Wall tapper with drill bit convenient to replace

Abstract

The utility model belongs to the technical field of wall tapping tools, in particular to a wall tapper convenient for replacing a drill bit, which comprises a central drill bit and a circular hole saw, and further comprises a regular hexagonal fixing sleeve and a locking assembly, and the locking assembly comprises a locking pressing block, a fixing frame and a threaded column; a regular hexagonal fixing sleeve is fixed to the center drill bit, a regular hexagonal through hole allowing the regular hexagonal fixing sleeve to penetrate through is formed in the circular hole saw, a plurality of fixing frames are fixed to the circular hole saw at equal intervals in the circumferential direction, and threaded columns are installed on the fixing frames in a threaded screwing mode. According to the wall tapper, the regular hexagonal fixing sleeve penetrates through the regular hexagonal through hole to position the installation position of the center drill bit, the threaded column is rotated, the threaded column pushes the locking pressing block to be embedded into the locking groove to be locked under the screwing effect of threads, and the installation stability of the center drill bit is greatly improved; and meanwhile, the center drill bit is easy to disassemble and replace, and the use convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to wall hole tool technical field, concretely relates to a wall hole device of drill bit convenient to replace. BACKGROUND

[0002] The hole opener is also called a hole saw or a hole cutter, which is a sawing type circular saw for processing a circular hole. The hole opener can be used for hole cutting on materials such as metal, wood, plastic, glass, and stone. The hole opener is widely used because of its simple and flexible operation, portability, and safety. During the construction and decoration of a building, it may be necessary to cut a hole in the wall of the building for installing a wire box, laying a cable, or laying a pipeline. In this case, the wall hole opener is used to cut a hole in the wall.

[0003] In the prior art, a Chinese utility model patent with the authorization announcement number CN219665216U discloses a hole opener with a drill bit that is easy to disassemble. The hole opener includes a cutter body and a drill bit. A limiting column is arranged on the cutter body. The drill bit is arranged in the cutter body and the limiting column. A fixed block is arranged on the outer side wall of the limiting column. A torsional spring is placed in the fixed block. A gap is formed in the side wall of the fixed block to allow the one side of the torsional spring to extend out. A fixed rod is connected to the one side of the torsional spring that extends out of the gap. A through hole is formed in the side of the limiting column to allow the fixed rod to extend into the through hole. A limiting hole is formed in the side wall of the drill bit to allow the fixed rod to extend into the limiting hole.

[0004] The hole opener of the foregoing scheme uses the elastic force of the torsional spring to insert the fixed rod into the limiting hole to achieve the installation of the drill bit. Although the hole opener has the advantages of easy installation and disassembly and replacement, in actual use, the drill bit and the cutter body need to be rotated at a high speed to achieve hole cutting. Due to the centrifugal force and the reverse torsional force generated when the hole opener contacts the wall, the torsional spring is easily deformed, which affects the stability of the installation of the drill bit and the cutter body and easily causes shaking or even falling off.

[0005] To solve the above problems, the present application provides a wall hole opener with a drill bit that is easy to replace. UTILITY MODEL CONTENTS

[0006] To solve the above problems in the prior art, the utility model provides a wall hole opener with a drill bit that is easy to replace, which has the characteristics of convenient use, easy disassembly and replacement, and high stability.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: a wall hole opener with a drill bit that is easy to replace, which includes a center drill bit and a circular hole cutter, further includes a regular hexagonal fixing sleeve and a locking assembly, and the locking assembly includes a locking pressing block, a fixing frame, and a threaded column.

[0008] The hexagonal fixing sleeve is fixed on the center drill, a hexagonal through hole is formed on the circular hole saw for the hexagonal fixing sleeve to penetrate, a plurality of the fixing frames are fixed on the circular hole saw at equal intervals in the circumferential direction, the threaded column is installed on the fixing frame in a threaded screwing mode, the end of the threaded column is rotatably connected with the locking block through a bearing after penetrating the fixing frame, and a locking groove is formed on the outer wall of the hexagonal fixing sleeve for the locking block to embed.

[0009] As a preferred technical scheme of the utility model, a knob is fixed on the end of the threaded column away from the locking block.

[0010] As a preferred technical scheme of the utility model, a guide column is fixed on the locking block and penetrates the fixing frame.

