Rice thresher with vibrating screen

Abstract

The utility model relates to agricultural machinery and equipment technical field, concretely relates to a rice thresher with vibrating screen, including threshing box and the threshing roller of rotation installation in the inside of threshing box, a plurality of threshing teeth are equipped on the circumference outer wall of threshing roller, two filter screen frames are equipped in the inside of threshing box below threshing roller, one screen is inserted and connected and installed on each filter screen frame, one vibration motor is fixedly installed on each filter screen frame bottom. The utility model discloses two filter screen frames with vibration motor and spring connecting structure are set up, realize double -deck vibrating screen selection, promote rice grain and sundry separation efficiency, the cleaning mechanism can automatically clean screen and avoid blockage, and the maintenance opening and front side cover plate design are convenient for equipment overhaul and screen replacement, and the overall structure improves the threshing cleaning effect of thresher and maintenance convenience.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery and equipment technology, specifically to a rice thresher with a vibrating screen. Background Technology

[0002] In the rice harvesting process, threshing is the crucial step in separating the rice grains from the ears. Traditional rice threshing methods mainly include manual threshing and animal-powered rolling. While these methods are simple to operate, they suffer from low efficiency and high labor intensity, making them unsuitable for the needs of modern large-scale agricultural production. With the development of agricultural mechanization, mechanical threshing equipment has gradually become more widespread; however, existing rice threshers still have many shortcomings.

[0003] On the one hand, the cleaning systems of most threshers are ineffective. Some equipment is only equipped with a single-layer screen, which makes it difficult to effectively separate rice from impurities such as straw and husks, resulting in a high impurity content in the threshed rice, requiring secondary manual screening. Even equipment with a double-layer screen structure lacks vibration, resulting in low screening efficiency and affecting threshing quality and operational efficiency.

[0004] On the other hand, screen clogging is a prominent problem. During the threshing process, debris such as straw and rice husks easily adhere to the screen, clogging the screen holes, reducing the screen's throughput, and consequently affecting the continuous operation of the thresher. Most existing equipment relies on manual cleaning of the screen periodically, which not only increases the labor intensity of operators but also reduces overall operational efficiency due to frequent shutdowns for cleaning. Furthermore, untimely manual cleaning can lead to thresher malfunctions and shorten the equipment's lifespan.

[0005] In view of this, we propose a rice thresher with a vibrating screen. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a rice thresher with a vibrating screen.

[0007] The technical solution of this utility model is:

[0008] A rice threshing machine with a vibrating screen includes a threshing box and a threshing roller rotatably installed inside the threshing box. The outer circumference of the threshing roller has several threshing teeth. Inside the threshing box, below the threshing roller, are two filter frames. Each filter frame has a screen inserted into it. A vibrating motor is fixedly installed at the bottom of each filter frame. Springs are fixedly installed near the four corners between the two filter frames. Two fixing blocks are symmetrically arranged above the upper filter frame, and these fixing blocks are fixed to the inner wall of the threshing box. Two springs are symmetrically fixed between the filter frame and each fixing block. The lower filter frame is inclined and points towards the rice grain outlet. A cleaning mechanism is located above the upper filter frame. The cleaning mechanism includes a movable block that moves left and right. A cleaning brush that fits tightly against the screen is installed at the bottom of the movable block. A maintenance opening is provided on the front side of the threshing box, and a front cover plate is fixedly installed on the outside of the maintenance opening by fixing bolts. By setting up two filter frames with vibration motors and a spring connection structure, double-layer vibration screening is achieved, which improves the separation efficiency of rice grains and impurities. The cleaning mechanism can automatically clean the screen to avoid clogging. The maintenance opening and front cover design facilitate equipment maintenance and screen replacement. The overall structure improves the threshing and cleaning effect and maintenance convenience of the threshing machine.

[0009] As a preferred technical solution, the threshing box has a rice ear inlet near the top, and a feed guide plate is fixedly installed on its outer side. A threshing motor with its output shaft coaxially fixed to the threshing roller is installed on the outer wall of the threshing box. A discharge guide plate is fixed on the outer wall of the threshing box below the rice grain outlet. The feed guide plate guides the rice ears smoothly into the threshing box, ensuring smooth feeding; the threshing motor provides power to the threshing roller, ensuring effective threshing by the threshing teeth; the discharge guide plate guides the screened rice grains to be accurately discharged, improving the continuity of feeding, threshing, and discharging of the equipment and increasing operating efficiency.

