Portable concrete surface polishing device

Abstract

The utility model belongs to the technical field of concrete surface polishing, and particularly relates to a portable concrete surface polishing device which comprises a polishing piece bottom plate, a polishing piece clamping plate and a grip quick-release head, a mounting seat is arranged on the polishing piece bottom plate, an arc-shaped limiting plate is arranged on the mounting seat, and the grip quick-release head is arranged on the mounting seat. A rotating shaft of a grinding piece clamping plate is rotatably mounted on the mounting base, a first clamping gap is formed between the rotating shaft and the arc-shaped limiting plate, a clamping groove is formed in the rotating shaft in the length direction, and clamping of the first side of abrasive paper is completed through cooperation of the clamping groove and the first clamping gap. Therefore, the first side of the abrasive paper is clamped; the other side of the grinding piece clamping plate makes contact with the grinding piece bottom plate, when the abrasive paper is arranged between the grinding piece clamping plate and the grinding piece bottom plate, clamping of the second side of the abrasive paper is formed, then the grinding piece clamping plate is limited through the grip quick-release head fixedly installed on the grinding piece bottom plate, and therefore replacement of the grip quick-release head and the abrasive paper can be completed at the same time.

Description

Technical Field

[0001] This utility model relates to the field of concrete surface grinding technology, and in particular to a portable concrete surface grinding device. Background Technology

[0002] To facilitate sanding, sandpaper is usually mounted on a sanding board, and then the sandpaper board is held in hand to sand the concrete surface. To improve applicability, quick-release handles and long-handle quick-release heads are provided. When installing sandpaper, the sandpaper and quick-release heads need to be installed and fixed separately.

[0003] When it is necessary to change the sandpaper or the quick-release head, it needs to be disassembled and assembled separately, and a repetitive disassembly and assembly structure is set up. Utility Model Content

[0004] This utility model provides a portable concrete surface grinding device, which solves the shortcomings of the prior art, which has the disadvantages of repeatedly setting up disassembly and assembly structures and having to disassemble and assemble separately when changing sandpaper and quick-release heads.

[0005] This utility model provides the following technical solution:

[0006] A portable concrete surface grinding device includes a grinding part base plate, a grinding part clamping plate, and a handle quick-release head. The grinding part base plate has a mounting seat with an arc-shaped limiting plate. A rotating shaft of the grinding part clamping plate is rotatably mounted on the mounting seat, forming a first clamping gap with the arc-shaped limiting plate. A slot is provided along the length of the rotating shaft, which, in conjunction with the first clamping gap, clamps sandpaper on one side. The other side of the grinding part clamping plate is fitted against the grinding part base plate to clamp sandpaper on the second side. An clearance opening is provided on the grinding part clamping plate for the handle quick-release head to be fixedly installed on the grinding part base plate. The handle quick-release head is equipped with a limiting element to restrict the rotation of the grinding part clamping plate.

[0007] In one possible implementation, the grinding plate includes a base plate body, which is rectangular in shape, and the base plate body is also provided with fixing holes for mounting and fixing the quick-release head of the grip.

[0008] In one possible implementation, the base plate body has a mounting seat on one side and a folded edge on the other side, with a first pressing surface facing inward on the folded edge. The grinding part clamping plate includes a clamping plate body, with a rotating shaft on one side and a second pressing surface on the other side.

[0009] In one possible implementation, limit holes are provided at both ends of the rotating shaft, and clamping plate limit bolts are installed on the mounting base. The clamping plate limit bolts are inserted into the limit holes so that the clamping plate body can rotate about the axis of the rotating shaft.

[0010] In one possible implementation, the slot cross-section is an flared shape that is wider on the outside and narrower on the inside.

[0011] In one possible implementation, the quick-release grip includes a grip, with two grip base plates fixed to the lower part of the grip, and a grip positioning plate fixed between the two grip base plates. The lower part of the grip base plate and the grip positioning plate pass through an clearance opening, and a through hole is provided on the grip positioning plate for the grip fixing bolt to pass through and be fixedly connected to the grinding part base plate.

