An adaptive flat sanding device

Abstract

The application relates to an adaptive plane polishing device, which comprises a rack, an adaptive mechanism and a polishing mechanism. The adaptive mechanism comprises a mounting base, a connecting base, a top-pulling assembly, two groups of front elastic assemblies and two groups of rear elastic assemblies. The polishing mechanism is detachably installed on the connecting base. The two groups of front elastic assemblies are movably connected to opposite sides of the connecting base. The two groups of rear elastic assemblies are movably connected to the end of the connecting base. One end of the top-pulling assembly is fixed to the connecting base, and the other end of the top-pulling assembly penetrates through the mounting base and is movably connected to the mounting base through a top joint spherical joint. The polishing mechanism is detachably installed on the connecting base. The polishing mechanism can be independently used or combined with the adaptive mechanism for use, so that the polishing device can be used in different application scenarios. The adaptive mechanism is an active posture adjusting part of the polishing mechanism and the rack, so that the polishing mechanism can adapt to the ground changes with large undulating height, and the polishing flatness and polishing efficiency of the floor are improved.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, and more particularly to an adaptive planar grinding device. Background Technology

[0002] Surface grinding devices are used for floor grinding and leveling, effectively grinding marble, concrete surfaces, epoxy mortar layers, terrazzo surfaces, and other floor surfaces requiring grinding. Existing grinding devices include a frame, a drive motor mounted on the frame, and a grinding disc mechanism and protective cover mechanism mounted on the output end of the drive motor. The drive motor is fixedly connected to the end of the frame and the two are not detachable. The weight of the motor acts on the grinding disc mechanism, achieving gravity pressure to grind the floor surface, thus maintaining a constant amount of grinding. For example, publication number CN212886637U discloses a floor grinder with a rotatable and lifting head grinding disc. And publication number CN120715801A discloses a grinding machine and a floor grinding construction method.

[0003] The aforementioned motor and frame are fixedly connected, and the surface grinding device can only grind the ground, resulting in a single grinding function. Furthermore, the surface grinding device grinds at a flat angle, and the grinding disc mechanism adapts to changes in ground height with large undulations, which presents a technical problem of poor adaptability to ground grinding conditions, and therefore needs to be improved. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this invention provides an adaptive flat grinding device to solve the technical problems of limited grinding function and poor adaptability to ground grinding conditions.

[0005] According to a first aspect of the present invention, an adaptive plane polishing apparatus is provided, including a frame, an adaptive mechanism and a polishing mechanism, wherein the polishing mechanism is used to polish a plane; The adaptive mechanism includes a mounting base, a connecting base, a top-pull assembly, two sets of front elastic components, and two sets of rear elastic components. The mounting base is fixed to the frame, and the grinding mechanism is detachably mounted on the connecting base. The two sets of front elastic components are movably connected to opposite sides of the connecting base, and the two sets of rear elastic components are movably connected to the ends of the connecting base. One end of the top-pull assembly is fixed to the connecting base, and the other end of the top-pull assembly extends out of the mounting base and is movably connected to the mounting base through a top joint ball joint. The top-pull assembly is located within the area enclosed by the two sets of front elastic components and the two sets of rear elastic components. The front elastic component includes a front joint ball joint, a front pull rod, a front compression spring, and an adjusting sleeve. The front joint ball joint is connected to the side of the connecting seat. The front pull rod is installed on the front joint ball joint and extends out of the mounting seat. The front compression spring elastically pushes against the front joint ball joint and the mounting seat. The adjusting sleeve is connected to the front pull rod and abuts against the mounting seat to adjust the preload of the front compression spring.

[0006] In one embodiment, the rear elastic component includes a rear joint ball joint, a rear pull rod, and a rear compression spring. The rear joint ball joint is connected to the end face of the connecting seat, the rear pull rod is mounted on the rear joint ball joint and extends out of the mounting seat, and the rear compression spring elastically pushes against the rear joint ball joint and the mounting seat.

[0007] In one embodiment, the diameter of the rear tie rod is smaller than the diameter of the front tie rod.

