A wall polishing device for building decoration

Abstract

A kind of wall polishing device for building decoration, including sandpaper, sandpaper is installed on carousel by magic tape, carousel is divided into left side plate, middle side plate, right side plate three parts, left side plate, right side plate can be folded upwards, carousel is arranged in dust cover, motor that can drive carousel rotation is equipped on dust cover, dust cover is equipped with suction pipe, it is characterized in that: dust cover is composed of left side cover, middle side cover, right side cover, left side cover, right side cover is respectively inserted with middle side cover and cooperates, first limiting device and second limiting device are equipped on left side plate, right side plate, first limiting device can maintain the non-folded state of carousel.The present application is simple in structure, ingenious in design, by folding sandpaper and changing transmission mode, it can realize the electric polishing of right-angle wall, without manual polishing, further improve polishing efficiency, save manpower and reduce the dead angle of polishing, can meet the actual demand, suitable for promotion.

Description

Technical Field

[0001] This invention belongs to the field of tools for home decoration, specifically a wall sanding device for building decoration. Background Technology

[0002] After interior wall painting, the walls need to be sanded to ensure a smooth surface. A wall sanding device for building decoration is used to sand walls during the decoration process. Existing wall sanding devices are generally divided into manual and electric sanding devices. While manual sanding devices are more flexible and can sand right angles, they are inefficient, have a small sanding range, and require frequent operator movement to sand different areas, which is time-consuming and labor-intensive. Existing electric sanding devices use a motor to rotate sandpaper, which improves efficiency and saves manpower, but they cannot sand right angles, which still require manual sanding. The limited sanding range of electric sanding devices reduces their practicality. Therefore, this invention designs a wall sanding device for building decoration. Summary of the Invention

[0003] This invention provides a wall grinding device for building decoration, which solves the defects in the prior art.

[0004] This invention is achieved through the following technical solution:

[0005] A wall sanding device for building decoration includes sandpaper, which is attached to a turntable via Velcro. The turntable is divided into three parts: a left side plate, a middle side plate, and a right side plate. The left and right side plates can be folded upwards. The turntable is set inside a dust collection hood, which is equipped with a motor that can drive the turntable to rotate. The dust collection hood is also equipped with a suction pipe. The dust collection hood is characterized by being composed of a left side hood, a middle side hood, and a right side hood. The left and right side hoods are respectively inserted into and fitted with the middle side hood. The left and right side plates are equipped with a first limiting device and a second limiting device. The first limiting device can maintain the turntable in a non-folded state, and the second limiting device can maintain the turntable in a folded state. The middle side plate is fixedly mounted on a rotating shaft, which is mounted on a support plate. The motor is connected to the support plate via a transmission mechanism, which can drive the support plate to rotate or make the support plate reciprocate linearly.

[0006] As described above, a wall polishing device for building decoration includes a first limiting device comprising a first arc-shaped block and a second limiting device comprising a second arc-shaped block. The first arc-shaped block and the second arc-shaped block are fixedly installed on the left and right sides respectively. The first arc-shaped block on the left side and the first arc-shaped block on the right side are centrally symmetrical about the center of the turntable. The second arc-shaped block on the left side and the second arc-shaped block on the right side are centrally symmetrical about the center of the turntable. Arc-shaped grooves are respectively formed on the first and second arc-shaped blocks, and first sliding grooves communicating with the arc-shaped grooves are respectively formed on the first and second arc-shaped blocks. A first rotating ring and a second rotating ring are rotatably installed on the rotating shaft. An arc-shaped rod is fixedly installed on the first rotating ring corresponding to the first arc-shaped block via a first support rod. An arc-shaped rod is also fixedly installed on the second rotating ring corresponding to the second arc-shaped block via a second support rod. The arc-shaped rod on the first support rod engages with the arc-shaped groove on the first arc-shaped block. When the left and right covers are in a folded state, the arc-shaped rod on the second support rod engages with the arc-shaped groove on the second arc-shaped block.

[0007] As described above, in a wall grinding device for building decoration, the first support rod and the second support rod are respectively provided with external threads, and the first support rod and the second support rod are respectively threadedly fitted with nuts. The first arc-shaped block and the second arc-shaped block are respectively provided with circular grooves corresponding to the nuts, and one end of the nut can be tightly abutted against the inner wall of the circular groove.

