Dust-free wall surface polishing and dust recycling apparatus

Abstract

The invention discloses a dustless wall surface polishing and dust recovery apparatus, and relates to the technical field of building decoration, the dustless wall surface polishing and dust recovery apparatus comprises a wall fitting cover, the bottom of the wall fitting cover is provided with a dust recovery assembly, the back of the wall fitting cover is provided with a shell, and the back of the shell is provided with a polishing motor; an output shaft of the grinding motor is located in the wall attaching cover and connected with a grinding head. According to the dustless wall surface polishing and dust recycling instrument, in the polishing operation, a large amount of dust can be generated on the surface of a wall, not only can the dust fall down, but also a part of the dust can be adhered to the wall surface, and through a built-in dust suction pump, the falling dust is sucked into a dust collection bag while a polishing piece is used for polishing, so that the dust can be recycled; and meanwhile, a set of sweeping mechanism is designed through the equipment, through movement of an eccentric shaft and a grooved plate, a brush handle can sweep the wall surface repeatedly, dust remaining on the wall surface after polishing is cleaned up, and through the function, the working efficiency is improved, and the working environment is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building decoration, and particularly to a dust-free wall grinding and dust recovery device. Background Art

[0002] Dust-free wall grinding and dust recovery devices are increasingly widely used in the fields of building construction and wall decoration. Their main function is to collect the generated dust while grinding the wall, so as to improve the working environment and increase the operation efficiency. This device usually includes a grinding head, a dust suction pump, a dust collection bag, and related mechanical structures, and can perform real-time dust recovery during the grinding operation, reducing the impact of suspended particulate matter in the air on the health of workers, and at the same time reducing the cleaning difficulty at the operation site.

[0003] Although the existing dust-free wall grinding and dust recovery devices have achieved certain effects in dust control and wall grinding, they still have some deficiencies. Traditional grinding devices often cannot handle the slight unevenness of the wall well during the grinding process, resulting in the grinding quality being affected. In addition, when encountering larger unevenness, the equipment may be damaged due to severe vibration, which not only affects the continuity and safety of the operation, but also may increase the maintenance cost of the equipment. At the same time, after grinding, some dust still adheres to the wall, and the existing cleaning mechanism is often not efficient enough to completely clean these residual dusts. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a dust-free wall grinding and dust recovery device, which solves the key problems of insufficient grinding accuracy, easy damage of the equipment, and low cleaning efficiency faced by the existing dust-free wall grinding and dust recovery devices although they have certain effects.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A dust-free wall grinding and dust recovery device, including a wall fitting cover, a dust recovery component is arranged at the bottom of the wall fitting cover, a housing is arranged on the back of the wall fitting cover, a grinding motor is installed on the back of the housing, the output shaft of the grinding motor is connected with a grinding head inside the wall fitting cover, a dust cleaning component is arranged on one side of the inside of the wall fitting cover close to the grinding head, and a linkage member for driving the dust cleaning component to operate is arranged inside the housing.

[0006] The dust cleaning component includes a brush, and the brush is longitudinally slidably arranged inside the wall fitting cover through a displacement member.

[0007] The linkage member includes a driving wheel fixedly arranged on the outer wall of the output shaft of the grinding motor and a transmission disc rotatably arranged on the inner wall of the housing. The driving wheel and the transmission disc are connected by a belt drive. An eccentric shaft is arranged near the edge on one side of the transmission disc. A grooved plate is horizontally and slidably sleeved on the outside of the eccentric shaft. An L-shaped rod is integrally formed on the upper part of the grooved plate. The L-shaped rod longitudinally slides through the inner top side of the housing, and the other end thereof is connected to the displacement member of the dust cleaning assembly for driving the longitudinal repeated displacement of the brush handle to realize the cleaning of the wall dust.

