JPS59175312U

JPS59175312U - Agricultural tractor hydraulic system

Info

Publication number: JPS59175312U
Application number: JP7079683U
Authority: JP
Inventors: 和彦矢野
Original assignee: 株式会社　神崎高級工機製作所
Priority date: 1983-05-11
Filing date: 1983-05-11
Publication date: 1984-11-22

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]

第１図は農用トラクターの油圧装置部分の側面図、第２
図は同じ（ステアリングハンドル部分の平面図、第３図
は同じく側面図、第４図は作業機のうちロータリー耕耘
装置の側面図、第５図は本件考案の油圧回路図、第６図
は制御線図である。１・・・・・・位置設定レバー、２・・・・・・自動制
御域設定レバー、３・・・・・・ポジションコントロー
ルセンサー、４・・・・・・リフトアーム、６・・・・
・・リアカバー、９・・・・・・デプスコントロールセ
ンサー、２１・・・・・・油圧シリンダー、■・・・・
・・油圧制御弁、１６．１７・・・・・・電磁弁、１９
・・・・・・スローリターンバルブ、２４・・・・・・
絞り弁。Figure 1 is a side view of the hydraulic system part of an agricultural tractor, Figure 2
The figures are the same (a plan view of the steering handle part, Fig. 3 is a side view of the same, Fig. 4 is a side view of the rotary tilling device of the work machine, Fig. 5 is a hydraulic circuit diagram of the invention, and Fig. 6 is a control It is a line diagram. 1... Position setting lever, 2... Automatic control area setting lever, 3... Position control sensor, 4... Lift arm, 6...
...Rear cover, 9...Depth control sensor, 21...Hydraulic cylinder, ■...
... Hydraulic control valve, 16.17 ... Solenoid valve, 19
・・・・・・Slow return valve, 24・・・・・・
Throttle valve.

Claims

[Scope of Claim for Utility Model Registration] An automatic lifting/lowering control device for a working machine installed on an agricultural tractor includes a position setting lever that sets a desired position by an operator's operation, and a sensor that detects the current position of the working machine. In a mechanism that controls the set value of the position setting lever and the feedback value of the sensor to be 0, the difference between the feedback value and the set value is defined as an automatic control range between O and a constant value. An agricultural tractor hydraulic system characterized by restricting the flow rate of the cylinder. (2) The hydraulic system for an agricultural tractor according to claim 1, which is characterized by being provided with an automatic control range setting lever that changes the automatic control range. (3) The hydraulic system for an agricultural tractor according to claim 1, which is a registered utility model, characterized in that two sensors, a position control sensor and a depth control sensor, are arranged side by side and can be switched by a changeover switch. (4) Scope of Claim 3 for Utility Model Registration, which is characterized in that a position cost roll sensor is provided on the lift arm.
Hydraulic system for agricultural tractors as described in Section 1. (5) The hydraulic system for an agricultural tractor according to claim 3, characterized in that a depth control sensor is provided on the rear cover.