| Summary: | 碩士 === 國立臺北科技大學 === 製造科技研究所 === 106 === In the notebook pivot mechanism, there is a disc spring and a cam mechanism, wherein the force generated by the disc spring can support the concave cam follower, and the mechanism can be concave between the elastic force of the disc spring and the concave cam The slot has a fixed effect on the pen panel. The disc springs of different outer diameters and plate thicknesses also have different elastic forces, thus affecting the fixing strength.
The main research direction of this thesis is to design the torque formula of the pen electric pivot mechanism, use the various types of disc springs to verify the feasibility of the torque formula, and establish a set of torsion empirical formula system. In this study, the disc spring of diameter 6mm is tested for the thickness of the disc spring according to its thickness. The spring constant of each type of disc spring is tested by the MTS test machine, which is convenient for the design of the torsion formula. Because the pivot mechanism is in the process of designing the torque formula. It is too complicated, so the four disc springs are arranged in series and mounted on the pivot. The torque indicator is used to test the pivot torque. The torque test of the pivotless cam and the concave cam are respectively performed. The result is based on the relationship between the torque and the displacement and the curve is compared to the error. Finally, using the experimental data of each type of disc spring, a set of torsion empirical formula system can be established, which can be applied to the selection of disc spring elements inside the pen electric pivot mechanism.
The data obtained in this study will be input with the disc spring parameters of each model, the number of contact surfaces and the displacement. According to the load of the pen armature design, please refer to this paper to study the torsion empirical formula system to quickly find the appropriate one. Disc spring type for precise selection and strength safety.
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