EP3676495B1 - Herstellungsverfahren, kolbenrohling, kolben sowie axialkolbenmaschine mit dem kolben - Google Patents
Herstellungsverfahren, kolbenrohling, kolben sowie axialkolbenmaschine mit dem kolben Download PDFInfo
- Publication number
- EP3676495B1 EP3676495B1 EP18764996.7A EP18764996A EP3676495B1 EP 3676495 B1 EP3676495 B1 EP 3676495B1 EP 18764996 A EP18764996 A EP 18764996A EP 3676495 B1 EP3676495 B1 EP 3676495B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- blank
- section
- axial
- opening
- 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.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 238000007789 sealing Methods 0.000 claims description 46
- 238000001125 extrusion Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 23
- 238000003754 machining Methods 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000004049 embossing Methods 0.000 description 8
- 230000007704 transition Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000007514 turning Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 238000000641 cold extrusion Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/18—Making machine elements pistons or plungers
-
- 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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
- F04B27/0878—Pistons
-
- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
- F04B1/124—Pistons
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/18—Making machine elements pistons or plungers
- B21K1/185—Making machine elements pistons or plungers with cooling channels
Definitions
- the invention relates to a manufacturing method with the features of the preamble of claim 1. Furthermore, the invention relates to a piston blank, a piston and an axial piston machine with the piston.
- Axial piston machines which work as a pump and / or as a motor. Such axial piston machines have a plurality of so-called axial pistons. For example, the axial pistons are machined.
- the pamphlet DE 10 2004 061 863 A1 which probably describes the closest prior art, discloses a piston for a piston machine, in particular for an axial piston machine in bent axis design, comprising a conical section, a neck area and a ball head formed on the neck area, a recess formed in the piston and one in the recess trained cones.
- the document also discloses a method for producing the piston, the method comprising the steps of parting round material to the desired length, producing an inner contour by cold extrusion, preparing the outer contour by pre-turning, producing the outer contour by rotary kneading and reworking.
- the DE 20 2007 017 659 U1 describes a hydrostatic displacement unit with longitudinally displaceable pistons.
- a piston has a piston head, a piston skirt and a piston base.
- This piston has a through-hole and is manufactured using powder metallurgy.
- the DE 199 34 216 A1 discloses a hollow piston with an annular cavity for a piston engine and a method for its manufacture.
- the DE 10 2006 060015 A1 describes a hollow piston with an annular cavity for an axial piston machine
- the KR 2012 0037241 A discloses a piston with a ball head and a through hole.
- the invention is based on the object of proposing a production method which is characterized by inexpensive production of a piston blank or a piston. It is also an object of the invention to propose a corresponding piston blank, a piston and an axial piston machine with the piston.
- the invention relates to a production method which is used in particular to produce a piston blank for a piston and / or the piston.
- the piston blank is preferably an intermediate product and can be produced in further process steps to form the piston.
- the piston is preferably designed and / or suitable for an axial piston machine.
- the piston is particularly preferably designed as an axial piston and / or the axial piston machine is designed as an axial piston pump.
- the axial piston machine is designed and / or suitable for an agricultural machine.
- the axial piston machine is designed as an axial piston motor and can, for example, be integrated into a wheel hub of the agricultural machine.
- the piston can be accommodated in a cylinder bore of the axial piston machine and / or guided in a straight line.
- an intermediate blank is manufactured by extrusion.
- a blank preferably a solid body
- a shaft section and / or a spherical head section and / or a sealing section are preferably produced by the extrusion, so that the intermediate blank is formed.
- the extrusion produces a basic shape of the finished piston.
- an elevation running around the main axis in relation to the main axis is generated on the spherical head section by the extrusion. The elevation is formed in particular due to volume compensation during extrusion.
- the intermediate blank has the shaft section, the spherical head section and the sealing section.
- the spherical head section serves in particular for an articulated connection to a disk of the axial piston machine.
- the sealing section serves in particular to receive a sealant and / or to seal the piston against the cylinder bore.
- the shaft section connects the spherical head section with the sealing section.
- the spherical head section and the sealing section are molded directly onto the shaft section.
- the shaft section defines a main axis with its longitudinal axis and / or its axis of symmetry.
- the sealing section is preferably designed as a type of flange or collar which extends in the radial direction with respect to the main axis.
- the sealing section and / or the spherical head section can have a larger outer diameter than the shaft section.
- the shaft section preferably has a conical or cylindrical shape.
- a piston blank is produced.
- a through opening is made in the intermediate blank by machining.
