JPS605303U

JPS605303U - Agricultural tractor hydraulic system

Info

Publication number: JPS605303U
Application number: JP9700583U
Authority: JP
Inventors: 入谷　啓文
Original assignee: 株式会社クボタ
Priority date: 1983-06-22
Filing date: 1983-06-22
Publication date: 1985-01-16

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面は本考案に係る農用トラクタの油圧装置の実施例を
示し、第１図は乗用型耕耘機の要部の斜視図、第２図は
油圧回路図、第３図はローリング制御機構の制御回路図
、第４図は要部の縦断側面図、第５図は第４図の■−Ｖ
線断面図である。３・・・・・・付設作業装置、７・・・・・・リフドナ
ームシリンダ、７ａ・・・・・・ピストンロッド、１０
・・・・・・フロープライオリティバルブ、１１・・・
・・・シリンダの制御弁、１４・・・・・・姿勢制御用
の制御弁、１８・・・・・・ミッションケース、１９・
・・・・・上蓋ケース、２０・・・・・・シリンダヘッ
ド、２１・・・・・・組付孔、Ａ・・・・・・姿勢自動
制御用油圧回路、ｆ・・・・・・油路。The drawings show an embodiment of the hydraulic system for an agricultural tractor according to the present invention, in which Fig. 1 is a perspective view of the main parts of a riding cultivator, Fig. 2 is a hydraulic circuit diagram, and Fig. 3 is a control circuit for a rolling control mechanism. Figure 4 is a longitudinal cross-sectional side view of the main part, Figure 5 is ■-V of Figure 4.
FIG. 3... Attached working device, 7... Rift nam cylinder, 7a... Piston rod, 10
...Flow priority valve, 11...
... Cylinder control valve, 14 ... Control valve for attitude control, 18 ... Mission case, 19.
...Top lid case, 20...Cylinder head, 21...Assembly hole, A...Hydraulic circuit for automatic attitude control, f... Oil road.

Claims

[Scope of Claim for Utility Model Registration] The piston rod 7a of the lift arm cylinder 7 for lifting the attached working device 3 is connected to the upper cover case 1 of the mission case 18.
At the same time, the cylinder head 20 of the cylinder 7 is detachably attached to the upper cover case 19, and a control valve 11 for the cylinder 7 is provided, and the cylinder head 20 of the cylinder 7 is disposed in the cylinder 7 so as to be movable. The control valve 14 of the hydraulic circuit A for automatic attitude control in the attached work device 3
A flow priority valve 10 is provided for distributing and distributing pressure oil from a hydraulic source in a fixed amount, and surplus oil from the flow priority valve 10 and return oil from the automatic attitude control hydraulic circuit A are combined to connect the lift arm to the lift arm. A hydraulic system for an agricultural tractor that is provided with a flow path for supplying a cylinder control valve 11, in which the flow priority valve 10 is connected to an assembly hole 21 provided in the cylinder head 20.
The oil passage 5 is fitted into and fixed to the cylinder head and connects the flow priority valve 10, both control valves 11, 14, and the cylinder 7 in communication with each other. Hydraulic system for an agricultural tractor, which has a hole at 20.