Threshing machine capable of automatically adjusting screen

Abstract

The utility model relates to the field of agricultural equipment, in particular to a thresher capable of automatically adjusting a screen. The device comprises a rack, a machine shell, a rolling shaft shell, a rotating shaft rod, a stirring rolling shaft, a first screen, a second screen, a sealing shell, an expansion mechanism, a discharging hopper and an impurity discharging hopper, the machine frame is arranged on the ground, the machine shell is accelerated on the machine frame, the rolling shaft shell is located on one side of the machine shell, the rotating shaft rod is arranged on the rolling shaft shell and the machine shell in a penetrating mode, the stirring rolling shaft is located in the machine shell, the first screen is located below the stirring rolling shaft, the number of the second screens is two, and the second screens are arranged on the machine shell. The two first screens are arranged on the inner wall of the machine shell, the two second screens are located below the first screens, the sealing shell is installed on the inner wall of the machine shell and located on one sides of the second screens, the expanding mechanism is located in the sealing shell, the discharging hopper is arranged below the second screens, and the impurity discharging hopper is installed in the extending direction of one sides of the second screens.

Description

Technical Field

[0001] This utility model relates to the field of agricultural equipment, and in particular to an automatic adjustable screen thresher. Background Technology

[0002] A threshing machine is a stationary machine used to separate mature grains from crop plants, performing threshing, separating, and cleaning functions. Its application can be traced back to ancient times; primitive threshing methods in ancient China involved crushing grains with stone rollers, beating them with flails, pounding them on slats, or trampling them by livestock. With technological advancements, the design and function of threshing machines have been continuously improved to meet the needs of modern agricultural production. China developed simple rice threshing machines in the early 1950s, finalized the production of large-scale compound threshing machines in 1957, and produced semi-compound threshing machines and semi-feeding threshing machines in the 1960s.

[0003] Threshing machines are broadly classified into two categories based on the degree to which stalks are fed into the threshing device: full-feed and semi-feed. According to the characteristics of the threshing device, full-feed threshing machines include three types: tangential-flow drum, axial-flow drum, and impeller type; semi-feed threshing machines include two types: clamp-type and handheld type. The applicable scope and requirements of a threshing machine are mainly determined by the structural type of the threshing device. Most threshing machines can only operate in a fixed location on the threshing floor, and are generally equipped with wheels for easy relocation. In some rice-growing areas where operation is necessary in damp fields, the threshing machine's base is generally designed in a boat-bottom shape for easy towing on damp ground.

[0004] However, existing threshers often encounter the following problems in use: In traditional threshers, the screen aperture and vibration frequency are usually fixed. This often fails to provide optimal screening results for crops with different particle sizes, such as wheat and corn. For example, wheat kernels are small, and a smaller screen aperture is designed to separate the grains. However, for larger corn kernels, a screen aperture that is too small will prevent the kernels from passing through smoothly, resulting in incomplete threshing and low efficiency. Utility Model Content

[0005] The main objective of this invention is to provide an automatic adjustable screen threshing machine to effectively solve the problem mentioned in the background art that the aperture and vibration frequency of the existing threshing machine screens are usually fixed, resulting in unstable threshing effect when dealing with grains of different sizes.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An automatic adjustable screen threshing machine includes:

[0008] The frame is located on the ground;

[0009] The housing accelerates on the frame;

[0010] A roller housing, the roller housing being located on one side of the housing;

[0011] A rotating shaft, which passes through the roller housing and the machine housing;

[0012] A stirring roller is located inside the housing and is mounted on the shaft of the rotating shaft.

[0013] A first screen is located below the stirring roller;

[0014] There are two second screens, located below the first screen.

[0015] A sealing shell is installed on the inner wall of the housing and is located on one side of the second screen.

[0016] An extension mechanism is located within the sealed housing;

[0017] A discharge hopper is disposed below the second screen.

[0018] A waste discharge hopper is installed in the extending direction on one side of the second screen.

[0019] The extended mechanism further includes:

[0020] A cylinder, which is movably mounted inside the sealed housing;

[0021] A deflector link, one end of which is movably connected to the output end of the cylinder;

[0022] A booster rod, one end of which is movably connected to the turning end of the turning link;

[0023] A connecting rod, one end of which is movably connected to the other end of the push rod;

[0024] A first rotating shaft, one end of which is horizontally mounted on the housing, and the other end of which is connected to the other end of the turning link;

[0025] The second rotating shaft is parallel to the first rotating shaft, and the second rotating shaft is connected to the other end of the connecting rod.

[0026] Good includes:

[0027] A feed hopper, which is connected to one side of the machine housing;

[0028] A drive motor is mounted at the bottom end of the frame;

[0029] A transmission disc, which is located inside the roller housing;

[0030] A drive belt, one end of which is fitted onto the drive disc, and the other end of which is connected to the output end of the drive motor.

