Handheld electric grinding device

Abstract

The utility model discloses a handheld electric polishing device which comprises an abrasive paper clamping piece, an abrasive paper polishing piece, a connecting rod piece and a handheld motor. The abrasive paper polishing part is of a hollow cylindrical structure, the abrasive paper clamping part is of a hollow cylindrical structure, the abrasive paper clamping part is inserted into the abrasive paper polishing part, and abrasive paper wraps the abrasive paper polishing part and is clamped and fixed through the abrasive paper clamping part; the connecting rod piece is of a cylindrical structure and is installed in the abrasive paper clamping piece, one end of the connecting rod piece is coaxially and fixedly connected with an output shaft of the handheld motor, and the abrasive paper clamping piece, the abrasive paper polishing piece and the connecting rod piece are made to synchronously rotate through the handheld motor. The utility model relates to the technical field of constructional engineering, and can solve the problems of low efficiency, high labor intensity and uneven polishing quality level of manual polishing of special-shaped components in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, in particular to a handheld electric grinding device. Background Art

[0002] Construction sites often feature numerous steel, wood, and stone structures. After being cut according to design requirements, each component requires polishing of the cut surface. For conventional square and round tubes, numerous polishing devices are available in the prior art. For example, Chinese utility model patent CN218534015U discloses a steel component polishing device that efficiently polishes uniformly shaped components. However, with the increasing diversification and personalized design of building structures, the custom-shaped design of components has become commonplace, and existing polishing devices are unable to meet the polishing requirements of these custom-shaped components.

[0003] For irregularly shaped components with variable angles, sizes, and shapes, manual grinding is required, which is inefficient, labor-intensive, and uneven in quality. Therefore, a handheld electric grinding device is needed to address the existing problems of low efficiency, high labor intensity, and uneven grinding quality in manual grinding of irregularly shaped components. Summary of the Invention

[0004] The purpose of the utility model is to provide a handheld electric grinding device, which can solve the problems of low efficiency, high labor intensity and uneven grinding quality in the prior art of manual grinding of special-shaped components.

[0005] The utility model is achieved in this way:

[0006] A handheld electric sanding device comprises a sandpaper clamp, a sandpaper sanding piece, a connecting rod and a handheld motor; the sandpaper sanding piece is a hollow cylindrical structure, the sandpaper clamp is a hollow cylindrical structure, the sandpaper clamp is inserted into the sandpaper sanding piece, and the sandpaper is wrapped around the sandpaper sanding piece and clamped and fixed by the sandpaper clamp; the connecting rod is a cylindrical structure, installed in the sandpaper clamp, and one end of the connecting rod is coaxially fixed to the output shaft of the handheld motor, so that the sandpaper clamp, the sandpaper sanding piece and the connecting rod are rotated synchronously by the handheld motor.

[0007] An open groove is formed on the sandpaper polishing piece, so that the sandpaper is wrapped on the outer wall of the sandpaper polishing piece, and both ends of the sandpaper extend into the sandpaper polishing piece through the open groove.

[0008] The sandpaper polishing piece, the opening groove and the sandpaper clamp are arranged throughout the entire length.

[0009] There is a gap between the outer wall of the sandpaper clamp and the inner wall of the sandpaper polishing piece, and the width of the gap is smaller than the thickness of the sandpaper, so that the two ends of the sandpaper are clamped in the sandpaper polishing piece through the sandpaper clamp, and the sandpaper is set tightly against the outer wall of the sandpaper polishing piece.

[0010] The connecting rod is a screw rod, one end of which is formed with a connecting spline matching the output shaft of the handheld motor, so that the one end of the screw rod is coaxially fixedly connected to the output shaft of the handheld motor.

[0011] The length of the screw is greater than that of the sandpaper clamp, so that both ends of the screw extend out of the two ends of the sandpaper clamp respectively; the two ends of the screw are screwed with nuts, and the two nuts respectively abut on the end surfaces of the two ends of the sandpaper clamp.

