Abstract: The door double-axis self-locking part of refrigerator has no fixed rotation axis, it makes the door body will not interfere with the objects on the side of the refrigerator during the door opening and closing. Similar to single-axis self-locking part, the unreasonable design will lead to a poor force sense during the door opening and closing, or the door cannot be closed tightly and so on. It aims at the problem that the door double-axis self-locking part of a high-end refrigerator has excessive pushing force and a poor smoothness of force sense during the door closing process, analyzes the original self-locking force with the help of simulation means, optimizes the structures of hinge and suction assisting device, analyzes the feasibility of the scheme adopts simulation means, at last makes the samples and verifies their practical effects. The results show that the optimized double-axis self-locking part can greatly reduce the pushing force during the door closing process on the premise of ensuring the self-locking function, at the same time it improves the smoothness of force sense, and provides the control and optimization directions for the design of double-axis self-locking part.

Key words: Double-axis self-locking part, Structure optimization, Simulation analysis, Self-locking force, Smoothness of force sense