Bimetal combined tapper

Abstract

The utility model relates to the technical field of tappers and discloses a bimetal combined tapper which comprises a supporting handle, tapping sawteeth and a positioning drill bit, chip removal holes and heat dissipation holes are formed in the tapping sawteeth, the tapping sawteeth are connected to the lower end of the supporting handle in a clamped mode, a protrusion is arranged on the supporting handle, the outer side of the protrusion is connected with a rotating sleeve through threads, and the positioning drill bit is connected with the rotating sleeve. The lower end of the rotating sleeve is rotationally connected with a limiting sleeve through a bearing, a first limiting pin and a second limiting pin are sequentially arranged on the inner side of the limiting sleeve from top to bottom, and a clamping sleeve is clamped below the trepanning sawteeth and inserted into the supporting handle. The perforating saw teeth and the positioning drill bit can be conveniently detached at the same time, and the fixing stability of the perforating saw teeth and the positioning drill bit can be guaranteed while the replacing efficiency of the perforating saw teeth and the positioning drill bit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hole openers, in particular to a bimetallic combined hole opener. Background Art

[0002] The hole opener is installed on an ordinary electric drill, and can easily cut round holes, square holes, triangular holes, straight lines, and curves on any curved surface such as the flat surface, spherical surface, etc. of various plates such as copper, iron, stainless steel, and plexiglass. It is flexible, convenient, safe, and widely used. According to the material classification: bimetallic hole opener, carbide hole opener, diamond hole opener, different materials are used to cut different materials. The most commonly used is the bimetallic hole opener. Carbide is recommended for harder metal materials, and diamond hole openers are recommended for glass, carbon fiber, ceramics and other materials that are easy to break.

[0003] The existing connection method between the support handle and the drill bit and the hole-opening saw teeth is mostly threaded connection. After long-term use, the thread is stripped, and the drill bit and the hole-opening saw teeth are inconvenient to remove from the support handle, resulting in low hole-opening efficiency and poor practicality. It is difficult to ensure the hole-opening processing accuracy of the workpiece. In view of this, we propose a bimetallic combination hole opener. Utility Model Content

[0004] The purpose of the utility model is to provide a bimetallic combination hole opener to solve the problem that the existing connection method between the support handle and the drill bit and the hole opening saw teeth proposed in the above background technology is mostly threaded connection. After long-term use, the threads are stripped, and the drill bit and the hole opening saw teeth are inconvenient to remove from the support handle, resulting in low hole opening efficiency, poor practicality, and difficulty in ensuring the hole opening processing accuracy of the workpiece.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bimetallic combination hole opener, comprising a support handle, a hole opening saw tooth and a positioning drill bit, the hole opening saw tooth being provided with a chip removal hole and a heat dissipation hole, the hole opening saw tooth being clamped at the lower end of the support handle, the support handle being provided with a protrusion, the outer side of the protrusion being connected with a rotating sleeve by a thread, the lower end of the rotating sleeve being rotatably connected to a limiting sleeve by a bearing, the inner side of the limiting sleeve being provided with a limit pin 1 and a limit pin 2 in sequence from top to bottom, the lower side of the limit sleeve being clamped with a clamping sleeve, the clamping sleeve being inserted into the support handle, the clamping sleeve and the positioning drill bit being respectively provided with a positioning hole 2 and a positioning hole 1 in an annular shape, the support handle being provided with a limit hole 2 and a limit hole 1 corresponding to the inner and outer sides of the positioning hole 2 and the positioning hole 1, the limit pin 1 and the limit pin 2 being inserted into the corresponding positioning hole 1 and the positioning hole 2, and the outer ends of the limit pin 1 and the limit pin 2 are provided with downwardly inclined surfaces.

[0006] Preferably, the limiting pin 1 and the limiting pin 2 pass through the corresponding limiting hole 2 and the limiting hole 1, and the limiting hole 2 and the limiting hole 1 are both through grooves.

[0007] Preferably, the opening serrations are arranged between the support handle and the clamping sleeve.

[0008] Preferably, a U-shaped groove is provided in a ring shape on the inner side of the opening saw tooth, and the U-shaped groove is communicated with the inside of the opening saw tooth.

[0009] Preferably, a plug-in block is provided in a ring shape on the card sleeve, and the plug-in block is movably plugged into the U-shaped card slot.

[0010] Preferably, the center lines of the limit pin 1 and the limit pin 2 are parallel to each other, and the length of the limit pin 1 is longer than the length of the limit pin 2.

