An electric drill and a drilling device

Abstract

The application provides an electric drill and a drilling device. The drilling device comprises a cylindrical frame, which internally contains a plurality of electric drills; and a control system, which is used for uniformly controlling the start and stop of the plurality of electric drills and simultaneously controlling the movement of drill bits of the plurality of electric drills. The control system simultaneously controls the plurality of electric drills to move towards the center and move outward through a transmission mechanism, so that the drilling device can simultaneously drill out conical holes with the same depth in all directions. The application has the advantages that: a plurality of electric drills can be simultaneously controlled to drill out conical holes on the side wall of a mounting hole in different directions, and the drilling of a plurality of conical holes on the side wall of one mounting hole can be completed through one operation, thereby greatly improving the work efficiency; the depth of each conical hole can be accurately controlled, and a plurality of conical holes with the same depth can be simultaneously drilled out, which is not only suitable for drilling out conical holes for carbon anodes, but also can be used in similar scenes requiring the drilling out of holes with the same depth.

Description

Technical Field

[0001] This application belongs to the field of mechanical drilling technology, specifically relating to an electric drill and drilling device. Background Technology

[0002] In the Hall-Héroult process for producing electrolytic aluminum, the carbon anode is one of the core components of the electrolytic cell. Its core functions are to conduct current, participate in electrochemical reactions, and provide the key carbon element for the electrolysis process. It is a "bridge" connecting the external power source and the electrolysis system to realize the reduction of alumina to metallic aluminum.

[0003] During electrolysis, the anode rod needs to be connected to the carbon anode. The connection between the anode rod and the carbon anode must meet four core requirements: low resistance, high strength, high temperature resistance, and easy disassembly and assembly. It must ensure efficient current conduction (avoiding local overheating), withstand the weight of the carbon anode and the mechanical stress in the electrolytic cell, and adapt to the production rhythm of "periodic replacement of carbon anode".

[0004] Currently, the mainstream connection method in industry is "phosphorus pig iron casting connection": The carbon anode has several mounting holes at its upper part, and the anode guide rod has several steel claws corresponding to these mounting holes. During connection, the steel claws are inserted into the mounting holes, and pre-melted liquid phosphorus pig iron is slowly injected through a casting funnel into the gap between the steel claws and the sidewall of the mounting hole. Once the phosphorus pig iron has cooled naturally, the anode guide rod and the carbon anode are fixed together. To better connect the anode guide rod and the carbon anode, multiple conical holes need to be machined at the connection point of the carbon anode to accommodate the phosphorus pig iron, thereby increasing the contact area. Due to the limited space at the connection point of the carbon anode, conventional drilling devices are unsuitable for this working scenario; therefore, a device suitable for drilling conical holes at the connection point of the carbon anode is urgently needed. Utility Model Content

[0005] The purpose of this application is to overcome the defects of existing carbon anodes and anode rods, which are prone to loosening and deformation, affecting the reliability and conductivity of the connection.

[0006] To achieve the above objectives, this application proposes an electric drill, comprising: The first motor, the first reducer, the first coupling, the flexible shaft, and the drill bit are connected in sequence. The shaft protective sleeve is made of rigid material and is fitted over the outside of the flexible shaft; The shaft protective sleeve has two bends; through the two bends, the included angle between the axes of the openings at both ends of the shaft protective sleeve forms a first predetermined angle.

[0007] As an improvement to the aforementioned electric drill, the inner sides of the two bends respectively have a first reinforcing rib and a second reinforcing rib to prevent the shaft protective sleeve from deforming during bending.

[0008] As an improvement to the aforementioned electric drill, the drill bit is a tapered shape with sharp edges.

[0009] As an improvement to the aforementioned electric drill, a universal coupling is also connected between the first coupling and the flexible shaft. The first and second reinforcing ribs are fused together to form the third reinforcing rib.

