WO1996023974A1 - Hubkolbenpumpe - Google Patents
Hubkolbenpumpe Download PDFInfo
- Publication number
- WO1996023974A1 WO1996023974A1 PCT/DE1996/000046 DE9600046W WO9623974A1 WO 1996023974 A1 WO1996023974 A1 WO 1996023974A1 DE 9600046 W DE9600046 W DE 9600046W WO 9623974 A1 WO9623974 A1 WO 9623974A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- eccentric
- bow spring
- pistons
- reciprocating
- pump according
- Prior art date
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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
- F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
-
- 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
Definitions
- the invention relates to a reciprocating pump according to the type of the main claim.
- Such a reciprocating piston pump is known from DE 22 43 137, in which two pistons are arranged facing away from one another radially to the axis of rotation of an eccentric located between them.
- the pistons are pressed against a circumferential surface of the eccentric by a C-shaped bow spring which bulges around the circumference of the eccentric and both ends of which engage a piston.
- these To engage the bow spring on the piston, these each have a transverse bore at their ends facing the eccentric, through which the ends of the bow spring are inserted.
- the bow spring is elastically expanded, it is under tension and holds the pistons in contact with the circumferential surface of the eccentric.
- a disadvantage of the known reciprocating pump is that the two pistons for mounting the bow spring so about their longitudinal axis must be rotated that their through holes are accessible through a mounting hole for the eccentric in the pump housing for inserting the ends of the bow spring. Furthermore, the bores of both pistons must be aligned parallel to each other in order to be able to insert the bow spring. Since the pistons have to be inserted into cylinder bores in the pump housing before mounting the bow spring, the pistons are only accessible from the outside end faces and inside the piston ends protruding into the mounting opening for the eccentric, so that the pistons are difficult to grasp for turning.
- Reciprocating pump is difficult to carry out and is therefore time and cost intensive.
- the reciprocating pump according to the invention with the features of claim 1 has the advantage that the bow spring can be mounted in any angular position of the two pistons, alignment by rotating the pistons around their longitudinal axes is unnecessary.
- the hook-shaped eyelets are pressed with their opening mouths forward into the ring grooves on the mutually facing ends of the two pistons until they snap in there.
- the snap connection between the bow spring and piston prevents the bow spring from loosening automatically. This allows a quick and easy assembly of the reciprocating pump according to the invention.
- the bow spring is a simple bent wire part that can be manufactured quickly and cheaply without waste of material.
- the bow spring continues over one of its two eyelets.
- the extension preferably extends approximately in the tangential direction or in the circumferential direction with respect to the eccentric, it extends a region of the bow spring that is curved about the eccentric beyond the eyelet. Together with a stop surface of the pump housing, which is perpendicular to the
- Rotation axis of the eccentric and is arranged with little or no distance from the extension and the curved area of the bow spring, the extension and the curved area prevent the bow spring from rotating in the annular grooves of the pistons about their longitudinal axis. At most a minimal swivel movement of the
- Bow spring is possible. This prevents a free end of the bow spring from abutting an inner wall of the pump housing and removing chips from the pump housing during the lifting movement.
- the free end on the eyelet of the bow spring, which has no extension, does not reach the plane in which the curved area or the extension is located.
- the anti-twist device has the advantage that no special configuration of the pump housing or extra securing parts against twisting are necessary. It is therefore easy and inexpensive to implement.
- Figure 2 shows an axial section through the reciprocating pump shown in Figure 1;
- Figure 3 shows a bow spring in plan view
- Figure 4 shows the bow spring of Figure 2 in view
- Figure 5 shows a second embodiment of a bow spring in plan view
- Figure 6 shows the bow spring of Figure 4 in view.
- the reciprocating piston pump 10 shown in sections in FIGS. 1 and 2, has two pistons 12, which are coaxial and facing away from one another radially
- Rotation axis 14 of an eccentric 16 located between them are arranged.
- the two pistons 12 are displaceably guided in cylinders 18, which are inserted into a pump housing 20.
- Mutually facing ends of the pistons 12 project from the cylinders 18 into an eccentric space 22 inside the
- the eccentric space 22 is a flat, cylindrical cavity, the axis of which, which is also the axis of rotation 14 of the eccentric 16, intersects the longitudinal axes of the pistons 12 at right angles.
- the cylinders 18 open vertically into a circumferential surface 24 of the eccentric space 22.
- the ends of the pistons 12 projecting into the eccentric space 22 are each provided with an annular groove 26 for the engagement of a bow spring 28.
