Simple rice thresher

Abstract

The invention discloses a simple rice thresher, which relates to the technical field of agricultural equipment and comprises a rack, a feeding cover arranged on the rack, a feeding port formed by the feeding cover and the rack, a screening device arranged between the rack and the feeding cover, a threshing device arranged above the screening device and connected with the feeding port, and a discharging device arranged on the rack and connected with the screening device. The waste discharging device is arranged on the rack and connected with the screening device and the threshing device. Flexible threshing of rice ears can be achieved, complete threshing is guaranteed, meanwhile, grain damage is reduced, and the rice quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural equipment, and specifically relates to a simple rice thresher. Background Art

[0002] Rice is one of the main food crops in China. After harvesting, it needs to be threshed to separate the paddy from the straw. The traditional rice threshing method mostly relies on manual waving of rice ears to beat on the threshing board, so that the paddy is separated from the rice ears. This method not only has extremely high labor intensity and extremely low efficiency, but also the threshing effect is uneven. In order to improve the threshing efficiency of rice, a thresher is generally used for threshing, thereby improving the threshing efficiency of rice.

[0003] Existing rice threshers generally adopt rigid spike teeth or plate teeth type threshing drums. Although they can complete the threshing operation, the threshing process is through direct collision of rigid elements such as rigid spike teeth or plate teeth type threshing drums with rice ears, which easily causes grain breakage, thereby reducing the actual output of paddy. At the same time, the rice ears are not completely threshed, and a large amount of waste is easily generated. Summary of the Invention

[0004] The purpose of the present invention is to provide a simple rice thresher, which can realize the flexible threshing of rice ears, ensure complete threshing, reduce grain breakage, and guarantee the quality of paddy.

[0005] The above optimized structure of the present invention is achieved through the following technical solutions: A simple rice thresher includes a frame; A feeding cover, the feeding cover is arranged on the frame and forms a feeding port with the frame; A screening device, the screening device is arranged between the frame and the feeding cover; A threshing device, the threshing device is arranged above the screening device and is connected to the feeding port; A blanking device, the blanking device is arranged on the frame and is connected to the screening device; A waste discharging device, the waste discharging device is arranged on the frame and is connected to the screening device and the threshing device.

[0006] In some embodiments, the threshing device includes a threshing motor, and the threshing motor is arranged on one side of the frame; A threshing main roller, the threshing main roller is horizontally rotatably arranged in the frame and is arranged above the screening device. The threshing main roller, the feeding cover and the screening device form a threshing area. One side of the threshing area is connected to the feeding port, and the other side is connected to the waste discharging device; A plurality of fixed curved bars, and a plurality of the fixed curved bars are arranged in a ring on the threshing main roller; Flexible threshing bars, and the flexible threshing bars are detachably arranged on the fixed curved bars.

[0007] In some embodiments, a plurality of the fixed curved bars are spirally arranged on the main threshing roller, and the spiral direction of the fixed curved bars is the same as the rotation direction of the main threshing roller.

[0008] In some embodiments, the threshing device further includes a rotating end cover, and the rotating end cover is rotatably arranged on one side of the frame close to the feeding port; a rotating ring, and the rotating ring is rotatably arranged on one side of the frame away from the feeding port; a plurality of rotating rods, and a plurality of the rotating rods are annularly arranged between the rotating end cover and the rotating ring.

[0009] In some embodiments, the threshing device further includes a plurality of rubbing bars, and a plurality of the rubbing bars are equidistantly arranged on the outer wall of the rotating rod, and the rotating rod is rotatably arranged between the rotating end cover and the rotating ring.

[0010] In some embodiments, the screening device includes a screen, and the screen is arranged below the threshing device; a rotating shaft, and the rotating shaft is rotatably arranged on the frame and is arranged on one side of the screen away from the waste discharging device; a plurality of fan blades, and a plurality of the fan blades are annularly arranged on the rotating shaft.

[0011] In some embodiments, the screening device further includes a lifting frame, and the lifting frame surrounds the screen; a lifting ring groove, and the lifting ring groove is arranged on the frame, and the lifting frame is slidably arranged in the lifting ring groove; a plurality of springs, and a plurality of the springs are equidistantly arranged between the top of the lifting frame and the inner top wall of the lifting ring groove.

