Grinding device of garbage disposer and garbage disposer

Abstract

The utility model relates to a kind of grinding device and garbage disposal of garbage processor, and grinding device includes the grinding ring in the grinding cavity of garbage processor and the cutterhead assembly being driven by driving motor and relatively rotating grinding ring, the cutterhead assembly includes cutter disc and the cutter head body being rotatably connected on the cutter disc around vertical extension axis, the cutter head body is adjacent to the cutting gap of the one end of grinding ring, the cutting gap is through to the bottom surface of the cutter head body, the grinding ring has inward protruding protruding tooth, in the cutter head body rotates with the cutter disc process, the protruding tooth of the grinding ring can pass through the cutting gap of the cutter head body, and with the cutting gap above the cutter head body form cutting cooperation. Advantage is that: after being cut, it can be conveniently discharged quickly.

Description

Technical Field

[0001] This utility model relates to the field of garbage disposal technology, and in particular to a grinding device and a garbage disposal unit. Background Technology

[0002] Food waste disposers are used to break down food scraps into small particles that are safe to pass through drain pipes. Traditional food waste disposers include a food conveying section, a motor section, and a grinding system located between the two sections. The grinding system is the core component of a food waste disposer and typically includes a rotating blade and a fixed grinding ring. The blade is equipped with blades (grinding hammers) for cutting food waste, and is mounted on a motor shaft. The motor drives the blade to rotate relative to the grinding ring, which generally has grinding holes and cutting teeth to further grind and pulverize the food waste thrown from the blade to the grinding ring. Chinese utility model patents ZL201320009262.5 (authorization announcement number CN203184086U) entitled "Food Waste Disposer" and ZL201210110326.0 (authorization announcement number CN102631971B) entitled "Grinding Mechanism in a Food Waste Disposer" both disclose such grinding systems.

[0003] In existing garbage disposal unit blade assemblies, the blade head basically rotates around a fixed axis parallel to the normal direction of the blade disc in a plane parallel to the blade disc. In order to increase the utilization efficiency of the blade head assembly and improve the cutting and grinding capabilities of the blade disc assembly, a multi-degree-of-freedom rotation method for the blade head is also adopted. For example, the blade head assembly of the food waste disposer with application number CN201921807698.2 includes a base and a blade head. The base is bolted to the blade disc and can rotate around the fixed bolt. The base is also snapped to the blade head, so that the blade head can rotate 360° with the base in its plane and can also rotate within 0-90° around its snapping axis, realizing multi-degree-of-freedom rotation in planes perpendicular to the surface of the blade disc.

[0004] However, the blade assembly in the aforementioned patent application CN201921807698.2 still has some shortcomings: during the rotation of the cutter head, an important cutting and crushing method is to cooperate with the outer grinding ring (usually equipped with cutting teeth). However, the cutter head in this patent application has a notch at the top of the free end to form a stepped structure. Through this stepped structure, it forms a cutting cooperation with the cutting teeth on the grinding ring. However, after the waste material, especially fibrous waste material, is cut, it is easy to be continued to be driven by the cutter head and stay on the upper part of the cutter head. That is, it cannot fall down to the bottom of the cutter head in time through the gap between the cutter head and the grinding ring to achieve rapid material discharge.

[0005] Therefore, the grinding devices in existing garbage disposals still need further improvement. Utility Model Content

[0006] The first technical problem to be solved by this utility model is to provide a grinding device for a garbage processor that facilitates the rapid feeding and discharge of garbage materials after they have been cut, in light of the current state of the technology.

[0007] The second technical problem to be solved by this utility model is to provide a garbage disposal unit that uses the above-mentioned grinding device, in view of the current state of the prior art.

[0008] The technical solution adopted by this utility model to solve the first technical problem is as follows: a grinding device for a garbage disposal unit, including a grinding ring located in the grinding chamber of the garbage disposal unit and a blade assembly that can be driven by a drive motor to rotate relative to the grinding ring. The blade assembly includes a blade and a blade head body that can be rotatably connected to the blade head about a vertically extending axis. The end of the blade head body adjacent to the grinding ring has a cutting notch that extends to the bottom surface of the blade head body. The grinding ring has inwardly protruding teeth. During the rotation of the blade head body with the blade head, the teeth of the grinding ring can pass through the cutting notch of the blade head body and form a cutting engagement with the portion above the cutting notch of the blade head body.

[0009] As an improvement, the cutter head body includes a connector and a cutter head body. The connector is rotatably connected to the cutter disc via a vertically extending first pin. The cutter head body is rotatably connected to the connector in a manner that allows it to deflect vertically relative to the connector. During rotation with the cutter disc, the cutter head body can deflect upwards when encountering hard objects or material accumulation, adaptively avoiding impact, buffering the impact force, and protecting the drive mechanism. Furthermore, the deflection structure absorbs impact energy, reducing abnormal machine vibration.

[0010] As an improvement, the cutter head body has at least two arranged side by side, and each cutter head body of the same cutter head body is rotatably connected to the same connector, and each can independently deflect up and down relative to the connector. Multiple cutter head bodies (at least two) share a connector and are uniformly mounted on the cutter disc via a first pin on the connector. Compared with the traditional mode of "one cutter head with one independent connecting base" in the prior art, this significantly reduces the number of independent mounting bases (connectors) required on the cutter disc, and significantly saves valuable cutter disc mounting surface space. On the other hand, thanks to the above-mentioned space optimization, more cutter head bodies can be deployed than the traditional single cutter head single base scheme when the cutter disc area remains unchanged or is limited, and the entire cutter disc assembly has a denser cutting, impact, and grinding point. On this basis, the independent multi-degree-of-freedom motion capability of each cutter head body is superimposed, which greatly improves the frequency, intensity, and coverage of the impact, cutting, and grinding effects on the material per unit time, and realizes the maximum crushing capacity of the cutter disc assembly in a limited space. Furthermore, although each cutter head body in this invention is connected to the same connector, it can independently deflect up and down relative to the connector, thus having stronger material adaptability and more efficient crushing ability (such as pulling fibrous materials and avoiding and impacting hard objects).

[0011] To achieve a rotatable connection between the cutter head, the connector, and the cutter head body, the connector includes a horizontally extending connecting plate and a U-shaped plate connected to the end of the connecting plate. The U-shaped plate includes two vertically extending and side-by-side vertical plates. A horizontally extending second pin is provided between the two opposite vertical plates of the U-shaped plate. Each cutter head body of the same cutter head body is rotatably connected to the second pin.

[0012] To further improve cutting and crushing effects, at least two adjacent cutter heads within the same cutter head body have different top heights. This height difference allows for more contact points between the cutter heads and the waste, achieving staggered cutting. The resulting stepped cutter head combination also disrupts fiber entanglement paths, reducing clogging issues.