[0008] As described above, a wall grinding device for building decoration includes a transmission mechanism comprising a clamping plate. Clamping plates are movably mounted on the front and rear sides of a support plate. One end of several connecting rods is hinged to the bottom of each clamping plate, and the other end of each connecting rod is hinged to the support plate. The top of each clamping plate is slidably mounted on an annular plate. A first ring is rotatably mounted on the annular plate. Insert rods are fixedly mounted on the front and rear sides of the first ring. The upper ends of the insert rods pass through pre-drilled holes on a middle side cover and are fixedly mounted on a second ring. The second ring is rotatably mounted on a nut. The nut is threadedly mounted on an externally threaded tube, which is fixedly mounted on the middle side cover. A motor is fixedly mounted on the externally threaded tube. One end of a transmission shaft is fixedly connected to the motor's shaft. The transmission shaft is rotatably mounted in a through hole on the middle side cover. The other end of the transmission shaft passes through the central hole of the annular plate and is rotatably connected to a slider. The slider is slidably mounted on a slide rod, which is fixedly mounted in a second slide groove on the support plate. Slots are provided on the support plate corresponding to the insert rods. A push plate is fixedly mounted on the transmission shaft.

[0009] As described above, in a wall grinding device for building decoration, the rotating shaft is fixedly mounted on a support plate by several spring rods.

[0010] As described above, in a wall grinding device for building decoration, the front and rear sides of the slider are respectively connected to the inner wall of the second slide groove by a first spring, and the first spring is respectively fitted on the slide rod.

[0011] As described above, a wall polishing device for building decoration has dovetail blocks on the right side of the top of the left side cover and the left side of the top of the right side cover. Dovetail grooves are respectively opened on the left and right sides of the top of the middle side cover corresponding to the dovetail blocks. The dovetail blocks and dovetail grooves are inserted and matched. The right end of the left side cover is tightly fitted with the left end of the middle side cover, and the left end of the right side cover is tightly fitted with the right end of the middle side cover. A groove is opened in the dovetail groove, and a locking block is movably installed in the groove. The locking block is connected to the inner wall of the groove through a second spring. A slot is opened on the dovetail block corresponding to the locking block, and the locking block and the slot are inserted and matched.

[0012] As described above, in a wall polishing device for building decoration, a ring of brushes is fixedly installed at the bottom of the dust collection hood, and brushes are also fixedly installed on the inner walls of both sides of the middle side hood.

[0013] As described above, in a wall grinding device for building decoration, several handles are fixedly installed on the nut.

[0014] The advantages of this invention are: It has a simple structure and ingenious design. By folding the sandpaper and changing the transmission mode, it can achieve electric sanding of right-angled walls, eliminating the need for manual sanding, further improving sanding efficiency, saving manpower, and reducing sanding dead angles. It meets practical needs and is suitable for widespread application. When using this invention to sand a flat wall surface, adjust the turntable so that the turntable and sandpaper are in an unfolded state. Then, use the first limiting device to maintain the unfolded state of the turntable and sandpaper. Connect the left and right side covers to the middle side cover to form a dust collection hood. Then, adjust the transmission mechanism to switch to a mode that drives the support plate to rotate. During sanding, start the motor. The motor's rotation, through the transmission mechanism, drives the support plate and rotating shaft to rotate. The rotating shaft drives the turntable and sandpaper to rotate, sanding the wall surface. The dust from sanding enters the dust collection hood and is then sucked out by an external vacuum cleaner through the suction pipe on the middle side cover. When sanding a right angle of the wall... When ready, remove the left and right side covers from the middle side cover, then release the first limiting device from the turntable, and then fold the left and right side plates upwards to fold the turntable and sandpaper. After adjustment, operate the second limiting device to maintain the folded state of the turntable and sandpaper. Then adjust the transmission mechanism to change it to drive the support plate to perform linear reciprocating motion. After adjustment, start the motor. The motor drives the support plate, rotating shaft, turntable, and sandpaper to perform linear reciprocating motion, pressing the right angle of the sandpaper against the wall to sand the wall. If the sandpaper needs to be replaced, the sandpaper is attached to the turntable with Velcro and can be directly peeled off the turntable to replace the new sandpaper. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the turntable in its non-folded state; Figure 3 yes Figure 2 A diagram illustrating the folded state; Figure 4 This is a diagram showing the folded state of the turntable; Figure 5 yes Figure 2 View from direction A; Figure 6 This is a schematic diagram of the transmission mechanism; Figure 7 yes Figure 6 View from direction B; Figure 8 This is a schematic diagram of the ring-shaped plate structure; Figure 9 yes Figure 1 The C-direction view; Figure 10 yes Figure 1 Part I enlarged view.

