Power tool apron for machining inner groove of small hole

By using a combination of telescopic slide, power plate, permanent magnet steel and electromagnetic in the power tool holder, the problem of power cannot be expanded during milling grooves of the power tool holder is solved, efficient processing of complex workpieces and hard materials is achieved, and processing stability and accuracy are improved.

CN119566833AInactive Publication Date: 2025-03-07SUZHOU GENERAL BAOWEI PRECISION MACHINERY CO LTD
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Patent Information

Application Number
CN202510081849.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-20
Publication Date
2025-03-07
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The power of the existing power tool holder cannot be expanded during milling grooves, making it difficult to ensure the machining stability and accuracy of complex and hard workpieces.

Method used

A power tool holder for small hole inner groove processing is designed, using a combination of telescopic slide, power plate, permanent magnet steel and electromagnetic device. The electromagnetic device is triggered alternately through the movement of the power plate, and the magnetic force of permanent magnet steel and electromagnetic device is used to generate thrust to increase the output force of the processing shaft.

Benefits of technology

The power expansion is achieved, the processing performance of complex workpieces and hard materials is improved, and the milling groove operation stability and accuracy of the inner wall of the small hole are ensured.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a power tool apron for machining an inner groove of a small hole, relates to the technical field of power tool aprons, and aims to solve the problems that when an existing power tool apron is used for milling a groove, power cannot be expanded, and the machining stability and precision cannot be effectively guaranteed when the existing power tool apron faces a complex and hard workpiece. A telescopic sliding seat is integrally connected to the outer surface of one side of the tool apron body, a machining shaft is slidably connected into a sliding hole of the telescopic sliding seat, a power rod is fixedly connected to the end face of the linkage rod, a power plate is fixedly connected to one end of the power rod, and the two ends of the power plate are each fixedly connected with a permanent magnet steel. The symmetrical inner walls of the tool apron body are each fixedly provided with two electromagnetic devices, and the electromagnetic devices correspond to the permanent magnet steel in position. The effects that power expansion can be conducted, and the performance of coping with complex machining occasions is improved are achieved.
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Description

Technical Field

[0001] The invention relates to the technical field of power tool holders, in particular to a power tool holder for processing inner grooves of small holes. Background Art

[0002] The power tool holder is a cutting accessory installed on the machine tool turret that can provide rotary force. It enables the tool to move longitudinally and transversely with the turret during processing, as well as to realize its own rotational motion. The power tool holder has a wide range of applications, including the processing of small hole inner grooves.

[0003] The existing power tool holder cannot expand its power when milling grooves, and the processing stability and accuracy cannot be effectively guaranteed when facing complex and hard workpieces. Summary of the invention

[0004] The purpose of the present invention is to provide a power tool holder for processing inner grooves of small holes, which can expand power and improve the performance in coping with complex processing occasions.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A power tool holder for processing the inner groove of a small hole comprises a tool holder body, a telescopic slide is integrally connected to the outer surface of one side of the tool holder body, a processing shaft is slidably connected in the slide hole of the telescopic slide, a power rod is fixedly connected to the end surface of the linkage rod, one end of the power rod is fixedly connected to a power plate, both ends of the power plate are respectively fixedly connected to a permanent magnet steel, two electromagnets are respectively fixedly installed on the symmetrical inner walls of the tool holder body, the positions of the electromagnets and the permanent magnet steels correspond, a switch is installed between the two electromagnets, and the switch is electrically connected to the electromagnets.

[0007] By adopting the above technical solution, power expansion can be carried out, output force can be provided, and the performance facing complex workpieces and hard materials can be improved.

[0008] Furthermore, a second support seat is fixedly connected to the inside of the tool holder body, and the upper end of the second support seat is rotatably connected to a second rotating shaft, one end of the second rotating shaft is fixedly connected to a linkage disk, a linkage rod is rotatably connected to the edge position of the outer surface of one side of the linkage disk, the other end of the linkage rod is rotatably connected to the end of the processing shaft, and a fourth bevel gear and an inertia wheel are externally sleeved and fixed to one end of the second rotating shaft.

[0009] By adopting the above technical solution, conventional power output can be achieved.

