Building construction ground dedusting and cleaning device

Abstract

The invention relates to the technical field of building floor surface mortar polishing, in particular to a building construction ground dedusting and cleaning device which comprises a frame and a lifting assembly arranged on the frame, and a supporting plate is connected to the lifting assembly; the coarse grinding assembly is arranged on the supporting plate and comprises a coarse grinding disc, and the coarse grinding assembly can perform coarse grinding action on the mortar floor through the coarse grinding disc; the follow-up pressurizing mechanism is arranged on the rough grinding assembly, and the follow-up pressurizing mechanism can adjust the grinding pressure on the rough grinding disc through the rough grinding assembly when the rough grinding disc moves; the fine grinding assembly is arranged on the supporting plate and used for conducting fine grinding treatment on the mortar floor, when the thickness of mortar acting on the floor through the coarse grinding disc changes, the acting force of the coarse grinding disc on the mortar can be automatically adjusted through the follow-up pressurization mechanism so as to adapt to the mortar with different thicknesses, and it is ensured that the mortar is comprehensively cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of mortar polishing on the surface of building floors, in particular to a dust removal and cleaning device for building construction floors. Background Art

[0002] During the construction process, the building walls need to be plastered. When plastering, the mortar needs to be evenly adhered to the wall surface, and it is necessary to ensure that the mortar is firmly bonded to the base layer, the surface is flat, and there is no cracking.

[0003] During the plastering process, some mortar will inevitably splash onto the floor, and after a period of drying, hard mortar will be formed and adhered to the surface of the floor. In order to ensure the flatness of the floor mortar slab, these mortars need to be polished, crushed and cleaned.

[0004] In this regard, Chinese patent CN114670071B proposes a dust removal and cleaning device for construction ground, including a cleaning device including a shell, a pressure bearing, a connecting rod and an adjusting bearing. The beneficial effects are: by setting a telescopic rod to drive the lifting and lowering connecting rod, the extrusion effect on the sleeve and the pressure bearing is achieved. During the downward pressing process of the sleeve, the pressure strength of the high-strength arc cutting blade rotating downward and cutting is regulated according to the different mortar bonding strengths of the on-site floor panels, thereby ensuring that the high-strength arc cutting blade can play a certain toughness adjustment when rotating to clean the ground mortar. During the downward pressing process of the adjusting bearing, the pressure rod is pressed on the grinding disc and squeezes the rubber gasket, so that the grinding disc descends, thereby adapting to the cleaning of mortars of different thicknesses.

[0005] However, in actual use, the cleaning intensity of the cutting blade and the grinding disc needs to be adjusted after measuring the mortar thickness on the floor surface. This results in the cutting blade and the grinding disc being unable to respond quickly when the floor mortar thickness changes and adaptively switch to the required processing intensity, which may lead to the problem of some mortar residue on the floor surface. Summary of the Invention

[0006] The purpose of the present invention is to provide a dust removal and cleaning device for construction ground to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: The construction ground dust removal and cleaning device includes: A vehicle frame, and a lifting assembly disposed on the vehicle frame, wherein the lifting assembly is connected to a support plate; Also includes: a coarse grinding assembly, disposed on the support plate and comprising a coarse grinding disc, wherein the coarse grinding assembly is capable of performing a coarse grinding action on the mortar floor through the coarse grinding disc; A follow-up pressurizing mechanism is provided on the rough grinding assembly, and the follow-up pressurizing mechanism can adjust the grinding pressure on the rough grinding disc through the rough grinding assembly when the rough grinding disc moves; The fine grinding component is arranged on the support plate and is used for fine grinding the mortar floor.

[0008] As a further solution of the present invention: the rough grinding assembly includes a first motor fixed on the support plate, a rotating sleeve connected to the output shaft of the first motor is rotatably mounted on the support plate, a rotating rod is axially sliding in the rotating sleeve, and the rotating rod is fixedly connected to the rough grinding disc.

[0009] As a further embodiment of the present invention, the follow-up boosting mechanism includes a fixed ring fixed to the rotating sleeve, the rotating sleeve having a first movable ring that abuts against the fixed ring for axial sliding, a spring being sleeved on the rotating sleeve and the rotating rod, and two ends of the spring abutting against the first movable ring and the coarse grinding disc, respectively; It also includes a sliding assembly and a guide assembly which are arranged on the rotating sleeve and are used to drive the first movable ring to slide axially along the rotating sleeve.

