A household appliance coating sander

Abstract

The application discloses a household appliance coating sanding machine, which comprises a bottom plate and a device body, wherein the device body comprises a stand, a mounting bracket, a power shell, a workbench and a positioning threaded rod, and the stand is fixedly arranged on the top of the bottom plate. The household appliance coating sanding machine has the advantages that when a motor is started, a driving wheel drives a driven wheel to rotate, the driven wheel drives a driving crank to make a coupling rod reciprocate, a triangular floating block drives a polishing disc to move along a non-repeated complex plane track under the constraint of a first rocker and a second rocker, the rotation track of the polishing disc is changed into a regular periodic type by locking the second rocker through a locking assembly, consistent decorative textures can be processed, one machine is used for two purposes, the height of the workbench is adjusted by rotating the positioning threaded rod, the angle of the power shell is adjusted by rotating a lifting arm, different sizes of workpieces can be adapted, the whole machine is driven by mechanical connecting rods, complex components are not needed, the machine is stable, durable and low in cost, and the polishing applicability and economy are improved.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, specifically to a household appliance coating sander. Background Technology

[0002] In the manufacturing process of household appliances, the surface coating quality of the outer casing is a crucial factor determining the final appearance of the product. To achieve a uniform, smooth matte or frosted texture, or to improve interlayer adhesion in multi-layer spraying processes, precise sanding is required on the cured paint layer. Traditional surface sanding equipment typically uses simple rotation or eccentric vibration, resulting in a single, highly periodic trajectory that easily leaves regular swirling scratches on the workpiece surface, affecting the product's aesthetics. Furthermore, for applications requiring the creation of special decorative textures, traditional sanding machines are limited by their single function and cannot achieve this.

[0003] To improve the polishing effect, the industry has also conducted related explorations. For example, Chinese utility model patent with publication number CN211678016U discloses a device also named "Household Appliance Coating Sanding Machine". However, after in-depth analysis of its structure and working principle, it can be seen that the device is essentially a horizontal sanding mill. Although this solution has certain improvements in the field of wet grinding, its structure and function cannot be applied to the process of polishing the surface of already formed and cured household appliance shell coatings. Therefore, it cannot fundamentally solve the technical problem of vortex patterns on the workpiece surface due to the single polishing motion trajectory, nor can it meet the needs of manufacturing specific surface textures.

[0004] Therefore, we need to propose a coating sander for household appliances. Summary of the Invention

[0005] The purpose of this invention is to provide a household appliance coating sander that has the advantages of achieving high-quality, scratch-free fine sanding, being able to switch with one button to generate decorative aesthetic textures, and having a simple and reliable overall structure, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a household appliance coating sander, comprising a base plate and a device body, wherein the device body comprises a column, a mounting bracket, a power housing, a worktable, and a positioning threaded rod, wherein the column is fixedly mounted on the top of the base plate, the mounting bracket is fixedly mounted on the top of the column, the power housing is rotatably mounted on the mounting bracket, the worktable is sleeved on the outer periphery of the column, and a transmission component is provided on the top of the power housing; The power housing is equipped with a locking component; A drive assembly is fixedly installed on the top of the base plate; An adjustment assembly is provided on the outer wall of the column. The adjustment assembly includes a support lug and a lifting arm. The support lug is provided on the outer wall of the column, and the lifting arm is rotatably provided on the outer wall of the support lug. The lifting arm is fixedly provided on the bottom of the power housing.

[0007] Preferably, the transmission assembly includes a driven wheel, a driving crank, a coupling rod, a triangular floating block, a first rocker arm, and a second rocker arm. The driven wheel is mounted on the top of the power housing. The left and right ends of the coupling rod are rotatably connected to the driving crank and the first rocker arm, respectively. The driving crank is located at the bottom of the driven wheel. Holes are provided at all three ends of the triangular floating block. The triangular floating block is rotatably located in the middle of the coupling rod through the first end.

