Household rice husking machine and rice husking roller thereof

Abstract

The utility model provides a household rice husking machine and a rice husking roller thereof, aims to reduce the rice crushing rate of the household rice husking machine and improve the rice husking quality of the household rice husking machine, and relates to the technical field of rice husking machines. The rice milling roller of the household rice milling machine comprises a rice milling roller body, the rice milling roller body comprises two parts in the axial direction, one part is a feeding part, the other part is a milling part, a shaft of the feeding part is provided with a spiral feeding rib protruding out of the surface of the shaft, a shaft of the milling part is provided with at least two grinding ribs protruding out of the surface of the shaft, and the feeding part and the milling part are arranged in parallel. The spiral rib section is opposite to the feeding rib in rotating direction, one end of the linear rib section is connected with one end of the spiral rib section, the linear rib section extends in the axial direction of the rice milling roller body, the linear rib section is arranged close to the feeding portion, and the length of the linear rib section is larger than 30 mm and smaller than 50 mm. The rice husking quality of the rice husking machine is improved, and the competitiveness of the rice husking machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rice mills, in particular to a household rice mill and a rice milling roller thereof. Background Art

[0002] Freshly milled rice has higher nutritional value compared to ordinary rice sold in the market. Therefore, with the improvement of living quality, household rice mills have emerged. Compared with ordinary rice mills, household rice mills are required to have a smaller volume and a more fashionable appearance.

[0003] In order to meet the demand for miniaturization of rice mills, Chinese Patent No. CN2034007743U with the publication number discloses a rice milling roller structure of a household rice mill, which includes a roller body. One end of the roller body is connected to a driving device, and the other end is a free end. The roller body is divided into two parts along the axial direction. The part close to the driving device is a feeding part, and the part close to the free end is a grinding part. The shaft of the feeding part is provided with feeding ribs protruding from the shaft surface in a spiral shape, and the shaft of the grinding part is provided with grinding ribs protruding from the shaft surface. There are at least two grinding ribs, and at least a part of each grinding rib is a spiral rib with a spiral direction opposite to that of the feeding ribs. The spiral ribs are arranged on the grinding ribs of the rice milling roller. First, the spiral ribs enable the material (paddy) to fully tumble when advancing, so that the materials, the grinding ribs of the rice milling roller, and the materials and the rice sieve can fully rub against each other. Second, the resistance to the forward movement of the material is increased. At the same time, since the material can fully tumble, the dynamic friction time and effective friction time of the material in the grinding roller are increased. Third, since the resistance to the forward movement of the material is increased, it can play a role in stabilizing the rice output pressure. Based on these functions, the rice milling roller can be made very short to ensure complete hulling of the rice.

[0004] However, the applicant found during use that if all the grinding ribs of the above rice milling roller are spiral ribs, not only the processing cost of the grinding ribs is high, but also the broken rice rate is high. By adopting a structural form in which a part close to the feeding ribs is a straight rib and the other part is a spiral rib with a spiral direction opposite to that of the feeding ribs, not only can the processing cost of the grinding ribs be reduced, but also setting a straight rib with an appropriate length can significantly reduce the broken rice rate of the rice mill. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a household rice mill and a rice milling roller thereof, so as to reduce the broken rice rate of the household rice mill and improve the rice milling quality of the household rice mill.

[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows: The rice milling roller of a household rice milling machine includes a rice milling roller main body. The rice milling roller main body includes two parts along the axial direction, one of which is a feeding part and the other is a grinding part. On the shaft of the feeding part, there are feeding ribs protruding from the shaft surface in a spiral shape. On the shaft of the grinding part, there are at least two grinding ribs protruding from the shaft surface. The grinding ribs include a spiral rib section with a spiral direction opposite to that of the feeding ribs and a linear rib section with one end connected to one end of the spiral rib section and extending along the axial direction of the rice milling roller main body. The linear rib section is arranged close to the feeding part, and the length of the linear rib section is greater than 30 mm and less than 50 mm.

[0007] Further, the spiral angle of the spiral rib section is 45° to 60°.

[0008] Further, the length of the linear rib section is greater than the length of the spiral rib section.

[0009] Further, the ratio of the length of the linear rib section to the length of the spiral rib section is 1.4 to 1.6.

[0010] Further, the shaft diameter of the grinding part is equal to or less than the shaft diameter of the feeding part.

[0011] Further, there are two grinding ribs.

[0012] Further, the spiral pitch of the feeding ribs is greater than or equal to 10 mm.

