The grinding structure in a food waste disposer

Abstract

The application provides a grinding structure in a kitchen waste processor and belongs to the technical field of kitchen waste treatment. The grinding structure comprises an upper grinding ring, a lower grinding ring and a grinding disc assembly rotatably arranged between the upper grinding ring and the lower grinding ring. The lower grinding ring is provided with a plurality of lower grinding teeth in the circumferential direction. The middle part of the grinding disc assembly is provided with middle grinding teeth which are located above the lower grinding teeth and form a lower grinding mechanism in cooperation with the lower grinding teeth. Each lower grinding tooth is distributed on the inner side of the lower grinding ring. The lower part of the grinding disc assembly is provided with a cutting part arranged horizontally. The cutting part is located on the inner side of each lower grinding tooth and is flush or substantially flush with the lower grinding teeth. The grinding structure has the advantages of more thorough treatment of fiber waste, less likelihood of machine blockage and higher reliability.

Description

Technical Field

[0001] This invention belongs to the field of kitchen waste treatment technology, and relates to the grinding structure in a kitchen waste processor. Background Technology

[0002] Food waste disposers are common auxiliary devices in modern kitchens. Installed at the bottom of the sink, they contain a grinding mechanism. Food waste is flushed directly into the disposer from the sink for grinding and pulverizing before being discharged into the sewer. For example, a food waste disposer disclosed in patent application number 201310197438.9 includes a casing with a drain outlet. Inside the casing are a grinding chamber, a grinding mechanism, and a drive unit. These components together form the main body of the disposer. The grinding mechanism, located within the grinding chamber, primarily consists of an impact hammer, a feed blade, side blades, a grinding disc, and an auxiliary blade disc. The auxiliary blade disc is fixedly installed within the grinding chamber and parallel to the grinding disc. The side blades have straight blades and externally mounted horizontal blades. The auxiliary blade disc has built-in horizontal auxiliary teeth. The horizontal blades on the side blades are positioned above the grinding teeth on the grinding disc, while the auxiliary teeth on the auxiliary blade disc are positioned below the grinding teeth. During operation, waste is discharged into the grinding chamber along with water. Inside the chamber, it is first crushed by impact hammers, then cut and pulverized by straight blades, followed by a second grinding and cutting process by horizontal blades and grinding teeth on the grinding disc. Finally, a second grinding and cutting process is performed by grinding teeth on the grinding disc and horizontal auxiliary teeth on the auxiliary cutter disc. This structure results in smaller pulverized particles, simplifies discharge, and prevents sewer blockages.

[0003] However, in reality, kitchen waste includes both hard residues such as bones and softer, long-fiber residues such as vegetable and fruit peels. Harder residues like bones can be well processed after being impacted by the hammer, ground and cut by the grinding teeth on the cross blade and grinding disc, and then ground and cut by the grinding teeth and the horizontal auxiliary teeth on the auxiliary blade disc. However, softer, long-fiber residues are difficult to grind away by the upper grinding mechanism consisting of the grinding teeth on the cross blade and grinding disc, and the lower grinding mechanism consisting of the grinding teeth and the auxiliary grinding teeth on the auxiliary blade disc. As a result, soft, long-fiber residues will accumulate in the machine for a long time, causing blockages and jamming inside the machine. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a grinding structure in a food waste disposer, which solves the problem of incomplete fibrous waste treatment causing easy clogging inside the machine.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] The grinding structure in a food waste disposer includes an upper grinding ring, a lower grinding ring, and a grinding disc assembly rotatably disposed between the two. The lower grinding ring has a plurality of lower grinding teeth along its circumference. The grinding disc assembly has a middle grinding tooth located above the lower grinding teeth and cooperating with them to form a lower grinding mechanism along its central edge. The lower grinding teeth are distributed on the inner side of the lower grinding ring, and the lower edge of the grinding disc assembly has a horizontally arranged cutting portion located on the inner side of each lower grinding tooth. The cutting portion is flush with or approximately flush with the lower grinding teeth.

