Agricultural thresher
By introducing an adjustable screen aperture and a double impeller design into the thresher, the problem of impurities mixing in due to the fixed screen aperture in the existing technology has been solved, achieving efficient and fine screening and cleaning of crop grains, and improving the adaptability and production efficiency of the thresher.
Patent Information
- Application Number
- CN202423312740.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The screen aperture of existing threshers is fixed and cannot be adjusted according to the size of crop grains. As a result, smaller crops contain more impurities after threshing, which reduces product quality and production efficiency.
By setting a fixed screen aperture, which can be adjusted, and combining a drum with axial flow and centrifugal impeller designs, fine screening and cleaning of different crops can be achieved.
It improves the cleanliness and purity of the grains after threshing, reduces the difficulty of operation and the intensity of manual labor, and enhances agricultural production efficiency and product quality.
Smart Images
Figure CN223714632U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a threshing machine technical field especially relates to an agricultural threshing machine. BACKGROUND
[0002] The agricultural threshing machine is a kind of agricultural machinery for separating grain from stem, it usually has the functions of threshing, separating and cleaning.The main working parts of the threshing machine are the threshing device composed of cylinder and concave screen.There are many kinds of threshing machines, according to basic structure, it can be divided into simple type, semi-complex and complex threshing machine.Simple threshing machine can only get grain mixed with straw and rice hull, which needs secondary processing and treatment.Semi-complex threshing machine contains threshing, separating and screening device, but there is the problem of incomplete threshing.Complex threshing machine has the functions of threshing, separating, screening, re-threshing, re-cleaning and grading device, which can achieve better screening function.
[0003] The threshing machine in the prior art can usually thresh various crops, however, the screen mesh in the prior art usually adopts fixed aperture size screen mesh, which has an obvious shortcoming when threshing small-grained crops, such as rapeseed: the threshed crops contain more impurities.This is because the fixed aperture screen mesh cannot be adjusted according to the size of the grain, so that small-grained rapeseed and impurities are difficult to separate effectively, so that the threshed product contains more impurities.Under this condition, the threshing effect is poor, it is more labor-intensive, and the rapeseed after threshing contains more impurities, the quality of rapeseed is not high, which is not conducive to oil extraction.Therefore, for small-grained crops, more precise screening technology or adjustable aperture screen mesh is needed to improve the purity and quality after threshing.
[0004] Based on the above problems, the threshing machine in the prior art needs to be further improved. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing an agricultural threshing machine to solve the above problems.
[0006] The utility model realizes the following technical scheme:
[0007] An agricultural threshing machine, including inlet, threshing bin, cylinder, screen mesh, discharge port and driving device, inlet communicates with threshing bin, cylinder is rotatably arranged in the threshing bin, the bottom of cylinder is provided with screen mesh, and driving device is used to drive cylinder to rotate;
[0008] The cylinder includes beating cylinder part, first impeller and second impeller, the beating cylinder part, the first impeller and the second impeller are connected in sequence, a circular isolation plate is arranged between the first impeller and the second impeller, and the isolation plate is used to isolate and crush straw;
[0009] The screen comprises a fixed screen and a sliding screen, the sliding screen is slidingly arranged on the upper part of the fixed screen, the screen holes of the screen are formed by the screen holes of the fixed screen and the sliding screen in communication, the screen holes of the fixed screen and the sliding screen can be one-to-one corresponding and coincided, and the sliding screen can change the coincidence degree with the screen holes of the fixed screen during sliding, thereby changing the size of the screen holes of the screen.
[0010] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0011] 1. In the prior art, the threshing machine screen usually uses a fixed aperture size screen, as the screen hole size is not adjustable, it cannot be optimized according to the size and shape of different crop seeds, leading to difficulty in effectively separating the seeds and impurities during the threshing process. Especially when dealing with smaller particles of crops, the fixed aperture screen cannot accurately screen, which easily causes the mixing of seeds and impurities, thereby reducing the quality of the threshed products, increasing the workload of subsequent cleaning, and affecting the efficiency and economic benefits of agricultural production. The screen plays a crucial role in the threshing machine, and its biggest advantage is that it can realize fine screening of crop seeds. The utility model combines fixed screens and sliding screens, and the screen can adjust the aperture size according to different crops and threshing requirements. This flexibility greatly improves the cleanliness and purity of the threshed seeds. The screen holes of the fixed screen and the sliding screen can be one-to-one corresponding and coincided, the coincidence degree of the screen holes is changed by moving the sliding screen, and then the screen hole size is adjusted to adapt to the passage of different size seeds, effectively separating crop particles and impurities. In addition, the design of the screen also includes a sliding groove and a micro electric telescopic rod in the same direction as the shaft direction, so that the adjustment process of the screen can be operated electrically, reducing the labor intensity of manual adjustment and improving the work efficiency. This design not only improves the adaptability and flexibility of the threshing machine, but also reduces the operation difficulty, making the threshing process more efficient and accurate.
