A portable grinder with an integrated support structure

Abstract

This utility model discloses a portable grinder with an integrated support structure, aiming to solve the technical problem of poor reliability under vibration or impact environments caused by the single circuit board support structure in existing technologies. This utility model includes an upper body, a lower body, and electrical and drive components disposed within the upper body. The electrical component includes a horizontally arranged circuit board, the bottom surface of which abuts against the upper end of the drive component, providing primary support for the circuit board. Simultaneously, the bottom of the upper body also has at least one support portion for auxiliary support and fixation of the circuit board. By combining the drive component and the structure of the machine body itself, this utility model constructs a multi-point collaborative support system, greatly improving the installation stability and vibration and impact resistance of the internal core components, while optimizing the internal space layout and enhancing the overall reliability of the product.

Description

Technical Field This utility model relates to the field of kitchen appliance technology, and in particular to a portable grinder with an integrated support structure. Background Technology Portable electric grinders are popular in the market due to their compact size and portability. They typically integrate core components such as a drive motor, control circuit board, and battery. Within this compact space, ensuring the secure and reliable installation of these components, especially the relatively fragile circuit board, is a crucial aspect of product design, directly impacting the product's durability and long-term operational reliability.

[0001] In existing technologies, a common approach is to fix the circuit board to one side of the machine body using independent slots or screw posts on the inner wall of the machine body, either at a single point or a simple two-point connection. While this simplistic support method achieves basic fixation, it inherently suffers from structural instability. When the grinder is operating, the high-speed rotation of the motor generates continuous vibrations, which are directly transmitted to the machine body and the circuit board. For circuit boards that rely solely on side fixation, the suspended portion is prone to resonance or slight displacement. Over time, this can lead to fatigue, loosening, or even detachment of the solder joints of electronic components on the board, affecting the product's electrical performance and lifespan. Furthermore, this simplistic support structure is particularly vulnerable to external impacts such as accidental drops or collisions. The impact force can easily concentrate on a few support points, potentially causing the support structure to break or the circuit board to be damaged. Utility Model Content The purpose of this invention is to provide a portable grinder with an integrated support structure, which aims to solve the technical problems of insufficient stability and poor reliability of the internal structure under vibration and impact environments caused by the single support method in the prior art.

[0002] This utility model is achieved through the following technical solution: A portable grinder with an integrated support structure includes an upper body that integrates electrical components and a drive component. A lower body is detachably connected to the bottom of the upper body. A grinding component coupled to the drive component is disposed in the lower body. The electrical component includes a horizontally arranged circuit board. The bottom surface of the circuit board abuts against the upper end of the drive component so that the drive component provides primary support for the circuit board. The bottom of the upper body is provided with at least one support part for auxiliary support and fixation of the circuit board.

[0003] As described above, the portable grinder with an integrated support structure includes a drive assembly comprising a geared motor mounted on the upper body. The upper end of the geared motor is provided with a connection terminal, which passes through the circuit board and is electrically connected thereto to position and limit the circuit board.

[0004] As described above, the portable grinder with an integrated support structure includes an upper housing, a mounting base connected to the lower part of the upper housing, a geared motor mounted on the mounting base, and at least one support portion extending upward from the bottom of the mounting base.

[0005] As described above, the portable grinder with an integrated support structure has a cylindrical support portion with a stepped portion at its upper end, and the circuit board has mating holes that match the stepped portion.

[0006] The portable grinder with an integrated support structure as described above has reinforcing ribs along the height direction of the support. The bottom of the reinforcing ribs is fixed to the bottom of the mounting base, and the upper end abuts against the bottom surface of the circuit board.

[0007] As described above, the portable grinder with an integrated support structure has a plurality of first connecting posts on the inner end face of the upper part of the upper housing, and a plurality of second connecting posts extending upward from the bottom of the mounting base that can dock with the first connecting posts. The first connecting posts and the second connecting posts are fixed by fasteners.

[0008] As described above, the portable grinder with an integrated support structure has multiple axial limiting parts along the lower inner wall of the upper housing, and multiple axial limiting grooves that cooperate with the axial limiting parts are opened on the periphery of the mounting base. Multiple vertical limiting parts that can abut against the bottom end face of the mounting base are also provided on the lower inner wall of the upper housing and above the axial limiting parts.

