A drill for forming a rectangular hole and a method of forming a rectangular hole

Abstract

The present application relates to a kind of drill for rectangular hole forming and the method of forming rectangular hole, comprising: the fixed frame of rectangular hole that can move up and down;Four milling devices for trimming initial hole are respectively installed in the top four corners of fixed frame, to obtain the four corners of rectangular hole;Trimming device for trimming initial hole is installed in the bottom end of fixed frame, and can move in the front-back direction and left-right direction of fixed frame, to obtain the four edges of rectangular hole.The present application is trimmed to initial hole by trimming device, to obtain the four edges of rectangular hole, and is trimmed to initial hole by milling device, to obtain the four corners of rectangular hole, to obtain rectangular hole.

Description

Technical Field

[0001] This invention relates to the field of drilling equipment technology, and in particular to a drilling tool for forming rectangular holes and a method for forming rectangular holes. Background Technology

[0002] When drilling in soil or rock layers, rectangular holes are often required. Currently, there are two methods for drilling rectangular holes: one is to manually use small drilling equipment to trim the hole to obtain a rectangular shape; the other is to manually use a rotary drilling rig to pre-drill an initial hole consisting of at least one circular hole, then erect a lifting device at the opening of the initial hole, and manually trim the hole on the lifting device to obtain a rectangular shape. Because the soil or rock structure cannot be determined, the drilled hole is at risk of collapse. Both of these methods require manual labor inside the hole, threatening personal safety, and are inefficient and labor-intensive. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a drilling tool for forming rectangular holes and a method for forming rectangular holes, which solves the technical problems of low work efficiency and high labor intensity when manually shaping an initial hole consisting of at least one circular hole into a rectangular hole.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] A drill bit for forming rectangular holes, comprising:

[0008] A fixed frame that can move vertically;

[0009] Four milling devices are used to trim the initial hole to obtain the four corners of the rectangular hole. The four milling devices are mounted on the top of the fixed frame and arranged in a rectangular shape.

[0010] A trimming device for trimming an initial hole to obtain the four sides of the rectangular hole, the trimming device being mounted at the bottom of the fixing frame and capable of moving along the front-back and left-right directions of the fixing frame.

[0011] Preferably, the milling device includes a cylindrical milling head and a first rotary actuator for driving the milling head to rotate about its axial direction;

[0012] The milling head can simultaneously trim two sides of the same corner of the rectangular hole. The outer side and outer end of the milling head extend out of the fixing frame. The axial direction of the milling head is arranged in the left-right direction or the front-back direction.

[0013] Preferably, the trimming device includes a rock drill that can move along the front-back and left-right directions of the fixed frame, and the rock drill can also rotate around the up-down direction to trim the initial hole to obtain the four sides of the rectangular hole.

[0014] Preferably, the trimming device further includes a first moving device for moving the rock drilling machine in the left-right direction along the fixed frame.

[0015] Preferably, the first mobile device includes:

[0016] The first mounting plate is installed at the bottom of the fixing frame;

[0017] A first drive sprocket and a first driven sprocket are respectively installed at the left and right ends of the first mounting plate. A first transmission chain capable of driving the rock drilling machine to move in the left and right direction is sleeved on the first drive sprocket and the first driven sprocket.

[0018] Preferably, the trimming device further includes a second moving device for driving the rock drilling machine to move along the front-back direction of the fixed frame;

[0019] The second moving device includes a second mounting plate, the top of which is connected to the bottom of the first transmission chain. A second driving sprocket and a second driven sprocket are respectively mounted on the front and rear ends of the second mounting plate. A second transmission chain capable of driving the rock drilling machine to move in the front-back direction is sleeved on the second driving sprocket and the second driven sprocket.

[0020] Preferably, the trimming device further includes a rotary drive device for driving the rock drilling machine to rotate in the vertical direction;

[0021] The rotary drive device includes a base plate, a first gear, a second gear meshing with the first gear, and a second rotary driver that drives the second gear to rotate.

[0022] The base plate is installed between the second transmission chain and the rock drilling machine;

[0023] The first gear is rotatably connected to the bottom of the base plate and can drive the rock drilling machine to rotate in the up-down direction;

[0024] The second rotary driver is fixed to the base plate.

[0025] Preferably, it further includes a connecting frame installed at the top center of the fixed frame, the connecting frame being connected to the lifting device so that the fixed frame can drive the trimming device and the milling device to move up and down.

