screening cylinder through the feed cover. The first motor drives the drive shaft to rotate, and the drive shaft drives the screening cylinder to rotate, and performs preliminary screening on the alfalfa material that has just entered the device, and separates the alfalfa seeds that are easy to separate. The separated alfalfa seeds fall onto the aggregate seat, and then directly reach the three-stage screening component through the aggregate pipe for three-stage screening, and are directly collected. The alfalfa material after preliminary screening falls into the stirring cage component below through the discharge cover and the discharge pipe. The stirring cage component threshes the material and separates the alfalfa seeds from the seed pods. The separated seeds and seed pods fall to the top of the secondary screening component under the action of gravity, and the secondary screening component performs secondary screening on the material. The successfully threshed alfalfa seeds are screened out and enter the three-stage screening component, and are collected after the three-stage screening. The incompletely threshed alfalfa materials enter the re-threshing component, are lifted to the top of the stirring cage component by the re-threshing component, and enter the stirring cage component again for re-threshing and participate in the screening process again. During the process, the threshed seed pods will enter the discharge component, and the discharge component will discharge the threshed alfalfa seed pods to the discharge device, completing the entire alfalfa automatic screening and threshing process. The setting of this structure is that when the screening cylinder rotates, the drive component will drive the dredging rod to move, and cooperate with the first spring to make the dredging rod reciprocate and extend, so that the dredging rod can dredge the screening hole of the screening cylinder to prevent the alfalfa material from clogging the screening cylinder, thereby improving work efficiency and ensuring the normal progress of work.

[0028] 2. When the driving shaft drives the screening drum to rotate, the driving sprocket drives the driven sprocket to rotate, thereby driving the driven shaft to rotate, so that the driving column drives the arc-shaped protrusion to move in an annular manner, so that the dredging rod intermittently contacts the dredging rod, and cooperates with the first spring to realize the dredging operation of the screening hole, and can ensure that the rotation of the screening drum and the extension and retraction of the dredging rod are kept synchronous, preventing the rotation of the dredging rod from interfering with the rotation of the screening drum, and ensuring the normal operation.

[0029] 3. During the reciprocating extension and retraction of the dredge rod, on the one hand, the closing plate can be used to scrape off the debris on the dredge rod to prevent debris from remaining on the dredge rod and affecting the dredging operation of the screening cylinder. On the other hand, it can also prevent debris from falling between the screening cylinder and the dredge cylinder to ensure the quality of screening.

[0030] 4. The heating rod can be used to heat the alfalfa material, thereby reducing the humidity of the alfalfa material and preventing high-water content alfalfa from sticking and accumulating on the agitator assembly after entering the agitator assembly. It can also prevent wet debris from quickly clogging the screen, ensuring threshing efficiency, and reducing the load of the device operation to protect the device. During operation, the drive shaft rotates to drive the two magnet blocks to rotate, while the mounting cylinder does not rotate due to the positioning of the connecting rod and the feed cover, so that the second magnet block and the first magnet block are spaced relative to each other. Since the second magnet block on the left end and the second magnet block on the right end are staggered, the mounting cylinder can drive the stirring blade and the heating rod to move left and right on the drive shaft due to the effect of like charges repelling each other, thereby increasing the heating range of the alfalfa material by the heating rod, thereby improving the drying efficiency and quality of the alfalfa.

[0031] 5. During operation, the second motor drives the stirring cage shaft to rotate, and several threshing teeth move with the stirring cage shaft. When the alfalfa material falling from the primary screening component enters the stirring cage component, the threshing teeth and the rubber lining cooperate to squeeze and knead the alfalfa to separate the alfalfa seeds from the seed pods, thereby realizing the threshing function. The rubber lining replaces the rigid friction in the traditional device, and reduces the impact damage to the seed pods in the seed pods by elastic extrusion, thereby reducing the seed breakage rate. At the same time, the rubber lining can prevent the alfalfa material from falling directly, prolonging the residence time of the material in the stirring cage component, making the threshing more complete, and the threshed material falls downward onto the secondary screening component under the action of gravity for subsequent screening operations.

[0032] 6. During operation, the transmission ring rotates with the agitator shaft, so that the vibration plate comes into contact with the inclined surface, and the vibration plate is pressed under the action of the inclined surface. Then the transmission ring continues to rotate. After the vibration plate and the transmission block thresh, the third spring causes the beating block to knock and vibrate the threshing teeth. In the vibrating state, the threshing teeth can improve the separation effect of alfalfa seeds and seed pods. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention.

