A powerful hole opener

Abstract

The present application relates to a powerful hole opener, belonging to the technical field of hole openers. It includes a connecting rod and a drill bit fixed at the end of the connecting rod. A receiving sink is provided on the side of the drill bit away from the connecting rod. A positioning drill is fixedly provided in the middle of the bottom side of the receiving sink; a number of first grinding drills are fixedly provided on the bottom side of the receiving sink at a dislocation; a number of second grinding drills are fixedly provided on the side of the end away from the connecting rod at a dislocation; a number of chip discharge grooves communicating with the receiving sink are provided on the outer periphery of the drill bit along the spiral direction; in the present application, when the hole opener is applied, the end of the connecting rod is installed on a driving device, and then the corresponding driving device is started to drive the connecting rod and the drill bit to rotate synchronously. The corresponding part of the wall surface is ground and broken by the positioning drill, the first grinding drills and the second grinding drills, and the generated debris is discharged through the receiving sink and the chip discharge grooves; it is suitable for hole opening processing of walls with different thicknesses and has a large application range.

Description

Technical Field

[0001] This application relates to the technical field of hole openers, and in particular to a powerful hole opener. Background Art

[0002] A hole opener, as a dedicated round hole processing tool, also known as a hole saw, has been widely used in modern industry and engineering due to its simple operation, convenient carrying, and high safety. It can be easily installed on various power tools such as ordinary electric drills, hand drills, impact drills, and radial drills, making it easy to open round holes on walls.

[0003] However, in the related art, although an alloy hole opener described in a patent invention with the publication number CN104551113A, its design includes a head and a shank connected to the head. The end face of the head is provided with a cemented carbide cutting edge, and the cutting edge is in the shape of a quadrangular pyramid, with one rectangular side connected to the head. There is also a chip removal groove between the cutting edges. Such a design improves the durability and chip removal efficiency of the hole opener to a certain extent.

[0004] But when facing a wall with increased strength and a harder texture, this hole opener may be unable to successfully open the required round hole due to the limitation of the head size. To address this situation, the common 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 this 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 a wall with a relatively thick thickness, a better and larger-sized hole opener is required, which affects the hole opening efficiency.

[0006] A powerful hole opener provided by this application adopts the following technical solution:

[0007] A powerful hole opener includes a connecting rod and a drill bit fixed at the end of the connecting rod. A receiving sunk groove is formed on the side of the drill bit away from the connecting rod. A positioning drill is fixedly provided in the middle of the bottom side of the receiving sunk groove. A number of first grinding drills are fixedly provided on the bottom side of the receiving sunk groove in a staggered manner. A number of second grinding drills are fixedly provided on the side of the end away from the connecting rod in a staggered manner. A number of chip removal grooves communicating with the receiving sunk groove are formed on the outer periphery of the drill bit in a spiral direction.

[0008] 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.

[0009] Optionally, a chip removal gap is provided on the outer circumference of the positioning drill.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] Optionally, the inner diameter of the protective sleeve increases gradually in a direction away from the drill bit.

[0014] 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.

[0015] Optionally, an elastic washer is fixedly provided on the end of the protective sleeve away from the connecting rod.

[0016] 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.

[0017] 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; several elastic reset members are provided outside the protective sleeve, and two ends of the elastic reset member are respectively fixedly connected to the support ring and the side surfaces of the protective sleeve close to each other.

[0018] By adopting the above technical solution, during the process of using the hole opener to drill a hole, the user tightly holds the outer periphery of the support ring, and as the drill bit penetrates into the wall surface, the side edge of the protective sleeve can be tightly pressed against the wall surface through the elastic reset member, reducing the possibility of debris leaking and splashing from the gap between the protective sleeve and the wall surface during the drilling process.

[0019] Optionally, two adjusting rods are symmetrically hinged to the outside of the support ring, an arc-shaped rod is hinged to the end of the adjusting rod away from the support ring, and an elastic block is fixedly provided on the side surface of the arc-shaped rod away from the adjusting rod, and the arc-shaped rods on the two adjusting rods can abut against each other and be fixed.

[0020] By adopting the above technical solution, when processing the wall surface, the user can turn the adjusting rod and the arc-shaped rod so that the two arc-shaped rods are fixedly sleeved on the head of the driving device, and the elastic block abuts against the outer peripheral surface of the head of the driving device, liberating one hand of the user so that the user does not need to always hold the protective sleeve tightly. Avoid the protective sleeve rotating synchronously with the drill bit during the hole opening process, and improve the usability of the powerful hole opener during application.

