JPS6285565U

JPS6285565U -

Info

Publication number: JPS6285565U
Application number: JP17665585U
Authority: JP
Priority date: 1985-11-15
Filing date: 1985-11-15
Publication date: 1987-06-01

Description

[Brief explanation of the drawing]

第１図は本考案３方向切換弁を搭載した建設機
械の側面図、第２図は第１図のＡより見た後方正
面図、第３図は第１図のＢより見た平面図、第４
図、第５図は本考案３方向切換弁を設けた油圧回
路図、第６図は３方向切換弁を上方より見た平面
図、第７図は第６図のＤ―Ｄより見た断面図、第
８図、第１０図、第１２図はいずれも第７図のＥ
―Ｅ断面図、第９図、第１１図、第１３図はいず
れも本考案３方向切換弁の上方より見た平面図、
第１４図は従来技術の油圧回路図である。１……上部旋回体、３……旋回モータ、５……
ブームシリンダ、７……アームシリンダ、９……
バケツトシリンダ、１０，１０′……運転室内左
右リモートコントロールレバ、１１，１１′……
機外左側、右側コントロールスタンド、１２，１
２′……機外左側、右側リモートコントロールレ
バ、１５，１５′……運転室内リモートコントロ
ール弁、１６，１６′……機外左側、右側リモー
トコントロール弁、１７……３方向切換弁、１８
，１９……油圧切換弁、２０，２１……油圧切換
弁、２２，２３……パイロツト弁、２４，２５…
…パイロツト油路、２６，２７……パイロツト油
室、２９……メインポンプ、３０……パイロツト
ポンプ、３３……外部セレクタ、３４……内部バ
ルブ、３５，３６……コネクタ、３７，３８……
コネクタ、４０……ハンドル。 Fig. 1 is a side view of a construction machine equipped with the three-way switching valve of the present invention, Fig. 2 is a rear front view as seen from A in Fig. 1, and Fig. 3 is a plan view as seen from B in Fig. 1. Fourth
Figure 5 is a hydraulic circuit diagram equipped with the 3-way switching valve of the present invention, Figure 6 is a plan view of the 3-way switching valve seen from above, and Figure 7 is a cross section taken along line D-D in Figure 6. Figures 8, 10, and 12 are all E of Figure 7.
- E sectional view, Figures 9, 11, and 13 are all plan views of the three-way switching valve of the present invention seen from above;
FIG. 14 is a hydraulic circuit diagram of the prior art. 1... Upper revolving body, 3... Swing motor, 5...
Boom cylinder, 7... Arm cylinder, 9...
Bucket cylinder, 10, 10'... Driver's cab left and right remote control levers, 11, 11'...
External left side, right side control stand, 12,1
2'...Left side outside the machine, right side remote control lever, 15, 15'...Remote control valve inside the operator's room, 16, 16'...Left side outside the machine, right side remote control valve, 17...3-way switching valve, 18
, 19... Hydraulic switching valve, 20, 21... Hydraulic switching valve, 22, 23... Pilot valve, 24, 25...
...Pilot oil passage, 26, 27...Pilot oil chamber, 29...Main pump, 30...Pilot pump, 33...External selector, 34...Internal valve, 35, 36...Connector, 37, 38...
Connector, 40...handle.

Claims

[Scope of utility model registration request]

In construction machinery that uses pilot oil pressure from a remote control valve to switch hydraulic switching valves to operate various actuators, remote control valves are installed on the left and right sides of the upper revolving body, and a 3-way switching valve is installed in the operator's cab. provided, said 3
The connector part on the outer periphery of the external selector of the directional switching valve connects the pilot oil passages from the left and right remote control valves in the operator's cabin and outside the machine, and the pilot oil passages communicating with the hydraulic switching valve at stepped positions. , an internal valve having a handle is rotatably inserted into the external selector, and depending on the rotational position of the internal valve, each notch at a stepwise corresponding position of the internal valve communicates with the hydraulic switching valve. The structure of a three-way switching valve for construction machinery has a function of communicating the road group with either the operator's cab or the pilot oil road group from the left and right remote control valves.