Ultrasonic motor with hollow structure

Abstract

The utility model relates to an ultrasonic motor, in particular to an ultrasonic motor with a hollow structure, which comprises a shell, a stator and a rotor are arranged in the shell, a hollow channel for a medium to pass through is arranged between the stator and the rotor, a medium output device is arranged on the rotor, and the medium output device rotates along with the rotor. And the output direction of the medium output device can be changed, the overall structure is small, and installation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to an ultrasonic motor, especially to a hollow structure ultrasonic motor. BACKGROUND

[0002] The ultrasonic motor is a new type of driver based on the ultrasonic frequency vibration of functional ceramics, comprising a stator and a rotor, the stator comprises piezoelectric material and an elastic body, the piezoelectric material will produce micro-vibration when an alternating voltage is applied, then the micro-vibration is amplified through the elastic body and transmitted to the rotor in the form of friction, a friction material layer is usually installed between the rotor and the stator, a pre-pressure adjusting ring is installed between the rotor and the stator, the pre-pressure adjusting ring is connected with the rotor through a bearing, the pressure between the rotor, the friction ring material layer and the elastic body is adjusted through the pre-pressure adjusting ring, and the stability of force transmission is ensured.

[0003] Compared with the traditional motor, the ultrasonic motor has the following characteristics and advantages: low-speed large torque output; high power density; good start-stop control; direct driving can be realized; accurate positioning can be realized; it is easy to make a linear moving ultrasonic motor; low noise: no electromagnetic interference and not affected by electromagnetic interference. Two significant features of the ultrasonic motor are: 1. low-speed large torque output; 2. maintaining large torque, macroscopically showing good start-stop control.

[0004] Due to the high working stability and small size of the ultrasonic motor, it can be applied to control the flow of medium. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at overcoming the defects in the prior art, and provides a hollow structure ultrasonic motor for controlling the flow of medium based on an ultrasonic motor.

[0006] The utility model is realized through the following technical schemes: a hollow structure ultrasonic motor, comprising a shell, a stator and a rotor are arranged in the shell, a hollow channel for passing medium is arranged between the stator and the rotor, and a medium output device is arranged on the rotor.

[0007] Further, the medium output device is connected with the rotor through a connecting ring.

[0008] Further, a detection device for detecting the rotation angle of the rotor is further arranged on the shell, and the detection device cooperates with the outer wall of the rotor.

[0009] Further, the medium is light, the medium output device is a lens, and the projection of the lens can change during the rotation of the rotor.

[0010] Further, the detection device comprises a grating displacement sensor, a trigger plate that cooperates with the grating displacement sensor is arranged on the rotor, and a scale grating is arranged on the trigger plate.

[0011] Further, the trigger plate is sleeved on the outer side of the upper end of the rotor.

[0012] Further, the shell is further connected with a base plate, the base plate is arranged at one end close to the stator, and the base plate is provided with an opening for passing the medium.

[0013] The utility model discloses the beneficial effect lies in: the hollow channel for passing the medium is arranged between the stator and the rotor, the medium output device is arranged on the rotor, the medium enters the medium output device after passing the hollow channel, the medium output device rotates along with the rotor, and the output direction of the medium output device can be changed, the whole structure is small, and installation is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the front view sectional schematic drawing of example 1;

[0015] Figure 2 It is the sectional schematic drawing of rotor and stator connecting place;

[0016] Figure 3 It is the overhead schematic drawing of elastomer;

[0017] Figure 4 It is the medium output plate schematic drawing of example 2.

[0018] Wherein: 1, shell;2, base plate;3, elastomer;4, connecting seat;5, rotor;6, bearing;7, pre-pressure adjusting ring;8, lens;9, compression ring;10, grating displacement sensor;11, trigger plate;12, connecting ring;13, piezoelectric material layer;14, friction material layer;15, grating displacement sensor installation groove;16, connecting hole;17, medium blocking plate;18, medium passing port;19, hollow channel;20, opening. DETAILED DESCRIPTION

[0019] In the description of the utility model, need explaining further, unless another explicit provision and limitation, the term " setting " " install " " connect " " connect " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;It can be directly connected, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements inside.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific conditions.

