JPS5815770A - Radial piston pump - Google Patents

Radial piston pump

Info

Publication number
JPS5815770A
JPS5815770A JP57117904A JP11790482A JPS5815770A JP S5815770 A JPS5815770 A JP S5815770A JP 57117904 A JP57117904 A JP 57117904A JP 11790482 A JP11790482 A JP 11790482A JP S5815770 A JPS5815770 A JP S5815770A
Authority
JP
Japan
Prior art keywords
piston pump
radial piston
bottle
pump according
screw cap
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
Application number
JP57117904A
Other languages
Japanese (ja)
Other versions
JPH0257232B2 (en
Inventor
ゲオルク・リスカ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of JPS5815770A publication Critical patent/JPS5815770A/en
Publication of JPH0257232B2 publication Critical patent/JPH0257232B2/ja
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (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

【発明の詳細な説明】 本発明はラジアルピストンポンプに関する。[Detailed description of the invention] The present invention relates to a radial piston pump.

搬送ピストンの圧力室の中に突き出してねじ込みキャッ
プに固定されたビンをもったラジアルピストンポンプは
、たとえば西ドイツ特許出願公開＠２２４８５１８号公
報で知られている。かかるビンは一方では搬送ピストン
の上側にある圧力室内の圧油のよどみ容量を小さくする
目的を有し、他方では搬送ピストンを偏心輪に押圧する
ばねのガイドとして用いられる。よどみ容量を小さくす
ることによって、搬送過程の始めに搬送ピストンの圧力
室内に封じ込まれた空気がかなり少なくなるので、ポン
プの吸込み特性が改善できる。付属されている吐出し弁
はそのために既に早めに開かれる。A radial piston pump with a vial projecting into the pressure chamber of a conveying piston and fixed to a screw cap is known, for example, from DE 22 48 518 A1. Such a bottle has the purpose, on the one hand, to reduce the stagnation volume of the pressure oil in the pressure chamber above the conveying piston, and on the other hand, it serves as a guide for the spring that presses the conveying piston against the eccentric. By reducing the stagnation volume, considerably less air is trapped in the pressure chamber of the conveying piston at the beginning of the conveying process, so that the suction characteristics of the pump can be improved. The attached discharge valve is therefore already opened early.

ま九偏心輪上を摺動する搬送ピストンの底を凹面状に形
成することが西ドイツ特許第２７４４００６号明細書で
知られている。この処置によって、並びに製作あるいは
荷重に基づくピストン軸の細心に対する僅かな角度誤差
によって、ピストン底が偏心輪に対して点接触を生ずる
。このことはピストン長手軸心のまわりに力成分を作用
させることになり、この力成分はピストンの回転および
それに伴なってピストン底の一様な接触を可能にする。It is known from German Patent No. 27 44 006 to design the bottom of the conveying piston, which slides on an eccentric, to be concave. By this measure, as well as by slight angular tolerances of the piston axis due to manufacturing or loading, the piston bottom produces a point contact with the eccentric. This results in a force component acting around the longitudinal axis of the piston, which allows rotation of the piston and thus uniform contact of the piston bottom.

それによってかじりの危険はかなり防止金れる。Thereby the risk of galling is considerably prevented.

本発明は冒頭に述べた形式（西ドイツ特許出願公開第２
２４８５１８号公報）に基づくピストンポンプから出発
し、僅かな経費で接触特性を史に改善することを目的と
している。The invention is of the type mentioned at the outset (West German Patent Application No. 2)
Starting from a piston pump based on Japanese Patent Publication No. 248,518), the aim is to improve the contact characteristics at a low cost.

この目的は特許請求の範囲Ｉ！１項の特徴部分に記載の
手段によって達成できる。This purpose is claimed in claim I! This can be achieved by the means described in the characteristic section of Section 1.