- the through opening can be made in the intermediate blank by a cutting tool.
- the through opening is preferably made in the intermediate blank by milling or by drilling.
- the The cutting tool is moved in the axial direction with respect to the main axis through the sealing section, the shank section and the ball section with a feed rate, while the cutting tool rotates.
- the through opening extends within the piston blank in the longitudinal direction.
- the through opening is preferably designed as a through bore and / or a longitudinal bore and / or as a stepped bore.
- the through opening is particularly preferably arranged coaxially and / or concentrically to the main axis.
- the through opening preferably extends in the axial direction with respect to the main axis between the spherical section and the sealing section. In particular, the through opening penetrates the piston blank.
- the through opening can serve, for example, as a hydraulic relief.
- the advantage of the invention is that the extrusion of the intermediate blank significantly reduces the cost of post-machining to the finished part, in particular the piston.
- the piston blank already has a high surface quality and high component accuracy.
- a directed fiber course is established in the piston produced by flow process technology, which has a positive effect on the component properties, for example the component strength.
- the piston blank can be manufactured inexpensively by means of the manufacturing method according to the invention.
- an impression is produced in the spherical head section by the extrusion.
- the impression is designed as a countersink.
- the impression is preferably arranged coaxially and / or concentrically to the main axis.
- the embossing is attached to an axial end face of the spherical head section and preferably extends axially in the direction of the shaft section.
- the impression forms an exit for the through opening.
- the through opening is made separately in a subsequent machining process introduced into the intermediate blank.
- the embossing preferably has a larger diameter than the through opening, so that the embossing preferably forms a bevel on the through opening.
- the through opening of the piston blank opens inside the impression. This ensures that no burr occurs or is present on the axial end face of the spherical head section.
- the extrusion creates a recess in the sealing section.
- the recess is used in particular to reduce the weight of the piston.
- the shape of the intermediate blank and the recess and / or the embossing are preferably produced in one process step.
- the recess is designed as a conical and / or a cylindrical and / or a concave and / or a hemispherical depression.
- the recess is preferably arranged coaxially and / or concentrically to the main axis.
- the recess is attached to an axial end face of the sealing section and preferably extends axially in the direction of the shaft section.
- the recess forms an entry for the through opening.
- the recess preferably has a larger diameter than the through opening.
- the through opening is made in the intermediate blank in a bottom area of the recess.
- the advantage of the recess is preferably that a smaller mass has to be moved in the later application through the recess. As a result, the operating behavior of the axial piston machine in particular can be improved.
- a near net shape surface of the shaft section is produced by the extrusion on the intermediate blank.
- the near net shape surface is formed by a jacket surface of the shaft section.
- the near net shape surface is provided by a transition area between the shaft section and the sealing section and / or between the shaft section and the spherical head section educated.
- the transition area is preferably designed as a radius and / or a cone with which the shaft section merges onto the spherical head section and / or the sealing section.
- a near net shape end face of the sealing section is produced.
- the near-net-shape end face in relation to the main axis is formed by an axial end face of the sealing section.
- the end face is preferably designed as a circular ring surface.
- the extrusion produces a surface quality of the near net shape surface or end face which corresponds to the surface requirements of the finished piston.
- the near-net shape surface or end face therefore does not have to be reworked in the further machining processes, as a result of which the production costs of the piston are significantly reduced.
- the surface properties of the near-net-shape surfaces and the fiber orientation in the interior of the piston blank or piston form clear identifying features for a piston produced by extrusion.
- a spherical cap geometry is produced on a circumferential surface of the sealing section by machining on the intermediate blank or on the piston blank.
- the spherical cap geometry prevents the piston from wedging in the cylinder bore of the axial piston machine.
- the dome geometry is preferably designed as a rotationally symmetrical outer surface of a spherical segment.
- the spherical cap geometry is particularly preferably manufactured by turning.
- the spherical cap geometry and the through opening are produced in a common machining process.
- a piston is produced in a further method step.
- the piston is designed as the axial piston for the axial piston machine.
- the piston is manufactured by reworking the piston blank.
- the post-processing is preferably used to change the material properties and / or the geometrical properties Properties and / or the surface quality of the piston blank, so that the piston is formed.
- the piston blank is hardened in a first sub-step of the further process step.
- a tolerance compensation for example an opening or a change in dimension of the piston blank due to the hardening process, is already taken into account during the production of the intermediate blank.
- the extrusion tool is preferably designed in accordance with the tolerance compensation.