[0010] As a further solution of the present invention: the sliding assembly includes a through groove opened on the outer circumferential wall of the rotating sleeve, an axial sliding limit ring and a second movable ring of the rotating sleeve, and the limit ring passes through the through groove and is fixedly connected to the rotating rod.

[0011] As a further solution of the present invention: the guide assembly includes a support column fixed on the outer circumferential wall of the rotating sleeve, the support column has an axially sliding movable sleeve, the movable sleeve is hinged with a first connecting rod and a second connecting rod, the first connecting rod is hinged to the first movable ring, and the second connecting rod is hinged to the second movable ring.

[0012] As a further solution of the present invention: the fine grinding assembly includes a second motor fixed to the support plate, a transmission rod connected to the output shaft of the second motor is rotatably mounted on the support plate, and a fine grinding disc is fixed to the end of the transmission rod.

[0013] As a further solution of the present invention: the lifting assembly includes a guide column fixed on the frame, the guide column is slidably connected to the support plate, and a cylinder fixedly connected to the support plate is fixed on the frame.

[0014] As a further solution of the present invention: a fixing rod is fixed on the support plate, and a guide plate is fixed at the end of the fixing rod, which is slidably connected to the transmission rod and the rotating sleeve and is used to perform a supporting action on the rotating sleeve and the transmission rod.

[0015] As a further solution of the present invention: a vacuum cleaner is fixed on the support plate, an air suction pipe is connected to the vacuum cleaner, and a vacuum head is fixed on the air suction pipe.

[0016] Compared with the prior art, the beneficial effect of the present invention is that the present application can adaptively adjust the grinding intensity of the coarse grinding disc through the follow-up booster mechanism to ensure that the coarse grinding disc can provide sufficient cleaning force when the mortar thickness on the floor changes. Specifically, when the frame moves along the direction of required grinding and cleaning, the coarse grinding assembly drives the coarse grinding disc to rotate to grind and crush the mortar on the surface of the floor with thicker thickness. After the surface mortar is ground and crushed by the coarse grinding disc, the ground and crushed floor mortar is sucked into the vacuum head under the action of the vacuum cleaner and then sucked into the vacuum cleaner through the suction pipe. Subsequently, under the action of the fine grinding assembly, the remaining small amount of mortar is further ground to ensure that the floor surface of the floor remains flat after grinding. Due to the different mortar thickness on the floor surface, the coarse grinding disc will automatically adjust the ground clearance according to the mortar thickness, and under the action of the follow-up booster mechanism, adaptively adjust the pressure applied to the coarse grinding disc to ensure that the coarse grinding disc can adaptively adjust the grinding and crushing intensity of the mortar according to the mortar thickness.

[0017] Through the different actions of the coarse sanding disc in response to changes in mortar thickness, the spring can be linearly compressed when the mortar thickness is within a certain range to ensure that the coarse sanding disc can process the mortar on the floor with a matching sanding intensity. At the same time, it can also prevent the coarse sanding disc from being severely worn due to continuous high-intensity sanding. When processing floor mortar with thicker thickness, the elastic potential energy of the spring can be quickly increased through bidirectional extrusion to ensure that the coarse sanding disc can provide sufficient sanding pressure to the mortar. In this way, the sanding intensity of the coarse sanding disc can be adaptively adjusted when processing mortars of different thicknesses to ensure that redundant mortar on the floor is fully processed.

[0018] By cleaning the broken mortar before the fine grinding disc works, it can avoid the broken mortar from interacting with the fine grinding disc again, which will lead to increased dust on the floor. At the same time, it can also reduce the wear of the fine grinding disc, thereby increasing the service life of the fine grinding disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The figure is a structural diagram of an embodiment of a dust removal and cleaning device for construction ground.

[0020] Figure 2 This is a structural schematic diagram from another angle of an embodiment of the dust removal and cleaning device for construction ground.

[0021] Figure 3This is a schematic diagram of the connection relationship between the coarse grinding assembly, fine grinding mechanism, follow-up pressurizing mechanism, and lifting assembly in an embodiment of the construction floor dust removal and cleaning device.

[0022] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0023] Figure 5 This is a schematic structural diagram of the coarse grinding assembly, follow-up boosting mechanism, and fine grinding assembly in an embodiment of a construction ground dust removal and cleaning device.

