Self-adaptive plane grinding device

Abstract

The invention relates to a self-adaptive plane grinding device. The self-adaptive plane grinding device comprises a rack, a self-adaptive mechanism and a grinding mechanism. The self-adaptive mechanism comprises a mounting seat, a connecting seat, a jacking and pulling assembly, two front elastic assemblies and two rear elastic assemblies, the grinding mechanism is detachably mounted on the connecting seat, the two front elastic assemblies are movably connected to the two opposite sides of the connecting seat, the two rear elastic assemblies are movably connected to the end of the connecting seat, one end of the jacking and pulling assembly is fixed to the connecting seat, and the other end of the jacking and pulling assembly is fixed to the connecting seat. And the other end of the jacking and pulling assembly penetrates out of the mounting seat and is movably connected with the mounting seat through a jacking joint spherical joint. And the grinding mechanism is detachably installed on the connecting base, the grinding mechanism can be independently used and can also be combined with the self-adaptive mechanism for use, and functional use of the grinding device in different application scenes is achieved. And the self-adaptive mechanism serves as a movable posture adjusting part of the grinding mechanism and the rack, so that the grinding mechanism can adapt to ground changes with large fluctuating heights, and the grinding flatness and grinding efficiency of the terrace are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the grinding technical field, and particularly to a self-adaptive plane polishing device. BACKGROUND

[0002] The plane polishing device is used for ground polishing leveling construction, and can effectively polish the ground pavement marble, concrete surface layer, epoxy mortar layer, terrazzo surface and other ground surface that needs to be polished. The existing polishing device includes a rack, a driving motor installed on the rack, a polishing disc mechanism installed on the output end of the driving motor and a protective cover mechanism. The driving motor is fixedly connected with the end of the rack and cannot be detached. The weight of the motor acts on the polishing disc mechanism to realize gravity pressing of the polishing disc mechanism to polish the ground, thereby maintaining a constant polishing amount. For example, the publication No. CN212886637U discloses a ground polishing machine with a rotatable lifting head grinding disc. And the publication No. CN120715801A discloses a grinding machine and ground polishing construction method.

[0003] The above-mentioned motor and rack are fixedly connected, and the plane polishing device can only polish the ground, and the polishing function is single. Moreover, the polishing angle of the plane polishing device is plane polishing, and the polishing disc mechanism is adapted to the ground changes with large fluctuation height, and there is a technical problem of poor adaptability of the polishing ground conditions, and therefore improvement is needed. SUMMARY

[0004] To overcome the problems in the related art, the present application provides a self-adaptive plane polishing device to solve the technical problems of single polishing function and poor adaptability of the polishing ground conditions.

[0005] According to a first aspect of the present application, a self-adaptive plane polishing device is provided, which comprises a rack, a self-adaptive mechanism and a polishing mechanism. The polishing mechanism is used for polishing a plane. The self-adaptive mechanism comprises a mounting seat, a connecting seat, a top pulling assembly, two groups of front elastic assemblies and two groups of rear elastic assemblies. The mounting seat is fixedly connected to the rack, and the polishing mechanism is detachably installed on the connecting seat. Two groups of front elastic assemblies are movably connected to opposite sides of the connecting seat, and two groups of rear elastic assemblies are movably connected to the end of the connecting seat. One end of the top pulling assembly is fixed to the connecting seat, and the other end of the top pulling assembly passes through the mounting seat and is movably connected to the mounting seat through a top joint spherical joint. The top pulling assembly is located in the enclosed area of the two groups of front elastic assemblies and the two groups of rear elastic assemblies. The front elastic assembly comprises a front knuckle ball joint, a front pull rod, a front compression spring and an adjusting sleeve. The front knuckle ball joint is connected to the side of the connecting seat. The front pull rod is installed on the front knuckle ball joint and penetrates through the mounting seat. The front compression spring elastically pushes the front knuckle 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 pre-pressing force of the front compression spring.

[0006] In an embodiment, the rear elastic assembly comprises a rear knuckle ball joint, a rear pull rod and a rear compression spring. The rear knuckle ball joint is connected to the end face of the connecting seat. The rear pull rod is installed on the rear knuckle ball joint and penetrates through the mounting seat. The rear compression spring elastically pushes the rear knuckle ball joint and the mounting seat.

