Charging mechanism for charging a stored-energy spring of a stored-energy spring mechanism

A tensioning mechanism for tensioning an accumulator spring of a spring stored energy mechanism, the tensioning mechanism comprising:

• a tensioning gear coupled to the accumulator spring;
• an intermediate shaft coupled to said tensioning gear;
• an intermediate gear to be driven by a tensioning motor;
• a freewheel coupled to said intermediate gear;
• and
• a dog clutch disposed to couple said freewheel to said intermediate shaft in order to tension the accumulator spring and to decouple said freewheel from said intermediate shaft in a tensioned state of the accumulator spring;
• said dog clutch having a first clutch block fixedly coupled to said intermediate shaft so as to rotate with said intermediate shaft and a second clutch block connected to said freewheel;
• said first clutch block being displaceable between two end positions along a rotational axis of said intermediate shaft, and having a plurality of first dogs which face toward said second clutch block and are arranged around said intermediate shaft;
• said second clutch block having a plurality of second dogs facing toward said first clutch block;
• and
• said first clutch block being configured to assume an intermediate between the two end positions, and in the intermediate position of said first clutch block, each of said second dogs protruding into an intermediate space between two adjacent first dogs, having a stop face for one of said two adjacent first dogs, on which stop face a side face of said first dog bears when said first clutch block is rotated with respect to said second clutch block in a first rotational direction about the rotational axis, and forming a ramp for another of said two adjacent first dogs, on which ramp said first dog slides when said first clutch block is rotated with respect to said second clutch block about the rotational axis in a second rotational direction opposite the first rotational direction;
• and
• a coupling element connected to said first clutch block and guided through a transverse opening in said intermediate shaft, said transverse opening running perpendicularly with respect to the rotational axis of said intermediate shaft, and said coupling element being displaceable in said transverse opening parallel to the rotational axis of said intermediate shaft between a first position, defining one of said two end positions of said first clutch block, and a second position, defining another of said two end positions of said first clutch block.