[0012] In some embodiments, the blanking device includes a receiving hopper, the receiving hopper is arranged below the screen, a rotating shaft is arranged on one side of the receiving hopper, and a waste discharging device is arranged on one side of the receiving hopper away from the rotating shaft; a blanking pipe, and the blanking pipe is arranged below the receiving hopper and penetrates through a side wall of the frame.

[0013] In some embodiments, the waste discharging device includes a first discharge pipe, and the first discharge pipe is arranged on one side of the threshing area away from the feeding port; a second discharge pipe, and the second discharge pipe is arranged obliquely downward and is connected to the receiving hopper.

[0014] In some embodiments, a transmission device is further included, and the transmission device includes a first pulley, and the first pulley is coaxially fixed on the output shaft of the threshing motor; A drive shaft, which is coaxially connected to the main threshing roller and is rotatably arranged on the frame; A second pulley, which is sleeved on the drive shaft; A third pulley, which is coaxially sleeved on the rotating shaft; A transmission belt, which is in transmission connection with the first pulley, the second pulley and the third pulley; A driving gear, which is coaxially sleeved on the drive shaft; A gear ring, which is arranged on the inner wall of the rotating end cover; At least three transmission gears, which are equidistantly arranged on the rotating end cover and can rotate on the rotating end cover, and the transmission gears are meshed with the driving gear and the gear ring.

[0015] One or more of the above technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: In the present invention, a plurality of fixed curved strips and flexible threshing strips are spirally distributed on the main threshing roller, and the spiral direction is the same as the rotation direction of the main threshing roller, so that the rice ears move along the spiral direction in the threshing area, prolonging the threshing time and improving the threshing effect. By combining the hard contact of the fixed curved strips and the flexible contact of the flexible threshing strips, the rice can be separated from the rice ears by hitting and rubbing the rice ears without damaging the rice grains, increasing the uniformity and thoroughness of threshing, and at the same time reducing grain breakage and ensuring the quality of the rice.

[0016] In the present invention, a plurality of rotatable rotating rods are arranged outside the main threshing roller, and rubbing strips are arranged on the rotating rods, and the rotation directions of the plurality of rotating rods are opposite to the rotation direction of the main threshing roller. The rubbing strips can further rub and separate the rice ears, further improving the threshing efficiency and threshing purity. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a sectional view of the present invention; Figure 3 For the present invention Figure 2 An enlarged view of part A; Figure 4This is a schematic diagram of the drive connection structure in the threshing device of the present invention.

[0019] In the figure: 1, frame; 2, feed cover; 21, feed inlet; 3, screening device; 31, screen; 32, rotating shaft; 33, fan blade; 34, lifting frame; 35, lifting ring groove; 36, spring; 4, threshing device; 41, threshing motor; 42, threshing main roller; 43, threshing area; 44, fixed curved strip; 45, flexible threshing strip; 46, rotating end cover; 47, rotating ring; 48, rotating rod; 49, rubbing strip; 5, blanking device; 51, receiving hopper; 52, blanking pipe; 6, waste discharging device; 61, first discharging pipe; 62, second discharging pipe; 7, transmission device; 71, first belt pulley; 72, transmission shaft; 73, second belt pulley; 74, third belt pulley; 75, transmission belt; 76, driving gear; 77, gear ring; 78, transmission gear. Detailed implementation manners

[0020] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as a limitation to the present invention.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0023] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Reference Figures 1-4 , a simple rice thresher, comprising a frame 1, a feeding cover 2, a screening device 3, a threshing device 4, a blanking device 5, a waste discharging device 6, and a transmission device 7. The frame 1 is the supporting structure of the entire thresher and can be welded with high-strength steel, having good stability and load-bearing capacity. The feeding cover 2 is installed at the top of the frame 1 and jointly forms a feeding port 21 with the frame 1. The feeding cover 2 can be made of stainless steel and has a certain curvature to intercept the rice grains during the threshing process and make them move along a predetermined path. The size of the feeding port 21 is designed according to actual needs to facilitate the operator to put the rice ears into it. The feeding cover 2 can be a flip-type structure, hinged to the frame 1 on one side and detachably connected through structures such as screws on the other side, so as to facilitate opening the feeding cover 2 for repairing the thresher. The screening device 3 is arranged between the frame 1 and the feeding cover 2 and can separate the rice grains from the rice straws. The threshing device 4 is arranged above the screening device 3 and connected to the feeding port 21 to thresh the rice ears. The blanking device 5 is arranged on the frame 1 and connected to the screening device 3 to collect the screened rice grains. The waste discharging device 6 is arranged on the frame 1 and connected to the screening device 3 and the threshing device 4 to discharge waste such as rice straws.

