201115886 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種混合型換能器（hybrid transducer)， 尤其是關於可供選擇多點共振驅動頻率之混合型換能器。 【先前技術】 物質受壓力（應力）而產生電流的現象稱為壓電效應 (Piezoelectric effect)’此乃利用能量轉換原理把機械能轉 • 變成電能的方法。 一 年A· Langevin利用石英晶體搭配鋼板組成一個 三明治型的轉換器（transducer),該轉換器可將電能轉換為 超θ波的機械震動，自此開啟壓電材料在聲波上的應用。 一般而s ’就混合型換能器之縱向振動壓電元件與扭 轉振動壓電元件找尋共同之共振頻率（res〇nance frequen'cy) 的過程就稱為：簡併(degeneracy)。然而，在目前的發展及 揭橥之混合型換能器所設計出的共振頻率通常僅有一組而201115886 VI. Description of the Invention: [Technical Field] The present invention relates to a hybrid transducer, and more particularly to a hybrid transducer that can select a multi-point resonant drive frequency. [Prior Art] A phenomenon in which a substance is subjected to a stress (stress) to generate a current is called a piezoelectric effect. This is a method of converting mechanical energy into electric energy by the principle of energy conversion. A year, A. Langevin used a quartz crystal with a steel plate to form a sandwich-type transducer, which converts electrical energy into mechanical vibration of the super-theta wave, which turns on the application of piezoelectric materials on sound waves. In general, the process of finding the common resonance frequency (resenerance frequen'cy) between the longitudinally vibrating piezoelectric element of the hybrid transducer and the torsional vibrational piezoelectric element is called degeneracy. However, the resonant frequencies designed in the current development and the hybrid transducers are usually only one set.
根據壓電理論建立定子振動分析模型的先前技術中， 研究定子的縱向振動與扭轉振動複合型超聲馬達的幾何结 構參數，驅動縱向振動與扭轉振動的共振頻率，如上所述二 通常只有一組，因此會侷限其應用。 【發明内容】 本發明之主要目的係在提供一種可選擇多個共振頻率 之換能器（hybrid transducer)。 201115886 、，本發明之另一主要目的係在提供選擇一種容易取得簡 併過程（deSeneraey process)之換能器，且更確保能獲得多組 共同使用之共振頻率。 為達成上述之目的，本發明提供一種混合型換能器s 其包括一轉子(r〇t〇r)與一定子（stator)，該定子包含一扭轉 電元件（torsional vibration piezoelectric device)、一 縱向振動壓電元件（1〇ngitudinal vibration piezoelectric 、—隔板及一樞軸(pivot)。隔板(template)介於縱向 ^壓電70件與扭轉振動壓電元件之間，藉此隔開縱向振 ^電元件與扭轉振動壓電元件。該樞軸串接轉子、扭轉 1動壓電讀、隔板及縱向振動壓電元件。較佳者，本發 :混合型換能器’進一步包含一中空螺鄉秦wb〇lt)， 螺栓係包覆樞軸之至少—部份，且中空螺栓串接扭 又"壓電元件、隔板及縱向振動壓電元件。 ^向振動壓電元件與扭轉振動㈣元件被驅動時， =縱向振動壓電元件之伸縮，移動檀軸以擠壓轉子，且 ^轉振動壓電元件產生轉動以驅動該轉子 者，該隔板實質是一圓片狀之金屬板。^ 在-實施财，該定子更包含—第—彈性狀以 間。本是位於轉子與扭轉振動壓電元件之 摩擦元=摩擦t:::以 卞疋值於第一彈性塊與轉子之間。 在另-實施例中，該定子更包含 =彈性塊位於隔板與縱向振動壓電丄= 例中’該定子更包含一第三彈性塊，該第三彈性 201115886 向振動壓電元件之另—端，且第二彈 長度實質相同。 乐一弹f生塊之 本發明之混合型換能器還可進一步包含一軸承 (be=g)、-彈簧（spHng)及—螺帽(nut)，該轴承位於轉子 與彈η之間，且彈簧位於轴承與螺帽之間。 、 【實施方式】 為能讓貴審查委員能更瞭解本發明之技 較佳具體實施例說明如下。 谷荷举 為了要提供扭轉振動壓電元件及縱向振動壓電 同的驅動頻率，本發明提出—種混合型換能器， 多個共振頻率。 ，、了選擇 請同時參考圖1之爆炸圖與圖2之剖面圖， 本發明之混合型換能器之實施例，圖^ 、"'、不 動壓電元件與一組扭轉振動壓電元 組縱向振動壓電元件與兩組扭轉振動壓電元件 局部剖面示意圖。因此本發明之縱向振動壓電 振動壓電元件並未限於圖示之結構，可依照所需、= ^大小’增減縱向振動壓電元件與扭轉振動壓電^件之數 混合型換能器包括一轉子丨與一定子2。 轉振動壓電元件21、一縱向振動壓電元件22 一 ^含一扭 一樞軸24。隔板23介於縱向振動壓電轉= 電元件22之間’藉此隔開縱向振動壓電元件2;=振動壓 壓電元件22。該樞軸24串接轉b、扭轉與扭1振動 201115886 隔板23及縱向振動Μ電元件22。當縱向振動壓電元件η與 扭轉振動壓電元件22被驅動時，隨著縱向振動壓電元件21 之伸縮，移動樞轴24以擠壓轉子1，且扭轉振動壓電元件21 產生轉動以驅動該轉子1之旋轉。較佳者，該隔板23實質是 一圓片狀之金屬板。 在一實施例中，該定子2更包含一第一彈性塊(elastk block)25，且第一彈性塊25是位於轉子〗與扭轉振動壓電元 件21之間。 在本實施例中，請參考圖1，本發明之混合型換能器進 一步包含一摩擦元件26，且該摩擦元件26是位於第一彈性 塊25與轉子1之間。 