[0024] Figure 6 This is a schematic structural diagram of the coarse grinding assembly and the follow-up boosting mechanism in an embodiment of the construction ground dust removal and cleaning device.

[0025] Figure 7 This is a schematic diagram of the explosion structure of the coarse grinding component and the follow-up boosting mechanism in an embodiment of the construction ground dust removal and cleaning device.

[0026] Figure 8 It is a front view structural schematic diagram of the follow-up boosting mechanism and the coarse grinding assembly in an embodiment of the construction ground dust removal and cleaning device.

[0027] Figure 9 This is a schematic diagram of the structure of a vacuum cleaner, an air suction pipe, and a vacuum head in an embodiment of a dust removal and cleaning device for construction floors.

[0028] In the figure: 1. frame; 2. guide column; 3. support plate; 4. cylinder; 5. first motor; 6. rotating sleeve; 601, through slot; 7. rotating rod; 8. coarse grinding disc; 9. limit ring; 10. fixed ring; 11. first movable ring; 12. spring; 13. support column; 14. movable sleeve; 15. first connecting rod; 16. second connecting rod; 17. vacuum cleaner; 18. suction pipe; 19. vacuum head; 20. second motor; 21. transmission rod; 22. fine grinding disc; 23. fixed rod; 24. guide plate; 25. second movable ring. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] See also Figures 1 to 9 In an embodiment of the present invention, a dust removal and cleaning device for a construction floor comprises: A vehicle frame 1, and a lifting assembly provided on the vehicle frame 1, wherein the lifting assembly is connected to a support plate 3; Also includes: A coarse grinding assembly is provided on the support plate 3 and includes a coarse grinding disc 8. The coarse grinding assembly can perform a coarse grinding action on the mortar floor through the coarse grinding disc 8; A follow-up pressurizing mechanism is provided on the rough grinding assembly, and the follow-up pressurizing mechanism can adjust the grinding pressure on the rough grinding disc 8 through the rough grinding assembly when the rough grinding disc 8 moves; A fine grinding assembly is provided on the support plate 3 and is used for fine grinding the mortar floor; See also Figure 1-Figure 3 、 Figure 9 A dust collector 17 is fixed on the support plate 3 , an air suction pipe 18 is connected to the dust collector 17 , and a dust collector head 19 is fixed on the air suction pipe 18 .

[0032] Specifically, during construction at a construction site, some mortar may splash onto the floor during the process of plastering the wall. As the mortar dries, the mortar will be adsorbed on the floor, resulting in an uneven floor. To this end, the mortar on the floor needs to be polished and cleaned. During the polishing process, the frame 1 will move along the floor to be polished and drive the coarse grinding component to move. The coarse grinding component will drive the coarse grinding disc 8 to rotate. Under the action of the coarse grinding disc 8, the mortar with a thicker thickness will be polished and crushed. Under the action of the follow-up booster mechanism, the mortar is provided with the pressure required for polishing to ensure that the mortar on the floor is polished and crushed smoothly. When the mortar on the floor is polished by the coarse grinding disc 8, After crushing, under the action of the vacuum cleaner 17, a negative pressure is formed in the vacuum head 19 through the suction pipe 18, and under the action of the negative pressure, the ground and crushed mortar is sucked into the vacuum head 19 and into the vacuum cleaner 17 through the suction pipe 18. Subsequently, under the action of the fine grinding component, the small amount of remaining mortar is further polished to ensure that the floor of the floor remains flat after grinding. Due to the different thickness of the mortar on the ground, the coarse grinding disc 8 will automatically adjust the ground clearance according to the thickness of the mortar, and under the action of the follow-up booster mechanism, the pressure applied to the coarse grinding disc 8 is adaptively adjusted to ensure that the coarse grinding disc 8 can adaptively adjust the grinding and crushing strength of the mortar according to the thickness of the mortar.

[0033] See also Figure 1-Figure 3 The lifting assembly includes a guide column 2 fixed on the frame 1, the guide column 2 is slidably connected to the support plate 3, and a cylinder 4 fixedly connected to the support plate 3 is fixed on the frame 1.

[0034] It should be noted that before grinding, in order to prevent the rough grinding disc 8 from interfering with the ground when it is in a stationary state due to uneven ground, it is necessary to control the support plate 3 to be located at the end of the stroke away from the ground through the cylinder 4. When it is necessary to grind and clean the mortar on the floor, the mortar thickness can be preliminarily measured, and then the initial ground clearance of the rough grinding disc 8 can be adjusted according to the measurement results. To this end, the cylinder 4 controls the support plate 3 to slide axially along the guide column 2 to adjust the ground clearance of the rough grinding disc 8 through the rough grinding assembly to ensure the best grinding and cleaning effect.

[0035] See also Figure 1-Figure 3 、 Figure 5-Figure 8 The rough grinding assembly includes a first motor 5 fixed on the support plate 3, and a rotating sleeve 6 connected to the output shaft of the first motor 5 is rotatably mounted on the support plate 3. A rotating rod 7 slides axially in the rotating sleeve 6, and the rotating rod 7 is fixedly connected to the rough grinding disc 8.

[0036] See also Figures 1-8The follow-up boosting mechanism includes a fixed ring 10 fixed on the rotating sleeve 6, and the axial sliding of the rotating sleeve 6 has a first movable ring 11 that contacts with the fixed ring 10. A spring 12 is provided on the rotating sleeve 6 and the rotating rod 7, and the two ends of the spring 12 are respectively in contact with the first movable ring 11 and the coarse grinding disc 8; it also includes a sliding assembly and a guide assembly provided on the rotating sleeve 6 for driving the first movable ring 11 to slide axially along the rotating sleeve 6, and the sliding assembly includes a spring provided on the rotating sleeve 6. The through groove 601 is on the outer circumferential wall of the sleeve 6, and the axial sliding of the rotating sleeve 6 is provided with a limiting ring 9 and a second movable ring 25. The limiting ring 9 passes through the through groove 601 and is fixedly connected to the rotating rod 7. The guide assembly includes a support column 13 fixed on the outer circumferential wall of the rotating sleeve 6, and the axial sliding of the support column 13 is provided with a movable sleeve 14. The movable sleeve 14 is hinged with a first connecting rod 15 and a second connecting rod 16. The first connecting rod 15 is hinged to the first movable ring 11, and the second connecting rod 16 is hinged to the second movable ring 25.

[0037] Specifically, the outer circumferential wall of the coarse grinding disc 8 is arranged in an arc shape. Therefore, when the coarse grinding disc 8 moves along the desired grinding direction and acts on mortar of different thicknesses on the floor, the coarse grinding disc 8 can automatically give way in the vertical direction, so that the grinding surface of the coarse grinding disc 8 facing the floor can smoothly act on mortar of different thicknesses. When the cam 11 is in the closed position, the spring 12 is in the closed position, and the spring 12 is in the closed position, so that the spring 12 is in the closed position, and the spring 12 is in the closed position, so that the cam 11 is in the closed position, and the spring 12 is in the closed position, so that the cam 11 is in the closed position, and the spring 12 is in the closed position, so that the cam 11 is in the closed position, so that the cam 11 is in the closed position, and the spring 12 is in the closed position, so that the cam 11 is in the closed position, so that the cam 11 is in the closed position,

[0038] When the mortar on the floor needs to be sanded, the coarse sanding disc 8 is mainly used to process thicker mortar. To this end, the ground clearance of the coarse sanding disc 8 is less than the thickness of the mortar to be processed. At this time, the frame 1 moves along the ground to be processed and drives the coarse sanding disc 8 to move. At the same time, under the action of the first motor 5, the rotating sleeve 6 is driven to rotate, thereby driving the rotating rod 7 to rotate through the cooperation between the through slot 601 and the limit ring 9, so that the coarse sanding disc 8 rotates; When the coarse grinding disc 8 is in contact with the mortar, the coarse grinding disc 8 will give way in the vertical direction, so that the grinding surface of the coarse grinding disc 8 facing the ground can smoothly act on the mortar. If the thickness of the mortar is within a certain range, that is, the mortar thickness is slightly greater than the ground clearance of the coarse grinding disc 8, when the coarse grinding disc 8 gives way, it will drive the rotating rod 7 to move toward the rotating sleeve 6, thereby controlling the limit ring 9 to move along the length direction of the through groove 601 and toward the direction close to the support plate 3. The coarse grinding disc 8 will also compress the spring 12. Under the action of the spring 12, the grinding force of the coarse grinding disc 8 on the mortar can be increased to a certain extent, so as to ensure that the mortar can be smoothly ground and broken; When the mortar thickness exceeds the set range, that is, the mortar thickness is significantly different from the ground clearance of the coarse grinding disc 8, the spacing of the coarse grinding disc 8 is larger, which increases the spacing of the limit ring 9 along the length direction of the through groove 601. When the limit ring 9 abuts against the second movable ring 25, the limit ring 9 will drive the second movable ring 25 to slide axially along the rotating sleeve 6. The second movable ring 25 will also drive the movable sleeve 14 to slide axially along the support column 13 through the second connecting rod 16, and move toward the direction close to the rotating sleeve 6. Under the action of the movable sleeve 14, the first movable ring 11 is controlled by the first connecting rod 15 to slide axially along the rotating sleeve 6, and move toward the direction close to the coarse grinding disc 8. In this regard, the spring 12 will be subjected to the bidirectional extrusion of the first movable ring 11 and the coarse grinding disc 8, so that the elastic potential energy of the spring 12 increases rapidly, ensuring that the coarse grinding disc 8 can provide sufficient grinding force when performing grinding and cleaning on mortar with thicker thickness.

