Electrically powered fire door closer

Abstract

This utility model discloses an electrically assisted fire door closer, including a door closer body. A support shaft is rotatably connected to the door closer body via a bearing. A gear is fixedly installed on the support shaft, and the gear meshes with a piston. The piston is slidably connected to the inner wall of the door closer body. A spring is installed at one end of the piston, and an electric assist mechanism is connected to the end of the spring away from the piston. A support ring is fixedly installed on the door closer body, and the support ring is rotatably connected to the support shaft via a bearing. This invention relates to the field of door closer technology. By setting an electric assist mechanism and using a pressure sensor to detect pressure values, when the door is opened too wide (i.e., the pressure value exceeds a preset value), the controller controls the electric push rod to extend and continue compressing the spring, thereby increasing the spring force and achieving effective door closing, thus ensuring the reliability of automatic door closing.

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