A surface grinding device for a center shaft bowl assembly

Abstract

The application provides a middle shaft bowl set surface grinding device capable of reducing noise, relates to the technical field of middle shaft bowl set grinding, and comprises a fixed base, one side of the fixed base is provided with a fixed support plate, the top of a sealing cover is provided with an air pump, an output end of the air pump is provided with a main flow pipe, the sealing cover is located on the outer side of a positioning cover, the side of the main flow pipe is connected with a branch flow pipe, the branch flow pipe penetrates through the side of the sealing cover and is provided with a cleaning pipe, the cleaning pipe is installed on the inner side of the sealing cover, a groove is formed in the cleaning pipe, and the cleaning pipe is located at the bottom of a sound-absorbing plate. High-pressure airflow is guided to the cleaning pipe through the main flow pipe and the branch flow pipe, the high-pressure airflow sprayed from the groove of the cleaning pipe is used for cleaning the metal dust attached to the sound-absorbing plate, the problem that the metal dust is accumulated on the sound-absorbing plate is effectively avoided, and the problem that the metal dust generated in the grinding process is diffused along with airflow and attached to the surface of the sound-absorbing material, thereby seriously weakening the noise reduction effect is solved.

Description

Technical Field

[0001] This invention relates to the field of grinding technology for central bearing cups, and more particularly to a noise-reducing surface grinding device for central bearing cups. Background Technology

[0002] Bottom bracket headset usually refers to the head tube headset of a bicycle. During the casting or forging process, defects such as burrs, oxide layers, and scratches may occur on the surface of the bottom bracket headset. These defects can cause the bicycle bearings to jam and increase friction. Therefore, a grinding device is needed during the forming stage to remove surface defects, improve surface roughness, and ensure smooth bearing operation.

[0003] In the prior art, when the grinding device grinds the central shaft cup assembly, noise is generated during the operation of the equipment. To reduce noise pollution, sound-absorbing materials are usually added to suppress noise transmission. However, the metal dust generated during the grinding process will spread with the airflow and adhere to the surface of the sound-absorbing material, causing the pore structure of the sound-absorbing material to be blocked, which seriously weakens the noise reduction effect. Summary of the Invention

[0004] This invention relates to a noise reduction device for grinding the surface of a central bearing assembly, which addresses the problem that noise is generated during equipment operation. To reduce noise pollution, sound-absorbing materials are usually added to suppress noise propagation. However, metal dust generated during the grinding process diffuses with the airflow and adheres to the surface of the sound-absorbing material, causing blockage of the pore structure of the sound-absorbing material and severely weakening the noise reduction effect.

[0005] This invention provides a noise-reducing surface grinding device for a central bearing assembly, specifically comprising: a fixed base, a fixed support plate mounted on one side of the fixed base; a connecting plate mounted on the side of the fixed support plate, and a positioning cover mounted on the side of the fixed support plate via the connecting plate; a positioning support plate mounted on the top of the fixed support plate; a grinding drive assembly mounted on the positioning support plate; a detachable grinding disc mounted on the bottom of the grinding drive assembly; a guide groove provided on the side of the fixed support plate; a drive cylinder mounted on the side end of the positioning support plate, and a traction plate mounted on the output end of the drive cylinder; the traction plate slides... The movable plate is installed inside the guide groove, and a sealing cover is installed on the side end of the traction plate; the detachable grinding plate is located inside the sealing cover; multiple sound-absorbing plates are installed on the inner side of the sealing cover; the sound-absorbing plate has a conical structure and sound-absorbing holes are provided on the inner side of the sound-absorbing plate; an air pump is installed on the top of the sealing cover, and a main flow pipe is installed on the output end of the air pump, and the sealing cover is located outside the positioning cover; a diversion pipe is connected to the side of the main flow pipe; a cleaning pipe is installed through the side of the sealing cover through the diversion pipe; the cleaning pipe is installed inside the sealing cover, and a slot is opened on the cleaning pipe, which is located at the bottom of the sound-absorbing plate.

