[go: up one dir, main page]

WO2013098582A1 - Ensemble palier et machine électrique tournante comprenant un tel palier - Google Patents

Ensemble palier et machine électrique tournante comprenant un tel palier Download PDF

Info

Publication number
WO2013098582A1
WO2013098582A1 PCT/IB2011/003319 IB2011003319W WO2013098582A1 WO 2013098582 A1 WO2013098582 A1 WO 2013098582A1 IB 2011003319 W IB2011003319 W IB 2011003319W WO 2013098582 A1 WO2013098582 A1 WO 2013098582A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing assembly
sensor body
housing
fixed element
assembly according
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.)
Ceased
Application number
PCT/IB2011/003319
Other languages
English (en)
Inventor
Sylvain Chaussat
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.)
SKF AB
Original Assignee
SKF AB
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 SKF AB filed Critical SKF AB
Priority to PCT/IB2011/003319 priority Critical patent/WO2013098582A1/fr
Publication of WO2013098582A1 publication Critical patent/WO2013098582A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/042—Housings for rolling element bearings for rotary movement
    • F16C35/045—Housings for rolling element bearings for rotary movement with a radial flange to mount the housing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G01P1/026—Housings for speed measuring devices, e.g. pulse generator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Definitions

  • This invention relates to a bearing assembly for rotatively holding a rotatable element with respect to a fixed element.
  • a bearing assembly includes, amongst others, at least one sensor adapted to detect a rotation parameter of an encoder washer.
  • This invention also relates to an electric machine, such as an electric motor, including, amongst others, a bearing assembly as mentioned here-above.
  • a bearing comprises an inner ring and an outer ring adapted to rotate around a rotation axis, one with respect to the other.
  • the two rings are in sliding contact.
  • several rolling bodies are installed between the two rings. These rolling bodies can be balls, rollers or needles.
  • a rolling bearing can be, for instance, a ball bearing, a roller bearing or a needle bearing.
  • a tachometer In the field of bearings, it is known to use a tachometer in order to determine the rotation speed of a shaft supported by a bearing with respect to a supporting member, such as the casing of an electric machine.
  • a supporting member such as the casing of an electric machine.
  • EP-A-1 933 155 one can use an encoder washer with magnetic poles fast in rotation with a rotating ring of a bearing, and one or several sensors distributed around the encoder washer or located in front of it.
  • An air gap is provided between the encoder washer and the or each sensor. Detection of a rotation parameter of the encoder washer occurs through this air gap, thanks to the variation of a magnetic field generated by the encoder washer.
  • a key point for an efficient detection of rotation parameter is that the sensors should be positioned with respect to rotation axis of the encoded washer with the greatest accuracy. This cannot be guaranteed with the devices of the prior art, in so far as the sensor body in which the or each sensor are integrated is generally mounted in a mounting flange, which is itself mounted on a housing of the fixed element of the bearing assembly. This induces a relatively long chain of dimensions and the mounting inaccuracies may reduce the accuracy of the detection of the rotation parameters.
  • the invention aims at solving these problems with a new bearing assembly, whose mounting of the sensor body allows a better accuracy of the detection of a rotation parameter of an encoded washer.
  • the invention concerns a bearing assembly for rotatively holding a rotatable element with respect to a fixed element, said bearing assembly comprising a bearing with a rotatable ring and a fixed ring to be immobilized within a housing of the fixed element, an encoded washer fast in rotation with the rotatable ring, at least one sensor adapted to detect at least one rotation parameter of the encoder washer and a sensor body for holding said sensor.