在另一實施例中，該定子2更包含一第二彈性塊27，且 該第一彈性塊27位於隔板23與縱向振動壓電元件22之間。 在本實施例中，該定子2更包含一第三彈性塊28，該第三彈 性塊28位於縱向振動壓電元件22之另一端，且第二彈性塊 27與第三彈性塊28之長度實質相同。較佳者，第一彈性塊 25、第二彈性塊27、第三彈性塊28皆為不鑛鋼材質。 較佳者，本發明之混合型換能器進一步包令—中空螺 栓(hollow bolt) 29，該中空螺栓29係包覆樞軸24之至少一部 伤’且中空螺栓24亦串接扭轉振動壓電元件21、隔板23及 縱向振動壓電元件22。 本發明之混合型換能器還可進一步包含一軸承 (bearing)3、一彈簧（Spring)4及一螺帽(nut)5，該軸承3位於 轉子1與彈簧4之間，且彈簧4位於軸承3與螺帽5之間。 201115886 依照圖2之實施例，也就是本發明使用兩組縱向振動壓 電元件21與兩組扭轉振動壓電元件22，且在縱向振動壓電 元件21與扭轉振動壓電元件22之間設有隔板23，利用 ANSYS實驗分析，第一彈性塊25、第二彈性塊27、第三 彈性塊28之長度分別為L2、LI、L1，可分別獲得之第一模 態、第二模態、第三模態之共振頻率如下表（一）、（二）、（三) 所示。 表（一）：第一模態 L1 (mm) 共振頻率 (Hz) L2 (mm) 共振頻率 (Hz) 8 44851 14 32930 9 41752 15 31764 10 39113 16 30663 11 36759 17 30131 12 34683 18 28948 13 32857 19 27817 14 31234 20 26942 15 29712 21 26110 16 28368 22 25324 17 27142 23 24579 18 26012 24 23874 19 24981 25 23204 20 24028 26 22568 21 23141 27 21966 22 22324 28 21391 23 21562 29 20847 25 20187 30 20325 26 19561 31 19830 27 19011 32 19356 28 18423 33 18905 29 17903 34 18472 30 17518 35 18060 31 17201 36 17664 201115886 表（二）：第二模態 L1 (mm) 共振頻率 (Hz) L2 (mm) 共振頻率 (Hz) 8 N/A 14 81805 9 N/A 15 79006 10 N/A 16 76002 11 N/A 17 73744 12 N/A 18 71677 13 N/A 19 69778 14 80735 20 68007 15 79587 21 66354 16 77953 22 64811 17 76509 23 63350 18 74691 24 61972 19 72606 25 60656 20 70385 26 59399 21 68215 27 58197 22 66015 28 57093 23 63935 29 55936 25 61951 30 54944 26 60052 31 53831 27 58252 32 52833 28 56580 33 51865 29 53397 34 50991 30 51248 35 50021 31 49735 36 49139 表（三）：第三模態 LI (mm) 共振頻率 (Hz) L2 (mm) 共振頻率 (Hz) 9 N/A 14 149322 10 N/A 15 143454 11 N/A 16 137813 12 N/A 17 132476 13 N/A 18 127465 14 N/A 19 122758 201115886 li Τό Ί7According to the prior art of establishing a stator vibration analysis model based on piezoelectric theory, the geometrical parameters of the longitudinal vibration of the stator and the torsional vibration combined ultrasonic motor are studied, and the resonant frequencies of the longitudinal vibration and the torsional vibration are driven, as described above, usually only one set, Therefore, its application will be limited. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a hybrid transducer that can select a plurality of resonant frequencies. Another major object of the present invention is to provide a transducer that is easy to obtain a deSeneraey process, and to ensure that multiple sets of resonant frequencies used in common are obtained. In order to achieve the above object, the present invention provides a hybrid transducer s comprising a rotor (r〇t〇r) and a stator, the stator comprising a torsional vibration piezoelectric device, a longitudinal direction Vibrating piezoelectric element (1〇ngitudinal vibration piezoelectric, - spacer and a pivot). The template is interposed between the longitudinal piezoelectric element 70 and the torsional vibration piezoelectric element, thereby separating the longitudinal vibration ^Electrical component and torsional vibration piezoelectric element. The pivot is connected in series with a rotor, a torsion 1 piezoelectric reading, a diaphragm and a