JPH0169903U

JPH0169903U -

Info

Publication number: JPH0169903U
Application number: JP1987164767U
Authority: JP
Priority date: 1987-10-27
Filing date: 1987-10-27
Publication date: 1989-05-10
Anticipated expiration: 2002-10-27
Also published as: JPH0749051Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係る第１の実施例を示した油
圧配管の回路図、第２図は同じく第２の実施例を
示した部分回路図、第３図は同じく第３の実施例
を示した部分回路図、第４図はアタツチメントを
グラツプルフオークに適用する第４の実施例を示
したリフトアームとアタツチメントの側面図、第
５図は第４図の実施例を示した油圧配管の部分回
路図、第６図は本考案に係る油圧装置を制御する
電磁切換弁に接続するタイマー内蔵型リレーユニ
ツトの回路図、第７図はタイマー内蔵型リレーユ
ニツトの動作の状態を示すチヤート図である。第
８図は本考案を適用する一般的なトラクタの全体
図、第９図は、トラクタのアタツチメントを制御
するための従来の回路図である。１……トラクタ本体（作業機）、２……サイド
フレーム、３……リフトアーム、３ａ……基部、
３ｂ……先端部、３ｃ……中央部、４……アタツ
チメント、５……リフト用の複動シリンダ（リフ
トシリンダ）、６……ダンプ用の複動シリンダ（
ダンプシリンダ）、６ａ……ピストンロツド、７
……クランク、８……コンロツド、９……座席、
１０……レバー、１１……第１の切換弁、１２…
…第２の切換弁、１３……６ポート２位置型電磁
切換弁（電磁切換弁）、１４……タイマーユニツ
トを内蔵したリレーユニツト（タイマー内蔵型リ
レーユニツト）、１５……外部電源、１６……マ
スタースイツチ、２３……第２の実施例にかかる
６ポート２位置型電磁切換弁、３３……第３の実
施例にかかる６ポート２位置型電磁切換弁、４３
……第４の実施例にかかる８ポート３位置型電磁
切換弁。 Fig. 1 is a circuit diagram of hydraulic piping showing a first embodiment of the present invention, Fig. 2 is a partial circuit diagram also showing a second embodiment, and Fig. 3 is a circuit diagram of a hydraulic piping according to a third embodiment. FIG. 4 is a side view of the lift arm and attachment showing a fourth embodiment in which the attachment is applied to a grapple fork, and FIG. 5 is a hydraulic piping diagram showing the embodiment of FIG. 4. FIG. 6 is a circuit diagram of a relay unit with a built-in timer connected to an electromagnetic switching valve that controls the hydraulic system according to the present invention, and FIG. 7 is a chart diagram showing the operating state of the relay unit with a built-in timer. It is. FIG. 8 is an overall view of a general tractor to which the present invention is applied, and FIG. 9 is a conventional circuit diagram for controlling the attachment of the tractor. 1... Tractor main body (work machine), 2... Side frame, 3... Lift arm, 3a... Base,
3b...Tip, 3c...Center, 4...Attachment, 5...Double acting cylinder for lift (lift cylinder), 6...Double acting cylinder for dump (
dump cylinder), 6a... piston rod, 7
...Crank, 8...Conrod, 9...Seat,
10... Lever, 11... First switching valve, 12...
...Second switching valve, 13...6-port 2-position electromagnetic switching valve (electromagnetic switching valve), 14...Relay unit with built-in timer unit (relay unit with built-in timer), 15...External power supply, 16... ... Master switch, 23 ... 6-port 2-position electromagnetic switching valve according to the second embodiment, 33 ... 6-port 2-position electromagnetic switching valve according to the third embodiment, 43
...An 8-port 3-position electromagnetic switching valve according to a fourth embodiment.

Claims

[Scope of Claim for Utility Model Registration] In a hydraulic system for a work machine in which the attachment at the tip of a lift arm is controlled by a double-acting cylinder, a 6-port 2-position electromagnetic switching valve is installed in the middle of the hydraulic circuit of the double-acting cylinder. The 6-port 2-position solenoid switching valve is continuously switched by a relay unit with a built-in timer unit. A vibration device for an attachment of a working machine, characterized in that a switching valve is continuously operated to apply vibration to the attachment.