[0010] This application also provides a drilling apparatus, including the above-mentioned electric drill, the drilling apparatus comprising: A cylindrical frame, internally housing multiple of the aforementioned electric drills; and A control system is used to uniformly control the start and stop of multiple electric drills, and simultaneously control the movement of the drill bits of multiple electric drills; The rack includes: A top cover plate located on the upper end face of the frame; multiple electric drills are evenly spaced and fixed to the lower circumference edge of the top cover plate; A cylindrical outer shell, the edge of its upper end face is fixedly connected to the edge of the upper cover plate; A cylindrical telescopic dust cover, the edge of its upper end face is fixedly connected to the edge of the lower end face of the outer shell; Multiple cylindrical first tie rods of equal length are fixed at their upper ends at evenly spaced intervals to the lower circumference edge of the upper cover plate; and A disc-shaped lower fixing plate is fixed to the lower end of multiple first tie rods; the lower fixing plate has multiple through openings along the radial direction, and the shaft protective sleeve of each motor passes through one of the through openings; The control system includes: The second motor, the second reducer, and the second coupling, which are connected in sequence, are fixed at the lower center of the upper cover plate. The screw, one end of which is fixedly connected to the second coupling; and A disc-shaped drive plate has a through hole with internal threads in the center, which is threaded to the screw; one or more limiting discs with circular holes extend radially from the drive plate; the circular holes of the limiting discs are sleeved on the first pull rod; The bottom of the drive plate is fixed with multiple protruding connecting seats at even intervals; each connecting seat is pinned to one end of an H-shaped transmission rod; the end of the transmission rod away from the connecting seat is pinned to the third reinforcing rib plate of the electric drill; two linear guide rails are fixed on both sides of the third reinforcing rib plate at a second predetermined angle to the plane of the upper cover plate; multiple pairs of plate-shaped positioning bases are fixed at even intervals along the circumferential edge of the upper part of the lower fixed plate; the third reinforcing rib plate of each electric drill is located between a pair of positioning bases; a guide groove is fixed on the surface of each pair of positioning bases close to the third reinforcing rib plate; the direction of the guide groove is at a second predetermined angle to the plane of the upper cover plate; the guide groove on each pair of positioning bases can accommodate the two linear guide rails on both sides of the third reinforcing rib plate. The number of connecting seats and transmission rods is the same as the number of electric drills.

[0011] As an improvement to the above-mentioned drilling device, the device further includes: The sensor bracket is fixed to the frame. The first sensor and the second sensor are fixed in adjustable positions on the sensor bracket; the first sensor is positioned closer to the upper cover plate than the second sensor. A sensor plate is fixed on the drive board; when the sensor plate moves to the same height as the first sensor or the second sensor, the first sensor or the second sensor can sense the sensor plate and transmit a sensing signal to the control system.

[0012] As an improvement to the above-mentioned drilling device, the device further includes: Multiple nozzle tubes, one end of which is fixed to the lower part of the lower fixing plate; the nozzle of each nozzle tube is located next to a drill bit, and the direction of the nozzle is the same as the direction pointed by the drill bit.

[0013] As an improvement to the above-mentioned drilling device, the device further includes: A single-inlet, multi-outlet air duct is fixed to the lower part of the upper cover plate; each air outlet of the single-inlet, multi-outlet air duct is connected to a nozzle pipe via an air pipe.

[0014] As an improvement to the aforementioned drilling device, the outer casing has an exhaust vent.

[0015] As an improvement to the above-mentioned drilling device, the device further includes: The flange joint is fixed at the center of the upper part of the upper cover plate; The cable outlet passes through the upper cover plate.

[0016] Compared with existing technologies, the advantages of this application are: 1. Multiple electric drills can be controlled simultaneously to drill tapered holes in the sidewall of the mounting hole in different directions. Multiple tapered holes can be drilled in one operation, which greatly improves work efficiency. 2. It can precisely control the depth of each conical hole and simultaneously drill multiple identical conical holes. It is not only suitable for drilling conical holes for carbon anodes, but also for similar scenarios where holes of the same depth need to be drilled simultaneously. Attached Figure Description

