TW562904B - Inverse piezoelectric actuated clutch - Google Patents

Abstract

Disclosed is an inverse piezoelectric actuated clutch, comprising a driving element and a driven friction element which one of the driving element and the driven friction element is constituted by piezoelectric elements. The driving element is fix connected with a motor spindle while the driven friction element is fix connected with a driven shaft. When the motor is powered, the driving element rotates synchronously with the output spindle of the motor. If the piezoelectric element is applied with an alternating current power source with a frequency close to the inherent frequency of the piezoelectric element, the piezoelectric element will be subject to the inverse piezoelectric effect and generates a mechanical resonance, so as to separate the contact surface with the driven friction element, thereby unable to drive the driven friction element to rotate the driven shaft. On the other hand, if the driving power source of the piezoelectric elements is cut off, the piezoelectric element cannot generate driving force for the mechanical resonance and the driving element is tightly connected with the driven friction element, enabling the driven shaft to rotate to output torque.

Description

5629〇4 Λ7 B7 0919-PB91064c Instruction F.doc-3/3 V. Description of the invention (Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs [Technical Field] The present invention relates to a reverse piezoelectric actuated clutch, especially Refers to a piezoelectric ceramic material that uses the inverse piezoelectric effect, that is, the piezoelectric ceramic material is subject to an electric field to generate a strain phenomenon that is proportional to the electric field. Then use the piezoelectric ceramic material's inverse piezoelectric effect to generate mechanical resonance and driving force By engaging or disengaging the driving element and the driven friction parts, the machine can achieve the clutch performance of starting, stopping, and shifting. [Prior technology] There are many types of clutches currently used. According to their control methods, they can be divided into control type and automatic type. The functions of the clutch are as follows: start, stop, reversing, speed change, or also for the engagement or disengagement of the shaft and the shaft ..... In special occasions, the types of the clutch are as described later ... (1) Embedded Clutch: The torque is transmitted through the fitting of teeth, teeth or keys. The end faces of its two joints have raised teeth or teeth. If the driving element and the When the teeth or teeth on the driven element are fitted or disengaged from each other, the main and driven shafts can be engaged or disengaged, but there is an impact during the engagement. Therefore, the speed difference between the two shafts should not be too large.% Friction clutch : Use the friction force to transfer the torque of the clutch. During the engagement, the 'driving element and driven friction member will be pressed under force. When the driving shaft rotates', a t friction force will be generated between the joint surfaces to drive the driven shaft to rotate. When the driving element and the friction part are pre-separated, the pressing force disappears, the joint surface is separated, and the friction force is ______-3-'i-size scale (21 ^ 7¾ 10 15 20 (Please read the precautions on the back before filling in this Page) V. Description of the invention (2) 064c Manual F.doc-4M The disappearance of the W printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs will cause the driven shaft to separate rapidly; the friction parts of clutch engagement and small 'overload' will cause friction Will be sent, and the impact is also compared: use; but the driven shaft | master & ± raw hit β also has overload protection for 5 amount of slip guide ^: The shaft can not be strictly synchronized, the friction parts are finely adjusted and replaced. DW 'So Need to pass (3) air flexible clutch: 2 wiper connection Or clutch. It: ^ ㈣ transmission power can reach tens of thousands of kilowatts, has the performance of reducing the vibration and overload protection of the drive shaft system; but the quality is large, and the cost is higher. (4) Magnetic powder clutch: using a magnetic coil The magnetic powder is magnetized to form a magnetic powder chain to transmit torque. When the current is increased, the magnetic field is strengthened, the magnetic powder chain transmits torque. This clutch is fast on and off, and the operation f is stable, which can synchronize the master and slave shafts with a speed difference It works under braking conditions; it can play an overload protection function by magnetic powder slip, and it is easy to achieve stepless speed regulation by controlling the current. (5) Overrunning clutch: the use of ratchets, ratchets, or rollers, wedges, and wedges. To transfer motion or torque. When the driving shaft rotates backward or the speed is lower than the driven shaft, the clutch is automatically disengaged. It is a directional clutch. The muffle type has a simple structure, but has a large external size and noise in the separated state. It is often used in low-speed applications where it is not important. In this way, there must be a driving element and a driven element whose speed of joining and disengaging is fast and easy to operate, and the vibration and shock of the joining and disengagement -4- 15 20 This paper size is applicable to the Chinese National Standard (CNS) Λ4 specification (2 丨 0x297 (Mm) (please read the specific matter of the law first and fill in the% ir) 5. Description of the invention (3) 0919-PB91064c Instruction F.doc -5/5 10 15 Printed by R Industrial Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 20 Smaller, and the clutch is thinner or lighter, or the motor power is reached. The clutch is not available, or the clutch that controls the horse's power transmission by using frequency and electricity is not available. The cover b shows that there are still many shortcomings in the above-mentioned conventional items. In fact, the designer of this case is in urgent need of improvement. In view of the various shortcomings derived from the clutches mentioned above, the inventor of this case has improved and innovated, and after many years of hard work and enthusiasm = nine, finally successfully developed this piece. Reverse piezo-actuated clutch. [Objective of the invention] ^ The purpose of the present invention is to provide a reverse piezo-actuated clutch which is a clutch that uses torque to transmit torque. Whether the driving element or the piezoelectric element in the driven friction part is energized or not is controlled. Then the driving part fixed to the shaft of the motor will resonate; the driven friction part will be pressed under a certain pressure. When the driving shaft rotates, 'the joint surface is used. The friction force between them drives the driven shaft to rotate. On the other hand, if the driving element and the driven friction element are to be separated, they can be applied by piezoelectric ceramics in a piezoelectric element (for example: Langevin piezoelectric vibrator). The alternating current power source (alternating electric field) makes the piezoelectric ceramics free. 1. Under the action of an external electric field, its internal positive and negative charge centers shift, leading to: the phenomenon of thickness shrinkage deformation (volume shrinkage deformation) of piezoelectric ceramics, and Separate the driving element and the driven friction member. A second object of the present invention is to provide a reverse piezoelectric actuated clutch. When the piezoelectric element is connected to an AC power source and the power frequency is connected to -5- (please read the first Note #Fill in this page)

