Piezoelectric motor and driving device

Abstract

The utility model relates to the technical field of motor manufacturing, and provides a piezoelectric motor and a driving device, the piezoelectric motor comprises a pedestal, a piezoelectric body installed on the pedestal, and a first friction head and a second friction head respectively arranged on the left side and the right side of the piezoelectric body; the first rotating disc is rotationally installed on the base and arranged on the left side of the first friction head, and the first friction head abuts against the first rotating disc; and the second rotating disc is rotationally installed on the base and arranged on the right side of the second friction head, and the second friction head abuts against the second rotating disc. According to the utility model, one piezoelectric body can drive the two rotating discs at the same time, so that the efficiency of the piezoelectric motor is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor manufacturing, and in particular relates to a piezoelectric motor and a driving device. Background Art

[0002] With the continuous development of modern industry, the application scope of motors is becoming wider and wider. Piezoelectric motors have gradually attracted widespread attention due to their advantages such as high positioning accuracy, low speed and high torque, simple structure and no electromagnetic interference. However, the efficiency of piezoelectric motors is currently low. Utility Model Content

[0003] The purpose of the present invention is to overcome at least one of the deficiencies of the prior art and to provide a piezoelectric motor and a driving device. In the present invention, one piezoelectric body can drive two turntables at the same time, thereby improving the efficiency of the piezoelectric motor.

[0004] The technical solution of the utility model is: a piezoelectric motor, comprising: a piezoelectric body, installed on the base, and a first friction head and a second friction head are respectively arranged on the left and right sides of the piezoelectric body; a first turntable, rotatably installed on the base, arranged on the left side of the first friction head, and the first friction head abuts against the first turntable; a second turntable, rotatably installed on the base, and arranged on the right side of the second friction head, and the second friction head abuts against the second turntable.

[0005] As a further improvement of the present technical solution, the piezoelectric body is connected to a first connector, a second connector and a third connector, the first connector has a first drive circuit wiring portion, the second connector has a grounding portion, and the third connector has a second drive circuit wiring portion.

[0006] As a further improvement of the present technical solution, the base includes a main body, and a first support column connected to the main body and arranged on the left side of the first turntable, the first support column is provided with a first support member, the first support member is opposite to the first friction head and abuts against the first turntable; the base also includes a second support column connected to the main body and arranged on the right side of the second turntable, the second support column is provided with a second support member, the second support member is opposite to the second friction head and abuts against the second turntable.

[0007] As a further improvement of the present technical solution, the first support member includes a first elastic member and a first ball, one side of the first elastic member is connected to the first support column, and the other side is connected to the first ball, and the first ball rolls and abuts against the first turntable; the second support member includes a second elastic member and a second ball, one side of the second elastic member is connected to the second support column, and the other side is connected to the second ball, and the second ball rolls and abuts against the second turntable.

[0008] As a further improvement of the technical solution, the base is provided with a mounting frame, the piezoelectric motor further comprises a bracket arranged on the mounting frame, and the piezoelectric body is mounted on the bracket.

[0009] As a further improvement of the technical solution, the bracket includes a frame portion and two elastic portions arranged in the frame portion, the two elastic portions are arranged opposite to each other, and two ends of the piezoelectric body are elastically abutted against the two elastic portions respectively.

[0010] As a further improvement of the technical solution, the piezoelectric body includes a first piezoelectric layer, a first electrode layer, a second piezoelectric layer, a second electrode layer, a third piezoelectric layer and a third electrode layer which are stacked.

[0011] As a further improvement of the technical solution, the cross section of the first electrode layer is rectangular, and the first electrode layer is provided with four first electrode areas with rectangular cross sections; the cross section of the second electrode layer is rectangular, and the second electrode layer is provided with a grounding electrode area with a rectangular cross section; the cross section of the third electrode layer is rectangular, and the third electrode layer is provided with four third electrode areas with rectangular cross sections

[0012] The utility model also provides a driving device, comprising any one of the piezoelectric motors described above.

