Hole opener

Abstract

The utility model discloses a tapper which comprises a tapping cover, a connecting shaft is installed in the middle of the top end of the tapping cover, a drill bit is fixed to the bottom end of the tapping cover, a reset mechanism is arranged in the tapping cover, and the reset mechanism comprises a supporting frame corresponding to the axis of the tapping cover. The punching device has the beneficial effects that by arranging the reset mechanism and the extrusion mechanism, in the punching process, a cut plate is located in the punching cover and extrudes a supporting frame in the reset mechanism, the supporting frame is stressed to drive a guide rod to move upwards along the punching cover, a reset spring is extruded in the moving process, and the extrusion mechanism is made to contract; when a cut plate is clamped in the trepanning cover, the cut plate can be pushed out through resilience force of the reset spring and the extrusion mechanism, and when the cut plate is too tightly connected with the trepanning cover, a worker only needs to press the guide rod, so that the guide rod drives the supporting frame to downwards extrude the cut plate, and the cut plate can be separated from the trepanning cover. The use is convenient.

Description

Technical Field

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

[0002] Diamond is a mineral composed of carbon elements and is the hardest substance in nature. It has many important industrial uses, such as fine grinding materials, high-hard cutting tools, various drill bits, wire drawing dies, and is also used as components of many precision instruments. It is a substance with excellent properties such as super hardness, wear resistance, heat sensitivity, heat conduction, semiconductor, and light transmission.

[0003] Due to its high hardness, diamond is mainly used in the industry to manufacture drilling probes and grinding tools. A diamond hole opener is a type of diamond tool. It is installed on an ordinary electric drill and can conveniently perform arbitrary cutting of round holes, square holes, triangular holes, straight lines, and curves on the flat surfaces, spherical surfaces, and other arbitrary curved surfaces of various plates such as copper, iron, stainless steel, and plexiglass.

[0004] During the use of the existing hole opener, the drill bit cuts the plate driven by the drill. When the cutting is completed and the opening cover completely penetrates the plate, since the size of the cut plate is the same as the inner diameter of the opening cover, the cut plate is easily stuck in the opening cover, and the distance between them is small, making it troublesome to separate them. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a hole opener that can quickly separate the cut plate and the opening cover and is convenient to use according to the current situation of the existing technology.

[0006] The utility model is realized through the following technical solutions: The utility model provides a hole opener, which includes an opening cover. A connecting shaft is installed in the middle of the top end of the opening cover. A drill bit is fixed at the bottom end of the opening cover. A reset mechanism is arranged inside the opening cover. The reset mechanism includes a support frame corresponding to the axis of the opening cover. The support frame is in a cross-shaped structure. Guide rods are symmetrically installed on both sides of the top end of the support frame, and the guide rods penetrate the top end of the opening cover. The guide rods extend to the outside of the opening cover and are slidably connected to the opening cover. A reset spring is connected between the support frame and the opening cover. The reset spring is located outside the guide rods. An extrusion mechanism is arranged at the top end inside the opening cover.

[0007] By adopting the above technical solution, during the hole-opening process, the cut plate is located within the hole-opening cover and presses against the support frame in the reset mechanism. The support frame drives the guide rod to move upward along the hole-opening cover under the force, compressing the reset spring during the movement and causing the extrusion mechanism to contract. When the cut plate gets stuck in the hole-opening cover, the cut plate can be pushed out by the resilience of the reset spring and the extrusion mechanism. When the cut plate is too tightly connected to the hole-opening cover, the operator only needs to press the guide rod, and the guide rod drives the support frame to press down on the cut plate to separate it from the hole-opening cover.

[0008] Further, there are two sets of the extrusion mechanisms, and the two sets of the extrusion mechanisms are symmetrically distributed. The extrusion mechanism includes a bottom plate and an extrusion spring.

[0009] By adopting the above technical solution, the support frame can be quickly reset through the extrusion mechanism.

[0010] Further, the bottom plate is slidably connected to the hole-opening cover, and one end of the bottom plate is located above the support frame.

[0011] By adopting the above technical solution, it is convenient for the bottom plate to contact the support frame.

[0012] Further, both ends of the extrusion spring are respectively connected to the bottom plate and the hole-opening cover, and the resilience of the extrusion spring is greater than that of the reset spring.

[0013] By adopting the above technical solution, the extrusion spring can be compressed after the bottom plate contacts the support frame, thereby increasing the reaction force.

[0014] Further, a positioning pin is installed in the middle of the bottom end of the support frame, and the bottom end of the positioning pin is located below the bottom end of the drill bit.

[0015] By adopting the above technical solution, the center of the hole can be positioned through the positioning pin during the hole-opening process.

