Abstract
The variable-lead spiral pair changes the moving speed by the change of lead, which can improve structural stability. The structure has the zero self-locking property due to the change of the lead. Firstly, this paper analyses the whole structure, and then studies the contact problem of the variable-lead spiral pair, including the roller rotation problem and the analysis of friction and wear, finally analyses the structural stress. Through the analysis, the damage type of the structure and the structural stress which meets the allowable stress of the material can be obtained. Then it verifies the structure is reasonable.
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