[0021] Optionally, the adjusting rod can rotate towards the direction close to the protective sleeve, and the two arc-shaped rods can be turned over and sleeved on the outer peripheral surface of the protective sleeve; the two arc-shaped rods can reciprocally slide along the axial direction of the protective sleeve.

[0022] By adopting the above technical solution, when the hole opener is in the transportation state, the adjusting rod and the arc-shaped rod can be adjusted to this state, reducing the overall space occupied by the hole opener and facilitating the packing and transportation of the hole opener.

[0023] 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.

[0024] By adopting the above technical solution, when opening a hole in a wall surface with a small thickness dimension, the adjusting rod is rotated towards the direction close to the protective sleeve, and the two arc-shaped rods are turned over and abutted and fixed relative to each other, and sleeved on the outer peripheral surface of the protective sleeve. In this state, one of the adjusting rods blocks the chip removal through hole, so that the debris is directly placed into the inside of the protective sleeve, which is more convenient for subsequent processing of the debris.

[0025] Optionally, a positioning convex block is fixedly provided on the adjusting rod, and a positioning sliding groove for the positioning convex block to insert and slide is provided on the outer peripheral surface of the protective sleeve.

[0026] By adopting the above technical solution, after the two arc-shaped rods are turned over and abutted and fixed relative to each other, and sleeved on the outer peripheral surface of the protective sleeve, due to the arrangement of the positioning bump and the positioning chute, the positioning bump can slide synchronously in the positioning chute along with the relative sliding of the adjusting rod, thereby improving the installation stability of the adjusting rod during the hole-opening processing in this state.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When the hole opener is applied, 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 surface through the positioning drill, and then the corresponding part of the wall surface 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; during this process, the hole-opening part of the wall surface is directly ground into debris and discharged, which is applicable to the hole-opening processing of wall surfaces with different thicknesses and has a large applicable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application;

[0031] Figure 2 is the partial structural schematic diagram of Embodiment 1 of the present application showing the installation distribution of the first grinding drill and the second grinding drill;

[0032] Figure 3 is the overall structural schematic diagram of Embodiment 2 of the present application;

[0033] Figure 4 is the sectional structural schematic diagram of Embodiment 2 of the present application showing the installation and cooperation of the protective sleeve;

[0034] Figure 5 is the structural schematic diagram of Embodiment 2 of the present application showing the installation and cooperation of the adjusting rod and the arc-shaped rod;

[0035] Figure 6 is the structural schematic diagram of Embodiment 2 of the present application showing the arc-shaped rod turned to the outer periphery of the protective sleeve;

[0036] Figure 7 is the partial sectional structural schematic diagram of Embodiment 2 of the present application showing the arc-shaped rod turned to the outer periphery of the protective sleeve.

[0037] In the figure, 1 is a connecting rod; 11 is a bearing ring; 2 is a drill bit; 21 is a receiving sink; 22 is a positioning drill; 221 is a chip discharge notch; 23 is a first grinding drill; 24 is a second grinding drill; 25 is a chip discharge groove; 3 is a protective sleeve; 31 is a chip discharge through hole; 32 is a positioning constriction; 33 is an elastic washer; 34 is a positioning sliding groove; 4 is a support ring; 5 is an elastic reset member; 51 is a telescopic rod; 52 is a reset spring; 6 is an adjusting rod; 61 is a positioning projection; 7 is an arc rod; 71 is an elastic block. Specific embodiments

[0038] The following further elaborates on this application in conjunction with all the attached drawings.

[0039] Embodiment 1:

[0040] Referring to Figure 1 and Figure 2 , a powerful hole opener includes a connecting rod 1 and a drill bit 2 integrally formed at one end of the connecting rod 1. A receiving sink 21 is formed on the side of the drill bit 2 away from the connecting rod 1. A positioning drill 22 is integrally machined in the middle of the bottom side of the receiving sink 21. Two first grinding drills 23 are fixedly arranged at the bottom side of the receiving sink 21 in a staggered manner; four chip discharge grooves 25 communicating with the receiving sink 21 are evenly formed on the outer periphery of the drill bit 2 along the spiral direction; a number of second grinding drills 24 are fixedly arranged at the side of the end away from the connecting rod 1 in a staggered manner.

[0041] When this hole opener is applied, first install the end of the connecting rod 1 away from the drill bit 2 on a driving device (such as a hand drill, an impact drill, etc.), and then start the corresponding driving device to drive the connecting rod 1 and the drill bit 2 to rotate synchronously. First, use the positioning drill 22 to drill a positioning hole in the wall, and then use the first grinding drill 23 and the second grinding drill 24 to grind and break the corresponding part of the wall. The generated debris is discharged through the receiving sink 21 and the chip discharge grooves 25.

