According to news from the financial industry on October 21, 2024, information from the State Intellectual Property Office shows that Daqing Wanzhongda Petroleum Technology Development Co., Ltd. has obtained a patent called \”an electric door limiter\” and authorized Announcement number CN 221823622 U, application date is February 2024.
The patent summary shows that an electric door limiter relates to the technical field of electric doors. The shell has a counterbore opening from the left end to the right. The bottom of the counterbore is fixedly connected with two contacts. The two contacts are connected to the control circuit of the electric door motor. The shell has a step hole with a diameter larger than the counterbore on the left side of the counterbore. B. The shell has a stepped hole A with a larger diameter than the stepped hole B on the left side of the stepped hole B. The guide post and the buffer post are connected with a clearance fit in the stepped hole A. The beneficial effects of the utility model are: the bottom surface of the step hole B is used to limit the buffer column, and the external force is transmitted to the housing, preventing the step shaft from excessively pressing the pressure plate and causing damage to the pressure plate and contacts, and increasing the service life of the limiter. , when the contact touches the door side column, the contact retracts, first the buffer column moves to the right, the pressure plate presses on the contact, the motor stops supplying power, and while the motor continues to rotate, the distance the machine head moves is buffered by the buffer spring , Reduce the mechanical damage caused when the machine head moves.
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