Tapping and drilling integrated drill bit

Abstract

The invention relates to the field of medical instruments, and discloses a tapping and drilling integrated drill bit which comprises a shell, an inner drill bit body, an outer drill bit body and a driving mechanism. The inner drill bit is used for drilling, the inner drill bit comprises a drill rod and a drilling part, the drill rod is rotatably installed on the shell, one end of the drilling part is fixed to the drill rod, and the other end of the drilling part is provided with a cutting edge; the outer drill bit is used for tapping, the outer drill bit comprises a sleeve rod and a tapping part, the sleeve rod is rotatably installed on the shell, one end of the tapping part is fixed to the sleeve rod, the diameter of the inner drill bit is smaller than that of the outer drill bit, the inner drill bit coaxially penetrates through the outer drill bit, and the cutting edge extends to the outer portion of one side of the tapping part; the driving mechanism is installed in the shell and used for driving the inner drill bit and the outer drill bit to rotate, and the rotating speed of the inner drill bit is higher than that of the outer drill bit. According to the technical scheme, tapping and drilling can be integrated, the complexity degree of an operation can be reduced, use of operation tools is reduced, and the risk of tapping dislocation can also be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a tapping and drilling integrated drill bit. Background Art

[0002] Drilling threaded holes is a common procedure in orthopedic surgery. For example, doctors performing spinal correction surgeries, denture replacements, joint fixation surgeries, and bone fracture fixation surgeries all require threaded holes, which are then used to screw instruments or fixtures into the patient's bones. The surgeon first uses a punch drill bit to create a threaded base hole in the patient's bone. The drill then uses a tapping drill bit to tap the hole, forming threads on the inner circumference of the hole.

[0003] In the prior art, drilling and tapping are performed in two separate steps, resulting in a long operation time, complicated work steps, and multiple tools. Furthermore, there is a risk of misalignment during tapping, which increases surgical risks. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a drilling and tapping integrated drill bit to solve the problem pointed out in the background technology that the drilling operation and tapping operation in the prior art are carried out in two steps, which is relatively cumbersome and has high surgical risks.

[0005] The present invention solves the above technical problems through the following technical means:

[0006] A tapping and drilling integrated drill bit, comprising:

[0007] case;

[0008] An inner drill bit, the inner drill bit is used for drilling holes, the inner drill bit comprises a drill rod and a drilling portion, the drill rod is rotatably mounted on the housing, one end of the drilling portion is fixed to the drill rod, and the other end has a cutting edge;

[0009] an outer drill bit for tapping, the outer drill bit comprising a sleeve rod and a tapping portion, the sleeve rod being rotatably mounted on the housing, one end of the tapping portion being fixed to the sleeve rod, the inner drill bit having a smaller diameter than the outer drill bit, the inner drill bit coaxially penetrating the outer drill bit, and the cutting edge extending to the outside of one side of the tapping portion; and

[0010] A driving mechanism is installed in the housing and is used to drive the inner drill bit and the outer drill bit to rotate.

[0011] In a possible implementation, the driving mechanism includes:

[0012] A reduction gearbox, the reduction gearbox being installed in the housing;

[0013] A reduction assembly, which is installed in the reduction gear box and is drivingly connected to the inner drill bit and the outer drill bit; and

[0014] The motor is installed in the reduction box and is in transmission connection with the reduction transmission assembly.

[0015] In one possible embodiment, the reduction assembly includes a primary reduction assembly and a secondary reduction assembly, the primary reduction assembly is transmission-connected between the motor and the inner drill bit, the secondary reduction assembly is transmission-connected between the primary reduction assembly and the outer drill bit, and the rotational speed of the inner drill bit is higher than that of the outer drill bit.

[0016] In a possible implementation, the primary reduction assembly includes a first gear, a second gear, a third gear, a fourth gear, a first rotating shaft, and a second rotating shaft;

[0017] The first rotating shaft and the second rotating shaft are both rotatably mounted in the reduction gear box, the first gear is mounted on the shaft of the motor, the second gear and the third gear are mounted on the first rotating shaft, the fourth gear is mounted on the second rotating shaft, and one end of the second rotating shaft is drivingly connected to the inner drill bit;

[0018] The first gear and the second gear are meshed with each other, and the number of teeth of the first gear is smaller than the number of teeth of the second gear;

[0019] The third gear and the fourth gear are meshed with each other, and the number of teeth of the third gear is smaller than that of the fourth gear.

[0020] In a possible embodiment, the inner drill bit further includes a connecting key fixed to an end of the drill rod away from the drilling portion, and one end of the second rotating shaft is provided with a connecting hole adapted to the connecting key.

[0021] In a possible implementation, the secondary reduction assembly includes a fifth gear, a sixth gear, a seventh gear, an eighth gear and a third rotating shaft;

[0022] The third rotating shaft is rotatably mounted in the reduction gear box, the fifth gear is mounted on the second rotating shaft, the sixth gear and the seventh gear are mounted on the third rotating shaft, and the eighth gear is drivingly connected to the outer drill bit;

[0023] The fifth gear and the sixth gear are meshed with each other, and the number of teeth of the fifth gear is smaller than the number of teeth of the sixth gear;

[0024] The seventh gear and the eighth gear are meshed with each other, and the number of teeth of the seventh gear is smaller than that of the eighth gear.

[0025] In a possible embodiment, the system further includes a tubular output shaft, the output shaft being rotatably mounted in the housing, and the eighth gear being mounted on the output shaft;

[0026] The sleeve rod of the outer drill bit can be partially inserted into the output shaft, and a connecting notch is provided at one end of the sleeve rod away from the tapping portion, and a connecting block adapted to the connecting notch is provided in the output shaft.

[0027] In a possible implementation manner, a spacer sleeve is further included, and the spacer sleeve is installed between the housing and the output shaft.

[0028] In a possible embodiment, the invention further comprises a locking sleeve, wherein the locking sleeve is slidably sleeved on the output shaft along the axial direction, and an elastic reset member is installed on the locking sleeve;

[0029] The output shaft is provided with a plurality of through holes, in which steel balls are movably installed, and a part of the structure of the steel balls can be moved out of the through holes, and the sleeve rod of the outer drill bit is provided with an annular groove adapted to fit the steel balls;

[0030] When the locking sleeve contacts the steel ball, the steel column can be squeezed into the annular groove.

[0031] In a possible embodiment, a cavity for installing a battery is provided in the shell, and a shell bottom cover is detachably mounted on an open end of the cavity.

[0032] Beneficial effects of the present invention:

[0033] 1. By adopting the technical solution of the present application, when the doctor performs the drilling operation, the driving mechanism can be used to drive the inner drill bit and the outer drill bit to rotate respectively. First, the inner drill bit drills a threaded bottom hole, and then the outer drill bit taps the threaded bottom hole, thereby realizing integrated tapping and drilling. This can not only reduce the complexity of the operation and the use of surgical tools, but also reduce the risk of tapping dislocation.

[0034] 2. By adopting the technical solution of the present application, the rotation speed of the outer drill bit is lower than that of the inner drill bit. The rotation speed of the inner drill bit is faster, which is convenient for efficiently drilling the threaded bottom hole, while the rotation speed of the outer drill bit is slower, which makes the outer drill bit more stable when tapping, reduces the risk of damaging the patient's bones, and has higher safety performance.

[0035] 3. By adopting the technical solution of the present application, when the locking sleeve squeezes the steel column into the annular groove, the inner drill bit and the outer drill bit are installed on the shell; when the inner drill bit and the outer drill bit need to be removed, the locking sleeve can be moved toward the side of the compression elastic reset part to make the locking sleeve detach from the steel ball. At this time, the inner drill bit and the outer drill bit can be taken out, which is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic structural diagram of a tapping and drilling integrated drill bit according to an embodiment of the present application;

[0037] Figure 2is a cross-sectional view of a tapping and drilling integrated drill bit according to an embodiment of the present application;

[0038] Figure 3 This is an embodiment of the present application Figure 2 A magnified schematic diagram of point A in the middle;

[0039] Figure 4 This is a schematic structural diagram of the inner drill bit and the outer drill bit in an embodiment of the present application;

[0040] Figure 5 This is an embodiment of the present application Figure 2 A magnified schematic diagram of point B in the middle;

