Quick-change structure of brush disc

Abstract

This utility model discloses a quick-change brush disc structure, comprising: a brush disc and a power head. The brush disc is connected to the power head via an attachment component and rotates around the rotation axis of the power head. The brush disc includes a large brush disc and a small brush disc, with the small brush disc coaxial with the large brush disc and positioned on the outer inner ring of the large brush disc. The attachment component is coaxially arranged with the power head and includes a protruding corner extending outward along the rotation axis and a threaded hole coaxial with the rotation axis. The large brush disc is inserted into and radially limited by the protruding corner, and axially limited by the small brush disc. The center of the small brush disc is screwed into the threaded hole by a bolt. This utility model has a simple and reliable structure and is easy to assemble and disassemble.

Description

Technical Field

[0001] This utility model relates to a quick-change brush plate structure and belongs to the field of power tool technology. Background Technology

[0002] With the advancement of industrialization, the types and functions of power tools have become increasingly diversified. Among them, the electric cleaning brush is a common power tool. Existing electric cleaning brushes generally consist of a housing, a motor, and a brush head. The motor drives the brush head to rotate, and the rotating brush head scrapes the object or surface to be cleaned. Electric cleaning brushes can be used not only for vehicle cleaning but also for cleaning kitchen items, floors, walls, etc., greatly reducing the difficulty of cleaning for users. Because electric brushes have many applications, different sized brush discs are needed to adapt to different scenarios. Replacing the brush discs affects the user experience. Furthermore, since the brush discs frequently rotate at high speeds and rub against the parts that need to be polished, a tight connection is required. Therefore, a quick-change structure that is easy to assemble and disassemble while maintaining a stable connection is necessary. Utility Model Content

[0003] The purpose of this utility model is to overcome the problems existing in the prior art and provide a quick-change brush plate structure that can use a small brush plate as a connector between a large brush plate and a power head. At the same time, the small brush plate can also be used independently, achieving two functions with a single brush plate. The structure is simple, reliable, and easy to assemble and disassemble.

[0004] To solve the above technical problems, this utility model aims to provide a quick-change brush disc structure, including: a brush disc and a power head, wherein the brush disc is connected to the power head via an attachment component and rotates around the rotation axis of the power head. The brush disk includes a large brush disk and a small brush disk, wherein the small brush disk is coaxial with the large brush disk and is located on the outer inner ring of the large brush disk; The accessory assembly is coaxially arranged with the power head, and the accessory assembly includes a convex angle extending outward along the rotation axis and a threaded hole coaxially arranged with the rotation axis; The large brush disc is inserted and radially limited at the convex angle, the large brush disc is axially limited at the small brush disc, and the center of the small brush disc is screwed to the threaded hole by a bolt.

[0005] Furthermore, the large brush disk has a through-hole in the middle, and the end of the through-hole away from the bristles has a through hole that matches the shape of the convex angle. A connecting plate is provided between the through hole and the through-hole. The insertion ring extends inward to form a limiting shoulder, which abuts against the side wall of the convex corner to receive the torque transmitted by the convex corner. The limiting shoulder and the insertion ring together form a convex corner receiving cavity.

[0006] Furthermore, the small brush disc is provided with a mounting bolt in the middle, and the small brush disc is also provided with an annular groove that matches the plug ring. The end of the plug ring is embedded in the annular groove and abuts against the annular groove.

[0007] Furthermore, the mounting bolts are stainless steel bolts.

[0008] Furthermore, the convex corners are provided in four shapes, forming a cross, with the included angle between each convex corner being 90°.

[0009] Furthermore, the outer diameter of the insertion ring is smaller than the inner diameter of the annular groove, and the outer diameter of the convex corner is smaller than the outer diameter of the small brush disc.

[0010] Furthermore, the bottom shape of the through hole matches the shape of the convex angle, the limiting shoulder is tapered, one side of the limiting shoulder is adjacent to the through hole, and the other side of the limiting shoulder is connected to the connecting plate.

[0011] Compared with existing technologies, this utility model achieves the following beneficial effects: 1. The small brush disc can be used to connect the large brush disc and the power head, or it can be used alone as a small brush disc, realizing two functions in a convenient and quick manner. 2. The small brush disc is connected by a threaded connection, which makes the structure stable, prevents the brush disc from falling off, and is inexpensive. Attached Figure Description

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The drawings are provided for reference and illustration only and are not intended to limit the present invention.

[0013] Figure 1 This is a cross-sectional view of the quick-change brush plate structure of this utility model; Figure 2 This is a three-dimensional exploded view of the quick-change brush plate structure of this utility model; Figure 3 This is a perspective view of the small brush disc in this utility model; Figure 4 This is a front view of the large brush disk in this utility model; Figure 5 This is an assembly diagram of the large brush disk and the attached components in this utility model.

[0014] Reference numerals: 1. Power head, 2. Attachment component, 2a. Convex corner, 2b. Threaded hole, 3. Large brush disc, 3a. Insertion ring, 3b. Through hole, 3c. Connecting plate, 3d. Limiting shoulder, 4. Small brush disc, 4a. Bolt, 4b. Annular groove. Detailed Implementation

[0015] In the following description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device must have a specific orientation.