[0008] In one embodiment, the centerline connecting the two sets of front elastic components and the two sets of rear elastic components forms a trapezoid.

[0009] In one embodiment, the connecting seat includes an adjusting column, a top wall, and mounting walls bent from both sides of the top wall. The opposite sides of the grinding mechanism are assembled to the mounting walls by fasteners. The two ends of the adjusting column abut against the top wall and the top surface of the grinding mechanism, respectively. The fasteners pass through the top wall and the adjusting column and are locked to the grinding mechanism. The rotating shaft of the grinding mechanism is located within the triangular projection area formed by the connection between the grinding mechanism and the connecting seat.

[0010] In one embodiment, the polishing mechanism includes a housing assembly, a control assembly, a motor assembly, and a protective cover assembly mounted on the housing assembly. The housing assembly and the connecting seat are detachably connected. The output shaft of the motor assembly extends into the cover space of the protective cover assembly. The output shaft is used to connect to the polishing disc assembly. The adaptive flat polishing device also includes a dust collection assembly connected to the protective cover assembly.

[0011] In one embodiment, the protective cover assembly includes a fixed disk, a rotating disk, and a dustproof brush. The fixed disk is fixedly connected to the housing assembly, and the rotating disk is rotatable around the fixed disk. The edge of the rotating disk is annular and has a mounting groove, and the dustproof brush is installed in the mounting groove.

[0012] In one embodiment, the rotating disk includes a plurality of elastic members spaced apart from the mounting groove, the elastic members elastically pushing against the dustproof brush.

[0013] In one embodiment, the rotating disk includes a main housing and a side housing detachably connected to the main housing. The main housing is provided with an annular flange, and the fixed disk is rotatably connected to the annular flange. The distance between the rotation axis of the main housing and the mounting surface of the side housing is smaller than the rotation radius of the grinding disc assembly.

[0014] In one embodiment, the adaptive surface grinding device further includes a counterweight assembly that is detachably mounted on the mounting base or frame.

[0015] The technical solutions provided by the embodiments of the present invention can include the following beneficial effects: the grinding mechanism is detachably installed on the connecting seat, and the grinding mechanism can be used independently or in combination with the adaptive mechanism to realize the functional use of the grinding device in different application scenarios. The adaptive mechanism, as the movable posture adjustment part of the grinding mechanism and the frame, enables the grinding mechanism to adapt to changes in ground with large undulations, improving the flatness and efficiency of floor grinding. Two sets of front elastic components and two sets of rear elastic components can adjust and pre-press the posture of the connecting seat relative to the mounting seat. The front joint ball joint can achieve universal rotation, allowing the grinding mechanism to adapt to changes in ground and sway without affecting the vibration of the entire grinding device, resulting in good grinding effect. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] Figure 1 This is a schematic diagram of the structure of an adaptive planar grinding device according to an embodiment.

[0018] Figure 2 This is an exploded structural schematic diagram of an adaptive planar grinding apparatus according to an embodiment.

[0019] Figure 3 This is a schematic diagram illustrating the independent use of the polishing mechanism according to one embodiment.

[0020] Figure 4 This is a schematic diagram of the bottom of the polishing mechanism according to one embodiment.

[0021] Figure 5 This is a schematic diagram illustrating an adaptive mechanism according to one embodiment.

[0022] Figure 6 This is an exploded view of an adaptive mechanism according to one embodiment.

[0023] Figure 7 This is a schematic diagram illustrating the structure of a counterweight assembly mounted on an adaptive mechanism according to an embodiment.

[0024] Figure 8 This is a structural schematic diagram illustrating an adaptive mechanism for folding armrest components according to an embodiment.