[0010] As a preferred technical solution, the outer wall of the threshing box is provided with a cleaning port, which is flush with the cleaning mechanism. A collection trough is fixedly installed on the outer wall of the threshing box below the cleaning port. The cleaning port cooperates with the cleaning mechanism to facilitate the cleaning brush to discharge the debris on the screen through the cleaning port; the collection trough can collect the discharged debris to prevent it from scattering and polluting the environment.

[0011] As a preferred technical solution, the cleaning mechanism further includes an L-shaped plate fixed to the outer wall of the threshing box. A lead screw threadedly connected to the movable block is rotatably mounted on the L-shaped plate, and two guide rods, both passing through the movable block, are symmetrically fixed on both sides of the lead screw. A cleaning motor with its output shaft coaxially fixed to the lead screw is mounted on the L-shaped plate. The cleaning motor drives the lead screw to rotate, and under the action of the guide rods, the movable block drives the cleaning brush to move stably left and right, realizing automatic and uniform cleaning of the screen, replacing manual cleaning, reducing labor intensity, while ensuring cleaning effect and maintaining the filtration performance of the screen.

[0012] As a preferred technical solution, a dust suction port is provided on the outer wall of the threshing box on the side opposite to the rice ear inlet, and a gas collecting hood is fixedly installed on the outer wall of the dust suction port. An external connecting pipe is installed on the gas collecting hood via an extension pipe, and a collection bag is installed on the external connecting pipe. The external connecting pipe and the extension pipe are connected by a flange. The dust suction port and the gas collecting hood can remove dust and small impurities generated during the threshing process, while the external connecting pipe and the collection bag can collect these impurities, reducing dust pollution. The flange connection facilitates the disassembly and assembly of the external connecting pipe and the extension pipe, makes cleaning of the collection bag convenient, improves the working environment, and protects the health of operators.

[0013] As a preferred technical solution, two mounting plates are installed inside the extension tube, and a rotating shaft is rotatably mounted between the two mounting plates. Several turbine fans are mounted on the outer wall of the rotating shaft, and an exhaust motor with its output shaft coaxially fixed to the rotating shaft is mounted on one of the mounting plates. The exhaust motor drives the turbine fans to rotate and generate suction, enhancing the suction effect of the dust inlet and more efficiently removing dust and impurities generated during threshing.

[0014] As a preferred technical solution, the threshing box has a discharge port at the bottom, and an installation frame is provided below the discharge port. A collection tray is provided inside the installation frame, and a support leg is fixedly installed at each of the four corners of the bottom of the threshing box. The discharge port facilitates the discharge of impurities that cannot be filtered by the lower screen, the collection tray can collect these impurities for convenient centralized processing, and the support legs ensure stable placement of the equipment.

[0015] As a preferred technical solution, each of the two opposing inner walls of the filter frame has an integrally formed inner protrusion, and the screen has a strip-shaped notch that engages with the inner protrusion. The inner protrusion and the strip-shaped notch provide support for the screen.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model achieves double-layer vibration screening by setting two filter frames with vibration motors and a spring connection structure, thereby improving the separation efficiency of rice grains and impurities. The cleaning mechanism can automatically clean the screen to avoid clogging. The maintenance opening and front cover plate design facilitate equipment maintenance and screen replacement. The overall structure improves the threshing and cleaning effect and maintenance convenience of the threshing machine. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the threshing box in this utility model;

[0020] Figure 3 In this utility model Figure 2 Enlarged view of point A in the image;

[0021] Figure 4 This is a schematic diagram of the structure of the filter frame and screen in this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the extension tube in this utility model;

