WO2014206683A1 - Piston creux pour machine à plateau incliné et machine à plateau incliné - Google Patents

Piston creux pour machine à plateau incliné et machine à plateau incliné Download PDF

Info

Publication number
WO2014206683A1
WO2014206683A1 PCT/EP2014/061114 EP2014061114W WO2014206683A1 WO 2014206683 A1 WO2014206683 A1 WO 2014206683A1 EP 2014061114 W EP2014061114 W EP 2014061114W WO 2014206683 A1 WO2014206683 A1 WO 2014206683A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
sleeve
hollow piston
main body
cover
Prior art date
Application number
PCT/EP2014/061114
Other languages
German (de)
English (en)
Inventor
David Breuer
Frank Zehnder
Manfred Stoll
Matthias Greiner
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2014206683A1 publication Critical patent/WO2014206683A1/fr

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
    • F04B1/12—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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0082—Details
    • F01B3/0085—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0044—Component parts, details, e.g. valves, sealings, lubrication
    • F01B3/007—Swash plate

Definitions

  • the present invention relates to a hollow piston for a swash plate machine according to the preamble of claim 1 and a swash plate machine according to the preamble of claim 10.
  • Swash plate machines serve as axial piston pumps for converting mechanical energy into hydraulic energy and as axial piston motor for converting hydraulic energy into mechanical energy.
  • a cylindrical drum with piston bores is rotatably or rotatably mounted in the swash plate machine and pistons are arranged in the piston bores.
  • the pistons are mounted in the piston bores of the cylinder drum and are generally made of steel for strength reasons as a material.
  • hollow pistons are used, which are known in various designs.
  • a hollow piston which has a main body with a central integrated mandrel, wherein the central mandrel with a Central bore is provided.
  • the cavity in the piston is closed by a lid that is attached to the main body by a welding process.
  • a disadvantage of a hollow piston formed from two components is the complex production for the production of the central bore in the main body.
  • a piston overall unit with a closed cavity for a hydrostatic unit wherein the piston overall unit has a hollow piston body, a piston cover and an elongated rod.
  • the rod is formed either integrally with the piston body or integrally with the piston cover.
  • the manufacture of the integral rod disclosed herein has the disadvantage that an expensive deep hole drilling method for producing a through hole is required.
  • hollow pistons are also known, the covers of which are fastened to the piston body by a friction welding method, this method having disadvantages with regard to the increased material deposition at the connecting points which is necessary during the friction welding process.
  • the object of the invention is therefore to provide hollow piston and a swash plate machine with hollow piston, which are optimized in terms of their weight and which is inexpensive in terms of production and the choice of materials of the components.
  • the hollow piston for a swash plate machine comprises a main body and a lid disposed at one end of the main body so as to form a closed cavity therewith. Furthermore, the Hollow piston a centrically penetrating channel for the passage of a hydraulic fluid.
  • the channel is formed of a sleeve, which is formed as a separate component and a first end of the sleeve extends into an opening of the main body and the sleeve is connected to the first end of the sleeve with the main body and a second end of the Sleeve extends into an opening of the lid and the sleeve is connected to the lid on the cavity-facing surface of the lid.
  • the formation of the channel by a separate sleeve allows a simplification of the production of the hollow piston, since it can be made of three separate components (main body, cover and sleeve).
  • the individual components of the so-called built piston can be flexibly adapted to the respective stress during operation with regard to the choice of material. Furthermore, it is advantageous to manufacture the components separately, since simple and therefore cost-effective semi-finished products are sufficient for production.
  • the main body can be made, for example, as a deep-drawn part, wherein advantageously can be dispensed with the manufacturing step of the central bore.
  • the lid can be made for example as a turned part.
  • the sleeve can be obtained, for example, by the meter in the form of a tube, or be produced by a continuous casting process.
  • the components are interconnected so that the closed cavity pressure and hydraulic-tight.