[0025] In the figure, frame 10; frame body 11; second mounting position 111; roller assembly 12; handrail assembly 13; connecting frame 131; handrail frame 132; balance frame 14; adaptive mechanism 20; mounting base 21; support wall 211; assembly wall 212; clearance hole 213; support boss 214; connecting base 22; top wall 221; mounting wall 222; front elastic component 23; front joint ball joint 231; front compression spring 232; front pull rod 233; adjusting sleeve 234; rear elastic component 24; rear joint ball joint 241; rear compression spring 242; rear pull rod 243; top pull assembly 25; top pull rod 251; top joint ball joint 252; adjusting column 26; grinding mechanism 30; housing assembly 31; first lock 311; third lock point 312; protective cover assembly 32; fixed plate 321; rotating plate 322; main housing 3221; side housing 3222; mounting groove 3223; cover space 3224; dust brush 323; guide wheel 324; grinding disc assembly 33; dust suction assembly 40; counterweight assembly 50. Detailed Implementation

[0026] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images, and should not be construed as limiting the invention. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art.

[0027] like Figures 1 to 4 As shown, this invention provides an adaptive surface sanding device, which includes a frame 10, an adaptive mechanism 20, and a sanding mechanism 30. The adaptive mechanism 20 is installed at the front end of the frame 10 and can be independently connected to and detached from the sanding mechanism 30, which is used for sanding surfaces. The sanding mechanism 30 operates as an independent sanding mechanism to perform sanding operations. For example, the main sanding part of the sanding mechanism 30 is similar to the structure of an angle grinder. When the sanding mechanism 30 is assembled with the adaptive mechanism 20, a roller assembly 12 is installed at the rear end of the frame 10. The operator can push the handle assembly 13 of the frame 10 to move the sanding mechanism 30 for sanding and swinging. When the sanding mechanism 30 operates independently, the operator can hand-grind the floor or wall, achieving multiple uses with one machine.

[0028] The adaptive mechanism 20 automatically adjusts the grinding posture and angle of the grinding mechanism 30 according to changes in ground undulations, thereby gradually grinding the uneven parts of the floor to a preset plane height and angle. The adaptive mechanism 20 includes a mounting base 21, a connecting base 22, a top-pull assembly 25, two sets of front elastic components 23, and two sets of rear elastic components 24. The mounting base 21 and the connecting base 22 are arranged opposite each other, with the mounting base 21 located above the connecting base 22. The top-pull assembly 25, the two sets of front elastic components 23, and the two sets of rear elastic components 24 are movably connected to the mounting base 21 and the connecting base 22, respectively.

[0029] like Figure 2 , Figure 5 and Figure 6 As shown, the adaptive mechanism 20, through the synergistic effect of the top-pull assembly 25 and four sets of elastic components, utilizes the multi-angle movement characteristics of the joint ball joint and the elastic adjustment function of the compression spring to enable the grinding mechanism 30 to flexibly adapt to changes in ground undulations, effectively solving the problem of poor adaptability of existing devices to uneven ground, and ensuring the flatness and consistency of the grinding surface.

[0030] Mounting base 21 includes a support wall 211 and mounting walls 212 located on both sides of the support wall 211. The mounting walls 212 are fixed to both sides of the frame 10 by fasteners. The grinding mechanism 30 is detachably mounted on the connecting base 22, which is located between the support wall 211 and the grinding mechanism 30.

[0031] The connecting seat 22 and the mounting seat 21 are movably connected by a pull-up assembly 25, two sets of front elastic components 23, and two sets of rear elastic components 24. The two sets of front elastic components 23 are movably connected to opposite sides of the connecting seat 22, and the two sets of rear elastic components 24 are movably connected to the ends of the connecting seat 22. The center line connecting the two sets of front elastic components 23 and the two sets of rear elastic components 24 approximates a quadrilateral structure; for example, the quadrilateral structure can be rectangular or trapezoidal.

[0032] Preferably, the centerlines of the two sets of front elastic components 23 and the two sets of rear elastic components 24 are connected in a trapezoidal shape. This trapezoidal layout allows the four sets of elastic components to form a stable support structure, evenly distributing the load on the connecting seat 22 and the grinding mechanism 30. At the same time, the trapezoidal structure provides the connecting seat 22 with multi-directional adjustment margin, ensuring that the grinding mechanism 30 can rotate flexibly relative to the mounting base 21 when the ground is uneven, and can automatically reset after the offset force disappears.

