Vacuum interrupter

A vacuum interrupter, comprising:

• at least one insulating body;
• a fixed-contact flange;
• a fixed contact disposed in a stationary manner in said fixed-contact flange;
• a moving-contact bearing;
• a moving contact having a moving-contact contact disk, a moving-contact rod and a longitudinal axis, said moving contact being movably guided in said moving-contact bearing;
• a moving-contact flange;
• a bellows having a first bellows end, a second bellows end and a bellows cap, said bellows cap connecting said second bellows end to said moving-contact rod, said bellows movably fastening said moving contact to said moving-contact flange by fastening said first bellows end to said moving-contact flange and fastening said second bellows end to said moving contact;
• said moving-contact bearing disposed outside of said bellows;
• a sleeve providing an increased pressure resistance of the vacuum interrupter against ambient pressures over 1 bar, said sleeve being fixed on said moving contact against movements between said sleeve and said moving contact along said longitudinal axis of said moving contact and said sleeve passing through said moving-contact bearing, said sleeve extending out from said first bellows end through said moving-contact bearing;
• said moving contact having a thickened portion not present at said sleeve;
• said sleeve being fixed in position on said moving contact in at least one of a region of said second bellows end or a region of said bellows cap by a press fit, latching, interlocking, soldering or welding of said thickened portion, and said press fit of said sleeve being provided between said second bellows end and said moving contact or between said bellows cap and said moving contact rod;
• and
• a fastening device fixing said sleeve on said moving contact and preventing relative movement along said longitudinal axis of said moving contact between said moving contact and said sleeve during movement of said moving contact;
• said moving-contact rod and said bellows cap defining a press-in region therebetween, and said sleeve being pressed into said press-in region.