[0012] In one possible implementation, the grip base plate is provided with a first lock head and a second lock head at both ends. The first lock head and the second lock head press against the clamping plate body, thereby completing the installation of the grip and the fixation of the grinding part clamping plate.

[0013] In one possible implementation, the grip is a cylindrical structure.

[0014] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0015] In this invention, a first clamping gap is formed between the rotating shaft and the arc-shaped limiting plate. When clamping sandpaper, the rotating shaft is first rotated so that the slot is located on the lower side of the arc-shaped limiting plate, thereby allowing one side of the sandpaper to be inserted into the slot. Then, the rotating shaft is rotated so that the slot rotates in the direction of the first clamping gap, and then the sandpaper is clamped between the rotating shaft and the arc-shaped limiting plate, thereby completing the clamping of the first side of the sandpaper. The other side of the grinding part clamping plate contacts the grinding part base plate. When the sandpaper is placed between the grinding part clamping plate and the grinding part base plate, the second side of the sandpaper is clamped. Subsequently, the grinding part clamping plate is limited by the quick-release head of the handle fixedly installed on the grinding part base plate, thereby enabling the replacement of the quick-release head of the handle and the sandpaper to be completed simultaneously. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of the portable concrete surface grinding device provided in an embodiment of this utility model;

[0017] Figure 2 A schematic diagram of the quick-release head for removing the handle of the portable concrete surface grinding device provided in this embodiment of the utility model;

[0018] Figure 3 A schematic diagram of the quick-release head of the handle of the portable concrete surface grinding device provided in this embodiment of the utility model;

[0019] Figure 4 A schematic diagram of the structure of the grinding component base plate of the portable concrete surface grinding device provided in this embodiment of the utility model;

[0020] Figure 5 A schematic diagram of the structure of the grinding component clamping plate of the portable concrete surface grinding device provided in this embodiment of the utility model;

[0021] Figure 6 A schematic diagram of the structure of the grinding part base plate and the grinding part clamping plate of the portable concrete surface grinding device provided in this embodiment of the utility model;

[0022] Figure 7 This is a schematic diagram of the first clamping gap of the portable concrete surface grinding device provided in this embodiment of the present invention.

[0023] Figure label:

[0024] 1. Quick-release grip head; 2. Grinding part base plate; 3. Grinding part clamping plate; 4. First clamping gap;

[0025] 101. Handle; 102. First lock cylinder; 103. Handle base plate; 104. Second lock cylinder; 105. Handle positioning plate; 106. Handle fixing bolt;

[0026] 201. Mounting base; 202. Base plate body; 203. First pressing surface; 204. Fixing hole; 205. Arc-shaped limiting plate; 206. Clamping plate limiting bolt; 207. Folded edge;

[0027] 301. Clearance opening; 302. Clamping plate body; 303. Second pressing surface; 304. Rotating shaft; 305. Limiting hole; 306. Slot. Detailed Implementation

[0028] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0029] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0030] If defects such as pitting or honeycombing appear on the surface of the concrete after pouring due to insufficient vibration, leakage of grout from the formwork, or improper curing, the loose layer needs to be removed by sanding and the surface smoothed. For shallow defects, such as pitting depth <5mm, it can be initially treated with coarse sandpaper (40-120 grit) and then finely sanded with fine sandpaper (150-240 grit).

[0031] To facilitate sanding, sandpaper is usually mounted on a sandpaper grinding plate, and then the sandpaper grinding plate is held in hand to sand the concrete surface. To improve applicability, a quick-release handle and a long-handle quick-release head are provided. When installing sandpaper, the sandpaper and the quick-release head need to be installed and fixed separately.

[0032] The connection structure of the general long rod quick release head and the grip quick release head 1 is the same, except that the upper part of the grip quick release head 1 is provided with a grip, while the top of the long rod quick release head is provided with a rotatable long rod (in this utility model, the long rod quick release head is omitted and no relevant drawings are provided).

[0033] When it is necessary to change the sandpaper or the quick-release head, it needs to be disassembled and assembled separately, and a repetitive disassembly and assembly structure is set up.