[0033] In one embodiment, the front elastic component 23 includes a front joint ball joint 231, a front pull rod 233, a front compression spring 232, and an adjusting sleeve 234. The front joint ball joint 231 has a connecting portion and a movable ball portion. The movable ball portion can rotate in any direction relative to the connecting portion within a preset range, and the movable ball portion is provided with a through mounting hole. The connecting portion of the front joint ball joint 231 is connected to the side of the connecting seat 22. One end of the front pull rod 233 is installed in the mounting hole of the movable ball portion, and the other end passes through the mounting seat 21 and is connected to the adjusting sleeve 234.

[0034] The two ends of the front compression spring 232 elastically push against the front joint ball joint 231 and the mounting seat 21, respectively. Since the mounting seat 21 is fixed in position, the front compression spring 232 applies an elastic preload to the connecting seat 22. The adjusting sleeve 234 is connected to the front pull rod 233 and abuts against the mounting seat 21. When the adjusting sleeve 234 rotates helically to abut against the mounting seat 21, the length of the front pull rod 233 can be adjusted axially to adjust the preload of the front compression spring 232 acting on the connecting seat 22. The adjusting sleeve 234 in the front elastic component 23 can precisely adjust the preload of the front compression spring 232, achieving fine control of the grinding pressure.

[0035] The front elastic component 23 is located at the front end of the adaptive mechanism 20, which is the forward direction of the grinding device. The two sets of front elastic components 23 are respectively connected to both sides of the connecting seat 22, which can expand the swing range of the front end of the connecting seat 22 and also expand the swing point size of the connecting seat 22.

[0036] The rear elastic component 24 is located at the rear end of the adaptive mechanism 20. The center distance between the two rear elastic components 24 is smaller than the center distance between the two front elastic components 23, forming a trapezoidal layout structure. The two rear elastic components 24 can provide floating support for the rear end of the connecting seat 22 and also provide a support base for the swing of the front elastic component 23, playing a floating "rudder" function, which is beneficial to the overall adaptive adjustment of the adaptive mechanism 20.

[0037] The rear elastic component 24 includes a rear joint ball joint 241, a rear pull rod 243, and a rear compression spring 242. The rear joint ball joint 241 is connected to the end face of the connecting seat 22. The rear pull rod 243 is installed on the rear joint ball joint 241 and extends out of the mounting seat 21. The rear compression spring 242 elastically pushes against the rear joint ball joint 241 and the mounting seat 21.

[0038] The rear elastic component 24 and the front elastic component 23 have basically the same structure, the difference being that the rear elastic component 24 does not need to be equipped with the adjusting sleeve 234, and the automatic balance of the adaptive mechanism 20 is achieved through the top-pull component 25 and the front elastic component 23. Optionally, the rear elastic component 24 can also be equipped with the adjusting sleeve 234 structure.

[0039] In this embodiment, both the front elastic component 23 and the rear elastic component 24 are connected to the connecting seat 22 via articulated ball joints. Accordingly, the movable parts of the front elastic component 23 and the rear elastic component 24 are close to the connecting seat 22.

[0040] like Figure 2 , Figures 5 to 7 As shown, the top-pull assembly 25 further includes a top-pull rod 251 and a top joint ball joint 252. One end of the top-pull rod 251 is fixed to the connecting seat 22, and the other end of the top-pull rod 251 extends out of the mounting seat 21. The top-pull rod 251 is movably connected to the mounting seat 21 through the top joint ball joint 252. The top-pull assembly 25 is located within the area enclosed by two sets of front elastic components 23 and two sets of rear elastic components 24. The mounting seat 21 has a through clearance hole 213 at the support wall 211, and the top-pull assembly 25 extends out along the clearance hole 213. A support boss 214 is provided on the upper surface of the support wall 211, and the top joint ball joint 252 is connected to the support boss 214 so that the movable part of the top-pull assembly 25 is located above the mounting seat 21.

[0041] The top-pull assembly 25, two sets of front elastic components 23 and two sets of rear elastic components 24 are movably connected. The top-pull assembly 25 forms the upper middle part, which allows the mounting base 21 to swing or twist around the top joint ball joint 252 as a whole. It has a high degree of freedom and can achieve automatic balance.

