A maize seed threshing device

Abstract

The utility model discloses a corn seed threshing device, including frame, be provided with processing bin on the frame, the upper end of processing bin is provided with feed hopper, its lower end is provided with the discharge hopper, is provided with the threshing roller in processing bin, and one end of threshing roller projects processing bin and is provided with driven sheave, still be provided with speed reducer motor on the frame, and the output shaft of speed reducer motor is fixed with driving sheave, be provided with the tensioning adjusting mechanism on the frame, the tensioning adjusting mechanism that the utility model sets, through the drive link rod rotation of speed reducer no.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to a corn seed threshing device used in agricultural production and corn seed processing. This device can achieve efficient and low-damage threshing of corn seeds, meet the needs of large-scale corn seed processing, and provide strong support for subsequent seed screening, storage, sowing, and ensuring crop yield. Background Technology

[0002] In agricultural production and corn seed processing, corn seed threshing is a crucial step. The quality and efficiency of corn seed threshing directly affect subsequent seed selection, storage, sowing, and crop yield. Traditional corn seed threshing methods are mainly divided into two types: manual threshing and mechanical threshing.

[0003] Manual threshing typically relies on manual tools to pound and rub the corn ears. This method is not only labor-intensive, consuming a lot of manpower and time, but also has extremely low threshing efficiency, making it difficult to meet the needs of large-scale corn seed processing. Furthermore, during the threshing process, it is difficult to control the force of manual operation, which can easily damage the corn seeds, reduce the germination rate and quality, and cause significant economic losses to agricultural production.

[0004] With the development of agricultural mechanization, mechanical threshing has gradually replaced manual threshing as the mainstream method. Currently, there are many types of corn seed threshing devices on the market, but most have some shortcomings. Some threshing devices have poorly designed transmission mechanisms, using fixed drive wheel structures. Over long-term use, the belts are prone to loosening, leading to decreased transmission efficiency, unstable threshing roller speed, and consequently affecting the threshing effect, resulting in incomplete threshing or increased seed breakage. Furthermore, when belt loosening requires adjustment, it often necessitates manual disassembly of relevant components, which is cumbersome, time-consuming, and affects the normal operating efficiency of the equipment. Utility Model Content

[0005] The purpose of this invention is to overcome the problems of low transmission efficiency and cumbersome belt adjustment in existing corn seed threshing devices, and to provide a corn seed threshing device that can realize automatic and convenient belt tension adjustment, ensure stable transmission efficiency, and improve threshing efficiency and quality.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A corn seed threshing device includes a frame, a processing chamber on the frame, a feed hopper at the upper end of the processing chamber, a discharge hopper at the lower end of the processing chamber, a threshing roller inside the processing chamber, a driven roller extending out of the processing chamber at one end, a geared motor on the frame, a drive roller fixed to the output shaft of the geared motor, and a tension adjustment mechanism on the frame.

[0008] The tension adjustment mechanism includes a U-shaped support fixed on the frame, a rotating rod running through the U-shaped support, a geared motor fixed to the side wall of the U-shaped support, the output shaft of the geared motor fixedly connected to the rotating rod, external threads in opposite directions at both ends of the rotating rod, a left guide block and a right guide block threaded onto the external threads in opposite directions, a protective cover on the U-shaped support outside the rotating rod, the left guide block and the right guide block slidingly connected to the protective cover, a left tension roller and a right tension roller fixed on the left guide block and the right guide block respectively, and the driving wheel, the driven wheel, the left tension roller and the right tension roller are connected by a belt.

[0009] Several sets of threshing teeth are evenly arranged on the outer circumferential wall of the threshing roller. Each set of threshing teeth includes at least 3 threshing teeth distributed in a spiral shape, and the distance between two adjacent sets of threshing teeth is 5-8 mm.

[0010] The feed hopper is equipped with an inclined guide plate with an angle of 30-45° between the guide plate and the inner wall of the feed hopper. The surface of the guide plate is provided with several arc-shaped protrusions with a height of 2-3mm.

