Patent Application
20250041992
The present invention relates to the field of wall sanding, particularly a flatness control structure for a drywall sander machine.
Drywall sanders are tools used as alternatives to traditional manual sanding for wall surfaces or objects. They are primarily electrically driven and commonly referred to as electric drywall sanders. Electric drywall sanders are available in fixed-handle and adjustable-handle types. The fixed-handle type can only be used to sand wall surfaces within arm's reach, while the adjustable-handle type is required for sanding surfaces at greater distances, such as ceilings.
Current drywall sander heads typically consist of a main case, a housing, and a sanding component. The main case houses the motor and features a dust exhaust channel. The housing is connected and communicates with the main case and has bristle sections on its peripheral surface. The sanding component is rotatably mounted on the housing and is driven by the motor. By pressing the bristle sections and the sanding component against the surface to be sanded, the sanding component sands the surface while the bristle sections brush away the residual dust.
However, when the bristle sections come into contact with the sanding surface, deformation occurs, resulting in poor stability of the sanding head. As a result, the housing cannot be firmly fixed to the sanding surface, causing the surface of the sanding disc to be misaligned with the sanding surface and leading to uneven sanding results.
Additionally, since the bristle sections are not securely attached to the sanding surface, the entire drywall sander relies solely on the contact between the sanding disc and the sanding surface, requiring a significant amount of force. This leads to increased effort and poor user comfort, as well as lower sanding efficiency.
Moreover, the bristle sections have multiple gaps between the bristles, allowing sanding dust inside the housing to leak out through these gaps, resulting in significant dust leakage from the drywall sander and greatly impacting the working environment and human health.
Therefore, it is necessary to provide a flatness control structure for a drywall sander machine to address the aforementioned technical issues.
The present invention provides a flatness control structure for a drywall sander machine, which addresses the issue of deformation occurring when the bristle sections come into contact with the sanding surface, resulting in poor stability of the sanding head.
In order to solve the aforementioned technical problems, the present invention provides a flatness control structure for a drywall sander machine, comprising:
Device body: The bottom of the device body is equipped with a rotating device.
Housing: The housing is positioned beneath the device body.
Sanding component: The sanding component is positioned inside the housing and includes a sanding piece. The bottom of the sanding piece is connected to a sanding disc, and the bottom of the sanding disc is connected to sandpaper. A threaded bolt is provided between the sanding piece and the housing.
Fixing component: The fixing component is positioned inside the housing.
Installation component: The installation component is positioned inside the housing
Preferably, the installation component comprises a mounting groove, wherein the internal part of the mounting groove is respectively equipped with a main connecting seat and a mounting seat, and one side of the mounting seat is equipped with a spring.
Preferably, the bottom of the housing is adhesively attached with a wear-resistant strip, and the surface of the wear-resistant strip is provided with multiple ventilation slots
Preferably, the fixing component comprises a mounting block, wherein the mounting block is positioned on the surface opposite the wear-resistant strip and the housing, and the surface of the wear-resistant strip is provided with multiple connecting holes. The wear-resistant strip is equipped with auxiliary connecting seats corresponding to the connecting holes, and the main connecting seat and the auxiliary connecting seat are connected by screws.
Preferably, the wear-resistant strip is provided with multiple accommodating holes, and each accommodating hole is equipped with a rolling element.
Preferably, the rotating device comprises a rotary seat, wherein the interior of the rotary seat is equipped with a shaft, and bearings are positioned on both sides of the shaft. A compression spring is positioned between the shaft and the bearings.
Preferably, the surface of the device body is encased with a main case.
Preferably, the surface of the mounting block is provided with a slot.
Preferably, the surface of the sanding component is equipped with an extrusion component, which comprises a groove. A rotating shaft is pivotally connected between the two sides of the inner wall of the groove, and one side of the rotating shaft is connected to an extrusion plate. The bottom of the extrusion plate is connected to a connecting block.
Preferably, one end of the extrusion plate is equipped with a fixing piece, and one side of the inner wall of the groove is provided with fixing holes that are compatible with the fixing piece.
Compared to the related art, the flatness control structure for a drywall sander machine provided by the present invention offers the following advantageous effects:
The present invention provides a flatness control structure for a drywall sander machine. By replacing the bristle sections with wear-resistant strips on the housing, deformation is minimized when the wear-resistant strips come into contact with the sanding surface. This allows the drywall sander to be firmly fixed to the sanding surface when applying force, resulting in improved stability and ensuring that the sanding component remains parallel to the sanding surface. As a result, the flatness of the sanding surface is enhanced.
