完整后设资料纪录
DC 栏位语言
dc.contributor.author陈信志en_US
dc.contributor.authorShing-Zi Chenen_US
dc.contributor.author徐文祥en_US
dc.contributor.authorWen-Syang Hsuen_US
dc.date.accessioned2014-12-12T02:21:24Z-
dc.date.available2014-12-12T02:21:24Z-
dc.date.issued1998en_US
dc.identifier.urihttp://140.113.39.130/cdrfb3/record/nctu/#NT870489033en_US
dc.identifier.urihttp://hdl.handle.net/11536/64709-
dc.description.abstract后变速器是一变速自行车变速系统中重要的零组件之一。由过去相关研究中,已知平面后变速器中B、P弹簧之弹性系数值大小对导轮定位及对炼条张力大小有直接的影响。
在本论文中,根据所模拟出平面后变速器之B、P弹簧之弹性系数变化对导轮定位的影响,在给定平面后变速器P弹簧不同弹性系数值的情况下,作一实验与理论的比较。以及利用一设计装置,在变速系统定转速下,测得紧边链条的张力变化情形。证实当P弹簧弹性系数较小时,能使导链导轮与较大齿盘的间距与在较大P弹簧弹性系数时的导链导轮与较小齿盘的间距相等。紧边链条张力的变化则与模拟结果有些许不同,而这些不同可经由不同的环境设定加以解释。
在此我们提出三种弹性系数可变机构,其特点是在扭转角度增大时,其弹性系数可调小。并从制造及分析上比较其优劣点,以决定其中一个较佳的设计,并针对此机构,制作一原型件进行测试,与分析结果比较及讨论。此弹簧可变机构除了可应用于变速器上外,亦可应用于需要弹簧弹性系数随作动行程增加而变小之机构中。
zh_TW
dc.description.abstractThe rear derailleur is one of the key components in the derailed system of the multi-speed bicycle. In the past researches, it was found that the values of the B-spring stiffness and P-spring stiffness affect the tension of the chain and the positions of the guide pulley directly.
According to the influence of the B-spring and P-spring stiffness, different P-springs are set to experiment and compare with the simulated results. The smaller P-spring stiffness can keep the distance between the guide pulley and the bigger freewheel with the distance between the guide pulley and the smaller freewheel in the bigger P-spring stiffness equally. The tight-side tension forces of the chain in each speed-rate are also measured in the constant rotation velocity by the designed equipment. The experimental results of the tight-side tension are different from the simulated results. However, these differences can be explained by different environment setting.
Three variable stiffness mechanisms are proposed. The characters of them make the mechanism stiffness with lowering variable when the torsion angle is larger. The advantage and the disadvantage are compared from manufacture and analysis to decide a better design. And then aim to such mechanism, the prototype of this spring mechanism will be manufactured to test, analyze, and discuss. The spring mechanisms are not only applied in the planar rear derailleur, but also applied in any mechanical engineering design that want to make the spring stiffness with lowering variable.
en_US
dc.language.isoen_USen_US
dc.subject弹性系数可变机构zh_TW
dc.subject螺旋弹簧zh_TW
dc.subject后变速器zh_TW
dc.subjectVARIABLE STIFFNESS MECHANISMen_US
dc.subjectHELICAL SPRINGen_US
dc.subjectREAR DERAILLEURen_US
dc.title弹簧弹性系数可变机构之设计在自行车后变速器之应用zh_TW
dc.titleDEVELOPMENT OF A VARIABLE STIFFNESS MECHANISM IN THE REAR DERAILLEURen_US
dc.typeThesisen_US
dc.contributor.department机械工程学系zh_TW
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