Ultrasonic spindle

Abstract

An ultrasonic spindle, comprising a spindle body (100), a spindle core (200), an ultrasonic wave generation assembly (300), a mounting assembly (400) and a wireless sensing module (500), wherein the spindle body (100) is provided with a gas intake hole (120), the ultrasonic wave generation assembly (300) comprises a transducer (310), a first cooling channel (301) is defined between the mounting assembly (400) and the outer wall of the transducer (310), and the gas intake hole (120) is used for introducing a cooling gas. The cooling gas can enter the first cooling channel to cool the transducer. The ultrasonic spindle has a simple overall structure, and can prevent vibration energy transmission instability caused by an excessive temperature rise of the transducer, which affects the efficiency of electric energy transmission, thereby ensuring the working reliability of the spindle, and improving the working efficiency of the ultrasonic spindle.

Description

Ultrasonic spindle Technical Field

[0001] This application relates to the field of precision machining technology, and in particular to an ultrasonic spindle. Background Technology

[0002] An ultrasonic spindle consists of an ultrasonic transducer and a transducer. The ultrasonic transducer transmits ultrasonic vibrations to the cutting tool, using high-frequency vibrations to generate minute displacements. This creates minute shearing forces at the tool-workpiece contact surface, enabling high-precision machining of the feed material, such as cutting and drilling. It is also suitable for machining micro-holes and deep holes in non-metallic and hard / brittle materials. However, the ultrasonic transducer in an ultrasonic spindle generates heat, which becomes more pronounced with increasing energy and power. Currently, related technologies lack cooling structures for the transducer, and this heat directly impacts the spindle's operating efficiency.

[0003] Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an ultrasonic spindle capable of cooling the transducer and wireless sensing module, thereby improving the working efficiency of the ultrasonic spindle.

[0005] According to the ultrasonic spindle in the embodiments of this application, it includes:

[0006] The spindle body has a first mounting cavity inside, and the side wall of the spindle body is also provided with an air inlet that communicates with the first mounting cavity. The air inlet is used to introduce cooling gas.

[0007] The shaft is housed within the first mounting cavity;

[0008] An ultrasonic generating assembly includes a transducer connected to one end of the shaft core and partially housed within the first mounting cavity;

[0009] The mounting assembly is connected to one end of the spindle body and located on the outer periphery of the oscillator to define a first cooling channel between itself and the outer wall of the oscillator, the first cooling channel communicating with the air inlet.

[0010] The ultrasonic spindle according to the embodiments of this application has at least the following beneficial effects:

[0011] In this application, the cooling gas can be introduced into the first cooling channel through the air inlet to cool the oscillator. The overall structure is simple, low in cost, and has a reliable cooling function. It can also avoid unstable vibration energy transmission caused by excessive temperature rise of the oscillator, which affects the power transmission efficiency, thus ensuring the reliability of the spindle and improving the working efficiency of the ultrasonic spindle.

[0012] In one embodiment of this application, the ultrasonic spindle further includes a wireless sensing module, which is installed on the outer wall of the spindle core and located radially between the spindle core and the spindle body. A second cooling channel is defined between the wireless sensing module and the spindle body, and the second cooling channel is connected to the air inlet.

[0013] In one embodiment of this application, the air inlet is connected to an air source that provides an air curtain seal for the ultrasonic spindle.

[0014] In one embodiment of this application, the air inlet extends radially along the spindle body, and the spindle body further has a first axial air inlet channel communicating with the first cooling channel and a second axial air inlet channel communicating with the second cooling channel. The first axial air inlet channel and the second axial air inlet channel extend axially along the spindle body and are respectively connected to the two opposite sides of the air inlet.

[0015] In one embodiment of this application, the wireless sensing module includes a wireless power receiving module and a wireless power supply module arranged radially spaced along the main shaft body. The wireless power supply module is located on the outer periphery of the wireless power receiving module, and the gap between the wireless power supply module and the wireless power receiving module and / or the outer periphery of the wireless power supply module communicates with the air inlet.

[0016] In one embodiment of this application, the wireless sensing module includes a wireless power receiving module and a wireless power supply module disposed along the axial direction of the spindle body. The wireless power receiving module includes a power receiving housing and a power receiving unit disposed within the power receiving housing. The wireless power supply module includes a power supply housing and a power supply unit disposed within the power supply housing. The outer periphery of the power receiving housing and / or the power supply housing is provided with a groove, and the groove defines a second cooling channel between itself and the inner wall of the spindle body.

[0017] In one embodiment of this application, the spindle body is provided with an exhaust channel along the axial direction, the groove is configured as annular, and multiple grooves are provided along the axial direction of the spindle body. The outer peripheral wall of the power receiving housing and / or the power supply housing is provided with a notch, and adjacent grooves along the axial direction of the spindle body are connected through the notch.

[0018] Alternatively, the groove may be spiral-shaped, and the groove may connect the air intake and the exhaust passage respectively.

[0019] In one embodiment of this application, the mounting assembly includes an end cap and a gear disk distributed axially along the spindle body, and the first cooling channel includes a first channel segment and a second channel segment that are connected to each other. The first channel segment is defined between the end cap and the vibrator, and the second channel segment is defined between the gear disk and the vibrator.

[0020] The end cap is connected between the end of the main shaft body and the gear disk. The end cap has a third axial air intake channel, a first radial air intake channel and an air storage groove. The air storage groove extends circumferentially along the end cap. The first radial air intake channel communicates with the air intake hole through the third axial air intake channel. The first channel section communicates with the first radial air intake channel through the air storage groove.

[0021] In one embodiment of this application, the end cap further includes an air distribution groove arranged axially along the shaft core, the first radial air intake channel is connected to the air distribution groove through the air storage groove, and the air distribution groove is connected to the first channel segment.

[0022] In one embodiment of this application, the gear disk has a first end face, the vibrator includes a first connecting portion and a second connecting portion connected to the periphery of the first connecting portion, the second connecting portion has a second end face, a radial ventilation channel is defined between the first end face and the second end face, the first connecting portion passes through the interior of the gear disk and defines an axial ventilation channel extending along the axial direction, the radial ventilation channel communicates with the axial ventilation channel and forms the second channel segment.

[0023] In one embodiment of this application, the gear disk includes a first axial protrusion and a second axial protrusion protruding toward the end cover relative to the first end face. The first axial protrusion is circumferentially disposed on the outer periphery of the second axial protrusion and is in clearance fit with the end cover. The second axial protrusion is in clearance fit with the second connecting portion.

[0024] In one embodiment of this application, the outer periphery of the second axial protrusion is further provided with a plurality of radial mating portions, and a plurality of axial mating portions are provided between the first axial protrusion and the second axial protrusion. An axial venting groove and a radial venting groove are defined between adjacent radial mating portions and between adjacent axial mating portions, respectively. The second connecting portion includes a plurality of protrusions disposed opposite to the axial mating portions, and a through groove disposed opposite to the radial venting groove is defined between adjacent protrusions.

[0025] In one embodiment of this application, the gear disk includes a protruding ring that protrudes toward the end cover relative to the first end face, the protruding ring having a ventilation hole, and the second connecting portion including a plurality of protrusions that protrude toward the gear disk and are arranged circumferentially along the main shaft body, a through groove defining a space between adjacent protrusions, the through groove communicating with the axial ventilation channel through the ventilation hole.

[0026] In one embodiment of this application, the gear disk has a protruding boss on the side facing away from the end cover. The boss is arranged around the outer periphery of the vibrator. The vibrator has a second receiving cavity for mounting the tool holder. A portion of the inner wall of the boss and the outer wall of the vibrator define the axial ventilation channel, and another portion is used for clearance fit with the tool holder.

[0027] In one embodiment of this application, the ultrasonic spindle further includes a tool changing mechanism and a tool pulling mechanism. The ultrasonic generating assembly is provided with a tool handle, and the spindle core is provided with a pull rod. One end of the pull rod is connected to the tool pulling mechanism, and the other end is connected to the tool changing mechanism. The tool changing mechanism and the tool handle are detachably engaged.