[0034] Figure 2 It is a structural schematic diagram of the screening cylinder in the present invention.

[0035] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0036] Figure 4 It is a schematic structural diagram of the primary screening component of the present invention.

[0037] Figure 5 It is a cross-sectional view of the screening drum in the present invention.

[0038] Figure 6It is a structural schematic diagram of the stirring rod in the present invention.

[0039] Figure 7 It is a structural schematic diagram of the stirring cage assembly in the present invention.

[0040] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle.

[0041] Figure 9 It is a structural diagram of the transmission component in the present invention.

[0042] Figure 10 It is a structural schematic diagram of the re-stripping component in the present invention.

[0043] In the figure, 1, mobile frame; 2, secondary screening assembly; 3, tertiary screening assembly; 4, stirring cage assembly; 5, housing; 6, feed hopper; 7, re-desorption assembly; 8, collection seat; 9, collection pipe; 10, screening cylinder; 11, dredging cylinder; 12, driving shaft; 13, mounting cylinder; 14, stirring rod; 15, heating rod; 16, driven shaft; 17, driving column; 18, arc-shaped protrusion; 19, dredging rod; 20, first spring; 21, closing seat; 22, second spring; 23, closing plate; 24, discharge cover; 25, discharge pipe; 26, feed cover; 27, Connecting rod; 28. Feed pipe; 29. ​​First motor; 30. Driven sprocket; 31. Drive sprocket; 32. Annular groove; 33. First magnet block; 34. Second magnet block; 35. Box body; 36. Second motor; 37. Cage shaft; 38. Rubber lining; 39. Cavity; 40. Mounting shaft; 41. Threshing teeth; 42. Flexible sleeve; 43. Third spring; 44. Oscillating plate; 45. Beating block; 46. Transmission ring; 47. Transmission block; 48. Power chain plate lifter; 49. Power discharge screw conveyor; 50. Power collection screw conveyor. DETAILED DESCRIPTION

[0044] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0045] like Figures 1-10As shown, the automatic screening and threshing device for alfalfa comprises a mobile frame 1 and a shell 5. The shell 5 is fixed to the upper end of the mobile frame 1. A feed hopper 6 is fixed to the upper side of the shell 5. A primary screening component is arranged inside the shell 5. A stirring cage component 4 is arranged on the mobile frame 1. The stirring cage component 4 is located below the shell 5. A secondary screening component 2 and a re-threshing component 7 are arranged on the mobile frame 1. The secondary screening component 2 is located below the stirring cage component 4, and a tertiary screening component 3 is provided at the right end of the secondary screening component 2. The discharging end of the primary screening component is located above the tertiary screening component 3. The upper end of the re-threshing component 7 passes through the side wall of the shell 5 and is located above the stirring cage component 4, and the lower end of the re-threshing component 7 is located on the left side of the secondary screening component 2. The primary screening component comprises a screening drum 10. A first motor 29 is fixed to the shell 5. The output shaft end of the first motor 29 is fixed There is a drive shaft 12, which is fixedly connected to the screening drum 10. A discharge port is provided at the left end of the screening drum 10. The left end of the outer periphery of the screening drum 10 is rotatably connected to the discharge cover 24, and the discharge cover 24 is connected to the stirring cage assembly 4 through the discharge pipe 25. The right end of the screening drum 10 is rotatably connected to the feed cover 26, and the upper end of the feed cover 26 is connected to the feed hopper 6 through the feed pipe 28. The interior of the outer shell 5 is rotatably connected to the dredging drum 11, and a number of dredging rods 19 are slidably connected to the dredging drum 11. The dredging rods 19 are corresponding to the screening holes of the screening drum 10. A first spring 20 is provided between the dredging rods 19 and the dredging drum 11. A driving assembly is provided inside the conveying drum. The interior of the outer shell 5 is fixed with a collection seat 8 located below the screening drum 10, and a collection pipe 9 is fixed to the lower end of the collection seat 8. The other end of the collection pipe 9 is located above the three-stage screening assembly 3.

