关键词: 家用电器, 悬停系统, 数学建模, 试验研究, 摩擦力

Abstract: To address the issue of door non-hovering during mass production caused by significant fluctuations in door weight and insufficient hinge spring force, a mathematical modeling and experimental study were conducted on the hinge suspension system of a household appliance door. First, the relationship between spring deformation and door opening angle was analyzed using mechanism kinematics. Then, through mechanical analysis, a formula for calculating the spring force was derived, with consideration given to the effects of friction and spring force degradation. The door mass and center of gravity were calculated using CREO software, and a method for measuring and calculating the friction force was proposed. Finally, experimental studies were carried out to investigate the degradation pattern of the spring force over time. The results indicate that the spring force is governed by the friction at the hinge sliding pin rivet, and that door weight and center of gravity have a certain influence on the spring force. The longer the hinge remains stationary, the more the spring force gradually decreases, with the rate of decrease diminishing over time. After 39 days of storage, the spring force degradation tends to stabilize, and the average degradation value when the hinge arm is closed is 3 N lower than that when it is open. The model was applied to three door configurations with different weights and centers of gravity, and the calculated results were found to be in good agreement with the actual measured values.

Key words: Household appliance, Hinge suspension system, Mathematical modeling, Experimental study, Spring force