[0017] Figure 1 The image shown is a three-dimensional view of a carbon anode. Figure 2 The image shown is a top-side view of the mounting hole. Figure 3 The image shown is a longitudinal section view of the mounting hole; Figure 4 The image shown is a 3D view of the electric drill in Example 1; Figure 5 The image shown is a three-dimensional view of the flexible shaft in Example 1; Figure 6 The image shown is a perspective view of the shaft protective sleeve in Embodiment 1; Figure 7 The image shown is a perspective view of the drill bit in Example 1; Figure 8 The image shown is a 3D view of the electric drill in Example 2; Figure 9 The image shown is a 3D view of the drilling device. Figure 10 The image shown is a front view of the drilling device (with the sensor located on the front). To facilitate observation of the internal structure of the drilling device, the outer shell and telescopic dust collection cover have been removed. Figure 11 The image shown is a front view of the drilling device (the sensor is located on the left). To facilitate observation of the internal structure of the drilling device, the outer shell and telescopic dust collection cover have been removed. Figure 12 The image shown is a front view of the drilling device (the sensor is located on the right). To facilitate observation of the internal structure of the drilling device, the outer shell and telescopic dust collection cover have been removed. Figure 13 The image shown is a front view of the drilling device. To facilitate observation of the internal structure of the drilling device, the outer shell and telescopic dust extraction sleeve have been removed, leaving only one electric drill, which is located on the right side of the control system. Figure 14 The image shown is a front view of the drilling device. To facilitate observation of the internal structure of the drilling device, the outer shell and telescopic dust extraction sleeve have been removed, leaving only one electric drill, which is located on the left rear side of the control system. Figure 15 The image shown is a detailed view of the bottom of the drilling device; Figure 16 The diagram shown is a detailed representation of the signal system. Figure 17 The diagram shown is a side view of the mechanism that drives the electric drill's movement in the control system. Figure 18 The diagram shown is a detailed view (front view) of the mechanism that drives the electric drill's movement in the control system.

[0018] Attached image labels: 1. Main body 2. Connecting parts 3. Mounting holes 301, slanted groove; 302, boss. 303, tapered hole; 304, annular settling tank. 401. First motor; 402. First reducer 403. First coupling; 404. Shaft protective sleeve 405, drill bit; 406, flexible shaft 407. First reinforcing rib plate; 408. Second reinforcing rib plate 409. First bend 410. Second bend 411. Third reinforcing rib plate; 412. Universal coupling 501. Upper cover plate; 502. Lower fixing plate 503, First tie rod; 504, Flange joint 505. Cable outlet; 506. Electric drill mounting plate 507. Middle fixing plate; 508. Second tie rod 509. Outer shell; 510. Telescopic dust cover 511. Exhaust vent 601. Second motor; 602. Second reducer 603. Second coupling; 604. Screw 605, Driver board; 606, Limit plate 607. Connecting seat; 608. Transmission rod 609. Linear guide rail; 610. Positioning base 611. Guide groove 701. Nozzle pipe; 702. One inlet, multiple outlet exhaust pipe. 801, Sensor bracket; 802, First sensor 803, Second sensor; 804, Sensor sensing element Detailed Implementation

[0019] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0020] This application provides an electric drill and drilling device for drilling tapered holes in various materials, and is particularly suitable for drilling tapered holes at the connection between the carbon anode and the anode guide rod.

[0021] like Figure 1 As shown, a carbon anode typically includes a body 1 that is generally rectangular in shape. One side of the body 1 has a protruding connecting portion 2 for connecting to an anode guide rod. The connecting portion 2 has a plurality of cylindrical mounting holes 3 corresponding to the number of steel claws on the anode guide rod.

[0022] like Figure 2 and Figure 3 As shown, the mounting hole 3 is surrounded by an annular groove 304. Multiple evenly arranged oblique grooves 301 are present on the sidewall of the mounting hole 3. Several tapered holes 303 are also present on the sidewall of the mounting hole 3. The tapered holes 303 extend from the side of the mounting hole 3 in a radial direction away from the axis of the mounting hole 3. The cross-sectional diameter of the tapered holes 303 is largest at the opening and gradually decreases towards the bottom. The axis of the tapered holes 303 forms an angle of 30 to 60 degrees with the horizontal direction, preferably 45 degrees. An upwardly protruding trapezoidal boss 302 is also present at the bottom of the mounting hole 3.

[0023] Because the mold making of carbon anodes is complex, the conical hole 303 on the side wall of mounting hole 3 is usually formed by drilling after the carbon anode is made. The drill bit and drilling device improved in this application can be used for drilling the conical hole in this scenario.