I This paper size applies to China National Standards (CNS) Λ4 grid (210X297 mm) 562904 A7 B7 0919-PB91064C instruction manual F.doc-6/6 V. Description of invention (4) Printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs When the mechanical resonance frequency of a near-piezo element is controlled, a simple resonance motion (Harmonic Motion), mechanical resonance, and near-field acoustic levitation of the mechanical resonance frequency will be generated on the surface of the metal back plate of the piezoelectric element. ) Effect, and then use the effect of the Radiation pressure field (Radiation pressure) to make the object achieve the effect of floating. Another object of the present invention is to provide an inverse piezoelectric actuated clutch to provide a motor power transmission without electromagnetic interference, and the volume of the driving element and the driven friction member can be light and thin. ϋ Another object of the present invention is to provide a coupler, which can adjust the symmetrical pre-electric actuator provided on the support body, and adjust the distance between the spring fixing plate and the pre-tension adjusting device. Because of this, the driving element and the driven friction element exert a pre-force. Therefore, the pre-tension adjusting device can also be adjusted to control the friction between the driving element and the driven friction element, thereby indirectly controlling the power output by the motor. [Technical content] The inverse piezoelectric actuated clutches that can achieve the above-mentioned objects of the invention are: ° Motor, which is used to provide a source of rotational power; Motor shaft ~, is a shaft drive element connected to the motor power;-Drive Element, which is composed of a piezoelectric element, and is fixed at -6 _ W feet Qian Cai Guan Xiang Jing 1 Ding 15 Including and 562904 Λ7 V. Description of the invention (5) 0919-PB91064c Specification F.doc-7 / 7 10 15 20 Motor shaft ", when the piezoelectric element has no external electric field, it will be engaged with the driven friction member; conversely, when the piezoelectric element is subjected to an external electric field, its internal positive and negative charge centers will shift, resulting in The 70 pieces of piezoelectric material undergo thickness shrinkage deformation (volume shrinkage deformation), and have the function of separating the inverse piezoelectric actuated clutch from the driven friction member. The center-position positioning device is a protruding positioning device, which is arranged at the joint of the driving element. Face ±, the shape of the positioning device can fit into the groove of the positioning groove; the driven friction piece is composed of a hard-bottomed disc, which is fixed to the driven shaft. It is given through the piezoelectric element of the driving element. Waiwai Electric Role, can achieve the role of reverse piezoelectric actuated clutch disengagement;-a positioning groove, is a recessed recess provided on the joint surface of the driven friction member, when the driving element and the driven friction member are separated At this time, the center positioning device on the driving element will be placed in the positioning groove, so that the driving element and the driven friction member will not be offset when they are engaged; a driven shaft, one end of which is in phase with the driven friction member. Connected to the other end, and the other end is connected to the load end; an AC power supply, which provides an AC power and drives the piezoelectric element through the power control switch (for example: piezoelectric ceramic resonator 'or Langewen piezoelectric Vibrator), an electrostrictive effect that causes a piezoelectric sheet or vibrator to be deformed due to the external electric field, that is, the inverse piezoelectric effect; a power control switch, which is a booklet of the input end of the power supply and the AC power supply Paper size applies to China National Standard (CNS) Λ4 specifications (210x ^^ ~ V. Description of the invention ((A7 B7 0919-PB91064C instruction manual F.doc-8/8 successively, and the output end plate Mφ-,, I electric 7〇 Pieces (eg Such as: piezoelectric ceramic resonator or Langewen piezoelectric vibrator) successively; (Please read the precautions on the back before filling in this page) _ / 衮 珠 bearing 'The inner diameter of the bearing is pivoted on the driven shaft At the predicted position, 'and the outer diameter of the bearing can be accommodated in the inner hole of the spring fixed plate; / the spring fixed plate' is a ring-shaped fixed plate, and the inner hole of the fixed plate can be placed. Into the ball bearing; a spring 'is installed between the spring fixing plate and the pre-tension adjusting device. By adjusting the pre-tension adjusting device, the distance between the driving element and the joint surface from the 10th friction 彳 can be adjusted and changed. The magnitude of the pre-force applied to the driven friction piece; a pre-tension adjusting device, which is an external screw, a cylinder with a spiral groove on the outer circular surface, is installed in a preset internally threaded circular hole of the support body, and is used for In order to increase or decrease the friction force on the joint surface between the driving element and the driven friction member I5; a linear bearing, the inner diameter of the bearing is pivotally located outside the driven shaft: up 'and the outer diameter of the bearing is just right Receiving into the inner hole of the support; employees of the Bureau of Intellectual Property, Ministry of Economic Affairs Fei Cooperative printed 20 a support body, which is provided at the center with an inner hole that can be inserted into the outer diameter of the linear bearing, and the outer diameter of a driven shaft is placed and fixed in the inner hole of the linear bearing. By adjusting the symmetrical pre-tension adjusting device provided on the support body, the distance between the spring fixing plate and the pre-tension adjusting device is adjusted, thereby directly adjusting the friction force of the joint surface of the driving element and the driven friction member; -8 Standard paper size) Λ4 size (210X297 mm) 5629〇4 A7 B7 'Invention description (7) A Langewen piezoelectric vibrator is a pair of hollow piezoelectric ceramics with opposite polarization directions and connected back to back. Then, it is placed in the middle of a pair of cylindrical metal blocks, and the piezoelectric ceramic and the cylindrical metal block are fixed through a threaded bracket. When an AC power source 5 is applied to the piezoelectric ceramic, it will cause the inverse deformation of the piezoelectric ceramic itself. Piezoelectric effect. When the Lan Jiewen piezoelectric vibrator is connected to an AC power source and the frequency of the power source is close to the mechanical resonance frequency of the Lan Jiewen piezoelectric vibrator, a simple harmonic motion (Harmonic Motion) on the surface of the cylindrical metal block will occur. Field sonic floating effect (Near_Field 10 Acoustic Levitation), and then use the effect of the radiation pressure (Radiation Pressure) to make the driven friction member floating effect; and a piezoelectric ceramic spectrum vibrator, which consists of a silver electrode, piezoelectric ceramics After being composed with a metal back plate. Its effect is the same as that of Lan Jiewen's piezoelectric vibrator. When the piezoelectric ceramic is added to the AC power source, it will cause the piezoelectric ceramic itself to undergo the inverse piezoelectric effect. When an AC power supply is added to a piezoelectric ceramic resonator, and the power supply frequency is close to the mechanical resonance frequency of the piezoelectric ceramic resonator, a simple harmonic motion (Harmonic Motion) and near-field acoustic wave of mechanical resonance frequency will be generated on the surface of the metal back plate. 20 Dynamic effect (Near-Field Acoustic Levitation), and then use the effect of radiation pressure (Radiation Pressure) to make the driven friction parts achieve the effect of floating. [Brief description of the drawings] Please refer to the following detailed description of a preferred embodiment of the present invention. -9- This paper size applies the Chinese National Standard (CNS) Λ4 specification (210X297 mm) -if. (Please read the back (Please fill in this page again)

0919-PB91064c Instruction F.doc-9/9 5 Printed by the Consumers' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 562904 Α7 Β7 0919-PB91064C Description 軎 F.doc-10 808 5. Description of Invention (8) and its drawings, will You can further understand the technical content of the present invention and its purpose and effectiveness; the drawings related to this embodiment are: (Please read the precautions on the back before filling this page) Figure 1 (A) shows the reverse piezoelectric actuated clutch of the present invention A perspective view of the Lan Jiewen piezoelectric vibrator; Figure 1 (B) is an AC power wiring view of the Lan Jiewen piezoelectric vibrator of the inverse piezoelectric actuated clutch of the present invention; Figure 2 (A) is the inverse piezoelectric A perspective view of the piezoelectric ceramic resonator of the actuated clutch; Figure 2 (B) is a view of the AC power wiring of the piezoelectric ceramic resonator of the inverse piezoelectric actuated clutch; Figure 2 (A) is the inverse The operating principle of the Langevin piezoelectric vibrator of a piezoelectric actuated clutch corresponds to the radiation pressure field of a light hard-bottomed disc; Figure 3 (B) shows the corresponding Langevin piezoelectric vibrator of the inverse piezoelectric actuated clutch. The working principle of the radiation pressure field of a heavy hard disk; Figure 4 (A) shows the inverse Working diagram of the radiated pressure field of the piezo-actuated clutch by the piezo-electric vibrator equal to the unit weight of the hard-bottomed disc. The schematic diagram of the actuation pressure field of the Langevin piezoelectric vibrator that actuates the clutch is higher than the unit weight of the hard bottom disc; Figure 4 (C) is the Langevin piezoelectric of the inverse piezoelectric actuated clutch. The schematic diagram of the vibrator's radiation pressure field is lower than the unit weight of the hard bottom disc; Figure 5 (A) is the piezoelectric ceramic spectrum vibration of the inverse piezoelectric actuated clutch _ «___ _10_ This paper is thin-~ ~ --- ^ 629〇4 V. Description of the Invention (Λ) Λ7 B7 _ ^ 9 · ΡΒ91064c Instruction F.doc · 11/11 The working principle of the radiation pressure field corresponding to a light hard-bottomed disc · (Please read first Note on the back #Fill this page) Figure 5 (B) shows the working principle of the radiated pressure field of the piezoelectric ceramic resonator of the inverse piezoelectric actuated clutch corresponding to a heavy hard-bottomed disc. Figure 6 shows the inverse The five-use state diagram of the pre-tension adjusting device of the piezoelectric actuated clutch; and FIG. 7 is the reverse piezoelectric actuated clutch A schematic view of the positioning means and the driven member of the driving friction member. [Representative symbols of main parts] 2 Motor vehicle center 3 1 Circle center positioning device 41 Positioning groove 6 AC power supply 8 Langewen piezoelectric vibrator 82 Piezo ceramic 9 Piezo ceramic resonator 92 Metal back plate 11 Spring fixing plate 1 3 Preload adjustment device 15 Support body 1 Motor 3 Drive element 4 Driven friction member 5 Driven shaft 7 Power control switch 81 Cylindrical metal block 83 Threaded bracket 91 Silver electrode 10 Ball bearing 12 Spring 14 Linear bearing 16 Simple vibration 10 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs [Preferred Embodiment] Please refer to FIG. 6, which is a reverse piezoelectric actuated clutch provided by the present invention, which mainly includes a motor (1), a motor shaft (2), A driving element (3), a driven friction member (4), a driven shaft (5), an AC power source 15 (6), a power control switch (7), a ball bearing (10), a spring Fixed plate (1 1), a spring (12), a pre-tension adjustment -11-This paper is compliant with China National Standard (CNS) A4 specifications (2 丨 〇 > < 297 mm) --- 562904 A7 5 Description of the invention (丨 σ) Linear bearing (14) and a support ( 15) and other parts 10 15 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Kappa Consumer Cooperative, 20 devices (13). A motor (1) is used to provide a source of rotational power; a motor shaft (2) is a shaft connected to the power of the motor (1) and is fixedly connected to the driving element (3); a drive The element (3) is composed of a piezoelectric element and is fixed to the motor shaft (2). When the piezoelectric element has no external electric field, it will be engaged with the driven friction member. On the contrary, when the piezoelectric 7L element is subjected to an external electric field, the internal positive and negative charge centers of the piezoelectric element will be displaced, causing the piezoelectric element to shrink and deform. (Volume shrinkage and deformation), and the function of separation from the driven friction piece (4), a driven friction piece (4), is composed of a hard bottom disc, and is connected to the driven shaft (5), the The joint surface of the driven friction member (4) and the joint surface of the drive 1 element (3) remain tightly connected. Through the drive element (3): the piezoelectric element applies an external electric field to achieve separation; 丨The moving shaft (5), one end of which is connected to the driven friction piece (4), and the other end of which is fixed to the load end; the parent current power supply (6), which provides an AC power and passes the power control switch (7 ) To drive the piezoelectric ceramic resonator (9), so that the piezoelectric sheet or vibrator is deformed by the electrostrictive effect caused by the external electric field, which is the inverse piezoelectric effect; a power control switch (7) "| The input end of the power supply is connected to the AC power supply, and the output end Piezoelectric transducer or successive sheet; a ball bearing (10), within the bearing aperture of the driven shaft is pivoted to the line (5) from the outside is not the pre-position, and the outer diameter of the bearing system can accommodate the

