JPS6322401U

JPS6322401U -

Info

Publication number: JPS6322401U
Application number: JP11455486U
Authority: JP
Priority date: 1986-07-28
Filing date: 1986-07-28
Publication date: 1988-02-15

Description

[Brief explanation of drawings]

第１図は本考案に係る切換バルブの横断面図、
特にＡ社方式への切換えた状態を示す。第２図は
同じく縦断面図。第３図はパイロツト弁における
Ａ社、Ｂ社、Ｃ社方式と圧油出口の位置関係を示
す図。第４図はＡ社、Ｂ社、Ｃ社方式へ切換レバ
ーによつて切換えたときの入口油孔と出口油孔と
の関係図。第５図及び第６図はＢ社位置へ切換ス
プールを切換えた状態を示す。第７図及び第８図
はＣ社位置へ切換スプールを切換た状態を示す。
第９図は従来技術が適用される油圧シヨベルの全
体構成図。第１０図は各作業用操作レバーの操作
方向を示す説明図。第１１図はＸ社の仕様による
操作レバーの操作方向を示す説明図。第１２図は
同じくＹ社の仕様による操作レバーの操作方向の
説明図。第１３図は同じくＺ社の仕様による操作
レバーの操作方向を示す説明図。図において；１…下部走行体、２…上部旋回体
、３…作業装置、４…ブーム、５…アーム、６…
バケツト、７…ブームシリンダ、８…アームシリ
ンダ、９…バケツトシリンダ、１０…旋回モータ
、１１，１２…作業用操作レバー、２１…パイロ
ツト弁、２２…切換弁、２３…バルブケーシング
、２４…切換スプール、２５…スプール挿入孔、
２６…切換レバー、イ′，ロ′，ハ′，ニ′，ホ
′，ヘ′，ト′，チ′（バルブケーシングへの）
入口油孔、２７…アーム開用出口油孔、２８…ア
ーム上用出口油孔、２９…バケツト閉用出口油孔
、３０…旋回右用出口油孔、３１…アーム閉用出
口油孔、３２…旋回左用出口油孔、３３…バケツ
ト開用出口油孔、３４…ブーム下用出口油孔、３
５〜４３（スプールの）周溝、４４，４５，４６
…ストツパー係合孔、４７…ストツパー、４８ａ
，４８ｂ…シール部材、４９，５０，５１，５２
，５３，５４…（バルブケーシング内の）通孔、
５５…エアブリーザ。 FIG. 1 is a cross-sectional view of the switching valve according to the present invention;
In particular, it shows the state of switching to Company A's method. Figure 2 is also a vertical cross-sectional view. FIG. 3 is a diagram showing the positional relationship between the A, B, and C types of pilot valves and the pressure oil outlet. FIG. 4 is a diagram showing the relationship between the inlet oil hole and the outlet oil hole when switching to the Company A, Company B, and Company C systems using the switching lever. FIGS. 5 and 6 show the state in which the switching spool has been switched to the Company B position. FIGS. 7 and 8 show the state in which the switching spool has been switched to the position of company C.
FIG. 9 is an overall configuration diagram of a hydraulic excavator to which the prior art is applied. FIG. 10 is an explanatory diagram showing the operating direction of each work operating lever. FIG. 11 is an explanatory diagram showing the operating direction of the operating lever according to the specifications of Company X. FIG. 12 is an explanatory diagram of the operating direction of the operating lever according to the specifications of company Y. FIG. 13 is an explanatory diagram showing the operating direction of the operating lever according to the specifications of Company Z. In the figure: 1... lower traveling body, 2... upper revolving body, 3... working device, 4... boom, 5... arm, 6...
Bucket, 7...Boom cylinder, 8...Arm cylinder, 9...Bucket cylinder, 10...Swivel motor, 11, 12...Work operation lever, 21...Pilot valve, 22...Switching valve, 23...Valve casing, 24...Switching Spool, 25...spool insertion hole,
26...Switching lever, A', B', C', D', E', H', G', G' (to valve casing)
Inlet oil hole, 27... Outlet oil hole for arm opening, 28... Outlet oil hole for arm top, 29... Outlet oil hole for bucket closing, 30... Outlet oil hole for turning right, 31... Outlet oil hole for arm closing, 32 ... Outlet oil hole for turning left, 33... Outlet oil hole for bucket opening, 34... Outlet oil hole for lower boom, 3
5-43 (spool) circumferential groove, 44, 45, 46
...stopper engagement hole, 47...stopper, 48a
, 48b...Seal member, 49, 50, 51, 52
, 53, 54... (in the valve casing) through hole,
55...Air breather.

Claims

[Scope of utility model registration request]

A plurality of actuators, a main direction switching valve (control valve) for controlling the driving direction of each actuator, a pilot valve operated by an operating lever for controlling the main direction switching valve, and a pilot valve and a main direction switching valve. In an operating type hydraulic circuit consisting of pilot piping connecting a pilot valve, a switching valve is provided in the middle of the piping between the pilot valve and the main directional switching valve, and the switching valve has a prismatic shape, with the pilot valve on at least one side. It has an inlet oil hole corresponding to the pressure oil discharge port of the control valve, and an outlet oil hole to the control valve on at least one other side, and a switching spool in the center that can be shifted to three positions in the axial direction by a switching lever. The inlet oil hole of the valve casing and the circumferential groove of the switching spool, and the circumferential groove of the switching spool and the outlet oil hole of the valve casing can be connected directly or through a through hole, thereby enabling mutual switching of a plurality of operation methods. A pilot operation hydraulic circuit characterized by making it possible.