Piezoelectric motor, pan-tilt camera and electronic product

Abstract

The invention discloses a piezoelectric motor, a pan-tilt camera and an electronic product, the piezoelectric motor comprises a base, a piezoelectric assembly arranged on the base and a power output assembly in transmission connection with the piezoelectric assembly, a friction rod is arranged between the piezoelectric assembly and the power output assembly, and the friction rod is connected with the piezoelectric assembly. Motion generated by the piezoelectric assembly is transmitted to the power output assembly through the friction rod. According to the piezoelectric motor, the friction rod is driven to slide through the piezoelectric assembly, so that the friction rod drives the power output assembly to rotate, finally, the power output assembly outputs torque to achieve driving of the piezoelectric motor, and the piezoelectric motor is simple in structure, small in size and small in abrasion.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a piezoelectric motor, a pan / tilt camera and an electronic product using the piezoelectric motor. Background Art

[0002] With the development of electronic product technology, the application demand of micro motors in educational tablets and children's watches has gradually become apparent. Compared with traditional motors, piezoelectric motors have low speed and high torque; no electromagnetic noise, good electromagnetic compatibility; fast dynamic response, good control performance; self-locking when power off; no noise during operation; and micro-displacement characteristics. At present, the existing piezoelectric motors have a relatively complex structure and a large size, making it difficult to adapt to miniaturized products such as tablets and watches. In addition, the existing piezoelectric motors use the elliptical motion of the piezoelectric element to rub the rotating part to achieve the rotation of the rotating part. The friction between the piezoelectric element and the rotating part is single-point friction, and the wear between the piezoelectric element and the rotating part is serious, and the piezoelectric motor is easily damaged. Summary of the invention

[0003] One purpose of an embodiment of the present invention is to provide a piezoelectric motor which has not only a simple structure and a small size but also low wear.

[0004] Another purpose of an embodiment of the present invention is to provide a gimbal camera and an electronic product, wherein the gimbal camera can be miniaturized and can be easily applied to miniaturized electronic products.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] On the one hand, a piezoelectric motor is provided, comprising a base, a piezoelectric component arranged on the base, and a power output component transmission-connected to the piezoelectric component, wherein a friction rod is arranged between the piezoelectric component and the power output component, and the movement generated by the piezoelectric component is transmitted to the power output component through the friction rod.

[0007] Optionally, the friction rod is slidably mounted on the base, the piezoelectric component is disposed in the base and has a driving portion for driving the friction rod to slide, the driving portion abuts against the friction rod, at least part of the power output component is rotatably mounted in the base and abuts against the friction rod, and at least part of the power output component extends to the outside of the base to form a power output rod.

[0008] Optionally, the piezoelectric assembly includes a counterweight block, a piezoelectric element, and a vibration block; the counterweight block, the piezoelectric element, and the vibration block are connected in sequence, the vibration block abuts against the friction rod, and the driving unit is located on the vibration block.

[0009] Optionally, there are a plurality of piezoelectric elements, and the plurality of piezoelectric elements are arranged in sequence and spaced apart along a first straight line direction, and the first straight line direction is perpendicular to the rotation axis of the power output assembly.

[0010] Optionally, the piezoelectric elements are an even number, and the multiple piezoelectric elements are distributed in mirror symmetry with the second straight line direction as the center, the rotation axis of the power output assembly and the first straight line direction are both perpendicular to the second straight line direction and the second straight line direction passes through the rotation axis of the power output assembly.

[0011] Optionally, the counterweight block, the piezoelectric element, the vibration block, and the friction rod are arranged in sequence along the vertical direction, the second straight direction is parallel to the vertical direction, and the friction rod abuts against the power output assembly along the second straight direction.

[0012] Optionally, the piezoelectric motor further includes an elastic member; the elastic member is clamped between the base and the counterweight block, and the elastic member and the counterweight block are arranged in sequence along the vertical direction.

[0013] Optionally, the power output assembly includes a turntable connected to the power output rod; the turntable is rotatably mounted in the base via the power output rod, the power output rod extends to the outside of the base, and the friction rod abuts against the outer circumferential side of the turntable.

[0014] Optionally, a limiting groove is arranged on the outer circumferential side surface of the rotating disk, and the friction rod is located in the limiting groove and abuts against the bottom wall of the limiting groove.