[0012] The sandpaper clamping piece, the sandpaper polishing piece, the connecting rod and the output shaft of the handheld motor are coaxially arranged.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The utility model is provided with a sandpaper clamp and a sandpaper polishing member. The sandpaper is wrapped on the outer wall of the cylindrical sandpaper polishing member. The two ends of the sandpaper are inserted into the sandpaper polishing member from the open groove and clamped by the sandpaper clamp, so that the sandpaper can be easily and simply disassembled and assembled, and the installation is firm and will not slip during the polishing process. The friction between the sandpaper clamp, the sandpaper polishing member and the sandpaper can ensure the synchronization of rotation, thereby facilitating the self-rotation polishing operation of the sandpaper.

[0015] 2. The utility model is provided with a connecting rod and a hand-held motor. The sandpaper clamp is coaxially fixedly connected to the output shaft of the hand-held motor through the connecting rod. The hand-held motor is used to provide a driving force for the rotation of the sandpaper, so that the sandpaper can rotate at a uniform speed. The sanding operation can be achieved by simply sticking the sandpaper to the surface of the component. The technical level of the construction workers is relatively low, and the labor intensity of the sanding operation can be greatly reduced, thereby improving the quality and efficiency of the sanding operation.

[0016] 3. The utility model is provided with a sandpaper polishing piece, which utilizes a cylindrical structure to ensure that the sandpaper forms a cylindrical structure with a smooth surface, thereby evenly polishing the component surface during the rotation of the sandpaper. In addition, the sandpaper polishing piece of appropriate size can be selected according to the different angles, sizes, and shapes of the special-shaped component structures to ensure adaptability to various special-shaped components, and has good practicality and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the handheld electric grinding device of the utility model;

[0018] Figure 2It is an exploded view of the handheld electric grinding device of the utility model.

[0019] In the figure, 1 is a sandpaper clamp, 2 is a sandpaper polishing part, 201 is an open slot, 3 is a connecting rod, 301 is a nut, and 4 is a handheld motor. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Please see the attached Figure 1 and attached Figure 2 A handheld electric sanding device includes a sandpaper clamp 1, a sandpaper sanding piece 2, a connecting rod 3 and a handheld motor 4; the sandpaper sanding piece 2 is a hollow cylindrical structure, the sandpaper clamp 1 is a hollow cylindrical structure, the sandpaper clamp 1 is differentially connected in the sandpaper sanding piece 2, and the sandpaper (not shown in the figure) is wrapped on the sandpaper sanding piece 2 and clamped and fixed by the sandpaper clamp 1; the connecting rod 3 is a cylindrical structure, the connecting rod 3 is installed in the sandpaper clamp 1, and one end of the connecting rod 3 is coaxially fixed with the output shaft of the handheld motor 4, so that the sandpaper clamp 1, the sandpaper sanding piece 2 and the connecting rod 3 are rotated synchronously by the handheld motor 4.

[0022] Preferably, the sandpaper clamp 1 and the sandpaper polishing piece 2 can be made of PVC tubes, and the size of the sandpaper clamp 1 can be one specification smaller than the size of the sandpaper polishing piece 2, so that the sandpaper clamp 1 can be inserted into the sandpaper polishing piece 2, thereby clamping the end of the sandpaper in the sandpaper polishing piece 2 through the sandpaper clamp 1.

[0023] The connecting rod 3 is used to connect the handheld motor 4 and the sandpaper clamp 1. The sandpaper is wrapped on the sandpaper polishing piece 2. Under the drive of the handheld motor 4, the sandpaper polishing piece 2 can be rotated to drive the sandpaper to rotate synchronously, thereby utilizing the rotation of the sandpaper to achieve efficient polishing of various components. Construction workers only need to stick the sandpaper to the polishing position of the component, which greatly reduces the labor intensity of the polishing operation and is conducive to improving the efficiency and quality of the polishing operation.

[0024] Preferably, the handheld motor 4 can adopt a small handheld motor with bidirectional rotation function in the prior art, which is used to provide a driving force for uniform rotation of the connecting rod 3, and its power and rotation rate can be adaptively adjusted according to actual grinding requirements.

[0025] Please see the attached Figure 1 and attached Figure 2 An open groove 201 is formed on the sandpaper polishing piece 2, so that the sandpaper is wrapped on the outer wall of the sandpaper polishing piece 2, and both ends of the sandpaper extend into the sandpaper polishing piece 2 through the open groove 201.

