Ultrasonic gas float motorized spindle structure

Abstract

The utility model relates to the field of precision machining technique discloses a kind of ultrasonic air float electric main shaft structure, including body, shaft core, energy transmission component, driving assembly and transducer component, the shaft core is located in the inner cavity of the body;The driving assembly is located between the body and the shaft core, and the shaft core is rotated relative to the body;The outer periphery of the rear end of the shaft core is provided with transducer component, the energy transmission component is located in the rear end of the shaft core and located in one side of the transducer component, and the energy transmission component and the transducer component are electrically connected between.The utility model can improve the ultrasonic energy of transducer component, to improve the ultrasonic amplitude of main shaft structure to meet different processing needs, while also can improve the structural rigidity of shaft core, ensure the reliability and work efficiency of main shaft structure overall work.

Description

Technical Field

[0001] This utility model relates to the field of precision machining technology, and more specifically, to an ultrasonic air-bearing electric spindle structure. Background Technology

[0002] Ultrasonic machining, due to the ultrasonic energy at the tool tip, is widely used for machining non-metallic, hard, and brittle materials, as well as for creating micro-holes and deep holes. Current ultrasonic electric spindle structures typically embed the transducer assembly within the spindle core cavity, often resulting in insufficient converted ultrasonic energy and an ultrasonic amplitude far below the requirements of ultrasonic machining. Furthermore, existing ultrasonic electric spindle structures drive the spindle core's rotation through the stator and rotor of the drive assembly. The energy transmission component is generally located on one side of the drive assembly, resulting in a significant distance between them. This necessitates machining long wire holes in the spindle core to pass through the connecting wires between the energy transmission and drive assemblies, which affects the structural rigidity of the spindle core. Summary of the Invention

[0003] The purpose of this invention is to address the technical problems existing in the prior art by providing an ultrasonic air-bearing electric spindle structure that can improve the ultrasonic amplitude and structural rigidity of the spindle and ensure its working efficiency.

[0004] To solve the problems mentioned above, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides an ultrasonic air-bearing electric spindle structure, including a body, a core, an energy transmission assembly, a drive assembly, and a transducer assembly. The core is disposed in the inner cavity of the body; the drive assembly is disposed between the body and the core, and drives the core to rotate relative to the body.

[0006] A transducer assembly is disposed on the outer periphery of the rear end of the shaft core. The energy transmission assembly is disposed at the rear end of the shaft core and located on one side of the transducer assembly. The energy transmission assembly and the transducer assembly are electrically connected.

[0007] Furthermore, it also includes a rear housing, which is located at and connected to the rear end of the main body;

[0008] The energy transmission assembly includes a power receiving module and a power supply module that are spaced apart. The power receiving module is located at the end of the rear end of the shaft and is connected to the transducer assembly. The outer wall of the power supply module is connected to the inner wall of the rear housing.

[0009] Furthermore, the power receiving module and the power supply module are arranged along the axial direction of the shaft core;

[0010] The spindle structure also includes an adjusting component, which is located on the outer periphery of the power supply module and is movablely engaged with the power supply module.

[0011] Furthermore, it also includes a pressure cap, which is located at the mating point between the rear housing and the adjusting member and abuts against the adjusting member.

[0012] Furthermore, the power supply module has a connecting protrusion on its outer periphery, and the adjusting member is located on the outer periphery of the connecting protrusion.

[0013] Furthermore, the outer periphery of the adjusting member is provided with a limiting protrusion, which cooperates with the rear housing and abuts against the pressure cover for limiting.

[0014] Furthermore, the power receiving module is provided with a dynamic balancing hole, and the rear housing is provided with an operating hole corresponding to the position of the dynamic balancing hole, with a dust plug installed inside the operating hole.

[0015] Furthermore, the power receiving module and the power supply module are arranged radially along the shaft core, and the power supply module abuts against and limits the inner sidewall of the rear housing end.

[0016] Furthermore, it also includes a limiting ring, which is disposed on the outer periphery of the shaft core and located between the energy transmission component and the transducer component to limit the position of the transducer component.

[0017] Furthermore, it also includes an air bearing assembly, which is disposed on the outer periphery of the shaft core and is used to form an air film on the outer periphery of the shaft core.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] In this invention, the transducer assembly is directly mounted on the outer periphery of the rear end of the spindle core. The transducer assembly drives the spindle core, which in turn drives the cutting tool to perform ultrasonic vibration. This increases the ultrasonic energy of the transducer assembly, thereby increasing the ultrasonic amplitude of the spindle structure to meet different machining requirements and ensure the machining efficiency of the spindle structure. Simultaneously, the energy transmission assembly is also located at the rear end of the spindle core, shortening the distance between the energy transmission assembly and the transducer assembly. This avoids machining long holes on the spindle core, improves the structural rigidity of the spindle core, and ensures the overall reliability of the spindle structure. Attached Figure Description

[0020] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a structural diagram of an example of the ultrasonic air-bearing electric spindle structure in this utility model.