The contact between the wear-resistant strips and the sanding surface generates friction. Due to the lack of deformation in the wear-resistant strips, a lower amount of force is required to securely hold the drywall sander against the wall surface. This provides a higher level of user comfort and increases the efficiency of the sanding process.
The wear-resistant strips adhere to the sanding surface, and apart from ventilation slots for airflow, there are no gaps or openings between the wear-resistant strips and the housing. This ensures excellent sealing of the housing, significantly reducing the occurrence of dust leakage. It improves the cleanliness of the working environment and does not compromise human health.
For purposes of promoting an understanding of the principles of the invention, reference will now be made to two embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention, as illustrated therein, being contemplated as would normally occur to one skilled in the art to which the invention relates.
The flatness control structure for a drywall sander machine comprises, as shown in
Device body 7, with a rotating device 5 arranged at the bottom of the device body 7.
Housing 10, positioned below the device body 7.
Sanding component 3, located inside housing 10, comprises sanding piece 31. The bottom of sanding piece 31 is connected to sanding disc 32, and the bottom of sanding disc 32 is connected to sandpaper 33. A threaded bolt 6 is positioned between sanding piece 31 and housing 10.
Fixing component 2, situated inside housing 10.
Installation component 1, positioned inside housing 10.
The fixing component 2 comprises a mounting block 22, which is positioned on the surface of the wear-resistant strip 20 opposite housing 10. The surface of the wear-resistant strip 20 is provided with multiple connection holes 23, and corresponding auxiliary connecting seats 24 are set on the wear-resistant strip 20. The main connecting seat 12 and the auxiliary connecting seat 24 are connected by screws 25.
Multiple accommodating holes 26 are provided on the wear-resistant strip 20, and each accommodating hole 26 is internally equipped with a rolling element 27.
The rotating device 5 includes a rotating seat 50, inside which a shaft 53 is positioned. Bearings 51 are set on both sides of shaft 53, and a compression spring 52 is placed between shaft 53 and bearings 51.
The surface of the device body 7 is covered with a main case 40.
The surface of the mounting block 22 is provided with slot 221.
It is primarily used in an electric drywall sander and includes the structure of housing 10, wear-resistant strip 20, ventilation slots 21, and sanding piece 31.
During operation, the sander is held, and sanding piece 31 is applied to the surface to be sanded with a certain amount of force. Under the reactive force from the sanding surface, sanding piece 31 moves axially and stays in the same plane as the wear-resistant strip 20, maintaining contact with the sanding surface. When sanding piece 31 rotates, a low-pressure state is created inside housing 10, and external air enters housing 10 through ventilation slots 21. The dust inside the housing 10 is transported to the main case 40 and discharged from the sander.
In the entire structure, wear-resistant strip 20 is used on housing 10 instead of the traditional bristle sections, preventing deformation and maintaining a relatively fixed contact between the sander and the sanding surface. The sanding piece 31 remains parallel to the sanding surface, resulting in better sanding effects. The wear-resistant strip 20 separates the inside and outside of the housing 10, effectively preventing dust leakage during the operation of the sander, significantly improving the working environment.
It is worth mentioning that the wear-resistant strip 20 acts as a seal, and the ventilation slots 21 allow stable and continuous air entry into the housing 10, achieving the purpose of dust removal. The direction of airflow inside ventilation slot 21 is from the outside to the inside, thereby avoiding the discharge of dust from housing 10.
Based on the above structure, the present invention further improves and refines the aforementioned structure.
As shown in
In the absence of installing sanding paper 33, the surface of the sanding disc 32 remains flush with the surface of the wear-resistant strip 20. This flush state provides a standard for the installation of sanding paper 33. Once the sanding paper 33 is installed, it comes into contact with the sanding surface with minimal force, achieving a flush alignment between the surface of the sanding paper 33 and the wear-resistant strip 20, resulting in higher comfort during use.
However, when the surface of the sanding disc 32 deviates from the surface of the wear-resistant strip 20, either protruding above or sinking below it, it fails to provide a standard for the installation of the sanding paper 33. After installation, when the sanding disc 32 is not under force, the sanding paper 33 may align perfectly with the wear-resistant strip 20 or be slightly above it. These situations can prevent the sanding paper 33 from being in close contact with the sanding surface, requiring greater force to achieve a flush alignment with the wear-resistant strip 20.