[0025] In some embodiments, the threshing device 4 includes a threshing motor 41, a threshing main roller 42, a plurality of fixed curved bars 44, and a flexible threshing bar 45. The threshing motor 41 is disposed on one side of the frame 1 and can be a three-phase asynchronous motor. The threshing motor 41 can be fixedly connected to the frame 1 by bolts, and its output shaft is connected to the transmission device 7 to provide power for the threshing main roller 42 and the rotating shaft 32. The threshing main roller 42 is horizontally rotatably disposed within the frame 1 and above the screening device 3. Both ends of the threshing main roller 42 can be connected to the frame 1 through bearings to achieve flexible rotation. The threshing main roller 42, the feed cover 2, and the screening device 3 form a threshing area 43. One side of the threshing area 43 is connected to the feed inlet 21, and the other side is connected to the waste discharging device 6. A plurality of fixed curved bars 44 are annularly disposed on the threshing main roller 42. The plurality of fixed curved bars 44 are spirally disposed on the threshing main roller 42, and the spiral direction of the fixed curved bars 44 is the same as the rotation direction of the threshing main roller 42. The fixed curved bars 44 can be made of high-strength steel and are fixed to the threshing main roller 42 by welding or bolt connection. The spiral design of the fixed curved bars 44 enables the rice ears to move along the spiral direction within the threshing area, increasing the threshing time and effect. At the same time, it can form a guiding effect in the threshing area 43, enabling the waste such as rice straws after threshing to move forward spirally in the threshing area 43, avoiding the blockage of the threshing area 43 by waste such as rice straws, thereby affecting the threshing of the rice ears. The flexible threshing bar 45 is detachably disposed on the fixed curved bars 44. The flexible threshing bar 45 can be made of flexible materials such as rubber or silica gel. The surface of the flexible threshing bar 45 has a certain roughness, which can increase the friction between the flexible threshing bar 45 and the rice ears, so that the rice grains can be effectively separated from the rice ears without damaging the rice grains. One end of the fixed curved bar 44 can be provided with a T-shaped placement groove, and the flexible threshing bar 45 can be inserted and matched with the placement groove, and a buckle structure is provided at the opening of the fixed curved bar 44, so that the flexible threshing bar 45 can be conveniently replaced after wear.

[0026] In the threshing area 43, the rice ears are subjected to the combined action of the threshing main roller 42, the fixed curved bars 44, and the flexible threshing bar 45. The rotation of the threshing main roller 42 drives the fixed curved bars 44 and the flexible threshing bar 45 to rub and strike the rice ears. While the flexible threshing bar 45 exerts a force on the rice ears, the rice ears also generate a reaction force on the flexible threshing bar 45. Since the flexible threshing bar 45 has a certain flexibility, it can buffer and absorb the impact force to a certain extent, thereby reducing the damage to the rice grains. At the same time, during the rotation of the spirally distributed fixed curved bars 44, not only an axial thrust but also a radial centrifugal force are generated on the rice ears, causing the rice ears to continuously roll and collide within the threshing area 43, promoting the detachment of the grains from the rice ears.

[0027] In some embodiments, the threshing device 4 further includes a rotating end cover 46, a rotating ring 47, and multiple rotating rods 48. The rotating end cover 46 is rotatably installed on one side of the frame 1 close to the feed inlet 21 and can be connected to the frame 1 through a bearing. The rotating ring 47 is rotatably installed on the side of the frame 1 away from the feed inlet 21 and can also be connected to the frame 1 through a bearing. Multiple rotating rods 48 are arranged in a ring between the rotating end cover 46 and the rotating ring 47. The combined action of the rotating end cover 46, the rotating ring 47, and the multiple rotating rods 48 can form an auxiliary threshing structure. By the rotation of the rotating end cover 46, the multiple rotating rods 48 can be driven to rotate outside the main threshing roller 42, so that the rice ears in the threshing area 43 are subjected to the combined friction of the flexible threshing strips 45 and the rotating rods 48, further improving the threshing effect of the rice ears.

