A rice hulling machine

Abstract

This utility model discloses a rice hulling machine, comprising a body with a feeding port at the top, a control knob and control panel on one side, and a discharge port on the other side. Below the feeding port inside the body is a material equalization component, and below the equalization component is a first flow channel. One end of the first flow channel is connected to a roller assembly, and one end of the roller assembly has a second flow channel and an air duct. The second flow channel communicates with the discharge port, and the air duct communicates with a recovery trough. A soft rubber sleeve is mounted on the roller assembly; the soft rubber sleeve is detachable, and friction protrusions are evenly distributed on its outer surface. This utility model, by using a soft rubber sleeve with friction protrusions on the roller assembly, utilizes the friction between the friction protrusions and the rice to achieve hulling. While ensuring hulling efficiency, it reduces equipment cost and overall structural complexity, effectively reduces rice grain breakage, and lowers the probability of rice bran contamination.

Description

Technical Field

[0001] This utility model belongs to the technical field of rice processing equipment, and specifically relates to a rice hulling machine. Background Technology

[0002] Currently, the most common rice hulling machines are roller type, disc type, and centrifugal type. Among them, roller type hulling utilizes the principle of friction hulling, which is also one of the most commonly used hulling methods. Specifically, after the rice enters the hulling machine, its outer hard shell is worn away by the friction of the high-speed rotating rollers, thus separating the rice grains. The advantage of friction hulling is its high hulling efficiency, but it also has some drawbacks, such as easily leading to problems like bran mixing and rice grain breakage.

[0003] In existing equipment, to address the aforementioned technical issues, the friction walls of the rollers are typically made of plastic to prevent rice bran breakage. However, due to the reduced roller hardness, to ensure hulling efficiency, the equipment employs a multi-stage roller structure, utilizing the speed difference between two rollers to achieve a "twisting" effect to separate the husks. This approach undoubtedly increases equipment cost and overall structural complexity, hindering maintenance and long-term use, and is unsuitable for home and agricultural use.

[0004] Therefore, improving the roller structure to reduce the complexity of the equipment while ensuring efficient rice bran dehulling is a technical problem that urgently needs to be solved.

[0005] Therefore, a rice hulling machine is provided. Utility Model Content

[0006] The purpose of this invention is to provide a rice hulling machine that solves the problems mentioned in the background art by incorporating a soft rubber sleeve with a specific structure on the roller assembly. The specific technical solution is as follows:

[0007] A rice hulling machine includes a body with a feeding port at the top, a control knob and control panel on one side, and a discharge port on the other side. A material equalization component is located below the feeding port inside the body. A first flow channel is located below the material equalization component, with one end of the first flow channel connected to a roller assembly. A second flow channel and an air duct are located at one end of the roller assembly. The second flow channel communicates with the discharge port, and the air duct communicates with a recovery trough. A soft rubber sleeve is provided on the roller assembly. The soft rubber sleeve is detachable, and friction protrusions are evenly distributed on its outer surface.

[0008] Preferably, the friction protrusion has a raised structure and is higher than the outer surface of the soft rubber sleeve.

[0009] Preferably, the friction protrusion is made of a flexible material, the friction protrusion is made of the same material as the soft rubber sleeve, and the friction protrusion is integrally formed with the soft rubber sleeve.

[0010] Preferably, the friction protrusion is configured as a V-shaped protrusion, and multiple V-shaped protrusions are closely arranged on the soft rubber sleeve, with each V-shaped protrusion evenly spaced from each other.

[0011] Preferably, the friction protrusion is configured as an L-shaped protrusion, and multiple L-shaped protrusions are closely arranged on the soft rubber sleeve, with each L-shaped protrusion evenly spaced from each other.

[0012] Preferably, the bottom of the soft rubber sleeve is provided with a plurality of plug-in blocks, each of the plug-in blocks being arranged in a circular shape, and the roller assembly is provided with a plurality of plug-in slots that are mutually plugged and engaged with the plug-in blocks.

[0013] Preferably, each of the plug-in blocks and plug-in slots are tightly plugged into each other.

[0014] Preferably, the plug-in block is made of a different material than the soft rubber sleeve, the plug-in block is made of a hard material, and the plug-in block is integrally formed with the bottom of the soft rubber sleeve.

[0015] Compared with existing technologies, this utility model has the following beneficial effects:

[0016] 1. The present invention provides a rice hulling machine, which uses a soft rubber sleeve with friction protrusions on the roller assembly to achieve hulling by utilizing the friction between the friction protrusions and the rice. While ensuring hulling efficiency, the friction protrusions are made of flexible material and are made of the same material as the soft rubber sleeve and are formed in one piece, which effectively reduces the breakage of rice grains and lowers the probability of rice bran mixing.

[0017] 2. The rice hulling machine provided by this utility model does not require the multi-stage roller structure of existing equipment. It can achieve efficient hulling by simply optimizing the structure of the roller assembly, which reduces the equipment cost and the complexity of the overall structure. It is also easier to maintain and use the equipment in the long term, making it suitable for families and farmers.