[0007] The grinding structure is housed within the casing of the food waste disposer. Both the upper and lower grinding rings are fixed within the casing and separated by a rubber pressure ring. The output shaft of the motor, located within the casing, passes upwards through the grinding disc assembly and is circumferentially fixed. When the motor's output shaft rotates, it drives the grinding disc assembly to rotate relative to the upper and lower grinding rings. The food waste disposer is connected below the sink drain. When the sink drains, food waste is flushed into the disposer's casing and falls into the area formed by the inner side of the upper grinding ring and the upper side of the grinding disc assembly. The motor drives the lower cutting disc and grinding disc to rotate at high speed simultaneously. Under centrifugal force, the food waste is gradually thrown to the inner wall of the upper grinding ring and pulverized. Afterwards, the food waste flows downwards with the water and is further ground horizontally by the lower grinding mechanism, formed by the lower sides of the middle grinding teeth and the upper sides of the lower grinding teeth.

[0008] The lower grinding mechanism is effective at grinding harder food waste, but it cannot effectively process fibrous materials due to their fineness. Furthermore, the lower edge of the grinding disc assembly has horizontally positioned cutting sections located inside each lower grinding tooth and flush or nearly flush with them. As the grinding disc assembly rotates, fibrous food waste is continuously squeezed between the cutting sections and the lower grinding teeth. Then, as the grinding disc assembly continues to rotate relative to the lower grinding ring, the cutting sections and the lower grinding teeth work together to continuously pull and thoroughly cut the fibrous food waste. This prevents incomplete processing of fibrous food waste and potential internal blockages, improving reliability. Moreover, the lower grinding teeth function as part of the lower grinding mechanism, grinding while simultaneously working with the cutting sections to pull and cut the fibers, thus achieving two functions simultaneously. This results in improved food waste processing efficiency while maintaining a relatively simple and compact structure.

[0009] In the grinding structure of the aforementioned food waste processor, some of the lower grinding teeth are serrated, while the remaining lower grinding teeth are square.

[0010] The above configuration ensures that the lower grinding ring has sufficient grinding area; at the same time, the serrated lower grinding teeth also have the ability to cut the fibers. Thus, when the lower cutting disc rotates, these serrated lower grinding teeth and the cutting part of the lower edge of the grinding disc assembly can simultaneously and fully cut the fibers, allowing the fibers to be further processed to avoid clogging.

[0011] In the grinding structure of the aforementioned food waste processor, serrated lower grinding teeth and square lower grinding teeth are arranged alternately.

[0012] The serrated lower grinding teeth are spaced apart from the square lower grinding teeth. This ensures that harder kitchen waste is ground evenly during one rotation of the grinding disc assembly, while the fibers are cut evenly during one rotation of the grinding disc assembly.

[0013] In the grinding structure of the aforementioned food waste processor, the cutting section includes several horizontally arranged lower cutting teeth, each of which is continuously distributed circumferentially.

[0014] The cutting section is configured to include several horizontally arranged lower cutting teeth, which are continuously distributed circumferentially. During the rotation of the grinding disc assembly, each lower cutting tooth can cooperate with each lower grinding tooth to cut the fiber, further improving the fiber processing effect and avoiding blockage inside the machine.

[0015] In the grinding structure of the aforementioned food waste processor, both the lower cutting teeth and the serrated lower grinding teeth are right-angled triangles with the hypotenuse being the cutting surface. The inclination direction of the cutting surface of the lower cutting teeth is opposite to the inclination direction of the cutting surface of the serrated lower grinding teeth.

[0016] With the above configuration, when the grinding disc assembly rotates in one direction, the lower cutting teeth and the lower grinding teeth cut the fibers simultaneously, ensuring thorough processing without clogging the machine's interior. Simultaneously, when the grinding disc assembly rotates in the opposite direction, the cutting surfaces of the lower cutting teeth and the lower grinding teeth separate from the food waste, achieving proper discharge.