(Please read the notes on the back before filling this page)

562904 Α7 Β7 V. Description of the invention (丨 丨 θ »Ιβ · ΓΌ9106 · ΐΕ said 叨 gT.tUn ^ The inner hole of the spring fixing plate (11) printed by the employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs; a spring fixing plate (11) Is a ring-shaped fixing plate, and the inner hole of the fixing plate can be put into a ball bearing (10); a spring (12) is installed on the spring fixing plate (11) and the preload adjusting device (13) ), By adjusting the pre-force adjustment device (13), the friction force of the joint surface between the driving element (3) and the driven friction member (4) can be adjusted; a pre-force adjustment device (13) is a External screw, a cylindrical body with a spiral groove on the outer circular surface, is installed in a preset internally threaded circular hole of the support (15), and is used to fine-tune the joint surface between the driving element and the driven friction member (4) Friction force; a linear bearing (14), the inner diameter of the bearing is pivotally set on the outer diameter of the driven shaft (5), and the outer diameter of the bearing can just fit into the inner hole of the support (15) A support body (1 5) is provided at the center of the circle with an inner hole that can be inserted into the outer bearing of the linear bearing (14), and a driven shaft (5) The outer diameter is inserted and fixed in the inner hole of the linear bearing (14), and the spring fixing plate can be increased or decreased by adjusting the symmetrical prestress adjustment device (13) provided on the support 15 (15). (11) and the distance between the pre-tension adjusting device (1 3), thereby directly adjusting the friction between the joint surface of the driving element (3) and the joint surface of the driven friction member (4); A) 'is a three-dimensional view of the Lan Jiewen piezoelectric vibrator (8) of the inverse piezoelectric actuated clutch provided by the present invention. The Jiewen piezoelectric vibrator (8) is a pair of polarization directions opposite to each other and back to back. The hollow piezoelectric ceramic (82) is connected. The pair of piezoelectric ceramics (82) are connected and placed in the middle of a pair of cylindrical metal blocks (81), and the piezoelectric ceramic (82) is threaded through a threaded bracket (83). And cylindrical metal blocks (81) solid ___ -13- This paper size applies to Chinese National Standards (CNS) Λ4 «Disturbance 5 10 20 (Please read the precautions on the back before filling this page), 1Τ! Ί | 562904 A7 B7 " "-'---- minutes) -1_9_PB91064c Saying that ".doe_ 14/14 V. Description of the invention (2) J fixed. Figure 1 (B), the text Lanjiewen piezoelectric vibrator provided by Ming (please read the precautions on the back before filling this page) (8) AC power wiring view. When an AC power is applied to the piezoelectric ceramic (82), it will cause piezoelectric The inverse piezoelectric effect of ceramic (82) 's force deformation, and the piezoelectric ceramic (82)' s force deformation meter has five basic forms such as thickness 5 deformation, length deformation, volume deformation, thickness shear and plane shear. However, not all crystals can produce a piezoelectric effect in these five states. The piezoelectric element materials can be divided into three types: piezoelectric single crystal, piezoelectric polycrystalline, and organic piezoelectric materials. Therefore, when the Lan Jiewen piezoelectric vibrator (8) is added to the AC power source 10 and the power frequency is close to the mechanical resonance frequency of the Lan Jiewen piezoelectric vibrator (8), it is on the surface of the cylindrical metal block (81). Harmonic Motion (16) and Near-Field Acoustic Levitation will be generated, and then the driven friction member (4) 15 will be floated by the effect of Radiation Pressure. efficacy. Figure 2 (A) is a perspective view of a piezoelectric ceramic resonator of an inverse piezoelectric actuated clutch provided by the present invention. The piezoelectric ceramic resonator is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (9). The silver electrode (91), the piezoelectric ceramic (82) and the metal back plate (92) are composed. Figure 2 (B) is a cross-current power supply wiring view of the inverse piezoelectric actuated clutch. When the piezoelectric ceramic (82) is connected to AC power, it will cause the piezoelectric ceramic (82) to deform and reverse the piezoelectric effect. . Therefore, after the piezoelectric ceramic resonator (9) is added to the AC power source, and the frequency of the power source is close to the mechanical resonance of the piezoelectric ceramic resonator (9)! At the frequency of i, and on the surface of the metal back plate (92), Generate mechanical resonance ____- 14- Applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) for the Zhang scale. '~' ______ B7_0919-PB91064c Instruction F.doc 15/15 Yes, description of the invention (I sub) " Harmonic Motion (Frequency Harmonic Motion) and Near-Field Acoustic Levitation (Near-Field Acoustic Levitation), and then use the effect of Radiation Pressure to make the driven friction member (4) float. efficacy. 5 Figure 3 (A) of the Langewen piezoelectric vibrator (8) corresponds to the working principle of the radiation pressure field of a light hard bottom disc. When the Langewen piezoelectric vibrator (8) is connected to an AC power source and the power frequency is close to At the mechanical resonance frequency of the piezoelectric ceramic vibrator (9), mechanical resonance and near-field acoustic wave effects (Near-Field 10 Acoustic Levitation) will be generated on the surface of the cylindrical metal block (81), and then the radiation pressure field will be used. (Radiation Pressure) Makes objects float. Corresponding to a specific radiation pressure field, when the unit weight of the hard bottom disc of the driven friction member (4) is light, the hard bottom disc can be "fully suspended" at a distance from the Langevin piezoelectric vibrator (8 At a specific height I5 on the end surface of the bracket, Figure 2 (B) shows that when the unit weight of the hard bottom disc is heavier, the hard bottom disc of the driven friction member (4) can be the worst point contact. Lan Jiewen's / On the end surface of the electric vibrator (8), the above-mentioned phenomenon of "full suspension" and touching can make the hard bottom disk of the driven friction member stand still or near a stationary state (the drive at this time) The element (3) still rotates with the motor shaft 20 center (2)). Figure 4 (A) is a schematic illustration of the work of the radiating pressure field of the hard bottom disk of the driven friction member (4) equal to the unit weight of the hard bottom disk. When the unit weight of the bottom disc is, the hard bottom disc is left standing and suspended at a distance from Lan Jiewen piezoelectric vibration n ^^ i- HJ · — i ^ i »i ml 111 fen ^ i tMmu i ^ m ϋ— ( (Please read the notes on the back before filling out this page), 11 562904