[0042] Referring to Figure 2 , a chip discharge notch 221 is formed on the outer periphery of the positioning drill 22; the debris generated by the positioning drill 22 drilling the wall can fall into the receiving sink 21 through the chip discharge notch 221 and can be further discharged through the chip discharge grooves 25, ensuring the smooth progress of the drilling.

[0043] The implementation principle of the embodiment of this application is as follows:

[0044] When this hole opener is applied, 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 drilled in the wall surface through the positioning drill 22, and then the corresponding part of the wall surface is ground and broken by the first grinding drill 23 and the second grinding drill 24. The generated debris is discharged through the accommodating sink 21 and the chip discharge groove 25; during this process, the drilled part of the wall surface is directly ground into debris and discharged, which can perform hole opening processing on wall surfaces of different thicknesses and has a wide application range.

[0045] Embodiment 2:

[0046] Referring to Figure 3 and Figure 4 In this application, the difference between the embodiment and Embodiment 1 is that a protective sleeve 3 with both ends open is sleeved on the outer periphery of the drill bit 2. A chip discharge through hole 31 is opened on the outer peripheral surface of the protective sleeve 3 away from the drill bit 2; a positioning necking 32 that abuts against the outer peripheral surface of the connecting rod 1 is provided at the end of the protective sleeve 3 away from the drill bit 2;

[0047] After the protective sleeve 3 is installed, the protective sleeve 3 can rotate around the axis of the connecting rod 1 and reciprocate along the axis of the connecting rod 1; during the process of using this hole opener to drill, the user's hand can hold the protective sleeve 3 tightly and press it against the wall surface, and make the opening of the chip discharge through hole 31 face downward, so as to avoid the splashing of debris during the drilling process and enable the debris to be discharged downward through the chip discharge through hole 31 on the protective sleeve 3.

[0048] Referring to Figure 4 , the inner diameter dimension of the protective sleeve 3 increases 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 towards the direction close to the chip discharge through hole 31 and finally be discharged from the chip discharge through hole 31;

[0049] An elastic washer 33 made of rubber material is fixedly provided at 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 tightly against the wall surface to improve the abutting stability between the protective sleeve 3 and the wall surface.

[0050] Referring to Figure 4 and Figure 5 , a bearing ring 11 located outside the protective sleeve 3 is fixedly provided on the outer periphery of the connecting rod 1. A support ring 4 is fixedly provided on the outer periphery of the bearing ring 11, so that the support ring 4 can reciprocally rotate around the axis of the bearing ring; two elastic resetting members 5 are provided outside the protective sleeve 3. The elastic resetting member 5 includes a telescopic rod 51 and a reset spring 52 sleeved on the outer periphery of the telescopic rod 51. The two ends of the telescopic rod 51 are respectively fixedly connected to the mutually approaching side surfaces of the support ring 4 and the protective sleeve 3;

[0051] During the process of drilling with this hole opener, as the drill bit 2 penetrates into the wall, the side edge of the protective sleeve 3 can be pressed against the wall through the elastic reset member 5, reducing the possibility of debris leaking and splashing from the gap between the protective sleeve 3 and the wall during the drilling process.

[0052] Referring to Figure 4 and Figure 5 , two adjusting rods 6 are symmetrically hinged to the outside of the support ring 4. One end of the adjusting rod 6 away from the support ring 4 is hinged with an arc rod 7. An elastic block 71 made of sponge material is fixedly arranged on the side of the arc rod 7 away from the adjusting rod 6. The arc rods 7 on the two adjusting rods 6 can abut against each other and be fixed by screws;

[0053] When the two arc rods 7 are abutted and fixed relative to each other, the whole is in a circular ring shape and can be fixedly sleeved on the head of the driving device (such as a hand drill, an impact drill, etc.), so that the elastic block 71 abuts 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, liberating one hand of the user so that he does not need to keep holding the protective sleeve 3 tightly.

[0054] Referring to Figure 6 , the adjusting rod 6 can rotate towards the direction close to the protective sleeve 3, and the two arc rods 7 can be flipped and abutted and fixed relative to each other, and sleeved on the outer peripheral 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 reciprocate 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.