[0006] Furthermore, the fixed base has a circular structure, and a servo motor is installed on the top of the fixed base. A gear is installed on the output end of the servo motor, and a support column is installed in the middle of the top of the fixed base; a rotating plate is rotatably installed on the top of the support column.

[0007] Furthermore, four evenly distributed positioning elements are installed on the rotating plate, wherein the inner side of the positioning elements is provided with anti-slip grooves; a movable support plate is slidably installed on the inner side of the positioning elements; four evenly distributed guide grooves are provided on the inner bottom of the movable support plate; a spring is installed inside the guide groove, and a guide slide plate is slidably installed inside the guide groove through the spring.

[0008] Furthermore, an air spring is installed on the side of the guide slide plate, and a clamping plate is installed on the side of the guide slide plate via the air spring, wherein a rubber pad is installed on the side of the clamping plate; a guide plate is installed at the bottom of the guide slide plate, and the guide plate has an inclined structure; four connecting vertical rods are installed at the bottom of the movable support plate.

[0009] Furthermore, the connecting vertical rod is a cylindrical structure, and a positioning base plate is installed at the bottom of the connecting vertical rod; a drive rod is rotatably installed at the middle position of the positioning base plate; a gear is installed at the bottom of the drive rod through the bottom of the positioning base plate, and the gear at the bottom of the drive rod meshes with the gear at the output end of the servo motor at the top of the fixed base; a movable plate is installed on the outer side of the drive rod.

[0010] Furthermore, the movable plate has a circular structure and is slidably mounted on the outside of the connecting vertical rod. The movable plate has four slots, with the top and bottom sides of the slots having an arc-shaped structure. The slots on the movable plate are slidably mounted on the outside of the guide plate. A drive cylinder is mounted on the top of the fixed base, and a thrust plate is mounted on the output end of the drive cylinder. The thrust plate is moved upward and mounted on the bottom of the gear at the bottom of the drive rod.

[0011] Furthermore, the positioning cover is installed on top of a positioning component, and the positioning cover has a ring structure. Multiple slots are provided on the inner side wall of the positioning cover. A drive motor is installed on the outer side of the positioning cover, and a gear is installed on the output end of the drive motor. Air nozzles and a collection cover are slidably installed inside the positioning cover. A drive ring is installed on the outer side of the air nozzles and the collection cover.

[0012] Furthermore, the drive ring is a ring structure, and the outer side of the drive ring meshes with the gear at the output end of the drive motor on the outer side of the positioning cover; a guide ring is installed on the top of the inner sidewall of the positioning cover; a movable ring is connected to the top of the jet nozzle; the movable ring is slidably installed on the bottom inner side of the guide ring.

[0013] Furthermore, a collection ring is installed on the top of the outer wall of the positioning cover; a guide ring is connected to the side of the collection cover; the guide ring is slidably installed on the inner side of the collection ring; a refrigeration generating assembly is installed at the bottom of the fixed support plate; and a guide pipe is installed on the output end of the refrigeration generating assembly.

[0014] Furthermore, the side end of the guide pipe is connected to the side of the guide ring; a collection box is also installed at the bottom of the fixed support plate; a drive pump is installed at the top of the collection box, and a collection pipe is installed on the output end of the drive pump; the side end of the collection pipe is connected to the side of the collection ring.

[0015] This invention provides a noise-reducing surface grinding device for a central bearing assembly, which has the following beneficial effects: In use, this invention utilizes a high-pressure airflow generated by an air pump at the top of the sealed cover. This airflow is guided through the main pipe and branch pipe to the cleaning pipe. The high-pressure airflow ejected from the slotted cleaning pipe cleans the metal dust adhering to the sound-absorbing panel, effectively preventing the accumulation of metal dust on the sound-absorbing panel. This prevents the sound-absorbing panel from becoming clogged or its noise reduction effect from decreasing due to dust accumulation. The dust coverage rate on the surface of the sound-absorbing panel is reduced by more than 95%, effectively preventing sound energy attenuation caused by pore blockage, extending the replacement cycle of the sound-absorbing material, and reducing the amount of manual cleaning work.