[0008] Preferably, the locking assembly includes a control lever, a connecting rod, a positioning clamp, a locking pin, a connecting ring, a compression spring, and a guide sleeve. The guide sleeve is disposed on the inner wall of the power housing. One end of the compression spring is disposed on the inner wall of the power housing, and the other end of the compression spring is disposed on the outer wall of the connecting ring. The connecting ring is disposed on the outer periphery of the locking pin. The outer wall of the connecting ring has symmetrically formed ball grooves. The compression spring is sleeved on the outer periphery of the locking pin. The locking pin, the connecting ring, and the compression spring are all disposed inside the guide sleeve. The outer wall of the locking pin has symmetrically formed grooves. The positioning clamp is disposed on the outer wall of the locking pin through the grooves. The control lever is rotatably disposed on the outer wall of the power housing. One end of the connecting rod is rotatably disposed on the output end of the control lever, and the other end of the connecting rod is fixedly disposed on the outer wall of the positioning clamp.

[0009] Preferably, the drive assembly includes a mounting plate, a slider, a motor, and a drive wheel. The mounting plate is disposed on the top of the base plate and has a sliding groove. The slider is slidably disposed on the mounting plate through the sliding groove. The motor is disposed on the top of the slider. The drive wheel is mounted on the motor drive end. The central axes of the drive wheel and the driven wheel are normally located on the same horizontal plane, and the grooves of both the drive wheel and the driven wheel are provided with anti-detachment guards.

[0010] Preferably, a second rocker arm is rotatably provided at the bottom of the second end of the triangular floating block, and both the first rocker arm and the second rocker arm are rotatably provided at the bottom of the inner wall of the power housing, with a circular hole provided on the second rocker arm.

[0011] Preferably, the column is provided with a plurality of evenly distributed threaded holes, and the worktable is sleeved on the outer wall of the column by a positioning threaded rod.

[0012] Preferably, the third end of the triangular floating block is fixedly connected to an actuator rod, and a grinding disc is provided at the bottom of the actuator rod.

[0013] Preferably, two balls are symmetrically installed on the inner wall of the guide sleeve, and the two balls correspond one-to-one with the ball grooves on the outer wall of the connecting ring.

[0014] Preferably, the mounting plate has multiple evenly distributed positioning holes, and the top of the slider is slidably provided with two positioning pins.

[0015] Preferably, the support ear is located above the workbench and below the mounting bracket.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses an active crank to drive a coupling rod, which in turn drives a triangular floating block as the core actuator. Simultaneously, a first rocker arm and a second rocker arm constrain and guide the movement of this floating block. This unique multi-link linkage design allows the actuator fixed to the triangular floating block to generate a complex, wide-range, non-linear planar motion trajectory. This trajectory produces almost no repeating paths, perfectly simulating the manual polishing movements of a skilled craftsman. It ensures that the polishing disc glides across the workpiece surface from multiple angles, fundamentally avoiding the swirl marks or streaks produced by the single, regular motion of traditional polishing machines. The resulting coating surface is extremely smooth, uniform, and delicate.

[0017] 2. This invention selectively fixes the second rocker arm using a locking component, switching the core function of the device from scratch-free polishing to texture generation. The locked mechanism produces a regular, precisely predictable periodic motion trajectory. This trajectory can be used to directly process highly consistent decorative aesthetic textures on the painted surfaces of household appliances. This function allows a single device to perform two completely different surface treatment processes.

[0018] 3. This invention utilizes a mechanical linkage mechanism, eliminating the need for expensive and complex sensors or computer programming. This design not only boasts a robust structure and reliable operation, enabling long-term stable functioning in industrial dust environments, but also significantly reduces manufacturing costs and maintenance complexity. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the driven wheel of the present invention; Figure 3 This is a schematic diagram of the coupling rod of the present invention; Figure 4 This is a schematic diagram of the positioning clamp of the present invention; Figure 5 This is a cross-sectional view of the guide sleeve of the present invention; Figure 6 This is a schematic diagram of the positioning pin of the present invention; Figure 7 This is a schematic diagram of the threaded hole structure of the present invention; Figure 8 This is a schematic diagram of the power housing of the present invention.

[0020] In the diagram: 1. Base plate; 2. Column; 3. Mounting bracket; 4. Power housing; 5. Driven wheel; 6. Drive crank; 7. Coupling rod; 8. Triangular floating block; 9. First rocker arm; 10. Second rocker arm; 11. Actuating rod; 12. Control lever; 13. Connecting rod; 14. Positioning clamp; 15. Locking pin; 16. Connecting ring; 17. Compression spring; 18. Guide sleeve; 19. Mounting plate; 20. Slider; 21. Positioning pin; 22. Positioning hole; 23. Support lug; 24. Lifting arm; 25. Worktable; 26. Positioning threaded rod; 27. Threaded hole; 28. Motor; 29. ​​Drive wheel; 30. Groove; 31. Slide groove; 32. Ball bearing; 33. Grinding disc; 34. Round hole. Detailed Implementation

[0021] 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, and 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.

