Half-feeding type rice thresher
By using a left-right segmented threshing drum design, combined with the spiral arrangement of V-shaped and U-shaped arch teeth, the problem of incomplete threshing caused by a single arch tooth structure is solved, achieving a high-efficiency and low-damage threshing effect, reducing grain waste and straw disposal costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MAANSHAN LIANGMANCANG GRAIN PLANTING CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-21
AI Technical Summary
Existing semi-feed threshers use a single bow tooth structure, which results in incomplete threshing, leading to grain waste and increased straw processing costs.
It adopts a left-right segmented threshing drum design. The V-shaped arch teeth on the left are used for initial threshing, and the U-shaped arch teeth on the right are used for secondary threshing. Combined with the spiral arrangement and gentle design, it improves threshing efficiency and cleanliness.
It significantly improves threshing cleanliness, reduces grain waste, lowers straw processing costs, and ensures the integrity and quality of rice.
Smart Images
Figure CN224139623U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of agricultural machinery technology, specifically a semi-feeding rice thresher. Background Technology
[0002] Semi-feed threshers often use a single bow-tooth structure for threshing, which can easily lead to incomplete threshing. This is because the threshing process is a complex physical process that requires multiple kneading and tearing of the rice grains to achieve complete threshing. The single bow-tooth structure has a relatively limited function during threshing and cannot adapt to different rice varieties. For rice grains that are firmly connected, it is difficult to fully separate the connection between the rice grains and the straw, resulting in rice residue. This not only wastes grains but also increases the cost of straw disposal.
[0003] Therefore, in order to solve the problem of incomplete threshing caused by the use of a single bow tooth structure in most threshing machines, it is necessary to propose a semi-feeding rice threshing machine. Utility Model Content
[0004] The purpose of this invention is to provide a semi-feeding rice thresher. Through the design of the left and right segmented detachment rollers, the V-shaped bow teeth on the left side can quickly insert into the connection between the rice grain and the rice stalk with their sharp blades to achieve preliminary and efficient threshing. After preliminary threshing, the remaining grains are loosely connected to the rice ears, and the U-shaped bow teeth can fit into the rice ears to gently and accurately separate the remaining rice grains, avoiding excessive impact on the grains, improving threshing cleanliness, reducing grain waste, and reducing straw processing costs.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A semi-feeding rice thresher includes a machine body, a threshing drum, and a feeding plate;
[0007] The upper part of the machine body is equipped with a feeding plate, and the lower part is equipped with a guide plate;
[0008] The threshing drum is installed between the feed plate and the guide plate, and adopts a left-right segmented design. The left segment is the primary threshing drum, and its surface is covered with V-shaped arch teeth. The right segment is the secondary threshing drum, and its surface is covered with U-shaped arch teeth.
[0009] The rice is fixed through the holes in the feeding plate, which also moves left and right at the top of the feeding plate via a screw and a slide.
[0010] Preferably, the V-shaped and U-shaped bow teeth are arranged in a spiral pattern on the surface of the threshing drum.
[0011] Preferably, the feeding plate is threadedly connected to the lead screw and slidably connected to the feed plate via a groove, and a drive device for driving the lead screw to rotate is fixedly installed at one end of the feed plate.
[0012] Preferably, a lifting plate is mounted on the front end of the feeding plate via a rotating shaft, and a drive device for driving the rotating shaft to rotate is fixedly mounted on the feeding plate.
[0013] Preferably, a fixing plate is installed in the insertion hole in a height-adjustable manner, and the feeding plate is connected to a screw via a thread, the bottom of which is movably connected to the fixing plate via a bearing.
[0014] Preferably, the machine body is equipped with a drive device for driving the threshing drum to rotate.
[0015] Preferably, the V-shaped bow teeth are acute-angled V-shaped, with the two sides contracting inward to form sharp cutting edges.
[0016] Preferably, the U-shaped bow teeth are semi-enclosed U-shaped, and their convex arc surfaces are rounded and easy to fit with rice grains.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] This semi-feed rice thresher adopts a left-right segmented threshing drum design. The left V-shaped arch teeth quickly insert into the connection between the rice grain and the rice stalk with their sharp blades to achieve preliminary and efficient threshing. The right U-shaped arch teeth conform to the rice ears and gently and precisely separate the remaining rice grains that are loosely connected to the rice ears after the preliminary threshing. This effectively avoids excessive impact on the grains, significantly improves the threshing cleanliness, and reduces grain waste caused by incomplete threshing. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the semi-feeding rice thresher of this utility model. Figure 1 ;
[0020] Figure 2 This is a schematic diagram of the structure of the semi-feeding rice thresher of this utility model. Figure 2 ;
[0021] Figure 3 This is a schematic diagram of the structure of the semi-feeding rice thresher of this utility model. Figure 3 ;
[0022] Figure 4 This is a schematic diagram of the structure of the semi-feeding rice thresher of this utility model. Figure 4 ;
[0023] Figure 5 This is a schematic diagram of the structure of the semi-feeding rice thresher of this utility model. Figure 5 .