[0041] Among them, 100, shell; 110, bottom cover of the shell; 200, inner drill bit; 210, drill rod; 220, drilling part; 221, cutting edge; 230, connecting key; 300, outer drill bit; 310, sleeve rod; 311, connecting notch; 320, tapping part; 410, reducer; 420, motor; 430, first-stage reduction assembly; 431, first gear; 432, second gear; 433, third gear; 434, fourth gear; 435, first rotating shaft; 436, second rotating shaft; 440, second-stage reduction assembly; 441, fifth gear; 442, sixth gear; 443, seventh gear; 444, eighth gear; 445, third rotating shaft; 500, output shaft; 510, steel ball; 600, spacer; 700, locking sleeve; 800, battery. DETAILED DESCRIPTION

[0042] The following describes the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and are only schematic diagrams, not actual drawings. They should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the dimensions of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the figures.

[0043] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "up", "down", "left", "right", "front", "back", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the figure. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the figures are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0044] like Figure 1-Figure 5 As shown, an embodiment of the present application provides a drilling and tapping integrated drill bit, comprising a housing 100, an inner drill bit 200, an outer drill bit 300, and a drive mechanism. The inner drill bit 200 is used for drilling holes and comprises a drill rod 210 and a drilling portion 220. The drill rod 210 is rotatably mounted on the housing 100. The body of the drilling portion 220 is also rod-shaped, with a diameter smaller than that of the drill rod 210. One end of the drilling portion 220 is fixed to the drill rod 210, and the other end has a cutting edge 221 capable of drilling holes. The outer drill bit 300 is used for tapping. The outer drill bit 300 comprises a sleeve rod 310 and a tapping portion 320. The sleeve rod 310 is rotatably mounted on the housing 100. One end of the tapping portion 320 is fixed to the sleeve rod 310, and the surface of the tapping portion 320 is provided with threads for tapping. The inner drill bit 200 has a smaller diameter than the outer drill bit 300 and coaxially extends through the outer drill bit 300. A passage for the inner drill bit 200 is defined within the sleeve rod 310 and the tapping portion 320. The inner diameter of the sleeve rod 310 is the same as the diameter of the drill rod 210, and the inner diameter of the tapping portion 320 is the same as the diameter of the drilling portion 220. The drilling portion 220 of the drilling portion 220 can extend to the exterior of one side of the tapping portion 320. A drive mechanism is mounted within the housing 100 and is used to rotate the inner and outer drill bits 200 and 300. The rotational speed of the inner drill bit 200 is higher than that of the outer drill bit 300.

[0045] Through the above-mentioned technical solution, when the doctor performs the drilling operation, the driving mechanism can be used to drive the inner drill bit 200 and the outer drill bit 300 to rotate respectively. First, the inner drill bit 200 drills a threaded bottom hole, and then the outer drill bit 300 taps the threaded bottom hole, thereby realizing integrated tapping and drilling. This can not only reduce the complexity of the operation and the use of surgical tools, but also reduce the risk of tapping dislocation.

[0046] In one possible embodiment, the drive mechanism includes a reduction gearbox 410, a reduction gear assembly, and a motor 420. The reduction gearbox 410 is fixedly mounted within the housing 100. The reduction gear assembly is mounted within the reduction gearbox 410 and is in transmission connection with the inner drill bit 200 and the outer drill bit 300. The motor 420 is mounted within the reduction gearbox 410 and is in transmission connection with the reduction gear transmission assembly. The motor 420 may be a servo motor 420 or a stepper motor 420. The power of the motor 420 is transmitted to the inner drill bit 200 and the outer drill bit 300 via the reduction gear assembly, thereby controlling the rotational speed and driving the inner drill bit 200 and the outer drill bit 300 to rotate.