[0028] And / or,

[0029] The ultrasonic spindle also includes a gap adjustment component connected to the spindle body. The gap adjustment component can drive the wireless power supply module of the wireless sensing module to move closer to or further away from the wireless power receiving module of the wireless sensing module, thereby adjusting the gap between the wireless power supply module and the wireless power receiving module.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0032] Figure 1 is a cross-sectional view of an embodiment of the ultrasonic spindle of this application;

[0033] Figure 2 is a cross-sectional view of Figure 1 after the drawbar mechanism and tool changing mechanism are hidden;

[0034] Figure 3 is an enlarged view of point A in Figure 1;

[0035] Figure 4 is a schematic diagram of one embodiment of the power receiving housing or power supply housing;

[0036] Figure 5 is a schematic diagram of another embodiment of the power supply housing;

[0037] Figure 6 is a cross-sectional view of another embodiment of the ultrasonic spindle;

[0038] Figure 7 is a CC cross-sectional view in Figure 6;

[0039] Figure 8 is a cross-sectional view of DD in Figure 6;

[0040] Figure 9 is a schematic diagram of the air passage connection between the end cover, the vibrator and the gear disk in Figure 3;

[0041] Figure 10 is a cross-sectional view of one embodiment of the end cap;

[0042] Figure 11 is a perspective view of one embodiment of the end cap;

[0043] Figure 12 is a schematic diagram of one embodiment of the gear disk;

[0044] Figure 13 is a schematic diagram of one embodiment of the oscillator;

[0045] Figure 14 is a schematic diagram of the fit between the gear disk, the vibrator and the end cover in one embodiment;

[0046] Figure 15 is a schematic diagram of another embodiment of the gear disk;

[0047] Figure 16 is a schematic diagram of the engagement of the gear disk, vibrator and end cover in another embodiment;

[0048] Figure 17 is a schematic diagram of the ultrasonic spindle in the first cross section and shows a schematic diagram of an embodiment of the gap adjustment assembly;

[0049] Figure 18 is a schematic diagram of the ultrasonic spindle in the second section of Figure 17;

[0050] Figure 19 is a schematic diagram of the ultrasonic spindle in Figure 17 on the third cross section, where the first, second and third cross sections all pass through the axis of the spindle core and are at a certain angle to each other;

[0051] Figure 20 is a schematic diagram of another embodiment of the gap adjustment assembly;

[0052] Figure 21 is an enlarged view of point B in Figure 20;

[0053] Figure 22 is a schematic diagram of one embodiment of the adjusting nut in Figure 20;

[0054] Figure 23 is a cross-sectional view of the tool changing mechanism and the tool pulling mechanism applied to the ultrasonic spindle in one embodiment;

[0055] Figure 24 is a schematic diagram of another embodiment of the tool changing mechanism, wherein the tool changing mechanism is in the tool release state. Detailed Implementation

[0056] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0057] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0058] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0059] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0060] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Referring to Figures 1 and 2, this application provides an ultrasonic spindle, including a spindle body 100, a spindle core 200, an ultrasonic generator assembly 300, a mounting assembly 400, and a wireless sensing module 500. The spindle body 100 has a first mounting cavity 110, and the spindle core 200 is mounted within the first mounting cavity 110. The ultrasonic generator assembly 300 is located at the end of the spindle core 200. The ultrasonic generator assembly 300 includes a vibrator 310, which is used to connect to a tool holder 600. The vibrator 310 is connected to one end of the spindle core 200 and partially accommodated within the first mounting cavity 110. The ultrasonic generator assembly 300 can generate ultrasonic waves and transmit them to the tool holder 600, causing the tool holder 600 to vibrate at high frequency and perform high-precision machining on the workpiece.

[0062] In one embodiment, the ultrasonic generating assembly 300 includes an ultrasonic transducer and a vibrator 310. The ultrasonic transducer is fixedly connected to the shaft core 200, and the vibrator 310 is connected to the ultrasonic transducer and sleeved around the tool holder 600. During operation, the ultrasonic transducer transmits ultrasonic waves to the vibrator 310, causing the vibrator 310 to generate ultrasonic vibrations. The vibrations are then transmitted to the tool holder 600 through the vibrator 310, thereby achieving the function of ultrasonic machining.

[0063] The mounting assembly 400 is connected to one end of the spindle body 100 and is located on the outer periphery of the oscillator 310. The mounting assembly 400 and the outer wall of the oscillator 310 define a first cooling channel 301. The side wall of the spindle body 100 is also provided with an air inlet 120 that communicates with the first mounting cavity 110.

[0064] The air inlet 120 is used to introduce cooling gas. The cooling gas can enter the first mounting cavity 110 through the air inlet 120 and enter the first cooling channel 301. The gas flowing in the first cooling channel 301 cools the transducer 310, thereby achieving cooling of the transducer 310 by air cooling. The overall structure of the ultrasonic spindle is simple, low in cost, and has reliable cooling function. It can also avoid the phenomenon of unstable vibration energy transmission caused by excessive temperature rise of the transducer, which affects the power transmission efficiency, ensures the reliability of the spindle operation, and improves the working efficiency of the ultrasonic spindle.

[0065] The ultrasonic spindle also includes a wireless sensing module 500, which is mounted on the outer wall of the spindle core 200 and located radially between the spindle core 200 and the spindle body 100. The wireless sensing module 500 is connected to the ultrasonic generating assembly 300 and introduces ultrasonic power into the ultrasonic generating assembly 300 wirelessly. The wireless sensing module 500 includes a wireless power receiving module 510 and a wireless power supply module 520. The wireless power receiving module 510 is connected to the ultrasonic generating assembly 300 through a wire. A second cooling channel 501 is defined between the wireless sensing module 500 and the inner wall of the spindle body 100.

[0066] The second cooling channel 501 is connected to the air inlet 120. Cooling gas is introduced into the second cooling channel 302 through the air inlet 120. The gas flowing in the second cooling channel 502 cools down the wireless sensing module 500 to prevent the wireless sensing module from overheating and affecting the power transmission efficiency.

[0067] The ultrasonic spindle also includes an air cooling assembly 10, which is connected to the spindle body 100 and used to introduce cooling gas into the air inlet 120. The air cooling assembly 10 can be connected to a cooling air path. In this application, the air cooling assembly 10 is connected to the air source that performs air curtain sealing on the ultrasonic spindle. That is, the air cooling assembly 10 directly utilizes the existing air curtain sealing air source of the ultrasonic spindle, without the need to set up other cooling air paths. It introduces the airflow into the first cooling channel 301 and the second cooling channel 501 respectively to complete the cooling of the vibrator 310 and the wireless sensing module 500. This cooling method can not only remove the heat dissipated by the vibrator 310 and the wireless sensing module 500 during operation, but also meet the rotation requirements of the wireless power receiving module 510 in the vibrator 310 and the wireless sensing module 500, and seal the rotation gap between the vibrator 310 and the wireless power receiving module 510.

[0068] The air cooling assembly 10 includes an air connector 11, which is connected to the air inlet 120. The air connector 11 is sealed to the spindle body 100 to prevent gas leakage at the air inlet 120. The air connector 11 is connected to the air curtain sealing air source through a pipeline to introduce cooling gas into the spindle body 100.

[0069] Referring to Figure 3, the spindle body 100 also has a first axial air intake channel 130 and a second axial air intake channel 140. The air intake hole 120 extends radially along the spindle body 100. The first axial air intake channel 130 and the second axial air intake channel 140 extend axially along the spindle body 100 and are respectively connected to the two opposite sides of the air intake hole 120 along the axial direction of the spindle body 100. The first axial air intake channel 130 is connected to the first cooling channel 301, and the second axial air intake channel 140 is connected to the second cooling channel 501. The airflow entering the air intake hole 120 is split by the first axial air intake channel 130 and the second axial air intake channel 140 and then split into two airflows that enter the first cooling channel 301 and the second cooling channel 501 respectively.