[0013] A household rice milling machine includes a machine shell, a hopper, a motor, and a rice milling mechanism. The motor and the rice milling mechanism are both arranged inside the machine shell. The hopper is connected above the rice milling mechanism. The rice milling mechanism includes a rice milling shell, a rice sieve, and the above-mentioned rice milling roller of the household rice milling machine. One end of the feeding part of the rice milling roller is in transmission connection with the motor, and the rice sieve is sleeved on the grinding part of the rice milling roller.

[0014] Further, strip-shaped sieve holes are provided on the rice sieve, and the strip-shaped sieve holes are inclined with respect to the axial direction of the rice milling roller.

[0015] Further, along the material discharging direction, on the lower rotating side of the rice milling roller, the sieve holes are inclined downward, and on the upper rotating side of the rice milling roller, the sieve holes are inclined upward.

[0016] The beneficial effects of the present utility model are as follows: For the household rice mill and its rice milling roller of the present utility model, the length of the straight rib section 141 is set to be greater than 30 mm and less than 50 mm, so that all or most of the materials passing through the straight rib section can adjust their directions when passing through the straight rib section and become consistent with the extension direction of the straight rib section in the length direction, but it will not cause excessive grinding and broken rice due to the too long straight rib section. When the materials pass through the spiral rib section 142 for processing, the materials are not easy to break during the friction process with the rice sieve, thereby reducing the broken rice rate, improving the rice milling quality of the rice mill, and enhancing the competitiveness of the rice mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the rice milling roller of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the rice milling roller of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the household rice mill of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the rice sieve;

[0021] As shown in the figure: the rice milling roller 1, the machine shell 2, the hopper 3, the rice milling shell 4, the rice sieve 5, the material discharge direction 6, the motor 7, the rotation direction 8, the feeding part 11, the milling part 12, the feeding rib 13, the grinding rib 14, the spiral rib section 142, the straight rib section 141, and the sieve holes 51. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be further described below with reference to the drawings and embodiments.

[0023] As Figure 1 、 Figure 2 shown, the rice milling roller 1 of the household rice mill of the present utility model includes a rice milling roller main body. The rice milling roller main body includes two parts along the axial direction. One is the feeding part 11, and the other is the milling part 12. The shaft of the feeding part 11 is provided with a spiral feeding rib 13 protruding from the shaft surface, and the shaft of the milling part 12 is provided with at least two grinding ribs 14 protruding from the shaft surface. The grinding rib 14 includes a spiral rib section 142 with a spiral direction opposite to that of the feeding rib 13 and a straight rib section 141 with one end connected to one end of the spiral rib section 142 and extending along the axial direction of the rice milling roller main body. The straight rib section 141 is arranged close to the feeding part 11, and the length a of the straight rib section 141 is greater than 30 mm and less than 50 mm.

[0024] In order to ensure the strength and service life of the feeding rib 13 and the grinding rib 14, the feeding rib 13 generally adopts a trapezoidal or square cross-section, and the grinding rib 14 generally adopts a square cross-section.

[0025] In the rice milling roller of the household rice milling machine of the present utility model, the grinding ribs 14 are arranged into two parts: a straight rib section 141 and a spiral rib section 142 with a spiral direction opposite to that of the feeding rib 13. Among them, the straight rib section 141 is arranged close to the feeding part 11, and the length of the straight rib section 141 is greater than 30 mm and less than 50 mm. It not only has the advantages of the rice milling roller of the existing household rice milling machine, but also the results show that, under the same other parameters, adopting the above structure can significantly reduce the broken rice rate of the rice milling machine, at least by 5%. As Figure 3 shown, the reason is that after the material is fed into the rice milling housing 4 of the rice milling machine through the feeding rib 13, during the process of the rice milling roller 1 rotating to mill the rice, the material will first be affected by the straight rib section 141 of the milling part and move circumferentially around the center of the rice milling roller, and at the same time, the material will move gradually forward under the action of the feeding rib. During this process, the circumferential movement speed of the material will be much greater than the forward movement speed (the rotation speed of the rice milling machine is generally greater than 500 r / min). Since the straight rib section 141 extends along the axial direction of the rice milling roller main body, and the material will be affected by the frictional force of the rice sieve 5 during the circumferential movement around the center of the rice milling roller, so that the material will rotate and adjust its direction during the movement, making its length direction gradually become consistent with the extension direction of the straight rib section. Therefore, setting the length of the straight rib section 141 to be greater than 30 mm and less than 50 mm can make all or most of the materials passing through the straight rib section adjust their directions and make their length directions consistent with the extension direction of the straight rib section, but it will not cause the materials to be over-milled and broken due to the too long straight rib section. According to the rice milling principle of the rice milling machine, the gap between the rice milling roller and the rice sieve needs to be smaller than the length of the material. Therefore, after the length direction of the material is consistent with the extension direction of the straight rib section, when the material passes through the spiral rib section 142 for processing, the material is not easy to break during the friction process with the rice sieve, thereby reducing the broken rice rate. Especially for the household rice milling machine with a relatively small volume, the diameters of its rice milling roller and rice sieve are relatively small, and the above effect is more obvious.