- This bow spring 28 is elastically expanded in the assembled state, as shown in FIGS. 1 and 2, it is under prestress and presses facing end faces 30 of the pistons 12 from the outside against a circumferential surface of a bearing ring 32.
- the bearing ring 32 is part of one the eccentric 16 attached ball bearings.
- this ball bearing has bearing balls 34 which are held equidistantly on a cylindrical circumferential surface 38 of the eccentric 16 by a ball ring 36.
- This ball bearing arrangement 32, 34, 36 serves to reduce the friction between the eccentric 16 and the piston 12.
- one of the two pistons is shown in section in the groove base, the bearing ring 32 and the bow spring are shown in view.
- the eccentric 14 is a cylindrical pin which is arranged in one piece with an eccentric shaft 40 and eccentrically with an eccentricity e at one end.
- the eccentric 16 By rotating the eccentric shaft 40 by means of an electric motor (not shown), the eccentric 16 is driven to rotate about its axis of rotation 14, which is also the axis of rotation of the eccentric shaft 40.
- the eccentric 16 drives the bearing ring 32 in a circular movement about the axis of rotation 14, the bearing ring 32 being decoupled from the rotation of the eccentric 16 via the bearing balls 34, the bearing ring 32 does not rotate during its circular movement. Due to its circular movement, the bearing ring 32 drives the &. Piston 12 adjacent to it back and forth
- the bow spring 28 is shown in Figures 2 and 3, wherein Figure 3 is a view in the direction of arrow III in Figure 4.
- the bow spring 28 is bent from round spring steel wire. It has a curved area 42 which, when the bow spring 28 (FIG. 1) is mounted, bulges around the circumference of the eccentric 16.
- the bow spring 28 is bent into hook-shaped eyelets 44 which are open at one point on their circumference.
- the eyelets 44 are located in planes that are perpendicular to a plane in which the curved region 42 is located.
- the two planes in which the eyelets 44 are located are not parallel, but somewhat inclined to one another (FIG. 4). Due to the elastic expansion of the bow spring 28 during assembly, the two eyelets 44 are parallel to each other ( Figure 1).
- the eyelets 44 are bent approximately at right angles to the curved area 42, so that the eyelets 44 open in the direction of the plane in which the curved area 42 is located.
- the two eyelets 44 lie congruently one above the other.
- the clear width at an opening mouth 48 is smaller than the diameter of the pistons 12 at the bottom of the annular groove 26, as a result of which the eyelet 44 is in contact with one another Introducing them into the annular groove 26 first expands elastically and then snaps in and no longer releases automatically.
- a free end of the eyelet 44 is formed as a threading section 50, 51, in the area of which the clear width from the opening mouth 48 increases outwards.
- the threading section 50, 51 serves to position the bow spring 42 for introducing its eyelets 44 into the annular grooves 26 of the pistons 12 and supports the elastic expansion of the eyelets 44.
- the bow spring 28 On one of the two eyelets 44, the bow spring 28 has an extension 56 integral with it on its side facing away from the curved region 42. This is located in one plane with the curved region 42 and extends a bit approximately in the circumferential direction of the eccentric 16.
- End wall 58 of the pump housing 20 delimiting the eccentric space 22 is located close to the curved area 42 and the extension 56 of the bow spring 28.
- the end wall forming a stop surface 58 prevents the bow spring 28 from rotating in the annular grooves 26 of the pistons 12 and allows only one slight pivoting movement too ( Figure 2).
- This free end 60 does not extend to the plane in which the curved region 42 and the extension 56 of the bow spring 28 are located (FIG. 3).
- the pistons 12 are pushed into the cylinders 18 from the outside after the latter have been inserted into the pump housing 20.
- the pistons 12 are pushed so far into the cylinder 18 that their mutually facing ends protrude into the eccentric space 22 and their annular grooves 26 are at a distance from one another which corresponds to the distance between the two eyelets 44 of the bow spring 28 in the relaxed state.
- the bow spring 28 is then pressed with the opening mouths 48 of its eyelets 44 first into the annular grooves 26 until the eyelets 44 snap into the annular grooves 26.
- the curved area 42 of the bow spring 28 extends laterally and does not interfere with the assembly.
- Ball bearings 32, 34, 36 carrying eccentric 16 the pistons 12 must be pressed apart against the force of the bow spring 28, so that the bearing ring 32 can be brought between the mutually facing end faces 30 of the pistons 12.