[0011] Several guide rails are fixed on the inner wall of the protective cover. Guide grooves that are compatible with the guide rails are respectively provided on the outer walls of the left and right guide blocks. The guide rails are slidably connected to the guide grooves, and limit blocks are provided at both ends of the guide rails. The limit blocks are fixedly connected to the inner wall of the protective cover.

[0012] The outer circumferential walls of the driving pulley, driven pulley, left tension roller, and right tension roller are all provided with annular grooves. The cross-section of the annular groove is arc-shaped, and the width of the annular groove is adapted to the width of the belt. The inner side wall of the belt is provided with annular protrusions adapted to the annular grooves.

[0013] The bottom of the frame is provided with several support feet, with a minimum of four support feet, which are evenly distributed at the four corners of the bottom of the frame. Each support foot includes a fixed rod and an adjusting rod. The fixed rod is fixedly connected to the bottom of the frame, and the adjusting rod is threadedly connected to the fixed rod. The bottom of the adjusting rod is fixed with an anti-slip pad, which is made of nitrile rubber.

[0014] An observation window is provided on the side wall of the processing chamber. The observation window is rectangular in shape and has a sealing strip on its edge. The sealing strip is fixedly connected to the side wall of the processing chamber. A transparent acrylic plate is provided on the observation window. The transparent acrylic plate is fixedly connected to the side wall of the processing chamber by bolts. There are at least 4 bolts, which are evenly distributed around the transparent acrylic plate.

[0015] Equipment preparation stage: First, based on the flatness of the ground at the usage site, adjust the support feet to ensure the stability of the entire equipment. Specifically, rotate the adjusting rod in the support foot. Since the adjusting rod is threadedly connected to the fixed rod, rotating the adjusting rod changes the length of the adjusting rod extending beyond the fixed rod, thereby adjusting the height and level of the frame. Simultaneously, the nitrile rubber anti-slip pad at the bottom of the adjusting rod increases friction with the ground, preventing slippage during operation and ensuring stable operation.

[0016] Feeding Stage: The corn ears to be threshed are fed into the feed hopper at the top of the processing chamber. An inclined guide plate (at an angle of 30-45° to the inner wall of the feed hopper) inside the hopper guides the corn ears smoothly into the processing chamber, preventing blockages. Simultaneously, the 2-3mm high arc-shaped protrusions on the surface of the guide plate disperse the corn ears to some extent, further ensuring uniform and smooth feeding, laying the foundation for efficient threshing.

[0017] Threshing transmission stage: The geared motor on the frame is started, which drives the drive pulley fixed on its output shaft to rotate. The drive pulley transmits power to the driven pulley and the left and right tension rollers in the tension adjustment mechanism via a belt. Since the outer circumferential walls of the drive pulley, driven pulley, left tension roller, and right tension roller are all equipped with arc-shaped annular grooves that match the annular protrusions on the inner sidewall of the belt, the annular protrusions embed into the annular grooves during belt transmission, effectively preventing belt slippage and ensuring the stability and reliability of power transmission. The rotation of the driven pulley drives the threshing roller, which is fixedly connected to it, to rotate inside the processing chamber. Several sets of spirally distributed threshing teeth (each set has at least 3 threshing teeth, with a spacing of 5-8 mm between adjacent sets) are evenly arranged on the outer circumferential wall of the threshing roller. During the rotation of the threshing roller, the threshing teeth can fully contact the corn ears, performing efficient threshing. The spirally distributed threshing teeth also play a certain role in conveying the corn ears during threshing, ensuring the continuity of threshing.

