Locking device, especially for motor vehicle locking

The locking device with a locking cylinder, especially for motor vehicle locking, wherein the locking cylinder has a cylinder guide and a cylinder core which is rotatably supported therein along a longitudinal axis so as to be fixed axially and serves to receive a key and can be locked with the cylinder guide via spring-loaded tumblers when the key is withdrawn, the cylinder guide being rotatably supported in a stationary housing, but fixed with respect to rotation therein via an overload catch which is brought into an effective position, wherein the overload catch has a floating push-rod, a radial opening enclosing said push-rod, and a radial recess which receives only an inner radial end of the push-rod the radial recess being defined by stop cams which lift the end of the push-rod out of the radial recess when a determined torque is exerted on the cylinder core or by the cylinder core on the cylinder guide and accordingly set the overload catch in a free-running position, and when the inserted key is rotated, the cylinder core transmits the torque, via a radially displaceable and radially spring-loaded radial slide, to a driver which performs the locking functions in a motor vehicle wherein the radial slide has a stop face for the push-rod and presses the push-rod into the radial recess of the overload catch due to the spring-loaded radial slide, and the push-rod, which is lifted out of the radial recess at a determined torque, displaces the radial slide, an improvement comprising that

• said radial slide is guided radially in the driver and is always connected with the driver so as to be fixed with respect to rotation relative thereto;
• coupling faces are provided between the radial slide and one of a cylinder core and a core pin forming an extension of said core,
• stopping surfaces are provided between the radial slide and the housing,
• said radial slide engages with either said coupling faces of the cylinder core or with the stopping surfaces of the housing;
• and
• said radial spring loading between the driver and the radial slide presses the push-rod in the direction of the rotational axis of the cylinder core and holds the overload catch in the effective position.