Scrub head replacement structure

Abstract

The utility model discloses a kind of scrubbing head 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 and the stop piece coaxially arranged with convex angle, stop piece is located at the inner ring of brush disc;Brush disc is inserted and radially limited in convex angle, brush disc is axially limited in stop piece, the middle part of convex angle is provided with insertion hole, and stop piece is rotatably fixed in insertion hole. 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 cleaning head 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 cleaning head replacement structure that can quickly replace the brush plate and is sturdy and not easily worn.

[0004] To solve the above technical problems, the present invention provides a wiping head 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 component and rotates around the rotation axis of the power head, the attachment component is coaxially arranged with the power head, and the attachment component includes a convex angle extending outward along the rotation axis and a stop member coaxially arranged with the convex angle, the stop member being disposed on the inner ring of the brush disc; The center of the brush disk is inserted into and radially limited to the convex corner, and the brush disk is axially limited to the stop member. The convex corner has an insertion hole in the middle, and the stop member is rotatably fixed to the insertion hole.

[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 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 limiting shoulder is provided with a countersunk hole, and an elastic pin is provided in the countersunk hole. The stop member is provided with a positioning hole that matches the elastic pin, and the head of the elastic pin is inserted into the positioning hole.

[0007] Furthermore, the stop member has a knob in the middle, and the knob extends outward to form a stop lug. The outer edge of the stop lug abuts against a limiting shoulder with an elastic pin and does not exceed the insertion ring.

[0008] Furthermore, the stop lugs are provided in two form and the included angle between the two stop lugs is 180°. The limiting shoulder with the elastic pin is a trapezoidal limiting shoulder, and the two trapezoidal limiting shoulders are arranged facing each other.

[0009] Furthermore, the brush disk is trumpet-shaped, and the radial projection of the stop lug does not exceed the radial projection of the outer edge of the brush disk.

[0010] Furthermore, the stop member has a plug-in post in the middle, and an expansion ring at the end of the plug-in post. The expansion ring has multiple openings, and the plug-in post is inserted into the plug-in hole and can slide along the plug-in hole.

[0011] Furthermore, the convex corners are provided in four shapes, forming a cross, with the included angle between each convex corner being 90°.

[0012] Furthermore, the limiting shoulder without the elastic pin is a tapered limiting shoulder, the bottom shape of the through hole matches the shape of the convex angle, one side of the tapered limiting shoulder is adjacent to the through hole and the other side is connected to the connecting plate.

[0013] Compared with the prior art, the present invention has achieved the following beneficial effects: 1. Simple assembly: The brush plate can be installed or removed by simply inserting and twisting the tool-free quick-release structure, and the structure is stable and will not loosen over a long period of time. 2. Employs metal elastic pins, ensuring structural stability and corrosion resistance; 3. By using the stop lugs and connecting plate to clamp the brush disc between the two, the brush disc can be better secured and prevent it from loosening due to vibration. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is an exploded view of the quick-change structure of the wiping head of this utility model; Figure 2 This is a cross-sectional view of the quick-change structure of the wiping head of this utility model; Figure 3 This is an end view of the wiping head in this utility model; In the diagram: 1. Brush disc, 2. Power head, 3. Protruding corner, 4. Stop, 4a. Knob, 4b. Stop lug, 4c. Insertion post, 4d. Expanding ring, 5. Insertion hole, 6. Insertion ring, 7. Through hole, 8. Limiting shoulder, 8a. Trapezoidal limiting shoulder, 8a1. Countersunk hole, 8b. Conical limiting shoulder, 9. Elastic pin, 10. Connecting plate. Detailed Implementation

[0016] 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.

[0017] 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.

[0018] 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.

[0019] The cleaning 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 and a stop 4 coaxially arranged with the protruding corner 3. The stop 4 is located in the inner ring of the brush plate 1. The center of the brush plate 1 is inserted and radially limited to the convex angle 3, and the brush plate 1 is axially limited to the stop 4. The convex angle 3 is provided with an insertion hole 5, and the stop 4 is rotatably fixed to the insertion hole 5.

[0020] The brush plate 1 has a through-hole ring 6 at its center. The end of the through-hole ring 6 away from the bristles has a through hole 7 that matches the shape of the convex angle 3. A connecting plate 10 is provided between the bottom of the through hole 7 and the through-hole ring 6. The insertion ring 6 extends inward with a limiting shoulder, which abuts against the side wall of the convex corner 3 to receive the torque transmitted by the convex corner 3. The limiting shoulder and the insertion ring 6 form a convex corner receiving cavity.