[0015] Optionally, the base has an installation cavity; the turntable, the vibration block, the piezoelectric element, and the counterweight block are all installed in the installation cavity.

[0016] On the other hand, a gimbal camera is provided, having the piezoelectric motor as described above.

[0017] In another aspect, an electronic product is provided, comprising the piezoelectric motor as described above.

[0018] The beneficial effects of the present invention are as follows: the piezoelectric motor of the present invention drives the friction rod to slide through the piezoelectric component, so that the friction rod drives the power output component to rotate, and finally the power output component outputs torque to realize the driving of the piezoelectric motor. The piezoelectric motor of the present invention has a simple structure and a small volume. The piezoelectric component of the piezoelectric motor drives the power output component to rotate through the friction rod. By setting the friction rod in contact with the power output component, the friction area is increased, and single-point friction is avoided, so that the wear can be small, making the piezoelectric motor not easy to be damaged, and the life of the piezoelectric motor is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of a piezoelectric motor according to an embodiment of the present invention;

[0021] Figure 2 An exploded view of a piezoelectric motor according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic structural diagram of a piezoelectric component, an elastic member, a friction rod, a power output component, and a first housing according to an embodiment of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a power output assembly according to an embodiment of the present invention;

[0024] Figure 5 It is a connection diagram of the counterweight block, the piezoelectric element and the friction rod according to an embodiment of the present invention.

[0025] Description of the accompanying drawings:

[0026] 1. base; 11. first housing; 12. second housing; 13. mounting cavity; 111. first mounting groove; 112. shaft hole; 113. positioning hole; 114. first slide groove; 115. second slide groove; 116. positioning plate; 117. first interlocking plate; 121. second mounting groove; 122. second interlocking plate; 123. positioning column;

[0027] 2. Piezoelectric assembly; 21. Counterweight; 22. Piezoelectric element; 23. Vibration block;

[0028] 3. Friction rod; 31. First support portion; 32. Friction portion; 33. Second support portion;

[0029] 4. Power output assembly; 41. Power output rod; 42. Turntable; 421. Limiting groove; 422. First limiting surface; 423. Second limiting surface; 424. Bottom wall;

[0030] 5. Bearings;

[0031] 6. Elastic parts. DETAILED DESCRIPTION

[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "fixed", "connected", "communicated", "abutted", "clamped" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0037] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0038] Unless specifically stated or defined otherwise, the term "and / or" used in the present invention includes any and all combinations of one or more of the associated listed items.

[0039] For the convenience of description, unless otherwise specified, the up and down directions mentioned below are the same as Figure 3 The up and down directions are consistent with the left and right directions mentioned below. Figure 3 The left and right directions are consistent with the Figure 3 The projection direction itself is consistent.

[0040] like Figures 1 to 5 As shown, a piezoelectric motor includes a base 1, a piezoelectric component 2 arranged on the base 1, and a power output component 4 transmission-connected to the piezoelectric component 2. A friction rod 3 is arranged between the piezoelectric component 2 and the power output component 4, and the movement generated by the piezoelectric component 2 is transmitted to the power output component 4 through the friction rod 3. The piezoelectric inverse effect of the piezoelectric component 2 can be used for electromechanical energy conversion. The inverse piezoelectric effect refers to the phenomenon that the mechanical deformation of the crystal is caused by applying an alternating electric field to the crystal. When the alternating electric field is applied, the piezoelectric component 2 can move along an elliptical trajectory or a straight trajectory. When the piezoelectric component 2 moves along an elliptical trajectory or a straight trajectory, it pushes the friction rod 3, so that the friction rod 3 drives the power output component 4 to move, and finally the power output of the piezoelectric motor is realized through the power output component 4. The piezoelectric motor of the present invention has a simple structure and a small size. Compared with the friction method of directly driving the power output component to rotate through single-point contact between the piezoelectric component and the power output component, the piezoelectric motor of the present invention drives the power output component 4 to rotate through the friction rod 3. The contact between the friction rod 3 and the power output component 4 is line contact or surface contact, which increases the friction area, avoids single-point friction, and reduces the wear between the friction rod 3 and the power output component 4, making the piezoelectric motor less prone to damage and increasing the life of the piezoelectric motor.