[0028] In some embodiments, the threshing device 4 further includes multiple kneading strips 49. The multiple kneading strips 49 are arranged at equal intervals on the outer wall of the rotating rod 48. The kneading strips 49 can be made of materials such as plastic or rubber. The kneading strips 49 can be strip-shaped and have certain protrusions or textures on the surface, which can enhance the kneading effect on the rice ears and improve the threshing efficiency. The rotating rod 48 is rotatably arranged between the rotating end cover 46 and the rotating ring 47. By the rotation of the rotating rod 48, the rotation of the kneading strips 49 is driven, so as to form an action similar to stir-frying in the threshing area 43 to further knead the rice ears. The acting direction of the kneading strips 49 forms a certain angle with the moving direction of the rice ears to form a tangential force, which helps to break the binding force between the rice ears and the paddy, thereby improving the uniformity of the friction force received by the rice ears and the uniformity of threshing of the rice ears, and ensuring the complete threshing of the paddy.

[0029] In some embodiments, a feed inlet 21 is provided between the rotating ring 47 and a side wall of the frame 1, which can avoid the influence of the rotation of the multiple rotating rods on the feeding of the rice ears. The rotating end cover 46 and the multiple rotating rods 48 can be connected through an adapter ring and an adapter rod. Multiple rotating rods 48 are connected between the adapter ring and the rotating ring 47. The adapter ring can be connected to the frame 1 through a bearing to ensure the rotation of the adapter ring. The adapter ring and the rotating end cover 46 are connected through three adapter rods. The three adapter rods are arranged in a ring. The three adapter rods can equally divide the space between the adapter ring and the rotating end cover 46 into three parts. This space is connected to the first discharge pipe, which can ensure the connection strength between the adapter ring and the rotating end cover 46 while reducing the influence of the adapter rods following the rotation of the rotating end cover 46 on the discharge of waste such as rice straws.

[0030] In some embodiments, the screening device 3 includes a screen 31, a rotating shaft 32, and a plurality of fan blades 33. The screen 31 is disposed below the threshing device 4. The screen 31 can be woven from stainless steel wire and has an appropriate mesh size, which can ensure the smooth passage of paddy rice and intercept sundries such as straw and rice husks. The screen 31 can be arc-shaped to facilitate cooperation with the threshing device 4 and form a uniform flow channel in the threshing area 43. The rotating shaft 32 is rotatably disposed on the frame 1 and is disposed on the side of the screen 31 away from the waste discharging device 6. The rotating shaft 32 can be connected to the frame 1 through a bearing, which can reduce the friction when the rotating shaft 32 rotates. The plurality of fan blades 33 are annularly disposed on the rotating shaft 32. The fan blades 33 can be arc-shaped and can be made of plastic or aluminum alloy. When the rotating shaft 32 rotates, the fan blades 33 will generate wind force to blow the lighter sundries after threshing towards the waste discharging device 6, thereby realizing the collection of waste such as rice straw.

[0031] In some embodiments, the screening device 3 further includes a lifting frame 34, a lifting ring groove 35, and a plurality of springs 36. The lifting frame 34 surrounds the screen 31 and is fixedly connected to the screen 31. The lifting frame 34 can be made of steel to ensure the strength and rigidity of the lifting frame 34. The lifting ring groove 35 is disposed on the frame 1, and the lifting frame 34 is slidably disposed in the lifting ring groove 35. The lifting ring groove 35 can limit the movement range of the screen 31 and ensure the stable movement of the screen 31 in the vertical direction. The cross-sections of the lifting frame 34 and the lifting ring groove 35 can both be convex-shaped to avoid the separation between the lifting frame 34 and the lifting ring groove 35. The plurality of springs 36 are equidistantly disposed between the top of the lifting frame 34 and the inner top wall of the lifting ring groove 35. The springs 36 can be spiral springs and have an appropriate elastic coefficient. When vibrations occur during the threshing process, the springs 36 will play a buffering and shock-absorbing role, and at the same time cause the screen 31 to vibrate up and down, so that the paddy rice and sundries continuously jump on the screen 31, increasing the contact opportunity between the paddy rice and the screen, improving the screening effect, and at the same time avoiding the accumulation of sundries on the screen 31 and ensuring the smooth flow of paddy rice.

