Grinding disc

Abstract

The utility model belongs to the technical field of wall surface polishing equipment, and particularly relates to a polishing disc which comprises a supporting plate and a fusible interlining, a supporting assembly is arranged between the supporting plate and the fusible interlining, a polishing piece is detachably arranged on the side, away from the supporting assembly, of the fusible interlining, the supporting assembly comprises a soft supporting pad, a hard supporting pad is arranged on the soft supporting pad, or the hard supporting pad is arranged on the soft supporting pad. A hard supporting pad is arranged between the fusible interlining and the grinding piece, the soft supporting pad extends to the position between the hard supporting pad and the supporting plate, and the soft supporting pad and the hard supporting pad can jointly support the fusible interlining.

Description

Technical Field

[0001] This utility model belongs to the technical field of wall sanding equipment, and specifically relates to a sanding disc. Background Technology

[0002] A wall sander, also known as a wall grinder, wall sander, putty sander, or polisher, is a tool that replaces the traditional method of manual sanding of walls or objects. The sanding disc is an important component of the wall sander, and most sanding discs are equipped with detachable diamond grinding discs, sandpaper grinding discs, etc. During use, the power head drives the sanding disc to rotate or reciprocate, thereby driving the grinding discs to sand the wall.

[0003] To reduce the impact of wall sanders on the wall surface, most sanding discs use sponges for cushioning. For example, Chinese utility model patent CN 202021072072.4 discloses a natural strong ceiling wall sanding disc, which includes a base, sponge, nylon hook surface and flocked sandpaper arranged in sequence. The sponge has an annular groove in its circumference. The annular groove includes a first annular groove and a second annular groove arranged in sequence from the outside to the inside. The width of the first annular groove is greater than the width of the second annular groove. The first annular groove transitions to the second annular groove through a rounded corner.

[0004] While the above structure can reduce the impact on the wall, the sponge is too soft, and for uneven walls, the bumps need to be sanded for a long time or cannot be sanded out at all, which affects the worker's work efficiency and the sanding effect. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of this utility model is to provide a grinding disc with high grinding efficiency and good grinding effect.

[0006] The purpose of this utility model is achieved as follows:

[0007] A grinding disc includes a support plate and an adhesive backing. A support assembly is disposed between the support plate and the adhesive backing. A grinding disc is detachably disposed on the side of the adhesive backing away from the support assembly. The support assembly includes a soft support pad and a hard support pad disposed on the soft support pad. Alternatively, a hard support pad is disposed between the adhesive backing and the grinding disc, and the soft support pad extends between the hard support pad and the support plate. The soft support pad and the hard support pad can jointly support the adhesive backing.

[0008] The present invention is further configured such that: a fixing groove is provided at one end of the soft support pad near the adhesive backing, and the hard support pad is fixedly disposed in the fixing groove, with one end of the hard support pad being flush with one end of the soft support pad and supporting the adhesive backing respectively.

[0009] The present invention is further configured such that: the rigid support pad is installed below the adhesive backing, the adhesive backing is fixedly connected to the grinding disc and the rigid support pad is pressed against the adhesive backing.

[0010] The present invention is further configured such that the rigid support pad is in the shape of a ring or a disk, and the rigid support pad is disposed at the center of the soft support pad.

[0011] The present invention is further configured such that: the soft support pad is provided with a first annular support surface near the adhesive end, and the outer diameter of the hard support pad is 1 / 4 to 1 / 2 of the outer diameter of the first support surface.

[0012] The present invention is further configured such that: the soft support pad extends outward from one end near the adhesive backing to form a support protrusion.

[0013] The present invention is further configured such that the outer diameters of the adhesive liner and the soft support pad are both larger than the outer diameter of the support plate.

[0014] The present invention is further configured such that: a fixing hole is provided on the support plate, a metal insert is fixedly provided in the fixing hole, a clearance groove is provided on the support assembly, a connecting hole is provided on the adhesive liner, the connecting hole, the clearance groove and the fixing hole are connected in sequence, and the clearance groove penetrates through the soft support pad and the hard support pad.

[0015] The present invention is further configured such that the rigid support pad is a metal sheet or a rigid plastic sheet.

[0016] The present invention is further configured such that the thickness of the rigid support pad is between 0.2-3mm.

