Ultrasonic cutting machine spindle and ultrasonic cutting machine

Abstract

The present application relates to the field of machine tool equipment, and specifically to an ultrasonic cutting machine spindle and an ultrasonic cutting machine, wherein the ultrasonic cutting machine spindle comprises a shaft body and a cooling unit; the shaft body is provided with a tool connection section, a first small diameter section, a second small diameter section and a transmission section in sequence from one end to the other end, the tool connection section is suitable for connecting with the tool, an ultrasonic vibrator is provided on the tool, and a wireless power transmission unit for supplying power to the ultrasonic vibrator is provided at the first small diameter section and the second small diameter section; the transmission section is suitable for rotationally connecting with the bearing and transmission-connected with the driver to realize the rotation of the shaft body; the cooling unit comprises a covering shell and a coolant, the covering shell is connected at the first small diameter section and the second small diameter section of the shaft body, and is located between the shaft body and the wireless power transmission unit, and can form a receiving chamber suitable for receiving the coolant between the shaft body and the covering shell. The ultrasonic cutting machine spindle of the present application is not easy to overheat and has a long service life.

Description

Technical Field

[0001] The present application belongs to the field of machine tool equipment, and in particular, relates to a spindle of an ultrasonic cutting machine, and further, also relates to an ultrasonic cutting machine. Background Art

[0002] Ultrasonic cutting equipment uses an ultrasonic vibrator to apply vibration to the cutting tool, thereby improving the cutting ability of the cutting tool and achieving a faster cutting speed.

[0003] Most existing ultrasonic cutting tools are long strips of tools, and use an ultrasonic vibrator to apply reciprocating vibrations along the length of the tool to improve the cutting ability. However, the principle of this type of tool is essentially to create a greater pressure to achieve cutting, which is not suitable for cutting some hard materials such as ceramics and glass.

[0004] In the prior art, for cutting materials such as ceramics and glass, a circular tool (cutting disk) is usually selected, and the workpiece to be cut is ground by rotating the circular tool to achieve the purpose of cutting. In order to realize the ultrasonic vibration of this type of tool, some technologies often use wireless power transmission to power the ultrasonic vibration device, so that the receiving coil, the tool and the ultrasonic vibration device can rotate synchronously, while the transmission coil does not rotate, so as to solve the problem that the tool is difficult to rotate when using wires for power transmission. However, the use of wireless power transmission will cause the iron spindle that drives the tool to rotate to be electromagnetically heated, and the greater the power of the wireless power transmission, the more serious the heating of the spindle. If air cooling is used, the cooling effect will be poor because the spindle is blocked by the coil.

[0005] In view of this, it is necessary to provide an ultrasonic cutting machine spindle and an ultrasonic cutting machine. Summary of the invention

[0006] In order to improve the above-mentioned defects, the present application provides an ultrasonic cutting machine spindle and an ultrasonic cutting machine.

[0007] The first aspect of the present application provides an ultrasonic cutting machine spindle, which adopts the following technical solution.

[0008] A main shaft of an ultrasonic cutting machine comprises a shaft body and a cooling unit; the shaft body is provided with a tool connecting section, a first small diameter section, a second small diameter section and a transmission section in sequence from one end to the other end, the tool connecting section is suitable for being connected to a tool, the tool is provided with an ultrasonic vibrator, and a wireless power transmission unit for supplying power to the ultrasonic vibrator is provided at the first small diameter section and the second small diameter section; the transmission section is suitable for being rotatably connected to a bearing and being transmission-connected to a driver so as to realize the rotation of the shaft body; the cooling unit comprises a covering shell and a coolant, the covering shell is connected to the first small diameter section and the second small diameter section on the shaft body, and is located between the shaft body and the wireless power transmission unit, and can form a accommodating cavity suitable for accommodating the coolant between the shaft body and the covering shell.

[0009] By adopting the above technical solution, the design of the first small diameter section and the second small diameter section can make the distance between the shaft body here and the coil of the wireless transmission unit larger, and it is not easy to generate electromagnetic heating phenomenon, and the cooling unit can also cool the main shaft here by liquid cooling. The cooling effect is good, which can make the main shaft less likely to overheat, thereby ensuring that the main shaft has a long service life.