- the side of the bearing ring 32 facing away from the eccentric shaft 40 can be conical, as a result of which the bearing ring 32 presses the pistons 12 apart when the eccentric shaft 40 is inserted into the pump housing 20, which takes place in the direction of the axis of rotation 14 of the eccentric shaft 40.
- FIGS. 5 and 6 show an embodiment of a bow spring 52 that is modified compared to FIGS. 3 and 4.
- a curved region 54 of this bow spring 52 is shaped into a polygon instead of a continuous arc. Otherwise, this bow spring 54 is constructed in the same way as the bow spring 28 already described. For this reason, the bow spring 54 is not described again; the statements relating to the bow spring 28 shown in FIGS. 3 and 4 apply.
- the bow spring 54 shown in FIGS. 5 and 6 is instead of the bow spring 28 shown in FIGS. 3 and 4 in the reciprocating piston pump 10 applicable.
- This second embodiment of the bow spring 54 has the advantage that narrow manufacturing tolerances can be better maintained.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/718,582 US5897302A (en) | 1995-02-03 | 1996-01-17 | Reciprocating piston pump with radial cylinders based by a wire hoop spring against an eccentric shaft |
DE59600286T DE59600286D1 (de) | 1995-02-03 | 1996-01-17 | Hubkolbenpumpe |
JP52315296A JP3883570B2 (ja) | 1995-02-03 | 1996-01-17 | 往復動行程ピストンポンプ |
EP96900275A EP0774072B1 (de) | 1995-02-03 | 1996-01-17 | Hubkolbenpumpe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19503621.2 | 1995-02-03 | ||
DE19503621A DE19503621A1 (de) | 1995-02-03 | 1995-02-03 | Hubkolbenpumpe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996023974A1 true WO1996023974A1 (de) | 1996-08-08 |
Family
ID=7753153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/000046 WO1996023974A1 (de) | 1995-02-03 | 1996-01-17 | Hubkolbenpumpe |
Country Status (6)
Country | Link |
---|---|
US (1) | US5897302A (de) |
EP (1) | EP0774072B1 (de) |
JP (1) | JP3883570B2 (de) |
CN (1) | CN1145657A (de) |
DE (2) | DE19503621A1 (de) |
WO (1) | WO1996023974A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2386569A1 (de) | 1997-10-30 | 2011-11-16 | Novozymes A/S | Mutanten der alpha-Amylase |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19650276A1 (de) * | 1996-12-04 | 1998-06-10 | Teves Gmbh Alfred | Hubkolbenpumpe |
DE19709587A1 (de) * | 1997-03-08 | 1998-09-10 | Itt Mfg Enterprises Inc | Radialkolbenpumpe mit Exzenterring |
DE19859073A1 (de) * | 1998-12-21 | 2000-06-29 | Continental Teves Ag & Co Ohg | Kolbenpumpe |
US6183212B1 (en) | 1999-02-17 | 2001-02-06 | Stanadyne Automotive Corp. | Snap-in connection for pumping plunger sliding shoes |
DE19948445A1 (de) * | 1999-10-08 | 2001-04-12 | Continental Teves Ag & Co Ohg | 6-Kolben-Pumpe, insbesondere für geregelte Bremssysteme |
US6684755B2 (en) | 2002-01-28 | 2004-02-03 | Bristol Compressors, Inc. | Crankshaft, compressor using crankshaft, and method for assembling a compressor including installing crankshaft |
JP4167527B2 (ja) * | 2003-04-04 | 2008-10-15 | 三輪精機株式会社 | オイルポンプおよびそれを使用したキャブチルト装置 |
US7134846B2 (en) * | 2004-05-28 | 2006-11-14 | Stanadyne Corporation | Radial piston pump with eccentrically driven rolling actuation ring |
DE102004037145B4 (de) * | 2004-07-30 | 2013-11-07 | Robert Bosch Gmbh | Kolbenpumpe mit kompaktem Aufbau |
DE102007038525A1 (de) | 2007-08-16 | 2009-02-19 | Robert Bosch Gmbh | Pumpe, insbesondere Kraftstoffhochdruckpumpe |