[0024] In the diagram: 1. Machine body; 11. Feed plate; 111. Screw; 112. Slide groove; 12. Guide plate; 2. Threshing drum; 21. Primary threshing drum; 211. V-shaped bow teeth; 22. Secondary threshing drum; 221. U-shaped bow teeth; 3. Feeding plate; 31. Lifting plate; 32. Insertion hole; 321. Fixing plate; 322. Bearing; 323. Screw. Detailed Implementation
[0025] Please see Figure 1 A semi-feeding rice thresher includes a body 1, a threshing drum 2 and a feeding plate 3. The upper part of the body 1 is equipped with a feeding plate 11 and the lower part is equipped with a guide plate 12. A drive device for driving the threshing drum 2 to rotate is installed on the body 1.
[0026] The feed plate 11 is used to guide the rice ears to be threshed into the upper end of the threshing drum 2, and the guide plate 12 is used to guide the threshed rice grains and rice straw and other materials out of the threshing machine, so as to ensure that the materials can smoothly complete the threshing process and be collected or processed.
[0027] The threshing drum 2 is the core component of rice threshing. When the rice panicle is placed in the threshing gap on the surface of the threshing drum 2, the rotation of the threshing drum 2 will generate rubbing and tearing forces on the rice panicle, causing the rice grains to separate from the rice panicle and achieve the purpose of threshing.
[0028] The main function of the feeding plate 3 is to feed the rice panicles evenly and continuously into the working area of the threshing drum 2 to ensure the efficiency and stability of the threshing process.
[0029] Please see Figures 1-2 The threshing drum 2 is installed between the feed plate 11 and the guide plate 12, and adopts a left-right segmented design. The left segment is the primary threshing drum 21, whose surface is covered with V-shaped arch teeth 211, and the right segment is the secondary threshing drum 22, whose surface is covered with U-shaped arch teeth 221.
[0030] The segmented design of the threshing drum 2 allows it to use threshing teeth of different shapes and functions to thresh rice at different stages and according to the characteristics of the rice panicle. The primary threshing drum 21 on the left side uses the sharp edges of the V-shaped arch teeth 211 to quickly cut into the connection between the rice panicle and the stalk, achieving efficient initial threshing and removing most of the rice grains. The secondary threshing drum 22 on the right side utilizes the semi-enclosed structure and rounded convex surface of the U-shaped arch teeth 221 to conform to the shape of the rice panicle, gently and precisely stripping away the small amount of rice grains remaining after the primary threshing. This avoids breakage or damage to the grains due to excessive impact, thereby improving threshing cleanliness and reducing grain waste.
[0031] Please see Figure 2 Both the V-shaped bow teeth 211 and the U-shaped bow teeth 221 are arranged in a spiral pattern on the surface of the threshing drum 2.
[0032] The spiral arrangement of the threshing teeth ensures that they sequentially contact the rice panicles as the threshing drum 2 rotates, creating a continuous and uniform rubbing and threshing effect. This arrangement increases the contact area and time between the threshing teeth and the rice, ensuring that each grain has a chance to be effectively threshed. Simultaneously, the spiral arrangement guides the rice panicles forward along the rotation direction of the threshing drum 2, allowing the grains to separate gradually during threshing and preventing grain breakage or incomplete threshing due to excessive localized pressure.
[0033] Please see Figure 2 The V-shaped bow teeth 211 are acute-angled V-shaped, with the two sides contracting inward to form a sharp cutting edge.
[0034] Among them, the V-shaped bow tooth 211 is an acute V-shaped tooth with an included angle of 30°-60°. This angle range can ensure that the V-shaped bow tooth 211 has sufficient strength and can effectively cut into the connection between the rice grain and the rice stalk during threshing, so as to achieve efficient threshing.
[0035] The V-shaped structure of the V-shaped bow teeth 211 acts like a sharp pair of pliers, precisely clamping the connection between the rice grains and the rice stalks. Through the rotation and kneading action of the threshing drum 2, the rice grains are separated from the rice stalks. The sharp blades formed by the inward contraction of the two sides are one of the key features of the V-shaped bow teeth 211 to achieve efficient threshing. The sharp blades can more easily cut the connection between the rice grains and the rice stalks during the threshing process, reducing the force required for threshing and thus reducing the energy consumption of the threshing drum 2. At the same time, the sharp blades can reduce the squeezing and friction on the rice grains, avoiding the breakage of the grains due to excessive force, improving the integrity and quality of the grains, and creating favorable conditions for subsequent grain processing and storage.