[0009] As described above, the portable grinder with an integrated support structure includes a feeding bin for feeding the material to be ground. The feeding bin is connected to the grinding assembly via the drive shaft of the geared motor. Multiple L-shaped grooves are provided along the upper periphery of the feeding bin. The bottom inner wall of the upper shell is provided with protrusions that correspond one-to-one with the multiple L-shaped grooves. The protrusions and the L-shaped grooves can be rotated and assembled.

[0010] As described above, the portable grinder with an integrated support structure further includes a grinding base fixedly connected to the bottom of the feeding hopper. The grinding assembly includes a grinding ring fixed to the grinding base, a grinding core that mates with the grinding ring, an output gap between the grinding ring and the grinding core for the material to be ground to pass through, and the grinding core being sleeved and fixed to the drive shaft of the reduction motor.

[0011] As described above, the portable grinder with an integrated support structure further includes a collection cover for collecting the ground material, which is interference-fitted to the lower part of the grinding base.

[0012] Compared with the prior art, the present invention has the following advantages: 1. This utility model abandons the traditional, single-point fixing method, utilizing a larger, more rigid drive component as the main support for the circuit board, while the support at the bottom of the upper body provides auxiliary support and fixation. This forms a stable, multi-point collaborative support system that effectively disperses vibration and impact loads, greatly improving the installation stability of the circuit board under complex working conditions, thereby ensuring the reliability and service life of the entire machine.

[0013] 2. This solution effectively utilizes the vertical space wasted in traditional designs by horizontally arranging the circuit board above the drive assembly and using the drive assembly itself for support. This layout not only allows for a slimmer and more compact chassis design but also makes internal wiring simpler and more direct, reducing assembly complexity.

[0014] 3. This integrated support structure simplifies a fixed task that originally required multiple independent parts and processes into a single design utilizing existing core components (drive assembly) and the body structure (support unit). This reduces the number of fasteners required, simplifies assembly steps, and improves the efficiency of mass production and product consistency. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of the utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0015] Figure 1 This is a three-dimensional illustration of the embodiment. Figure 1 ; Figure 2 This is a three-dimensional illustration of the embodiment. Figure 2 ; Figure 3 This is a schematic diagram of the exploded structure of this embodiment. Figure 1 ; Figure 4 This is a schematic diagram of the exploded structure of this embodiment. Figure 2 ; Figure 5 for Figure 2 Sectional view along line AA; Figure 6 for Figure 2 Sectional view along the BB line; Figure 7 This is a diagram showing the internal structure layout of the upper body in this embodiment; Figure 8 for Figure 7 A schematic diagram of the decomposition process; Figure 9 This is a three-dimensional schematic diagram of the mounting base in this embodiment; Figure 10 This is a three-dimensional schematic diagram of the feeding hopper in this embodiment; Figure 11 This is a three-dimensional schematic diagram of the upper body in this embodiment; Figure 12 This is a schematic diagram of the disassembled structure of the upper body in this embodiment. Figure 1 ; Figure 13 This is a schematic diagram of the disassembled structure of the upper body in this embodiment. Figure 2 ; Figure 14 This is a three-dimensional schematic diagram of the upper shell in this embodiment. Detailed Implementation To make the technical problems solved by this application, the technical solutions, and the beneficial effects clearer, this application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0016] Please see the appendix Figures 1 to 14 This embodiment provides a portable grinder with an integrated support structure. Existing portable grinders or similar products, while pursuing miniaturization, often face challenges in space utilization due to the layout of their internal components. In particular, internal electrical components such as circuit boards are typically fixed vertically to one side of the machine body. This layout not only occupies valuable radial space, making it difficult to make the product slimmer, but also may lead to complex wiring, and its installation stability is also tested under the vibration environment generated during operation. To overcome the shortcomings of the prior art, this embodiment proposes a novel internal component integration scheme.