[0013] As an improvement, the cutter head body has a connecting end for connecting to the connecting member and a free end away from the connecting member. The connecting ends of each cutter head body are located within the U-shaped plate and connected to the second pin. The portion (connecting end) of the cutter head body is built into the U-shaped plate, which restricts the lateral sway of the cutter head body and improves cutting stability. All cutter head bodies share the same pin, reducing the number of parts and assembly complexity.

[0014] The aforementioned "different top heights of two adjacent cutter heads" can refer to the top surfaces of the two cutter heads having different heights at any radial position, or it can refer to different heights only in certain areas. In a preferred embodiment, the highest points of the top surfaces of two adjacent cutter heads within the same cutter head body have a height difference. Considering that a structural design where "the top surfaces of two cutter heads have different heights at any radial position" might lead to excessive instantaneous load on the drive motor and a surge in motor power consumption, it is preferable to form a corresponding height difference only at the top of the outer edge of the cutter head body, with the remaining top surfaces remaining essentially flush, forming a continuous cutting surface.

[0015] Considering that it is difficult to process waste of significantly different sizes (such as small fruit pits and large vegetable leaves) at the same time by setting a single-height cutting tooth at the free end of two adjacent blade bodies, the free end of the blade body has a cutting protrusion extending radially outward along the blade disc. The area below the cutting protrusion at the free end of the blade body is the cutting notch of the blade body. The cutting protrusions of at least two adjacent blade bodies in the same blade body are staggered in the vertical direction.

[0016] As an improvement, the tops of the cutting protrusions of two adjacent cutter bodies located in the same cutter head body have a height difference. Cutting protrusions of different heights can target waste of different sizes, achieving simultaneous coarse and fine crushing.

[0017] As an improvement, the rotational connection structure between the cutter head body and the connecting member is configured such that: during the upward deflection of the cutter head body relative to the connecting member from its initial state, the cutter head body moves towards the center of the cutter disc relative to the connecting member; during the downward deflection of the cutter head body relative to the connecting member back to its initial state, the cutter head body moves away from the center of the cutter disc relative to the connecting member. When the cutter head body deflects downward (deepening into the grinding area), its rotation axis actively moves away from the center of the cutter disc, allowing the cutter head body to extend more fully into the vicinity of the grinding ring. Even if its installation position is relatively inward (to avoid interference from upward deflection), it can still form a tight and effective crushing fit with the cutting teeth on the grinding ring. The path of the cutter head body thrown towards the grinding ring under the action of rotational centrifugal force is more direct, with a greater impact force, significantly enhancing the cutting, grinding, and crushing effect on waste materials (especially fibrous materials). When encountering large or hard debris, the cutter head can deflect upwards to buffer and avoid it. At this time, its rotation axis moves towards the center of the cutter head. This adaptive dynamic inward-curving structure design ensures that within the maximum upward deflection angle of the cutter head, its outer edge trajectory remains within a safe zone, preventing hard collisions with the fixed grinding ring cutting teeth or jamming due to material blockage. This significantly reduces the possibility of jamming and improves operational reliability. The dynamic axis offset design between the cutter head and the connecting parts intelligently optimizes the working position (downward) and avoidance position (upward) of the cutter head. When the cutter head rotates, the cutter head automatically adjusts its effective working radius and posture according to the force applied, maximizing the utilization of the grinding ring's crushing area while perfectly avoiding interference risks. This results in high overall grinding efficiency and smooth operation of the cutter head assembly.

[0018] To simplify the rotational connection structure between the cutter head body and the connector, the second pin is fixed relative to the connector. A mounting hole is provided on the connecting end of the cutter head body for the second pin to pass through. The mounting hole is an oblong hole extending from the connecting end of the cutter head body towards its free end. An arc-shaped rib protruding towards the free end of the cutter head body is located on the inner wall of the mounting hole near the connecting end of the cutter head body. An arc-shaped groove is located on the outer peripheral wall of the second pin facing the center of the cutter disc, into which the arc-shaped rib is embedded. As the cutter head body rotates upward relative to the connector, the arc-shaped rib gradually disengages from the arc-shaped groove, thereby driving the cutter head body to move relative to the connector towards the center of the cutter disc. The arc-shaped groove of the second pin and the arc-shaped rib of the cutter head body together constitute the rotational connection structure between the cutter head body and the connector. The design employs a cam effect created by the interlocking (arc-shaped rib / arc-shaped groove) between the oblong hole and the second pin. When the cutter head body deflects upwards, the arc-shaped rib disengages from the arc-shaped groove, pushing the rotation center of the cutter head body towards the center. When the cutter head body deflects downwards, the arc-shaped rib re-enters the arc-shaped groove, causing the cutter head to return to its original position and move outwards, approaching the grinding ring as closely as possible, thus improving cutting efficiency. This geometric fit between the oblong hole and the second pin replaces a complex transmission mechanism, significantly reducing the failure rate.

[0019] If the second pin rotates, the arc-shaped rib and the arc-shaped groove will misalign, resulting in a loss of motion control function. To fix the second pin relative to the connecting piece, connecting holes are provided on both vertical plates of the U-shaped plate. The inner circumferential wall of each connecting hole has a positioning rib. This positioning rib can be engaged in the arc-shaped groove of the second pin, thereby restricting the second pin from rotating around its own axis. After the positioning rib on the U-shaped plate is engaged in the arc-shaped groove of the second pin, the circumferential rotation of the second pin is restricted, ensuring the reliability of the fixation between the second pin and the connecting plate.

[0020] To further improve the fit between the grinding ring and the cutter head and the cutter disc, and to enhance the cutting effect, the lower part of the grinding ring has comb-like teeth that extend vertically and are arranged sequentially along the circumference.

[0021] As an improvement, a cutting groove is formed between two adjacent comb-shaped teeth on the grinding ring. One side edge of the cutting groove extends vertically, while the other side edge extends obliquely downwards against the rotation direction of the cutter head. This cutting groove design can accelerate the discharge speed of waste materials during waste processing and reduce the probability of waste getting stuck in the cutting groove of the grinding ring when processing hard waste.

[0022] As an improvement, it also includes:

[0023] A cutting disc is located below the blade disc and can rotate with the blade disc. The outer periphery of the cutting disc has first cutting teeth.

[0024] A cutting ring assembly is located within and fixed relative to the grinding chamber. The cutting ring assembly includes a cutting ring surrounding the cutting disc. The inner circumferential wall of the cutting ring has a second cutting tooth extending radially inward. During the rotation of the cutting disc with the blade disc, the first cutting tooth and the second cutting tooth form a cutting engagement. By adding a fixed cutting ring with a second cutting tooth around the cutting disc, when the cutting disc rotates at high speed, the first cutting tooth on its outer circumference and the second cutting tooth on the inner wall of the cutting ring can form an effective cutting engagement, generating multi-directional shearing force. This effectively cuts fibrous waste materials passing downward through the gap between them, ensuring a good cutting effect. Furthermore, the three-dimensional cutting structure formed by the double cutting teeth (the first cutting tooth on the cutting disc and the second cutting tooth on the cutting ring) significantly extends the material residence time, allowing the material to be fully cut and crushed, effectively reducing the risk of sewer pipe blockage.