[0018] Belt tension adjustment stage: During long-term use of the device, when the belt becomes loose and affects transmission efficiency, the first reduction motor in the tension adjustment mechanism is activated. The first reduction motor drives the rotating rod fixedly connected to its output shaft to rotate on the U-shaped support. Since the rotating rod has opposite external threads at both ends, and the left and right guide blocks are threaded onto these opposite external threads, when the rotating rod rotates, the left and right guide blocks move in opposite directions (one moves closer to the U-shaped support, and the other moves further away; the specific direction of movement depends on the rotation direction of the rotating rod). Simultaneously, the left and right guide blocks are slidably connected to the guide rail on the inner wall of the protective cover via guide grooves. The guide rail guides and limits the movement of the left and right guide blocks, ensuring stable movement and preventing deviation. The movement of the left and right guide blocks drives the left and right tensioning rollers, which are fixedly connected to them, to move respectively. By adjusting the positions of the left and right tensioning rollers, the belt tension is changed, thereby achieving belt tension adjustment. When the belt tension reaches the appropriate state, the first reduction motor is turned off, completing the tension adjustment. During the adjustment process, the limit blocks at both ends of the guide rail prevent the left and right guide blocks from moving beyond their limit positions, avoiding damage to the belt or other components.

[0019] Threshing and Discharge Stage: During the threshing process, operators can observe the threshing progress of corn seeds inside the processing chamber in real time through a rectangular observation window on the side wall of the chamber. The transparent acrylic panel on the observation window has good light transmittance, allowing operators to clearly see the internal situation. At the same time, the sealing strips around the edges of the observation window ensure the airtightness of the processing chamber, preventing dust and other impurities from escaping through the gaps in the observation window during the threshing process. After the corn ears have been threshed, the threshed corn seeds are discharged from the discharge hopper at the bottom of the processing chamber, entering subsequent screening and storage stages.

[0020] Beneficial effects

[0021] Stable transmission efficiency and convenient adjustment: The tension adjustment mechanism set in this utility model drives the rotating rod to rotate through the reduction motor, so that the left and right guide blocks drive the left tension roller and the right tension roller to move, realizing automatic tension adjustment of the belt. No manual disassembly of parts is required, making operation convenient and saving time. It effectively avoids the problems of reduced transmission efficiency and unstable threshing roller speed caused by belt slack, ensuring threshing effect, reducing seed breakage rate, and improving the normal operating efficiency of the equipment. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the tension adjustment mechanism of this utility model;

[0026] Figure 4 This is a partial cross-sectional view of the tension adjustment mechanism of this utility model;

[0027] In the picture:

[0028] 1-Frame, 2-Processing bin, 3-Feed hopper, 4-Discharge hopper, 5-Threshing roller, 6-Driven wheel, 7-Gear motor, 8-Drive wheel, 9-Tension adjustment mechanism, 91-U-shaped support, 92-Rotating rod, 93-Gear motor 1, 94-Left guide block, 95-Right guide block, 96-Protective cover, 97-Left tension roller, 98-Right tension roller, 10-Belt. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figure 1-4 As shown;

[0031] A corn seed threshing device.

[0032] This implementation plan addresses the technical problems existing in the prior art, such as those disclosed in the background section above: "Currently, there are many types of corn seed threshing devices on the market, but most have some shortcomings. Some threshing devices have unreasonable transmission mechanism designs, using fixed transmission wheel structures. During long-term use, the belts are prone to loosening, leading to decreased transmission efficiency, unstable rotation speed of the threshing rollers, and consequently affecting the threshing effect, resulting in incomplete threshing or increased seed breakage. Moreover, when the belt loosens and needs adjustment, it often requires manual disassembly of relevant components, which is cumbersome, time-consuming, and affects the normal operating efficiency of the equipment." In practical terms, this problem is clearly a real and difficult-to-solve issue. Therefore, to solve this technical problem, a corn seed threshing device is provided.