[0007] In an embodiment, the diameter of the rear pull rod is smaller than that of the front pull rod.

[0008] In an embodiment, the center lines of the two groups of front elastic assemblies and the two groups of rear elastic assemblies are connected to form a trapezoid.

[0009] In an embodiment, the connecting seat comprises an adjusting column, a top wall and mounting walls bent from both sides of the top wall. The opposite sides of the polishing 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 polishing mechanism respectively. The fasteners are locked to the polishing mechanism after penetrating through the top wall and the adjusting column. The rotation shaft of the polishing mechanism is located in the triangular projection area formed by the connection between the polishing mechanism and the connecting seat.

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

[0011] In an embodiment, the protective cover assembly comprises a fixed disc, a rotating disc and a dust brush. The fixed disc is fixedly connected to the housing assembly. The rotating disc can rotate around the fixed disc. The edge of the rotating disc is annular and is formed with a mounting groove. The dust brush is installed in the mounting groove.

[0012] In an embodiment, the rotating disc comprises a plurality of elastic members installed in the mounting groove at intervals. The elastic members elastically push the dust brush.

[0013] In an embodiment, the rotating disc comprises a main shell and a side shell detachably connected to the main shell, the main shell is provided with an annular flange, the fixed disc is rotatably connected to the annular flange, and the distance between the rotation axis of the main shell and the mounting surface mounted on the side shell is smaller than the rotation radius of the polishing pad assembly.

[0014] In an embodiment, the self-adaptive flat polishing device further comprises a counterweight assembly detachably mounted on the mounting seat or the frame.

[0015] The technical scheme provided by the embodiment of the present application can have the following beneficial effects: the polishing mechanism is detachably mounted on the connecting seat, and the polishing mechanism can be used independently or in combination with the self-adaptive mechanism to realize the functional use of the polishing device in different application scenarios. The self-adaptive mechanism, as the active posture adjusting part of the polishing mechanism and the frame, can adapt to the ground changes with large undulating height, improve the flatness and polishing efficiency of the floor. The two groups of front elastic assemblies and the two groups of rear elastic assemblies can adjust and pre-press the posture of the connecting seat relative to the mounting seat, and the front joint spherical joint can realize omnidirectional rotation, so that the polishing mechanism can adapt to the ground changes and swing without affecting the vibration of the entire polishing device, and the polishing effect is good. BRIEF DESCRIPTION OF DRAWINGS

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

[0017] Figure 1 is a structural schematic view of a self-adaptive flat polishing device according to an embodiment.

[0018] Figure 2 is an exploded structural schematic view of a self-adaptive flat polishing device according to an embodiment.

[0019] Figure 3 is a schematic view of the polishing mechanism used independently according to an embodiment.

[0020] Figure 4 is a bottom view of the polishing mechanism according to an embodiment.

[0021] Figure 5 is a schematic view of the self-adaptive mechanism according to an embodiment.

[0022] Figure 6 is an exploded schematic view of the self-adaptive mechanism according to an embodiment.

[0023] Figure 7 is a structural schematic view of the counterweight assembly mounted on the self-adaptive mechanism according to an embodiment.

[0024] Figure 8 is a structural schematic diagram of a self-adaptive mechanism for folding a handrail assembly according to an embodiment.

[0025] In the figure, 10 is a frame, 11 is a frame body, 111 is a second mounting position, 12 is a roller assembly, 13 is a handrail assembly, 131 is a connecting frame, 132 is a handrail frame, 14 is a balance frame, 20 is a self-adaptive mechanism, 21 is a mounting seat, 211 is a support wall, 212 is an assembly wall, 213 is a clearance hole, 214 is a support boss, 22 is a connecting seat, 221 is a top wall, 222 is a mounting wall, 23 is a front elastic assembly, 231 is a front joint spherical joint, 232 is a front compression spring, 233 is a front pull rod, 234 is an adjusting sleeve, 24 is a rear elastic assembly, 241 is a rear joint spherical joint, 242 is a rear compression spring, 243 is a rear pull rod, 25 is a top pull assembly, 251 is a top pull rod, 252 is a top joint spherical joint, 26 is an adjusting column, 30 is a polishing mechanism, 31 is a shell assembly, 311 is a first locking, 312 is a third locking point, 32 is a protective cover assembly, 321 is a fixed disc, 322 is a rotating disc, 3221 is a main shell, 3222 is a side shell, 3223 is a mounting groove, 3224 is a cover space, 323 is a dustproof brush, 324 is a guide wheel, 33 is a polishing piece assembly, and 40 is a dust collection assembly, and 50 is a counterweight assembly. DETAILED DESCRIPTION

[0026] Among them, the drawings are only used for example, the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation of the present application; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings may be omitted.