[0034] Therefore, the present invention provides a portable concrete surface grinding device that can simultaneously replace sandpaper and quick-release head using only one disassembly structure.

[0035] like Figure 1 As shown, the portable concrete surface grinding device includes a grinding part base plate 2, a grinding part clamping plate 3, and a handle quick-release head 1.

[0036] The grinding base plate 2 includes a base plate body 202, which is rectangular in shape. When the sandpaper is fixed on the grinding base plate 2, the back of the sandpaper is attached to the base plate body 202, and the abrasive surface of the sandpaper faces downward, so that when the grinding device is operated, the abrasive surface of the sandpaper is facing the grinding position for grinding, and the base plate body 202 can support the sandpaper.

[0037] A mounting base 201 is provided on one side of the base plate body 202 for rotating and mounting the grinding part clamping plate 3, and for fixing the arc-shaped limiting plate 205; a fixing hole 204 is also provided on the base plate body 202 for mounting and fixing the handle quick release head 1.

[0038] A grinding part clamping plate 3 is rotatably mounted on the mounting base 201. The grinding part clamping plate 3 includes a clamping plate body 302. An avoidance opening 301 is provided in the middle of the clamping plate body 302 for the quick release head 1 to avoid during installation and fixation. A rotating shaft 304 is provided on one side of the clamping plate body 302. A slot 306 is also provided on the rotating shaft 304 along the length direction. The slot 306 has a flared shape with a wider outer side and a narrower inner side (here, the outer side refers to the direction away from the axis of the rotating shaft 304, and the inner side refers to the direction close to the axis of the rotating shaft 304). The rotating shaft 304 and the arc-shaped limiting plate 205 form a first clamping gap 4 for clamping the first side of the sandpaper.

[0039] The rotating shaft 304 and the arc-shaped limiting plate 205 form a first clamping gap 4. When clamping sandpaper, first rotate the rotating shaft 304 so that the slot 306 is located on the lower side of the arc-shaped limiting plate 205, so that one side of the sandpaper can be inserted into the slot 306. Then rotate the rotating shaft 304 so that the slot 306 rotates in the direction of the first clamping gap 4, and then the sandpaper is inserted between the rotating shaft 304 and the arc-shaped limiting plate 205, thereby completing the clamping of the first side of the sandpaper.

[0040] The other side of the grinding part clamping plate 3 contacts the grinding part base plate 2. When the sandpaper is placed between the grinding part clamping plate 3 and the grinding part base plate 2, it forms a clamping of the second side of the sandpaper.

[0041] The base plate body 202 has a folded edge 207 on the other side, and the folded edge 207 has a first pressing surface 203 facing inward. The clamping plate body 302 has a second pressing surface 303 on the other side.

[0042] At this time, there is still a distance between the second pressing surface 303 on the other side of the clamping plate body 302 and the first pressing surface 203 of the base plate body 202. The other side of the sandpaper is inserted between the first pressing surface 203 and the second pressing surface 303. Then, the clamping plate body 302 is rotated downward (towards the base plate body 202). Finally, the second pressing surface 303 presses against the first pressing surface 203, and the sandpaper is located between the second pressing surface 303 and the first pressing surface 203. A second clamping gap is formed between the second pressing surface 303 and the first pressing surface 203, thereby completing the clamping of the second side of the sandpaper.

[0043] A quick-release grip head 1 is fixedly installed on the base plate 2 of the grinding part. The quick-release grip head 1 includes a grip 101, which is cylindrical. Two grip base plates 103 are fixed at the lower part of the grip 101. A grip positioning plate 105 is fixed between the two grip base plates 103. The two ends of the grip positioning plate 105 are fixedly connected to the grip base plates 103 to improve the stability of the two grip base plates 103.

[0044] The lower part of the grip base plate 103 and the grip positioning plate 105 pass through the clearance opening 301. The grip positioning plate 105 has a through hole for the grip fixing bolt 106 to pass through and be fixedly connected to the grinding part base plate 2. The grip base plate 103 is provided with a first lock head 102 and a second lock head 104 at both ends. The first lock head 102 and the second lock head 104 have the same structure and are both extensions of the grip base plate 103 that are longer than the clearance opening 301.

