Hole opener

Abstract

The utility model discloses a tapper which comprises a drilling barrel, drilling teeth are welded on the periphery of the bottom end of the drilling barrel at equal intervals, four chip removal holes are annularly formed in the positions, located on the upper sides of the drilling teeth, outside the drilling barrel, a threaded part is installed on the positions, located on the upper sides of the chip removal holes, outside the drilling barrel, and a material pushing heat dissipation mechanism is installed at the threaded part. The tapper has the advantages that the material pushing heat dissipation mechanism is installed on the drilling barrel, so that when the tapper works, heat dissipation fan blades on the material pushing heat dissipation mechanism rotate to blow air to the outer side of the drilling barrel, heat dissipation of the outer side of the drilling barrel is accelerated, the heat dissipation performance of the tapper during drilling is improved, and the service life of the tapper is prolonged. And meanwhile, after drilling, the shifting rod drives the threaded ring to continuously rotate along the threaded part to achieve downward movement of the linkage rod, so that when the linkage rod moves downwards, the cut materials clamped in the drilling barrel are pushed out by means of the material pushing plate, and rapid discharging and using of the tapper after drilling are facilitated.

Description

Technical Field

[0001] The utility model relates to the field of hole openers, and particularly relates to a hole opener. Background Art

[0002] A hole opener, also known as a hole saw, refers to a special circular saw for cutting circular holes in modern industry or engineering. It is simple and flexible to operate, easy to carry, safe, and has a wide range of uses. The hole opener (cutter) is installed on an ordinary electric drill, and it can conveniently cut circular holes, square holes, triangular holes, straight lines, curves, etc. on any curved surfaces such as the plane and spherical surface of various plates such as copper, iron, stainless steel, and plexiglass.

[0003] The current hole opener mainly consists of a drill barrel with a chip removal hole, drill teeth installed at the bottom end of the drill barrel, a centering drill rod installed in the middle of the drill barrel, and a connecting column installed in the middle of the top end of the drill barrel. Although this kind of hole opener can cooperate with an external electric drill to realize the drilling process of thin plates during use, during the drilling process, as the drill teeth continuously penetrate into the plate, the heat dissipation performance around the drill barrel will become worse. At the same time, the cut materials after drilling are easy to get stuck inside the drill barrel and are not easy to take out, thus making it inconvenient for the subsequent rapid use of the hole opener. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a hole opener that can actively blow air to accelerate the dissipation of heat around the drill hole while drilling, and at the same time can realize the convenient discharge of the cut materials from the drill barrel in a rotating pushing manner after drilling, aiming at the current situation of the prior art.

[0005] The utility model is realized through the following technical solutions: The utility model provides a hole opener, which includes a drill barrel. Drill teeth are welded at equal intervals on the periphery of the bottom end of the drill barrel. Four chip removal holes are annularly formed on the drill barrel outside the drill teeth at the upper side. A threaded part is installed on the drill barrel outside the chip removal holes at the upper side. A pushing and heat dissipating mechanism is installed at the threaded part. The pushing and heat dissipating mechanism includes a screw ring screwed and fixed with the threaded part, four push rods annularly installed outside the screw ring, heat dissipation fins installed outside the screw ring between adjacent two push rods, a rotating groove opened at the bottom end of the screw ring, a rotating ring installed in the rotating groove, a sliding ring installed at the bottom end of the rotating ring, four linkage rods annularly installed at the bottom end of the sliding ring, a pushing plate installed at the bottom end of the linkage rods, and a through hole opened in the middle of the pushing plate.

[0006] By adopting the above technical solution, when opening a hole in a thin plate, the heat dissipation fan blades on the material pushing and heat dissipation mechanism are rotated to blow air outside the drill cylinder, which can accelerate the dissipation of heat outside the drill cylinder. At the same time, after drilling, the push rod drives the spiral ring to continuously rotate along the threaded part to realize the downward movement of the linkage rod, so that while the linkage rod moves downward, the cut material stuck in the drill cylinder is pushed out by the material pushing plate, facilitating the quick discharge of materials after the hole opener opens the hole for use.

[0007] Furthermore, a centering drill rod is also welded in the middle of the inner top end of the drill cylinder, and the centering drill rod penetrates through the through hole.

[0008] By adopting the above technical solution, the centering drill rod can position the drill cylinder when opening a hole in a thin plate, ensuring the accuracy of the hole opening position on the plate.

[0009] Furthermore, a connecting column connected to an external electric drill is also installed in the middle of the outer top end of the drill cylinder, and the connecting column is welded to the drill cylinder.

[0010] By adopting the above technical solution, the reliable connection between the drill cylinder and the external electric drill can be realized through the connecting column, so as to realize the convenient rotation of the drill cylinder under the action of the external electric drill.

[0011] Furthermore, the chip removal hole penetrates through the side wall of the drill cylinder, and the linkage rod penetrates through the chip removal hole and is slidably connected to the chip removal hole.

[0012] By adopting the above technical solution, while the chip removal hole realizes the discharge of drill chips, it also facilitates the convenient heat dissipation of the drill cylinder.

