JPS62167706U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a hydraulic circuit diagram of a vehicle height adjustment device to which the valve structure according to the present invention is applied, Fig. 2 is a cross-sectional view of the valve block, Fig. 3 is a cross-sectional view taken along the line AA in Fig. 2, and Fig. 4 5 is a hydraulic circuit diagram of a conventional vehicle height adjustment device, and FIG. 5 is a sectional view of a conventional valve block. In the drawings, 1 is a motor, 2 is a pump, 3 is a tank, 5 is a supply oil path, 6 and 14 are check valves, 8 is a hydraulic jack, 9 is a return oil path, and 10 is a spool valve.

Claims (1)

[Scope of utility model registration request] The hydraulic oil in the tank is pumped up,
This pumped up hydraulic oil is supplied to the hydraulic jack via a supply oil line equipped with a check valve to raise the vehicle height, and the hydraulic oil in the hydraulic jack is transferred to the tank via a return oil line equipped with a check valve. In the vehicle height adjustment device, a spool valve is provided between the supply oil path and the return oil path, and the spool valve is defined by a spool and is configured to lower the vehicle height by discharging the oil. An oil chamber communicating with the oil passage is formed, and a check valve in the return oil passage is closed when hydraulic oil is supplied to the oil chamber of the spool valve, and a check valve in the supply oil passage and a check valve in the return oil passage are closed. A switching valve structure for a vehicle height adjustment device, characterized in that a check valve and a spool valve are incorporated into one valve block.