A grain thresher

Abstract

The utility model discloses a kind of grain threshing machines, it is related to grain production and processing equipment technical field, and the top of fixed support is fixedly provided with threshing box, and the inclined screen is provided on fixed support and below threshing box;Threshing box includes the box body fixedly set in the top of fixed support, the bottom of box body is provided with blanking port, and the filter screen plate with semicircular end is provided on fixed support and at blanking port, the rotating shaft is rotationally arranged in the inside of box body and above filter screen plate, a plurality of square plates are fixedly arranged on rotating shaft, fixed shaft is fixedly arranged between the corner of square plate, a plurality of sliding sleeves are slidably arranged on fixed shaft, and stirring rod is fixedly arranged on the side of sliding sleeve.The utility model uses flexible stirring threshing mechanism, realizes flexible beating to grain by the cooperation of stirring rod and return spring which can move radially, effectively reduces kernel damage rate in threshing process, and guarantees the integrity of grain.

Description

Technical Field

[0001] This utility model relates to the technical field of grain production and processing equipment, specifically a grain thresher. Background Technology

[0002] In agricultural production, grain threshing is a crucial processing step after harvesting. Traditional grain threshers mostly use rigid impact components, such as fixed spikes or slats, to thresh the grain through high-speed rotation and strong impact. While these machines offer high threshing efficiency, a common problem is excessive impact force and a single action method, which easily causes grain breakage and damage to the outer skin, especially for fragile grains like rice and oats, where the damage rate is even more significant. Grain damage not only lowers the grain grade and market price but also makes it more susceptible to mold during storage, affecting germination rates and causing economic losses.

[0003] In the existing technology, although some equipment attempts to introduce elastic elements or buffer structures to reduce impact, such as adding rubber sleeves to the threshing rod or using cantilever elastic rods, these improvements are often complex in structure and lack durability. They are difficult to achieve continuous and uniform flexible treatment of grains throughout the threshing area, and the threshing quality and stability still need to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a grain threshing machine that can significantly reduce grain damage rate, improve grain processing quality, and reduce losses while efficiently threshing grains.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A grain thresher includes a fixed support, a threshing box is fixedly mounted on the top of the fixed support, and a screen is inclinedly mounted on the fixed support and below the threshing box.

[0007] The threshing box includes a box body fixedly mounted on top of a fixed support. A material discharge port is located at the bottom of the box body. A filter screen plate with a semi-circular end is mounted on the fixed support at the material discharge port. The filter screen plate and the inner side of the box body form a cavity. A rotating shaft is rotatably mounted inside the box body above the filter screen plate. Multiple square plates are fixedly mounted on the rotating shaft. A fixed shaft is fixedly mounted between the corners of the square plates. Several sliding sleeves are slidably mounted on the fixed shaft. A stirring rod is fixedly mounted on the side of each sliding sleeve. Return springs are respectively mounted between the sliding sleeves and on the outside of the fixed shaft. A fixed plate is fixedly mounted between the corners of the square plates. Several threshing rods are evenly arranged on the outside of the fixed plate. A stirring blade is fixedly mounted at one end of the rotating shaft and on the outside of the square plates. A fan is fixedly connected to the end of the rotating shaft near the stirring blade. A material inlet is located on the side of the box body corresponding to the stirring blade. A debris outlet is located on the side of the box body away from the stirring blade.

[0008] In a preferred embodiment, the lower end of the screen is slidably connected to the fixed support laterally, a transverse spring is provided between the screen and the fixed support, a tension spring or elastic rope is connected between the higher end of the screen and the upper fixed support, and a pulling mechanism is connected to the outside of the higher end of the screen.

[0009] In a preferred embodiment, the pulling mechanism includes a first pulley rotatably mounted on the end of a fixed support. A connecting block is rotatably mounted on the outer side of the first pulley. A chain is hinged to the upper side of the connecting block. The end of the chain away from the connecting block is connected to the higher end of the screen. The middle part of the chain cooperates with a sprocket rotatably mounted on the fixed support.

[0010] In a preferred embodiment, a second pulley is fixedly mounted on one end of the rotating shaft near the first pulley. The second pulley is connected to the first pulley via a belt, and a drive motor is driven to the second pulley.

[0011] In a preferred embodiment, the bottom of the fixed bracket is provided with casters.

[0012] In a preferred embodiment, the fixing plate is inclined between the square plates.

[0013] In a preferred embodiment, a positioning plate is fixedly provided at one end of the fixed bracket, the bottom of the positioning plate is slidably connected to the inner side of the lower end of the screen, and a grain discharge port is provided on the side of the screen and inside the positioning plate.