064〇 Instruction F.doe- V. Invention description (丨) 15 The Intellectual Property Bureau Employees' Cooperative Cooperatives of the Ministry of Economic Affairs printed 20 on the end surface of a child (8) at a certain height. Figure 4 (B) is a working schematic diagram of the radiation pressure field of the hard bottom disk of the driven friction member (4) higher than the unit weight of the hard bottom disk. The radiation pressure for the hard bottom disk is higher than that of the hard bottom disk. When the unit weight of the disc is raised, the hard bottom disc is lifted up to another specific height from the end surface of the Langevin piezoelectric vibrator (8). Figure 4 (C) is a working schematic diagram of the radiation pressure field of the hard bottom disc of the driven friction member (4) lower than the unit weight of the hard bottom disc. It is considered that the radiation pressure of the hard bottom disc is lower than the hard bottom disc. When the unit weight of the disc is lowered, the hard bottom disc is lowered down to another specific height from the end surface of the Langevin piezoelectric vibrator (8). In addition, Figure 2 (A) is a perspective view of a piezoelectric ceramic resonator (9). A piezoelectric ceramic resonator (9) is composed of a silver electrode (91), a piezoelectric ceramic (82), and a metal back plate. (92). In order to explain the working principle of the radiation pressure field of the piezoelectric ceramic resonator (9) more clearly, please refer to Figure 5 (A) and Figure 5 (B). This figure shows the structure of the piezoelectric ceramic resonator (9). The working principle of the radiation pressure field, after the piezoelectric ceramic resonator is added to the parent current power supply, and the power frequency is close to the mechanical resonance frequency of the piezoelectric ceramic resonator (9), the metal back plate of the piezoelectric ceramic resonator (9) On the surface of (92), a simple harmonic vibration (I. Harmonic Motion) and a near-field acoustic wave (Near Field Acoustic Levitation) effect will be generated on the surface. At this time, the principle of Radiation Pressure is used again. The object achieves the effect of floating. However, corresponding to a specific radiation pressure field from ^ IT (Please read the precautions on the back before filling this page}

I 562904 A7 B7 V. Description of the invention (丨 s) 0010 PB (W) 64o Description window F.doc 17H + · The unit weight of the hard-bottomed disc printed by the brake friction piece (4) of the employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is lighter In this case, the hard bottom disc can be "fully suspended" at a certain height from the end surface of the metal back plate (92) of the piezoelectric ceramic resonator (9); in addition, when the rigidity of the driven friction member (4) When the unit weight of the bottom disc is heavier, the hard bottom disc may be the worst point contact on the end surface of the metal back plate (92) of the piezoelectric ceramic resonator (9). The phenomenon of "point contact" can make the hard bottom disc of the driven friction member (4) stand still or near a stationary state (at this time, the driving element (3) is still rotating with the motor shaft (2)). When the motor (1) is running, the driving element (3) fixed on the motor shaft (2) is composed of a piezoelectric element, but the piezoelectric element is composed of: ① a piezoelectric ceramic containing a piezoelectric material The resonator (9) is composed of a piezoelectric vibrator containing a piezoelectric material. When the piezoelectric ceramic resonator (9) is not connected to an AC power source, the driving element (3) and the driven friction member (0) 15 are maintained in a connected state; when the piezoelectric ceramic resonator (9) is connected to an AC power source and the power frequency When the resonance frequency of the piezoelectric ceramic resonator (9) is close, the metal back plate (9-hook surface of the piezoelectric ceramic resonator (9) will generate mechanical resonance at the resonance frequency and produce near-field sound wave floating (Near-Field AC〇ustic Levitati〇n) effect, and then use the role of 20 radiation pressure field (RadlatiOn Pressure) to make the driven friction member (4) to achieve the effect of floating, so that the driven friction member (sentence by maintaining the state of engagement and then Separation, so that the driven shaft (5) can stop running. The aforementioned use of the radiation pressure field (Radiation Pressure) ------- -17- The paper size is applicable to the Chinese National Standard (CNS) public meal) _ : 5Ί: 10 ---------- ^-(Please read the notes on the back before filling out this page) Order 562904 A7 B7 V. Description of the