Rubber-coated rice milling rollers and rice milling machines

Abstract

This utility model discloses a rubber-coated rice milling roller and a rice milling machine, belonging to the technical field of rice milling machines, and is mainly used for rice milling and dehulling. The technical problem to be solved by this utility model is to provide a rubber-coated rice milling roller, including a belt connecting section, a bearing mounting section, a spiral conveying section, and a rice milling section; the rice milling section includes a core rod connected to the spiral conveying section, with a rubber sleeve covering the outer side of the core rod. The core rod has at least two protrusions arranged along its length direction, evenly distributed around the core rod; the inner side of the rubber sleeve has grooves adapted to the protrusions, and the outer side of the rubber sleeve has rice milling protrusions corresponding to the grooves and extending away from the core rod, arranged along the length direction of the core rod on the rubber sleeve; a rice milling machine using this rubber-coated rice milling roller is also provided; using this rubber-coated rice milling roller and rice milling machine for rice milling and dehulling provides both the rigidity of the core rod and the toughness of the rubber sleeve, adapting to the dehulling of grains of different shapes and sizes, ensuring dehulling or whitening effects, and reducing the broken rice rate.

Description

Technical Field

[0001] This utility model relates to the field of rice milling machine technology, and in particular to a rubber-coated rice milling roller and a rice milling machine. Background Technology

[0002] Existing rice milling machines, such as the rice polishing machine disclosed in Chinese patent document CN206295990U, and which is attached to the specification... Figure 7 The rice milling machine is shown to have a rice roller structure, which is made of alloy steel and subjected to high-frequency quenching or made of white cast iron.

[0003] For example, Chinese patent document CN209005805U discloses a rice milling machine, which includes a frame, a drive motor, a feeding hopper, a rice milling device, a negative pressure suction and bran removal device, a precision adjustment device, and an air separation device. The rice milling device includes a feeding bearing body, a rice milling chamber, a rice sieve, a positioning bushing, and a rice milling roller. The feeding bearing body is fixed above the negative pressure suction and bran removal device. One end of the rice milling chamber is fixedly connected to the feeding bearing body, and the other end is fixedly connected to the precision adjustment device. The rice sieve is fixed inside the rice milling chamber. The rice milling roller is installed in the feeding bearing body through the positioning bushing and a bearing. One end of the rice milling roller is located inside the rice sieve, and the other end is connected to the drive motor through a belt. The feeding hopper is fixed on the feeding bearing body. The suction head of the negative pressure suction and bran removal device is connected to the lower part of the rice milling chamber. Figure 23 of the specification shows the structure of the rice milling roller used in this rice milling machine, including an integrally formed belt connecting section, a bearing mounting section, a spiral conveying section, and a rice milling section to ensure the stability and durability of the structure.

[0004] However, in actual use, it was found that because the rice milling roller is rigid, it cannot adapt well to the differences in shape and size of different grains when crushing them. This can easily lead to excessive compression or improper stress on the grains, thus increasing the broken rice rate. If a rubber roller is used as the rice milling roller, since the surface of the rubber roller has no abrasive blades or ribs, it cannot effectively remove the bran of the rice through grinding (such as sanding rollers) or friction (such as iron rollers). Usually, two sets of rubber rollers with opposite rotation speeds are used to squeeze, rub, and tear the rice to remove the husk. If the difference in linear speed of the rubber rollers or the roller gap is not properly controlled, such as if it is too large, it may lead to an increase in the broken rice rate due to excessive crushing of the rice grains. If it is too small, it will lead to a decrease in dehulling or whitening efficiency, which cannot meet the existing output requirements. Moreover, the rubber rollers are more likely to be damaged, and the entire rice milling roller needs to be disassembled and reassembled. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a rubber-coated rice milling roller and a rice milling machine, which are mainly used for rice dehulling, so as to adapt to the dehulling of grains of different shapes and sizes, reduce the broken rice rate, and increase the rice yield.