[0017] In the grinding structure of the aforementioned food waste disposer, the inclination angle of the cutting surface of each lower cutting tooth is the same, the inclination angle of the cutting surface of each serrated lower grinding tooth is the same, and the inclination angle of the cutting surface of the lower cutting tooth is different from that of the serrated lower grinding tooth.

[0018] The cutting surfaces of the lower cutting teeth have different inclination angles than the cutting surfaces of the serrated lower grinding teeth, which makes it easier for the fibers to be pulled and cut during the rotation of the grinding disc assembly.

[0019] In the grinding structure of the aforementioned food waste processor, the end of the lower cutting tooth is close to the end of the lower grinding tooth, and the lower edge of the grinding disc assembly also has a clearance notch. The cutting part is located at the lower edge of the grinding disc assembly except for the clearance notch.

[0020] In practice, the fibers are continuously squeezed into the clearance notch, and then, during the rotation of the grinding disc assembly, there is a pulling effect on the fibers. Furthermore, the ends of the lower cutting teeth and the lower grinding teeth are close to each other, which makes it easy and sufficient to cut the fibers that are pulled at the clearance notch.

[0021] In the grinding structure of the above-mentioned food waste processor, the upper edge of the grinding disc assembly has upper cutting teeth arranged horizontally, the upper grinding ring has a number of shearing holes arranged circumferentially, the bottom of the upper grinding ring has a number of upper grinding teeth arranged circumferentially, the shearing holes and the upper grinding teeth are arranged circumferentially at intervals, some of the shearing holes penetrate the bottom wall of the upper grinding ring, the upper grinding teeth are located above the middle grinding teeth, and the lower side of each upper grinding tooth cooperates with the upper side of each middle grinding tooth to form an upper grinding mechanism.

[0022] In practice, food waste falls into the area formed by the inner side of the upper grinding ring and the upper side of the grinding disc assembly. As the food waste passes through the shearing holes, it is sheared. During this process, the upper cutting teeth distributed along the upper edge of the grinding disc assembly also perform preliminary cutting of the fibers. This aims to break down the coarse fibers as much as possible, making it easier for the cutting part and the lower grinding teeth to fully pull and cut them subsequently. Afterward, the processed food waste passes through the shearing holes penetrating the bottom wall of the upper grinding ring. As the grinding disc assembly rotates relative to the upper grinding ring, it is first initially ground horizontally by the upper grinding mechanism, composed of the upper and lower sides of the middle and upper grinding teeth, and then falls downward through the gaps between the middle grinding teeth. Finally, it undergoes a second horizontal grinding by the lower grinding mechanism, composed of the lower sides of the middle and upper grinding teeth.

[0023] In the grinding structure of the above-mentioned food waste processor, the grinding disc assembly includes an upper disc, a middle disc, and a lower disc that are fixedly connected or integrally connected by connectors. Each upper cutting tooth is located at the edge of the upper disc, each middle grinding tooth is located at the edge of the middle disc, and the cutting part and clearance notch are located at the edge of the lower disc.

[0024] Compared with existing technologies, the grinding structure in this food waste disposer has the following advantages:

[0025] 1. By horizontally setting a cutting part along the lower edge of the grinding disc assembly, the cutting part is located inside each lower grinding tooth and is flush or roughly flush with the lower grinding tooth. During the rotation of the grinding disc assembly, the cutting part and the lower grinding tooth work together to continuously pull and fully cut the fibrous kitchen waste, avoiding the possibility of internal blockage caused by incomplete processing of fibrous kitchen waste, thus improving the reliability of use.

