A new dustproof brush ring mounting structure

Abstract

The utility model discloses a novel installation structure of dustproof brush ring, including polishing seat, brush holder and the brush that sets along brush holder top surface periphery, the polishing seat edge is equipped with annular groove along the periphery, the annular groove is equipped with at least two L type grooves in the groove wall, the brush holder is the annular structure of adaptation with annular groove, the convex brush holder is equipped with the slider with L type groove one to one correspondence, the annular groove groove bottom is equipped with the installation groove, the installation groove is equipped with the limiting piece of automatic rebounding and transverse sliding in sliding, the top of limiting piece is equipped with arc -shaped guide slot, the brush holder bottom is equipped with arc -shaped limiting piece, the groove bottom of annular groove is equipped with arc -shaped sliding slot along the periphery, limiting piece can slide along arc -shaped sliding slot. Compared with the prior art, the utility model has the advantages that during installation, only simple steps of "pressing limiting piece - pressing down brush holder - rotating - releasing limiting piece" are needed to complete, and only reverse operation is needed during disassembly, so that disassembly and installation are simple and fast.

Description

Technical Field

[0001] This utility model relates to the field of polishing machine technology, and in particular to a novel installation structure for a dustproof brush ring on a polishing machine. Background Technology

[0002] Wall sanders are commonly used tools in building decoration for fine sanding of wall surfaces. A brush or bristle ring needs to be installed around the sanding end to form a seal while vacuuming, preventing dust from escaping. Since the brush is a consumable part, it will wear down, flatten, or shed bristles after a period of use and must be replaced regularly. Therefore, to improve user experience and reduce maintenance costs, various detachable brush structures have emerged in existing technologies.

[0003] For example, patent publication number CN213795637U discloses a "ceiling wall sander," which has an installation groove on the edge of the dust cover. The elastic deformation of the seal compresses the entire ring of brush bristles into the groove, achieving fixation through an interference fit. Another example is patent publication number CN218592529U, which discloses a "wall sanding device" using a snap-on-slot design. Several slots are arranged circumferentially at the opening of the housing, and corresponding snaps are set on the brush strips. During installation, the snaps are simply pressed into the slots. Both of these structures achieve replaceable brushes and have been widely adopted in the industry.

[0004] However, these solutions still have obvious shortcomings: the interference fit method of the seal requires continuous circumferential compression for each replacement, which is time-consuming, labor-intensive and labor-intensive; although the snap-lock method is easy to install, each snap must be forcibly pried out of the slot with fingers when disassembling, which requires a lot of pulling force and has no fulcrum, making it very unfriendly to operators with less strength. Utility Model Content

[0005] This invention addresses the problem of time-consuming and laborious installation and disassembly of brushes in existing grinding machines. The technical problem to be solved by this invention is to provide a new type of dustproof brush ring installation structure, which is simple and quick to install and disassemble.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: It includes a grinding seat, a brush seat, and a brush arranged circumferentially along the top surface of the brush seat. The grinding seat has an annular groove along its circumferential edge, and the inner wall of the annular groove has at least two L-shaped grooves. The brush seat is an annular structure adapted to the annular groove. A slider corresponding to each L-shaped groove is protruding from the brush seat. The bottom of the annular groove has a mounting groove. A limiting member that can slide laterally and automatically rebound is slidably arranged in the mounting groove. The top surface of the limiting member is... The brush holder has an arc-shaped guide groove, and the bottom of the brush holder is provided with an arc-shaped limiting piece. The bottom of the annular groove is provided with an arc-shaped sliding groove along the circumference. The limiting piece can slide along the arc-shaped sliding groove. When installing the brush holder, the limiting piece is pressed horizontally to make the arc-shaped guide groove and the arc-shaped sliding groove connect. The slider slides vertically along the opening of the L-shaped groove until the arc-shaped limiting piece abuts against the arc-shaped guide groove or the arc-shaped sliding groove. The brush holder is rotated to make the slider slide to the end of the L-shaped groove. After the limiting piece is released, the limiting piece rebounds so that its side abuts against the rear end of the arc-shaped limiting piece.

[0007] A further preferred embodiment of this utility model is as follows: one end of the mounting groove near the outer side penetrates the outer wall of the annular groove; the limiting member includes a limiting block slidably disposed in the mounting groove and a reset spring disposed in the mounting groove; one end of the limiting block extends out of the annular groove through the mounting groove to form a button; one end of the reset spring abuts against the inner wall of the annular groove near the inner side, and the other end abuts against the inner end of the limiting block; and the arc-shaped guide groove is disposed on the top surface of the limiting block.

