Connection structure

A connection structure comprising:

• first and second members disposed facing each other in a relatively movable manner;
• and
• a damper member, wherein the first and second members are connected with each other via the damper member in a connected state of the connection structure,
• wherein the damper member is made of an elastically deformable material, and the damper member includes:
• a cylindrical portion having a through-hole that penetrates in an axial direction of the cylindrical portion, wherein the cylindrical portion has first and second ends opposite to each other in the axial direction;
• a flange portion provided at the first end on an outer periphery of the cylindrical portion so as to extend radially outward, wherein the flange portion has first and second contact surfaces opposite to each other in the axial direction;
• a first vibration absorbing portion provided on an inner periphery and the outer periphery of the cylindrical portion;
• and
• a second vibration absorbing portion provided on one of the first contact surface and the second contact surface of the flange portion,
• wherein the first member includes;
• a convex support portion fitting to the inner periphery of the cylindrical portion in the connected state;
• and
• a first contact portion in contact with the first contact surface of the flange portion in the connected state,
• wherein the second member includes;
• a concave support portion fitting to the outer periphery of the cylindrical portion in the connected state;
• a second contact portion in contact with the second contact surface of the flange portion in the connected state;
• and
• a bottom portion located at a bottom of the concave support portion, wherein a gap is formed between the bottom portion and the second end of the cylindrical portion in the connected state,
• wherein the first vibration absorbing portion is a plurality of ribs each protruding radially outward of the cylindrical portion and extending in the axial direction of the cylindrical portion, and
• wherein the plurality of ribs are provided alternately on the inner periphery and outer periphery of the cylindrical portion such that positions of the ribs differ from one another in a circumferential direction of the cylindrical portion.