[0013] Furthermore, the material pushing plate is slidably connected to the drill cylinder, and the material pushing plate is welded to the linkage rod.

[0014] By adopting the above technical solution, the material pushing plate will push out the cut material stuck in the drill cylinder under the push of the linkage rod.

[0015] Furthermore, a gap is reserved between the inner wall of the sliding ring and the outer wall of the drill cylinder, and the rotating ring is welded to the sliding ring.

[0016] By adopting the above technical solution, the convenient sliding of the sliding ring relative to the outer wall of the drill cylinder can be ensured.

[0017] Furthermore, the rotating ring is rotatably connected to the rotating groove, and the cross sections of both the rotating ring and the rotating groove are T-shaped structures.

[0018] By adopting the above technical solution, the cooperation between the rotating ring and the rotating groove can realize the convenient rotation of the sliding ring relative to the spiral ring.

[0019] Furthermore, the screw ring is screwed to the threaded portion, and the heat dissipation fan and the lever are welded to the screw ring.

[0020] By adopting the above technical solution, the screw ring can be easily moved downward along the threaded portion by moving the lever, so that the push plate can be pushed downward with the help of the slip ring and the linkage rod while the screw ring moves downward.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] The utility model installs a pushing and cooling mechanism on the drill tube, so that when the hole opener is working, the cooling fan fins on the pushing and cooling mechanism can be rotated to blow air to the outside of the drill tube, so as to accelerate the heat dissipation of the outside of the drill tube, so that the heat dissipation performance of the hole opener during drilling is improved. At the same time, after drilling, the lever drives the screw ring to rotate continuously along the threaded part to realize the downward movement of the linkage rod, so that the material stuck in the drill tube after cutting can be pushed out with the help of the pushing plate when the linkage rod moves downward, so as to facilitate the rapid discharge of the material by the hole opener after drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a hole opener described in the utility model;

[0024] Figure 2 It is a main cross-sectional view of a hole opener described in the utility model;

[0025] Figure 3 It is a top view of a hole opener described in the utility model;

[0026] Figure 4 The utility model is a kind of hole opener Figure 2 The enlarged view of point A in the middle;

[0027] Figure 5 The utility model is a schematic diagram of the structure of a push plate in a hole opener.

[0028] The following are the descriptions of the reference numerals:

[0029] 1. Connecting column; 2. Pushing and heat dissipation mechanism; 201. Screw ring; 202. Slip ring; 203. Linkage rod; 204. Pushing plate; 205. Pushing rod; 206. Heat dissipation fan; 207. Rotating groove; 208. Rotating ring; 209. Through hole; 3. Drill barrel; 4. Drill teeth; 5. Centering drill rod; 6. Chip removal hole; 7. Threaded part. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0031] As Figures 1 - 3 shown, a hole opener in this embodiment includes a drill barrel 3. Drill teeth 4 are welded at equal intervals on the periphery of the bottom end of the drill barrel 3. The drill teeth 4 can ensure the normal drilling of the drill barrel 3 on the plate. Four chip removal holes 6 are annularly formed on the drill barrel 3 above the drill teeth 4. The chip removal holes 6 facilitate the discharge of drill chips and also facilitate the heat dissipation of the drill barrel 3. A threaded portion 7 is installed on the drill barrel 3 above the chip removal holes 6. A material pushing and heat dissipation mechanism 2 is installed at the threaded portion 7. The material pushing and heat dissipation mechanism 2 includes a screw ring 201 screwed and fixed to the threaded portion 7, four lever rods 205 annularly installed outside the screw ring 201, heat dissipation fins 206 installed outside the screw ring 201 between adjacent two lever rods 205, a rotating groove 207 opened at the bottom end of the screw ring 201, a rotating ring 208 installed in the rotating groove 207, a sliding ring 202 installed at the bottom end of the rotating ring 208, four linkage rods 203 annularly installed at the bottom end of the sliding ring 202, a material pushing plate 204 installed at the bottom end of the linkage rod 203, and a through hole 209 opened in the middle of the material pushing plate 204.

[0032] Among them, when opening a hole in a thin plate, the heat dissipation fins 206 on the material pushing and heat dissipation mechanism 2 rotate to blow air on the outside of the drill barrel 3, which can accelerate the dissipation of heat on the outside of the drill barrel 3. At the same time, after drilling, the lever rods 205 drive the screw ring 201 to continuously rotate along the threaded portion 7 to realize the downward movement of the linkage rods 203, so that while the linkage rods 203 move downward, the material pushing plate 204 is used to push out the material stuck in the drill barrel 3 after cutting, facilitating the quick discharge of the material after the hole opener opens the hole.

[0033] As Figure 1 、 Figure 2 and Figure 5 shown, in this embodiment, a centering drill rod 5 is also welded in the middle of the inner top end of the drill barrel 3. The centering drill rod 5 passes through the through hole 209. The centering drill rod 5 can position the drill barrel 3 when opening a hole in a thin plate to ensure the accuracy of the hole opening position on the plate. A connecting column 1 connected to an external electric drill is also installed in the middle of the outer top end of the drill barrel 3. The connecting column 1 is welded to the drill barrel 3. With the help of the connecting column 1, the drill barrel 3 can be reliably connected to the external electric drill, so that the drill barrel 3 can be conveniently rotated under the action of the external electric drill. The chip removal holes 6 penetrate the side wall of the drill barrel 3. The linkage rods 203 penetrate the chip removal holes 6 and are slidably connected to the chip removal holes 6.