[0016] In addition, the rotating jet nozzle ensures that the cold airflow is evenly distributed, avoiding excessively high or low local temperatures. This keeps the temperature of each part of the removable grinding disc relatively consistent, reduces thermal stress caused by temperature differences, improves the precision and stability of the removable grinding disc, and thus enhances the grinding quality of the bicycle bottom bracket headset.

[0017] Furthermore, the collection hood rotates synchronously with the drive ring, causing the guide ring to rotate within the collection ring, forming a comprehensive dust collection range. The cold airflow carries the dust generated during grinding towards the collection hood, where the drive pump generates a powerful suction, effectively drawing in the airflow and dust. This dust is then processed through the collection pipe into the collection box, significantly improving dust collection efficiency and reducing the impact of dust spillage on the working environment and the health of operators. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1 A schematic diagram of the overall structure of the present invention is shown; Figure 2A schematic cross-sectional view of the rotating plate structure of the present invention is shown; Figure 3 A schematic diagram of the movable tray of the present invention moving upward is shown; Figure 4 A three-dimensional structural diagram of the guide plate of the present invention is shown; Figure 5 A three-dimensional structural diagram of the positioning cover of the present invention is shown; Figure 6 A cross-sectional view of the positioning cover of the present invention is shown; Figure 7 A schematic cross-sectional view of the flow guide ring structure of the present invention is shown; Figure 8 A schematic cross-sectional view of the sealing cover structure of the present invention is shown; Figure 9 A cross-sectional view of the cleaning tube of the present invention is shown.

[0021] List of reference numerals 1. Fixed base; 101. Support column; 102. Rotating plate; 103. Positioning component; 104. Movable tray; 105. Guide groove; 106. Guide slide plate; 107. Clamping plate; 108. Guide plate; 109. Connecting vertical rod; 1010. Positioning base plate; 1011. Drive rod; 1012. Movable plate; 1013. Thrust plate; 2. Fixed support plate; 201. Positioning cover; 202. Jet nozzle; 203. Collection cover; 204. Drive ring; 205. Guide ring; 206. Movable ring; 207. Collection ring; 208. Guide ring; 209. Refrigeration generating assembly; 2010. Guide pipe; 2011. Collection box; 2012. Collection pipe; 3. Positioning support plate; 301. Grinding drive assembly; 302. Removable grinding disc; 303. Guide groove; 304. Traction plate; 305. Sealing cover; 306. Sound-absorbing plate; 307. Main pipe; 308. Diversion pipe; 309. Cleaning pipe. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. Based on the described 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.

[0023] Please refer to Figures 1 to 9 : Example 1: This invention proposes a noise-reducing surface grinding device for a central bearing assembly, comprising: a fixed base 1, which is circular in structure, with a servo motor mounted on its top and a gear mounted on the output end of the servo motor; a support column 101 mounted at the center of the top of the fixed base 1; a rotating plate 102 rotatably mounted on the top of the support column 101; four evenly distributed positioning members 103 mounted on the rotating plate 102, wherein the inner side of the positioning member 103 is provided with an anti-slip groove; a movable support plate 104 is slidably mounted on the inner side of the positioning member 103; four evenly distributed guide grooves 105 are provided on the bottom inner side of the movable support plate 104; a spring is installed inside the guide groove 105, and a guide slide plate 106 is slidably mounted inside the guide groove 105 via the spring; an air spring is mounted on the side of the guide slide plate 106, and a clamping plate 107 is mounted on the side of the guide slide plate 106 via the air spring, wherein a rubber pad is mounted on the side of the clamping plate 107; and a guide plate 106 is mounted on the bottom of the guide slide plate 106. 08. The guide plate 108 has an inclined structure; four connecting vertical rods 109 are installed at the bottom of the movable support plate 104; the connecting vertical rods 109 have a cylindrical structure, and a positioning base plate 1010 is installed at the bottom of the connecting vertical rods 109; a drive rod 1011 is rotatably installed at the middle position of the positioning base plate 1010; a gear is installed at the bottom of the drive rod 1011, penetrating the bottom of the positioning base plate 1010, and the gear at the bottom of the drive rod 1011 meshes with the gear at the output end of the servo motor at the top of the fixed base 1. A movable plate 1012 is installed on the outside; the movable plate 1012 has a circular structure and is also slidably installed on the outside of the connecting vertical rod 109, and the movable plate 1012 has four slots, the top and bottom sides of the slots are arc-shaped; the slots on the movable plate 1012 are slidably installed on the outside of the guide plate 108; a drive cylinder is installed on the top of the fixed base 1, and a thrust plate 1013 is installed on the output end of the drive cylinder; the thrust plate 1013 moves upward and is installed at the bottom of the bottom gear of the drive rod 1011.

