Floor-concealed door closer comprises an electric motor arranged in a receiving chamber and having a motor shaft connected at one end to an incremental transmitter of a motor-control and at the other end to a worm shaft

摘要

Floor-concealed door closer (1) comprises at least one electric motor (5) arranged in a receiving chamber and having a motor shaft (6) connected at one end to an incremental transmitter (7) of a motor-control (8) and at the other end to a worm shaft (9). Preferred Features: Two parallel electric motors are arranged in the receiving chamber. The worm shafts mesh with a common worm gear on rotation in opposite directions.