[0014] In a preferred embodiment, the housing is provided with upper and lower parts, one side of the upper part of the housing is hinged to a fixed bracket, and a buckle is provided between the upper part of the housing and the side of the fixed bracket.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention employs a flexible stirring threshing mechanism. A radially movable stirring rod, combined with a return spring, achieves gentle impact on the grains, effectively reducing grain damage during threshing and ensuring grain integrity. The screen system utilizes a composite vibration design, combining the restoring force of the transverse spring and elastic rope with the periodic traction of the mechanical pulling mechanism to generate a highly efficient composite vibration trajectory, significantly improving the separation of grains and impurities. Airflow generated by a blower discharges lightweight debris from the debris outlet, while simultaneously assisting in material transport within the threshing chamber, achieving a clean and efficient operation. An inclined fixing plate optimizes the impact angle and trajectory of the detachment rod, improving threshing efficiency and uniformity, ensuring thorough and clean threshing. This system achieves fully automated continuous operation from feeding, threshing, cleaning to discharge, offering comprehensive advantages such as compact structure, high efficiency, low grain damage rate, and convenient operation and maintenance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. 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 this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model from another orientation;

[0020] Figure 3 This is a schematic diagram of the structure of the present invention without the box body;

[0021] Figure 4 This is a schematic diagram of the internal structure of the threshing box of the utility model.

[0022] Figure 5 For utility model Figure 2 A magnified structural diagram of part A;

[0023] Figure 6 This is a schematic diagram of the structure of the housing and filter screen of the utility model.

[0024] Figure reference numerals: 1-Fixed bracket, 2-Threshing box, 3-Screen, 4-Moving wheel, 5-Positioning plate, 6-Grain outlet, 7-Snap fastener, 21-Box body, 22-Discharge port, 23-Filter screen plate, 24-Rotating shaft, 25-Square plate, 26-Fixed shaft, 27-Sliding sleeve, 28-Stirring rod, 29-Return spring, 210-Fixed plate, 211-Threshing rod, 212-Stirring blade, 213-Fan, 214-Inlet, 215-Crushing outlet, 31-Transverse spring, 32-Elastic rope, 33-Pulling mechanism, 34-Second pulley, 35-Belt, 331-First pulley, 332-Connecting block, 333-Chain, 334-Sprocket. Detailed Implementation

[0025] The following embodiments will be described in detail with reference to the accompanying drawings. In the drawings and description, similar or identical parts are referred to by the same reference numerals. Furthermore, in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this utility model are merely illustrative and not intended to limit the scope of the utility model. Any obvious modifications or alterations made to this utility model do not depart from its spirit and scope.

[0026] Please see Figures 1 to 6

[0027] In this embodiment of the utility model, a grain threshing machine includes a fixed support 1, a threshing box 2 is fixedly installed on the top of the fixed support 1, and a screen 3 is inclinedly installed on the fixed support 1 and below the threshing box 2.

[0028] The threshing box 2 includes a box body 21 fixedly mounted on the top of a fixed support 1. A discharge port 22 is provided at the bottom of the box body 21. A filter screen plate 23 with a semi-circular end is provided on the fixed support 1 at the discharge port 22. The filter screen plate 23 and the inner side of the box body 21 form a cavity. A rotating shaft 24 is rotatably mounted inside the box body 21 above the filter screen plate 23. Multiple square plates 25 are fixedly mounted on the rotating shaft 24. A fixed shaft 26 is fixedly mounted between the corners of the square plates 25. Several sliding sleeves 27 are slidably mounted on the fixed shaft 26. A stirring rod 2 is fixedly mounted on the side of each sliding sleeve 27. 8. Return springs 29 are respectively provided between the sliding sleeves 27 and on the outside of the fixed shaft 26. A fixed plate 210 is fixedly provided between the outer corners of the square plate 25. Several threshing rods 211 are evenly provided on the outer side of the fixed plate 210. A stirring blade 212 is fixedly provided at one end of the rotating shaft 24 and on the outside of the square plate 25. A fan 213 is fixedly connected to the end of the rotating shaft 24 near the stirring blade 212. A feed inlet 214 is provided on the side of the box 21 corresponding to the position of the stirring blade 212. A debris outlet 215 is provided on the side of the box 21 away from the stirring blade 212.

[0029] The fixed bracket 1 of this utility model serves as a supporting structure, providing a stable foundation for the entire machine, and supporting components such as the threshing box 2 and the screen 3 through its top mounting surface. The inclined screen 3 is located below the threshing box 2, and its main function is to achieve preliminary separation and conveying of grains and impurities. The threshing box 2 is the device for threshing, and its box body 21 constitutes the working space. The box body 21 cooperates with the semi-circular filter plate 23 to form a cavity that can realize particle grading and screening; the rotating shaft 24 drives the square plate 25 and its multiple components to rotate, completing the threshing action. The stirring rod 28, which is mounted on the fixed shaft 26 through the sliding sleeve 27, can move radially. Under the action of the return spring 29, it enhances the flexible stirring effect and avoids hard impact damage to the grains; the stirring rod 28, the inclined fixed plate 210, and the threshing rod 211 on its outer side are jointly responsible for striking and threshing. The feed inlet 214 is set to correspond to the stirring blade 212 to realize the introduction and initial propulsion of materials; the blower 213 generates airflow to feed the introduced materials to the other end of the threshing box 2, and the airflow also works with the debris discharge port 215 to realize the discharge of debris and light impurities.