[0017] Specifically, the portable grinder of this embodiment mainly includes an upper body 3 and a lower body 4 detachably connected to the bottom of the upper body 3. The upper body 3 mainly integrates an electrical component 1 that provides control and power to the entire machine, and a drive component 2 that provides the power source. The lower body 4 houses a grinding component 5 for grinding materials, which is coupled to the power output of the drive component 2 within the upper body 3. Addressing the problems caused by the vertical layout of circuit boards in existing technologies, the portable grinder of this embodiment adopts a horizontally integrated support structure for its internal components. Specifically, the electrical component 1 includes a horizontally arranged circuit board 11. This circuit board 11, unlike the vertical layout in existing technologies, is arranged horizontally above the drive component 2. Its bottom surface directly abuts against the upper end of the drive component 2, thereby enabling the larger and more rigid drive component 2 to provide stable main support for the circuit board 11. Meanwhile, to further ensure the stable installation of the circuit board 11, at least one support part 31 is provided at the bottom of the upper body 3. This support part 31 provides auxiliary support and final fixation for the circuit board 11. This novel approach, which changes the circuit board from vertical to horizontal and combines main and auxiliary supports, constitutes an extremely stable internal support system. In commonly used existing technologies, the circuit board inside the grinding machine is usually fixed to one side of the machine body by setting independent slots or screw posts on the inner wall of the machine body, using a single-point or simple two-point connection method. Although this simplified support method can achieve basic fixation, it has inherent defects in structural stability. When the grinding machine is working, the high-speed rotation of the motor will generate continuous vibration, which will be directly transmitted to the machine body and the circuit board. For circuit boards that rely solely on side fixation, the suspended parts are prone to resonance or slight displacement. Over time, this may lead to fatigue, loosening, or even detachment of the solder joints of electronic components on the board, thereby affecting the electrical performance and service life of the product. The support system in this embodiment fundamentally solves this problem. It not only greatly optimizes the vertical layout of the internal space and effectively utilizes the idle space above the drive components, but also simplifies the assembly process and significantly improves the structural reliability of the product under working vibration environment.

[0018] Furthermore, as an optional implementation, the drive assembly 2 is specifically a geared motor 21, which is vertically mounted inside the upper body 3. To achieve more precise positioning and limiting, the upper end of the geared motor 21 is provided with a connecting terminal 211. This connecting terminal 211 is not only an electrical component but also plays a crucial structural role. Corresponding electroplated through holes are provided on the circuit board 11, through which the connecting terminal 211 passes and is electrically connected to the circuit board 11, for example, by soldering or plugging. Through this through-hole connection, the connecting terminal 211 first acts as a mechanical positioning pin. Its rigidity and precise position provide accurate positioning and limiting for the circuit board 11. Tolerance matching prevents the circuit board 11 from moving or rotating in the horizontal plane, ensuring its relative position with the motor shaft and even the entire body remains unchanged. Subsequently, by wave soldering or manual soldering the terminal portion extending from the upper surface of the circuit board 11, a robust electrical connection is achieved, enabling the supply of power or transmission of control signals to the circuit board 11. The design of the connection terminal 211 cleverly integrates electrical connection and mechanical positioning functions into a single component, which not only eliminates the need for additional positioning pins or fasteners and reduces material costs, but also simplifies the original multiple assembly steps into one action, greatly improving production efficiency and the reliability of the final product.

[0019] Furthermore, as an optional implementation, to achieve modularity and convenient assembly of the above structure, and to fundamentally ensure the installation accuracy of the core moving components, the internal structure of the upper body 3 can be further optimized. In traditional manufacturing processes, the motor and various supporting components may need to be positioned and fixed separately to the inner wall of the main housing. This decentralized assembly method places high demands on tooling fixtures and is prone to cumulative tolerances, thereby affecting the final coaxiality and stability. To solve this problem, this solution provides a mounting base 33.

[0020] Specifically, the upper body 3 mainly consists of an outer upper shell 32 and a mounting base 33 serving as an internal skeleton. The mounting base 33 can be integrally molded from high-strength engineering plastics such as ABS using precision injection molding to ensure its complex spatial structure and dimensional stability. The geared motor 21 is not directly mounted to the upper shell 32, but is securely mounted to a pre-set motor mounting position on the mounting base 33 using screws or clips. Simultaneously, the support portion 31 used to provide auxiliary support for the circuit board 11 is not formed from the upper shell 32, but extends upwards integrally from the bottom of the mounting base 33 during injection molding.

