JPS5834886U - Control circuit for boom hoisting cylinder - Google Patents
Control circuit for boom hoisting cylinderInfo
- Publication number
- JPS5834886U JPS5834886U JP13051681U JP13051681U JPS5834886U JP S5834886 U JPS5834886 U JP S5834886U JP 13051681 U JP13051681 U JP 13051681U JP 13051681 U JP13051681 U JP 13051681U JP S5834886 U JPS5834886 U JP S5834886U
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- boom hoisting
- hoisting cylinder
- control circuit
- oil chamber
- 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
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はブーム起伏用シリンダ４とブーム３を、取付関
係を示す構成図、第２図はブーム起伏用シリンダの従来
例の制御回路、第３図は本考案の第１実施例の油圧回路
図、第４図は同第２実施例の油圧回路図である。Fig. 1 is a configuration diagram showing the attachment relationship between the boom hoisting cylinder 4 and the boom 3, Fig. 2 is a control circuit of a conventional example of the boom hoisting cylinder, and Fig. 3 is a hydraulic circuit of the first embodiment of the present invention. 4 are hydraulic circuit diagrams of the second embodiment.
Claims (1)
換弁との間の管路にパイロット圧作用時には順逆両方向
の作動油の流れを許容しパイロット圧非作用時には方向
切換弁からピストン側油室への作動油の流れのみを許容
する第１制御弁を介装し、同シリンダのロッド側油室と
方向切換弁との間の管路には方向切換弁からロッド側油
室への作動油の流れのみを許容するクランキング圧を低
く設定した第２制御弁とロッド側油室から方向切換弁へ
の作動油の流れのみを許容する第３制御弁を並列に介装
してなり、第１制御弁の７．クイロット管路を第２制御
弁と方向切換弁間の管路から導いてなることを特徴とす
るブーム起伏用シリンダの制御回路。 （２）第１制御弁はパイロット式チェック弁であること
を特徴とする実用新案登録請求の範囲第１項のブーム起
伏用シリンダの制御回路。 （３１第１制御弁は外部パイロット式カウンタバランス
弁であることを特徴とする実用新案登録請求の範囲第１
項のブーム起伏用シリンダの制御回路。 （４）第２制御弁はバネ付チェック弁であることを特徴
とする実用新案登録請求の範囲第２項及び ′第３項
のブーム起伏用シリンダの制御回路。[Claims for Utility Model Registration] (1) When pilot pressure is applied to the pipeline between the piston side oil chamber of the boom hoisting cylinder and the directional control valve, hydraulic oil is allowed to flow in both directions, and when pilot pressure is not applied, the flow of hydraulic oil is allowed. A first control valve that only allows the flow of hydraulic oil from the directional control valve to the piston side oil chamber is installed, and a pipe line between the rod side oil chamber of the cylinder and the directional control valve is connected from the directional control valve to the piston side oil chamber. A second control valve with a low cranking pressure that allows only the flow of hydraulic oil to the rod side oil chamber and a third control valve that only allows the flow of hydraulic oil from the rod side oil chamber to the directional control valve are arranged in parallel. 7 of the first control valve. A control circuit for a boom hoisting cylinder, characterized in that a quilot pipe is led from a pipe between a second control valve and a directional control valve. (2) The control circuit for a boom hoisting cylinder according to claim 1, wherein the first control valve is a pilot check valve. (31. The first control valve is an external pilot type counterbalance valve.)
Control circuit for boom hoisting cylinder. (4) The control circuit for a boom hoisting cylinder according to claims 2 and 3 of the utility model registration claim, wherein the second control valve is a spring-loaded check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13051681U JPS5834886U (en) | 1981-09-01 | 1981-09-01 | Control circuit for boom hoisting cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13051681U JPS5834886U (en) | 1981-09-01 | 1981-09-01 | Control circuit for boom hoisting cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5834886U true JPS5834886U (en) | 1983-03-07 |
Family
ID=29924140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13051681U Pending JPS5834886U (en) | 1981-09-01 | 1981-09-01 | Control circuit for boom hoisting cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5834886U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556765A (en) * | 1978-06-30 | 1980-01-18 | Omron Tateisi Electronics Co | Electromagnetic relay |
-
1981
- 1981-09-01 JP JP13051681U patent/JPS5834886U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556765A (en) * | 1978-06-30 | 1980-01-18 | Omron Tateisi Electronics Co | Electromagnetic relay |
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