JPS6312415U

JPS6312415U -

Info

Publication number: JPS6312415U
Application number: JP10563186U
Authority: JP
Priority date: 1986-07-11
Filing date: 1986-07-11
Publication date: 1988-01-27
Anticipated expiration: 2001-07-11
Also published as: JPH0537682Y2

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示し、第１図は本考
案に係る油圧サスペンシヨン装置が搭載されるト
ラツククレーンの側面図、第２図は第１図に示す
トラツククレーンの部分横断面図、第３図は本考
案に係る油圧サスペンシヨン装置の油圧回路図、
第４図は第３図の油圧シリンダの油圧回路部１０
ｄ，１２ｄ，１６ｄ，１８ｄの詳細回路図、第５
図は作動油及びパイロツト油圧の供給系統の油圧
回路図、第６図は本考案に係る油圧サスペンシヨ
ン装置の作動制御を司る姿勢制御コントローラの
入出力結線図、第７図は第４図の流量制御弁２６
を構成するチエツク弁２６ｂの詳細を示す断面構
成図、第８図は第４図のパイロツトチエツク弁２
８の詳細を示す断面構成図、第９図乃至第１５図
は第６図の姿勢制御コントローラ１２０により実
行される油圧シリンダの作動制御手順を示すプロ
グラムフローチヤート、第１６図乃至第１８図は
各々本考案に係る油圧サスペンシヨン装置の作動
を説明するための油圧回路状態図、第１９図は本
考案に係る油圧サスペンシヨン装置のシヨツクア
ブソーバ機能を説明するためのピストンスピード
と減衰力との関係を示すグラフ、第２０図乃至第
３９図は各々本考案に係る油圧サスペンシヨン装
置の作動を説明するための油圧回路状態図である
。１……トラツククレーン、３……シヤシフレー
ム、４……前輪、５……フロントアクスル、８…
…後輪、９……リアアクスル、１０，１２，１６
，１８……油圧シリンダ、１０ｂ，１２ｂ，１６
ｂ，１８ｂ……ピストン、１０ｅ，１２ｅ，１６
ｅ，１８ｅ……ストロークセンサ、１０ｆ，１２
ｆ，１６ｆ，１８ｆ……ピストン上室、１０ｇ，
１２ｇ，１６ｇ，１８ｇ……ピストン下室、２１
，２２，２３……油路、２５……リリーフ弁、２
６……流量制御弁、２６ａ……絞り、２６ｂ……
絞り付チエツク弁、２６０……ポペツト、２６５
……スペーサ、２７……パイロツト切換弁、２８
，２９……パイロツトチエツク弁、２８０……ポ
ペツト、２８３……ピストン、２８３ａ……ピス
トンロツド、２８９……スペーサ、３０……パイ
ロツト切換弁、４１……作動油圧路、４７，４９
，５０……電磁切換弁、５１，５２……パイロツ
ト油路、５４，５９，６４，６７……パイロツト
チエツク弁、５５，６０……流量制御弁、５５ａ
，６０ａ……パイロツトチエツク弁、５５ｂ，６
０ｂ……絞り、５７，６２，６５，６８……アキ
ユムレータ、７０，７１……チエツク弁、７３〜
８０……油路、９１……ドレイン、１００ａ，１
００ｂ……油圧ポンプ、１０２……電磁切換弁、
１０３……流量制御弁、１０５……電磁切換弁、
１２０……姿勢制御コントローラ、１２２……傾
斜角センサ、１２４……上下加速度Ｇセンサ、１
２５……ブレーキ圧スイツチ、１３０……姿勢コ
ントロールスイツチ、１３２……上下コントロー
ルスイツチ、１３４……マニアル切換スイツチ。 The drawings show one embodiment of the present invention; FIG. 1 is a side view of a truck crane on which a hydraulic suspension device according to the present invention is mounted; FIG. 2 is a partial cross-sectional view of the truck crane shown in FIG. 1; Figure 3 is a hydraulic circuit diagram of the hydraulic suspension device according to the present invention;
Figure 4 shows the hydraulic circuit section 10 of the hydraulic cylinder shown in Figure 3.
Detailed circuit diagram of d, 12d, 16d, 18d, 5th
The figure is a hydraulic circuit diagram of the hydraulic oil and pilot oil pressure supply system, Figure 6 is an input/output wiring diagram of the attitude control controller that controls the operation of the hydraulic suspension device according to the present invention, and Figure 7 is the flow rate of Figure 4. control valve 26
FIG. 8 is a sectional view showing the details of the check valve 26b constituting the pilot check valve 2 of FIG.
8, FIGS. 9 to 15 are program flowcharts showing the operation control procedure of the hydraulic cylinder executed by the posture control controller 120 in FIG. 6, and FIGS. 16 to 18 are respectively A hydraulic circuit state diagram for explaining the operation of the hydraulic suspension device according to the present invention, and FIG. 19 shows the relationship between piston speed and damping force for explaining the shock absorber function of the hydraulic suspension device according to the present invention. The graphs shown in FIGS. 20 to 39 are hydraulic circuit state diagrams for explaining the operation of the hydraulic suspension device according to the present invention. 1... Truck crane, 3... Chassis frame, 4... Front wheel, 5... Front axle, 8...