[0021] Through this integrated design, all core components requiring high precision—including the mounting position of the geared motor 21 and multiple support parts 31—are integrated onto a single component, the mounting base 33. This means that their relative positional relationships are precisely fixed during the mold-making stage. In actual production, workers can pre-assemble the geared motor 21 and circuit board 11 onto the mounting base 33, forming a core module that can be assembled and tested independently. On the final assembly line, this core module is simply installed as a whole into the upper housing 32 in one go. This modular production method not only greatly simplifies the assembly process and reduces the precision requirements for worker operation, but also ensures the coaxiality and installation accuracy of the core components of the entire machine from the source, significantly improving product consistency and long-term operational reliability.

[0022] Furthermore, to improve the fitting accuracy and final fixing stability between the support portion 31 and the circuit board 11, the support portion 31 can be a cylindrical structure integrally injection molded with the mounting base 33, and a concentric stepped portion 311 with a small diameter and precise tolerances can be directly formed at its upper end using a mold. Correspondingly, mating holes 111 matching the outer diameter and positional tolerances of the stepped portion 311 are formed on the circuit board 11 using CNC drilling.

[0023] During assembly, the stepped portion 311 is first guided and embedded into the mating hole 111, forming a precise gap or transition fit between them. This not only provides excellent radial positioning, preventing minor movement of the circuit board 11 in the XY plane, but also the annular stepped surface formed at the root of the stepped portion 311 provides a precise Z-axis height reference for the circuit board 11. To achieve final locking and fixing, preferably, a screw hole is also pre-drilled on the central axis of the support portion 31. After the circuit board 11 is in place, a self-tapping screw or standard screw can be passed through the mating hole 111 from above and screwed into the screw hole to firmly fasten the circuit board 11 to the stepped surface.

[0024] Of course, the fixing method here is not limited to this. For scenarios that pursue higher production efficiency, a thermoplastic connection can also be used. That is, the stepped part 311 of the support part 31 is reserved with a longer length, and after passing through the circuit board 11, it is permanently fixed by thermoplastic riveting. In addition, using structural adhesive for bonding and fixing is also a feasible alternative.

[0025] Furthermore, to enhance the rigidity and bending strength of the slender support 31, especially when subjected to the screw tightening pressure from the circuit board 11 or the impact load of an accidental drop, this embodiment also incorporates a structural reinforcement design. Specifically, during the integral injection molding of the support 31, an integrally formed rectangular reinforcing rib 312 is provided along its radial sidewall and its entire height. This reinforcing rib 312 has a slender rectangular cross-section, its bottom seamlessly connected to the bottom of the mounting base 33, its entire length closely conforming to the outer wall of the support 31, and its upper end precisely abutting against the bottom surface of the circuit board 11. This reinforcing rib 312 significantly increases the moment of inertia of the support 31 in a specific direction, acting like a keel added to the cylindrical support 31, effectively resisting lateral bending moments that may occur during assembly or use, thereby preventing the support 31 from bending, tilting, or even breaking. Without increasing additional material costs or molding complexity, the reliability and durability of key support structures are significantly improved.

[0026] Furthermore, to ensure that the core module integrated in the mounting base 33 and the upper housing 32 maintain a stable and precise relative positional relationship under long-term use and vibration environments, a comprehensive multi-axial connection and limiting structure is set up between them. This structure provides comprehensive constraints on the mounting base 33 from three dimensions: axial fixation, circumferential anti-rotation, and vertical positioning.

[0027] Specifically, regarding axial fixation, multiple first connecting posts 321 with central threaded holes are integrally injection molded onto the inner end face of the upper housing 32, and second connecting posts 331 extend upward from the corresponding positions at the bottom of the mounting base 33 to fit against its end face. During assembly, standard fasteners (such as M2 or M3 pan head screws) pass through the through holes of the second connecting posts 331 and are screwed into the threaded holes of the first connecting posts 321, thereby firmly pulling the mounting base 33 upward and achieving the main axial locking fixation.

[0028] Meanwhile, to prevent the mounting base 33 from rotating due to the reverse torque generated when the geared motor 21 starts or stalls, a reliable circumferential limit is also provided. Specifically, multiple axial limiting parts 322, serving as positioning ribs, are axially arranged along the lower inner wall of the upper housing 32. Correspondingly, multiple axial limiting grooves 332 are formed on the peripheral outer wall of the mounting base 33, which precisely match the axial limiting parts 322 in shape, number, and position. During installation, the mounting base 33 slides axially into the upper housing 32, and a spline-like fit is formed between the axial limiting parts 322 and the axial limiting grooves 332, completely eliminating the possibility of relative rotation between them.