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Threshing box; 10. Rice ear inlet; 11. Feed guide plate; 12. Cleaning port; 13. L-shaped plate; 130. Screw; 131. Guide rod; 132. Movable block; 133. Cleaning brush; 14. Collection trough; 15. Cleaning motor; 16. Threshing roller; 160. Threshing teeth; 17. Dust suction port; 18. Rice grain outlet; 19. Fixing block; 110. Spring; 111. Filter frame; 112. Screen; 113. Vibration motor; 114. Inner protrusion; 2. Threshing motor; 3. Support leg; 4. Front cover plate; 40. Fixing bolt; 5. Discharge guide plate; 6. Gas collection hood; 60. Extension pipe; 61. Mounting plate; 62. Rotating shaft; 63. Turbine fan; 64. Exhaust motor; 7. External pipe; 70. Collection bag; 8. Mounting frame; 80. Collection drawer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0026] Please see Figures 1-5 This utility model provides a technical solution:

[0027] A rice threshing machine with a vibrating screen includes a threshing box 1 and a threshing roller 16 rotatably installed inside the threshing box 1. The outer circumference of the threshing roller 16 is provided with a plurality of threshing teeth 160. Inside the threshing box 1, below the threshing roller 16, are two filter frames 111. Each filter frame 111 has a screen 112 inserted and installed. A vibrating motor 113 is fixedly installed at the bottom of each filter frame 111. Springs 110 are fixedly installed near the four corners between the two filter frames 111. Two fixing blocks 19 are symmetrically arranged above the upper filter frame 111. The fixing block 19 is fixed to the inner wall of the threshing box 1. Two springs 110 are symmetrically fixed between the filter frame 111 and each fixing block 19. The lower filter frame 111 is inclined and points towards the rice grain outlet 18. A cleaning mechanism is provided above the upper filter frame 111. The cleaning mechanism includes a movable block 132 that moves left and right. A cleaning brush 133 that fits tightly against the screen 112 is installed at the bottom of the movable block 132. A maintenance opening is provided on the front side of the threshing box 1, and a front cover plate 4 is fixedly installed on the outside of the maintenance opening by fixing bolts 40. By setting up a connection structure of two filter frames 111 with vibration motors 113 and springs 110, double-layer vibration screening is achieved, improving the separation efficiency of rice grains and impurities. The cleaning mechanism can automatically clean the screen 112 to avoid clogging. The design of the maintenance opening and the front cover plate 4 facilitates equipment maintenance and screen 112 replacement. The overall structure improves the threshing and cleaning effect and maintenance convenience of the threshing machine.

[0028] In a preferred embodiment, the threshing box 1 has a rice ear inlet 10 near the top, and a feed guide plate 11 is fixedly installed on its outer side. A threshing motor 2 with its output shaft coaxially fixed to the threshing roller 16 is installed on the outer wall of the threshing box 1. A discharge guide plate 5 is fixed on the outer wall of the threshing box 1 below the rice grain outlet 18. The feed guide plate 11 can guide the rice ears to enter the threshing box 1 smoothly, ensuring smooth feeding; the threshing motor 2 provides power to the threshing roller 16, ensuring that the threshing teeth 160 effectively thresh the rice; the discharge guide plate 5 can guide the screened rice grains to be accurately discharged, improving the continuity of feeding, threshing and discharging of the equipment and increasing operating efficiency.

[0029] In a preferred embodiment, the outer wall of the threshing box 1 is provided with a cleaning port 12, which is flush with the cleaning mechanism. A collection trough 14 is fixedly installed on the outer wall of the threshing box 1 below the cleaning port 12. The cleaning port 12 cooperates with the cleaning mechanism to facilitate the cleaning brush 133 to discharge the debris on the screen 112 through the cleaning port 12; the collection trough 14 can collect the discharged debris to prevent the debris from scattering and polluting the environment.

[0030] In a preferred embodiment, the cleaning mechanism further includes an L-shaped plate 13 fixed to the outer wall of the threshing box 1. A lead screw 130, threadedly connected to a movable block 132, is rotatably mounted on the L-shaped plate 13. Two guide rods 131, each passing through the movable block 132, are symmetrically fixed on both sides of the lead screw 130. A cleaning motor 15, with its output shaft coaxially fixed to the lead screw 130, is mounted on the L-shaped plate 13. The cleaning motor 15 drives the lead screw 130 to rotate, and under the action of the guide rods 131, the movable block 132 drives the cleaning brush 133 to move steadily left and right, achieving automatic and uniform cleaning of the screen 112, replacing manual cleaning, reducing labor intensity, while ensuring cleaning effect and maintaining the filtration performance of the screen 112.

