Powerful tapper

Abstract

The invention relates to a powerful tapper, and relates to the technical field of tappers, the powerful tapper comprises a connecting rod and a drill bit fixed at the end of the connecting rod, a containing sinking groove is formed in the side face, away from the connecting rod, of the drill bit, and a positioning drill is fixedly arranged in the middle of the bottom side of the containing sinking groove; a plurality of first grinding drills are fixedly arranged on the bottom side of the containing sinking groove in a staggered mode, a plurality of second grinding drills are fixedly arranged on the side face, away from the connecting rod, of the end in a staggered mode, and a plurality of chip grooves communicating with the containing sinking groove are formed in the periphery of the drill bit in the spiral direction. In the application, when the tapper is applied, the end part of the connecting rod is mounted on driving equipment, then the corresponding driving equipment is started, the connecting rod and the drill bit are driven to rotate synchronously, the corresponding part of the wall surface is ground and broken through the positioning drill, the first grinding drill and the second grinding drill, and generated chips are discharged through the accommodating sinking groove and the chip discharging groove; and the device is suitable for trepanning of wall surfaces with different thicknesses, and the application range is wide.

Description

Technical Field

[0001] The present application relates to the technical field of hole openers, and in particular to a high-power hole opener. Background Art

[0002] Hole openers, as a special tool for processing circular holes, are also called hole saws. They are widely used in modern industry and engineering due to their easy operation, portability and high safety. They can be easily installed on a variety of power tools such as ordinary electric drills, hand drills, impact drills, radial drills, etc., making it easy to open circular holes on the wall.

[0003] However, in the related art, although an alloy hole opener described in the invention patent with publication number CN104551113A is designed to include a head and a handle connected to the head, a carbide blade is provided on the end face of the head, and the blade is in the shape of a quadrangular pyramid, one of which is connected to the head with a rectangular side, and a chip groove is provided between the blades. Such a design improves the durability and chip removal efficiency of the hole opener to a certain extent.

[0004] However, when facing a thicker and harder wall, this hole opener may not be able to successfully open the required round hole due to the limitation of the head size. In order to deal with this situation, the usual practice is to replace the hole opener with a larger size. However, this process is not only cumbersome, but also time-consuming, which will seriously affect the overall hole opening efficiency, and there is room for improvement. Summary of the invention

[0005] The purpose of the present application is to provide a powerful hole opener to solve the problem that when the above-mentioned hole opener is used to open holes in thicker walls, a better and larger hole opener is needed, which affects the hole opening efficiency.

[0006] The powerful hole opener provided in this application adopts the following technical solution: A high-power hole opener comprises a connecting rod and a drill bit fixed on the end of the connecting rod, wherein the drill bit is provided with an accommodating groove on the side away from the connecting rod, and a positioning drill is fixedly provided at the middle part of the bottom side of the accommodating groove; a plurality of first grinding drills are fixedly provided on the bottom side of the accommodating groove, and a plurality of second grinding drills are fixedly provided on the side of the end away from the connecting rod, and a plurality of chip removal grooves connected with the accommodating groove are provided on the outer periphery of the drill bit along the spiral direction.

[0007] By adopting the above technical solution, when the hole opener is used, the end of the connecting rod is installed on the driving device, and then the corresponding driving device is started to drive the connecting rod and the drill bit to rotate synchronously. First, a positioning hole is opened in the wall by using the positioning drill, and then the corresponding part of the wall is ground and broken by the first grinding drill and the second grinding drill. The generated debris is discharged through the accommodating sink and the chip discharge groove; in this process, the hole opening part of the wall is directly ground into debris and discharged, which is suitable for hole opening processing of walls of different thicknesses and has a wide range of applications.

[0008] Optionally, a chip removal gap is provided on the outer circumference of the positioning drill.

[0009] By adopting the above technical solution, when the positioning drill is drilling a hole in the wall, due to the setting of the chip removal notch on the positioning drill, the generated debris can fall into the accommodating trough through the chip removal notch and can be further discharged through the chip removal groove, thereby ensuring the smooth progress of drilling.

[0010] Optionally, a protective sleeve with openings at both ends is sleeved on the outer periphery of the drill bit, and a chip removal hole is provided on the outer periphery of the protective sleeve away from the drill bit; a positioning closing opening abutting against the outer periphery of the connecting rod is provided at the end of the protective sleeve away from the drill bit, and the protective sleeve can rotate around the axis of the connecting rod and slide back and forth along the axis of the connecting rod.