本発明によれば搬送ピストンの押圧ばねはたとえば球面
状端面をもった独立したビンを介してねじ込みキャップ
に当接する。小さなほぼ点状の接触面によってねじ込み
キャップにおける摩擦トルクはかなり減少されるので、
長手細心のまわりの搬送ピストンの回転運動は容易にな
り、それによってピストン底の荷重は一層減少される。According to the invention, the pressure spring of the conveying piston rests on the screw cap, for example via a separate pin with a spherical end surface. The frictional torque at the screw cap is considerably reduced due to the small, almost point-like contact surface, so that
The rotational movement of the conveying piston around the longitudinal axis is facilitated, whereby the load on the piston bottom is further reduced.

その場合主に摩擦トルクを減少するために、ビンとねじ
込みキャップとの接触点はできるだけビンの軸心に位置
される。In that case, the point of contact between bottle and screw-on cap is located as close to the axis of the bottle as possible, primarily in order to reduce frictional torques.

本発明は平らなピストン底と、あるいは特に有利には西
ドイツ特許第２７４４００６号明細書に基づく凹面状ピ
ストン底と共に用いられる。The invention can be used with flat piston bases or, particularly preferably, with concave piston bases according to German Patent No. 2,744,006.

小さな回転トルクから生ずる搬送ピストンのその細心の
壕わシの容易な回転は次のような利点を生ずる。The easy rotation of the fine recess of the conveying piston resulting from the small rotational torque results in the following advantages:

ａ）ピストン底の良好な接触。a) Good contact of the piston bottom.

ｂ）全寿命期間中における僅かな摩耗。b) Slight wear during the entire service life.

Ｃ）ピストン底における僅かな摩耗に基づく全寿命期間
中における僅かな搬送流量変化。C) Small changes in delivery flow rate during the entire life due to small wear on the bottom of the piston.

ｄ）僅かな摩耗のための寿命期間中における僅かな圧力
脈動変化。d) Slight pressure pulsation changes during service life due to slight wear.

ｅ）新たな部品が不要。既存の部品の僅かな変更で改咎
が達せられる。従っておまり高価に以下図面に示す実施
例に基づいて本発明を詳細−シング１に支持されている
。搬送ピストン４は。e) No new parts required. Modifications can be achieved with slight changes to existing parts. Therefore, the present invention will be described in more detail below on the basis of the embodiment shown in the drawings. The conveyance piston 4 is.

ばね５によって偏心輪３に接触保持されている。It is held in contact with the eccentric wheel 3 by a spring 5.

搬送ピストン４１に収容するためのシリンダ孔６はねじ
込みキャップ７で閉鎖されている。圧力室８内の死空間
を制限するために、ビンＩＯが設けられている。本発明
に基づいてこのビン１０は凸面状端面１１でばね５の力
によってねじ込みキャップ７の平らな面めるいは凹状の
面に当接している。ねじ込みキャップ７の面はその半径
がビン１０のそｎよシも非常に大きい場合には、凸面状
でも良い。The cylinder bore 6 for receiving the conveying piston 41 is closed with a screw cap 7. In order to limit the dead space within the pressure chamber 8, a bin IO is provided. According to the invention, this bottle 10 rests with its convex end face 11 under the force of the spring 5 against the flat or concave face of the screw cap 7. The surface of the screw cap 7 may be convex if its radius is very large compared to that of the bottle 10.

第２図においてビン１０の端面には突起２１が設けられ
ている。In FIG. 2, a protrusion 21 is provided on the end surface of the bottle 10.

第３図の実施例は円錐状端面３１を示している。The embodiment of FIG. 3 shows a conical end surface 31.

第４図においてビン１０は平らな端面を有しているが、
ねじ込みキャップ７が突起４０を有している。In FIG. 4, the bottle 10 has a flat end surface,
The screw cap 7 has a projection 40 .

第５図におけるねじ込みキャップには円錐状凹ｍ５０が
切制加工され、との凹部（資）とビン１０の平らな端面
との間に球５１が挿入されている。The screw cap in FIG. 5 has a conical recess m50 cut therein, and a ball 51 is inserted between the recess m50 and the flat end surface of the bottle 10.