[0013] As a further improvement of the technical solution, the driving device includes a first driving circuit module, a grounding circuit module and a second driving circuit module.

[0014] The utility model provides a piezoelectric motor and a driving device, wherein the piezoelectric motor includes a base, a piezoelectric body, a first turntable and a second turntable. The piezoelectric body is installed on the base, and a first friction head and a second friction head are respectively provided on the left and right sides of the piezoelectric body; the first turntable is rotatably installed on the base, and is arranged on the left side of the first friction head, and the first friction head abuts against the first turntable; the second turntable is rotatably installed on the base, and is arranged on the right side of the second friction head, and the second friction head abuts against the second turntable. In the utility model, one piezoelectric body can drive two turntables at the same time, thereby improving the efficiency of the piezoelectric motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 is a front view of a piezoelectric motor provided by an embodiment of the utility model;

[0017] Figure 2 yes Figure 1 Sectional view at AA in the middle;

[0018] Figure 3 It is a three-dimensional diagram of a piezoelectric body in a piezoelectric motor provided by an embodiment of the utility model;

[0019] Figure 4a , Figure 4b and Figure 4c They are respectively front views of the first electrode layer, the second electrode layer and the third electrode layer in the piezoelectric motor provided by the embodiment of the utility model;

[0020] Figure 5 It is a schematic diagram of the working state of the piezoelectric motor provided in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] It should be noted that the terms “setting” and “connection” should be understood in a broad sense. For example, it can be directly setting or connecting, or it can be indirectly setting or connecting through a central component or a central structure.

[0023] In addition, if there are terms such as "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientation or positional relationship in the embodiments of the present invention, they are based on the orientation or positional relationship or the conventional placement state or use state shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must it be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] The various specific technical features and embodiments described in the specific implementation methods can be combined in any suitable manner unless there is any contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features / embodiments in the present utility model will not be described separately.

[0025] The utility model provides a piezoelectric motor, see Figures 1 to 5 The piezoelectric motor 100 includes a base 10, a piezoelectric body 20, a first turntable 30 and a second turntable 40. The piezoelectric body 20 is mounted on the base 10, and a first friction head 50 and a second friction head 60 are respectively arranged on the left and right sides of the piezoelectric body 20 (the side of the piezoelectric body 20 facing the first friction head 50 is the left side, and the side facing the second friction head 60 is the right side in the utility model); the first turntable 30 is rotatably mounted on the base 10, arranged on the left side of the first friction head 50, and the first friction head 50 abuts against the first turntable 30, and is used to drive the first turntable 30 to rotate; the second turntable 40 is rotatably mounted on the base 10, and is arranged on the right side of the second friction head 60, and the second friction head 60 abuts against the second turntable 40, and is used to drive the second turntable 40 to rotate. When voltage is applied to different parts of the piezoelectric body 20, the piezoelectric body 20 can be excited, thereby driving the first friction heads 50 on the left and right sides to do work. The first friction head 50 on the left side does work on the first turntable 30, driving the first turntable 30 to rotate, and the second friction head 60 on the right side does work on the second turntable 40, driving the second turntable 40 to rotate. In the utility model, one piezoelectric body 20 can drive two turntables at the same time, thereby improving the efficiency of the piezoelectric motor 100.

[0026] Preferably, the piezoelectric motor 100 may have a bilaterally symmetrical structure, which not only improves the aesthetics but also facilitates mold processing and reduces costs.

[0027] For the base 10, see Figure 1 and Figure 2 Optionally, the base 10 may include a main body 11, and a first supporting column 12 connected to the main body 11 and arranged on the left side of the first turntable 30, the first supporting column 12 is provided with a first supporting member 13, the first supporting member 13 is opposite to the first friction head 50, and abuts against the first turntable 30, for supporting the first turntable 30, ensuring that the first friction head 50 can abut and drive the first turntable 30 to rotate; similarly, the base 10 may also include a second supporting column 14 connected to the main body 11 and arranged on the right side of the second turntable 40, the second supporting column 14 is provided with a second supporting member 15, the second supporting member 15 is opposite to the second friction head 60, and abuts against the second turntable 40, for supporting the second turntable 40, ensuring that the second friction head 60 can abut and drive the second turntable 40 to rotate.

[0028] Furthermore, the first support member 13 may include a first elastic member 131 and a first ball 132, wherein one side of the first elastic member 131 is connected to the first support column 12, and the other side is connected to the first ball 132, and the first ball 132 rolls and abuts against the first turntable 30, wherein the first elastic member 131 provides a rightward elastic force to the first turntable 30 to ensure that the first friction head 50 can abut against and drive the first turntable 30 to rotate, and the first ball 132 abuts against the first turntable 30 to prevent the first support member 13 from affecting the rotation of the first turntable 30. The second support member 15 may include a second elastic member 151 and a second ball 152, wherein one side of the second elastic member 151 is connected to the second support column 14, and the other side is connected to the second ball 152, and the second ball 152 rolls and abuts against the second turntable 40, wherein the second elastic member 151 provides a leftward elastic force to the second turntable 40 to ensure that the second friction head 60 can abut against and drive the second turntable 40 to rotate, and the second ball 152 abuts against the second turntable 40 to prevent the second support member 15 from affecting the rotation of the second turntable 40.

[0029] In other embodiments, the first support member 13 may further include a first elastic member 131 and a first sliding belt arranged on the first elastic member 131 , and the first sliding belt can abut and slide along the rotation direction of the first turntable 30 to prevent the first support member 13 from affecting the rotation of the first turntable 30 .

[0030] Optionally, the base 10 may be provided with two bearing holes on both sides of the piezoelectric body 20, and the first bearing 71 and the second bearing 72 are respectively provided in the two bearing holes. The first turntable 30 may include a first plug-in rod 31 and a first rotating disk 32 arranged at one end of the first plug-in rod 31, and the first plug-in rod 31 is arranged corresponding to the first bearing 71. The second turntable 40 may include a second plug-in rod 41 and a second rotating disk 42 arranged at one end of the second plug-in rod 41, and the second plug-in rod 41 is arranged corresponding to the second bearing 72, so that the rotation of the first turntable 30 and the second turntable 40 can be smoother.

[0031] For the piezoelectric body 20, see Figure 3 Optionally, the piezoelectric body 20 may include a first piezoelectric layer 21, a first electrode layer 22, a second piezoelectric layer 23, a second electrode layer 24, a third piezoelectric layer 25 and a third electrode layer 26 which are stacked, and the piezoelectric layers and the electrode layers are alternately stacked to form the piezoelectric body 20.

[0032] For details, please refer to Figure 4a The cross section of the first electrode layer 22 may be rectangular, and the first electrode layer 22 may be provided with four first electrode regions 221 with rectangular cross sections; see Figure 4bThe cross section of the second electrode layer 24 may be rectangular, and the second electrode layer 24 may be provided with a grounding electrode region 241 having a rectangular cross section; see Figure 4c The cross section of the third electrode layer 26 may be rectangular, and the third electrode layer 26 is provided with four third electrode regions 251 with rectangular cross sections.

[0033] In specific applications, the four electrode areas of the first electrode layer 22 and the third electrode layer 26 can be distributed diagonally, and each electrode area can be connected from the side, and the two electrode areas at the diagonal position can be connected through the internal diagonal connection area; the second electrode layer 24k can be a whole-surface electrode area, an overall grounding electrode.

[0034] In a specific application, the electrode lead-out surface of the piezoelectric body 20 can be set on the front side of the piezoelectric body 20 (the surface away from the base 10). The preparation of the piezoelectric body 20 can be: firstly, the three electrode layers of the piezoelectric body 20 are led out from the side and a silver electrode layer with a specified width is printed on the side, then the electrode is printed on the front side of the piezoelectric body 20 and connected with the side electrode layer; finally, an insulating layer is printed on the side and bottom of the piezoelectric body 20 to protect the piezoelectric body 20.