[0039] Preferably, by using the different actions of the coarse grinding disc 8 in response to changes in mortar thickness, the spring 12 can be linearly compressed when the mortar thickness is within a certain range to ensure that the coarse grinding disc 8 can process the mortar with a matching grinding intensity. At the same time, it can also prevent the coarse grinding disc 8 from being severely worn due to continuous high-intensity grinding. When processing mortar with a thicker thickness, the elastic potential energy of the spring 12 can be quickly increased by bidirectional extrusion to ensure that the coarse grinding disc 8 can provide sufficient grinding pressure to the mortar. In this way, the grinding intensity of the coarse grinding disc 8 can be adaptively adjusted when processing mortars of different thicknesses to ensure that the mortar is fully processed.

[0040] Among them, an infrared sensor can also be installed on the support plate 3. The infrared sensor is used to detect the distance between the support plate 3 and the coarse grinding disc 8 in real time, and adjust the output power of the first motor 5 according to the change of the distance, so as to increase the rotation speed of the coarse grinding disc 8 when the coarse grinding disc 8 is dealing with mortar with a larger thickness, thereby further enhancing the grinding intensity of the coarse grinding disc 8 to ensure that the mortar is effectively processed. The infrared sensor is an application of existing technology and will not be elaborated in this application.

[0041] See also Figure 1-Figure 3 、 Figure 5 The fine grinding assembly includes a second motor 20 fixed on the support plate 3 , a transmission rod 21 connected to the output shaft of the second motor 20 is rotatably mounted on the support plate 3 , and a fine grinding disc 22 is fixed to the end of the transmission rod 21 .

[0042] See also Figure 5 A fixing rod 23 is fixed on the support plate 3, and a guide plate 24 is fixed at the end of the fixing rod 23, which is slidably connected to the transmission rod 21 and the rotating sleeve 6 and is used to support the rotating sleeve 6 and the transmission rod 21.

[0043] Furthermore, the fine grinding disc 22 is arranged behind the coarse grinding disc 8 in the direction of travel. The fine grinding disc 22 has a very small ground clearance and is used to process a small amount of residual mortar after the coarse grinding disc 8 is processed, so as to ensure that the ground is in a flat state after the fine grinding disc 22 is processed. The vacuum cleaner 17 includes a negative pressure vacuum module and a collection module. The negative pressure vacuum module is used for suction processing to form a negative pressure in the system. The collection module is a dust box or dust bag for collecting the mortar after grinding and crushing. This is an application of the existing technology. After the coarse grinding disc 8 performs preliminary grinding and crushing processing on the mortar, the vacuum cleaner 17 works and forms a negative pressure in the vacuum head 19 through the suction pipe 18. Under the action of the negative pressure, the crushed mortar remaining after the coarse grinding disc 8 is polished is absorbed and transported to the collection module of the vacuum cleaner 17 through the suction pipe 18. By cleaning the broken mortar on the floor before the fine grinding disc 22 starts working, it is possible to prevent the broken mortar from interacting with the fine grinding disc 22 again, which would increase the dust on the floor. At the same time, it can also reduce the wear of the fine grinding disc 22, thereby increasing the service life of the fine grinding disc 22. When the broken mortar on the floor is absorbed, the thickness of the remaining mortar on the ground is very small and the residual amount is also small. In this regard, under the action of the second motor 20, the transmission rod 21 controls the rotation of the fine grinding disc 22 to finely grind and level the remaining mortar. In this way, under the dual treatment of coarse and fine grinding, the mortar can be polished and cleaned more comprehensively to ensure that the ground is in a flat state after treatment.