[0011] By adopting the above technical solution, during the process of drilling with the hole opener, the user's hand can hold the protective sleeve tightly and press one side edge of the protective sleeve against the wall, and adjust the opening of the chip removal hole to a downward direction, so as to avoid the splashing of debris generated during the drilling process and allow the debris to be discharged downward through the chip removal hole on the protective sleeve.

[0012] Optionally, the inner diameter of the protective sleeve increases gradually in a direction away from the drill bit.

[0013] By adopting the above technical solution, when using the hole opener to open a hole in the wall, due to the inclined setting inside the protective sleeve, the debris that falls into the protective sleeve can slide along the inclined surface of the inner wall toward the chip removal hole, and finally be discharged from the chip removal hole, thereby facilitating the collection of the debris.

[0014] Optionally, an elastic washer is fixedly provided on the end of the protective sleeve away from the connecting rod.

[0015] By adopting the above technical solution, during the drilling process of the hole opener, due to the application and setting of the elastic gasket, the elastic gasket on the protective sleeve is pressed against the wall, thereby improving the contact stability between the protective sleeve and the wall.

[0016] Optionally, a bearing ring located outside the protective sleeve is fixedly provided on the outer periphery of the connecting rod, and a support ring is fixedly provided on the outer periphery of the bearing ring; a plurality of elastic reset parts are provided on the outside of the protective sleeve, and both ends of the elastic reset parts are respectively fixedly connected to the side surfaces of the support ring and the protective sleeve that are close to each other.

[0017] By adopting the above technical solution, during the process of drilling with the hole opener, the user holds the outer circumference of the support ring tightly with his hand, and as the drill bit penetrates into the wall, the elastic reset member can be used to make the side edge of the protective sleeve press against the wall, thereby reducing the possibility of debris leaking and splashing from the gap between the protective sleeve and the wall during the drilling process.

[0018] Optionally, two adjusting rods are symmetrically hinged on the outside of the support ring, an arc rod is hinged at the end of the adjusting rod away from the support ring, an elastic block is fixed on the side of the arc rod away from the adjusting rod, and the arc rods on the two adjusting rods can abut and fix each other.

[0019] By adopting the above technical solution, when processing the wall surface, the user can flip the adjustment rod and the arc rod, so that the two arc rods are fixedly sleeved on the head of the driving device, so that the elastic block is pressed against the outer peripheral surface of the head of the driving device, freeing one hand of the user so that the user does not need to hold the protective sleeve all the time. This prevents the protective sleeve from rotating synchronously with the drill bit during the hole opening process, thereby improving the performance of the powerful hole opener when used.

[0020] Optionally, the adjusting rod can be rotated in a direction close to the protective sleeve, and the two arc-shaped rods are flipped and sleeved on the outer peripheral surface of the protective sleeve; the two arc-shaped rods can slide back and forth along the axial direction of the protective sleeve.

[0021] By adopting the above technical solution, when the hole opener is in the transport state, the adjustment rod and the arc rod can be adjusted to this state, thereby reducing the space occupied by the hole opener as a whole and facilitating the packaging and transportation of the hole opener.

[0022] Optionally, the cross-sectional dimension of the adjusting rod is larger than the cross-sectional dimension of the chip removal through hole, and the adjusting rod can block the opening of the chip removal through hole.

[0023] By adopting the above technical solution, when opening a hole in a wall with a smaller thickness, the adjusting rod is rotated in the direction close to the protective sleeve, and the two arc rods are flipped and fixed relative to each other, and are sleeved on the outer circumference of the protective sleeve. In this state, one of the adjusting rods blocks the chip removal hole, so that the debris is directly placed into the interior of the protective sleeve, which is more convenient for subsequent processing of the debris.

[0024] Optionally, a positioning protrusion is fixedly provided on the adjusting rod, and a positioning groove for the positioning protrusion to be inserted and slide is formed on the outer peripheral surface of the protective sleeve.