[0026] The present invention also provides a method for forming a rectangular hole in a drill bit for rectangular hole forming based on any of the above-mentioned schemes, comprising the following steps:

[0027] S1. Place the drill bit for forming a rectangular hole at the opening of the initial hole, and slowly move the drill bit for forming a rectangular hole downwards. During the downward movement, the rock drilling machine trims the four sides of the initial hole to obtain a trimmed hole.

[0028] S2. The four milling devices respectively trim the four corners of the trimming hole to obtain a rectangular hole.

[0029] Preferably, S1 includes a first transmission chain driving the rock drilling machine to move in the left-right direction, and a second transmission chain moving in the front-back direction to trim the initial hole and obtain the four sides of the rectangular hole.

[0030] (III) Beneficial Effects

[0031] The beneficial effects of this invention are:

[0032] (1) The present invention uses a trimming device to trim the initial hole to obtain the four sides of the rectangular hole, and uses a milling device to trim the initial hole to obtain the four corners of the rectangular hole, thereby obtaining the rectangular hole.

[0033] (2) The present invention enables the rock drilling machine to move in a straight line and to trim the initial hole to obtain the four sides of a rectangular hole by means of the first moving device, the second moving device and the rotary drive device. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the drill bit for rectangular hole forming according to the present invention from one perspective;

[0035] Figure 2 This is a schematic diagram of the drill bit for rectangular hole forming according to the present invention from another perspective;

[0036] Figure 3 This is a process diagram of the rectangular hole forming of the present invention.

[0037] [Explanation of Labels in the Attached Image]

[0038] 1: Milling head; 2: Milling device; 3: Fixing frame; 4: Trimming device; 5: Rectangular hole; 6: Round hole; 7: First transmission chain; 8: Second transmission chain; 9: First gear; 10: Base plate; 11: Rock drilling rig; 12: First sprocket rotary drive; 13: Second slide rail; 14: Second roller; 15: First driven sprocket; 16: Second driven sprocket; 17: First slide rail. Detailed Implementation

[0039] To better explain and facilitate understanding of the present invention, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Wherein, Figure 1 For reference, the end closer to the milling device 2 is called "upper", the end closer to the rock drilling rig 11 is called "lower", the axial direction of the milling head 1 is called "front-back direction", and the axial direction perpendicular to the milling head 1 is called "left-right direction".

[0040] Example 1

[0041] like Figure 1 and 2 As shown, a drill bit for forming rectangular holes includes: a fixed frame 3 that can move up and down; four milling devices 2 for trimming the initial hole to obtain the four corners of the rectangular hole 5, the four milling devices 2 being installed on the top of the fixed frame 3 and arranged in a rectangular shape, the rectangular arrangement being such that the lines connecting the beginning and end of the four milling devices 2 form a rectangle; and a trimming device 4 for trimming the initial hole to obtain the four sides of the rectangular hole 5, the trimming device 4 being installed at the bottom of the fixed frame 3 and being able to move along the front-back direction and the left-right direction of the fixed frame 3.

[0042] In this embodiment, the fixing frame 3 is a cuboid structure, and four milling devices 2 are respectively installed at the four corners of the fixing frame 3.

[0043] In this embodiment, when drilling the rectangular hole 5, a rotary drilling rig is used to pre-drill at least one initial hole 6 at the location of the pre-drilled rectangular hole 5. Then, the drilling tool for forming the rectangular hole is placed at the opening of the pre-drilled initial hole to shape the initial hole into a rectangular hole 5. Specifically, when the drilled rectangular hole 5 is a square hole, the diameter of the drill bit of the rotary drilling rig is the length of the side of the square, and the number of drilled circular holes 6 is one. When the drilled rectangular hole 5 is not a square, the diameter of the drill bit of the rotary drilling rig is the length of the short side of the rectangular hole 5, and at least two circular holes 6 are drilled. At least two circular holes 6 are arranged side by side along the long side of the rectangular hole 5, and the distance between the centers of adjacent circular holes 6 is less than the radius of the circular holes 6. The number of circular holes 6 is determined by the length of the long side of the rectangular hole 5, and the circular holes 6 at both ends are tangent to the two short sides of the rectangular hole 5, respectively.