[0017] The advantages of this utility model compared to the prior art are:

[0018] 1. In this utility model, the soft support pad can reduce the impact of the sanding disc on the wall during use and effectively sand the concave points on the wall, while the hard support pad can effectively support the sanding disc, reducing the deformation of the sanding disc during sanding. This allows the sanding disc to effectively sand the convex points on the wall, which is beneficial to improving the sanding effect and efficiency of the sanding disc and making it convenient for users. In addition, since the soft support pad extends between the hard support pad and the support plate, it avoids excessive impact on the wall from the sanding disc part corresponding to the hard support pad during use, which is beneficial to improving the sanding effect of the sanding disc.

[0019] 2. The fixing groove provided at the end of the soft support pad near the adhesive backing facilitates effective support of the hard support pad for the grinding disc, preventing bending and deformation of the grinding disc corresponding to the hard support pad during use, which would affect the effective grinding of protrusions on the wall surface. This improves the grinding effect and efficiency of the grinding disc and makes it more convenient for users. Since the hard support pad is installed below the adhesive backing, and the adhesive backing is fixedly connected to the grinding disc and presses the hard support pad against the adhesive backing, the hard support pad can be disassembled by removing the adhesive backing from the grinding disc. This facilitates the flexible disassembly and installation of the hard support pad, allowing users to modify ordinary grinding discs into the grinding disc described in this utility model.

[0020] 3. The hard support pad located in the center of the soft support pad in this utility model can prevent the side of the hard support pad from directly contacting the wall during use, thereby preventing the grinding disc from damaging the wall surface. In addition, since the hard support pad is in the shape of a ring or a disc, it is conducive to the high-speed rotation of the grinding disc and is convenient for users. Since the outer diameter of the hard support pad is 1 / 4 to 1 / 2 of the outer diameter of the first support surface, this structure is not only conducive to the grinding disc part corresponding to the hard support pad to fully grind the protrusions on the wall surface, but also conducive to the grinding disc part corresponding to the soft support pad to fully grind the concave points on the wall surface, which helps to improve the grinding effect and grinding efficiency of the grinding disc.

[0021] 4. The support protrusion in this invention facilitates increasing the installation area of ​​the grinding disc, and this structure makes the outer periphery of the soft support pad more flexible, which facilitates the grinding disc's step-by-step grinding of the wall surface and improves the grinding effect. Since the outer diameters of the lining and the soft support pad are larger than the outer diameter of the support plate, the support plate is prevented from hitting the wall surface during use, thus avoiding damage to the grinding disc and extending its service life. The sequentially connected connecting holes, clearance grooves, and fixing holes facilitate the disassembly and installation of the grinding disc. Furthermore, since the clearance grooves penetrate both the soft and hard support pads, the soft and hard support pads are easily integrated into the injection molding process during production, which facilitates the manufacturing and processing of the grinding disc.

[0022] 5. In this utility model, the rigid support pad is made of metal sheet or rigid plastic sheet, which has high strength and is conducive to effectively supporting the grinding disc and reducing the deformation of the grinding disc during the grinding process. Since the thickness of the rigid support pad is between 0.2-3mm, its thickness is small and its weight is light, which helps to reduce the mass of the grinding disc and avoid the user's arm fatigue caused by the heavy weight of the grinding disc during use, thus improving the grinding efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a cross-sectional view of the rigid support pad disposed on the soft support pad in this utility model;

[0025] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 This is an exploded view of the rigid support pad placed on the soft support pad in this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the soft support pad when the rigid support pad is placed on the soft support pad in this utility model;

[0028] Figure 6 This is a partial sectional view of the rigid support pad in this utility model, placed between the adhesive liner and the grinding disc. The reference numerals in the figure have the following meanings: 1-Support plate; 11-Fixing hole; 2-Soft support pad; 21-Fixing groove; 22-Void groove; 23-Supporting protrusion; 3-Rigid support pad; 4-Adhesive liner; 41-Connecting hole; 5-Metal insert; 6-Grinding disc. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0030] See Figures 1 to 6 As shown, a grinding disc includes a support plate 1 and an adhesive backing 4. A support assembly is disposed between the support plate 1 and the adhesive backing 4. A grinding disc 6 is detachably disposed on the side of the adhesive backing 4 away from the support assembly. The support assembly includes a soft support pad 2, on which a hard support pad 3 is disposed. Alternatively, a hard support pad 3 is disposed between the adhesive backing 4 and the grinding disc 6, with the soft support pad 2 extending between the hard support pad 3 and the support plate 1. The soft support pad 2 and the hard support pad 3 can jointly support the adhesive backing. In this structure, the soft support pad 2 can reduce the impact of grinding discs during use. The grinding disc impacts the wall surface and effectively polishes the concave points on the wall surface. The hard support pad 3 can effectively support the grinding disc 6, reducing the deformation of the grinding disc 6 during the polishing process. This allows the grinding disc to effectively polish the convex points on the wall surface, which is beneficial to improving the polishing effect and efficiency of the grinding disc and making it convenient for users. In addition, since the soft support pad 2 extends between the hard support pad 3 and the support plate 1, it avoids excessive impact on the wall surface of the part of the grinding disc 6 corresponding to the hard support pad 3 during use, which is beneficial to improving the polishing effect of the grinding disc.