[0025] By adopting the above technical solution, the two arc rods are flipped over and fixed relative to each other, and then sleeved on the outer circumferential surface of the protective sleeve. Due to the setting of the positioning protrusion and the positioning groove, the positioning protrusion can slide synchronously in the positioning groove as the adjusting rod slides relative to each other, thereby improving the installation stability of the adjusting rod when the hole opening processing is carried out in this state.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the hole opener is used, the end of the connecting rod is installed on the driving device, and then the corresponding driving device is started to drive the connecting rod and the drill bit to rotate synchronously. First, a positioning hole is opened on the wall by using the positioning drill, and then the corresponding part of the wall is ground and broken by the first grinding drill and the second grinding drill. The generated debris is discharged through the accommodating sink and the chip discharge groove; in this process, the hole opening part of the wall is directly ground into debris and discharged, which is suitable for hole opening processing of walls of different thicknesses and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 This is a partial structural diagram of the installation distribution of the first grinding drill and the second grinding drill in Example 1 of the present application; Figure 3 It is a schematic diagram of the overall structure of Example 2 of the present application; Figure 4 It is a schematic cross-sectional structure diagram of the installation and matching of the protective sleeve in Example 2 of the present application; Figure 5 This is a schematic diagram of the structure of the second embodiment of the present application, which embodies the installation and coordination of the adjustment rod and the arc rod; Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present application showing that the arc rod is flipped onto the outer periphery of the protective sleeve; Figure 7 It is a schematic diagram of the partial cross-sectional structure of Example 2 of the present application, which embodies the arc rod being flipped onto the outer periphery of the protective sleeve.

[0029] In the figure, 1. connecting rod; 11. bearing ring; 2. drill bit; 21. accommodating groove; 22. positioning drill; 221. chip removal notch; 23. first grinding drill; 24. second grinding drill; 25. chip removal groove; 3. protective sleeve; 31. chip removal hole; 32. positioning closing; 33. elastic gasket; 34. positioning slide groove; 4. support ring; 5. elastic reset member; 51. telescopic rod; 52. reset spring; 6. adjusting rod; 61. positioning protrusion; 7. arc rod; 71. elastic block. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0031] Embodiment 1: Reference Figure 1 and Figure 2 A powerful hole opener comprises a connecting rod 1 and a drill bit 2 integrally formed at one end of the connecting rod 1, wherein a receiving groove 21 is provided on the side of the drill bit 2 away from the connecting rod 1, wherein a positioning drill 22 is integrally formed at the middle of the bottom side of the receiving groove 21, and two first grinding drills 23 are staggered and fixed on the bottom side of the receiving groove 21; four chip removal grooves 25 connected to the receiving groove 21 are evenly provided on the outer circumference of the drill bit 2 along the spiral direction; and a plurality of second grinding drills 24 are staggered and fixed on the side of the end away from the connecting rod 1; When the hole opener is used, the end of the connecting rod 1 away from the drill bit 2 is pre-installed on a driving device (electric drill, impact drill, etc.), and then the corresponding driving device is started to drive the connecting rod 1 and the drill bit 2 to rotate synchronously. First, a positioning hole is opened in the wall by the positioning drill 22, and then the corresponding part of the wall is ground and broken by the first grinding drill 23 and the second grinding drill 24. The generated debris is discharged through the accommodating trough 21 and the chip discharge groove 25.

[0032] Reference Figure 2 A chip removal notch 221 is provided on the outer periphery of the positioning drill 22; the debris generated by the positioning drill 22 when drilling a hole in the wall can fall into the accommodating trough 21 through the chip removal notch 221, and can be further discharged through the chip removal groove 25, ensuring smooth drilling.

[0033] The implementation principle of the embodiment of the present application is: When the hole opener is used, the end of the connecting rod 1 is installed on the driving device, and then the corresponding driving device is started to drive the connecting rod 1 and the drill bit 2 to rotate synchronously. First, a positioning hole is opened in the wall by the positioning drill 22, and then the corresponding part of the wall is ground and broken by the first grinding drill 23 and the second grinding drill 24. The generated debris is discharged through the accommodating trough 21 and the chip discharge groove 25; in this process, the hole opening part of the wall is directly ground into debris and discharged, so that holes can be opened on walls of different thicknesses, and the scope of application is wide.

[0034] Embodiment 2: Reference Figure 3 and Figure 4 The embodiment of the present application is different from the embodiment 1 in that a protective sleeve 3 with openings at both ends is sleeved on the outer periphery of the drill bit 2, wherein a chip removal through hole 31 is opened on the outer periphery of the protective sleeve 3 away from the drill bit 2; and a positioning closing opening 32 abutting against the outer periphery of the connecting rod 1 is provided at the end of the protective sleeve 3 away from the drill bit 2; After the protective sleeve 3 is installed, the protective sleeve 3 can rotate around the axis of the connecting rod 1 and slide back and forth along the axis of the connecting rod 1; in the process of drilling with the hole opener, the user's hand can hold the protective sleeve 3 tightly and press it against the wall, and make the chip removal hole 31 open downward, so as to avoid the splashing of debris generated during the drilling process, and allow the debris to be discharged downward through the chip removal hole 31 on the protective sleeve 3.

