Simple rice thresher

Abstract

The application discloses a simple rice thresher, and relates to the technical field of agricultural equipment, which comprises a rack, a feeding cover arranged on the rack and forming a feeding port with 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, a discharging device arranged on the rack and connected with the screening device, and a waste discharging device arranged on the rack and connected with the screening device and the threshing device. The simple rice thresher can realize flexible threshing of rice ears, ensure complete threshing, reduce grain breakage, and guarantee rice quality.

Description

Technical Field

[0001] This invention relates to the field of agricultural equipment technology, specifically a simple rice threshing machine. Background Technology

[0002] Rice is one of my country's main food crops. After harvesting, it needs to be threshed to separate the grains from the straw. Traditionally, rice threshing relies on manual labor, where the rice ears are threshed against a threshing board to separate the grains from the ears. This method is extremely labor-intensive, inefficient, and produces inconsistent threshing results. To improve rice threshing efficiency, threshing machines are generally used.

[0003] Existing rice threshers generally use rigid spiked or plate-tooth threshing drums. Although they can complete the threshing operation, the threshing process involves direct collision between rigid components such as rigid spiked or plate-tooth threshing drums and rice ears, which can easily lead to grain breakage and reduce the actual output of rice. At the same time, incomplete threshing of rice ears can easily result in a lot of waste. Summary of the Invention

[0004] The purpose of this invention is to provide a simple rice threshing machine that can achieve flexible threshing of rice ears, ensuring complete threshing while reducing grain damage and protecting rice quality.

[0005] The above-mentioned optimized structure of the present invention is achieved through the following technical solution: a simple rice threshing machine, including a frame; A feed cover is provided on the frame and forms a feed inlet with the frame; A screening device is disposed between the frame and the feed cover; A threshing device is provided above the screening device and connected to the feed inlet; A feeding device is mounted on the frame and connected to the screening device; Waste discharge device, which is mounted on the frame and connected to the screening device and the threshing device.

[0006] In some embodiments, the threshing device includes a threshing motor, which is disposed on one side of the frame; The threshing main roller is rotatably mounted inside the frame and positioned above the screening device. The threshing main roller, the feed cover, and the screening device form a threshing zone. One side of the threshing zone is connected to the feed inlet, and the other side is connected to the waste discharge device. Multiple fixed curved strips are arranged in a ring on the threshing main roller; A flexible threshing bar, which is detachably mounted on the fixed curved bar.

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

[0008] In some embodiments, the threshing device further includes a rotating end cover, which is rotatably disposed on the side of the frame near the feed inlet; A rotating ring, which is rotatably disposed on the side of the frame away from the feed inlet; Multiple rotating rods are arranged in a ring between the rotating end cap and the rotating ring.

[0009] In some embodiments, the threshing device further includes multiple kneading strips, which are equally spaced on the outer wall of the rotating rod, and the rotating rod is rotatably disposed between the rotating end cover and the rotating ring.

[0010] In some embodiments, the screening device includes a screen disposed below the threshing device; A rotating shaft is rotatably mounted on the frame and located on the side of the screen away from the waste discharge device; Multiple fan blades are arranged in a ring on the rotating shaft.

[0011] In some embodiments, the screening device further includes a lifting frame surrounding the screen mesh; A lifting ring groove is provided on the frame, and the lifting frame is slidably disposed within the lifting ring groove; Multiple springs are provided at equal intervals between the top of the lifting frame and the inner top wall of the lifting ring groove.

[0012] In some embodiments, the feeding device includes a receiving hopper, which is disposed below the screen. The rotating shaft is provided on one side of the receiving hopper, and the waste discharge device is provided on the side of the receiving hopper away from the rotating shaft. The feeding pipe is located below the receiving hopper and penetrates one side wall of the frame.

[0013] In some embodiments, the waste discharge device includes a first discharge pipe, which is located on the side of the threshing zone away from the feed inlet; The second discharge pipe is arranged at an angle downward and is connected to the receiving hopper.