[0012] 2、In the prior art, the cylinder of the threshing machine usually does not have a winnowing function, and its main disadvantage is that it cannot effectively separate the threshed grains and impurities. Since the winnowing function can blow out the light impurities such as chaff and broken stalks by wind force, and retain the heavier grains, the lack of this function will result in a higher content of impurities in the threshed mixture, increasing the workload and difficulty of subsequent cleaning. Therefore, the cylinder of the threshing machine without the winnowing function has obvious limitations in improving the threshing efficiency and ensuring the threshing quality. As the core component of the threshing machine, the design and function of the cylinder have a direct impact on the threshing effect. The advantages of the cylinder of the present application are first reflected in its high threshing capacity. Through the cooperation of the beating drum part and the impeller, the grains of crops can be quickly separated from the stalks. In particular, the double design of the axial flow impeller (first impeller) and the centrifugal impeller (second impeller) enables the cylinder not only to perform preliminary threshing, but also to further clean the grains through air flow, improving the cleanliness and efficiency of threshing. In addition, the structure of the cylinder is compact, occupies small space, does not need independent winnowing device, is convenient to install and move, which is a significant advantage for farmers and agricultural producers, especially in the case of limited space. The material and manufacturing process of the cylinder also ensure its durability and stability, reducing maintenance cost and failure rate. This efficient threshing and cleaning capacity, combined with the compactness and durability of the structure, makes the cylinder an indispensable part of the threshing machine, greatly improving the efficiency and quality of agricultural production. BRIEF DESCRIPTION OF DRAWINGS
[0013] The drawings described herein are used to provide further understanding of the embodiments of the present application, constitute a part of the present application, and do not constitute a limitation on the embodiments of the present application. In the drawings:
[0014] Figure 1 is a structural schematic diagram of the embodiment;
[0015] Figure 2 is a structural schematic diagram of the embodiment relative to Figure 1 is a structural schematic diagram of the embodiment relative to
[0016] Figure 3 is a structural schematic diagram of the cylinder of the embodiment;
[0017] Figure 4 is a structural schematic diagram of the screen of the embodiment;
[0018] Figure 5 is Figure 4 is a detailed schematic diagram of A in the embodiment.
[0019] The reference numerals in the attached drawings represent: 1-feed inlet, 2-threshing chamber, 3-drive mounting platform, 4-transmission wheel, 5-first discharge port, 6-second discharge port, 7-third discharge port, 8-impact cylinder, 9-first impeller, 10-isolation plate, 11-second impeller, 12-rotating shaft, 13-sliding screen, 14-fixed screen, 15-miniature electric telescopic rod, 16-slide groove, 17-slide rod. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.
[0021] like Figures 1 to 5 As shown in the figure, this embodiment of an agricultural thresher includes an inlet 1, a threshing chamber 2, a drum, a screen, an outlet, and a drive device. The drum is rotatably mounted inside the threshing chamber 2, and a screen is installed at the bottom of the drum. The drive device drives the drum to rotate. The drive device is an independent power unit (not shown in the figure; the drive device is mounted on a drive mounting platform 3 and drives a transmission wheel 4 to rotate via a belt pulley, which in turn drives a rotating shaft 12 connected to the transmission wheel 4 to rotate, further driving the drum to rotate). The inlet 1 connects to the threshing chamber 2. The operator inputs the crop to be threshed into the threshing chamber 2 through the inlet 1. The crop contacts the striking section 8 of the drum (the striking section 8 is equipped with multiple striking sections). The grains enter the bottom of the threshing chamber 2 through the bottom screen, while the crushed straw is above the screen. Under the action of the axial airflow (and vibration) of the first impeller 9, the straw gathers towards the first discharge port 5 and is transported to the outside through the first discharge port 5. The crop grains below the screen move towards the second impeller 11 at the bottom (at this time, the grains contain a lot of straw debris, such as straw leaves and their broken parts). When the crop grains reach the bottom of the second impeller 11, the debris (broken leaves, etc.) in the grains are discharged to the outside through the second discharge port 6 under the action of the centrifugal airflow of the second impeller 11. The crop grains continue to move forward under the action of airflow and vibration due to their heavier mass and are discharged to the outside through the third discharge port 7.
[0022] Specifically, the roller includes a beating barrel part 8, a first impeller 9 and a second impeller 11, the beating barrel part 8, the first impeller 9 and the second impeller 11 are connected in sequence, a circular isolation plate 10 is arranged between the first impeller 9 and the second impeller 11, and the isolation plate 10 is used for isolating broken straws; the discharge port includes a first discharge port 5, a second discharge port 6 and a third discharge port 7. The inlet port 1 is correspondingly arranged at the shaft section of the beating barrel part 8, the first discharge port 5 is correspondingly arranged at the shaft section of the first impeller 9 of the roller, the second discharge port 6 is correspondingly arranged at the shaft section of the second impeller 11, and the third discharge port 7 is arranged at the end position of the side of the roller close to the second impeller 11. The first impeller 9 is an axial flow impeller, and the second impeller 11 is a centrifugal impeller. The roller is correspondingly provided with a rotating shaft 12, the rotating shaft 12 extends away from the second impeller 11 and is connected with a transmission wheel 4 arranged outside; the transmission wheel 4 is rotationally connected with a driving device arranged outside the threshing bin 2, and the driving device drives the roller to rotate through the transmission wheel 4.