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] Example 1

[0022] like Figures 1-3 As shown, a hollow ultrasonic motor includes a housing 1, within which a stator and a rotor 5 are installed. Specifically, a base plate 2 is connected to the housing, and the base plate 2 is installed near the stator. An opening 20 for the passage of a medium is machined on the base plate 2, through which a medium output device is connected for easy connection. The stator includes an elastic body 3, which is annular. An annular connecting seat 4 is connected to the outer edge of the elastic body 3. The elastic body 3 is connected to the housing 1 and the base plate 2 via the connecting seat 4. All three components are machined with connecting holes 16, and are then positioned and fixed together by positioning pins. Semi-threaded bolts can be selected as positioning pins. A piezoelectric material layer 13 is installed on the lower end face of the elastic body 3 and is connected to the power source. A friction material layer 14 is installed on the upper end face of the elastic body 3. The lower end face of the rotor 5 mates with the friction material layer 14. A pre-pressure adjustment ring 7 is threadedly connected to the upper end of the outer shell. The pre-pressure adjustment ring 7 is connected to the rotor 5 by a bearing 6. The pressure between the rotor 5, the friction ring material layer, and the elastic body 3 is adjusted by rotating the pre-pressure adjustment ring 7.

[0023] A hollow channel 19 for the medium to pass through is reserved between the stator and the rotor 5. A medium output device is installed on the rotor 5. In this embodiment, the medium is light and the medium output device is a lens 8. The projection of the lens 8 can change as it rotates with the rotor 5. Specifically, there is a projection pattern layer on the lens 8. The angle of the projection pattern layer changes as the lens 8 rotates with the rotor 5, and the corresponding projection pattern also changes. It can be used for ambient lights, projection lights and other light source devices that need to change the projection effect. It can be connected to the light output port of the light source device through the base plate 2 for easy installation.

[0024] The media output device is connected to the rotor 5 via a connecting ring 12. Since the lens 8 is usually made of a fragile material, the connecting ring 12 can prevent damage to the edge of the lens 8. A clamping ring 9 is threaded on the upper end of the rotor 5, and the connecting ring 12 is clamped by the clamping ring 9 to fix the lens 8.

[0025] The shell 1 is further provided with a detection device for detecting the rotation angle of the rotor 5, and the detection device is matched with the outer wall of the rotor 5. Specifically, the detection device comprises a grating displacement sensor 10. The grating displacement sensor 10 is selected from Millet-O8x open grating displacement sensors of Shenzhen Yingnuo Servo Technology Co., Ltd. and is based on the formation of Moire fringes for detection, with high detection accuracy. A grating displacement sensor mounting groove 15 is processed on the connecting seat to position the grating displacement sensor 10. The rotor 5 is integrally formed with a trigger plate 11 matched with the grating displacement sensor 10. The scale grating of the Millet-O8x open grating displacement sensor is integrally processed on the trigger plate 11, thereby reducing the temporary use of space. The trigger plate 11 is sleeved on the outer side of the upper end of the rotor 5, thereby strengthening the coaxial positioning between the rotor 5 and the elastic body 3. The rotation angle of the rotor 5 is detected by the grating displacement sensor 10 and then fed back to the upper computer to control the rotation of the rotor 5.

[0026] Embodiment 2

[0027] As shown in Figure 4 A hollow structure ultrasonic motor, which is different from the first embodiment, is shown. The connecting ring 12 is connected to the dielectric barrier plate 17. The dielectric passage 18 is processed on the dielectric barrier plate 17. The dielectric passage 18 is distributed away from the middle of the dielectric barrier plate 17. The nozzle is installed at the dielectric passage 18 and can be used for water, powder, gas and other flowing media. The lens 8 is installed at the dielectric passage 18 and can be used for passing light. The angle of the dielectric passage 18 changes during the rotation of the rotor 5, thereby changing the output direction of the medium.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A hollow structure ultrasonic motor comprising a housing, a stator and a rotor disposed in the housing, characterized in that, The hollow channel for passing the medium is arranged between the stator and the rotor, and the medium output device is arranged on the rotor.

2. The hollow structural ultrasonic motor of claim 1, wherein The medium output device is connected with the rotor through a connecting ring.

3. The hollow structural ultrasonic motor of claim 2, wherein The housing is further provided with a detection device for detecting the rotation angle of the rotor, which cooperates with the outer wall of the rotor.

4. The hollow structural ultrasonic motor of claim 3, wherein The medium is light, the medium output device is a lens, and the lens projects a changeable image during rotation of the rotor.

5. The hollow structural ultrasonic motor of claim 3, wherein The detection device comprises a grating displacement sensor, and a trigger plate cooperated with the grating displacement sensor is arranged on the rotor, and a scale grating is arranged on the trigger plate.

6. The hollow structural ultrasonic motor of claim 5, wherein, The trigger plate is sleeved on the outer side of the upper end of the rotor.

7. The hollow structural ultrasonic motor of claim 1, wherein The housing is further connected with a base plate, which is arranged at one end close to the stator, and the base plate is provided with an opening for passing the medium.

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