[0042] Preferably, the first distance is smaller than the second distance. The first distance is the plane where the top-pull assembly 25 and the two sets of front elastic components 23 are located, and the second distance is the plane where the top-pull assembly 25 and the two sets of rear elastic components 24 are located. The first distance being smaller than the second distance allows the front end of the adaptive mechanism 20 to have a larger swing angle and a smaller swing amplitude.

[0043] Preferably, the diameter of the rear tie rod 243 is smaller than that of the front tie rod 233. Based on the difference in force distribution between the front elastic component 23 and the rear elastic component 24, the front elastic component 23 needs to bear a greater supporting and adjusting load. Increasing the diameter of the front tie rod 233 improves its structural strength. Using a smaller diameter for the rear tie rod 243 allows for lightweight design while maintaining functionality, optimizing the overall structural force balance. Optionally, the diameter of the rear tie rod 243 is set to 8mm, and the diameter of the front tie rod 233 is set to 12mm, adapting to the force requirements of both through differentiated diameter design. Simultaneously, the line connecting the centerlines of the two sets of front elastic components 23 and the two sets of rear elastic components 24 forms an isosceles trapezoid, ensuring a uniform distribution of supporting force.

[0044] In one embodiment, the connecting seat 22 includes an adjusting column 26, a top wall 221, and mounting walls 222 bent from both sides of the top wall 221. The top wall 221 and the mounting walls 222 on both sides form an approximately U-shaped structure, creating a defined space within the connecting seat 22 for mounting the grinding mechanism 30. The opposite sides of the grinding mechanism 30 are fitted to the mounting walls 222 by fasteners, forming a first locking point 311 and a second locking point. The two ends of the adjusting column 26 abut against the top surface of the top wall 221 and the top surface of the grinding mechanism 30, respectively. Fasteners pass through the top wall 221 and the adjusting column 26 and lock onto the grinding mechanism 30, forming a third locking point 312. The adjusting column 26 can adjust the installation height between the grinding mechanism 30 and the connecting seat 22, adapting to the installation requirements of grinding mechanisms 30 of different specifications, and ensuring that the impact force received by the grinding mechanism 30 is transmitted to the connecting seat 22 through the adjusting column 26, resulting in good direct force transmission.

[0045] The first locking point 311, the second locking point, and the third locking point 312 constitute a three-point locking system for the grinding mechanism 30. This not only facilitates the quick assembly and disassembly of the grinding mechanism 30 but also helps to stabilize its installation position. The line connecting the first locking point 311, the second locking point, and the third locking point 312 forms an isosceles triangle in three-dimensional space. The grinding mechanism 30 has a rotating shaft that drives the grinding disc assembly 33. This rotating shaft is located within the triangular projection area formed by the connection between the grinding mechanism 30 and the connecting seat 22. The triangular projection area is the projection of the line connecting the first locking point 311, the second locking point, and the third locking point 312 onto the grinding plane. The rotating shaft of the grinding mechanism 30 is placed within the triangular projection area. The stability of the triangular structure ensures the structural stability of the grinding mechanism 30 during high-speed operation, reducing the impact of vibration on grinding accuracy. Furthermore, the adaptive mechanism 20 enables adaptive torsion and attitude adjustment. The trapezoidal layout of the elastic components and the triangular positioning design of the grinding mechanism 30 ensure the stability of the device during high-speed operation.

[0046] like Figure 3 and Figure 5 As shown, the grinding mechanism 30 can operate independently or be installed on the connecting base 22 to form a combined operation. The grinding mechanism 30 includes a housing assembly 31, a control assembly, a motor assembly, and a protective cover assembly 32 installed on the housing assembly 31. The control assembly and the motor assembly are electrically connected to control the operation of the motor assembly.