[0029] Finally, to ensure precise and consistent axial assembly depth of the mounting base 33, one or more vertical limiting parts 323 serving as positioning steps are provided above the axial limiting part 322 and on the inner wall of the upper housing 32. When the mounting base 33 is assembled in place, its bottom surface abuts against the top surface of these vertical limiting parts 323, forming a precise Z-axis hard limit. This combined limiting and fixing structure together ensures that the core module is accurately positioned, stably oriented, and reliably installed in the upper housing 32.

[0030] In summary, through axial threaded locking, circumferential keyway limiting, and vertical step positioning, this comprehensive connection and limiting structure together constitutes a three-dimensional locking system, ensuring that the core module remains stable and in a precise assembly state without shaking within the upper housing for a long period of time.

[0031] Furthermore, a quick-release, rotary, detachable assembly structure is adopted between the lower body 4 and the upper body 3. Specifically, the lower body 4 includes a feeding bin 41, which is injection molded from food-grade engineering plastic and serves as the main container body, for feeding ground materials such as coffee beans and pepper. On the upper outer peripheral wall of the feeding bin 41, at least two circumferentially distributed L-shaped grooves 411 are integrally molded. Correspondingly, on the bottom inner wall of the upper housing 32, radial protrusions 324 are also integrally molded, corresponding one-to-one in number and position to the plurality of L-shaped grooves 411.

[0032] During assembly, the user simply aligns the protrusion 324 of the upper body 3 with the vertical entrance section of the L-shaped groove 411 of the lower body 4 and presses it in place. Then, rotating it clockwise (or counterclockwise) by a small preset angle (e.g., 15 to 30 degrees), the protrusion 324 will slide into the transverse locking section of the L-shaped groove 411. Preferably, a small elastic locking point or ramp can be provided at the end of the transverse locking section. When rotated into place, the user can feel a clear damping sensation, which not only provides a sense of confirmation of operation but also effectively prevents the equipment from accidentally loosening during grinding vibration. Disassembly is simply a matter of reversing the operation. At the same time, the drive shaft 212 of the geared motor 21 passes coaxially from top to bottom through the central channel of the feeding bin 41 and extends downward. Its end is machined with a non-circular cross section (e.g., hexagonal or D-shaped cross section) to achieve reliable, slip-free torque transmission with the grinding assembly 5.

[0033] Furthermore, in order to achieve efficient and uniform grinding, the lower body 4 of this embodiment also includes a grinding seat 42 as a reference component of the grinding system. The grinding seat 42 can be fixed to the bottom of the feeding bin 41 by welding, threaded connection or snap-fit ​​connection.

[0034] The core components of the grinding assembly 5 are all mounted on the grinding base 42. Specifically, its structure includes a hollow grinding ring 51 as a stationary grinding element, which is made of a high-hardness material such as zirconia ceramic or high-chromium stainless steel and is firmly fixed on the grinding base 42. Simultaneously, there is a grinding core 52 as a rotating grinding element, made of the same or similar material as the grinding ring 51 to ensure wear resistance, and is disposed within the internal cavity of the grinding ring 51, coaxially engaging with it.

[0035] The inner wall of the grinding ring 51 and the outer wall of the grinding core 52 are both precision machined or molded with complex grinding teeth having multiple cutting edges. These form an annular output gap that gradually narrows from top to bottom, allowing the material to be ground to pass through. To achieve reliable torque transmission, the central hole of the grinding core 52 is machined into a non-circular cross-section, such as a hexagonal or square cross-section conforming to industrial standards, to form a non-slip polygonal fit with the end of the drive shaft 212 of the geared motor 21, thereby driving it to rotate at high speed. When the material falls from the feeding bin 41 into the grinding assembly 5, it is within this narrow space formed by the stationary grinding ring 51 and the rotating grinding core 52 that it is efficiently crushed into uniform particles through a combination of shearing, compression, and grinding.

[0036] Furthermore, the lower body 4 also includes a collection cover 43 for collecting the ground powder. This collection cover 43 is fixed to the lower part of the grinding seat 42 via an interference fit or a threaded connection, facilitating the user's access to the ground material. Its material can be common engineering plastics such as transparent polycarbonate (PC) or acrylonitrile-butadiene-styrene copolymer (ABS) to facilitate observation of the internal material quantity.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Those skilled in the art can make some modifications or alterations to the disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model, without departing from the scope of the present utility model's technical solution, shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A portable grinder with an integrated support structure, comprising an upper body (3) located at the top and integrating an electrical component (1) and a drive component (2), a lower body (4) detachably connected to the bottom of the upper body (3), and a grinding component (5) coupled to the drive component (2) disposed within the lower body (4), characterized in that, The electrical component (1) includes a horizontally arranged circuit board (11), the bottom surface of which abuts against the upper end of the drive component (2) so that the drive component (2) provides the main support for the circuit board (11). The bottom of the upper body (3) is provided with at least one support part (31) for auxiliary support and fixation of the circuit board (11).

2. The portable grinder with an integrated support structure according to claim 1, characterized in that, The drive assembly (2) includes a geared motor (21) mounted on the upper body (3). The upper end of the geared motor (21) is provided with a connection terminal (211). The connection terminal (211) passes through the circuit board (11) and is electrically connected to it to position and limit the circuit board (11).

3. The portable grinder with an integrated support structure according to claim 2, characterized in that, The upper body (3) includes an upper shell (32), and a mounting base (33) is connected to the lower part inside the upper shell (32). The geared motor (21) is mounted on the mounting base (33), and at least one support part (31) extends upward from the bottom of the mounting base (33).

4. The portable grinder with an integrated support structure according to claim 1, characterized in that, The support (31) is cylindrical, and the upper end of the support (31) has a stepped portion (311), and the circuit board (11) has a mating hole (111) that matches the stepped portion (311).

5. The portable grinder with an integrated support structure according to claim 3, characterized in that, A reinforcing rib (312) is provided along the height direction of the support (31). The bottom of the reinforcing rib (312) is fixed to the bottom of the mounting base (33), and the upper end abuts against the bottom surface of the circuit board (11).

6. The portable grinder with an integrated support structure according to claim 3, characterized in that, The upper inner end face of the upper housing (32) is provided with a plurality of first connecting posts (321), and the bottom of the mounting base (33) extends upward with a plurality of second connecting posts (331) that can be connected to the first connecting posts (321). The first connecting posts (321) and the second connecting posts (331) are fixed by fasteners.

7. The portable grinder with an integrated support structure according to claim 3, characterized in that, A plurality of axial limiting parts (322) are provided along the lower inner wall of the upper housing (32), and a plurality of axial limiting grooves (332) that cooperate with the axial limiting parts (322) are provided on the periphery of the mounting base (33). A plurality of vertical limiting parts (323) that can abut against the bottom end face of the mounting base (33) are also provided on the lower inner wall of the upper housing (32) and above the axial limiting parts (322).

8. The portable grinder with an integrated support structure according to claim 3, characterized in that, The lower body (4) includes a feeding bin (41) for feeding the material to be ground. The feeding bin (41) is connected to the grinding assembly (5) after being passed through by the drive shaft (212) of the geared motor (21). Multiple L-shaped grooves (411) are provided along the upper periphery of the feeding bin (41). The bottom inner wall of the upper shell (32) is provided with protrusions (324) that correspond one-to-one with the multiple L-shaped grooves (411). The protrusions (324) and the L-shaped grooves (411) can be rotated and assembled.

9. The portable grinder with an integrated support structure according to claim 8, characterized in that, The lower body (4) also includes a grinding seat (42) fixedly connected to the bottom of the feeding bin (41). The grinding assembly (5) includes a grinding ring (51) fixed on the grinding seat (42). The grinding ring (51) is provided with a grinding core (52) that cooperates with it. There is an output gap between the grinding ring (51) and the grinding core (52) for the material to be ground to pass through. The grinding core (52) is sleeved and fixed to the drive shaft (212) of the geared motor (21).

10. The portable grinder with an integrated support structure according to claim 9, characterized in that, The lower body (4) also includes a collection cover (43) for collecting the ground material, which is interference-connected to the lower part of the grinding seat (42).

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