A rice huller with adjustable roller gap

Abstract

The utility model relates to rice huller technical field, concretely relates to a kind of adjustable pressure roller gap's rice huller, including base, adjusting assembly and adaptive component;Adjusting assembly, it is set in the top of the base, for adjusting the gap distance between pressure roller according to different grain types before use;Adaptive component, it is set in the top of the base, for the adaptability adjustment of pressure roller spacing in the process of use according to the different shell breaking force requirement caused by size difference between different individuals of grain to carry out. Compared with prior art, the present application solves the problem of lack of self-adaptability and insufficient uniformity of shelling in prior art.

Description

Technical Field

[0001] This utility model relates to the field of rice hulling machine technology, and in particular to a rice hulling machine with adjustable pressure roller gap. Background Technology

[0002] A rice huller is an agricultural machine used to remove the husk from grains such as rice. It typically uses two opposing rotating pressure rollers to husk the grain. Because different types of grains, and even individual grains of the same type, vary in size, a fixed roller gap can easily lead to incomplete husking or excessive breakage. Therefore, existing rice hullers are generally designed with adjustable roller spacing to adapt to different grain types and characteristics, improving husking uniformity and efficiency. However, in current technology, the roller gap adjustment mechanism is often complex to operate, lacks intuitive markings, and has low adjustment precision. Furthermore, some machines cannot adapt to differences in grain particle size in real time during use, resulting in unsatisfactory husking effects and even high grain breakage rates, affecting product quality.

[0003] In the prior art, Chinese patent document CN221772323U, concerning a rice huller with pneumatically adjustable rubber rollers, proposes adjusting the position of the rubber rollers using a pneumatic drive device and using a cylinder to push the rubber rollers to achieve controllable changes in the gap. This allows for rapid adjustment of the roller gap according to different grain varieties or processing requirements. However, in practical applications, the above technical solution lacks a real-time adaptive function for individual grain particle size differences, which may still lead to over-crushing or incomplete hulling. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a rice huller with adjustable pressure roller gap to solve the problems of lack of adaptability to grain differences and insufficient hulling uniformity in the prior art.

[0005] To achieve the above objectives, this utility model provides a rice huller with adjustable pressure roller gap, including a base, an adjustment component, and an adaptation component; the adjustment component is disposed above the base and is used to adjust the gap distance between the pressure rollers according to different grain types before use; the adaptation component is disposed above the base and is used to adaptively adjust the pressure roller gap during use according to the different shell crushing force requirements caused by the size differences between different grains.

[0006] Preferably, the adjusting assembly includes a housing, which is fixedly connected to the top of the base. A first pressure roller is rotatably mounted inside the housing, and a drive shaft is fixedly mounted inside the first pressure roller. First pulleys are fixedly mounted on both sides of the drive shaft at the outside of the housing. A belt is fitted on the first pulley, and a second pulley is fitted on the other end of the belt. A second pressure roller is fixedly mounted on the other end of the second pulley. The second pressure roller rotatably passes through the inside of the housing. A limiting ring is rotatably mounted between the second pressure roller and the second pulley. A screw is rotatably mounted on one side of the limiting ring. The screw is rotatably mounted above the base, and a handle is fixedly mounted on the side of the screw away from the limiting ring. Sliding grooves are formed on both sides of the housing at the second pressure roller.

[0007] Preferably, the adaptation component includes a plurality of telescopic rods, all of which are fixedly installed on the outside of the drive shaft. The other end of each telescopic rod is fixed to the inside of the first pressure roller. A spring is sleeved on the outside of each telescopic rod, with one end of the spring fixed to the drive shaft and the other end of the spring fixed to the first pressure roller.

[0008] Preferably, a motor protective shell is provided on one side of the base, and a motor is fixedly installed inside the motor protective shell. One side of the motor's power shaft is connected to the transmission shaft via another belt and drives the motor.