[0047] The housing assembly 31 and the connecting base 22 are detachably connected. The housing assembly 31 can adapt to the installation space of the mounting base 21 and is stably connected to the mounting base 21 via a first locking point 311, a second locking point, and a third locking point 312. The first locking point 311, the second locking point, and the third locking point 312 are not on the same plane. More preferably, the center lines of the first locking point 311 and the second locking point are coaxially arranged, and the center line of the third locking point 312 is perpendicular to the center line of the first locking point 311, thus forming a three-dimensional locking mechanism.

[0048] The output shaft of the motor assembly extends into the housing space 3224 of the protective cover assembly 32, and the output shaft is used to connect the grinding disc assembly 33. The protective cover assembly 32 is a housing structure, and the protective cover assembly 32 is installed on the housing assembly 31. During the grinding process, the protective cover assembly 32 can collect the dust ground by the grinding disc assembly 33, prevent it from being crushed and scattered, and improve the grinding construction environment.

[0049] Furthermore, the adaptive surface grinding device also includes a dust collection component 40 connected to the protective cover assembly 32. The dust collection component 40 creates a negative pressure environment within the cover space 3224, which can absorb and collect dust. The dust collection component 40 is connected to the protective cover assembly 32 via a suction pipe. Therefore, by removing the grinding mechanism 30 from the connecting seat 22, the grinding mechanism 30 can perform the function of an angle grinder and also cooperate with the dust collection component 40 to perform dust collection, greatly improving the versatility of application scenarios. The dust collection component 40 uses an industrial vacuum cleaner, which can collect grinding dust in real time. The industrial vacuum cleaner can be installed on the frame 10 and moves with the frame 10.

[0050] Preferably, the frame 10 further includes a balance frame 14, which has a balance cavity. The housing assembly 31 is inserted into the balance cavity of the balance frame 14 to be constrained by the balance frame 14, thus forming a secondary auxiliary support.

[0051] In one embodiment, the protective cover assembly 32 includes a fixed disk 321, a rotating disk 322, and a dustproof brush 323. The fixed disk 321 is fixedly connected to the housing assembly 31. The rotating disk 322 can rotate around the fixed disk 321. The edge of the rotating disk 322 is annular and has a mounting groove 3223. The dustproof brush 323 is installed in the mounting groove 3223. The rotating disk 322 can rotate with the construction surface. In particular, when the rotating disk 322 rotates, it can be fitted to the corners of walls for grinding. The dustproof brush 323 always keeps in contact with the ground, improving the dust blocking effect and preventing dust from overflowing. At the same time, the rotatable structure allows the dustproof brush 323 to adapt to the undulations of the ground, ensuring the continuity of the protective effect.

[0052] Furthermore, the rotating disk 322 includes a main housing 3221 and a side housing 3222 detachably connected to the main housing 3221. The side housing 3222 and the main housing 3221 have an arc-shaped structure, and the combined surface of the main housing 3221 and the side housing 3222 is a plane. When the side housing 3222 is removed, the plane of the main housing 3221 can fit against the corner of the wall, allowing the grinding disc assembly 33 to grind the corner. The main housing 3221 is provided with an annular flange, and the fixed disk 321 is rotatably connected to the annular flange. The distance from the rotation axis of the main housing 3221 to the mounting surface of the side housing 3222 is smaller than the rotation radius of the grinding disc assembly 33. The annular flange structure ensures smooth rotation between the rotating disk 322 and the fixed disk 321, and ensures that the rotating disk remains flush against the corner of the wall as the adaptive flat grinding device rotates, avoiding the technical problem of workers squatting on the ground during operation.

[0053] Furthermore, guide wheels 324 are installed on both sides of the main housing 3221. The guide wheels 324 can protrude slightly from the assembly surface to form a rolling guide.

[0054] Meanwhile, the rotating disk 322, by limiting the distance between the rotation axis of the main housing 3221 and the mounting surface of the side housing 3222, ensures that the protective cover assembly 32 can completely cover the working area of ​​the grinding disc assembly 33, improving protection and dust collection effects. The coordinated design of the protective cover assembly 32 and the dust collection assembly 40 effectively reduces the diffusion of grinding dust, improving the working environment and preventing dust from affecting grinding accuracy.

