Electric grain sorting machine
The eccentric wheel and limiting convex structure drive the screen to perform lateral reciprocating motion, which solves the problem of low utilization rate of the gap in the middle area of the screen in small electric grain screening machines and improves screening efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GU FENGYUAN (HUBEI) FOOD CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-03
AI Technical Summary
In existing small electric grain screening machines, the utilization rate of the gaps in the middle area of the screen is not high during the rotation process, resulting in limited screening efficiency.
The eccentric wheel and limiting convex structure drive the movable plate and screen to reciprocate along the transverse slide rail, so that the grain moves laterally in the screen. By utilizing the holes in the central area of the screen, the eccentric wheel pushes the limiting convex to drive the movable plate to achieve the transverse reciprocating motion of the screen.
It improves the utilization rate of the pores in the central area of the screen, enhances the screening efficiency, and solves the problem of low utilization rate of the pores in the central area of the screen.
Smart Images
Figure CN224443692U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screening machine technology, specifically an electric grain screening machine. Background Technology
[0002] Electric grain screening machines are mainly divided into two types according to their size. Large-size electric grain screening machines are often used for screening large quantities of grain according to particle size. Since the use and price of grain are less affected by particle size, they are used less often. On the other hand, small-size electric grain screening machines for laboratory use are frequently used. They are usually used for quality testing after sampling surveys of large quantities of grain. Based on the screening, it can be determined whether the grain variety is uniform and whether it contains impurities and imperfect grains. They are often used in laboratories of agricultural research units and laboratories of agricultural production enterprises.
[0003] Most existing small electric grain screens are tabletop structures driven by high-precision motors. The screen body is driven to rotate in a planar manner through an eccentric transmission mechanism. The electrical control part uses a single-chip microcomputer to control the forward and reverse rotation. Impurities and imperfect grains in the grain are separated through the pores of the screen.
[0004] However, because electric grain screening machines operate in a relatively gentle and non-violent manner, the rotation speed of the screen is relatively slow during the screening process. After the grain is added to the screen and rotates, it tends to accumulate near the side wall of the screen. During the rotation, the speed of the screen is not fast, and the acceleration direction gradually changes along the circumferential tangent. Often, the inertia is insufficient to move the grain near the side wall of the screen to the central area of the screen, resulting in a large area of pores in the central area of the screen not being utilized, leading to low actual screening efficiency. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides an electric grain screening machine, which solves the problem that the screening efficiency of existing experimental electric grain screening machines is limited due to the low utilization rate of the gaps in the middle area of the screen through rotary motion.
[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:
[0007] An electric grain sorting machine includes a main unit and a drive motor installed inside the main unit. The top of the main unit is provided with a turntable fixed on the shaft extension of the drive motor. An eccentric wheel is installed on the turntable. Two slide rails are symmetrically fixed at the front and back of the top of the main unit. A movable plate is slidably connected between the two slide rails. Two limiting protrusions are symmetrically fixed at the bottom of the movable plate. The eccentric wheel is movably engaged between the two limiting protrusions.
[0008] The top of the movable plate is fixed with a fixed base, and several screens are stacked on the fixed base. The top of the screens is equipped with a top cover, and the edge of the top cover is provided with multiple fixed ears. The edge of the fixed base is fixed with multiple rotating hinge seats, and the rotating hinge seats are rotatably connected to a long screw. The long screw is movably engaged with the fixed ears, and a knob nut is installed on the long screw that presses against the fixed ears.
[0009] Preferably, the slide rail and the limiting protrusion are perpendicular to each other, and the slide rail is arranged in the transverse direction, while the limiting protrusion is arranged in the longitudinal direction.
[0010] Preferably, the top, bottom and sides of the inner wall of the slide rail are provided with rollers that are tactilely connected to the movable plate.
[0011] Preferably, there are at least four sets of the rotating hinge seat, long screw, fixing lug and knob nut, which are equidistantly arranged along the circumference of the screen.
[0012] Preferably, the screen is located directly above the turntable, and the two are coaxially arranged.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] The turntable of this invention drives the screen and movable plate to reciprocate along the transverse slide rail via an eccentric wheel and a limiting protrusion. The grains in the screen move laterally back and forth in the screen due to inertia, which makes the magnitude and direction of the grains' acceleration change rapidly. The pores in the central area of the screen are fully utilized, improving the screening efficiency. This solves the problem of low utilization of the pores in the central area of the screen in existing experimental electric grain screening machines, which limit the screening efficiency due to the rotary motion screening. Attached Figure Description
[0015] Figure 1 This is a front view of the present utility model;
[0016] Figure 2 This is a side view of the present invention;
[0017] Figure 3 This is a perspective view of the bottom structure of the movable plate of this utility model;
[0018] Figure 4 This is a top view of the top cover and long screw of this utility model.