[0006] This utility model discloses a rubber-coated rice milling roller, comprising a belt connecting section, a bearing mounting section, a spiral conveying section, and a rice milling section connected in sequence; the rice milling section includes a core rod connected to the spiral conveying section, the outer side of the core rod is fitted with a rubber sleeve, the core rod has protrusions arranged along the length direction of the core rod, at least two of the protrusions are evenly distributed around the circumference of the core rod; the inner side of the rubber sleeve has grooves adapted to the protrusions, and the outer side of the rubber sleeve has rice milling protrusions corresponding to the grooves and extending away from the core rod, the rice milling protrusions are arranged on the rubber sleeve along the length direction of the core rod.

[0007] Furthermore, the sleeve is made of rubber, and the core rod is made of alloy steel.

[0008] Furthermore, the belt connecting section, bearing mounting section, and screw conveyor section are integrally formed from alloy steel, and the rice milling section is threadedly connected to the screw conveyor section.

[0009] As a preferred embodiment, the spiral conveying section has an extension section at one end near the rice milling section, the extension section has threads, and the mandrel has a threaded hole at one end near the spiral conveying section that matches the threads of the extension section.

[0010] Furthermore, the thickness of the rubber sleeve is 2.5-7mm.

[0011] This utility model also discloses a rice milling machine, including a belt drive mechanism, a precision adjustment device, and a rice milling device mounted on the rice milling machine frame. The rice milling device includes a feeding bearing body, a rice milling chamber, a rice sieve, a positioning bushing, and a rubber-coated rice milling roller as described above. One end of the rice milling chamber is fixedly connected to the feeding bearing body, and the other end is fixedly connected to the precision adjustment device. The rice sieve is fixedly mounted inside the rice milling chamber. The belt connecting section is connected to the belt drive mechanism via a bearing. The bearing mounting section is mounted inside the feeding bearing body via a bearing and a positioning bushing. The top of the feeding bearing body is connected to a feeding hopper. The spiral conveying section is located inside the feeding bearing body and below the feeding hopper. The rice milling section is located inside the rice sieve.

[0012] The beneficial effects of this invention are as follows: The core rod serves as a rigid support for the rubber sleeve, ensuring the hardness of the rice milling section during the rice milling and dehulling process. By setting grooves corresponding to the raised parts and rice milling protrusions corresponding to the grooves on the rubber sleeve, the grooves and protrusions can be directly aligned and fitted onto the core rod when the rubber sleeve is fitted. This achieves both positioning and fitting between the rubber sleeve and the core rod, and ensures the connection stability between them. Furthermore, because the rice milling protrusions correspond to the grooves, the raised parts of the core rod support the rice milling protrusions on the rubber sleeve, ensuring the hardness of the rice milling protrusions and guaranteeing the dehulling or whitening effect on the grains. Thus, this rubber-coated rice milling roller possesses both the rigidity of the core rod and the toughness of the rubber sleeve, adapting to the dehulling of grains of different shapes and sizes while ensuring the dehulling or whitening effect and reducing the broken rice rate. Attached Figure Description

[0013] Figure 1 Schematic diagram of the structure of a rubber-coated rice milling roller;

[0014] Figure 2 : A schematic diagram of the structure of a rice milling segment;

[0015] Figure 3 : Figure 2 Sectional view of AA;

[0016] Figure 4 : Figure 2 BB section view;

[0017] Figure 5 Schematic diagram of the structure of the belt connection section, bearing mounting section, and screw conveyor section;

[0018] Figure 6 : A schematic diagram of the layout structure of the belt drive mechanism, precision adjustment device, and rice milling device on the rice milling machine;

[0019] Figure 7 : Schematic diagram of the rice sieve setup in a rice milling device;

[0020] Figure 8 : A schematic diagram of the structure of the rubber-coated rice milling roller installed in the rice milling device;

[0021] Reference numerals: 1- Rubber-coated rice milling roller; 11- Belt connecting section; 12- Bearing mounting section; 13- Screw conveyor section; 131- Extension section; 14- Rice milling section; 141- Core rod; 1411- Threaded hole; 142- Protrusion; 143- Rubber sleeve; 144- Groove; 145- Rice milling protrusion; 2- Belt pulley drive mechanism; 3- Precision adjustment device; 4- Rice milling device; 41- Feed bearing body; 411- Positioning bushing; 412- Bearing; 42- Rice milling chamber; 421- Rice sieve; 5- Feed hopper. Detailed Implementation

[0022] The present invention will be further described below.