Preferably, the height difference between the surface of the sanding paper 33 and the surface of the wear-resistant strip 20 is within the range of 0.02 inches to 0.06 inches. Different models of sanding paper 33 have varying thicknesses. When different thicknesses of sanding paper 33 are used, the required axial movement distance of the sanding disc 32 also varies during normal operation. Therefore, it is necessary to adjust the force applied, which can result in inflexibility and inconsistent comfort. By setting the height difference between the surface of the sanding paper 33 and the surface of the wear-resistant strip 20 to be within the range of 0.02 inches to 0.06 inches, the same force can be applied when installing different models of sanding paper 33. Additionally, when installing sanding paper 33 of different thicknesses, the different height differences caused by varying thicknesses can be adjusted by changing the distance between shaft 53 and the sanding disc 32. In other words, before using different thicknesses of sanding paper 33, the distance between the shaft 53 and the sanding disc 32 can be adjusted to ensure that the height difference between the surface of the sanding paper 33 and the surface of the wear-resistant strip 20 falls within the range of 0.02 inches to 0.06 inches. This range of 0.02 inches to 0.06 inches is the most suitable distance for applying force. Of course, the height difference between the surface of the sanding paper 33 and the surface of the wear-resistant strip 20 is not limited to the aforementioned range.
As shown in
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As shown in
The connection of the main connecting seat 12 and the auxiliary connecting seat 24 with screws 25 achieves the axially fixed connection between the wear-resistant strip 20 and the housing 10. The wear-resistant strip 20 can be conveniently assembled and disassembled from the housing 10, and the screws 25 are located inside the connection holes 23 without protruding from the surface of the wear-resistant strip 20, avoiding contact with the sanding surface and preventing damage to the sanding surface.
As shown in
As shown in
As shown in
The force of the springs 14 keeps the rolling elements 27 inside the accommodating holes 26 and against the wear-resistant strip 20, ensuring that the rolling elements 27 are always in contact with the sanding surface, allowing the wear-resistant strip 20 to move flexibly on the sanding surface. The springs 14 are installed in the mounting seat 13, providing stability and support, preventing movement and deformation.
The flatness control structure for a drywall sander machine provided by the present invention has the following beneficial effects compared to the related art:
By replacing the bristle sections with a wear-resistant strip 20 on the housing 10, the wear-resistant strip 20 has minimal deformation when in contact with the sanding surface. When force is applied, the sander can be effectively secured to the sanding surface, resulting in improved stability of the entire sander. The sanding piece 31 remains parallel to the sanding surface, enhancing the flatness of the sanding surface.
After the wear-resistant strip 20 comes into contact with the sanding surface, it generates a certain amount of friction. Due to the minimal deformation of the wear-resistant strip 20, a small amount of force is sufficient to secure the sander between wall surfaces, providing higher comfort during use and achieving high sanding efficiency.
The wear-resistant strip 20 adheres to the sanding surface, and except for the ventilation slots 21 for air intake, the rest of the contact area between the wear-resistant strip 20 and the sanding surface completely separates the housing 10 from the external environment without any gaps. The seal of housing 10 is effective, greatly reducing the occurrence of dust leakage and improving the cleanliness of the working environment without compromising human health.
Referring to
Specifically, the difference in the flatness control structure for a drywall sander machine provided in the second embodiment of this application is that the surface of sanding piece 31 is equipped with an extrusion component 8. The extrusion component 8 includes a groove 81, and a rotating rod 82 is rotationally connected between the two sides of the inner wall of the groove 81 through a rotating shaft. One side of the rotating rod 82 is connected to an extrusion plate 83, and the bottom of the extrusion plate 83 is connected to a connecting block 84.
One end of the extrusion plate 83 is equipped with a fixing element 85, and one side of the inner wall of the groove 81 is provided with a fixing hole 86 that is compatible with fixing element 85.
The fixing element 85 can secure the extrusion plate 83 inside the groove 81.
The operation principle of the flatness control structure for a drywall sander machine provided by the present invention is as follows:
The operation principle of the smoothness control structure for a wall sander provided by the present invention is as follows:
During operation, after placing sanding paper 33 at the bottom of sanding piece 31, one side of sandpaper 33 is placed inside groove 81. Once operation sandpaper 33 is properly positioned, the extrusion plate 83 with the connecting block 84 is rotated under the action of the rotating rod 82 until it comes into contact with the surface of sandpaper 33. Then, fixing element 85 inside the extrusion plate 83 is connected to fixing hole 86 on one side of the inner wall of groove 81.
Compared to the related art, the flatness control structure for a drywall sander machine provided by the present invention has the following beneficial effects:
The presence of extrusion component 8 on the surface of sanding piece 31 facilitates the fixation and removal of sandpaper 33.
The above description is merely an embodiment of the present invention and does not limit the scope of the invention. Any equivalent structure or equivalent transformation of processes made based on the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also considered to be within the scope of protection of the present invention.