[0019] In the diagram: 1. Main unit; 2. Drive motor; 3. Turntable; 4. Eccentric wheel; 5. Slide rail; 6. Movable plate; 7. Limiting protrusion; 8. Fixed seat; 9. Screen; 10. Top cover; 11. Fixed ear; 12. Rotary hinge seat; 13. Long screw; 14. Knob nut. Detailed Implementation
[0020] 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.
[0021] like Figure 1-4 As shown, this utility model provides a technical solution: an electric grain screening machine, including a main unit 1 and a drive motor 2 installed inside the main unit 1. A turntable 3 is fixed on the shaft extension of the drive motor 2 at the top of the main unit 1. An eccentric wheel 4 is installed on the turntable 3. Two slide rails 5 are symmetrically fixed at the front and back of the top of the main unit 1. A movable plate 6 is slidably connected between the two slide rails 5. Rollers that are tactilely connected to the movable plate 6 are provided on the top, bottom and side of the inner wall of the slide rails 5.
[0022] Two limiting protrusions 7 are symmetrically fixed at the bottom of the movable plate 6. The slide rail 5 is perpendicular to the limiting protrusions 7 and is arranged in the horizontal direction. The limiting protrusions 7 are arranged in the vertical direction. The eccentric wheel 4 is movably engaged between the two limiting protrusions 7.
[0023] The top of the movable plate 6 is fixed with a fixed base 8. Several mesh screens 9 are stacked on the fixed base 8. The mesh screens 9 are located directly above the turntable 3 and are coaxially arranged. The top of the mesh screens 9 is equipped with a top cover 10, and the edge of the top cover 10 is provided with multiple fixing ears 11.
[0024] Multiple rotating hinge seats 12 are fixed to the edge of the fixed seat 8. The rotating hinge seats 12 are rotatably connected to long screws 13. The long screws 13 are movably engaged with the fixed ears 11, and a knob nut 14 is installed on the long screws 13 and pressed on the fixed ears 11. There are at least four sets of rotating hinge seats 12, long screws 13, fixed ears 11 and knob nuts 14, and they are equidistant from each other along the circumference of the screen 9.
[0025] Working principle:
[0026] The drive motor 2 drives the turntable 3 to rotate, which pushes the limiting protrusion 7 through the eccentric wheel 4. The limiting protrusion 7 pushes the movable plate 6, which is restricted to moving only laterally under the action of the guide rail. Thus, the turntable 3 drives the movable plate 6 and the fixed seat 8 and screen 9 above it to move back and forth along the slide rail 5 through the eccentric wheel 4. The grain in the screen 9 is pushed and rolled by the side walls of the screen 9. During half a cycle of the screen 9's lateral movement, the acceleration of the grain first increases and then decreases, and then changes direction, so that the grain can move left and right inside the screen 9. The pores in the central area of the screen 9 are fully utilized, thereby improving the grain screening efficiency.
[0027] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0028] 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 can 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 electric grain sorting machine, comprising a main machine (1) and a driving motor (2) installed inside the main machine (1), a rotating disc (3) fixed on the shaft extension of the driving motor (2) is arranged on the top of the main machine (1), characterized in that: An eccentric wheel (4) is installed on the turntable (3). Two slide rails (5) are symmetrically fixed at the top of the main unit (1). A movable plate (6) is slidably connected between the two slide rails (5). Two limiting protrusions (7) are symmetrically fixed at the bottom of the movable plate (6). The eccentric wheel (4) is movably engaged between the two limiting protrusions (7). The top of the movable plate (6) is fixed with a fixed seat (8), and several mesh screens (9) are stacked on the fixed seat (8). The top of the mesh screens (9) is fitted with a top cover (10). The edge of the top cover (10) is provided with multiple fixed ears (11). The edge of the fixed seat (8) is fixed with multiple rotating hinge seats (12). The rotating hinge seat (12) is rotatably connected to a long screw (13). The long screw (13) is movably engaged with the fixed ears (11), and a knob nut (14) is installed on the long screw (13) pressing against the fixed ears (11).
2. An electric grain sorting machine according to claim 1, characterized in that: The slide rail (5) is perpendicular to the limiting protrusion (7) and the slide rail (5) is arranged in the transverse direction, while the limiting protrusion (7) is arranged in the longitudinal direction.
3. An electric grain sorting machine according to claim 1, characterized in that: The top, bottom and sides of the inner wall of the slide rail (5) are provided with rollers that are tactilely connected to the movable plate (6).
4. An electric grain sorting machine according to claim 1, characterized in that: There are at least four sets of the rotating hinge seat (12), long screw (13), fixed ear (11) and knob nut (14), which are equidistantly arranged along the circumference of the screen (9).
5. An electric grain sorting machine according to claim 1, characterized in that: The screen (9) is located directly above the turntable (3), and the two are coaxially arranged.