  • the sensor body is centered with respect to the fixed element by a direct contact with the housing of the fixed element.
  • the sensor body which holds the or each sensor of the bearing assembly, is directly positioned with respect to the housing of the support member. This reduces the chain of dimensions of the bearing assembly and the mounting inaccuracies which may occur. The accuracy of the detection of the rotating parameter is therefore improved.
  • the words “axial”, “radial”, “axially” and “radially” relate to the axis of rotation of the rotatable ring with respect to the fixed ring of the bearing or the axis of rotation of the encoder washer.
  • a direction is “axial” when it is parallel to such an axis and “radial” when it is perpendicular to and secant with such an axis.
  • a surface is “axial” when it is perpendicular to an axial direction and “radial” when it is perpendicular to a radial direction and centered on the axis of rotation.
  • a “radially inner” part is closer to this axis, along a radial direction, than a “radially outer” part.
  • a rotation parameter is representative of the rotation movement of the encoder washer. Such a parameter can be an angle, a speed, a displacement, an acceleration or a vibration.
  • this bearing assembly can incorporate one or several of the following features, taken in any admissible configuration:
  • the bearing assembly comprises an annular flange for mounting the sensor body with respect to the fixed ring, the flange comprising a magnetic protection skirt axially extending between the sensor body and the housing of the fixed element, whereas the sensor body comprises portions which radially protrude through the magnetic protection skirt of the flange to make a direct contact with the housing of the fixed element.
  • a cylindrical surface of the sensor body comprises radially extending positioning bosses, whereas the magnetic protection skirt comprises openings angularly aligned with the bosses and whereas the bosses make a direct contact with a cylindrical surface of the housing of the fixed element.
  • the sensor body comprises three positioning bosses regularly distributed around its circumference. - The diameter of a circle passing on the edges of the bosses equals the diameter of a cylindrical surface of the housing of the fixed element.
  • the sensor body comprises an elastically deformable portion, and whereas when the elastically deformable portion is in its unstressed state, the diameter of a circle passing on the edges of the bosses is dimensioned relative to the diameter of the cylindrical surface of the housing of the fixed element so that said elastically deformable portion exerts an elastic reaction force on the housing when the sensor body is mounted.
  • the elastically deformable portion comprises a slotted hole extending on an angular sector of the sensor body and aligned with a boss.
  • the elastically deformable portion further comprises a radial slot extending from the slotted hole to the edge of the boss with which the slotted hole is aligned.
  • the sensor body comprises a cylindrical surface adapted to be mounted in and against a cylindrical surface of the housing of the fixed element.
  • the sensor body is immobilized on the fixed element by screws.
  • the sensor body is made of a synthetic material.
  • the rotatable element is a shaft.
  • the fixed element is a support member.
  • the fixed ring is the outer ring of the bearing.
  • the encoder washer is fast in rotation with the inner ring of the bearing.
  • the invention also concerns a rotary electric machine, such as an electric motor, having a casing supporting a rotating shaft.
  • this rotary electric machine includes at least one bearing assembly as mentioned here-above.
  • FIG. 1 is a perspective exploded view of a support member, a shaft and a bearing assembly according to the invention
  • FIG. 2 is a front view of a sensor body belonging to the bearing assembly according to the invention, mounted in a mounting flange,