[0017] Reference numerals: 1. Sandpaper; 2. Velcro; 5. Motor; 6. Shaft; 7. Support plate; 8. Clamping plate; 9. Connecting rod; 10. Ring plate; 11. First ring; 12. Insert rod; 13. Second ring; 14. Nut; 15. External threaded tube; 16. Drive shaft; 17. Slider; 18. Slide rod; 19. Suction pipe; 20. Second support rod; 22. First arc-shaped block; 23. Arc-shaped groove; 24. First sliding groove; 25. Second arc-shaped block; 26. First rotating ring; 27. Second rotating ring; 28. First support rod. 29. Arc rod; 30. Nut; 31. Circular groove; 41. T-shaped slide; 42. T-shaped slider; 45. Second slide; 40. Push plate; 50. Spring rod; 60. First spring; 70. Dovetail block; 71. Dovetail groove; 72. Groove; 73. Locking block; 74. Second spring; 75. Locking slot; 80. Brush; 81. Fixing plate; 90. Handle; 301. Left side plate; 302. Middle side plate; 303. Right side plate; 401. Left side cover; 402. Middle side cover; 403. Right side cover; 111. Slot. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] A wall polishing device for building decoration, such as Figure 1 , 2As shown in figures 3, 4, 5, 6, 7, 8, 9, and 10, the device includes sandpaper 1, which is mounted on a turntable via Velcro 2. Velcro 2 consists of two parts: a male side with rounded bristles and a female side with barbs. The male side can be removed from the female side. Sandpaper 1 is fixedly mounted on the male side, and the turntable is fixedly mounted on the female side. The turntable is divided into three parts: a left side plate 301, a middle side plate 302, and a right side plate 303. The left side plate 301 and the right side plate 303 can be folded upwards. The turntable is housed inside a dust collection hood, which is equipped with a motor 5 that drives the turntable to rotate. A suction pipe 19 is also provided on the dust collection hood, which can be connected to an external vacuum cleaner. The invention is characterized by the following: the dust collection hood is composed of a left side cover 401, a middle side cover 402, and a right side cover 403. The left side cover 401 and the right side cover 403 are respectively inserted into the middle side cover 402. The left side plate 301 and the right side plate 303 are provided with a first limiting device and a second limiting device. The first limiting device can maintain the turntable in a non-folded state, and the second limiting device can maintain the turntable in a folded state. The middle side plate 302 is fixedly installed on the rotating shaft 6, and the rotating shaft 6 is installed on the support plate 7. The motor 5 is connected to the support plate 7 through a transmission mechanism. The motor 5 can drive the support plate 7 to rotate or make the support plate 7 reciprocate linearly. This invention has a simple structure and ingenious design. By folding the sandpaper and changing the transmission mode, electric sanding of right-angled walls can be achieved, eliminating the need for manual sanding, further improving sanding efficiency, saving manpower, and reducing sanding dead angles. It can meet practical needs and is suitable for promotion. When using this invention, if the flat surface of the wall is to be sanded, the turntable is adjusted so that the turntable and sandpaper 1 are in an unfolded state. Then, the first limiting device is used to maintain the unfolded state of the turntable and sandpaper 1. The left side cover 401 and the right side cover 403 are respectively inserted and matched with the middle side cover 402 to form a dust collection hood. Then, the transmission mechanism is adjusted to switch to a mode that drives the support plate 7 to rotate. During sanding, the motor 5 is started. The rotation of the motor 5 drives the support plate 7 and the rotating shaft 6 to rotate through the transmission mechanism. The rotation of the rotating shaft 6 drives the turntable and sandpaper 1 to rotate and sand the wall surface. During sanding, the dust that is sanded enters the dust collection hood and is then sucked out by the external vacuum cleaner through the suction pipe 19 on the middle side cover 402. When it is necessary to sand the right angle of the wall, Remove the left side cover 401 and right side cover 403 from the middle side cover 402, then release the first limiting device from the turntable, and then fold the left side plate 301 and right side plate 303 upwards to put the turntable and sandpaper 1 in a folded state. After adjustment, operate the second limiting device to maintain the folded state of the turntable and sandpaper 1. Then adjust the transmission mechanism to change it to drive the support plate 7 to perform linear reciprocating motion. After adjustment, start the motor 5. The motor 5 drives the support plate 7, the rotating shaft 6, the turntable, and the sandpaper 1 to perform linear reciprocating motion, so that the sandpaper 1 is attached to the right angle of the wall to sand the wall. If the sandpaper 1 needs to be replaced, the sandpaper 1 is installed on the turntable through the Velcro 2, and the sandpaper 1 can be directly peeled off the turntable to replace the new sandpaper 1.