[0033] Example 1

[0034] like Figure 1-4 As shown in the figure;

[0035] This embodiment provides a corn seed threshing device, including a frame 1. A processing chamber 2 is fixedly installed on the frame 1 by bolts. A feed hopper 3 is welded and fixed to the upper end of the processing chamber 2, and a discharge hopper 4 is welded and fixed to its lower end. A threshing roller 5 is rotatably installed inside the processing chamber 2 through bearings. One end of the threshing roller 5 extends out of the processing chamber 2 and is fixedly connected to a driven roller 6 by a key. A geared motor 7 is fixedly installed on the frame 1 by bolts. The output shaft of the geared motor 7 is fixed to a driving roller 8 through a coupling. A tension adjustment mechanism 9 is also provided on the frame 1.

[0036] The tension adjustment mechanism 9 includes a U-shaped support 91 fixed to the frame 1 by bolts. A rotating rod 92 is installed through the U-shaped support 91 by bearings. A geared motor 93 is fixed to the side wall of the U-shaped support 91 by bolts. The output shaft of the geared motor 93 is fixedly connected to the rotating rod 92 by a coupling. The two ends of the rotating rod 92 are machined with external threads in opposite directions. A left guide block 94 and a right guide block 95 are threaded onto the external threads in opposite directions, respectively. A protective cover 96 is fixed to the U-shaped support 91 outside the rotating rod 92 by bolts. The left guide block 94 and the right guide block 95 are slidably connected to the protective cover 96. A left tensioning roller 97 and a right tensioning roller 98 are fixed to the left guide block 94 and the right guide block 95 by welding, respectively. The driving wheel 8, the driven wheel 6, the left tensioning roller 97 and the right tensioning roller 98 are connected by a belt 10.

[0037] Several sets of threshing teeth are uniformly arranged on the outer circumferential wall of the threshing roller 5 by welding. Each set of threshing teeth includes 3 threshing teeth distributed in a spiral shape, and the distance between two adjacent sets of threshing teeth is 6 mm (selected in the range of 5-8 mm).

[0038] The inside of the feed hopper 3 is inclinedly equipped with a guide plate by welding. The angle between the guide plate and the inner wall of the feed hopper 3 is 35° (selected within the range of 30-45°). The surface of the guide plate is equipped with several arc-shaped protrusions by welding. The height of the arc-shaped protrusions is 2.5mm (selected within the range of 2-3mm).

[0039] Two guide rails (the number can be set according to actual needs) are fixed on the inner wall of the protective cover 96 by bolts. The outer walls of the left guide block 94 and the right guide block 95 are respectively machined with guide grooves that are compatible with the guide rails. The guide rails are slidably connected to the guide grooves, and both ends of the guide rails are welded with limit blocks, which are welded and fixed to the inner wall of the protective cover 96.

[0040] The outer circumferential walls of the driving roller 8, driven roller 6, left tension roller 97 and right tension roller 98 are all provided with annular grooves. The cross-section of the annular groove is arc-shaped, and the width of the annular groove is adapted to the width of the belt 10. The inner side wall of the belt 10 is integrally formed with annular protrusions adapted to the annular grooves.

[0041] The bottom of the frame 1 is provided with 4 support feet (at least 4, 4 are selected here), which are evenly distributed at the four corners of the bottom of the frame 1. The support feet include a fixed rod and an adjusting rod. The fixed rod is welded to the bottom of the frame 1 and the adjusting rod is threaded to the fixed rod. The bottom of the adjusting rod is glued with an anti-slip pad, which is made of nitrile rubber.

[0042] An observation window is provided on the side wall of the processing chamber 2. The observation window is rectangular in shape. A sealing strip is glued to the edge of the observation window and is tightly attached to the side wall of the processing chamber 2. A transparent acrylic plate is provided on the observation window and is fixed to the side wall of the processing chamber 2 by four bolts. The bolts are evenly distributed around the transparent acrylic plate.

[0043] The working process of this embodiment is consistent with the working principle described in the above-mentioned utility model, and will not be repeated here. Through the specific structural design of this embodiment, efficient and low-damage threshing of corn seeds can be effectively achieved, ensuring stable transmission and smooth feeding. It also features convenient observation and stable support adjustment functions, meeting the needs of large-scale corn seed processing.