  • the sleeve is connected to the main body and with the lid of the hollow piston in each case via a laser welding connection.
  • the lid also via a laser welding connection with the main body. This allows a reduction in weight compared with friction welded pistons, since a thickening of the Welds can be dispensed with. In addition, it is possible to dispense with holding washers necessary during friction welding.
  • the laser welds, or laser welds are introduced in the following order. After joining the sleeve in a hole in the lid, the sleeve is welded to the lid. Subsequently, the preassembled assembly consisting of lid and sleeve, merged with the main body, wherein the free part of the sleeve is inserted into an opening of the main body. Subsequently, the lid is welded to the main body. To stabilize the sleeve in the main body and for air- and fluid-tight sealing, the sleeve is welded to the main body. The welds arranged in this way have a favorable position with respect to the load of the hollow piston in the piston bores of the swashplate machine.
  • the sleeve is connected to the lid at a piston connection point, wherein this is arranged on a side facing away from the main body end of the lid and the piston connection point for indirect support of the hollow piston on a pivoting cradle of a swash plate machine is used.
  • the lid has three coaxially arranged on a longitudinal axis of the hollow piston bores with different diameters.
  • Bore has the largest diameter, wherein the inner surface of this first bore together with the inner surface of the main body partially forms the cavity of the hollow piston.
  • the diameter shall be interpreted in relation to the outer diameter of the piston so that the wall thickness of the hollow piston resists the loads occurring during operation of the swash plate machine.
  • the second bore has a smaller diameter than the diameter of the first bore and serves to receive the sleeve.
  • the second bore may advantageously have a diameter of 3 to 7 millimeters, in particular a diameter of 3.6 to 6 millimeters.
  • the second bore may for example be designed as a center hole of the first bore.
  • the resulting conical transition of the first to the second bore has an advantageous geometry for the laser weld between the sleeve and the lid.
  • the third bore advantageously has a smaller diameter than the diameter of the second bore and forms a passage from the channel to an opening of the piston joint.
  • the support surface of the piston connection point is increased, which provides for better sliding properties, such as a condyle in a bearing shell.
  • the diameter of the third bore (through-bore) must be designed so that a sufficient amount of hydraulic fluid is provided for lubrication of the piston joint.
  • the second bore has at the transition to the third bore a shoulder and this is arranged at a distance a to the opening of the piston connection point, while the distance is preferably between 1 and 10 millimeters, in particular between 2 and 8 millimeters. This distance ensures a stable effective surface, or wing at the piston joint.
  • the piston connection point is advantageously formed from a bearing cup.
  • the bearing cup forms the Gleitschuh technique and serves to accommodate a condyle, which supports the hollow piston indirectly via a sliding device on the pivoting cradle of the swash plate machine.
  • the piston connection point of the hollow piston can also be formed, for example, as a joint head or ball head. These are in a bearing cup, which indirectly via a sliding device supports the hollow piston on the pivoting cradle of the swash plate machine, recordable.
  • the swash plate machine according to the invention comprises a cylindrical drum rotatable about its axis of rotation or rotatably mounted with piston bores, with hollow piston according to the invention movably mounted in the piston bores and a pivoting cradle pivotally mounted about a pivot axis.
  • the weight of the swash plate machine can be significantly reduced by the use of the hollow piston according to the invention in a simple manner, so that thereby the friction between the hollow piston and the piston bores, in particular due to centrifugal forces, is reduced.
  • higher speeds are possible and the cost of producing the hollow pistons and, as a result, the swash plate machine can be significantly reduced.
  • the swash plate machine according to the invention can form, for example as a hydraulic motor and / or as a hydraulic pump, a hydraulic system and be used in a vehicle with a hydraulic hybrid drive.
  • the hydraulic hybrid drive may include, for example, an internal combustion engine, a hydraulic system with high and low pressure accumulator and a corresponding transmission.