[0045] The first lock head 102 and the second lock head 104 are pressed onto the clamping plate body 302, thereby completing the installation of the handle and the fixing of the grinding part clamping plate 3.

[0046] The rotating shaft 304 has limit holes 305 at both ends, which are round holes, so that the rotating shaft 304 can rotate easily. The mounting base 201 is equipped with clamping plate limit bolts 206, which are fixedly connected to the mounting base 201 by threads. The end of the clamping plate limit bolts 206 is provided with a smooth section, which passes into the limit hole 305, so that the clamping plate body 302 can rotate around the axis of the rotating shaft 304, and the rotating shaft 304 will not come off the mounting base 201.

[0047] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A portable concrete surface polishing device, characterized in that, Including polishing piece bottom plate (2), polishing piece clamping plate (3) and handle quick release head (1), the polishing piece bottom plate (2) is provided with mounting seat (201), the mounting seat (201) is provided with arc-shaped limiting plate (205), the mounting seat (201) is rotatably installed with the rotation axis (304) of polishing piece clamping plate (3), the rotation axis (304) and arc-shaped limiting plate (205) form first clamping gap (4), the rotation axis (304) is provided with clamping groove (306) along the length direction, and the clamping of the first side of abrasive paper is completed by the cooperation of clamping groove (306) and first clamping gap (4), the other side of polishing piece clamping plate (3) is attached to polishing piece bottom plate (2) to complete the clamping of the second side of abrasive paper, the handle quick release head (1) is fixedly installed with polishing piece bottom plate (2) on the opening (301) of polishing piece clamping plate (3), and the handle quick release head (1) is provided with limiting piece to limit the rotation of polishing piece clamping plate (3).

2. The portable concrete surface polishing apparatus of claim 1, wherein, The polishing piece bottom plate (2) includes bottom plate main body (202), which is provided in a rectangular shape, and the bottom plate main body (202) is further provided with fixing hole (204) for installing and fixing the handle quick release head (1).

3. The portable concrete surface polishing apparatus of claim 2, wherein, One side of the bottom plate main body (202) is provided with mounting seat (201), and the other side is provided with folding edge (207), and the first pressing surface (203) is arranged inwardly on the folding edge (207), the polishing piece clamping plate (3) includes clamping plate main body (302), one side of the clamping plate main body (302) is provided with rotation axis (304), and the other side is provided with second pressing surface (303).

4. The portable concrete surface polishing apparatus of claim 1, wherein, The rotation axis (304) is provided with limiting hole (305) at both ends, the clamping plate limiting bolt (206) is installed on the mounting seat (201), the clamping plate limiting bolt (206) penetrates into the limiting hole (305), so that the clamping plate main body (302) can rotate around the rotation axis (304) as the rotation axis (304).

5. The portable concrete surface polishing apparatus of claim 4, wherein, The clamping groove (306) is in the shape of an expanding mouth with a wide outer part and a narrow inner part.

6. The portable concrete surface polishing apparatus of claim 2, wherein, The handle quick release head (1) includes handle (101), two handle bottom plates (103) are fixedly arranged on the lower part of the handle (101), the handle positioning plate (105) is fixedly arranged between the two handle bottom plates (103), the handle bottom plates (103) and the handle positioning plate (105) penetrate through the opening (301), the handle positioning plate (105) is provided with through hole for fixing the handle fixing bolt (106) to be fixedly connected with the polishing piece bottom plate (2).

7. The portable concrete surface polishing apparatus of claim 6, wherein, The handle bottom plates (103) are provided with first lock head (102) and second lock head (104) at both ends, and the first lock head (102) and the second lock head (104) are pressed on the clamping plate main body (302), so as to complete the installation of the handle and the fixation of the polishing piece clamping plate (3).

8. The portable concrete surface polishing apparatus of claim 7, wherein, The handle (101) is a cylindrical structural member.

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