[0044] The present invention uses a trimming device 4 to trim the initial hole to obtain the four sides of a rectangular hole 5, and a milling device 2 to trim the initial hole to obtain the four corners of the rectangular hole 5, thereby obtaining the rectangular hole 5.

[0045] like Figure 1As shown, the milling device 2 includes a milling head 1 and a first rotary actuator that drives the milling head 1 to rotate about its axial direction. The milling head 1 can simultaneously trim two sides of the same corner of the rectangular hole 5. The outer side and outer end of the milling head 1 extend out of the fixing frame 3. The initial hole is trimmed by the milling head 1 to obtain the four corners of the rectangular hole.

[0046] The milling head 1 is arranged axially along the front-to-back direction or along the left-to-right direction, such as... Figure 1 As shown, in this embodiment, the axial direction of all milling heads 1 is arranged along the front-back direction. Of course, in other embodiments of this solution, the axial direction of all milling heads 1 can also be arranged along the left-right direction, or the axial direction of some milling heads 1 can be arranged along the left-right direction, and the axial direction of the remaining milling heads 1 can be arranged along the front-back direction, as long as the adjacent milling heads 1 do not affect each other's work and can be used to trim the initial hole to obtain the corner of the rectangular hole 5.

[0047] In this embodiment, as Figure 1 As shown, the milling head 1 has a cylindrical structure. The outer side of the milling head 1 is the side of the milling head 1 away from the center of the fixing frame 3 along the radial direction. The outer end of the milling head 1 is the opposite end of the adjacent milling head 1 along the axial direction.

[0048] In this embodiment, the first rotary driver can be a servo motor or a motor.

[0049] like Figure 2 As shown, the trimming device 4 includes a rock drill 11 that can move along the front-back and left-right directions of the fixed frame 3. The rock drill 11 can also rotate in the up-down direction to trim the initial hole to obtain the four sides of the rectangular hole 5. The drill bit of the rock drill 11 faces the inner wall of the rectangular hole 5. The initial hole is trimmed by the rock drill 11 to obtain the four sides of the rectangular hole 5.

[0050] like Figure 2 As shown, the trimming device 4 also includes a first moving device for moving the rock drill 11 in the left-right direction along the fixed frame 3. The first moving device moves the rock drill 11 in the left-right direction so that the rock drill 11 can trim the entire initial hole, and the rock drill 11 moves in a straight line to obtain the four sides of the rectangular hole 5.

[0051] like Figure 2As shown, the first moving device includes a first mounting plate installed at the bottom of the fixed frame 3; a first driving sprocket and a first driven sprocket 15 respectively installed at the left and right ends of the first mounting plate; and a first transmission chain 7 sleeved on the first driving sprocket and the first driven sprocket 15, which can drive the rock drilling machine 11 to move in the left and right direction. The first transmission chain 7 drives the rock drilling machine 11 to move in the left and right direction, so that the rock drilling machine 11 can trim the entire initial hole, and the rock drilling machine 11 moves in a straight line to obtain the four sides of the rectangular hole 5.

[0052] In this embodiment, a first sprocket rotation driver 12 is also included to drive the first active sprocket to rotate. The first sprocket rotation driver 12 may be a servo motor or a motor. The first sprocket rotation driver 12 is fixed on the first mounting plate, and there are two first driven sprockets 15.

[0053] In this embodiment, the first sprocket rotation driver 12 is a servo motor. Of course, the first sprocket rotation driver 12 in this solution is not limited to the structure of a servo motor. It can also be a motor, as long as it can drive the first active sprocket to rotate and enable the first transmission chain 7 to stay at any position.

[0054] like Figure 2 As shown, the trimming device 4 also includes a second moving device for moving the rock drilling machine 11 along the front-back direction of the fixed frame 3.

[0055] like Figure 2 As shown, the second moving device includes a second mounting plate. The top of the second mounting plate is connected to the bottom of the first transmission chain 7. A second driving sprocket and a second driven sprocket 16 are respectively mounted on the front and rear ends of the second mounting plate. A second transmission chain 8, capable of driving the rock drilling machine 11 to move in the front-back direction, is sleeved on the second driving sprocket and the second driven sprocket 16. The second transmission chain 8 drives the rock drilling machine 11 to move in the front-back direction, so that the rock drilling machine 11 can trim the entire initial hole, and the rock drilling machine 11 moves in a straight line to obtain the four sides of the rectangular hole 5.