- the surfaces not to be reworked preferably the near net shape surface of the shaft section and / or the near net shape end face of the sealing section, are undersized so that the areas not to be reworked correspond to the final contour after the hardening process.
- the spherical geometry of the spherical head section and the dome geometry of the sealing section are machined.
- the dome geometry and the spherical geometry are preferably machined in a common machining process.
- the spherical shape and the spherical shape are machined in two separate machining processes.
- the spherical geometry and / or the dome geometry are machined by hard turning and / or by grinding and / or by superfinishing.
- the circumferential elevation of the spherical head section is removed.
- at least one groove running around the axis of rotation for receiving the sealing means is made in the sealing section.
- the piston blank is extruded and has the shaft section, the spherical head section and the sealing section, the shaft section connecting the spherical head section to the sealing section and an impression in the spherical head section being produced by the extrusion. Furthermore, the piston blank has the through-opening introduced by machining, the through-opening being inside of the piston blank extends in the longitudinal direction and wherein the indentation forms an outlet for the through opening.
- the piston blank is produced according to the production method as already described above.
- the piston blank can have the recess and / or the spherical cap geometry and / or the near-net-shape surface of the shaft section and / or the near-net-shape end face of the sealing section.
- the piston is designed and / or suitable for an axial piston machine.
- the piston is hardened.
- the surface of the shaft section and / or the end face of the sealing section correspond to the final contour of the piston after the hardening process.
- the spherical geometry of the spherical head section and the spherical geometry of the sealing section are machined.
- the piston blank is produced according to the production method as already described above.
- the piston can have the impression and / or the recess and / or the spherical cap geometry.
- the piston is designed as an axial piston.
- the axial piston machine is designed as an axial piston pump or an axial piston motor.
- the axial piston pump converts mechanical energy into hydraulic energy in particular.
- the axial piston motor converts hydraulic energy into mechanical energy in particular.
- These axial piston machines can comprise a housing in which a rotor and a disk each rotate about an axis of rotation, the two axes of rotation forming an angle so that the rotor is angled relative to the disk.
- the rotor each has one or more cylinder bores for receiving the piston.
- the piston is, on the one hand, received in an articulated manner with the disk, for example via a ball head, and, on the other hand, guided in the receptacle of the piston.
- the axial piston machine is preferably designed as a bent axis machine or a swash plate machine or a swash plate machine.
- the axial piston machine has more than two, preferably more than four, especially more than eight of the pistons.
- the axial piston machine preferably has an odd number of pistons.
- Figure 1 shows in a sectional view an axial piston machine 1, which is designed and / or suitable for an agricultural or construction machine, for example.
- the axial piston machine 1 is designed as a bent axis pump, which preferably converts mechanical energy into hydraulic energy.
- the axial piston machine 1 has several pistons 2, a rotor 3 and a disk 4.
- the axial piston machine 1 has, for example, nine of the pistons 2, the pistons 2 being designed as axial pistons.
- the pistons 2 are articulated to the disk 4 via a ball joint 5.
- the rotor 3 When the axial piston machine 1 is in operation, the rotor 3 rotates about a first axis of rotation R1.
- the rotor 3 is designed as a piston housing and for this purpose has a plurality of cylinder bores 6, each piston 2 being movably arranged in one of the cylinder bores 6 and in the axial direction with respect to the Axis of rotation R is straight.
- the cylinder bores 6 are arranged at a uniform distance from one another around the axis of rotation R.
- the disk 4 rotates about a second axis of rotation R2, the first and second axes of rotation R1, R2 intersecting, so that the rotor 3 is arranged at an angle relative to that of the disk 4.
- the pistons 2 are moved back and forth in the cylinder bores 6, so that they convey a hydraulic fluid, for example.
- Figure 2 shows an intermediate blank 7 of the piston 2 from FIG Figure 1 , in a longitudinal section along a main axis H.
- the intermediate blank 7 is produced, for example, from a blank, for example from a solid material with a round cross-section, by extrusion using an extrusion tool.
- the extrusion tool comprises a punch and a die.
- the intermediate blank 7 has a spherical head section 7a, a shaft section 7b and a sealing section 7c.
- the shaft section 7b connects the spherical head section 7a and the sealing section 7c directly to one another, the intermediate blank 7 being extruded.
- the spherical head section 7a has an indentation 8, which is shown in the detail view A.
- the indentation 8 is designed as a countersink and is arranged coaxially and / or concentrically to the main axis H on an axial end face of the spherical head section 7a.