[0024] In this embodiment of the invention, when grinding the bottom bracket headset of a bicycle, the headset to be ground is placed inside the movable support plate 104. The gear at the output end of the servo motor at the top of the fixed base 1 drives the gear at the bottom of the drive rod 1011 to rotate. The drive rod 1011 rotates in the middle of the positioning base plate 1010. The drive rod 1011 drives the movable plate 1012 to move upward along the connecting vertical rod 109. The slot on the movable plate 1012 pushes the side of the guide plate 108 to move. The top of the guide plate 108 drives the guide slide plate 106 to move along the guide groove 105. The side of the guide slide plate 106 uses an air spring to drive the clamping plate 107 to clamp the headset. The air spring ensures the stability of the clamping and does not damage the headset. This reduces pressure loss and vibration transmission during the grinding process, as well as noise transmission. The rotating plate 102 on top of the supporting column 101 rotates the installed bowl assembly to below the detachable grinding disc 302. The drive cylinder at the top of the fixed base 1 then moves the thrust plate 1013 upwards. The thrust plate 1013 moves to the bottom of the gear at the bottom of the drive rod 1011, pushing the positioning base plate 1010. Through the connecting vertical rod 109, the movable support plate 104 moves upwards, away from the inside of the positioning component 103, exposing the grinding side of the bowl assembly for easier grinding. The movable support plate 104 rotates in all directions for use. The bowl assembly can be installed and disassembled simultaneously with the grinding process. The structure is simple, the operation is convenient, and it greatly improves the processing efficiency of the central shaft bowl assembly.

[0025] In Example 2, based on Example 1, a fixed support plate 2 is installed on one side of the fixed base 1; a connecting plate is installed on the side of the fixed support plate 2, and a positioning cover 201 is installed on the side of the fixed support plate 2 via the connecting plate; the positioning cover 201 is installed on top of a positioning component 103, and the positioning cover 201 has a ring structure. Multiple slots are provided on the inner wall of the positioning cover 201, and a drive motor is installed on the outer side of the positioning cover 201. A gear is installed on the output end of the drive motor; relatively distributed air nozzles 202 and collection covers 203 are slidably installed inside the positioning cover 201; a drive ring 204 is installed on the outer side of the air nozzles 202 and collection covers 203; the drive ring 204 has a ring structure, and the outer side of the drive ring 204 is aligned with the gear on the output end of the drive motor on the outer side of the positioning cover 201. The components are meshed; a guide ring 205 is installed on the top of the inner wall of the positioning cover 201; a movable ring 206 is connected to the top of the jet nozzle 202; the movable ring 206 is slidably installed on the bottom inner side of the guide ring 205; a collection ring 207 is installed on the top of the outer wall of the positioning cover 201; a guide ring 208 is connected to the side of the collection cover 203; the guide ring 208 is slidably installed on the inner side of the collection ring 207; a refrigeration generating assembly 209 is installed at the bottom of the fixed support plate 2; a guide pipe 2010 is installed on the output end of the refrigeration generating assembly 209; the side end of the guide pipe 2010 is connected to the side of the guide ring 205; a collection box 2011 is also installed at the bottom of the fixed support plate 2; a drive pump is installed on the top of the collection box 2011, and a collection pipe 2012 is installed on the output end of the drive pump;The side end of the collection pipe 2012 is connected to the side of the collection ring 207. When grinding the bicycle bottom bracket headset, the rotating plate 102 drives a positioning component 103 to move below the positioning cover 201. During the grinding process, the cooling generator 209 at the bottom of the fixed support plate 2 and the drive pump on the collection box 2011 work simultaneously. The cold air generated by the cooling generator 209 enters the interior of the guide ring 205 through the guide pipe 2010. The cold air is sprayed out through the nozzle 202 connected to the movable ring 206 to cool the rotating part of the detachable grinding disc 302. The cold air carries the dust generated during grinding to the position of the collection cover 203. When the drive pump works, the collection cover 203 absorbs the airflow, and the airflow carrying the dust enters the collection box 201. Inside the collecting ring 207, the dust enters the collecting box 2011 through the collecting pipe 2012 for processing. Simultaneously, the drive motor on the outside of the positioning cover 201 drives the drive ring 204 to rotate via gears. The drive ring 204 drives the air nozzle 202 and the collecting cover 203 to rotate synchronously. The air nozzle 202 then drives the movable ring 206 to rotate inside the guide ring 205, and the collecting cover 203 drives the guide ring 208 to rotate inside the collecting ring 207. This allows the airflow to comprehensively cool the detachable grinding disc 302 and enables the collecting cover 203 to collect dust from all directions. Additionally, the bottom of the collecting cover 203 has inclined grooves on both sides to attract and treat residual dust inside the bottom of the positioning cover 201, reducing dust residue on the grinding disc assembly and minimizing noise increases caused by increased resistance.