[0025] To ensure cutting effectiveness, the first and second cutting teeth partially overlap vertically while maintaining a gap in the same direction. This design of partial overlap with a gap enhances cutting synergy and allows the cut waste material to fall smoothly. As an improvement, to further optimize cutting performance, the vertical distance between the first and adjacent second cutting teeth is denoted as the first distance, and its value ranges from 1mm ≤ L ≤ 10mm.

[0026] As an improvement, the second cutting tooth is a vertically extending triangular tooth with a downward-sloping cutting surface at its top. The first cutting tooth is located above the cutting surface of the second cutting tooth. The vertical extension of the triangular tooth and the inclined cutting surface at its top effectively cuts falling waste material and guides it downwards. The first cutting teeth of the cutting disc are located above the inclined surface, forming a continuous cutting trajectory and ensuring cutting efficiency.

[0027] In some solutions, there may be one (or a group) of second cutting teeth on both the cutting disc and the cutting ring. However, considering that the processing capacity of a single-layer cutting structure is limited and cannot meet the high load requirements, in a preferred solution, there are multiple second cutting teeth arranged sequentially along the circumference of the cutting ring. Each second cutting tooth arranged sequentially along the circumference of the cutting ring is called a second cutting tooth group. There are at least two cutting discs arranged vertically. The cutting ring is provided with at least two second cutting tooth groups arranged vertically. Each second cutting tooth group and each cutting disc are arranged alternately in the vertical direction.

[0028] As an improvement, each of the second cutting teeth is integral with the main body of the cutting ring. This integrated structure enhances overall strength, reduces maintenance costs, and ensures long-term stable operation. To facilitate processing and improve cutting performance, the inner circumferential wall of the cutting ring has multiple radially protruding edges that extend vertically. These edges are arranged sequentially at intervals along the circumference of the cutting ring, and the second cutting teeth are formed on the inner edge of these protruding edges.

[0029] To achieve stable and reliable installation of the cutting ring, the cutting ring assembly further includes an upper washer and a lower washer stacked sequentially. The inner circumferential wall of the grinding chamber has a first annular mounting groove for placing the upper and lower washers. A second annular mounting groove for accommodating the cutting ring is provided on the inner circumferential wall of either the upper or lower washer, or on both the inner circumferential walls of the upper and lower washers. The upper edge and / or lower edge of the cutting ring has a first positioning slot. The inner wall of the second annular mounting groove has a first positioning block. The first positioning block can engage with the first positioning slot to restrict the cutting ring from rotating circumferentially relative to the upper or lower washer. Through the cooperation of the upper and lower washers, the corresponding positioning slots, and the positioning block, the cutting ring assembly is precisely installed and fixed, preventing circumferential rotation and improving equipment safety.

[0030] The technical solution adopted by this utility model to solve the second technical problem is: a garbage disposal unit, including a housing and a grinding device disposed in the housing, wherein the grinding device adopts the grinding device of the garbage disposal unit described above.

[0031] For the casing of garbage disposers, some high-end products adopt a two-color design process to enhance brand recognition, such as two-color injection molding or two-color spraying. This process requires multiple molding or spraying steps, leading to a complex production process and significantly increased costs. Furthermore, two-color spraying is prone to problems such as insufficient coating adhesion and difficulty in controlling color differences, and long-term use can result in fading or wear, affecting aesthetics. Two-color injection molding, on the other hand, requires high mold precision and has a long processing cycle, making it unsuitable for large-scale production. Therefore, to solve the above technical problems, the casing includes an inner shell and an outer shell fitted over the inner shell. The outer shell includes an upper shell and a lower shell arranged sequentially at intervals, with a gap reserved between the upper and lower shells in the vertical direction. The portion of the inner shell that is opposite to the inner shell within the gap is visible to the outside through the gap. Because the garbage disposer's casing uses a nested inner and outer shell structure with gaps between the upper and lower shell halves, when a two- or multi-color structure is required, these gaps are simply utilized to allow the visible portion of the inner shell to naturally form a second color band different from the outer shell. This eliminates the need for traditional two-color injection molding or color-separation spraying processes, directly reducing multiple molding steps and the investment in matching molds, significantly lowering production costs. Especially when applied to garbage disposers, since the color difference between the inner and outer shells is achieved through the material's own color rather than a coating, it effectively solves the color difference control and fading risks associated with existing two-color injection molding or color-separation spraying methods. This significantly extends the product's lifespan and enhances its market competitiveness.

[0032] To further facilitate the installation of the upper and lower shells, the outer diameter of the inner shell's peripheral wall gradually increases from bottom to top. Both the upper and lower shells move upwards relative to the inner shell and are fitted over it. This structural design allows both the upper and lower shells to be installed by moving upwards from the bottom of the inner shell, and during disassembly, they move downwards to detach from the bottom of the inner shell. The gradually widening design of the inner shell's peripheral wall, combined with the bottom-up fitting of the shell, simplifies the alignment process and improves assembly efficiency.

[0033] To further simplify the detachable installation structure between the upper shell, lower shell, and inner shell, the inner wall of the upper shell has an inwardly protruding buckle, and the outer wall of the inner shell has an inverted L-shaped limiting groove. The upper shell and the inner shell are rotated and limited by sliding in the limiting groove through the buckle. The part of the inner shell that connects with the bottom wall is called the lower circumferential wall of the inner shell. The outer diameter of the lower circumferential wall of the inner shell is smaller than the outer diameter of the main body of the inner shell, thus forming a limiting step. The lower port of the lower shell has an inwardly extending annular flange. The annular flange abuts against the limiting step and is connected by fasteners.