[0023] This utility model provides a rubber-coated rice milling roller, mainly used for rice milling and hulling. It includes a belt connecting section 11, a bearing mounting section 12, a screw conveyor section 13, and a rice milling section 14 connected in sequence. The rice milling section 14 includes a core rod 141 connected to the screw conveyor section 13. A rubber sleeve 143 is fitted on the outer side of the core rod 141. The core rod 141 has protrusions 142 arranged along the length direction of the core rod 141. There are at least two protrusions 142, which are evenly distributed around the circumference of the core rod 141. The inner side of the rubber sleeve 143 has a groove 144 that matches the protrusions 142. The outer side of the rubber sleeve 143 has rice milling protrusions 145 that correspond to the grooves 144 and extend outward in the direction away from the core rod 141. The rice milling protrusions 145 are arranged on the rubber sleeve 143 along the length direction of the core rod 141.

[0024] like Figures 1-5As shown, the rice milling section 14 includes a core rod 141 connected to the screw conveyor section 13. A rubber sleeve 143 is fitted over the outer side of the core rod 141. The rubber sleeve 143 is made of a material with a certain elasticity and hardness, such as rubber or silicone. The core rod 141 has at least two protrusions 142 arranged along its length, evenly distributed around the circumference of the core rod 141. These protrusions 142 are adapted to fit into grooves 144 on the inner side of the rubber sleeve 143. When fitting the rubber sleeve 143 onto the core rod 141, the protrusions 142 are aligned with the grooves 144, and then the rubber sleeve 143 is fitted over the outer side of the core rod 141 to ensure the rubber sleeve fits snugly. The tight connection between the sleeve 143 and the core rod 141 ensures that slippage will not occur when rice is milled using the rice milling section 14. A rice milling protrusion 145 is provided on the outer side of the sleeve 143, corresponding to the groove 144 and extending outward in the direction away from the core rod 141. The rice milling protrusion 145 is provided on the sleeve 143 along the length direction of the core rod 141. By providing the rice milling protrusion 145 on the outer side of the sleeve 143, the bran layer of brown rice can be effectively removed. To ensure the hardness of the rice milling protrusion 145, the rice milling protrusion 145 is provided at a position corresponding to the groove 144, that is, at a position corresponding to the protrusion 142, thereby ensuring the effect of dehulling the grain. The core rod 141 serves as a rigid support for the sleeve 143, ensuring the hardness of the rice milling section 14 during the rice milling and hulling process. By providing grooves 144 corresponding to the protrusions 142 and rice milling protrusions 145 corresponding to the grooves 144 on the sleeve 143, when fitting the sleeve 143 onto the core rod 141, the grooves 144 and protrusions 142 can be directly aligned and fitted. This achieves both proper positioning of the sleeve 143 and the core rod 141 and ensures the proper fit between the sleeve 143 and the core rod 141. The connection stability between the rods 141 is ensured, and because the rice milling protrusions 145 and the grooves 144 are correspondingly arranged, the protrusions 142 of the core rod 141 support the rice milling protrusions 145 on the rubber sleeve 143, ensuring the hardness of the rice milling protrusions 145 and ensuring the dehulling or whitening effect on the grains; thus, the rubber-coated rice milling roller has both the rigidity of the core rod 141 and the toughness of the rubber sleeve 143, adapting to the dehulling of grains of different shapes and sizes while ensuring the dehulling or whitening effect and reducing the broken rice rate.