[0016] Further, sliding blocks are fixed on both sides of the bottom plate, and sliding grooves that fit the sliding blocks are formed on the hole-opening cover.

[0017] By adopting the above technical solution, during the movement of the bottom plate, the sliding blocks can move along the hole-opening cover through the sliding grooves, thereby guiding the bottom plate.

[0018] Further, a plurality of chip removal grooves are equidistantly formed on the circumferential wall of the hole-opening cover, and a through hole corresponding to the guide rod is formed at the top end of the hole-opening cover.

[0019] By adopting the above technical solution, it is convenient for the waste chips generated during the hole-opening process to be discharged from the hole-opening cover through the chip discharge groove.

[0020] Furthermore, a plurality of friction grooves are uniformly formed on the peripheral wall of the drill bit.

[0021] By adopting the above technical solution, the friction force between the drill bit and the plate can be increased through the friction grooves during the hole-opening process, thereby improving the hole-opening efficiency.

[0022] The utility model has the following beneficial effects compared with the prior art:

[0023] By arranging a reset mechanism and an extrusion mechanism, during the hole-opening process of the utility model, the cut plate is located inside the hole-opening cover and presses the support frame in the reset mechanism. The support frame drives the guide rod to move upward along the hole-opening cover under the force, and the reset spring is compressed during the movement, and the extrusion mechanism is contracted. When the cut plate is stuck inside the hole-opening cover, the cut plate can be pushed out by the resilience of the reset spring and the extrusion mechanism. And when the cut plate is too tightly connected to the hole-opening cover, the staff only needs to press the guide rod, and the guide rod drives the support frame to press the cut plate downward to separate it from the hole-opening cover, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural view of a hole opener according to the utility model;

[0025] Figure 2 is a main sectional view of a hole opener according to the utility model;

[0026] Figure 3 is a schematic connection diagram of a reset mechanism and a positioning pin in a hole opener according to the utility model;

[0027] Figure 4 is a schematic connection diagram of an extrusion mechanism and a sliding block in a hole opener according to the utility model;

[0028] Figure 5 is a bottom view of a hole-opening cover in a hole opener according to the utility model.

[0029] The reference numerals are explained as follows:

[0030] 1. Hole-opening cover; 2. Connecting shaft; 3. Drill bit; 4. Reset mechanism; 401. Support frame; 402. Guide rod; 403. Reset spring; 5. Extrusion mechanism; 501. Bottom plate; 502. Extrusion spring; 6. Positioning pin; 7. Sliding block; 8. Chute; 9. Chip discharge groove; 10. Through hole; 11. Friction groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to make the objectives, technical solutions and advantages of the present utility model more clear and 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.

[0032] As Figures 1 - 3 shown, a hole opener in this embodiment includes a hole opening cover 1. A connecting shaft 2 is installed in the middle of the top end of the hole opening cover 1. The hole opening cover 1 is connected to an external drill through the connecting shaft 2. A drill bit 3 is fixed at the bottom end of the hole opening cover 1. The drill bit 3 is used for cutting a plate. A reset mechanism 4 is arranged in the hole opening cover 1. The reset mechanism 4 includes a support frame 401 corresponding to the axis of the hole opening cover 1. The support frame 401 is in a cross-shaped structure. Guide rods 402 are symmetrically installed on both sides of the top end of the support frame 401. The guide rods 402 can move along the hole opening cover 1 to guide the support frame 401. And the guide rods 402 penetrate through the top end of the hole opening cover 1. The guide rods 402 extend to the outside of the hole opening cover 1 and are slidably connected to the hole opening cover 1. A reset spring 403 is connected between the support frame 401 and the hole opening cover 1. The reset spring 403 can reset the support frame 401 and the guide rods 402. The reset spring 403 is located outside the guide rods 402. An extrusion mechanism 5 is arranged at the top end inside the hole opening cover 1.

[0033] As Figures 2 - 4 shown, there are two groups of extrusion mechanisms 5, and the two groups of extrusion mechanisms 5 are symmetrically distributed. The extrusion mechanism 5 includes a bottom plate 501 and an extrusion spring 502; the bottom plate 501 is slidably connected to the hole opening cover 1, which facilitates the bottom plate 501 to move under force and drives the extrusion spring 502 to contract during the movement. And one end of the bottom plate 501 is located above the support frame 401.

[0034] As Figures 2 - 4 shown, both ends of the extrusion spring 502 are respectively connected to the bottom plate 501 and the hole opening cover 1. And the resilience of the extrusion spring 502 is greater than the resilience of the reset spring 403, which can improve the resilience through the extrusion spring 502; a positioning pin 6 is installed in the middle of the bottom end of the support frame 401, which can position the center of the hole through the positioning pin 6 during the hole opening process. And the bottom end of the positioning pin 6 is located below the bottom end of the drill bit 3.

