新型电脑刺绣机挑线机构设计分析

Analysis and design of new model thread-taking-up mechanism of the computerized embroidery machine

电脑刺绣机针杆机构和挑线机构是形成刺绣轨迹的重要机构,对形成高质量的刺绣轨迹十分重要。以电脑刺绣机原始挑线机构为研究对象,在保持挑线规律不变的基础上,设计了平底推杆盘形凸轮挑线机构,推导了设计理论方程,确定了凸轮的轮廓曲线,研制了新型电脑刺绣机挑线机构,在电脑刺绣机上进行了装机实验,实验结果表明新型电脑刺绣机挑线机构具有良好的挑线功能。

The needle bar and the thread-taking-up are main mechanism to form the thread trace of the embroidery in computerized embroidery machine, exerting great impact on the forming of high quality thread trace of the embroidery. This paper deals with the study of the original thread-taking-up mechanism and sets out a new design of periphery cam with flat-bottomed pusher style thread-taking-up mechanism while maintaining the movement regularity of the original thread-taking-up mechanism. It deduces the theoretic design equation, gets the contour curve of the periphery cam, and manufactures the new-model thread-takingup mechanism for computerized embroidery machine. Experiments of the new mechanism prove that it possesses excellent working performance.