Wireless power supply ultrasonic spindle

Abstract

The utility model provides a wireless power supply ultrasonic spindle, which relates to the technical field of ultrasonic spindles, and comprises a support sleeve, and the support sleeve plays a role in limiting internal devices and is detachably connected with a numerical control machine tool; the rotating shaft core is rotationally connected with the inner wall of the supporting sleeve, and the rear end is connected with the rotating mechanism; the broach mechanism is arranged in the middle of the rotating shaft core, and one end of the broach mechanism is detachably connected with the cutter handle mechanism; the wireless power supply module is annularly arranged on the inner wall of the supporting sleeve; the wireless power receiving module corresponds to the wireless power supply module and is used for receiving the wireless energy and outputting the wireless energy to a target load through a wire; the problems that according to an existing wireless power supply scheme, the stability and efficiency of high-frequency electric energy transmission are difficult to consider at the same time, particularly, frequency detuning is likely to occur when loads suddenly change, so that the output amplitude of a piezoelectric transducer is unstable, and the output amplitude of the piezoelectric transducer is unstable are solved. And the quality of the machined surface is directly affected.

Description

Technical Field

[0001] This utility model mainly relates to the field of ultrasonic spindle technology, specifically to a wirelessly powered ultrasonic spindle. Background Technology

[0002] Currently, ultrasonic spindles are widely used in the machine tool processing field for high-precision machining. They convert high-frequency electrical energy into mechanical vibration through piezoelectric ceramic transducers, achieving micron-level cutting of materials. However, traditional ultrasonic spindles typically rely on wired power supply, transmitting electrical energy to rotating parts via carbon brushes or slip rings. This power supply method has significant drawbacks: carbon brushes and slip rings are prone to wear and electrical sparks under high-speed rotation, leading to increased contact resistance, increased energy loss, and even electromagnetic interference, affecting machining accuracy and equipment lifespan.

[0003] Wireless power supply technologies (such as magnetic coupling resonance or radio frequency power transfer) have been applied in some rotating equipment, but their adaptability in the field of ultrasonic spindles still faces challenges. Ultrasonic spindles require a stable high-frequency power supply and are extremely sensitive to transmission efficiency and power fluctuations. Existing wireless power supply solutions struggle to balance the stability and efficiency of high-frequency power transmission, especially prone to frequency detuning under sudden load changes, leading to unstable piezoelectric transducer output amplitude and directly affecting the quality of machined surfaces.

[0004] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model:

[0006] This invention provides a wirelessly powered ultrasonic spindle to solve the technical problems existing in the background art.

[0007] 2. Technical Solution:

[0008] To achieve the above objectives, the technical solution provided by this utility model is: a wirelessly powered ultrasonic spindle, comprising...

[0009] A support sleeve, which limits the internal device, has a first connecting hole arranged in a ring on its outside for detachable connection with a CNC machine tool.

[0010] The rotating shaft is rotatably connected to the inner wall of the support sleeve, and its rear end is connected to the rotating mechanism via a coupling.

[0011] A drawbar mechanism is located in the middle of the rotating shaft, and one end of it is detachably connected to the tool holder mechanism.

[0012] A wireless power supply module is arranged in a ring on the inner wall of the support sleeve for receiving external power input and transmitting wireless energy.

[0013] A wireless power receiving module is arranged in a ring around the outside of the rotating shaft core, corresponding to the wireless power supply module, and is used to receive wireless energy and output it to the target load through a wire.

[0014] The tool holder mechanism is equipped with a power supply connector, which is connected to the tool pulling mechanism or matched with the rotating shaft.

[0015] When this device is in operation, the ultrasonic spindle is connected to the existing CNC machine tool via bolts. After the connection is locked, the wireless power supply module is connected to the power supply of the CNC machine tool. Then, the tool holder mechanism to be worked is inserted into the end of the broaching mechanism. When the CNC machine tool's rotating mechanism is working, it will drive the rotating shaft and the broaching mechanism to rotate within the support sleeve. During the rotation, the wireless power supply module will transmit power to the wireless power receiving module wirelessly. The wireless power receiving module will guide the power to the tool mechanism or the end of the rotating shaft through wires. After the tool holder mechanism is engaged with the broaching mechanism or the rotating shaft is matched and connected, the ultrasonic components in the tool holder mechanism are powered. This device uses wireless power supply to stably transmit power to the tool holder mechanism, ensuring that the ultrasonic spindle can efficiently complete the processing operation.