[0031] In this embodiment, the adhesive liner 4 can be made of nylon hook surface or adhesive that can bond the grinding disc 6. The grinding disc 6 is provided with a nylon velvet surface or adhesive surface that can be detachably connected to the adhesive liner 4. This structure is prior art and is widely used in grinding discs. Those skilled in the art can implement this structure based on the description of this utility model.

[0032] In this invention, when the rigid support pad 3 is placed on the soft support pad 2, the rigid support pad 3 can be integrally injection molded inside the soft support pad 2 or at the end of the soft support pad 2. The rigid support pad 3 can also be fixed to the soft support pad 2 by adhesive.

[0033] When a rigid support pad 3 is provided between the adhesive backing 4 and the grinding disc 6, a groove for installing the rigid support pad 3 can be provided on the adhesive backing 4 or the grinding disc 6. The rigid support pad 3 can also be directly placed on the surface of the adhesive backing 4 or the grinding disc 6 and protrude from the adhesive backing 4 or the grinding disc 6. In this structure, since the thickness of the rigid support pad 3 can be small, it will not affect the grinding work of the grinding disc. In this structure, the rigid support pad 3 can be fixed to the lower end of the adhesive backing 4 or the upper end of the grinding disc 6 with adhesive. The rigid support pad 3 can also be directly placed between the adhesive backing 4 and the grinding disc 6, and the grinding disc 6 will press the rigid support pad 3 against the adhesive backing 4. This structure does not require gluing the rigid support pad 3 to the adhesive backing 4 or the grinding disc 6, which facilitates the flexible disassembly and installation of the rigid support pad 3. Users can modify ordinary grinding discs into the grinding disc described in this utility model, which is convenient for users.

[0034] The rigid support pad 3 can be fixed to the end of the flexible support pad 2, or it can be fixed inside the flexible support pad 2. In this embodiment, the flexible support pad 2 is provided with a fixing groove 21 near the adhesive backing 4. The rigid support pad 3 is fixedly disposed in the fixing groove 21, and one end of the rigid support pad 3 is flush with one end of the flexible support pad 2 and supports the adhesive backing 4 respectively. The fixing groove 21 provided near the adhesive backing 4 of the flexible support pad 2 facilitates the rigid support pad 3 to effectively support the sanding disc 6, and avoids the bending and deformation of the sanding disc 6 corresponding to the rigid support pad 3 during use, which affects the effective sanding of the protrusions on the wall by the sanding disc. This is beneficial to improving the sanding effect and efficiency of the sanding disc and is convenient for users.

[0035] Preferably, the rigid support pad 3 is in the shape of a ring or a disc, and the rigid support pad 3 is located at the center of the soft support pad 2. The rigid support pad 3 located at the center of the soft support pad 2 can avoid the side of the rigid support pad 3 from directly contacting the wall during use, thereby avoiding damage to the wall surface by the grinding disc. In addition, since the rigid support pad 3 is in the shape of a ring or a disc, it is conducive to the high-speed rotation of the grinding disc and is convenient for the user.

[0036] In this embodiment, the soft support pad 2 has a first annular support surface near the adhesive backing 4. The outer diameter of the hard support pad 3 is 1 / 4 to 1 / 2 of the outer diameter of the first support surface. This structure not only facilitates the full grinding of the protrusions on the wall surface by the grinding disc 6 corresponding to the hard support pad 3, but also facilitates the full grinding of the concave points on the wall surface by the grinding disc 6 corresponding to the soft support pad 2, thereby improving the grinding effect and grinding efficiency of the grinding disc.

[0037] The soft support pad 2 extends outward from one end near the adhesive backing 4 to form a support protrusion 23. The support protrusion 23 facilitates increasing the installation area of ​​the sanding disc 6, and this structure makes the outer periphery of the soft support pad 2 more flexible, which facilitates the sanding disc to sand the wall surface step by step and improves the sanding effect of the sanding disc.

