Patent ID: 8783696
Filing Date: 2014-07-22
Classification: B60G,B62K,F16F

Abstract:
1. 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.