[0011] As a preferred technical scheme of the utility model, a machine screw is further included, and the fixing frame is fixed on the circular hole saw through the machine screw.

[0012] As a preferred technical scheme of the utility model, the bottom surface of the locking block and the inner bottom surface of the locking groove are matching inclined surfaces.

[0013] As a preferred technical scheme of the utility model, a limiting disc is fixed on the end of the hexagonal fixing sleeve, a plurality of positioning rods are fixed on the limiting disc and are distributed at equal intervals in the circumferential direction, a positioning hole is formed on the circular hole saw for the positioning rods to penetrate, and a rubber bushing is adhesively fixed on the limiting disc.

[0014] Compared with the prior art, the wall hole opener has the advantages that the installation position of the center drill is positioned through the hexagonal fixing sleeve penetrating the hexagonal through hole, the threaded column is rotated to push the locking block to embed in the locking groove for locking under the threaded screwing effect, the stability of the center drill installation is greatly improved, the center drill is easy to disassemble and replace, and the convenience of use is improved.

[0015] Other additional advantages and beneficial effects of the present application will be partially given in the following description, partially will become obvious from the following description, or will be known by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments of the present application, and do not constitute a limitation of the present application. In the drawings:

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 For the locking assembly of the utility model Figure 1 enlarged structural schematic view;

[0019] Figure 3 For the cross section structure schematic view of the utility model;

[0020] In the figure: 1, center drill; 2, circular hole saw; 3, regular hexagonal fixed sleeve; 4, regular hexagonal through hole; 5, locking assembly; 6, positioning rod; 7, positioning hole; 8, locking groove; 9, locking pressing block; 10, fixed frame; 11, threaded column; 12, knob; 13, guide column; 14, machine screw; 15, limit disc; 16, rubber bushing. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-3 , the utility model provides the following technical scheme: a wall hole opener convenient for replacing drill bit, including center drill 1 and circular hole saw 2, still including regular hexagonal fixed sleeve 3 and locking assembly 5, and locking assembly 5 includes locking pressing block 9, fixed frame 10 and threaded column 11;

[0023] As shown in the drawings Figure 1 and the drawings Figure 2 , in the embodiment, the regular hexagonal fixed sleeve 3 is fixed on the center drill 1, the regular hexagonal through hole 4 for the regular hexagonal fixed sleeve 3 to penetrate is formed on the circular hole saw 2, a plurality of fixed frames 10 are fixed on the circular hole saw 2 along the circumferential direction at equal intervals, the threaded column 11 is installed on the fixed frame 10 by screwing, and the end of the threaded column 11 is rotatably connected with the locking pressing block 9 by using bearing after penetrating the fixed frame 10, and the locking groove 8 for the locking pressing block 9 to embed is formed on the outer wall of the regular hexagonal fixed sleeve 3, therefore, when installing the center drill 1, the regular hexagonal fixed sleeve 3 on the center drill 1 is positioned by penetrating the regular hexagonal through hole 4 on the circular hole saw 2, at this time, the locking groove 8 and the locking pressing block 9 correspond, the threaded column 11 is rotated, the locking pressing block 9 is moved under the action of screwing, until the locking pressing block 9 is embedded in the locking groove 8, and the regular hexagonal fixed sleeve 3 is pressed tightly, the locking of the center drill 1 is realized, the stability of the installation of the center drill 1 is greatly improved, and the center drill 1 is also easy to disassemble and replace, the convenience of use is improved.

[0024] As shown in the drawingsFigure 1 and attached Figure 2 As shown, as an optional embodiment, in this embodiment, a knob 12 is fixed at the end of the threaded post 11 away from the locking block 9, so that the threaded post 11 can be easily rotated using the knob 12.

[0025] From the appendix Figure 1 and attached Figure 2 As shown, as an optional embodiment, in this embodiment, a guide post 13 that penetrates the fixing frame 10 is fixed on the locking block 9 to guide the locking block 9 and improve the stability of the locking block 9.

[0026] From the appendix Figure 1 and attached Figure 2 As shown, as an optional embodiment, this embodiment also includes a grommet screw 14. The fixing bracket 10 is fixed to the circular hole saw 2 using the grommet screw 14, which facilitates the installation of the fixing bracket 10 and provides high installation stability.