[0010] Specifically, the first small diameter segment and the second small diameter segment are both recessed toward the axis of the shaft body, and the diameter of the first small diameter segment first gradually decreases and then gradually increases along the axial direction of the shaft body, while the diameter of the second small diameter segment first gradually decreases and then gradually increases along the axial direction of the shaft body.

[0011] By adopting the above technical solution, it is possible to prevent serious stress concentration from occurring at the first small-diameter section and the second small-diameter section, thereby ensuring that the main shaft has a longer service life.

[0012] Furthermore, the covering shell is divided into two identical half shells along its own axial direction, each of the half shells includes a chamber section and a shell connecting section connected to both ends of the chamber section, one of the two shell connecting sections is suitable for connecting to a side of the first small diameter section close to the tool connecting section, and the other is suitable for connecting to a side of the second small diameter section close to the transmission section, and the two half shells can be snapped together after being connected to the shaft body to form the accommodating cavity.

[0013] By adopting the above technical solution, the assembly between the cooling unit and the main shaft can be easily achieved.

[0014] Furthermore, a portion of the shaft body connected to the two shell connecting sections is uniformly provided with a plurality of threaded hole structures along the axial direction of the shaft body, and the two shell connecting sections are provided with matching connecting holes so as to be threadedly connected with the shaft body.

[0015] By adopting the above technical solution, the cooling unit can be easily disassembled and maintained, and the arrangement of the threaded hole structure can ensure the stability of the main shaft rotation.

[0016] Furthermore, a large diameter section is provided between the first small diameter section and the second small diameter section, a plurality of threaded hole structures are evenly distributed on the outer circumference of the large diameter section, and a matching connecting hole is provided on the chamber section so as to be threadedly connected with the large diameter section.

[0017] By adopting the above technical solution, it can be ensured that the covering shell is not prone to serious deformation and coolant leakage when following the high-speed rotation of the main shaft.

[0018] Furthermore, an elastic seal is provided on the abutting surface between the two half shells that are in abutment with each other; a seal is provided between each of the shell connecting sections and the shaft body, and a seal is provided between the chamber section and the large diameter section.

[0019] By adopting the above technical solution, the coolant can be prevented from leaking easily.

[0020] Furthermore, a coolant replacement port is provided on the chamber section of each of the half shells, and when the two half shells are abutted and engaged, the two coolant replacement ports are located on the same plane perpendicular to the axis of the shaft body and are symmetrically arranged about the axis of the shaft body.

[0021] By adopting the above technical solution, the coolant can be easily replaced and the stability of the main shaft rotation can be ensured.

[0022] The present application also provides an ultrasonic cutting machine, which adopts the following technical solution.

[0023] An ultrasonic cutting machine comprises a rotation drive assembly, a tool assembly, a wireless power transmission unit and the ultrasonic cutting machine spindle described in the above technical solution; the tool assembly is connected to the tool connection section, and the tool assembly comprises a tool and an ultrasonic vibrator; the rotation drive assembly comprises a bearing seat and a driver, and the transmission section is rotationally connected to the bearing seat and transmission-connected to the driver; the wireless power transmission unit is arranged at the first small diameter section and the second small diameter section, and the cooling unit is arranged between the shaft body and the wireless power transmission unit, the wireless power transmission unit comprises a power transmission coil and a power receiving coil, the power receiving coil is arranged at the first small diameter section and rotates synchronously with the shaft body, and the power transmission coil is arranged at the second small diameter section, and the power transmission coil does not rotate with the shaft body.

[0024] By adopting the above technical solution, the main shaft of the ultrasonic cutting machine is not prone to overheating, has a long service life, and its cutter can perform ultrasonic vibration, so the cutting effect is good.

[0025] Furthermore, the tool assembly also includes a clamp, which is connected to the tool connecting section. The tool is a circular ring structure and is clamped in the clamp. The ultrasonic vibrator is connected to the tool and can apply reciprocating vibration to the tool along the diameter direction of the tool, and the ultrasonic vibrator is electrically connected to the receiving coil.

[0026] By adopting the above technical solution, the blade part of the tool can reciprocate in the direction of approaching and moving away from the workpiece to be cut when the tool rotates, so that a gap can be formed between the tool and the workpiece to be cut that is conducive to the discharge of cutting debris and the entry of lubricating fluid, thereby making the tool's cutting ability higher and less prone to tool jamming or tool overheating.

[0027] Furthermore, the power receiving coil is connected to the fixture or to the covering shell; and the power transmission coil is connected to the bearing seat.