  • FIG. 1 shows a longitudinal section of a swash plate machine according to the invention
  • FIG. 2 shows a longitudinal section of a first embodiment of the hollow piston according to the invention
  • FIG. 3 shows a longitudinal section of a second embodiment of the hollow piston according to the invention
  • FIG 4 shows a longitudinal section of a cover of the second embodiment of the hollow piston.
  • FIG. 1 shows a swash plate machine 1 according to the invention, as axial piston pump for conversion or conversion of mechanical energy (torque, speed) into hydraulic energy (flow, pressure) or as axial piston motor for conversion or conversion of hydraulic energy (flow rate, Pressure) in mechanical energy (torque, speed) can serve.
  • a drive shaft 9 is mounted rotatably or rotatably about a rotation axis 8 by means of a bearing 10 on a flange 21 of a one-part or multi-part housing 4 and with a further bearing 10 on the housing 4 of the swashplate machine 1.
  • a cylinder drum 5 is rotatably connected.
  • the cylinder drum can be slidably or firmly connected in the axial direction.
  • the drive shaft 9 and the cylinder drum 5 are formed in two parts, but may also be formed as a component.
  • the cylinder drum 5 carries out the rotational movement of the drive shaft 9 due to its non-rotatable connection with.
  • a plurality of piston bores 6 are incorporated, in which hollow piston 7 according to the invention are performed.
  • the longitudinal axes 35 of the piston Holes 6 and hollow piston 7 are aligned substantially parallel to the axis of rotation 8 of the drive shaft 9 and the cylinder drum 5.
  • In the piston bores 6 each have a hollow piston 7 is movably mounted.
  • Swivel cradle 14 is pivotally mounted about a pivot axis 15 on the housing 4.
  • the pivoting cradle 14 has a flat surface that includes a sliding device 18.
  • a plurality of sliding blocks 37 are arranged in this embodiment, and each sliding block 37 is connected to a respective hollow piston 7.
  • each slide shoe 37 has a ball joint 39, which is fastened in a bearing socket 59 on the hollow piston 7, so that a piston connection point 22 between the ball joint 39 and the bearing cup 59 is formed on the hollow piston 7 and the hollow piston 7 via the slide device 18 , or via the sliding block 37 is supported on the pivoting cradle 14.
  • the partially spherical joint ball 39 and bearing cup 59 are both complementary or spherical, so that in a corresponding movement possibility to each other between the ball joint 39 and the bearing cup 59 to the hollow piston 7 as possible a permanent connection between the hollow piston 7 and the sliding device is present , Due to the connection of the hollow piston 7 with the rotating cylinder drum 5 and the connection of the bearing cups 59 with the sliding blocks 37, the sliding blocks 37 perform a rotational movement about the axis of rotation 8.
  • the pivoting cradle 14 is pivotally mounted about the pivot axis 15 and has an opening 42 for the passage of the drive shaft 9.
  • the pivoting cradle 14 is adjustable via at least one pivoting device 24. The adjustment is made via adjusting piston 29th
  • the pivoting device 24 can be represented both by two adjusting piston 29 and by an adjusting piston 29 and an opposed piston.
  • the longitudinal section shown in FIG. 2 shows a first embodiment of the hollow piston 7 according to the invention.
  • the hollow piston 7 has a main body 17, and a lid 75, which is arranged at one end of the main body 17 such that it forms a closed cavity 62 with this.
  • the hollow piston 7 has a channel 61 penetrating it centrally for the passage of a hydraulic fluid.
  • the channel 61 provides a hydraulic connection between the piston bore 6 in the cylinder drum 5 of the bent axis machine 1 and the sliding device 18 on the pivoting cradle 14 (see Fig. 1).
  • the channel 61 is formed according to the invention from a sleeve 80, which is formed as a separate component and this is located centrally on the longitudinal axis 35 of the hollow piston 7.
  • the blank can be obtained from an arbitrarily produced tube, for example by means of continuous casting, can be dispensed with a costly method of deep hole drilling.
  • the hollow piston 7 is designed such that a first end 81 of the sleeve 80 extends into an opening 71 of the main body 17 and the sleeve 80 is connected at the first end 81 of the sleeve 80 to the main body 17 via a laser weld connection 90.
  • a second end 82 of the sleeve 80 extends into an opening 72 of the lid 75 and the sleeve 80 is connected to the lid 75 at a cavity 62 facing surface 76 of the lid 75 via a laser weld joint 91.
  • the laser welds 90, 91, 92 and laser welds are introduced in the following order.
  • the sleeve 80 is welded to the lid 75 on the laser weld joint 91.