[0035] Reference Figure 4 The inner diameter of the protective sleeve 3 increases gradually in the direction away from the drill bit 2, so that the debris falling into the protective sleeve 3 can slide along the inclined surface of the inner wall toward the direction close to the chip removal through hole 31, and finally be discharged from the chip removal through hole 31; An elastic washer 33 made of rubber is fixedly provided on the end of the protective sleeve 3 away from the connecting rod 1; when the hole opener is drilling, the elastic washer 33 on the protective sleeve 3 is pressed against the wall, thereby improving the contact stability between the protective sleeve 3 and the wall.

[0036] Reference Figure 4 and Figure 5 A bearing ring 11 located outside the protective sleeve 3 is fixedly arranged on the outer periphery of the connecting rod 1, wherein a support ring 4 is fixedly arranged on the outer periphery of the bearing ring 11, so that the support ring 4 can reciprocate around the axis of the shaft coil; two elastic reset members 5 are arranged outside the protective sleeve 3, wherein the elastic reset member 5 includes a telescopic rod 51 and a reset spring 52 sleeved on the outer periphery of the telescopic rod 51, and the two ends of the telescopic rod 51 are respectively fixedly connected to the side surfaces of the support ring 4 and the protective sleeve 3 close to each other; During the process of drilling with the hole opener, as the drill bit 2 penetrates into the wall, the elastic reset member 5 can press the side edge of the protective sleeve 3 against the wall, reducing the possibility of debris leaking and splashing from the gap between the protective sleeve 3 and the wall during the drilling process.

[0037] Reference Figure 4 and Figure 5 , two adjusting rods 6 are symmetrically hinged on the outside of the support ring 4, wherein an arc-shaped rod 7 is hinged on the end of the adjusting rod 6 away from the support ring 4, and an elastic block 71 made of sponge material is fixed on the side of the arc-shaped rod 7 away from the adjusting rod 6, and the arc-shaped rods 7 on the two adjusting rods 6 can abut against each other and be fixed by screws; When the two arc-shaped rods 7 are relatively abutted and fixed, the whole is in a circular ring shape and can be fixedly mounted on the head of a driving device (electric drill, impact drill, etc.), so that the elastic block 71 is tightly pressed against the outer peripheral surface of the head of the driving device, thereby preventing the protective sleeve 3 from rotating synchronously with the drill bit 2 during the hole opening process, freeing one hand of the user so that he does not need to hold the protective sleeve 3 all the time.

[0038] Reference Figure 6 The adjusting rod 6 can be rotated in the direction close to the protective sleeve 3, and the two arc rods 7 are flipped and fixed relative to each other, and are sleeved on the outer circumferential surface of the protective sleeve 3; when the adjusting rod 6 and the arc rod 7 are flipped and fixed, the two arc rods 7 can slide back and forth along the axial direction of the protective sleeve 3 as the elastic reset member 5 is compressed or reset; when the hole opener is in the transportation state, the adjusting rod 6 and the arc rod 7 can be adjusted to this state, which is convenient for the packaging and transportation of the hole opener.

[0039] Reference Figure 6 and Figure 7 The cross-sectional dimension of the adjusting rod 6 is larger than the cross-sectional dimension of the chip removal through hole 31. After the two arc-shaped rods 7 are turned over and fixed on the outer circumference of the protective sleeve 3, one of the adjusting rods 6 can block the opening of the chip removal through hole 31, and the other adjusting rod 6 is fixed with a positioning protrusion 61, and the outer circumference of the protective sleeve 3 is provided with a positioning slide groove 34 for the positioning protrusion 61 to be inserted and slide; When the hole opener is used to open a hole in a wall with a smaller wall thickness, less debris is generated during the hole opening process, so the hole opener can also be adjusted to this state. In this state, the chip removal hole 31 is blocked, so that the debris is directly placed into the interior of the protective sleeve 3, which is more convenient for subsequent processing of the debris; at the same time, due to the setting of the positioning protrusion 61 and the positioning groove 34, the installation stability of the adjusting rod 6 is improved during the hole opening processing in this state.