[0036] As the threshing drum 2 rotates at high speed, the V-shaped bow teeth 211 continuously cut into and push out the rice ears. Due to the special shape and sharp edge of the V-shaped bow teeth 211, they can quickly grasp and peel off the rice grains during the cutting process, while not excessively entangled in the rice stalks during the pushing process, making the threshing process smoother and more efficient.
[0037] Please see Figure 2 The U-shaped bow teeth 221 are semi-enclosed U-shaped, and their convex arc surface is rounded and easy to fit with rice grains.
[0038] Among them, the U-shaped bow tooth 221 has a U-shaped radius of 8-12 mm, an opening width of 10-15 mm, and a tooth height of 15-20 mm, to ensure that the U-shaped bow tooth 221 can effectively fit the shape of the rice ear, while avoiding unnecessary damage to the rice.
[0039] The U-shaped arch teeth 221 feature a semi-enclosed U-shape design, allowing them to better conform to the shape of the rice ear. During threshing, as the rice ear passes through the U-shaped arch teeth 221, the semi-enclosed structure effectively prevents the rice ear from jumping or shifting during threshing, ensuring the accuracy and stability of the threshing action. This design not only improves threshing efficiency but also reduces the breakage rate of rice during the threshing process, ensuring the integrity and quality of the rice.
[0040] The rounded, convex surface design makes the contact between the U-shaped arch teeth 221 and the rice grains gentler, avoiding excessive impact and damage caused by sharp edges. During threshing, the rounded, convex surface better conforms to the natural curvature of the rice ears, separating the rice grains from the stalks through gentle rubbing and tearing. This design not only improves the cleanliness of threshing but also reduces damage to the rice husk, which is beneficial for subsequent grain processing and storage.
[0041] During the threshing process, the U-shaped arch teeth 221 are primarily responsible for the secondary threshing of the rice ears after the initial threshing. At this point, the remaining rice grains on the ears have become relatively loosely attached to the stalks. The U-shaped arch teeth 221, through their semi-enclosed structure and rounded convex surfaces, can more precisely target these remaining rice grains, peeling them off the stalks. This design makes the threshing process more thorough, reduces rice residue on the stalks, improves threshing cleanliness, reduces grain waste, and also lightens the burden of subsequent straw processing.
[0042] Please see Figure 1 and Figures 3-4 The rice is fixed through the insertion hole 32 in the feeding plate 3. The feeding plate 3 also moves left and right at the upper end of the feeding plate 11 through the lead screw 111 and the slide groove 112. The feeding plate 3 is threadedly connected to the lead screw 111 and slidably connected to the feeding plate 11 through the slide groove 112. A drive device for driving the lead screw 111 to rotate is fixedly installed at one end of the feeding plate 11.
[0043] The driving device is a stepper motor, which is installed at one end of the feed plate 11 and connected to one end of the lead screw 111 through a coupling. The coupling is an elastic coupling, which can compensate for the small coaxiality error between the lead screw 111 and the motor shaft.
[0044] When secondary threshing is required, the drive device is activated, which drives the lead screw 111 to rotate. Under the limit of the slide 112, the feeding plate 3 can move stably left and right, carrying the rice ears from the primary threshing cylinder 21 to the upper end of the secondary threshing cylinder 22.
[0045] Please see Figures 3-4 The front end of the feeding plate 3 is equipped with a lifting plate 31 via a rotating shaft, and a drive device for driving the rotating shaft to rotate is fixedly installed on the feeding plate 3.
[0046] The drive unit is a small DC motor or servo motor, and is equipped with a reducer to convert the high speed of the motor into a low speed suitable for the lifting plate 31 and increase the torque.
[0047] The main function of the lifting plate 31 is to lift and arrange the rice ears before the feeding plate 3 feeds them into the threshing drum 2, so that they can enter the threshing area in a more orderly manner.
[0048] When the feeding plate 3 moves forward, the drive device drives the rotating shaft to rotate, which in turn lifts the lifting plate 31 upward, lifting the rice ears from the threshing drum 2 and making them form a certain angle with the threshing drum 2. This can prevent the rice ears from piling up or being unevenly distributed when they enter the secondary threshing drum 22, thereby improving threshing efficiency and quality.