[0070] In this application, the end of the shaft core 200 facing the vibrator 310 is defined as the front, and the end of the shaft core 200 facing away from the vibrator 310 is defined as the rear. The vibrator 310 is connected to the front end of the shaft core 200, and the wireless sensing module 500 is connected to the rear part of the shaft core 200. The air inlet 120 is provided at the front part of the spindle body 100. By providing two axial air inlet channels 130 and 140 with opposite extension directions in the spindle body 100, the airflow introduced from the air inlet 120 can be directed to the front and rear parts of the spindle body 100 respectively, thereby cooling the vibrator 310 and the wireless sensing module 500.

[0071] As shown in Figure 1, the ultrasonic spindle also includes a front bearing assembly 20 and a rear bearing assembly 30. Both the front bearing assembly 20 and the rear bearing assembly 30 are located inside the spindle body 100. The front bearing assembly 20 is located at the front end of the spindle body 100, and the rear bearing assembly 30 is located at the rear end of the spindle body 100. The front bearing assembly 20 and the rear bearing assembly 30 are located on both sides of the wireless sensing module 500, and are used to connect the spindle body 100 and the shaft core 200, so that the shaft core 200 can reliably rotate relative to the spindle body 100, and the overall structure of the spindle is compact, with good rigidity and stability.

[0072] The wireless sensing module 500 includes a wireless power receiving module 510 and a wireless power supply module 520 arranged along the axial direction of the spindle body 100. The wireless power receiving module 510 is located at the front end of the wireless power supply module 520, and there is a gap between the wireless power receiving module 510 and the wireless power supply module 520 to form a wireless power transmission. It should be noted that the wireless power receiving module 510 and the wireless power supply module 520 are arranged along the axial direction of the spindle body 100 to facilitate installation and adjustment of the gap between them, ensuring the reliability of the wireless sensing module 500. Understandably, depending on the size of the installation space within the spindle body 100 and the required power transmission power, the wireless power receiving module 510 and the wireless power supply module 520 can also be arranged radially along the spindle body 100 to meet different installation and processing requirements.

[0073] As shown in Figures 2 and 4, the wireless power receiving module 510 includes a power receiving housing 511 and a power receiving unit 512 disposed within the power receiving housing 511. The wireless power supply module 520 includes a power supply housing 521 and a power supply unit 522 disposed within the power supply housing 521. The outer periphery of the power receiving housing 511 and / or the power supply housing 521 is provided with a groove 530. The groove 530 and the inner wall of the spindle body 100 define a second cooling channel 501. The airflow entering the second cooling channel 501 flows along the groove 530, which can fully contact the power receiving housing 511 and / or the power supply housing 521 and exchange heat, thereby achieving rapid cooling of the wireless power supply module 520 and / or the wireless power receiving module 510.

[0074] In one embodiment, the groove 530 is annular, and multiple grooves 530 are arranged along the axial direction of the spindle body 100. The outer peripheral wall of the power receiving housing 511 and / or the power supply housing 521 is provided with a notch 540. Adjacent grooves 530 along the axial direction of the spindle body 100 are connected through the notch 540. Thus, cooling gas can sequentially pass through different grooves 530, resulting in a large contact area between the cooling gas and the power receiving housing 511 and / or the power supply housing 521. This facilitates sufficient heat exchange between the cooling gas and the wireless power receiving module 510 and / or the wireless power supply module 520, improving the cooling efficiency of the wireless power receiving module 510 or the wireless power supply module 520, thereby ensuring the overall operational reliability of the spindle structure. Furthermore, the multiple grooves 530 can be arranged in parallel, allowing for uniform heat dissipation from the power receiving housing 511 and / or the power supply housing 521, preventing localized overheating of the power receiving housing 511 and / or the power supply housing 521.

[0075] Furthermore, referring to Figure 2, the spindle body 100 is also provided with an exhaust channel 150. The exhaust channel 150 is used to discharge the gas in the second cooling channel 501 so that the cooling gas carries the heat absorbed during the heat exchange process and is discharged from the ultrasonic spindle. The air cooling assembly 10 continuously supplies air to the air inlet 120, and the cooling gas continuously enters the second channel, so that the cooling gas and the power supply housing 521 and / or the power supply housing 521 have a high heat exchange efficiency, thereby realizing rapid cooling of the wireless power supply module 520 and / or the wireless power receiving module 510.

[0076] The exhaust channel 150 extends axially along the spindle body 100. The front end of the exhaust channel 150 is connected to the groove 530, and the other end extends to the rear end of the spindle body 100 and is discharged from the rear end of the spindle body 100. The groove 530 located at one end of the wireless sensing module 500 along the axial direction of the spindle body 100 is connected to the air inlet 120, and the groove 530 at the other end is connected to the exhaust channel 150. The cooling gas entering through the air inlet 120 passes through multiple grooves 530 in sequence and enters the exhaust channel 150 and is discharged from the exhaust channel 150; or, one of the grooves 530 is connected to the air inlet 120. After the cooling gas enters the groove 530 through the air inlet 120, it can flow bidirectionally along the axial direction of the spindle body 100 and enter different grooves 530 through the notch 540.

[0077] In other embodiments, the groove 530 is configured as a spiral shape, with the spiral direction of the groove 530 approximately along the axial direction of the main shaft body 100. Cooling gas can flow continuously along the spiral direction of the groove 530 to cool the wireless power receiving module 510 or the wireless power supply module 520. The entire outer peripheral wall of the power receiving housing 511 and / or the power supply housing 521 along the axial direction of the main shaft body 100 can be cooled.

[0078] One end of the spiral groove 530 is connected to the air inlet 120, and the other end is connected to the exhaust channel 150. Cooling gas entering through the air inlet 120 flows spirally within the groove 530 and exchanges heat with the power receiving housing 511 and / or the power supply housing 521. Understandably, the groove 530 can also be configured in other shapes. For example, a portion of the groove 530 can be annular and encircle the outer peripheral wall of the power receiving housing 511 and / or the power supply housing 521, while the other portion of the groove 530 extends axially along the spindle body 100. The two portions of the groove 530 are interconnected. Cooling gas enters the groove 530 from the annular portion and then enters the other portion of the groove 530 axially along the spindle body 100, thus achieving cooling of the power receiving housing 511 and / or the power supply housing 521. After cooling the wireless sensing module 500, the gas is discharged from the spindle body 100 through the exhaust channel 150, ensuring the overall reliability of the spindle operation.

[0079] In another embodiment, referring to Figures 5-8, the wireless power receiving module 510 and the wireless power supply module 520 are radially spaced along the main shaft body 100 to reduce the overall axial dimension of the ultrasonic main shaft, facilitating the installation and replacement of the ultrasonic main shaft. The wireless power supply module 520 is located on the outer periphery of the wireless power receiving module 510, and there is a gap between them. The gap between the wireless power supply module 520 and the wireless power receiving module 510 and / or the outer periphery of the wireless power supply module 520 is configured to communicate with the air inlet 120. The cooling gas introduced from the air inlet 120 can flow into the gap between the wireless power supply module 520 and the wireless power receiving module 510, as well as to the outer periphery of the wireless power supply module 520, so that both the wireless power supply module 520 and the wireless power receiving module 510 can be cooled, thereby achieving cooling of the wireless sensing module 500.

[0080] A receiving housing 511 is disposed on the outer peripheral surface of the spindle core 200. A power supply housing 521 is connected to the inner wall of the spindle body 200. A gap exists between the receiving unit 512 and the power supply unit 522 in the radial direction of the spindle body 200. This gap communicates with the air inlet 120 through the second axial air inlet channel 140. A second cooling channel 501 is defined between the power supply housing 521 and the inner wall of the spindle body 200. The second cooling channel 501 communicates with the air inlet 120 through the second axial air inlet channel 140. Cooling gas introduced through the air inlet 120 enters the gap between the power supply unit 522 and the receiving unit 512 and the second cooling channel through the second axial air inlet channel 140, thereby cooling the wireless sensing module 500 and ensuring the reliability of energy transmission.