[0030] The lower end of the screen 3 is laterally slidably connected to the fixed support 1. A transverse spring 31 is provided between the screen 3 and the fixed support 1. An elastic rope 32 is connected between the higher end of the screen 3 and the upper fixed support 1. A pulling mechanism 33 is connected to the outside of the higher end of the screen 3. The screen 3 achieves transverse elastic vibration through the transverse sliding connection between its lower end and the fixed support 1 and the transverse spring 31. At the same time, its higher end is connected to the fixed support 1 via a tension spring or elastic rope 32, which together provide the system's restoring force. The pulling mechanism 33 connected to the outside of the higher end of the screen is used to apply periodic tension to it, assisting in the vibrating screening function.

[0031] The pulling mechanism 33 includes a first pulley 331 rotatably mounted on one end of the fixed bracket 1. A connecting block 332 is rotatably mounted on the outer side of the first pulley 331. A chain 333 is hinged to the upper side of the connecting block 332. The end of the chain 333 away from the connecting block 332 is connected to the higher end of the screen 3. The middle part of the chain 333 engages with a sprocket 334 rotatably mounted on the fixed bracket 1. The pulling mechanism 33 drives the connecting block 332 to move back and forth up and down through the rotation of the first pulley 331. In turn, through the engagement of the chain 333 and the sprocket 334, the pulling mechanism achieves a reciprocating pulling action on the screen 3, thereby driving the screen 3 to vibrate in a controllable mechanical manner.

[0032] A second pulley 34 is fixedly installed at one end of the rotating shaft 24 near the first pulley 331. The second pulley 34 is connected to the first pulley 331 via a belt 35, and a drive motor (not shown) is driven by the second pulley 34. The second pulley 34 is fixed to the end of the rotating shaft 24 and connected to the first pulley 331 via the belt 35, synchronously transmitting the power input from the drive motor to the threshing rotating shaft 24 and the pulling mechanism 33 of the screen 3, realizing dual functions driven by one machine, improving equipment integration and power efficiency.

[0033] The bottom of the fixed bracket 1 is equipped with casters 4. The casters 4 give the whole machine the ability to move, making it easy to move and adjust its position flexibly between different work locations.

[0034] The fixing plate 210 is inclined between the square plates 25. This is used to optimize the movement trajectory and impact angle of the threshing rod 211, thereby improving threshing efficiency and uniformity.

[0035] A positioning plate 5 is fixedly installed at one end of the fixed bracket 1. The bottom of the positioning plate 5 is slidably connected to the inner side of the lower end of the screen 3. A grain outlet 6 is provided on the side of the screen 3 and inside the positioning plate 5. The positioning plate 5 serves as a guide and limiter; the grain outlet 6 is used to collect and discharge the clean grains after screening.

[0036] The enclosure 21 has two parts, upper and lower. One side of the upper part of the enclosure 21 is hinged to the fixed bracket 1, and a buckle 7 is provided between the upper part of the enclosure 21 and the side of the fixed bracket 1. This allows the enclosure 21 to be opened, closed and locked quickly, facilitating internal maintenance, cleaning and troubleshooting.

[0037] The working process of this utility model is as follows:

[0038] The power is provided by a drive motor, which drives the first pulley 331 and the rotating shaft 24 inside the threshing box to rotate synchronously through the second pulley 34 and the belt 35, so that one power source can drive the two core functions of threshing and screening at the same time.

[0039] During operation, the grains to be threshed are fed into the threshing chamber 2 through the feed inlet 214. The rotating shaft 24 drives the stirring blades 212 on it to rotate, initially agitating and pushing the material. The blower 213 generates airflow to help blow the material into the chamber 1 for threshing. The threshing work is completed by the high-speed rotating square plate 25 assembly: the threshing rods 211 on the fixed plate 210 forcefully strike and knead the grains to achieve threshing; the stirring rods 28, which are mounted on the fixed shaft 26 through the sliding sleeve 27, move radially under the action of the return spring 29 to form flexible stirring, effectively striking the grains while avoiding damage to the grains.

[0040] The threshed mixture is initially screened through the filter screen 23. The grains fall from the discharge port 22, while lighter debris and short fibers are blown by the airflow of the blower 213 to the debris discharge port 215 at the other end of the housing 21 for discharge. The grains and larger impurities that have not been threshed fall onto the inclined screen 3 below.