[0031] The rotating shaft passes through the central axis of the transmission disc.

[0032] The tops of the two second screens are respectively connected to the first rotating shaft and the second rotating shaft.

[0033] The bottom surfaces of the two second screens are inclined ramps.

[0034] The aperture diameter of the two second screens is smaller than that of the first screen.

[0035] Compared with existing technologies, the beneficial effects of this invention are as follows: The automatically opening and closing second screen effectively solves the problem of poor screen adaptability in traditional threshers when processing different crops. When processing smaller grains, simply activate the extension mechanism, which will cause the second screen to close, allowing for finer two-stage screening of the small grains and ensuring threshing quality. Conversely, if screening larger grains is required, simply control the extension mechanism to open the second screen. The opened second screen will not affect the screening effect of the large-aperture first screen, and the threshed grains will be discharged directly. Attached Figure Description

[0036] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the specific embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof.

[0037] Figure 1 This is a schematic diagram of the overall shape of the present utility model.

[0038] Figure 2 This is a side view of the present invention.

[0039] Figure 3 To expand the mechanism structure diagram.

[0040] The following are the labels in the diagram: 1. Frame; 2. Housing; 3. Roller housing; 4. Rotating shaft; 5. Agitating roller; 6. First screen; 7. Second screen; 8. Sealing shell; 9. Expansion mechanism; 10. Discharge hopper; 11. Impurity discharge hopper; 91. Cylinder; 92. Turning rod; 93. Push rod; 94. Linkage rod; 95. First rotating shaft; 96. Second rotating shaft; 12. Feed hopper; 13. Drive motor; 14. Transmission disc; 15. Transmission belt. Detailed Implementation

[0041] 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.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] like Figure 1-3 As shown, an automatic adjustable screen thresher includes: a frame 1, a housing 2, a roller housing 3, a rotating shaft 4, a stirring roller 5, a first screen 6, a second screen 7, a sealing housing 8, an extension mechanism 9, a discharge hopper 10, and a waste removal hopper 11. The frame 1 is mounted on the ground, and the housing 2 is mounted on top of the frame 1. The frame 1 and housing 2 form the basic structure of the entire thresher. The frame 1, mounted on the ground, supports all other components, while the housing 2 surrounds the core threshing, screening, and waste removal system, ensuring stable operation of the machine. The design of the housing 2 typically requires it to withstand various internal forces and prevent external impurities and dust from entering the machine and affecting its performance. The roller housing 3 is located on one side of the housing 2. The rotating shaft 4 passes through the roller housing 3 and the housing 2. The rotating shaft 4 passes through the central shaft of the transmission disc 14. The stirring roller 5 is located inside the housing 2 and is installed on the shaft of the rotating shaft 4. The rotating shaft 4 passes through the roller housing 3 and the housing 2, serving to connect and transmit motion.

[0044] Preferably, the first screen 6 is located below the stirring roller 5, and two second screens 7 are provided, both located below the first screen 6. The tops of the two second screens 7 are connected to the first rotating shaft 95 and the second rotating shaft 96, respectively. The bottom surfaces of the two second screens 7 are inclined ramps, and the aperture diameter of the two second screens 7 is smaller than that of the first screen 6. The sealing shell 8 is installed on the inner wall of the machine casing 2, and the sealing shell 8 is located on one side of the second screen 7. The expansion mechanism 9 is located inside the sealing shell 8. The discharge hopper 10 is located below the second screen 7, and the impurity discharge hopper 11 is installed in the extension direction on one side of the second screen 7. The design of the screens is crucial because it directly affects the screening effect after threshing. The first screen 6 is used for preliminary screening, with a larger aperture diameter, which can separate the threshed grain from most impurities. The second screen 7 is used for further screening, with a smaller aperture diameter, to remove fine impurities such as wheat straw fragments and soil.

[0045] In this embodiment, to enable the second screen 7 to open and close automatically, an extension mechanism 9 is designed, including: a cylinder 91 movably installed inside the sealed housing 8; one end of a turning connecting rod 92 movably connected to the output end of the cylinder 91; one end of a push rod 93 movably connected to the turning end of the turning connecting rod 92; one end of a connecting rod 94 movably connected to the other end of the push rod 93; one end of a first rotating shaft 95 horizontally installed through the housing 2; one end of the first rotating shaft 95 connected to the other end of the turning connecting rod 92; a second rotating shaft 96 parallel to the first rotating shaft 95; and the other end of the second rotating shaft 96 connected to the other end of the connecting rod 94. The cylinder 91 drives the turning connecting rod 92, thereby achieving automatic adjustment of the screen and ensuring that the screen automatically expands or contracts according to threshing requirements. The extension mechanism 9 is a key component for realizing screen angle changes; it can automatically adjust according to different operational needs, improving the adaptability of the thresher.