[0081] In one embodiment, a venting groove is provided on the outer peripheral surface of the power supply housing 521, and a second cooling channel 501 is defined between the venting groove and the inner wall of the spindle body 200. The venting groove can be configured as annular, spiral, or elongated shapes.

[0082] In one embodiment, the outer peripheral surface of the power supply housing 521 is further provided with an annular groove 5211, and the end face of the power supply housing 521 facing away from the mounting assembly 400 is provided with a radial groove 5212. The radial groove 5212 connects the annular groove 5211 and the inner cavity of the power supply housing, allowing the cooling gas between the receiving unit 512 and the power supply unit 522 to enter the radial groove 5212 and be stored in the annular groove 5211, further cooling the wireless sensing module and facilitating the discharge of cooling gas from the spindle body 100. It is understood that the power supply housing 521 is uniformly provided with multiple radial grooves 5212 in its circumference, and each radial groove 5212 connects the annular groove 5211 and the inner cavity of the power supply housing 521, ensuring uniform distribution of cooling gas and allowing it to enter the annular groove 5211, thus guaranteeing the overall operational reliability of the ultrasonic spindle structure.

[0083] In addition, the ventilation groove on the outer periphery of the power supply housing 521 and / or the gap between the power supply unit 522 and the power receiving unit 512 are connected to the second axial air intake channel 140 to discharge excess cooling gas from the spindle body 100.

[0084] An inner spacer 104 and an outer spacer 105 are arranged opposite each other inside the main spindle body 100. The inner spacer 104 and the outer spacer 105 are arranged radially apart along the main spindle body 100 and are used to limit the wireless power supply module 520 and the wireless power receiving module 510 respectively, so as to ensure the installation stability and working reliability of the overall structure of the ultrasonic spindle. The cavity between the inner spacer 104 and the outer spacer 105 is connected to the gap and exhaust channel 150 in the wireless sensing module 500.

[0085] Furthermore, the outer spacer 105 is provided with an outer ring groove that communicates with the exhaust channel 150, and an outer ring radial groove 106 that communicates with the outer ring groove. The outer ring radial groove 106 also communicates with the cavity between the inner spacer 104 and the outer spacer 105, which facilitates the flow and discharge of cooling gas from the spindle body 100.

[0086] In one embodiment, referring to Figures 2 and 3, the mounting assembly 400 includes an end cap 410 and a gear disk 420 distributed axially along the spindle body 100. The first cooling channel 301 includes a first channel segment 302 and a second channel segment 303 that are connected. The first channel segment 302 is defined between the end cap 410 and the vibrator 310, and the second channel segment 303 is defined between the gear disk 420 and the vibrator 310. The gear disk 420 is located in front of the end cap 410. The end cap 410 is connected between the front end of the spindle body 100 and the gear disk 420. The first axial air intake channel 130 in the spindle body 100 is connected to the first channel segment 302 and the second channel segment 303 in sequence. The cooling gas distributed from the air inlet 120 to the first axial air inlet channel 130 first enters the first channel section 302 to cool the part of the oscillator 310 that mates with the end cover 410, and then enters the second channel section 303 to cool the part of the oscillator 310 that mates with the gear disk 420.

[0087] Furthermore, referring to Figures 5 to 7, the end cover 410 has a third axial air intake channel 411, a first radial air intake channel 412, and an air storage groove 413. The air storage groove 413 extends circumferentially along the end cover 410. For example, the air storage groove 413 is set as an annular shape or as an arc shape, and multiple air storage grooves are provided along the circumferential direction of the end cover 410. The third axial intake channel 411 extends in the same direction as the first axial intake channel 130, and the front end of the first axial intake channel 130 is connected to the rear end of the third axial intake channel 411. The front end of the third axial intake channel 411 is connected to the first radial intake channel 412. The first radial intake channel 412 is connected to the intake hole 120 through the third axial intake channel 411. The first channel section 302 is connected to the first radial intake channel 412 through the gas storage tank 413. That is, the cooling gas in the first axial intake channel 130 passes through the third axial intake channel 411, the first radial intake channel 412, and the gas storage tank 413 in sequence, and enters the first channel section 302. That is, the cooling gas enters the axial fitting gap between the end cover 410 and the oscillator 310 to cool the oscillator 310.

[0088] Specifically, the gas storage groove 413 is disposed on the inner wall of the end cap 410. The inner wall of the end cap 410 has two protruding annular ribs 414 spaced apart along the axial direction, which define an annular gas storage groove 413. The gas storage groove 413 serves to store cooling gas, providing sufficient cooling gas for the first channel section 302 and the second channel section 303. Furthermore, the cooling gas stored in the gas storage groove 413 can contact and cool other components within the ultrasonic spindle. One end of the first radial air inlet channel 412 extends through the groove wall of the gas storage groove 413, thus communicating with the gas storage groove 413.

[0089] The end cap 410 also includes a gas distribution groove 415 arranged along the axial direction of the main shaft body 100. The gas distribution groove 415 is connected to the first channel section 302, and the gas storage groove 413 is connected to the first channel section 302 through the gas distribution groove 415. That is, the cooling gas flowing from the first radial air intake channel 412 into the gas storage groove 413 enters the first channel section 302 through the gas distribution groove 415 and cools the mating part between the oscillator 310 and the end cap 410. The arrangement of the gas distribution groove 415 realizes the connection between the gas storage groove 413 and the first channel section 302 in the axial direction of the main shaft body 100. Multiple gas distribution grooves 415 can be provided and distributed along the circumference of the end cap 410. The cooling gas in the gas storage groove 413 can enter the first channel section 302 from the gas distribution grooves 415 at different positions, so that the distribution of cooling gas in different areas of the first channel section 302 is more balanced, and uniform cooling of different circumferential areas of the oscillator 310 is achieved.

[0090] Furthermore, the gas distribution groove 415 can be disposed on the annular rib 414 forming the gas storage groove 413, and the gas distribution groove 415 is located on the front side of the annular rib 414. The gas distribution groove 415 passes through the annular rib 414 axially, which simplifies the structure of the end cover 410. In addition, one end of the first radial air intake channel 412 extends to the outer wall of the end cover 410 and is blocked by a plug. On the one hand, this facilitates the processing of the first radial air intake channel 412, and the processing tool can directly drill a hole from the outer wall of the end cover 410 to achieve communication with the third axial air intake channel 411. On the other hand, it isolates the first radial air intake channel 412 from the outside and prevents gas leakage from the end cover 410. The cooling gas entering the end cover 410 from the third axial air intake channel 411 can enter the first radial air intake channel 412 to a greater extent, which can improve the reliability of the cooling of the oscillator 310.

[0091] Understandably, as shown in Figure 3, the spindle body 100 is also provided with a second radial air intake channel 160 extending radially. The air intake hole 120 and the second radial air intake channel 160 are respectively connected to the second axial air intake channel 140. The other end of the second radial air intake channel 160 is used to connect to the second cooling channel 501. The other end of the second radial air intake channel 160 extends through to the outer wall of the spindle body 100. The end of the second radial air intake channel 160 is sealed with a plug, which can also improve the processing convenience of the second radial air intake channel 160 and achieve the sealing of the second radial air intake channel 160.

[0092] Referring to Figures 5, 8, and 9, the outer peripheral surface of the gear disk 420 is provided with teeth 421. These teeth 421 connect to external devices to perform tool changing operations on the tool holder 600. The gear disk 420 has a first end face 422 on the side facing the end cover 410. The vibrator 310 includes a first connecting portion 311 extending axially and a second connecting portion 312 connected to the periphery of the first connecting portion 311. That is, the second connecting portion 312 protrudes radially relative to the first connecting portion 311. A second end face 313 is provided on the side of part 312 facing the gear disk 420. A radial ventilation channel 304 is defined between the first end face 422 and the second end face 313. A first connecting part 311 passes through the interior of the gear disk 420 and defines an axial ventilation channel 305 between it and the inner wall of the gear disk 420. The radial ventilation channel 304 and the axial ventilation channel 305 are connected to form a second channel segment 303. Both the radial ventilation channel 304 and the axial ventilation channel 305 are connected to the outside.