[0025] The aforementioned rubber sleeve 143 can be made of materials such as rubber or silicone that have both elasticity and a certain degree of hardness. To ensure the rigidity and flexibility of the rice milling segment 14, so that it can not only meet the requirements of grain dehulling but also adapt to the processing of grains of different sizes, the rubber sleeve 143 is made of rubber, and the core rod 141 is made of alloy steel. The core rod 141 made of alloy steel can ensure the overall strength of the rice milling segment 14 to support the rubber sleeve 143 covering the outside of the core rod 141, ensuring the dehulling or whitening effect of the grains. The rubber sleeve 143 made of rubber is fitted on the outside of the core rod 141 and has a certain degree of flexibility, which can adapt to the shape of grains of different sizes and reduce the broken rice rate.

[0026] Because the rubber sleeve 143 is made of rubber, it is inevitable that stones or metal particles will get mixed in when it is used for grain hulling, causing damage to the rubber sleeve 143 and affecting the hulling or whitening efficiency of the rubber-coated rice milling roller. It needs to be replaced. However, replacing the entire rubber-coated rice milling roller requires disassembling and assembling too many parts. To save disassembly and assembly time and facilitate the replacement of the damaged rubber sleeve 143 or the rice milling section 14, such as... Figure 1 , Figure 4 As shown, the belt connecting section 11, bearing mounting section 12, and screw conveyor section 13 are integrally formed from alloy steel. The rice milling section 14 is threadedly connected to the screw conveyor section 13. By threading the rice milling section 14 to the screw conveyor section 13, when the rice milling section 14 needs to be replaced, it can be simply removed from the rice milling machine for replacement, without having to disassemble the belt connecting section 11, bearing mounting section 12, and screw conveyor section 13 from the rice milling machine, thus improving replacement efficiency and reducing downtime. Furthermore, different sizes of rice milling sections 14 can be selected for hulling according to different sizes of grains to be hulled. Simultaneously, the threaded connection between the rice milling section 14 and the screw conveyor section 13 can stably transmit torque and prevent loosening. As a preferred embodiment, the threaded connection structure between the rice milling section 14 and the screw conveyor section 13 is as follows: Figure 3 , Figure 4 As shown, the spiral conveyor section 13 has an extension section 131 at one end near the rice milling section 14. The extension section 131 has threads, and the mandrel 141 has a threaded hole 1411 at one end near the spiral conveyor section 13 that matches the threads of the extension section 131. The threaded extension section 131 on the spiral conveyor section 13 ensures that the installed spiral conveyor section 13 is not affected when the rice milling section 14 is disassembled; the rice milling section 14 can be removed simply by screwing it off. Furthermore, when the threads on the extension section 131 and the threaded hole 1411 on the inner side of the mandrel 141 are manufactured in a standardized manner, the same spiral conveyor section 13 can be assembled with rice milling sections 14 of different sizes, making it suitable for dehulling different grains.

[0027] The rice milling efficiency of the rubber-coated rice milling roller is also related to the thickness and hardness of the rubber sleeve 143. If the hardness of the rubber sleeve 143 is too high, the broken rice rate will increase. If the hardness of the rubber sleeve 143 is too low, the dehulling or whitening efficiency will decrease. Through multiple experiments, it was found that when rubber is used as the rubber sleeve 143 and is placed on the outside of the core rod 141, the thickness of the rubber sleeve 143 is 2.5-7mm and the hardness of the rubber sleeve 143 is 50-90. This hardness refers to Shore A hardness. At this time, the dehulling or whitening efficiency of the rubber-coated rice milling roller is the highest and the broken rice rate is the lowest.