[0041] The screening process is achieved through the combined vibration of the screen 3. Power is transmitted to the pulling mechanism 33 via a belt drive. The rotational motion of the first pulley 331 is converted into a reciprocating pulling motion on the higher end of the screen 3 through the connecting block 332 and the chain 333. At the same time, the lower end of the screen 3 is laterally elastically connected to the fixed bracket 1 through a transverse spring 31, and the other end is connected by an elastic rope 32. These two elastic elements, combined with the lifting action of the pulling mechanism 33, cause the screen to generate a combined vibration trajectory, efficiently separating the grains from impurities. The clean grains move along the screen surface of the screen 3 under the action of vibration and are finally collected and discharged through the grain outlet 6 located inside the positioning plate 5. The positioning plate 5 guides and limits the vibration of the screen, ensuring the stability of the movement.

[0042] The entire device can be moved flexibly using the casters 4 mounted on the bottom. When maintenance or cleaning is required, the latches 7 between the housing 21 and the fixed bracket 1 can be opened to allow access to the internal components around the hinge point.

[0043] This invention realizes fully automated continuous operation from feeding, threshing, cleaning to discharge, and features a compact structure, high working efficiency and low grain damage rate.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A grain thresher, characterized in that, Includes a fixed support (1), a threshing box (2) is fixedly installed on the top of the fixed support (1), and a screen (3) is inclinedly installed on the fixed support (1) and below the threshing box (2); The threshing box (2) includes a box body (21) fixedly mounted on the top of a fixed support (1). A material discharge port (22) is provided at the bottom of the box body (21). A filter screen plate (23) with a semi-circular end is provided on the fixed support (1) at the material discharge port (22). The filter screen plate (23) and the inner side of the box body (21) form a cavity. A rotating shaft (24) is rotatably mounted inside the box body (21) and above the filter screen plate (23). Multiple square plates (25) are fixedly mounted on the rotating shaft (24). A fixed shaft (26) is fixedly mounted between the corners of the square plates (25). A number of sliding sleeves (27) are slidably mounted on the fixed shaft (26). An agitator is fixedly mounted on the side of the sliding sleeve (27). A return spring (29) is provided between the stirring rod (28) and the sliding sleeve (27) and located outside the fixed shaft (26). A fixed plate (210) is fixedly provided between the corners of the square plate (25). Several threshing rods (211) are evenly provided on the outside of the fixed plate (210). A stirring blade (212) is fixedly provided at one end of the rotating shaft (24) and located outside the square plate (25). A blower (213) is fixedly connected to one end of the rotating shaft (24) near the stirring blade (212). A feed inlet (214) is provided on the side of the box (21) corresponding to the stirring blade (212). A debris outlet (215) is provided on the side of the box (21) away from the stirring blade (212).

2. The grain thresher according to claim 1, characterized in that: The lower end of the screen (3) is slidably connected to the fixed bracket (1) laterally. A transverse spring (31) is provided between the screen (3) and the fixed bracket (1). A tension spring or elastic rope (32) is connected between the higher end of the screen (3) and the upper fixed bracket (1). A pulling mechanism (33) is connected to the outside of the higher end of the screen (3).

3. A grain thresher according to claim 2, characterized in that: The pulling mechanism (33) includes a first pulley (331) rotatably disposed on the end side of the fixed bracket (1), a connecting block (332) rotatably disposed on the outer side of the first pulley (331), a chain (333) hinged to the upper side of the connecting block (332), the end of the chain (333) away from the connecting block (332) being connected to the higher end of the screen (3), and the middle part of the chain (333) cooperating with a sprocket (334) rotatably disposed on the fixed bracket (1).

4. A grain thresher according to claim 3, characterized in that: The shaft (24) is fixedly provided with a second pulley (34) at one end near the first pulley (331). The second pulley (34) is connected to the first pulley (331) via a belt (35). The second pulley (34) is connected to a drive motor.

5. A grain thresher according to claim 1, characterized in that: The bottom of the fixed bracket (1) is provided with casters (4).

6. A grain thresher according to claim 1, characterized in that: The fixing plate (210) is inclined between the square plates (25).

7. A grain thresher according to claim 4, characterized in that: A positioning plate (5) is fixedly installed at one end of the fixed bracket (1). The bottom of the positioning plate (5) is slidably connected to the inner side of the lower end of the screen (3). A grain outlet (6) is provided on the side of the screen (3) and inside the positioning plate (5).

8. A grain thresher according to claim 1, characterized in that: The box (21) is provided with upper and lower parts. One side of the upper part of the box (21) is hinged to the fixed bracket (1), and a buckle (7) is provided between the upper part of the box (21) and the side of the fixed bracket (1).

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