  • figure 3 is a sectional view at a larger scale along plane III of the sensor body of figure 2
  • figure 4 is a sectional view along plane IV of the bearing assembly of figure 1 ,
  • - figure 5 is a perspective view of the sensor body of figures 2 and 3
  • - figures 6 and 7 are front views of sensor bodies belonging to bearing assemblies according to a second embodiment of the invention
  • FIG. 8 is a perspective view of a sensor body belonging to a third embodiment of the invention, mounted on a support member,
  • figure 9 is a sectional view along plane IX of the sensor body of figure 8.
  • the rolling bearing assembly A represented on the figures is used to rotatively hold a rotatable shaft 2 with respect to a support member 4 forming part of the casing 6 of a non further represented electric motor M.
  • Rotatable shaft 2 has a corrugated central opening 2A which is centered on an axis X2 and adapted to accommodate a nonrepresented shaft extending within casing 6 and supporting a rotor of motor M.
  • Figure 1 shows support member 4 mounted on casing 6.
  • these two parts can be integral with each other.
  • Bearing assembly A includes a ball bearing 10 with a fixed outer ring 12 and a rotatable inner ring 14. Some balls 16 are located in a rotation chamber 18 defined between respective raceways of rings 12 and 14, as shown on figures 3 and 4.
  • X10 denotes the rotation axis of inner ring 4 with respect to outer ring 12 in bearing 10. In mounted configuration of bearing assembly A, axis X10 is superimposed with a central axis XA of bearing assembly A.
  • Support member 4 is provided with a circular opening 4A centered on an axis X4 which is superimposed with axis XA in mounted configuration of bearing assembly A with respect to support member 4.
  • Bearing assembly A also includes a snap ring or circlip 20 which is accommodated within an inner circumferential groove 4B of support member 4, next to housing 4A.
  • snap ring 20 holds bearing 10 within housing 4A.
  • Snap ring 20 is optional and can be omitted in an alternative embodiment, e.g. when outer ring 12 is press-fitted within housing 4A.
  • Bearing assembly A also includes a spacer ring 30 adapted to be mounted on an outer collar 4C of support member 4 via six screws 40.
  • Spacer ring 30 has a flat side surface 32 which is oriented opposite to support member 4 when spacer ring 30 is mounted onto support member 4.
  • Spacer ring 30 is optional insofar as it can be omitted if support member 4 has a flat surface analogous to surface 32.
  • Bearing assembly A also includes an encoder washer 50 formed of a bipolar permanent magnet ring 52 and a ferromagnetic armature 54.
  • Encoder washer 50 is fixedly mounted on inner ring 14. This is obtained by engaging an annular skirt 542 of armature 54 within a radial inner groove 142 of inner ring 14.
  • Bearing assembly A also includes several sensors adapted to detect a rotation parameter of encoder washer 50.
  • One of these sensors is visible on figure 4 with reference 60.
  • several sensors can be distributed around axis XA.
  • These sensors 60 are installed within a sensor body 70 formed of a printed circuit board 72 and a synthetic ring 74 provided with respective housings for the sensors 60.
  • An electric cable 76 is connected to PCB 72 and enables to feed it with electric power and convey output signals of sensors 60.
  • Bearing assembly A also includes an annular flange 80 which is designed to be mounted onto spacer ring 30 and support member 4 thanks to the set of screws 40.
  • flange 80 includes a radially external flat annular band 81 provided with several oblong holes 82 adapted to be aligned with respective holes 34 of spacer ring 30 and threaded holes 4D of support member 4. Screws 40 are used to immobilize flange 80 on spacer ring 30 and support member 4. The fact that openings 82 are oblong allows to adjust the angular orientation of flange 80, around axis XA, with respect to items 4 and 30.
  • Items 2, 4, 12, 14, 16, 20 and 80 are made of ferromagnetic materials, such as steel.
  • X30, X50, X70 and X80 respectively denote the central axis of spacer ring 30, encoder washer 50, sensor body 70 and flange 80. These axes and axis X2 are superimposed with axis XA in the mounted configuration of bearing assembly A.
