JPS6212002U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の第１の実施例を装備した自
走式作業車における油圧回路を示す回路図、第２
図は同実施例要部の具体構造を示す一部展開縦断
面図、第３図は第１の実施例の作用を説明するた
めの模式的なグラフ、第４図は上記した自走式作
業車の概略側面図、第５図はこの考案の第２の実
施例を装備した自走式作業車における油圧回路を
示す回路図、第６図は第２の実施例の作用を説明
するための模式的なグラフ、第７図ａ，ｂはそれ
ぞれ、本考案が解決しようとした問題点の一つを
説明するための模式的断面図である。 １……パワーステアリング機構、２……油圧リ
フト装置、３……油圧ポンプ、４……吐出回路、
５……流量一定形流量調整弁、５ａ……リリーフ
弁、５ｂ……絞り、５ｃ……弁ばね、６……調整
流回路、７……パワーシリンダ、８……余剰流回
路、９……リフトシリンダ、１０……他の流量一
定形流量調整弁、１０ａ……リリーフ弁、１０ｂ
……絞り、１０ｃ……弁ばね、１１……余剰流回
路、１２……調整流回路。 Figure 1 is a circuit diagram showing a hydraulic circuit in a self-propelled work vehicle equipped with the first embodiment of this invention;
The figure is a partially expanded vertical sectional view showing the specific structure of the main part of the same embodiment, Figure 3 is a schematic graph for explaining the operation of the first embodiment, and Figure 4 is the self-propelled work mentioned above. A schematic side view of the vehicle, FIG. 5 is a circuit diagram showing a hydraulic circuit in a self-propelled work vehicle equipped with the second embodiment of this invention, and FIG. 6 is a diagram for explaining the operation of the second embodiment. The schematic graphs in FIGS. 7a and 7b are schematic cross-sectional views for explaining one of the problems that the present invention attempts to solve. 1...Power steering mechanism, 2...Hydraulic lift device, 3...Hydraulic pump, 4...Discharge circuit,
5... Constant flow rate flow regulating valve, 5a... Relief valve, 5b... Throttle, 5c... Valve spring, 6... Regulating flow circuit, 7... Power cylinder, 8... Surplus flow circuit, 9... Lift cylinder, 10...Other constant flow rate regulating valve, 10a...Relief valve, 10b
... Throttle, 10c... Valve spring, 11... Surplus flow circuit, 12... Adjustment flow circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] パワーステアリング機構１と油圧リフト装置２
とを備えた自走式作業車において、単一の油圧ポ
ンプ３の吐出回路４に接続して流量一定形流量調
整弁５を設け、この流量調整弁５の調整流回路６
をパワーステアリング機構１のパワーシリンダ７
に対する油圧供給回路に、また該流量調整弁５の
余剰流回路８を油圧リフト装置２のリフトシリン
ダ９に対する油圧供給回路に、それぞれ構成して
ある油圧供給装置であつて、前記吐出回路４また
は前記調整流回路６に他の流量一定形流量調整弁
１０を挿入設置して、この他の流量一定形流量調
整弁１０の余剰流回路１１を介し前記した流量調
整弁５または前記パワーシリンダ７に対する油の
供給を行なうように構成すると共に、該他の流量
一定形流量調整弁１０の調整流回路１２を前記し
た流量調整弁５の余剰流回路８と共に前記リフト
シリンダ９に対し接続したことを特徴とする油圧
供給装置。 Power steering mechanism 1 and hydraulic lift device 2
In a self-propelled work vehicle equipped with a single hydraulic pump 3, a constant flow rate regulating valve 5 is connected to the discharge circuit 4 of the single hydraulic pump 3, and a regulating flow circuit 6 of the flow regulating valve 5 is provided.
The power cylinder 7 of the power steering mechanism 1
The hydraulic pressure supply device is configured such that the surplus flow circuit 8 of the flow rate regulating valve 5 is configured as a hydraulic pressure supply circuit for the lift cylinder 9 of the hydraulic lift device 2, and the surplus flow circuit 8 of the flow rate regulating valve 5 is configured as a hydraulic pressure supply circuit for the lift cylinder 9 of the hydraulic lift device 2. Another constant flow type flow rate adjustment valve 10 is inserted and installed in the regulated flow circuit 6, and oil is supplied to the aforementioned flow rate adjustment valve 5 or the power cylinder 7 through the surplus flow circuit 11 of the other constant flow rate type flow rate adjustment valve 10. , and the regulating flow circuit 12 of the other constant flow rate regulating valve 10 is connected to the lift cylinder 9 together with the surplus flow circuit 8 of the above-mentioned flow regulating valve 5. Hydraulic supply device.