JPS6096479U - Hydraulic circuit of hydraulic machine with blade - Google Patents
Hydraulic circuit of hydraulic machine with bladeInfo
- Publication number
- JPS6096479U JPS6096479U JP18701883U JP18701883U JPS6096479U JP S6096479 U JPS6096479 U JP S6096479U JP 18701883 U JP18701883 U JP 18701883U JP 18701883 U JP18701883 U JP 18701883U JP S6096479 U JPS6096479 U JP S6096479U
- Authority
- JP
- Japan
- Prior art keywords
- travel
- hydraulic
- hydraulic pump
- circuit
- blade
- 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
- Operation Control Of Excavators (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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はブレード付油圧機械の一例として挙げたブレー
ド付油圧ショベルの概観を示す側面図、第２図は従来の
ブレード付油圧機械の油圧回路を示す回路図、第３図は
本考案のブレード付油圧機 、械の油圧回路の第１の
実施例を示す回路図、第４図は第３図に示す第１の実施
例に備えられるブレード用方向切換弁の別の例を示す説
明図、第５図は第３図に示す第１の実施例に備えられる
増速用方向切換弁の別の例を示す説明図、第６図は本考
案の第２の実施例を示す回路図である。Fig. 1 is a side view showing the general appearance of a hydraulic excavator with a blade as an example of a hydraulic machine with a blade, Fig. 2 is a circuit diagram showing the hydraulic circuit of a conventional hydraulic machine with a blade, and Fig. 3 is a blade of the present invention. FIG. 4 is an explanatory diagram showing another example of the blade directional control valve provided in the first embodiment shown in FIG. 3; FIG. 5 is an explanatory diagram showing another example of the speed increasing directional control valve provided in the first embodiment shown in FIG. 3, and FIG. 6 is a circuit diagram showing the second embodiment of the present invention. .
Claims (1)
出される圧油によって作動する第１の走行モータと、こ
の第１の走行モータを制御する第１の走行用方向切換弁
上を有し、左右走行回路のうちいずれか一方を形成する
第１の走行回路と、第２の油圧ポンプと、この第２の油
圧ポンプから吐出される圧油によって作動する第２の走
行モータと、この第２の走行モータを制御する第２の走
行用方向切換弁とを有し、左右走行回路のうちのいずれ
か他方を形成する第２の走行回路と、第３の油圧ポンプ
と、この第３の油圧ポンプから吐出される圧油によって
作動するブレード昇降用シリンダと、このブレード昇降
用シリンダを制御するブレード用方向切換用弁とを有す
るブレード用回路とを備えたブレード付油圧機械の油圧
回路において、上記第３の油圧ポンプと上記ブレード用
方向切換弁との間に、かつ該ブレード用方向切換弁と並
列に増速用方向切換弁を設けるとともに、第１の油圧ポ
ンプと第１の走行用方向切換弁とを連絡する経路と上記
増速用方向切換弁とを接続する第１の経路、および第２
の油圧ポンプと第２の飛行用方向切換弁とを連絡する経
路と上記増速用方向切換弁とを接続する第２の経路を設
けたことを特徴とするブレード付油圧機械の油圧回路。 ２ 増速用方向切換弁が、絞り通路を有するとともに、
□第１の油圧ポンプと第１の走行用方向切換弁とを連絡
する経路と上記絞り通路とを接続する第１の通路、およ
び第２の油圧ポンプと第２の走行用方向切換弁とを連絡
する経路と上記絞り通路とを接続する第２の通路とを設
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
載のブレード付油圧機械の油圧回路。 ３ ブレード用方向切換弁と増速用方向切換弁との同時
切換時における第１の走行回路および第２の走行回路と
、ブレード用回路の負荷圧をほぼ同等にする圧損付与手
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項または第２項記載のブレード付油圧機械の油圧回路
。[Claims for Utility Model Registration] 1. A first hydraulic pump, a first travel motor operated by pressure oil discharged from the first hydraulic pump, and a first travel motor that controls the first travel motor. A first travel circuit that has a travel direction switching valve and forms either one of the left and right travel circuits, a second hydraulic pump, and is operated by pressure oil discharged from the second hydraulic pump. a second travel circuit that has a second travel motor and a second travel direction switching valve that controls the second travel motor and forms the other of the left and right travel circuits; A blade circuit includes a hydraulic pump, a blade lifting cylinder operated by pressure oil discharged from the third hydraulic pump, and a blade direction switching valve for controlling the blade lifting cylinder. In the hydraulic circuit of the bladed hydraulic machine, a speed increasing directional switching valve is provided between the third hydraulic pump and the blade directional switching valve and in parallel with the blade directional switching valve; a first path connecting a path connecting the hydraulic pump and the first travel directional control valve and the speed increasing directional control valve; and a second path connecting the speed increasing directional control valve.
A hydraulic circuit for a bladed hydraulic machine, characterized in that a second path is provided for connecting the hydraulic pump and the second flight directional control valve and the speed increasing directional control valve. 2 The speed increasing directional switching valve has a throttle passage, and
□A first passage that connects the passage connecting the first hydraulic pump and the first travel directional control valve with the throttle passage, and a second hydraulic pump and the second travel directional control valve. A hydraulic circuit for a bladed hydraulic machine according to claim 1, characterized in that a second passage connecting the communicating passage and the throttle passage is provided. 3. Providing a pressure loss applying means that makes the load pressures of the first running circuit and the second running circuit and the blade circuit almost equal when the blade directional switching valve and the speed increasing directional switching valve are switched simultaneously. A hydraulic circuit for a bladed hydraulic machine according to claim 1 or 2 of the utility model registration claim, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18701883U JPS6096479U (en) | 1983-12-05 | 1983-12-05 | Hydraulic circuit of hydraulic machine with blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18701883U JPS6096479U (en) | 1983-12-05 | 1983-12-05 | Hydraulic circuit of hydraulic machine with blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6096479U true JPS6096479U (en) | 1985-07-01 |
Family
ID=30403799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18701883U Pending JPS6096479U (en) | 1983-12-05 | 1983-12-05 | Hydraulic circuit of hydraulic machine with blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6096479U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105661U (en) * | 1987-12-28 | 1989-07-17 | ||
| JP2017075668A (en) * | 2015-10-16 | 2017-04-20 | ナブテスコ株式会社 | Hydraulic transmission |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5519302A (en) * | 1978-07-10 | 1980-02-12 | Hitachi Constr Mach Co Ltd | Hydraulic pressure line in hydraulic shovel |
-
1983
- 1983-12-05 JP JP18701883U patent/JPS6096479U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5519302A (en) * | 1978-07-10 | 1980-02-12 | Hitachi Constr Mach Co Ltd | Hydraulic pressure line in hydraulic shovel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105661U (en) * | 1987-12-28 | 1989-07-17 | ||
| JP2017075668A (en) * | 2015-10-16 | 2017-04-20 | ナブテスコ株式会社 | Hydraulic transmission |
| KR20170045121A (en) * | 2015-10-16 | 2017-04-26 | 나부테스코 가부시키가이샤 | Hydraulic operating apparatus |
| CN106593967A (en) * | 2015-10-16 | 2017-04-26 | 纳博特斯克有限公司 | Hydraulic drive device |
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