Blanking mechanism
By using the reverse rotation of the main guide roller and the auxiliary guide roller, along with the design of the guide block and the deflector plate, the problem of material accumulation in the feeding mechanism is solved, achieving stable and uniform material conveying and reducing equipment failure and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HONGYUN HONGHE TOBACCO (GRP) CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-19
AI Technical Summary
In the existing feeding mechanism, the main and auxiliary guide rollers rotate in the same direction, causing tobacco stems to accumulate inside the bin, resulting in production interruptions and equipment overload, and increasing maintenance costs.
The design features a main guide roller and a secondary guide roller rotating in opposite directions, combined with a guide block and a multi-row material feeding plate structure, ensuring smooth material flow and avoiding dead corners.
It completely eliminated the problem of material accumulation, improved production stability, and reduced equipment overload and maintenance costs.
Smart Images
Figure CN224257838U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of tobacco machinery technology, and in particular to a material feeding mechanism. Background Technology
[0002] In the re-drying process of tobacco leaves, the tobacco stems produced after the initial threshing and air-sorting of the first-cured tobacco leaves need to be evenly conveyed to subsequent processes via a feeding mechanism. For example... Figure 1 As shown, the existing material feeding mechanism consists of a feeding pipe, a bin, a main guide roller, a secondary guide roller, and a material feeding port. The main and secondary guide rollers are driven by the same stepper motor and reducer, and the guide rollers rotate in the same direction through a transmission chain and meshing gears.
[0003] However, limited by the existing drive mechanism, the main and auxiliary guide rollers rotate in the same direction (e.g., both clockwise). This leads to a key contradiction: when the main guide roller throws the tobacco stems to the left side of the bin (intended to fall into the area of the auxiliary guide rollers), the auxiliary guide rollers push the tobacco stems in the opposite direction to the right side of the bin for discharge. This movement direction of the auxiliary guide rollers is opposite to the natural trajectory of the tobacco stems falling from the main guide rollers, causing the tobacco stems to accumulate inside the bin, especially between the auxiliary guide rollers and the bin sidewalls. When the tobacco stem flow rate increases, blockages can easily form here, causing production interruptions, equipment overload damage, and increased manual cleaning and maintenance costs.
[0004] Therefore, this application proposes a feeding mechanism that can solve the problem of dead corners for tobacco stem accumulation caused by the co-rotation of the main and auxiliary guide rollers, while retaining the original design intention of the dual-roller structure for graded flow guidance and uniform feeding. Utility Model Content
[0005] The main purpose of this application is to provide a feeding mechanism that aims to solve the technical problem in the prior art where the main and auxiliary guide rollers rotate in the same direction, which easily creates dead corners for tobacco stem accumulation.
[0006] To achieve the above objectives, this application provides the following technical solution:
[0007] A material feeding mechanism, comprising:
[0008] The shell, with an internal cavity forming a receiving chamber;
[0009] A main guide roller and a secondary guide roller are arranged vertically and parallel to each other within the receiving cavity, wherein the main guide roller is configured to rotate along a first direction and the secondary guide roller is configured to rotate along a second direction opposite to the first direction;
[0010] The guide block has one end fixed to the inner wall of the receiving cavity and located downstream of the rotation tangent of the main guide roller, and the other end extends between the main guide roller and the auxiliary guide roller to prevent material from entering the conveying dead zone area formed between the auxiliary guide roller and the inner wall of the receiving cavity.
[0011] As a further improvement of this application, the upper and lower sides of the guide block are respectively provided with a first arc surface with a concave surface facing the main guide roller and a second arc surface with a concave surface facing the auxiliary guide roller, and the first arc surface and the second arc surface approach each other from the fixed end to the extended end of the guide block.
[0012] As a further improvement of this application, the top of the housing is provided with a feed inlet, which is located upstream of the rotation tangential direction of the main guide roller; the bottom of the housing is provided with a discharge port, which is positioned directly opposite the auxiliary guide roller.
[0013] As a further improvement of this application, a plurality of first material-pushing plates are vertically fixed on the circumferential surface of the main guide roller. The first material-pushing plates are arranged in a ring around the axis of the main guide roller and extend along its axial direction to form multiple rows of material-pushing units. A plurality of second material-pushing plates are vertically fixed on the circumferential surface of the auxiliary guide roller. The second material-pushing plates are arranged in a ring around the axis of the auxiliary guide roller and extend along its axial direction to form multiple rows of material-pushing units.
