JPS6088102U - Hydraulic control device for cargo handling vehicles - Google Patents
Hydraulic control device for cargo handling vehiclesInfo
- Publication number
- JPS6088102U JPS6088102U JP18044483U JP18044483U JPS6088102U JP S6088102 U JPS6088102 U JP S6088102U JP 18044483 U JP18044483 U JP 18044483U JP 18044483 U JP18044483 U JP 18044483U JP S6088102 U JPS6088102 U JP S6088102U
- Authority
- JP
- Japan
- Prior art keywords
- diversion
- switch
- cargo handling
- power steering
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Forklifts And Lifting Vehicles (AREA)
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
第１図は従来装置の油圧回路図、第２図はこの考案を具
体化した第一の実施例を示す油圧回路図、第３図は第二
の実施例を示す油圧回路図である。
油圧ポンプ・・・１１、オイルタンク・・・１３、ソレ
ノイド弁・・・１５、分流弁・・・１６．１７、パワー
ステアリング用制御弁・・・２０、圧力スイッチ・・・
２６、作業機操作レバー・・・２７、作業機操作用制御
弁・・・２８、スプール・・・２９、係合溝・・・３０
、リミットスイッチ・・・δ。FIG. 1 is a hydraulic circuit diagram of a conventional device, FIG. 2 is a hydraulic circuit diagram showing a first embodiment of this invention, and FIG. 3 is a hydraulic circuit diagram showing a second embodiment. Hydraulic pump...11, Oil tank...13, Solenoid valve...15, Diversion valve...16.17, Power steering control valve...20, Pressure switch...
26, Work equipment operating lever...27, Work equipment operating control valve...28, Spool...29, Engagement groove...30
, limit switch...δ.
Claims (1)
ーステアリング系回路と作業機系回路とに分流して前記
両回路の作動油として使用する荷役車両の油圧制御装置
において、パワーステアリング系回路への分流量の異な
る２個の分流弁を設けるとともに油圧ポンプからのオイ
ルの流路を前記両分流弁のいずれか一方と連通ずるよう
に切換えるソレノイド弁を設け、ステアリングホイール
又は作業機操作レバーの操作に連動して前記ソレノイド
弁に作動信号を発するスイッチを設けたことを特徴とす
る荷役車両の油圧制御装置。 ２ 前記スイッチはステアリング用制御弁と前記両分流
弁とを連結する管路に設けられ、ステアリングホイール
操作にともなう圧力変動を検知して前記ソレノイド弁を
油圧ポンプからのオイルの流路がパワーステアリング系
回路への分流量が多い一方の分流弁と連通ずる側へ作動
させる信号を発する圧力スイッチである実用新案登録請
求の範囲第１項に記載の荷役車両の油圧制御装置。 ３ 前記スイッチは作業機操作レバーの操作により往復
動される制御弁のスプールに形成された保合溝にそのア
クチュエータが係合し前記操作レバーを作動位置に操作
した際に前記ソレノイド弁を油圧ポンプからのオイルの
流路がパワーステアリング系回路への分流量が少い他方
の分流弁と連通ずる側へ作動させる信号を発するリミッ
トスイッチである実用新案登録請求の範囲第１項に記載
の荷役車両の油圧制御装置。[Claims for Utility Model Registration] 1. A hydraulic control system for a cargo handling vehicle in which oil sent from a hydraulic pump is divided into a power steering system circuit and a work equipment system circuit by a diversion valve and used as hydraulic fluid for both circuits, Two diversion valves with different amounts of diversion to the power steering system circuit are provided, and a solenoid valve is provided to switch the oil flow path from the hydraulic pump to communicate with either of the two diversion valves, and the steering wheel or work A hydraulic control device for a cargo handling vehicle, comprising a switch that issues an activation signal to the solenoid valve in conjunction with the operation of a machine control lever. 2. The switch is installed in a conduit that connects the steering control valve and the two flow divider valves, and detects pressure fluctuations caused by steering wheel operation to connect the solenoid valve to the power steering system. The hydraulic control device for a cargo handling vehicle according to claim 1, which is a pressure switch that emits a signal to operate the side that communicates with one of the diversion valves that has a larger amount of diversion to the circuit. 3. The switch has an actuator that engages with a locking groove formed in a spool of a control valve that is reciprocated by operation of a work equipment operating lever, and when the operating lever is operated to an operating position, the solenoid valve is operated by a hydraulic pump. The cargo handling vehicle according to claim 1, which is a limit switch that emits a signal to operate the oil flow path to the power steering system circuit where the flow path of the oil is communicated with the other diversion valve that has a small amount of diversion to the power steering system circuit. Hydraulic control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18044483U JPS6088102U (en) | 1983-11-22 | 1983-11-22 | Hydraulic control device for cargo handling vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18044483U JPS6088102U (en) | 1983-11-22 | 1983-11-22 | Hydraulic control device for cargo handling vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6088102U true JPS6088102U (en) | 1985-06-17 |
Family
ID=30391250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18044483U Pending JPS6088102U (en) | 1983-11-22 | 1983-11-22 | Hydraulic control device for cargo handling vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6088102U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62196300A (en) * | 1986-02-21 | 1987-08-29 | 小松フオ−クリフト株式会社 | Hydraulic circuit for cargo-handling car |
| WO2020067053A1 (en) * | 2018-09-28 | 2020-04-02 | 日立建機株式会社 | Work vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS505932A (en) * | 1973-05-21 | 1975-01-22 |
-
1983
- 1983-11-22 JP JP18044483U patent/JPS6088102U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS505932A (en) * | 1973-05-21 | 1975-01-22 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62196300A (en) * | 1986-02-21 | 1987-08-29 | 小松フオ−クリフト株式会社 | Hydraulic circuit for cargo-handling car |
| WO2020067053A1 (en) * | 2018-09-28 | 2020-04-02 | 日立建機株式会社 | Work vehicle |
| JP2020051194A (en) * | 2018-09-28 | 2020-04-02 | 日立建機株式会社 | Work vehicle |
| US11572674B2 (en) | 2018-09-28 | 2023-02-07 | Hitachi Construction Machinery Co., Ltd. | Working vehicle |
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