[0046] During operation, the alfalfa material first enters the feed pipe 28 in the outer shell 5 through the feed hopper 6, and then enters the screening drum 10 through the feed cover 26. The drive shaft 12 is driven to rotate by the first motor 29, and the drive shaft 12 drives the screening drum 10 to rotate, and the alfalfa material that has just entered the device is preliminarily screened, and the alfalfa seeds that are easy to separate are separated. The separated alfalfa seeds fall onto the collecting seat 8, and then directly reach the three-stage screening component 3 through the collecting pipe 9 for three-stage screening, and are directly collected. The alfalfa material after the preliminary screening passes through the discharge cover 24 and the discharge pipe 25 and falls into the stirring cage component 4 below. The stirring cage component 4 threshes the material and separates the alfalfa seeds from the seed pods. The separated seeds and seed pods fall to the top of the secondary screening component 2 under the action of gravity, and the secondary screening component 2 performs secondary screening on the material. Screening, the successfully threshed alfalfa seeds are screened out and enter the three-stage screening component 3, and are collected after the three-stage screening. The incompletely threshed alfalfa materials enter the re-threshing component 7, are lifted to the top of the stirring cage component 4 by the re-threshing component 7, and enter the stirring cage component 4 again for re-threshing and participate in the screening process again. During the process, the threshed seed pods will enter the discharge component, and the discharge component will discharge the threshed alfalfa seed pods to complete the entire alfalfa automatic screening and threshing process. The setting of this structure is that when the screening cylinder 10 rotates, the driving component will drive the dredging rod 19 to move, and cooperate with the first spring 20 to make the dredging rod 19 reciprocate and extend, so that the dredging rod 19 can dredge the screening hole of the screening cylinder 10 to prevent the alfalfa material from clogging the screening cylinder 10, thereby improving the work efficiency and ensuring the normal progress of the work.

[0047] The driving assembly includes a driven shaft 16, which is rotationally connected to the dredging cylinder 11. A driving column 17 is fixed to the outer periphery of the driven shaft 16. A plurality of arc-shaped protrusions 18 are distributed in an annular shape on the outer periphery of the driving column 17. The arc-shaped protrusions 18 cooperate with the dredging rod 19. The other end of the driving shaft 12 extends out of the screening cylinder 10 and is fixed with a driving sprocket 31. A driven sprocket 30 is fixed on the driven shaft 16. The driving sprocket 31 is connected to the driven sprocket 30 through a transmission chain.

[0048] With the above structure, when the driving shaft 12 drives the screening drum 10 to rotate, the driven sprocket 30 is driven to rotate through the driving sprocket 31, thereby driving the driven shaft 16 to rotate, so that the driving column 17 drives the arc-shaped protrusion 18 to move in a circular motion, so that the dredging rod 19 intermittently contacts the dredging rod 19, and cooperates with the first spring 20 to achieve the dredging operation of the screening hole, and can ensure that the rotation of the screening drum 10 and the extension and retraction of the dredging rod 19 are kept synchronized, preventing the rotation of the dredging rod 19 from interfering with the rotation of the screening drum 10, thereby ensuring the normal operation.

[0049] A closing seat 21 is fixed symmetrically on the outer side of the dredging cylinder 11 in the upper and lower parts. A chute is provided on the side of the closing seat 21 close to the screening cylinder 10. A closing plate 23 is slidably connected to the inside of the chute. The opposite surfaces of the two closing plates 23 are provided with semicircular grooves corresponding to the dredging rod 19. A second spring 22 is fixed between the closing plate 23 and the chute, and the closing plate 23 is in conflict with the dredging rod 19.

[0050] With the above structure, during the reciprocating extension and retraction of the dredging rod 19, on the one hand, the closing plate 23 can be used to scrape off the debris on the dredging rod 19 to prevent debris from remaining on the dredging rod 19 and affecting the dredging operation of the screening cylinder 10; on the other hand, it can also prevent debris from falling between the screening cylinder 10 and the dredging cylinder 11, thereby ensuring the quality of screening.

[0051] A mounting cylinder 13 is sleeved on the drive shaft 12, and a plurality of stirring rods 14 are fixed on the mounting cylinder 13. A heating rod 15 is fixed inside the stirring rod 14. The right end of the mounting cylinder 13 is slidably connected to a connecting rod 27, and the other end of the connecting rod 27 is fixedly connected to the feed cover 26. Annular grooves 32 are provided on both the left and right ends of the inner periphery of the mounting cylinder 13, and a first magnet block 33 is fixed inside the annular groove 32. A plurality of second magnet blocks 34 are distributed in an annular manner on the outer periphery of the drive shaft 12, and the magnetic poles of the opposite surfaces of the first magnet block 33 and the second magnet block 34 are the same, and the second magnet block 34 at the left end and the second magnet block 34 at the right end are staggered.