[0022] Figure 2 This is another structural diagram of the ultrasonic air-bearing electric spindle structure example one of this utility model.

[0023] Figure 3 This is a partial schematic diagram of an example of the ultrasonic air-bearing electric spindle structure of this utility model.

[0024] Figure 4 This is a structural diagram of Example 2 of the ultrasonic air-bearing electric spindle structure in this utility model.

[0025] Among them, 1-body, 2-shaft core, 3-energy transmission component, 4-drive component, 5-transducer component, 7-air bearing component, 31-power receiving module, 32-power supply module, 41-motor stator, 42-motor rotor, 8-rear housing, 9-adjusting component, 10-pressure cover, 11-limiting ring, 71-air bearing, 72-air bearing bushing, 101-axial air bearing channel, 81-cooling inlet, 82-cooling outlet, 83-liquid storage tank. Detailed Implementation

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as “length,” “width,” “upper,” “lower,” “left,” “right,” “front,” “rear,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” indicate orientations or positions based on the orientations or positions shown in the accompanying drawings and are merely for ease of description and should not be construed as limiting the invention.

[0027] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion; the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a particular order. In the specification, claims, and accompanying drawings of this utility model, when an element is referred to as "fixed to," "mounted to," "set on," or "connected to" another element, it can be directly or indirectly located on that other element. For example, when an element is referred to as "connected to" another element, it can be directly or indirectly connected to that other element.

[0028] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] See Figure 1 and Figure 2 As shown, this utility model provides an ultrasonic air-bearing electric spindle structure, including a body 1, a spindle core 2, an energy transmission component 3, a drive component 4, and a transducer component 5. The spindle core 2 is disposed in the inner cavity of the body 1, and the drive component 4 is disposed between the inner circumference of the body 1 and the outer circumference of the spindle core 2. The drive component 4 can drive the spindle core 2 to rotate relative to the body 1.

[0030] A transducer assembly 5 is provided on the outer periphery of the rear end of the shaft core 2, and an energy transmission assembly 3 is provided at the end of the rear end of the shaft core 2. The energy transmission assembly 3 is located on one side of the transducer assembly 5, and the energy transmission assembly 3 and the transducer assembly 5 are electrically connected.

[0031] In this invention, the body 1 and the spindle core 2 each have a front end and a rear end, respectively, with the cutting tool typically located at the front end of the spindle core 2. The energy transmission assembly 3 connects to an external ultrasonic power supply to transmit ultrasonic energy, and under the action of the transducer assembly 5, drives the spindle core 2 to cause the cutting tool at its front end to vibrate ultrasonically. The transducer assembly 5 is located on the outer periphery of the rear end of the spindle core 2. By utilizing the space between the rear end of the spindle core 2 and the body 1, the size of the transducer assembly 5 is increased to enhance its ultrasonic energy, enabling the spindle structure to achieve the ideal ultrasonic amplitude, meeting different processing requirements, and ensuring the spindle's processing efficiency. Simultaneously, placing the energy transmission assembly 3 at the rear end of the spindle core 2 shortens the distance between the energy transmission assembly 3 and the transducer assembly 5, avoiding the need for long wire holes on the spindle core 2, improving the structural rigidity of the spindle core 2, and thus ensuring the reliability of the spindle's operation.

[0032] Furthermore, the spindle structure also includes a rear housing 8, which is located at and connected to the rear end of the main body 1, facilitating connection, assembly, and disassembly.

[0033] The energy transmission component 3 includes a power receiving module 31 and a power supply module 32. The power receiving module 31 is located at the end of the rear end of the shaft core 2 and is connected to the transducer component 5. The outer wall of the power supply module 32 is connected to the inner wall of the rear housing 8. The positions of the power receiving module 31 and the power supply module 32 correspond to each other and are fitted with a gap to realize wireless energy transmission.

[0034] Specifically, an external ultrasonic power supply connects to the power supply module 32 to provide ultrasonic energy. The power supply housing of the power supply module 32 can be fixedly connected to the rear housing 8 by means of screws or other methods. The receiving module 31 is connected to the shaft core 2 and can rotate with the shaft core 2. The receiving module 31 is connected to the transducer assembly 5 through wires to ensure the reliability of ultrasonic energy transmission. Understandably, in other embodiments, the rear housing 8 and the body 1 can adopt an integral structure, with the outer wall of the power supply module 32 connected to the inner wall of the body 1 and clearance-fitted with the receiving module 31, which can also achieve ultrasonic energy transmission.