[0027] As Figures 1 to 4 shown, the present application provides a self-adaptive flat polishing device, which comprises a frame 10, a self-adaptive mechanism 20 and a polishing mechanism 30. The self-adaptive mechanism 20 is mounted at the front end of the frame 10 and can be independently disassembled and connected to the polishing mechanism 30. The polishing mechanism 30 is used for polishing flat surfaces. The polishing mechanism 30 is an independent polishing mechanism 30 to perform polishing work. For example, the polishing main body part of the polishing mechanism 30 is similar to the structure of an angle grinder. When the polishing mechanism 30 is assembled in the self-adaptive mechanism 20, the rear end of the frame 10 is mounted with a roller assembly 12. The operator pushes the handrail assembly 13 of the frame 10 to push and translate the polishing mechanism 30 for polishing and swinging. When the polishing mechanism 30 is operated independently, the operator can hold the polishing mechanism 30 to polish the ground or wall, realizing one machine with multiple uses.

[0028] The adaptive mechanism 20 automatically adjusts the polishing posture and polishing angle of the polishing mechanism 30 according to the changes of the ground undulations, so that the uneven parts of the terrace can be gradually polished to the preset plane height and angle. The adaptive mechanism 20 includes a mounting seat 21, a connecting seat 22, a top-pulling assembly 25, two groups of front elastic assemblies 23 and two groups of rear elastic assemblies 24. The mounting seat 21 and the connecting seat 22 are oppositely arranged, wherein the mounting seat 21 is located above the connecting seat 22. The top-pulling assembly 25, the two groups of front elastic assemblies 23 and the two groups of rear elastic assemblies 24 are movably connected to the mounting seat 21 and the connecting seat 22, respectively.

[0029] As shown in Figure 2 , Figure 5 and Figure 6 , the adaptive mechanism 20 cooperates with the four groups of elastic assemblies through the top-pulling assembly 25, utilizes the multi-angle movement characteristics of the joint spherical joint and the elastic adjustment function of the compression spring, so that the polishing mechanism 30 can flexibly adapt to the changes of the ground undulations, effectively solving the poor adaptability of the existing device to uneven ground, and ensuring the flatness and consistency of the polished surface.

[0030] The mounting seat 21 includes a support wall 211 and assembly walls 212 located on both sides of the support wall 211. The assembly walls 212 are fixed to the two sides of the rack 10 by fasteners. The polishing mechanism 30 is detachably mounted on the connecting seat 22, and the connecting seat 22 is located between the support wall 211 and the polishing mechanism 30.

[0031] The connecting seat 22 and the mounting seat 21 are movably connected by the top-pulling assembly 25, the two groups of front elastic assemblies 23 and the two groups of rear elastic assemblies 24. The two groups of front elastic assemblies 23 are movably connected to the opposite sides of the connecting seat 22, and the two groups of rear elastic assemblies 24 are movably connected to the ends of the connecting seat 22. The center line of the two groups of front elastic assemblies 23 and the two groups of rear elastic assemblies 24 is approximately a quadrilateral structure, for example, a rectangle or a trapezoid.

[0032] As a preferred embodiment, the center line of the two groups of front elastic assemblies 23 and the two groups of rear elastic assemblies 24 is a trapezoid. The trapezoidal layout structure forms a stable support structure for the four groups of elastic assemblies, uniformly disperses the load of the connecting seat 22 and the polishing mechanism 30, and at the same time, the trapezoidal structure provides the connecting seat 22 with a multi-directional movement adjustment allowance, ensuring that the polishing mechanism 30 can flexibly rotate relative to the mounting seat 21 when the ground undulates, and can automatically reset after the offset force disappears.