[0046] Preferably, the feed hopper 12 is connected to one side of the casing 2, the drive motor 13 is installed at the bottom of the frame 1, the transmission disc 14 is located inside the roller housing 3, one end of the transmission belt 15 is sleeved on the transmission disc 14, and the transmission disc 14, through connection with the motor, completes the transmission and conversion of power, thereby driving the stirring roller 5 to perform the threshing operation. The other end of the transmission belt 15 is at the output end of the drive motor 13.

[0047] It should be noted that, in the case of the automatic adjustable screen threshing machine designed in this utility model, when threshing small grains such as wheat ears, the cylinder 91 is activated. The output end of the cylinder 91 retracts, pulling one end of the deflecting connecting rod 92. One end of the deflecting connecting rod 92 rotates at an angle, causing its own deflecting end to rotate as well. The deflecting end of the deflecting connecting rod 92 is gradually lifted. When the deflecting end of the deflecting connecting rod 92 is lifted, the other end of the deflecting connecting rod 92 drives the first rotating shaft 95 to rotate axially inward. The inward rotation of the first rotating shaft 95, in turn, drives one of the second screens 7 to rotate inward. The deflecting end of the deflecting connecting rod 92 gradually becomes vertical, driving the connected push rod 93. The push rod 93, after being driven, also becomes vertical. The verticality of the push rod 93 pulls the connecting rod 94 and the second rotating shaft 96 to rotate inward. The rotation of the second rotating shaft 96 drives one of the second screens 7 on the shaft to rotate inward. When the bottom ends of the two second screens 7 converge, the drive motor 13 is started. The output end of the drive motor 13 rotates, driving the transmission disc 14 through the transmission belt 15. The transmission disc 14 rotates, driving the shaft rod 4 at the center of the shaft, which in turn drives the stirring roller 5 to rotate. At this time, a stalk with wheat ears is put in. The stirring roller 5 will cause the wheat ears to thresh and be screened out by the first screen 6. However, the wheat ears screened by the first screen 6 with a larger diameter will contain impurities such as wheat straw or soil particles. The merged second screen 7 will further screen these impurities. Since its bottom is a sloping ramp, the screened impurities will slide towards the discharge hopper 11 and be discharged. The screened wheat grains will continue to fall due to gravity and be discharged by the discharge hopper 10.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic adjustable screen threshing machine, characterized in that, include: A frame (1) is provided on the ground; Housing (2), which accelerates the frame (1); Roller housing (3), the roller housing (3) being located on one side of the housing (2); A rotating shaft (4) passes through the roller housing (3) and the machine housing (2); A stirring roller (5) is located inside the housing (2) and is mounted on the shaft of the rotating shaft (4). The first screen (6) is located below the stirring roller (5); There are two second screens (7), and the two second screens (7) are located below the first screen (6); A sealing shell (8) is installed on the inner wall of the housing (2) and the sealing shell (8) is located on one side of the second screen (7); An extension mechanism (9) is located inside the sealing shell (8); A discharge hopper (10) is disposed below the second screen (7); A waste discharge hopper (11) is installed in the extending direction on one side of the second screen (7).

2. The automatic adjustable screen thresher according to claim 1, characterized in that, The extension mechanism (9) further includes: Cylinder (91), which is movably mounted inside the sealing shell (8); A deflector link (92), one end of which is movably connected to the output end of the cylinder (91); A booster rod (93), one end of which is movably connected to the turning end of the turning link (92); Linkage rod (94), one end of which is movably connected to the other end of the booster rod (93); The first rotating shaft (95) has one end horizontally mounted on the housing (2) and the other end of the first rotating shaft (95) is connected to the other end of the turning link (92). The second rotating shaft (96) is parallel to the first rotating shaft (95) and is connected to the other end of the connecting rod (94).

3. The automatic adjusting screen thresher according to claim 1, characterized in that, good include: Feed hopper (12), which is connected to one side of the housing (2); A drive motor (13) is mounted at the bottom end of the frame (1); A transmission disc (14) is located inside the roller housing (3); A transmission belt (15) is provided, one end of which is sleeved on the transmission disc (14), and the other end of which is connected to the output end of the drive motor (13).

4. The automatic adjustable screen thresher according to claim 2, characterized in that, The rotating shaft (4) passes through the central axis of the transmission disc (14).

5. The automatic adjustable screen thresher according to claim 1, characterized in that, The tops of the two second screens (7) are respectively connected to the first rotating shaft (95) and the second rotating shaft (96).

6. The automatic adjustable screen thresher according to claim 1, characterized in that, The bottom surfaces of the two second screens (7) are inclined ramps.

7. The automatic adjustable screen thresher according to claim 1, characterized in that, The aperture diameter of the two second screens (7) is smaller than that of the first screen (6).

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