DE102008055070A1 (de) * | 2008-12-22 | 2010-07-01 | Robert Bosch Gmbh | Antriebseinheit |
DE202009003133U1 (de) * | 2009-03-09 | 2009-06-04 | Baudat Gmbh & Co. Kg | Kolbenpumpe mit mehreren Kolben |
DE102009027576A1 (de) * | 2009-07-09 | 2011-01-13 | Robert Bosch Gmbh | Kraftstoffhochdruckpumpe |
DE102010028581A1 (de) * | 2010-05-05 | 2011-11-10 | Robert Bosch Gmbh | Exzenterlager |
DE102010039269A1 (de) | 2010-08-12 | 2012-02-16 | Robert Bosch Gmbh | Kolbenpumpen für eine hydraulische Fahrzeugbremsanlage |
JP6762229B2 (ja) * | 2016-12-27 | 2020-09-30 | 三菱重工機械システム株式会社 | 油圧機械 |
DE102017006724A1 (de) | 2017-07-14 | 2019-01-17 | Thomas Janning | Abdeckung mit Einzugsvorrichtung und Teilerspitze |
DE102019106531A1 (de) * | 2019-03-14 | 2020-09-17 | Baier & Köppel GmbH & Co. KG | Schmierstoffpumpe mit automatisch ankoppelnder Pumpeinheit und Verfahren zum Ankoppeln einer Pumpeinheit an eine Schmierstoffpumpe |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2271570A (en) * | 1940-07-31 | 1942-02-03 | Harvey S Pardee | Pump |
DE1453664A1 (de) * | 1963-02-16 | 1969-03-06 | Teves Gmbh Alfred | Radialkolbenpumpe,vorwiegend fuer kraftfahrzeughydraulische Anlagen |
DE1453663A1 (de) * | 1963-02-16 | 1969-03-13 | Teves Gmbh Alfred | Radialkolbenpumpe |
DE2243137A1 (de) * | 1972-09-01 | 1974-03-14 | Langen & Co | Radialkolbenpumpe |
DE4204631A1 (de) * | 1992-02-15 | 1992-10-15 | Schaeffler Waelzlager Kg | Radialkolbenpumpe |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1653637C3 (de) * | 1967-06-24 | 1975-03-13 | Alfred Teves Gmbh, 6000 Frankfurt | Radialkolbenpumpe |
US5642988A (en) * | 1991-02-15 | 1997-07-01 | Ina Walzlager Schaeffler Kg | Radial piston pump |
EP0666418B1 (de) * | 1994-01-29 | 1997-04-23 | Robert Bosch Gmbh | Hubkolbenpumpe |
-
1995
- 1995-02-03 DE DE19503621A patent/DE19503621A1/de not_active Withdrawn
-
1996
- 1996-01-17 JP JP52315296A patent/JP3883570B2/ja not_active Expired - Fee Related
- 1996-01-17 WO PCT/DE1996/000046 patent/WO1996023974A1/de active IP Right Grant
- 1996-01-17 EP EP96900275A patent/EP0774072B1/de not_active Expired - Lifetime
- 1996-01-17 CN CN96190010A patent/CN1145657A/zh active Pending
- 1996-01-17 US US08/718,582 patent/US5897302A/en not_active Expired - Lifetime
- 1996-01-17 DE DE59600286T patent/DE59600286D1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2271570A (en) * | 1940-07-31 | 1942-02-03 | Harvey S Pardee | Pump |
DE1453664A1 (de) * | 1963-02-16 | 1969-03-06 | Teves Gmbh Alfred | Radialkolbenpumpe,vorwiegend fuer kraftfahrzeughydraulische Anlagen |
DE1453663A1 (de) * | 1963-02-16 | 1969-03-13 | Teves Gmbh Alfred | Radialkolbenpumpe |
DE2243137A1 (de) * | 1972-09-01 | 1974-03-14 | Langen & Co | Radialkolbenpumpe |
DE4204631A1 (de) * | 1992-02-15 | 1992-10-15 | Schaeffler Waelzlager Kg | Radialkolbenpumpe |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2386569A1 (de) | 1997-10-30 | 2011-11-16 | Novozymes A/S | Mutanten der alpha-Amylase |
EP2386568A1 (de) | 1997-10-30 | 2011-11-16 | Novozymes A/S | Mutanten der alpha-Amylase |
EP2388267A1 (de) | 1997-10-30 | 2011-11-23 | Novozymes A/S | Mutanten der alpha-Amylase |
Also Published As
Publication number | Publication date |
---|---|
DE59600286D1 (de) | 1998-07-23 |
JPH09511307A (ja) | 1997-11-11 |
EP0774072A1 (de) | 1997-05-21 |
EP0774072B1 (de) | 1998-06-17 |
JP3883570B2 (ja) | 2007-02-21 |
DE19503621A1 (de) | 1996-08-08 |
CN1145657A (zh) | 1997-03-19 |
US5897302A (en) | 1999-04-27 |
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