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0018] like Figures 1 to 3 As shown, this utility model discloses a quick-change brush disc structure, including a brush disc and a power head 1. The brush disc is connected to the power head 1 via an attachment component 2 and rotates around the rotation axis of the power head 1. The attachment component 2 is located at the output end of the power head 1. The brush disc includes a large brush disc 3 and a small brush disc 4. The small brush disc 4 is coaxial with the large brush disc 3 and is located on the outer inner ring of the large brush disc 3. The attachment component 2 is coaxially arranged with the power head 1 and includes a convex angle 2a extending outward along the rotation axis and a threaded hole 2b coaxial with the rotation axis. The large brush disc 3 is inserted into and radially limited by the convex angle 2a, and axially limited by the small brush disc 4. The small brush disc 4 is screwed into the threaded hole 2b. There are four convex angles 2a arranged in a "cross" shape, and the included angle between each convex angle 2a is 90° to ensure uniform torque transmission and improve connection stability.

[0019] like Figure 4 and Figure 5 As shown, the large brush disk 3 has a through-hole ring 3a in the middle. The end of the ring 3a furthest from the bristles has a through hole 3b that matches the shape of the convex angle 2a. A connecting plate 3c connects the through hole 3b and the ring 3a. The ring 3a extends inwards with a limiting shoulder 3d, which receives the torque transmitted by the convex angle 2a. The limiting shoulder 3d and the ring 3a form a cavity for receiving the convex angle. The outer diameter of the ring 3a is smaller than the inner diameter of the annular groove 4b, and the outer diameter of the convex angle 2a is smaller than the outer diameter of the small brush disk 4. The ring 3a of the large brush disk 3 is aligned with the convex angle 2a of the attachment component 2, inserted, and rotated to engage the through hole 3b with the convex angle 2a, achieving radial limiting. The bottom shape of the through hole matches the shape of the convex angle 2a. The limiting shoulder 3d is conical, with one side adjacent to the through hole 3b and the other side connected to the connecting plate 3c.

[0020] The small brush disc 4 has a mounting bolt 4a in the middle, which is a stainless steel bolt. The small brush disc 4 also has an annular groove 4b that matches the insertion ring 3a. The end of the insertion ring 3a is embedded in the groove 4b and abuts against it. The bolt 4a of the small brush disc 4 is screwed into the threaded hole 2b of the attachment component 2. The end of the insertion ring 3a is embedded in the annular groove 4b and contacts the bottom surface of the groove, achieving axial positioning. Loosening the bolt 4a of the small brush disc 4 allows the large brush disc 3 to be removed from the attachment component 2. If only the small brush disc 4 is needed, it can be directly screwed into the threaded hole 2b of the power head 1 without installing the large brush disc 3.

[0021] The large brush 3 connects to the attachment component 2 via a plug-in connection, while the small brush 4 is screwed on. Operation is simple, and disassembly and assembly can be completed without additional tools. In car washing, users can use the large brush 3 for large-area cleaning, or replace it with the small brush 4 to handle corner areas.

[0022] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. A quick-change structure for a brush disk, comprising: A brush disc and a power head, wherein the brush disc is connected to the power head via an attachment assembly and rotates about the rotation axis of the power head, characterized in that: the brush disc includes a large brush disc and a small brush disc, the small brush disc being coaxial with the large brush disc and positioned on the outer inner ring of the large brush disc; the attachment assembly is coaxially arranged with the power head, the attachment assembly including a convex angle extending outward along the rotation axis and a threaded hole coaxially arranged with the rotation axis; the large brush disc is inserted into and radially limited by the convex angle, the large brush disc is axially limited by the small brush disc, and the center of the small brush disc is screwed to the threaded hole by a bolt.

2. The quick-change brush disk structure according to claim 1, characterized in that: The large brush plate has a through-hole in the middle. The end of the through-hole away from the bristles has a through hole that matches the shape of the convex corner. A connecting plate is provided between the through hole and the through-hole. The through-hole extends inward to form a limiting shoulder. The limiting shoulder abuts against the side wall of the convex corner to receive the torque transmitted by the convex corner. The limiting shoulder and the through-hole form a cavity for receiving the convex corner.

3. The quick-change brush disk structure according to claim 2, characterized in that: The small brush disc is provided with a mounting bolt in the middle and an annular groove that matches the plug ring. The end of the plug ring is embedded in the annular groove and abuts against the annular groove.

4. The quick-change brush structure according to claim 3, characterized in that: The mounting bolts are stainless steel bolts.

5. The quick-change brush disk structure according to claim 2, characterized in that: The convex corners are provided in four shapes, forming a cross, with the included angle between each convex corner being 90°.

6. The quick-change brush disk structure according to claim 2, characterized in that: The outer diameter of the insertion ring is smaller than the inner diameter of the annular groove, and the outer diameter of the convex corner is smaller than the outer diameter of the small brush disk.

7. The quick-change brush disk structure according to claim 2, characterized in that: The bottom shape of the through hole matches the shape of the convex angle. The limiting shoulder is tapered, with one side of the limiting shoulder adjacent to the through hole and the other side of the limiting shoulder connected to the connecting plate.

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