[0010] Furthermore, a rotating hole is provided on the outer surface of the tool holder body, and an output shaft is rotatably installed inside the rotating hole, a linkage groove is provided on the end surface of the output shaft, and a linkage shaft is inserted inside the linkage groove, a first gear is fixed to the outer sleeve of the linkage shaft, a first rotating shaft is rotatably installed on the inner end surface of the tool holder body, a second gear is fixed to the outer sleeve of the first rotating shaft, the second gear is meshingly connected to the first gear, a third bevel gear is fixedly connected to the upper end of the first rotating shaft, and the third bevel gear is meshingly connected to the fourth bevel gear.

[0011] By adopting the above technical solution, the kinetic energy of the input shaft can be transmitted to the second gear and can be flexibly switched and adjusted.

[0012] Furthermore, two electromagnetic telescopes are fixedly mounted on the inner end surface of the tool holder body, an adjustment plate is rotatably connected to the outside of the linkage shaft, and both ends of the adjustment plate are respectively fixedly connected to the telescopic ends of the two electromagnetic telescopes.

[0013] By adopting the above technical solution, the electromagnetic expander can be used to replace the movement of the adjustment plate.

[0014] Furthermore, a first support seat is fixedly connected to the inner wall of the tool holder body, a second bevel gear is rotatably mounted on one end of the first support seat, a linkage groove is arranged on the end face of the second bevel gear, and the upper end of the linkage shaft corresponds to the position of the linkage groove.

[0015] By adopting the above technical solution, it is ensured that the linkage shaft can effectively drive the second bevel gear to rotate.

[0016] Furthermore, a rotating seat is integrally connected to the outer surface of the tool holder body, a drilling shaft is rotatably installed in the rotating hole of the rotating seat, one end of the drilling shaft is fixedly connected to a first bevel gear, and the first bevel gear is meshingly connected to the second bevel gear.

[0017] By adopting the above technical solution, it is ensured that the input kinetic energy can effectively drive the drilling shaft to rotate, ensuring that the drilling operation can be carried out stably.

[0018] Furthermore, a drill bit fixing seat is installed at one end of the drilling shaft, and a milling cutter is installed at one end of the processing shaft.

[0019] By adopting the above technical solution, the inner wall of the small hole can be effectively milled.

[0020] Furthermore, a base is fixedly connected to the outer surface of one side of the tool holder body, and the base is coaxial with the output shaft. An end cover is installed on the external cover of the port of the tool holder body, an installation groove is provided on the outer surface of the end cover, and an electrical connection seat is fixedly installed inside the installation groove.

[0021] By adopting the above technical solution, it can be ensured that the power tool holder can be installed stably and firmly.

[0022] In summary, the beneficial technical effects of the present invention are:

[0023] 1. The present invention can rotate the tool holder body to switch the processing tool, and then use the processing shaft to slide back and forth inside the telescopic slide to make the milling cutter reciprocate along the axial direction of the processing shaft, so as to perform processing operations on the inner groove of the small hole. During the processing, since a power rod is fixedly connected to the end face of the processing shaft, and a power plate is fixedly connected to one end of the power rod, the movement of the processing shaft can make the power plate move along. At this time, the power plate can alternately approach the two sets of electromagnetic devices and can alternately trigger the switch trigger rod. When the switch is closed, the electromagnetic device at the corresponding position is energized, and one end of the electromagnetic device generates a magnetic force. Since permanent magnets are installed at both ends of the power plate, the positions of the permanent magnets and the electromagnetic devices correspond. At this time, the magnetic poles at one end of the permanent magnets are the same as the magnetic poles at one end of the electromagnetic device. Under the action of mutual repulsion, the electromagnetic device can generate thrust on the power plate, and can generate force on one end of the processing shaft. This can effectively improve the output force of the processing shaft, and can stably and effectively perform the milling operation on the inner wall of the small hole, avoiding insufficient output power and resulting in insufficient milling accuracy.

