JPS62185762U - - Google Patents
Info
- Publication number
- JPS62185762U JPS62185762U JP7395386U JP7395386U JPS62185762U JP S62185762 U JPS62185762 U JP S62185762U JP 7395386 U JP7395386 U JP 7395386U JP 7395386 U JP7395386 U JP 7395386U JP S62185762 U JPS62185762 U JP S62185762U
- Authority
- JP
- Japan
- Prior art keywords
- actuator
- hydraulic pump
- hydraulic
- connection mode
- travel
- 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
- 238000010276 construction Methods 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 2
Description
図は本考案の土木建設機械の油圧駆動装置の一
実施例を示す図である。
４……第１の油圧ポンプ、６……第２の油圧ポ
ンプ、２４……旋回用方向切換弁、２６……第１
のブーム用方向切換弁、２８……第１のアーム用
方向切換弁、３０……第１のバケツト用方向切換
弁、３２……左走行用方向切換弁、３８……右走
行用方向切換弁、４０……第２のアーム用方向切
換弁、４２……第２のバケツト用方向切換弁、４
４……第２のブーム用方向切換弁、５０……ブー
ムシリンダ、５２……アームシリンダ、５６……
左走行モータ（左走行用アクチユエータ）、５８
……右走行モータ（右走行用アクチユエータ）、
６４……切換弁、６５，８０，８１……管路、７
０……パイロツト油圧ポンプ、７２……切換弁（
防止手段）、７４……切換弁（容量減少手段）、
７６，７８……傾転操作用シリンダ。
The figure shows an embodiment of the hydraulic drive device for civil engineering construction machinery of the present invention. 4...First hydraulic pump, 6...Second hydraulic pump, 24...Swivel directional control valve, 26...First
28... Directional switching valve for the first arm, 30... First bucket directional switching valve, 32... Directional switching valve for left travel, 38... Directional switching valve for right travel. , 40...Second arm directional switching valve, 42...Second bucket directional switching valve, 4
4...Second boom directional control valve, 50...Boom cylinder, 52...Arm cylinder, 56...
Left travel motor (left travel actuator), 58
...Right travel motor (right travel actuator),
64...Switching valve, 65, 80, 81...Pipeline, 7
0...Pilot hydraulic pump, 72...Switching valve (
prevention means), 74... switching valve (capacity reduction means),
76, 78...Cylinder for tilting operation.
Claims (1)
も第１の油圧回路および第２の油圧回路を含み、
上記第１の油圧回路は、第１の油圧ポンプと、こ
の第１の油圧ポンプから対応するアクチユエータ
への圧油の流れをそれぞれ制御する複数の方向切
換弁を含む第１の弁グループを有し、上記第２の
油圧回路は、第２の油圧ポンプと、この第２の油
圧ポンプから対応するアクチユエータへの圧油の
流れをそれぞれ制御する複数の方向切換弁を含む
第２の弁グループとを有し、上記複数のアクチユ
エータは少なくとも左走行用アクチユエータおよ
び右走行用アクチユエータと、ブーム用アクチユ
エータと、アーム用アクチユエータと、旋回用ア
クチユエータとを含み、上記左走行用アクチユエ
ータおよび右走行用アクチユエータが上記第１の
油圧ポンプおよび第２の油圧ポンプのそれぞれに
接続される第１の接続形態と、上記左走行用アク
チユエータおよび右走行用アクチユエータが上記
第１の油圧ポンプおよび第２の油圧ポンプのうち
の一方のみに接続される第２の接続形態とのいず
れかに切換える接続形態切換手段とを備えた土木
建設機械の油圧駆動装置において、上記左走行用
アクチユエータおよび右走行用アクチユエータが
可変容量型アクチユエータから成るとともに、上
記第２の接続形態のとき、上記左走行用アクチユ
エータおよび右走行用アクチユエータの容量を、
上記第１の接続形態のときの容量に比べて減少さ
せる容量減少手段を設けたことを特徴とする土木
建設機械の油圧駆動装置。 (2) 左走行用アクチユエータおよび右走行用ア
クチユエータの容量の減少を防止する防止手段を
設けたことを特徴とする実用新案登録請求の範囲
第(1)項記載の土木建設機械の油圧駆動装置。[Claims for Utility Model Registration] (1) At least a first hydraulic circuit and a second hydraulic circuit that drive a plurality of actuators;
The first hydraulic circuit includes a first hydraulic pump and a first valve group including a plurality of directional valves each controlling the flow of pressure oil from the first hydraulic pump to a corresponding actuator. , the second hydraulic circuit includes a second hydraulic pump and a second valve group including a plurality of directional valves each controlling a flow of pressure oil from the second hydraulic pump to a corresponding actuator. The plurality of actuators include at least a left travel actuator, a right travel actuator, a boom actuator, an arm actuator, and a swing actuator, and the left travel actuator and the right travel actuator are the same as the left travel actuator and the right travel actuator. a first connection form connected to each of the first hydraulic pump and the second hydraulic pump; and the left travel actuator and the right travel actuator are connected to one of the first hydraulic pump and the second hydraulic pump. In the hydraulic drive system for civil engineering construction machinery, the hydraulic drive system for civil engineering and construction machinery is provided with a connection mode switching means for switching between a second connection mode connected only to a second connection mode, and a second connection mode connected only to In addition, in the second connection mode, the capacities of the left travel actuator and right travel actuator are:
A hydraulic drive device for civil engineering and construction machinery, characterized in that it is provided with capacity reducing means for reducing the capacity compared to the capacity in the first connection mode. (2) The hydraulic drive device for civil engineering and construction machinery as set forth in claim (1) of the utility model registration, characterized in that it is provided with a prevention means for preventing a reduction in capacity of the actuator for left-hand travel and the actuator for right-hand travel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7395386U JPH0439878Y2 (en) | 1986-05-19 | 1986-05-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7395386U JPH0439878Y2 (en) | 1986-05-19 | 1986-05-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62185762U true JPS62185762U (en) | 1987-11-26 |
| JPH0439878Y2 JPH0439878Y2 (en) | 1992-09-18 |
Family
ID=30918743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7395386U Expired JPH0439878Y2 (en) | 1986-05-19 | 1986-05-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0439878Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014507609A (en) * | 2010-12-27 | 2014-03-27 | ボルボ コンストラクション イクイップメント アーベー | Travel control system for construction machinery |
-
1986
- 1986-05-19 JP JP7395386U patent/JPH0439878Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014507609A (en) * | 2010-12-27 | 2014-03-27 | ボルボ コンストラクション イクイップメント アーベー | Travel control system for construction machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0439878Y2 (en) | 1992-09-18 |
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