[0014] In some embodiments, a transmission device is also included, the transmission device including a first pulley, the first pulley being coaxially fixed on the output shaft of the threshing motor; A drive shaft is coaxially connected to the threshing main roller and is rotatably mounted on the frame; The second pulley is sleeved on the drive shaft; The third pulley is coaxially sleeved on the rotating shaft; A drive belt is connected to the first pulley, the second pulley, and the third pulley. A drive gear, which is coaxially sleeved on the transmission shaft; A gear ring, the gear ring being disposed on the inner wall of the rotating end cover; At least three transmission gears are provided at equal intervals on the rotating end cover and can rotate on the rotating end cover. The transmission gears mesh with the driving gear and the gear ring.

[0015] The above-described technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: This invention features multiple fixed curved strips and flexible threshing strips arranged in a spiral pattern on the main threshing roller, with the spiral direction aligned with the rotation direction of the main threshing roller. This allows the rice ears to move along the spiral direction within the threshing zone, extending the threshing time and improving the threshing effect. Furthermore, by combining the rigid contact of the fixed curved strips with the flexible contact of the flexible threshing strips, the rice grains can be separated from the rice ears through striking and kneading without damaging them. This increases the uniformity and thoroughness of threshing while reducing grain breakage and ensuring rice quality.

[0016] This invention features multiple rotatable rotating rods outside the main threshing roller, with kneading strips mounted on these rods. The rotating rods rotate in the opposite direction to the main threshing roller. The kneading strips further knead and separate the rice ears, thereby improving threshing efficiency and cleanliness. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4This is a schematic diagram of the transmission connection structure in the threshing device of the present invention.

[0019] In the diagram: 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 zone; 44. Fixed curved strip; 45. Flexible threshing strip; 46. Rotating end cover; 47. Rotating ring; 48. Rotating rod; 49. Kneading strip; 5. Discharging device; 51. Collecting hopper; 52. Discharging pipe; 6. Waste discharge device; 61. First discharge pipe; 62. Second discharge pipe; 7. Transmission device; 71. First pulley; 72. Transmission shaft; 73. Second pulley; 74. Third pulley; 75. Transmission belt; 76. Drive gear; 77. Gear ring; 78. Transmission gear. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

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

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] refer to Figure 1-4 A simple rice threshing machine includes a frame 1, a feed cover 2, a screening device 3, a threshing device 4, a feeding device 5, a waste discharge device 6, and a transmission device 7. The frame 1 is the supporting structure of the entire threshing machine and can be welded from high-strength steel, providing good stability and load-bearing capacity. The feed cover 2 is installed on the top of the frame 1, forming a feed inlet 21 together with the frame 1. The feed cover 2 can be made of stainless steel and has a certain curvature to intercept rice grains during the threshing process, guiding them along a predetermined path. The size of the feed inlet 21 is designed according to actual needs, facilitating the operator to feed the rice ears into the machine. The feed cover 2 can be a flip-top structure, with one side hinged to the frame 1 and the other side detachably connected by screws or other structures, so as to facilitate opening the feed cover 2 for maintenance of the thresher. The screening device 3 is located between the frame 1 and the feed cover 2, which can separate rice grains from rice straw. The threshing device 4 is located above the screening device 3 and connected to the feed inlet 21, which can thresh rice ears. The discharge device 5 is located on the frame 1 and connected to the screening device 3, which can collect the screened rice grains. The waste discharge device 6 is located on the frame 1 and connected to the screening device 3 and the threshing device 4, which is used to discharge waste such as rice straw.

