JPH04111575U - Erosion prevention structure of piston pump - Google Patents
Erosion prevention structure of piston pumpInfo
- Publication number
- JPH04111575U JPH04111575U JP2337691U JP2337691U JPH04111575U JP H04111575 U JPH04111575 U JP H04111575U JP 2337691 U JP2337691 U JP 2337691U JP 2337691 U JP2337691 U JP 2337691U JP H04111575 U JPH04111575 U JP H04111575U
- Authority
- JP
- Japan
- Prior art keywords
- sub
- pressure port
- prevention structure
- notch groove
- high pressure
- 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
- 230000003628 erosive effect Effects 0.000 title claims abstract description 8
- 230000002265 prevention Effects 0.000 title claims description 4
- 238000005461 lubrication Methods 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
Abstract
(57)【要約】
【目的】 エロージョンを防止できるし、簡単に加工で
きるようにする。
【構成】 弁板６のシリンダブロック摺接面９に切欠溝
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もの。
【効果】 副導油孔２１を基準として切欠溝１０を加工
できるから、その加工が簡単となる。
(57) [Summary] [Purpose] To prevent erosion and facilitate processing. [Structure] A notch groove 10 is formed in the cylinder block sliding surface 9 of the valve plate 6, and a sub oil guide hole 21 is formed at the tip of the notch groove 10.
is formed by communicating with the high pressure port 7. [Effect] Since the notched groove 10 can be machined using the sub-lubrication hole 21 as a reference, the machining becomes easy.
Description
【０００１】0001
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。 The present invention relates to an erosion prevention structure for a piston pump.
【０００２】0002
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１ １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。 Erosion prevention structure of piston pump shown in Japanese Patent Publication No. 61-45073 The structure is known. That is, as shown in FIG. 3 is fitted and inserted to form a piston chamber 4, and an opening 5 opened to this piston chamber 4 is connected to the piston chamber 4. The high-pressure port 7 and low-pressure port 8 of the valve plate 6 are alternately connected to each other by rotation of the dauber block 1. In the piston type pump, high pressure is applied to the cylinder block sliding surface 9 of the valve plate 6. A notched groove 10 continuous with the opening 7 is formed, and a sub-lubrication hole 1 is formed at a position apart from this notched groove 10. 1, and the main jet from the notch groove 10 is caused by the sub jet from the sub oil guide hole 11. By directing the jet toward the axis of the cylinder hole 2, the jet flow will not collide with the opening 15 and the cylinder hole 2. This structure prevents erosion in this way.
【０００３】0003
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。 With such a structure, the notch groove 10 is positioned and processed in the valve plate 6, and the notch groove 10 is Since the sub oil guide hole 11 must be positioned and machined relative to 10, the machining is very troublesome. Ru.
【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。0004 Therefore, this invention was developed to create a piston-type pump that can solve the above-mentioned problems. The purpose is to provide an anti-motion structure.
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 the notched groove to communicate with the high pressure port.
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。 Since the notch groove can be machined based on the auxiliary oil guide hole, the machining becomes easy.
【０００５】[0005]
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２１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。 As shown in FIGS. 2 and 3, a positioning hole 20 is machined at the tip of the notch groove 10. A sub oil guide hole 21 is formed continuously with the positioning hole 20 of the valve plate 6. An auxiliary cutout groove 23 formed on the opposite side surface 22 of the cylinder block 1 opens into the high pressure port 7. Speak. The sub-lubrication hole 21 may be slanted as shown in FIG. 4 and open directly into the high-pressure port 7.
【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。[0006] Because of this, the notch groove 10 and the sub-lubrication hole 21 communicate with the opening 5 at the same time, and the notch Erosion is prevented by diffusing the main jet from the groove 10 with the sub-jet from the sub-lubrication hole 21. Can be stopped.
【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 flow from the notch groove 10 is diffused by the sub jet flow from the sub oil guide hole 21 to prevent erosion. By positioning and processing the sub oil guide hole 21, and using this sub oil guide hole 21 as a reference. Since it is sufficient to process the notch groove 10 as shown in FIG.
【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 a 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 a 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 surface, 10 notch 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。1. A notched groove 10 that opens to the high pressure port 7 is formed in the cylinder block sliding surface 9 of the valve plate 6.
An erosion prevention structure for a piston type pump, characterized in that a sub-lubrication hole 21 is formed at the tip of the piston pump in communication with a 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 true JPH04111575U (en) | 1992-09-28 |
| JP2540195Y2 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0514568U (en) * | 1991-07-31 | 1993-02-26 | 川崎重工業株式会社 | Hydraulic pump motor |
| WO2006085547A1 (en) * | 2005-02-10 | 2006-08-17 | Komatsu Ltd. | Hydraulic piston pump |
-
1991
- 1991-03-18 JP JP2337691U patent/JP2540195Y2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0514568U (en) * | 1991-07-31 | 1993-02-26 | 川崎重工業株式会社 | Hydraulic pump motor |
| WO2006085547A1 (en) * | 2005-02-10 | 2006-08-17 | Komatsu Ltd. | Hydraulic piston pump |
| GB2437028A (en) * | 2005-02-10 | 2007-10-10 | Komatsu Mfg Co Ltd | Hydraulic piston pump |
| JPWO2006085547A1 (en) * | 2005-02-10 | 2008-06-26 | 株式会社小松製作所 | Hydraulic piston pump |
| GB2437028B (en) * | 2005-02-10 | 2010-06-16 | Komatsu Mfg Co Ltd | Hydraulic piston pump |
| JP4646972B2 (en) * | 2005-02-10 | 2011-03-09 | 株式会社小松製作所 | Hydraulic piston pump |
| US8047120B2 (en) * | 2005-02-10 | 2011-11-01 | Komatsu Ltd. | Hydraulic piston pump with a balance valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2540195Y2 (en) | 1997-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |