JPS6185559U

JPS6185559U -

Info

Publication number: JPS6185559U
Application number: JP17136784U
Authority: JP
Priority date: 1984-11-12
Filing date: 1984-11-12
Publication date: 1986-06-05

Description

[Brief explanation of the drawing]

第１図はこの考案による建設機械におけるアウ
トリガの油圧回路の一実施例を示す系統図、第２
図はホイール式油圧シヨベルの一例を示す側面図
、第３図は第２図の−平面図、第４図ないし
第６図はアウトリガの異なる張り出し状態を示す
説明図、第７図はアウトリガの格納状態を示す説
明図、第８図、第９図は従来のアウトリガの油圧
回路を示す系統図、第１０図は走行体の後部に排
土板を装着したホイール式油圧シヨベルを示す側
面図である。７Ａ…第一アウトリガシリンダ、７Ｂ…第二ア
ウトリガシリンダ、８Ａ…第三アウトリガシリン
ダ、８Ｂ…第四アウトリガシリンダ、９…油圧ポ
ンプ、１０…第一コントロールバルブ、１１…第
二コントロールバルブ、１２…回路、１３…回路
、１４…回路、１５…回路、１６…回路、１７…
センタジヨイント、２２…切替弁。 Figure 1 is a system diagram showing an example of the hydraulic circuit of an outrigger in a construction machine according to this invention;
The figure is a side view showing an example of a wheel-type hydraulic excavator, Figure 3 is a top view of Figure 2, Figures 4 to 6 are explanatory diagrams showing different extended states of the outriggers, and Figure 7 is the retraction of the outriggers. An explanatory diagram showing the state, FIGS. 8 and 9 are system diagrams showing the hydraulic circuit of a conventional outrigger, and FIG. 10 is a side view showing a wheel-type hydraulic excavator with an earth removal plate attached to the rear of the traveling body. . 7A...First outrigger cylinder, 7B...Second outrigger cylinder, 8A...Third outrigger cylinder, 8B...Fourth outrigger cylinder, 9...Hydraulic pump, 10...First control valve, 11...Second control valve, 12...Circuit , 13...circuit, 14...circuit, 15...circuit, 16...circuit, 17...
Center joint, 22...Switching valve.

Claims

[Scope of utility model registration request]

Three oil passages are provided between the circuits connecting the control valve on the rotating body side and the first front outrigger cylinder, the second front outrigger cylinder, the third rear outrigger cylinder, and the fourth rear outrigger cylinder on the traveling body side. In the outrigger hydraulic circuit of a construction machine equipped with a center joint, both front outrigger cylinders and both rear outrigger cylinders are independently installed in the middle of the circuit connecting the center joint and each outrigger cylinder. Also, a switching valve is installed to independently operate both left and right outrigger cylinders.
The head chambers of two outrigger cylinders in one set are connected to one operating port of the switching valve, and the head chambers of two outrigger cylinders in another set are connected to the other operating port of the switching valve. Hydraulic circuit.