A floor grinding device

Abstract

This invention discloses a floor grinding device, comprising a body, a movable frame, a telescopic cylinder, a lifting plate, a drive assembly, an elastic assembly, and a grinding assembly. The elastic assembly includes an outer ring plate, an inner ring plate, a movable rod, a spring, and a support plate. Movable frames are mounted on the left and right sides of the body, with telescopic cylinders connected to opposite sides of the movable frames. The telescopic ends of the telescopic cylinders on both sides are connected to the lifting plate. The lower end of the lifting plate is connected to the outer ring plate, with a gap between the lifting plate and the outer ring plate. The inner ring plate is rotatably connected to the inner ring plate. A movable rod is slidably mounted through the inner ring plate. The top of the movable rod is fixedly connected to a ring plate, and the lower end is connected to the grinding assembly. The lower end of the movable rod has an external thread, and the support plate is threadedly connected to the lower end of the movable rod. The spring is sleeved on the movable rod, with its two ends connected to the support plate and the inner ring plate, respectively. The drive assembly drives the inner ring plate to rotate. This invention can effectively achieve a wide range of adjustment of the grinding force of the grinding assembly, adapting to grinding operations on various concrete floors.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and specifically to a floor grinding device. Background Technology

[0002] In the field of building construction and floor maintenance, concrete floor grinding is an important and common task that directly affects the flatness, aesthetics, and subsequent performance of the floor.

[0003] However, traditional concrete floor grinding devices often lack flexible and precise adjustment mechanisms in terms of grinding intensity. Many devices use a fixed downward pressure method, making it impossible to adjust the grinding intensity according to the actual situation. For example, when treating old concrete floors, due to the uneven hardness of the surface, grinding with a fixed intensity can easily lead to over-grinding in some areas, affecting both the grinding quality and reducing work efficiency.

[0004] Therefore, there is an urgent need for a floor grinding device to solve the problem that traditional concrete floor grinding devices cannot adjust the grinding intensity according to the actual situation. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing a floor grinding device to solve the problem that traditional concrete floor grinding devices cannot adjust the grinding intensity according to actual conditions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A floor grinding device includes a body, a movable frame, telescopic cylinders, a lifting plate, a drive assembly, an elastic assembly, and a grinding assembly. The elastic assembly includes an outer ring plate, an inner ring plate, several movable rods, a spring, and a support plate. Movable frames are respectively mounted downwards on the left and right sides of the body. Vertically arranged telescopic cylinders are connected to opposite sides of the movable frames on both sides. The telescopic ends of the telescopic cylinders on both sides are connected upwards to a lifting plate located below the body. The lower end of the lifting plate is connected to the outer ring plate, and the lifting plate is aligned with the outer ring plate. There is a gap between the outer ring plates. An inner ring plate is rotatably connected to the inner side of the outer ring plate. Several movable rods are vertically slidably installed on the inner ring plate. Several movable rods can pass upward through the top of the inner ring plate and are fixedly connected to a ring plate. The lower ends of several movable rods are connected to a grinding component for grinding. The lower end of the movable rod is provided with an external thread. The support plate is threaded to the lower end of the movable rod. The spring is sleeved on the movable rod and its two ends are respectively connected to the support plate and the inner ring plate. The driving component is used to drive the rotation of the inner ring plate.

[0008] To optimize the above technical solution, the specific measures also include:

[0009] Furthermore, the grinding assembly includes a rotating component, a locking bolt, and a grinding disc. The bottom ends of several movable rods are detachably connected to the rotating component. The bottom end of the rotating component has a mounting groove, and the center of the upper end of the rotating component has a threaded hole that extends through the mounting groove. The center of the grinding disc has a groove, and the grinding disc is installed in the mounting groove. The locking bolt is used to pass through the groove from the lower end of the grinding disc and then be threaded into the threaded hole, thus fixing the grinding disc in the mounting groove.

[0010] Furthermore, the inner wall of the mounting groove is provided with several locking blocks arranged in a ring at equal intervals, and the side wall of the grinding disc is provided with corresponding locking grooves for cooperating with the locking blocks.