[0028] By adopting the above technical solution, the free rotation of the tool can be achieved, thereby realizing cutting processing.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. The design of the first small diameter section and the second small diameter section can make the distance between the shaft body and the coil of the wireless transmission unit larger, so that it is not easy to generate electromagnetic heat. The cooling unit can also cool the spindle here by liquid cooling, which has a good cooling effect and can make the spindle not easy to overheat, thereby ensuring that the spindle has a long service life;

[0031] 2. The ultrasonic vibrator is connected to the tool and can apply reciprocating vibrations along the diameter direction of the tool to the tool, so that the blade part of the tool can reciprocate in the direction of approaching and moving away from the workpiece to be cut, thereby forming a gap between the tool and the workpiece to be cut to facilitate the discharge of cutting debris and the entry of lubricating fluid, which can make the tool have a higher cutting ability and is less likely to cause tool jamming or overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a top view of an ultrasonic cutting machine of the present application.

[0033] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.

[0034] Figure 3 yes Figure 2 Magnified view of area B.

[0035] Figure 4It is a three-dimensional structural schematic diagram of an ultrasonic cutting machine of the present application.

[0036] Figure numerals: 1. shaft; 11. tool connecting section; 12. first small diameter section; 13. second small diameter section; 14. transmission section; 15. large diameter section; 2. cooling unit; 21. covering shell; 211. half shell; 2111. chamber section; 2112. shell connecting section; 2113. coolant replacement port; 22. coolant; 23. elastic seal; 3. rotation drive assembly; 31. bearing seat; 32. driver; 4. tool assembly; 41. tool; 42. ultrasonic vibrator; 43. fixture; 5. wireless transmission unit; 51. transmission coil; 52. receiving coil. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-4 This application is described in further detail.

[0038] The first aspect of the present application discloses a main shaft of an ultrasonic cutting machine.

[0039] Reference Figure 1 and Figure 2 , a main shaft of an ultrasonic cutting machine, comprising a shaft body 1 and a cooling unit 2; specifically, the shaft body 1 is provided with a tool connecting section 11, a first small diameter section 12, a second small diameter section 13 and a transmission section 14 in sequence from one end to the other end, wherein the tool connecting section 11 is suitable for connecting with a tool 41, an ultrasonic vibrator 42 is provided on the tool 41, and a wireless power transmission unit 5 for supplying power to the ultrasonic vibrator 42 is provided at the first small diameter section 12 and the second small diameter section 13; the transmission section 14 is suitable for being rotatably connected to the bearing and being transmission-connected to the driver 32 so as to realize the rotation of the shaft body 1; the cooling unit 2 specifically comprises a covering shell 21 and a coolant 22, the covering shell 21 is connected to the first small diameter section 12 and the second small diameter section 13 on the shaft body 1, and is located between the shaft body 1 and the wireless power transmission unit 5, and can form a accommodating cavity suitable for accommodating the coolant 22 between the shaft body 1 and the covering shell 21.

[0040] It is understandable that the main shaft is generally made of iron. Therefore, during operation, the current in the power transmission coil 51 and the power receiving coil 52 of the wireless transmission unit 5 will cause the iron main shaft to produce magnetic induction heating, thereby making the temperature of the main shaft higher. The design of the first small diameter section 12 and the second small diameter section 13 can make the distance between the shaft body 1 and the coil of the wireless transmission unit 5 larger, and it is not easy to produce electromagnetic induction heating. The cooling unit 2 can also cool the main shaft here by liquid cooling, and the cooling effect is good, which can make the main shaft less likely to overheat, thereby ensuring that the main shaft has a longer service life.

[0041] Specifically, refer to Figure 2 and Figure 3 In one embodiment of the ultrasonic cutting machine spindle of the present application, the first small diameter section 12 and the second small diameter section 13 are both recessed toward the axis of the shaft body 1, and the diameter of the first small diameter section 12 and the diameter of the second small diameter section 13 are first gradually reduced and then gradually increased along the axial direction of the shaft body 1, and the cross-section of the first small diameter section 12 and the second small diameter section 13 along the axial direction of the shaft body 1 can preferably be set to a concave arc surface, so that serious stress concentration is not likely to occur at the first small diameter section 12 and the second small diameter section 13, which can ensure that the spindle has a longer service life.