[0024] Example 1 like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the electric drill provided in this application may include a first motor 401, a first reducer 402, a first coupling 403, a flexible shaft 406, and a drill bit 405 connected in sequence. The flexible shaft 406 is made of flexible material, and a rigid shaft protective sleeve 404 may be provided on its exterior. The shaft protective sleeve 404 may be a hollow tubular structure. One end of the flexible shaft 406 may be detachably and fixedly connected to the first coupling 403, and the other end may be detachably and fixedly connected to the drill bit. The shaft protective sleeve 404 may have two bends: a first bend 409 and a second bend 410. After the two bends, the included angle between the axes of the two openings at the ends of the shaft protective sleeve 404 may be a first set angle. The first set angle may be in the range of 150 degrees to 120 degrees, preferably 135 degrees. On the inner side of the first bend 409 and the second bend 410, there may be a first reinforcing rib plate 407 and a second reinforcing rib plate 408 to prevent deformation of the bent shape of the shaft protective sleeve 404. The body of drill bit 405 can be a tapered shape with sharp edges, and it can drill a tapered hole when rotated.

[0025] This application uses a flexible shaft 406 to transmit the force generated by the first motor 401 to the drill bit 405. Because the flexible shaft 406 can bend to a certain extent, it is particularly suitable for construction in relatively narrow operating spaces such as the mounting hole 3. Compared to traditional rigid drive shafts, the first motor 401 of this application does not need to maintain the same angle as the tapered hole to be drilled; drilling can be performed simply by inserting the bent flexible shaft 406 with the shaft protective sleeve 404 and the drill bit 405 into the mounting hole 3. The electric drill of this application can also be applied to drilling into the sidewalls of deeper holes.

[0026] When in use, insert the drill bit 405 into the mounting hole 3 of the carbon anode, press against the side wall of the mounting hole 3, start the first motor 401, the first motor 401 drives the drill bit 405 to rotate, and drill a tapered hole 303 that slopes downward in the mounting hole 3.

[0027] Example 2 like Figure 8 The diagram shows another embodiment of the electric drill provided in this application. Unlike embodiment 1, a universal coupling 412 is added between the first coupling 403 and the flexible shaft 406, and the first reinforcing rib 407 and the second reinforcing rib 408 are combined into a third reinforcing rib 411. The universal coupling 412 is a mature existing technology, and its structure will not be described in detail here.

[0028] The added universal coupling 412 allows for greater flexibility in the angle of the first motor 401 when transmitting rotation from the first motor 401 to the drill bit 405, enabling it to adapt to larger angular deviations from the drill bit 405. The third reinforcing rib 411, formed by the combination of the first reinforcing rib 407 and the second reinforcing rib 408, has a larger area and a more robust structure, allowing it to withstand greater external forces and making the drill bit more stable during operation.

[0029] Example 3 like Figures 9-12 As shown, this application also provides a drilling device, which houses six electric drills as shown in Embodiment 2 inside a cylindrical frame. A control system is used to uniformly control the movement of the six electric drills. A signal system is used to assist the control system in monitoring the position of the drill bit. In addition, there is an auxiliary system for cooling the drill bit and removing debris generated during drilling.

[0030] like Figure 13 and Figure 14As shown, the frame is cylindrical with a disc-shaped upper cover plate 501 on its upper surface. The upper part of the side is a cylindrical outer shell 509, and the lower part is a cylindrical telescopic dust suction sleeve 510. A flange joint 504 can be fixed to the upper center of the upper cover plate 501 for fixing the drilling device to an external facility. The upper cover plate 501 may also have a cable outlet 505. The power cord for the drill bit and control system inside the drilling device, as well as the air pipe for the auxiliary system, can exit the drilling device through the cable outlet 505. The outer shell 509 may have an exhaust port 511 to remove debris blown up by the auxiliary system. The height of the telescopic dust suction sleeve 510 is adjustable and has a certain degree of elasticity; during use, it can seal the mounting hole 3 of the carbon anode to prevent the spread of debris and powder generated by the drill bit.

[0031] Along the circumferential edge of the lower part of the upper cover plate 501, six flat-bottomed U-shaped drill mounting plates 506 can be evenly fixed at intervals. The first motor 401 and the first reducer 402 of the drill can be fixed inside the U-shape of the drill mounting plate 506, and the first coupling 403 can pass through the bottom through hole of the drill mounting plate 506. Fixing the first motor 401 and the first reducer 402 to the upper cover plate 501 provides stable support for the drill during operation, and the drilling operation can be completed by simply changing the drill bit position using the flexibility of the universal coupling 412.

[0032] Along the circumferential edge of the lower part of the upper cover plate 501, six cylindrical first tie rods 503 of the same length can be evenly fixed at intervals. A disc-shaped lower fixing plate 502 can be fixedly installed at the lower part of the six first tie rods. The plane of the lower fixing plate 502 is parallel to the plane of the upper cover plate 501. The lower fixing plate 502 can have six through openings in the radial direction, through which the shaft protective sleeves 404 of the six motors can pass and move radially along the lower fixing plate 502.