[0052] The above structure can heat the alfalfa material through the heating rod 15, thereby reducing the humidity of the alfalfa material, preventing high-water content alfalfa from sticking and accumulating on the agitator assembly 4 after entering the agitator assembly 4, and preventing wet debris from quickly clogging the screen, thereby ensuring threshing efficiency and reducing the load on the device operation, thereby protecting the device. In addition, during operation, the drive shaft 12 rotates to drive the two magnet blocks to rotate, while the mounting tube 13 does not rotate due to the positioning of the connecting rod 27 and the feed cover 26, thereby causing the second magnet block 34 to be spaced relative to the first magnet block 33. Since the second magnet block 34 at the left end and the second magnet block 34 at the right end are staggered, the mounting tube 13 can drive the stirring blade and the heating rod 15 to move left and right on the drive shaft 12 due to the effect of like charges repelling each other, thereby increasing the heating range of the alfalfa material by the heating rod 15, thereby improving the drying efficiency and quality of the alfalfa.

[0053] There are three groups of stirring rods 14 distributed in an annular manner on the mounting cylinder 13 , and adjacent groups of stirring rods 14 are staggered.

[0054] With the above structure, the left and right intervals of the stirring rods 14 can be reduced during production, so that the stirring rods 14 are distributed more densely without affecting the stirring effect of the material, thereby further improving the drying efficiency and quality of alfalfa.

[0055] The stirring cage assembly 4 includes a box body 35, which is fixed on the mobile frame 1. A second motor 36 is fixed to the outer end of the box body 35, and a stirring cage shaft 37 located in the box body 35 is fixed to the output shaft end of the second motor 36. The lower end of the box body 35 is provided with a discharge port located above the secondary screening assembly 2. A number of rubber liners 38 are fixed inside the box body 35, and a number of threshing teeth 41 are fixed to the outer periphery of the stirring cage. The outer sleeve of the threshing teeth 41 is provided with a flexible sleeve 42.

[0056] With the above structure, during operation, the second motor 36 drives the stirring cage shaft 37 to rotate, and a number of threshing teeth 41 move together with the stirring cage shaft 37. When the alfalfa material falling from the primary screening component enters the stirring cage component 4, the threshing teeth 41 cooperate with the rubber lining 38 to squeeze and knead the alfalfa to separate the alfalfa seeds from the seed pods, thereby realizing the threshing function. The rubber lining 38 replaces the rigid friction in the traditional device, and reduces the impact damage to the seed pods in the seed pods by elastic extrusion, thereby reducing the seed breakage rate. At the same time, the rubber lining 38 can prevent the alfalfa material from falling directly, thereby extending the residence time of the material in the stirring cage component 4, making the threshing more complete, and the threshed material falls downward onto the secondary screening component 2 under the action of gravity for subsequent screening operations.

[0057] A cavity 39 is provided inside the stirring cage shaft 37, and a mounting shaft 40 is fixed inside the box body 35. The mounting shaft 40 extends into the cavity 39. A knocking assembly is provided on the mounting shaft 40, and a plurality of knocking blocks 45 are provided on the knocking assembly. The threshing teeth 41 extend into the cavity 39 and contact with the knocking blocks 45. A transmission assembly is provided between the knocking assembly and the cavity 39.

[0058] With the above structure, during operation, the stirring cage shaft 37 rotates while the mounting shaft 40 does not rotate, so that the transmission drive drives the striking block 45 on the striking assembly to oscillate back and forth, so that the striking block 45 contacts the threshing teeth 41 at intervals, thereby causing the threshing teeth 41 to oscillate. In the oscillating state, the threshing teeth 41 can improve the effect of separating alfalfa seeds from seed pods, etc.

[0059] The striking assembly includes a third spring 43 , one end of the third spring 43 is fixed to the mounting shaft 40 , the other end of the third spring 43 is fixed to an oscillation plate 44 , the oscillation plate 44 is slidably connected to the mounting shaft 40 , and the striking block 45 is fixed to the oscillation plate 44 .

[0060] With the above structure, during operation, the transmission assembly intermittently presses the oscillation plate 44 , and cooperates with the third spring 43 , so that the oscillation plate 44 moves back and forth, realizing the beating block 45 beating and oscillating the threshing teeth 41 .

