Clamping apparatus for luggage rack of passenger car for fastening supporting foot at roof rails of motor car, has overload protection device transferring rotating movement of rotary unit into screwing movement of screwing arrangement

摘要

The apparatus (3) has a clamping element (5) moving along a clamping axis and coaxially acting on the clamping axis by a screwing arrangement to obtain bias voltage. The screwing arrangement is rotated by a manual operable rotary unit (4). The screwing arrangement is provided with an overload protection device (6) to transfer rotating movement of the rotary unit into screwing movement of the screwing arrangement. The overload protection device comprises spring portions that are engaged with gearing portions of the screwing arrangement.