Electric suspension device and motorcycle
AssigneesYamaha Hatsudoki Kabushiki Kaisha, Kayaba Industry Co., Ltd.
InventorsShuji Tominaga, Yuki Amano
Life of this patent
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Abstract
An electric suspension device includes a cylinder, a sub-tank, a first oil passage and a second oil passage, a damping force adjusting valve, and a damping force adjusting motor. The cylinder is rotatable about a mounting axis. The first oil passage connects a first inner oil chamber and an outer oil chamber. The second oil passage connects the first inner oil chamber of the cylinder and an oil chamber of the sub-tank. The first and second oil passages are disposed outside an inner tube and an outer tube, and share a portion with each other. The first and second oil passages are entirely disposed on the same side with respect to a reference plane.
Claims11
An electric suspension device for a motorcycle that absorbs shocks between a vehicle body frame and a rear wheel, the electric suspension device comprising:
- a cylinder including an inner tube filled with oil, a piston that partitions an interior of the inner tube into a first inner oil chamber and a second inner oil chamber, and an outer tube surrounding the inner tube, the outer tube defining around the inner tube an outer oil chamber that is continuous with the second inner oil chamber, the cylinder arranged to be supported on the vehicle body frame so as to be rotatable about a mounting axis extending in a left-right direction of the electric suspension device;
- a sub-tank including an interior partitioned into an oil chamber filled with oil and a gas chamber filled with gas;
- a first oil passage disposed outside the inner tube and the outer tube, the first oil passage being arranged to connect the first inner oil chamber and the outer oil chamber;
- a second oil passage disposed outside the inner tube and the outer tube, the second oil passage being arranged to connect the first inner oil chamber and the oil chamber of the sub-tank;
- a damping force adjusting valve to apply resistance to oil flowing through the first oil passage;
- and
- a damping force adjusting motor to adjust an opening degree of the damping force adjusting valve;
- wherein
- the first oil passage and the second oil passage share a portion with each other, and an entirety of the first oil passage and an entirety of the second oil passage are disposed on a same side with respect to a reference plane that is orthogonal or substantially orthogonal to the mounting axis and includes a center line of the cylinder.
Dependencies are inferred from the claim text.