[0011] Furthermore, the driving assembly includes a drive motor, a gear, and a toothed groove. The inner ring plate has a toothed groove on its inner side. The drive motor is mounted on the lifting plate. The drive end of the drive motor is set downward and connected to the gear. The gear meshes with the toothed groove. The drive motor is used to drive the gear to rotate the inner ring plate.

[0012] Furthermore, the diameter of the gear is smaller than the tooth groove diameter, the gear meshes with part of the tooth groove, and there is a gap between the gear and the tooth groove at the far end.

[0013] Furthermore, it also includes a dust collection assembly, which includes a vacuum cleaner, a dust collection tube, and a cover. A dust collection annular groove is formed at the bottom of the rotating part and around the mounting groove. An annular cavity is formed inside the rotating part. Several dust guide channels are also formed on the rotating part, connecting the dust collection annular groove and the annular cavity. Several dust guide ports are formed at the upper end of the rotating part, communicating with the annular cavity. A convex threaded ring is formed on the upper end face of the rotating part and around the dust guide ports. The cover is threaded into the threaded ring and covers the dust guide ports. A vertical dust guide tube is connected to the upper end of the cover. One end of the dust collection tube can slide vertically and is rotatably sealed and slid into the dust guide tube. The other end passes through the gap between the gear and the distal tooth groove and connects to the vacuum cleaner. The vacuum cleaner is installed on the side of the body.

[0014] Furthermore, the upper end face of the rotating component is provided with a hexagonal groove that is opposite to the threaded hole, and a hexagonal block is placed in the hexagonal groove. A vertical square rod is fixedly installed on the lower surface of the hexagonal block. A vertical square groove is correspondingly provided on the upper end of the locking bolt. The hexagonal block is used to insert into the hexagonal groove after the locking bolt is installed in the threaded hole, so that the square rod is inserted into the square groove.

[0015] Furthermore, a stop bar is fixedly installed on the top inner wall of the cover, the stop bar being used to abut against the upper end of the hexagonal block.

[0016] Furthermore, a set of moving track wheels is installed on the opposite sides of the movable frame located on the left and right sides of the machine body.

[0017] Furthermore, a water storage tank is fixedly installed on the upper end of the machine body. A water inlet is provided on the upper surface of the water storage tank, and a tank cover is installed at the water inlet. A drain pipe is connected to the side wall of the water storage tank, and a cap is provided at the end of the drain pipe.

[0018] The beneficial effects of this invention are:

[0019] This invention, through the design of elastic components, possesses intelligent and flexible grinding force adjustment capabilities. During operation, a telescopic cylinder drives the lifting plate downwards, with the outer and inner ring plates descending synchronously. When the grinding component contacts the concrete surface, the telescopic cylinder drives the lifting plate further downwards, compressing the spring on the outer side of the movable rod. This spring, in turn, applies elastic downward pressure to the concrete surface through the grinding component. When adjusting the grinding force for specific concrete surfaces, the initial support plate can be adjusted. By rotating the support plate, it can be moved upwards or downwards on the outer side of the movable rod. This causes the spring to be compressed or stretched. The greater the initial compression of the spring after adjustment, the greater the downward pressure generated when the lifting plate drives the grinding component to move down. Conversely, the less compression, the less pressure. In this way, the grinding force of the grinding component can be effectively adjusted over a wide range, adapting to grinding operations on various concrete surfaces and making it more flexible to use. Then, the inner ring plate is driven by the drive component to rotate, carrying the grinding component, thus completing the grinding operation. The inner ring plate can both limit the movement range of the movable rod in conjunction with the lifting plate and drive several movable rods to move synchronously, ensuring the reliability of the grinding component.

[0020] The telescopic cylinder in this invention, combined with springs and other structures, can flexibly and precisely adjust the pressure of the grinding disc to adapt to different ground surfaces; the unique locking bolts and other structures enable convenient installation and removal of the grinding disc, reducing maintenance costs and ensuring construction progress; the dust collection component powerfully adsorbs dust, purifies the environment, protects personnel health, and comprehensively improves the efficiency and safety of grinding operations.

