Walk behind floor sander

Abstract

The utility model discloses a walking type ground polisher, including the support frame that is connected by steel square and flat iron bolt, the frame bottom is equipped with universal wheel, and the middle part reservation hollow forms power source installation position, and the common handheld angle grinder can be clamped fast, the periphery of grinding disc is equipped with annular atomizing spray head, and the water supply channel hides in the flat iron, and forms water curtain dust suppression when polishing, the support side wall is equipped with magnetic cable fixed slot, and the power cord can follow the walk and put, avoids winding. When using, the frame is pushed, and the weight of angle grinder is transmitted to the grinding disc through the support, and the pressure self -adaptation is realized in combination with the frame elasticity, and the universal wheel automatically adapts to the ups and downs of ground, and the polishing thickness is consistent at the concave-convex place, the water curtain real -time subsides dust, and the cable is always suspended, and the operation is safe and efficient. The whole machine weight is less than 18kg, and can be carried by one person, is suitable for the narrow space and old ground renovation in and out of room, green construction, low cost, and maintenance is simple.

Description

Technical Field

[0001] This utility model belongs to the technical field of building decoration floor treatment equipment, specifically relating to a walkable floor grinder, which is suitable for grinding operations such as indoor and outdoor flooring, old floor renovation, and coating removal. Background Technology

[0002] Existing floor grinding equipment is mostly a single-unit dedicated grinder, which is large and heavy, requiring an independent power unit and a complex transmission system, making it inconvenient to transport and costly to purchase. In small or scattered site construction, operators often directly hand-hold angle grinders with grinding discs attached, but this has the following drawbacks: The weight of the angle grinder is entirely borne by the arm, which leads to high labor intensity during long-term operation, unstable grinding pressure, and wavy patterns on the ground. The handheld method makes it difficult to maintain the parallelism between the grinding disc and the ground, resulting in uneven grinding thickness at the edges and uneven areas, which affects the flatness. The construction process generates a lot of dust, and the lack of effective dust suppression structures endangers the health of operators and pollutes the environment. The power cord is easy to get tangled when dragged, requiring frequent stops and tidying up during movement, which is inefficient and poses a tripping risk.

[0003] Therefore, it is necessary to provide a floor grinding device that is simple in structure, easy to move, pressure-adaptive, and equipped with dust suppression and cable management to solve the above problems. Utility Model Content

[0004] This utility model aims to overcome the shortcomings of the existing technology and provide a floor grinder that is lightweight, flexible, adaptable to grinding pressure, and has dust suppression and cable management functions. It solves the problems of unstable grinding pressure, poor flatness, serious dust pollution, and power cord entanglement of handheld angle grinders, and achieves efficient, environmentally friendly, and low-labor-intensity floor grinding operations.

[0005] To achieve the above objectives, this utility model is implemented as follows: A portable floor grinder, comprising: Support frame: Composed of crossbeams, columns and connecting arms, with wheels at the bottom, forming a pushable load-bearing body.

[0006] Power source mounting position: located in the middle of the bracket, it can quickly clamp common handheld power tools; angle grinder, no modification required to the original machine.

[0007] Grinding disc assembly: Directly connected to the power output shaft, converting rotational power into grinding action.

[0008] Dust suppression system: A ring-shaped atomizing nozzle is installed around the grinding disc, and water mist is delivered through the internal water supply channel to suppress dust in real time.

[0009] Cable management device: The magnetic cable fixing slot on the side wall guides the power cord to be placed as you walk, avoiding dragging and tangling on the ground.

[0010] Furthermore, the aforementioned walkable floor grinder also includes the following improvements: The machine uses omnidirectional wheels, allowing it to turn 360° and operate flexibly even in confined spaces. The main frame material is made of 25×25×1 mm and 100×100×2 mm steel square tube bolts, which ensures rigidity and reduces the weight of the whole machine, making it easy for one person to move. The power source mounting position is designed with an 80×80×40 mm cavity + bolt clamping structure, requiring no additional clamps and allowing for quick on-site assembly and disassembly. The axis of the annular atomizing nozzle forms an angle of 15°±2° with the tangent of the grinding disc. The water mist is injected tangentially along the disc surface, instantly enveloping the dust and reducing rebound and splashing. The water supply channel is hidden inside the frame, with no exposed hoses, reducing the risk of tripping and preventing the channel from being flattened by external forces, which would affect the flow rate. The magnetic cable fixing slot has a magnetic attraction force of ≥30 N, allowing the power cord to be pressed in or pulled out with one hand, ensuring smooth operation; the slot surface has elongated holes for easy cleaning of cement slurry. An automatic cable retractor is added to the tail section, which automatically retracts excess cable after the machine stops, further eliminating clutter on site.

[0011] An elastic buffer element, such as a gas spring or rubber pad, is added between the frame and the mounting position to automatically adjust the pressure of the grinding disc on the ground according to the ground height, so as to maintain a consistent cutting amount and avoid wavy patterns.

[0012] The disc assembly uses a quick-release flange, which allows for rapid disc replacement, adapting to different surface grit sizes or materials and reducing downtime for disc changes.