[0033] Near the center of the lower part of the upper cover plate 501, multiple second tie rods 508 can be evenly fixed. The lower part of the multiple second tie rods 508 can be fixedly connected to the middle fixing plate 507.

[0034] The control system of the drilling device may include a second motor 601, a second reducer 602, and a second coupling 603 connected in sequence. The second coupling 603 can be connected to a cylindrical screw 604. The second motor 601, the second reducer 602, and the second coupling 603 can be fixed on a central fixing plate 507, and the screw 604 can pass through a through hole in the center of the central fixing plate 507.

[0035] The control system may also include a disc-shaped drive plate 605. The drive plate 605 may have a through hole at its center, with internal threads for threaded connection to the screw 604. Two limiting discs 606 with circular holes may extend from the edge of the drive plate 605. The limiting discs 606 can be fitted onto the second pull rod 508. When the second motor 601 starts, it drives the screw 604 to rotate via the second reducer 602 and the second coupling 603, allowing the drive plate 605 to move back and forth along the axis of the screw 604. The limiting discs 606 prevent the drive plate 605 from rotating with the screw 604, ensuring that the drive plate 605 can only move along the axis of the screw 604.

[0036] like Figure 17 and Figure 18 As shown, six protruding connecting seats 607 can be evenly fixed at intervals on the bottom of the drive plate 605. Each connecting seat 607 can be pinned to one end of an H-shaped transmission rod 608. The end of the transmission rod 608 away from the connecting seat 607 can be pinned to the third reinforcing rib plate 411 of the electric drill. Two linear guide rails 609 can be fixed on both sides of the third reinforcing rib plate 411 at a second predetermined angle to the horizontal plane (the plane where the upper cover plate 501 is located is the horizontal plane). Along the circumferential edge of the upper part of the lower fixed plate 502, six pairs of wide-mouth V-shaped positioning bases 610 can be evenly fixed at intervals. One side of the V-shaped arm of the positioning base 610 can be vertically fixed to the lower fixed plate 502, and can form a third predetermined angle with the other side of the V-shaped arm. The third predetermined angle can be equal to the second predetermined angle plus 90 degrees. The second predetermined angle can be set according to the required drilling angle, usually between 30 and 60 degrees, preferably 45 degrees. The third reinforcing rib plate 411 of each electric drill can be located between a pair of positioning bases 610. Each pair of positioning bases 610 can have a guide groove 611 fixed on the V-shaped arm adjacent to the third reinforcing rib plate 411. The direction of the guide groove 611 can be the same as the length direction of the fixed V-shaped arm. The guide groove 611 on each pair of positioning bases 610 can perfectly accommodate the two linear guide rails 609 on both sides of the third reinforcing rib plate 411. When the linear guide rails 609 move along the guide groove 611, they can drive the drill bit of the electric drill to move in the length direction of the guide groove 611.

[0037] This application uses a guide groove 611 and a linear guide rail 609 in combination, so that the movement trajectory of the drill bit 405 can only move along the direction of the groove of the guide groove 611, avoiding the influence of vibration or other forces on the drilling path when the drill bit 405 is working, and ensuring that the drilling device can form a precise hole according to the design requirements.

[0038] like Figure 15As shown, six nozzle tubes 701 can be fixed on one side of the six radial openings at the lower part of the lower fixing plate 502. The nozzle of each nozzle tube 701 can be located next to a drill bit 405, and the direction of the nozzle can be the same as the direction of the drill bit.

[0039] A single-inlet, multi-outlet air vent 702 can be fixed to the lower edge of the upper cover plate 501. Each outlet of the single-inlet, multi-outlet air vent 702 can be connected to a nozzle pipe 701 via an air pipe. The air pipe of the air inlet of the single-inlet, multi-outlet air vent 702 can extend out of the drilling device from the outlet port 505. The six nozzle pipes 701 and the single-inlet, multi-outlet air vent 702 can form an auxiliary system for the drilling device.

