Assembly type rice hulling rubber sleeve and iron-core-free rice hulling rubber roller

Abstract

The invention discloses an assembly type rice hulling rubber sleeve and a coreless rice hulling rubber roller, and belongs to the technical field of rice processing equipment. The rice hulling rubber sleeve is a cylindrical rubber body, a plurality of protruding connecting structures are evenly distributed on the inner circumferential face of the rice hulling rubber sleeve and used for being coupled with corresponding structures on a supporting roller or a fast and slow shaft of the rice huller, and detachable fixing is achieved. The coreless rice hulling rubber roller comprises a rigid supporting roller and the rice hulling rubber sleeve arranged outside the rigid supporting roller in a sleeving mode. A spiral female groove is formed in the outer circumferential face of the supporting roller, a protruding connection structure on the inner circumferential face of the rubber sleeve is a spiral male tenon matched with the protruding connection structure, and the protruding connection structure and the rubber sleeve are embedded to transmit torque. The cross section of the spiral male tenon is in a dovetail shape or a similar self-locking shape, and the spiral male tenon and the spiral female groove form a reverse self-locking tenon-and-mortise structure. The spiral direction is opposite to the working rotation direction; and the matching surface has axial taper. Chemical bonding is replaced by physical connection, rapid online replacement of the rubber sleeve is achieved, and the rubber sleeve has the advantages of being reliable in connection, stable in operation, environmentally friendly and low in cost.

Description

Technical Field

[0001] This invention relates to the field of rice processing equipment technology, specifically to an important consumable spare part of a rice huller—the rice hulling rubber roller, and more particularly to a detachable rice hulling rubber sleeve and a coreless rice hulling rubber roller using the sleeve. Background Technology

[0002] As a core consumable spare part of rice hullers in the rice processing process, the rice huller roller has occupied an important position in the national economy and people's livelihood since its introduction in the late 1850s and early 1860s. However, the technological development of this niche industry has lagged behind, and it still uses labor-intensive traditional production methods.

[0003] Traditional rice hulling rollers consist of two parts: an iron core and a rubber layer. By applying a chemical adhesive, such as Kemlock adhesive, to the surface of the iron core, and then covering it with the rubber layer and subjecting it to vulcanization, the two parts are fixed together. This production method presents numerous problems: First, the working environment is harsh. The process requires cleaning workpieces with 120-octane gasoline, and applying chemical adhesives generates harmful gases. The high-temperature environment makes mold loading and unloading labor-intensive, and waste adhesive fibers are difficult to dispose of, seriously impacting the health of operators. Second, production and installation are cumbersome, relying heavily on manual labor, making automated production extremely difficult and resulting in low production efficiency. Third, the products are heavy, causing numerous inconveniences in manufacturing, transportation, storage, and installation. Fourth, traditional rice hulling rollers are connected to the rice hulling machine via a roller core shaft, with a metal-to-metal contact surface. The machining precision of the roller core, the coaxiality of the assembly, and the wear generated during each installation and operation all severely affect the stable operation of the rice hulling machine. Furthermore, the adhesive layer cannot automatically repair itself after wear, easily leading to vibration problems and affecting the hulling effect. Fifth, the use of chemical adhesives does not meet high food hygiene standards, posing potential food safety hazards.

[0004] With the rapid development of modern science and technology, traditional products in all industries have undergone disruptive upgrades. In order to meet the needs of the rice processing industry for efficient, environmentally friendly, safe and convenient production, it is imperative to carry out structural innovation and process transformation of rice hulling rollers. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, a first aspect of this invention provides a detachable rice hulling sleeve. A second aspect of this invention provides a coreless rice hulling roller employing this sleeve.

[0006] According to a first aspect of the present invention, the rice hulling rubber sleeve is a cylindrical rubber body, and a plurality of protruding connecting structures are evenly distributed on the inner circumferential surface of the cylindrical rice hulling rubber sleeve; the connecting structures are configured to couple with corresponding structures on the support rollers or the fast and slow shafts of the rice hulling machine to achieve detachable fixing of the rice hulling rubber sleeve.

[0007] According to some embodiments of the present invention, the protruding connecting structure may be one of a spiral tenon, an axial tenon, or evenly distributed protrusions, wherein the spiral tenon and the axial tenon are preferably double-conical structures.