[0042] Specifically, refer to Figure 3 and Figure 4 In one embodiment of the ultrasonic cutting machine spindle of the present application, the covering shell 21 can be divided into two identical half shells 211 along its own axial direction, each half shell 211 includes a chamber section 2111 and a shell connecting section 2112 connected to both ends of the chamber section 2111, one of the two shell connecting sections 2112 is suitable for connecting to the side of the first small diameter section 12 close to the tool connecting section 11, and the other is suitable for connecting to the side of the second small diameter section 13 close to the transmission section 14, and the two half shells 211 can be buckled after being connected to the shaft body 1 to form a accommodating cavity that can include the first small diameter section 12 and the second small diameter section 13, so that the first small diameter section 12 and the second small diameter section 13 that are most susceptible to electromagnetic heating can be liquid-cooled to ensure the service life of the spindle, The design of the above-mentioned covering shell 21 can facilitate the assembly between the cooling unit 2 and the main shaft, and it should be noted that the covering shell 21 needs to rotate synchronously with the main shaft. Therefore, in order to make the covering shell 21 have sufficient strength so that the covering shell 21 can withstand the centrifugal force of the coolant 22 in the accommodating chamber during rotation, the covering shell 21 is preferably a steel shell, and even if the covering shell 21 is electromagnetically heated, the coolant 22 in the accommodating chamber can also cool the covering shell 21 well. In addition, an elastic seal 23 needs to be provided on the abutting surface between the two half shells 211, and a corresponding seal (not shown in the figure) needs to be provided between the shell connecting section 2112 and the shaft body 1 to prevent the coolant 22 from leaking easily.

[0043] Further, refer to Figure 1 and Figure 4 In one embodiment of the ultrasonic cutting machine spindle of the present application, the portion of the shaft body 1 connected to the two shell connecting sections 2112 is evenly distributed with multiple threaded hole structures along the axial direction of the shaft body 1, for example, 6, and the two shell connecting sections 2112 are provided with matching connecting holes, so that the covering shell 21 and the shaft body 1 can be screwed together through the cooperation of bolts and the threaded hole structure, thereby facilitating the disassembly and maintenance of the cooling unit 2, and the arrangement of the threaded hole structure can ensure the stability of the spindle rotation.

[0044] Further, refer to Figure 2 and Figure 3 In one embodiment of the ultrasonic cutting machine spindle of the present application, a large diameter section 15 is further provided between the first small diameter section 12 and the second small diameter section 13, and a plurality of threaded hole structures, for example, 6, are evenly distributed on the outer circumference of the large diameter section 15, and a matching connection hole is provided on the chamber section 2111, so that the bolt and the threaded hole structure can be matched to realize the screw connection between the covering shell 21 and the large diameter section 15. This design can provide a restraining force to the covering shell 21 by the large diameter section 15 to prevent the covering shell 21 from moving away from the axis of the spindle, so that the covering shell 21 can be 1 is not easy to be deformed under the centrifugal force of the coolant 22, resulting in unstable rotation and leakage of the coolant 22 from the accommodating chamber; and when the covering shell 21 is assembled on the main shaft, the strength loss of the first small diameter section 12 and the second small diameter section 13 can be compensated by the covering shell 21, so that the overall strength of the ultrasonic cutting machine main shaft is higher; it can be understood that the coolant 22 can be water or cooling oil, and a seal (not shown in the figure) needs to be provided between the chamber section 2111 and the large diameter section 15 to prevent the coolant 22 from leaking.

[0045] Further, refer to Figure 3 In one embodiment of the ultrasonic cutting machine spindle of the present application, at least one coolant replacement port 2113 is provided on the chamber section 2111 of each half shell 211, for example, one coolant replacement port 2113 is provided at the corresponding position of the first small diameter section 12 and the second small diameter section 13, and the coolant replacement port 2113 can be a threaded hole, so that the coolant replacement port 2113 can be sealed by a bolt to prevent coolant leakage, and when the two half shells 211 are abutted and buckled, the corresponding two coolant replacement ports 2113 are in the same direction perpendicular to the shaft body 1. Two coolant replacement ports 2113 are arranged on the surface of the axis and symmetrically about the axis of the shaft body 1. The two coolant replacement ports 2113 are symmetrically arranged about the axis of the shaft body 1 so that when the coolant 22 in the accommodating cavity is replaced, one of the two coolant replacement ports 2113 discharges the coolant 22 and the other facilitates air to enter the accommodating cavity, so as to speed up the discharge speed of the coolant 22, thereby speeding up the replacement speed of the coolant 22. The two coolant replacement ports 2113 can make the main shaft more stable during rotation.