[0020] Specifically, as shown in the figure, in this embodiment, the first limiting device includes a first arc-shaped block 22, and the second limiting device includes a second arc-shaped block 25. The first arc-shaped block 22 and the second arc-shaped block 25 are fixedly installed on the left side plate 301 and the right side plate 303, respectively. The first arc-shaped block 22 on the left side plate 301 and the first arc-shaped block 22 on the right side plate 303 are centrally symmetrical about the center of the turntable. The second arc-shaped block 25 on the left side plate 301 and the second arc-shaped block 25 on the right side plate 303 are centrally symmetrical about the center of the turntable. Arc-shaped grooves 23 are respectively formed on the first arc-shaped block 22 and the second arc-shaped block 25, with one end closed and the other end open to the outside. Arc-shaped grooves 23 are respectively formed on the first arc-shaped block 22 and the second arc-shaped block 25, respectively. A first rotating ring 26 and a second rotating ring 27 are rotatably mounted on a rotating shaft 6 via a first sliding groove 24. The first rotating ring 26 and the second rotating ring 27 are rotatably mounted on the rotating shaft 6 via bearings. An arc-shaped rod 29 is fixedly mounted on the first rotating ring 26 corresponding to the first arc-shaped block 22 via a first support rod 28. An arc-shaped rod 29 is also fixedly mounted on the second rotating ring 27 corresponding to the second arc-shaped block 25 via a second support rod 20. The first support rod 28 can slide within the corresponding first sliding groove 24. The arc-shaped rod 29 on the first support rod 28 is inserted into the arc-shaped groove 23 on the first arc-shaped block 22. When the left side cover 401 and the right side cover 403 are in a folded state, the arc-shaped rod 29 on the second support rod 20 is inserted into the arc-shaped groove 23 on the second arc-shaped block 25.When the turntable is in its open state, rotating the first rotating ring 26 drives the first support rod 28 and the arc-shaped rod 29 on the first support rod 28 to rotate, causing the arc-shaped rod 29 on the first support rod 28 to rotate into the arc-shaped groove 23 corresponding to the first arc-shaped block 22, so that the arc-shaped rod 29 and the arc-shaped groove 23 are engaged. At the same time as the arc-shaped rod 29 rotates into the arc-shaped groove 23, the first support rod 28 slides in the corresponding first sliding groove 24. The engagement of the arc-shaped rod 29 on the first support rod 28 with the arc-shaped groove 23 on the first arc-shaped block 22 prevents the left side panel 301 and the right side panel 402 from folding upwards, thus keeping the turntable in its open state, facilitating the rotation of the turntable for rotating and sanding the wall surface; rotating the first rotating ring 26 adjusts the position of the first support rod 28 so that it does not interfere with the folded left side panel 301. Interference occurs between the left and right side plates 303 and the turntable. Then, the left and right side plates 301 and 303 are rotated upwards to fold the turntable. The second rotating ring 27 is then rotated to drive the second support rod 20 and the arc-shaped rod 29 on the second support rod 20 to rotate. This causes the arc-shaped rod 29 on the second support rod 20 to rotate into the arc-shaped groove 23 corresponding to the second arc-shaped block 25, allowing the arc-shaped rod 29 to engage with the arc-shaped groove 23. As the arc-shaped rod 29 rotates into the arc-shaped groove 23, the second support rod 20 slides in the corresponding first sliding groove 24. The engagement of the arc-shaped rod 29 on the second support rod 20 with the arc-shaped groove 23 on the second arc-shaped block 25 prevents the left and right side plates 301 and 303 from rotating outwards, thus keeping the turntable in a folded state. This facilitates the turntable's reciprocating linear motion for sanding the wall surface.

[0021] Specifically, as shown in the figure, in this embodiment, the first support rod 28 and the second support rod 20 are respectively provided with external threads, and the first support rod 28 and the second support rod 20 are respectively threadedly fitted with nut 30. The first arc block 22 and the second arc block 25 are respectively provided with circular grooves 31 corresponding to the nut 30. The circular grooves 31 are connected to the corresponding first sliding grooves 24, and one end of the nut 30 can be tightly abutted against the inner wall of the circular groove 31. When the arc-shaped rod 29 engages with the arc-shaped groove 23, the screw nut 30 is screwed into the circular groove 31 and tightly abuts against the inner wall of the circular groove 31. The screw nut 30 clamps the first arc-shaped block 22 and is restricted within the circular groove 31, preventing the first support rod 28 or the second support rod 20 from sliding in the corresponding first slide groove 24. Consequently, the arc-shaped rod 29 cannot slide out of the arc-shaped groove 23, preventing the arc-shaped rod 29 from sliding out of the arc-shaped groove 23 during rotation or reciprocating linear motion of the turntable, thus changing the state of the turntable and avoiding affecting its normal operation.

[0022] Furthermore, as shown in the figure, the transmission mechanism described in this embodiment includes a clamping plate 8. Clamping plates 8 are movably mounted on the front and rear sides of the support plate 7. Several connecting rods 9 are hinged to one end of their respective bottoms. In this embodiment, each clamping plate 8 has two connecting rods 9, and the other end of each connecting rod 9 is hinged to the support plate 7. The tops of the clamping plates 8 are slidably mounted on an annular plate 10. A T-shaped groove 41 is formed on the top of the clamping plate 8. A T-shaped slider 42 is fixedly mounted on the bottom of the annular plate 10 corresponding to the T-shaped groove 41. The T-shaped slider 42 and the T-shaped groove 41 are connected... 1. A sliding connection is established. A first ring 11 is rotatably mounted on the annular plate 10. The inner circumference of the first ring 11 is rotatably mounted on the outer circumference of the annular plate 10 via bearings. The first ring 11 is coaxial with the annular plate 10. Insert rods 12 are fixedly mounted on the front and rear sides of the first ring 11, respectively. The upper ends of the insert rods 12 pass through the reserved holes on the middle side cover 402 and are fixedly mounted on the second ring 13. The second ring 13 is rotatably mounted on the nut 14. The inner circumference of the second ring 13 is rotatably mounted on the outer circumference of the nut 14 via bearings. The nut 14 is threadedly mounted on the outer circumference of the nut 14. The threaded tube 15 is fixed to the middle side cover 402. The nut 14 is coaxial with the threaded tube 15. The motor 5 is fixedly installed on the threaded tube 15. One end of the drive shaft 16 is fixedly connected to the rotating shaft of the motor 5. The drive shaft 16 is rotatably installed in the through hole on the middle side cover 402. The other end of the drive shaft 16 passes through the central hole of the annular plate 10 and is rotatably connected to the slider 17. The slider 17 is cylindrical. The upper end of the slider 17 is rotatably connected to the lower end of the drive shaft 16 through a bearing. The slider 17, the annular plate 10, and the drive shaft 16 are all connected. The through hole on the middle side cover 402, the rotating shaft of the motor 5, and the external threaded tube 15 are coaxial. The slider 17 is slidably mounted on the slide rod 18. The slider 17 can only slide back and forth along the slide rod 18. The slide rod 18 is fixedly mounted in the second slide groove 45 on the support plate 7. The support plate 7 has slots 111 respectively corresponding to the insertion rod 12. The insertion rod 12 can slide back and forth in the slots 111. The push plate 40 is fixedly mounted on the transmission shaft 16. One end of the push plate 40 is fixedly mounted on the transmission shaft 16, and the other end of the push plate 40 can slide and contact with the clamps 8 on both sides.When the motor 5 needs to drive the support plate 7 to rotate, the nut 14 is rotated, causing the nut 14 to drive the second ring 13 and the insertion rod 12 to move upward along the external threaded tube 15. The insertion rod 12 moves upward and moves out of the slot 111, driving the first ring 11, the annular plate 10, and the clamping plate 8 to move upward. At the same time, the clamping plate 8 is pulled inward by the connecting rod 9. The clamping plates 8 on both sides slide towards each other until they clamp the push plate 40. The motor 5 is started, and the rotating shaft of the motor 5 drives the transmission shaft 16 and the push plate 40 to rotate. Since the clamping plates 8 on both sides clamp the push plate 40, the push plate 40 rotates to give the clamping plate 40 a gripping force. A rotating thrust on plate 8 causes clamping plate 8 to rotate, which in turn drives support plate 7 and slider 17 to rotate along transmission shaft 16, realizing the rotation of support plate 7 and driving turntable and sandpaper 1 to rotate and sand the wall surface; when motor 5 needs to drive support plate 7 to reciprocate, rotating nut 14 causes nut 14 to drive second ring 13 and insert rod 12 to move downward along external thread tube 15, insert rod 12 downward and insert into slot 111, at the same time driving first ring 11, ring plate 10 and clamping plate 8 to move downward, clamping plate 8 is pushed outward by connecting rod 9 while moving downward, clamping on both sides The sliding distance of plate 8 increases, and then motor 5 is started. The rotating shaft of motor 5 drives the transmission shaft 16 and push plate 40 to rotate. When push plate 40 contacts the front clamping plate 8, since the insertion rod 12 is located in the slot 111 and restricts the rotation of support plate 7 and clamping plate 8, push plate 40 gives clamping plate 8 a forward thrust, causing clamping plate 8 to slide forward on the annular plate 10 until push plate 40 separates from clamping plate 8. Clamping plate 8 slides forward, driving support plate 7 to move forward. At the same time, slot 111 moves forward relative to insertion rod 12, slider 17 slides backward relative to slider 18, and transmission... Shaft 16 rotates on slider 17. When push plate 40 rotates and contacts clamping plate 8 on the rear side, push plate 40 gives clamping plate 8 a backward push force, causing clamping plate 8 to slide backward on ring plate 10 until push plate 40 separates from clamping plate 8. Clamping plate 8 slides backward, driving support plate 7 to move backward. At the same time, slot 111 moves backward relative to insert rod 12, slider 17 slides forward relative to slide rod 18, and drive shaft 16 rotates on slider 17. This reciprocating motion of support plate 7 back and forth in a linear direction is achieved, so as to drive sandpaper 1 on turntable to sand the wall surface in a linear direction.