[0026] In Example 3, based on Example 1, a positioning support plate 3 is installed on the top of the fixed support plate 2; a grinding drive assembly 301 is installed on the positioning support plate 3; a detachable grinding disc 302 is installed at the bottom of the grinding drive assembly 301; a guide groove 303 is provided on the side of the fixed support plate 2; a drive cylinder is installed on the side end of the positioning support plate 3, and a traction plate 304 is installed on the output end of the drive cylinder; the traction plate 304 is slidably installed inside the guide groove 303, and a sealing cover 305 is installed on the side end of the traction plate 304; the detachable grinding disc 302... 2. The sealing cover 305 is located inside the sealing cover 305. Multiple sound-absorbing panels 306 are installed on the inner side of the sealing cover 305. The sound-absorbing panels 306 have a conical structure and sound-absorbing holes on their inner sides. An air pump is installed on the top of the sealing cover 305, and a main flow pipe 307 is installed on the output end of the air pump. The sealing cover 305 is located outside the positioning cover 201. A branch pipe 308 is connected to the side of the main flow pipe 307. A cleaning pipe 309 is installed through the branch pipe 308 and runs along the side of the sealing cover 305. The cleaning pipe 309 is installed inside the sealing cover 305. The cleaning tube 309 has a slot and is located at the bottom of the sound-absorbing plate 306. When grinding the bicycle bottom bracket headset, the grinding drive assembly 301 of the positioning support plate 3 drives the detachable grinding disc 302 to move downward and rotate for grinding. At the same time, the drive cylinder at the side end of the positioning support plate 3 drives the traction plate 304 to move vertically downward along the guide groove 303, so that the traction plate 304 drives the sealing cover 305 and the detachable grinding disc 302 to move downward synchronously, so that the sealing cover 305 is installed on the positioning cover 2. On the outside of 01, during the operation of the detachable grinding disc 302, the sound-absorbing plate 306 reduces the noise generated and reduces the transmission of noise. When the operation stops, the high-pressure airflow generated by the air pump at the top of the sealing cover 305 enters the interior of the cleaning pipe 309 through the main pipe 307 and the branch pipe 308. The high-pressure airflow sprayed from the slot on the cleaning pipe 309 blows and cleans the metal dust attached to the sound-absorbing plate 306, ensuring the cleanliness of the surface of the sound-absorbing plate 306 and ensuring the noise reduction effect of the sound-absorbing plate 306.