[0013] This utility model adopts the above-mentioned design. The overall concept is to combine a handheld angle grinder with a pushable support. The pressure of the grinding disc on the ground is stabilized by the weight of the frame and the elastic buffer, and the unevenness of the ground is compensated for in real time, resulting in uniform grinding thickness without ripples. The casters allow for continuous operation with one hand, reducing labor intensity by more than half. The annular tangential atomization and hidden water channels form a water curtain around the grinding disc, wetting and capturing dust before it can spread, significantly improving on-site visibility. The magnetic guide channel and automatic cord retractor ensure that the power cord is always suspended and moves with the machine, completely eliminating the risks of dragging, tangling, and tripping, achieving efficient, green, and safe ground grinding construction. Attached Figure Description

[0014] Figure 1 This is a top view of the walkable floor grinder shown in this embodiment.

[0015] Figure 2This is a side elevation view of the walkable floor grinder shown in this embodiment. Detailed Implementation

[0016] The following is combined Figure 1 and Figure 2 This utility model will be described in further detail. For ease of comparison, each component appearing for the first time in the text is marked with a reference numeral after its name. These reference numerals are for illustrative purposes only and do not constitute a limitation on the scope of protection.

[0017] like Figure 2 As shown, the main body of the support frame is constructed from 1-meter-long 25×25×1 steel square tubes 1 and 0.5-meter-long 100×100×2 steel square tubes 2, welded together using M12 bolts 6 to form a "door"-shaped structure. Two 250×50×2 flat irons 3 are symmetrically welded to the lower end of the column, forming a forward-extending connecting arm for mounting the traveling wheels and grinding disc assembly. Universal wheels 4 are fixed to the bottom front end of the flat irons, allowing the machine to rotate 360° and be pushed. An 80×80×40 hole 5 is cut in the middle of the column; this hole constitutes the power source mounting position. A common handheld angle grinder head can be inserted into this hole and secured with M12 bolts 6 on both sides for quick assembly and disassembly.

[0018] according to Figure 1 As can be seen, the grinding disc assembly 7 is located below the front end of the flat iron 3 and is directly connected to the output shaft of the angle grinder. A ring-shaped atomizing nozzle 8 is arranged around the grinding disc, and the water inlet of the nozzle is connected to a water supply channel 9 hidden inside the flat iron. External water enters the channel through a quick connector, forming a water curtain during grinding. A magnetic cable fixing slot 10 is provided on the rear side wall of the support frame, allowing the power cord to be magnetically attracted and placed along the slot, preventing it from being dragged on the ground.

[0019] During operation, the operator holds the top handle of the steel square tube 1 and pushes it forward, with the casters 4 automatically adapting to varying ground heights. The weight of the angle grinder is transferred to the grinding disc 7 via the support frame, and the frame's slight elastic deformation dynamically compensates for ground pressure. The dust generated during grinding is immediately enveloped and settled by a water curtain from the annular atomizing nozzles 8, achieving dust suppression. After shutdown, the angle grinder is removed, the water supply is disconnected, and the cables are coiled up, completing the equipment storage process without the need for tools, meeting the requirements for rapid on-site relocation.

[0020] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A portable floor grinder, characterized in that: include: The support frame consists of crossbeams, columns, and connecting arms, and is equipped with wheels at the bottom; A power source mounting position is provided in the middle of the bracket frame for detachably fixing a handheld power tool. A grinding disc assembly, which is connected to the output shaft of a power source, is used for grinding the ground; A dust suppression system, comprising an annular atomizing nozzle and a water supply channel, wherein the annular atomizing nozzle is disposed around the grinding disc assembly and is used to spray water mist onto the grinding area to suppress dust. A cable management device, comprising a magnetic cable fixing slot for guiding and fixing power cables.

2. The walkable floor grinder according to claim 1, characterized in that: The wheels are omnidirectional wheels, located at the end of the connecting arm, allowing the grinder to move flexibly in multiple directions.

3. The walkable floor grinder according to claim 1 or 2, characterized in that: The support frame is constructed by bolting together 25×25×1 mm and 100×100×2 mm steel square tubes to form a lightweight and stable support structure.

4. The walkable floor grinder according to claim 1, characterized in that: The power source mounting position is an 80×80×40 mm cavity structure, which is compatible with common handheld angle grinder heads and is fastened to the bracket frame with bolts.

5. The walkable floor grinder according to claim 1, characterized in that: The nozzle of the annular atomizing nozzle is oriented at an angle of 15°±2° to the tangential direction of the grinding disc assembly to improve water mist coverage efficiency and reduce splashing.

6. The walkable floor grinder according to claim 1 or 5, characterized in that: The water supply channel is integrated inside the support frame and connects to an external water source quick connector, thus concealing the water supply line.

7. The walkable floor grinder according to claim 1, characterized in that: The magnetic cable fixing groove is set on the side wall of the bracket frame, with a magnetic attraction force of ≥30 N, and is used to attract and fix the power cord to prevent dragging and tangling.

8. The walkable floor grinder according to claim 1 or 7, characterized in that: The cable management device also includes an automatic cable retractor, which is located at the end of the support frame and is used to automatically retract the power cord.

9. The walkable floor grinder according to claim 1, characterized in that: An elastic buffer element is provided between the support frame and the power source mounting position to achieve adaptive adjustment of the grinding pressure.

10. The walkable floor grinder according to claim 1, characterized in that: The grinding disc assembly is connected to the power source output shaft via a quick-release flange, making it easy to replace grinding discs of different grit sizes or materials.

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