[0049] Please see Figure 5 A fixing plate 321 is installed in the insertion hole 32 in a height-adjustable manner. The feeding plate 3 is connected to a screw 323 by a thread. The bottom of the screw 323 is movably connected to the fixing plate 321 via a bearing 322.
[0050] The feeding plate 3 can firmly hold the rice ears through the insertion hole 32 and the fixing plate 321, preventing them from moving or shaking during threshing, thus ensuring threshing efficiency and quality.
[0051] When it is necessary to clamp the rice, rotate the screw 323 to drive the fixing plate 321 to rise and fall until the rice is tightly pressed into the insertion hole 32. The function of the bearing 322 is to keep the fixing plate 321 from rotating when the screw 323 rotates, so that only the rising and falling is achieved.
[0052] Working principle: This semi-feed rice thresher inserts the rice panicle to be threshed into the insertion hole 32, rotates the screw 323 to drive the fixed plate 321 to rise and fall, pressing the rice stalk tightly into the insertion hole 32, and then lays the rice panicle on the surface of the primary threshing cylinder 21. The primary threshing cylinder 21 is driven to rotate, so that the V-shaped bow teeth 211 quickly cut into the connection between the rice panicle and the rice stalk with their sharp edges, like a pair of sharp pliers, accurately clamping the connection between the rice grain and the rice stalk. Under the rotation and kneading action of the threshing cylinder 2, the rice grain is separated from the rice stalk, realizing the primary threshing and removing most of the rice grain;
[0053] Then, the lifting plate 31 is driven upward to lift the rice ears, and the screw 111 is started to rotate, driving the feeding plate 3 to move to the right and moving the rice ears to the upper end of the secondary threshing cylinder 22, entering the working area of the secondary threshing cylinder 22. The surface of the secondary threshing cylinder 22 is covered with U-shaped arch teeth 221. The U-shaped arch teeth 221 use their semi-enclosed structure and rounded convex arc surface to gently and precisely peel off the small amount of rice grains remaining after the initial threshing. Since the connection between the rice grains remaining on the rice ears and the rice stalks has become relatively loose at this time, the U-shaped arch teeth can act more precisely on these remaining rice grains, peeling them off the rice stalks, further improving the cleanliness of threshing, reducing the rice grains remaining on the rice stalks, and reducing food waste.
Claims
1. A semi-feeding rice thresher, characterized in that: It includes the machine body (1), the threshing drum (2) and the feeding plate (3); The upper part of the machine body (1) is equipped with a feed plate (11), and the lower part is equipped with a guide plate (12). The threshing drum (2) is installed between the feed plate (11) and the guide plate (12) and adopts a left-right segmented design. The left segment is the primary threshing drum (21), whose surface is covered with V-shaped arch teeth (211), and the right segment is the secondary threshing drum (22), whose surface is covered with U-shaped arch teeth (221). The rice is fixed by the insertion hole (32) in the feeding plate (3). The feeding plate (3) also moves left and right at the upper end of the feeding plate (11) by means of the lead screw (111) and the slide (112).
2. The semi-feed type paddy thresher according to claim 1, characterized in that: The V-shaped bow teeth (211) and U-shaped bow teeth (221) are arranged in a spiral pattern on the surface of the threshing drum (2).
3. The semi-feed type paddy thresher according to claim 1, characterized in that: The feeding plate (3) is threadedly connected to the lead screw (111) and slidably connected to the feed plate (11) via the slide groove (112). One end of the feed plate (11) is fixedly equipped with a drive device that drives the lead screw (111) to rotate.
4. The semi-feed type paddy thresher according to claim 1, characterized in that: The front end of the feeding plate (3) is equipped with a lifting plate (31) via a rotating shaft, and a drive device for driving the rotating shaft to rotate is fixedly installed on the feeding plate (3).
5. The semi-feed type paddy thresher according to claim 1, characterized in that: A fixing plate (321) is installed in the insertion hole (32) in a height-adjustable manner. The feeding plate (3) is connected to a screw (323) by a thread. The bottom of the screw (323) is movably connected to the fixing plate (321) via a bearing (322).
6. The semi-feed type paddy thresher according to claim 1, characterized in that: The machine body (1) is equipped with a drive device that drives the threshing drum (2) to rotate.
7. The semi-feed type paddy thresher according to claim 1, characterized in that: The V-shaped bow teeth (211) are acute-angled V-shaped, with the two sides contracting inward to form sharp cutting edges.
8. The semi-feed type paddy thresher according to claim 1, characterized in that: The U-shaped bow teeth (221) are semi-enclosed U-shaped, and their convex arc surfaces are rounded and easy to fit with rice grains.