[0027] The working principle of this embodiment is as follows: The bowl assembly is placed in the movable support plate 104. The servo motor at the top of the fixed base 1 drives a drive rod 1011 to rotate in the middle of the positioning base plate 1010. The drive rod 1011 drives the movable plate 1012 to move upward along the connecting vertical rod 109. The movable plate 1012 pushes the guide slide plate 106 at the top of the guide plate 108 to move along the guide groove 105. The guide slide plate 106 drives the clamping plate 107 to clamp the bowl assembly through the air spring. The rotating plate 102 at the top of the support column 101 rotates the installed bowl assembly to the positioning cover 2. Below 01, the drive cylinder at the top of the fixed base 1 drives the thrust plate 1013 to push the bottom gear of the drive rod 1011 and the positioning base plate 1010, causing the movable support plate 104 to move the bowl assembly upwards away from the positioning member 103. The grinding drive assembly 301 drives the detachable grinding disc 302 downwards. At the same time, the drive cylinder drives the traction plate 304 to move vertically downwards along the guide groove 303. The traction plate 304 drives the sealing cover 305 and the detachable grinding disc 302 to move downwards synchronously. The sealing cover 305 is installed on the outside of the positioning cover 201. The detachable grinding disc 302 is positioned on the bowl assembly. During the grinding process, the sound-absorbing panel 306 reduces the noise generated. During grinding, the drive pumps on the cooling generator 209 and the collection box 2011 operate simultaneously. The cold airflow generated by the cooling generator 209 enters the guide ring 205 through the guide pipe 2010 and is then ejected through the nozzle 202 to cool the rotating parts of the detachable grinding disc 302. The cold airflow carries the grinding dust to the collection hood 203, and the airflow absorbed by the collection hood 203 carries the dust through the collection ring 207 and the collection pipe 2012 into the collection box. Inside 2011, the drive motor on the outside of the positioning cover 201 drives the drive ring 204 to rotate through gears. The drive ring 204 drives the jet nozzle 202 and the collection cover 203 to rotate synchronously, cooling the detachable grinding disc 302 and collecting dust from all directions. After stopping work, the high-pressure airflow generated by the air pump at the top of the sealing cover 305 enters the cleaning pipe 309 through the main pipe 307 and the branch pipe 308. The high-pressure airflow sprayed from the slot on the cleaning pipe 309 blows and cleans the metal dust attached to the sound-absorbing panel 306, ensuring the noise reduction effect of the sound-absorbing panel 306.

[0028] The following points should be noted in this article: 1. The accompanying drawings of the embodiments of the present invention only involve the structures involved in the embodiments of the present invention; other structures can refer to general designs.

[0029] 2. Where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other to obtain new embodiments.

