Torque transmission joint and electric power steering apparatus

A torque-transmission joint for transmitting torque between a driving shaft and a driven shaft that are arranged in series with each other in an axial direction thereof, comprising:

• a driving-side transmission member concentrically supported by an end section of the driving shaft;
• a driven-side transmission member concentrically supported by an end section of the driven shaft;
• a shock-absorbing member made from an elastic material and provided between the driving-side transmission member and the driven-side transmission member;
• and
• a damper section held directly between end surfaces of the driving shaft and the driven shaft,
• the driving-side transmission member comprising:
• a driving-side base section supported by the end section of the driving shaft;
• and
• plural driving-side arm sections provided intermittently in a circumferential direction on a surface of the driving-side base section that faces the driven-side transmission member, the plural driving-side arm sections respectively protruding in the axial direction therefrom;
• the driven-side transmission member comprising:
• a driven-side base section supported by the end section of the driven shaft;
• and
• plural driven-side arm sections provided intermittently in a circumferential direction on a surface of the driven-side base section that faces the driving-side transmission member, the plural driven-side arm sections respectively protruding in the axial direction therefrom;
• the shock-absorbing member comprising plural held sections;
• and
• the driving-side arm sections and the driven-side arm sections arranged alternately in the circumferential direction, and the held sections placed in between side surfaces of the driving-side arm sections and driven-side arm sections that are adjacent to each other in the circumferential direction;
• and
• the damper section comprising a ring-shaped connecting section thinner than the damper section, the damper section integrally provided with the shock-absorbing member by way of the ring-shaped connecting section being connected to the held sections.