[0034] Compared with the prior art, the advantages of this utility model are as follows: The cutting notch of the blade body extends to its bottom surface, and the protruding teeth of the grinding ring can pass through the notch to form a cutting engagement with the blade body. Since the cutting notch extends through the bottom surface to form an open channel, when the protruding teeth cut the material through the notch, the crushed waste particles (including fibrous materials) can fall directly down to the bottom of the cutter disc through the notch, avoiding the material being carried by the blade body and remaining on the upper part of the cutter disc. This effectively solves the bottleneck problem of poor material feeding in the prior art and significantly reduces the risk of blockage. On the other hand, the engagement between the protruding teeth of the grinding ring and the cutting notch of the blade body not only enhances the cutting efficiency but also promotes the immediate discharge of the material after crushing, shortening the residence time of the material in the grinding chamber, thereby effectively improving the overall processing efficiency. Especially for easily entangled fibrous waste, this design can effectively prevent accumulation, ensure fast and continuous feeding, and reduce the problem of machine jamming caused by material blockage in the grinding device of the waste processor. Attached Figure Description

[0035] Figure 1 This is a vertical sectional perspective view of the garbage disposal unit according to an embodiment of the present utility model, omitting the outer shell of the grinding chamber of the garbage disposal unit;

[0036] Figure 2 This is a three-dimensional structural diagram of the cutter head assembly according to an embodiment of the present utility model, with the cutter head body in its initial state;

[0037] Figure 3 This is an exploded view of the cutter head assembly according to an embodiment of the present utility model;

[0038] Figure 4 This is a front view of the cutter head assembly according to an embodiment of the present utility model;

[0039] Figure 5 This is a three-dimensional structural diagram of the cutter head assembly according to an embodiment of the present utility model, with the cutter head body in a state of being deflected upward at a certain angle;

[0040] Figure 6 This is an axial sectional view of the cutter head assembly according to an embodiment of the present utility model, with the cutter head body in its initial state;

[0041] Figure 7 This is an axial cross-sectional view of the cutter head assembly according to an embodiment of the present utility model, with the cutter head body in a state of being deflected upward at a certain angle;

[0042] Figure 8 This is a three-dimensional structural diagram of a cutter disc assembly according to another embodiment of the present invention. The first cutting tooth of the uppermost cutting disc is inclined downward.

[0043] Figure 9 for Figure 1 Enlarged view of point A in the image;

[0044] Figure 10 This is a partial cross-sectional view of the grinding device of the garbage disposer according to an embodiment of the present utility model, with the cutting plane passing through the axis of the drive motor;

[0045] Figure 11 A three-dimensional structural diagram of the grinding device of the garbage disposer according to an embodiment of the present utility model, omitting the upper cavity;

[0046] Figure 12 for Figure 11 A schematic diagram of the three-dimensional structure after omitting the cutter head assembly;

[0047] Figure 13 for Figure 12 An exploded view of the portion shown;

[0048] Figure 14 This is a three-dimensional structural diagram of the cutting ring according to an embodiment of the present utility model;

[0049] Figure 15 This is a three-dimensional structural diagram of the upper washer according to an embodiment of the present utility model. Detailed Implementation

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0051] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0052] Figures 1-15This invention illustrates the grinding device of a garbage disposal unit and a preferred embodiment of the garbage disposal unit. The garbage disposal unit includes a housing, a grinding chamber 10, and a grinding device, with the grinding chamber 10 located within the housing. The grinding device includes a drive motor 3, a grinding ring 26, a cutter disc assembly 2, a cutting disc assembly, and a cutting ring assembly. The grinding chamber 10 includes an upper chamber 11 and a lower chamber 12 that are interlocked. The bottom of the upper chamber 11 is open, and the top of the lower chamber 12 is open. The drive motor 3 is located below the lower chamber 12, and its output shaft passes through the bottom wall of the lower chamber 12 and extends into the interior of the grinding chamber 10, connecting to the cutter disc assembly 2 and driving the cutter disc assembly 2 to rotate. The cutter disc assembly 2 includes a cutter disc 20 and a cutter head body located on top of the cutter disc 20 for crushing garbage materials. A cutting disc assembly is coaxially fixed below the cutter disc 20 and can rotate with the cutter disc 20. The cutting disc assembly can consist of a single cutting disc 21 or at least two cutting discs 21 spaced apart vertically. Multiple first cutting teeth 211 are evenly distributed along the outer periphery of the cutting disc 21. These first cutting teeth 211 can be triangular serrations, substantially on the same plane as the main body of the cutting disc 21; alternatively, they can be inclined upwards or downwards relative to the main body of the cutting disc 21. This embodiment shows a cutting disc assembly with three cutting discs 21 arranged vertically at intervals. For example... Figure 8 As shown, some of the first cutting teeth 211 on the uppermost cutting disc 21 are inclined downwards. The first cutting teeth 211 of the cutting disc 21 can effectively cut fibrous waste materials passing downwards through the periphery of the cutting disc 20, ensuring the cutting effect.

[0053] See Figure 1 and Figure 7 The grinding ring 26 is positioned on the outside of the cutter head assembly 2. Specifically, the bottom edge of the grinding ring 26 is at approximately the same height as the cutter head 20. That is, the grinding ring 26 extends upwards by a relatively long distance relative to the top surface of the cutter head 20, thereby allowing the waste material struck and driven by the cutter head assembly 2 to return to the top of the cutter head 20. The outer peripheral wall of the cutter head 20 is basically in contact with the inner peripheral wall of the grinding chamber 10, thus ensuring the secure fixing of the grinding ring 26.

[0054] The lower part of the grinding ring 26 has vertically extending comb-like teeth 261 arranged sequentially along the circumference. A cutting groove 262 is formed between two adjacent comb-like teeth 261 on the grinding ring 26. One side edge of the cutting groove 262 extends vertically, while the other side edge extends obliquely from top to bottom in the opposite direction to the rotation direction of the cutter head 20. In a preferred embodiment, along the rotation direction of the cutter head 20, the front side edge of the cutting groove 262 extends vertically, while the rear side edge extends obliquely from top to bottom against the rotation direction of the cutter head 20, forming an angle of approximately 94° with the horizontal direction. This design of the cutting groove 262 can accelerate the discharge speed of waste materials during waste processing and reduce the probability of waste getting stuck in the cutting groove 262 of the grinding ring 26 when processing hard waste. The lower part of the grinding ring 26 also has inwardly protruding teeth 260, and there are multiple teeth 260 arranged at intervals along the circumference of the grinding ring 26. This embodiment shows five teeth 260.

[0055] See Figures 2-5 The cutter head body includes a disc-shaped cutter head 20 and at least two sets of cutter head bodies disposed on its top (in this embodiment, two sets of symmetrically arranged cutter head bodies are used as an example). The cutter head 20 is driven to rotate by a drive motor 3. Its outer periphery is provided with upwardly inclined flanged teeth 201 and radially inwardly recessed cutting notches 202. The flanged teeth 201 and the cutting notches 202 can achieve cutting engagement with the comb-shaped teeth 261 and convex teeth 260 on the outer grinding ring 26. Multiple discharge holes 203 and pressure discharge holes 204 are opened on the surface of the cutter head 20. The number and opening size of the discharge holes 203 and pressure discharge holes 204 can be reasonably selected according to the actual volume and processing capacity of the grinding chamber 10.