[0041] Specifically, the power output assembly 4 is rotatably mounted on the base 1, at least part of the power output assembly 4 is rotatably mounted in the base 1 and abuts against the friction rod 3, at least part of the power output assembly 4 extends to the outside of the base 1 to form a power output rod 41, and the power output rod 41 is used to connect with an external component to realize the transmission of the piezoelectric motor. The piezoelectric assembly 2 is mounted in the base 1, and the friction rod 3 is slidably mounted on the base 1. The piezoelectric assembly 2 has a driving part for driving the friction rod 3 to slide, the driving part abuts against the friction rod 3, and the friction rod 3 abuts against the power output assembly 4.

[0042] Optionally, the driving part of the piezoelectric component 2 of the present embodiment moves along an elliptical trajectory, and the driving part can push the friction rod 3 to make a linear motion when moving, and the friction rod 3 drives the power output component 4 to rotate through the friction force. When the power output component 4 rotates, the power output component 4 rotates on the base 1 along its own rotation axis, and outputs torque through the power output component 4, so that the piezoelectric motor drives other components to rotate. In this way, the piezoelectric motor of the present invention drives the power output component 4 to rotate through the sliding of the friction rod 3, and the contact between the friction rod 3 and the power output component 4 is line contact or surface contact, which increases the friction area, avoids single-point friction, and reduces the wear between the friction rod 3 and the power output component 4. At the same time, the friction rod 3 abuts against the power output component 4 to achieve power-off self-locking of the piezoelectric motor and improve safety.

[0043] In one embodiment, the piezoelectric assembly 2 includes a vibration block 23 abutting against the friction rod 3, a piezoelectric element 22 mounted on the vibration block 23, and a counterweight block 21 mounted on the piezoelectric element 22. The counterweight block 21, the piezoelectric element 22, and the vibration block 23 are connected in sequence. The driving unit is located on the vibration block 23, and the vibration block 23 abuts against the friction rod 3 so that the driving unit abuts against the friction rod 3, and the friction rod 3 is driven to slide by the driving unit.

[0044] Specifically, the piezoelectric element 22 is clamped between the vibration block 23 and the counterweight block 21, and the friction rod 3 is clamped between the vibration block 23 and the power output assembly 4. The counterweight block 21, the piezoelectric element 22, the vibration block 23, and the power output assembly 4 are arranged in sequence from top to bottom, the driving part is located below the piezoelectric element 22, and the friction rod 3 abuts against the power output assembly 4 from top to bottom. The piezoelectric element 22 is a piezoelectric ceramic. When a high-frequency electric signal is applied to the piezoelectric ceramic, a high-frequency sound signal is generated. The high-frequency sound signal is a mechanical vibration, that is, an ultrasonic signal. The vibration block 23 acts as an inertial stabilizer, and the vibration block 23 generates ultrasonic traveling wave resonance through piezoelectric excitation. The counterweight block 21 applies downward pressure, so that the mechanical vibration generated by the piezoelectric element 22 is transmitted downward, so that the vibration block 23 can push the friction rod 3 to slide.

[0045] Optionally, there are multiple piezoelectric elements 22, and the multiple piezoelectric elements 22 are arranged in sequence along a first straight line direction, and the first straight line direction is perpendicular to the rotation axis of the power output assembly 4. The first straight line direction is a horizontal direction or a radial direction of the power output assembly 4, and the friction rod 3 slides along the first straight line direction. By providing multiple piezoelectric elements 22, mechanical vibration is increased, and the output stability of the piezoelectric motor is improved.

[0046] In one embodiment, the piezoelectric elements 22 are an even number, and the plurality of piezoelectric elements 22 are distributed in mirror symmetry with the second linear direction as the center. The rotation axis of the power output assembly 4 and the first linear direction are both perpendicular to the second linear direction, and the second linear direction passes through the rotation axis of the power output assembly 4. Specifically, the second linear direction is the radial direction of the power output assembly 4, and the second linear direction is vertically arranged. For ease of understanding, in this embodiment, the first linear direction is Figure 3 The left and right directions of the second straight line are Figure 3 The vertical direction of the power output assembly 4 is Figure 3 In the projection direction, this embodiment is described by taking the case where there are four piezoelectric elements 22 as an example.