[0055] In one embodiment, the rotating disk 322 includes a plurality of elastic members spaced apart in the mounting groove 3223, which elastically push against the dust brush 323. The elastic members provide continuous elastic pressure to the dust brush 323, ensuring that the dust brush 323 can still fit tightly against the ground when the ground is uneven, avoiding dust leakage due to gaps, and at the same time buffering the rigid collision between the dust brush 323 and the ground, extending the service life of the dust brush 323.

[0056] like Figure 1 , Figure 7 and Figure 8 As shown, to further improve the grinding effect of the adaptive surface grinding device, the counterweight component 50 can be adjusted to different installation positions according to the depth and amount of grinding. The adaptive surface grinding device also includes a counterweight component 50, which can be detachably installed on the mounting base 21 or the frame 10. The grinding mechanism 30 and the connecting base 22 are detachably connected. With the flexible adjustment of the counterweight component 50, the device can not only be used for grinding various floor materials, but also different types of grinding mechanisms 30 can be replaced as needed, expanding the application scenarios of the device.

[0057] Optionally, the counterweight assembly 50 can be installed in different positions to create different centers of gravity. The frame 10 includes a frame body 11, a handrail assembly 13 and a roller assembly 12 installed at one end of the frame body 11, and an adaptive mechanism 20 installed at the other end of the frame body 11. A connecting portion is provided on the mounting base 21 for connecting the counterweight assembly 50. Accordingly, the connecting portion, as the first installation position, allows the grinding center of the grinding mechanism 30 to be located within the projection range of the counterweight assembly 50, which is the projection of the counterweight assembly 50 onto the grinding plane. The weight of the counterweight assembly 50 acts entirely on the grinding mechanism 30, increasing the pressure on the grinding mechanism 30 and thus increasing the grinding force of the grinding mechanism 30 on the ground, making it suitable for grinding floors with large grinding volumes.

[0058] The frame 10 also has a second mounting position 111 on the adaptive mechanism 20 and the handrail assembly 13. The counterweight assembly 50 is mounted in the second mounting position 111 so that the counterweight assembly 50 can be moved away from the grinding mechanism 30, while still providing pressure to the grinding mechanism 30. In the second mounting position 111, part of the weight of the counterweight assembly 50 is distributed through the roller assembly 12, thereby reducing the pressure on the grinding mechanism 30 and thus reducing the grinding force of the grinding mechanism 30 on the ground, making it suitable for grinding floors with small grinding amounts.

[0059] The handrail assembly 13 includes a connecting frame 131 and a handrail frame 132 connected to the connecting frame 131. The connecting frame 131 is rotatably connected to the frame 10. The handrail assembly 13 can be folded relative to the frame 10 in the flipped state for easy packaging and transportation. The frame 10 is an integral rigid frame structure to improve the overall structural strength.

[0060] The construction process of the adaptive surface grinding device is as follows: Select a suitable grinding disc assembly 33 according to the hardness of the floor material and install it onto the output shaft of the motor assembly. Adjust the preload of the front compression spring 232 through the adjusting sleeve 234. Install the appropriate number of counterweight assemblies 50 as needed. Start the motor assembly and the dust collection assembly 40. The motor assembly drives the grinding disc assembly 33 to rotate at high speed, and the grinding disc assembly 33 performs grinding operations on the floor.

[0061] When grinding reaches a raised area of ​​the ground, the grinding disc assembly 33 experiences an upward force, which is transmitted through the connecting seat 22 to the front elastic component 23 and the rear elastic component 24. The corresponding front compression spring 232 or rear compression spring 242 is compressed, and the connecting seat 22 rotates around the top joint ball joint 252 of the top pull assembly 25, causing the grinding disc assembly 33 to adaptively rise with the raised area of ​​the ground. When grinding reaches a recessed area of ​​the ground, under the elastic restoring force of the compression spring, the connecting seat 22 rotates in the opposite direction, and the grinding disc assembly 33 adaptively descends with the recessed area, always maintaining contact with the ground to ensure a smooth finish. Throughout the process, the dust brush 323 remains in contact with the ground under the action of the elastic element, effectively collecting dust in conjunction with the dust collection assembly 40, improving the working environment.

