JP2540195Y2 - Erosion prevention structure of piston type pump - Google Patents
Erosion prevention structure of piston type pumpInfo
- Publication number
- JP2540195Y2 JP2540195Y2 JP2337691U JP2337691U JP2540195Y2 JP 2540195 Y2 JP2540195 Y2 JP 2540195Y2 JP 2337691 U JP2337691 U JP 2337691U JP 2337691 U JP2337691 U JP 2337691U JP 2540195 Y2 JP2540195 Y2 JP 2540195Y2
- Authority
- JP
- Japan
- Prior art keywords
- prevention structure
- piston type
- type pump
- oil guide
- guide hole
- 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.)
- Expired - Lifetime
Links
Landscapes
- Reciprocating Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、ピストン式ポンプのエ
ロージョン防止構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing erosion of a piston pump.
【０００２】[0002]
【従来の技術】特公昭６１ー４５０７３号公報に示すピ
ストン式ポンプのエロージョン防止構造が知られてい
る。すなわち、図１に示すようにシリンダブロック１の
シリンダ孔２内にピストン３を嵌挿してピストン室４を
構成し、このピストン室４に開口した開口５をシリンダ
ブロック１の回転によって弁板６の高圧口７と低圧口８
に交互に連通するようにしたピストン式ポンプにおい
て、弁板６のシリンダブロック摺接面９に高圧口７と連
続した切欠溝１０を形成し、この切欠溝１０と離れた位
置に副導油孔１１を形成して、この副導油孔１１からの
副噴流によって切欠溝１０からの主噴流をシリンダ孔２
の軸心に向けることで開口１５、シリンダ孔２に噴流が
衝突しないようにしてエロージョンを防止する構造であ
る。2. Description of the Related Art An erosion prevention structure for a piston type pump disclosed in Japanese Patent Publication No. 61-45073 is known. That is, as shown in FIG. 1, a piston 3 is inserted into a cylinder hole 2 of a cylinder block 1 to form a piston chamber 4, and an opening 5 opened in the piston chamber 4 is rotated by the cylinder block 1 to form a valve plate 6. High pressure port 7 and low pressure port 8
In the piston type pump, the cutout groove 10 is formed on the cylinder block sliding contact surface 9 of the valve plate 6 so as to be continuous with the high pressure port 7. 11 is formed, and the main jet from the notch groove 10 is transferred to the cylinder hole 2 by the sub jet from the sub oil guide hole 11.
In this structure, the jet is prevented from colliding with the opening 15 and the cylinder hole 2 to prevent erosion.
【０００３】[0003]
【考案が解決しようとする課題】かかる構造であると、
弁板６に切欠溝１０を位置決めして加工し、その切欠溝
１０に対して副導油孔１１を位置決めし加工するので、
その加工が大変面倒となる。[Problem to be solved by the invention] With such a structure,
Since the notch groove 10 is positioned and processed in the valve plate 6 and the auxiliary oil guide hole 11 is positioned and processed with respect to the notch groove 10,
The processing becomes very troublesome.
【０００４】そこで、本考案は前述の課題を解決できる
ようにしたピストン式ポンプのエロージョン防止構造を
提供することを目的とする。Accordingly, an object of the present invention is to provide an erosion prevention structure for a piston pump which can solve the above-mentioned problems.
【課題を解決するための手段】切欠溝の先端部に副導油
孔を高圧口に連通して形成したもの。A sub-oil guide hole is formed at the tip of a notch groove so as to communicate with a high pressure port.
【作 用】副導油孔を基準として切欠溝を加工できる
から、加工が簡単となる。[Operation] Since the notch groove can be machined with reference to the auxiliary oil guide hole, the machining is simplified.
【０００５】[0005]
【実 施 例】図２、図３に示すように、切欠溝１０の
先端部に位置決め穴２０を加工し、この位置決め穴２０
と連続して副導油孔２１を形成し、この副導油孔２１を
弁板６のシリンダブロック１と反対側面２２に形成した
補助切欠溝２３で高圧口７に開口する。前記副導油孔２
１は図４のように斜めとして高圧口７に直接開口しても
良い。[Embodiment] As shown in FIGS. 2 and 3, a positioning hole 20 is formed at the tip of the notch groove 10, and the positioning hole 20 is formed.
The auxiliary oil guide hole 21 is formed in the high pressure port 7 by an auxiliary notch groove 23 formed in the side face 22 of the valve plate 6 opposite to the cylinder block 1. The auxiliary oil guide hole 2
1 may be opened obliquely directly to the high pressure port 7 as shown in FIG.