[0024] 2. The present invention can flexibly switch the power transmission route according to the processing needs. When drilling is required, the electromagnetic expander is extended, and the electromagnetic expander drives the position of the adjustment plate to change. Since the linkage shaft is rotatably connected to the adjustment plate, the movement energy of the adjustment plate causes one end of the linkage shaft to be inserted into the linkage groove of the second bevel gear. At the same time, the first gear is separated from the second gear as the linkage shaft moves. At this time, the kinetic energy input by the output shaft can be directly transmitted to the second bevel gear through the linkage shaft. Then, under the linkage of the first bevel gear, the drilling shaft starts to rotate. At this time, effective drilling operations can be performed. When the inner groove of the small hole needs to be processed, the electromagnetic expander is retracted. At this time, the linkage shaft is separated from the second bevel gear, and the first gear is meshed with the second gear. The kinetic energy of the output shaft can be transmitted to the milling groove structure. The entire kinetic energy transmission route can be flexibly switched, ensuring that all kinetic energy can be concentrated on processing one target, with high working stability and flexible adjustment.

[0025] 3. The present invention is equipped with a drilling shaft and a milling cutter at the same time, which can be flexibly switched according to needs during the actual processing process, thereby effectively increasing the application range of the power tool holder and effectively improving its practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 This is a first perspective view of the internal structure of the present invention;

[0028] Figure 3 A second viewing angle diagram of the internal structure of the present invention;

[0029] Figure 4 This is a third viewing angle diagram of the internal structure of the present invention.

[0030] In the figure: 1. tool holder body; 2. end cover; 3. telescopic slide; 4. machining axis; 5. milling cutter; 6. rotating seat; 7. drilling axis; 8. drill bit fixing seat; 9. base; 10. electrical connection seat; 11. first bevel gear; 12. first support seat; 13. second bevel gear; 14. linkage shaft; 15. adjustment plate; 16. first gear; 17. output shaft; 18. first rotating shaft; 19. second gear; 20. third bevel gear; 21. second support seat; 22. second rotating shaft; 23. fourth bevel gear; 24. inertia wheel; 25. linkage disk; 26. linkage rod; 27. power rod; 28. power plate; 29. ​​permanent magnet steel; 30. electromagnetic; 31. switch; 32. electromagnetic telescope.

[0031] Specific real-time method

[0032] The method of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0033] Reference Figure 1 , Figure 3 , Figure 4, a power tool holder for processing the inner groove of a small hole, comprising a tool holder body 1, a telescopic slide 3 is integrally connected to the outer surface of one side of the tool holder body 1, a processing shaft 4 is slidably connected in the sliding hole of the telescopic slide 3, a milling cutter 5 is installed at one end of the processing shaft 4, a power rod 27 is fixedly connected to the end surface of the linkage rod 26, one end of the power rod 27 is fixedly connected to a power plate 28, and both ends of the power plate 28 are respectively fixedly connected to a permanent magnet steel 29, and two electromagnetics 30 are respectively fixedly installed on the symmetrical inner walls of the tool holder body 1, the electromagnetics 30 correspond to the positions of the permanent magnet steel 29, a switch 31 is installed between the two electromagnetics 30, and the switch 31 is electrically connected to the electromagnetic 30, wherein the tool holder body 1 can be rotated to switch the processing tool, and then the processing shaft 4 is used to reciprocate inside the telescopic slide 3 to make the milling cutter 5 reciprocate along the axial direction of the processing shaft 4, so that the inner groove of the small hole can be processed. During the processing, since the power rod is fixedly connected to the end surface of the processing shaft 4 27, a power plate 28 is fixedly connected to one end of the power rod 27, so the movement energy of the processing shaft 4 can make the power plate 28 move with it, at this time, the power plate 28 can alternately approach the two groups of electromagnetic devices 30, and at the same time can alternately trigger the switch 31 trigger rod, when the switch 31 is closed, the electromagnetic device 30 at the corresponding position is energized, and one end of the electromagnetic device 30 generates a magnetic force, and because permanent magnets 29 are installed at both ends of the power plate 28, the position of the permanent magnets 29 corresponds to that of the electromagnetic devices 30, at this time, the magnetic poles at one end of the permanent magnets 29 are the same as the magnetic poles at one end of the electromagnetic devices 30, under the action of mutual repulsion, the electromagnetic devices 30 can generate thrust on the power plate 28, and can generate force on one end of the processing shaft 4, which can effectively improve the output force of the processing shaft 4, can stably and effectively perform the milling operation on the inner wall of the small hole, and avoid insufficient output power, resulting in insufficient milling accuracy, wherein the inner wall of the sliding hole of the telescopic slide 3 is sprayed with a self-lubricating nano coating, which can effectively improve the overall service life.