[0023] Furthermore, as shown in the figure, in this embodiment, the rotating shaft 6 is fixedly mounted on the support plate 7 by several spring rods 50. In this embodiment, there are two spring rods 50. The fixed ends of the spring rods 50 are fixedly mounted on the bottom of the support plate 7, and the movable ends of the spring rods 50 are fixedly connected to the outer periphery of the rotating shaft 6 through connecting rods. To facilitate the operation of the first limiting device used to maintain the non-folded state of the turntable and the second limiting device used to maintain the folded state of the turntable, the turntable can be pulled down first to stretch the spring rods 50, increasing the space between the turntable, the support plate 7, and the dust hood, thus facilitating operation.

[0024] Furthermore, as shown in the figure, in this embodiment, the front and rear sides of the slider 17 are respectively connected to the inner wall of the second slide groove 45 by the first spring 60. The front end of the first spring 60 is fixedly connected to the inner wall of the front side of the second slide groove 45, the rear end of the first spring 60 is fixedly connected to the front side of the slider 17, the rear end of the first spring 60 is fixedly connected to the inner wall of the rear side of the second slide groove 45, and the front end of the first spring 60 is fixedly connected to the rear side of the slider 17. The first spring 60 is respectively fitted on the slide rod 18. When motor 5 drives support plate 7 to reciprocate linearly, push plate 40 pushes clamping plate 8 and support plate 7 to move to the corresponding side. The first spring 60 on the corresponding side is compressed, and the first spring 60 on the other side is stretched. When push plate 40 separates from clamping plate 8, the support plate 7 and clamping plate 8 automatically reset under the action of the elastic force of the first spring 60. This avoids the situation where clamping plate 8 jams push plate 40 and prevents it from rotating normally after push plate 40 pushes clamping plate 8 to the other side. This ensures that push plate 40 can cyclically push clamping plates 8 on both sides to achieve linear reciprocating motion of support plate 7. Rotating nut 14 drives second ring 13 to rotate, so that insertion rod 12 is not in slot 111. Control motor 5 to rotate, driving transmission shaft 16 and push plate 40 to rotate, so that push plate 40 generates a certain pushing force on clamping plate 8, pushing clamping plate 8 and support plate 7 a corresponding distance. When support plate 7 rotates, the center changes, and slider 17 slides along slider rod 18. The first spring 60 on one side of slider 7 is compressed, and the first spring 60 on the other side of slider 17 is stretched. When the motor 5 drives the transmission shaft 16 and push plate 40 to rotate, the pushing force to clamp plate 8 can no longer compress or stretch the first spring 60, making it impossible for push plate 40 to disengage from clamp plate 8. When the motor 5 rotates, it drives the transmission shaft 16, push plate 40, and clamp plate 8 to rotate, thereby causing support 7 to rotate eccentrically along the changed rotation center. The eccentric rotation of support plate 7 drives the turntable and sandpaper 1 to rotate eccentrically, and the grinding area of ​​sandpaper 1 when it rotates is further expanded, thereby increasing the grinding efficiency to a certain extent. The position of annular plate 10 is adjusted by controlling the up and down movement of insert rod 12 through nut 14. The up and down movement of annular plate 10 drives clamp plate 8 to move to different positions. The length of compression and stretching of first spring 60 required for push plate 40 to disengage from clamp plate 8 changes, thereby causing the center of rotation of support plate 7 to shift by different distances, so that sandpaper 1 has different grinding areas, increasing the practicality of the device.