[0021] The locking bolts and other structures of this invention provide convenient and efficient replacement of the grinding disc. The easily worn grinding disc is installed in the mounting slot, and the locking bolts and other structures allow operators to easily install and remove it. Compared to the cumbersome replacement process of traditional grinding devices, this design eliminates the need for complex operations, significantly reducing the time and effort spent on disassembling and installing the grinding disc. In large-scale floor grinding projects where frequent grinding disc replacements are required, this convenient replacement method is particularly advantageous, reducing equipment maintenance costs, shortening downtime, ensuring the continuity of construction progress, and enabling efficient and continuous grinding operations.

[0022] In this invention, the dust collection component plays a crucial role in the grinding process, establishing an efficient and healthy dust handling system. The dust collection component operates synchronously while the grinding disc rotates, quickly and effectively sucking up the dust generated during grinding. Unlike traditional equipment with poor dust collection and difficulty in collecting fine dust, the dust collection component of this device is professionally designed to powerfully adsorb dust of various particle sizes, effectively preventing dust from spreading at the construction site. This not only improves the construction environment and reduces dust pollution, but more importantly, it greatly reduces the risk of operators inhaling dust, protecting their health and meeting the stringent requirements of modern construction for environmental protection and occupational health and safety, significantly improving the effectiveness of the grinding device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a floor grinding device proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the bottom structure of a floor grinding device proposed in this invention;

[0025] Figure 3 This is a first-view schematic diagram of a partial structure of a floor grinding device proposed in this invention.

[0026] Figure 4 This is a second-view schematic diagram of a partial structure of a floor grinding device proposed in this invention;

[0027] Figure 5 This is a third-view schematic diagram of a partial structure of a floor grinding device proposed in this invention;

[0028] Figure 6 This is a fourth-view schematic diagram of a partial structure of a floor grinding device proposed in this invention.

[0029] Figure 7 This is a schematic diagram of the rotating component of a floor grinding device proposed in this invention;

[0030] Figure 8 This is a partial structural cross-sectional view of a floor grinding device proposed in this invention;

[0031] Figure 9 for Figure 8 Enlarged view of the structure at point A in the middle;

[0032] Figure 10 This is a schematic diagram of the rear structure of a floor grinding device proposed in this invention.

[0033] Reference numerals: 101-Main body, 102-Moving frame, 103-Side plate, 104-Telescopic cylinder, 105-Lifting plate, 106-Connecting rod, 107-Outer ring plate, 108-Inner ring plate, 109-Ring piece, 110-Modible rod, 111-Mounting piece, 112-Rotating component, 113-Mounting groove, 114-Grinding disc, 201-Drive motor, 202-Gear, 203-Gear groove, 301-Slot, 302-Block, 303-Groove, 30 4-Threaded hole, 305-Locking bolt, 401-Dust suction ring groove, 402-Dust guide channel, 403-Ring cavity, 404-Dust guide port, 405-Threaded ring, 406-Sealing cover, 407-Dust guide pipe, 408-Dust suction pipe, 409-Corrugated pipe, 410-Vacuum cleaner, 501-Square groove, 502-Hexagonal block, 503-Square rod, 504-Abutment rod, 601-Spring, 602-Panel, 701-Water storage tank, 702-Tank cover, 703-Drain pipe. Detailed Implementation

[0034] The invention will now be described in further detail with reference to the accompanying drawings.