[0034] Reference Figure 23, a second support seat 21 is fixedly connected to the inside of the tool holder body 1, and a second rotating shaft 22 is rotatably connected to the upper end of the second support seat 21, and a linkage disk 25 is fixedly connected to one end of the second rotating shaft 22, and a linkage rod 26 is rotatably connected to the edge position of the outer surface of one side of the linkage disk 25, and the other end of the linkage rod 26 is rotatably connected to the end of the processing shaft 4, and a fourth bevel gear 23 and an inertia wheel 24 are externally sleeved and fixed to one end of the second rotating shaft 22, wherein the rotation of the fourth bevel gear 23 drives the second rotating shaft 22 to rotate, and since the linkage disk 25 is fixedly connected to one end of the second rotating shaft 22, the linkage disk 25 starts to rotate at this time, and since the two ends of the linkage rod 26 are respectively rotatably connected to the linkage disk 25 and the processing shaft 4, the rotation of the linkage disk 25 can effectively drive the processing shaft 4 to reciprocate, and provide conventional power for the groove milling process. During the rotation of the second rotating shaft 22, the inertia wheel 24 follows the rotation, and the rotation of the inertia wheel 24 can effectively improve the stability of the rotation of the linkage disk 25, thereby improving the stability of the groove milling process.

[0035] Reference Figure 2A rotating hole is provided on the outer surface of the tool holder body 1, and an output shaft 17 is rotatably installed inside the rotating hole. A linkage groove is provided on the end surface of the output shaft 17, and a linkage shaft 14 is inserted inside the linkage groove. A first gear 16 is fixedly sleeved on the outer side of the linkage shaft 14. A first rotating shaft 18 is rotatably installed on the inner end surface of the tool holder body 1, and a second gear 19 is fixedly sleeved on the outer side of the first rotating shaft 18. The second gear 19 is meshed and connected with the first gear 16, and the upper end of the first rotating shaft 18 is fixedly connected with a third bevel gear 2 0, the third bevel gear 20 is meshed with the fourth bevel gear 23, two electromagnetic telescopes 32 are fixedly installed on the inner end surface of the tool holder body 1, the outer side of the linkage shaft 14 is rotatably connected with an adjustment plate 15, and the two ends of the adjustment plate 15 are respectively fixedly connected with the telescopic ends of the two electromagnetic telescopes 32, and the inner wall of the tool holder body 1 is fixedly connected with a first support seat 12, and one end of the first support seat 12 is rotatably installed with a second bevel gear 13, and a linkage groove is provided on the end surface of the second bevel gear 13, and the upper end of the linkage shaft 14 is connected with the linkage The slot positions correspond to each other, wherein the power transmission route can be flexibly switched according to processing needs. When drilling is required, the electromagnetic retractor 32 is extended, and the electromagnetic retractor 32 drives the position of the adjusting plate 15 to change. Since the linkage shaft 14 is rotationally connected to the adjusting plate 15, the movement energy of the adjusting plate 15 causes one end of the linkage shaft 14 to be inserted into the linkage slot of the second bevel gear 13. At the same time, the first gear 16 is separated from the second gear 19 as the linkage shaft 14 moves. At this time, the kinetic energy input by the output shaft 17 can be directly transmitted to the second bevel gear 13 through the linkage shaft 14. Then, under the linkage of the first bevel gear 11, the drilling shaft 7 starts to rotate. At this time, effective drilling operations can be performed. When the inner groove of the small hole needs to be processed, the electromagnetic retractor 32 is retracted. At this time, the linkage shaft 14 is separated from the second bevel gear 13, and the first gear 16 is meshed with the second gear 19. The kinetic energy of the output shaft 17 can be transmitted to the milling groove structure. The entire kinetic energy transmission route can be flexibly switched, ensuring that all kinetic energy can be concentrated on processing one target, with high working stability and flexible adjustment.