[0009] Preferably, two guide plates are fixedly installed at the feed inlet of the housing. The guide plates are inclined plate-shaped parts, with the bottom of one guide plate located above the first pressure roller and the bottom of the other guide plate located above the second pressure roller.

[0010] Preferably, the diameter of the first pulley is greater than the diameter of the second pulley, and the belt is an elastic component with deformation properties.

[0011] Preferably, a receiving block is fixedly installed on one side of the base, a pull rod is slidably installed above the receiving block, a tension wheel is rotatably installed above the pull rod, the tension wheel is located above the belt, the lower middle part of the tension wheel contacts the upper part of the belt, and multiple tension springs are fixedly installed inside the receiving block, with the top of the tension springs fixedly connected to the bottom of the pull rod.

[0012] Preferably, the screw has multiple color areas on its threaded position, with each color area corresponding to a pressure roller spacing, for use in conjunction with different types of grains.

[0013] The beneficial effects of this utility model are: 1. This rice huller with adjustable pressure roller gap allows the second pressure roller to move easily in the horizontal direction by setting an adjustment component on the rice huller and using the cooperation of a screw, handle, limit ring and sliding groove, thereby changing the gap between the first pressure roller and the second pressure roller. The color area on the screw provides intuitive markings, allowing users to quickly match the required gap. The operation is simple, and the diameter difference design between the first pulley and the second pulley makes the rotation speed of the first pressure roller higher than that of the second pressure roller, improving the hulling efficiency and uniformity.

[0014] 2. This rice huller with adjustable pressure roller gap features an adaptive component. A telescopic rod and spring are installed outside the drive shaft, allowing the first pressure roller to elastically displace when encountering grains of different sizes. This dynamic adaptation prevents excessive crushing or incomplete hulling due to grain size differences. This structure not only improves the overall uniformity of hulling but also reduces mechanical impact, extends the service life of the first pressure roller and drive shaft, and reduces equipment maintenance frequency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of part of the structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the pressure roller of this utility model; Figure 4 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This utility model Figure 3 Enlarged schematic diagram of the structure at point B; Figure 6 This utility model Figure 2 Enlarged schematic diagram of the structure at point C.

[0017] The diagram is marked as follows: 1. Motor protective shell; 2. Base; 3. Outer shell; 4. Guide plate; 5. First pressure roller; 6. Drive shaft; 7. First pulley; 8. Second pulley; 9. Belt; 10. Second pressure roller; 11. Limiting ring; 12. Screw; 13. Handle; 14. Sliding groove; 15. Telescopic rod; 16. Spring; 17. Tensioning wheel; 18. Pull rod; 19. Receiving block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 6 As shown, an adjustable pressure roller gap rice huller includes a base 2, an adjustment component, and an adaptation component. A motor protective shell 1 is provided on one side of the base 2. An electric motor is fixedly installed inside the motor protective shell 1. One side of the motor's power shaft is connected to a transmission shaft 6 via another belt 9 to transmit kinetic energy. Two guide plates 4 are fixedly installed at the feed inlet of the outer shell 3. The guide plates 4 are inclined plate-shaped parts. The bottom of one guide plate 4 is located above the first pressure roller 5, and the bottom of the other guide plate 4 is located above the second pressure roller 10. The motor protective shell 1 effectively protects the electric motor, improving safety and service life. The inclined structure of the guide plates 4 ensures that the grain enters the pressure roller area smoothly, improving processing efficiency.