[0008] Preferably, the displacement member includes a guide rod vertically connected inside the wall fitting cover. A guide block is longitudinally slidably sleeved on the outside of the guide rod. One side of the brush handle is connected to one end of the guide block, and a limiting strip is connected to the upper part of the guide block. The upper end of the limiting strip longitudinally slides through the inner top side of the wall fitting cover and is connected to one end of the L-shaped rod.

[0009] Preferably, guide shafts are longitudinally slidably inserted through the upper parts of both ends of the grooved plate, and both ends of the guide shafts are respectively connected to the upper and lower sides inside the housing.

[0010] Preferably, the brush side of the brush handle extends out of the wall fitting cover.

[0011] Preferably, the grinding disc includes a limiting shell. One side of the limiting shell is an opening, and a grinding disc is horizontally and slidably embedded and installed in the opening. A disc spring is connected between the side of the grinding disc close to the limiting shell and the inner side of the limiting shell. A cavity shell is arranged on the side of the limiting shell away from its opening. A damping rod is connected to the side of the cavity shell away from the limiting shell, and the end of the damping rod away from the cavity shell is connected to the output shaft of the grinding motor.

[0012] Preferably, the elasticity of the disc spring is greater than that of the damping rod, and when both the disc spring and the damping rod are in the natural state, the side of the grinding disc away from the limiting shell extends out of the wall fitting cover.

[0013] Preferably, a piston rod is connected to the inner ring of the disc spring on one side of the grinding disc. One end of the piston rod horizontally slides through the inner wall of the limiting shell and one side of the cavity shell and is connected to a piston plate inside the cavity shell. A non-Newtonian fluid is filled on one side of the piston plate inside the cavity shell.

[0014] Preferably, the dust recovery assembly includes an L-shaped pipe connected to the bottom of the wall fitting cover. The L-shaped pipe is communicated with the inside of the wall fitting cover, and the other end of the L-shaped pipe is provided with a limiting pipe communicated with its inside. The lower end of the limiting pipe is provided with a hollow handle, and a dust collection bag is screwed to the lower end of the hollow handle through a thread.

[0015] Preferably, a dust suction pump is arranged inside the hollow handle to suck the dust falling inside the wall fitting cover into the dust collection bag.

[0016] Preferably, an arc-shaped elastic sheet is provided on the side of the cavity shell close to the piston plate. The arc surface of the elastic sheet faces the piston plate, and the inner side of the elastic sheet is connected to the inner side wall of the cavity shell by a spring. The elastic sheet divides the non-Newtonian fluid in the cavity shell into two parts. The viscosity of the non-Newtonian fluid at the piston plate is less than that of the non-Newtonian fluid at the other part.

[0017] The present invention provides a dust-free wall grinding and dust recovery device, which has the following beneficial effects compared with the prior art:

[0018] 1. In the grinding operation of this dust-free wall grinding and dust recovery device, a large amount of dust will be generated on the wall surface. Not only will this dust fall, but a part of it will also adhere to the wall. Through the built-in suction pump, while the grinding disc is grinding, the falling dust is extracted into the dust collection bag. At the same time, the device is designed with a cleaning mechanism. Through the movement of the eccentric shaft and the grooved plate, the brush can repeatedly clean the wall surface, cleaning the dust remaining on the wall surface after grinding. This function not only improves the operation efficiency but also greatly improves the working environment.

[0019] 2. In the grinding process of this dust-free wall grinding and dust recovery device, when the grinding disc encounters slight unevenness on the wall surface, the piston rod and the piston plate move slowly under the action of the non-Newtonian fluid. At this time, the non-Newtonian fluid is in a softened state and can effectively buffer the grinding disc, reducing the influence of slight vibration on the grinding quality. However, when the grinding disc encounters larger unevenness, the non-Newtonian fluid is quickly hardened under the strong impact force. At this time, the system can provide rigid support to prevent the device from being damaged due to strong vibration. This intelligent response mechanism not only improves the grinding accuracy but also ensures the safety during the operation process and avoids damage to the device.