[0008] A further preferred embodiment of this utility model is as follows: a guide post is provided in the mounting groove, a strip groove is provided at the bottom of the limiting block along its sliding direction, and the upper end of the guide post is located in the strip groove and can slide relative to the strip groove.

[0009] A further preferred embodiment of this utility model is that the radii of the arc-shaped guide groove, the arc-shaped sliding groove, and the arc-shaped limiting piece are equal.

[0010] A further preferred embodiment of this utility model is: the L-shaped groove is provided on the inner wall of the annular groove near the outer side, and the number of the L-shaped grooves is three, which are distributed in a ring array along the circumference of the annular groove.

[0011] A further preferred embodiment of this utility model is: a plurality of arc-shaped limiting pieces are provided and distributed in a circular array along the bottom surface of the brush seat, and the distance between two adjacent arc-shaped limiting pieces is greater than the width of the limiting block.

[0012] A further preferred embodiment of this utility model is that the brush is provided in two rings, each ring consisting of several independent brush bundles, and the inner ring brush bundles are staggered with the outer ring brush bundles.

[0013] A further preferred embodiment of this utility model is that the outer wall of the annular groove is higher than the inner wall of the annular groove.

[0014] A further preferred embodiment of this utility model is: the mounting slot has two slots, and the number of the limiting members is the same as the number of mounting slots.

[0015] Compared with the prior art, this utility model has the following advantages: By using a slider to engage with the L-shaped groove, the brush holder achieves initial circumferential locking. Furthermore, a laterally sliding and automatically rebounding limiting component is installed in the mounting groove at the bottom of the annular groove. The coordinated action of the limiting component's arc-shaped guide groove and the arc-shaped limiting block locks the rotation direction of the brush holder. When installing the brush holder, first press the limiting component to connect the arc-shaped guide groove and the arc-shaped sliding groove. Then, slide and rotate the brush holder along the L-shaped groove to the end of the groove. Finally, release the limiting component, which rebounds to abut its side against the rear end of the arc-shaped limiting piece. This installation method requires only the simple steps of "pressing the limiting component - pressing down on the brush holder - rotating - releasing the limiting component." Disassembly only requires the reverse operation (pressing and then rotating in the opposite direction), making both disassembly and installation simple and quick. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0017] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the limiting member when the brush holder is in the locked state according to a preferred embodiment of the present utility model. Figure 3 This is a preferred embodiment of the present utility model. Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a three-dimensional structural diagram of the limiting member in the pressed state according to a preferred embodiment of the present invention; Figure 5 This is a preferred embodiment of the present utility model. Figure 4 A magnified view of a section at point B in the middle; Figure 6 This is a three-dimensional structural diagram of the limiting member according to a preferred embodiment of the present utility model; Figure 7 This is an exploded view of a preferred embodiment of the present invention.

[0018] In the diagram: 1. Grinding seat; 11. Annular groove; 12. L-shaped groove; 13. Mounting groove; 14. Arc-shaped slide groove; 15. Guide post; 2. Brush seat; 21. Slider; 22. Arc-shaped limiting piece; 3. Brush; 4. Limiting component; 41. Arc-shaped guide groove; 42. Limiting block; 43. Return spring; 44. Button. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0020] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0021] This embodiment mainly describes the installation structure of a novel dustproof brush ring, as detailed below: like Figures 1 to 7As shown, a novel dustproof brush ring mounting structure includes a grinding base 1, a brush base 2, and a brush 3 arranged circumferentially along the top surface of the brush base 2. The grinding base 1 is used to mount the grinding disc and the brush base 2. An annular groove 11 is formed circumferentially along the edge of the grinding base 1, and at least two L-shaped grooves 12 are provided on the inner wall of the annular groove 11. The brush base 2 is designed as an annular structure adapted to the annular groove 11, and a slider 21 corresponding to each L-shaped groove 12 is protruding on the brush base 2. During installation, the slider 21 can first slide vertically into the bottom of the L-shaped groove 12 from the opening, and then rotate the brush base 2 to rotate the slider 21 into the end of the L-shaped groove 12, achieving initial circumferential positioning and locking. An installation groove 13 is also provided at the bottom of the annular groove 11. A limiting member 4 that can slide laterally and automatically rebound is slidably installed in the installation groove 13. The top surface of the limiting member 4 is provided with an arc-shaped guide groove 41, and the limiting piece can slide along the arc-shaped sliding groove 14. An arc-shaped limiting piece 22 is fixed at the bottom of the brush holder 2, and an arc-shaped sliding groove 14 is machined circumferentially at the bottom of the annular groove 11. When installing the brush holder 2, press the limiting member 4 laterally to align its arc-shaped guide groove 41 with the arc-shaped sliding groove 14 at the bottom of the groove, press down the brush holder 2, and let the slider 21 slide vertically into the L-shaped groove 12 until the arc-shaped limiting piece 22 abuts against the arc-shaped guide groove 41 or the arc-shaped sliding groove 14; then rotate the brush holder 2 to let the slider 21 slide to the end of the L-shaped groove 12. Finally, the limiting member 4 is released, and it automatically resets. The arc-shaped guide groove 41 and the arc-shaped sliding groove 14 are no longer connected. At this time, the side of the limiting member 4 abuts against the rear end of the arc-shaped limiting piece 22, thereby reliably locking the brush holder 2 in the rotational direction and preventing it from accidentally loosening during use. This structure enables quick assembly and disassembly of the brush holder 2. Installation can be completed with just one press, one squeeze, and one turn. Disassembly also only requires pressing the limiting member 4 and rotating it in the opposite direction, greatly reducing the difficulty of operation and labor intensity.