[0016] Furthermore, the support sleeve has an inlet hole on its exterior, through which the wireless power supply module is connected by a wire.

[0017] Furthermore, when the power supply connector is connected to the rotating shaft, the power supply connector is arranged in a ring around the outer ring of the tool holder mechanism, and the outer ring of the tool holder mechanism is also arranged in a ring. The rotating shaft is provided with a first positioning groove and a first power supply groove. The first positioning groove is matched and connected to the first positioning protrusion, and the first power supply groove is matched and connected to the power supply connector.

[0018] Furthermore, when the power supply connector is connected to the puller mechanism, the power supply connector is located at the end of the tool holder mechanism, the end of the puller mechanism is provided with a second power supply groove, and the outer ring of the tool holder mechanism is also provided with a second positioning protrusion that engages with the rotating shaft core.

[0019] Furthermore, the rotating shaft core is provided with a conductive channel, and the conductive channel is provided with a power transmission line, one end of which is connected to the wireless power receiving module.

[0020] Furthermore, the wireless power supply module and the wireless power receiving module are powered by electromagnetic induction coupling.

[0021] Furthermore, a bearing assembly is provided between the support sleeve and the rotating shaft to ensure the smooth rotation of the rotating shaft.

[0022] Furthermore, the bottom of the wireless power receiving module is provided with a ring-shaped magnetic core made of manganese-zinc ferrite.

[0023] Furthermore, the wireless power supply module and the wireless power receiving module are surrounded by an electromagnetic shielding layer; the electromagnetic shielding layer is made of conductive material and is ring-shaped around the outside of the wireless power supply module and the wireless power receiving module to suppress electromagnetic radiation interference and improve wireless power transmission efficiency.

[0024] 3. Beneficial effects:

[0025] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0026] This utility model has a reasonable design and adopts an electromagnetic induction coupling design between the wireless power supply module and the power receiving module, which effectively solves the problems of mechanical wear and electrical spark interference that exist in traditional slip ring power supply, and significantly improves the spindle service life and power supply stability.

[0027] The innovative dual-mode power supply structure design, through different connection methods between the tool holder mechanism and the rotating shaft / drawing mechanism, satisfies both the multi-point power supply requirements of large-size spindles and the single-point power supply requirements of small-size spindles. The matching design of the positioning protrusion and the power supply groove realizes the integration of mechanical positioning and electrical connection, significantly improving the convenience and reliability of tool changing operations.

[0028] The overall structure maintains a stable air gap distance through bearing assemblies, and the discontinuous annular electromagnetic shielding layer design suppresses electromagnetic interference while ensuring energy transmission efficiency. The modular design makes the spindle easy to maintain and compatible with existing CNC machine tool interfaces, demonstrating promising prospects for industrial application.

[0029] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0032] Figure 3 This utility model Figure 2 A magnified structural diagram at point A;

[0033] Figure 4This is a schematic diagram of the structure of the second embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the tool holder mechanism according to the first embodiment of the present utility model;

[0035] Figure 6 This is a schematic diagram of another embodiment of the tool holder mechanism of this utility model;

[0036] Figure 7 This is a schematic diagram of the tool holder mechanism according to the second embodiment of the present invention.

[0037] Figure label:

[0038] 1. Support sleeve; 11. Cable inlet hole; 2. First connecting hole; 3. Rotating shaft; 4. Pulling mechanism; 5. Tool holder mechanism; 51. First positioning protrusion; 52. First power supply groove; 53. Second power supply groove; 54. Second positioning protrusion; 6. Wireless power supply module; 7. Wireless power receiving module; 8. Power transmission connector; 9. Bearing assembly. Detailed Implementation

[0039] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] It should be noted that the structures not described in this utility model do not involve the design points and improvement directions of this utility model, and can all adopt existing technologies known to those skilled in the art.