[0020] 3. When the operator holds the hollow grip and fits the wall fitting cover to the wall surface, due to its unique design, the grinding head extends outside the wall fitting cover, enabling the grinding disc to contact the wall surface first. Relying on the elasticity of the damping rod, the whole grinding head can move into the wall fitting cover until the wall fitting cover is completely fitted to the wall surface. This adaptive fitting technology greatly improves the accuracy and efficiency of the grinding operation, and at the same time ensures the stability of the grinding process and the integrity of the wall surface.

[0021] 4. The dust-free wall grinding and dust recovery device utilizes the combination of elastic pieces and springs, as well as the viscosity difference of non-Newtonian fluids within the cavity shell, to achieve control over different vibration levels during the grinding process. When the grinding disc encounters slight vibrations caused by a slightly uneven wall surface, the low-viscosity non-Newtonian fluid provides buffering to avoid adverse effects on the grinding process. In the face of severe vibrations, the elasticity of the elastic pieces and springs first provides preliminary buffering. Subsequently, the high-viscosity non-Newtonian fluid accelerates hardening under the action of the impact force to form a rigid support, effectively protecting the equipment from damage while ensuring the continuity of the grinding operation and the smoothness of wall treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic diagram of the internal structure of the wall fitting cover of the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the dust cleaning component and the linkage component of the present invention;

[0025] Figure 4 is an exploded schematic diagram of the structure of the grinding head of the present invention;

[0026] Figure 5 is a schematic diagram of the overall structure of the grinding head of the present invention;

[0027] Figure 6 is a cross-sectional view of the first embodiment of the structure of the grinding head of the present invention;

[0028] Figure 7 is a schematic diagram of the structure of the dust recovery component of the present invention;

[0029] Figure 8 is a cross-sectional view of the second embodiment of the structure of the grinding head of the present invention.

[0030] In the figures: 1. Wall fitting cover; 2. Dust recovery component; 21. L-shaped pipe; 22. Limiting pipe; 23. Hollow grip; 24. Dust collection bag; 3. Shell; 4. Grinding motor; 5. Grinding head; 51. Limiting shell; 52. Grinding disc; 53. Disc spring; 54. Cavity shell; 55. Damper rod; 56. Piston rod; 57. Piston plate; 58. Non-Newtonian fluid; 59. Elastic piece; 510. Spring; 6. Dust cleaning component; 61. Guide rod; 62. Guide block; 63. Brush; 64. Limiting strip; 7. Linkage component; 71. Driving wheel; 72. Transmission disc; 73. Belt; 74. Eccentric shaft; 75. Grooved plate; 76. L-shaped rod; 77. Guide shaft. DETAILED DESCRIPTION OF THE INVENTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] See also Figures 1 - 3 In an embodiment of the present invention, a dust-free wall grinding and dust recovery device includes a wall fitting cover 1, a dust recovery component 2 is arranged at the bottom of the wall fitting cover 1, a shell 3 is arranged on the back of the wall fitting cover 1, a grinding motor 4 is installed on the back of the shell 3, the output shaft of the grinding motor 4 is located in the wall fitting cover 1 and is connected to a grinding head 5, a dust cleaning component 6 is arranged on one side of the wall fitting cover 1 near the grinding head 5, and a linkage part 7 for driving the dust cleaning component 6 to operate is arranged in the shell 3.

[0034] See also Figures 1 - 3 In the embodiment of the present invention, the dust cleaning component 6 includes a brush handle 63, and the brush handle 63 is longitudinally slidably disposed in the wall-fitting cover 1 through a displacement member.

[0035] See also Figures 1 - 3 In the embodiment of the present invention, the linkage member 7 includes a driving wheel 71 fixedly arranged on the outer wall of the output shaft of the grinding motor 4 and a transmission plate 72 rotatably arranged on the inner wall of the shell 3. The driving wheel 71 and the transmission plate 72 are connected by a belt 73. An eccentric shaft 74 is arranged on one side of the transmission plate 72 near the edge. The outer lateral sliding sleeve of the eccentric shaft 74 is provided with a grooved plate 75. The upper part of the grooved plate 75 is integrally formed with an L-shaped rod 76. The L-shaped rod 76 slides longitudinally through the inner top side of the shell 3, and the other end of the L-shaped rod 76 is connected to the displacement member of the cleaning component 6, which is used to drive the brush handle 63 to repeatedly move longitudinally to achieve wall dust cleaning.