  • the fit of the opening 72 of the lid 75 to the outer diameter of the sleeve 80 can be made as a press fit and the joining of the sleeve 80 can be performed by a press-fit to a measure to be adjusted.
  • the outer diameter of the sleeve is between 3 and 7 millimeters, preferably between 3.6 and 6 millimeters.
  • the cover 75 has at its end facing away from the main body 17, the piston connection point 22 for indirect support on the pivoting cradle 14.
  • the piston joint 22 is formed from the bearing cup 59, which serves to receive the condyle 39 of the shoe 37.
  • the joint head 39 supports indirectly via the sliding device 18 shown in FIG. 1, the hollow piston 7 on the pivoting cradle 14 from.
  • the lid 75 is connected to the main body 17 via a radial laser weld joint 92.
  • the laser welding connection 92 is designed such that the cavity 62 of the hollow piston 7 is closed pressure and hydraulic-tight.
  • Fig. 3 shows a second embodiment of the hollow piston 7 according to the invention and Fig. 4 shows a longitudinal section of the lid 75 of this embodiment.
  • the cover 75 has three coaxially arranged on the longitudinal axis 35 of the hollow piston 7 bores 73, 74, 65 with different diameters 83, 84, 85.
  • the first bore 73 has the largest diameter 83, wherein the inner surface of this first bore 73 together with the inner surface of the main body 17 partially forms the cavity 62 of the hollow piston 7.
  • the diameter 83 is designed in relation to the outer piston diameter such that the wall thickness of the hollow piston 7 withstands the loads occurring during operation of the swash plate machine 1.
  • the second bore 74 has a smaller diameter 84 than the diameter 83 of the first bore 73 and serves to receive the sleeve 80 in the lid 75.
  • the second bore 75 advantageously has a diameter of 3 to 7 millimeters, in particular a diameter of 3.6 to 6 millimeters.
  • the second bore 74 is executed in this embodiment as a center hole of the first bore 73.
  • the holes 73, 74 can also be designed as individual holes.
  • the resulting conical transition of the first 73 to the second bore 74 forms a surface 76, which has an advantageous geometry for the laser weld between the sleeve 80 and the lid 75.
  • the third bore 65 advantageously has a smaller diameter 85 than the diameter 84 of the second bore 74 and forms a passage from the channel 61 to an opening 23 of the piston joint 22.
  • the diameter 85 of the third bore 65 (through-bore) is designed such that that a sufficient amount of hydraulic fluid for lubrication of the piston joint 22 is provided.
  • the second bore 74 has at the transition to the third bore 65 a shoulder 87 and this is arranged at a distance a to the opening 23 of the piston joint 22.
  • the distance a is preferably between 1 and 10 millimeters, in particular between 2 and 8 millimeters. This distance a ensures a stable active surface, or support surface at the piston joint 22nd
  • FIG. 4 also shows that the shoulder 87 forms a stop for the sleeve 80 inserted in the cover 75.
  • the assembly of this embodiment of the hollow piston 7 is basically the same as the assembly of the first embodiment.
  • the paragraph 87 prevents unwanted pushing through the sleeve 80 in the bearing cup 59.
  • the sleeve 80 can be pressed as needed to measure in the second bore 74 of the lid 75 and then welded, without the sleeve is added to the paragraph. Alternatively, it can be joined up to the stop, or up to paragraph 87, wherein the press-in force is checked during the press-fitting process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Piston creux (7) pour machine à plateau incliné (1), comprenant un corps principal (17), une tête (75) qui est disposée à une extrémité du corps principal (17) de manière à former avec celui-ci une cavité (62) fermée, et un canal (61) traversant le piston creux (7) en son centre, destiné à guider un liquide hydraulique. Le canal (61) est formé d'un manchon (80) lequel se présente sous forme d'une pièce séparée. Une première extrémité (81) du manchon (80) s'étend dans une ouverture (71) du corps principal (17), le manchon (80) étant relié au corps principal (17) par ladite première extrémité (81). Une seconde extrémité (82) du manchon (80) s'étend dans une ouverture (72) de la tête (75), le manchon (80) étant relié à la tête (75) au niveau de la surface (76) de la tête (75) dirigée vers la cavité (62). Une machine à plateau incliné doté d'un tel piston creux (7) est également un objet de l'invention.
PCT/EP2014/061114 2013-06-24 2014-05-28 Piston creux pour machine à plateau incliné et machine à plateau incliné WO2014206683A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013211893.7 2013-06-24
DE201310211893 DE102013211893A1 (de) 2013-06-24 2013-06-24 Hohlkolben für eine Schrägscheibenmaschine und Schrägscheibenmaschine