[0047] In one possible embodiment, the reduction assembly includes a primary reduction assembly 430 and a secondary reduction assembly 440. The primary reduction assembly 430 is transmission-connected between the motor 420 and the inner drill bit 200, and the secondary reduction assembly 440 is transmission-connected between the primary reduction assembly 430 and the outer drill bit 300. The rotational speed of the inner drill bit 200 is higher than that of the outer drill bit 300. Through the interaction between the primary reduction assembly 430 and the secondary reduction assembly 440, the rotational speed of the outer drill bit 300 is lower than that of the inner drill bit 200. The faster rotational speed of the inner drill bit 200 facilitates efficient drilling of the threaded bottom hole, while the slower rotational speed of the outer drill bit 300 enables the outer drill bit 300 to tap more smoothly, reducing the risk of damaging the patient's bone and providing higher safety performance.

[0048] In one possible embodiment, the primary reduction assembly 430 includes a first gear 431, a second gear 432, a third gear 433, a fourth gear 434, a first rotating shaft 435, and a second rotating shaft 436. The first rotating shaft 435 and the second rotating shaft 436 are both rotatably mounted within the reduction box 410 via bearings. The first gear 431 is mounted on the shaft of the motor 420, the second gear 432 and the third gear 433 are mounted on the first rotating shaft 435, and the fourth gear 434 is mounted on the second rotating shaft 436. One end of the second rotating shaft 436 is in driving connection with the inner drill bit 200. The first gear 431 and the second gear 432 mesh with each other, and the number of teeth on the first gear 431 is smaller than that on the second gear 432. The third gear 433 and the fourth gear 434 mesh with each other, and the number of teeth on the third gear 433 is smaller than that on the fourth gear 434. Through the mutual cooperation of the first gear 431 , the second gear 432 , the third gear 433 , the fourth gear 434 , the first rotating shaft 435 and the second rotating shaft 436 , the first stage deceleration of the driving mechanism is realized, and the power of the motor 420 is decelerated and transmitted to the inner drill bit 200 .

[0049] In addition, in order to facilitate the transmission connection between the second rotating shaft 436 and the inner drill bit 200, in a possible embodiment, the inner drill bit 200 also includes a connecting key 230 fixed to the end of the drill rod 210 away from the drilling portion 220, and one end of the second rotating shaft 436 is provided with a connecting hole adapted for the connecting key 230. When the connecting key 230 is inserted into the connecting hole, the inner drill bit 200 can be driven to rotate coaxially through the second rotating shaft 436.

[0050] In one possible embodiment, the two-stage reduction assembly 440 includes a fifth gear 441, a sixth gear 442, a seventh gear 443, an eighth gear 444, and a third rotating shaft 445. The third rotating shaft 445 is rotatably mounted within the reduction gearbox 410 via a bearing. The fifth gear 441 is mounted on the second rotating shaft 436, and the sixth and seventh gears 442, 443, are mounted on the third rotating shaft 445. The eighth gear 444 is in driving connection with the outer drill bit 300, such that rotation of the eighth gear 444 drives the outer drill bit 300. The fifth gear 441 and the sixth gear 442 mesh with each other, and the number of teeth on the fifth gear 441 is smaller than that on the sixth gear 442. The seventh gear 443 and the eighth gear 444 mesh with each other, and the number of teeth on the seventh gear 443 is smaller than that on the eighth gear 444. Through the mutual cooperation of the fifth gear 441, the sixth gear 442, the seventh gear 443, the eighth gear 444 and the third rotating shaft 445, the secondary deceleration of the driving mechanism is realized, and the power of the primary deceleration assembly 430 is further decelerated and transmitted to the outer drill bit 300, so that the rotation speed of the outer drill bit 300 is lower than the rotation speed of the inner drill bit 200.

[0051] Furthermore, to facilitate transmission connection between the eighth gear 444 and the outer drill bit 300, one possible embodiment further includes a tubular output shaft 500, which is rotatably mounted within the housing 100, and the eighth gear 444 is mounted on the output shaft 500. The sleeve rod 310 of the outer drill bit 300 can be partially inserted into the output shaft 500. The sleeve rod 310, distal from the tapping portion 320, is provided with a plurality of connecting notches 311. A connecting block is provided within the output shaft 500 to fit within the connecting notches 311. When the sleeve rod 310 is inserted into the output shaft 500 and the connecting block is inserted into the connecting notches 311, the outer drill bit 300 can be driven to rotate coaxially via the output shaft 500.