[0044] When the frame 1 is moving, whether the coarse grinding disc 8 or the fine grinding disc 22 acts on the mortar, a horizontal force opposite to the direction of travel will be generated, which may cause the rotating sleeve 6 or the transmission rod 21 itself to shake, and then cause the grinding surfaces of the coarse grinding disc 8 and the fine grinding disc 22 to be misaligned. Under the action of the fixed rod 23 and the guide plate 24, the stability of the rotating sleeve 6 and the transmission rod 21 can be increased, thereby offsetting the horizontal force to ensure that the rotating sleeve 6 and the transmission rod 21 always maintain a stable state when rotating.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Construction ground dust removal and cleaning device, including: A vehicle frame, and a lifting assembly disposed on the vehicle frame, wherein the lifting assembly is connected to a support plate; It is characterized by further comprising: a coarse grinding assembly, disposed on the support plate and comprising a coarse grinding disc, wherein the coarse grinding assembly is capable of performing a coarse grinding action on the mortar floor through the coarse grinding disc; A follow-up pressurizing mechanism is provided on the rough grinding assembly, and the follow-up pressurizing mechanism can adjust the grinding pressure on the rough grinding disc through the rough grinding assembly when the rough grinding disc moves; The fine grinding component is arranged on the support plate and is used for fine grinding the mortar floor.

2. The construction floor dust removal and cleaning device according to claim 1, characterized in that: The rough grinding assembly includes a first motor fixed to the support plate, a rotating sleeve connected to the output shaft of the first motor is rotatably mounted on the support plate, a rotating rod is axially slidable in the rotating sleeve, and the rotating rod is fixedly connected to the rough grinding disc.

3. The construction floor dust removal and cleaning device according to claim 2, characterized in that: The follow-up boosting mechanism includes a fixed ring fixed to the rotating sleeve, a first movable ring that contacts and cooperates with the fixed ring when the rotating sleeve slides axially, a spring is sleeved on the rotating sleeve and the rotating rod, and two ends of the spring are respectively in contact with the first movable ring and the coarse grinding disc; It also includes a sliding assembly and a guide assembly which are arranged on the rotating sleeve and are used to drive the first movable ring to slide axially along the rotating sleeve.

4. The construction floor dust removal and cleaning device according to claim 3, characterized in that: The sliding assembly includes a through groove opened on the outer circumferential wall of the rotating sleeve, an axial sliding limit ring of the rotating sleeve and a second movable ring, and the limit ring passes through the through groove and is fixedly connected to the rotating rod.

5. The construction floor dust removal and cleaning device according to claim 4, characterized in that: The guide assembly includes a support column fixed on the outer circumferential wall of the rotating sleeve, and the support column has an axially sliding movable sleeve. The movable sleeve is hinged with a first connecting rod and a second connecting rod, the first connecting rod is hinged to the first movable ring, and the second connecting rod is hinged to the second movable ring.

6. The construction floor dust removal and cleaning device according to claim 1, characterized in that: The fine grinding assembly includes a second motor fixed to the support plate, a transmission rod connected to the output shaft of the second motor is rotatably mounted on the support plate, and a fine grinding disc is fixed to the end of the transmission rod.

7. The construction floor dust removal and cleaning device according to claim 1, characterized in that: The lifting assembly includes a guide column fixed on the frame, the guide column is slidably connected to the support plate, and a cylinder fixedly connected to the support plate is fixed on the frame.

8. The construction floor dust removal and cleaning device according to claim 6, characterized in that: A fixing rod is fixed on the support plate, and a guide plate is fixed at the end of the fixing rod, which is slidably connected with the transmission rod and the rotating sleeve and is used to support the rotating sleeve and the transmission rod.

9. The construction floor dust removal and cleaning device according to claim 1, characterized in that: A dust collector is fixed on the support plate, an air suction pipe is connected to the dust collector, and a dust collector head is fixed on the air suction pipe.

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