Screw unit for connecting machine cover to machine housing, has spring washer that is provided in spring element surrounding threaded shaft such that threaded shaft is rotated and unscrewed from hole of housing

摘要

The screw unit has a screw (12) that is fixed by a spring element at the machine cover (10). The spring element is designed as resilient holding element. A spring washer (17) is provided in the spring element surrounding the threaded shaft (13) such that the threaded shaft is rotated and unscrewed from the hole of housing (11). The spring washer is made of plastic or rubber. The aperture (18) is formed in the spring washer for the passage of threaded shaft.