JPS61191502U - - Google Patents
Info
- Publication number
- JPS61191502U JPS61191502U JP7597885U JP7597885U JPS61191502U JP S61191502 U JPS61191502 U JP S61191502U JP 7597885 U JP7597885 U JP 7597885U JP 7597885 U JP7597885 U JP 7597885U JP S61191502 U JPS61191502 U JP S61191502U
- Authority
- JP
- Japan
- Prior art keywords
- oil
- valve
- valve seat
- hydraulic
- oil passage
- 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
- 239000003921 oil Substances 0.000 claims 10
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図および第２図は本考案の実施例によるブ
レーキ弁を示し、第１図はその縦断面図、第２図
は第１図中に示す一方のチエツク弁の作動状態を
示す要部断面図、第３図ないし第５図は従来技術
に係り、第３図は油圧回路図、第４図は第３図中
に示すブレーキ弁の縦断面図、第５図は第４図中
に示す一方のチエツク弁の作動状態を示す要部断
面図である。
１…油圧モータ、２…慣性体、４…方向切換弁
、５…油圧ポンプ、６…タンク、７…カウンタバ
ランス弁、８Ａ，８Ｂ…チエツク弁、１０…ケー
シング、１２Ａ，１２Ｂ，１４Ａ，１４Ｂ，４１
Ａ，４１Ｂ，４２Ａ，４２Ｂ…油路、１５Ａ，１
５Ｂ，１６Ａ，１６Ｂ…油室、３１Ａ，３１Ｂ…
油通路、４３Ａ，４３Ｂ…弁座、４４Ａ，４４Ｂ
…油圧室、４６Ａ，４６Ｂ…ポペツト弁体、４８
Ａ，４８Ｂ…ばね、４９Ａ，４９Ｂ…連通路。
1 and 2 show a brake valve according to an embodiment of the present invention, FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is a sectional view of a main part showing the operating state of one of the check valves shown in FIG. 1. 3 to 5 relate to the prior art, FIG. 3 is a hydraulic circuit diagram, FIG. 4 is a vertical sectional view of the brake valve shown in FIG. 3, and FIG. 5 is shown in FIG. 4. FIG. 3 is a sectional view of a main part showing the operating state of one check valve. DESCRIPTION OF SYMBOLS 1...Hydraulic motor, 2...Inertial body, 4...Directional switching valve, 5...Hydraulic pump, 6...Tank, 7...Counter balance valve, 8A, 8B...Check valve, 10...Casing, 12A, 12B, 14A, 14B, 41
A, 41B, 42A, 42B...oil path, 15A, 1
5B, 16A, 16B...Oil chamber, 31A, 31B...
Oil passage, 43A, 43B...Valve seat, 44A, 44B
...Hydraulic chamber, 46A, 46B...Poppet valve body, 48
A, 48B...Spring, 49A, 49B...Communication path.
Claims (1)
れぞれ一端がアクチユエータ側と接続され、他端
が油圧源側と接続される一対の油通路と、該各油
通路の途中に設けられたカウンタバランス弁と、
前記油通路の途中に設けられ、前記油圧源側から
アクチユエータ側に向けて作動油の流通を許す一
対のチエツク弁とからなるブレーキ弁において、
前記各チエツク弁を、前記各油通路の途中に設け
られた弁座と、該弁座よりも油圧源側寄りに位置
して、該弁座に対向して開口するように前記ケー
シングに設けられた油圧室と、該油圧室に摺動可
能に挿嵌され、前記弁座に離着座することにより
、前記各油通路を油圧源側油路とアクチユエータ
側油路とに画成するポペツト弁体と、該ポペツト
弁体を前記弁座方向に付勢するばねと、前記油圧
室を前記アクチユエータ側油路と恒常的に連通さ
せる連通路とから構成したことを特徴とするブレ
ーキ弁。 a casing, a pair of oil passages provided within the casing, each having one end connected to an actuator side and the other end connected to a hydraulic power source side, and a counterbalance valve provided in the middle of each oil passage;
A brake valve comprising a pair of check valves provided in the middle of the oil passage and allowing flow of hydraulic oil from the oil pressure source side toward the actuator side,
Each of the check valves is provided with a valve seat provided in the middle of each of the oil passages, and provided in the casing so as to be located closer to the oil pressure source side than the valve seat and open opposite the valve seat. a poppet valve body that is slidably inserted into the hydraulic chamber and separates and seats on the valve seat to define each of the oil passages into a hydraulic source side oil passage and an actuator side oil passage. A brake valve comprising: a spring that biases the poppet valve element toward the valve seat; and a communication passage that permanently communicates the hydraulic chamber with the actuator side oil passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985075978U JPH0419203Y2 (en) | 1985-05-22 | 1985-05-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985075978U JPH0419203Y2 (en) | 1985-05-22 | 1985-05-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61191502U true JPS61191502U (en) | 1986-11-28 |
| JPH0419203Y2 JPH0419203Y2 (en) | 1992-04-30 |
Family
ID=30617692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985075978U Expired JPH0419203Y2 (en) | 1985-05-22 | 1985-05-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419203Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5084772A (en) * | 1973-12-06 | 1975-07-08 |
-
1985
- 1985-05-22 JP JP1985075978U patent/JPH0419203Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5084772A (en) * | 1973-12-06 | 1975-07-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0419203Y2 (en) | 1992-04-30 |
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