[0056] The cutter head body includes a connector 23 and a cutter head body 24. The connector 23 includes a horizontally arranged connecting plate 231 and a sideways U-shaped plate 232. The U-shaped plate 232 includes two vertical plates spaced a certain distance apart in the horizontal direction. A first pin 251 vertically passes through the connecting plate 231 and is connected to the cutter head 20, thereby allowing the cutter head body to rotate with the first pin 251 as the rotation center line. A second pin 252 is provided between the two vertical plates of the U-shaped plate 232. The two ends of the second pin 252 are fixed relative to the vertical plates, that is, they cannot rotate around their own axis. Specifically, the vertical plates have connecting holes 2320 for the two ends of the second pin 252 to pass through, and the inner wall of the connecting holes 2320 is provided with radially inwardly protruding positioning ribs 2321. The outer peripheral wall of the second pin 252 is provided with an arc-shaped groove 2520 at the corresponding position. The shape of the arc-shaped groove 2520 is adapted to the positioning rib 2321. When the second pin 252 is inserted into the connecting hole 2320 of the U-shaped plate 232 along the axial direction, the positioning rib 2321 is engaged in the arc-shaped groove 2520, which can lock the second pin 252 from rotating.

[0057] The cutter head body 24 has a connecting end 241 for connecting to the connector 23 and a free end 242 that is away from the connector 23. This can also be understood as the free end 242 of the cutter head body 24 being closer to the grinding ring 26 than the connecting end 241. The connecting ends 241 of the cutter head body 24 are all located within the U-shaped plate 232 and connected to the second pin 252. In some embodiments, the connecting ends 241 of the cutter head body 24 have mounting holes 243 through which the second pin 252 passes. The mounting holes 243 are waist-shaped holes extending from the connecting ends 241 of the cutter head body 24 towards the side where its free end 242 is located. The inner wall of the mounting holes 243 has an arc-shaped rib 2430 protruding towards the free end 242 of the cutter head body 24 on the side adjacent to the connecting ends 241. This arc-shaped rib 2430 can be embedded in the arc-shaped groove 2520 of the second pin 252. As the cutter head body 24 deflects upward relative to the connecting member 23 from its initial state, the arc-shaped protrusion 2430 of the cutter head body 24 gradually disengages from the arc-shaped groove 2520, thereby driving the cutter head body 24 as a whole to move relative to the connecting member 23 toward the center of the cutter disc 20 (see details). Figure 7 (M direction shown). The arc-shaped groove 2520 of the second pin 252 and the arc-shaped rib 2430 of the cutter body 24 together constitute the rotational connection structure between the cutter body 24 and the connector 23 in this embodiment. A cam effect is created by the (arc-shaped rib 2430 / arc-shaped groove 2520) fit between the waist-shaped hole and the second pin 252. When the cutter body 24 deflects upward from its initial state, the arc-shaped rib 2430 disengages from the arc-shaped groove 2520, pushing the rotation center of the cutter body 24 towards the center. During the downward deflection of the cutter body 24 back to its initial state, the arc-shaped rib 2430 re-enters the arc-shaped groove 2520, and the cutter body 24 resets and moves outward, approaching the grinding ring 26 as close as possible to improve cutting efficiency. The geometric fit between the waist-shaped hole and the second pin 252 replaces a complex transmission mechanism, significantly reducing the failure rate.

[0058] In this embodiment, the bottom wall of the cutter head body 24 is a plane. Under its own weight, the bottom wall of the cutter head body 24 is in contact with the top surface of the cutter disc 20. This state is the "initial state" mentioned above.

[0059] In this embodiment, when the cutter head body 24 deflects downward (deepening into the grinding area), its rotation axis actively moves away from the center of the cutter disc 20. This allows the cutter head body 24 to extend more fully into the vicinity of the grinding ring 26. Even though its installation position is relatively inward (to avoid interference from upward deflection), it can still form a tight and effective crushing fit with the protrusions 260 on the grinding ring 26. Under the action of centrifugal force, the path of the cutter head body 24 towards the grinding ring 26 is more direct, resulting in a greater impact force and significantly enhanced cutting, grinding, and crushing effects on waste materials (especially fibrous materials). When encountering large or hard waste impacts, the cutter head body 24 can deflect upward to buffer and avoid it. At this time, its rotation axis will move towards the center of the cutter disc 20. This adaptive dynamic inward-retracting structural design ensures that within the maximum upward deflection angle range of the cutter head body 24, its outer edge trajectory is always within the safe area, preventing hard collisions with the protrusions 260 of the externally fixed grinding ring 26 or jamming due to material blockage. This greatly reduces the possibility of jamming and improves operational reliability. The dynamic axis offset design between the cutter head body 24 and the connecting member 23 of this utility model realizes intelligent optimization of the working position (downward) and avoidance position (upward) of the cutter head body 24. When the cutter head 20 rotates, the cutter head body 24 can automatically adjust its effective working radius and posture according to the force. While maximizing the use of the crushing area space of the grinding ring 26, it also perfectly avoids the risk of interference, making the overall grinding efficiency of the cutter head assembly 2 high and the operation smooth.

[0060] Each set of cutter heads can have one cutter head body 24 or at least two cutter head bodies 24, wherein each cutter head body 24 is connected to the same connector 23, as shown in this embodiment, where two cutter head bodies 24 are arranged side by side. The connecting end 241 of the two cutter head bodies 24 is located within the receiving space of the U-shaped plate 232 of the connector 23 and is connected to the same second pin 252. The mounting shaft holes 243 of the connecting end 241 of the two cutter head bodies 24 have basically the same structure and can both achieve radial offset during vertical deflection. Each cutter head body 24 can independently deflect vertically around the second pin 252 in a plane perpendicular to the surface of the cutter disc 20 (e.g., the deflection angle range is, for example, 0-90 degrees).

[0061] The operation of the cutter head body in this embodiment is as follows: The drive motor 3 drives the cutter disc 20 to rotate at high speed. When food waste falls onto the surface of the cutter disc 20, the connecting piece 23 is subjected to centrifugal force and the impact of the waste, and swings around the first pin 251 in the horizontal plane; each cutter head body 24 can independently deflect up and down around the second pin 252 under the impact of the waste. When encountering hard objects (such as bones), it avoids upward to reduce the impact, and when encountering flexible objects (such as fibers), it presses downward to enhance the pulling force. Among them, the two parallel cutter head bodies 24 move independently, forming dense impact points and cutting lines, which significantly improves the initial crushing efficiency of the waste.

[0062] The free ends 242 of the two cutter heads 24 of the same cutter head assembly 2 are somewhat different. Specifically, the height distribution of the free ends 242 of the cutter head 24 is staggered to enhance the crushing gradient and reduce clogging. Figure 4 As shown, the overall height of the two side-by-side cutter heads 24 in the same set of cutter heads (from the top surface of the connecting end 241 to the top surface of the free end 242) gradually increases from the inside to the outside along the radial direction of the cutter head 20. Based on this, there is a certain height difference between the highest points of the top surfaces of the two cutter heads 24, thus, even in the initial state, a stepped crushing structure is formed at the top surfaces of the two cutter heads 24.