[0008] According to some embodiments of the present invention, when the protruding connecting structure is a spiral tenon, its spiral direction may be opposite to the designed rotation direction of the rice hulling sleeve during operation.

[0009] According to some embodiments of the present invention, the protruding connecting structure may be a male tenon, which is configured to be axially coupled to a female tenon provided on a support roller or a fast / slow shaft, and the mating surface of the male tenon and the female tenon has a continuous taper from the inlet end to the abutment end.

[0010] According to some embodiments of the present invention, the rice hulling sleeve is made of styrene-butadiene rubber, nitrile rubber or polyurethane as the main material; when styrene-butadiene rubber or nitrile rubber is used, the rice hulling sleeve is vulcanized, and the surface hardness of the rubber layer after vulcanization is 90 to 98 Shore hardness.

[0011] According to a second aspect of the present invention, a coreless rice hulling roller comprises:

[0012] Rigid cylindrical support roller;

[0013] The cylindrical rice hulling rubber sleeve, as described above, is fitted over the support roller;

[0014] The outer circumferential surface of the support roller is evenly provided with multiple spiral female grooves, and the protruding connecting structure on the inner circumferential surface of the rice hulling sleeve is a spiral male tenon that mates with the spiral female grooves. The spiral female grooves and the spiral male tenons are interlocked to transmit torque.

[0015] According to some embodiments of the present invention, the cross-section of the spiral male tenon is dovetail-shaped, or it is a shape that can form a reverse self-locking with the spiral female groove, with the tenon width being greater than the neck width, and the spiral female groove and the spiral male tenon form a reverse self-locking mortise and tenon structure.

[0016] According to some embodiments of the present invention, the mating surfaces of the spiral female groove and the spiral male tenon along the axial direction have a continuous taper from the inlet end to the abutment end.

[0017] According to some embodiments of the present invention, the spiral direction of the spiral groove is opposite to the designed rotation direction of the rice hulling roller during operation.

[0018] According to some embodiments of the present invention, the support roller is a hollow cylindrical structure, and the middle part of the support roller is provided with a flange with a positioning structure for connecting with the shaft of the rice huller.

[0019] The rice hulling rubber sleeve and the coreless rice hulling rubber roller according to embodiments of the present invention have at least the following beneficial effects:

[0020] Easy to replace: After the rubber sleeve is worn, there is no need to disassemble the support roller or machine shaft. The old one can be removed and the new one installed simply by rotating it online. It can be operated by a single person and takes very little time.

[0021] Low cost: Users only need to stock spare parts for lower-cost rice hulling rubber bushings, saving on overall maintenance costs such as replacement of the entire rubber roller and professional repairs.

[0022] Reliable connection: Torque is transmitted through the interlocking of the spiral male tenon and spiral female groove. In particular, the reverse self-locking tenon structure and tapered fit design ensure high connection strength and good stability, effectively preventing loosening and jumping during operation.

[0023] Smooth operation: The spiral engagement process features an automatic centering function, ensuring high coaxiality between the rubber sleeve and the support roller. The large spiral meshing surface ensures uniform torque transmission, reduces vibration, and improves the stability and accuracy of the hulling process.

[0024] Environmentally friendly and healthy: It completely eliminates chemical adhesives and organic solvents, and the production process is clean, meeting the requirements of green manufacturing and food hygiene.

[0025] Good versatility: The standardized support roller can be adapted to various specifications of rubber sleeves, which improves the versatility of the product and the efficiency of spare parts management.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0028] Figure 1 This is a three-dimensional structural diagram of a coreless rice hulling roller according to the present invention;

[0029] Figure 2 This is a schematic diagram of the support roller structure in this invention;

[0030] Figure 3 This is a schematic diagram of the rice hulling sleeve structure in this invention;

[0031] Figure label:

[0032] 1-Support roller; 2-Rice hulling rubber sleeve; 3-Flange; 4-Spiral female groove; 5-Spiral male tenon. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0035] In the description of this invention, "several" refers to one or more, and "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0036] In the description of this invention, unless otherwise explicitly defined, terms such as setting, installing, and connecting should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0037] Example 1

[0038] like Figure 3 As shown, this embodiment of the invention provides a rice hulling rubber sleeve 2. The rice hulling rubber sleeve 2 is a cylindrical rubber body, with multiple protruding connecting structures evenly distributed on its inner circumferential surface. In this embodiment, the protruding connecting structure is specifically manifested as a spiral tenon 5. The spiral tenon 5 is configured to connect with the support roller 1 of the rice hulling machine (e.g., ...). Figure 2 The spiral groove 4 on the hull or the corresponding structure on the fast and slow shaft are coupled to achieve the detachable fixation of the hull rubber sleeve 2.