[0056] In this embodiment, a second sprocket rotation driver is also included to drive the second active sprocket to rotate. The second sprocket rotation driver can be a servo motor or a motor. The second sprocket rotation driver is fixed on the second mounting plate, and there are two second driven sprockets 16.

[0057] In this embodiment, the bottom of the first mounting plate is provided with first slide rails 17 on both the front and rear sides, and the top of the second mounting plate is provided with first rollers that are slidably connected to the first slide rails 17 on both the front and rear sides. The first rollers can be suspended in the first slide rails 17 so that the second mounting plate can drive the rock drilling machine 11 to move smoothly.

[0058] In this embodiment, the second sprocket rotation driver is a servo motor. Of course, the second sprocket rotation driver in this solution is not limited to the structure of a servo motor. It can also be a motor, as long as it can drive the second active sprocket to rotate and enable the second transmission chain 8 to stay at any position.

[0059] like Figure 2 As shown, the trimming device 4 also includes a rotary drive device for driving the rock drilling machine 11 to rotate in the up-down direction.

[0060] like Figure 2 As shown, the rotary drive device includes a base plate 10, a first gear 9, a second gear meshing with the first gear 9, and a second rotary driver that drives the second gear to rotate. The base plate 10 is installed between the second transmission chain 8 and the rock drilling rig 11. The first gear 9 is rotatably connected to the bottom of the base plate 10 and can drive the rock drilling rig 11 to rotate in the up-down direction. The second rotary driver is fixed on the base plate 10. A drilling rig mounting frame 11 is installed between the rock drilling rig 11 and the first gear 9. The first gear 9 drives the rock drilling rig 11 to rotate through the drilling rig mounting frame to trim the initial hole and obtain the four sides of the rectangular hole 5.

[0061] The bottom left and right sides of the second mounting plate are provided with second slide rails 13, and the top left and right ends of the base plate 10 are provided with second rollers 14 that are slidably connected to the second slide rails 13. The second rollers 14 can be suspended in the second slide rails 13 so that the base plate 10 can drive the rock drilling machine 11 to move smoothly.

[0062] In this embodiment, the second rotary driver can be a servo motor or a motor.

[0063] like Figure 1 As shown, it also includes a connecting frame installed at the top center of the fixed frame 3. The connecting frame is connected to the lifting device so that the fixed frame 3 can drive the trimming device 4 and the milling device 2 to move up and down. The lifting device drives the drill bit used for rectangular hole forming to move up and down, so that the trimming device 4 and the milling device 2 can move up and down, respectively trimming the initial hole to obtain the four sides and four corners of the rectangular hole 5.

[0064] Example 2

[0065] like Figure 3 As shown, this embodiment provides a method for forming a rectangular hole using any of the above-mentioned drill tools for rectangular hole forming, comprising the following steps:

[0066] S1. Using a lifting device, the drill bit for rectangular hole forming is suspended at the opening of the initial hole, and the drill bit for rectangular hole forming is slowly lowered. During the lowering process, the rock drilling machine 11 trims the initial hole to obtain a trimmed hole.

[0067] Before step S1, a rotary drilling rig with a drill bit diameter equal to the short side length of the rectangular hole 5 is used to drill at least one circular hole 6 to obtain an initial hole.

[0068] Specifically, when the drilled rectangular hole 5 is a square hole, the diameter of the drill bit of the rotary drilling rig is the length of the side of the square, and the initial hole includes one circular hole 6. When the drilled rectangular hole 5 is not a square, the diameter of the drill bit of the rotary drilling rig is the length of the shorter side of the rectangular hole 5, and the initial hole includes at least two circular holes 6. The centers of the at least two circular holes 6 are arranged side by side along the longer side of the rectangular hole 5, and the distance between the centers of adjacent circular holes 6 is less than the radius of the circular hole 6. The number of circular holes 6 is determined by the length of the longer side of the rectangular hole 5, and the circular holes 6 at both ends are tangent to the two shorter sides of the rectangular hole 5, respectively.

[0069] S2. The four milling devices 2 respectively trim the four corners of the trimming hole to obtain a rectangular hole 5.