invention (丨 t) 9Q10 PB 〇1 · 〇 Do n’t The description window F.doc _ 10/10 makes the driven friction member (4) achieve the effect of floating. The friction member (4) is composed of a hard bottom disc, but the driven friction member (4) may also be a Langewen piezoelectric vibrator (8) or a piezoelectric ceramic resonator (9). The driving element ( 3) The inverse piezoelectric actuated clutch 5 composed of the driven friction member (4) can be roughly divided into the form of a piezoelectric element and a hard bottom disc [the former is the driving element (3), and the latter is the driven friction member (4 )], Hard-bottomed discs and piezo elements, and piezo-element and piezo-type clutches. Please refer to Figure 6, which shows the pre-tensioning device 10 for the inverse piezoelectric actuated clutch (13 The use state diagram of) refers to the adjustment of the spring fixing plate by adjusting the symmetrical preload adjustment device (13) provided on the support (15) after the driving power of all the piezoelectric elements is turned off. The distance from the pre-tension adjusting device (13) also applies a pre-force to the driving element (3) and the driven friction member (4). When 15 driving elements (3) and the driven friction member (3) are to be added, 4) When the friction between them, the symmetrical pre-tension adjusting device (13) can be adjusted to reduce the spring fixing plate (11) and The distance between the force adjusting devices (13) is adjusted by using the outer diameter of the driven shaft (5) to closely fit the inner diameter of the ball bearing (10), and the outer diameter of the bearing is accommodated in a spring In the inner hole of the fixing plate (11), the spring (12) is arranged on the spring fixing plate (11), so that the rotation of the driven shaft (5) can be prevented, and the spring fixing plate (0) and the pre-tension adjusting device can be adjusted. The distance between (1 3) will move along the axis of the driven shaft (5). The most important is to use a linear bearing (丨 4) provided on the driven shaft (5). The linear bearing (14) The outer diameter is fixed into the support (15). -18-This paper size applies to China National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling this page) Printed by the Employees ’Cooperative of the Ministry of Intellectual Property Bureau 20 562904 V. Description of the invention (丨 ding) and 9 PB01064O instruction manual r.cfoo 10/10 When the distance is adjusted, the driven shaft ⑺ can not only rotate but be placed in a linear bearing (14 ) The driven shaft (5) of the inner hole can be used to implement the axial fine adjustment movement in the linear sleeve bearing order, so Friction between the joining surfaces (3) and driven friction members of the movable element ⑷ increases. Therefore, when the driven friction 5 pieces ⑷ and the load rotate with the motor shaft ⑺ of the motor ⑴, the driven shaft (5) can also have a relatively large torque output. On the other hand, the symmetrical pre-tension adjusting device (13) can be adjusted to increase the distance between the elastic plate fixing plate ⑴) and the pre-tension adjusting device (13), and the friction force between the driving element ⑺ and the driven friction member (4) It will be reduced. At this time, the driven motor (10 pieces) and the load still rotate with the motor shaft center of the motor (=), but the driven shaft (5) can only have a small torque output. In addition, FIG. 7 is a schematic diagram of the positioning device of the driving element (3) and the driven friction member (4) of the present invention. When the motor shaft (2) rotates, the piezoelectric element in the driving element (3) has no outside. When the electric field is applied, it is engaged with the driven friction member (4). When the piezoelectric element applies a current to the external electric field, the positive and negative charge centers inside the piezoelectric element will be displaced, resulting in the thickness of the piezoelectric element. Shrinkage deformation (volume shrinkage deformation), and separate from the driven friction member (4). The circle center positioning device (3 丨) provided on the driving element (3) in this way is a positioning device 20 protruding from the joint surface of the driving element. The circle center positioning device (31) is located on the driving element (3). When it is necessary to rotate with the driven friction element after the sentence is separated, the external electric field of the piezoelectric element in the driving element (3) is turned off, so the center positioning device (31) on the driving element (3) will be placed in the driven friction. (4) One of the joints is recessed downwards. Please read the note at the back before filling in this page.