[0027] From the appendix Figure 1 and attached Figure 2 As shown, in an optional embodiment, the bottom surface of the locking block 9 and the inner bottom surface of the locking groove 8 are matched with inclined surfaces. Therefore, when the locking block 9 presses the hexagonal fixing sleeve 3, the presence of the inclined surface will generate a component force, causing the central drill bit 1 to move towards the rear, further improving the stability of the installation of the central drill bit 1 and the circular hole saw 2.

[0028] From the appendix Figure 1 and attached Figure 3 As shown, in an optional embodiment, a limiting plate 15 is fixed to the end of the hexagonal fixing sleeve 3. Multiple positioning rods 6 are fixed on the limiting plate 15 at equal intervals along the circumferential direction. A positioning hole 7 is provided on the circular hole saw 2 for the positioning rods 6 to pass through. A rubber bushing 16 is glued and fixed on the limiting plate 15. The positioning rods 6 passing through the positioning hole 7 can further position the installation of the center drill bit 1 and improve stability. With the presence of the rubber bushing 16, when the threaded column 11 is tightened, the rubber bushing 16 will be in a compressed state and have a certain reverse elastic force, which can further improve the stability of the center drill bit 1. At the same time, the rubber bushing 16 is flexible, which can improve safety and reduce wear.

[0029] The working principle and usage process of this utility model: When installing the central drill bit 1, the hexagonal fixing sleeve 3 on the central drill bit 1 passes through the hexagonal through hole 4 on the circular hole saw 2 for positioning. At this time, the locking groove 8 and the locking pressure block 9 correspond. Rotating the threaded column 11 causes the threaded column 11 to push the locking pressure block 9 to move under the action of threaded rotation until the locking pressure block 9 is embedded in the locking groove 8 and presses the hexagonal fixing sleeve 3, thereby locking the central drill bit 1. This greatly improves the stability of the installation of the central drill bit 1 and also makes it easy to disassemble and replace the central drill bit 1, improving the convenience of use.

[0030] The bottom surface of the locking block 9 and the inner bottom surface of the locking groove 8 are matching slopes. Therefore, when the locking block 9 presses the hexagonal fixing sleeve 3, the presence of the slope will generate a component force, causing the center drill bit 1 to move towards the rear, further improving the stability of the installation of the center drill bit 1 and the circular hole saw 2.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wall hole opener for easy drill bit replacement, comprising a center drill bit (1) and a circular hole saw (2), characterized in that: It also includes a regular hexagonal fixing sleeve (3) and a locking assembly (5), wherein the locking assembly (5) includes a locking block (9), a fixing bracket (10) and a threaded post (11); The hexagonal fixing sleeve (3) is fixed on the central drill bit (1). A hexagonal through hole (4) is provided on the circular hole saw (2) for the hexagonal fixing sleeve (3) to pass through. Multiple fixing brackets (10) are fixed on the circular hole saw (2) at equal intervals along the circumferential direction. The threaded column (11) is installed on the fixing bracket (10) by thread engagement. The end of the threaded column (11) passes through the fixing bracket (10) and is rotatably connected to the locking block (9) by bearing. A locking groove (8) is provided on the outer wall of the hexagonal fixing sleeve (3) for the locking block (9) to be embedded.

2. The wall hole opener for easy drill bit replacement according to claim 1, characterized in that: A knob (12) is fixed at the end of the threaded post (11) away from the locking block (9).

3. A wall hole opener for easy drill bit replacement according to claim 1, characterized in that: A guide post (13) is fixed on the locking block (9) and passes through the fixing frame (10).

4. A wall hole opener for easy drill bit replacement according to claim 1, characterized in that: It also includes a grommet screw (14), the mounting bracket (10) is fixed to the circular hole saw (2) by means of the grommet screw (14).

5. A wall hole opener for easy drill bit replacement according to claim 1, characterized in that: The bottom surface of the locking block (9) and the inner bottom surface of the locking groove (8) are matching slopes.

6. A wall hole opener for easy drill bit replacement according to claim 1, characterized in that: A limiting plate (15) is fixed at the end of the hexagonal fixing sleeve (3). Multiple positioning rods (6) are fixed on the limiting plate (15) at equal intervals along the circumferential direction. A positioning hole (7) is opened on the circular hole saw (2) for the positioning rods (6) to pass through. A rubber bushing (16) is glued and fixed on the limiting plate (15).

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