[0035] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and attached Figure 8As shown, a floor grinding device according to an embodiment of the present invention includes a body 101, a movable frame 102, a telescopic cylinder 104, a lifting plate 105, a drive assembly, an elastic assembly, and a grinding assembly. The elastic assembly includes an outer ring plate 107, an inner ring plate 108, several movable rods 110, a spring 601, and a support plate 602. Movable frames 102 are respectively installed downwards on the left and right sides of the body 101. The opposite sides of the movable frames 102 on both sides are respectively connected to vertically arranged telescopic cylinders 104 through side plates 103. The telescopic ends of the telescopic cylinders 104 on both sides are connected upwards to the lifting plate 105 located below the body 101. The lower end of the lifting plate 105 is connected to the outer ring plate 107 through a connecting rod 106, and the lifting plate 105 and the outer ring plate 107 are connected to each other. There is a gap between the plates 107. The inner ring plate 108 is rotatably connected to the inner side of the outer ring plate 107. The inner ring plate 108 has several through holes that are evenly spaced and distributed in a ring. Several movable rods 110 are vertically slidably installed through the through holes. The movable rods 110 can pass upward through the top of the inner ring plate 108 and are fixedly connected to a ring plate 109. The lower ends of the movable rods 110 are connected to a grinding component for grinding. The lower end of the movable rod 110 has an external thread. The support plate 602 is threaded to the lower end of the movable rod 110. The spring 601 is sleeved on the movable rod 110 and its two ends are respectively connected to the upper end face of the support plate 602 and the lower end face of the inner ring plate 108. The driving component is used to drive the rotation of the inner ring plate 108.

[0036] This invention utilizes an elastic component. When the grinding component contacts the concrete surface, the telescopic cylinder 104 drives the lifting plate 105 to move further downward, compressing the spring 601 on the outer side of the movable rod 110. This spring 601 then applies an elastic downward pressure to the concrete surface. When adjusting the grinding force for specific concrete surfaces, the initial support plate 602 can be adjusted. Rotating the support plate 602 allows it to move upward or downward on the outer side of the movable rod 110, compressing or stretching the spring 601. The greater the initial compression after adjustment, the greater the downward pressure generated when the lifting plate 105 drives the grinding component to move down. Conversely, the smaller the pressure, the less pressure is generated. In this way, the grinding force of the grinding component can be effectively adjusted over a wide range, which can adapt to grinding operations on various concrete surfaces and make it more flexible to use. Then, the inner ring plate 108 is driven by the drive component to rotate the grinding component, and the grinding operation can be completed. The inner ring plate 108 can not only work with the lifting plate 105 to limit the movement range of the movable rod 110, but also drive several movable rods 110 to move synchronously, ensuring the reliability of the grinding component.

[0037] When in use, since the compression of spring 601 is proportional to the downward pressure of the grinding component, the operator can precisely adjust the pressure of the grinding component on the ground according to the actual conditions such as the hardness and flatness of the ground. Whether it is an old or uneven ground or a newly poured concrete surface, the mechanism can achieve appropriate grinding, avoiding over-grinding or under-grinding. This ensures grinding quality and improves work efficiency. At the same time, this adjustment method is easy to operate, requires no additional tools, and can quickly respond to the grinding needs of different areas.

[0038] As attached Figure 7 As shown, in another specific embodiment based on the above, the grinding assembly includes a rotating component 112, a locking bolt 305, and a grinding disc 114. The bottom ends of several movable rods 110 are detachably connected to the rotating component 112 via mounting plates 111 and bolts. The bottom end of the rotating component 112 is provided with a mounting groove 113. The upper end of the rotating component 112 is provided with a threaded hole 304 that extends through the mounting groove 113. The center of the grinding disc 114 is provided with a groove 303. The grinding disc 114 is installed in the mounting groove 113. The locking bolt 305 is used to pass through the groove 303 from the lower end of the grinding disc 114 and then be threaded into the threaded hole 304, thereby fixing the grinding disc 114 in the mounting groove 113. Therefore, when installing the grinding disc 114, the grinding disc 114 can be directly placed in the mounting groove 113 below the rotating part 112, and then the locking bolt 305 can be inserted into the groove 303 and threadedly connected with the threaded hole 304, so that the grinding disc 114 can be conveniently locked in the mounting groove 113 of the rotating part 112. At the same time, the grinding disc 114 in the mounting groove 113 can be flexibly installed and removed, making it easy to replace the easily worn grinding disc 114.

[0039] The mounting groove 113 has several locking blocks 302 evenly distributed in a ring on its inner wall, and the side wall of the grinding disc 114 has corresponding locking grooves 301 for engaging with the locking blocks 302. When installing the grinding disc 114, aligning the locking grooves 301 on the outside of the grinding disc 114 with the locking blocks 302 in the mounting groove 113 can limit the position of the grinding disc 114, thereby ensuring that the grinding disc 114 can rotate synchronously with the rotating component 112 when the rotating component 112 rotates, increasing the stability of use.

[0040] In a further specific embodiment based on the above, the driving component includes a drive motor 201, a gear 202, and a toothed groove 203. The inner side of the annular inner ring plate 108 is provided with a ring of equally spaced toothed grooves 203. The drive motor 201 is mounted on the lifting plate 105. The drive end of the drive motor 201 is set downward and connected to the gear 202. The gear 202 meshes with the toothed groove 203. The drive motor 201 is used to drive the gear 202 to rotate the inner ring plate 108.

[0041] In this configuration, the diameter of the gear 202 is smaller than the diameter of the tooth groove 203. The gear 202 meshes with a portion of the tooth groove 203, and there is a gap between the gear 202 and the more distant tooth groove 203.

[0042] In a further specific embodiment based on the above, a dust collection assembly is also included. The dust collection assembly includes a vacuum cleaner 410, a suction pipe 408, and a cover 406. A suction ring groove 401 is formed at the bottom end of the rotating member 112 and around the mounting groove 113. An annular cavity 403 is formed inside the rotating member 112. Several dust guiding channels 402 are also formed on the rotating member 112, connecting the suction ring groove 401 and the annular cavity 403. The several dust guiding channels 402 are evenly spaced and arranged in a ring. Several equally spaced and annularly arranged channels are formed at the upper end of the rotating member 112. The dust guide port 404 is connected to the cavity 403. The upper end face of the rotating part 112 and the periphery of the dust guide port 404 are provided with a convex threaded ring 405. The cover 406 is threadedly connected to the threaded ring 405 and covers the dust guide port 404. The upper end of the cover 406 is connected to a vertical dust guide tube 407. One end of the suction tube 408 can slide vertically and rotatably and is sealed and slidably inserted into the dust guide tube 407. The other end passes through the gap between the gear 202 and the far end tooth groove 203 and is connected to the vacuum cleaner 410. The vacuum cleaner 410 is installed on the side of the body 101.

[0043] The aforementioned suction pipe 408 can be fixedly passed through the lifting plate 105, and the suction pipe 408 can be connected to the vacuum cleaner 410 through the corrugated pipe 409. During the polishing process, the suction action of the vacuum cleaner 410 allows the dust generated during polishing to directly enter the dust suction ring groove 401 of the rotating component 112, and then enter the ring cavity 403 along the dust guide channel 402, and enter the cover 406 above the rotating component 112 through the dust guide port 404. Finally, it enters the vacuum cleaner 410 through the suction pipe 408 and the corrugated pipe 409 to be collected, thereby effectively preventing dust from flying during the polishing process. Furthermore, the mounting plate 111 at the bottom of the aforementioned movable rod 110 and the rotating part 112 are connected by bolts, which allows the rotating part 112 to be easily disassembled. After the rotating part 112 is disassembled, the cover 406 in the threaded ring 405 can be directly rotated off, making it convenient to clean the dust suction ring groove 401, dust guide channel 402, ring cavity 403 and dust guide port 404 in the rotating part 112, resulting in better performance.

[0044] As attached Figure 9As shown, the upper end face of the rotating part 112 is provided with a hexagonal groove that is connected to the threaded hole 304, and a hexagonal block 502 is placed in the hexagonal groove. A vertical square rod 503 is fixedly installed on the lower surface of the hexagonal block 502. A vertical square groove 501 is correspondingly provided on the upper end of the locking bolt 305. The hexagonal block 502 is used to insert into the hexagonal groove after the locking bolt 305 is installed in the threaded hole 304, so that the square rod 503 is inserted into the square groove 501. Therefore, after the locking bolt 305 fixes the grinding disc 114 in the mounting groove 113, the hexagonal block 502 can be placed in the hexagonal slot, so that the square rod 503 at the bottom of the hexagonal block 502 can be directly inserted into the square groove 501 at the top of the locking bolt 305. This can effectively prevent the locking bolt 305 from loosening, making the grinding disc 114 more stable after installation, and preventing it from falling off due to the loosening of the locking bolt 305, thus further improving the safety during use.

[0045] The top inner wall of the aforementioned cover 406 is also fixedly fitted with a stop bar 504, which is used to abut against the upper end of the hexagonal block 502. Thus, when the cover 406 is threaded into the threaded ring 405, the stop bar 504 in the cover 406 precisely abuts against the hexagonal block 502, effectively preventing the hexagonal block 502 from disengaging from the hexagonal slot, and further preventing the possibility of the locking bolt 305 loosening.

[0046] In another specific embodiment based on the above, a set of walking track wheels for movement is respectively installed on the opposite sides of the movable frame 102 located on the left and right sides of the body 101.

[0047] As attached Figure 10 As shown, in another specific embodiment based on the above, a water storage tank 701 is also fixedly installed on the upper end of the body 101. A water inlet is provided on the upper surface of the water storage tank 701, and a cover 702 is installed at the water inlet. A drain pipe 703 is connected to the side wall of the water storage tank 701, and a cap is provided at the end of the drain pipe 703. Therefore, when the grinding component needs to apply high-intensity grinding to the concrete floor, water can be poured into the water storage tank 701 to increase the overall weight of the body 101, thereby ensuring that the device remains stable during high-intensity grinding.

[0048] In another specific embodiment based on the above, the side of the body 101 may also be provided with structures such as handles as needed.

[0049] One specific embodiment of the present invention is as follows:

[0050] When grinding a concrete floor, the machine body 101 can be moved to the grinding position. Then, the telescopic cylinder 104 drives the lifting plate 105 to move down, and the outer ring plate 107 below the lifting plate 105 moves down along with it. Since the inner ring plate 108 is rotatably set in the outer ring plate 107, the inner ring plate 108 also moves down along with it until the grinding disc 114 in the rotating component 112 contacts the concrete floor. As the lifting plate 105 moves further down, the inner ring plate 108 will move downward outside the movable rod 110, causing the spring on the outside of the movable rod 110 to... When the spring 601 is compressed, the grinding disc 114 in the rotating component 112 applies a certain downward pressure to the concrete surface. The compression of the spring 601 is proportional to the downward pressure, which allows for flexible adjustment of the grinding force of the grinding disc 114. Once the appropriate grinding force is adjusted, the inner ring plate 108 can be rotated in the outer ring plate 107 via the drive assembly. The inner ring plate 108 can then drive the rotating component 112 to rotate together via the movable rod 110. The grinding disc 114 in the rotating component 112 also rotates along with it, thus enabling the grinding operation of the concrete surface.

[0051] Furthermore, during the polishing process, the dust generated can be continuously sucked up with the dust suction component, effectively preventing the dust from harming the user's health and resulting in better performance.