[0046] The second aspect of the present application discloses an ultrasonic cutting machine, which adopts the following technical solution.

[0047] Reference Figure 1An ultrasonic cutting machine comprises a rotation drive assembly 3, a tool assembly 4, a wireless transmission unit 5 and the ultrasonic cutting machine spindle described in the above technical scheme; wherein the tool assembly 4 is connected to the tool connecting section 11, and the tool assembly 4 specifically comprises a tool 41, an ultrasonic vibrator 42 and a clamp 43; the rotation drive assembly 3 comprises a bearing seat 31 and a driver 32, the transmission section 14 is rotationally connected to the bearing seat 31, and is transmission-connected to the driver 32, the wireless transmission unit 5 is arranged at the first small diameter section 12 and the second small diameter section 13, and the cooling unit 2 is arranged between the shaft body 1 and the wireless transmission unit 5.

[0048] Specifically, the clamp 43 is connected to the tool connecting section 11, the tool 41 is a circular ring structure and is clamped in the clamp 43, the ultrasonic vibrator 42 is connected to the tool 41, and can apply reciprocating vibration to the tool 41 along the diameter direction of the tool 41, so that the blade part of the tool 41 can reciprocate in the direction of approaching and moving away from the workpiece to be cut when the tool 41 rotates, thereby forming a gap between the tool 41 and the workpiece to be cut that is conducive to the discharge of cutting debris and the entry of lubricating fluid, thereby making the cutting ability of the tool 41 higher and less prone to tool jamming or overheating of the tool 41; it can be understood that the ultrasonic vibrator 42 can be set to multiple and evenly arranged along the axial direction of the shaft body 1 to ensure the stability of the shaft body 1 when it rotates.

[0049] The wireless transmission unit 5 includes a transmission coil 51 and a receiving coil 52. The receiving coil 52 is arranged at the first small diameter section 12, and the transmission coil 51 is arranged at the second small diameter section 13. The receiving coil 52 can be fixedly connected to the clamp 43 or the covering shell 21 to maintain synchronous rotation with the ultrasonic vibrator 42 and be electrically connected to the ultrasonic vibrator 42. The transmission coil 51 is fixedly connected to the bearing seat 31, so that it can be empty at the second small diameter section 13, so that it can not rotate synchronously with the ultrasonic vibrator 42, thereby realizing the free rotation of the tool 41, and then realizing cutting processing.

[0050] The implementation principle of the ultrasonic cutting machine of the embodiment of the present application is: the design of the first small diameter section 12 and the second small diameter section 13 can make the distance between the shaft body 1 here and the coil of the wireless transmission unit 5 larger, and it is not easy to generate electromagnetic heating phenomenon, and the cooling unit 2 can also cool the main shaft here by liquid cooling, and the cooling effect is good, which can make the main shaft not easy to overheat, thereby ensuring that the main shaft has a longer service life.

[0051] The ultrasonic vibrator 42 is connected to the tool 41 and can apply reciprocating vibrations to the tool 41 along the diameter direction of the tool 41, so that the blade portion of the tool 41 can reciprocate in the direction of approaching and moving away from the workpiece to be cut, thereby forming a gap between the tool 41 and the workpiece to be cut to facilitate the discharge of cutting debris and the entry of lubricating fluid, thereby making the cutting ability of the tool 41 higher and preventing the tool 41 from getting stuck or overheating.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ultrasonic cutting machine spindle, characterized in that: The invention comprises a shaft (1) and a cooling unit (2); the shaft (1) is provided with a tool connecting section (11), a first small diameter section (12), a second small diameter section (13) and a transmission section (14) in sequence from one end to the other end; the tool connecting section (11) is suitable for connecting with a tool; an ultrasonic vibrator is provided on the tool; a wireless power transmission unit for supplying power to the ultrasonic vibrator is provided at the first small diameter section (12) and the second small diameter section (13); the transmission section (14) is suitable for connecting with a bearing for rotation and is transmission-connected to the driver so as to realize the rotation of the shaft (1); the cooling unit (2) comprises a covering shell (21) and a cooling liquid (22); the covering shell (21) is connected to the first small-diameter section (12) and the second small-diameter section (13) on the shaft (1), and is located between the shaft (1) and the wireless power transmission unit, and is capable of forming a receiving cavity suitable for receiving the cooling liquid (22) between the shaft (1) and the covering shell (21); The first small-diameter section (12) and the second small-diameter section (13) are both recessed toward the axis of the shaft body (1), and the diameter of the first small-diameter section (12) first gradually decreases and then gradually increases along the axial direction of the shaft body (1), while the diameter of the second small-diameter section (13) first gradually decreases and then gradually increases along the axial direction of the shaft body (1).

