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標題: | 福祉座椅升降機構之設計與分析 Design and Analysis of a Lifting Seat Mechanism for Disabled Person |
作者: | Wei-Chang Chung 鐘尉彰 |
指導教授: | 鍾添東(Tien-Tung Chung) |
關鍵字: | 座椅升降機構,機構合成,參數化設計,有限元素方法,最佳化設計, seat lifts mechanism,mechanism synthesis,parametric design,finite element method,optimum design, |
出版年 : | 2007 |
學位: | 碩士 |
摘要: | 福祉座椅升降機構之設計與分析
摘要 基於人的心理因素,行動不便人士必然會希望能夠獨立完成上下車動作而不需要他人協助,故本文發展一套小汽車座椅升降機構,用以提供行動不便人士能夠自行進出車輛。首先利用機構合成理論提出升降機構之配置設計,平行連桿機構用以保持座椅位置水平,並且曲柄滑塊機構可使座椅產生升降動作,馬達傳遞動力給導螺桿並且趨動曲柄滑塊機構,藉由導螺桿轉動結果可使滑塊線性移動與曲柄連桿轉動,達成座椅升降運動,平行連桿控制座椅位置水平,確保座椅在升降過程中之穩定運轉。接續發展參數化設計程式,可自動產生升降機構之實體模型,並可產生動畫用以檢驗各個組成元件在升降運動過程中之相關動作與干涉情形,為確保結構安全性,應用有限元素方法分析在不同臨界位置下之強度與剛性,並且應用結構最佳化方法進行座椅之輕量化設計。最後完成升降機構之初型製作與量測,從量測結果得知本文發展之升降機構可以成功應用於小汽車上並且幫助行動不便人士進出車輛。 關鍵字:座椅升降機構、機構合成、參數化設計、有限元素方法、最佳化設計 Design and Analysis of a Lifting Seat Mechanism for Disabled Person Abstract Based on the psychology of the human, the disabled people are always hoping that they can enter/exit the car by themselves without assistance of other people. This thesis developed a seat lift mechanism for the disabled in small cars. First, a configuration design of the seat lift is proposed based on the mechanism synthesis theory. Parallelogram linkages are used to maintain the horizontal position of the seat, and crank-slider mechanisms are used to lift/down the seat. Crank-slider mechanisms are driven by a ball-screw which is powered by a motor. The rotation of the ball screw results in linear motion of the slider and rotation motion of crank linkages, which causes the seat in up/down motion. Through the horizontal position controlled by parallelogram linkages, the stability of the seat is ensured during the lift/down operations. Then, a parametric design program is developed for automatically generating the solid model of the lift mechanism, and the motion pictures are generated to check the relationships and interferences of all components during the up/down motions. In order to ensure the structural safety, the strength and rigidity of the critical components are also analyzed by finite element method in several motion positions. Structural optimization method was also applied to improve strength of the seat and also to minimize the mass of the seat. Finally, the prototype of the lift mechanism is manufactured, and the performances of the lift mechanism are measured. From the measured result, it shows that the lift mechanism developed in this thesis can be applied successfully to small cars and can be used for helping the disabled entering/exiting the car. Keywords: seat lifts mechanism, mechanism synthesis, parametric design, finite element method, optimum design |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28751 |
全文授權: | 有償授權 |
顯示於系所單位: | 機械工程學系 |
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