[0039] In optional embodiments, the protruding connection structure can also be in different forms such as spiral tenons, axial tenons, or evenly distributed snap protrusions (not shown separately in the figure), as long as it can achieve coupling and detachable fixation with the corresponding structure. Among them, the spiral tenons and axial tenons are selected as double conical structures.

[0040] Example 2

[0041] like Figures 1 to 3 As shown, this embodiment of the invention provides a coreless rice hulling roller, which mainly consists of two parts: a support roller 1 and a rice hulling sleeve 2 sleeved on the outside.

[0042] The support roller 1 is a rigid cylindrical structure, preferably made of high-strength alloy steel or high-quality cast iron. It is a hollow cylindrical structure to reduce weight. In the middle of the support roller 1, there is an integrally formed or connected flange 3. The flange 3 has mounting holes and / or keyways and other positioning structures for precise and rigid connection with the drive shaft of the rice huller. The support roller 1 is installed and positioned on the equipment in a single step.

[0043] Multiple spiral grooves 4 are uniformly machined on the outer circumferential surface of the support roller 1.

[0044] The rice hulling sleeve 2 is a cylindrical rubber body as described in Example 1. Specifically, the raised connecting structure on its inner circumference is a spiral tenon 5 that mates with the spiral female groove 4. The spiral female groove 4 and the spiral tenon 5 interlock, allowing the rotational torque of the support roller 1 to be effectively transmitted to the rice hulling sleeve 2 through their meshing surfaces.

[0045] As a preferred connection method, the cross-section of the spiral tenon 5 is dovetail-shaped (or similar to a shape where the tenon width is greater than the neck width), and the spiral female groove 4 has a matching shape, so that the spiral female groove 4 and the spiral tenon 5 form a reverse self-locking mortise and tenon structure.

[0046] Furthermore, the mating surfaces of the spiral female groove 4 and the spiral male tenon 5 along the axial direction have a continuous taper from the inlet end to the abutment end. This taper design makes installation smoother and produces an additional tightening effect after tightening.

[0047] Furthermore, the spiral direction of the spiral groove 4 is designed to be opposite to the designed rotation direction of the rice hulling roller when it is working on the rice hulling machine. For example, if the roller is designed to rotate clockwise, the spiral groove 4 will rotate counterclockwise. This design converts the torque during operation into a force that presses the rubber sleeve 2 against the meshing surface of the support roller 1, achieving "self-locking" and preventing loosening.

[0048] The rice hulling sleeve 2 can be made primarily of styrene-butadiene rubber, nitrile rubber, or polyurethane. When styrene-butadiene rubber or nitrile rubber is selected, the rice hulling sleeve 2 undergoes vulcanization treatment, and the hardness of its working surface is controlled within the Shore hardness range of 90 to 98 degrees after vulcanization.

[0049] Assembly and working principle:

[0050] During assembly, align the starting end of the spiral male tenon 5 at the end of the rice hull rubber sleeve 2 with the starting end of the spiral female groove 4 at the end of the support roller 1, and then rotate the rice hull rubber sleeve 2 in the spiral direction (i.e., the opposite direction to the working rotation direction). Guided by the tapered surface and the slight elastic deformation of the rubber, the spiral male tenon 5 is smoothly inserted along the spiral female groove 4 until the end face of the rice hull rubber sleeve 2 is in contact with the positioning surface of the support roller 1, thus completing the installation (e.g., ...). Figure 1 (As shown).

[0051] During operation, the rice huller drives the support roller 1 to rotate in the designed direction. Because the spiral directions are opposite, the working torque is converted into an axial force that presses the rubber sleeve 2 and the support roller 1 together more tightly, achieving reliable self-locking. The torque is evenly transmitted through the large-area spiral meshing surface, driving the rice hulling rubber sleeve 2 to work efficiently and smoothly.

