JPH0289050U - - Google Patents
Info
- Publication number
- JPH0289050U JPH0289050U JP16650588U JP16650588U JPH0289050U JP H0289050 U JPH0289050 U JP H0289050U JP 16650588 U JP16650588 U JP 16650588U JP 16650588 U JP16650588 U JP 16650588U JP H0289050 U JPH0289050 U JP H0289050U
- Authority
- JP
- Japan
- Prior art keywords
- actuator
- hydraulic
- valve
- regenerative drive
- hydraulic circuit
- 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
- 230000001172 regenerating effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Description
第１図は本考案の第１実施例を示す図で、Ａは
油圧掘削機の回生駆動用油圧制御回路を示す図、
ＢはＡの油圧制御回路によつて制御される油圧掘
削機を示す図、第２図は従来の技術を示す図であ
る。
１…油圧ポンプ、２…アームシリンダ、３…ポ
ペツト型操作弁、４…アーム操作レバー、５…作
業機コントローラ、６，７…メータインポペツト
弁、８，９…メータアウトポペツト弁、６ａ〜９
ａ，１２ａ…パイロツト弁、６ｂ〜９ｂ，１２ｂ
…ソレノイド、１０…ブームシリンダ、１１…ポ
ペツト型操作弁、１２…回生用ポペツト弁、１３
…チエツク弁、１４，１５…油圧センサ、１６…
回生用コントローラ、１７…切り替えスイツチ、
１８…リレースイツチ、１９…マグネツト、２０
…ばね、２１…電源。
FIG. 1 is a diagram showing a first embodiment of the present invention, and A is a diagram showing a hydraulic control circuit for regenerative drive of a hydraulic excavator;
B is a diagram showing a hydraulic excavator controlled by the hydraulic control circuit of A, and FIG. 2 is a diagram showing a conventional technique. DESCRIPTION OF SYMBOLS 1...Hydraulic pump, 2...Arm cylinder, 3...Poppet type operation valve, 4...Arm operation lever, 5...Work machine controller, 6, 7...Meter in poppet valve, 8, 9...Meter out poppet valve, 6a~ 9
a, 12a...Pilot valve, 6b to 9b, 12b
...Solenoid, 10...Boom cylinder, 11...Poppet type operation valve, 12...Regeneration poppet valve, 13
...Check valve, 14, 15...Oil pressure sensor, 16...
Regeneration controller, 17... changeover switch,
18...Relay switch, 19...Magnet, 20
...Spring, 21...Power supply.
Claims (1)
と、該アクチユエータへの油量を制御するポペツ
ト型操作弁と、前記アクチユエータの回生駆動時
における戻り管路を、絞り弁及びチエツク弁を介
して前記油圧ポンプの吐出管路に接続したことを
特徴とする油圧掘削機の回生駆動用油圧回路。 (2) 前記第(1)の請求項において、油圧ポンプの
吐出圧と戻り管路の圧力との差圧に応じて絞り弁
の開度を制御し、且つ本来の出口側バルブを絞る
ようにしたことを特徴とする油圧掘削機の回生駆
動油圧回路。 (3) 前記第(1)の請求項において、アクチユエー
タの微操作時等アクチユエータの速度を増加させ
る必要のないときには絞り弁を完全閉止し、どち
らでも選択できるようにしたことを特徴とする回
生駆動油圧回路。[Scope of Claim for Utility Model Registration] (1) A hydraulic pump, a work equipment drive actuator, a poppet-type operating valve for controlling the amount of oil to the actuator, and a return pipe during regenerative drive of the actuator, including a throttle valve. A hydraulic circuit for regenerative drive of a hydraulic excavator, characterized in that the hydraulic circuit is connected to a discharge pipe of the hydraulic pump via a check valve and a check valve. (2) In claim (1), the opening degree of the throttle valve is controlled according to the differential pressure between the discharge pressure of the hydraulic pump and the pressure of the return line, and the original outlet side valve is throttled. A regenerative drive hydraulic circuit for a hydraulic excavator. (3) The regenerative drive according to claim (1), characterized in that the throttle valve is completely closed when there is no need to increase the speed of the actuator, such as during fine operation of the actuator, so that either can be selected. Hydraulic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16650588U JPH0289050U (en) | 1988-12-23 | 1988-12-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16650588U JPH0289050U (en) | 1988-12-23 | 1988-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0289050U true JPH0289050U (en) | 1990-07-13 |
Family
ID=31453947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16650588U Pending JPH0289050U (en) | 1988-12-23 | 1988-12-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0289050U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994013959A1 (en) * | 1992-12-04 | 1994-06-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic regenerator |
| WO2014054326A1 (en) * | 2012-10-03 | 2014-04-10 | 住友重機械工業株式会社 | Hydraulic circuit for construction machine |
-
1988
- 1988-12-23 JP JP16650588U patent/JPH0289050U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994013959A1 (en) * | 1992-12-04 | 1994-06-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic regenerator |
| WO2014054326A1 (en) * | 2012-10-03 | 2014-04-10 | 住友重機械工業株式会社 | Hydraulic circuit for construction machine |
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