[0033] In an embodiment, the front elastic assembly 23 comprises 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 part and a movable ball part, the movable ball part can rotate in any direction within a preset range relative to the connecting part, and the movable ball part is provided with a through mounting hole. The connecting part of the front joint ball joint 231 is connected to the side surface of the connecting seat 22, one end of the front pull rod 233 is mounted to the mounting hole of the movable ball part, 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 are elastically pushed against the front joint ball joint 231 and the mounting seat 21 respectively, and since the mounting seat 21 is fixed in position, the front compression spring 232 exerts an elastic pre-tightening force on the connecting seat 22. The adjusting sleeve 234 is connected to the front pull rod 233 and abuts against the mounting seat 21, and when the adjusting sleeve 234 is screwed and rotated to abut against the mounting seat 21, the length of the front pull rod 233 can be adjusted in the axial direction to adjust the pre-pressing force of the front compression spring 232 on the connecting seat 22. The provision of the adjusting sleeve 234 in the front elastic assembly 23 can accurately adjust the pre-pressing force of the front compression spring 232, achieving fine control of the polishing pressure.

[0035] The front elastic assembly 23 is located at the front end of the adaptive mechanism 20, which is the forward direction of the polishing device. Two groups of front elastic assemblies 23 are connected to the two 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 assembly 24 is located at the rear end of the adaptive mechanism 20, and the center distance between the two rear elastic assemblies 24 is smaller than the center distance between the two front elastic assemblies 23, forming a trapezoidal layout structure. The two rear elastic assemblies 24 can floatingly support the rear end of the connecting seat 22 and also provide a support basis for the swing of the front elastic assembly 23, playing a floating "rudder" function, which is conducive to the overall adaptive movement of the adaptive mechanism 20.

[0037] The rear elastic assembly 24 comprises 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 surface of the connecting seat 22, the rear pull rod 243 is mounted to the rear joint ball joint 241 and passes through the mounting seat 21, and the rear compression spring 242 elastically pushes against the rear joint ball joint 241 and the mounting seat 21.

[0038] The rear elastic assembly 24 and the front elastic assembly 23 have basically the same structure, except that the rear elastic assembly 24 can not be configured with an adjusting sleeve 234, and the automatic balance of the adaptive mechanism 20 is realized through the top pull assembly 25 and the front elastic assembly 23. Alternatively, the rear elastic assembly 24 can also be configured with an adjusting sleeve 234 structure.

[0039] In the embodiment, the front elastic assembly 23 and the rear elastic assembly 24 are connected to the connecting seat 22 through the joint spherical joints, and the active parts of the front elastic assembly 23 and the rear elastic assembly 24 are close to the connecting seat 22.

[0040] As shown in Figure 2 , Figures 5 to 7 Further, the top pull assembly 25 includes a top pull rod 251 and a top joint spherical joint 252, one end of the top pull rod 251 is fixed to the connecting seat 22, the other end of the top pull rod 251 passes through the mounting seat 21, the top pull rod 251 is movably connected to the mounting seat 21 through the top joint spherical joint 252, and the top pull assembly 25 is located in the enclosed area of the two groups of front elastic assemblies 23 and the two groups of rear elastic assemblies 24. The mounting seat 21 is provided with a through avoidance hole 213 at the support wall 211, and the top pull assembly 25 passes through the avoidance hole 213. The support wall 211 is provided with a support boss 214 on the upper surface, and the top joint spherical joint 252 is connected to the support boss 214, so that the active part of the top pull assembly 25 is located above the mounting seat 21.

[0041] The top pull assembly 25, the two groups of front elastic assemblies 23 and the two groups of rear elastic assemblies 24 are movably connected, the top pull assembly 25 constitutes the upper end of the middle part to move, so that the mounting seat 21 can be integrally swung or twisted around the top joint spherical joint 252, the degree of freedom is high, and automatic balance can be realized.

[0042] As preferred, the first distance is smaller than the second distance, wherein the plane where the top pull assembly 25 and the two groups of front elastic assemblies 23 are located is the first distance, and the plane where the top pull assembly 25 and the two groups of rear elastic assemblies 24 are located is the second distance. The first distance is smaller than the second distance, so that the front end of the self-adaptive mechanism 20 can have a larger swing angle and a smaller swing amplitude.