[0093] That is, the second channel section 303 includes a radial ventilation channel 304 for the cooling gas to flow radially and an axial ventilation channel 305 for the cooling gas to flow axially. When the cooling gas flows in the radial ventilation channel 304, it cools the second connecting part 312 of the oscillator 310 and can be discharged from the radial ventilation channel 304. When the cooling gas flows in the axial ventilation channel 305, it cools the first connecting part 311 of the oscillator 310 and can be discharged from the axial ventilation channel 305. This increases the contact area between the oscillator 310 and the cooling gas, achieving effective cooling of the oscillator 310. Furthermore, the cooling gas, after absorbing heat, can be quickly discharged from the second channel section 303 radially and axially, improving the reliability of the cooling of the oscillator 310.

[0094] Understandably, the cooling gas in the first channel section 302 enters the axial ventilation channel 305 through the radial ventilation channel 304. That is, the cooling gas first passes through the outer peripheral surface of the second connecting part 312 of the vibrator 310 to cool the outer peripheral surface of the second connecting part 312, and then enters the radial air intake channel to cool the second end face 313 of the second connecting part 312. Finally, it enters the axial ventilation channel 305 to cool the outer peripheral surface of the first connecting part 311.

[0095] In one embodiment, the gear disk 420 includes a first axial protrusion 423 and a second axial protrusion 424. Both the first axial protrusion 423 and the second axial protrusion 424 protrude toward the end cover 410 along the axial direction of the main shaft body 100 relative to the first end face 422. The first axial protrusion 423 is arranged around the outer periphery of the second axial protrusion 424. The first axial protrusion 423 and the end cover 410 are in clearance fit. The second axial protrusion 424 and the second connecting portion 312 are in clearance fit. The end cover 410 is sleeved on the outer periphery of the second connecting portion 312. The gear disk 420 is sleeved on the first connecting portion 311 and located in front of the second connecting portion 312. The first axial protrusion 423 and the second axial protrusion 424 are respectively connected to the second connecting portion 312 and the end cover 410, making the connection between the gear disk 420, the vibrator 310 and the end cover 410 more stable. The cooling gas in the radial ventilation channel 304 is discharged to the outside through the clearance fit.

[0096] Further referring to Figures 8 to 10, the gear disk 420 has a plurality of radially mating portions 425 and a plurality of axially mating portions 426 arranged along the axial direction of the main shaft body 100 on the side facing the end cover 410. The radially mating portions 425 and the axially mating portions 426 are both located between the first axial protrusion 423 and the second axial protrusion 424. The radially mating portions 425 are connected to the outer periphery of the second axial protrusion 424. An axial ventilation groove 427 is defined between adjacent radially mating portions 425. The axial ventilation groove 427 is used to allow cooling gas to flow along the axial direction of the main shaft body 100. The axially mating portions 426 are connected to the outer peripheral wall of the radially mating portions 425 along the radial direction of the main shaft body 100. A first end face 422 is formed on the surface of the axially mating portions 426 facing the end cover 410. A radial ventilation groove 428 is defined between adjacent axially mating portions 426. The radial ventilation groove 428 is used to allow cooling gas to flow along the radial direction of the main shaft body 100.

[0097] The second connecting portion 312 includes a plurality of protrusions 3121 that protrude toward the gear disk 420 and are spaced apart circumferentially along the main shaft body 100. A through groove 3122 that extends radially between adjacent protrusions 3121 is defined. The through groove 3122 and the radial ventilation groove 428 are arranged opposite to each other along the axial direction of the main shaft body 100. The protrusions 3121 and the axial mating portion 426 are arranged opposite to each other along the axial direction of the main shaft body 100. After the first connecting part 311 passes through the gear disk 420, the inner wall of the protrusion 3121 in the radial direction abuts against the outer peripheral wall of the radial mating part 425 and is clearance-fitted with the outer peripheral surface of the second axial protrusion 424. The cooling gas in the axial ventilation groove 427 can flow between the second axial protrusion 424 and the protrusion 3121. In addition, the end face of the protrusion 3121 facing the gear disk 420 forms a second end face 313. The first end face 422 abuts against the second end face 313. The cooling gas in the radial ventilation groove 428 can flow between the groove wall of the radial ventilation groove 428 and the second end face 313.

[0098] Specifically, cooling gas flows from between the second connecting part 312 and the end cap 410 into the radial venting groove 428. One path of the cooling gas in the radial venting groove 428 leads into the axial venting groove 427, and then through the radial gap between the second axial protrusion 424 and the second connecting part 312, into the axial venting channel 305 between the first connecting part 311 and the gear disk 420. Another path of cooling gas enters the mating gap between the first axial protrusion 423 and the end cap 410, and is discharged to the outside of the ultrasonic spindle. This achieves the flow of cooling gas from the first channel section 302 to the second channel section 303, and allows the cooling gas to enter the radial venting channel 304 and the axial venting channel 305 respectively. Furthermore, the radial venting grooves 428 and axial venting grooves 427 are positioned correspondingly and are multiple in number circumferentially, allowing the cooling gas to flow more evenly on the outer circumferential surfaces of the first connecting part 311 and the second connecting part 312, thus achieving uniform cooling of the vibrator 310.

[0099] This application also provides a gear disk 420 structure according to another embodiment. Referring to Figures 11 and 12 (where the arrows in Figures 10 and 11 are used to indicate the airflow direction), the gear disk 420 includes a protruding ring 429 protruding toward the end cover 410 relative to the first end face 422. The protruding ring 429 is provided with a ventilation hole 4291 for radial ventilation. The second connecting part 312 includes a plurality of protrusions 3121 protruding toward the gear disk 420 and arranged axially along the main shaft body 100. A through groove 3122 is defined between adjacent protrusions 3121. The through groove 3122 communicates with the axial ventilation channel 305 through the ventilation hole 4291. The first connecting part 311 passes through the gear disk 420, and the first end face 422 abuts against the second end face 313. The groove wall of the through groove 3122 and the first end face 422 form a channel for cooling gas to flow radially. The through groove 3122 and the ventilation hole 4291 correspond to each other in the circumferential direction of the shaft core 200. The two ends of the ventilation hole 4291 are respectively connected to the through groove 3122 and the axial ventilation channel 305. Thus, a part of the cooling gas flows out from between the second connecting part 312 and the end cover 410 and is discharged through the gap between the gear disk 420 and the end cover 410. The other part flows into the through groove 3122 and flows radially in the through groove 3122 to cool the second connecting part 312. Then, it enters the axial ventilation channel 305 through the ventilation hole 4291 to cool the outer peripheral surface of the first connecting part 311.

[0100] Understandably, multiple through slots 3122 and ventilation holes 4291 are provided and evenly distributed along the axial direction of the oscillator 310 to achieve uniform cooling of the surface of the second connecting part 312 and the outer peripheral surface of the first connecting part 311 of the oscillator 310. The through slot 3122 can also be provided on the first end face 422 of the gear disk 420, which can also form a radial airflow channel between the first end face 422 and the second end face 313. Understandably, by providing the through slot 3122 on the oscillator 310, the cooling gas flowing from the outer peripheral surface of the second connecting part 312 of the oscillator 310 and the end cover 410 can directly enter the through slot 3122 at the oscillator 310, reducing airflow loss caused by the installation and fit between components and improving the cooling efficiency of the oscillator 310.