[0035] In some embodiments, see Figure 1 The piezoelectric body 20 may be connected with a first connector 81, a second connector 82 and a third connector 83. The first connector 81 has a first drive circuit connection portion, the second connector 82 has a grounding portion, and the third connector 83 has a second drive circuit connection portion. The piezoelectric body 20 is connected to an external circuit via three connectors, which are respectively used to connect the first drive circuit module, the grounding circuit module and the second drive circuit module, so as to realize the state switching of the piezoelectric motor 100. Please combine Figure 5 The piezoelectric motor 100 of the utility model includes two working states and one stop state; specifically, when the piezoelectric body 20 is connected to the first drive circuit module and the ground circuit module, and disconnected from the second drive circuit module, the first turntable 30 and the second turntable 40 rotate clockwise respectively driven by the first friction head 50 and the second friction head 60; when the piezoelectric body 20 is connected to the second drive circuit module and the ground circuit module, and disconnected from the first drive circuit module, the first turntable 30 and the second turntable 40 rotate counterclockwise respectively driven by the first friction head 50 and the second friction head 60; when the piezoelectric body 20 is disconnected from the first drive circuit module and the second drive circuit module at the same time, the first turntable 30 and the second turntable 40 are in a self-locking state and stop rotating.

[0036] In specific applications, the first drive circuit module and the second drive circuit module can be sine, cosine or square wave waveform voltages. The voltage value and frequency of the first drive circuit module and the second drive circuit module are directly related to the size and layer thickness of the piezoelectric body 20. The piezoelectric body 20 of the embodiment of the utility model is preferably a lead zirconate titanate piezoelectric component, and the size of the piezoelectric body 20 can be 5.85mm×1.6mm×1.4mm, and the thickness of a single layer can be 40μm; the first drive circuit module and the second drive circuit module can use a 3.3V, 246K sinusoidal voltage as a driving power supply.

[0037] Specifically, the first connecting member 81 , the second connecting member 82 and the third connecting member 83 may be metal spring pieces, which have good electrical connectivity and corrosion resistance.

[0038] In some embodiments, the base 10 may be provided with a mounting frame 16 , and the piezoelectric motor 100 further includes a bracket 90 provided on the mounting frame 16 , and the piezoelectric body 20 is installed on the bracket 90 .

[0039] Optionally, the bracket 90 may include a frame portion 91 and two elastic portions 92 disposed in the frame portion 91, the two elastic portions 92 being disposed opposite to each other, and the two ends of the piezoelectric body 20 are elastically abutted against the two elastic portions 92. Specifically, the elastic portion 92 may be provided with a smooth elastic bending structure for abutting against the piezoelectric body 20.

[0040] Preferably, the bracket 90 may be a vertically symmetrical structure, which not only facilitates mold processing but also makes the force on the piezoelectric body 20 more balanced.

[0041] The utility model further provides a driving device, including the piezoelectric motor 100. In the utility model, one piezoelectric body 20 can drive two rotating disks at the same time, thereby improving the efficiency of the piezoelectric motor 100.

[0042] Preferably, the driving device may include a first driving circuit module, a grounding circuit module and a second driving circuit module; the first driving circuit connection portion of the first connecting member 81 is connected to the first driving circuit module, the grounding portion of the second connecting member 82 is connected to the grounding circuit module, and the second driving circuit connection portion of the third connecting member 83 is connected to the second driving circuit module. When the piezoelectric motor 100 is connected to different circuit modules, the working state of the piezoelectric motor 100 can be switched.