[0044] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0045] See attached document Figure 1-7 A wirelessly powered ultrasonic spindle, comprising

[0046] Support sleeve 1, which limits the internal device, and has a first connecting hole 2 arranged in a ring on its outside for detachable connection with CNC machine tool.

[0047] Rotary shaft 3 is rotatably connected to the inner wall of the support sleeve 1, and its rear end is connected to the rotating mechanism via a coupling.

[0048] The drawbar mechanism 4 is located in the middle of the rotating shaft core 3, and one end of it is detachably connected to the tool holder mechanism 5.

[0049] The wireless power supply module 6 is arranged in a ring on the inner wall of the support sleeve 1, and is used to receive external power input and perform wireless power transmission.

[0050] The wireless power receiving module 7 is arranged in a ring on the outside of the rotating shaft core 3, corresponding to the wireless power supply module 6, and is used to receive wireless energy and output it to the target load through a wire.

[0051] The tool holder mechanism 5 is provided with a power supply connector 8, which is connected to the tool pulling mechanism 4 or matched with the rotating shaft core 3.

[0052] In this embodiment, please refer to the following: Figure 1 and Figure 3The ultrasonic spindle is bolted to the existing CNC machine tool. After the connection is locked, the wireless power supply module 6 is connected to the power supply of the CNC machine tool. Then, the tool holder mechanism 5 to be worked is inserted into the end of the broaching mechanism 4. When the rotating mechanism of the CNC machine tool is working, it will drive the rotating shaft core 3 and the broaching mechanism 4 to rotate within the support sleeve 1. During the rotation, the wireless power supply module 6 will transmit power to the wireless power receiving module 7 wirelessly. The wireless power receiving module 7 will guide the power to the end of the tool holder mechanism or the rotating shaft core 3 through the wire. After the tool holder mechanism 5 is engaged with the broaching mechanism 4 or the rotating shaft core 3 is matched and connected, the ultrasonic components in the tool holder mechanism 5 are powered. This device uses wireless power supply to stably transmit power to the tool holder mechanism 5, ensuring that the ultrasonic spindle can efficiently complete the processing operation.

[0053] The support sleeve 1 has an inlet hole 11 on its outside. The wireless power supply module 6 is connected to the inlet hole 11 by a wire. In this embodiment, the inlet hole 11 is opened on the outside of the support sleeve 1 to facilitate the power supply of the internal wireless power supply module 6. The wire in the inlet hole 11 is connected to an external power source.

[0054] When the power supply connector 8 is connected to the rotating shaft core 3, the power supply connector 8 is arranged in a ring around the outer ring of the tool holder mechanism 5. A first positioning protrusion 51 is also arranged in a ring around the outer ring of the tool holder mechanism 5. The rotating shaft core 3 is provided with a first positioning groove and a first power supply groove 52. The first positioning groove is matched and connected to the first positioning protrusion 51, and the first power supply groove 52 is matched and connected to the power supply connector 8. In this embodiment, it is suitable for larger ultrasonic spindles. Please refer to this embodiment for details. Figure 2 , Figure 5 and Figure 6 The method of multi-point power supply is adopted, with at least two points of power supply. That is, two power supply connectors 8 are symmetrically arranged on the outer ring of the tool holder mechanism 5. When installing the tool holder mechanism 5, the end of the tool holder mechanism 5 is inserted into the head of the puller mechanism 4, so that the two power supply connectors 8 of the tool holder mechanism 5 are connected to the two first power supply grooves 52 of the rotating shaft core 3. The first positioning groove is engaged with the first positioning protrusion 51, so that the tool holder mechanism 5 is limited while being powered.