[0047] Key References Figure 5 The piezoelectric motor of the present invention is a traveling wave ultrasonic motor. Specifically, when there are four piezoelectric elements, the four piezoelectric elements are P1, P2, P3, and P4 respectively; wherein P2 and P3 are mirror-symmetrical with the second straight line direction as the center, and P1 and P4 are mirror-symmetrical with the second straight line direction as the center. The length of the vibration block in the vertical direction = L, the wavelength λ = L / 2.25, the width of the piezoelectric element in the horizontal direction = (3 / 8)*λ, the P1 driving waveform = U0*cos(W*t), the P2 driving waveform = -U0*cos(W*t), the P3 driving waveform = U0*sin(W*t), the P4 driving waveform = -U0*sin(W*t), wherein U0 represents the driving voltage amplitude, which is determined by the material properties of the piezoelectric element, and W represents the driving angular frequency, which is determined by the material properties of the vibration block and the piezoelectric element, such as the size, stiffness index and density of the vibration block and the piezoelectric element, which can be determined by finite element simulation. P1 and P2 generate standing wave λ1=U0*cos(k*x)*cos(W*t), P1 and P2 generate standing wave λ2=U0*cos(x+π / 2)*sin(W*t), then, P1 and P2 synthesize traveling wave λ=λ1+λ2=U0*cos(k*x+W*t), where k is the wave number, x is the displacement of the piezoelectric element, and the calculation of P3 and P4 is the same, which will not be repeated here. The piezoelectric motor of the present invention adopts 2.25 wave number and four-segment linear piezoelectric element, with smaller structure and higher output efficiency.

[0048] It can be understood that when the number of piezoelectric elements is six, eight, etc., the working principle and parameter setting principle are the same.

[0049] In one embodiment, the counterweight 21, the piezoelectric element 22, the vibration block 23, and the friction rod 3 are arranged in sequence along the vertical direction, and the counterweight 21, the piezoelectric element 22, the vibration block 23, and the friction rod 3 are on the same vertical line to ensure that the ultrasonic wave is transmitted downward and improve the transmission efficiency. The second straight line direction is parallel to the vertical direction, the friction rod 3 abuts on the power output assembly 4 along the second straight line direction, the vibration block 23 abuts on the upper end surface of the friction rod 3, and the lower end surface of the friction rod 3 abuts on the power output assembly 4. When the friction rod 3 slides left and right, the power output assembly 4 is driven to rotate by friction. The counterweight 21, the piezoelectric element 22, and the vibration block 23 are rigidly connected by means of colloid or the like, so that the overall output efficiency is higher and the reliability of the motor is also higher.

[0050] Optionally, the piezoelectric motor also includes an elastic member 6; the elastic member 6 is clamped between the base 1 and the counterweight 21, and the elastic member 6 and the counterweight 21 are arranged in sequence along the vertical direction. Furthermore, the elastic member 6 is a spring, which is arranged vertically. The elastic member 6 applies elastic force along the vertical direction, thereby increasing the friction between the friction rod 3 and the power output assembly 4. The magnitude of the friction force can be adjusted by changing the elastic force of the spring. For example, replace springs with different parameter specifications. The spring applies pressure to the counterweight 21, so that there will be a lateral friction force when the vibration block 23 and the friction rod 3 are squeezed, so as to achieve the lateral positioning of the piezoelectric assembly 2. The lower end of the elastic member 6 can also be connected to the counterweight 21, and the upper end of the elastic member 6 is connected to the base 1, so as to achieve the lateral positioning of the piezoelectric assembly 2. In addition, a sliding channel extending along the vertical direction can also be formed on the base 1, and the piezoelectric assembly 2 slides up and down along the sliding channel. The inner wall of the sliding channel limits the lateral movement of the piezoelectric assembly 2 forward, backward, left and right.

[0051] In one embodiment, the power output assembly 4 includes a power output rod 41 and a turntable 42 connected to the power output rod 41. The power output rod 41 is an output shaft for outputting the torque of the piezoelectric motor. A bearing 5 is mounted on the base 1, and the output shaft is mounted on the bearing 5 to reduce friction. The turntable 42 is rotatably mounted on the base 1 through the power output rod 41, and the friction rod 3 abuts against the outer circumferential side of the turntable 42, and the friction rod 3 rubs against the outer circumferential side of the power output assembly 4, thereby driving the power output assembly 4 to rotate, and the power output assembly 4 drives the power output rod 41 to rotate, thereby realizing the torque output of the motor.