[0044] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A corn seed threshing device, comprising a frame (1), characterized in that: The frame (1) is provided with a processing chamber (2), the upper end of the processing chamber (2) is provided with a feed hopper (3), and the lower end is provided with a discharge hopper (4). The processing chamber (2) is provided with a threshing roller (5), one end of the threshing roller (5) extends out of the processing chamber (2) and is provided with a driven roller (6). The frame (1) is also provided with a geared motor (7), the output shaft of the geared motor (7) is fixed with a driving roller (8), and the frame (1) is provided with a tension adjustment mechanism (9). The tension adjustment mechanism (9) includes a U-shaped support (91) fixed on the frame (1), a rotating rod (92) is provided through the U-shaped support (91), and a gear reducer is fixed to the side wall of the U-shaped support (91). Motor 1 (93), the output shaft of the geared motor 1 (93) is fixedly connected to the rotating rod (92), the two ends of the rotating rod (92) are provided with external threads in opposite directions, and the left guide block (94) and the right guide block (95) are threaded on the external threads in opposite directions. A protective cover (96) is provided on the U-shaped support (91) outside the rotating rod (92). The left guide block (94) and the right guide block (95) are slidably connected to the protective cover (96). The left tension roller (97) and the right tension roller (98) are fixed on the left guide block (94) and the right guide block (95) respectively. The driving wheel (8), the driven wheel (6), the left tension roller (97) and the right tension roller (98) are connected by a belt (10).

2. The corn seed threshing device according to claim 1, characterized in that: The outer circumferential wall of the threshing roller (5) is uniformly provided with several sets of threshing teeth. Each set of threshing teeth includes at least 3 threshing teeth distributed in a spiral shape, and the distance between two adjacent sets of threshing teeth is 5-8 mm.

3. The corn seed threshing device according to claim 2, characterized in that: The feed hopper (3) is inclined inside and has a guide plate. The angle between the guide plate and the inner wall of the feed hopper (3) is 30-45°, and the surface of the guide plate is provided with several arc-shaped protrusions with a height of 2-3mm.

4. The corn seed threshing device according to claim 1, characterized in that: The inner wall of the protective cover (96) is fixed with several guide rails. The outer walls of the left guide block (94) and the right guide block (95) are respectively provided with guide grooves that are compatible with the guide rails. The guide rails are slidably connected to the guide grooves, and both ends of the guide rails are provided with limit blocks. The limit blocks are fixedly connected to the inner wall of the protective cover (96).

5. A corn seed threshing device according to claim 1, characterized in that: The outer circumferential walls of the driving roller (8), driven roller (6), left tension roller (97) and right tension roller (98) are all provided with annular grooves. The cross-section of the annular groove is arc-shaped, and the width of the annular groove is adapted to the width of the belt (10). The inner side wall of the belt (10) is provided with annular protrusions adapted to the annular grooves.

6. A corn seed threshing device according to claim 1, characterized in that: The bottom of the frame (1) is provided with several support feet, the number of support feet is at least 4, and they are evenly distributed at the four corners of the bottom of the frame (1). The support feet include a fixed rod and an adjusting rod. The fixed rod is fixedly connected to the bottom of the frame (1), and the adjusting rod is threadedly connected to the fixed rod. The bottom of the adjusting rod is fixed with an anti-slip pad, and the anti-slip pad is made of nitrile rubber.

7. A corn seed threshing device according to claim 1, characterized in that: An observation window is provided on the side wall of the processing chamber (2). The observation window is rectangular in shape and has a sealing strip on the edge. The sealing strip is fixedly connected to the side wall of the processing chamber (2). A transparent acrylic plate is provided on the observation window. The transparent acrylic plate is fixedly connected to the side wall of the processing chamber (2) by bolts. The number of bolts is at least 4 and they are evenly distributed around the transparent acrylic plate.

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