第６図に基づ〈実施例は、凸面状あるいはレンズ状の凸
部６０をもったねじ込みキャップを示している。The embodiment according to FIG. 6 shows a screw-on cap with a convex or lenticular protrusion 60.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に基づくラジアルピストンポンプの部分
断面図、＠２図ないし第６図はそれぞれ第１図における
ビンあるいはねじ込みキャップの異なる実施例の要部断
面図である。 １・・・ケーシング、２・・・駆動軸、３・・・偏心輪
、４・・・搬送ピストン、５・・・ばね、７・・・ねじ
込みキャップ、８・・・圧力室、１０・・・ビン、１１
・・・凸面状端面、２１・・・突起、３１・・・円錐状
端面、４０・・・突起、（資）・・・円錐状凹部、５１
・・・球、６０・・・球面突起。 出願人代理人　　猪　股　　　　清 ４０３−FIG. 1 is a partial sectional view of a radial piston pump according to the present invention, and FIGS. 2 to 6 are sectional views of main parts of different embodiments of the bottle or screw cap in FIG. 1, respectively. DESCRIPTION OF SYMBOLS 1... Casing, 2... Drive shaft, 3... Eccentric wheel, 4... Conveying piston, 5... Spring, 7... Screw-in cap, 8... Pressure chamber, 10...・Bin, 11
...Convex end surface, 21...Protrusion, 31...Conical end surface, 40...Protrusion, (material)...Conical recess, 51
... Sphere, 60... Spherical protrusion. Applicant's agent Kiyoshi Inomata 403-

Claims (1)

【特許請求の範囲】 １、ラジアルピストンポンプが偏心輪によって駆動され
かつばねで付勢されている少くともひとつの搬送ピスト
ンを有し、この搬送ピストンを収容するシリンダ孔がね
じ込みキャップヤ閉鎖され、このねじ込みキャップと搬
送ピストンとの間にある圧力室の死空間を小さくする丸
めに搬送ピストンの圧力室に突き出たビンが設けられて
いる液圧装置用のラジアルピストンポンプにおいて、前
記ビアＣ１（ホ）工搬送ピストに４）を付勢するばね（
５）Ｋよってねじ込みキャップ（′７）に接触保持され
、このねじ込みキャップ（７）と前記ビン（１のとの間
にほぼ点接触が生じ、この点接触がビン（１のの細心に
位置していることを特徴とするラジアルピストンポンプ
。 ２、ビン（１ののねじ込みキャップ（７）ＩＩの端面０
１）が凸面状に形成されていることｔ−特徴とする特許
請求の範囲第１項に記載のラジアルピストンポンプ。 ３、ビン（１のの端面が突起（２１）を有していること
を特徴とする特許請求の範囲第１項に記載のラジアルピ
ストンポンプ。 ４、ビン（１のの端面（３１）が円錐状に形成されてい
ることを特徴とする特許請求の範囲第１項に記載のラジ
アルピストンポンプ。 ５、ねじ込みキャップ（７）が突起（４０）を有してい
ることを特徴とする特許請求の範囲第１ＸＪに記載のラ
ジアルピストンポンプ。 ６、ねじ込みキャップ（７）が円錐状凹部（５０）　ｔ
−有し、ビン（１のの端面とねじ込みキャップとの間に
球（５１）が挿入されていることを特徴とする特許請求
の範囲第１項に記載のラジアルピストンポンプ。 ７、ねじ込みキャップ（７）が球面突起を備えているこ
とを特徴とする特許請求の範囲第１項に記載のラジアル
ピストンポンプ。[Claims] 1. The radial piston pump has at least one conveying piston driven by an eccentric and biased by a spring, and the cylinder bore accommodating the conveying piston is closed by a screw cap. In a radial piston pump for a hydraulic device, the via C1 (E) is provided with a rounded bottle protruding into the pressure chamber of the transfer piston to reduce the dead space in the pressure chamber between the screw cap and the transfer piston. The spring (4) that urges the mechanical transport piston (
5) K is held in contact with the screw cap ('7), and there is approximately a point contact between this screw cap (7) and the bottle (1), and this point contact is located meticulously on the bottle (1). A radial piston pump characterized in that: 2. The end face of the bottle (screwed cap (7) of 1) II
The radial piston pump according to claim 1, characterized in that: 1) is formed in a convex shape. 3. The radial piston pump according to claim 1, wherein the end surface of the bottle (1) has a protrusion (21). 4. The end surface (31) of the bottle (1) has a conical shape. The radial piston pump according to claim 1, characterized in that it is formed in the shape of a radial piston pump according to claim 1.5. Radial piston pump according to range No. 1 XJ. 6. The screw cap (7) has a conical recess (50) t
- a radial piston pump according to claim 1, characterized in that the ball (51) is inserted between the end face of the bottle (1) and the screw-on cap.7. 7) The radial piston pump according to claim 1, wherein the radial piston pump has a spherical protrusion.
JP57117904A 1981-07-08 1982-07-08 Radial piston pump Granted JPS5815770A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3126917A DE3126917C2 (en) 1981-07-08 1981-07-08 Radial piston pump
DE3126917.6 1981-07-08