[0025] In some embodiments, the threshing device 4 includes a threshing motor 41, a main threshing roller 42, multiple fixed curved strips 44, and flexible threshing strips 45. The threshing motor 41 is located 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 to the main threshing roller 42 and the rotating shaft 32. The main threshing roller 42 is laterally rotatable within the frame 1 and is located above the screening device 3. Both ends of the main threshing roller 42 can be connected to the frame 1 through bearings to achieve flexible rotation. The main threshing roller 42, the feed cover 2, and the screening device 3 form a threshing zone 43. One side of the threshing zone 43 is connected to the feed inlet 21, and the other side is connected to the waste discharge device 6. Multiple fixed curved strips 44 are arranged in a ring or spiral on the main threshing roller 42, with the spiral direction of the fixed curved strips 44 being the same as the rotation direction of the main threshing roller 42. The fixed curved strips 44 can be made of high-strength steel and are fixed to the main threshing roller 42 by welding or bolting. The spiral design of the fixed curved strips 44 allows the rice ears to move along the spiral direction within the threshing zone, increasing threshing time and efficiency. Simultaneously, it guides the rice stalks and other waste materials after threshing, preventing them from clogging the threshing zone and affecting the threshing of the rice ears. Flexible threshing strips 45 are detachably mounted on the fixed curved strips 44. The flexible threshing strip 45 can be made of flexible materials such as rubber or silicone. The surface of the flexible threshing strip 45 has a certain degree of roughness, which increases the friction between the flexible threshing strip 45 and the rice ear, thus effectively separating the rice grains from the ear without damaging them. One end of the fixed curved strip 44 can be provided with a T-shaped placement groove, into which the flexible threshing strip 45 can be inserted and fitted. A snap-fit ​​structure is provided at the opening of the fixed curved strip 44, allowing for easy replacement of the flexible threshing strip 45 after it wears out.

[0026] In the threshing zone 43, the rice ears are subjected to the combined forces of the main threshing roller 42, the fixed curved strips 44, and the flexible threshing strips 45. The rotation of the main threshing roller 42 drives the fixed curved strips 44 and the flexible threshing strips 45 to rub and beat the rice ears. While the flexible threshing strips 45 apply force to the rice ears, the rice ears also generate a reaction force against the flexible threshing strips 45. Because the flexible threshing strips 45 have a certain degree of flexibility, they can buffer and absorb the impact force to a certain extent, thereby reducing damage to the rice. At the same time, the spirally distributed fixed curved strips 44, during rotation, not only generate axial thrust on the rice ears but also radial centrifugal force, causing the rice ears to continuously tumble and collide within the threshing zone 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 mounted on the side of the frame 1 near the feed inlet 21 and can be connected to the frame 1 via bearings. The rotating ring 47 is rotatably mounted on the side of the frame 1 away from the feed inlet 21 and can also be connected to the frame 1 via bearings. The multiple rotating rods 48 are arranged in a ring between the rotating end cover 46 and the rotating ring 47. The rotating end cover 46, the rotating ring 47, and the multiple rotating rods 48 work together to form an auxiliary threshing structure. By rotating the rotating end cover 46, the multiple rotating rods 48 can be driven to rotate outside the threshing main roller 42, so that the rice ears in the threshing zone 43 are subjected to the joint 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, which are evenly spaced on the outer wall of the rotating rod 48. The kneading strips 49 can be made of materials such as plastic or rubber, and can be long strips with certain protrusions or textures on the surface to enhance the kneading effect on the rice ears and improve threshing efficiency. The rotating rod 48 is rotatably positioned between the rotating end cover 46 and the rotating ring 47. The rotation of the rotating rod 48 drives the rotation of the kneading strips 49, thereby creating a stir-fry-like action in the threshing zone 43 to further knead the rice ears. The direction of the force exerted by the kneading strips 49 is at a certain angle to the direction of movement of the rice ears, forming a tangential force, which helps to break the bonding force between the rice ears and the rice grains, thereby improving the uniformity of the frictional force on the rice ears and the uniformity of threshing, thus ensuring complete threshing of the rice grains.