[0030] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A noise-reducing surface grinding device for a central bearing assembly, characterized in that, include: A fixed base (1) is provided, and a fixed support plate (2) is installed on one side of the fixed base (1); a support column (101) is installed at the middle position of the top of the fixed base (1); a rotating plate (102) is rotatably installed on the top of the support column (101); four evenly distributed positioning parts (103) are installed on the rotating plate (102), wherein the inner side of the positioning part (103) is provided with an anti-slip groove; A connecting plate is installed on the side of the fixed support plate (2), and a positioning cover (201) is installed on the side of the fixed support plate (2) through the connecting plate; the positioning cover (201) is installed on the top of a positioning component (103), and multiple slots are provided on the inner wall of the positioning cover (201); a drive motor is installed on the outer side of the positioning cover (201), and a gear is installed on the output end of the drive motor; relatively distributed jet nozzles (202) and collection covers (203) are slidably installed inside the positioning cover (201); a drive ring (204) is installed on the outer side of the jet nozzles (202) and collection covers (203); the outer side of the drive ring (204) meshes with the gear on the output end of the drive motor on the outer side of the positioning cover (201); a guide ring (205) is installed on the top of the inner wall of the positioning cover (201); a movable ring (206) is connected to the top of the jet nozzles (202); The movable ring (206) is slidably installed on the inner bottom of the guide ring (205); a collection ring (207) is installed on the top of the outer wall of the positioning cover (201); a guide ring (208) is connected to the side of the collection cover (203); the guide ring (208) is slidably installed on the inner side of the collection ring (207); a refrigeration generating assembly (209) is installed at the bottom of the fixed support plate (2); a guide pipe (2010) is installed on the output end of the refrigeration generating assembly (209); the side end of the guide pipe (2010) is connected to the side of the guide ring (205); a collection box (2011) is also installed at the bottom of the fixed support plate (2); a drive pump is installed on the top of the collection box (2011), and a collection pipe (2012) is installed on the output end of the drive pump; the side end of the collection pipe (2012) is connected to the side of the collection ring (207); A positioning support plate (3) is installed on the top of the fixed support plate (2); a grinding drive assembly (301) is installed on the positioning support plate (3); a detachable grinding disc (302) is installed on the bottom of the grinding drive assembly (301); a guide groove (303) is provided on the side of the fixed support plate (2); a drive cylinder is installed on the side end of the positioning support plate (3), and a traction plate (304) is installed on the output end of the drive cylinder; the traction plate (304) is slidably installed inside the guide groove (303), and a sealing cover (305) is installed on the side end of the traction plate (304); the detachable grinding disc (302) is located inside the sealing cover (305); the sealing cover Multiple sound-absorbing panels (306) are installed on the inner side of (305); the inner side of the sound-absorbing panel (306) is provided with sound-absorbing holes; an air pump is installed on the top of the sealing cover (305), and a main flow pipe (307) is installed on the output end of the air pump. The sealing cover (305) is located outside the positioning cover (201); a diversion pipe (308) is connected to the side of the main flow pipe (307); a cleaning pipe (309) is installed through the side of the sealing cover (305); the cleaning pipe (309) is installed on the inner side of the sealing cover (305), and a slot is opened on the cleaning pipe (309). The cleaning pipe (309) is located at the bottom of the sound-absorbing panel (306).

2. The noise-reducing surface grinding device for the central bearing assembly according to claim 1, characterized in that, A servo motor is mounted on the top of the fixed base (1), and a gear is mounted on the output end of the servo motor.

3. The noise-reducing surface grinding device for the central bearing assembly according to claim 2, characterized in that, The positioning component (103) has a movable support plate (104) slidably mounted on its inner side; the bottom of the movable support plate (104) has four evenly distributed guide grooves (105); the guide grooves (105) are equipped with springs inside, and guide slide plates (106) are slidably mounted inside the guide grooves (105) through the springs.

4. The noise-reducing surface grinding device for the central bearing assembly according to claim 3, characterized in that, An air spring is installed on the side of the guide slide plate (106), and a clamp plate (107) is installed on the side of the guide slide plate (106) via the air spring. A rubber pad is installed on the side of the clamp plate (107). A guide plate (108) is installed at the bottom of the guide slide plate (106). Four connecting vertical rods (109) are installed at the bottom of the movable support plate (104).

5. The noise-reducing surface grinding device for the central bearing assembly according to claim 4, characterized in that, A positioning base plate (1010) is installed at the bottom of the connecting vertical rod (109); a drive rod (1011) is rotatably installed at the middle position of the positioning base plate (1010); a gear is installed at the bottom of the drive rod (1011) through the bottom of the positioning base plate (1010), the gear at the bottom of the drive rod (1011) meshes with the gear at the output end of the servo motor at the top of the fixed base (1), and a movable plate (1012) is installed on the outside of the drive rod (1011).

6. The noise-reducing central bearing assembly surface grinding device according to claim 5, characterized in that, The movable plate (1012) is also slidably mounted on the outside of the connecting vertical rod (109), and the movable plate (1012) has four slots; the slots on the movable plate (1012) are slidably mounted on the outside of the guide plate (108); a drive cylinder is mounted on the top of the fixed base (1), and a thrust plate (1013) is mounted on the output end of the drive cylinder; the thrust plate (1013) is moved upward and mounted on the bottom of the bottom gear of the drive rod (1011).

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