[0018] 3. The soft rubber sleeve provided by this utility model adopts a detachable installation, and is fixed by the bottom plug-in block cooperating with the plug-in groove on the roller assembly. When the soft rubber sleeve is worn, it is easy to replace, extending the service life of the equipment and reducing the operating cost. Moreover, the friction protrusions are set in V-shape or L-shape and evenly spaced, which can select the appropriate soft rubber sleeve according to the characteristics of different types of rice, further improving the hulling effect and adaptability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a front view structural diagram of this utility model.

[0022] Figure 3 This is a schematic diagram of the internal structure of the body of this utility model.

[0023] Figure 4 This is a schematic diagram of the unfolded structure of the soft rubber sleeve of this utility model, showing the planar structure of the V-shaped protrusion.

[0024] Figure 5 This is a schematic diagram of the unfolded structure of the soft rubber sleeve of this utility model, showing the planar structure of the L-shaped protrusion.

[0025] Explanation of key figure labels:

[0026] 1. Machine body; 2. Feeding port; 3. Control knob; 4. Control panel; 5. Discharge port; 6. Material equalization assembly; 7. First flow channel; 8. Roller assembly; 9. Second flow channel; 10. Air duct; 11. Recycling trough; 12. Soft rubber sleeve; 13. V-shaped protrusion; 14. L-shaped protrusion; 15. Insertion block; 16. Insertion groove. Detailed Implementation

[0027] 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.

[0028] The embodiments will be described in detail below to enable those skilled in the art to better understand the present invention:

[0029] A rice hulling machine, such as Figures 1 to 5As shown, the machine body 1 is provided. A feeding port 2 is located at the top of the machine body 1, through which the rice to be hulled enters the machine body 1 for processing. A control knob 3 and a control panel 4 are located on one side of the machine body 1 for controlling relevant operating parameters. A discharge port 5 is located on the other side of the machine body 1. Below the feeding port 2 inside the machine body 1, a material equalization component 6 is located. The material equalization component 6 adopts existing technology and specifically includes a motor, material equalization rods, etc., for uniformly conveying the rice to be hulled. Below the material equalization component 6 is a first flow channel 7, through which the rice to be hulled flows out after being conveyed by the material equalization component 6. Since the front end of the first flow channel 7 connects to a roller assembly 8, the rice to be hulled flows into the roller assembly 8 for hulling.

[0030] After dehulling, the finished rice flows into the discharge port 5 along the second flow channel 9 at the rear end of the roller assembly 8. During the outflow process, the air duct 10 at the rear end of the roller assembly 8 blows air, and the air force of the air duct 10 can be adjusted through the control panel 4. The dehulled rice bran is blown along the air duct 10 into the recycling trough 11 for collection, thus achieving rice husk separation. The principle of this technology adopts existing mature technology and will not be elaborated further here. This utility model aims to improve the structural design of the roller assembly 8 by setting a detachable soft rubber sleeve 12 on the roller assembly 8 and evenly distributing friction protrusions on the outer surface of the soft rubber sleeve 12 to ensure efficient dehulling of the rice.

[0031] Specifically, the friction protrusion is designed as a raised structure, exhibiting a distinct bulge that extends beyond the outer surface of the soft rubber sleeve 12, creating a certain height difference. This design allows the friction protrusion to be significantly higher than the plane of the soft rubber sleeve 12, thereby providing superior frictional performance during contact and improving the shell removal efficiency.

[0032] In further optimized design, to address issues such as rice grain breakage, these friction protrusions are all made of flexible material. Furthermore, these friction protrusions and the outer soft rubber sleeve 12 are made of the same material, ensuring the consistency and stability of the overall structure. Moreover, these friction protrusions and the soft rubber sleeve 12 are manufactured using a one-piece molding process. This seamless connection design enhances the overall structural integrity and avoids potential wear issues at seams, greatly improving durability.

[0033] In further optimized design, the friction protrusions can adopt two different geometric configuration schemes: The first scheme is to design the friction protrusions as V-shaped protrusions 13. This V-shaped structure has excellent guiding and frictional characteristics. They are densely arranged on the surface of the soft rubber sleeve 12, with precise equidistant spacing between multiple V-shaped protrusions 13 to ensure uniform force distribution. The second scheme is to use L-shaped protrusions 14. This right-angled structure also provides good friction. The L-shaped protrusions 14 are arranged in the same dense manner on the soft rubber sleeve 12, ensuring that the spacing between adjacent protrusions is completely consistent, thereby achieving optimal frictional performance. Both design schemes can effectively improve the performance of the soft rubber sleeve 12 and meet the needs of rice hulling of different specifications.

