Vehicle height control device for motorcycle

摘要

A vehicle height control device comprises a vehicle height control unit including a jack housing of a hydraulic jack provided at an upper end portion of an inner tube, a suspension spring provided between an upper end of a hollow pipe and a plunger of the hydraulic jack, a pump housing provided at the plunger of the hydraulic jack and forming a pump chamber of a hydraulic pump, and a pump pipe communicating with an oil reservoir chamber on an inner periphery of the hollow pipe and slidably inserted into the pump chamber in the pump housing, and a selector valve controlling the vehicle height by adjusting the amount of hydraulic oil fed to a jack chamber in the hydraulic jack by the hydraulic pump that performs the pumping operation in conjunction with extending and contracting motion of the hollow pipe with respect to the inner tube.

主权项

1. A vehicle height control device for a motorcycle with a pair of dampers disposed on laterally opposite sides of a vehicle body, the vehicle height control device comprising:
a vehicle height control unit provided in at least one of the left and right dampers, wherein the damper provided with the vehicle height control unit includes: a wheel-side outer tube; a vehicle body-side inner tube slidably inserted into the wheel-side outer tube; a hollow pipe installed upright in an inner bottom portion of the outer tube and including a partition wall portion that is in sliding contact with an inner periphery of the inner tube; a piston provided on an inner periphery of a leading end portion of the inner tube; an oil chamber provided on an outer periphery of the hollow pipe in such a manner that the piston advances into and retracts from the oil chamber, the oil chamber being partitioned by the piston into an upper oil chamber above the piston and a lower oil chamber below the piston; and an oil reservoir chamber defined by an inner periphery of the hollow pipe and spanning to an upper portion of the inner tube, the oil reservoir chamber having an upper portion that forms an air chamber, and wherein the vehicle height control unit includes: a hydraulic jack including a jack housing and a plunger, the jack housing being provided at an upper end portion of the inner tube such that the plunger defining a jack chamber of the hydraulic jack is fitted on the jack housing so as to be movable up and down; a suspension spring provided between an upper end of the hollow pipe and the plunger of the hydraulic jack; a hydraulic pump including a pump housing and a pump pipe, the pump housing being provided at the plunger of the hydraulic jack and forming a pump chamber of the hydraulic pump such that the pump pipe installed upright at the upper end of the hollow pipe and communicating with the oil reservoir chamber on the inner periphery of the hollow pipe is slidably inserted into the pump chamber in the pump housing; and a selector valve controlling a vehicle height by adjusting an amount of hydraulic oil fed to the jack chamber in the hydraulic jack by the hydraulic pump that performs a pumping operation in conjunction with extending and contracting motion of the hollow pipe with respect to the inner tube.