[0022] Please see Figure 1-8 This invention provides a technical solution: a household appliance paint sander, comprising a base plate 1 and a device body. The device body includes a column 2, a mounting bracket 3, a power housing 4, a worktable 25, and a positioning threaded rod 26. The column 2 is fixedly mounted on the top of the base plate 1, the mounting bracket 3 is fixedly mounted on the top of the column 2, the power housing 4 is rotatably mounted inside the mounting bracket 3, the worktable 25 is sleeved on the outer periphery of the column 2, and a transmission assembly is provided on the top of the power housing 4. The column 2 has multiple evenly distributed threaded holes 27, and the worktable 25 is sleeved on the outer wall of the column 2 via the positioning threaded rod 26. The transmission assembly includes a driven wheel 5, a driving crank 6, a coupling rod 7, and a triangular floating block. 8. A first rocker arm 9 and a second rocker arm 10 are attached. The driven wheel 5 is mounted on the top of the power housing 4. The left and right ends of the coupling rod 7 are rotatably connected to the driving crank 6 and the first rocker arm 9, respectively. The driving crank 6 is located at the bottom of the driven wheel 5. Holes are provided at all three ends of the triangular floating block 8. The triangular floating block 8 is rotatably located in the middle of the coupling rod 7 through the first end. The second rocker arm 10 is rotatably located at the bottom of the second end of the triangular floating block 8. Both the first rocker arm 9 and the second rocker arm 10 are rotatably located at the bottom of the inner wall of the power housing 4. A round hole 34 is provided on the second rocker arm 10. An actuating rod 11 is fixedly connected to the third end of the triangular floating block 8. A grinding disc 33 is provided at the bottom of the actuating rod 11.

[0023] The first step is height adjustment. The operator first holds the hexagonal handle of the positioning threaded rod 26 and rotates the threaded rod counterclockwise, gradually disengaging the inner end of the threaded rod from the threaded hole 27 on the outer wall of the column 2 until it is completely disengaged. Then, the operator holds the edge of the worktable 25 with both hands and slowly slides the worktable 25 up and down according to the thickness of the workpiece to be ground, ensuring that the grinding disc 33 can effectively contact the workpiece surface without damaging the workpiece during grinding. The second step is fixing the position. After the worktable 25 has slid to the target height, keep the worktable 25 in place and rotate the hexagonal handle of the positioning threaded rod 26 clockwise, so that the inner end of the positioning threaded rod 26 screws into the corresponding threaded hole 27 on the column 2, until the handle feels obvious resistance when rotating, thus locking the worktable 25 in the current position. Through the self-locking property and clamping force of the threaded connection, the worktable 25 is firmly fixed at the current height, preventing the worktable 25 from sliding up and down or shaking during grinding, ensuring the relative position of the workpiece and the grinding disc 33 is stable and does not affect the grinding accuracy.

[0024] First, driven wheel 5 begins to rotate under the meshing drive of the transmission belt. Since the driving crank 6 is fixed at an eccentric position on driven wheel 5, the rotation of driven wheel 5 directly drives driving crank 6 to perform circular motion. The free end of driving crank 6 forms a circular trajectory with the center of driven wheel 5 as the origin and the length of driving crank 6 as the radius. Next, the circular motion of the free end of driving crank 6 is transmitted to the left end of coupling rod 7 through the shaft, causing coupling rod 7 to reciprocate in the horizontal direction: when driving crank 6 rotates to the side closer to coupling rod 7, it pushes coupling rod 7 to move to the right; when driving crank 6 rotates to the side farther from coupling rod 7, it pulls coupling rod 7 to move to the left, forming a reciprocating motion. Subsequently, the reciprocating motion of the coupling rod 7 drives the triangular floating block 8 to move synchronously via the central rotating shaft. Simultaneously, the first rocker arm 9 and the second rocker arm 10 exert bidirectional constraints on the movement of the triangular floating block 8: when the coupling rod 7 pushes to the right, the triangular floating block 8, constrained by the first rocker arm 9, cannot deviate excessively to the right and can only translate to the left. At the same time, the second rocker arm 10 experiences a slight pull due to the displacement of the triangular floating block 8, causing it to rotate slightly clockwise. When the coupling rod 7 pulls to the left, the triangular floating block 8, supported by the second rocker arm 10, cannot deviate excessively to the left and can only translate to the right. Simultaneously, the first rocker arm 9 restricts the displacement of the triangular floating block 8, causing it to rotate slightly counterclockwise. Finally, the trajectory is transmitted. The combined "translation + rotation" motion of the triangular floating block 8 is directly transmitted to the grinding disc 33 at the bottom via the fixed actuator 11, causing the grinding disc 33 to form a non-linear, non-repeating motion trajectory on the horizontal plane. Each revolution's path differs slightly from the previous revolution, ensuring that the workpiece surface fully contacts the abrasive.