[0026] 2. The lower grinding teeth serve as part of the lower grinding mechanism, grinding the fibers and also working with the cutting part to pull and cut them. In other words, they perform two functions simultaneously, improving the efficiency of kitchen waste treatment while maintaining a relatively simple and compact structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the grinding structure in the first embodiment of this food waste disposer.

[0028] Figure 2 This is a top view of the grinding structure in the first embodiment of this food waste disposer.

[0029] Figure 3 yes Figure 2 Sectional view along the AA direction.

[0030] Figure 4 This is an exploded schematic diagram of the grinding structure in the first embodiment of this food waste disposer.

[0031] Figure 5 This is a schematic diagram showing the connection between the grinding disc assembly and the auxiliary plate in Embodiment 1.

[0032] Figure 6 This is a schematic diagram showing another angle of connection between the grinding disc assembly and the auxiliary plate in Embodiment 1.

[0033] Figure 7 This is a top view of the mating relationship between the lower plate and the lower grinding ring of the grinding disc assembly in Embodiment 1.

[0034] Figure 8 This is a three-dimensional schematic diagram of the lower plate of the grinding disc assembly in Embodiment 1.

[0035] In the diagram, 1. Upper grinding ring; 1a. Spike; 1b. Shearing hole; 1c. Upper grinding tooth; 2. Lower grinding ring; 2a. Lower grinding tooth; 3. Grinding disc assembly; 4. Upper disc; 4a. Cutting blade; 4b. Upper cutting tooth; 5. Middle disc; 5a. Middle grinding tooth; 6. Lower disc; 6a. Cutting section; 6a1. Lower cutting tooth; 6b. Clearance notch; 6c. Clearance groove; 7. Hydraulic hammer; 7a. Crushing section; 8. Auxiliary plate; 8a. Extension 1; 8a1. Scraper; 8a2. Pressure boosting and water-repellent blade; 8b. Extension 2; 9. Connector. Detailed Implementation

[0036] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0037] Example 1

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the grinding structure in the food waste disposer includes an upper grinding ring 1, a lower grinding ring 2, and a grinding disc assembly 3 rotatably disposed between the two. Two breaker hammers 7 are fixedly connected to the upper side of the grinding disc assembly 3. The two breaker hammers 7 are symmetrically arranged about the center line of the grinding disc assembly 3. Each of the two breaker hammers 7 has a crushing part 7a arranged radially along the grinding disc assembly 3 and close to the inner wall of the upper grinding ring 1. The inner wall of the upper grinding ring 1 is also provided with several protruding spikes 1a in the circumferential direction. The upper side of the grinding disc assembly 3 has a pointed cutting blade 4a, the tip of which is obliquely upward towards the inner wall of the upper grinding ring 1. The upper part of the grinding disc assembly 3 is located inside the upper grinding ring 1, and the upper edge of the grinding disc assembly 3 has several horizontally arranged upper cutting teeth 4b. The upper cutting teeth 4b are right-angled triangles with the hypotenuse as the cutting surface, and each upper cutting tooth 4b cooperates with the inner wall of the upper grinding ring 1. The upper grinding ring 1 is also provided with a plurality of shearing holes 1b along the circumference. A plurality of upper grinding teeth 1c are provided along the circumference on the outer bottom side of the upper grinding ring 1. The shearing holes 1b and the upper grinding teeth 1c are spaced apart along the circumference. Some of the shearing holes 1b penetrate the bottom wall of the upper grinding ring 1. The shearing holes 1b penetrating the bottom wall of the upper grinding ring 1 and the remaining shearing holes 1b are spaced apart along the circumference. The middle edge of the grinding disc assembly 3 has a middle grinding tooth 5a, which is located below the upper grinding teeth 1c. The lower side of each upper grinding tooth 1c cooperates with the upper side of each middle grinding tooth 5a to form an upper grinding mechanism. The lower grinding ring 2 has a plurality of lower grinding teeth 2a along the circumference. The middle grinding teeth 5a are located above the lower grinding teeth 2a, and the lower side of each middle grinding tooth 5a cooperates with the upper side of each lower grinding tooth 2a to form a lower grinding mechanism.