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

[0030] In some embodiments, the screening device 3 includes a screen 31, a rotating shaft 32, and multiple fan blades 33. The screen 31 is located below the threshing device 4. The screen 31 can be made of woven stainless steel wire and has a suitable mesh size, which can ensure that the rice grains pass through smoothly and intercept straw, husks and other debris. The screen 31 can be arc-shaped to facilitate cooperation with the threshing device 4 and form a uniform flow channel in the threshing zone 43. The rotating shaft 32 is rotatably mounted on the frame 1 and is located on the side of the screen 31 away from the waste discharge device 6. The rotating shaft 32 can be connected to the frame 1 through bearings to reduce the friction when the rotating shaft 32 rotates. Multiple fan blades 33 are arranged in a ring 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 generate wind power, which blows the lighter debris after threshing toward the waste discharge 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 may be made of steel to ensure the strength and rigidity of the lifting frame 34. The lifting ring groove 35 is provided on the frame 1, and the lifting frame 34 can be slidably provided 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-section of the lifting frame 34 and the lifting ring groove 35 may be convex to avoid separation between the lifting frame 34 and the lifting ring groove 35. A plurality of springs 36 are equally spaced between the top of the lifting frame 34 and the inner top wall of the lifting ring groove 35. Spring 36 can be a helical spring with a suitable elastic coefficient. When vibration occurs during the threshing process, spring 36 will play a role in buffering and shock absorption, while causing screen 31 to vibrate up and down. This causes the rice and impurities to jump continuously on screen 31, increasing the contact opportunity between the rice and the screen, improving the screening effect, and preventing the accumulation of impurities on screen 31, ensuring the smooth flow of rice.

[0032] In some embodiments, the feeding device 5 includes a receiving hopper 51 and a feeding pipe 52. The receiving hopper 51 is located below the screen 31 and may be funnel-shaped with a large opening at the top to collect rice grains falling from the screen 31. A rotating shaft 32 is provided on one side of the receiving hopper 51, and a waste discharge device 6 is provided on the side of the receiving hopper 51 away from the rotating shaft 32. The feeding pipe 52 is located below the receiving hopper 51, connected to the bottom opening of the receiving hopper 51, and penetrates through one side wall of the frame 1, guiding the rice grains to the outside of the frame 1 for easy collection. The diameter of the feeding pipe 52 is designed according to the flow rate of the rice grains, and can transport the collected rice grains to a storage container.

[0033] In some embodiments, the waste discharge device 6 includes a first discharge pipe 61 and a second discharge pipe 62. The first discharge pipe 61 is located on the side of the threshing zone 43 away from the feed inlet 21 and is connected to the threshing zone 43. The first discharge pipe 61 is used to discharge larger debris such as rice straw after threshing. The second discharge pipe 62 is arranged obliquely downward and connected to the receiving hopper 51 to discharge waste that failed to pass through the screen during the screening process. Under the wind force generated by the fan blades 33, lighter debris after threshing, such as rice husks and dust, will be discharged through the second discharge 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 drive 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 rotatably mounted on the frame 1. The transmission shaft 72 can be connected to the frame 1 via bearings to reduce friction during rotation. The second pulley 73 is sleeved on the transmission shaft 72 and is connected to the first pulley 71 via the transmission belt 75. When the threshing motor 41 rotates, it drives the transmission shaft 72 and the threshing main roller 42 to rotate via the transmission belt 75. The third pulley 74 is coaxially sleeved on the rotating shaft 32 and is also connected to the first pulley 71 via the transmission belt 75. In this way, the power of the threshing motor 41 can be transmitted simultaneously to the threshing main roller 42 and the rotating shaft 32. Belt drive has the characteristics of smooth transmission and shock absorption, which can buffer load impact and achieve smooth transmission.

[0035] The drive gear 76 is coaxially mounted on the drive shaft 72 and rotates as the drive shaft 72 rotates. The gear ring 77 is disposed on the inner wall of the rotating end cover 46 and meshes with the drive gear 76 through at least three drive gears 78. When the drive gear 76 rotates, it drives the gear ring 77 and the rotating end cover 46 to rotate through the drive gears 78, thereby causing the rotating rod 48 to rotate in the opposite direction to the threshing main roller 42.