longitudinally vibrating piezoelectric element. Preferably, the present invention: the hybrid transducer further comprises a hollow螺乡秦wb〇lt), the bolts cover at least part of the pivot, and the hollow bolts are twisted and twisted "piezoelectric elements, spacers and longitudinally vibrating piezoelectric elements. ^ When the vibrating piezoelectric element and the torsional vibration (four) element are driven, = longitudinally vibrating the expansion and contraction of the piezoelectric element, moving the sandal shaft to squeeze the rotor, and rotating the piezoelectric element to rotate to drive the rotor, the spacer The essence is a round sheet metal plate. ^ In the implementation of the money, the stator further contains - the first - elastic shape. This is the friction element of the rotor and the torsional vibration piezoelectric element = friction t::: 卞疋 between the first elastic block and the rotor. In another embodiment, the stator further comprises: the elastic block is located in the spacer and the longitudinal vibration piezoelectric 丄 = in the example, the stator further comprises a third elastic block, and the third elastic 201115886 is further to the vibrating piezoelectric element. End, and the second bullet length is substantially the same. The hybrid transducer of the present invention may further comprise a bearing (be=g), a spring (spHng) and a nut, the bearing being located between the rotor and the spring η. And the spring is located between the bearing and the nut. [Embodiment] In order to enable the reviewing committee to better understand the technology of the present invention, a preferred embodiment will be described below. In order to provide a torsional vibration piezoelectric element and a longitudinal vibration piezoelectric drive frequency, the present invention proposes a hybrid transducer having a plurality of resonance frequencies. Referring to the exploded view of FIG. 1 and the cross-sectional view of FIG. 2, the embodiment of the hybrid transducer of the present invention, FIG. 2, "', the stationary piezoelectric element and a set of torsional vibration piezoelectric elements A partial cross-sectional view of a group of longitudinally vibrating piezoelectric elements and two sets of torsional vibration piezoelectric elements. Therefore, the longitudinally vibrating piezoelectric vibrating piezoelectric element of the present invention is not limited to the illustrated structure, and the number of hybrid vibrators of the longitudinal vibrating piezoelectric element and the torsional vibration piezoelectric element can be increased or decreased according to the required size. Includes a rotor and a stator 2. The vibrating piezoelectric element 21 and the longitudinal vibrating piezoelectric element 22 include a twisting pivot shaft 24. The spacer 23 is interposed between the longitudinal vibration piezoelectric transducer = the electrical component 22, whereby the piezoelectric element 2 is longitudinally vibrated; the piezoelectric element 22 