[0070] Specifically, the first sprocket rotary driver drives the first drive sprocket to rotate, and the first drive sprocket drives the rock drilling rig 11 to move linearly in the left-right direction via the first transmission chain 7. The second sprocket rotary driver drives the second drive sprocket to rotate, and the second drive sprocket drives the rock drilling rig 11 to move linearly in the front-back direction via the second transmission chain 8, thereby adjusting the position of the rock drilling rig 11 and thus trimming the initial hole to obtain the four sides of the rectangular hole 5. The first rotary driver drives the milling head 1 to rotate, trimming the four corners of the trimmed hole so that the four corners of the rectangular hole 5 are right angles.

[0071] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0074] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A drilling tool for forming rectangular holes, characterized in that, include: A fixed frame that can move up and down (3); Milling devices (2) for trimming the initial hole to obtain the four corners of the rectangular hole (5), the four milling devices (2) are mounted on the top of the fixed frame (3) and arranged in a rectangular shape; A trimming device (4) for trimming the initial hole to obtain the four sides of the rectangular hole (5), the trimming device (4) is installed at the bottom of the fixing frame (3) and can move along the front-back direction and the left-right direction of the fixing frame (3). The milling device (2) includes a cylindrical milling head (1) and a first rotary drive that drives the milling head (1) to rotate about its axial direction; The milling head (1) can simultaneously trim the two sides of the same corner of the rectangular hole (5). The outer side and outer end of the milling head (1) extend out of the fixing frame (3). The axial direction of the milling head (1) is arranged along the left-right direction or along the front-back direction. The trimming device (4) includes a rock drill (11) that can move along the front-back and left-right directions of the fixed frame (3). The rock drill (11) can also rotate around the up-down direction to trim the initial hole and obtain the four sides of the rectangular hole (5).

2. The drill bit for rectangular hole forming as described in claim 1, characterized in that, The trimming device (4) also includes a first moving device for moving the rock drilling machine (11) in the left and right directions along the fixed frame (3).

3. The drill bit for rectangular hole forming as described in claim 2, characterized in that, The first mobile device includes: The first mounting plate is installed at the bottom of the fixing frame (3); The first driving sprocket and the first driven sprocket (15) are respectively installed on the left and right ends of the first mounting plate. The first driving sprocket and the first driven sprocket (15) are fitted with a first transmission chain (7) that can drive the rock drilling machine (11) to move in the left and right direction.

4. The drill bit for rectangular hole forming as described in claim 3, characterized in that, The trimming device (4) also includes a second moving device for driving the rock drilling machine (11) to move along the front and rear direction of the fixed frame (3); The second moving device includes a second mounting plate, the top of which is connected to the bottom of the first transmission chain (7). The front and rear ends of the second mounting plate are respectively equipped with a second driving sprocket and a second driven sprocket (16). The second driving sprocket and the second driven sprocket (16) are fitted with a second transmission chain (8) that can drive the rock drilling machine (11) to move in the front and rear direction.

5. The drill bit for rectangular hole forming as described in claim 4, characterized in that, The trimming device (4) also includes a rotary drive device for driving the rock drilling machine (11) to rotate in the up and down direction; The rotary drive device includes a base plate (10), a first gear (9), a second gear meshing with the first gear (9), and a second rotary driver that drives the second gear to rotate; The base plate (10) is installed between the second transmission chain (8) and the rock drilling machine (11); The first gear (9) is rotatably connected to the bottom of the base plate (10) and can drive the rock drilling machine (11) to rotate in the up and down direction; The second rotary driver is fixed to the base plate (10).

6. The drilling tool for rectangular hole forming as described in any one of claims 1 to 5, characterized in that, It also includes a connecting frame installed at the top center of the fixed frame (3), the connecting frame being connected to the lifting device so that the fixed frame (3) can drive the trimming device (4) and the milling device (2) to move up and down.

7. A method for forming a rectangular hole using a drill bit for rectangular hole forming according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Place the drill bit for forming a rectangular hole at the opening of the initial hole and slowly move the drill bit for forming a rectangular hole downward. During the downward movement, the rock drilling machine (11) trims the four sides of the initial hole to obtain a trimmed hole. S2. The four milling devices (2) respectively trim the four corners of the trimming hole to obtain a rectangular hole (5).

8. The method for forming a rectangular hole as described in claim 7, characterized in that, S1 includes a first transmission chain (7) that drives the rock drilling machine (11) to move in the left and right direction, and a second transmission chain (8) that moves in the front and back direction to trim the initial hole and obtain the four sides of the rectangular hole.

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