[0061] The transmission assembly includes a transmission ring 46 fixed in the cavity 39. A plurality of transmission blocks 47 are fixed to the inner periphery of the transmission ring 46. The transmission blocks 47 are provided with inclined surfaces. The side of the transmission blocks 47 away from the inclined surfaces is a straight surface structure.

[0062] With the above structure, during operation, the transmission ring 46 rotates with the stirring cage shaft 37, so that the oscillation plate 44 comes into contact with the inclined surface, and the oscillation plate 44 is pressed under the action of the inclined surface, and then the transmission ring 46 continues to rotate. After the oscillation plate 44 and the transmission block 47 are threshed, under the action of the third spring 43, the knocking block 45 knocks and oscillates the threshing teeth 41.

[0063] The re-destocking component 7 includes a powered material collecting screw conveyor 50, a powered chain plate type elevator 48 and a powered discharging screw conveyor 49. The powered material collecting screw conveyor 50, the powered chain plate type elevator 48 and the powered discharging screw conveyor 49 are all fixed on the mobile frame 1. The feed end of the powered material collecting screw conveyor 50 is located below the left end of the secondary screening component 2, and the discharging end of the powered material collecting screw conveyor 50 is connected to the feed end of the powered chain plate type elevator 48, the feed end of the powered discharging screw conveyor 49 is connected to the discharging end of the powered chain plate type elevator 48, and the discharging end of the powered discharging screw conveyor 49 is connected to the stirring cage component 4.

[0064] With the above structure, the incompletely threshed materials falling from the left end of the secondary screening component 2 will fall to the feed end of the powered material collecting screw conveyor 50. The powered material collecting screw conveyor 50 transports the materials to the feed end of the powered chain plate type elevator 48 through the rotation of its internal spiral blades. The materials thus enter the powered chain plate type elevator 48. The powered chain plate type elevator 48 lifts the materials to its discharge end through the movement of the chain plate. The materials enter the powered discharge screw conveyor 49. The materials are transported to the inside of the mixing cage component 4 through the rotation of the spiral blades inside the powered discharge screw conveyor 49, so that these materials enter the mixing cage component 4 again for re-threshing treatment to further improve the threshing effect of alfalfa.

[0065] The working principle of the present invention is as follows: during operation, the alfalfa material first enters the feed pipe 28 in the outer shell 5 through the feed hopper 6, and then enters the screening drum 10 through the feed cover 26. The drive shaft 12 is driven by the first motor 29 to rotate, and the drive shaft 12 drives the screening drum 10 to rotate, and the alfalfa material that has just entered the device is preliminarily screened, and the alfalfa seeds that are easy to separate are separated. When the drive shaft 12 drives the screening drum 10 to rotate, the driven sprocket 31 drives the driven sprocket 30 to rotate, thereby driving the driven shaft 16 to rotate, so that the drive column 17 drives the arc-shaped protrusion 18 to move in a circular motion, so that the dredging rod 19 is intermittently connected with the dredging rod 19. The dredging rod 19 contacts and cooperates with the first spring 20 to make the dredging rod 19 reciprocate and extend, so that the dredging rod 19 dredges the screening holes of the screening cylinder 10 to prevent the alfalfa material from clogging the screening cylinder 10, improve the work efficiency, and ensure the normal progress of the work. At the same time, the alfalfa material can be heated by the heating rod 15 to reduce the humidity of the alfalfa material, prevent the alfalfa with high water content from sticking and accumulating on the mixing cage assembly 4 after entering the mixing cage assembly 4, and prevent the wet debris from quickly clogging the screen, thereby ensuring the efficiency of threshing, and reducing the load of the device operation to achieve protection of the device.During operation, the drive shaft 12 rotates to drive the two magnet blocks to rotate, while the mounting cylinder 13 does not rotate under the positioning of the connecting rod 27 and the feed cover 26, so that the second magnet block 34 is intermittently opposed to the first magnet block 33. Since the second magnet block 34 at the left end and the second magnet block 34 at the right end are staggered, the mounting cylinder 13 can drive the stirring blade and the heating rod 15 to move left and right on the drive shaft 12 under the effect of like charges repelling each other, thereby increasing the heating range of the alfalfa material by the heating rod 15. The separated alfalfa seeds fall onto the collecting seat 8, and then directly reach the three-stage screening component 3 through the collecting pipe 9 for three-stage screening, and are directly collected. The alfalfa material after preliminary screening falls into the stirring cage component 4 below through the discharge cover 24 and the discharge pipe 25. The second motor 36 drives the stirring cage shaft 37 to rotate, and a plurality of threshing teeth 41 move together with the stirring cage shaft 37. When the alfalfa material falling from the primary screening component enters the stirring cage component 4, the threshing teeth 41 and the rubber lining The rubber lining 38 replaces the rigid friction in the traditional device, reduces the impact damage to the seed pods in the seed pods by elastic squeezing, and reduces the seed breakage rate. At the same time, the rubber lining 38 can prevent the alfalfa material from falling directly, prolongs the residence time of the material in the stirring cage component 4, and makes the threshing more complete. The threshed material falls downward onto the secondary screening component 2 under the action of gravity, and the secondary screening component 2 performs secondary screening on the material. The successfully threshed alfalfa seeds are screened out and enter the tertiary screening component 3, and are collected after the tertiary screening. The incompletely threshed alfalfa material enters the re-threshing component 7, is lifted to the top of the stirring cage component 4 by the re-threshing component 7, and enters the stirring cage component 4 again for re-threshing and participates in the screening process again. During the process, the seed pods that have completed threshing will enter the discharge component, and the discharge component will discharge the threshed alfalfa seed pods out of the device, completing the entire alfalfa automatic screening and threshing process.