[0052] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in the invention are only for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0053] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that those skilled in the art will understand that various changes, modifications, substitutions, refinements, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations should be considered within the scope of protection of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A floor grinding device, characterized in that: The assembly includes a body (101), a movable frame (102), a telescopic cylinder (104), a lifting plate (105), a drive assembly, an elastic assembly, and a grinding assembly. The elastic assembly includes an outer ring plate (107), an inner ring plate (108), several movable rods (110), a spring (601), and a support plate (602). Movable frames (102) are respectively installed downwards on the left and right sides of the body (101). Vertically arranged telescopic cylinders (104) are respectively connected to the opposite sides of the movable frames (102) on both sides. The telescopic ends of the telescopic cylinders (104) on both sides are connected upwards to the lifting plate (105) located below the body (101). The lower end of the lifting plate (105) is connected to the outer ring plate (107), and the lifting plate (105) is connected to the outer ring plate (107). There is a gap between the outer ring plates (107). The inner ring plate (108) is rotatably connected to the inner side of the outer ring plate (107). Several movable rods (110) are vertically slidably installed on the inner ring plate (108). Several movable rods (110) can pass through the top of the inner ring plate (108) and are fixedly connected to a ring plate (109). The lower ends of several movable rods (110) are connected to a grinding component for grinding. The lower end of the movable rod (110) is provided with an external thread. The support plate (602) is threaded to the lower end of the movable rod (110). The spring (601) is sleeved on the movable rod (110) and its two ends are respectively connected to the support plate (602) and the inner ring plate (108). The driving component is used to drive the rotation of the inner ring plate (108). The grinding assembly includes a rotating component (112), a locking bolt (305), and a grinding disc (114). The bottom ends of several movable rods (110) are detachably connected to the rotating component (112). The bottom end of the rotating component (112) is provided with a mounting groove (113). The center of the upper end of the rotating component (112) is provided with a threaded hole (304) that extends through the mounting groove (113). The center of the grinding disc (114) is provided with a groove (303). The grinding disc (114) is installed in the mounting groove (113). The locking bolt (305) is used to pass through the groove (303) from the lower end of the grinding disc (114) and then be threaded into the threaded hole (304), thereby fixing the grinding disc (114) in the mounting groove (113). The drive assembly includes a drive motor (201), a gear (202), and a toothed groove (203). The inner ring plate (108) is provided with a toothed groove (203) on its inner side. The drive motor (201) is mounted on the lifting plate (105). The drive end of the drive motor (201) is set downward and connected to the gear (202). The gear (202) meshes with the toothed groove (203). The drive motor (201) is used to drive the gear (202) to drive the inner ring plate (108) to rotate. The diameter of the gear (202) is smaller than the diameter of the tooth groove (203). The gear (202) meshes with part of the tooth groove (203), and there is a gap between the gear (202) and the tooth groove (203) at the far end. It also includes a vacuuming assembly, which includes a vacuum cleaner (410), a vacuum hose (408), and a cover (406). A vacuuming ring groove (401) is formed at the bottom of the rotating part (112) and around the mounting groove (113). A ring-shaped cavity (403) is formed inside the rotating part (112). Several dust-guiding channels (402) are also formed on the rotating part (112) to connect the vacuuming ring groove (401) and the ring cavity (403). Several dust-guiding ports (404) connected to the ring cavity (403) are formed at the upper end of the rotating part (112). The upper end face of the cover (406) is provided with a raised threaded ring (405) around the dust guide port (404). The cover (406) is threaded in the threaded ring (405) and covers the dust guide port (404). The upper end of the cover (406) is connected to a vertical dust guide pipe (407). One end of the suction pipe (408) can slide vertically and rotate in a sealed and slidable manner in the dust guide pipe (407). The other end passes through the gap between the gear (202) and the far end tooth groove (203) and is connected to the vacuum cleaner (410). The vacuum cleaner (410) is installed on the side of the body (101).

2. The floor grinding device according to claim 1, characterized in that: The inner wall of the mounting groove (113) is provided with several locking blocks (302) arranged in a ring at equal intervals, and the side wall of the grinding disc (114) is provided with corresponding locking grooves (301) for cooperating with the locking blocks (302).

3. The floor grinding device according to claim 1, characterized in that: The upper end face of the rotating part (112) is also provided with a hexagonal groove that is opposite to the threaded hole (304), and a hexagonal block (502) is placed in the hexagonal groove. A vertical square rod (503) is fixedly installed on the lower surface of the hexagonal block (502). A vertical square groove (501) is correspondingly provided on the upper end of the locking bolt (305). The hexagonal block (502) is used to insert into the hexagonal groove after the locking bolt (305) is installed in the threaded hole (304) and so that the square rod (503) is inserted into the square groove (501).

4. The floor grinding device according to claim 3, characterized in that: A stop bar (504) is also fixedly installed on the top inner wall of the cover (406), the stop bar (504) being used to abut against the upper end of the hexagonal block (502).

5. A floor grinding device according to claim 1, characterized in that: On the opposite sides of the movable frame (102) located on the left and right sides of the machine body (101), a set of walking track wheels for movement are respectively installed.

6. A floor grinding device according to claim 1, characterized in that: A water storage tank (701) is also fixedly installed on the upper end of the body (101). A water inlet is provided on the upper surface of the water storage tank (701), and a tank cover (702) is installed at the water inlet. A drain pipe (703) is connected to the side wall of the water storage tank (701), and a cap is provided at the end of the drain pipe (703).

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