[0101] Referring to Figures 10 and 12, a protruding boss 4210 is provided on the side of the gear disk 420 facing away from the end cover 410. The boss 4210 is arranged around the outer periphery of the vibrator 310, and the end of the boss 4210 limits the front end face of the vibrator 310, making the installation of the vibrator 310 more stable. Referring to Figures 2 and 9, the vibrator 310 has a second receiving cavity 314 for mounting the tool holder 600. A part of the inner wall of the boss 4210 and the outer wall of the vibrator 310 define an axial ventilation channel 305, and another part is clearance-fitted with the tool holder 600. Thus, the cooling gas discharged through the axial ventilation channel 305 can enter the gap between the boss 4210 and the tool holder 600 to cool the tool holder 600, and be discharged from the ultrasonic spindle from the gap between the outer peripheral surface of the boss 4210 and the tool holder 600, thereby achieving cooling of the outer peripheral surface of the vibrator 310 and the tool holder 600 and improving the reliability of the ultrasonic spindle operation.

[0102] In this application, the ultrasonic spindle also includes a gap adjustment component 700 for adjusting the gap between the wireless power receiving module 510 and the wireless power supply module 520. Adjusting the gap between the wireless power receiving module 510 and the wireless power supply module 520 to an optimal state improves the efficiency of power transmission and ensures maximum energy transfer; it also reduces spindle heating during operation and enhances spindle stability. Specifically, by operating the gap adjustment component 700, the wireless power supply module 520 can be driven to move closer to or further away from the wireless power receiving module 510 within the spindle body 100, thereby adjusting the gap between the wireless power supply module 520 and the wireless power receiving module 510.

[0103] The power supply housing 521 is fixedly connected to the main shaft body 100. A power supply unit 522 is installed inside the power supply housing 521, with multiple turns of power supply coil wound on the power supply unit 522. The power supply coil is used to connect to an external ultrasonic power source. Referring to Figures 13 to 15, a preload spring 710 is installed on the power supply housing 521. The end of the preload spring 710 away from the power supply housing 521 abuts against the side wall of the rear bearing assembly 30. The preload spring 710 can preload the rear bearing assembly 30, eliminating internal clearances in the bearing and thus providing a certain rigidity to the main shaft. The wireless power receiving module 510 includes a power receiving housing 511, which is sleeved on and fixedly connected to the shaft core 200. A power receiving unit 512 is installed inside the power receiving housing 511, corresponding to the power supply unit 522. Multiple turns of power receiving coil are wound on the power receiving unit 512, which is used to connect to the vibrator 310 on the shaft core 200.

[0104] To facilitate wiring, a radial wire-passing hole 170 and a first axial hole 180 are provided on the spindle body 100, and a second axial hole 210 is provided on the spindle core 200. The radial wire-passing hole 170 is located on the outer wall of the spindle body 100. The first axial hole 180 is connected to both the radial wire-passing hole 170 and the power supply housing 521. The second axial hole 210 is connected to both the power receiving housing 511 and the ultrasonic generator assembly 300. After the ultrasonic spindle is assembled, the wires on the ultrasonic power supply pass through the radial wire-passing hole 170 and the first axial hole 180, and then extend into the power supply housing 521 to electrically connect with the power supply unit 522. The wires on the ultrasonic generator assembly 300 pass through the second axial hole 210, and then pass through the power receiving housing 511 to electrically connect with the power receiving unit 512. By providing the radial wire-passing hole 170, the first axial hole 180, and the second axial hole 210, the cables inside the ultrasonic spindle can be kept neater, avoiding the problem of circuit failure caused by cable tangling.

[0105] The spindle body 100 is provided with an observation hole 190. The observation hole 190 is located at the position where the wireless power supply module 520 and the wireless power receiving module 510 cooperate. The observation hole 190 is used to check the gap between the wireless power supply module 520 and the wireless power receiving module 510. It also facilitates the insertion of calipers to measure the gap, ensuring the reliability of gap adjustment and further ensuring the efficiency of power transmission.

[0106] Referring to Figures 13 to 15, the gap adjustment assembly 700 includes an adjustment screw 720 and an adjustment set screw 730. The adjustment screw 720 passes through the spindle body 100 and is threadedly connected to the power supply housing 521. A nut is provided at the end of the adjustment screw 720 away from the power supply housing 521, and the nut abuts against the spindle body 100. By tightening the adjustment screw 720, the power supply housing 521 can be driven to move closer to the adjustment screw 720, that is, the power supply housing 521 can be driven to move away from the power receiving housing 511, thereby increasing the gap between the wireless power supply module 520 and the wireless power receiving module 510. Adjusting screw 730 is threadedly connected to spindle body 100. One end of adjusting screw 730 extends out of spindle body 100 and abuts against power supply housing 521. By tightening adjusting screw 730, the end of adjusting screw 730 extending out of spindle body 100 abuts against power supply housing 521. Continuing to rotate adjusting screw 730 can push power supply housing 521 to move closer to power receiving housing 511, thereby reducing the gap between wireless power supply module 520 and wireless power receiving module 510.

[0107] A mounting groove 101 is provided on the end face of the spindle body 100. An adjusting screw 720 and an adjusting set screw 730 are respectively disposed in the mounting groove 101. A mounting cover 102 is provided on the spindle body 100 at a corresponding position to the mounting groove 101. The mounting cover 102 is detachably connected to the spindle body 100. In order to limit the position of the wireless power supply module 520, a plurality of fastening screws 103 are radially provided on the spindle body 100. The fastening screws 103 are threadedly connected to the spindle body 100 and can abut against the outer wall of the power supply housing 521.

[0108] Referring to Figures 16 and 17, this application also provides a gap adjustment assembly 700 according to another embodiment. The gap adjustment assembly 700 includes an adjusting nut 740, which is sleeved on the periphery of the power supply housing 521. The outer side wall of the power supply housing 521 is provided with external threads, and the inner side wall of the adjusting nut 740 is provided with internal threads. The adjusting nut 740 is threadedly connected to the power supply housing 521. The adjusting nut 740 is limitedly connected to the spindle body 100. By rotating the adjusting nut 740, the power supply housing 521 can be driven to move axially within the spindle body 100, thereby moving the power supply housing 521 away from or closer to the receiving housing 511, achieving the purpose of adjusting the gap between the wireless power supply module 520 and the wireless receiving module 510.

[0109] Specifically, a limiting boss 750 is provided on the inner side wall of the spindle body 100, and a fixing ring 760 is installed on the spindle body 100. The fixing ring 760 is sleeved on the periphery of the power supply housing 521 and is in clearance fit with the power supply housing 521. The two end faces of the adjusting nut 740 are respectively connected to the limiting boss 750 and the fixing ring 760. The axial movement of the adjusting nut 740 is limited by the fixing ring 760 and the limiting boss 750, so that the adjusting nut 740 can only rotate and cannot move axially. This ensures that when the adjusting nut 740 rotates, it can drive the power supply housing 521 to move axially within the spindle body 100, so as to achieve the purpose of adjusting the gap between the wireless power supply module 520 and the wireless power receiving module 510.

[0110] Referring to Figure 18, in order to facilitate the rotation of the adjusting nut 740, multiple operating grooves 741 are arranged in a circular array on the outer side wall of the adjusting nut 740, and clearance holes are provided on the main shaft body 100 at positions corresponding to the operating grooves 741.

[0111] To prevent accidental operation, a sealing cover 770 is provided on the clearance hole. The sealing cover 770 is detachably connected to the spindle body 100 by screws.

[0112] If it is necessary to increase the gap between the wireless power supply module 520 and the wireless power receiving module 510, the adjusting nut 740 is turned counterclockwise using a tool. The adjusting nut 740 drives the power supply housing 521 to move away from the power receiving housing 511. The gap between the wireless power supply module 520 and the wireless power receiving module 510 is measured by inserting calipers through the observation hole 190. Once the gap between the wireless power supply module 520 and the wireless power receiving module 510 reaches the expected level, the adjusting nut 740 is stopped from being turned, and the sealing cover 770 is then installed on the clearance hole.