Publications (2)

Publication Number Publication Date
JPS5815770A true JPS5815770A (en) 1983-01-29
JPH0257232B2 JPH0257232B2 (en) 1990-12-04

Family

ID=6136396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57117904A Granted JPS5815770A (en) 1981-07-08 1982-07-08 Radial piston pump

Country Status (7)

Country Link
JP (1) JPS5815770A (en)
BR (1) BR8203941A (en)
DE (1) DE3126917C2 (en)
FR (1) FR2509386A1 (en)
GB (1) GB2102082B (en)
IT (1) IT1159206B (en)
ZA (1) ZA823963B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63200681U (en) * 1987-06-15 1988-12-23
JPH0228583U (en) * 1988-08-16 1990-02-23
JPH0272373U (en) * 1988-10-20 1990-06-01
JP3170327U (en) * 2011-04-18 2011-09-15 幸三 倉橋 Spiral spear

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4318073A1 (en) * 1992-06-06 1993-12-09 Barmag Luk Automobiltech Radial piston pump with pot-shaped pistons - uses inserts concentric with piston springs to minimise fluid dead space
JP4871381B2 (en) * 2009-09-17 2012-02-08 日信工業株式会社 Plunger pump

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5030106A (en) * 1973-04-17 1975-03-26

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2248518A1 (en) * 1972-10-03 1974-04-11 Fichtel & Sachs Ag RADIAL PISTON PUMP WITH RING-SHAPED SIDE OUTLET CHANNEL AND SLOTTED VALVE SPRING PLATE
DE2431938A1 (en) * 1974-07-03 1976-01-22 Bosch Gmbh Robert Piston pump device with bore cut into piston - has sliding bolt in the axial piston aperture which slides under the influence of radial play
DE2744006B1 (en) * 1977-09-30 1978-10-19 Zahnradfabrik Friedrichshafen Piston pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5030106A (en) * 1973-04-17 1975-03-26

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63200681U (en) * 1987-06-15 1988-12-23
JPH0228583U (en) * 1988-08-16 1990-02-23
JPH0272373U (en) * 1988-10-20 1990-06-01
JP3170327U (en) * 2011-04-18 2011-09-15 幸三 倉橋 Spiral spear

Also Published As

Publication number Publication date
BR8203941A (en) 1983-06-28
IT8246840A0 (en) 1982-07-02
GB2102082A (en) 1983-01-26
IT1159206B (en) 1987-02-25
GB2102082B (en) 1984-10-17
FR2509386A1 (en) 1983-01-14
IT8246840A1 (en) 1984-01-02
FR2509386B1 (en) 1985-03-08
JPH0257232B2 (en) 1990-12-04
DE3126917C2 (en) 1984-06-14
ZA823963B (en) 1983-03-30
DE3126917A1 (en) 1983-01-27

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