[0040] like Figure 16 As shown, the signal system of the drilling device may include a sensor bracket 801 fixed to the drill mounting plate 506 and / or the second pull rod 508. The sensor bracket 801 may have an opening in the vertical direction, on which a first sensor 802 and a second sensor 803 may be fixed and their positions adjustable. The first sensor 802 may be positioned above the second sensor 803. A sensor sensing plate 804 may be fixed to the drive plate 605. The sensor sensing plate 804 may move up and down with the drive plate 605. When the sensor sensing plate 804 moves to the same height as the first sensor 802 or the second sensor 803, it can be sensed by the first sensor 802 or the second sensor 803. The first sensor 802 and the second sensor 803 can transmit the sensing signal to the control system, which can then start and stop the second motor 601 and the six drills based on the sensing signal.

[0041] This embodiment uses 6 electric drills, but in other embodiments, fewer or more than 6 electric drills can be configured as needed.

[0042] In the initial state, the height of the sensor plate 804 is the same as the height of the first sensor 802. At this time, the shaft protective sleeves 404 of the six electric drills are all close to the axis of the drilling device. In use, the bottom of the drilling device is placed into the mounting hole 3 of the carbon anode, so that the position of each drill bit 405 corresponds to the position of the tapered hole 303 to be drilled. When the drilling device is started, the second motor 601 and the six electric drills start simultaneously. The second motor 601 drives the screw 604 to rotate, causing the drive plate 605 to move downward. The drive plate 605 pushes the third reinforcing rib plate 411 through the connecting seat 607 and the transmission rod 608, causing the shaft protective sleeves 404 to move outward and downward. Constrained by the direction of movement of the linear guide rail 609 in the guide groove 611, the shaft protective sleeves 404 drive the drill bits to move in a direction that forms a second set angle with the horizontal direction, so that the six electric drills simultaneously drill six tapered holes 303 on the side wall of the mounting hole 3. As drill bit 405 drills, nozzle pipe 701 next to each drill bit 405 simultaneously sprays high-pressure gas into the drill bit 405, which cools the drill bit 405 and blows the debris and dust generated by the drill bit 405 out of the conical hole 303. Alternatively, an exhaust fan can be used to draw air out through the exhaust port 511 to remove debris and dust. When the drive plate 605 moves downwards, the sensor plate 804 also moves downwards. When the sensor plate 804 reaches the same height as the second sensor 803, the second sensor 803 senses the sensor plate 804 and transmits the sensing signal to the control system. After receiving the sensing signal from the second sensor 803, the control system stops the second motor 601, the six electric drills, and the six nozzle pipes 701 from blowing air. At this point, each drill bit 405 has drilled a conical hole 303 in the mounting hole 3. Then, the control system reverses the second motor 601, causing the drive plate 605 to rise, simultaneously bringing the shaft protective sleeves 404 of the six electric drills closer to the axis of the drilling device, and the drill bit 405 moves out of the conical hole 303. When the sensor plate 804 rises with the drive plate 605 to the same height as the first sensor 802, the first sensor 802 senses the sensor plate 804 and transmits the sensing signal to the control system. Upon receiving the sensing signal, the control system stops the second motor 601. Finally, the drilling device is raised, completing the drilling operation of the carbon anode conical hole 303.

[0043] The drilling device provided in this application can simultaneously control multiple electric drills to drill tapered holes in the sidewalls of mounting holes in different directions. Multiple tapered holes can be drilled in a single operation, greatly improving work efficiency. Utilizing a signal system, this application can precisely control the depth of each tapered hole, simultaneously drilling multiple identical tapered holes. This is not only suitable for drilling tapered holes for carbon anodes, but also for similar scenarios requiring the simultaneous drilling of holes at the same depth.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application, and should all be covered within the scope of the claims of this application.

Claims

1. An electric drill, characterized in that, include: The first motor (401), the first reducer (402), the first coupling (403), the flexible shaft (406) and the drill bit (405) are connected in sequence. The shaft protective sleeve (404) is made of rigid material and is sleeved on the outside of the flexible shaft (406); The shaft protective sleeve (404) has two bends; through the two bends, the included angle between the axes of the openings at both ends of the shaft protective sleeve (404) forms a first set angle.

2. The electric drill according to claim 1, characterized in that, The inner sides of the two bends respectively have a first reinforcing rib (407) and a second reinforcing rib (408) to prevent the bending shape of the shaft protective sleeve (404) from deforming.

3. The electric drill according to claim 2, characterized in that, The drill bit (405) is a cone shape with sharp edges.

4. The electric drill according to claim 2 or 3, characterized in that, A universal coupling (412) is also connected between the first coupling (403) and the flexible shaft (406). The first reinforcing rib (407) and the second reinforcing rib (408) are fused together to form the third reinforcing rib (411).