[0052] Replacement operation:

[0053] When the working surface of the rice hulling sleeve 2 is worn and needs to be replaced, simply rotate the sleeve 2 in the opposite direction (i.e., along the working rotation direction) on the equipment to easily unscrew it from the support roller 1. Then, screw on the new sleeve 2 according to the assembly method described above. The entire process does not require disassembling the support roller 1, making it quick and convenient. Example 3

[0054] In another variant embodiment, the independent support roller 1 can be omitted, and the spiral groove 4 can be directly machined onto the core surface of the fast and slow shafts of the rice huller. In this case, the rice huller sleeve 2 described in Embodiment 1 is directly fitted onto the outer circumference of the fast and slow shafts. The spiral tenon 5 engages with the spiral groove 4, achieving detachable fixation and torque transmission of the rice huller sleeve 2 on the shaft. Its connection structure features (such as dovetail shape, taper, reverse spiral, etc.) and beneficial effects are the same as those described in Embodiment 2.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rice hulling sleeve, characterized in that, The rice hulling sleeve is a cylindrical rubber body, and the inner circumferential surface of the cylindrical rice hulling sleeve is evenly provided with multiple protruding connecting structures. The connection structure is configured to couple with a corresponding structure on the support roller or fast / slow shaft of the rice huller to achieve detachable fixing of the rice huller rubber sleeve.

2. A coreless rice hulling roller, characterized in that, include: Rigid cylindrical support roller; The cylindrical rice hulling rubber sleeve as described in claim 1, sleeved outside the support roller; The outer circumferential surface of the support roller is evenly provided with multiple spiral female grooves, and the protruding connecting structure on the inner circumferential surface of the rice hulling sleeve is a spiral male tenon that mates with the spiral female grooves. The spiral female grooves and the spiral male tenons are interlocked to transmit torque.

3. The coreless rice hulling roller according to claim 2, characterized in that, The cross-section of the spiral male tenon is dovetail-shaped, or it is a shape that can form a reverse self-locking with the spiral female groove, with the tenon width being greater than the neck width. The spiral female groove and the spiral male tenon form a reverse self-locking mortise and tenon structure.

4. The coreless rice hulling roller according to claim 2, characterized in that, The mating surfaces of the spiral female groove and the spiral male tenon along the axial direction have a continuous taper from the inlet end to the abutment end.

5. The coreless rice hulling roller according to any one of claims 2 to 4, characterized in that, The spiral direction of the spiral groove is opposite to the designed rotation direction of the rice hulling roller during operation.

6. The coreless rice hulling roller according to any one of claims 2 to 5, characterized in that, The support roller is a hollow cylindrical structure, and a flange with a positioning structure is provided in the middle of the support roller for connection with the shaft of the rice huller.

7. The coreless rice hulling roller according to any one of claims 2 to 6, characterized in that, The rice hulling sleeve is made primarily of styrene-butadiene rubber, nitrile rubber, or polyurethane. When styrene-butadiene rubber or nitrile rubber is selected, the rice hull rubber sleeve is vulcanized, and the surface hardness of the rubber layer after vulcanization is 90 to 98 Shore hardness.

8. The rice hulling sleeve according to claim 1, characterized in that, The protruding connection structure is one of a spiral tenon, an axial tenon, or evenly distributed snap protrusions. When the protruding connecting structure is a spiral tenon, its spiral direction is opposite to the designed rotation direction of the rice hulling rubber sleeve during operation. Among them, the spiral tenon and the axial tenon are double-conical structures.

9. The rice hulling sleeve according to claim 1, characterized in that, The protruding connecting structure is a male tenon, which is configured to be axially coupled with a female tenon provided on the support roller or the fast and slow shaft, and the mating surface of the male tenon and the female tenon has a continuous taper from the inlet end to the abutment end.

10. The rice hulling sleeve according to claim 1, 8, or 9, characterized in that, The rice hulling sleeve is made primarily of styrene-butadiene rubber, nitrile rubber, or polyurethane. When styrene-butadiene rubber or nitrile rubber is selected, the rice hull rubber sleeve is vulcanized, and the surface hardness of the rubber layer after vulcanization is 90 to 98 Shore hardness.

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