[0021] Furthermore, such as Figure 1 , 2 as well as Figure 4As shown, the adjustment assembly, located above the base 2, is used to adjust the gap between the pressure rollers according to different grain types before use. It includes a housing 3, which is fixedly connected to the top of the base 2. A first pressure roller 5 is rotatably mounted inside the housing 3. A drive shaft 6 is fixedly mounted inside the first pressure roller 5. First pulleys 7 are fixedly mounted on both sides of the drive shaft 6 outside the housing 3. A belt 9 is fitted onto the first pulley 7, and a second pulley 8 is fitted onto the other end of the belt 9. A second pressure roller 10 is fixedly mounted on the other end of the second pulley 8. The second pressure roller 10 rotatably passes through the inside of the housing 3. A limit ring 11 is rotatably mounted between the second pressure roller 10 and the second pulley 8. A screw 12 is rotatably mounted on one side of the limit ring 11. The screw 12 is rotatably mounted on the bottom... Above the base 2, a handle 13 is fixedly installed on the screw 12 on the side away from the limiting ring 11. Sliding grooves 14 are provided on both sides of the outer casing 3 at the second pressure roller 10. The diameter of the first pulley 7 is greater than the diameter of the second pulley 8, meaning the rotational speed of the first pressure roller 5 is greater than the rotational speed of the second pressure roller 10. The belt 9 is an elastic part with deformation properties. Multiple color areas are provided on the threaded position of the screw 12, with each color area representing a pressure roller spacing, used to adapt to different grain types. A receiving block 19 is fixedly installed on one side of the base 2. A pull rod 18 is slidably installed above the receiving block 19. A tension wheel 17 is rotatably installed above the pull rod 18, located above the belt 9. The lower middle part of the tension wheel 17 is connected to the upper part of the belt 9. The square contact block 19 has multiple tension springs fixedly installed inside, with the top of the springs fixedly connected to the bottom of the pull rod 18. The first pressure roller 5 and the second pressure roller 10 cooperate to form a stable hulling channel, ensuring uniform processing. Power is transmitted by the belt 9. The structure is simple, easy to maintain and replace. The screw 12 and handle 13 have an intuitive structure, allowing users to quickly adjust the gap between the pressure rollers to adapt to different grain varieties. The sliding groove 14 provides stable guidance, making the second pressure roller 10 move smoothly. The diameter difference design of the first pulley 7 and the second pulley 8 allows the first pressure roller 5 to rotate at a higher speed, improving hulling efficiency. The belt 9 has elastic deformation capability, which can buffer impacts and avoid damage to parts. At the same time, it can be used with the screw 12 to adjust the position while ensuring the transmission of kinetic energy. The color area on the screw 12 is marked The design facilitates quick matching of appropriate spacing and is easy to operate. The boundary of each color area represents a type of grain. Reaching the boundary of the rotating position allows for easy identification of the grain's operating space. The introduction of the tension wheel 17 ensures stable transmission of the belt 9 during movement. Before use, the operator, depending on the type of grain to be processed, turns the handle 13, causing the screw 12 to rotate. The screw 12, fixedly connected to the limit ring 11, allows the second pressure roller 10 to move horizontally within the sliding groove 14. As the position of the second pressure roller 10 changes, the gap between the two pressure rollers (the first pressure roller 5 and the second pressure roller 10) changes accordingly. The operator can quickly determine the appropriate pressure roller spacing based on the color area markings on the screw 12. After the grain is fed in...Because the diameter of the first pulley 7 is larger than that of the second pulley 8, the rotational speed of the first pressure roller 5 is higher than that of the second pressure roller 10, generating relative friction and achieving efficient shell removal.

[0022] Furthermore, such as Figure 2 , 3 as well as Figure 5 As shown, the adaptive component, positioned above the base 2, is used to adjust the spacing of the pressure rollers according to the different crushing requirements caused by the size differences between individual grains during use. It includes multiple telescopic rods 15, all fixedly mounted on the outside of the drive shaft 6. The other end of each telescopic rod 15 is fixed to the inside of the first pressure roller 5. A spring 16 is fitted onto the outside of each telescopic rod 15. One end of the spring 16 is fixed to the drive shaft 6, and the other end is fixed to the first pressure roller 5 via welding. This structure of telescopic rods 15 and springs 16 allows for automatic adjustment to accommodate grains of different sizes, preventing over-crushing or incomplete hulling and improving the hulling efficiency. To ensure overall uniformity and reduce losses due to differences in grain size, spring 16 provides elastic cushioning, reduces mechanical impact, and extends the service life of the first pressure roller 5 and the drive shaft 6. When the rice huller is running, the grain enters between the first pressure roller 5 and the second pressure roller 10. When encountering larger grains, the first pressure roller 5 will undergo slight displacement under the action of the telescopic rod 15 and the spring 16. The telescopic rod 15 extends and retracts, and the spring 16 deforms, providing a buffer space and temporarily increasing the gap between the pressure rollers to prevent the grains from being over-compressed. After the grains pass through, the spring 16 springs back to its original position, and the first pressure roller 5 returns to its original position, maintaining a normal gap. Throughout the process, the gap between the pressure rollers can be adaptively adjusted according to the individual differences in the grains.