[0022] Specifically, the outer end of the mounting groove 13 penetrates the outer wall of the annular groove 11. The limiting member 4 includes a limiting block 42 slidably disposed within the mounting groove 13 and a return spring 43 disposed within the mounting groove 13. One end of the limiting block 42 extends through the mounting groove 13 to the outside of the annular groove 11, forming an easily operable button 44. One end of the return spring 43 abuts against the inner wall of the annular groove 11, and the other end abuts against the inner end of the limiting block 42, providing a continuous return force to the limiting block 42. An arc-shaped guide groove 41 is disposed on the top surface of the limiting block 42. This design exposes the operating components, allowing the user to move the limiting member 4 and compress the return spring 43 by pressing the button 44 with a single finger. The structure is intuitive and the operation is effortless.

[0023] like Figure 7As shown, to stabilize the sliding trajectory of the limiting block 42 and limit its travel, a guide post 15 is also provided in the mounting groove 13, and a strip groove (not shown in the figure) is provided at the bottom of the limiting block 42 along its sliding direction. The upper end of the guide post 15 is located in the strip groove and can slide relative to the strip groove. When the button 44 is pressed until the guide post 15 abuts against the outer end of the strip groove, the limiting block 42 moves into place, and the arc-shaped guide groove 41 at its top is fully connected to the arc-shaped sliding groove 14 at the bottom of the annular groove 11; when the button 44 is released, under the action of the reset spring 43, the guide post 15 abuts against the inner end of the strip groove, at which time the arc-shaped guide groove 41 and the arc-shaped sliding groove 14 are misaligned, and the limiting block 42 returns to the locked position. This guiding structure ensures the accuracy and reliability of the action and prevents the limiting block 42 from moving excessively or tilting.

[0024] Specifically, to ensure that the arc-shaped limiting piece 22 moves smoothly and is accurately positioned in the guide groove and slide, the arc-shaped guide groove 41, the arc-shaped slide 14 and the arc-shaped limiting piece 22 are designed with equal radii. This ensures that the limiting piece maintains a consistent contact trajectory during rotation, reduces jamming, and improves the smoothness of operation and assembly accuracy.

[0025] Specifically, the L-shaped groove 12 is set on the outer inner wall of the annular groove 11. The number of L-shaped grooves 12 is preferably three, and they are arranged in a ring array along the circumference of the annular groove 11. This layout makes full use of the structural strength of the outer wall of the annular groove 11, so that the slider 21 is subjected to more reasonable force. At the same time, the array distribution ensures the uniformity and stability of the force on the brush seat 2.

[0026] like Figure 7 As shown, to further enhance the rotation locking effect and distribute the force, several arc-shaped limiting pieces 22 are provided, which are distributed in a circular array along the bottom surface of the brush holder 2. The spacing between two adjacent arc-shaped limiting pieces 22 is designed to be greater than the width of the limiting block 42, so as to ensure that at least one limiting piece can be effectively held by the limiting block 42 when rotated to the locking position, while allowing the brush holder 2 to have appropriate adjustment margin during installation.