[0036] In this scheme, the dust adhering to the wall surface can be cleaned off. When in use, the grinding motor 4 drives the grinding head 5 to rotate as a whole to grind the wall surface. When the grinding motor 4 is working, the output shaft of the grinding motor 4 drives the driving wheel 71 to rotate, and the driving wheel 71 causes the belt 73 to drive the transmission disk 72 to rotate, and the transmission disk 72 drives the eccentric shaft 74 to perform eccentric movement, thereby driving the grooved plate 75 to perform repeated longitudinal back and forth movement, so that the L-shaped rod 76 continuously drives the displacement member to repeatedly move longitudinally back and forth, thereby causing the brush handle 63 to repeatedly move longitudinally back and forth, so that the brush handle 63 will clean the wall surface, and the dust adhering to the wall surface after grinding can be cleaned off.

[0037] For further information, see Figures 1 - 3, in the embodiment of the present invention, the displacement member includes a guide rod 61 vertically connected to the inside of the wall fitting cover 1. A guide block 62 is longitudinally slidably sleeved outside the guide rod 61. One side of the brush 63 is connected to one end of the guide block 62, and a limiting strip 64 is connected to the upper part of the guide block 62. The upper end of the limiting strip 64 longitudinally slides through the inner top side of the wall fitting cover 1 and is connected to one end of the L-shaped rod 76.

[0038] When the displacement member works, the grooved plate 75 makes repeated longitudinal back-and-forth movements, causing the L-shaped rod 76 to continuously drive the limiting strip 64 to make repeated longitudinal back-and-forth movements, so that the guide block 62 makes repeated longitudinal back-and-forth movements on the guide rod 61, and thus the brush 63 will clean the wall surface.

[0039] Furthermore, please refer to Figures 1 - 3 , in the embodiment of the present invention, guide shafts 77 are longitudinally slidably inserted through the upper parts of both ends of the grooved plate 75. Both ends of the guide shafts 77 are respectively connected to the upper and lower sides inside the housing 3. When the grooved plate 75 moves longitudinally, the guide shafts 77 play a role in limiting and guiding it.

[0040] Even further, please refer to Figures 1 - 3 , in the embodiment of the present invention, the bristled side of the brush 63 extends out of the wall fitting cover 1. When the wall fitting cover 1 is attached to the wall surface, the brush 63 can contact the wall surface, thus facilitating the cleaning of the wall surface.

[0041] Furthermore, please refer to Figure 1 and Figure 7 , in the embodiment of the present invention, the dust collection assembly 2 includes an L-shaped pipe 21 connected to the bottom of the wall fitting cover 1. The L-shaped pipe 21 is in communication with the inside of the wall fitting cover 1, and the other end of the L-shaped pipe 21 is provided with a limiting pipe 22 communicating with its inside. The lower end of the limiting pipe 22 is provided with a hollow grip 23. The lower end of the hollow grip 23 is threadedly connected with a dust collection bag 24. A dust suction pump is arranged inside the hollow grip 23 to extract the dust falling inside the wall fitting cover 1 into the dust collection bag 24.

[0042] In this solution, the dust falling from grinding and the dust falling from cleaning are cleaned, and are extracted into the dust collection bag 24 by the dust suction pump.