[0066] In summary, by setting up the structures such as the dredging rod 19 and the heating rod 15, the functions of preventing the wet debris from clogging the screening component, reducing the load of the equipment, and improving the threshing efficiency are achieved.

[0067] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. An automatic screening and threshing device for alfalfa, comprising a movable frame (1) and a housing (5), characterized in that: The housing (5) is fixed to the upper end of the mobile frame (1), a feed hopper (6) is fixed to the upper side of the housing (5), a primary screening component is arranged inside the housing (5), a stirring cage component (4) is arranged on the mobile frame (1), the stirring cage component (4) is located below the housing (5), a secondary screening component (2) and a re-desorption component (7) are arranged on the mobile frame (1), the secondary screening component (2) is located below the stirring cage component (4), and a tertiary screening component (3) is provided at the right end of the secondary screening component (2), the discharge end of the primary screening component is located above the tertiary screening component (3), the upper end of the re-desorption component (7) passes through the side wall of the housing (5) and is located above the stirring cage component (4), and the lower end of the re-desorption component (7) is located on the left side of the secondary screening component (2), the primary screening component includes a screening drum (10), a first motor (29) is fixed to the housing (5), a drive shaft (12) is fixed to the output shaft end of the first motor (29), and the drive shaft (12) The screen cylinder (10) is fixedly connected to the screen cylinder (10), and a discharge port is provided at the left end of the screen cylinder (10). The left end of the outer periphery of the screen cylinder (10) is rotatably connected to a discharge cover (24), and the discharge cover (24) is connected to the stirring cage assembly (4) through a discharge pipe (25). The right end of the screen cylinder (10) is rotatably connected to a feed cover (26), and the upper end of the feed cover (26) is connected to the feed hopper (6) through a feed pipe (28). The interior of the shell (5) is rotatably connected to a dredging cylinder (11), and the dredging cylinder ( A plurality of dredging rods (19) are slidably connected to the upper portion of the dredging rod (19), the dredging rods (19) are arranged corresponding to the screening holes of the screening cylinder (10), a first spring (20) is arranged between the dredging rod (19) and the dredging cylinder (11), a driving assembly is arranged inside the conveying cylinder, a collection seat (8) located below the screening cylinder (10) is fixed inside the outer shell (5), a collection pipe (9) is fixed at the lower end of the collection seat (8), and the other end of the collection pipe (9) is located above the three-stage screening assembly (3).

2. The automatic screening and threshing device for alfalfa according to claim 1, characterized in that: The driving assembly includes a driven shaft (16), which is rotatably connected to the dredging cylinder (11). A driving column (17) is fixed to the outer periphery of the driven shaft (16). A plurality of arc-shaped protrusions (18) are distributed in an annular manner on the outer periphery of the driving column (17). The arc-shaped protrusions (18) cooperate with the dredging rod (19). The other end of the driving shaft (12) extends out of the screening cylinder (10) and is fixed with a driving sprocket (31). A driven sprocket (30) is fixed on the driven shaft (16). The driving sprocket (31) and the driven sprocket (30) are connected through a transmission chain.