[0023] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0024] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rice huller with adjustable pressure roller gap, characterized in that, include: Base (2), adjustment components and adaptation components; An adjustment component, located above the base (2), is used to adjust the gap between the pressure rollers according to different grain types before use; an adaptation component, located above the base (2), is used to adaptively adjust the gap between the pressure rollers according to the different requirements for shell crushing force caused by the size differences between different grains during use; the adjustment component includes a shell (3), which is fixedly connected above the base (2). A first pressure roller (5) is rotatably installed inside the shell (3). A drive shaft (6) is fixedly installed inside the first pressure roller (5). A first pulley (7) is fixedly installed on both sides of the drive shaft (6) on the outside of the shell (3). A belt (9) is sleeved on the first pulley (7). A second pulley (8) is sleeved on the other end of the belt (9). A second pressure roller (10) is fixedly installed on the other end of the second pulley (8). The second pressure roller (10) rotates. Inside the outer shell (3), a limiting ring (11) is rotatably installed between the second pressure roller (10) and the second pulley (8). A screw (12) is rotatably installed on one side of the limiting ring (11). The screw (12) is rotatably installed above the base (2). A handle (13) is fixedly installed on the side of the screw (12) away from the limiting ring (11). Sliding grooves (14) are opened on both sides of the outer shell (3) at the second pressure roller (10). The adaptation component includes multiple telescopic rods (15). The multiple telescopic rods (15) are fixedly installed on the outside of the drive shaft (6). The other end of the telescopic rod (15) is fixed to the inside of the first pressure roller (5). A spring (16) is sleeved on the outside of the telescopic rod (15). One end of the spring (16) is fixed to the drive shaft (6), and the other end of the spring (16) is fixed to the first pressure roller (5).

2. A rice huller with adjustable pressure roller gap according to claim 1, characterized in that, A motor protective shell (1) is provided on one side of the base (2). An electric motor is fixedly installed inside the motor protective shell (1). The power shaft of the electric motor is connected to the transmission shaft (6) via another belt (9) and drives the motor.

3. A rice huller with adjustable pressure roller gap according to claim 1, characterized in that, Two guide plates (4) are fixedly installed at the feed inlet of the outer shell (3). The guide plate (4) is an inclined plate-shaped part. The bottom of one guide plate (4) is located above the first pressure roller (5), and the bottom of the other guide plate (4) is located above the second pressure roller (10).

4. A rice huller with adjustable pressure roller gap according to claim 1, characterized in that, The diameter of the first pulley (7) is greater than the diameter of the second pulley (8), and the belt (9) is an elastic part with deformation properties.

5. A rice huller with adjustable pressure roller gap according to claim 1, characterized in that, A receiving block (19) is fixedly installed on one side of the base (2). A pull rod (18) is slidably installed above the receiving block (19). A tension wheel (17) is rotatably installed above the pull rod (18). The tension wheel (17) is located above the belt (9). The lower middle part of the tension wheel (17) is in contact with the upper part of the belt (9). Multiple tension springs are fixedly installed inside the receiving block (19). The top of the tension springs is fixedly connected to the bottom of the pull rod (18).

6. A rice huller with adjustable pressure roller gap according to claim 1, characterized in that, The screw (12) has multiple color areas on its threaded position. Each color area corresponds to a pressure roller spacing, which is used to adapt to different types of grains for use.

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