- the spherical head section 7a has an elevation running around the main axis H, which is shown in the detail view B.
- the die of the extrusion tool has a circumferential groove, which serves as a volume compensation for excess material.
- the blank has, for example, a slight oversize, with the excess material being able to escape into the groove of the die during extrusion, so that the elevation 9 is formed.
- the sealing section 7c is designed in relation to the main axis H as a circumferential collar which extends radially outward.
- the sealing section 7c has a recess 10, which is shown in the detailed view C.
- the recess 10 is designed as a cylinder countersink with an inwardly curved base area.
- the recess 10 is arranged coaxially and / or concentrically to the main axis H on an axial end face of the sealing section 7c.
- the recess 10 serves to reduce the weight of the piston 2 and for this purpose extends over, for example, more than 60%, preferably more than 70%, in particular more than 80% of the end face of the sealing section 13.
- the embossment 8, the elevation 9 and the recess 10 can be produced together by the extrusion in one process step together with the shaping of the intermediate blank 7.
- the shaft section 7b has a cylindrical shape, the shaft section 7b being connected to the spherical head section 7a in a first transition region 11a via a radius. In a second transition region 11b, the shaft section 7b is connected to the sealing section 7c via a conical widening running in the direction of the sealing section 7c and via a further radius.
- the first and the second transition area 11a, b and the outer surface of the cylindrical form a near net shape surface 12 of the shaft section 7b.
- the sealing section 7c has a near-net-shape end face 13 on its axial end face in relation to the main axis H.
- the end face 13 is designed as a circular ring surface and is delimited in the radial direction by the recess 10.
- the near-net-shape surface 12 and the near-net-shape end face 13 are produced by extrusion and, for example, have the final contour of the finished piston 2 after the extrusion process.
- the surface 12 and the end face 13 preferably already have a sufficiently high surface quality and / or component accuracy after the extrusion, so that the surface 12 and the end face 13 no longer have to be reworked.
- the Figure 3 shows a piston blank 14, the piston 2 from FIG Figure 1 , in a longitudinal section along the main axis H.
- the piston blank 14 has a Through opening 15 which extends within the piston blank 14 in the axial direction with respect to the main axis H.
- the through opening 15 is machined into the intermediate blank 7.
- the through opening 15 is arranged coaxially and / or concentrically to the main axis H.
- the through opening 15 is designed as a stepped through hole and extends from the recess 10 in the direction of the embossing 8.
- the recess 10 forms an entry and the embossing 8 an exit for the through opening 15.
- the through opening 15 opens within the embossing 8 or in the area of a bevel of the embossing 8, as shown in the detail view D. This ensures that there is no burr on the end face of the spherical section 7a through the bore exit.
- the sealing section 7c has a spherical cap geometry 16 on a circumferential surface, which is shown in the detailed view F.
- the dome geometry 16 is used, for example, to prevent the piston 2 from wedging in the piston receptacle 6.
- the circumferential surface of the sealing section 7c of the intermediate blank 7 is machined so that the spherical cap geometry 16 is generated.
- the through hole 15 and the spherical cap geometry can be produced in a common machining process on the intermediate blank 7, so that the piston blank 14 is formed.
- the piston blank 14 is hardened, for example, before the spherical section 7a, in particular a spherical geometry 17, and the sealing section 7c, in particular the spherical cap geometry 16, are machined to their final contour.
- the spherical geometry 17 and the spherical cap geometry 16 are processed by a hard turning, grinding and / or superfinishing process.
