Manual charging apparatus for vacuum interrupter

A manual charging apparatus for a vacuum interrupter, the apparatus comprising:

• a motor configured to charge a closing spring mounted on a vacuum interrupter main body;
• a charging shaft configured to rotate according to a rotational force of the motor;
• and
• a manual charging handle coupled to one end of the charging shaft and configured to manually rotate the charging shaft,
• wherein the manual charging handle includes
• a cylindrical insertion part coupled to one end of the charging shaft,
• a vertically bent extension part extending from the cylindrical insertion part and configured to increase a revolution torque, and
• a vertically bent handle part extending from the vertically bent extension part and configured to apply a manual operation force,
• wherein the cylindrical insertion part includes a rotation direction restriction means configured to restrict rotation of the cylindrical insertion part in one direction, and
• wherein the rotation direction restriction means includes
• a cylindrical outer wheel having a plurality of wedge-shaped grooves formed in an asymmetrical ‘U’-shape on an inner circumferential surface,
• an inner wheel disposed within and spaced apart from the outer wheel and having a plurality of through holes,
• a plurality of roller elements disposed between the outer wheel and the inner wheel, wherein the inner wheel supports the plurality of roller elements, and wherein the plurality of roller elements are partially exposed through the through holes of the inner wheel, and
• an elastic member configured to apply an elastic force to the plurality of roller elements such that the plurality of roller elements move to a narrow portion of the plurality of wedge-shaped grooves,
• wherein the elastic member is supported by an isolation wall formed between the outer wheel and the inner wheel to push the plurality of roller elements along a circumferential direction.