[0034] To effectively improve the overall stability and firmness of the soft rubber sleeve 12 during use, multiple insertion blocks 15 are specially designed and evenly arranged at the bottom of the soft rubber sleeve 12. These insertion blocks 15 are arranged in a circular ring shape, forming a complete ring array structure. Correspondingly, multiple matching insertion slots 16 are specially machined on the roller assembly 8. The position and number of these insertion slots 16 correspond perfectly to the insertion blocks 15 on the soft rubber sleeve 12, ensuring a perfect insertion fit. During actual assembly, each insertion block 15 will form a tight insertion relationship with its corresponding insertion slot 16. This fit requires not only precise dimensions but also a certain degree of tightness to ensure that it will not loosen or fall off during use. Furthermore, the insertion blocks 15 are made of a different material than the main body of the soft rubber sleeve 12, specifically a high-hardness hard material, which ensures the strength of the connection part without affecting the overall flexibility of the soft rubber sleeve 12. These plug-in blocks 15 are not components that are installed separately later, but are integrally formed with the bottom during the molding process of the soft rubber sleeve 12. This integrated structure can greatly improve the integrity and reliability.

[0035] In summary, after the paddy rice enters the machine body 1 through the feeding port 2, it first reaches the equalization component 6. Driven by a motor, the equalization component 6 evenly spreads the paddy rice through the rotation of the equalization rods and conveys it to the first flow channel 7. The paddy rice then enters the roller assembly 8 along the first flow channel 7. At this time, the roller assembly 8 rotates under the drive of the drive device, and the soft rubber sleeve 12 on the roller assembly 8 rotates with the roller. The friction protrusions on the outer surface of the soft rubber sleeve 12 contact the paddy rice and generate friction. Because the friction protrusions have a certain height and adopt a suitable shape, they can effectively wear down and peel off the paddy rice husk during the friction process. For paddy rice with a harder husk, a soft rubber sleeve 12 with V-shaped protrusions can be selected, as its guiding and frictional characteristics are more suitable for the dehulling of this type of paddy rice; for paddy rice with a softer husk, a soft rubber sleeve 12 with L-shaped protrusions can play a better role. After dehulling, the paddy rice enters the second flow channel 9 under its own gravity and the push of the roller rotation, and is finally discharged from the discharge port 5. The rice bran produced during hulling is blown towards the recycling trough 11 by the airflow from the air duct 10, thus separating the paddy rice from the bran. When the soft rubber sleeve 12 wears out after a period of use and affects the hulling effect, the soft rubber sleeve 12 can be removed from the roller assembly 8 and replaced with a new soft rubber sleeve 12. It can be reinstalled and fixed by the cooperation of the insertion block 15 and the insertion slot 16.

[0036] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A rice hulling machine, comprising a body (1), a feeding port (2) at the top of the body (1), a control knob (3) and a control panel (4) on one side of the body (1), a discharge port (5) on the other side of the body (1), a material equalization component (6) below the feeding port (2) inside the body (1), a first flow channel (7) below the material equalization component (6), a roller assembly (8) connected to one end of the first flow channel (7), a second flow channel (9) and an air duct (10) at one end of the roller assembly (8), the second flow channel (9) communicating with the discharge port (5), and the air duct (10) communicating with the recovery trough (11), characterized in that, The roller assembly (8) is provided with a soft rubber sleeve (12), which is detachable. Friction protrusions are evenly distributed on the outer surface of the soft rubber sleeve (12).

2. A rice huller as claimed in claim 1, wherein, The friction protrusion has a protruding structure and is higher than the outer surface of the soft rubber sleeve (12).

3. A rice huller as claimed in claim 2, wherein, The friction protrusion is made of a flexible material. The friction protrusion is made of the same material as the soft rubber sleeve (12). The friction protrusion is integrally formed with the soft rubber sleeve (12).

4. A rice huller as claimed in claim 3, wherein, The friction protrusion is configured as a V-shaped protrusion (13), and multiple V-shaped protrusions (13) are closely arranged on the soft rubber sleeve (12), with each V-shaped protrusion (13) evenly spaced from each other.

5. A rice huller as claimed in claim 3, wherein, The friction protrusion is configured as an L-shaped protrusion (14), and multiple L-shaped protrusions (14) are tightly arranged on the soft rubber sleeve (12), with each L-shaped protrusion (14) evenly spaced from each other.

6. A rice huller as claimed in claim 1, wherein, The bottom of the soft rubber sleeve (12) is uniformly provided with a plurality of plug-in blocks (15), each of the plug-in blocks (15) is arranged in a circular shape, and the roller assembly (8) is provided with a plurality of plug-in grooves (16) that are mutually plugged and matched with the plug-in blocks (15).

7. A rice huller as claimed in claim 6, wherein, Each of the said plug-in blocks (15) and plug-in slots (16) are tightly plugged into each other.

8. A rice huller as claimed in claim 7, wherein, The plug-in block (15) is made of a different material than the soft rubber sleeve (12). The plug-in block (15) is made of a hard material and is integrally formed with the bottom of the soft rubber sleeve (12).

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