[0025] Furthermore, a locking assembly is provided inside the power housing 4; the locking assembly includes a control lever 12, a connecting rod 13, a positioning clamp 14, a locking pin 15, a connecting ring 16, a compression spring 17, and a guide sleeve 18. The guide sleeve 18 is disposed on the inner wall of the power housing 4, one end of the compression spring 17 is disposed on the inner wall of the power housing 4, and the other end of the compression spring 17 is disposed on the outer wall of the connecting ring 16. The connecting ring 16 is disposed on the outer periphery of the locking pin 15, and ball grooves are symmetrically formed on the outer wall of the connecting ring 16. The compression spring 17 is sleeved on the outer periphery of the locking pin 15. Locking pin 15, connecting ring 16, and compression spring 17 are all located inside guide sleeve 18. The outer wall of locking pin 15 has symmetrical grooves 30. Positioning clamp 14 is located on the outer wall of locking pin 15 through the grooves 30. Control lever 12 is rotatably located on the outer wall of power housing 4. One end of connecting rod 13 is rotatably located at the output end of control lever 12, and the other end of connecting rod 13 is fixedly located on the outer wall of positioning clamp 14. Two balls 32 are symmetrically installed on the inner wall of guide sleeve 18. The two balls 32 correspond one-to-one with the ball grooves on the outer wall of connecting ring 16.

[0026] Under normal positioning, the compression spring 17 is in a compressed state, and its elastic force pushes the locking pin 15 to extend to the right through the connecting ring 16. At this time, the right end of the locking pin 15 maintains a small gap with the second rocker arm 10. At the same time, the ball groove on the outer wall of the connecting ring 16 is engaged with the ball 32 on the inner wall of the guide sleeve 18. The ball 32 is embedded in the groove 30, which positions the connecting ring 16 and the locking pin 15, preventing the locking pin 15 from shifting due to equipment vibration, and ensuring that the transmission component can generate a compound trajectory normally.

[0027] When switching to the texture generation function, the operator moves the external operating end of the control lever 12 towards the inside of the device. The lever rotates around the side wall pivot, and the end inside the power housing 4 moves, pulling the connecting rod 13 through the pivot. Since the positioning clamp 14 is engaged in the groove 30 of the locking pin 15, the pulling force of the connecting rod 13 drives the locking pin 15 to move through the positioning clamp 14. The locking pin 15 drives the connecting ring 16 fixed thereon to move synchronously. At the same time, the movement of the connecting ring 16 causes the outer wall ball groove to gradually disengage from the ball 32 in the guide sleeve 18. The ball 32 slides out of the groove 30 and fits against the outer wall of the connecting ring 16, releasing the radial positioning of the connecting ring 16 and ensuring that the locking pin 15 can move smoothly. When the lever 15 moves to the target position, the top of the locking pin 15 is tightly inserted into the round hole 34 of the second rocker arm 10, forming a rigid support for the second rocker arm 10. At this time, the control lever 12 is stopped. Under the balance of the tension of the connecting rod 13 and the elasticity of the compressed spring 17, the locking pin 15 remains fixed, completely restricting the rotation of the second rocker arm 10 around the bottom mounting base. The second rocker arm 10 changes from a movable part to a fixed bracket, so that the movement of the triangular floating block 8 is only constrained by the coupling rod 7 and the first rocker arm 9. The trajectory changes from a nonlinear composite trajectory to a regular periodic trajectory. The polishing disc 33 moves with this trajectory, so that decorative textures can be processed on the surface of the appliance coating. Unlock and Reset: To restore the scratch-free polishing function, reverse the control lever 12. The lever drives the connecting rod 13 to move to the right, which pushes the connecting ring 16 and the locking pin 15 to move to the right simultaneously through the positioning clamp 14. As the connecting ring 16 moves to the right, the compression spring 17 is compressed until the ball groove on the outer wall of the connecting ring 16 engages again with the ball 32 in the guide sleeve 18. The right end of the locking pin 15 and the second rocker arm 10 restore the gap. At this time, release the control lever 12, the locking component returns to the normal positioning state, the transmission component can regenerate the composite trajectory, and the equipment restores the scratch-free polishing function.