[0026] The outer surface of the sandpaper polishing member 2 is smooth and flat, allowing the sandpaper to effectively fit and wrap around the outer surface of the sandpaper polishing member 2, ensuring that the sandpaper forms a smooth cylindrical structure without wrinkles or protrusions, thereby ensuring the quality of the sandpaper polishing the component surface. The ends of the sandpaper are inserted into the sandpaper polishing member 2 through the open slots 201, and the ends of the sandpaper are clamped by the sandpaper clamp 1, ensuring that the sandpaper does not slip, shift, or fall off during the polishing process.

[0027] Please see the attached Figure 1 and attached Figure 2 The sandpaper polishing piece 2, the opening groove 201 and the sandpaper clamp 1 are arranged throughout the length.

[0028] The length of the sandpaper polishing member 2 is not less than the length of the sandpaper, thereby ensuring that the sandpaper can be completely attached to the outer wall of the sandpaper polishing member 2. The two ends of the sandpaper can be inserted into the sandpaper polishing member 2 through the full-length open slot 201 and then clamped by the sandpaper clamp 1. The large clamping contact area between the sandpaper polishing member 2, the open slot 201, and the sandpaper clamp 1 can provide a large clamping friction force for the two ends of the sandpaper, thereby ensuring the uniform rotation of the sandpaper to meet the requirements of the polishing operation.

[0029] There is a gap between the outer wall of the sandpaper clamp 1 and the inner wall of the sandpaper polishing piece 2, and the width of the gap is slightly smaller than the thickness of the sandpaper, so that the two ends of the sandpaper are clamped in the sandpaper polishing piece 2 through the sandpaper clamp 1, and the sandpaper is set tightly against the outer wall of the sandpaper polishing piece 2.

[0030] The gap between the sandpaper clamp 1 and the sandpaper polishing piece 2 is utilized to clamp the two ends of the sandpaper in the sandpaper polishing piece 2, so that the main part of the sandpaper is wrapped on the outer wall of the sandpaper polishing piece 2, and the interference fit is utilized to provide a larger tightening friction force, thereby achieving effective clamping between the sandpaper clamp 1, the sandpaper polishing piece 2 and the sandpaper, ensuring that the main part of the sandpaper will not wrinkle or slip on the outer wall of the sandpaper polishing piece 2.

[0031] The connecting rod 3 is a screw, one end of which is formed with a connecting spline (not shown in the figure) that matches the output shaft of the handheld motor 4, so that one end of the screw is coaxially fixedly connected to the output shaft of the handheld motor 4.

[0032] The connecting rod 3 can be connected to the output shaft of the handheld motor 4 by connecting splines, linkage shafts, etc. to achieve reliable connection and synchronous rotation, thereby ensuring that the sandpaper can rotate under the drive of the handheld motor 4, thereby achieving the grinding operation, and can adapt to handheld motors 4 of different specifications and models.

[0033] Please see the attached Figure 1The length of the screw is greater than the length of the sandpaper clamp 1, so that the two ends of the screw extend out of the two ends of the sandpaper clamp 1; the two ends of the screw are screwed with nuts 301, and the two nuts 301 are respectively in contact with the end faces of the sandpaper clamp 1 at both ends.

[0034] By rotating the thread of the nut 301 on the screw rod, the distance between the two nuts 301 can be adjusted, so that the two nuts 301 are respectively pressed against the end faces of the sandpaper clamp 1, and the tightening friction force is used to ensure the rotation synchronization of the sandpaper clamp 1 and the connecting rod 3, so that sandpaper clamps 1 and sandpaper grinding parts 2 of different lengths can be easily replaced to adapt to sandpaper of different sizes and different grinding requirements.

[0035] The sandpaper clamp 1, sandpaper polishing member 2, connecting rod 3 and the output shaft of the handheld motor 4 are coaxially arranged to ensure coaxiality and synchronization during rotation, so that when the sandpaper is attached to the polishing surface required by the component, automatic and uniform polishing can be achieved through self-rotation.