[0014] As a further improvement of this application, the minimum gap between the outer edge of the first feeding plate and the inner wall of the receiving cavity is less than or equal to the minimum size of the preset material; the minimum gap between the outer edge of the second feeding plate and the inner wall of the receiving cavity is less than or equal to the minimum size of the preset material.
[0015] As a further improvement of this application, the maximum distance between the outer edges of two adjacent first feeding plates is less than the height of the feed inlet; to prevent the material from falling directly into the bottom of the receiving cavity when any first feeding plate rotates away from above the feed inlet and the subsequent first feeding plate fails to receive the material in time.
[0016] As a further improvement of this application, the material feeding mechanism also includes a driving device, which is connected to the main guide roller and the auxiliary guide roller through a reverse transmission mechanism, driving them to rotate in opposite directions.
[0017] The technical solution provided in this application may include the following beneficial effects:
[0018] During use, this application utilizes the reverse rotation design of the main guide roller and the auxiliary guide roller to ensure that the feeding direction of the auxiliary guide roller is consistent with the natural falling trajectory of the material, thus completely eliminating the material reverse pushing conflict caused by co-rotation. Combined with the suspended extension structure of the guide block, the material is guided to seamlessly transition from the main guide roller to above the auxiliary guide roller, completely avoiding the dead corner of accumulation between the main and auxiliary rollers, and fundamentally solving the problems of production interruption, equipment overload and high maintenance costs caused by material blockage. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the material feeding mechanism in the prior art;
[0021] Figure 2 This is a schematic diagram of the structure of a material feeding mechanism in this application;
[0022] Figure label:
[0023] 1. Shell; 11. Receiving cavity; 12. Feed inlet; 13. Discharge outlet; 2. Main guide roller; 21. First guide plate; 3. Secondary guide roller; 31. Second guide plate; 4. Guide plate; 41. First arc surface; 42. Second arc surface. Detailed Implementation
[0024] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0028] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0029] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
[0030] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
[0031] Figure 2 An embodiment of a material feeding mechanism according to this application is shown; see [link to relevant documentation]. Figure 2In this embodiment, the material feeding mechanism includes: a housing 1, a main guide roller 2, a secondary guide roller 3, and a guide plate 4.
[0032] Among them, see Figure 2 The housing 1 forms a receiving cavity 11. A main guide roller 2 and a secondary guide roller 3 are arranged parallel to each other within the receiving cavity 11. The main guide roller 2 is configured to rotate in a first direction, and the secondary guide roller 3 is configured to rotate in a second direction opposite to the first direction. One end of a guide block is fixed to the inner wall of the receiving cavity 11 and located downstream of the rotation tangent of the main guide roller 2. The other end extends between the main guide roller 2 and the secondary guide roller 3 to prevent material from entering the conveying dead zone area formed between the secondary guide roller 3 and the inner wall of the receiving cavity 11. Through the reverse rotation design of the main guide roller 2 and the secondary guide roller 3, the material feeding direction of the secondary guide roller 3 is consistent with the natural falling trajectory of the material, completely eliminating the material reverse pushing conflict caused by rotation in the same direction. Combined with the suspended extension structure of the guide block, the material is guided to seamlessly transition from the main guide roller 2 to above the secondary guide roller 3, completely avoiding the accumulation dead zone between the main and secondary rollers, and fundamentally solving the problems of production interruption, equipment overload, and high maintenance costs caused by material blockage.
[0033] It should be noted that in actual production, the first-cured tobacco stems are usually fed into the receiving cavity 11 of the unloading mechanism through a feeding pipe by a pneumatic conveying system. In order to maintain the airflow intensity and negative pressure balance required for pneumatic conveying and to prevent airflow short-circuiting, the unloading port 13 needs to be designed to be relatively narrow. However, when the material flow rate is large, if it relies solely on gravity to fall, the tobacco stems are prone to disorderly suspension or accumulation in the receiving cavity 11 due to wind pressure fluctuations or material characteristics, which in turn hinders smooth discharge. To solve this problem, the existing technology adopts a double-roller structure with one large and one small (main guide roller 2 and auxiliary guide roller 3). The main feed roller 2 (large roller), with its larger diameter and linear velocity, can powerfully disperse and throw a large amount of tobacco stems, effectively preventing them from accumulating in the upper part of the cavity, especially below the feed inlet 12. The auxiliary guide roller 3 (small roller), located below the main feed roller 2 and above the discharge port 13, is better suited to the narrow discharge port 13 area due to its relatively smaller size. By receiving and sorting the tobacco stem flow from the main feed roller 2, it evenly and controllably guides it to the narrow discharge port 13, ensuring that the tobacco stems overcome the influence of wind and flow out stably and evenly to the lower side of the shell 1 for subsequent processes. This synergistic effect of the large and small rollers is the key to maintaining the stable operation of the high-pressure system and avoiding material accumulation in the cavity under the narrow discharge port 13 conditions.