[0055] When the power supply connector 8 is connected to the drawbar mechanism 4, the power supply connector 8 is located at the end of the tool holder mechanism 5. The end of the drawbar mechanism 4 is provided with a second power supply groove 53. The outer ring of the tool holder mechanism 5 is also provided with a second positioning protrusion 54 that engages with the rotating shaft core 3. Please refer to this for details. Figure 4 and Figure 7In this embodiment, a smaller ultrasonic spindle is used, and a single-point power supply is adopted. When the tool holder mechanism 5 is installed on the puller mechanism 4, the end of the tool holder mechanism 5 will be engaged with the end of the puller mechanism 4. At this time, the second power supply groove 53 of the puller mechanism 4 is connected to the power supply connector 8 to supply power to the tool holder mechanism 5. The second positioning protrusion 54 performs a limiting operation on the tool holder mechanism 5. It should be noted that the engagement between the tool holder mechanism 5 and the puller mechanism 4 adopts existing technology, which will not be described in detail here.

[0056] The rotating shaft core 3 has a conductive channel, and a power transmission line is installed within the conductive channel. One end of the power transmission line is connected to the wireless power receiving module 7. Please refer to [reference needed]. Figure 2 and Figure 4 The power transmission lines in the conductive channel are used to supply power to the connected tool holder mechanism 5.

[0057] The wireless power supply module 6 and the wireless power receiving module 7 are powered by electromagnetic induction coupling. In this embodiment, the spacing between the wireless modules within the spindle is on the order of centimeters, which is within the optimal working range of electromagnetic induction. The electromagnetic induction is sufficient and efficient. Furthermore, the symmetrical coil design reduces the impact of positional offset when the spindle rotates. The wireless power supply module 6 can use a high-frequency inverter circuit and a transmitting coil, while the wireless power receiving module 7 can use a receiving coil and a rectifier and voltage regulator circuit. The high-frequency inverter circuit converts the externally input DC power into high-frequency AC power and generates an alternating magnetic field through the transmitting coil. The receiving coil senses the alternating magnetic field and generates an induced current, which is then processed by the rectifier and voltage regulator circuit to output a stable DC power to the target load.

[0058] A bearing assembly 9 is provided between the support sleeve 1 and the rotating shaft core 3 to ensure the smooth rotation of the rotating shaft core 3. The bearing assembly 9 can ensure the rotation of the rotating shaft core 3 and keep the distance between the wireless modules constant, thus ensuring the normal transmission of power.

[0059] The bottom of the wireless power receiving module 7 is provided with a ring-shaped magnetic core made of manganese zinc ferrite. The high permeability of the ring-shaped magnetic core made of manganese zinc ferrite can effectively constrain the magnetic field generated by electromagnetic induction, reduce magnetic leakage, and improve the coupling coefficient between the transmitting coil of the wireless power supply module 6 and the receiving coil of the wireless power receiving module 7.

[0060] The wireless power supply module 6 and the wireless power receiving module 7 are surrounded by an electromagnetic shielding layer. The electromagnetic shielding layer is made of conductive material and is wrapped in a ring around the outside of the wireless power supply module 6 and the wireless power receiving module 7. It is used to suppress electromagnetic radiation interference and improve wireless energy transmission efficiency. The electromagnetic shielding layer adopts a discontinuous ring structure, which allows axial magnetic fields to effectively penetrate while suppressing radial electromagnetic radiation.

[0061] The specific working process of this device is as follows: the support sleeve 1 is installed onto the CNC machine tool through the first connecting hole 2, and an external power supply is connected;

[0062] Insert the tool holder mechanism 5 so that it connects with the tool puller mechanism 4;

[0063] When the machine tool is started, the rotating mechanism drives the rotating shaft 3 to rotate, and the wireless power supply module 6 continuously supplies power to the wireless power receiving module 7.

[0064] Electrical energy is transmitted to the tool holder mechanism 5 through the power transmission line, driving the ultrasonic component to work.

[0065] The drawbar mechanism 4 is located in the middle of the rotating shaft core 3 and is used to clamp the tool holder mechanism 5. The tool holder mechanism 5 is equipped with a power supply connector 8, which can be used in two ways depending on the spindle size:

[0066] For large-size spindles, refer to Figure 2 , Figure 5 , Figure 6 The power supply connector 8 is arranged in a ring around the outer ring of the tool holder mechanism 5. The rotating shaft core 3 has a first power supply groove 52 and a first positioning groove at the corresponding position. During installation, the first positioning protrusion 51 of the tool holder mechanism 5 engages with the first positioning groove, and at the same time, the power supply connector 8 contacts the first power supply groove 52 to achieve electrical connection.