[0036] Please see the attached Figure 1 and attached Figure 2 , the method of using the utility model is:

[0037] Wrap the sandpaper on the outer wall of the sandpaper polishing piece 2, and wrap the two ends of the sandpaper around the inner wall of the sandpaper polishing piece 2 through the open groove 201, insert the sandpaper clamp 1 into the sandpaper polishing piece 2, so that the sandpaper clamp 1 presses the two ends of the sandpaper tightly into the gap between the sandpaper polishing piece 2 and the sandpaper clamp 1, ensuring that the sandpaper is firmly wrapped on the sandpaper polishing piece 2 and is flattened without wrinkles.

[0038] The connecting rod 3 is installed in the sandpaper clamp 1 and is adjusted by rotating the two nuts 301 to abut against the top and bottom surfaces of the sandpaper clamp 1. One end of the connecting rod 3 is coaxially fixedly connected to the output shaft of the handheld motor 4 through a connecting spline.

[0039] When sanding ordinary or special-shaped components, the handheld motor 4 is started, and the output shaft of the handheld motor 4 drives the connecting rod 3 to rotate. The friction between the sandpaper clamp 1, the connecting rod 3, and the sandpaper sanding member 2 is used to make the sandpaper sanding member 2 rotate synchronously with the connecting rod 3. When the sandpaper sanding member 2 rotates at high speed, it drives the sandpaper to rotate synchronously, and the sandpaper is applied to the position of the component to be sanded, thereby achieving efficient sanding operation.

[0040] According to the changes in the shape, size, angle and other special-shaped shapes of the special-shaped components, the sandpaper polishing piece 2 with a suitable diameter can be selected to adapt to various special-shaped components to the greatest extent.

[0041] After the grinding is completed, the sandpaper clamp 1 is taken out, and the sandpaper can be disassembled and replaced, and the turnover rate of the entire device is high.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A handheld electric grinding device, characterized by: The invention comprises a sandpaper clamp (1), a sandpaper polishing piece (2), a connecting rod (3) and a handheld motor (4); the sandpaper polishing piece (2) is a hollow cylindrical structure, the sandpaper clamp (1) is a hollow cylindrical structure, the sandpaper clamp (1) is inserted into the sandpaper polishing piece (2), and the sandpaper is wrapped on the sandpaper polishing piece (2) and is clamped and fixed by the sandpaper clamp (1); the connecting rod (3) is a cylindrical structure, the connecting rod (3) is installed in the sandpaper clamp (1), and one end of the connecting rod (3) is coaxially fixedly connected to the output shaft of the handheld motor (4), so that the sandpaper clamp (1), the sandpaper polishing piece (2) and the connecting rod (3) are rotated synchronously by the handheld motor (4).

2. The handheld electric grinding device according to claim 1, characterized in that: An open groove (201) is formed on the sandpaper polishing piece (2), so that the sandpaper is wrapped around the outer wall of the sandpaper polishing piece (2), and both ends of the sandpaper extend into the sandpaper polishing piece (2) through the open groove (201).

3. The handheld electric grinding device according to claim 1 or 2, characterized in that: The sandpaper polishing piece (2), the opening groove (201) and the sandpaper clamp (1) are arranged throughout the entire length.

4. The handheld electric grinding device according to claim 2, characterized in that: A gap is left between the outer wall of the sandpaper clamp (1) and the inner wall of the sandpaper polishing piece (2), and the width of the gap is smaller than the thickness of the sandpaper, so that the two ends of the sandpaper are clamped in the sandpaper polishing piece (2) through the sandpaper clamp (1), and the sandpaper is arranged in close contact with the outer wall of the sandpaper polishing piece (2).

5. The handheld electric grinding device according to claim 1, characterized in that: The connecting rod (3) is a screw rod, one end of which is formed with a connecting spline that matches the output shaft of the handheld motor (4), so that the one end of the screw rod is coaxially fixedly connected to the output shaft of the handheld motor (4).

6. The handheld electric grinding device according to claim 5, characterized in that: The length of the screw is greater than the length of the sandpaper clamp (1), so that the two ends of the screw extend out of the two ends of the sandpaper clamp (1); the two ends of the screw are screwed with nuts (301), and the two nuts (301) respectively abut against the end surfaces of the two ends of the sandpaper clamp (1).

7. The handheld electric grinding device according to claim 1, characterized in that: The sandpaper clamp (1), sandpaper polishing piece (2), connecting rod (3) and the output shaft of the handheld motor (4) are coaxially arranged.

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