[0021] The outer end face of the limiting shoulder is provided with a countersunk hole 8a1, and an elastic pin 9 is provided inside the countersunk hole 8a1. The stop member 4 is provided with a positioning hole that matches the elastic pin 9, and the head of the elastic pin 9 is inserted into the positioning hole of the stop member 4. Two stop lugs 4b are symmetrically provided on the outer periphery of the stop member 4, that is, the included angle of the two stop lugs 4b is 180°. The limiting shoulder with elastic pin 9 is a trapezoidal limiting shoulder 8a, and the two trapezoidal limiting shoulders 8a are arranged facing each other. When the stop member 4 is rotated to the locked position, the head of the elastic pin 9 is engaged in the positioning hole, realizing the axial positioning and rotational locking of the stop member 4.

[0022] The stop 4 has a knob 4a in the middle, and a stop lug 4b extends outward from the knob 4a. The outer edge of the stop lug 4b abuts against the limiting shoulder with the elastic pin 9 and does not exceed the insertion ring 6.

[0023] The brush plate 1 is trumpet-shaped, and the radial projection of the stop lug 4b does not exceed the radial projection of the outer edge of the brush plate 1, so as to prevent scratching the ground.

[0024] The inner end of the stop 4 is provided with a plug post 4c, and the end of the plug post 4c is provided with an expansion ring 4d. The expansion ring 4d has multiple openings. The plug post 4c is inserted into the plug hole 5. There are four protrusions 3, which are in the shape of a cross. The included angle between each protrusion 3 is 90°. The stop lug 4b and the connecting plate 10 together hold the brush disk 1, which effectively prevents loosening caused by vibration and improves the stability of operation.

[0025] The limiting shoulder without the elastic pin 9 is a tapered limiting shoulder 8b. The bottom shape of the through hole 7 matches the shape of the convex angle 3. One side of the tapered limiting shoulder 8b is adjacent to the through hole 7 and the other side is connected to the connecting plate 10.

[0026] During installation, align the through hole 7 of brush disc 1 with the four protruding corners 3 on the power head 2, and insert it axially until it is in place; then rotate knob 4a to rotate the stop 4, causing the elastic pin 9 to engage in the positioning hole and complete the locking. During disassembly, gently pull upward and rotate knob 4a to disengage the elastic pin 9 from the positioning hole, allowing brush disc 1 to be pulled out, achieving tool-free quick disassembly with "insert and rotate".

[0027] 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 shampoo head 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 accessory assembly includes a convex angle extending outward along the rotation axis and a stop member coaxially arranged with the convex angle. The stop member is located on the inner ring of the brush plate. The center of the brush disk is inserted into and radially limited to the convex corner, and the brush disk is axially limited to the stop member. The convex corner has an insertion hole in the middle, and the stop member is rotatably fixed to the insertion hole.

2. The wiping head 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 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.

3. The wiping head replacement structure according to claim 2, characterized in that: The limiting shoulder is provided with a countersunk hole, and an elastic pin is provided in the countersunk hole. The stop member is provided with a positioning hole that matches the elastic pin, and the head of the elastic pin is inserted into the positioning hole.

4. The wiping head replacement structure according to claim 3, characterized in that: The stop member has a knob in the middle, and the knob extends outward to form a stop lug. The outer edge of the stop lug abuts against a limiting shoulder with an elastic pin and does not exceed the insertion ring.

5. The wiping head replacement structure according to claim 1, characterized in that: The stop lugs are provided in two places, and the included angle between the two stop lugs is 180°. The limiting shoulder with elastic pin is a trapezoidal limiting shoulder, and the two trapezoidal limiting shoulders are arranged facing each other.

6. The wiping head replacement structure according to claim 5, characterized in that: The brush disk is trumpet-shaped, and the radial projection of the stop lug does not exceed the radial projection of the outer edge of the brush disk.

7. The wiping head replacement structure according to claim 2, characterized in that: The stop member has a plug-in post in the middle and an expansion ring at the end of the plug-in post. The expansion ring has multiple openings and the plug-in post is inserted into the plug-in hole and can slide along the plug-in hole.

8. The wiping head 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°.

9. The wiping head replacement structure according to claim 1, characterized in that: The limiting shoulder without the elastic pin is a tapered limiting shoulder. The bottom shape of the through hole matches the shape of the convex angle. One side of the tapered limiting shoulder is adjacent to the through hole and the other side is connected to the connecting plate.

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