[0063] In this embodiment, the end of the cutter head body adjacent to the grinding ring 26 has a cutting notch 245. The cutting notch 245 extends to the bottom surface of the cutter head body. During the rotation of the cutter head body with the cutter disc 20, the protruding teeth 260 of the grinding ring 26 can pass through the cutting notch 245 of the cutter head body and form a cutting engagement with the portion above the cutting notch 245 of the cutter head body.

[0064] Both cutter head bodies 24 have a cutting protrusion 244 (e.g., a trapezoidal or triangular carbide tip) protruding radially outward along the cutter disc 20 on their free ends 242. Within the same set of cutter head bodies, the cutting protrusions 244 of the two cutter head bodies 24 are staggered vertically. Specifically, the top heights of the cutting protrusions 244 of the two cutter head bodies 24 are different, meaning that the cutting protrusions 244 of the cutter head bodies 24 also form a corresponding stepped crushing structure at their top positions. When the cutter disc 20 rotates, the cutting protrusions 244 of the cutter head bodies 24 revolve with the cutter disc 20, and the cutting protrusions 244 of the cutter head bodies 24 form an interlaced shearing motion with the protruding teeth 260 and comb-like teeth 261 on the grinding ring 26, cutting the waste.

[0065] The area located below the cutting protrusion 244 at the free end 242 of the aforementioned cutter head body 24 is the cutting notch 245 of the cutter head body in this embodiment.

[0066] In this embodiment, multiple cutter heads 24 (at least two) share a single connector 23 and are uniformly rotatably mounted on the cutter disc 20 via a first pin 251 on the connector 23. Compared to the traditional mode of "one cutter head with one independent connecting base" in the prior art, this significantly reduces the number of independent mounting bases (connectors 23) required on the cutter disc 20, thus saving valuable mounting space on the cutter disc 20. On the other hand, thanks to the aforementioned optimization of space occupancy, more cutter heads can be deployed than in the traditional single-cutter-head, single-base scheme, while the area of ​​the cutter disc 20 remains unchanged or is limited. The entire cutter disc assembly 2 has a denser density of cutting, impact, and grinding points. Based on this, the independent multi-degree-of-freedom motion capability of each cutter head 24 is superimposed, which greatly improves the frequency, intensity, and coverage of the impact, cutting, and grinding effects on the material per unit time, maximizing the crushing capacity of the cutter disc assembly 2 within a limited space. Furthermore, although each cutter head body 24 in this embodiment is connected to the same connector 23, it can independently deflect up and down relative to the connector 23, thus having stronger material adaptability and more efficient crushing ability (such as pulling on fibrous materials, avoiding and impacting hard objects).

[0067] The grinding device in this embodiment employs a dynamic axis offset cutter head (the cutter head body 24 can deflect radially while rotating vertically), multiple cutter head bodies 24 sharing a common base for independent deflection (at least two cutter head bodies 24 are arranged side by side), and a through-cutting notch 245 with shearing engagement of protruding teeth 260. These three elements constitute a deeply coupled and mutually synergistic overall technical solution. Specifically, the structural design of the dynamic axis offset cutter head and the multiple cutter head bodies 24 sharing a common base provides powerful crushing capabilities (more densely packed cutters, a wider effective working radius, and independent deflection adaptable to materials of different properties), enabling the generation of a large amount of crushed material. Furthermore, the through-cutting notch 245 design provides an efficient discharge channel, allowing crushed material (especially fibers) to be discharged directly downwards through the outer gap of the cutter disc 20, avoiding accumulation above the cutter disc 20. Considering the increased crushing capacity, more and faster material output is inevitable. If the discharge is not smooth, it will exacerbate blockage and cause serious jamming problems. The through-cutting notch 245 design provides a "nearest, vertically downward" unobstructed outlet for these rapidly generated crushed materials. The above three points form a highly efficient closed loop. After being efficiently cut / ground, the material can be discharged immediately, significantly shortening the residence time of the material in the upper part of the grinding chamber and completely breaking the vicious cycle of "higher crushing efficiency leading to easier material blockage." Especially for easily entangled fibrous materials, the combination of multi-blade pulling and cutting, the powerful impact of the blades deflecting vertically into the grinding zone, and the immediate discharge through the 245° cutting notch produces an ultimate effect of "fiber breaking, anti-entanglement, and anti-blocking." The combined effect of these three points also comprehensively improves and balances the entire grinding device's ability to handle complex mixed waste (including hard bones, fruit pits, fibers, and soft kitchen waste). Whether it's hard objects requiring powerful crushing, fibers requiring pulling and cutting, or slurries requiring rapid discharge, the system can efficiently process them through the adaptive movement of the blades, dense crushing and cutting points, and unobstructed discharge channels, greatly reducing the risk of efficiency decline or downtime due to the complexity of the material types.

[0068] See Figure 1 as well as Figures 9-15 The cutting ring assembly is located on the periphery of the cutting disc assembly, specifically fixed relative to the side wall of the grinding chamber 10. The cutting ring assembly includes a cutting ring 4, an upper washer 41, and a lower washer 42. The cutting ring 4 is a ring with equal upper and lower diameters. The inner circumferential wall of the cutting ring 4 is provided with a second cutting tooth 401 extending radially inward. The second cutting tooth 401 is a vertically extending triangular tooth, with its top forming a downward-sloping cutting bevel 4010 from the outside to the inside, and its bottom forming a horizontally extending cutting surface.

[0069] A first annular mounting groove 120 is formed on the inner peripheral wall of the lower cavity 12 of the grinding chamber 10. The first annular mounting groove 120 extends upward to the top surface of the lower cavity 12, thus forming an opening at the top. The upper washer 41 and the lower washer 42 of the cutting ring assembly are stacked one on top of the other in the first annular mounting groove 120. After the upper cavity 11 is fastened onto the lower cavity 12, the upper washer 41 and the lower washer 42 are pressed downward. To prevent the cutting ring assembly from rotating circumferentially, the outer peripheral walls of the upper and lower washers 42 are each provided with a vertically extending second positioning groove 44. The inner wall of the first annular mounting groove 120 has a second positioning block 121 that protrudes radially outward. The second positioning block 121 is a matching vertically extending protrusion that can be inserted into the second positioning groove 44 to restrict the circumferential rotation of the upper washer 41 and the lower washer 42.

[0070] In this embodiment, the inner peripheral walls of the upper washer 41 and the lower washer 42 are further provided with second annular mounting grooves 43 for accommodating the cutting ring 4. The second annular mounting grooves 43 on the inner peripheral walls of the upper washer 41 and the lower washer 42 are vertically opposite each other. The upper edge and / or lower edge of the cutting ring 4 have a first positioning groove 402. The inner wall of the second annular mounting groove 43 has a first positioning block 411 protruding outward at a position corresponding to the first positioning groove 402. The first positioning block 411 can be engaged in the first positioning groove 402 of the cutting ring 4 to restrict the cutting ring 4 from rotating circumferentially relative to the upper washer 41 or the lower washer 42.