- the elevation 9 is removed and / or a sealant receptacle, which is designed to receive at least one piston ring, for example, is introduced in the area of the spherical cap geometry 16.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Details Of Reciprocating Pumps (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017119967.5A DE102017119967A1 (de) | 2017-08-31 | 2017-08-31 | Herstellungsverfahren, Kolbenrohling, Kolben sowie Axialkolbenmaschine mit dem Kolben |
PCT/DE2018/100729 WO2019042495A1 (de) | 2017-08-31 | 2018-08-22 | Herstellungsverfahren, kolbenrohling, kolben sowie axialkolbenmaschine mit dem kolben |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3676495A1 EP3676495A1 (de) | 2020-07-08 |
EP3676495B1 true EP3676495B1 (de) | 2021-06-02 |
Family
ID=63490131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18764996.7A Active EP3676495B1 (de) | 2017-08-31 | 2018-08-22 | Herstellungsverfahren, kolbenrohling, kolben sowie axialkolbenmaschine mit dem kolben |
Country Status (7)
Country | Link |
---|---|
US (1) | US11213880B2 (pt) |
EP (1) | EP3676495B1 (pt) |
CN (1) | CN111033037B (pt) |
BR (1) | BR112019004951B1 (pt) |
DE (1) | DE102017119967A1 (pt) |
DK (1) | DK3676495T3 (pt) |
WO (1) | WO2019042495A1 (pt) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019104700A1 (de) * | 2019-02-25 | 2020-08-27 | Schaeffler Technologies AG & Co. KG | Kolben, Axialkolbenmaschine und Verfahren zur Herstellung eines Kolbens |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3204264A1 (de) * | 1982-02-08 | 1983-08-18 | Char'kovskij politechničeskij institut imeni V.I. Lenina, Char'kov | Mehrteiliger kolben fuer hydraulische verdraengungsmaschinen und verfahren zu dessen herstellung |
US4494448A (en) * | 1982-02-23 | 1985-01-22 | Vsesojuzny Nauchno-Issledovatelsky I Proektno-Konstruktorsky Institut Promyshelennykh Gidroprivodov I Girodoavtomatiki | Composite piston of positive displacement hydraulic machine and method for manufacturing same |
US5642654A (en) * | 1994-09-01 | 1997-07-01 | Sundstrand Corporation | Piston and method of manufacturing the same |
DE19934216A1 (de) * | 1999-07-21 | 2001-02-01 | Brueninghaus Hydromatik Gmbh | Hohlkolben für eine Kolbenmaschine und Verfahren zum Herstellen eines Hohlkolbens |
DE19938046A1 (de) * | 1999-08-12 | 2001-03-08 | Brueninghaus Hydromatik Gmbh | Hohlkolben für eine Kolbenmaschine und Verfahren zum Herstellen eines Hohlkolbens |
US6318242B1 (en) | 1999-10-26 | 2001-11-20 | Sauer-Danfoss Inc. | Filled hydraulic piston and method of making the same |
DE10341791B4 (de) * | 2003-09-10 | 2005-09-29 | Brueninghaus Hydromatik Gmbh | Hohlkolben für eine Kolbenmaschine und Verfahren zum Herstellen eines Hohlkolbens |
DE102004013181B3 (de) * | 2004-03-17 | 2005-09-22 | Federal-Mogul Nürnberg GmbH | Kolben für einen Verbrennungsmotor, Verfahren zur Herstellung eines Kolbens sowie Verwendung einer Kupferlegierung zur Herstellung eines Kolbens |
DE102004061863A1 (de) * | 2004-12-22 | 2006-07-06 | Brueninghaus Hydromatik Gmbh | Kolben für Axialkolbenmaschine in Schrägachsenbauweise und Verfahren zur Herstellung solcher Kolben |
DE102006060015A1 (de) * | 2006-12-19 | 2008-06-26 | Robert Bosch Gmbh | Hohlkolben für eine Axialkolbenmaschine |
DE202007017659U1 (de) * | 2007-12-18 | 2008-04-17 | Sauer-Danfoss Gmbh & Co Ohg | Hydrostatische Verdrängereinheit |
KR101233419B1 (ko) * | 2010-10-11 | 2013-02-13 | (주) 디유티코리아 | 펌프 피스톤 |
-
2017
- 2017-08-31 DE DE102017119967.5A patent/DE102017119967A1/de not_active Withdrawn
-
2018
- 2018-08-22 BR BR112019004951-7A patent/BR112019004951B1/pt active IP Right Grant
- 2018-08-22 US US16/643,532 patent/US11213880B2/en active Active
- 2018-08-22 CN CN201880051415.8A patent/CN111033037B/zh active Active
- 2018-08-22 DK DK18764996.7T patent/DK3676495T3/da active
- 2018-08-22 EP EP18764996.7A patent/EP3676495B1/de active Active
- 2018-08-22 WO PCT/DE2018/100729 patent/WO2019042495A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
DK3676495T3 (da) | 2021-08-09 |
WO2019042495A1 (de) | 2019-03-07 |
BR112019004951B1 (pt) | 2023-11-07 |
BR112019004951A2 (pt) | 2019-06-25 |
US20200346278A1 (en) | 2020-11-05 |
EP3676495A1 (de) | 2020-07-08 |
US11213880B2 (en) | 2022-01-04 |
DE102017119967A1 (de) | 2019-02-28 |
CN111033037B (zh) | 2022-05-10 |
CN111033037A (zh) | 2020-04-17 |
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