[0028] Specifically, a drive assembly is fixedly installed on the top of the base plate 1; the drive assembly includes a mounting plate 19, a slider 20, a motor 28, and a drive wheel 29. The mounting plate 19 is installed on the top of the base plate 1 and has a groove 31. The slider 20 is slidably mounted on the mounting plate 19 through the groove 31. The motor 28 is installed on the top of the slider 20. The drive wheel 29 is installed on the drive end of the motor 28. The central axes of the drive wheel and the driven wheel are normally located on the same horizontal plane, and the grooves of the drive wheel and the driven wheel are provided with anti-detachment guards. The mounting plate 19 has multiple evenly distributed positioning holes 22. Two positioning pins 21 are slidably installed on the top of the slider 20.

[0029] Preferably, the top of the slider 20 is slidably provided with two positioning pins 21 for passing through the slider 20 and inserting into the positioning holes 22 of the mounting plate 19.

[0030] A ring-shaped transmission belt is fitted between the driving wheel 29 and the driven wheel 5. Before use, the operator pulls the positioning pin 21 upwards, completely disengaging it from the positioning hole 22 of the mounting plate 19. Then, the operator pushes the slider 20 along the slide groove 31 with both hands, simultaneously observing the tension of the transmission belt during the sliding process. The operator pushes the slider 20 until the belt is at a moderate tension to avoid slippage due to excessive belt looseness. Once the transmission belt is tensioned, the operator aligns the positioning pin 21 with the through hole at the top of the slider 20 and presses the positioning pin 21 downwards with both hands until it passes through the through hole of the slider 20 and is fully engaged in the positioning hole 22 of the mounting plate 19. At this point, the slider 20 is firmly fixed to the mounting plate 19, ensuring that the center distance between the driving wheel 29 and the driven wheel 5 remains unchanged and the belt tension remains stable.

[0031] Furthermore, the outer wall of the column 2 is provided with an adjustment component, which includes a support ear 23 and a lifting arm 24. The support ear 23 is located on the outer wall of the column 2, and the lifting arm 24 is rotatably mounted on the outer wall of the support ear 23. The lifting arm 24 is fixedly mounted on the bottom of the power housing 4. The support ear 23 is located above the workbench 25 and below the mounting bracket 3.

[0032] Before or during grinding, if the surface of the appliance workpiece to be processed is curved, the operator operates the lifting arm 24 according to the curvature of the workpiece's curved surface. The lifting arm 24 will rotate around the pivot of the support lug 23, causing the power housing 4 to tilt around the connection point between the mounting bracket 3 and the power housing 4 as the fulcrum. During the tilting process of the power housing 4, the bottom actuator 11 and the grinding disc 33 will change their angles synchronously until the bottom surface of the grinding disc 33 is completely in contact with the curved surface of the workpiece. The entire angle adjustment is controlled within a suitable range. Since the grooves of the drive wheel 29 and the driven wheel 5 are equipped with anti-detachment guards, and the central axes of the two wheels are normally located on the same horizontal plane, the belt can still remain in the groove when tilting, preventing it from falling off and avoiding the angle adjustment affecting the power transmission.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A household appliance coating sander, comprising a base plate (1) and a device body, the device body comprising a column (2), a mounting bracket (3), a power housing (4), a worktable (25), and a positioning threaded rod (26), wherein the column (2) is fixedly mounted on the top of the base plate (1), the mounting bracket (3) is fixedly mounted on the top of the column (2), the power housing (4) is rotatably mounted on the mounting bracket (3), and the worktable (25) is sleeved on the outer periphery of the column (2), characterized in that: A transmission assembly is provided on the top of the power housing (4); a locking assembly is provided inside the power housing (4); and a drive assembly is fixedly provided on the top of the base plate (1). An adjustment assembly is provided on the outer wall of the column (2). The adjustment assembly includes a support lug (23) and a lifting arm (24). The support lug (23) is provided on the outer wall of the column (2). The lifting arm (24) is rotatably provided on the outer wall of the support lug (23). The lifting arm (24) is fixedly provided at the bottom of the power housing (4).

