JPS63188304U

JPS63188304U -

Info

Publication number: JPS63188304U
Application number: JP8030987U
Authority: JP
Priority date: 1987-05-27
Filing date: 1987-05-27
Publication date: 1988-12-02

Description

[Brief explanation of drawings]

図面は本考案に係る油圧操作装置に係る実施例
を示し、第１図は油圧回路図、第２図は操作状態
判定装置の横断面図、第３図は操作状態判定装置
の縦断面図、第４図は操作状態判定装置の斜視図
、第５図はブロツク図、第６図はドーザ付きバツ
クホウの側面図、第７図は別実施操作状態判定装
置の断面図である。第８図は従来の操作状態判定
装置の概略図である。１６……操作状態判定装置、２４……ケース、
２５……圧力スイツチ、２６……静圧室、２９，
Ｚ_１ないしＺ_８……スプリング、Ｓ_１ないしＳ_８……ピストン室、Ｂ_１ないしＢ_８……油圧ピスト
ン、Ｖ_３，Ｖ_６，Ｖ_７，Ｖ_８……コントロールバ
ルブ、ｌ_１ないしｌ_８……パイロツト操作油路、
Ａ_１ないしＡ_８……パイロツト操作弁。 The drawings show an embodiment of the hydraulic operating device according to the present invention, in which FIG. 1 is a hydraulic circuit diagram, FIG. 2 is a cross-sectional view of the operating state determining device, and FIG. 3 is a longitudinal sectional view of the operating state determining device. 4 is a perspective view of the operating state determining device, FIG. 5 is a block diagram, FIG. 6 is a side view of a backhoe with a dozer, and FIG. 7 is a sectional view of another operating state determining device. FIG. 8 is a schematic diagram of a conventional operation state determination device. 16...operation state determination device, 24...case,
25...Pressure switch, 26...Static pressure chamber, 29,
Z ₁ to Z ₈ ... Spring, S ₁ to S ₈ ... Piston chamber, B ₁ to B ₈ ... Hydraulic piston, V ₃ , V ₆ , V ₇ , V ₈ ... Control valve, L ₁ to L ₈ ... Pilot operation oil path,
_A1 to _A8 ...Pilot operating valve.

Claims

[Scope of utility model registration request]

Center bypass type control valve _V3 ,
A plurality of pilot operated valves (A ₁ to A ₈ ) are provided with a plurality of V ₆ , V ₇ , and V ₈ and each of the control valves V ₃ , V ₆ , V ₇ , and V ₈ is individually operated by pilot operating hydraulic pressure. and one pressure switch 25 for detecting whether all of the control valves V ₃ , V ₆ , V ₇ , V ₈ are in a neutral state or at least one is in an operating state. The hydraulic operating device is provided with a determination device 16, and the operation state determination device 16 includes the control valves V ₃ , V ₆ , V _{7 .} , V ₈ and the pilot operating valve (A ₁ to A ₈ ) A plurality of piston chambers (S ₁ to S ₈ ) formed in one case 24 are separately connected to a plurality of pilot operation oil passages (L 1 to L 8 ) that connect the pistons (S ₁ to S ₈ ) respectively, and pilot operation Hydraulically to one side and restoring spring (Z ₁ to Z ₈ or 29)
A hydraulic piston (B ₁ or... or B ₈ ) is provided in each of the piston chambers (S ₁ to S ₈ ), and as the hydraulic piston (B ₁ to B ₈ ) is pressed by the pilot operating pressure, A static pressure chamber 26 _, which increases the _pressure when A hydraulic operating device attached to the case 24.