[0026] The length a of the straight rib section 141 and the length b of the spiral rib section 142 of the rice milling roller also have an impact on the broken rice rate and the efficiency of the rice milling machine. In the existing household rice milling machines, the length of the straight rib section 141 of the rice milling roller is less than the length of the spiral rib section 142. Optimally, in the present invention, the length of the straight rib section 141 is greater than the length of the spiral rib section 142. The spiral rib section 142 will increase the resistance to the forward movement of the material. In the present invention, the length of the straight rib section 141 is set to be greater than the length of the spiral rib section 142, that is, the length of the spiral rib section 142 is less than the length of the straight rib section 141. In this way, the resistance to the forward movement of the material provided by the spiral rib section 142 can be controlled so that it will not be too large, facilitating the adjustment of the direction of the material in the straight rib section 141. In addition, the shorter spiral rib section 142 is also beneficial to reducing the broken rice rate and improving the production efficiency.

[0027] Experiments show that optimally, in the present invention, the ratio of the length a of the straight rib section 141 to the length b of the spiral rib section 142 is 1.4 - 1.6, which is most beneficial to reducing the broken rice rate of the rice milling machine.

[0028] The spiral lift angle of the spiral rib section 142 also has a certain impact on the broken rice rate of the rice milling machine. In the present invention, the spiral lift angle of the spiral rib section 142 is 45° - 60°

[0029] In traditional rice milling machines, the shaft diameter of the milling part 12 is generally larger than the shaft diameter of the feeding part 11 to play a role in stabilizing the rice pressure. Since the grinding rib 14 of the present invention is provided with a spiral rib section 142 with a spiral direction opposite to that of the feeding rib 13, the spiral rib section 142 has already played a role in stabilizing the rice pressure. Therefore, the shaft diameter of the milling part 12 can be reduced. Therefore, in the present invention, the shaft diameter of the milling part 12 can be equal to or less than the shaft diameter of the feeding part 11. The shaft diameter of the milling part 12 being equal to or less than the shaft diameter of the feeding part 11 can not only reduce the cost of the rice milling roller, but also facilitate the miniaturization of the rice milling machine.

[0030] For household rice milling machines, the shaft diameter of the rice milling roller body generally ranges from 5 to 50 mm. Too many grinding ribs 14 on the rice milling roller will not only increase the processing cost, but also affect the efficiency of the rice milling machine, and the broken rice rate of the rice milling machine will also increase. For household rice milling machines, it is optimal to have two grinding ribs 14.

[0031] If the spacing between the feeding ribs is too small, the material may be crushed by the feeding ribs when passing through the feeding ribs, which will also affect the broken rice rate of the rice milling machine. Optimally, the spiral pitch c of the feeding rib 13 is greater than or equal to 10 mm, generally 10 - 12 mm.

[0032] The present invention also provides a household rice milling machine using the above-mentioned rice milling roller. As Figure 3As shown in the figure, it includes a housing 2, a hopper 3, a motor 7 and a rice milling mechanism. The motor 7 and the rice milling mechanism are both arranged inside the housing 2. The hopper 3 is connected above the rice milling mechanism. The rice milling mechanism includes a rice milling housing 4, a rice sieve 5 and the rice milling roller 1 of the above-mentioned household rice mill. One end of the feeding part 11 of the rice milling roller 1 is in transmission connection with the motor 7. The rice sieve 5 is sleeved on the milling part 12 of the rice milling roller 1. The motor 7 is used to provide power to rotate the rice milling roller 1. The material enters the rice milling mechanism through the hopper and is sent into the rice milling housing 4 by the feeding ribs 13, and the rice grains are formed after milling by the milling part. Because the above-mentioned rice milling roller 1 is adopted in the household rice mill of the present invention, all or most of the materials passing through the linear rib section can adjust their directions when passing through the linear rib section, so that the length direction is consistent with the extension direction of the linear rib section, but it will not cause the materials to be over-milled and broken due to the too long linear rib section. In this way, the materials are not easy to break during the subsequent friction process with the rice sieve, so that the broken rice rate can be reduced.

[0033] The rice sieve 5 can adopt a cylindrical rice sieve or a regular polygon rice sieve. In the embodiment of the present invention, the rice sieve 5 adopts a hexagonal rice sieve.