[0031] In a preferred embodiment, a dust suction port 17 is provided on the outer wall of the threshing box 1 on the side opposite to the rice ear inlet 10. A gas collecting hood 6 is fixedly installed on the outer wall of the dust suction port 17. An outer connecting pipe 7 is installed on the gas collecting hood 6 through an extension pipe 60. A collection bag 70 is installed on the outer connecting pipe 7. The outer connecting pipe 7 and the extension pipe 60 are connected by a flange. The dust suction port 17 and the gas collecting hood 6 can suck away dust and small impurities generated during the threshing process. The outer connecting pipe 7 and the collection bag 70 can collect these impurities, reducing dust pollution. The flange connection facilitates the disassembly and assembly of the outer connecting pipe 7 and the extension pipe 60, makes it convenient to clean the collection bag 70, improves the working environment, and protects the health of operators.

[0032] In a preferred embodiment, two mounting plates 61 are installed inside the extension tube 60, and a rotating shaft 62 is rotatably mounted between the two mounting plates 61. Several turbine fans 63 are mounted on the outer wall of the rotating shaft 62. An exhaust motor 64 with its output shaft coaxially fixed to the rotating shaft 62 is mounted on one of the mounting plates 61. The exhaust motor 64 drives the turbine fans 63 to rotate and generate suction, enhancing the suction effect of the dust suction port 17 and more efficiently removing dust and impurities generated during threshing.

[0033] In a preferred embodiment, the threshing box 1 has a discharge port at its bottom, and an installation frame 8 is provided below the discharge port. A collection tray 80 is provided inside the installation frame 8, and a support leg 3 is fixedly installed at each of the four corners of the bottom of the threshing box 1. The discharge port facilitates the discharge of impurities that cannot be filtered by the lower screen 112, and the collection tray 80 can collect these impurities for convenient centralized processing; the support legs 3 ensure stable placement of the equipment.

[0034] In a preferred embodiment, each of the two opposing inner walls of the filter frame 111 has an integrally formed inner protrusion 114, and the screen 112 has a strip-shaped notch that engages with the inner protrusion 114. The inner protrusion 114 and the strip-shaped notch are provided to provide some support for the screen 112.

[0035] In operation, the rice thresher with vibrating screen of this utility model works as follows: During operation, rice ears enter the threshing box 1 through the rice ear inlet 10 via the feed guide plate 11. The threshing motor 2 drives the threshing roller 16 to rotate, and the threshing teeth 160 on the threshing roller 16 strike and knead the rice ears, causing the rice grains to fall off. The threshed mixture (rice grains, broken straw, rice husks, etc.) falls onto the upper screen 112. At this time, the vibrating motor 113 at the bottom of the upper filter frame 111 operates, driving the screen 112 to vibrate with the help of the spring 110, performing initial screening of the mixture. Smaller rice grains and impurities fall through the screen holes to the lower inclined screen 112, while larger impurities remain on the upper screen 112.

[0036] The vibration motor 113 of the lower filter frame 111 works synchronously, and combined with the elastic action of the spring 110, it causes the lower screen 112 to vibrate, and performs secondary screening on the falling mixture. The pure rice passes through the screen holes and slides along the inclined screen 112 to the rice grain outlet 18, and is discharged through the discharge guide plate 5. Impurities that cannot pass through the lower screen 112 fall into the collection drawer 80 from the discharge port at the bottom of the threshing box 1.

[0037] The cleaning mechanism can be activated periodically during operation. The cleaning motor 15 drives the lead screw 130 to rotate, causing the movable block 132, under the constraint of the guide rod 131, to move the cleaning brush 133 left and right along the surface of the upper screen 112, pushing the residual impurities on the screen 112 to the cleaning port 12 and falling into the collection tank 14. At the same time, the exhaust motor 64 drives the turbine fan 63 to rotate, generating negative pressure through the air collection hood 6 and the dust suction port 17, sucking in the dust and small impurities generated during the threshing process, and collecting them into the collection bag 70 through the extension pipe 60 and the outer pipe 7, reducing dust pollution.