[0043] Embodiment 2 is different from Embodiment 1 in that:

[0044] Please refer to Figure 1 and Figures 4 - 6, in the embodiment of the present invention, the grinding disc 52 includes a limiting shell 51. One side of the limiting shell 51 is an opening. The grinding disc 52 is horizontally and slidably embedded in the opening. A disc spring 53 is connected between the side of the grinding disc 52 close to the limiting shell 51 and the inner side of the limiting shell 51. A cavity shell 54 is arranged on the side of the limiting shell 51 away from its opening. A damping rod 55 is connected to the side of the cavity shell 54 away from the limiting shell 51. One end of the damping rod 55 away from the cavity shell 54 is connected to the output shaft of the grinding motor 4.

[0045] Please refer to Figure 1 and Figures 4 - 6 , in the embodiment of the present invention, the elasticity of the disc spring 53 is greater than that of the damping rod 55. When both the disc spring 53 and the damping rod 55 are in the natural state, the side of the grinding disc 52 away from the limiting shell 51 extends into the wall fitting cover 1.

[0046] In this scheme: The operator holds the hollow grip 23 and fits the wall fitting cover 1 on the wall. Since the grinding head 5 extends into the wall fitting cover 1, the grinding disc 52 contacts the wall first. Under the elasticity of the damping rod 55, the whole grinding head 5 moves into the wall fitting cover 1 until the wall fitting cover 1 is completely fitted on the wall. Then, the power of the grinding motor 4 is turned on. The grinding motor 4 drives the whole grinding head 5 to rotate, so that the grinding disc 52 grinds the wall.

[0047] Embodiment 3 is different from Embodiment 1 in that:

[0048] Please refer to Figure 1 and Figures 4 - 6 , in the embodiment of the present invention, a piston rod 56 is connected to the inner ring of the disc spring 53 on one side of the grinding disc 52. One end of the piston rod 56 horizontally slides through the inner wall of the limiting shell 51 and one side of the cavity shell 54 and is located in the cavity shell 54 and connected to a piston plate 57. A non-Newtonian fluid 58 is installed on one side of the piston plate 57 in the cavity shell 54.

[0049] In this scheme: During grinding, when the grinding disc 52 encounters a slightly uneven position on the wall, the grinding disc 52 will generate slight vibrations, driving the piston rod 56 to move slowly. The piston plate 57 will not generate a strong impact force on the non-Newtonian fluid 58. At this time, the non-Newtonian fluid 58 in the cavity shell 54 is in a softened state. Then, under the elasticity of the disc spring 53, it can buffer the grinding disc 52 to ensure the stability of wall grinding. When the grinding disc 52 encounters a large uneven position on the wall, the grinding disc 52 will vibrate violently, driving the piston plate 57 at one end of the piston rod 56 to slide in the cavity shell 54 and quickly impact the non-Newtonian fluid 58. When the non-Newtonian fluid 58 is subjected to a strong impact force, the non-Newtonian fluid 58 will harden, forming a rigid support and protection effect to prevent the equipment from being damaged due to violent vibrations.

[0050] Embodiment 4 is improved on the basis of embodiment 3, and the details are as follows:

[0051] Furthermore, an arc-shaped elastic sheet 59 is provided at one side of the cavity shell 54 near the piston plate 57, the arc surface of the elastic sheet 59 faces the position of the piston plate 57, and the inner side of the elastic sheet 59 is connected to the inner wall of the cavity shell 54 by a spring 510. The elastic sheet 59 divides the non-Newtonian fluid 58 in the cavity shell 54 into two parts. The viscosity of the non-Newtonian fluid 58 at the piston plate 57 is less than the viscosity of the non-Newtonian fluid 58 at another location. In this scheme, during grinding, if the grinding sheet 52 encounters a slight uneven position on the wall surface, causing the grinding sheet 52 to vibrate slightly, the low-viscosity non-Newtonian fluid 58 has a buffering effect on the movement of the piston plate 57. When the grinding sheet 52 vibrates violently, it firstly plays a buffering role under the elasticity of the elastic sheet 59 and the spring 510, and then the high-viscosity non-Newtonian fluid 58 hardens after receiving the impact force, thereby playing a rigid support.

