Dual-purpose combined sieve with size-variable sieve pores
By designing a dual-purpose combined screen with variable screen size, using the technology of working attitude conversion and double-thread screw drive, the problem of fixed screen size in the existing technology is solved, efficient screening of large and small particles is achieved, and the universality of equipment and resource utilization is improved.
Patent Information
- Application Number
- CN202420785670.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The existing screen holes of the cleaning device are fixed in size and cannot meet the screening needs of different materials, resulting in increased equipment costs and maintenance costs and waste of resources.
A dual-purpose combined screen with variable screen size is designed. Through the conversion of working posture, large and small particles are screened. The reverse translation of the lower grid sheet is driven by a double-threaded screw and a stepper motor to achieve dynamic adjustment of the screen size.
It improves the versatility of machinery, reduces equipment costs and maintenance costs, avoids resource waste, and realizes efficient screening of different materials.
Smart Images
Figure CN222625351U_ABST
Abstract
Description
Technical Field
[0001] The invention relates to agricultural machinery, in particular to a dual-purpose combined screen with variable screen hole sizes. Background Art
[0002] The existing cleaning devices have fixed screen holes and can screen a single fixed material. For different materials or requirements, multiple cleaning screens may be needed, which increases equipment and maintenance costs. When processing a certain material, other cleaning screens may be idle, resulting in a waste of resources, including energy and human resources. Summary of the invention
[0003] The present invention aims at the above technical problems and develops a dual-purpose combined screen with variable screen hole size, which can realize a machine that can screen both small materials and large materials, thereby improving the versatility of the machine.
[0004] The objective of the present invention is achieved in this way. A dual-purpose combined screen with variable sieve hole size is characterized in that the dual-purpose combined screen has two working postures, namely, working posture a and working posture b. When in working posture a, large particles can be screened, and when in working posture b, small particles can be screened.
[0005] The upper screen surface (1) is arranged with two kinds of screen holes, large screen holes (7) and small screen holes a (8). The lower grid plate a (2) has a straight line side on one side and a curved line side on the other side. The lower grid plate a (3) has a straight line side on one side and a curved line side on the other side. The lower grid plate a (3) and the lower grid plate b (2) are placed back to back. When the straight lines of the lower grid plate a (2) and the lower grid plate b (3) are in contact, the grid plates are sealed without pores; when the curved lines of the lower grid plate a (2) and the lower grid plate b (3) are in contact, small screen holes b (9) are formed.
[0006] When the dual-purpose combined screen is in working posture a, the straight edges of the lower grid piece a (2) and the straight edges of the lower grid piece b (3) are in contact and completely cover the small sieve holes a (8) of the upper sieve surface (1), while the large sieve holes (7) of the upper sieve surface are not blocked, thereby enabling large particles to be screened; when the dual-purpose combined screen is in working posture b, the curved edges of the lower grid piece a (2) and the curved edges of the lower grid piece b (3) are in contact and form a row of small sieve holes b (9) that are concentric with the large sieve holes (7) of the upper sieve surface (1), at which time the large sieve holes of the upper sieve surface are half-blocked by the small sieve holes b (9) formed by the combination of the lower grid piece a (2) and the lower grid piece b (3), while the small sieve holes a (8) of the upper sieve surface are not blocked, thereby enabling small particles to be screened.
[0007] One end of the double-threaded lead screw (6) is fixed on the stepping motor (4), and the other end is limited in three-dimensional movement by the lower supporting plate (10). The left-handed external thread of the double-threaded lead screw (6) cooperates with the left-handed internal thread (11) of the lower grid plate a (2), and the right-handed external thread of the double-threaded lead screw (6) cooperates with the right-handed internal thread (12) of the lower grid plate b (3). The stepping motor (4) drives the double-threaded lead screw (6) to rotate, and the double-threaded lead screw (6) drives the lower grid plate a (2) and the lower grid plate b (3) to translate in the opposite direction, so as to realize the mutual conversion between the working posture a and the working posture b of the dual-purpose combined screen. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic diagram of a dual-purpose combined sieve with variable mesh size;
[0009] Figure 2 It is a top view of a dual-purpose combined sieve with variable mesh size in working state a;
[0010] Figure 3 It is a partial enlarged top view of a dual-purpose combined sieve with variable mesh size in working state a;
[0011] Figure 4 It is a bottom view of a dual-purpose combined screen with variable mesh size in working state a;
[0012] Figure 5 It is a partial enlarged bottom view of a dual-purpose combined sieve with variable mesh size in working state a;
[0013] Figure 6 It is a top view of a dual-purpose combined screen with variable screen size in working state b;
[0014] Figure 7 It is a partial enlarged top view of a dual-purpose combined sieve with variable mesh size in working state b;
[0015] Figure 8 It is a bottom view of a dual-purpose combined screen with variable mesh size in working state b;
[0016] Fig. 9 It is a partial enlarged bottom view of a dual-purpose combined sieve with variable mesh size in working state b;
[0017] Fig.10 is a schematic diagram of the lower grid a;
[0018] Fig.11 is a schematic diagram of the lower grid b;
[0019] Description of part numbers in the figure:
[0020] 1. Upper screen surface, 2. Lower grid plate a, 3. Lower grid plate b, 4. Stepper motor, 5. Stepper motor cover, 6. Double-threaded lead screw, 7. Large screen hole, 8. Small screen hole a, 9. Small screen hole b, 10. Lower supporting plate, 11. Left-handed internal thread, 12. Right-handed internal thread. DETAILED DESCRIPTION
[0021] The following is a detailed description of an implementation scheme of the present invention in conjunction with the accompanying drawings. A double-layer, bidirectional corn kernel cleaning device is characterized in that the dual-purpose combined screen has two working postures, namely, working posture a and working posture b. When in working posture a, large particles can be screened, and when in working posture b, small particles can be screened.