[0011] Preferably, the clamping sleeve is provided with an inserting hole for inserting a positioning drill bit, and the positioning drill bit passes through the clamping sleeve.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. This bimetallic combination hole opener is connected to a rotating sleeve by threading on the support handle, and a limiting sleeve is connected to the outer side of the rotating sleeve through a bearing. When replacing the hole-opening saw teeth and the positioning drill bit, it is only necessary to rotate the rotating sleeve in the opposite direction, so that the rotating sleeve drives the limiting sleeve to move from bottom to top along the center line direction of the support handle, so that the limiting sleeve is freed from the restriction of the limiting pin 1 and the limiting pin 2, and the limiting pin 1 and the limiting pin 2 are taken outward, so that the hole-opening saw teeth and the positioning drill bit can be quickly removed from the support handle for replacement; the hole-opening saw teeth and the positioning drill bit are disassembled at the same time, which improves the replacement efficiency of the hole-opening saw teeth and the positioning drill bit, and can also ensure the fixing stability of the hole-opening saw teeth and the positioning drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the new structure of this utility model;

[0015] Figure 2 This is a schematic diagram of a half-section structure of the utility model (the spring is not shown);

[0016] Figure 3 It is a cross-sectional schematic diagram of the support handle of the utility model;

[0017] Figure 4 This is a schematic diagram of the drill bit structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the connection between the limit sleeve and the rotating sleeve of the utility model;

[0019] Figure 6 It is a schematic diagram of a half-section structure of the clamping sleeve of the utility model.

[0020] In the figure: 1. support handle; 11. protrusion; 12. limit hole one; 13. limit hole two; 2. hole opening serration; 21. chip removal hole; 22. heat dissipation hole; 23. U-shaped slot; 3. positioning drill bit; 31. positioning hole one; 4. rotating sleeve; 5. limit sleeve; 6. limit pin one; 7. limit pin two; 8. snap sleeve; 81. positioning hole two; 82. plug-in hole; 83. plug-in block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example: See Figure 1-6 The utility model provides a technical solution: a bimetallic combined hole opener, which is mainly aimed at the existing connection method between the support handle and the drill bit and the hole opening saw teeth, which is mostly threaded connection. After long-term use, the thread is slipped, and the drill bit and the hole opening saw teeth are not convenient to remove from the support handle, resulting in low hole opening efficiency and poor practicality. It is difficult to ensure the hole opening processing accuracy of the workpiece. The specific scheme is as follows: It includes a support handle 1, a hole opening saw tooth 2 and a positioning drill bit 3. The hole opening saw tooth 2 is provided with a chip removal hole 21 and a heat dissipation hole 22. The chip removal hole 21 can facilitate the discharge of waste chips during the hole opening process, and the heat dissipation hole 22 can facilitate ventilation and heat dissipation during the hole opening process.

[0023] See also Figure 1 and Figure 2 The opening serration 2 is clamped at the lower end of the support handle 1. The support handle 1 is provided with a protrusion 11, which is processed integrally with the support handle 1. A rotating sleeve 4 is connected to the outer side of the protrusion 11 by a thread, and the lower end of the rotating sleeve 4 is rotatably connected to the limiting sleeve 5 by a bearing. After providing a rotational driving force to the rotating sleeve 4, the rotating sleeve 4 can drive the limiting sleeve 5 to move along the center line direction of the support handle 1.

[0024] Furthermore, a limit pin 1 6 and a limit pin 2 7 are sequentially arranged from top to bottom inside the limit sleeve 5, wherein the limit pin 1 6 and the limit pin 2 7 are both in contact with the limit sleeve 5. When the limit sleeve 5 moves downward, the limit pin 1 6 and the limit pin 2 7 can move from outside to inside at the same time, so that the limit pin 1 6 and the limit pin 2 7 can limit the corresponding components.

[0025] Furthermore, a clamping sleeve 8 is clamped under the hole-opening sawtooth 2, and the clamping sleeve 8 is plugged into the support handle 1, and the hole-opening sawtooth 2 is arranged between the support handle 1 and the clamping sleeve 8. The clamping sleeve 8 is provided with a plugging hole 82 for plugging the positioning drill bit 3, and the positioning drill bit 3 passes through the clamping sleeve 8. The clamping sleeve 8 can make the hole-opening sawtooth 2 and the support handle 1 stably fixed.

[0026] Among them, the clamping sleeve 8 and the positioning drill bit 3 are respectively provided with a second positioning hole 81 and a first positioning hole 31 in a ring shape, and the support handle 1 is provided with a second limiting hole 13 and a first limiting hole 12 corresponding to the inside and outside of the second positioning hole 81 and the first positioning hole 31, and the limiting pin 16 and the limiting pin 27 are inserted into the corresponding positioning hole 31 and the second positioning hole 81, and the outer ends of the limiting pin 16 and the limiting pin 27 are provided with downward inclined surfaces. After providing a rotational driving force to the rotating sleeve 4, the rotating sleeve 4 can drive the limiting sleeve 5 to move along the center line direction of the support handle 1, and the limiting sleeve 5 can move downward, and the limiting pin 16 and the limiting pin 27 can move from the outside to the inside at the same time, so that the limiting pin 16 and the limiting pin 27 can effectively limit the positioning drill bit 3 and the clamping sleeve 8, thereby further improving the fixing stability of the positioning drill bit 3, the hole-opening sawtooth 2 and the support handle 1.

