关键词: 中央扶手；力学分析；计算模型；摩擦力矩

Abstract: This paper focuses on the central armrest with friction hinge, the working principle of the armrest system is described and the mechanical analysis is carried out to obtain the calculation model of armrest operation force. Based on the performance index of armrest (opening force), parametric driving forward design is carried out to obtain the hinge friction torque and armrest closing force so as to guide the hinge design of suppliers. At the same time, the influence of friction torque, armrest mass and operation force arm on the maximum opening force and closing force of armrest is found. Both the maximum opening force and the maximum closing force increase linearly with the increase of friction torque, and there is a constant difference between them at any friction torque; Both of them increase linearly with the increase of armrest mass, but the influence of armrest mass on the maximum opening force is greater than that on the maximum closing force; Both of them decrease with the increase of the operating force arm, but they are nonlinear, and the larger the operating force arm, the smaller the influence of its change on the maximum opening and closing forces. It provides reference and solution for the design of central armrest project with friction hinge.

Key words: Central armrest; Mechanical analysis; Calculation model; Friction torque