[0035] As Figure 2 、 Figure 4 and Figure 5As shown, sliding blocks 7 are fixed on both sides of the bottom plate 501, and a chute 8 that fits the sliding blocks 7 is provided on the opening cover 1. During the movement of the bottom plate 501, the sliding blocks 7 can move along the opening cover 1 through the chute 8, thereby guiding the bottom plate 501; a plurality of chip discharge grooves 9 are equidistantly arranged on the circumferential wall of the opening cover 1, and the waste chips generated during the opening process are discharged through the chip discharge grooves 9, and a through hole 10 is provided at the top of the opening cover 1 corresponding to the guide rod 402; a plurality of friction grooves 11 are uniformly formed on the circumferential wall of the drill bit 3, and the friction force between the drill bit 3 and the plate is increased through the friction grooves 11 during the opening process, thereby improving the opening efficiency.

[0036] The specific implementation process of this embodiment is as follows: The opening cover 1 is fixedly connected to an external drill through the connecting shaft 2. After the connection is completed, the staff aligns the positioning pin 6 with the opening center according to the opening requirements. After the alignment is completed, the drill drives the opening cover 1 to rotate. During the rotation, the staff presses the drill to make the drill bit 3 contact the plate, and the plate is rotationally cut by the drill bit 3. During the cutting process, the friction force between the drill bit 3 and the plate is increased through the friction grooves 11, thereby improving the opening efficiency, and the waste chips generated during the opening process are discharged through the chip discharge grooves 9;

[0037] At the same time, after the positioning pin 6 contacts the plate, it drives the support frame 401 in the reset mechanism 4 to move upward under force. As the opening depth increases, the support frame 401 will continue to move upward, driving the guide rod 402 to move upward along the through hole 10 on the opening cover 1, and at the same time compressing the reset spring 403. During the movement of the support frame 401, it contacts the bottom plate 501 in the extrusion mechanism 5. The bottom plate 501 is forced to move upward along the opening cover 1 through the sliding blocks 7 and the chute 8 and compress the extrusion spring 502. When the cut plate is stuck in the opening cover 1, the cut plate can be pushed out by the resilience of the reset spring 403 and the extrusion mechanism 5. When the cut plate is too tightly connected to the opening cover 1, the staff only needs to press the guide rod 402 to make the guide rod 402 drive the support frame 401 to press the cut plate downward to separate it from the opening cover 1, which is convenient to use.

[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 can 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 these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hole opener, characterized in that: It includes an opening cover (1), a connecting shaft (2) is installed in the middle of the top end of the opening cover (1), a drill bit (3) is fixed at the bottom end of the opening cover (1), a reset mechanism (4) is arranged in the opening cover (1), the reset mechanism (4) includes a support frame (401) corresponding to the axis of the opening cover (1), the support frame (401) is of a cross-shaped structure, guide rods (402) are symmetrically installed on both sides of the top end of the support frame (401), and the guide rods (402) penetrate through the top end of the opening cover (1), the guide rods (402) extend to the outside of the opening cover (1) and are slidably connected to the opening cover (1), a reset spring (403) is connected between the support frame (401) and the opening cover (1), the reset spring (403) is located outside the guide rods (402), and an extrusion mechanism (5) is arranged at the inner top end of the opening cover (1).

2. The hole opener according to claim 1, wherein: There are two groups of the extrusion mechanisms (5), and the two groups of the extrusion mechanisms (5) are symmetrically distributed. The extrusion mechanism (5) includes a bottom plate (501) and an extrusion spring (502).

3. The hole opener according to claim 2, wherein: The bottom plate (501) is slidably connected to the opening cover (1), and one end of the bottom plate (501) is located above the support frame (401).

4. The hole opener according to claim 3, characterized in that: Both ends of the extrusion spring (502) are connected to the bottom plate (501) and the opening cover (1) respectively, and the resilience of the extrusion spring (502) is greater than the resilience of the reset spring (403).

5. The hole opener according to claim 4, characterized in that: A positioning pin (6) is installed in the middle of the bottom end of the support frame (401), and the bottom end of the positioning pin (6) is located below the bottom end of the drill bit (3).

6. The hole opener according to claim 5, wherein: Sliding blocks (7) are fixed on both sides of the bottom plate (501), and sliding grooves (8) matching the sliding blocks (7) are formed on the opening cover (1).

7. The hole opener according to claim 6, wherein: A plurality of chip discharge grooves (9) are equidistantly formed on the peripheral wall of the opening cover (1), and through holes (10) corresponding to the guide rods (402) are formed at the top end of the opening cover (1).

8. The hole opener according to claim 7, characterized in that: A plurality of friction grooves (11) are uniformly formed on the peripheral wall of the drill bit (3).

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