[0035] Specifically, the drive assembly 4 includes a motor stator 41 and a motor rotor 42 arranged radially along the shaft core 2. The outer wall of the motor stator 41 is connected to the inner wall of the body 1, and the inner wall of the motor rotor 42 is connected to the outer wall of the shaft core 2. After the motor stator 41 is energized, the drive motor rotor 42 drives the shaft core 2 to rotate. At the same time, under the action of the energy transmission assembly 3 and the transducer assembly 5, the shaft core 2 can undergo ultrasonic vibration, enabling the shaft core 2 to drive the cutting tool at the front end to perform ultrasonic vibration machining.

[0036] In Embodiment 1, the power receiving module 31 and the power supply module 32 are arranged along the axial direction of the core 2 to achieve axial energy transmission.

[0037] In this embodiment, the spindle structure also includes an adjusting member 9. The adjusting member 9 is disposed on the power supply module 32 and is movably engaged with the power supply module 32. The adjusting member 9 can drive the power supply module 32 to move horizontally, facilitating the adjustment of the gap between the power supply module 32 and the power receiving module 31, and ensuring the transmission efficiency of both the power receiving module 31 and the power supply module 32. The power supply module 32 has a connecting boss 321 on its outer periphery. The adjusting member 9 is disposed on the outer periphery of the connecting boss 321, facilitating installation and ensuring reliable connection.

[0038] The main shaft structure also includes a pressure cover 10, which is set on the end face of the rear housing 8. The pressure cover 10 is located at the mating point between the rear housing 8 and the adjusting member 9 and abuts against the adjusting member 9, which can play the role of limiting and sealing protection.

[0039] Specifically, the adjusting component 9 has a limiting protrusion 91 on its outer periphery. The limiting protrusion 91 is located between the rear housing 8 and the pressure cover 10, that is, the limiting protrusion 91 is embedded in the rear housing 8 and pressed by the pressure cover 10, which serves the functions of installation and limiting. The adjusting component 9 can be an adjusting nut. The adjusting component 9 is threaded with the outer periphery of the power supply module 32, which is convenient for installation and adjustment.

[0040] In this embodiment, Figure 3As shown, the power receiving module 31 is provided with a dynamic balancing hole 311, and the rear housing 8 is provided with an operating hole 811 corresponding to the position of the dynamic balancing hole 311. This allows for the addition of screws or other parts of different weights into the dynamic balancing hole 311 to adjust the mass distribution and correct the dynamic balance, thereby reducing the vibration of the power receiving module 31 and improving the reliability of the energy transmission component 3. A dust plug 812 is installed inside the operating hole 81 for protection.

[0041] In Example 2, see Figure 4 As shown, the power receiving module 31 and the power supply module 32 are arranged radially along the shaft core 2 to achieve radial energy transmission, which can reduce the axial dimension of the rear end of the main shaft structure. The inner wall of the power receiving module 31 is connected to the outer periphery of the shaft core 2, and the power supply module 32 is located on the outer periphery of the power receiving module 31. The outer wall of the power supply module 32 is connected to the inner wall of the rear housing 8 and abuts against and limits the inner sidewall of the end of the rear housing 8.

[0042] Furthermore, the main shaft structure also includes a limiting ring 11, which is located on the outer periphery of the shaft core 2. The limiting ring 11 is located between the energy transmission component 3 and the transducer component 5 and is used to limit the transducer component 5 to ensure the reliability of the structure installation.

[0043] Furthermore, the spindle structure also includes an air bearing assembly 7, which is located on the outer periphery of the spindle core 2 and is used to form an air film on the outer periphery of the spindle core 2 to limit the radial position of the spindle core 2.

[0044] Specifically, the air bearing assembly 7 is located between the drive assembly 4 and the transducer assembly 5. The air bearing assembly 7 includes an air bearing 71 and an air bushing 72. The outer wall of the air bearing 71 is sealed to the inner wall of the body 1. The air bushing 72 is provided between the air bearing 71 and the shaft core 2. The inner wall of the air bushing 72 is fixedly connected to the outer wall of the shaft core 2. A first gap is formed between the air bushing 72 and the air bearing 71. That is, the air bearing 71 and the air bushing 72 are sequentially fitted radially onto the outer periphery of the shaft core 2. Understandably, the position of the air bearing assembly 7 can be adjusted according to the length of the shaft core 2. That is, the air bearing assembly 7 can also be located on the side of the drive assembly 4 away from the transducer assembly 5. Similarly, an air film can be formed on the outer periphery of the shaft core 2 to achieve radial limiting of the shaft core 2.