  • Flange 80 has a bottom wall 83 which is parallel to band 81 and perpendicular to axis X80. Bottom wall 83 is radially inside band 81 and offset, along axis X80, with respect to band 81 .
  • a circular wall 84 connects these two parts of flange 80 which is integral.
  • the face of flange 80 visible on figure 1 is the outer face of this flange, insofar as it is oriented towards the outside of bearing assembly A in the mounted configuration.
  • the inside face of flange 80 is visible on figures 2 and 5.
  • the inner radial edge of flange 80 is defined by a first skirt 85 which is cylindrical, circular and centered on axis X80. This skirt extends, along axis X80, from bottom wall 83 towards a free circular edge 852 visible from the inside face of flange 80.
  • skirt 86 can be circular and continuous around axis X80. In such a case, its free edge follows the phantom lines on figure 2.
  • Skirt 85 is radially inside skirt 86.
  • skirt 85 is a radially inner skirt and skirt 86 is a radially outer skirt with respect to axis X80.
  • the synthetic ring 74 of sensor body 70 comprises an outer peripheral cylindrical surface 740 centered on axis X2. This surface comprises radially extending positioning bosses 742, which protrude from a base contour R of peripheral surface 740.
  • Synthetic ring 74 comprises three bosses 742, which are regularly distributed on the circumference of synthetic ring 74.
  • the edges 744 of bosses 742 define together a circle centered on axis X2 and which has a diameter D744 superior to diameter D740 of the base contour of peripheral surface 740.
  • peripheral surface 740 may comprise more than three bosses 742.
  • the outer diameter D744 of edges 744 of bosses 742 corresponds to the inner diameter of inner surface 4A1 so that sensor body 70 is mounted in housing 4A with a sliding fit.
  • the fact that sensor body 70 makes a direct contact with housing A through bosses 742 reduces the radial chain of dimension of the mounting of sensor body 70 and thus allows a greater accuracy of the detection of rotation parameter of encoder washer 50.
  • skirt 86 is slightly inferior to diameter D744, so that the only contact between, on the one hand, sensor body 70 and flange 80 and, on the other hand, housing 4A is made through bosses 742.
  • the mounting of sensor body 70 in housing 4A is made with a sliding fit.
  • one of the bosses 742 can be elastically deformable.
  • This elastically deformable portion 745 comprises a slotted hole 746, which extends on an angular sector of synthetic ring 74 in the vicinity of one of the bosses 742.
  • This slotted hole 746 allows an elastic deformation of synthetic ring 74 by radial compression.
  • edges 744 of bosses 742 define a circle whose diameter D744 is slightly superior to the inner diameter of cylindrical surface 4A1 , when elastically deformable portion 745 is in an unstressed state.
  • This unstressed state means that no compression force is exerted radially to the bosses 742 on the vicinity of which slotted hole 746 is provided.
  • elastically deformable portion 745 of synthetic ring 74 can comprise a radial slot 748 extending from slotted hole 746 to edge 744 of the corresponding bosses 742.
  • This slot 748 permits to increase the elastically deformable property of synthetic ring 74 and to improve the cancellation of the clearance between sensor body 70 and housing 4A.
  • bearing assembly A does not comprise any annular flange 80 and sensor body 70 is directly fixed to support member 4.
  • sensor body 70 comprises a cylindrical surface 78 which is mounted in and against inner cylindrical surface 4A1 so that these cylindrical surfaces are in direct contact. As in the first embodiment, this permits to reduce the radial chain of dimensions between sensor body 70 and support member 4 and therefore to improve the accuracy of the detection of the rotation parameter.
  • sensor body 70 is equipped with fixation means such as holes 79 for passing the set of screws 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