[0062] It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed in this invention.

Claims

1. An adaptive planar grinding device, characterized in that, It includes a frame, an adaptive mechanism, and a grinding mechanism, wherein the grinding mechanism is used to grind a flat surface; The adaptive mechanism includes a mounting base, a connecting base, a top-pull assembly, two sets of front elastic components, and two sets of rear elastic components. The mounting base is fixed to the frame, and the grinding mechanism is detachably mounted on the connecting base. The two sets of front elastic components are movably connected to opposite sides of the connecting base, and the two sets of rear elastic components are movably connected to the ends of the connecting base. One end of the top-pull assembly is fixed to the connecting base, and the other end of the top-pull assembly extends out of the mounting base and is movably connected to the mounting base through a top joint ball joint. The top-pull assembly is located within the area enclosed by the two sets of front elastic components and the two sets of rear elastic components. The front elastic component includes a front joint ball joint, a front pull rod, a front compression spring, and an adjusting sleeve. The front joint ball joint is connected to the side of the connecting seat. The front pull rod is installed on the front joint ball joint and extends out of the mounting seat. The front compression spring elastically pushes against the front joint ball joint and the mounting seat. The adjusting sleeve is connected to the front pull rod and abuts against the mounting seat to adjust the preload of the front compression spring. The connecting seat includes an adjusting column, a top wall, and mounting walls bent from both sides of the top wall. The opposite sides of the grinding mechanism are assembled to the mounting walls by fasteners. The two ends of the adjusting column abut against the top wall and the top surface of the grinding mechanism, respectively. The fasteners pass through the top wall and the adjusting column and are locked to the grinding mechanism. The rotating shaft of the grinding mechanism is located in the triangular projection area formed by the connection between the grinding mechanism and the connecting seat. The polishing mechanism includes a housing assembly, a control assembly, a motor assembly, and a protective cover assembly mounted on the housing assembly. The housing assembly and the connecting seat are detachably connected. The output shaft of the motor assembly extends into the cover space of the protective cover assembly. The output shaft is used to connect to the polishing disc assembly. The adaptive flat polishing device also includes a dust collection assembly connected to the protective cover assembly.

2. The adaptive planar grinding device according to claim 1, characterized in that, The rear elastic component includes a rear joint ball joint, a rear pull rod, and a rear compression spring. The rear joint ball joint is connected to the end face of the connecting seat. The rear pull rod is installed on the rear joint ball joint and extends out of the mounting seat. The rear compression spring elastically pushes against the rear joint ball joint and the mounting seat.

3. The adaptive planar grinding device according to claim 2, characterized in that, The diameter of the rear tie rod is smaller than the diameter of the front tie rod.

4. The adaptive planar grinding device according to claim 1, characterized in that, The centerlines of the two sets of front elastic components and the two sets of rear elastic components form a trapezoid.

5. The adaptive planar grinding device according to claim 1, characterized in that, The protective cover assembly includes a fixed disk, a rotating disk, and a dustproof brush. The fixed disk is fixedly connected to the housing assembly. The rotating disk can rotate around the fixed disk. The edge of the rotating disk is annular and has a mounting groove. The dustproof brush is installed in the mounting groove.

6. The adaptive planar grinding device according to claim 5, characterized in that, The rotating disk includes a plurality of elastic elements spaced apart in the mounting groove, the elastic elements elastically pushing against the dustproof brush.

7. The adaptive planar grinding device according to claim 5, characterized in that, The rotating disk includes a main housing and a side housing detachably connected to the main housing. The main housing is provided with an annular flange, and the fixed disk is rotatably connected to the annular flange. The distance between the rotation axis of the main housing and the mounting surface of the side housing is smaller than the rotation radius of the grinding disc assembly.

8. The adaptive planar grinding apparatus according to any one of claims 1 to 7, characterized in that, The adaptive surface grinding device also includes a counterweight assembly, which is detachably mounted on the mounting base or frame.

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