[0113] In this embodiment, the gap adjustment component 700 uses an adjusting nut 740, and a limiting boss 750 and a fixing ring 760 are provided in the spindle body 100 to restrict the adjusting nut 740 to rotate but not move axially. Compared with using two adjusting components, namely adjusting screw 720 and adjusting set screw 730, this embodiment only uses the adjusting nut 740 to connect and cooperate with the power supply housing 521, which can realize the adjustment of the gap between the wireless power supply module 520 and the wireless power receiving module 510. This saves installation space, is easier to operate and adjust, and also ensures adjustment efficiency and accuracy. That is, the operation of the adjusting nut 740 is more stable and the uniformity of gap adjustment is improved.

[0114] Referring to Figure 1, a portion of the tool holder 600 is disposed within the vibrator 310, and a pull rod 40 is disposed within the shaft core 200. The pull rod 40 is movably engaged with the shaft core 200. One end of the pull rod 40 is provided with a tool-pulling mechanism 800, and the other end is provided with a tool-changing mechanism 900. The tool-changing mechanism 900 is detachably engaged with the tool holder 600. The tool-pulling mechanism 800 can pull or push the pull rod 40 to move axially within the shaft core 200, thereby connecting and fixing or loosening the tool holder 600 with the pull rod 40 to facilitate the replacement of the tool holder 600.

[0115] Referring to Figure 19, a locking groove 610 is provided on the side wall of the tool holder 600 near the tool changing mechanism 900. The locking groove 610 is detachably engaged with the tool changing mechanism 900. By providing the locking groove 610 on the tool holder 600, the tool holder 600 can be engaged with the tool changing mechanism 900, and then connected to the pull rod 40. An avoidance groove 315 is provided on the inner side wall of the ultrasonic transducer 310. The tool changing mechanism 900 can engage with the avoidance groove 315. By providing the avoidance groove 315, it can be used to accommodate the tool changing mechanism 900, so as to make room for avoidance when the tool changing mechanism 900 is working, so that the tool changing mechanism 900 can release the tool holder 600 for tool holder replacement.

[0116] The tool changing mechanism 900 includes a pull claw 910, which is fixedly connected to the end of the pull rod 40 away from the tool changing mechanism 800. The pull claw 910 has four claw heads 911 arranged in a circular array. During the movement of the pull rod 40 driven by the tool changing mechanism 800, the pull rod 40 can drive the pull claw 910 to move together, thereby allowing the four claw heads 911 to close or open, thus locking or releasing the tool holder 600. In other embodiments, the number of claw heads 911 can be any other number.

[0117] The drawbar mechanism 800 includes a drawbar ring 810, a drawbar connector 820, and an elastic element 830. The drawbar ring 810 is sleeved on the periphery of the shaft core 200 and is slidably connected to the shaft core 200. The drawbar connector 820 is disposed inside the shaft core 200 and can slide axially within the shaft core 200. A drawbar rod 840 is radially disposed inside the drawbar ring 810. The drawbar rod 840 passes through the shaft core 200 and the drawbar connector 820 in sequence. The drawbar rod 840 is fixedly connected to the drawbar connector 820, and the drawbar connector 820 is fixedly connected to the end of the pull rod 40 away from the handle 600. The drawbar rod 840 can push or pull the pull rod 40 to move axially within the shaft core 200. The spindle core 200 has elongated holes 220 at corresponding positions to the drawbar 840, and the drawbar 840 can slide within the elongated holes 220. The elongated holes 220 provide clearance for the axial sliding of the drawbar 840, and can also limit the movement direction and stroke of the drawbar 840, improving the efficiency of tool changing. One end of the elastic element 830 is connected to the drawbar connector 820, and the other end is connected to the spindle core 200. The elastic element 830 is used to push the drawbar connector 820 to move away from the tool holder 600, thereby driving the drawbar 40 and the jaw 911 to move together, realizing rapid tool loading.

[0118] In this embodiment, the elastic element 830 is helical elastic, and the helical spring is sleeved around the pull rod 40; in other embodiments, the elastic element 830 may also be other elastic devices or structures.

[0119] To limit the movement of the elastic element 830, in this embodiment, a pull rod sleeve 850 is fixedly installed inside the shaft core 200. The pull rod sleeve 850 is respectively sleeved around the pull rod 40 and the elastic element 830. A limiting step is provided inside the pull rod sleeve 850, and the end of the elastic element 830 away from the broach connector 820 abuts against the limiting step. During the replacement of the tool holder 600, the elastic element 830 extends and retracts within the pull rod sleeve 850. The pull rod sleeve 850 can limit the movement of the elastic element 830, improving the stability of the structure and reducing the assembly difficulty.

[0120] As shown in Figure 19, in other embodiments, the pull rod sleeve 850 can be replaced by a shaft core retaining ring 860. The shaft core retaining ring 860 is sleeved on the periphery of the pull rod 40 and is movably engaged with the pull rod 40. The end of the elastic member 830 away from the puller connector 820 abuts against the shaft core retaining ring 860.

[0121] In practical applications, the tool holder 600 has both large and small sizes. For the large-sized tool holder 600, the corresponding pulling force and spring force are larger. Therefore, a shaft core retaining ring 860 is set inside the shaft core 200 and abuts against the elastic element 830. For the small-sized tool holder 600, the corresponding pulling force and spring force are smaller. Therefore, a pull rod sleeve 850 is set inside the shaft core 200, and an elastic element 830 is set inside the pull rod sleeve 850. That is, through the shaft core retaining ring 860 or the pull rod sleeve 850, the elastic element 830 used in tool holders of different sizes can be reliably installed and limited, ensuring the reliability of the overall structure.

[0122] Referring to Figure 20, this application also provides a tool changing mechanism 900 according to another embodiment. The tool changing mechanism 900 includes six balls 920. Six radial slots 41 are provided on the side wall of the pull rod 40 near the tool changing mechanism 900. The six radial slots 41 are arranged in a circumferential array, and each radial slot 41 corresponds to one of the balls 920. The balls 920 are respectively placed in the corresponding radial slots 41 and are movably connected to the radial slots 41. When the balls 920 are not restricted within the radial slots 41, they can roll freely within the radial slots 41 without falling out of the radial slots 41. The rolling of the balls 920 within the radial slots 41 can achieve the locking or unlocking of the tool holder 600. In one embodiment, limit rings can be installed at both ends of the radial slots 41 to prevent the balls 920 from falling out of the radial slots 41.

[0123] In other embodiments, the number of balls 920 can also be any other number, as long as the radial slots 41 and balls 920 are set in a one-to-one correspondence.

[0124] In practical applications, for small-sized ordinary tool holders 600, the tool changing mechanism 900 is equipped with a puller 910 and a jaw 911, which can reliably clamp and position the tool holder 600, making installation and assembly convenient and reliable. For large-sized ordinary tool holders 600, the tool changing mechanism 900 uses ball bearings 920, which cooperate with the clearance groove 315 and the clamping groove 610 to reliably clamp the tool holder 600. By simply selecting a ball bearing 920 of appropriate size and adjusting the size of the clearance groove 315 and the clamping groove 610 that cooperate with the ball bearing 920, reliable clamping of the tool holder 600 can be achieved. The tool changing mechanism 900 is easier to process, saves installation space, and reduces costs.

[0125] Compared with the prior art, this application has the following beneficial effects:

[0126] This application directly utilizes the existing air curtain sealing air source of the ultrasonic spindle, eliminating the need for additional cooling air paths. The airflow is introduced into the first cooling channel 301 and the second cooling channel 501 respectively to cool the vibrator 310 and the wireless sensing module 500. The overall structure is simple, low-cost, and has reliable cooling function. It can also avoid unstable vibration energy transmission caused by excessive temperature rise of the vibrator and the impact of excessive temperature of the wireless transmission module on power transmission efficiency, thus ensuring the reliability of the spindle operation and improving the working efficiency of the ultrasonic spindle.

[0127] By mounting the ultrasonic generator assembly 300 on the side of the front bearing assembly 20 away from the rear bearing assembly 30, it is possible to install a larger size and higher power ultrasonic generator assembly 300, ensuring that sufficient mechanical energy can be generated to produce effective vibration in ordinary BT tool holders, thereby making it suitable for ordinary BT tool holders and improving its versatility.