...Rear wheel, 9...Rear axle, 10, 12, 16
, 18... Hydraulic cylinder, 10b, 12b, 16
b, 18b...Piston, 10e, 12e, 16
e, 18e...stroke sensor, 10f, 12
f, 16f, 18f...piston upper chamber, 10g,
12g, 16g, 18g...Piston lower chamber, 21
, 22, 23... Oil path, 25... Relief valve, 2
6...flow control valve, 26a...throttle, 26b...
Check valve with throttle, 260...Poppet, 265
...Spacer, 27...Pilot switching valve, 28
, 29... Pilot check valve, 280... Poppet, 283... Piston, 283a... Piston rod, 289... Spacer, 30... Pilot switching valve, 41... Operating hydraulic path, 47, 49
, 50... Solenoid switching valve, 51, 52... Pilot oil path, 54, 59, 64, 67... Pilot check valve, 55, 60... Flow rate control valve, 55a
, 60a...Pilot check valve, 55b, 6
0b... Throttle, 57, 62, 65, 68... Accumulator, 70, 71... Check valve, 73~
80... Oil path, 91... Drain, 100a, 1
00b...Hydraulic pump, 102...Solenoid switching valve,
103...Flow control valve, 105...Solenoid switching valve,
120...Posture control controller, 122...Tilt angle sensor, 124...Vertical acceleration G sensor, 1
25...Brake pressure switch, 130...Position control switch, 132...Vertical control switch, 134...Manual changeover switch.

Claims

[Scope of utility model registration request]

a hydraulic cylinder that is interposed between a chassis frame and an axle and has a chamber on one side of the piston defined by a piston and a chamber on the other side of the piston on the piston rod side; an oil passage that communicates the chamber on one side of the piston with the chamber on the other side of the piston; It is located in the middle of the oil path and has a gas chamber and an oil chamber defined by a movable bulkhead,
an accumulator for storing a part of the hydraulic oil discharged from the one side chamber of the piston in the oil chamber when the piston moves; and an accumulator disposed in the middle of the oil passage, the oil passage being connected at least from the other side chamber of the piston to the one side chamber of the piston. A throttling means for regulating the flow rate of hydraulic oil flowing towards the piston, and a throttling means disposed in parallel with the throttling means in the middle of the oil passage, when the hydraulic pressure of the hydraulic oil flowing from the other side chamber of the piston to the one side chamber of the piston exceeds a predetermined value. 1. A hydraulic suspension device for a vehicle, comprising a relief valve that is opened when the valve is opened to maintain the hydraulic pressure at a substantially constant value.