2. The ultrasonic cutting machine spindle according to claim 1, characterized in that: The covering shell (21) is divided into two identical half shells (211) along its own axial direction, and each of the half shells (211) comprises a chamber section (2111) and a shell connecting section (2112) connected to both ends of the chamber section (2111), one of the two shell connecting sections (2112) is suitable for connecting to a side of the first small diameter section (12) close to the tool connecting section (11), and the other is suitable for connecting to a side of the second small diameter section (13) close to the transmission section (14), and the two half shells (211) can be buckled after being connected to the shaft body (1) to form the accommodating cavity.

3. The ultrasonic cutting machine spindle according to claim 2, characterized in that: The portion of the shaft body (1) connected to the two shell connecting sections (2112) is evenly distributed with a plurality of threaded hole structures along the axial direction of the shaft body (1), and the two shell connecting sections (2112) are provided with matching connecting holes so as to be threadedly connected to the shaft body (1).

4. The ultrasonic cutting machine spindle according to claim 3, characterized in that: A large diameter section (15) is also provided between the first small diameter section (12) and the second small diameter section (13), a plurality of threaded hole structures are evenly distributed on the outer peripheral surface of the large diameter section (15), and a matching connecting hole is provided on the chamber section (2111) so as to be threadedly connected to the large diameter section (15).

5. The ultrasonic cutting machine spindle according to claim 4, characterized in that: An elastic sealing member (23) is provided on the abutting surfaces between the two half shells (211) that are in abutment with each other; a sealing member is provided between each shell connecting section (2112) and the shaft body (1), and a sealing member is provided between the chamber section (2111) and the large diameter section (15).

6. An ultrasonic cutting machine spindle according to any one of claims 2 to 5, characterized in that: A coolant replacement port (2113) is provided on the chamber section (2111) of each of the half shells (211), and when the two half shells (211) are abutted and engaged, the two coolant replacement ports (2113) are located on the same plane perpendicular to the axis of the shaft body (1) and are symmetrically arranged about the axis of the shaft body (1).

7. An ultrasonic cutting machine, characterized in that: The invention comprises a rotation drive assembly (3), a tool assembly (4), a wireless transmission unit (5) and a main shaft of an ultrasonic cutting machine according to any one of claims 1 to 6; the tool assembly (4) is connected to the tool connecting section (11), and the tool assembly (4) comprises a tool (41) and an ultrasonic vibrator (42); the rotation drive assembly (3) comprises a bearing seat (31) and a driver (32), the transmission section (14) is rotationally connected to the bearing seat (31) and is transmission-connected to the driver (32); the wireless transmission unit The element (5) is arranged at the first small diameter section (12) and the second small diameter section (13), and the cooling unit (2) is arranged between the shaft (1) and the wireless power transmission unit (5). The wireless power transmission unit (5) comprises a power transmission coil (51) and a power receiving coil (52). The power receiving coil (52) is arranged at the first small diameter section (12) and rotates synchronously with the shaft (1). The power transmission coil (51) is arranged at the second small diameter section (13), and the power transmission coil (51) does not rotate with the shaft (1).

8. The ultrasonic cutting machine according to claim 7, characterized in that: The tool assembly (4) further comprises a clamp (43), wherein the clamp (43) is connected to the tool connecting section (11); the tool (41) is a circular ring structure and is clamped in the clamp (43); the ultrasonic vibrator (42) is connected to the tool (41) and is capable of applying reciprocating vibration along the diameter direction of the tool (41) to the tool (41); and the ultrasonic vibrator (42) is electrically connected to the power receiving coil (52).

9. The ultrasonic cutting machine according to claim 8, characterized in that: The receiving coil (52) is connected to the clamp (43) or to the covering shell (21); the transmitting coil (51) is connected to the bearing seat (31).

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