輪椅自動調節腳架之設計與分析

Design and Analysis of an Automatic Adjustable wheelchair footrest

陳國桂(Guo-Gui Chen)

指導教授 ： 徐正會 ； 蔡希杰

國立臺北科技大學/機電學院/機電整合研究所/碩士(2008年)

摘要

根據本研究內搜集之文獻回顧，發現大部分傳統輪椅腳架因為只有一個固定樞軸的關係，當使用者要將腳抬起做伸展時，膝蓋與腳架的轉軸在不同位置，而腳架伸到與地面平行時腳架並不會隨著伸長，而腳會受到踏板的一個推力使得膝蓋稍微彎曲，並會對輪椅使用者感到不舒適且不符合人體工學，而由此構想，其在作動機構方面，利用機構運動合成之方法，設計具有一個自由度之四連桿組，可隨著腳架上升使得腳可得到更舒適的延伸，不會受到踏板的推力，也比較不會使膝蓋受傷，更貼近輪椅使用者的需求。
本研究利用機構合成之方法，經過設計需求的設立，找出最合適之四連桿機構，並藉由SolidWorks 2007 SP0.0電腦輔助設計軟體，進行輪椅自動調節腳架作動機構之尺寸合成，建立其3D Model，再利用COSMOSWorks Designer之模擬軟體進行應力、應變及位移之分析，以確定所設計輪椅之強度，再應用SolidWorks Animator指令之模擬功能，對所設計之輪椅自動調節腳架進行動態模擬，確認輪椅於作動過程中無干涉情形發生，使創新設計之輪椅自動調節腳架得到驗證，故本研究所設計之輪椅自動調節腳架是單一自由度作動，操作簡便、且符合人體工學等特性，適用於年長及行動不便者，是理想的輪椅輔具。

關鍵字

輪椅自動調節腳架 ； 人體工學 ； 四連桿機構

並列摘要

This research deals with the design of the mechanisms of a wheelchair footrest. According to the related references of this research, most of wheelchair footrest only have a fixed pivot when users want to stretch their legs, the axles of the knees and footrest are not in the different positions, and when footrest and ground are parallel, footrest didnt stretch, and the legs will get a bearing to make the knees a little bend and it will make the users feel uncomfortable and didnt accord with ergonomics. The design of the wheelchair footrest is four-bar linkage which has one degree of freedom mechanism. The mechanism is used motion generator for three-positon motion synthesis. The moves process of the footrest which make the user obtain comfortable extending and carry.
In addition, by using the Solid Works 2007 SP0.0 to build up the 3D model and simulate the movements, and implement COSMOSWorks Designer to analyze stress, strain and displacement, so as to confirm the strength of the wheelchair footrest structure. So the automatic adjustable wheelchair footrest by the one degree of freedom, and its lightweight and easy to use. Its the ideal auxiliary apparatus of wheelchair, and suitable for geriatric or defective.

並列關鍵字

4-bar ； Wheelchair Footrest ； Automatic-Adjustable

參考文獻

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[5] Michael N. Kozicki, 1995, “WHEELCHAIR FOR CONTROLLED ENVIRONMENTS,” U.S. 5542690 B1.

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[22] Wilhelm Meyer Jun, 1977, “INVALID WHEEL-CHAIR,” U.S. 4,033,624.

[25] Thomas E. Finch, 2003, “DETACHABLE WHEELCHAIR LEG REST,” U.S. 6,543,854 B1.