JPH0384207U

JPH0384207U -

Info

Publication number: JPH0384207U
Application number: JP14620389U
Authority: JP
Priority date: 1989-12-19
Filing date: 1989-12-19
Publication date: 1991-08-27

Description

[Brief explanation of the drawing]

図面はこの考案の最適な一実施例に係る車高調
整装置を示す構成図である。符号の説明、Ｂ……車体、ＢＬ……バイパス路
、ＢＬ１，ＢＬ２……分岐路、ＬＬ……下方油路
、ＬＮ……中間油路、ＬＳ……上方油路、ｐｎ，
ｐｕ……パイロツト通路、ＰＷ……油圧源、Ｓ…
…車高調整用シリンダ、Ｓ１……ロツド側油室、
Ｓ２……ピストン側油室、Ｓ３……ピストン部、
Ｖ……切換弁、Ｖ２，Ｖ３……供給ポジシヨン、
Ｖ４……ソレノイド、Ｖ５……スプリング、ＶＬ
，ＶＮ，ＶＵ……オペレートチエツク弁。 The drawing is a configuration diagram showing a vehicle height adjustment device according to a preferred embodiment of this invention. Explanation of symbols, B...Vehicle body, BL...Bypass road, BL1, BL2...Branch road, LL...Lower oil passage, LN...Intermediate oil passage, LS...Upper oil passage, pn,
pu...Pilot passage, PW...Hydraulic power source, S...
...Vehicle height adjustment cylinder, S1...Rod side oil chamber,
S2... Piston side oil chamber, S3... Piston part,
V...Switching valve, V2, V3...Supply position,
V4...Solenoid, V5...Spring, VL
, VN, VU...Operate check valve.

Claims

[Scope of utility model registration request]

A vehicle height adjustment cylinder whose upper end is connected to the vehicle body side and whose lower end is connected to the axle side, an upper oil passage communicating with a rod side oil chamber in the vehicle height adjustment cylinder, and an inside of the vehicle height adjustment cylinder. a lower oil passage communicating with the piston-side oil chamber of the vehicle height adjusting cylinder; an intermediate oil passage communicating with the vehicle height adjusting cylinder at an intermediate stroke position of the piston portion sliding within the vehicle height adjusting cylinder; An operating check valve is disposed in the oil passage and allows hydraulic oil to flow out from the rod side oil chamber when an external operating force is supplied; In a vehicle height adjustment device comprising an operation check valve that allows hydraulic oil to flow out from a side oil chamber, and a hydraulic power source consisting of a bidirectional pump connected to the lower oil passage, an external An operator check valve is provided to allow hydraulic oil to flow out from the vehicle height adjustment cylinder when operating force is applied.
An end of the intermediate oil passage is connected to an upper oil passage,
Further, pilot pressure as an external operating force is supplied to each of the operating check valves in the upper oil passage and the intermediate oil passage through a switching valve when the bidirectional pump rotates normally, and the pilot pressure in the lower oil passage is supplied as an external operating force. A vehicle height adjusting device characterized in that the operating check valve is configured so that pilot pressure is supplied as an external operating force when the bidirectional pump is reversed.