[0036] Reference Figure 1 2, a rotating seat 6 is integrally connected to the outer surface of the tool holder body 1, a drilling shaft 7 is rotatably installed in the rotating hole of the rotating seat 6, a drill bit fixing seat 8 is installed at one end of the drilling shaft 7, a first bevel gear 11 is fixedly connected to one end of the drilling shaft 7, the first bevel gear 11 is meshingly connected with the second bevel gear 13, wherein the second bevel gear 13 can be utilized to drive the first bevel gear 11 to rotate, thereby driving the drilling shaft 7 to rotate, and at this time, the drill bit installed inside the drill bit fixing seat 8 can be driven to rotate, thereby realizing a stable drilling operation.

[0037] Referring to Figure 1, a base 9 is fixedly connected to the outer surface of one side of the tool holder body 1, and the base 9 is coaxial with the output shaft 17. An end cover 2 is installed on the external cover of the port of the tool holder body 1. A mounting groove is provided on the outer surface of the end cover 2, and an electrical connection seat 10 is fixedly installed inside the mounting groove. The power tool holder can be conveniently installed on the tool table through the base 9, and the circuit connection can be conveniently performed, and the subsequent disassembly and maintenance operations can be facilitated.

[0038] Working principle: When in use, first install the power tool holder on the tool table, and then flexibly switch the power transmission route according to the processing needs. When drilling is required, extend the electromagnetic telescope 32, and the electromagnetic telescope 32 drives the adjustment plate 15 to change its position. Since the linkage shaft 14 is rotationally connected to the adjustment plate 15, the movement energy of the adjustment plate 15 causes one end of the linkage shaft 14 to be inserted into the linkage groove of the second bevel gear 13. At the same time, the first gear 16 is separated from the second gear 19 as the linkage shaft 14 moves. At this time, the kinetic energy input by the output shaft 17 can be directly transmitted to the second bevel gear 13 through the linkage shaft 14, and then the first bevel gear 11 is rotated. Under linkage, the drilling shaft 7 starts to rotate, and effective drilling operation can be performed at this time. When it is necessary to process the inner groove of the small hole, the electromagnetic expander 32 is retracted. At this time, the linkage shaft 14 is separated from the second bevel gear 13, and the first gear 16 is meshed with the second gear 19. The kinetic energy of the output shaft 17 can be transmitted to the first rotating shaft 18. The rotation of the first rotating shaft 18 drives the third bevel gear 20 to rotate. Since the third bevel gear 20 is meshed and connected with the fourth bevel gear 23, the fourth bevel gear 23 starts to rotate at this time. The rotation of the fourth bevel gear 23 drives the second rotating shaft 22 to rotate. Since the linkage disk 25 is fixedly connected to one end of the second rotating shaft 22, the linkage disk 25 starts to rotate at this time. The two ends of the linkage rod 26 are respectively connected to the linkage disk 25 and the processing shaft 4 for rotation, so the rotation of the linkage disk 25 can effectively drive the processing shaft 4 to reciprocate, and provide conventional power for the groove milling process. During the rotation of the second rotating shaft 22, the inertia wheel 24 rotates accordingly. The rotation of the inertia wheel 24 can effectively improve the stability of the rotation of the linkage disk 25, thereby improving the stability of the groove milling process. During the groove milling process, when it is necessary to expand the power, since a power rod 27 is fixedly connected to the end face of the processing shaft 4, and a power plate 28 is fixedly connected to one end of the power rod 27, the movement energy of the processing shaft 4 can make the power plate 28 As the movement occurs, the power plate 28 can alternately approach the two groups of electromagnets 30, and can alternately trigger the switch 31 trigger rod. When the switch 31 is closed, the electromagnet 30 at the corresponding position is energized, and one end of the electromagnet 30 generates a magnetic force. Since permanent magnets 29 are installed at both ends of the power plate 28, the positions of the permanent magnets 29 and the electromagnets 30 correspond. At this time, the magnetic pole at one end of the permanent magnet 29 is the same as the magnetic pole at one end of the electromagnet 30. Under the action of mutual repulsion, the electromagnet 30 can generate a thrust on the power plate 28, and can further generate a force on one end of the machining axis 4. This can effectively increase the output force of the machining axis 4 and improve the working stability.