[0023] When the operator threshes different crops, the screen mesh size of the embodiment can be controlled by the electric control unit, fine screening is achieved, and the crops have less impurities. The screen mesh of the embodiment includes a fixed screen 14 and a sliding screen 13, and the sliding screen 13 is slidingly arranged on the upper portion of the fixed screen 14. The screen holes of the screen mesh are formed by the screen holes of the fixed screen 14 and the sliding screen 13, the screen holes of the fixed screen 14 and the sliding screen 13 can be one-to-one corresponding and coinciding, and the sliding screen 13 can change the coincidence degree with the screen holes of the fixed screen 14 during sliding, so as to change the size of the screen holes of the screen mesh. The fixed screen 14 is provided with a sliding groove 16 in the same direction as the rotating shaft 12, the sliding screen 13 is correspondingly provided with a sliding rod 17, and the sliding rod 17 is slidingly arranged in the sliding groove 16. One end of the sliding groove 16 is also fixedly provided with a micro electric telescopic rod 15, the micro electric telescopic rod 15 is in the same direction as the sliding groove 16, the telescopic end of the micro electric telescopic rod 15 is fixed with the sliding rod 17, and the micro electric telescopic rod 15 can drive the sliding rod 17 and the sliding screen 13 to slide on the fixed screen 14.
[0024] The above specific embodiments are used to further illustrate the purpose, technical scheme and advantages of the utility model, and it should be understood that the above description is only a specific embodiment of the utility model, and is not used to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. An agricultural thresher comprising an inlet (1), a threshing chamber (2), a cylinder, a screen, an outlet and a drive means, characterised in that, The inlet (1) is communicated with the threshing bin (2), a roller is rotatably arranged in the threshing bin (2), a sieve screen is arranged at the bottom of the roller, and the driving device is used for driving the roller to rotate. The roller comprises a beating barrel portion (8), a first impeller (9) and a second impeller (11), the beating barrel portion (8), the first impeller (9) and the second impeller (11) are sequentially connected, a circular isolation plate (10) is arranged between the first impeller (9) and the second impeller (11), and the isolation plate (10) is used for isolating and crushing the straw. The sieve screen comprises a fixed sieve (14) and a sliding sieve (13), the sliding sieve (13) is slidingly arranged on the upper portion of the fixed sieve (14), the sieve holes of the sieve screen are formed by the sieve holes of the fixed sieve (14) and the sliding sieve (13), the sieve holes of the fixed sieve (14) and the sliding sieve (13) can be one-to-one corresponding and coincided, and the sliding sieve (13) can change the coincidence degree with the sieve holes of the fixed sieve (14) in the sliding process, so as to change the size of the sieve holes of the sieve screen.
2. An agricultural thresher as claimed in claim 1, wherein, The discharge outlet comprises a first discharge outlet (5), a second discharge outlet (6) and a third discharge outlet (7).
3. An agricultural thresher as claimed in claim 2, wherein, The inlet (1) is correspondingly arranged at the shaft section of the beating barrel portion (8), the first discharge outlet (5) is correspondingly arranged at the shaft section of the first impeller (9) of the roller, the second discharge outlet (6) is correspondingly arranged at the shaft section of the second impeller (11), and the third discharge outlet (7) is arranged at the end portion position of the roller on the side close to the second impeller (11).
4. An agricultural thresher as claimed in claim 3, wherein, The first impeller (9) is an axial flow impeller, and the second impeller (11) is a centrifugal impeller.
5. An agricultural thresher as claimed in claim 1, wherein, The roller is correspondingly provided with a rotating shaft (12), the rotating shaft (12) extends away from the second impeller (11) and is connected with a transmission wheel (4) arranged outside; the transmission wheel (4) is rotatably connected with the driving device arranged outside the threshing bin (2), and the driving device drives the roller to rotate through the transmission wheel (4).
6. An agricultural thresher as claimed in claim 1, wherein, The fixed sieve (14) is provided with a sliding groove (16) in the same direction as the rotating shaft (12), the sliding sieve (13) is correspondingly provided with a sliding rod (17), and the sliding rod (17) is slidingly arranged in the sliding groove (16); one end of the sliding groove (16) is further fixed with a micro electric telescopic rod (15), the micro electric telescopic rod (15) is in the same direction as the sliding groove (16), the telescopic end of the micro electric telescopic rod (15) is fixed with the sliding rod (17), and the micro electric telescopic rod (15) can drive the sliding rod (17) and the sliding sieve (13) to slide on the fixed sieve (14).