[0036] When the main threshing roller 42 rotates in the forward direction, driving the flexible threshing strips 45 to rotate in a spiral, the rotating end cover 46 will drive the rotating rod 48 to rotate in the reverse direction through the transmission between the drive gear 76, the transmission gear 78 and the gear ring 77. This will form a biomimetic flexible threshing structure between the main threshing roller 42 and the multiple rotating rods 48. Through friction and collision with the rice ears, the rice grains will be separated from the rice ears, thus achieving low-damage threshing and high-efficiency separation.

[0037] Specifically, the rotation of the main threshing roller 42 causes the material in contact with it to rotate, thus subjecting it to centripetal force and causing it to tend to move away from the main threshing roller 42. Due to the different masses of the rice grains, rice ears, and rice straw, a stratification effect occurs under the same centrifugal force. The heavier rice grains break free from the constraints of the flexible threshing bars 45 under centrifugal force and move outward in a parabolic trajectory. At this time, the reverse rotation of the rotating rod 48 generates a reverse shearing force, further peeling off the grains attached to the rice ears, achieving low-damage threshing. The lighter rice straw, due to insufficient inertia, continues to move in the direction of rotation of the main threshing roller 42. The spiral layout of the flexible threshing bars 45 generates axial thrust, continuously pushing these materials to the end of the threshing area, preventing accumulation and blockage.

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

[0039] The drive gear 76 drives the transmission gear 78 to mesh with the gear ring 77, causing the rotating end cover 46 to rotate in the opposite direction. The kneading strip 49 on the rotating rod 48 forms a reverse shearing motion with the threshing main roller 42.

[0040] The operator feeds rice ears into the threshing machine through the feed inlet 21. The ears, under the rotation of the main threshing roller 42, enter the threshing zone 43, which is formed by the main threshing roller 42, the feed cover 2, and the screening device 3. The spiral arrangement of the fixed curved strips 44 guides the rice ears along the axial direction of the main threshing roller 42, increasing threshing time and efficiency, and preventing waste such as rice straw from clogging the threshing zone 43. The flexible threshing strips 45 generate friction with the rice ears as the main threshing roller 42 rotates, separating the rice grains from the ears. Simultaneously, the kneading strips 49 on the rotating rod 48 knead the rice ears during rotation, 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 the rice ears, rice grains and other materials to tend to move away from the threshing main roller 42 due to centrifugal force. The heavier rice grains break through the constraints of the flexible threshing strips 45 and move outward under centrifugal force. The reverse shearing force of the rotating rod 48 further separates the grains, achieving low-damage threshing. The lighter rice stalks move with the rotation direction of the threshing main roller 42 due to insufficient inertia. The spiral layout of the flexible threshing strips 45 generates axial thrust, pushing them to the end of the threshing zone 43. The larger impurities such as rice stalks after threshing are discharged through the first discharge pipe 61.

[0042] The threshed mixture falls onto the screen 31 below. The vibration during the threshing process causes the spring 36 to drive the screen 31 to vibrate up and down, thereby preventing straw, husks and other debris from accumulating on the screen 31 and clogging it, and making it easier for the rice to pass through the screen 31.