2. The household appliance coating sander according to claim 1, characterized in that: The transmission assembly includes a driven wheel (5), a driving crank (6), a coupling rod (7), a triangular floating block (8), a first rocker arm (9), and a second rocker arm (10). The driven wheel (5) is mounted on the top of the power housing (4). The left and right ends of the coupling rod (7) are rotatably connected to the driving crank (6) and the first rocker arm (9), respectively. The driving crank (6) is located at the bottom of the driven wheel (5). Holes are provided at all three ends of the triangular floating block (8). The triangular floating block (8) is rotatably located in the middle of the coupling rod (7) through the first end.

3. A household appliance coating sander according to claim 1, characterized in that: The locking assembly includes a control lever (12), a connecting rod (13), a positioning clamp (14), a locking pin (15), a connecting ring (16), a compression spring (17), and a guide sleeve (18). The guide sleeve (18) is disposed on the inner wall of the power housing (4). One end of the compression spring (17) is disposed on the inner wall of the power housing (4), and the other end of the compression spring (17) is disposed on the outer wall of the connecting ring (16). The connecting ring (16) is disposed on the outer periphery of the locking pin (15). The outer wall of the connecting ring (16) is symmetrically provided with ball grooves. The compression spring (15) 17) Sleeve around the locking pin (15), the locking pin (15), the connecting ring (16), and the compression spring (17) are all located inside the guide sleeve (18). The outer wall of the locking pin (15) is symmetrically provided with grooves (30). The positioning clamp (14) is located on the outer wall of the locking pin (15) through the grooves (30). The control lever (12) is rotatably located on the outer wall of the power housing (4). One end of the connecting rod (13) is rotatably located at the output end of the control lever (12). The other end of the connecting rod (13) is fixedly located on the outer wall of the positioning clamp (14).

4. A household appliance coating sander according to claim 1, characterized in that: The drive assembly includes a mounting plate (19), a slider (20), a motor (28), and a drive wheel (29). The mounting plate (19) is located on the top of the base plate (1). The mounting plate (19) is provided with a sliding groove (31). The slider (20) is slidably mounted on the mounting plate (19) through the sliding groove (31). The motor (28) is located on the top of the slider (20). The drive wheel (29) is mounted on the drive end of the motor (28). The central axis of the drive wheel (29) and the driven wheel (5) are normally located on the same horizontal plane. The grooves of the drive wheel (29) and the driven wheel (5) are provided with anti-detachment guards.

5. A household appliance coating sander according to claim 2, characterized in that: The second end of the triangular floating block (8) is rotatably provided with a second rocker arm (10). The first rocker arm (9) and the second rocker arm (10) are both rotatably provided at the bottom of the inner wall of the power housing (4). A round hole (34) is provided on the second rocker arm (10).

6. A household appliance coating sander according to claim 1, characterized in that: The column (2) is provided with a plurality of evenly distributed threaded holes (27), and the workbench (25) is sleeved on the outer wall of the column (2) by a positioning threaded rod (26).

7. A household appliance coating sander according to claim 2, characterized in that: The third end of the triangular floating block (8) is fixedly connected to an actuator (11), and a grinding disc (33) is provided at the bottom of the actuator (11).

8. A household appliance coating sander according to claim 3, characterized in that: Two balls (32) are symmetrically installed on the inner wall of the guide sleeve (18), and the two balls (32) correspond one-to-one with the ball grooves on the outer wall of the connecting ring (16).

9. A household appliance coating sander according to claim 4, characterized in that: The mounting plate (19) has a plurality of evenly distributed positioning holes (22), and the top of the slider (20) has two positioning pins (21).

10. A household appliance coating sander according to claim 1, characterized in that: The lug (23) is located above the workbench (25) and below the mounting bracket (3).

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