Suspension device

A suspension comprising:

• a body-side member that has a tubular shape and is located on a body side;
• a wheel-side member that has a tubular shape and is located on a wheel side and coupled to the body-side member, the wheel-side member being configured to move relative to the body-side member in an axial direction of the body-side member;
• a cylinder of a hollow cylindrical shape that is disposed inside of the body-side member and the wheel-side member and comprises a weak portion in the axial direction on an outer side of the cylinder;
• a rod member that is located inside of the body-side member and the wheel-side member and configured to move relatively in an axial direction of the cylinder in accordance with movement of the body-side member and the wheel-side member;
• a first defining member that is secured to an end portion of the rod member and disposed in contact with the cylinder movably in the axial direction of the cylinder, the first defining member being configured to define space in the cylinder and comprising a first damping mechanism configured to damp vibration generated by movement of the body-side member and the wheel-side member relative to each other;
• a second defining member disposed on a side of the first defining member in the axial direction on which the cylinder is disposed, the second defining member being configured to define space in the cylinder and comprising a second damping mechanism;
• a third defining member disposed on a side of the second defining member in the axial direction on which the cylinder is disposed, the third defining member being configured to define space in the cylinder and configured to move in the cylinder in the axial direction in accordance with movement of the rod member, and
• a cylinder holder whose distal end is disposed in the body-side member, wherein
• the weak portion is located further on the wheel side than the distal end of the cylinder holder and is configured to reduce a rigidity of the cylinder.