[0034] Optionally, the first direction is the direction in which the main guide roller 2 rotates clockwise around its own axis, and the second direction is the direction in which the auxiliary guide roller 3 rotates counterclockwise around its own axis.
[0035] Further, see Figure 2The guide block has a first arc surface 41 with its concave surface facing the main guide roller 2 and a second arc surface 42 with its concave surface facing the auxiliary guide roller 3 on its upper and lower sides, respectively. The first arc surface 41 and the second arc surface 42 move closer to each other from the fixed end to the extended end of the guide block. By setting the first arc surface 41 and the second arc surface 42 with their concave surfaces facing the main guide roller 2 and the auxiliary guide roller 3, respectively, the guide block can conform to and guide the movement trajectory of the material, ensuring its smooth and efficient transfer from the main guide roller 2 to the auxiliary guide roller 3, and effectively avoiding collisions, rebounds, jamming, or the formation of new secondary accumulations of material at the guide block.
[0036] Further, see Figure 2 The housing 1 has a feed inlet 12 at the top, located upstream of the main guide roller 2 in the direction of rotation; and a discharge outlet 13 at the bottom, facing the auxiliary guide roller 3. By positioning the feed inlet 12 upstream of the main guide roller 2 and the discharge outlet 13 facing the auxiliary guide roller 3, this structure ensures that the material is effectively received and initially dispersed by the main guide roller 2. At the same time, it makes the reverse rotation direction of the auxiliary guide roller 3 highly coordinated with the position of the discharge outlet 13, maximizing the material flow efficiency and fundamentally eliminating the contradiction in the direction of material movement and the risk of stagnation in the area of the auxiliary guide roller 3.
[0037] Furthermore, participate Figure 2 Multiple first material-pushing plates 21 are vertically fixed to the circumferential surface of the main guide roller 2. The first material-pushing plates 21 are arranged in a ring around the axis of the main guide roller 2 and extend along its axial direction to form multiple rows of material-pushing units. Multiple second material-pushing plates 31 are vertically fixed to the circumferential surface of the auxiliary guide roller 3. The second material-pushing plates 31 are arranged in a ring around the axis of the auxiliary guide roller 3 and extend along its axial direction to form multiple rows of material-pushing units. By arranging multiple rows of material-pushing plates in a ring around the main and auxiliary guide rollers 3 and extending axially, this structure significantly increases the contact area and range of action between the guide rollers and the material, realizing the full agitation and dispersion of the material in the entire width direction of the receiving cavity 11, effectively preventing local accumulation, and ensuring that the final material flows out uniformly and stably from the discharge port 13.
[0038] Furthermore, the minimum gap between the outer edge of the first feeding plate 21 and the inner wall of the receiving cavity 11 is less than or equal to the minimum size of the preset material; the minimum gap between the outer edge of the second feeding plate 31 and the inner wall of the receiving cavity 11 is less than or equal to the minimum size of the preset material. By limiting the minimum gap between the outer edges of the feeding plates of the main and auxiliary guide rollers 3 and the inner wall of the receiving cavity 11 to be less than or equal to the minimum size of the preset material, this structure physically blocks the possibility of material (especially small fragments) entering the gap between the roller and the side wall, effectively preventing the material from being ground and aged in this area.
[0039] Furthermore, the maximum distance between the outer edges of two adjacent first feeding plates 21 is less than the height of the feed inlet 12. By limiting the maximum distance between the outer edges of adjacent first feeding plates 21 to be less than the width of the feed inlet 12, this structure ensures that during the rotation of the main feed roller 2, at least one first feeding plate 21 is always located below the feed inlet 12 or promptly receives its material, effectively preventing the material from falling directly into the bottom of the receiving cavity 11 during the alternating gaps between the feeding plates, thereby avoiding uneven material dropping, local accumulation, or equipment disturbance caused by this.
[0040] Furthermore, the material feeding mechanism also includes a driving device, which is connected to the main guide roller 2 and the auxiliary guide roller 3 through a reverse transmission mechanism, driving them to rotate in opposite directions.
