Vehicle-height adjustment apparatus of motorcycle
AssigneeShowa Corporation
InventorYosuke Murakami
Life of this patent
Estimating the term…
Abstract
In a vehicle-height adjustment apparatus of a motorcycle having the hydraulic jack attached to the damper, damping force characteristics of a damper are stabilized, the influence of the charged gas pressure of an oil reservoir chamber is eliminated, and the sealing performance of a hydraulic jack is reduced. In the vehicle-height adjustment apparatus of a motorcycle, a back pressure chamber is provided on a side opposite to a jack chamber, with a plunger being interposed therebetween inside a hydraulic jack, and this back pressure chamber is communicated with a hydraulic chamber inside a damper tube.
Claims6
A vehicle-height adjustment apparatus of a motorcycle including a damper in which a piston rod slides in a hydraulic chamber inside a damper tube, and a suspension spring,
- the vehicle-height adjustment apparatus comprising:
- a hydraulic jack provided on one of the damper tube and the piston rod;
- a jack chamber provided inside the hydraulic jack;
- a plunger inserted in the jack chamber;
- a spring bearing supported by the plunger, wherein the suspension spring is interposed between the spring bearing and a spring bearing provided on the other one of the damper tube;
- and
- a hydraulic pump that is caused to perform a pumping operation by extension and compression movements of the piston rod relative to the damper tube and supplies and drains oil of the hydraulic chamber inside the damper tube to and from the jack chamber of the hydraulic jack, whereby adjusting a vehicle height,
- wherein the vehicle-height adjustment apparatus further comprises a back pressure chamber that is provided on a side opposite to the jack chamber, with the plunger being interposed therebetween inside the hydraulic jack, and that is communicated with the hydraulic chamber inside the damper tube.
Dependencies are inferred from the claim text.