[0052] Optionally, a limiting groove 421 is provided on the outer circumferential side of the rotating disk 42, the limiting groove 421 is opened on the outer circumferential side of the rotating disk 42 and extends along the circumferential direction of the rotating disk 42, the width of the limiting groove 421 along the axial direction of the rotating disk 42 is equal to or greater than the width of the friction rod 3, the limiting groove 421 has a first limiting surface 422 and a second limiting surface 423 arranged at intervals along the axial direction of the rotating disk 42, and the friction rod 3 is located between the first limiting surface 422 and the second limiting surface 423. The friction rod 3 is located in the limiting groove 421 and abuts against the bottom wall 424 of the limiting groove 421, and the bottom wall 424 extends along the circumferential direction of the rotating disk 42.

[0053] In one embodiment, the base 1 has an installation cavity 13, and the friction rod 3 has a first support portion 31, a friction portion 32, and a second support portion 33; the first support portion 31, the friction portion 32, and the second support portion 33 are arranged in sequence along the sliding direction of the friction rod 3, and the first support portion 31 and the second support portion 33 are both slidably disposed on the base 1, and the lower end of the friction portion 32 abuts against the outer circumferential side surface of the turntable 42, and the outer circumferential side surface of the turntable 42 supports the lower end of the suspended friction portion 32.

[0054] It can be understood that the turntable 42, the vibration block 23, the piezoelectric element 22, and the counterweight block 21 are all installed in the installation cavity 13 to prevent dust. A first slide groove 114 and a second slide groove 115 are provided on the inner wall of the installation cavity 13. The first slide groove 114 and the second slide groove 115 penetrate the base 1 in the horizontal direction. The first support portion 31 of the friction rod 3 is slidably arranged in the first slide groove 114, and the second support portion 33 of the friction rod 3 is slidably arranged in the second slide groove 115.

[0055] In one embodiment, the base 1 includes a first shell 11 and a second shell 12 ; the first shell 11 and the second shell 12 are detachably connected and together enclose a mounting cavity 13 .

[0056] Optionally, a first mounting groove 111 is provided on the first shell 11 , and a second mounting groove 121 is provided on the second shell 12 . The inner wall of the first mounting groove 111 and the inner wall of the second mounting groove 121 together enclose a mounting cavity 13 .

[0057] Optionally, an axial hole 112 and a positioning hole 113 are opened on the inner wall of the first mounting groove 111 ; the axial hole 112 and the positioning hole 113 are connected, the power output rod 41 passes through the axial hole 112 and extends to the outside of the mounting cavity 13 , and the bearing 5 is installed in the positioning hole 113 .

[0058] In one embodiment, the first slide groove 114 and the second slide groove 115 are both provided on the first shell 11 , and the second shell 12 is installed on the first shell 11 and covers the upper notches of the first slide groove 114 and the second slide groove 115 to achieve the positioning of the friction rod 3 in the vertical direction.

[0059] It can be understood that when the elastic member 6 is a spring, a positioning column 123 is provided on the inner wall of the second mounting groove 121, the number of the positioning columns 123 is the same as the number of springs and corresponds one to one, one end of the spring is sleeved on the positioning column 123, and the other end of the spring abuts against the counterweight block 21 of the piezoelectric component 2.

[0060] Furthermore, a positioning plate 116 is provided on the first housing 11, and the positioning plate 116 is integrally formed with the first housing 11. A first interlocking plate 117 is provided on the positioning plate 116; a portion of the first interlocking plate 117 is located in the first mounting groove 111, and the shaft hole 112 and the positioning hole 113 are sequentially passed through the first interlocking plate 117 and the positioning plate 116, so that the overall strength of the base 1 is greater and the support for the power output rod 41 is more stable. A second interlocking plate 122 is provided on the second housing 12, and the second interlocking plate 122 is integrally formed with the second housing 12. In this way, during the connection process of the first shell 11 and the second shell 12, the second mosaic plate 122 on the second shell 12 is inserted into the first mounting groove 111 and the side surface of the second mosaic plate 122 abuts against the inner wall of the first mounting groove 111, thereby realizing the positioning of the second mosaic plate 122 in the up, down, left and right directions. The second shell 12 continues to slide back and forth along the first mounting groove 111. When the second shell 12 abuts against the positioning plate 116, the positioning of the second shell 12 and the first shell 11 is completed, and the first mosaic plate 117 is inserted into the second mounting groove 121 and the side surface of the first mosaic plate 117 abuts against the inner wall of the second mounting groove 121, thereby completing the positioning.