[0034] As Figures 1 - 2As shown, in this embodiment, the push plate 204 is slidably connected to the drill barrel 3, and the push plate 204 is welded to the linkage rod 203. The push plate 204 will push out the cut material stuck in the drill barrel 3 under the push of the linkage rod 203. A gap is reserved between the inner wall of the slip ring 202 and the outer wall of the drill barrel 3. The swivel 208 is welded to the slip ring 202, which can ensure the convenient sliding of the slip ring 202 relative to the outer wall of the drill barrel 3.

[0035] like Figures 2 - 4 As shown, in this embodiment, the rotating ring 208 is rotatably connected to the rotating groove 207, and the cross-sections of the rotating ring 208 and the rotating groove 207 are both T-shaped structures. The cooperation between the rotating ring 208 and the rotating groove 207 can realize the convenient rotation of the slip ring 202 relative to the screw ring 201.

[0036] like Figure 2 , Figure 3 and Figure 5 As shown, in this embodiment, the screw ring 201 is screwed to the threaded portion 7, and the heat dissipation fan 206 and the lever 205 are welded to the screw ring 201. By moving the lever 205, the screw ring 201 can be easily moved downward along the threaded portion 7, so that the push plate 204 can be pushed downward with the help of the slip ring 202 and the linkage rod 203 while the screw ring 201 moves downward.

[0037] The specific implementation process of this embodiment is as follows: when it is necessary to drill a hole in a thin plate, it is only necessary to connect the connecting column 1 to an external electric drill, and make the centering drill rod 5 face the center of the drilling position on the thin plate, and then it is only necessary to press the drill tube 3 onto the thin plate to drill a hole in the thin plate. During the drilling process, the heat dissipation fan 206 on the pusher heat dissipation mechanism 2 is rotated to blow air to the outside of the drill tube 3, which can accelerate the dissipation of heat on the outside of the drill tube 3. At the same time, after drilling, the lever 205 drives the screw ring 201 to rotate continuously along the threaded portion 7 to realize the downward movement of the linkage rod 203, so that when the linkage rod 203 moves downward, the material stuck in the drill tube 3 after cutting can be pushed out with the help of the push plate 204, which is convenient for the quick discharge of the hole opener after the hole is opened.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hole opener, characterized in that: It includes a drill pipe (3). Drill teeth (4) are welded at equal intervals around the periphery of the bottom end of the drill pipe (3). Four chip discharge holes (6) are annularly formed on the outside of the drill pipe (3) above the drill teeth (4). A threaded part (7) is installed on the outside of the drill pipe (3) above the chip discharge holes (6). A material pushing and heat dissipation mechanism (2) is installed at the threaded part (7). The material pushing and heat dissipation mechanism (2) includes a screw ring (201) screwed and fixed to the threaded part (7), four push rods (205) annularly installed on the outside of the screw ring (201), heat dissipation fins (206) installed on the outside of the screw ring (201) between adjacent two of the push rods (205), a rotating groove (207) formed at the bottom end of the screw ring (201), a rotating ring (208) installed in the rotating groove (207), a sliding ring (202) installed at the bottom end of the rotating ring (208), four linkage rods (203) annularly installed at the bottom end of the sliding ring (202), a material pushing plate (204) installed at the bottom end of the linkage rod (203), and a through hole (209) formed in the middle of the material pushing plate (204).

2. The hole opener according to claim 1, characterized in that: A centering drill rod (5) is also welded in the middle of the inner top end of the drill pipe (3), and the centering drill rod (5) penetrates through the through hole (209).

3. The hole opener according to claim 1, wherein: A connecting column (1) connected to an external electric drill is also installed in the middle of the outer top end of the drill pipe (3), and the connecting column (1) is welded to the drill pipe (3).

4. The hole opener according to claim 1, wherein: The chip discharge holes (6) penetrate through the side wall of the drill pipe (3), and the linkage rods (203) penetrate through the chip discharge holes (6) and are slidably connected to the chip discharge holes (6).

5. The hole opener according to claim 1, wherein: The material pushing plate (204) is slidably connected to the drill pipe (3), and the material pushing plate (204) is welded to the linkage rod (203).

6. The hole opener according to claim 1, characterized in that: A gap is reserved between the inner wall of the sliding ring (202) and the outer wall of the drill pipe (3), and the rotating ring (208) is welded to the sliding ring (202).

7. The hole opener according to claim 1, characterized in that: The rotating ring (208) is rotatably connected to the rotating groove (207), and the cross sections of both the rotating ring (208) and the rotating groove (207) are T-shaped structures.

8. The hole opener according to claim 1, characterized in that: The screw ring (201) is screwed to the threaded part (7), and both the heat dissipation fins (206) and the push rods (205) are welded to the screw ring (201).

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