[0032] In some embodiments, the feeding device 5 includes a receiving hopper 51 and a feeding pipe 52. The receiving hopper 51 is disposed below the screen 31 and can be funnel-shaped with a relatively large opening at the top, which can collect the paddy rice falling from the screen 31. A rotating shaft 32 is disposed on one side of the receiving hopper 51, and a waste discharging device 6 is disposed on the side of the receiving hopper 51 away from the rotating shaft 32. The feeding pipe 52 is disposed below the receiving hopper 51 and is connected to the bottom opening of the receiving hopper 51 and penetrates through a side wall of the frame 1, which can guide the paddy rice to the outside of the frame 1 for the convenience of collecting paddy rice. The diameter of the feeding pipe 52 is designed according to the flow rate of paddy rice and can convey the collected paddy rice to a storage container.

[0033] In some embodiments, the waste discharging device 6 includes a first discharging pipe 61 and a second discharging pipe 62. The first discharging pipe 61 is arranged on the side of the threshing area 43 away from the feeding port 21 and is communicated with the threshing area 43. The first discharging pipe 61 is used to discharge larger sundries such as rice straws after threshing. The second discharging pipe 62 is arranged obliquely downward and is connected to the receiving hopper 51 to discharge the waste that fails to pass through the sieve during the screening process. Under the action of the wind force generated by the fan blade 33, the lighter sundries after threshing, such as rice husks, dust, etc., will be discharged through the second discharging pipe 62.

[0034] In some embodiments, the transmission device 7 can transmit the power of the threshing motor 41 to the threshing main roller 42, the rotating shaft 32 and the rotating rod 48. The transmission device 7 includes a first pulley 71, a transmission shaft 72, a second pulley 73, a third pulley 74, a transmission belt 75, a driving gear 76, a gear ring 77 and at least three transmission gears 78. The first pulley 71 is coaxially fixed on the output shaft of the threshing motor 41 and rotates with the rotation of the threshing motor 41. The transmission shaft 72 is coaxially connected to the threshing main roller 42 and is rotatably installed on the frame 1. The transmission shaft 72 can be connected to the frame 1 through a bearing to reduce the friction during rotation. The second pulley 73 is sleeved on the transmission shaft 72 and is in transmission connection with the first pulley 71 through the transmission belt 75. When the threshing motor 41 rotates, the transmission shaft 72 and the threshing main roller 42 are driven to rotate through the transmission belt 75. The third pulley 74 is coaxially sleeved on the rotating shaft 32 and is also in transmission connection with the first pulley 71 through the transmission belt 75. In this way, the power of the threshing motor 41 can be transmitted to the threshing main roller 42 and the rotating shaft 32 at the same time. Belt transmission has the characteristics of stable transmission, buffering and shock absorption, can buffer the load impact, and achieve stable transmission.

[0035] The driving gear 76 is coaxially sleeved on the transmission shaft 72 and rotates with the rotation of the transmission shaft 72. The gear ring 77 is arranged on the inner wall of the rotating end cover 46 and is meshed with the driving gear 76 through at least three transmission gears 78. When the driving gear 76 rotates, the gear ring 77 and the rotating end cover 46 are driven to rotate through the transmission gears 78, and then the rotating rod 48 rotates in the opposite direction to the threshing main roller 42.

[0036] When the threshing main roller 42 rotates forward and drives the flexible threshing strip 45 to rotate spirally, through the transmission between the driving gear 76, the transmission gears 78 and the gear ring 77, the rotating end cover 46 will drive the rotating rod 48 to rotate in the reverse direction, so as to form a bionic flexible threshing structure between the threshing main roller 42 and multiple rotating rods 48, and separate the paddy from the rice ears through the friction and collision with the rice ears, thus realizing low-damage threshing and efficient separation.