is vibrated. The pivot 24 is connected in series with b, torsion and torsion 1 vibration 201115886 baffle 23 and longitudinally vibrating electric component 22. When the longitudinally vibrating piezoelectric element η and the torsional vibration piezoelectric element 22 are driven, as the longitudinal vibration of the piezoelectric element 21 expands and contracts, the pivot 24 is moved to press the rotor 1, and the torsional vibration piezoelectric element 21 is rotated to drive The rotation of the rotor 1. Preferably, the partition 23 is substantially a disc-shaped metal plate. In one embodiment, the stator 2 further includes a first elastk block 25, and the first elastic block 25 is located between the rotor and the torsional vibration piezoelectric element 21. In the present embodiment, referring to Fig. 1, the hybrid transducer of the present invention further includes a friction member 26, and the friction member 26 is located between the first elastic block 25 and the rotor 1. In another embodiment, the stator 2 further includes a second elastic block 27, and the first elastic block 27 is located between the partition 23 and the longitudinally vibrating piezoelectric element 22. In this embodiment, the stator 2 further includes a third elastic block 28 located at the other end of the longitudinally vibrating piezoelectric element 22, and the length of the second elastic block 27 and the third elastic block 28 is substantially the same. Preferably, the first elastic block 25, the second elastic block 27, and the third elastic block 28 are made of non-mineral steel. Preferably, the hybrid transducer of the present invention further includes a hollow bolt 29 that covers at least one of the pivots 24 and the hollow bolts 24 are also connected in series with torsional vibration pressure. The electrical component 21, the spacer 23, and the longitudinally vibrating piezoelectric element 22. The hybrid transducer of the present invention may further comprise a bearing 3, a spring 4 and a nut 5, the bearing 3 being located between the rotor 1 and the spring 4, and the spring 4 is located Between the bearing 3 and the nut 5. 201115886 According to the embodiment of FIG. 2, that is, the present invention uses two sets of longitudinally vibrating piezoelectric elements 21 and two sets of torsional vibration piezoelectric elements 22, and is provided between the longitudinal vibrating piezoelectric element 21 and the torsional vibration piezoelectric element 22. The separator 23 is analyzed by ANSYS, and the lengths of the first elastic block 25, the second elastic block 27, and the third elastic block 28 are respectively L2, LI, and L1, and the first mode and the second mode can be respectively obtained. The resonance frequency of the third mode is shown in Tables (1), (2), and (3) below. Table (1): First mode L1 (mm) Resonance frequency (Hz) L2 (mm) Resonance frequency (Hz) 8 44851 14 32930 9 41752 15 31764 10 39113 16 30663 11 36759 17 30131 12 34683 18 28948 13 32857 19 27817 14 