Vibration absorption device

A vibration absorption device comprising:

• a cylindrical bracket having a constant inner diameter, coupled with one of a vibration generating section or a vibration receiving section and having an inner surface formed in a linear shape in a cylinder axial direction;
• an external cylinder made of resin and including:
• a small diameter section that is formed in a cylindrical shape, is press-fit into a cylinder of the bracket, and has a small diameter surface formed at an outer surface and configured at a press-fitting leading end with respect to the bracket;
• a large diameter section that, before the press-fitting, has an outer diameter that is larger than an inner diameter of the bracket and an outer diameter of the small diameter section, and has a large diameter surface formed at an outer surface, having a thickness that is thicker than the small diameter section, and configured at a portion nearer to a press-fitting rear end side with respect to the bracket than the small diameter section;
• and
• an intermediate section that is configured between the small diameter section and the large diameter section and has a standing surface formed at an outer surface that joins the small diameter surface and the large diameter surface;
• an internal cylinder that is disposed at an inner peripheral side of the external cylinder and is coupled with the other one of the vibration generating section or the vibration receiving section;
• and
• an elastic body that is interposed between the inner peripheral surface of the external cylinder and an outer peripheral surface of the internal cylinder, and that joins the external cylinder and the internal cylinder to each other,
• wherein the large diameter section is formed at the outer surface, which is press-fitted, of the external cylinder,
• wherein a length of the large diameter section in the cylinder axial direction is greater than a length of the small diameter section in the cylinder axial direction,
• wherein at the external cylinder, a flange section is provided at an outer side in a radial direction of a press-fitting rear end with respect to the bracket,
• wherein the large diameter section is formed from a portion of the external cylinder, which is nearer to the flange than the small diameter section, to the flange,
• wherein the standing surface is tapered such that a diameter of the standing surface increases from the small diameter section towards the large diameter section,
• wherein the large diameter section extends all the way between the flange and the intermediate section and the thickness of the large diameter section remains constant between the flange and the intermediate section, and
• wherein an outer surface of the small diameter section extends in a direction parallel or substantially parallel with an outer surface of the large diameter section.