[0128] Through the cooperation of the broaching mechanism 800, the tool changing mechanism 900, and the tool holder 600, the tool holder 600 within the ultrasonic generating assembly 300 can be replaced, making it suitable for various processing scenarios and improving practicality and versatility. Simultaneously, the tool changing mechanism 900 can reliably clamp and engage ordinary tool holders of different sizes, protecting the overall structural reliability. The tool changing mechanism 900 can connect and cooperate with the mounting assembly 400 to complete the tool changing operation. Simultaneously, the mounting assembly 400 can cooperate with the vibrator 310 to form a first cooling channel 301 for cooling gas flow, achieving cooling of the outer peripheral surface of the vibrator 310 and allowing airflow to exit between the mounting assembly 400 and the vibrator 310, and between the mounting assembly 400 and the end face of the spindle body 100.

[0129] The gap adjustment component 700 can drive the wireless power supply module 520 to move axially, thereby adjusting the mating gap between the wireless power supply module 520 and the wireless power receiving module 510. This allows the mating gap to be adjusted to the optimal state, thereby improving the efficiency of power transmission and ensuring maximum energy transmission. It can also reduce the heat generated during spindle operation and improve the stability of spindle operation. Furthermore, a second cooling channel 501 is provided between the wireless sensing module 500 and the spindle body 100. When the cooling gas flows through the second cooling channel 501, it cools the wireless sensing module 500. The cooling gas is eventually discharged outside the spindle, which can further reduce the heat generated by the spindle.

[0130] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. Ultrasonic spindle, including: The spindle body has a first mounting cavity inside, and the side wall of the spindle body is also provided with an air inlet that communicates with the first mounting cavity. The air inlet is used to introduce cooling gas. The shaft is housed within the first mounting cavity; An ultrasonic generating assembly includes a transducer connected to one end of the shaft core and partially housed within the first mounting cavity; The mounting assembly is connected to one end of the spindle body and located on the outer periphery of the oscillator to define a first cooling channel between itself and the outer wall of the oscillator, the first cooling channel communicating with the air inlet.

2. The ultrasonic spindle according to claim 1, wherein, The ultrasonic spindle also includes a wireless sensing module, which is installed on the outer wall of the spindle core and located radially between the spindle core and the spindle body. A second cooling channel is defined between the wireless sensing module and the spindle body, and the second cooling channel is connected to the air inlet.

3. The ultrasonic spindle according to claim 1, wherein, The air inlet is connected to an air source that provides an air curtain seal for the ultrasonic spindle.

4. The ultrasonic spindle according to claim 2, wherein, The air intake hole extends radially along the spindle body. The spindle body also has a first axial air intake channel communicating with the first cooling channel and a second axial air intake channel communicating with the second cooling channel. The first axial air intake channel and the second axial air intake channel extend axially along the spindle body and are respectively connected to the two opposite sides of the air intake hole.

5. The ultrasonic spindle according to claim 4, wherein, The wireless sensing module includes a wireless power receiving module and a wireless power supply module arranged radially at intervals along the main shaft body. The wireless power supply module is located on the outer periphery of the wireless power receiving module, and the gap between the wireless power supply module and the wireless power receiving module and / or the outer periphery of the wireless power supply module communicates with the air inlet.

6. The ultrasonic spindle according to claim 4, wherein, The wireless sensing module includes a wireless power receiving module and a wireless power supply module arranged along the axial direction of the spindle body. The wireless power receiving module includes a power receiving housing and a power receiving unit disposed within the power receiving housing. The wireless power supply module includes a power supply housing and a power supply unit disposed within the power supply housing. The outer periphery of the power receiving housing and / or the power supply housing is provided with a groove, and the groove defines the second cooling channel between the groove and the inner wall of the spindle body.

7. The ultrasonic spindle according to claim 6, wherein, The main spindle body is provided with an exhaust channel along the axial direction, the groove is set as an annular shape, and multiple grooves are provided along the axial direction of the main spindle body. The outer peripheral wall of the power receiving housing and / or the power supply housing is provided with a notch, and adjacent grooves along the axial direction of the main spindle body are connected through the notch. Alternatively, the groove may be spiral-shaped, and the groove may connect the air intake and the exhaust passage respectively.

8. The ultrasonic spindle according to any one of claims 1 to 7, wherein, The mounting assembly includes an end cap and a gear disk distributed axially along the spindle body. The first cooling channel includes a first channel segment and a second channel segment that are connected. The first channel segment is defined between the end cap and the vibrator, and the second channel segment is defined between the gear disk and the vibrator. The end cap is connected between the end of the main shaft body and the gear disk. The end cap has a third axial air intake channel, a first radial air intake channel and an air storage groove. The air storage groove extends circumferentially along the end cap. The first radial air intake channel communicates with the air intake hole through the third axial air intake channel. The first channel section communicates with the first radial air intake channel through the air storage groove.

9. The ultrasonic spindle according to claim 8, wherein, The end cap also includes an air distribution groove arranged along the axial direction of the shaft core. The first radial air intake channel is connected to the air distribution groove through the air storage groove, and the air distribution groove is connected to the first channel section.

10. The ultrasonic spindle according to claim 8, wherein, The gear disk has a first end face, and the vibrator includes a first connecting part and a second connecting part connected to the periphery of the first connecting part. The second connecting part has a second end face, and a radial ventilation channel is defined between the first end face and the second end face. The first connecting part passes through the interior of the gear disk and defines an axial ventilation channel extending along the axial direction. The radial ventilation channel communicates with the axial ventilation channel and forms the second channel segment.

11. The ultrasonic spindle according to claim 10, wherein, The gear disk includes a first axial protrusion and a second axial protrusion that protrude toward the end cover relative to the first end face. The first axial protrusion is circumferentially disposed on the outer periphery of the second axial protrusion and is in clearance fit with the end cover. The second axial protrusion is in clearance fit with the second connecting portion.

12. The ultrasonic spindle according to claim 11, wherein, The outer periphery of the second axial protrusion is also provided with a plurality of radial mating parts. A plurality of axial mating parts are provided between the first axial protrusion and the second axial protrusion. An axial venting groove and a radial venting groove are defined between adjacent radial mating parts and between adjacent axial mating parts, respectively. The second connecting part includes a plurality of protrusions that are disposed opposite to the axial mating parts. A through groove that is disposed opposite to the radial venting groove is defined between adjacent protrusions.

13. The ultrasonic spindle according to claim 10, wherein, The gear disk includes a protruding ring that protrudes toward the end cover relative to the first end face. The protruding ring is provided with a ventilation hole. The second connecting part includes a plurality of protrusions that protrude toward the gear disk and are arranged circumferentially along the main shaft body. A through groove is defined between adjacent protrusions. The through groove communicates with the axial ventilation channel through the ventilation hole.

14. The ultrasonic spindle according to claim 10, wherein, The gear disk has a protruding boss on the side facing away from the end cover. The boss is arranged around the outer periphery of the vibrator. The vibrator has a second receiving cavity for mounting the tool holder. A portion of the inner wall of the boss and the outer wall of the vibrator define the axial ventilation channel, and another portion is used for clearance fit with the tool holder.

15. The ultrasonic spindle according to any one of claims 1-7, wherein, The ultrasonic spindle also includes a tool changing mechanism and a tool pulling mechanism. The ultrasonic generating component is provided with a tool handle, and the spindle core is provided with a pull rod. One end of the pull rod is connected to the tool pulling mechanism, and the other end is connected to the tool changing mechanism. The tool changing mechanism and the tool handle are detachably snapped together. And / or, The ultrasonic spindle also includes a gap adjustment component connected to the spindle body. The gap adjustment component can drive the wireless power supply module of the wireless sensing module to move closer to or further away from the wireless power receiving module of the wireless sensing module, thereby adjusting the gap between the wireless power supply module and the wireless power receiving module.

Images