JPH0365769U - - Google Patents
Info
- Publication number
- JPH0365769U JPH0365769U JP12796389U JP12796389U JPH0365769U JP H0365769 U JPH0365769 U JP H0365769U JP 12796389 U JP12796389 U JP 12796389U JP 12796389 U JP12796389 U JP 12796389U JP H0365769 U JPH0365769 U JP H0365769U
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- regulator
- pilot pressure
- discharge flow
- maximum discharge
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図はこの考案にかかる走行速度の制限回路
図、第２図は油圧ポンプのＰ−Ｑ曲線図、第３図
は油圧シヨベルの側面図、第４図は従来技術の油
圧回路図である。
２，３……走行モータ、５……作業装置、１８
……エンジン、１９，２０……第１、第２ポンプ
、２１，２２……レギユレータ、３３，３４，３
５……検出器、３６……コントローラ、３７……
電磁器換弁、３９……モードスイツチ、４０……
パイロツト油圧源。
Figure 1 is a traveling speed limiting circuit diagram according to this invention, Figure 2 is a P-Q curve diagram of a hydraulic pump, Figure 3 is a side view of a hydraulic excavator, and Figure 4 is a hydraulic circuit diagram of a conventional technology. . 2, 3...Travel motor, 5...Work device, 18
...Engine, 19,20...First and second pumps, 21,22...Regulator, 33,34,3
5...Detector, 36...Controller, 37...
Solenoid switching valve, 39...Mode switch, 40...
Pilot hydraulic power source.
Claims (1)
ギユレータにパイロツト圧を作用せしめ、上記油
圧ポンプの最大吐出流量を制限するようにした油
圧回路において、走行モータが作動状態であるこ
とと、作業装置が作動状態であることをそれぞれ
検出する検出手段を設け、その検出手段により出
力される信号をコントローラに入力するようにし
、またレギユレータの最大吐出流量制限用ポート
にパイロツト圧を作用可能に電磁切換弁を設け、
一方、作業時の走行モードを選択できるモードス
イツチを設け、そのモードスイツチの操作時に走
行を行うとき上記コントローラにより電磁切換弁
を介してパイロツト圧をレギユレータの最大吐出
流量制限用ポートに作用するように構成したこと
を特徴とする走行速度の制限回路。 In a hydraulic circuit that applies pilot pressure to the regulator of a variable displacement hydraulic pump installed on construction machinery to limit the maximum discharge flow rate of the hydraulic pump, it is determined that the travel motor is in operation and that the work equipment is in operation. A detection means is provided to detect each state, and a signal outputted by the detection means is inputted to the controller, and an electromagnetic switching valve is provided to enable pilot pressure to be applied to the maximum discharge flow rate limiting port of the regulator. ,
On the other hand, a mode switch is provided to select the travel mode during work, and when the mode switch is operated, the controller causes the pilot pressure to be applied to the maximum discharge flow rate limiting port of the regulator via the electromagnetic switching valve. A traveling speed limiting circuit characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989127963U JPH086837Y2 (en) | 1989-10-31 | 1989-10-31 | Travel speed limit circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989127963U JPH086837Y2 (en) | 1989-10-31 | 1989-10-31 | Travel speed limit circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0365769U true JPH0365769U (en) | 1991-06-26 |
| JPH086837Y2 JPH086837Y2 (en) | 1996-02-28 |
Family
ID=31675696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989127963U Expired - Lifetime JPH086837Y2 (en) | 1989-10-31 | 1989-10-31 | Travel speed limit circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH086837Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019049603A1 (en) * | 2017-09-07 | 2019-03-14 | 日立建機株式会社 | HYDRAULIC WORKING MACHINE |
| WO2019189935A1 (en) * | 2018-03-31 | 2019-10-03 | 住友建機株式会社 | Shovel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62160333A (en) * | 1986-01-08 | 1987-07-16 | Hitachi Constr Mach Co Ltd | Controller for engine and oil-pressure pump |
| JPH01119456U (en) * | 1988-01-28 | 1989-08-14 |
-
1989
- 1989-10-31 JP JP1989127963U patent/JPH086837Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62160333A (en) * | 1986-01-08 | 1987-07-16 | Hitachi Constr Mach Co Ltd | Controller for engine and oil-pressure pump |
| JPH01119456U (en) * | 1988-01-28 | 1989-08-14 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019049603A1 (en) * | 2017-09-07 | 2019-03-14 | 日立建機株式会社 | HYDRAULIC WORKING MACHINE |
| US11274418B2 (en) | 2017-09-07 | 2022-03-15 | Hitachi Construction Machinery Co., Ltd. | Hydraulic work machine |
| WO2019189935A1 (en) * | 2018-03-31 | 2019-10-03 | 住友建機株式会社 | Shovel |
| JPWO2019189935A1 (en) * | 2018-03-31 | 2021-03-25 | 住友建機株式会社 | Excavator |
| US12018461B2 (en) | 2018-03-31 | 2024-06-25 | Sumitomo Construction Machinery Co., Ltd. | Shovel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH086837Y2 (en) | 1996-02-28 |
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