[0052] In a possible embodiment, a spacer sleeve 600 is further included, and the spacer sleeve 600 is installed between the housing 100 and the output shaft 500. The spacer sleeve 600 makes the connection between the structures tighter, thereby improving the stability of the structure.

[0053] In a possible embodiment, in order to facilitate the disassembly and replacement of the inner drill bit 200 and the outer drill bit 300, a locking sleeve 700 is further included, and the locking sleeve 700 is slidably mounted on the output shaft 500 along the axial direction, and an elastic reset member is installed on the locking sleeve 700. The elastic reset member is mainly a spring, and the spring can be installed between the locking sleeve 700 and the housing 100, and can also be installed between the locking sleeve 700 and the spacer 600. A plurality of through holes are provided on the output shaft 500, and steel balls 510 are movably installed in the through holes, and part of the structure of the steel balls 510 can be moved outside the through holes. It should be noted that the part of the structure of the steel balls 510 that can be moved outside the through holes here means that part of the structure of the steel balls 510 can be moved to the inside and outside of the output shaft 500. The sleeve rod 310 of the outer drill bit 300 is provided with an annular groove adapted to the steel ball 510 ; when the locking sleeve 700 contacts the steel ball 510 , the steel column can be squeezed to the inner side of the output shaft 500 and enter the annular groove of the outer drill bit 300 .

[0054] Through the above technical solution, when the locking sleeve 700 squeezes the steel column into the annular groove of the outer drill bit 300, the inner drill bit 200 and the outer drill bit 300 are installed on the housing 100; when the inner drill bit 200 and the outer drill bit 300 need to be removed, the locking sleeve 700 can be moved toward the side of the compression elastic reset member to make the locking sleeve 700 separate from the steel ball 510. At this time, the steel ball 510 can move in the through hole, and the inner drill bit 200 and the outer drill bit 300 can be taken out, which is convenient to operate.

[0055] It should be noted that because the diameter of the drill rod 210 on the inner drill bit 200 is larger than the diameter of the drilling portion 220, and the channel of the outer drill bit 300 is adapted to the dimensions of the drill rod 210 and the drilling portion 220, the removal of the inner drill bit 200 is restricted by the outer drill bit 300. In other words, the inner drill bit 200 can only be removed after the locking sleeve 700 releases the restriction on the outer drill bit 300.

[0056] In a possible embodiment, a cavity for installing the battery 800 is provided in the housing 100, and a housing bottom cover 110 is detachably installed at the open end of the cavity of the housing 100. The detachable battery 800 provides power to the motor 420.

[0057] In another embodiment, the motor 420 may be powered by plugging in an electrical outlet.

[0058] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalents shall be encompassed by the claims of the present invention. Any techniques, shapes, and structures not described in detail herein are well known.

Claims

1. A tapping and drilling drill bit, characterized in that: include: Housing (100); An inner drill bit (200), the inner drill bit (200) being used for drilling holes, the inner drill bit (200) comprising a drill rod (210) and a drilling portion (220), the drill rod (210) being rotatably mounted on a housing (100), one end of the drilling portion (220) being fixed to the drill rod (210), and the other end of the drilling portion (220) having a cutting blade (221); An outer drill bit (300), the outer drill bit (300) is used for tapping, the outer drill bit (300) comprises a sleeve rod (310) and a tapping portion (320), the sleeve rod (310) is rotatably mounted on the housing (100), one end of the tapping portion (320) is fixed to the sleeve rod (310), the diameter of the inner drill bit (200) is smaller than the diameter of the outer drill bit (300), the inner drill bit (200) coaxially penetrates the outer drill bit (300), and the cutting edge (221) extends to the outside of one side of the tapping portion (320); as well as A driving mechanism is installed in the housing (100) and is used to drive the inner drill bit (200) and the outer drill bit (300) to rotate, wherein the rotation speed of the inner drill bit (200) is higher than that of the outer drill bit (300).

2. The tapping and drilling integrated drill bit according to claim 1, characterized in that: The driving mechanism comprises: A reduction box (410), wherein the reduction box (410) is installed in the housing (100); A reduction assembly, the reduction assembly being installed in a reduction box (410) and being drivingly connected to the inner drill bit (200) and the outer drill bit (300); and The motor (420) is installed in the reduction box (410) and is transmission-connected to the reduction transmission assembly.