[0025] Furthermore, as shown in the figure, in this embodiment, dovetail blocks 70 are respectively provided on the right side of the top of the left side cover 401 and the left side of the top of the right side cover 403. Dovetail grooves 71 are respectively opened on the left and right sides of the top of the middle side cover 402 corresponding to the dovetail blocks 70. The dovetail blocks 70 and the dovetail grooves 71 are inserted and matched. The right end of the left side cover 401 is tightly fitted with the left end of the middle side cover 402, and the left end of the right side cover 403 is tightly fitted with the right end of the middle side cover 402. A groove 72 is opened in the dovetail groove 71, and a locking block 73 is movably provided in the groove 72. The outer end of the locking block 73 is hemispherical. The locking block 73 is connected to the inner wall of the groove 72 through the second spring 74. A slot 75 is opened on the dovetail block 70 corresponding to the locking block 73. The locking block 73 and the slot 75 are inserted and matched. The dovetail block 70 and dovetail groove 71 connect and disconnect the left side cover 401, right side cover 403, and middle side cover 402, facilitating structural changes of the dust cover according to different polishing methods. This allows for dust collection during rotary polishing or linear reciprocating polishing, increasing the device's practicality. When the left side cover 401 and right side cover 403 are installed on the middle side cover 402, the corresponding dovetail block 70 slides within the dovetail groove 71. When the dovetail block 70 contacts the locking block 73, it presses the locking block 73 into the groove 72. The second spring 7... When the dovetail block 70 is compressed, and the slot 75 on the dovetail block 70 moves to the position of the locking block 73, the locking block 73 is locked into the slot 75 under the action of the second spring 74, thereby restricting the sliding of the dovetail block 70 and preventing the left side cover 401 and the right side cover 403 from detaching from the middle side cover 402, thus ensuring that the dust cover can work normally; when it is necessary to remove the left side cover 401 and the right side cover 403, pull the left side cover 401 and the right side cover 403 with force to squeeze the locking block 73 into the groove 72, and then the dovetail block 70 can be pulled out to remove the left side cover 401 and the right side cover 403.

[0026] Furthermore, as shown in the figure, a ring of brushes 80 is fixedly installed at the bottom of the dust collection hood in this embodiment. The brushes 80 are fixedly installed at the bottom of the left side cover 401, the middle side cover 402, and the right side cover 403. The brushes 80 at the bottom of the left side cover 401, the middle side cover 402, and the right side cover 403 form a complete circle. Brushes 80 are also fixedly installed on the inner walls on both sides of the middle side cover 402. The brushes 80 on both sides of the middle side cover 402 are fixedly installed on the fixing plate 81, and the fixing plate 81 is fixedly installed on the middle side cover 402. The brushes 80 can sweep away the dust left by the sandpaper 1 when sanding the wall surface, and the dust collection hood then discharges the dust from the suction pipe 19. At the same time, the brushes 80 can increase the sealing between the wall surface and the dust collection hood, preventing dust from escaping from the dust collection hood.

[0027] Furthermore, as shown in the figure, several handles 90 are fixedly installed on the nut 14 in this embodiment. Turning the nut 14 through the handles 90 makes it more convenient and less strenuous.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wall sanding device for building decoration, comprising sandpaper (1), the sandpaper (1) being mounted on a turntable via Velcro (2), the turntable being divided into three parts: a left side plate (301), a middle side plate (302), and a right side plate (303), the left side plate (301) and the right side plate (303) being foldable upwards, the turntable being set inside a dust collection hood, the dust collection hood being equipped with a motor (5) capable of driving the turntable to rotate, and the dust collection hood being equipped with a suction pipe (19), characterized in that: The dust collection hood consists of a left side cover (401), a middle side cover (402), and a right side cover (403). The left side cover (401) and the right side cover (403) are respectively inserted into the middle side cover (402). The left side plate (301) and the right side plate (303) are provided with a first limiting device and a second limiting device. The first limiting device can maintain the turntable in a non-folded state, and the second limiting device can maintain the turntable in a folded state. The middle side plate (302) is fixedly installed on the rotating shaft (6), and the rotating shaft (6) is installed on the support plate (7). The motor (5) is connected to the support plate (7) through a transmission mechanism. 7) Transmission connection: The motor (5) can drive the support plate (7) to rotate or make the support plate (7) reciprocate linearly through the transmission mechanism; the transmission mechanism includes a clamping plate (8), and the support plate (7) is movably provided with clamping plates (8) on the front and rear sides respectively. The bottom of the clamping plate (8) is hinged to one end of several connecting rods (9), and the other end of the connecting rods (9) is hinged to the support plate (7). The top of the clamping plate (8) is slidably installed on the annular plate (10), and the first ring (11) is rotatably installed on the annular plate (10). The front and rear sides of the first ring (11) are respectively fixed. A fixed mounting rod (12) is installed, with its upper end passing through a pre-drilled hole on the middle side cover (402) and fixedly mounted on the second ring (13). The second ring (13) is rotatably mounted on a nut (14), which is threadedly mounted on an external threaded tube (15). The external threaded tube (15) is fixed on the middle side cover (402), and the motor (5) is fixedly mounted on the external threaded tube (15). One end of a transmission shaft (16) is fixedly connected to the shaft of the motor (5), and the transmission shaft (16) is rotatably mounted in a through hole on the middle side cover (402). The other end of the shaft (16) passes through the central hole of the annular plate (10) and is rotatably connected to the slider (17). The slider (17) is slidably mounted on the slide rod (18). The slide rod (18) is fixedly mounted in the second slide groove (45) on the support plate (7). The support plate (7) has slots (111) respectively corresponding to the insert rod (12). The push plate (40) is fixedly mounted on the drive shaft (16). The front and rear sides of the slider (17) are respectively connected to the inner wall of the second slide groove (45) through the first spring (60). The first spring (60) is respectively fitted on the slide rod (18).