[0039] The real-time examples of this specific real-time method are all preferred real-time examples of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A powered tool holder for machining inner grooves of small holes, comprising a tool holder body (1), characterized in that: A telescopic slide (3) is integrally connected to the outer surface of one side of the tool holder body (1), and a processing shaft (4) is slidably connected in the sliding hole of the telescopic slide (3). A power rod (27) is fixedly connected to the end surface of the linkage rod (26), and one end of the power rod (27) is fixedly connected to a power plate (28). Both ends of the power plate (28) are respectively fixedly connected to a permanent magnet (29). Two electromagnetic devices (30) are respectively fixedly installed on the symmetrical inner walls of the tool holder body (1), and the positions of the electromagnetic devices (30) and the permanent magnets (29) correspond. A switch (31) is installed between the two electromagnetic devices (30), and the switch (31) is electrically connected to the electromagnetic device (30).

2. The power tool holder for machining inner groove of a small hole according to claim 1, characterized in that: A second support seat (21) is fixedly connected inside the tool holder body (1); the upper end of the second support seat (21) is rotatably connected to a second rotating shaft (22); one end of the second rotating shaft (22) is fixedly connected to a linkage disk (25); a linkage rod (26) is rotatably connected to an edge position of an outer surface of one side of the linkage disk (25); the other end of the linkage rod (26) is rotatably connected to the end of the processing shaft (4); and a fourth bevel gear (23) and an inertia wheel (24) are externally sleeved and fixed to one end of the second rotating shaft (22).

3. The power tool holder for machining inner groove of a small hole according to claim 2, characterized in that: A rotating hole is provided on the outer surface of the knife seat body (1), and an output shaft (17) is rotatably mounted inside the rotating hole; a linkage groove is provided on the end surface of the output shaft (17), and a linkage shaft (14) is inserted inside the linkage groove; a first gear (16) is fixedly sleeved on the outer side of the linkage shaft (14); a first rotating shaft (18) is rotatably mounted on the inner end surface of the knife seat body (1); a second gear (19) is fixedly sleeved on the outer side of the first rotating shaft (18); the second gear (19) is meshingly connected to the first gear (16); a third bevel gear (20) is fixedly connected to the upper end of the first rotating shaft (18), and the third bevel gear (20) is meshingly connected to the fourth bevel gear (23).

4. The power tool holder for machining inner groove of a small hole according to claim 3, characterized in that: Two electromagnetic telescopes (32) are fixedly mounted on the inner end surface of the tool holder body (1); an adjustment plate (15) is rotatably connected to the outside of the linkage shaft (14); and both ends of the adjustment plate (15) are respectively fixedly connected to the telescopic ends of the two electromagnetic telescopes (32).

5. The power tool holder for machining inner groove of a small hole according to claim 3, characterized in that: A first support seat (12) is fixedly connected to the inner wall of the knife seat body (1); a second bevel gear (13) is rotatably mounted on one end of the first support seat (12); a linkage groove is provided on the end surface of the second bevel gear (13); and the upper end of the linkage shaft (14) corresponds to the position of the linkage groove.

6. The power tool holder for machining inner groove of a small hole according to claim 5, characterized in that: A rotating seat (6) is integrally connected to the outer surface of the tool holder body (1), a drilling shaft (7) is rotatably installed in the rotating hole of the rotating seat (6), one end of the drilling shaft (7) is fixedly connected to a first bevel gear (11), and the first bevel gear (11) is meshingly connected to the second bevel gear (13).

7. The power tool holder for machining inner groove of a small hole according to claim 6, characterized in that: A drill bit fixing seat (8) is installed at one end of the drilling shaft (7), and a milling cutter (5) is installed at one end of the processing shaft (4).

8. The power tool holder for machining inner groove of a small hole according to claim 3, characterized in that: A base (9) is fixedly connected to the outer surface of one side of the tool holder body (1), and the base (9) and the output shaft (17) are coaxial, and an end cover (2) is installed on the outer cover of the port of the tool holder body (1), and a mounting groove is provided on the outer surface of the end cover (2), and an electrical connection seat (10) is fixedly installed inside the mounting groove.