Brush disc replacement structure

Abstract

The utility model discloses a kind of brush disc replacement structure, comprising: brush disc and power head, brush disc is connected with power head by attachment assembly and rotates around the rotation axis of power head, attachment assembly is coaxially arranged with power head, attachment assembly includes the convex angle extending outward along rotation axis, brush disc is inserted and radially limited in convex angle, the elastic component that restricts the relative rotation of convex angle and brush disc is clamped between convex angle and brush disc.The utility model can quickly complete the replacement of brush disc, and structure is firm and not easy to wear.

Description

Technical Field

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

[0002] Existing handheld power tools, such as floor brushes from brands like RYOBI and BLACK & DECKER, all use a single-hole or three-point snap-fit ​​brush disc device. This structure relies solely on the elastic deformation of the plastic for axial positioning during assembly, lacking a radial locking mechanism. This can easily lead to the following problems: 1. Under high-frequency vibration, the clearance between the brush disc and the output shaft gradually increases, causing axial movement and radial oscillation, resulting in machine vibration and increased noise; 2. The plastic snap-fit ​​device fatigues and ages under long-term alternating loads and the corrosive effects of cleaning fluids, reducing the locking force and increasing the risk of loosening or even falling off; 3. After repeated disassembly and cleaning, the snap-fit ​​device wears irreversibly, significantly reducing the holding force during reassembly, requiring frequent brush disc replacements and increasing operating costs. Utility Model Content

[0003] The purpose of this invention is to overcome the problems existing in the prior art and provide a brush plate replacement structure that can quickly replace the brush plate and is sturdy and not easily worn.

[0004] To solve the above technical problems, this utility model provides a brush plate replacement structure, including: a brush plate and a power head. The brush plate is connected to the rotation axis of the power head via an attachment component and rotates around the rotation axis of the power head. The attachment component is coaxially arranged with the power head. The attachment component includes a protruding corner extending outward along the rotation axis. The brush plate is inserted into and radially limited by the protruding corner. An elastic component is engaged between the protruding corner and the brush plate to restrict the relative rotation of the protruding corner and the brush plate.

[0005] Furthermore, the brush plate 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 bottom of 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, and the limiting shoulder and the insertion ring form a convex corner receiving cavity.

[0006] Furthermore, the elastic component is an elastic ring clamp, which includes a ring clamp body, a first clamp and a second clamp. The arc surface of the convex corner is provided with an annular groove that matches the ring clamp. The ring clamp body is engaged in the annular groove, and the first clamp and the second clamp abut against the outer wall of the insertion ring.

[0007] Furthermore, the bottom shape of the through hole matches the shape of the convex angle, the limiting shoulder is conical, one side of the limiting shoulder is adjacent to the through hole with the corresponding convex angle shape, and the other side of the limiting shoulder is connected to the connecting plate.

[0008] Furthermore, the ring body abuts against the limiting shoulder.

[0009] Furthermore, four convex corners are provided, arranged in a "cross" shape, with the included angle between each convex corner being 90°.

[0010] Furthermore, the ring is a stainless steel ring.

[0011] Compared with the prior art, the present invention has achieved the following beneficial effects: 1. Simple assembly, low cost of the ring and hoop parts, and even if there are slight size differences in the parts such as protruding corners due to tolerances during the production process, they can be overcome by the elasticity of the ring and hoop itself; 2. Easy to disassemble and assemble, the ring and hoop restrict the mutual rotation between the scrubbing head and the power head, resulting in a good scrubbing effect. 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 structure for the wiping head in this utility model; Figure 2 This is an exploded view of the quick-change wiping head structure in this utility model; Figure 3 This is an end view of the quick-change structure for the wiping head in this utility model; In the diagram: 1. Brush disc, 2. Power head, 3. Convex corner, 3a. Ring groove, 4. Elastic ring clamp, 4a. Ring clamp body, 4b. First chuck, 4c. Second chuck, 5. Insertion ring, 6. Connecting plate, 7. Limiting shoulder. Detailed Implementation

[0014] 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.

[0015] 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.

[0016] 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.

[0017] like Figures 1 to 3 As shown, a wiping head replacement structure of this utility model includes a brush plate 1 and a power head 2. The brush plate 1 is connected to the rotation axis of the power head 2 through an attachment component and rotates around the rotation axis of the power head 2. The attachment component is coaxially arranged with the power head 2. The attachment component includes a protruding corner 3 extending outward along the rotation axis. The brush plate 1 is inserted into and radially limited by the protruding corner 3. An elastic component that restricts the relative rotation of the protruding corner 3 and the brush plate 1 is engaged between the protruding corner 3 and the brush plate 1.