31234 20 26942 15 29712 21 26110 16 28368 22 25324 17 27142 23 24579 18 26012 24 23874 19 24981 25 23204 20 24028 26 22568 21 23141 27 21966 22 22324 28 21391 23 21562 29 20847 25 20187 30 20325 26 19561 31 19830 27 19011 32 19356 28 18423 33 18905 29 17903 34 18472 30 17518 35 18060 31 17201 36 17664 201115886 Table (2): Second mode L1 (mm) Resonance frequency (Hz) L2 (mm) Resonance frequency (Hz) 8 N/ A 14 81805 9 N/A 15 79006 10 N/A 16 76002 11 N/A 17 73744 12 N/A 18 71677 13 N/A 19 69778 14 80735 20 68007 15 79587 21 66354 16 77953 22 64811 17 76509 23 63350 18 74 。 。 。 。 。 。 。 。 。 。 。 35 50021 31 49735 36 49139 Table (3): Third mode LI (mm) Resonance frequency (Hz) L2 (mm) Resonance frequency (Hz) 9 N/A 14 149322 10 N/A 15 143454 11 N/A 16 137813 12 N/A 17 132476 13 N/A 18 127465 14 N/A 19 122758 201115886 li Τό Ί7
H T9 20 n 22 23 24 25 26 27H T9 20 n 22 23 24 25 26 27
H 29 30 31H 29 30 31
請參考圖3A，其顯示上表共振頻率與彈性線長度之間 的關係圖。簡併區間（degeneracy range)是約從17 而L1長度是約在13〜29 mm之間，L2長度是約在Μ與％ mm 之間，因此明顯有多組共振頻率可供選擇。同樣地’請參 考圖3B，簡併區間是約從54〜76kHz，而L1長度是約在14〜31 mm之間’ L2長度是約在IS與36mm之間。以及圖3C，簡併 區間是約從141〜l49kHz，而L1長度是約在29〜31 mm之間， L2長度是約在μ與i6mm之間，因此證明在各種操作 (低頻或高頻）範圍明顯有多組共振頻率可供選擇' 此外’當若縱向振動壓電元件縮短時，不再接觸轉 扭轉振動廢電元件返回原位，此時無轉動，因此將縱^ ’ 動壓電元件與扭轉振動壓電元件以90。相位差設、：振 得最大輸出值。 叹s，則可獲 201115886 L 14111111及£2為16咖為例s利用ANSYS實驗分 月之混合型換能器之第-模態，其縱向振動的 來顯=顯不如圖4八所示5其扭轉振動的模型分析圖 y ' ^ 4B所不。同樣地以L1 = 14mn^L^15mm為 S二ί態，其縱向及扭轉振動的模型分析圖形分別顯 ^ 5Β’以及以L1 =3〇mm及L2為14mm為例之第三 〜、，其縱向及扭轉振動的模型分析圖形分別顯示如圖6A 及6B °另圖7為使用阻抗分析儀實際量測LI = 14mm及L2 為15mm為例之頻率（77 65kHz)，與ANSYS分析計算之值（約 79kHz)相近上_由以上數據及圖形顯示，本發明之結構可提 供多組的共振頻率之選擇，因此使得簡併過程(degeneracy process)更為容易。 綜上所陳，本發明無論就目的、手段及功效，在在均 顯示其迥異於習知技術之特徵，懇請貴審查委員明察， 早曰賜准專利，俾嘉惠社會，實感德便。惟應注意的是， 上述諸多實施例僅係為了便於說明而舉例而已，本發明所 主張之權利範圍自應以申請專利範圍所述為準，而非僅限 於上述實施例。 【圖式簡單說明】 圖1係本發明之混合型換能器之一實施例’其顯示爆炸圖。 圓2係本發明之混合型換能器之另一實施例，其顯示剖面 圖。 圖3A-3C係依攄圖2之實施例之不同模態，顯示本發明之彈 性塊長度與共振頻率之間的關係圖。 201115886 圖4A-4B係依據圖3A之第一模態，其分別顯示縱向與扭轉 振動的模型分析圖形。 圖5A-5B係依據圖3B之第二模態，其分別顯示縱向與扭轉 振動的模型分析圖形。 圖6A-6B係依據圖3C之第三模態，其分別顯示縱向與扭轉 振動的模型分析圖形。 圖7為使用阻抗分析儀實際量測LI = 14mm及L2為15mm為 例之頻率，與ANSYS分析計算之值。 【主要元件符號說明】 定子2 縱向振動壓電元件22 樞軸24 摩擦元件26 第三彈性塊28 轴承3 螺帽5 轉子1 扭轉振動壓電元件21 隔板23 第一彈性塊25 第二彈性塊27 中空螺栓29 彈簧4Please refer to Fig. 3A, which shows a relationship between the resonance frequency of the above table and the length of the elastic line. The degeneracy range is about 17 and the L1 length is between about 13 and 29 mm. The length of L2 is between about Μ and % mm, so there are obviously multiple sets of resonant frequencies to choose from. Similarly, please refer to Fig. 3B, where the degenerate interval is from about 54 to 76 kHz, and the length of L1 is between about 14 and 31 mm. The length of L2 is between about IS and 36 mm. And Figure 3C, the degenerate interval is about 141~l49kHz, and the length of L1 is about 29~31mm, and the length of L2 is about between μ and i6mm, so it is proved in various operations (low frequency or high frequency). Obviously there are multiple sets of resonance frequencies to choose from. 