[0043] As preferred, the diameter of the rear pull rod 243 is smaller than the diameter of the front pull rod 233. Based on the difference in force distribution between the front elastic assembly 23 and the rear elastic assembly 24, the front elastic assembly 23 needs to bear greater support and adjustment load, the diameter of the front pull rod 233 is increased to improve the structural strength, the rear pull rod 243 adopts a smaller diameter to realize lightweight design while ensuring the function, and the overall structure stress balance is optimized. Alternatively, the diameter of the rear pull rod 243 is set to 8mm, and the diameter of the front pull rod 233 is set to 12mm, so that the different diameters are designed to adapt to the force requirements of the two. At the same time, the center lines of the two groups of front elastic assemblies 23 and the two groups of rear elastic assemblies 24 are connected in the shape of an isosceles trapezoid, so that the support force is uniformly distributed.

[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 shell assembly 31 is detachably connected to the connecting seat 22, and the shell assembly 31 can be fitted into the mounting space of the mounting seat 21 and stably connected to the mounting seat 21 through 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 in the same plane. Further preferably, the center line of the first locking point 311 and the center line of 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, so as to form a three-dimensional locking.

[0048] The output shaft of the motor assembly extends into the cover space 3224 of the protective cover assembly 32, and the output shaft is used to connect the polishing pad assembly 33. The protective cover assembly 32 is a cover structure, and the protective cover assembly 32 is mounted on the shell assembly 31. During polishing, the protective cover assembly 32 can collect the dust generated by the polishing pad assembly 33, so as to avoid the dust from escaping and improve the polishing construction environment.

[0049] Further, the adaptive flat polishing device further comprises a dust collection assembly 40 connected to the protective cover assembly 32. The dust collection assembly 40 forms a negative pressure environment in the cover space 3224, so as to collect the dust. The dust collection assembly 40 is connected to the protective cover assembly 32 through a dust collection pipe. Therefore, when the polishing mechanism 30 is detached from the connecting seat 22, the polishing mechanism 30 can perform the function of an angle grinder, and can also cooperate with the dust collection assembly 40 to realize dust collection, thereby greatly improving the diversity of application scenarios. The dust collection assembly 40 adopts an industrial dust collector, which can collect the polishing dust in real time. The industrial dust collector can be mounted on the rack 10, so as to move with the rack 10.

[0050] Preferably, the rack 10 further comprises a balance rack 14, and the balance rack 14 has a balance cavity. The shell assembly 31 is inserted into the balance cavity of the balance rack 14, so as to be limited by the balance rack 14, thereby forming secondary auxiliary support.

[0051] In an embodiment, the protective cover assembly 32 comprises a fixed disc 321, a rotating disc 322 and a dust brush 323. The fixed disc 321 is fixedly connected to the shell assembly 31, and the rotating disc 322 can rotate around the fixed disc 321. The edge of the rotating disc 322 is annular and is formed with a mounting groove 3223, and the dust brush 323 is mounted in the mounting groove 3223. The rotating disc 322 can rotate with the ground, and in particular, the rotating disc 322 can be polished at the corner of the ground. The dust brush 323 is always attached to the ground, so as to improve the dust shielding effect and avoid dust overflow. Meanwhile, the rotatable structure can make the dust brush 323 adapt to the ups and downs of the ground, so as to ensure the continuity of the protection effect.

[0052] Further, the rotating disc 322 comprises a main shell 3221 and a side shell 3222 detachably connected to the main shell 3221, the side shell 3222 and the main shell 3221 are in a circular arc structure, and the combined surface of the main shell 3221 and the side shell 3222 is a plane. When the side shell 3222 is removed, the plane of the main shell 3221 can be attached to the vertical wall of the corner, so that the polishing pad assembly 33 can polish the corner. Further, the main shell 3221 is provided with an annular flange, the fixed disc 321 is rotatably connected to the annular flange, and the distance between the rotation axis of the main shell 3221 and the mounting surface of the side shell 3222 is less than the radius of rotation of the polishing pad assembly 33. The annular flange structure ensures the smooth rotation between the rotating disc 322 and the fixed disc 321, and can always be attached to the wall surface of the corner with the rotation of the self-adaptive flat surface polishing device, avoiding the technical problem of workers working on the ground.