[0045] Specifically, the main body 1 is provided with an axial air-float channel 101, and the air-float bearing 71 is provided with multiple sets of radial holes 711. Each set of radial holes 711 has multiple holes distributed circumferentially, and all radial holes 711 are connected to the axial air-float channel 101 and the first gap. During operation, external compressed gas flows into the radial holes 711 through the axial air-float channel 101 and is then blown into the first gap. Since the radial holes 711 are circumferentially distributed, the compressed gas blown into the first gap will form a lubricating gas film with a certain load-bearing capacity and rigidity in the first gap, which supports the shaft core 2, prevents the shaft core 2 from shifting during rotation, and can also reduce friction to increase the rotational speed of the shaft core 2, thereby reducing the grinding force and improving the machining accuracy of the spindle structure. The compressed gas in the first gap also enters the inner cavity of the main body 1, which can also cool the drive assembly 4 and the transducer assembly 5.

[0046] Specifically, the main body 1 is also provided with cooling channels (not shown in the figure), and the rear housing 8 is provided with a cooling inlet 81, a cooling outlet 82 and a liquid storage tank 83. The cooling medium enters through the cooling inlet 81 and enters the liquid storage tank 83. The cooling medium in the liquid storage tank 83 is divided into two branches and enters the corresponding cooling channels on the main body 1. It flows in the cooling channels to cool the drive component 4. The cooled medium flows out through the cooling outlet 82 to ensure the reliability of the spindle structure.

[0047] The central core 2, transducer assembly 5, power receiving module 31, and power supply module 32 of this utility model are respectively provided with wire-passing holes (201, 51, 301, 501) to facilitate the passage of connecting wires between transducer assembly 5 and power receiving module 31, and connecting wires between power supply module 32 and external ultrasonic power supply, ensuring the reliability of ultrasonic energy transmission. In Embodiment 1, the connecting wire between power supply module 32 and external ultrasonic power supply passes through the central hole of power supply module 32, while in Embodiment 2, the connecting wire between power supply module 32 and external ultrasonic power supply exits from the end face of rear housing 8, facilitating connection and enabling reliable ultrasonic energy transmission.

[0048] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. An ultrasonic air-bearing electric spindle structure, characterized in that: It includes a body, a shaft, an energy transmission component, a drive component, and a transducer component. The shaft is disposed within the inner cavity of the body. The drive component is disposed between the body and the shaft, and drives the shaft to rotate relative to the body. A transducer assembly is disposed on the outer periphery of the rear end of the shaft core. The energy transmission assembly is disposed at the rear end of the shaft core and located on one side of the transducer assembly. The energy transmission assembly and the transducer assembly are electrically connected.

2. The ultrasonic air-bearing electric spindle structure according to claim 1, characterized in that: It also includes a rear housing, which is located at and connected to the rear end of the main body; The energy transmission assembly includes a power receiving module and a power supply module that are spaced apart. The power receiving module is located at the end of the rear end of the shaft and is connected to the transducer assembly. The outer wall of the power supply module is connected to the inner wall of the rear housing.

3. The ultrasonic air-bearing electric spindle structure according to claim 2, characterized in that: The power receiving module and the power supply module are arranged along the axial direction of the shaft core; The spindle structure also includes an adjusting component, which is located on the outer periphery of the power supply module and is movablely engaged with the power supply module.

4. The ultrasonic air-bearing electric spindle structure according to claim 3, characterized in that: It also includes a pressure cap, which is located at the mating point between the rear housing and the adjusting member and abuts against the adjusting member.

5. The ultrasonic air-bearing electric spindle structure according to claim 3, characterized in that: The power supply module has a connecting protrusion on its outer periphery, and the adjusting member is located on the outer periphery of the connecting protrusion.

6. The ultrasonic air-bearing electric spindle structure according to claim 4, characterized in that: The outer periphery of the adjusting member is provided with a limiting protrusion, which cooperates with the rear housing and abuts against the pressure cover for limiting.

7. The ultrasonic air-bearing electric spindle structure according to claim 3, characterized in that: The power receiving module is provided with a dynamic balancing hole, and the rear housing is provided with an operating hole corresponding to the position of the dynamic balancing hole, with a dust plug installed in the operating hole.

8. The ultrasonic air-bearing electric spindle structure according to claim 2, characterized in that: The power receiving module and the power supply module are arranged radially along the shaft core, and the power supply module abuts against and limits the inner sidewall of the rear housing end.

9. The ultrasonic air-bearing electric spindle structure according to any one of claims 1 to 8, characterized in that: It also includes a limiting ring, which is disposed on the outer periphery of the shaft core and located between the energy transmission component and the transducer component to limit the position of the transducer component.

10. The ultrasonic air-bearing electric spindle structure according to claim 1, characterized in that: It also includes an air bearing assembly, which is disposed on the outer periphery of the shaft core and is used to form an air film on the outer periphery of the shaft core.

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