[0037] Specifically, when the threshing main roller 42 rotates, it drives the substances in contact with the threshing main roller 42 to rotate, so that these substances are subjected to the action of centripetal force and have a tendency to move away from the threshing main roller 42. Due to the different masses of substances such as paddy, rice ears, and rice straws, a layering effect appears under the action of the same centrifugal force. The paddy with a larger mass will break through the restraint of the flexible threshing strip 45 under the action of centrifugal force and move outward in a parabolic trajectory. At this time, the reverse rotation of the rotating rod 48 will generate a reverse shear force, further stripping the grains attached to the rice ears and achieving low-damage threshing. The rice straws with a smaller mass still move in the rotation direction of the threshing main roller 42 due to insufficient inertia. The spiral layout of the flexible threshing strip 45 will generate an axial thrust, continuously pushing these materials to the end of the threshing area to prevent accumulation and blockage.

[0038] The specific working principle is as follows: When the threshing motor 41 is started, the threshing motor 41 drives the transmission shaft 72 and the third pulley 74 through the first pulley 71 and the transmission belt 75, realizing the synchronous start of the threshing main roller 42 and the rotating shaft 32 of the screening device 3.

[0039] The driving gear 76 drives the transmission gear 78 to mesh with the gear ring 77, causing the rotating end cover 46 to rotate in the reverse direction, and the rubbing strip 49 on the rotating rod 48 and the threshing main roller 42 to form a reverse shear motion.

[0040] The operator puts the rice ears into the thresher from the feed inlet 21. The rice ears enter the threshing area 43 formed by the threshing main roller 42, the feed cover 2, and the screening device 3 under the rotation of the threshing main roller 42. The spiral layout of the fixed curved strip 44 guides the rice ears to advance along the axis of the threshing main roller 42, increasing the threshing time and effect, and preventing waste such as rice straws from blocking the threshing area 43. When the flexible threshing strip 45 rotates with the threshing main roller 42, it generates a frictional force with the rice ears, separating the paddy from the rice ears. At the same time, when the rubbing strip 49 on the rotating rod 48 rotates, it rubs the rice ears, further improving the threshing effect.

[0041] The rotating rod 48 rotates in the opposite direction to the threshing main roller 42. The rotation of the threshing main roller 42 causes substances such as rice ears and paddy to be subjected to centripetal force and have a tendency to move away from the threshing main roller 42. The paddy with a large mass breaks through the restraint of the flexible threshing strip 45 under centrifugal force and moves outward. The reverse shear force of the rotating rod 48 further strips the grains, achieving low-damage threshing; the rice straws with a small mass still move in the rotation direction of the threshing main roller 42 due to insufficient inertia. The spiral layout of the flexible threshing strip 45 generates an axial thrust, pushing it to the end of the threshing area 43. The larger debris such as the threshed rice straws is discharged through the first discharge pipe 61.

[0042] The threshed mixture falls onto the lower sieve 31. The vibration during the threshing process causes the spring 36 to drive the sieve 31 to vibrate up and down, thereby preventing debris such as straw and rice husks from accumulating on the sieve 31 and clogging the sieve 31, facilitating the passage of paddy through the sieve 31.

[0043] The mixture screened by the sieve 31 flows downward under its own gravity to the funnel-shaped material receiving hopper 51. During the descent of the mixture, the rotating shaft 32 drives the fan blades 33 to rotate, generating wind force to blow the lighter debris (such as rice husks and dust) in the mixture towards the second discharge pipe 62 and discharging them from the second discharge pipe 62; while the paddy after winnowing enters the material receiving hopper 51 and finally slides into the storage container along the blanking pipe 52 to achieve the collection of paddy.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A simple rice thresher, characterized in that: including a frame (1); A feed cover (2), the feed cover (2) being arranged on the frame (1) and forming a feed opening (21) together with the frame (1); A screening device (3), wherein the screening device (3) is arranged between the frame (1) and the feed cover (2); A threshing device (4), the threshing device (4) being arranged above the screening device (3) and connected to the feed port (21); A material unloading device (5), the material unloading device (5) being arranged on the frame (1) and connected to the screening device (3); A waste discharging device (6), wherein the waste discharging device (6) is arranged on the frame (1) and is connected to the screening device (3) and the threshing device (4).