[0039] Furthermore, such as Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, the lower edge of the grinding disc assembly 3 has a horizontally arranged cutting portion 6a. Each lower grinding tooth 2a is distributed inside the lower grinding ring 2, and the cutting portion 6a is located inside each lower grinding tooth 2a, flush or approximately flush with the lower grinding tooth 2a. Some of the lower grinding teeth 2a are serrated, and the remaining lower grinding teeth 2a are square, with the serrated and square lower grinding teeth 2a spaced apart circumferentially. The cutting portion 6a includes several horizontally arranged lower cutting teeth 6a1, which are continuously distributed circumferentially. The ends of the lower cutting teeth 6a are close to the ends of the lower grinding teeth 2a. The lower edge of the grinding disc assembly 3 also has a clearance notch 6b, and the cutting portion 6a is located at a position on the lower edge of the grinding disc assembly 3 excluding the clearance notch 6b. In this embodiment, there are two clearance notches 6b, and the lower edge of the grinding disc assembly 3 between the two clearance notches 6b is provided with the aforementioned lower cutting teeth 6a. Both the lower cutting tooth 6a and the serrated lower grinding tooth 2a are right-angled triangles with the hypotenuse as the cutting surface. The inclination direction of the cutting surface of the lower cutting tooth 6a is opposite to that of the cutting surface of the serrated lower grinding tooth 2a. The inclination angle of the cutting surface of each lower cutting tooth 6a is the same, and the inclination angle of the cutting surface of each serrated lower grinding tooth 2a is the same. However, the inclination angles of the cutting surface of the lower cutting tooth 6a and the cutting surface of the serrated lower grinding tooth 2a are not the same.

[0040] Furthermore, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, an auxiliary plate 8 is fixedly connected to the lower side of the grinding disc assembly 3. The auxiliary plate 8 is provided with extensions 8a in opposite directions. One side of each extension 8a has an upward-facing scraper 8a1. The scraper 8a1 passes through the lower cutting disc 5 and the grinding disc 3 in sequence, and the scraper 8a1 is positioned close to the inner wall of the upper grinding ring 1. The other side of each extension 8a has a downward-facing pressure-boosting water-repelling plate 8a2. In this embodiment, the grinding disc assembly 3 includes an upper disc 4, a middle disc 5, and a lower disc 6 fixedly connected by a connector 9. Each upper cutting tooth 4b is located at the edge of the upper disc 4, and the cutting blade 4a is also located on the upper disc 4. Each middle grinding tooth 5a is located at the edge of the middle disc 5. The cutting part 6a and the clearance notch 6b are located on the lower disc 6. The lower disc 6 also has two strip-shaped clearance grooves 6c. The two clearance grooves 6c are respectively connected to the two clearance notches 6b. The scraper 8a1 passes through the connected clearance grooves 6c and passes through the middle disc 5 and the upper disc 4. In this embodiment, the auxiliary plate 8 is also provided with extensions 2 8b in opposite directions. Extensions 1 8a and extensions 2 8b are spaced apart. The connectors 9 are rivets and there are four of them. Two connectors 9 pass through the grinding disc assembly 3 and the extension 1 8a of the auxiliary plate 8 in sequence. The other two connectors 9 pass through the grinding disc assembly 3 and the extension 2 8b of the auxiliary plate 8 in sequence. The two breaker hammers 7 are also fixed to the grinding disc assembly 3 through these two connectors 9.

