A crop seed screening and grading apparatus

Abstract

The utility model discloses a kind of crop seed screening grading devices, including rack, the crankshaft being installed with being set along horizontal direction in the bottom of rack, multiple connecting rods are hingedly installed on crankshaft, the end of connecting rod away from crankshaft is hingedly connected with the bottom end of oscillating shaft, oscillating shaft is arranged in linear bearing along vertical direction, the top end of oscillating shaft is respectively connected with screen assembly;Screen assembly includes tray and pressure disc being set along vertical direction symmetry, multiple screenings are installed with being set in layers between tray and pressure disc, the bottom of multiple screenings is equipped with impurity tray.The screening grading device provided by the utility model can complete the screening of multiple different seeds simultaneously through the parallel operation of multiple screening stations, greatly improve productivity, and can also solve the problem of fixed number of screen layers, unable to flexibly adapt to multi-stage screening requirements.

Description

Technical Field

[0001] This utility model relates to a crop seed screening and grading device, belonging to the field of seed screening and grading technology. Background Technology

[0002] Seed screening and grading are crucial steps in modern agriculture and seed processing. Their core purpose is to separate mixed, unprocessed seeds into uniform grades based on their physical characteristics, such as size and weight. This is essential for improving seed quality, ensuring germination rates, achieving precision sowing, and increasing crop yields.

[0003] Traditional size-based grading devices are typically flat screens or cylindrical screens. However, practical experience has shown that flat screens or cylindrical screens still have the following technical problems: 1. Only one batch of one type of seed can be screened at a time. If multiple different types of seeds need to be processed, the machine needs to be stopped and the screens of different mesh sizes need to be replaced. The whole process is very time-consuming and labor-intensive, resulting in low overall production efficiency.

[0004] 2. The number of screen layers is fixed. If it is necessary to change the number of grading levels, such as changing from three-level to four-level sorting, the entire screen box needs to be replaced or complex mechanical adjustments need to be made, which is very inconvenient.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] This invention addresses the shortcomings of the prior art by providing a crop seed screening and grading device. It can simultaneously complete the screening of various different seeds through multiple screening stations operating in parallel, significantly increasing production capacity. It can also solve the problem of fixed screen layers and inability to flexibly adapt to multi-level screening needs.

[0007] To solve the above technical problems, the present invention adopts the following technical solution: A crop seed screening and grading device includes a frame, a crankshaft mounted at the bottom of the frame in a horizontal direction, multiple connecting rods hinged to the crankshaft, the ends of the connecting rods away from the crankshaft being hinged to the bottom end of an oscillating shaft, the oscillating shaft passing through a linear bearing in a vertical direction, and screen assemblies connected to the top of the oscillating shaft; the screen assemblies include trays and pressure plates symmetrically arranged in a vertical direction, multiple screens stacked between the trays and pressure plates, and impurity trays at the bottom of the multiple screens.

[0008] Furthermore, the driving end of the crankshaft is connected to the geared motor, and the driven end of the crankshaft passes through the bearing housing.

[0009] Furthermore, the geared motor is fixedly mounted to the outside of the frame by bolts.

[0010] Furthermore, the bearing housing is fixedly installed to the inside of the frame by bolts.

[0011] Furthermore, the linear bearing is fixed to the top of the frame in the vertical direction.

[0012] Furthermore, the mesh count of the multiple screens gradually increases from top to bottom.

[0013] Furthermore, the tray is fixed to the top of the oscillating shaft, and the inside of the tray is provided with a groove for positioning and installing the impurity tray.

[0014] Furthermore, the bottom of the pressure plate is provided with a groove for engaging the opening of the screen.

[0015] Furthermore, the two sides of the tray and the pressure plate are connected by two turnbuckles arranged symmetrically on the left and right. The top of the turnbuckle is connected to the side of the pressure plate, and the bottom of the turnbuckle is connected to the side of the tray.

[0016] Furthermore, the bottom of the frame is equipped with self-locking rollers.

[0017] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages: By utilizing a crankshaft connecting rod mechanism, the rotational motion of the geared motor is converted into precise, reciprocating vertical linear motion of multiple screen components. The synchronous oscillation of these multiple screen components enables simultaneous screening and grading of various seeds. Compared to the serial operation of traditional equipment, this device achieves parallel operation, resulting in a several-fold increase in production capacity.

[0018] The tray and pressure plate are connected using turnbuckles. The length of the turnbuckles is adjustable, and the number of screens can be easily increased or decreased between the tray and pressure plate. The number of screens can be flexibly selected according to the number of screening grades to meet the needs of multi-stage screening.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the screen assembly.

[0021] In the diagram, 1-frame, 2-roller, 3-crankshaft, 4-bearing housing, 5-gear motor, 6-connecting rod, 7-oscillating shaft, 8-linear bearing, 9-screen assembly, 91-screen, 92-impurity disc, 93-tray, 94-pressure plate, 95-turn bolt. Detailed Implementation

[0022] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown in the figure, this utility model provides a crop seed screening and grading device, including a frame 1, a crankshaft 3 arranged in a horizontal direction installed at the bottom of the frame 1, a plurality of connecting rods 6 hinged on the crankshaft 3, the end of the connecting rod 6 away from the crankshaft 3 is hinged to the bottom end of the oscillating shaft 7, the oscillating shaft 7 is inserted in a linear bearing 8 in a vertical direction, and the top end of the oscillating shaft 7 is connected to a screen assembly 9.

