Torsion spring assembly, camshaft phaser and belt or chain tightener therewith

A torsion spring assembly, comprising:

• a torsion spring (TS) having a TS cylindrical spring body of wound spring wire having a first wire diameter, and with a plurality of torsion spring windings, and having first and second torsion spring ends configured to take up forces in a direction of rotation;
• and
• a damping spring (DS) abutting the torsion spring on an inner side of the torsion spring, and having a DS cylindrical spring body of wound spring wire having a second wire diameter, and with a plurality of damping spring windings, and having first and second damping spring wire ends, and each of the plurality of damping spring windings has an outer side;
• wherein the second wire diameter is smaller than the first wire diameter;
• and
• wherein at least one of the plurality of damping spring windings has its outer side extending partially into a space formed between two respectively adjacent torsion spring windings of the plurality of torsion spring windings, and abuts an inner abutment area of each of the respectively adjacent torsion spring windings with substantially radially outwardly directed bias;
• and
• wherein the plurality of torsion spring windings of the torsion spring has at least one more winding than the plurality of damping spring windings;
• and
• wherein the plurality of damping spring windings extend across a major part of a height of the cylindrical spring body of the torsion spring, from a first end abutment section located in front of the first torsion spring wire end, as seen in the direction of rotation, to a second end abutment section located in front of the second torsion spring wire end, as seen in the direction of rotation.