[0038] If maintenance or replacement of screen 112 is required, the front cover plate 4 can be removed and the operation can be carried out through the maintenance opening. The plug-in structure between screen 112 and filter frame 111 facilitates quick disassembly and assembly, and the whole process realizes automated and continuous operation of rice threshing, cleaning and impurity treatment.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rice thresher with a vibrating screen, characterized in that: The threshing box (1) includes a threshing roller (16) rotatably installed inside the threshing box (1). The threshing roller (16) has several threshing teeth (160) on its outer circumference. Inside the threshing box (1), below the threshing roller (16), are two filter frames (111). Each filter frame (111) has a screen (112) inserted into it. A vibration motor (113) is fixedly installed at the bottom of each filter frame (111). Springs (110) are fixedly installed near the four corners between the two filter frames (111). Two fixing blocks (19) are symmetrically arranged above the upper filter frame (111). (19) is fixed to the inner wall of the threshing box (1). Two springs (110) are symmetrically fixed between the filter frame (111) and each fixed block (19). The filter frame (111) located below is inclined and points to the rice grain outlet (18). A cleaning mechanism is provided above the filter frame (111) located above the filter frame (111). The cleaning mechanism includes a movable block (132) that moves left and right. A cleaning brush (133) that fits tightly against the screen (112) is installed at the bottom of the movable block (132). A maintenance opening is provided on the front side of the threshing box (1), and a front cover plate (4) is fixedly installed on the outside of the maintenance opening by fixing bolts (40).

2. The rice thresher with vibrating screen as described in claim 1, characterized in that: The threshing box (1) has a rice ear inlet (10) near the top and a feeding guide plate (11) is fixedly installed on its outside. The threshing motor (2) with the output shaft coaxially fixed with the threshing roller (16) is installed on the outer wall of the threshing box (1). A discharge guide plate (5) is fixed on the outer wall of the threshing box (1) below the rice grain outlet (18).

3. The rice thresher with vibrating screen as described in claim 2, characterized in that: The outer wall of the threshing box (1) is provided with a cleaning port (12), which is flush with the cleaning mechanism. A collection trough (14) is fixedly installed on the outer wall of the threshing box (1) below the cleaning port (12).

4. The rice thresher with vibrating screen as described in claim 3, characterized in that: The cleaning mechanism also includes an L-shaped plate (13) fixed on the outer wall of the threshing box (1). A lead screw (130) threadedly connected to the movable block (132) is rotatably mounted on the L-shaped plate (13), and two guide rods (131) that pass through the movable block (132) are symmetrically fixed on both sides of the lead screw (130). A cleaning motor (15) with an output shaft coaxially fixed to the lead screw (130) is mounted on the L-shaped plate (13).

5. The rice thresher with vibrating screen as described in claim 4, characterized in that: A dust suction port (17) is provided on the outer wall of the threshing box (1) opposite to the rice ear inlet (10), and a gas collection hood (6) is fixedly installed on the outer wall of the dust suction port (17). The gas collection hood (6) is connected to an outer pipe (7) through an extension pipe (60). A collection bag (70) is installed on the outer pipe (7). The outer pipe (7) and the extension pipe (60) are connected by a flange.

6. The rice thresher with vibrating screen as described in claim 5, characterized in that: The extension tube (60) has two mounting plates (61) installed inside. A rotating shaft (62) is rotatably installed between the two mounting plates (61). Several turbine fans (63) are installed on the outer wall of the rotating shaft (62). One of the mounting plates (61) has an exhaust motor (64) whose output shaft is coaxially fixed with the rotating shaft (62).

7. The rice thresher with vibrating screen as described in claim 6, characterized in that: The threshing box (1) has a discharge port at the bottom and an installation frame (8) below the discharge port. A collection tray (80) is provided inside the installation frame (8). A support leg (3) is fixedly installed at each of the four corners of the bottom of the threshing box (1).

8. The rice thresher with vibrating screen as described in claim 7, characterized in that: The inner walls of the filter frame (111) are integrally formed with an inner protrusion (114) on both sides, and the screen (112) has a strip-shaped notch that is inserted into the inner protrusion (114).

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