'When', if the longitudinal vibration of the piezoelectric element is shortened, the contact with the torsional vibration waste electric component is no longer returned to the original position, and there is no rotation at this time, so the vertical piezoelectric element is Tors the vibrating piezoelectric element at 90. Phase difference setting: The maximum output value is oscillated. Sigh s, you can get 201115886 L 14111111 and £2 for 16 coffee as an example. Using the ANSYS experiment, the first mode of the hybrid transducer, the longitudinal vibration of the display = not shown in Figure 4 The model analysis of its torsional vibration is not shown in Fig. y '^4B. Similarly, L1 = 14mn^L^15mm is the S bis state, and the model analysis graphs of the longitudinal and torsional vibrations are respectively displayed as 5 Β ' and L1 = 3 〇 mm and L2 is 14 mm as an example. The model analysis graphs of longitudinal and torsional vibrations are shown in Figures 6A and 6B respectively. Figure 7 shows the actual measurement of LI = 14mm and L2 of 15mm (77 65kHz) using impedance analyzer, and the value calculated by ANSYS ( Approximately 79 kHz). As indicated by the above data and graphs, the structure of the present invention provides a choice of multiple sets of resonant frequencies, thus making the degeneracy process easier. To sum up, the present invention, regardless of its purpose, means and efficacy, shows its distinctive features of the prior art. You are requested to review the examinations and grant the patents as soon as possible. It is to be noted that the various embodiments described above are intended to be illustrative only, and the scope of the invention is intended to be limited by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded view showing an embodiment of a hybrid transducer of the present invention. Circle 2 is another embodiment of the hybrid transducer of the present invention, which shows a cross-sectional view. Figures 3A-3C are graphs showing the relationship between the length of the elastic block of the present invention and the resonant frequency, depending on the different modes of the embodiment of Figure 2. 201115886 Figures 4A-4B are based on the first mode of Figure 3A, which respectively shows a model analysis pattern of longitudinal and torsional vibrations. Figures 5A-5B are diagrams showing the model analysis of longitudinal and torsional vibrations, respectively, in accordance with the second mode of Figure 3B. Figures 6A-6B are diagrams showing a model analysis of longitudinal and torsional vibrations, respectively, in accordance with the third mode of Figure 3C. Figure 7 shows the frequency of the actual measurement of LI = 14mm and L2 of 15mm using an impedance analyzer, and the value calculated by ANSYS. [Main component symbol description] Stator 2 Longitudinal vibration piezoelectric element 22 Pivot 24 Friction element 26 Third elastic block 28 Bearing 3 Nut 5 Rotor 1 Torsional vibration Piezoelectric element 21 Separator 23 First elastic block 25 Second elastic block 27 hollow bolt 29 spring 4