3. The tapping and drilling integrated drill bit according to claim 2, characterized in that: The reduction assembly comprises a primary reduction assembly (430) and a secondary reduction assembly (440); the primary reduction assembly (430) is transmission-connected between the motor (420) and the inner drill bit (200); the secondary reduction assembly (440) is transmission-connected between the primary reduction assembly (430) and the outer drill bit (300); and the rotation speed of the inner drill bit (200) is higher than that of the outer drill bit (300).

4. The tapping and drilling integrated drill bit according to claim 3, characterized in that: The primary reduction assembly (430) includes a first gear (431), a second gear (432), a third gear (433), a fourth gear (434), a first rotating shaft (435) and a second rotating shaft (436); The first rotating shaft (435) and the second rotating shaft (436) are both rotatably mounted in the reduction box (410), the first gear (431) is mounted on the shaft of the motor (420), the second gear (432) and the third gear (433) are mounted on the first rotating shaft (435), the fourth gear (434) is mounted on the second rotating shaft (436), and one end of the second rotating shaft (436) is drivingly connected to the inner drill bit (200); The first gear (431) and the second gear (432) are meshed with each other, and the number of teeth of the first gear (431) is smaller than the number of teeth of the second gear (432); The third gear (433) and the fourth gear (434) are meshed with each other, and the number of teeth of the third gear (433) is smaller than the number of teeth of the fourth gear (434).

5. The tapping and drilling integrated drill bit according to claim 4, characterized in that: The inner drill bit (200) further comprises a connecting key (230) fixed to an end of the drill rod (210) away from the drilling portion (220), and one end of the second rotating shaft (436) is provided with a connecting hole adapted to fit the connecting key (230).

6. The tapping and drilling integrated drill bit according to claim 4, characterized in that: The secondary reduction assembly (440) includes a fifth gear (441), a sixth gear (442), a seventh gear (443), an eighth gear (444) and a third rotating shaft (445); The third rotating shaft (445) is rotatably mounted in the reduction box (410), the fifth gear (441) is mounted on the second rotating shaft (436), the sixth gear (442) and the seventh gear (443) are mounted on the third rotating shaft (445), and the eighth gear (444) is drivingly connected to the outer drill bit (300); The fifth gear (441) and the sixth gear (442) are meshed with each other, and the number of teeth of the fifth gear (441) is smaller than the number of teeth of the sixth gear (442); The seventh gear (443) and the eighth gear (444) are meshed with each other, and the number of teeth of the seventh gear (443) is smaller than the number of teeth of the eighth gear (444).

7. The tapping and drilling integrated drill bit according to claim 6, characterized in that: It also includes a tubular output shaft (500), the output shaft (500) is rotatably mounted in the housing (100), and the eighth gear (444) is mounted on the output shaft (500); The sleeve rod (310) of the outer drill bit (300) can be partially inserted into the output shaft (500), and a connecting notch (311) is provided at one end of the sleeve rod (310) away from the tapping portion (320), and a connecting block adapted to the connecting notch (311) is provided in the output shaft (500).

8. The tapping and drilling integrated drill bit according to claim 7, characterized in that: The invention also comprises a spacer (600), wherein the spacer (600) is installed between the housing (100) and the output shaft (500).

9. The tapping and drilling integrated drill bit according to claim 8, characterized in that: It also includes a locking sleeve (700), the locking sleeve (700) being slidably sleeved on the output shaft (500) along the axial direction, and an elastic reset member being installed on the locking sleeve (700); The output shaft (500) is provided with a plurality of through holes, in which steel balls (510) are movably installed, and a part of the structure of the steel balls (510) can be moved outside the through holes, and a ring groove adapted to fit the steel balls (510) is provided on the sleeve rod (310) of the outer drill bit (300); When the locking sleeve (700) contacts the steel ball (510), the steel column can be squeezed into the annular groove.

10. The tapping and drilling drill bit according to any one of claims 1 to 9, characterized in that: A cavity for installing a battery (800) is provided in the housing (100), and a housing bottom cover (110) is detachably mounted on an open end of the cavity of the housing (100).

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