562904 A7 B7 _____0010 PD010G1O Description F. Such as 〇 ·· ^ 〇 / 2θ V. The positioning groove (41) of the description of the invention (丨 δ), and the shape of the center positioning device (31) can fit into the positioning groove (41) in the groove, so that the driving element (3) and the driven friction member (4) will not be shifted when they are engaged, and the driving element (3) and the driven friction member (4) are also ensured. ) After connecting to each other, there will be no eccentric rotation and power reduction. [References] [1] E. Matsuo, K. Nakamura, S. Ueha and Y.

Hashimoto, "Holding characteristics of planar objects suspended by near-field acoustic 10 levitation," Ultrasonics, Vol. 38, 2000, pp. 60-63.

[2] S. Ueha, Y. Hashimoto and Y. Koike, “Non-contact transportation using near-field acoustic levitation,” Ultrasonics, Vol. 38, 2000, pp. 26-32.

[3] P.I. Ro, B.G. Loh and J. Santiago, “Holding 15 characteristics of planar objects suspended by near-field acoustic levitation,’ ’Ultrasonics, 2000, pp.60-66.

[4] S. Ueha, Y. Hashimoto and Y. Koike, '' Ultrasonic actuators using near field acoustic levitation, ’’ 20 IEEE Ultrasonics Symposium, pp. 661-666.