[0043] The utility model provides a piezoelectric motor and a driving device, wherein the piezoelectric motor 100 includes a base 10, a piezoelectric body 20, a first turntable 30, and a second turntable 40. The piezoelectric body 20 is mounted on the base 10, and a first friction head 50 and a second friction head 60 are respectively arranged on the left and right sides of the piezoelectric body 20; the first turntable 30 is rotatably mounted on the base 10, arranged on the left side of the first friction head 50, and the first friction head 50 abuts against the first turntable 30, and is used to drive the first turntable 30 to rotate; the second turntable 40 is rotatably mounted on the base 10, and is arranged on the right side of the second friction head 60, and the second friction head 60 abuts against the second turntable 40, and is used to drive the second turntable 40 to rotate. When voltage is applied to different parts of the piezoelectric body 20, the piezoelectric body 20 can be excited, thereby driving the first friction heads 50 on the left and right sides to do work. The first friction head 50 on the left side does work on the first turntable 30, driving the first turntable 30 to rotate, and the second friction head 60 on the right side does work on the second turntable 40, driving the second turntable 40 to rotate. In the utility model, one piezoelectric body 20 can drive two turntables at the same time, thereby improving the efficiency of the piezoelectric motor 100.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A piezoelectric motor, characterized in that: Includes base, plus: A piezoelectric body is mounted on the base, and a first friction head and a second friction head are respectively arranged on the left and right sides of the piezoelectric body; A first rotating disk is rotatably mounted on the base and is disposed on the left side of the first friction head, and the first friction head abuts against the first rotating disk; The second rotating disk is rotatably mounted on the base and is disposed on the right side of the second friction head, and the second friction head abuts against the second rotating disk.

2. The piezoelectric motor according to claim 1, wherein: The piezoelectric body is connected to a first connecting member, a second connecting member and a third connecting member, the first connecting member has a first drive circuit connection portion, the second connecting member has a grounding portion, and the third connecting member has a second drive circuit connection portion.

3. The piezoelectric motor according to claim 1 or 2, characterized in that: The base includes a main body, and a first support column connected to the main body and arranged on the left side of the first rotating disk, the first support column is provided with a first support member, the first support member is opposite to the first friction head and abuts against the first rotating disk; The base also includes a second supporting column connected to the main body and arranged on the right side of the second turntable. The second supporting column is provided with a second supporting member. The second supporting member is opposite to the second friction head and abuts against the second turntable.

4. The piezoelectric motor according to claim 3, characterized in that: The first support member includes a first elastic member and a first ball, one side of the first elastic member is connected to the first support column, and the other side is connected to the first ball, and the first ball rolls against the first rotating disk; The second support member includes a second elastic member and a second ball. One side of the second elastic member is connected to the second support column, and the other side is connected to the second ball. The second ball rolls and abuts against the second rotating disk.

5. The piezoelectric motor according to claim 1 or 2, characterized in that: The base is provided with a mounting frame, the piezoelectric motor further comprises a bracket arranged on the mounting frame, and the piezoelectric body is mounted on the bracket.

6. The piezoelectric motor according to claim 5, characterized in that: The bracket includes a frame portion and two elastic portions arranged in the frame portion. The two elastic portions are arranged opposite to each other, and two ends of the piezoelectric body are elastically abutted against the two elastic portions respectively.

7. The piezoelectric motor according to claim 1 or 2, characterized in that: The piezoelectric body includes a first piezoelectric layer, a first electrode layer, a second piezoelectric layer, a second electrode layer, a third piezoelectric layer and a third electrode layer which are stacked.

8. The piezoelectric motor according to claim 7, characterized in that: The first electrode layer has a rectangular cross section, and the first electrode layer is provided with four first electrode regions with rectangular cross sections; The second electrode layer has a rectangular cross section, and the second electrode layer is provided with a grounding electrode region having a rectangular cross section; The third electrode layer has a rectangular cross section, and the third electrode layer is provided with four third electrode regions with rectangular cross sections.

9. A driving device, characterized in that: Comprising the piezoelectric motor according to any one of claims 1 to 8.

10. The driving device according to claim 9, characterized in that: The driving device includes a first driving circuit module, a grounding circuit module and a second driving circuit module.

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