[0041] The grinding structure is housed within the casing of the food waste disposer. Both the upper grinding ring 1 and the lower grinding ring 2 are fixed within the casing and separated by a rubber retaining ring (specifically, the upper grinding teeth 1c near their ends abut against the upper side of the rubber retaining ring, and the lower side of the rubber retaining ring abuts against the upper side of the lower grinding ring 2). A motor is also housed within the casing. The motor's output shaft passes upwards through the auxiliary plate 8 and the grinding disc assembly 3, and is circumferentially fixed to the auxiliary plate 8. Since the auxiliary plate 8 and the grinding disc assembly 3 are also fixed together, rotating the motor's output shaft drives both the auxiliary plate 8 and the grinding disc assembly 3 to rotate simultaneously.

[0042] The housing of the food waste disposer is connected below the sink drain. When the sink drains, the food waste is flushed into the housing and falls onto the upper side of the upper plate 4 of the grinding disc 3. The motor drives the auxiliary plate 8 and the grinding disc assembly 3 to rotate at high speed simultaneously. Under centrifugal force, the food waste is gradually thrown to the inner wall of the upper grinding ring 1. During this process, the cutting blades 4a on the upper plate 4 can pull and cut fibrous food waste. Simultaneously, the crushing hammer 7 fixed to the upper plate 4 rotates with it. When the crushing hammer 7 passes over the protrusions 1a on the inner side of the upper grinding ring 1, it crushes and further cuts the food waste. Furthermore, the upper cutting teeth 4b on the edge of the rotating upper plate 4 cut the fibers as it rotates with the grinding disc assembly 3. The shearing holes 1b also allow the food waste to be sheared as it passes through the shearing holes 1b, squeezed by the crushing hammer 7, while rotating with the upper plate 4. The scraper blade 8a1 scrapes off the kitchen waste that may have been pulled, cut and crushed and attached to the inner wall of the upper grinding ring 1, so as to achieve automatic cleaning and ensure that the kitchen waste can be fully processed.

[0043] The processed kitchen waste passes through the shear hole 1b through the bottom wall of the upper grinding ring 1. As the grinding disc assembly 3 rotates relative to the upper grinding ring 1, it is initially ground horizontally by the upper grinding mechanism, composed of the upper sides of each intermediate grinding tooth 4a and the lower sides of each upper grinding tooth 1c. After grinding, the waste falls downwards through the gaps between the intermediate grinding teeth 4a. Then, a second horizontal grinding is performed by the lower grinding mechanism, composed of the lower sides of each intermediate grinding tooth 4a and the upper sides of each lower grinding tooth 2a. The upper and lower grinding mechanisms are effective at grinding harder kitchen waste, but fibrous waste, being softer, cannot be effectively processed by them. Furthermore, since the lower plate 6 of the grinding disc assembly 3 has a clearance notch 6b on its edge and a cutting part 6a is provided on the edge of the lower cutting disc 5 except for the clearance notch 6b, fibrous kitchen waste will continuously squeeze into the clearance notch 6b during the rotation of the grinding disc assembly 3. Then, as the grinding disc assembly 3 rotates continuously relative to the lower grinding ring 2, the cutting part 6a distributed on the edge of the lower plate 6 (excluding the clearance notch 6b) cooperates with the lower grinding teeth 2a to continuously pull and fully cut the fibrous kitchen waste. This avoids the possibility of internal blockage caused by incomplete processing of fibrous kitchen waste, thus improving the reliability of use. Moreover, some of the lower grinding teeth 2a are set in a serrated shape. This shape of lower grinding teeth 2a also has a good cutting ability for fibers. Therefore, when the grinding disc assembly 3 rotates, these serrated lower grinding teeth 2a and the cutting part 6a provided on the edge of the lower plate 6 of the grinding disc assembly 3 can simultaneously and fully cut the fibers, so that the fibers can be further processed to avoid blockage.