[0071] In some embodiments, both the cutting disc 21 and the cutting ring 4 may have one (or a group) second cutting teeth 401. However, considering that the processing capacity of a single-layer cutting structure is limited and cannot meet high-load requirements, in a preferred embodiment, to improve the high-load processing capacity, a multi-layer cutting design is adopted. Specifically, the cutting disc 21 is configured with upper, middle, and lower layers, all of which rotate synchronously with the cutter disc 20. The inner wall of the cutting ring 4 is provided with two groups of second cutting teeth 401, one upper and one lower. Each second cutting tooth 401 arranged sequentially in the circumferential direction of the cutting ring 4 is referred to as a group of second cutting teeth 401. The upper and lower sets of second cutting teeth 401 and the first cutting teeth 211 of the three-layer cutting disc 21 are arranged alternately in the vertical direction. Specifically, each first cutting tooth 211 of the upper cutting disc 21 is located above each second cutting tooth 401 of the upper second cutting tooth 401 set, and each first cutting tooth 211 of the middle cutting disc 21 is located between each second cutting tooth 401 of the upper second cutting tooth 401 set and each second cutting tooth 401 of the lower second cutting tooth 401 set. Each second cutting tooth 401 of the cutting ring 4 is integrally designed with the main body of the cutting ring 4 to increase structural strength. Specifically, the inner wall of the cutting ring 4 is first machined with a radially inwardly protruding vertical flange 40, and the inner edge of the flange 40 is directly machined to form two second cutting teeth 401 spaced a certain distance apart, thereby ensuring the overall strength of the cutting ring 4, reducing the stamping process, and reducing costs. After the cutting ring assembly is installed in the grinding chamber 10, the first cutting tooth 211 corresponding to the cutting disc 21 is located above the cutting slope 4010 of the corresponding second cutting tooth 401 of the cutting ring 4. In order to cooperate with the lowermost cutting disc 21, a third cutting tooth 421 arranged in sequence in the circumferential direction is added to the lower part of the inner peripheral wall of the lower washer 42. Each third cutting tooth 421 is located below the first cutting tooth 211 of the lowermost cutting disc 21, and the two form a three-level cutting.

[0072] The size of the cutting ring 4 and the number of second cutting teeth 401 in each group of the cutting ring 401 in this embodiment can be designed according to the size of the grinding chamber 10. For a conventionally sized garbage disposal unit, the number of teeth in each group of second cutting teeth 401 of the cutting ring 4 can be designed to be around 72.

[0073] In this embodiment, the first cutting tooth 211 on the cutting disc 21 and the adjacent second cutting tooth 401 on the cutting ring 4 partially overlap in the vertical direction, maintaining a certain axial gap between them in the vertical direction. This axial gap is denoted as the first distance, and the value of the first distance ranges from 1mm ≤ first distance ≤ 10mm. The aforementioned first distance can refer to the distance between the first cutting tooth 211 and the adjacent second cutting tooth 401 above it, such as... Figure 10 The L1 shown is preferably 5mm; it can also refer to the distance between the first cutting tooth 211 and the adjacent second cutting tooth 401 below it, such as... Figure 10 The L2 shown in the figure has the following preferred value range: 1mm≤L2≤7mm, with the most preferred value being 2mm.

[0074] When the cutting disc 21 rotates with the blade disc 20, the first cutting tooth 211 of the rotating cutting disc 21 forms a relative shearing motion with the second cutting tooth 401 on the fixed cutting ring 4, generating a multi-directional cutting force on fibrous waste. Due to the design that the first cutting tooth 211 and the second cutting tooth 401 partially overlap in the vertical direction and retain a gap, the cutting coordination is enhanced, and the cut waste material can fall smoothly.

[0075] In this embodiment, a fixed cutting ring 4 with a second cutting tooth 401 is added around the cutting disc 21. When the cutting disc 21 rotates at high speed, the first cutting tooth 211 on its outer periphery and the second cutting tooth 401 on the inner wall of the fixed ring can form an effective cutting engagement, generating multi-directional shearing force, which can effectively cut fibrous waste materials passing downward through the gap between them, ensuring the cutting effect. On the other hand, the three-dimensional cutting structure formed by the double cutting teeth (the first cutting tooth 211 on the cutting disc 21 and the second cutting tooth 401 on the cutting ring 4) can significantly extend the material residence time, so that the material is fully cut and crushed, effectively reducing the risk of sewer pipe blockage.

Claims

1. A grinding device for a garbage disposal unit, comprising a grinding ring (26) located within a grinding chamber (10) of the garbage disposal unit and a blade assembly (2) rotatable relative to the grinding ring (26) by a drive motor (3), the blade assembly (2) comprising a blade (20) and a blade head body rotatably connected to the blade (20) about a vertically extending axis, characterized in that: The cutter head body has a cutting notch (245) at one end adjacent to the grinding ring (26), which extends to the bottom surface of the cutter head body. The grinding ring (26) has inwardly protruding teeth (260). During the rotation of the cutter head body with the cutter disc (20), the teeth (260) of the grinding ring (26) can pass through the cutting notch (245) of the cutter head body and form a cutting fit with the part above the cutting notch (245) of the cutter head body.

2. The grinding device of the garbage disposer according to claim 1, characterized in that: The cutter head body includes a connector (23) and a cutter head body (24). The connector (23) is rotatably connected to the cutter disc (20) via a vertically extending first pin (251). The cutter head body (24) is rotatably connected to the connector (23) in a manner that allows it to deflect up and down relative to the connector (23).

3. The grinding device of the garbage disposer according to claim 2, characterized in that: The cutter head body (24) has at least two arranged side by side, and each of the cutter head bodies (24) of the same cutter head body is rotatably connected to the same connector (23), and each can independently deflect up and down relative to the connector (23).

4. The grinding device of the garbage disposer according to claim 3, characterized in that: The connector (23) includes a horizontally extending connecting plate (231) and a U-shaped plate (232) connected to the end of the connecting plate (231). The U-shaped plate (232) includes two vertically extending and side-by-side vertical plates. A horizontally extending second pin (252) is provided between the two opposite vertical plates of the U-shaped plate (232). Each of the cutter heads (24) of the same cutter head body is rotatably connected to the second pin (252).

5. The grinding device of the garbage disposer according to claim 4, characterized in that: At least two adjacent cutter bodies (24) of the same cutter body have different top heights.

6. The grinding device of the garbage disposer according to claim 4, characterized in that: The cutter head body (24) has a connecting end (241) for connecting to the connector (23) and a free end (242) that is away from the connector (23). The connecting end (241) of each cutter head body (24) of the same cutter head body is located in the U-shaped plate (232) and connected to the second pin (252).