[0038] In this invention, the outer diameters of the adhesive liner 4 and the soft support pad 2 are both larger than the outer diameter of the support plate 1. This structure can prevent the support plate 1 from bumping into the wall during use, thus avoiding damage to the grinding disc and extending the service life of the grinding disc.

[0039] The support plate 1 is provided with a fixing hole 11, and a metal insert 5 is fixedly installed in the fixing hole 11. The grinding disc can be fixedly connected to the power device through the metal insert 5, which facilitates the fixed installation of the grinding disc. The support assembly is provided with a clearance groove 22, and the adhesive liner 4 is provided with a connection hole 41. The connection hole 41, the clearance groove 22 and the fixing hole 11 are connected in sequence. This structure facilitates the disassembly and connection of the fastener and the metal insert 5, and facilitates the disassembly and installation of the grinding disc.

[0040] In this embodiment, the clearance groove 22 penetrates the soft support pad 2 and the hard support pad 3. This structure facilitates the cooperation between the mold core and the hard support pad 3 during the injection molding process, thereby facilitating the positioning and injection molding of the soft support pad 2 and the hard support pad 3, and facilitating the integrated injection molding of the soft support pad 2 and the hard support pad 3 during the production process, which in turn facilitates the production and processing of the grinding disc.

[0041] In this invention, the rigid support pad 3 is preferably made of metal sheet or rigid plastic sheet. The rigid support pad 3 has high strength, which is beneficial for effectively supporting the grinding disc 6 and reducing the deformation of the grinding disc 6 during the grinding process.

[0042] In this embodiment, the thickness of the rigid support pad 3 is between 0.2-3mm. The rigid support pad 3 is thin and light, which helps to reduce the mass of the grinding disc, avoids user arm fatigue caused by the heavy weight of the grinding disc, and helps to improve grinding efficiency.

[0043] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A grinding disc, comprising a support plate (1) and an adhesive backing (4), wherein a support assembly is disposed between the support plate (1) and the adhesive backing (4), and a grinding disc is detachably disposed on the side of the adhesive backing (4) away from the support assembly, characterized in that: The support assembly includes a soft support pad (2), on which a hard support pad (3) is disposed, or, between the adhesive backing (4) and the grinding disc, a hard support pad (3) is disposed, and the soft support pad (2) extends between the hard support pad (3) and the support plate (1), and the soft support pad (2) and the hard support pad (3) can jointly support the adhesive backing (4).

2. A grinding disc according to claim 1, characterized in that: The soft support pad (2) has a fixing groove (21) near the adhesive backing (4), and the hard support pad (3) is fixedly installed in the fixing groove (21). One end of the hard support pad (3) is flush with one end of the soft support pad (2) and supports the adhesive backing (4) respectively.

3. A grinding disc according to claim 1, characterized in that: The rigid support pad (3) is installed below the adhesive backing (4), and the adhesive backing (4) is fixedly connected to the grinding disc and presses the rigid support pad (3) against the adhesive backing (4).

4. A grinding disc according to claim 1, 2, or 3, characterized in that: The rigid support pad (3) is in the shape of a ring or a disk, and the rigid support pad (3) is located at the center of the soft support pad (2) or the adhesive backing (4).

5. A grinding disc according to claim 4, characterized in that: The soft support pad (2) has a first annular support surface near the adhesive backing (4), and the outer diameter of the hard support pad (3) is 1 / 4 to 1 / 2 of the outer diameter of the first support surface.

6. A grinding disc according to claim 1, 2, 3, or 5, characterized in that: The soft support pad (2) extends outward from one end near the adhesive liner (4) to form a support flange (23).

7. A grinding disc according to claim 6, characterized in that: The outer diameters of the adhesive liner (4) and the soft support pad (2) are both larger than the outer diameter of the support plate (1).

8. A grinding disc according to claim 1, 2, 3, 5, or 7, characterized in that: The support plate (1) is provided with a fixing hole (11), and a metal insert (5) is fixedly installed in the fixing hole (11). The support assembly is provided with a clearance groove (22), and the adhesive liner (4) is provided with a connecting hole (41). The connecting hole (41), the clearance groove (22) and the fixing hole (11) are connected in sequence, and the clearance groove (22) penetrates the soft support pad (2) and the hard support pad (3).

9. A grinding disc according to claim 1, 2, 3, 5, or 7, characterized in that: The rigid support pad (3) is a metal plate or a rigid plastic plate.

10. A grinding disc according to claim 9, characterized in that: The thickness of the rigid support pad (3) is between 0.2 and 3 mm.

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