[0044] Example 2

[0045] The structure and principle of this embodiment are basically the same as those of Embodiment 1, except that in this embodiment, the upper plate 4, the middle plate 5 and the lower plate 6 are integrally fixed together.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A grinding structure in a kitchen waste disposer, comprising an upper grinding ring (1), a lower grinding ring (2) and a grinding disc assembly (3) rotatably arranged between the upper grinding ring (1) and the lower grinding ring (2), the lower grinding ring (2) having a plurality of lower grinding teeth (2a) arranged circumferentially, the grinding disc assembly (3) having a plurality of middle grinding teeth (5a) arranged at a middle edge of the grinding disc assembly (3) and above the lower grinding teeth (2a) to form a lower grinding mechanism together with the lower grinding teeth (2a), characterized in that, The lower grinding teeth (2a) are distributed on the inner side of the lower grinding ring (2), the lower edge of the grinding disc assembly (3) is provided with a horizontal cutting part (6a) located on the inner side of the lower grinding teeth (2a), the cutting part (6a) is flush or substantially flush with the lower grinding teeth (2a), the lower side of the grinding disc assembly (3) is fixedly connected with an auxiliary plate (8), the grinding disc assembly (3) comprises an upper disc (4), an intermediate disc (5) and a lower disc (6) fixedly connected by a connecting piece (9) or integrally connected, the middle grinding teeth (5a) are located on the edge of the intermediate disc (5), the cutting part (6a) is located on the edge of the lower disc (6), the lower grinding teeth (2a) are in the form of saw teeth, and the remaining lower grinding teeth (2a) are in the form of square teeth, the edge of the upper disc (4) is provided with upper cutting teeth (4b), the bottom of the upper grinding ring (1) is provided with a plurality of upper grinding teeth (1c) in the circumferential direction, the upper grinding teeth (1c) are located above the middle grinding teeth (5a) and the lower side surface of each upper grinding tooth (1c) cooperates with the upper side surface of each middle grinding tooth (5a) to form an upper grinding mechanism.

2. The grinding structure in a kitchen waste disposer according to claim 1, wherein, The lower grinding teeth (2a) in the form of saw teeth are arranged at intervals with the lower grinding teeth (2a) in the form of square teeth.

3. The grinding structure in a kitchen waste disposer according to claim 2, wherein, The cutting part (6a) comprises a plurality of horizontal lower cutting teeth (6a1) which are continuously distributed in the circumferential direction.

4. The grinding structure in a kitchen waste disposer according to claim 3, wherein, The lower cutting teeth (6a1) and the lower grinding teeth (2a) in the form of saw teeth are both in the form of right-angled triangles, and the faces where the hypotenuses are located are cutting faces, and the inclination directions of the cutting faces of the lower cutting teeth (6a1) are opposite to the inclination directions of the cutting faces of the lower grinding teeth (2a) in the form of saw teeth.

5. The grinding structure in a kitchen waste disposer according to claim 4, wherein, The inclination angles of the cutting faces of each lower cutting tooth (6a1) are the same, the inclination angles of the cutting faces of each lower grinding tooth (2a) in the form of saw teeth are the same, and the inclination angles of the cutting faces of the lower cutting teeth (6a1) and the lower grinding teeth (2a) in the form of saw teeth are different.

6. The grinding structure in a kitchen waste disposer according to claim 3 or 4 or 5, characterized in that, The end portions of the lower cutting teeth (6a1) are close to the end portions of the lower grinding teeth (2a), and the lower edge of the grinding disc assembly (3) is further provided with a clearance gap (6b), and the cutting part (6a) is located at a position on the lower edge of the grinding disc assembly (3) except the clearance gap (6b).

7. The grinding structure in a kitchen waste disposer according to claim 6, wherein, The upper grinding ring (1) is provided with a plurality of shearing holes (1b) in the circumferential direction, the shearing holes (1b) are arranged at intervals in the circumferential direction with the upper grinding teeth (1c), and part of the shearing holes (1b) penetrate the bottom wall of the upper grinding ring (1).

8. The grinding structure in a kitchen waste disposer according to claim 7, wherein, The clearance gap (6b) is located on the edge of the lower disc (6).

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