1. Field of the Invention
An embodiment of the present invention relates to an air suspension.
2. Related Art
A motorcycle is provided with a suspension for, for example, comfort riding. As the suspension of the motorcycle, there is an air suspension having an air spring structure including a damper main body, which includes, for example, a cylinder in which a piston slides, and a diaphragm structure, which includes a diaphragm in which air is filled.
As the air suspension, for example, there is an air suspension of a so-called upright type in which a piston rod is present on a vehicle body side and a cylinder of a damper main body is present on an axle side. In the air suspension of the upright type, since the diaphragm structure is located on the vehicle body side, a valve section for filling the air in the diaphragm is provided in an upper part of the diaphragm structure.
In recent years, for example, an air suspension of a so-called inverted type is often used in which a cylinder of a damper main body is present on a vehicle body side and a piston rod is present on an axle side. In the air suspension of the inverted type, since the diaphragm structure is located on the axle side, a valve section for filling the air in the diaphragm is provided in a lower part of the diaphragm structure.