[0034] The sieve holes of the rice sieve 5 can be holes of various shapes. Such as Figure 3 and Figure 4 As shown in the figure, in the present invention, optimally, the rice sieve 5 is provided with strip-shaped sieve holes 51 whose length is greater than the width, and the strip-shaped sieve holes 51 are inclined with respect to the axis direction of the rice milling roller 1. Setting the sieve holes into strips and inclining them with respect to the axis direction of the rice milling roller 1 is beneficial to the forward movement of the materials (towards the rice outlet direction) and also beneficial to reducing broken rice.

[0035] Specifically, along the material discharge direction 6, the sieve holes 51 can be inclined upward or downward. Since the materials move forward (towards the rice outlet direction) while making a circumferential movement, therefore, on the lower rotating side of the rice milling roller 1, the materials are subjected to the action of the rice milling roller and move obliquely downward, while on the upper rotating side, the materials move obliquely upward. For this reason, in order to facilitate the forward movement of the materials and reduce the generation of broken rice, preferably, along the material discharge direction 6, on the lower rotating side of the rice milling roller 1, the sieve holes 51 are inclined downward, and on the upper rotating side of the rice milling roller 1, the sieve holes 51 are inclined upward. In addition, adopting the above-mentioned sieve hole structure is also beneficial to making the length direction of the materials roughly consistent with the extension direction of the linear rib section during milling and moving forward. The inclination angle between the sieve holes and the material discharge direction 6 is generally optimal at 10° - 30°.

[0036] Specifically, the lower rotating side of the rice milling roller 1 refers to the side where the rice milling roller rotates downward, and the upper rotating side of the rice milling roller 1 refers to the side where the rice milling roller rotates upward. Such as Figure 4As shown, taking the rotation direction 8 of the rice milling roll as counterclockwise, the lower rotating side of the rice milling roll 1 in the figure is the left half side of the rice sieve, and the upper rotating side of the rice milling roll 1 is the right half side of the rice sieve.

Claims

1. Rice milling roller for household rice milling machine, comprising a rice milling roller body, the rice milling roller body axially includes two parts, one of which is a feeding part (11), and the other is a grinding part (12). A feeding rib (13) protruding from the shaft surface in a spiral shape is provided on the shaft of the feeding part (11), and at least two grinding ribs (14) protruding from the shaft surface are provided on the shaft of the grinding part (12), characterized in that: The grinding rib (14) includes a spiral rib segment (142) with a spiral direction opposite to that of the feeding rib (13), and a linear rib segment (141) with one end connected to one end of the spiral rib segment (142) and extending along the axial direction of the rice milling roller body. The linear rib segment (141) is arranged close to the feeding part (11), and the length of the linear rib segment (141) is greater than 30 mm and less than 50 mm.

2. The rice milling roller of the household rice milling machine according to claim 1, characterized in that: The spiral angle of the spiral rib segment (142) is 45° to 60°.

3. The rice milling roller of the household rice milling machine according to claim 1 or 2, characterized in that: The length of the linear rib segment (141) is greater than the length of the spiral rib segment (142).

4. The rice milling roller of the household rice milling machine according to claim 3, characterized in that: The ratio of the length of the linear rib segment (141) to the length of the spiral rib segment (142) is 1.4 to 1.

6.

5. The rice milling roller of the household rice mill according to claim 1, characterized in that: The shaft diameter of the grinding part (12) is equal to or less than the shaft diameter of the feeding part (11).

6. The rice milling roller of the household rice milling machine according to claim 1, characterized in that: There are two grinding ribs (14).

7. The rice milling roller of the household rice milling machine according to claim 1, characterized in that: The spiral pitch of the feeding rib (13) is greater than or equal to 10 mm.

8. Household rice mill, characterized in that: It includes a machine shell (2), a hopper (3), a motor (7) and a rice milling mechanism. The motor (7) and the rice milling mechanism are both arranged inside the machine shell (2). The hopper (3) is connected above the rice milling mechanism. The rice milling mechanism includes a rice milling shell (4), a rice sieve (5) and a household rice milling roller (1) as described in any one of claims 1 to 7. One end of the feeding part (11) of the rice milling roller (1) is in transmission connection with the motor (7), and the rice sieve (5) is sleeved on the grinding part (12) of the rice milling roller (1).

9. The household rice milling machine according to claim 8, characterized in that: The rice sieve (5) is provided with strip-shaped sieve holes (51), and the strip-shaped sieve holes (51) are inclined with respect to the axial direction of the rice milling roller (1).

10. The household rice milling machine according to claim 9, characterized in that: Along the material discharging direction, on the lower turning side of the rice milling roller (1), the sieve holes (51) are inclined downward, and on the upper turning side of the rice milling roller (1), the sieve holes (51) are inclined upward.

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