【０００６】このようであるから、切欠溝１０と副導油
孔２１が開口５に同時に連通し、切欠溝１０からの主噴
流を副導油孔２１からの副噴流で拡散してエロージョン
を防止できる。Because of this, the notch groove 10 and the auxiliary oil guide hole 21 communicate with the opening 5 at the same time, and the main jet from the notch groove 10 is diffused by the sub jet from the auxiliary oil guide hole 21 to prevent erosion. it can.
【０００７】切欠溝１０からの主噴流を副導油孔２１か
らの副噴流で拡散してエロージョンを防止できるし、副
導油孔２１を位置決めして加工し、この副導油孔２１を
基準として切欠溝１０を加工すれば良いから、加工が著
しく簡単となる。[0007] The main jet from the notch groove 10 can be diffused by the sub-jet from the sub-oil guide hole 21 to prevent erosion, and the sub-oil guide hole 21 is positioned and machined. Since the notch groove 10 may be machined, the machining becomes extremely simple.
【図１】従来例の断面図である。FIG. 1 is a sectional view of a conventional example.
【図２】本考案の第１実施例を示す断面図である。FIG. 2 is a sectional view showing the first embodiment of the present invention.
【図３】本考案の第１実施例を示す平面図である。FIG. 3 is a plan view showing the first embodiment of the present invention.
【図４】本考案の第２実施例を示す断面図である。FIG. 4 is a sectional view showing a second embodiment of the present invention.
１ シリンダブロック、６ 弁板、７ 高圧ポート、９
シリンダブロック摺接面、１０ 切欠溝、２１ 副導
油孔。1 cylinder block, 6 valve plate, 7 high pressure port, 9
Cylinder block sliding contact surface, 10 cutout groove, 21 auxiliary oil guide hole.
Claims (1)
圧口７に開口した切欠溝１０を形成し、この切欠溝１０
の先端部に副導油孔２１を高圧口７に連通して形成した
ことを特徴とするピストン式ポンプのエロージョン防止
構造。A notch groove (10) opened to a high pressure port (7) is formed in a cylinder block sliding contact surface (9) of a valve plate (6).
An erosion prevention structure for a piston type pump, characterized in that a sub-oil guide hole 21 is formed at the end of the piston pump so as to communicate with the high pressure port 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2337691U JP2540195Y2 (en) | 1991-03-18 | 1991-03-18 | Erosion prevention structure of piston type pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2337691U JP2540195Y2 (en) | 1991-03-18 | 1991-03-18 | Erosion prevention structure of piston type pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04111575U JPH04111575U (en) | 1992-09-28 |
| JP2540195Y2 true JP2540195Y2 (en) | 1997-07-02 |
Family
ID=31908636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2337691U Expired - Lifetime JP2540195Y2 (en) | 1991-03-18 | 1991-03-18 | Erosion prevention structure of piston type pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2540195Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2578119Y2 (en) * | 1991-07-31 | 1998-08-06 | 川崎重工業株式会社 | Hydraulic motor |
| DE112006000312T5 (en) * | 2005-02-10 | 2007-12-13 | Komatsu Ltd. | Hydraulic piston pump |
-
1991
- 1991-03-18 JP JP2337691U patent/JP2540195Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04111575U (en) | 1992-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2089612B1 (en) | Cam cap and oil passage connection structure | |
| ATE224012T1 (en) | PRE-CONTROLLED SERVO VALVE | |
| ATE112365T1 (en) | FUEL INJECTION PUMP FOR DIESEL ENGINES. | |
| JP2540195Y2 (en) | Erosion prevention structure of piston type pump | |
| JPH07305616A (en) | Oil feeder of valve operation unit | |
| JPH07127405A (en) | Locker arm | |
| EP0774547A4 (en) | Valve apparatus for preventing fall of working machine | |
| JP3824416B2 (en) | Hydraulic cylinder unit | |
| JPS6210409Y2 (en) | ||
| JPH037526Y2 (en) | ||
| JPH04506991A (en) | Fuel injection device used in injection-type internal combustion engines | |
| KR100267702B1 (en) | Cylinder head having core type oil gallery | |
| JPH0324809Y2 (en) | ||
| JPH0720328Y2 (en) | Cylinder head oil passage structure | |
| KR830001628Y1 (en) | Fuel injection valve | |
| KR20010029205A (en) | Cam journal line boring tool of cylinder head | |
| JPH0333575A (en) | Poppet valve device | |
| JP2583422Y2 (en) | Relief valve | |
| JPS61258956A (en) | Cylinder | |
| JPS59162359A (en) | Fuel injection valve | |
| JPS61261652A (en) | Fuel injection pump | |
| JPH0526223A (en) | Connecting rod for internal combustion engine | |
| JPS5917238U (en) | Fuel injection timing adjustment device for fuel injection pump | |
| JPS60185004U (en) | Zero lash adjustment device | |
| JPS5825568A (en) | Fuel injection nozzle for supplying fuel to internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |