Modular multi-precision replacement biological tissue grinding apparatus

Abstract

The application relates to the technical field of biological sample pretreatment, and discloses a modular multi-precision replacement biological tissue grinding device, which comprises a base mechanism, the inside of the base mechanism is provided with a modular grinding mechanism, the bottom of the modular grinding mechanism is installed with a fine grinding mechanism, the modular grinding mechanism comprises a differential drive component, the surface of the differential drive component is in contact with the surface of the base mechanism, the bottom of the differential drive component is provided with a multistage grinding component, the multistage grinding component comprises an end cover, a follow-up column is slidably connected to the inner wall of the end cover, a communication pipe is fixedly connected to the inner wall of the end cover, a grinding ball is fixedly connected to the bottom of the follow-up column, and the outer surface of the grinding ball is slidably connected with a limiting block. In the application, differential driving is used for realizing grading grinding, the upper part is used for carrying out orbiting and crushing coarse crushing on the tissue, and the lower part is used for completing fine grinding through a wall-clinging clamping structure.

Description

Technical Field

[0001] This invention relates to the field of biological sample pretreatment technology, and in particular to a modular, multi-precision replacement biological tissue grinding device. Background Technology

[0002] Biological tissue grinding is a core step in biological sample pretreatment and is widely used in molecular biology, pharmaceutical testing, food inspection, and agricultural and forestry research. Its main function is to break down and homogenize animal, plant, and microbial tissues, so as to fully release target substances such as nucleic acids, proteins, and enzymes within the cells, providing qualified samples for subsequent extraction, amplification, detection, and analysis. The stability, homogenization effect, and applicability of grinding equipment directly determine the sample activity retention rate, experimental data accuracy, and detection success rate, making it an indispensable key piece of equipment in life science experiments and sample testing processes.

[0003] Grinding equipment often uses a single vibration or stirring structure, which can easily cause slippage, idling, and incomplete crushing when dealing with wet tissues with high humidity. It also has a fixed grinding precision for samples and cannot quickly switch precision levels. Multiple types of samples require multiple devices to work together, and it is prone to jamming and wear when processing samples with large differences in hardness, making it difficult to ensure sample activity and grinding uniformity.

[0004] A search revealed Chinese Patent Publication No. CN209829119U, which discloses an adjustable biological tissue grinder, comprising: a base, side columns, positioning blocks, and a grinding dish. A motor support is located in the middle of the inner side of the side columns. A first motor is fixedly mounted on the upper end of the motor support. A first rotary shaft is coaxially mounted on the upper end of the first motor. A sliding block is rotatably connected to the outer ring of the first rotary shaft. A crossbeam is fixedly connected to the left side of the sliding block. A second motor is located inside the crossbeam. A second rotary shaft is coaxially mounted on the lower end of the second motor. Several fixed connecting blocks are evenly distributed at the lower end of the second rotary shaft, and grinding blocks are mounted through these fixed connecting blocks. The second rotary shaft drives the multiple layers of fixed connecting blocks and grinding blocks below to rotate, completing the grinding action inside the grinding dish. This structure enables multi-layer grinding of the material inside the grinding dish, with accurate positioning and improved grinding quality. The structure is ingeniously designed, the equipment is highly stable, and it has good practicality. However, this invention patent has obvious defects. It adopts a dual-motor discrete drive structure, and the transmission components are complicated and bulky. This not only increases the manufacturing cost of the equipment, but also makes it prone to problems such as asynchronous transmission and high failure rate. The grinding components do not have a modular quick-replacement structure, making disassembly and assembly cumbersome and the positioning accuracy difficult to maintain for a long time. It cannot adapt to the needs of rapid switching between multiple precision and multiple types of samples. Summary of the Invention

[0005] To overcome the above shortcomings, this invention provides a modular multi-precision replacement biological tissue grinding device, which aims to improve the existing technology that uses a dual-motor discrete drive structure, with complex and bulky transmission components, which not only increases the manufacturing cost of the equipment, but also easily leads to problems such as asynchronous transmission and high failure rate. Furthermore, the grinding components lack a modular quick-replacement structure, making disassembly and assembly cumbersome and positioning accuracy difficult to maintain over a long period of time, thus failing to meet the needs of rapid switching between multiple precision and multiple types of samples.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a modular multi-precision replacement biological tissue grinding device, comprising a matrix mechanism, wherein a modular grinding mechanism is provided inside the matrix mechanism, and a fine grinding mechanism is installed at the bottom of the modular grinding mechanism. The modular grinding mechanism includes a differential drive component, the surface of which is in contact with the surface of the matrix mechanism, and a multi-stage grinding component is provided at the bottom of the differential drive component. The multi-stage grinding component includes an end cap, a follower column slidably connected to the inner wall of the end cap, a connecting pipe fixedly connected to the inner wall of the end cap, a grinding ball fixedly connected to the bottom of the follower column, a limit block slidably connected to the outer surface of the grinding ball, and a rotating shaft fixedly connected to the inner wall of the limit block.

[0007] As a further description of the above technical solution: The base structure includes a body component, the top of which is provided with a module replacement component, and the inner wall of the body component is connected to the surface of the fine grinding mechanism.

[0008] As a further description of the above technical solution: The body component includes a housing, an inner wall of which is fixedly connected to a support cylinder, an inner wall of which is fixedly connected to a temperature control device, and an embedded groove is provided on the inner wall of the housing.

[0009] As a further description of the above technical solution: The module replacement component includes a docking push rod, the outer surface of which is fixed to the inner wall of the housing. A positioning frame is fixedly connected to the outer surface of the docking push rod, and a housing is fixedly connected to the end of the positioning frame. A drive motor is fixedly connected to the inner wall of the housing, and a drive shaft is fixedly connected to the end of the drive motor.

[0010] As a further description of the above technical solution: The differential drive component includes a top box, a positioning seat fixedly connected to the top of the top box, an inner wall of the positioning seat movably connected to the end of the docking push rod, a drive shaft rotatably connected to the inner wall of the top box, a drive wheel fixedly connected to the outer surface of the drive shaft, a planetary gear meshing with the outer surface of the drive wheel, a coupling fixedly connected to the inner wall of the planetary gear, a guide block rotatably connected to the end of the coupling, and a positioning disc rotatably connected to the outer surface of the coupling.

[0011] As a further description of the above technical solution: A turntable is fixedly connected to the outer surface of the drive shaft. The outer surface of the turntable rotates with the inner wall of the positioning plate. The outer surface of the guide block slides with the inner wall of the top box. The outer surface of the planetary gear meshes with the inner wall of the top box. The end of the drive shaft slides with the inner wall of the drive shaft.

[0012] As a further description of the above technical solution: The end cap is fixed to the bottom of the top box, and the end of the follower column is fixed to the end of the connecting shaft.

[0013] As a further description of the above technical solution: There are three connecting pipes, which are distributed on one side surface of the end cap, and the end of the rotating shaft is fixed to the end of the transmission shaft.

[0014] As a further description of the above technical solution: The fine grinding mechanism includes a container, a grinding shaft slidably connected to the inner wall of the container, a stirring arc plate fixedly connected to the outer surface of the grinding shaft, an arc groove formed on the surface of the stirring arc plate, a protective sleeve fixedly connected to the outer surface of the grinding shaft, an embedded post fixedly connected to the end of the grinding shaft, a tension spring sleeved on the outer surface of the embedded post, a limit magnetic block fixedly connected to the end of the embedded post, and a buffer pad fixedly connected to the outer surface of the limit magnetic block.

[0015] As a further description of the above technical solution: The inner wall of the protective sleeve is fixed to the outer surface of the rotating shaft. The outer surfaces of the embedded post and the limiting magnetic block slide against the inner wall of the rotating shaft. The end of the tension spring is fixed to the end of the rotating shaft. Two limiting magnetic blocks are provided and are respectively installed on the inner wall of the rotating shaft and the end of the embedded post. The polarity of the two limiting magnetic blocks is the same. The outer surface of the container is movably connected to the end of the top box and the inner wall of the support cylinder.

[0016] The present invention has the following beneficial effects: 1. In this invention, the equipment achieves graded grinding through differential drive. The upper part performs coarse crushing of the tissue by fixed track rolling, while the lower part completes fine grinding by using a wall-adhering clamping structure. The two-stage crushing works in synergy to solve the problems of tissue idling, slippage, and uneven crushing in wet grinding with high humidity. The wall-adhering grinding structure can forcibly clamp the tissue and stably scrape it.

[0017] 2. In this invention, the equipment is equipped with an elastic buffer and adaptive protection structure, which can effectively offset the mechanical impact and hard tissue collision stress during grinding, avoid rigid wear and jamming failure of components, greatly improve the stability and durability of equipment operation, and at the same time reduce the vibration and operating noise of the whole machine, optimize the laboratory operating environment, and avoid impact damage to the activity of biological samples.

[0018] 3. In this invention, the device adopts a follow-up modular replacement structure, which can quickly complete the switching and precise docking of grinding components of different precision. The drive components move synchronously with the positioning structure, improving the efficiency of module replacement and the accuracy of assembly positioning. Quick disassembly and assembly can be completed without the aid of tools, avoiding the problems of cumbersome replacement and large positioning deviation of traditional equipment. It can adapt to the grinding needs of various biological tissues, realize one machine for multiple uses, reduce laboratory equipment investment and space occupation, and improve the operational convenience and equipment versatility of sample pretreatment. Attached Figure Description

[0019] Figure 1 This is a front perspective view of a modular multi-precision replacement biological tissue grinding device proposed in this invention; Figure 2 This is a structural illustration of a modular, multi-precision replacement biological tissue grinding device proposed in this invention; Figure 3 This is a partial cross-sectional structural diagram of a modular multi-precision replacement biological tissue grinding device proposed in this invention; Figure 4 This is a cross-sectional view of the matrix structure in a modular multi-precision replacement biological tissue grinding device proposed in this invention; Figure 5 This is a schematic diagram of the modular grinding mechanism in a modular multi-precision replacement biological tissue grinding device proposed in this invention; Figure 6 This is a cross-sectional schematic diagram of the modular grinding mechanism in a modular multi-precision replacement biological tissue grinding device proposed in this invention. Figure 1 ; Figure 7 This is a partial cross-sectional schematic diagram of the modular grinding mechanism in a modular multi-precision replacement biological tissue grinding device proposed in this invention; Figure 8 This is a cross-sectional schematic diagram of the modular grinding mechanism in a modular multi-precision replacement biological tissue grinding device proposed in this invention.Figure 2 ; Figure 9 This is a partial structural diagram of a modular multi-precision replacement biological tissue grinding device proposed in this invention; Figure 10 For the present invention Figure 9 A magnified schematic diagram of part A in the diagram.

[0020] Legend: 1. Base structure; 11. Body components; 111. Housing; 112. Support cylinder; 113. Embedded groove; 12. Module replacement components; 121. Docking push rod; 122. Positioning frame; 123. Sleeve; 124. Drive motor; 125. Drive shaft; 2. Modular grinding mechanism; 21. Differential drive components; 211. Top box; 212. Positioning seat; 213. Transmission shaft; 214. Drive wheel; 215. Planetary gear; 216, guide block; 217, positioning plate; 22, multi-stage grinding component; 221, end cap; 222, connecting pipe; 223, follower column; 224, grinding ball; 225, rotating shaft; 226, limiting block; 3, fine grinding mechanism; 31, storage dish; 32, grinding shaft; 33, stirring arc plate; 34, arc groove; 35, embedded column; 36, limiting magnetic block; 37, buffer pad; 38, tension spring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see the appendix Figure 1 Appendix Figure 2 An embodiment of the present invention includes a base structure 1, a modular grinding mechanism 2 is provided inside the base structure 1, a fine grinding mechanism 3 is installed at the bottom of the modular grinding mechanism 2, the modular grinding mechanism 2 includes a differential drive component 21, the surface of the differential drive component 21 is in contact with the surface of the base structure 1, and a multi-stage grinding component 22 is provided at the bottom of the differential drive component 21. The multi-stage grinding component 22 includes an end cap 221, a follower column 223 slidably connected to the inner wall of the end cap 221, a connecting pipe 222 fixedly connected to the inner wall of the end cap 221, a grinding ball 224 fixedly connected to the bottom of the follower column 223, a limit block 226 slidably connected to the outer surface of the grinding ball 224, and a rotating shaft 225 fixedly connected to the inner wall of the limit block 226. Specifically, the base structure 1 provides support and installation foundation for the modular grinding mechanism 2 and the fine grinding mechanism 3. The differential drive component 21 of the modular grinding mechanism 2 supplies power to the multi-stage grinding component 22, driving the rotating shaft 225 to rotate. The limiting block 226 rotates synchronously with the rotating shaft 225 and constrains the movement trajectory of the grinding ball 224, so that the grinding ball 224, in a fixed track state, cooperates with the follower column 223 to crush the biological tissue. The connecting pipe 222 on the end cap 221 can transport liquid to adapt to high humidity grinding conditions. The crushed tissue falls into the fine grinding mechanism 3. Through the combination of differential transmission, limiting track and multi-stage crushing structure, efficient graded grinding of tissue is achieved, improving the crushing uniformity and stability.

[0023] Please see the appendix Figure 3 Appendix Figure 4 The base mechanism 1 includes a body component 11, a module replacement component 12 is provided on the top of the body component 11, the inner wall of the body component 11 is connected to the surface of the fine grinding mechanism 3, the body component 11 includes a box 111, a support cylinder 112 is fixedly connected to the inner wall of the box 111, a temperature control is fixedly connected to the inner wall of the support cylinder 112, and an embedded groove 113 is provided on the inner wall of the box 111. The module replacement component 12 includes a docking push rod 121, the outer surface of the docking push rod 121 is fixedly connected to the inner wall of the box 111, a positioning frame 122 is fixedly connected to the outer surface of the docking push rod 121, a sleeve 123 is fixedly connected to the end of the positioning frame 122, a drive motor 124 is fixedly connected to the inner wall of the sleeve 123, and a drive shaft 125 is fixedly connected to the end of the drive motor 124. Specifically, the housing 111 of the body component 11 serves as the overall support carrier, and the support cylinder 112 on its inner wall supports and fixes the fine grinding mechanism 3. The temperature control device inside the support cylinder 112 provides a stable temperature control environment for the grinding process. The embedded groove 113 of the housing 111 realizes the assembly and positioning of the internal components. The docking push rod 121 of the module replacement component 12 drives the positioning frame 122, the housing 123, the drive motor 124 and the drive shaft 125 to move as a whole. The positioning frame 122 fixes the drive motor 124 and realizes follow-up synchronization. The drive motor 124 outputs stable power through the drive shaft 125, and all structures cooperate in coordination.

[0024] Please see the appendix Figure 5 To be continued Figure 10The differential drive component 21 includes a top box 211. A positioning seat 212 is fixedly connected to the top of the top box 211. The inner wall of the positioning seat 212 is movably connected to the end of the docking push rod 121. A drive shaft 213 is rotatably connected to the inner wall of the top box 211. A drive wheel 214 is fixedly connected to the outer surface of the drive shaft 213. A planetary gear 215 meshes with the outer surface of the drive wheel 214. A connecting shaft is fixedly connected to the inner wall of the planetary gear 215. A guide block 216 is rotatably connected to the end of the connecting shaft. A positioning disk 217 is rotatably connected to the outer surface of the shaft, and a turntable is fixedly connected to the outer surface of the drive shaft 213. The outer surface of the turntable rotates with the inner wall of the positioning disk 217. The outer surface of the guide block 216 slides with the inner wall of the top box 211. The outer surface of the planetary gear 215 meshes with the inner wall of the top box 211. The end of the drive shaft 213 slides with the inner wall of the drive shaft 125. The end of the end cover 221 is fixed to the bottom of the top box 211. The end of the follower column 223 is connected to the end of the connecting shaft. The fine grinding mechanism 3 includes a container 31, a grinding shaft 32 slidably connected to the inner wall of the container 31, a stirring arc plate 33 fixedly connected to the outer surface of the grinding shaft 32, an arc groove 34 formed on the surface of the stirring arc plate 33, a protective sleeve fixedly connected to the outer surface of the grinding shaft 32, a pin 35 fixedly connected to the end of the grinding shaft 32, a tension spring 38 sleeved on the outer surface of the pin 35, and a limit magnet 36 fixedly connected to the end of the pin 35. A buffer pad 37 is fixedly connected to the inner wall of the protective sleeve and the outer surface of the rotating shaft 225. The outer surfaces of the embedded post 35 and the limiting magnetic block 36 slide against the inner wall of the rotating shaft 225. The end of the tension spring 38 is fixed to the end of the rotating shaft 225. Two limiting magnetic blocks 36 are provided and are respectively installed on the inner wall of the rotating shaft 225 and the end of the embedded post 35. The two limiting magnetic blocks 36 have the same polarity. The outer surface of the container 31 is movably connected to the end of the top box 211 and the inner wall of the support cylinder 112.

[0025] Specifically, when the differential drive component 21 is running, the top box 211 is precisely positioned by the positioning seat 212 and the docking push rod 121. The drive shaft 125 drives the transmission shaft 213 to rotate. The transmission shaft 213 meshes with the planetary gear 215 through the drive wheel 214 to form a differential transmission. The planetary gear 215 drives the follower column 223 to rotate through the coupling shaft. The guide block 216 and the positioning plate 217 work together to constrain the transmission trajectory and ensure stable differential power output. In the fine grinding mechanism 3, the container 31 is fixed by the double positioning of the top box 211 and the support cylinder 112. The rotating shaft 225 drives the grinding shaft 32 and the stirring arc plate 33 to rotate synchronously. The arc groove 34 of the stirring arc plate 33 holds the structure to achieve forced fine grinding against the wall. The embedded column 35, the tension spring 38 and the same polarity limiting magnetic block 36 cooperate to form an elastic buffer structure to offset the grinding impact and maintain a stable wall-adhering force.

[0026] Working principle: When the equipment is working, the base mechanism 1 provides stable support and assembly foundation for the whole machine. The housing 111 of the machine body component 11 serves as the external carrier, and the internal support cylinder 112 stably supports the placing dish 31 of the fine grinding mechanism 3. The support cylinder 112 has a built-in temperature control to regulate the grinding environment temperature, adapting to the temperature control requirements of high humidity wet grinding. The embedded groove 113 of the housing 111 enables precise positioning and installation of internal components, ensuring stable operation of the whole machine. In the module replacement component 12, the docking push rod 121 can drive the positioning frame 122, the housing 123, the drive motor 124, and the drive shaft 125 to move as a whole. The positioning frame 122 fixes the drive motor 124 and implements... The two components move synchronously to ensure precise docking between the drive motor 124 and the modular grinding mechanism 2. The drive shaft 125 stably transmits power to the differential drive component 21, completing the rapid replacement and power docking of the grinding module. Inside the differential drive component 21, the top box 211 is movably connected to the docking push rod 121 via the positioning seat 212, enabling rapid positioning and assembly of the modular grinding mechanism 2. The drive shaft 125 drives the transmission shaft 213 to rotate, and the transmission shaft 213 drives the drive wheel 214 to rotate synchronously. The drive wheel 214 meshes with the planetary gear 215 and the tooth profile of the inner wall of the top box 211 to form a planetary differential transmission. The guide block 216 slides and stops along the inner wall of the top box 211. The rotating disk on the drive shaft 213 and the rotating disk on the positioning disk 217 cooperate to double-constrain the rotation trajectory of the planetary gear 215 and the connecting shaft, allowing the differential power to be output smoothly and accurately. In the multi-stage grinding component 22, the connecting shaft of the differential transmission drives the follower column 223 to rotate, and the follower column 223 drives the grinding ball 224 to rotate. The limiting block 226 limits the movement trajectory of the grinding ball 224, making it maintain a fixed orbit and perform preliminary crushing of biological tissue. The connecting pipe 222 on the end cap 221 can add liquid into the grinding chamber to meet the requirements of high humidity wet grinding. The coarsely crushed tissue falls into the storage dish 31. In the fine grinding mechanism 3, the drive shaft 213 synchronously drives the grinding ball 224 to rotate. The rotating shaft 225 rotates, and the rotating shaft 225 drives the stirring shaft 32 and the stirring arc plate 33 to rotate at high speed through the protective sleeve. The arc groove 34 on the surface of the stirring arc plate 33 can hold the tissue and prevent the tissue from slipping with the liquid flow in a high humidity environment, so as to achieve wall-mounted forced scraping fine grinding. The embedded post 35 at the end of the stirring shaft 32 slides with the inner wall of the rotating shaft 225. The tension spring 38 and the magnetic repulsion of two sets of same polarity limiting magnetic blocks 36 form an elastic buffer structure. The buffer pad 37 reduces the rigid collision wear between the limiting magnetic blocks 36, so that the stirring arc plate 33 always adheres to the inner wall of the container 31. It can adapt to tissue samples with large differences in softness and hardness, and effectively avoid jamming and overload damage to the components.

Claims

1. A modular, multi-precision replacement biological tissue grinding device, comprising a matrix mechanism (1), characterized in that: The base structure (1) is provided with a modular grinding mechanism (2), and a fine grinding mechanism (3) is installed at the bottom of the modular grinding mechanism (2). The modular grinding mechanism (2) includes a differential drive component (21), the surface of the differential drive component (21) is in contact with the surface of the base structure (1), and a multi-stage grinding component (22) is provided at the bottom of the differential drive component (21). The multi-stage grinding component (22) includes an end cap (221), a follower column (223) is slidably connected to the inner wall of the end cap (221), a connecting pipe (222) is fixedly connected to the inner wall of the end cap (221), a grinding ball (224) is fixedly connected to the bottom of the follower column (223), a limit block (226) is slidably connected to the outer surface of the grinding ball (224), and a rotating shaft (225) is fixedly connected to the inner wall of the limit block (226).

2. The modular multi-precision replacement biological tissue grinding device according to claim 1, characterized in that: The base structure (1) includes a body component (11), and a module replacement component (12) is provided on the top of the body component (11). The inner wall of the body component (11) is connected to the surface of the fine grinding mechanism (3).

3. The modular multi-precision replacement biological tissue grinding device according to claim 2, characterized in that: The body component (11) includes a box (111), the inner wall of the box (111) is fixedly connected to a support cylinder (112), the inner wall of the support cylinder (112) is fixedly connected to a temperature control device, and the inner wall of the box (111) is provided with an embedded groove (113).

4. The modular multi-precision replacement biological tissue grinding device according to claim 3, characterized in that: The module replacement component (12) includes a docking push rod (121), the outer surface of which is fixed to the inner wall of the housing (111), a positioning frame (122) is fixedly connected to the outer surface of the docking push rod (121), a housing (123) is fixedly connected to the end of the positioning frame (122), a drive motor (124) is fixedly connected to the inner wall of the housing (123), and a drive shaft (125) is fixedly connected to the end of the drive motor (124).

5. The modular multi-precision replacement biological tissue grinding device according to claim 4, characterized in that: The differential drive component (21) includes a top box (211), a positioning seat (212) is fixedly connected to the top of the top box (211), the inner wall of the positioning seat (212) is movably connected to the end of the docking push rod (121), a drive shaft (213) is rotatably connected to the inner wall of the top box (211), a drive wheel (214) is fixedly connected to the outer surface of the drive shaft (213), a planetary gear (215) meshes with the outer surface of the drive wheel (214), a connecting shaft is fixedly connected to the inner wall of the planetary gear (215), a guide block (216) is rotatably connected to the end of the connecting shaft, and a positioning disc (217) is rotatably connected to the outer surface of the connecting shaft.

6. The modular multi-precision replacement biological tissue grinding device according to claim 5, characterized in that: A turntable is fixedly connected to the outer surface of the drive shaft (213). The outer surface of the turntable rotates with the inner wall of the positioning disk (217). The outer surface of the guide block (216) slides with the inner wall of the top box (211). The outer surface of the planetary gear (215) meshes with the inner wall of the top box (211). The end of the drive shaft (213) slides with the inner wall of the drive shaft (125).

7. The modular multi-precision replacement biological tissue grinding device according to claim 5, characterized in that: The end cap (221) is fixed to the bottom of the top box (211), and the end of the follower column (223) is fixed to the end of the connecting shaft.

8. The modular multi-precision replacement biological tissue grinding device according to claim 5, characterized in that: Three connecting pipes (222) are provided and distributed on one side surface of the end cap (221). The end of the rotating shaft (225) is fixed to the end of the transmission shaft (213).

9. The modular multi-precision replacement biological tissue grinding device according to claim 5, characterized in that: The fine grinding mechanism (3) includes a container (31), a grinding shaft (32) is slidably connected to the inner wall of the container (31), a stirring arc plate (33) is fixedly connected to the outer surface of the grinding shaft (32), an arc groove (34) is opened on the surface of the stirring arc plate (33), a protective sleeve is fixedly connected to the outer surface of the grinding shaft (32), a pin (35) is fixedly connected to the end of the grinding shaft (32), a tension spring (38) is sleeved on the outer surface of the pin (35), a limiting magnetic block (36) is fixedly connected to the end of the pin (35), and a buffer pad (37) is fixedly connected to the outer surface of the limiting magnetic block (36).

10. A modular multi-precision replacement biological tissue grinding device according to claim 9, characterized in that: The inner wall of the protective sleeve is fixed to the outer surface of the rotating shaft (225), the outer surfaces of the insert (35) and the limiting magnetic block (36) slide against the inner wall of the rotating shaft (225), the end of the tension spring (38) is fixed to the end of the rotating shaft (225), there are two limiting magnetic blocks (36), which are respectively installed on the inner wall of the rotating shaft (225) and the end of the insert (35), and the polarity of the two limiting magnetic blocks (36) is the same. The outer surface of the container (31) is movably connected to the end of the top box (211) and the inner wall of the support cylinder (112).

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