[0053] Further, the main shell 3221 is provided with a guide wheel 324 on both sides, which can slightly protrude from the combined surface to form a rolling guide.

[0054] At the same time, by limiting the distance between the rotation axis of the main shell 3221 and the mounting surface of the side shell 3222, the protective cover assembly 32 can completely cover the working area of the polishing pad assembly 33, and the protection and dust collection effect is improved. The cooperation between the protective cover assembly 32 and the dust collection assembly 40 effectively reduces the diffusion of polishing dust, improves the construction environment, and avoids the influence of dust on the polishing precision.

[0055] In an embodiment, the rotating disc 322 comprises a plurality of elastic members spaced apart and mounted in the mounting groove 3223, and the elastic members elastically push the dust brush 323. The elastic members provide continuous elastic pressure to the dust brush 323, ensuring that the dust brush 323 can closely adhere to the ground when the ground is uneven, avoiding dust leakage due to gaps, and buffering the rigid collision between the dust brush 323 and the ground, prolonging the service life of the dust brush 323.

[0056] As shown in Figure 1 , Figure 7 , and Figure 8 , in order to further improve the polishing effect of the self-adaptive flat surface polishing device, the counterweight assembly 50 is adjusted at different mounting positions according to the depth and polishing amount of the polishing surface. The self-adaptive flat surface polishing device further comprises a counterweight assembly 50, which is detachably mounted on the mounting seat 21 or the rack 10. The polishing mechanism 30 and the connecting seat 22 are detachably connected, and cooperate with the flexible adjustment of the counterweight assembly 50, so that the device can be used for polishing various floor materials, and different types of polishing mechanisms 30 can be replaced according to needs, expanding the application scenarios of the device.

[0057] Optionally, the counterweight assembly 50 can be installed at different positions to form different gravity action positions. The frame 10 comprises a frame body 11, a handrail assembly 13 and a roller assembly 12 installed at one end of the frame body 11, and the adaptive mechanism 20 is installed at the other end of the frame body 11. The connecting portion is arranged on the mounting seat 21, and the connecting portion is used to connect the counterweight assembly 50. Accordingly, the connecting portion serves as a first mounting position, so that the polishing center of the polishing mechanism 30 is located in the projection range of the counterweight assembly 50, that is, the projection of the counterweight assembly 50 on the polishing plane. The gravity of the counterweight assembly 50 acts entirely on the polishing mechanism 30, so that the pressure on the polishing mechanism 30 is increased, and then the grinding force of the polishing mechanism 30 on the ground is increased, which is suitable for large grinding amount of ground polishing.

[0058] The frame 10 is further provided with a second mounting position 111 at the adaptive mechanism 20 and the handrail assembly 13, and the counterweight assembly 50 is installed at the second mounting position 111, so that the counterweight assembly 50 can be away from the polishing mechanism 30 and can also provide pressure to the polishing mechanism 30. When the counterweight assembly 50 is installed at the second mounting position 111, part of the gravity of the counterweight assembly 50 is borne by the roller assembly 12, so that the pressure on the polishing mechanism 30 is reduced, and then the grinding force of the polishing mechanism 30 on the ground is reduced, which is suitable for small grinding amount of ground polishing.

[0059] The handrail assembly 13 comprises a connecting frame 131 and a handrail frame 132 connected to the connecting frame 131, and 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 overturned state to facilitate packaging and transportation. The frame 10 is a rigid frame structure to improve the overall structural strength.

[0060] The construction process of the adaptive flat polishing device is as follows: selecting a suitable polishing disc assembly 33 according to the hardness of the floor material and installing it on the output shaft of the motor assembly, adjusting the pre-pressure of the front compression spring 232 through the adjusting sleeve 234, and installing the corresponding number of counterweight assemblies 50 according to the needs. Start the motor assembly and the dust collection assembly 40, the motor assembly drives the polishing disc assembly 33 to rotate at high speed, and the polishing disc assembly 33 polishes the ground.