3. The automatic screening and threshing device for alfalfa according to claim 1, characterized in that: A closing seat (21) is fixed symmetrically on the outer side of the dredging cylinder (11), and a chute is provided on the side of the closing seat (21) close to the screening cylinder (10). A closing plate (23) is slidably connected inside the chute. The opposite surfaces of the two closing plates (23) are provided with semicircular grooves corresponding to the dredging rod (19). A second spring (22) is fixed between the closing plate (23) and the chute, and the closing plate (23) is in contact with the dredging rod (19).

4. The automatic screening and threshing device for alfalfa according to claim 1, characterized in that: The drive shaft (12) is sleeved with a mounting cylinder (13), a plurality of stirring rods (14) are fixed on the mounting cylinder (13), a heating rod (15) is fixed inside the stirring rod (14), a connecting rod (27) is slidably connected to the right end of the mounting cylinder (13), and the other end of the connecting rod (27) is fixedly connected to the feed cover (26), an annular groove (32) is provided on both the left and right ends of the inner periphery of the mounting cylinder (13), a first magnet block (33) is fixed inside the annular groove (32), and a plurality of second magnet blocks (34) are distributed in an annular manner on the outer periphery of the drive shaft (12), the magnetic poles of the opposite surfaces of the first magnet block (33) and the second magnet block (34) are the same, and the second magnet block (34) at the left end and the second magnet block (34) at the right end are staggered.

5. The automatic screening and threshing device for alfalfa according to claim 4, characterized in that: The stirring rods (14) are distributed in three groups in an annular manner on the mounting cylinder (13), and each adjacent group of stirring rods (14) are staggered.

6. The automatic screening and threshing device for alfalfa according to claim 1, characterized in that: The stirring cage assembly (4) includes a box body (35), the box body (35) is fixed on the mobile frame (1), a second motor (36) is fixed to the outer end of the box body (35), an stirring cage shaft (37) located in the box body (35) is fixed to the output shaft end of the second motor (36), a discharge port located above the secondary screening assembly (2) is opened at the lower end of the box body (35), a plurality of rubber linings (38) are fixed inside the box body (35), a plurality of threshing teeth (41) are fixed to the outer periphery of the stirring cage, and a flexible sleeve (42) is provided on the outer side of the threshing teeth (41).

7. The automatic screening and threshing device for alfalfa according to claim 6, characterized in that: A cavity (39) is provided inside the stirring cage shaft (37), a mounting shaft (40) is fixed inside the box body (35), the mounting shaft (40) extends into the cavity (39), a striking assembly is provided on the mounting shaft (40), a plurality of striking blocks (45) are provided on the striking assembly, the threshing teeth (41) extend into the cavity (39) and contact with the striking blocks (45), and a transmission assembly is provided between the striking assembly and the cavity (39).

8. The automatic screening and threshing device for alfalfa according to claim 7, characterized in that: The knocking assembly includes a third spring (43), one end of the third spring (43) is fixed on the mounting shaft (40), the other end of the third spring (43) is fixed with an oscillation plate (44), the oscillation plate (44) is slidably connected to the mounting shaft (40), and the knocking block (45) is fixed on the oscillation plate (44).

9. The automatic screening and threshing device for alfalfa according to claim 8, characterized in that: The transmission assembly includes a transmission ring (46) fixed in the cavity (39), a plurality of transmission blocks (47) fixed on the inner periphery of the transmission ring (46), an inclined surface is provided on the transmission block (47), and a side of the transmission block (47) away from the inclined surface is a straight surface structure.

10. The automatic screening and threshing device for alfalfa according to claim 1, characterized in that: The re-desorption component (7) includes a powered material collection screw conveyor (50), a powered chain plate type elevator (48) and a powered material discharging screw conveyor (49), the powered material collection screw conveyor (50), the powered chain plate type elevator (48) and the powered material discharging screw conveyor (49) are all fixed on the mobile frame (1), the feed end of the powered material collection screw conveyor (50) is located below the left end of the secondary screening component (2), and the discharge end of the powered material collection screw conveyor (50) is connected to the feed end of the powered chain plate type elevator (48), the feed end of the powered material discharging screw conveyor (49) is connected to the discharge end of the powered chain plate type elevator (48), and the discharge end of the powered material discharging screw conveyor (49) is connected to the stirring cage component (4).

Images