[0024] The driving end of the crankshaft 3 is connected to the geared motor 5, and the driven end of the crankshaft 3 is inserted into the bearing seat 4. The geared motor 5 drives the crankshaft 3, connecting rod 6 and oscillating shaft 7 to move in sequence, thereby driving multiple screen components 9 to oscillate and achieve seed screening and grading.

[0025] The geared motor 5 is fixedly installed on the outside of the frame 1 by bolts, and the bearing seat 4 is fixedly installed on the inside of the frame 1 by bolts.

[0026] The linear bearing 8 is fixed to the top of the frame 1 in the vertical direction.

[0027] The screen assembly 9 includes a tray 93 and a pressure plate 94 symmetrically arranged in the vertical direction. The tray 93 is fixed to the top of the oscillating shaft 7. Multiple screens 91 are stacked between the tray 93 and the pressure plate 94. The bottom of the multiple screens 91 is provided with an impurity plate 92.

[0028] Multiple mesh screens 91 have a gradually increasing mesh size from top to bottom, which enables the seeds to be screened step by step. The number of mesh screens 91 can be flexibly selected according to the number of screening grades required.

[0029] The tray 93 has a groove inside for positioning and installing the impurity tray 92, and the bottom of the pressure plate 94 has a groove for engaging the opening of the screen 91.

[0030] The tray 93 and the pressure plate 94 are connected on both sides by two turnbuckles 95 arranged symmetrically on the left and right. The top of the turnbuckle 95 is connected to the side of the pressure plate 94, and the bottom of the turnbuckle 95 is connected to the side of the tray 93. The length of the turnbuckle 95 is adjustable to accommodate different numbers of screens 91, and different numbers of screens 91 can be reliably pressed.

[0031] The bottom of the frame 1 is equipped with rollers 2, which have a self-locking function, making the whole machine easy to move.

[0032] The specific working principle of this utility model is as follows: This invention utilizes a crankshaft connecting rod mechanism to convert the rotational motion of a geared motor into precise, reciprocating vertical linear motion of a screen assembly. Through multiple layers of screens with different mesh sizes, vibration and gravity are used to grade and screen crop seeds according to their size.

[0033] This invention can drive multiple screen components to oscillate, enabling simultaneous screening and grading of various seeds.

[0034] The screen assembly of this utility model includes multiple screens, and the number of screens can be flexibly selected according to the required number of screening grades.

[0035] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A crop seed screening and grading device, characterized in that: The machine includes a frame (1), a crankshaft (3) arranged horizontally is installed at the bottom of the frame (1), a plurality of connecting rods (6) are hinged on the crankshaft (3), the end of the connecting rod (6) away from the crankshaft (3) is hinged to the bottom end of the oscillating shaft (7), the oscillating shaft (7) is inserted vertically in a linear bearing (8), and the top end of the oscillating shaft (7) is connected to a screen assembly (9); the screen assembly (9) includes a tray (93) and a pressure plate (94) arranged symmetrically in the vertical direction, a plurality of screens (91) are installed between the tray (93) and the pressure plate (94), and an impurity plate (92) is provided at the bottom of the plurality of screens (91).

2. The crop seed screening and grading device as described in claim 1, characterized in that: The driving end of the crankshaft (3) is connected to the geared motor (5), and the driven end of the crankshaft (3) is inserted into the bearing housing (4).

3. The crop seed screening and grading device as described in claim 2, characterized in that: The geared motor (5) is fixedly installed on the outside of the frame (1) by bolts.

4. The crop seed screening and grading device as described in claim 2, characterized in that: The bearing housing (4) is fixed to the inside of the frame (1) by bolts.

5. The crop seed screening and grading device as described in claim 1, characterized in that: The linear bearing (8) is fixed to the top of the frame (1) in the vertical direction.

6. The crop seed screening and grading device as described in claim 1, characterized in that: Multiple mesh screens (91) gradually increase in mesh size from top to bottom.

7. The crop seed screening and grading device as described in claim 1, characterized in that: The tray (93) is fixed to the top of the oscillating shaft (7), and the inside of the tray (93) is provided with a groove for positioning and installing the impurity tray (92).

8. The crop seed screening and grading device as described in claim 1, characterized in that: The bottom of the pressure plate (94) is provided with a groove for engaging the opening of the screen (91).

9. The crop seed screening and grading device as described in claim 1, characterized in that: The two sides of the tray (93) and the pressure plate (94) are connected by two turnbuckles (95) arranged symmetrically on the left and right. The top of the turnbuckle (95) is connected to the side of the pressure plate (94), and the bottom of the turnbuckle (95) is connected to the side of the tray (93).

10. A crop seed screening and grading device as described in claim 1, characterized in that: The bottom of the frame (1) is equipped with self-locking rollers (2).

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