[0041] Optionally, the drive unit can use a single motor in conjunction with a reverse transmission mechanism to achieve reverse rotation of the two rollers. Preferred solutions: 1) Gear meshing: The motor drives the main gear through a chain, which meshes with the secondary gear to cause the secondary guide roller 3 to rotate in the opposite direction; 2) Sprocket and chain: The motor drives the sprocket, and the chain connects the two roller shaft end sprockets in an "∞" shape or with idlers, forcing them to rotate in the opposite direction; 3) Synchronous belt drive; 4) Dual motors independently drive and control the reverse rotation. Core principle: Ensure that the main and secondary guide rollers 3 rotate strictly synchronously and in opposite directions.
[0042] Example: Working principle of the material feeding mechanism:
[0043] The tobacco stems fall into the receiving cavity 11 through the feed inlet 12. The first deflector plate 21 of the main feed roller 2 (rotating clockwise) receives the material and, after circumferentially deflecting and dispersing it, throws it off the roller surface along the tangential direction of rotation. The guide block, with its first arc surface 41, receives the scattered material and guides it downwards. The material falls into the working area of the auxiliary guide roller 3. At this time, the second deflector plate 31 of the auxiliary guide roller 3 (rotating counterclockwise) deflects the material along its rotation direction (left side upwards, right side downwards), conveying it to the lower right. Since the discharge port 13 is located directly below the right side of the auxiliary guide roller 3, the material is directly deflected into the discharge port 13 and flows out of the housing 1. The guide block simultaneously prevents the material from entering the dead corner of the left side wall of the auxiliary guide roller 3. Multiple rows of deflector plates ensure uniform axial treatment, and the minimal gaps prevent material from jamming the roller wall, achieving continuous and uniform material discharge.
[0044] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by this application; the dimensions of the drawings are not related to the specific physical object, and the physical object dimensions can be arbitrarily changed.
Claims
1. A material feeding mechanism, characterized in that, include: The shell (1) has an internal cavity (11) formed inside; A main guide roller (2) and a secondary guide roller (3) are arranged vertically and parallel to each other in the receiving cavity (11), wherein the main guide roller (2) is configured to rotate in a first direction and the secondary guide roller (3) is configured to rotate in a second direction opposite to the first direction; The guide block has one end fixed to the inner wall of the receiving cavity (11) and located downstream of the rotation tangent of the main guide roller (2), and the other end extends between the main guide roller (2) and the auxiliary guide roller (3) to prevent material from entering the conveying dead zone area formed between the auxiliary guide roller (3) and the inner wall of the receiving cavity (11).
2. The material feeding mechanism according to claim 1, characterized in that, The upper and lower sides of the guide block are respectively provided with a first arc surface (41) with a concave surface facing the main guide roller (2) and a second arc surface (42) with a concave surface facing the auxiliary guide roller (3). The first arc surface (41) and the second arc surface (42) approach each other from the fixed end to the extended end of the guide block.
3. The material feeding mechanism according to claim 2, characterized in that, The top of the housing (1) is provided with a feed inlet (12), which is located upstream of the rotation tangent of the main guide roller (2); the bottom of the housing (1) is provided with a discharge port (13), which is positioned directly opposite the auxiliary guide roller (3).
4. The material feeding mechanism according to claim 3, characterized in that, The circumferential surface of the main guide roller (2) is vertically fixed with a plurality of first material-pushing plates (21). The first material-pushing plates (21) are arranged in a ring around the axis of the main guide roller (2) and extend along its axial direction to form multiple rows of material-pushing units. The circumferential surface of the auxiliary guide roller (3) is vertically fixed with a plurality of second material-pushing plates (31). The second material-pushing plates (31) are arranged in a ring around the axis of the auxiliary guide roller (3) and extend along its axial direction to form multiple rows of material-pushing units.
5. The material feeding mechanism according to claim 4, characterized in that, The minimum gap between the outer edge of the first feeding plate (21) and the inner wall of the receiving cavity (11) is less than or equal to the minimum size of the preset material; the minimum gap between the outer edge of the second feeding plate (31) and the inner wall of the receiving cavity (11) is less than or equal to the minimum size of the preset material.
6. The material feeding mechanism according to claim 5, characterized in that, The maximum distance between the outer edges of two adjacent first feeding plates (21) is less than the height of the feed inlet (12) to prevent the material from falling directly into the bottom of the receiving cavity (11) when any first feeding plate (21) rotates away from the feed inlet (12).
7. The material feeding mechanism according to any one of claims 1-6, characterized in that, It also includes a drive device, which connects the main guide roller (2) and the auxiliary guide roller (3) through a reverse transmission mechanism to drive them to rotate in opposite directions.