[0052] Working principle: the operator holds the hollow handle 23 and fits the wall fitting cover 1 to the wall. Since the grinding head 5 extends out of the wall fitting cover 1, the grinding sheet 52 first contacts the wall. Under the elasticity of the damping rod 55, the grinding head 5 moves as a whole into the wall fitting cover 1 until the wall fitting cover 1 is completely fitted to the wall. Then, the power of the grinding motor 4 is turned on, and the grinding motor 4 drives the grinding head 5 to rotate as a whole, so that the grinding sheet 52 performs grinding operation on the wall.

[0053] During grinding, if the grinding sheet 52 encounters a slight concave-convex position on the wall, the grinding sheet 52 will produce a slight vibration, driving the piston rod 56 to move slowly, and the piston plate 57 will not produce a severe impact force on the non-Newtonian fluid 58. At this time, the non-Newtonian fluid 58 in the cavity shell 54 is in a softened state, and then under the elasticity of the disc spring 53, it can play a buffering role on the grinding sheet 52 to ensure the stability of wall grinding. When the grinding sheet 52 encounters a larger concave-convex position on the wall, the grinding sheet 52 will vibrate violently, thereby driving the piston plate 57 at one end of the piston rod 56 to slide in the cavity shell 54 and quickly impact the non-Newtonian fluid 58. When the non-Newtonian fluid 58 is subjected to a severe impact force, the non-Newtonian fluid 58 will harden to form a rigid support protection to prevent the equipment from being damaged due to severe vibration.

[0054] During grinding, the vacuum pump in the hollow handle 23 is operated. When the grinding sheet 52 is grinding, dust will be generated on the wall surface and fall down. The hollow handle 23 extracts the fallen dust into the dust bag 24, thereby playing the role of dust recovery.

[0055] During grinding, although some dust falls, there is still a lot of dust adhering to the wall. When the grinding motor 4 is working, the output shaft of the grinding motor 4 drives the driving wheel 71 to rotate. The driving wheel 71 drives the belt 73 to drive the transmission disc 72 to rotate. The transmission disc 72 drives the eccentric shaft 74 to perform eccentric motion, and then drives the grooved plate 75 to perform repeated longitudinal back-and-forth motion, so that the L-shaped rod 76 continuously drives the limiting strip 64 to perform repeated longitudinal back-and-forth motion, thereby enabling the guide block 62 to perform repeated longitudinal back-and-forth motion on the guide rod 61. In this way, the brush 63 will clean the wall surface, and the dust adhering to the wall surface after grinding can be cleaned off, and then it is pumped into the dust collection bag 24 by the dust suction pump.

[0056] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0057] Those of ordinary skill in the art should understand that: the discussion of any embodiment above is only exemplary, and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0058] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dust-free wall grinding and dust recycling device, including a wall fitting cover (1), wherein a dust recycling component (2) is arranged at the bottom of the wall fitting cover (1), and it is characterized in that: A housing (3) is provided on the back surface of the wall fitting cover (1). A grinding motor (4) is mounted on the back surface of the housing (3). An output shaft of the grinding motor (4) is located inside the wall fitting cover (1) and connected to a grinding head (5). A dust cleaning component (6) is provided on one side of the interior of the wall fitting cover (1) close to the grinding head (5). A linkage member (7) for driving the dust cleaning component (6) to operate is provided inside the housing (3). The dust cleaning component (6) includes a brush handle (63). The brush handle (63) is longitudinally slidably arranged inside the wall fitting cover (1) through a displacement member. The linkage member (7) includes a driving wheel (71) fixedly arranged on the outer wall of the output shaft of the grinding motor (4) and a transmission disk (72) rotatably arranged on the inner wall of the housing (3). The driving wheel (71) and the transmission disk (72) are in transmission connection through a belt (73). An eccentric shaft (74) is provided on one side of the transmission disk (72) close to the edge. A grooved plate (75) is horizontally slidably sleeved on the outside of the eccentric shaft (74). An L-shaped rod (76) is integrally formed on the upper part of the grooved plate (75). The L-shaped rod (76) longitudinally slides through the inner top side of the housing (3), and the other end thereof is connected to the displacement member of the dust cleaning component (6) for driving the longitudinal repeated displacement of the brush handle (63) to realize the cleaning of the wall dust.