[0040] The implementation principle of the embodiment of the present application is: When processing thicker walls, the adjusting rod 6 and the arc rod 7 are turned over so that the two arc rods 7 are fixedly sleeved on the head of the driving device (hand drill, impact drill, etc.) to prevent the protective sleeve 3 from rotating synchronously with the drill bit 2 during the hole opening process; When drilling a hole in a wall with a smaller thickness, the adjusting rod 6 can be rotated in the direction close to the protective sleeve 3, and the two arc rods 7 can be flipped and fixed relative to each other, and are sleeved on the outer peripheral surface of the protective sleeve 3. In this state, one of the adjusting rods 6 blocks the chip removal hole 31, so that the debris is directly placed into the interior of the protective sleeve 3, which is more convenient for subsequent processing of the debris.

[0041] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A powerful hole opener, characterized in that: It comprises a connecting rod (1) and a drill bit (2) fixed to the end of the connecting rod (1); a receiving groove (21) is provided on the side of the drill bit (2) away from the connecting rod (1); a positioning drill (22) is fixedly provided at the middle of the bottom side of the receiving groove (21); A plurality of first grinding drills (23) are staggered and fixedly arranged on the bottom side of the accommodating groove (21), a plurality of second grinding drills (24) are staggered and fixedly arranged on the side of the end away from the connecting rod (1), and a plurality of chip removal grooves (25) connected to the accommodating groove (21) are formed on the outer periphery of the drill bit (2) along a spiral direction.

2. A powerful hole opener according to claim 1, characterized in that: A chip removal notch (221) is provided on the outer periphery of the positioning drill (22).

3. A powerful hole opener according to claim 1, characterized in that: A protective sleeve (3) with openings at both ends is sleeved on the outer circumference of the drill bit (2), and a chip removal through hole (31) is opened on the outer circumference of the protective sleeve (3) away from the drill bit (2); The end of the protective sleeve (3) away from the drill bit (2) is provided with a positioning opening (32) that abuts against the outer peripheral surface of the connecting rod (1), and the protective sleeve (3) can rotate around the axis of the connecting rod (1) and reciprocate along the axis of the connecting rod (1).

4. A powerful hole opener according to claim 3, characterized in that: The inner diameter of the protective sleeve (3) increases gradually in a direction away from the drill bit (2).

5. A powerful hole opener according to claim 3, characterized in that: An elastic washer (33) is fixedly provided on the end of the protective sleeve (3) away from the connecting rod (1).

6. A powerful hole opener according to claim 3, characterized in that: A bearing ring (11) located outside the protective sleeve (3) is fixedly provided on the outer periphery of the connecting rod (1), and a support ring (4) is fixedly provided on the outer periphery of the bearing ring (11); A plurality of elastic reset members (5) are arranged outside the protective sleeve (3), and two ends of the elastic reset members (5) are respectively fixedly connected to the side surfaces of the support ring (4) and the protective sleeve (3) that are close to each other.

7. A powerful hole opener according to claim 6, characterized in that: Two adjusting rods (6) are symmetrically hinged on the outside of the support ring (4); an arc-shaped rod (7) is hinged on the end of the adjusting rod (6) away from the support ring (4); an elastic block (71) is fixed on the side of the arc-shaped rod (7) away from the adjusting rod (6); and the arc-shaped rods (7) on the two adjusting rods (6) can abut against and be fixed to each other.

8. A powerful hole opener according to claim 7, characterized in that: The adjusting rod (6) can rotate in a direction close to the protective sleeve (3), and the two arc-shaped rods (7) are turned over and sleeved on the outer peripheral surface of the protective sleeve (3); the two arc-shaped rods (7) can slide back and forth along the axial direction of the protective sleeve (3).

9. A powerful hole opener according to claim 8, characterized in that: The cross-sectional dimension of the adjusting rod (6) is greater than the cross-sectional dimension of the chip removal through hole (31), and the adjusting rod (6) can block the opening of the chip removal through hole (31).

10. A powerful hole opener according to claim 8, characterized in that: The adjusting rod (6) is fixedly provided with a positioning protrusion (61), and the outer peripheral surface of the protective sleeve (3) is provided with a positioning sliding groove (34) for the positioning protrusion (61) to be inserted and slide.

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