[0061] In general, the piezoelectric motor of the present invention has the advantages of miniaturization, high torque, high precision, self-locking when power is off, no noise, and low wear, and can be applied to micro-control systems of products such as tablets, telephone watches, etc.

[0062] At the same time, the embodiment of the present application also provides a pan-tilt camera having the piezoelectric motor as described above. Applying the piezoelectric motor to the pan-tilt camera makes the overall volume of the pan-tilt camera more compact, making it easier to apply the pan-tilt camera to miniaturized electronic products such as tablet computers and smart watches.

[0063] An embodiment of the present application also provides an electronic product having the piezoelectric motor as described above. The electronic product may include a gimbal camera, wherein the gimbal camera is driven by the piezoelectric motor. The electronic product may be a small electronic product such as a tablet computer and a smart watch.

[0064] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A piezoelectric motor, characterized in that: The invention comprises a base (1), a piezoelectric component (2) arranged on the base (1), and a power output component (4) transmission-connected to the piezoelectric component (2); a friction rod (3) is arranged between the piezoelectric component (2) and the power output component (4); and the movement generated by the piezoelectric component (2) is transmitted to the power output component (4) via the friction rod (3).

2. The piezoelectric motor according to claim 1, wherein: The friction rod (3) is slidably mounted on the base (1); the piezoelectric component (2) is disposed in the base (1) and has a driving portion for driving the friction rod (3) to slide; the driving portion is in contact with the friction rod (3); at least a portion of the power output component (4) is rotatably mounted in the base (1) and in contact with the friction rod (3); at least a portion of the power output component (4) extends to the outside of the base (1) to form a power output rod (41).

3. The piezoelectric motor according to claim 2, wherein: The piezoelectric assembly (2) comprises a counterweight block (21), a piezoelectric element (22), and a vibration block (23); the counterweight block (21), the piezoelectric element (22), and the vibration block (23) are connected in sequence, the vibration block (23) abuts against the friction rod (3), and the driving unit is located on the vibration block (23).

4. The piezoelectric motor according to claim 3, characterized in that: There are a plurality of piezoelectric elements (22), and the plurality of piezoelectric elements (22) are sequentially arranged at intervals along a first straight line direction, wherein the first straight line direction is perpendicular to the rotation axis of the power output assembly (4).

5. The piezoelectric motor according to claim 4, characterized in that: The piezoelectric elements (22) are an even number, and the plurality of piezoelectric elements (22) are distributed in a mirror-symmetrical manner with the second straight line direction as the center. The rotation axis of the power output component (4) and the first straight line direction are both perpendicular to the second straight line direction, and the second straight line direction passes through the rotation axis of the power output component (4).

6. The piezoelectric motor according to claim 5, characterized in that: The counterweight block (21), the piezoelectric element (22), the vibration block (23), and the friction rod (3) are arranged in sequence along the vertical direction, the second straight line direction is parallel to the vertical direction, and the friction rod (3) abuts against the power output assembly (4) along the second straight line direction.

7. The piezoelectric motor according to claim 6, characterized in that: It also comprises an elastic member (6); the elastic member (6) is clamped between the base (1) and the counterweight block (21); the elastic member (6) and the counterweight block (21) are arranged in sequence along the vertical direction.

8. The piezoelectric motor according to any one of claims 2 to 6, characterized in that: The power output assembly (4) comprises a turntable (42) connected to the power output rod (41); the turntable (42) is rotatably mounted in the base (1) via the power output rod (41); the power output rod (41) extends to the outside of the base (1); and the friction rod (3) abuts against the outer circumferential side surface of the turntable (42).

9. The piezoelectric motor according to claim 8, characterized in that: A limiting groove (421) is provided on the outer circumferential side surface of the rotating disk (42), and the friction rod (3) is located in the limiting groove (421) and abuts against the bottom wall (424) of the limiting groove (421).

10. The piezoelectric motor according to claim 8, wherein: The base (1) has a mounting cavity (13); the rotating disk (42), the vibration block (23), the piezoelectric element (22), and the counterweight block (21) are all mounted in the mounting cavity (13).

11. A pan-tilt camera, characterized in that: A piezoelectric motor according to any one of claims 1 to 10.

12. An electronic product, characterized in that: A piezoelectric motor according to any one of claims 1 to 10.

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