[0061] When polishing to the ground convex position, the polishing pad assembly 33 is subjected to upward force, which is transmitted to the front and rear elastic assemblies 23 and 24 through the connecting seat 22, the front or rear compression spring 232 on the corresponding side is compressed, the connecting seat 22 rotates around the top joint ball joint 252 of the top pull assembly 25, so that the polishing pad assembly 33 is automatically lifted with the ground convex; when polishing to the ground concave position, the connecting seat 22 reversely rotates under the elastic recovery force of the compression spring, the polishing pad assembly 33 is automatically lowered with the concave position, always keeps in contact with the ground, and ensures the polishing flatness. During the whole process, the dust brush 323 always keeps in contact with the ground under the action of the elastic member, cooperates with the dust collection assembly 40 to effectively collect dust, and improves the construction environment.

[0062] It is to be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The application is intended to cover any adaptations or variations of the present application followed in the spirit of the application and including such as come within the scope of the present application.

Claims

1. An adaptive flat sanding device, characterized in that, The adaptive mechanism comprises a mounting base, a connecting base, a top-pulling assembly, two sets of front elastic assemblies and two sets of rear elastic assemblies, the mounting base is fixedly connected to the rack, the polishing mechanism is detachably mounted on the connecting base, two sets of front elastic assemblies are movably connected to opposite sides of the connecting base, two sets 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, the other end of the top-pulling assembly passes through the mounting base and is movably connected to the mounting base through a top joint ball joint, and the top-pulling assembly is located in the enclosed area of the two sets of front elastic assemblies and the two sets of rear elastic assemblies. The front elastic assembly comprises 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 base, the front pull rod is mounted on the front joint ball joint and passes through the mounting base, the front compression spring elastically abuts against the front joint ball joint and the mounting base, and the adjusting sleeve is connected to the front pull rod and abuts against the mounting base to adjust the pre-pressing force of the front compression spring. The rear elastic assembly comprises 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 base, the rear pull rod is mounted on the rear joint ball joint and passes through the mounting base, and the rear compression spring elastically abuts against the rear joint ball joint and the mounting base.

2. The adaptive flat sanding device of claim 1, wherein, The diameter of the rear pull rod is smaller than that of the front pull rod.

3. The adaptive flat sanding device of claim 2, wherein, The center lines of the two sets of front elastic assemblies and the two sets of rear elastic assemblies are connected in a trapezoidal shape.

4. The adaptive flat sanding device of claim 1, wherein, The connecting base comprises an adjusting column, a top wall and mounting walls bent from both sides of the top wall, opposite sides of the polishing mechanism are assembled to the mounting walls through fasteners, both ends of the adjusting column abut against the top wall and the top surface of the polishing mechanism respectively, fasteners are locked to the polishing mechanism after passing through the top wall and the adjusting column, and the rotating shaft of the polishing mechanism is located in a triangular projection area formed at the connecting position of the polishing mechanism and the connecting base.

5. The adaptive flat sanding device of claim 1, wherein, The polishing mechanism comprises a shell assembly, a control assembly mounted on the shell assembly, a motor assembly and a protective cover assembly, the shell assembly is detachably connected to the connecting base, the output shaft of the motor assembly extends into the cover space of the protective cover assembly, the output shaft is used to connect a polishing disc assembly, and the adaptive flat surface polishing device further comprises a dust collection assembly connected to the protective cover assembly.

6. The adaptive flat sanding device of claim 1, wherein, The protective cover assembly comprises a fixed disc, a rotating disc and a dust brush, the fixed disc is fixedly connected to the shell assembly, the rotating disc is rotatably arranged around the fixed disc, the edge of the rotating disc is annular and is formed with a mounting groove, and the dust brush is mounted in the mounting groove.

7. The self-adapting planar polishing apparatus of claim 6, wherein, The rotating disc comprises a plurality of elastic members mounted in the mounting groove, and the elastic members elastically abut against the dust brush.

8. The self-adapting planar polishing apparatus of claim 7, wherein, ​ 9. The self-adapting planar polishing apparatus of claim 7, wherein, The rotating disc comprises a main shell and a side shell detachably connected to the main shell, the main shell is provided with an annular flange, the fixed disc is rotatably connected to the annular flange, and the distance between the rotation axis of the main shell and the mounting surface mounted to the side shell is smaller than the rotation radius of the polishing disc assembly.

10. The adaptive flat sanding device of any of claims 1 to 9, wherein, The self-adaptive flat polishing device further comprises a counterweight assembly which is detachably mounted to the mounting seat or the frame.

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