2. The wall grinding device for building decoration and renovation according to claim 1, characterized in that: The first limiting device includes a first arc-shaped block (22), and the second limiting device includes a second arc-shaped block (25). The first arc-shaped block (22) and the second arc-shaped block (25) are fixedly installed on the left side plate (301) and the right side plate (303), respectively. The first arc-shaped block (22) on the left side plate (301) and the first arc-shaped block (22) on the right side plate (303) are centrally symmetrical about the center of the turntable. The second arc-shaped block (25) on the left side plate (301) and the second arc-shaped block (25) on the right side plate (303) are centrally symmetrical about the center of the turntable. Arc-shaped grooves (23) are respectively opened on the first arc-shaped block (22) and the second arc-shaped block (25). The first sliding groove (24) is connected to the groove (23). The first rotating ring (26) and the second rotating ring (27) are rotatably installed on the rotating shaft (6). The first rotating ring (26) is fixedly installed with the arc rod (29) corresponding to the first arc block (22) through the first support rod (28). The second rotating ring (27) is also fixedly installed with the arc rod (29) corresponding to the second arc block (25) through the second support rod (20). The arc rod (29) on the first support rod (28) is inserted into the arc groove (23) on the first arc block (22). When the left cover (401) and the right cover (403) are in the folded state, the arc rod (29) on the second support rod (20) is inserted into the arc groove (23) on the second arc block (25).

3. The wall grinding device for building decoration and renovation according to claim 2, characterized in that: The first support rod (28) and the second support rod (20) are respectively provided with external threads. The first support rod (28) and the second support rod (20) are respectively threaded to install nut (30). The first arc block (22) and the second arc block (25) are respectively provided with circular grooves (31) corresponding to the nut (30). One end of the nut (30) can be tightly abutted against the inner wall of the circular groove (31).

4. The wall grinding device for building decoration and renovation according to claim 1, characterized in that: The rotating shaft (6) is fixedly mounted on the support plate (7) by several spring rods (50).

5. The wall grinding device for building decoration and renovation according to claim 1, characterized in that: The left side cover (401) and the right side cover (403) are respectively provided with dovetail blocks (70). The left and right sides of the top of the middle side cover (402) are respectively provided with dovetail grooves (71) corresponding to the dovetail blocks (70). The dovetail blocks (70) and the dovetail grooves (71) are inserted and matched. The right end of the left side cover (401) is closely fitted with the left end of the middle side cover (402). The left end of the right side cover (403) is closely fitted with the right end of the middle side cover (402). The groove (72) is provided in the dovetail groove (71). The locking block (73) is movably provided in the groove (72). The locking block (73) is connected to the inner wall of the groove (72) through the second spring (74). The locking slot (75) is provided on the dovetail block (70) corresponding to the locking block (73). The locking block (73) and the locking slot (75) are inserted and matched.

6. The wall grinding device for building decoration and renovation according to claim 1, characterized in that: A ring of brushes (80) is fixedly installed at the bottom of the dust cover, and brushes (80) are also fixedly installed on the inner walls of both sides of the middle side cover (402).

7. The wall grinding device for building decoration and renovation according to claim 1, characterized in that: Several handles (90) are fixedly installed on the nut (14).

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