[0027] Furthermore, the center lines of the limit pin 1 6 and the limit pin 2 7 are parallel to each other, and the length of the limit pin 1 6 is longer than the length of the limit pin 2 7. The limit pin 1 6 and the limit pin 2 7 pass through the corresponding limit hole 2 13 and the limit hole 1 12, and the limit hole 2 13 and the limit hole 1 12 are both through grooves.

[0028] It is worth noting that a U-shaped slot 23 is provided in an annular shape on the inner side of the hole-opening sawtooth 2, and the U-shaped slot 23 is communicated with the inside of the hole-opening sawtooth 2. A plug-in block 83 is provided in an annular shape on the clamping sleeve 8, and the plug-in block 83 is movably plugged into the inside of the U-shaped slot 23. When the plug-in block 83 is inserted into the inside of the U-shaped slot 23, the relative rotation of the hole-opening sawtooth 2 and the clamping sleeve 8 can be limited, and the support handle 1 and the clamping sleeve 8 are connected by the limit pin 27, which can limit the relative rotation of the clamping sleeve 8 and the support handle 1. Through the above connection, the fixing stability of the positioning drill 3, the hole-opening sawtooth 2 and the support handle 1 can be further improved.

[0029] Working principle: When replacing the hole opening saw teeth 2 and the positioning drill bit 3 of this bimetallic combination hole opener, it is only necessary to rotate the rotating sleeve 4 in the opposite direction, so that the rotating sleeve 4 drives the limiting sleeve 5 to move from bottom to top along the center line direction of the support handle 1, so that the limiting sleeve 5 is freed from the restriction of the limiting pin 1 6 and the limiting pin 2 7. The limiting pin 1 6 and the limiting pin 2 7 are taken outward, and the hole opening saw teeth 2 and the positioning drill bit 3 can be quickly removed from the support handle 1 for replacement; the hole opening saw teeth 2 and the positioning drill bit 3 are disassembled at the same time, which improves the replacement efficiency of the hole opening saw teeth 2 and the positioning drill bit 3 while ensuring the fixing stability of the hole opening saw teeth 2 and the positioning drill bit 3.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bimetallic combined hole opener, comprising a support handle (1), a hole opening saw tooth (2) and a positioning drill bit (3), wherein the hole opening saw tooth (2) is provided with a chip removal hole (21) and a heat dissipation hole (22), and characterized in that: The opening saw teeth (2) are clamped to the lower end of the support handle (1); a protrusion (11) is provided on the support handle (1); a rotating sleeve (4) is connected to the outer side of the protrusion (11) via a thread; the lower end of the rotating sleeve (4) is rotatably connected to a limit sleeve (5) via a bearing; a limit pin 1 (6) and a limit pin 2 (7) are provided on the inner side of the limit sleeve (5) in sequence from top to bottom; a clamping sleeve (8) is clamped below the opening saw teeth (2); the clamping sleeve (8) is plugged onto the support handle (1); The clamping sleeve (8) and the positioning drill bit (3) are respectively provided with a second positioning hole (81) and a first positioning hole (31) in the shape of a ring. The support handle (1) is provided with a second limiting hole (13) and a first limiting hole (12) corresponding to the inside and outside of the second positioning hole (81) and the first positioning hole (31). The first limiting pin (6) and the second limiting pin (7) are inserted into the corresponding first positioning hole (31) and the second positioning hole (81), and the outer ends of the first limiting pin (6) and the second limiting pin (7) are provided with downwardly inclined surfaces.

2. A bimetallic combined hole opener according to claim 1, characterized in that: The limiting pin 1 (6) and the limiting pin 2 (7) pass through the corresponding limiting hole 2 (13) and the limiting hole 1 (12), and the limiting hole 2 (13) and the limiting hole 1 (12) are both through grooves.

3. A bimetallic combined hole opener according to claim 1, characterized in that: The hole-opening saw teeth (2) are arranged between the support handle (1) and the clamping sleeve (8).

4. The bimetallic combined hole opener according to claim 1, characterized in that: A U-shaped slot (23) is provided in the form of a ring inside the opening saw tooth (2), and the U-shaped slot (23) is communicated with the inside of the opening saw tooth (2).

5. A bimetallic combined hole opener according to claim 4, characterized in that: The card sleeve (8) is provided with a plug-in block (83) in the shape of a ring, and the plug-in block (83) is movably plugged into the interior of the U-shaped card slot (23).

6. The bimetallic combined hole opener according to claim 1, characterized in that: The center lines of the limit pin 1 (6) and the limit pin 2 (7) are parallel to each other, and the length of the limit pin 1 (6) is longer than the length of the limit pin 2 (7).

7. The bimetallic combined hole opener according to claim 1, characterized in that: The clamping sleeve (8) is provided with an insertion hole (82) for inserting the positioning drill bit (3), and the positioning drill bit (3) passes through the clamping sleeve (8).

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