Cylinder device

A cylinder device comprising:

• a tubular outer tube;
• and
• a rod that protrudes from one end of the outer tube and strokes,
• wherein one side in a radial direction and another side in the radial direction with respect to the central axis are divided in an orthogonal cross section at any axial position of the outer tube along a central axis of the rod, a cross-sectional area of the outer tube on the one side in the radial direction is smaller than a cross-sectional area of the outer tube on the other side in the radial direction, and a thickness of the outer tube on the one side in the radial direction is thinner than a thickness of the outer tube on the other side in the radial direction,
• a point on the central axis in the orthogonal cross section is defined as a stroke center point, and
• when a distance from the stroke center point on the one side in the radial direction to any position along a radially outer surface of the outer tube is defined as a distance li11, and a distance from the stroke center point on the other side in the radial direction to any position along a radially outer surface of the outer tube, which is at a point-symmetrical position with respect to the distance li11 with the stroke center point as a reference, is defined as a distance lo11, the distance li11 is longer than the distance lo11 at any axial position of the outer tube.

A cylinder device comprising:

• a piston;
• a buffer mechanism having a piston rod connected to the piston;
• a tubular inner tube housing the buffer mechanism;
• and
• an outer tube housing the inner tube,
• wherein the outer tube has a pair of knuckle attachment portions provided integrally with the outer tube and protruding toward one direction from an outer surface of the outer tube,
• the pair of knuckle attachment portions have wide surfaces facing each other, the wide surfaces being provided along an axial direction of the outer tube,
• when an inside of a vehicle is defined as a virtual region I and an outside of the vehicle is defined as a virtual region II with a virtual line, which passes through a stroke center line and matches the inside and the outside of the vehicle, as a boundary in an orthogonal cross section at any axial position of the outer tube (i) along the stroke center line of the piston rod and (ii) orthogonal to the stroke center line of the piston rod, a second moment of area of the outer tube in the virtual region I is larger than a second moment of area of the outer tube in the virtual region II, and a thickness of the outer tube in the virtual region I is thicker than a thickness of the outer tube in the virtual region II,
• a point on the stroke center line in the orthogonal cross section is defined as a stroke center point, and
• when a distance from the stroke center point in the virtual region I to any position along a radially outer surface of the outer tube is defined as a distance li11, and a distance from the stroke center point in the virtual region II to any position along a radially outer surface of the outer tube, which is at a point-symmetrical position with respect to the distance li11 with the stroke center point as a reference, is defined as a distance lo11, the distance li11 is longer than the distance lo11 at any axial position of the outer tube.

A cylinder device comprising:

• a tubular outer tube;
• and
• a rod that protrudes from one end of the outer tube and strokes,
• wherein one side in a radial direction and another side in the radial direction with respect to the central axis are divided in an orthogonal cross section at any axial position of the outer tube along a central axis of the rod, a second moment of area of the outer tube on the one side in the radial direction is smaller than a second moment of area of the outer tube on the other side in the radial direction, and a thickness of the outer tube on the one side in the radial direction is thinner than a thickness of the outer tube on the other side in the radial direction,
• a point on the central axis in the orthogonal cross section is defined as a stroke center point, and
• when a distance from the stroke center point on the one side in the radial direction to any position along a radially outer surface of the outer tube is defined as a distance li11, and a distance from the stroke center point on the other side in the radial direction to any position along a radially outer surface of the outer tube, which is at a point-symmetrical position with respect to the distance li11 with the stroke center point as a reference, is defined as a distance lo11, the distance li11 is longer than the distance lo11 at any axial position of the outer tube.