[0043] After being screened by screen 31, the mixture flows down to the funnel-shaped receiving hopper 51 under its own gravity. As the mixture descends, the rotating shaft 32 drives the fan blades 33 to rotate, generating wind that blows lighter impurities (such as rice husks and dust) into the second discharge pipe 62, from which they are discharged. The rice that has been air-separated enters the receiving hopper 51 and eventually slides down the discharge pipe 52 into the storage container, thus collecting the rice.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions 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 threshing machine, characterized in that: Including rack (1); Feed cover (2), the feed cover (2) is provided on the frame (1) and forms a feed port (21) with the frame (1). Screening device (3), the screening device (3) is located between the frame (1) and the feed cover (2); A threshing device (4) is located above the screening device (3) and connected to the feed inlet (21); Feeding device (5), the feeding device (5) is mounted on the frame (1) and connected to the screening device (3); Waste discharge device (6), the waste discharge device (6) is mounted on the frame (1) and connected to the screening device (3) and the threshing device (4); The threshing device (4) includes a threshing motor (41), which is located on one side of the frame (1); The threshing main roller (42) is rotatably mounted in the frame (1) and above the screening device (3). The threshing main roller (42), the feed cover (2), and the screening device (3) form a threshing zone (43). One side of the threshing zone (43) is connected to the feed inlet (21), and the other side is connected to the waste discharge device (6). Multiple fixed curved strips (44) are arranged in a ring on the threshing main roller (42); A flexible threshing strip (45) is detachably mounted on the fixed curved strip (44); The threshing device (4) also includes a rotating end cover (46), which is rotatably disposed on the side of the frame (1) near the feed inlet (21); Rotating ring (47), the rotating ring (47) is rotatably disposed on the side of the frame (1) away from the feed inlet (21); Multiple rotating rods (48) are arranged in a ring between the rotating end cap (46) and the rotating ring (47).

2. The simple rice thresher according to claim 1, characterized in that: Multiple fixed curved strips (44) are spirally arranged on the threshing main roller (42), and the spiral direction of the fixed curved strips (44) is the same as the rotation direction of the threshing main roller (42).

3. The simple rice thresher according to claim 1, characterized in that: The threshing device (4) also includes multiple kneading strips (49), which are equally spaced on the outer wall of the rotating rod (48), and the rotating rod (48) is rotatably disposed between the rotating end cover (46) and the rotating ring (47).

4. A simple rice thresher according to claim 1, characterized in that: The screening device (3) includes a screen (31), which is located below the threshing device (4); Rotating shaft (32), the rotating shaft (32) is rotatably mounted on the frame (1) and is located on the side of the screen (31) away from the waste discharge device (6); Multiple fan blades (33) are arranged in a ring on the rotating shaft (32).

5. A simple rice thresher according to claim 4, characterized in that: The screening device (3) also includes a lifting frame (34), which is arranged around the screen (31); Lifting ring groove (35), 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); Multiple springs (36) are evenly spaced between the top of the lifting frame (34) and the inner top wall of the lifting ring groove (35).

6. A simple rice thresher according to claim 4, characterized in that: The feeding device (5) includes a receiving hopper (51), which is located below the screen (31). The receiving hopper (51) has the rotating shaft (32) on one side and the waste discharge device (6) on the side of the receiving hopper (51) away from the rotating shaft (32). The feeding pipe (52) is located below the receiving hopper (51) and passes through one side wall of the frame (1).

7. A simple rice thresher according to claim 6, characterized in that: The waste discharge device (6) includes a first discharge pipe (61), which is located on the side of the threshing zone (43) away from the feed inlet (21); The second discharge pipe (62) is arranged obliquely downward and connected to the receiving hopper (51).

8. A simple rice thresher according to claim 4, characterized in that: It also includes a transmission device (7), which includes a first pulley (71) and is coaxially fixed on the output shaft of the threshing motor (41); A drive shaft (72) is coaxially connected to the threshing main roller (42) and is rotatably mounted on the frame (1); The second pulley (73) is sleeved on the drive shaft (72); The third pulley (74) is coaxially sleeved on the rotating shaft (32); A drive belt (75) is connected to the first pulley (71), the second pulley (73) and the third pulley (74). A drive gear (76) is coaxially sleeved on the transmission shaft (72); Gear ring (77), the gear ring (77) is disposed on the inner wall of the rotating end cover (46); At least three transmission gears (78) are equally spaced on the rotating end cover (46) and can rotate on the rotating end cover (46). The transmission gears (78) mesh with the driving gear (76) and the gear ring (77).

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