2. The dust-free wall grinding and dust recycling device according to claim 1, characterized in that: The displacement member includes a guide rod (61) vertically connected to the interior of the wall fitting cover (1). A guide block (62) is longitudinally slidably sleeved on the outside of the guide rod (61). One side of the brush handle (63) is connected to one end of the guide block (62). A limiting strip (64) is connected to the upper part of the guide block (62). The upper end of the limiting strip (64) longitudinally slides through the inner top side of the wall fitting cover (1) and is connected to one end of the L-shaped rod (76).

3. The dust-free wall grinding and dust recovery device according to claim 2, characterized in that: Guide shafts (77) are longitudinally slidably inserted through the upper parts of both ends of the grooved plate (75). Both ends of the guide shafts (77) are respectively connected to the upper and lower sides inside the housing (3).

4. The dust-free wall grinding and dust recovery device according to claim 1, characterized in that: The brush side of the brush handle (63) extends out of the wall fitting cover (1).

5. The dust-free wall grinding and dust recovery device according to claim 1, characterized in that: The grinding disc (52) includes a limiting shell (51). One side of the limiting shell (51) is open. A grinding disc (52) is horizontally slidably embedded and installed in the opening. A disc spring (53) is connected between the side of the grinding disc (52) close to the limiting shell (51) and the inner side of the limiting shell (51). A cavity shell (54) is provided on the side of the limiting shell (51) away from its opening. A damping rod (55) is connected to the side of the cavity shell (54) away from the limiting shell (51). One end of the damping rod (55) away from the cavity shell (54) is connected to the output shaft of the grinding motor (4).

6. The dust-free wall grinding and dust recycling device according to claim 5, wherein: The elasticity of the disc spring (53) is greater than that of the damping rod (55). When both the disc spring (53) and the damping rod (55) are in a natural state, the side of the grinding disc (52) away from the limiting shell (51) extends out of the wall fitting cover (1).

7. The dust-free wall grinding and dust recovery device according to claim 5, characterized in that: One side of the grinding disc (52) is connected with a piston rod (56) at the inner ring of the disc spring (53). One end of the piston rod (56) slides horizontally through the inner wall of the limit shell (51) and one side of the cavity shell (54) and is connected with a piston plate (57) inside the cavity shell (54). A non-Newtonian fluid (58) is installed on one side of the piston plate (57) inside the cavity shell (54).

8. The dust-free wall grinding and dust recovery device according to claim 1, characterized in that: The dust collection assembly (2) includes an L-shaped pipe (21) connected to the bottom of the wall fitting cover (1). The L-shaped pipe (21) is communicated with the inside of the wall fitting cover (1), and the other end of the L-shaped pipe (21) is provided with a limit pipe (22) communicated with its inside. The lower end of the limit pipe (22) is provided with a hollow handle (23), and the lower end of the hollow handle (23) is screwed with a dust collection bag (24).

9. The dust-free wall grinding and dust recovery device according to claim 8, characterized in that: A dust suction pump is arranged inside the hollow handle (23) to suck the dust falling inside the wall fitting cover (1) into the dust collection bag (24).

10. The dust-free wall grinding and dust recovery device according to claim 7, characterized in that: An arc-shaped elastic sheet (59) is arranged on one side of the cavity shell (54) close to the piston plate (57). The arc surface of the elastic sheet (59) faces the position of the piston plate (57), and the inner side of the elastic sheet (59) is connected with the inner side wall of the cavity shell (54) through a spring (510). The elastic sheet (59) divides the non-Newtonian fluid (58) inside the cavity shell (54) into two parts. The viscosity of the non-Newtonian fluid (58) at the piston plate (57) is less than the viscosity of the non-Newtonian fluid (58) at the other part.

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