7. The grinding device of the garbage disposer according to claim 6, characterized in that: The highest region of the top surface of two adjacent cutter bodies (24) in the same cutter body has a height difference.

8. The grinding device of the garbage disposer according to claim 6, characterized in that: The free end (242) of the cutter head body (24) has a cutting protrusion (244) extending radially outward along the cutter disc (20). The area below the cutting protrusion (244) at the free end (242) of the cutter head body (24) is the cutting notch (245) of the cutter head body. The cutting protrusions (244) of at least two adjacent cutter head bodies (24) in the same cutter head body are staggered in the vertical direction.

9. The grinding device of the garbage disposer according to claim 8, characterized in that: The tops of the cutting protrusions (244) of two adjacent cutter bodies (24) located in the same cutter body have a height difference.

10. The grinding device of the garbage disposer according to any one of claims 4 to 9, characterized in that: The rotating connection structure between the cutter head body (24) and the connector (23) is configured such that: during the upward deflection of the cutter head body (24) relative to the connector (23), the cutter head body (24) moves from the initial state relative to the connector (23) toward the center of the cutter disc (20); during the downward deflection of the cutter head body (24) relative to the connector (23) back to the initial state, the cutter head body (24) moves away from the center of the cutter disc (20) relative to the connector (23).

11. The grinding device of the garbage disposer according to claim 8, characterized in that: The second pin (252) is fixed relative to the connector (23). A mounting hole (243) for the second pin (252) to pass through is provided on the connecting end (241) of the cutter head body (24). The mounting hole (243) is an oblong hole extending from the connecting end (241) of the cutter head body (24) towards its free end (242). An arc-shaped rib (2430) protruding towards the free end (242) of the cutter head body (24) is provided on the inner wall of the mounting hole (243) near the connecting end (241) of the cutter head body (24). The outer peripheral wall of the second pin (252) faces the cutter disc (2). One side of the center position of the cutter head (24) has an arc-shaped groove (2520) into which the arc-shaped rib (2430) is embedded. During the upward deflection of the cutter head body (24) relative to the connector (23), the arc-shaped rib (2430) gradually comes out of the arc-shaped groove (2520), thereby driving the cutter head body (24) to move towards the center of the cutter head (20) relative to the connector (23). The arc-shaped groove (2520) of the second pin (252) and the arc-shaped rib (2430) of the cutter head body (24) together constitute the rotational connection structure between the cutter head body (24) and the connector (23).

12. The grinding device of the garbage disposer according to claim 8, characterized in that: The two vertical plates of the U-shaped plate (232) are provided with connecting holes (2320). The inner peripheral wall of the connecting hole (2320) has a positioning rib (2321). The positioning rib (2321) can be inserted into the arc-shaped groove (2520) of the second pin (252), thereby restricting the second pin (252) from rotating around its own axis.

13. The grinding device of the garbage disposer according to claim 8, characterized in that: The lower part of the grinding ring (26) has comb-like teeth (261) that extend vertically and are arranged sequentially in the circumferential direction.

14. The grinding device of the garbage disposer according to claim 13, characterized in that: A cutting groove (262) is formed between two adjacent comb-shaped teeth (261) on the grinding ring (26). One of the two side edges of the cutting groove (262) extends vertically, and the other side edge extends obliquely from top to bottom in the opposite direction of rotation of the cutter head (20).

15. The grinding device of the garbage disposer according to any one of claims 1 to 9, characterized in that... Also includes: A cutting disc (21) is located below the cutter disc (20) and can rotate with the cutter disc (20). The outer periphery of the cutting disc (21) has a first cutting tooth (211). The cutting ring assembly is located inside the grinding cavity (10) and fixed relative to the grinding cavity (10). The cutting ring assembly includes a cutting ring (4) located around the cutting disk (21). The inner peripheral wall of the cutting ring (4) has a second cutting tooth (401) extending radially inward. During the rotation of the cutting disk (21) with the cutter disk (20), the first cutting tooth (211) and the second cutting tooth (401) form a cutting engagement.

16. The grinding device of the garbage disposer according to claim 15, characterized in that: The first cutting tooth (211) and the second cutting tooth (401) partially overlap in the vertical direction and have a gap in the vertical direction. The distance between the first cutting tooth (211) and the adjacent second cutting tooth (401) in the vertical direction is called the first distance. The value range of the first distance is: 1mm ≤ first distance ≤ 10mm.

17. The grinding device of the garbage disposer according to claim 15, characterized in that: The second cutting tooth (401) is a vertically extending triangular tooth with a cutting bevel (4010) at the top that slopes downward from the outside to the inside. The first cutting tooth (211) is located above the cutting bevel (4010) of the second cutting tooth (401).

18. The grinding device of the garbage disposer according to claim 15, characterized in that: The cutting ring (4) has a plurality of second cutting teeth (401) arranged sequentially along the circumference. Each second cutting tooth (401) arranged sequentially along the circumference of the cutting ring (4) is referred to as a group of second cutting teeth (401). The cutting disk (21) has at least two arranged vertically. The cutting ring (4) is provided with at least two groups of second cutting teeth (401) arranged vertically. Each group of second cutting teeth (401) and each cutting disk (21) are arranged alternately in the vertical direction.

19. The grinding device of the garbage disposer according to claim 18, characterized in that: The inner peripheral wall of the cutting ring (4) has a convex edge (40) that protrudes radially inward and extends vertically. There are multiple convex edges (40), and each convex edge (40) is arranged sequentially at intervals along the circumference of the cutting ring (4). The second cutting tooth (401) is formed on the inner edge of the convex edge (40).

20. The grinding device of the garbage disposer according to claim 15, characterized in that: The cutting ring assembly also includes an upper washer (41) and a lower washer (42) stacked sequentially. The inner peripheral wall of the grinding cavity (10) has a first annular mounting groove (120) for placing the upper washer (41) and the lower washer (42). The inner peripheral wall of the upper washer (41) or the inner peripheral wall of the lower washer (42) or the inner peripheral wall of both the upper washer (41) and the lower washer (42) is provided with a groove for placing the cutting ring (42). The second annular mounting groove (43) of the cutting ring (4) has a first positioning groove (914) opening (402) on the upper edge and / or lower edge, and a first positioning block (411) on the inner wall of the second annular mounting groove (43). The first positioning block (411) can be inserted into the first positioning groove (914) opening (402) to restrict the cutting ring (4) from rotating circumferentially relative to the upper washer (41) or lower washer (42).

21. A garbage disposal unit, comprising a housing and a grinding device disposed within the housing, characterized in that: The grinding device is the same as the grinding device of the garbage disposal unit according to any one of claims 1 to 20.

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