[0022] The upper screen surface (1) is provided with two kinds of screen holes, namely, large screen holes (7) and small screen holes a (8). The lower grid pieces a (2) and b (3) are closely attached to the upper screen surface under the support of a double-threaded lead screw (6).
[0023] The double-threaded lead screw (6) is fixed on the stepping motor (4) and is limited in three-dimensional movement by the lower support plate (10). The left-handed external thread of the double-threaded lead screw (6) cooperates with the left-handed internal thread (11) of the lower grid plate a (2), and the right-handed external thread of the double-threaded lead screw (6) cooperates with the right-handed internal thread (12) of the lower grid plate b (3).
[0024] The working principle of the present invention is that a stepping motor (4) drives a double-threaded lead screw (6) to rotate, and the double-threaded lead screw (6) drives a lower grid plate a (2) and a lower grid plate b (3) to translate in opposite directions, thereby realizing the mutual conversion between the working posture a and the working posture b of the dual-purpose combined screen.
[0025] The two long sides of the lower grid sheet a (2) are a straight side and a curved side respectively. The lower grid sheet a (2) and the lower grid sheet b (3) are placed back to back. When the straight sides of the lower grid sheet a (2) and the lower grid sheet b (3) are in contact, the grid sheets are closed without pores; when the curved sides of the lower grid sheet a (2) and the lower grid sheet b (3) are in contact, a row of small sieve holes b (9) with the same center as the large sieve holes on the upper sieve surface are combined.
[0026] When the dual-purpose combined screen is in working posture a, the straight edges of the lower grid piece a (2) and the straight edges of the lower grid piece b (3) are in contact and completely cover the small sieve holes a (8) of the upper sieve surface (1), while the large sieve holes (7) of the upper sieve surface are not blocked, thereby enabling large particles to be screened; when the dual-purpose combined screen is in working posture b, the curved edges of the lower grid piece a (2) and the curved edges of the lower grid piece b (3) are in contact and form a row of small sieve holes b (9) that are concentric with the large sieve holes (7) of the upper sieve surface (1), at which time the large sieve holes of the upper sieve surface are half-blocked by the small sieve holes b (9) formed by the combination of the lower grid piece a (2) and the lower grid piece b (3), while the small sieve holes a (8) of the upper sieve surface are not blocked, thereby enabling small particles to be screened.
[0027] The dual-purpose combined screen with variable screen hole size designed by the present invention has the characteristics of simple and reliable structure and convenient operation, can solve the problem that the screen body can only screen a single material, and improves the use efficiency of the screen body.
Claims
1. A dual-purpose combined sieve with variable sieve hole size, characterized in that: The dual-purpose combined screen has two working postures, namely, working posture a and working posture b. When in working posture a, large particles can be screened, and when in working posture b, small particles can be screened.
2. A dual-purpose combined screen with variable mesh size according to claim 1, characterized in that: The upper screen surface (1) is arranged with two kinds of screen holes, large screen holes (7) and small screen holes a (8); the lower grid plate a (2) has one straight edge and one curved edge; the lower grid plate b (3) has one straight edge and one curved edge; the lower grid plate a (2) and the lower grid plate b (3) are placed back to back; when the straight edges of the lower grid plate a (2) and the lower grid plate b (3) are in contact, the grid plates are sealed without pores; when the curved edges of the lower grid plate a (2) and the lower grid plate b (3) are in contact, small screen holes b (9) are formed.
3. A dual-purpose combined screen with variable mesh size according to claim 1, characterized in that: When the dual-purpose combined screen is in working posture a, the straight edges of the lower grid piece a (2) and the straight edges of the lower grid piece b (3) are in contact and completely cover the small sieve holes a (8) of the upper sieve surface (1), while the large sieve holes (7) of the upper sieve surface are not blocked, thereby enabling large particles to be screened; when the dual-purpose combined screen is in working posture b, the curved edges of the lower grid piece a (2) and the curved edges of the lower grid piece b (3) are in contact and form a row of small sieve holes b (9) that are concentric with the large sieve holes (7) of the upper sieve surface (1), at which time the large sieve holes of the upper sieve surface are half-blocked by the small sieve holes b (9) formed by the combination of the lower grid piece a (2) and the lower grid piece b (3), while the small sieve holes a (8) of the upper sieve surface are not blocked, thereby enabling small particles to be screened.
4. A dual-purpose combined screen with variable mesh size according to claim 1, characterized in that: The left-handed external thread of the double-threaded lead screw (6) cooperates with the left-handed internal thread (11) of the lower grid plate a (2), and the right-handed external thread of the double-threaded lead screw (6) cooperates with the right-handed internal thread (12) of the lower grid plate b (3). The stepping motor (4) drives the double-threaded lead screw (6) to rotate, and the double-threaded lead screw (6) drives the lower grid plate a (2) and the lower grid plate b (3) to translate in opposite directions, thereby realizing the mutual conversion of the working posture a and the working posture b of the dual-purpose combined screen.