US 12,473,770 B2
Automatic door opening and closing mechanism and refrigerator
Aoxiang Zhang, Guangdong (CN); Shanshan Huang, Guangdong (CN); Zhe Sun, Guangdong (CN); and Jinchao Yan, Guangdong (CN)
Assigned to Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
Appl. No. 18/687,969
Filed by Gree Electric Appliances, Inc. of Zhuhai, Guangdong (CN)
PCT Filed Jul. 26, 2022, PCT No. PCT/CN2022/107859
§ 371(c)(1), (2) Date Feb. 29, 2024,
PCT Pub. No. WO2023/060982, PCT Pub. Date Apr. 20, 2023.
Claims priority of application No. 202111187737.5 (CN), filed on Oct. 12, 2021.
Prior Publication US 2024/0376764 A1, Nov. 14, 2024
Int. Cl. E05F 15/614 (2015.01); F25D 23/02 (2006.01)
CPC E05F 15/614 (2015.01) [F25D 23/028 (2013.01); E05Y 2201/216 (2013.01); E05Y 2900/31 (2013.01); F25D 2323/02 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An automatic door opening and closing mechanism, comprising:
a power assembly, configured to provide a driving force;
a driving gear, the driving gear being drivingly connected to the power assembly and the driving gear being provided with a first meshing tooth;
a driven gear, the driven gear being movably arranged relative to the driving gear, and the driven gear being provided with a second meshing tooth matching the first meshing tooth;
an electromagnetic clutch assembly, the electromagnetic clutch assembly being installed on the driving gear and the driven gear, and the electromagnetic clutch assembly being configured to drive the driving gear to mesh with or separate from the driven gear;
a spring holder, the driven gear being rotatably arranged on the spring holder;
a torsion spring, the torsion spring having one end connected to the driven gear and the other end connected to the spring holder; and
a hinge having a fixed shaft;
wherein the spring holder is fixedly connected to the fixed shaft, and both the driving gear and the driven gear are installed on the fixed shaft.