[0018] The brush plate 1 has a through-hole 5 in the middle. The end of the 5 away from the bristles has a through hole that matches the shape of the convex corner 3. A connecting plate 6 is provided between the bottom of the through hole and the 5. The 5 extends inward to form a limiting shoulder 7. The limiting shoulder 7 abuts against the side wall of the convex corner 3 to receive the torque transmitted by the convex corner 3. The limiting shoulder 7 and the 5 form a convex corner receiving cavity.

[0019] The elastic component is an elastic hoop 4, which is made of stainless steel. The elastic hoop 4 includes a hoop body 4a, a first clamp 4b, and a second clamp 4c. The arc surface of the convex corner 3 is provided with an annular groove 3a that matches the elastic hoop 4. The hoop body 4a is engaged in the annular groove 3a. The first clamp 4b and the second clamp 4c abut against the outer wall of the insertion ring 5. The hoop body 4a abuts against the limiting shoulder 7.

[0020] The bottom shape of the through hole matches the shape of the protrusion 3. The limiting shoulder 7 is tapered, with one side of the limiting shoulder 7 adjacent to the through hole corresponding to the shape of the protrusion 3, and the other side of the limiting shoulder 7 connected to the connecting plate 6. There are four protrusions 3, arranged in a "cross" shape, with an included angle of 90° between each protrusion 3.

[0021] The assembly process of the scrubbing head of this utility model is as follows: Align the insertion ring 5 in the middle of the brush plate 1 with the four protruding corners 3 arranged in a "cross" shape at the end of the power head 2, and push it in axially so that the protruding corners 3 are inserted into the through holes on the insertion ring 5 until the limiting shoulder 7 abuts against the side wall of the protruding corner 3. Insert the ring body 4a of the elastic ring 4 into the ring groove 3a on the arc surface of the protruding corner 3, while the first clamp 4b and the second clamp 4c are tightly against the outer wall of the insertion ring 5 to achieve axial limiting.

[0022] The process of disassembling the scrubbing head is as follows: When it is necessary to replace or clean the brush disc, manually press the first clamp 4b and the second clamp 4c of the elastic ring 4 inward so that the ring body 4a is dislodged from the ring groove 3a of the convex corner 3, and then pull the brush disc 1 outward along the axial direction to complete the disassembly.

[0023] This utility model achieves rapid assembly and disassembly between the brush disc 1 and the power head 2 through the insertion and engagement of the protruding corner 3 and the insertion ring 5, combined with the locking and limiting action of the elastic ring clamp 4, thus improving replacement efficiency. Simultaneously, with the cooperation of the limiting shoulder 7, a stable connection is ensured, effectively transmitting torque and guaranteeing the stability of the scrubbing operation. The ring body 4a of the elastic ring clamp 4 engages with the ring groove 3a of the protruding corner 3, and the first clamp 4b and the second clamp 4c abut against the outer wall of the insertion ring 5, forming a bidirectional constraint. This effectively prevents the brush disc 1 from axially loosening or falling off during high-speed rotation or load changes, improving safety. The above description is merely a preferred embodiment of this utility model, showing and describing the basic principles, main features, and advantages of this utility model. It is not intended to limit the patent protection scope of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. Besides the above embodiments, other implementations of this utility model are possible without departing from the spirit and scope of this utility model. Various changes and improvements may be made to this utility model. All technical solutions formed by equivalent substitutions or transformations fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims and their equivalents. Technical features not described in this utility model can be implemented using existing technology and will not be elaborated upon here.

Claims

1. A brush replacement structure, comprising: A brush disc and a power head, wherein the brush disc is connected to the rotation axis of the power head via an attachment assembly and rotates about the rotation axis of the power head, characterized in that: The accessory assembly is coaxially arranged with the power head. The attachment assembly includes a convex angle extending outward along the rotation axis. The brush disk is inserted into and radially limited by the convex angle. An elastic component is engaged between the convex angle and the brush disk to restrict the relative rotation of the convex angle and the brush disk.

2. The brush replacement structure according to claim 1, characterized in that: The brush plate 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 bottom of 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, and the limiting shoulder and the insertion ring form a convex corner receiving cavity.

3. The brush replacement structure according to claim 2, characterized in that: The elastic component is an elastic ring clamp, which includes a ring clamp body, a first clamp and a second clamp. The arc surface of the convex corner is provided with an annular groove that matches the ring clamp. The ring clamp body is engaged in the annular groove, and the first clamp and the second clamp abut against the outer wall of the insertion ring.

4. The brush replacement structure according to claim 3, characterized in that: 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 with the corresponding convex angle shape, and the other side of the limiting shoulder is connected to the connecting plate.

5. The brush replacement structure according to claim 4, characterized in that: The ring body abuts against the limiting shoulder.

6. The brush replacement structure according to claim 1, characterized in that: The convex corners are provided in four shapes, forming a cross, with the included angle between each convex corner being 90°.

7. The brush replacement structure according to claim 2, characterized in that: The ring is a stainless steel ring.

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