JPS6246801U - - Google Patents
Info
- Publication number
- JPS6246801U JPS6246801U JP13972085U JP13972085U JPS6246801U JP S6246801 U JPS6246801 U JP S6246801U JP 13972085 U JP13972085 U JP 13972085U JP 13972085 U JP13972085 U JP 13972085U JP S6246801 U JPS6246801 U JP S6246801U
- Authority
- JP
- Japan
- Prior art keywords
- boom
- detects
- pressure sensor
- elevating
- control 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
- 230000003028 elevating effect Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Lifting Devices For Agricultural Implements (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の実施例を示す油圧回路図、第
２図はバケツトの昇降を増速可能にした１例を示
す油圧回路図、第３図は増速バルブの取付けの１
例を示す一部断面側面図である。
１……油圧ポンプ、２……ブーム、３……ブー
ムシリンダ、８……ブーム用コントロールバルブ
、１０……ブーム用操作レバー、１２……送給油
路、１３……圧力センサ、１４……油路、１５…
…増速バルブ、１６，１７……スイツチ。
Fig. 1 is a hydraulic circuit diagram showing an embodiment of the present invention, Fig. 2 is a hydraulic circuit diagram showing an example in which the lifting speed of the bucket can be increased, and Fig. 3 is a hydraulic circuit diagram showing an example of the installation of the speed increasing valve.
FIG. 2 is a partially cross-sectional side view showing an example. DESCRIPTION OF SYMBOLS 1... Hydraulic pump, 2... Boom, 3... Boom cylinder, 8... Boom control valve, 10... Boom operation lever, 12... Oil supply path, 13... Pressure sensor, 14... Oil Road, 15...
... Speed-up valve, 16, 17... switch.
Claims (1)
１０を介してコントロールバルブ８で制御する作
業機のブーム昇降制御装置において、 前記操作レバー１０のブーム上昇操作を検出す
るスイツチ１６と、ブーム上昇時にブームシリン
ダ３に送給される油圧を検出してブーム負荷が軽
量であるときに作動する圧力センサ１３と、ブー
ム上昇時にコントロールバルブ８から戻される油
をコントロールバルブ８への送給油路１２に供給
する増速バルブ１５とを備えており、前記スイツ
チ１６がＯＮし且つ圧力センサ１３が軽負荷時の
圧力を検出したときに前記増速バルブ１５が作動
するように構成されていることを特徴とする作業
機のブーム昇降制御装置。[Claims for Utility Model Registration] In a boom elevating control device for a working machine in which a boom cylinder 3 for elevating a boom is controlled by a control valve 8 via an operating lever 10, a switch 16 detects a boom elevating operation of the operating lever 10. , a pressure sensor 13 that detects the hydraulic pressure sent to the boom cylinder 3 when the boom is raised and operates when the boom load is light, and a pressure sensor 13 that detects the hydraulic pressure sent to the boom cylinder 3 when the boom is raised, and a pressure sensor 13 that sends oil returned from the control valve 8 to the control valve 8 when the boom goes up. The speed increasing valve 15 is configured to operate when the switch 16 is turned on and the pressure sensor 13 detects pressure at a light load. A boom elevating control device for a work machine, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13972085U JPS6246801U (en) | 1985-09-11 | 1985-09-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13972085U JPS6246801U (en) | 1985-09-11 | 1985-09-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6246801U true JPS6246801U (en) | 1987-03-23 |
Family
ID=31045886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13972085U Pending JPS6246801U (en) | 1985-09-11 | 1985-09-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6246801U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994013959A1 (en) * | 1992-12-04 | 1994-06-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic regenerator |
| KR100473238B1 (en) * | 1997-12-26 | 2005-06-10 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Hydraulic system for construction machinery and its control method |
| JP2010210072A (en) * | 2009-03-12 | 2010-09-24 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic control system for working machine |
| JP2010230061A (en) * | 2009-03-26 | 2010-10-14 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic control circuit for construction machine |
-
1985
- 1985-09-11 JP JP13972085U patent/JPS6246801U/ja active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994013959A1 (en) * | 1992-12-04 | 1994-06-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic regenerator |
| US5442912A (en) * | 1992-12-04 | 1995-08-22 | Hitachi Construction Machinery Co., Ltd. | Hydraulic recovery device |
| JP3139769B2 (en) * | 1992-12-04 | 2001-03-05 | 日立建機株式会社 | Hydraulic regeneration device |
| KR100473238B1 (en) * | 1997-12-26 | 2005-06-10 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | Hydraulic system for construction machinery and its control method |
| JP2010210072A (en) * | 2009-03-12 | 2010-09-24 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic control system for working machine |
| JP2010230061A (en) * | 2009-03-26 | 2010-10-14 | Sumitomo (Shi) Construction Machinery Co Ltd | Hydraulic control circuit for construction machine |