Gear unit for gate drives

摘要

The invention relates to a gear unit with hollow shaft for gate drives, preferably for driving sectional and roller gates. According to the invention the gear unit comprises a hollow shaped part which can be introduced into the hollow shaft, the outside and inside of which are made in such a way that the connection with a shaft to be accomodated in the hollow shaped part and with the hollow shaft accomodating the hollow shaped part is form-locking in the turning direction.