2. A simple rice thresher according to claim 1, characterized in that: The threshing device (4) comprises a threshing motor (41), and the threshing motor (41) is arranged on one side of the frame (1); a main threshing roller (42), the main threshing roller (42) being arranged in a transversely rotatable manner in the frame (1) and being arranged above the screening device (3); the main threshing roller (42) and the feed cover (2) and the screening device (3) forming a threshing area (43); one side of the threshing area (43) being connected to the feed port (21) and the other side being connected to the waste discharge device (6); a plurality of fixed curved strips (44), wherein the plurality of fixed curved strips (44) are arranged in a ring shape on the threshing main roller (42); A flexible threshing bar (45), wherein the flexible threshing bar (45) is detachably arranged on the fixed curved bar (44).

3. A simple rice thresher according to claim 2, characterized in that: A plurality of the fixed curved strips (44) are arranged on the threshing main roller (42) in a spiral shape, and the spiral direction of the fixed curved strips (44) is the same as the rotation direction of the threshing main roller (42).

4. A simple rice thresher according to claim 2, characterized in that: The threshing device (4) further comprises a rotating end cover (46), wherein the rotating end cover (46) is rotatably arranged on a side of the frame (1) close to the feed inlet (21); a rotating ring (47), the rotating ring (47) being rotatably disposed on a side of the frame (1) away from the feed port (21); A plurality of rotating rods (48), wherein the plurality of rotating rods (48) are arranged in a ring shape between the rotating end cover (46) and the rotating ring (47).

5. A simple rice thresher according to claim 4, characterized in that: The threshing device (4) further comprises a plurality of kneading bars (49), wherein the plurality of kneading bars (49) are arranged at equal intervals on the outer wall of the rotating rod (48), and the rotating rod (48) is rotatably arranged between the rotating end cover (46) and the rotating ring (47).

6. A simple rice thresher according to claim 4, characterized in that: The screening device (3) comprises a screen (31), and the screen (31) is arranged below the threshing device (4); a rotating shaft (32), the rotating shaft (32) being rotatably disposed on the frame (1) and being disposed on a side of the screen (31) away from the waste discharging device (6); A plurality of fan blades (33), wherein the plurality of fan blades (33) are arranged in a ring shape on the rotating shaft (32).

7. A simple rice thresher according to claim 6, characterized in that: The screening device (3) further comprises a lifting frame (34), wherein the lifting frame (34) is disposed around the screen (31); A lifting ring groove (35), wherein the lifting ring groove (35) is provided on the frame (1), and the lifting frame (34) is slidably provided in the lifting ring groove (35); A plurality of springs (36) are arranged at equal intervals between the top of the lifting frame (34) and the inner top wall of the lifting ring groove (35).

8. The simple rice thresher according to claim 6, characterized in that: The material discharge device (5) comprises a receiving hopper (51), the receiving hopper (51) being arranged below the screen (31), the rotating shaft (32) being arranged on one side of the receiving hopper (51), and the waste discharge device (6) being arranged on the side of the receiving hopper (51) away from the rotating shaft (32); A material discharge pipe (52), wherein the material discharge pipe (52) is arranged below the material receiving hopper (51) and passes through a side wall of the frame (1).

9. A simple rice thresher according to claim 8, characterized in that: The waste discharge device (6) comprises a first discharge pipe (61), wherein the first discharge pipe (61) is arranged on a side of the threshing area (43) away from the feed port (21); A second discharge pipe (62), the second discharge pipe (62) is arranged obliquely downward and is connected to the receiving hopper (51).

10. The simple rice thresher according to claim 6, characterized in that: It also includes a transmission device (7), the transmission device (7) including a first belt pulley (71), the first belt pulley (71) being coaxially fixed on the output shaft of the threshing motor (41); a transmission shaft (72), the transmission shaft (72) being coaxially connected to the threshing main roller (42) and rotatably disposed on the frame (1); A second belt pulley (73), wherein the second belt pulley (73) is sleeved on the transmission shaft (72); a third pulley (74), the third pulley (74) being coaxially sleeved on the rotating shaft (32); a transmission belt (75), the transmission belt (75) being in transmission connection with the first belt pulley (71), the second belt pulley (73), and the third belt pulley (74); A driving gear (76), the driving gear (76) being coaxially sleeved on the transmission shaft (72); a gear ring (77), the gear ring (77) being arranged on the inner wall of the rotating end cover (46); At least three transmission gears (78), the three transmission gears (78) are arranged on the rotating end cover (46) at equal intervals and can rotate on the rotating end cover (46), and the transmission gears (78) are meshed with the driving gear (76) and the ring gear (77).

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