[0027] like Figure 1 and Figure 7 As shown, the brush 3 has two concentric rings, each composed of several independent brush bundles, with gaps between adjacent brush bundles. Crucially, the brush bundles of the inner and outer rings of brush 3 are staggered, meaning the brush bundles of the inner ring correspond precisely to the gaps between the brush bundles of the outer ring. This staggered arrangement effectively fills any dust-proof gaps that might occur in a single ring of brushes, forming a continuous and dense bristle barrier, significantly improving overall sealing and dust-proof performance.

[0028] Specifically, the structure of the annular groove 11 is designed such that the groove wall near the outer side is higher than the groove wall near the inner side. This asymmetrical groove wall height helps guide the brush holder 2 to be more easily aligned during installation, while the higher outer wall can, to some extent, prevent dust from the inner side from escaping from the grinding holder 1.

[0029] Specifically, there are two mounting slots 13, and the number of corresponding limiting components 4 is the same as the number of mounting slots 13. The two limiting mechanisms share the locking force, making the locking of the brush holder 2 more balanced and secure, further preventing loosening due to single-point failure or uneven force. The number of mounting slots 13 and limiting components 4 can be set to multiple as needed, but for ease of operation, it is usually set to one or two.

[0030] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] The above provides a detailed description of the installation structure of a novel dustproof brush ring provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A novel dustproof brush ring mounting structure, comprising a grinding base, a brush base, and a brush arranged circumferentially along the top surface of the brush base, characterized in that: The grinding seat has an annular groove along its circumferential edge. The inner wall of the annular groove has at least two L-shaped grooves. The brush seat is an annular structure adapted to the annular groove. The brush seat has a slider that protrudes and corresponds one-to-one with the L-shaped groove. The bottom of the annular groove has an installation groove. A limiting member that can slide laterally and automatically rebound is slidably installed in the installation groove. The top surface of the limiting member has an arc-shaped guide groove. The bottom of the brush seat has an arc-shaped limiting piece. The bottom of the annular groove has an arc-shaped sliding groove along its circumferential direction. The limiting piece can slide along the arc-shaped sliding groove. When installing the brush seat, the limiting member is pressed laterally to make the arc-shaped guide groove and the arc-shaped sliding groove connect. The slider slides vertically along the opening of the L-shaped groove until the arc-shaped limiting piece abuts against the arc-shaped guide groove or the arc-shaped sliding groove. The brush seat is rotated to make the slider slide to the end of the L-shaped groove. After releasing the limiting member, the limiting member rebounds so that its side abuts against the rear end of the arc-shaped limiting piece.

2. The installation structure of a novel dustproof brush ring according to claim 1, characterized in that: The mounting groove extends through the outer wall of the annular groove at one end. The limiting member includes a limiting block slidably disposed in the mounting groove and a reset spring disposed in the mounting groove. One end of the limiting block extends through the mounting groove and out of the annular groove to form a button. One end of the reset spring abuts against the inner wall of the annular groove, and the other end abuts against the inner end of the limiting block. The arc-shaped guide groove is disposed on the top surface of the limiting block.

3. The installation structure of a novel dustproof brush ring according to claim 2, characterized in that: The mounting groove is provided with a guide post, and the bottom of the limiting block is provided with a strip groove arranged along its sliding direction. The upper end of the guide post is located in the strip groove and can slide relative to the strip groove.

4. The installation structure of a novel dustproof brush ring according to claim 1, characterized in that: The radii of the arc-shaped guide groove, the arc-shaped sliding groove, and the arc-shaped limiting piece are equal.

5. The installation structure of a novel dustproof brush ring according to claim 1, characterized in that: The L-shaped grooves are located on the inner wall of the annular groove near the outer edge. There are three L-shaped grooves, which are arranged in a circular array along the circumference of the annular groove.

6. The installation structure of a novel dustproof brush ring according to claim 2, characterized in that: The arc-shaped limiting plates are provided in a plurality of them and are arranged in a circular array along the bottom surface of the brush seat. The distance between two adjacent arc-shaped limiting plates is greater than the width of the limiting block.

7. The installation structure of a novel dustproof brush ring according to claim 1, characterized in that: The brush has two rings, each ring consisting of several independent brush bundles, and the inner ring brush bundles are staggered with the outer ring brush bundles.

8. The installation structure of a novel dustproof brush ring according to claim 1, characterized in that: The outer wall of the annular groove is higher than the inner wall.

9. The installation structure of a novel dustproof brush ring according to any one of claims 1-8, characterized in that: The mounting slot has two slots, and the number of the limiting members is the same as the number of mounting slots.

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