[0067] For small-sized spindles, refer to Figure 4 and Figure 7 The power supply connector 8 is located at the end of the tool holder mechanism 5, and the end of the drawbar mechanism 4 is provided with a second power supply groove 53. During installation, the power supply connector 8 of the tool holder mechanism 5 contacts the second power supply groove 53, and at the same time, the second positioning protrusion 54 engages with the rotating shaft core 3 to achieve limiting.

[0068] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A wirelessly powered ultrasonic spindle, characterized in that: include Support sleeve (1), the support sleeve (1) plays a limiting role for the internal device, and the first connecting hole (2) is arranged in a ring on its outside for detachable connection with CNC machine tool; Rotate the shaft core (3), which is rotatably connected to the inner wall of the support sleeve (1), and its rear end is connected to the rotating mechanism through a coupling; The drawbar mechanism (4) is located in the middle of the rotating shaft core (3), and one end of it is detachably connected to the tool holder mechanism (5); The wireless power supply module (6) is arranged in a ring on the inner wall of the support sleeve (1) for receiving external power input and transmitting wireless energy. The wireless power receiving module (7) is arranged in a ring on the outside of the rotating shaft core (3), corresponding to the wireless power supply module (6), and is used to receive wireless energy and output it to the target load through a wire; The tool holder mechanism (5) is provided with a power supply connector (8), which is connected to the tool pulling mechanism (4) or matched with the rotating shaft core (3).

2. The wirelessly powered ultrasonic spindle according to claim 1, characterized in that: The support sleeve (1) has an inlet hole (11) on the outside, and the wireless power supply module (6) is connected to the inlet hole (11) by a wire.

3. The wirelessly powered ultrasonic spindle according to claim 1, characterized in that: When the power supply connector (8) is connected to the rotating shaft (3), the power supply connector (8) is arranged in a ring around the outer ring of the tool holder mechanism (5), and the outer ring of the tool holder mechanism (5) is also arranged in a ring. The rotating shaft (3) is provided with a first positioning groove and a first power supply groove (52). The first positioning groove is matched and connected to the first positioning protrusion (51), and the first power supply groove (52) is matched and connected to the power supply connector (8).

4. The wirelessly powered ultrasonic spindle according to claim 1, characterized in that: When the power supply connector (8) is connected to the puller mechanism (4), the power supply connector (8) is located at the end of the handle mechanism (5), the end of the puller mechanism (4) is provided with a second power supply groove (53), and the outer ring of the handle mechanism (5) is also provided with a second positioning protrusion (54) that engages with the rotating shaft core (3).

5. The wirelessly powered ultrasonic spindle according to claim 1, characterized in that: The rotating shaft (3) has a conductive channel, and the conductive channel has a power transmission line. One end of the power transmission line is connected to the wireless power receiving module (7).

6. The wirelessly powered ultrasonic spindle according to claim 1, characterized in that: The wireless power supply module (6) and the wireless power receiving module (7) are powered by electromagnetic induction coupling.

7. The wirelessly powered ultrasonic spindle according to claim 1, characterized in that: A bearing assembly (9) is provided between the support sleeve (1) and the rotating shaft (3) to ensure the smooth rotation of the rotating shaft (3).

8. The wirelessly powered ultrasonic spindle according to claim 1, characterized in that: The bottom of the wireless power receiving module (7) is provided with a ring-shaped magnetic core made of manganese zinc ferrite.

9. A wirelessly powered ultrasonic spindle according to claim 1, characterized in that: The wireless power supply module (6) and the wireless power receiving module (7) are provided with an electromagnetic shielding layer. The electromagnetic shielding layer is made of conductive material and is wrapped in a ring around the outside of the wireless power supply module (6) and the wireless power receiving module (7) to suppress electromagnetic radiation interference and improve wireless energy transmission efficiency.

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