[0028] This utility model also provides a rice milling machine, such as Figures 6-8As shown, the rice milling machine includes a belt pulley transmission mechanism 2, a precision adjustment device 3, and a rice milling device 4 mounted on the frame. The rice milling device 4 includes a feed bearing 412 body 41, a rice milling chamber 42, a rice sieve 421, a positioning bushing 411, and a rubber-coated rice milling roller as described above. One end of the rice milling chamber 42 is fixedly connected to the feed bearing 412 body 41, and the other end is fixedly connected to the precision adjustment device 3. The rice sieve 421 is fixedly installed inside the rice milling chamber 42. The belt connecting section 11 is connected to the belt pulley transmission mechanism 2 via the bearing 412. The bearing mounting section 12 is installed inside the feed bearing body 41 via the bearing 412 and the positioning bushing 411. The top of the feed bearing body 41 is connected to a feed hopper 5. The screw conveyor section 13 is located inside the feed bearing body 41 and below the feed hopper 5. The rice milling section 14 is located inside the rice sieve 421. The rice milling device 4 uses the rubber-coated roller described above. The rice roller, acting as a rice milling roller, utilizes the core rod 141 as a rigid support for the rubber sleeve 143, ensuring the hardness of the rice milling section 14 during the rice milling and dehulling process. By setting grooves 144 corresponding to the protrusions 142 and rice milling protrusions 145 corresponding to the grooves 144 on the rubber sleeve 143, when the rubber sleeve 143 is fitted onto the core rod 141, the grooves 144 and protrusions 142 can be directly aligned and fitted together. This achieves both positioning and fitting between the rubber sleeve 143 and the core rod 141, and ensures the connection stability between the rubber sleeve 143 and the core rod 141. Furthermore, since the rice milling protrusions 145 are correspondingly set with the grooves 144, the protrusions 142 of the core rod 141 support the rice milling protrusions 145 on the rubber sleeve 143, ensuring the hardness of the rice milling protrusions 145 and ensuring the dehulling or whitening effect on the grains. This rice milling machine can adapt to the dehulling of grains of different shapes and sizes, ensuring the dehulling or whitening effect and reducing the broken rice rate.

Claims

1. A rubber-coated rice milling roller, comprising a belt connecting section (11), a bearing mounting section (12), a screw conveyor section (13), and a rice milling section (14) connected in sequence; characterized in that: The rice milling section (14) includes a core rod (141) connected to the screw conveyor section (13). A rubber sleeve (143) is fitted on the outer side of the core rod (141). The core rod (141) has a protrusion (142) arranged along the length direction of the core rod (141). There are at least two protrusions (142) evenly distributed around the core rod (141). The inner side of the rubber sleeve (143) has a groove (144) adapted to the protrusion (142). The outer side of the rubber sleeve (143) has a rice milling protrusion (145) corresponding to the groove (144) and extending away from the core rod (141). The rice milling protrusion (145) is arranged on the rubber sleeve (143) along the length direction of the core rod (141).

2. The rubber coated rice polishing roller as set forth in claim 1, wherein: The sleeve (143) is made of rubber, and the core rod (141) is made of alloy steel.

3. The rubber coated rice milling roller as claimed in claim 1, wherein: The belt connecting section (11), bearing mounting section (12), and screw conveyor section (13) are made of alloy steel in one piece, and the rice milling section (14) is threadedly connected to the screw conveyor section (13).

4. A rubberized rice milling roller as claimed in claim 3 wherein: The spiral conveying section (13) has an extension section (131) at one end near the rice milling section (14), the extension section (131) has threads, and the mandrel (141) has a threaded hole (1411) at one end near the spiral conveying section (13) that matches the threads of the extension section (131).

5. A rubber-coated rice polishing roller according to any one of claims 2 to 4, wherein: The thickness of the rubber sleeve (143) is 2.5-7mm.

6. A rice mill comprising a pulley drive mechanism (2), a precision adjustment device (3) and a rice milling device (4) provided on a rice mill frame, characterized in that: The rice milling device (4) includes a feeding bearing body (41), a rice milling chamber (42), a rice sieve (421), a positioning bushing (411), and a rubber-coated rice milling roller as described in any one of claims 1-5. One end of the rice milling chamber (42) is fixedly connected to the feeding bearing body (41), and the other end is fixedly connected to the precision adjustment device (3). The rice sieve (421) is fixedly installed in the rice milling chamber (42). The belt connecting section (11) is connected to the belt pulley transmission mechanism (2) through the bearing (412). The bearing mounting section (12) is installed in the feeding bearing body (41) through the bearing (412) and the positioning bushing (411). The top of the feeding bearing body (41) is connected to the feeding hopper (5). The spiral conveying section (13) is located in the feeding bearing body (41) and below the feeding hopper (5). The rice milling section (14) is located in the rice sieve (421).

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