5. A drilling apparatus comprising the electric drill of claim 4, characterized in that, The drilling device includes: A cylindrical frame, internally housing multiple of the aforementioned electric drills; and A control system is used to uniformly control the start and stop of multiple electric drills and simultaneously control the movement of the drill bits (405) of multiple electric drills; The rack includes: The upper cover plate (501) is located on the upper end face of the frame; a plurality of electric drills are evenly spaced and fixed to the lower circumference edge of the upper cover plate (501); The cylindrical outer shell (509) has its upper end edge fixedly connected to the edge of the upper cover plate (501); A cylindrical telescopic dust cover (510) has its upper edge fixedly connected to the lower edge of the outer shell (509). Multiple cylindrical first tie rods (503) of the same length are fixed at their upper ends at evenly spaced intervals to the lower circumference edge of the upper cover plate (501); and A disc-shaped lower fixing plate (502) is fixed to the lower end of multiple first tie rods (503); the lower fixing plate (502) has multiple through openings in the radial direction, and the shaft protective sleeve (404) of each motor passes through one of the through openings; The control system includes: The second motor (601), the second reducer (602), and the second coupling (603), which are connected in sequence, are fixed at the lower center of the upper cover plate (501); The screw (604) is fixedly connected at one end to the second coupling (603); and A disc-shaped drive plate (605) has a through hole with internal threads in the center, which is threaded to the screw (604); the drive plate (605) extends radially to form one or more limiting discs (606) with round holes; the round holes of the limiting discs (606) are sleeved on the first pull rod (503); The bottom of the drive plate (605) is fixed with a plurality of protruding connecting seats (607) at even intervals; each connecting seat (607) is pin-connected to one end of an H-shaped transmission rod (608); the end of the transmission rod (608) away from the connecting seat (607) is pin-connected to the third reinforcing rib plate (411) of the electric drill; two linear guide rails (609) are fixed on both sides of the third reinforcing rib plate (411) at a second predetermined angle to the plane of the upper cover plate (501); along the circumferential edge of the upper part of the lower fixing plate (502), there are evenly spaced... Multiple pairs of plate-shaped positioning bases (610) are uniformly fixed; the third reinforcing rib plate (411) of each electric drill is located between a pair of positioning bases (610); a guide groove (611) is fixed on the surface of each pair of positioning bases (610) close to the third reinforcing rib plate (411); the direction of the groove of the guide groove (611) forms a second predetermined angle with the plane of the upper cover plate (501); the guide groove (611) on each pair of positioning bases (610) can just accommodate the two linear guide rails (609) on both sides of the third reinforcing rib plate (411). The number of the connecting seat (607) and the transmission rod (608) is the same as the number of the electric drill.

6. The drilling apparatus according to claim 5, characterized in that, The device further includes: The sensor bracket (801) is fixed on the frame; The first sensor (802) and the second sensor (803) are fixed in adjustable positions on the sensor bracket (801); the position of the first sensor (802) is closer to the upper cover plate (501) than that of the second sensor (803). The sensor sensing piece (804) is fixed on the drive plate (605); when the sensor sensing piece (804) moves to the same height as the first sensor (802) or the second sensor (803), the first sensor (802) or the second sensor (803) can sense the sensor sensing piece (804) and transmit the sensing signal to the control system.

7. The drilling apparatus according to claim 5, characterized in that, The device further includes: Multiple nozzle tubes (701) are fixed at one end to the lower part of the lower fixing plate (502); the nozzle of each nozzle tube (701) is located next to a drill bit (405), and the direction of the nozzle is the same as the direction pointed by the drill bit (405).

8. The drilling apparatus according to claim 7, characterized in that, The device further includes: A single-inlet multi-outlet air duct (702) is fixed to the lower part of the upper cover plate (501); each air outlet of the single-inlet multi-outlet air duct (702) is connected to a nozzle pipe (701) through an air pipe.

9. The drilling apparatus according to claim 5, characterized in that, The outer casing (509) has an exhaust vent (511).

10. The drilling apparatus according to claim 5, characterized in that, The device further includes: Flange connector (504) is fixed at the center of the upper part of the upper cover plate (501); and The cable outlet (505) passes through the upper cover plate (501).

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