Vehicle height adjustment device

摘要

A vehicle height adjustment device includes a jack chamber for supporting a spring receiver supporting a suspension spring's one-side end portion and a fluid-pressure driving unit for supplying/discharging an operating fluid into/out of the jack chamber and elevating up/down the spring receiver. The fluid-pressure driving unit includes a pump for selectively supplying the operating fluid to a first or second channel and a tank connected to the first or second channel not receiving an operating fluid's supply from the pump. The vehicle height adjustment device further includes a jack channel allowing the first channel and the jack chamber to communicate with each other, a valve body closing the jack channel, capable of opening/closing, a spring for urging the valve body in a direction for shutting off the jack channel, and a pilot line for having a second channel's pressure act on the valve body so the jack channel is opened.

主权项

1. A vehicle height adjustment device mounted on a vehicle and adapted to adjust a vehicle height, comprising:
a suspension spring adapted to elastically support a vehicle body; a spring receiver adapted to support a one-side end portion of the suspension spring; a jack chamber filled with an operating fluid and adapted to support the spring receiver; and a fluid-pressure driving unit adapted to supply and discharge the operating fluid into and out of the jack chamber and to elevate up and down the spring receiver, wherein the fluid-pressure driving unit includes:
a first channel and a second channel;a pump adapted to selectively supply the operating fluid to the first channel or the second channel; anda tank connected to the first channel or the second channel not receiving a supply of the operating fluid from the pump; and the vehicle height adjustment device further includes:
a jack channel adapted to allow the first channel and the jack chamber to communicate with each other;a valve body adapted to close the jack channel, capable of opening and closing;a spring adapted to urge the valve body in a direction for shutting off the jack channel; anda pilot line adapted to have a pressure of the second channel act on the valve body so that the jack channel is opened.