A constant torque compliant mechanism generates an output torque that keeps invariant in a large range of input rotation. Because of the constant torque feature and the merits of compliant mechanisms, they are used in automobile, aerospace, medical, healthcare, timing, gardening and other devices. A common problem in the current constant torque compliant mechanisms is their pre-loading range that is a certain starting range of the input rotation. In the pre-loading range, the output torque of constant torque compliant mechanisms does not have the desired constant torque. It increases from zero to a value. The pre-loading range usually accounts for one-third of the entire input rotation range, which severally weakens the performance of the mechanisms. In this thesis, the pre-loading problem is eradicated by using precompressed beams in constant torque compliant mechanisms. It is challenging to synthesize constant torque compliant mechanisms composed of precompressed beams because of the integrated force, torque and deflection characteristics. The synthesis of the mechanisms is systemized as parameter optimization of the composed precompressed beams. The presented synthesis method is demonstrated by synthesizing constant torque compliant mechanisms with different numbers of precompressed beams and validated by experimental results.


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    Title :

    Synthesis of constant torque compliant mechanisms by using precompressed beams


    Contributors:

    Type of media :

    Miscellaneous


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :

    DDC:    629




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