[5] KJ Hu5 K. Nakamura and S. Ueha, uAn analysis of a non-contact ultrasonic motor with an (Please read the notes on the back before filling out this page) -20- 562904 A7 B7 0919_PB91 0 $ 4g instruction manual / Section · V. Invention Description (丨 1) ultrasonically levitated rotor / 9 Ultrasonics, Vol. 35, 1997, pp.459-467. [6] JR Gao, CD · Cao and B. Wei, “Containerless processing of materials by acoustic levitation,” 5 Adv · Space Res. Vol · 24, No · 10, 1999, pp. 1293- Ί: 1297. [Features and Effects] The present invention Compared with the cited case and other conventional technologies, the provided reverse piezoelectric actuated clutch has the following 10 advantages. (1) The reverse piezoelectric actuated clutch of this creation is added to the AC power supply. When the frequency of the power source is close to the mechanical resonance frequency of the piezoelectric element, a mechanical resonance at a frequency of 15 will occur on the surface of the cylindrical metal block of the Langewen piezoelectric vibrator or the metal back plate of the piezoelectric ceramic resonator. Near field The effect of wave floating (Near_Fieid Acoustic Levitation), and then using the effect of radiation pressure field (Radiation Pressure) to make the driven friction member achieve the effect of floating, so that the driving element and the driven friction member from the state of maintaining engagement to the state of separation (2) The creation can adjust the distance between the spring fixing plate and the pre-tension adjusting device by adjusting the pre-force adjusting device provided on the support body, and at the same time, the driven friction member is adjusted. Apply a pre-force, and change the friction between the driving element and the driven friction member. When it is to be increased, the pre-force adjustment device can be adjusted to reduce the spring 20 21-

(Please read the precautions on the back before filling in this page) Binding-Thread 562904 V. Description of the invention (2C7) | The distance between the fixing plate and the pre-tension adjusting device, so as to increase the size of the pre-force 2 and increase the driving element and the The frictional force between the moving friction parts, therefore, the driven friction parts and the load accompany the axis of the motor: Turning 'and the driven shaft can also have a relatively large torque output; otherwise 5' when the driving element is reduced When the friction force between the driven friction member and the preload force is reduced, the distance between the impulse fixing plate and the preload adjustment device can be increased, thereby reducing the friction force between the driving element and the driven friction member. When the components and load can also rotate with the axis of the motor, 'the driven shaft can only produce a small 10 torque output. > The detailed description above is a specific description of one of the feasible embodiments of the present invention, but this embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or change without departing from the technical spirit of the present invention, for example: Equivalent embodiments of such changes shall be included in the scope of patent of this 15 case. In summary, this case is not only technically innovative, but also enhances the above-mentioned multiple effects over conventional items. It should have fully met the statutory invention patent requirements of novelty and progress, and submitted an application in accordance with the law. Your approval is requested. This application for an invention patent is designed to excite 20 people to the highest degree. -22 This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm)

Claims (1)

562904 A8 B8 C8 D8 6. Scope of patent application " O »t ^ PB91Q0HL ^ n;] ar.Uuc 1. 15 The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed a reverse piezoelectric actuated clutch, including: motor, system Those who provide a source of rotational power;-The 7C driving element is composed of a piezoelectric element and is fixed to the motor axis. When the piezoelectric element has no external electric field, the joint surface and driven friction of the driving element The engagement surfaces of the components are engaged, so that the driven friction member and the load will rotate with the shaft center of the motor, and the driven shaft will have a torque output;-the driven friction member is composed of a hard bottom disc, and The moving shafts are connected to each other; a Langewen piezoelectric vibrator is a pair of hollow piezoelectric ceramics with opposite polarization directions and back-to-back connection, then placed in the middle of a pair of cylindrical metal blocks and passing through the threaded bracket The piezoelectric ceramic and the cylindrical metal block are fixed; and the piezoelectric ceramic 5 white vibrator is composed of a silver electrode, a piezoelectric ceramic and a metal back plate. When a piezoelectric element is subjected to an external electric field, it will produce an inverse piezoelectric effect that causes the piezoelectric element to undergo force deformation. This piezoelectric element consists of: ① a piezoelectric ceramic resonator containing a piezoelectric material, ② a piezoelectric ceramic resonator containing a piezoelectric material The piezoelectric vibrator is composed of the vibration and near field of the mechanical resonance frequency on the surface of the metal skin when the piezoelectric element is connected to the AC power and the power frequency is close to the mechanical resonance frequency of the piezoelectric ceramic resonator. Acoustic floating effect (Near-Field Acoustic LevitatiorO, and then use the effect of Radiation Pressure (Radiation Pressure) to change from I- ^ ------ IT ------ (Please read the precautions on the back before filling out this Page) Wood paper scale is applicable to Chinese National Standard (CNS) A4 specification (210X297 mm) 562904 A8 B8 C8 D8 Patent application scope 2. 5 3 · 10 Employees ’cooperatives of the Intellectual Property Bureau of the Ministry of Economy ’s consumer cooperatives have printed brake friction parts to achieve the effect of floating, but the joint surface with the driven friction part 2 therefore 'the driven friction part and the load cannot be accompanied by the motor The center of the shaft rotates, and the output shaft will not have torque output. The reverse piezoelectric actuated clutch as described in the scope of application for patent! The arrangement of the driving element and the driven friction member can also be in the form of a hard-bottomed disc and a piezoelectric element _ '侠 〇 The hard bottom disc is a driving element, and the M electric element is a driven friction member. For example, the inverse piezoelectric actuated clutch according to item 1 of the scope of the patent application, wherein the arrangement form of the driving element and the driven friction member may also be a form in which the piezoelectric element and the piezoelectric element are joined, and the piezoelectric element is a The driving element, and the other piezoelectric element is a driven friction member. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)