L'invention porte sur un ensemble palier (A) destiné à maintenir de façon rotative un élément rotatif (2) par rapport à un élément fixe (4), qui comprend un palier (10) comportant une bague tournante (14) et une bague fixe (12) à immobiliser dans un boîtier (4A) de l'élément fixe (4), une rondelle codée (50) solidaire en rotation avec la bague tournante (14), au moins un capteur (60) adapté à détecter au moins un paramètre de rotation de la rondelle codée (50) et un corps de capteur (70) destiné à tenir ledit capteur (60). Le corps de capteur (70) est centré par rapport à l'élément fixe (4) par un contact direct avec le boîtier (4A) de l'élément fixe (4).
PCT/IB2011/003319 2011-12-28 2011-12-28 Ensemble palier et machine électrique tournante comprenant un tel palier Ceased WO2013098582A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2011/003319 WO2013098582A1 (fr) 2011-12-28 2011-12-28 Ensemble palier et machine électrique tournante comprenant un tel palier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2011/003319 WO2013098582A1 (fr) 2011-12-28 2011-12-28 Ensemble palier et machine électrique tournante comprenant un tel palier

Publications (1)

Publication Number Publication Date
WO2013098582A1 true WO2013098582A1 (fr) 2013-07-04

Family

ID=45787235

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2011/003319 Ceased WO2013098582A1 (fr) 2011-12-28 2011-12-28 Ensemble palier et machine électrique tournante comprenant un tel palier

Country Status (1)

Country Link
WO (1) WO2013098582A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006115162A1 (fr) * 2005-04-21 2006-11-02 Ntn Corporation Palier équipé d’un capteur rotatif
EP1933155A1 (fr) 2006-12-15 2008-06-18 Aktiebolaget SKF Dispositif de palier à roulement équipé d'un capteur de vitesse.
FR2918221A1 (fr) * 2007-06-29 2009-01-02 Skf Ab Systeme de support d'arbre pour moteur electrique, moteur electrique et procede de montage.
WO2010116206A1 (fr) * 2009-04-07 2010-10-14 Aktiebolaget Skf Ensemble palier à roulement comportant des moyens de détection de rotation, et dispositif équipé d'un tel ensemble

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006115162A1 (fr) * 2005-04-21 2006-11-02 Ntn Corporation Palier équipé d’un capteur rotatif
EP1933155A1 (fr) 2006-12-15 2008-06-18 Aktiebolaget SKF Dispositif de palier à roulement équipé d'un capteur de vitesse.
FR2918221A1 (fr) * 2007-06-29 2009-01-02 Skf Ab Systeme de support d'arbre pour moteur electrique, moteur electrique et procede de montage.
WO2010116206A1 (fr) * 2009-04-07 2010-10-14 Aktiebolaget Skf Ensemble palier à roulement comportant des moyens de détection de rotation, et dispositif équipé d'un tel ensemble

Similar Documents

Publication Publication Date Title
US9127718B2 (en) Rotation detection set and bearing assembly comprising such a detection set
US8258659B2 (en) Shaft support system for electric motor, electric motor and method for making same
JP5870607B2 (ja) レゾルバ及びレゾルバ付き転がり軸受装置
US20080101741A1 (en) Wheel bearing assemblies incorporating sensing arrangements
WO2010116207A1 (fr) Ensemble palier à roulement ayant une rondelle de codage et un capteur et moteur électrique équipé d'un tel ensemble
EP2433144B1 (fr) Élément support, dispositif de rotation comprenant un tel support, et ensemble de roulement à billes comprenant un tel dispositif de détection
US9371862B2 (en) Bearing assembly and rotary electric machine comprising such a bearing
US6227710B1 (en) Rolling bearing with information sensor
GB2382142A (en) Wheel bearing assemblies incorporating sensing arrangements
WO2013098582A1 (fr) Ensemble palier et machine électrique tournante comprenant un tel palier
WO2010116208A1 (fr) Bague pour système de palier de roulement et système de palier de roulement comprenant cette bague
US20100117633A1 (en) Angular position sensor for assembly on a rotating shaft
WO2012085617A1 (fr) Ensemble de roulement avec rondelle codeuse et unité de capteur
WO2011121384A1 (fr) Ensemble roulement pourvu d'une cible et d'un capteur, et procédé de montage d'un tel ensemble roulement sur une structure
WO2013098584A1 (fr) Ensemble palier et machine électrique tournante comportant un tel palier
WO2013098583A1 (fr) Ensemble palier et machine électrique tournante comprenant un tel palier
CN112135982B (zh) 滚动轴承
CA2689967C (fr) Roulement de roue incorporant des dispositifs de detection
JP2000304757A (ja) 回転速度検出機能付き軸受装置
WO2011121383A1 (fr) Ensemble roulement, outil et procédé de montage d'un tel ensemble roulement
JP2006300704A (ja) 回転角度検出センサ
JP2005337751A (ja) 回転角度検出装置付回転支持装置
JP2025150655A (ja) 軸受装置
WO2024176941A1 (fr) Palier équipé d'un capteur de rotation
JP2016019447A (ja) 中空アクチュエータ

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: 11822826

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: 11822826

Country of ref document: EP

Kind code of ref document: A1