Publications (1)

Publication Number Publication Date
WO2014206683A1 true WO2014206683A1 (fr) 2014-12-31

Family

ID=50828919

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/061114 WO2014206683A1 (fr) 2013-06-24 2014-05-28 Piston creux pour machine à plateau incliné et machine à plateau incliné

Country Status (2)

Country Link
DE (1) DE102013211893A1 (fr)
WO (1) WO2014206683A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5947954B1 (ja) * 2015-05-08 2016-07-06 川崎重工業株式会社 ピストン、及びそれを備える液圧回転機械

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620167C1 (de) 1996-05-20 1997-03-13 Brueninghaus Hydromatik Gmbh Hohlkolben mit radial verschweißtem Deckel
DE10109598A1 (de) * 2000-02-28 2001-09-20 Sauer Inc Kolben für einen hydrostatischen Zylinderblock
DE10135489A1 (de) 2000-07-20 2002-07-11 Sauer Danfoss Inc Kolben mit geschlossenem Hohlraum für hydrostatische Einheiten
EP1336756A2 (fr) * 2002-02-18 2003-08-20 Brueninghaus Hydromatik Gmbh Piston de pompe rempli de sphères creuses
EP1336449A2 (fr) * 2002-02-18 2003-08-20 Brueninghaus Hydromatik Gmbh Piston creux et procédé de sa fabrication par soudage, diffusion ou frittage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620167C1 (de) 1996-05-20 1997-03-13 Brueninghaus Hydromatik Gmbh Hohlkolben mit radial verschweißtem Deckel
DE10109598A1 (de) * 2000-02-28 2001-09-20 Sauer Inc Kolben für einen hydrostatischen Zylinderblock
DE10135489A1 (de) 2000-07-20 2002-07-11 Sauer Danfoss Inc Kolben mit geschlossenem Hohlraum für hydrostatische Einheiten
EP1336756A2 (fr) * 2002-02-18 2003-08-20 Brueninghaus Hydromatik Gmbh Piston de pompe rempli de sphères creuses
EP1336449A2 (fr) * 2002-02-18 2003-08-20 Brueninghaus Hydromatik Gmbh Piston creux et procédé de sa fabrication par soudage, diffusion ou frittage

Also Published As

Publication number Publication date
DE102013211893A1 (de) 2014-12-24

Similar Documents

Publication Publication Date Title
EP2217824B1 (fr) Piston pour un étrier de frein à disque
WO2018011346A1 (fr) Procédé de fabrication d'une cage pour un joint homocinétique à billes
DE102014007050A1 (de) Kolbenmaschine mit einem Pleuelschaft aus mehreren Teilen
DE102014109452A1 (de) Pleuelstange, Verfahren zur Herstellung derselben und Verbrennungsmotor
DE19706075C2 (de) Kolben für eine hydrostatische Maschine
WO2015036178A1 (fr) Machine à plateau inclinable en tant que pompe à pistons axiaux et/ou moteur à piston axiaux
WO2014206683A1 (fr) Piston creux pour machine à plateau incliné et machine à plateau incliné
DE102008064456A1 (de) Servolenkungsvorrichtung und deren Herstellungsverfahren
DE10218112B4 (de) Fahrzeugbremse
EP3055565A1 (fr) Machine à plateau incliné
EP3676495B1 (fr) Procédé de fabrication, ébauche de piston, piston et machine à pistons axiaux ayant ce piston
DE102014104950A1 (de) Hydrostatische Axialkolbenmaschine in Schrägachsenbauweise
DE10206728A1 (de) Hohlkolben und Verfahren zu dessen Herstellung durch Diffusionsschweißen oder Sintern
WO2014206682A1 (fr) Piston creux pour machine à plateau incliné et machine à plateau incliné
EP1225349B1 (fr) Procédé d'assemblage d'un joint à rotule
DE102017221468A1 (de) Brennkraftmaschine sowie Verfahren zum Betreiben einer Brennkraftmaschine
EP3309394B1 (fr) Procédé de fabrication d'un joint pivotant entre un piston et patin de crosse d'une machine à déplacement volumétrique hydrostatique
DE102013210414A1 (de) Hohlkolben für eine hydrostatische Kolbenmaschine
DE102013202295A1 (de) Schrägscheibenmaschine
WO2015070863A2 (fr) Dispositif de désaccouplement
WO2004076890A1 (fr) Boite de vitesses toroidale
DE102014211965A1 (de) Schrägscheibenmaschine
DE102015223215A1 (de) Übertragungsmodul
WO2015051969A1 (fr) Machine à plateau incliné
DE102017219026A1 (de) Verfahren zur Herstellung eines Gelenkgehäuses eines Kugelgelenks sowie Vorrichtung zum Bearbeiten eines Gelenkgehäuse eines Kugelgelenks und Gelenkgehäuse

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14726641

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14726641

Country of ref document: EP

Kind code of ref document: A1