[0055] Referring to 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 rods 7 are flipped and fixed on the outer peripheral surface of the protective sleeve 3, at this time, one of the adjusting rods 6 can block the opening of the chip removal through hole 31, and a positioning convex block 61 is fixedly arranged on the other adjusting rod 6, and a positioning chute 34 for the positioning convex block 61 to insert and slide is arranged on the outer peripheral surface of the protective sleeve 3;

[0056] When the hole opener opens a hole in a wall with a smaller wall thickness, the debris generated during the hole opening process is less, so the opener can also be adjusted to this state. In this state, the chip removal through hole 31 is blocked, and the debris is directly placed into the protective sleeve 3, which is more convenient for the subsequent treatment of the debris; at the same time, due to the arrangement of the positioning convex block 61 and the positioning chute 34, the installation stability of the adjusting rod 6 during the hole opening process in this state is improved.

[0057] The implementation principle of the embodiment of this application is:

[0058] When processing a relatively thick wall surface, turn the adjusting rod 6 and the arc rod 7 so that the two arc rods 7 are fixedly sleeved on the head of a driving device (such as a hand drill, an impact drill, etc.), to prevent the protective sleeve 3 from rotating synchronously with the drill bit 2 during the hole opening process;

[0059] When opening a hole in a wall surface with a relatively small thickness dimension, the adjusting rod 6 can rotate towards the direction close to the protective sleeve 3, and after the two arc rods 7 are turned over, they are relatively abutted and fixed, and sleeved on the outer peripheral surface of the protective sleeve 3. In this state, one of the adjusting rods 6 blocks the chip discharge through hole 31, so that the chips are directly placed into the interior of the protective sleeve 3, which is more convenient for subsequent processing of the chips.

[0060] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meanings understood by those with ordinary skills in the field to which this application belongs. The words such as "first", "second", "third" and similar words used in the text of this application do not represent any order, quantity or importance, but are only used to distinguish different components. Words such as "a" or "one" do not represent a quantity limitation either, but indicate that there is at least one. Words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0061] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore: Any equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A powerful hole opener, characterized in that, It includes a connecting rod (1) and a drill bit (2) fixed at the end of the connecting rod (1). A receiving sunk groove (21) is formed on the side of the drill bit (2) away from the connecting rod (1). A positioning drill (22) is fixedly arranged in the middle of the bottom side of the receiving sunk groove (21); a number of first grinding drills (23) are fixedly arranged on the bottom side of the receiving sunk groove (21) in a staggered manner, and a number of second grinding drills (24) are fixedly arranged on the side of the drill bit away from the connecting rod (1) in a staggered manner. A number of chip discharge grooves (25) communicating with the receiving sunk groove (21) are formed on the outer periphery of the drill bit (2) along the spiral direction; A protective sleeve (3) with both ends open is sleeved on the outer periphery of the drill bit (2). Chip discharge through holes (31) are formed on the outer peripheral surface of the protective sleeve (3) away from the drill bit (2); a positioning closing opening (32) abutting against the outer peripheral surface of the connecting rod (1) is arranged at the end of the protective sleeve (3) away from the drill bit (2). The protective sleeve (3) can rotate around the axis of the connecting rod (1) and reciprocally slide along the axis of the connecting rod (1); A bearing ring (11) located outside the protective sleeve (3) is fixedly arranged on the outer periphery of the connecting rod (1). A support ring (4) is fixedly arranged on the outer periphery of the bearing ring (11); a number of elastic resetting members (5) are arranged outside the protective sleeve (3). The two ends of the elastic resetting member (5) are respectively fixedly connected to the mutually approaching side surfaces of the support ring (4) and the protective sleeve (3); Two adjusting rods (6) are symmetrically hinged to the outside of the support ring (4). An arc-shaped rod (7) is hinged to the end of the adjusting rod (6) away from the support ring (4). An elastic block (71) is fixedly arranged on the side of the arc-shaped rod (7) away from the adjusting rod (6). The arc-shaped rods (7) on the two adjusting rods (6) can abut against each other and be fixed; The adjusting rod (6) can rotate towards the direction close to the protective sleeve (3), and the two arc-shaped rods (7) can be flipped and sleeved on the outer periphery of the protective sleeve (3); the two arc-shaped rods (7) can reciprocally slide along the axis direction of the protective sleeve (3); The cross-sectional dimension of the adjusting rod (6) is larger than the cross-sectional dimension of the chip discharge through hole (31). The adjusting rod (6) can block the opening of the chip discharge through hole (31); a positioning convex block (61) is fixedly arranged on the adjusting rod (6). A positioning sliding groove (34) for the positioning convex block (61) to insert and slide is formed on the outer peripheral surface of the protective sleeve (3).

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

3. The powerful hole opener according to claim 1, characterized in that, The inner diameter dimension of the protective sleeve (3) increases along the direction away from the drill bit (2).

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

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