EP2266165A1 - Palier, notamment palier de roulement ou de glissement ou guidage linéaire, muni d un transpondeur - Google Patents

Palier, notamment palier de roulement ou de glissement ou guidage linéaire, muni d un transpondeur

Info

Publication number
EP2266165A1
EP2266165A1 EP09733504A EP09733504A EP2266165A1 EP 2266165 A1 EP2266165 A1 EP 2266165A1 EP 09733504 A EP09733504 A EP 09733504A EP 09733504 A EP09733504 A EP 09733504A EP 2266165 A1 EP2266165 A1 EP 2266165A1
Authority
EP
European Patent Office
Prior art keywords
slot
bearing
transponder
antenna
dielectric
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.)
Withdrawn
Application number
EP09733504A
Other languages
German (de)
English (en)
Inventor
Thomas Rink
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2266165A1 publication Critical patent/EP2266165A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • 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
    • F16C41/008—Identification means, e.g. markings, RFID-tags; Data transfer means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas

Definitions

  • Bearings in particular rolling or plain bearings or linear guide, with a
  • the invention relates to a bearing according to the preamble of claim 1, in particular a rolling or sliding bearing or a linear guide, with a transponder.
  • the transponders comprise an antenna which is addressed by means of electromagnetic radiation and is arranged on or in the bearing. This results in difficulties due to the shielding of the electromagnetic radiation by the generally metallic components of the bearing, especially the bearing rings of a rolling bearing.
  • US 6,501,382 B1 describes a roller bearing with an outer ring as a bearing component, in whose body a bore is mounted on the end face of the outer ring, within which the RFID element is arranged.
  • the antenna is structurally integrated into the RFID element.
  • the antenna is shielded by the metallic environment of the inner surface of the bore and difficult to address or emitted by the RFID element signals can be received outside the bearing ring poorly.
  • DE 10 2004 005 234 T5 describes an arrangement of an RFID element on a roller bearing, which has as a bearing component a sealing element with a metallic insert.
  • the generally annular metallic insert has a bore, wherein the remaining between the bore portions of the metallic body of the insert are connected as an antenna of the RFID element.
  • a dipole antenna is formed, which is bounded on both sides by the bore. Since the ends of the dipole antenna are very close together, the antenna is only weak. Also, such an arrangement for bearings that have no sealing element, or in which the sealing element has no metallic insert, not to use.
  • the RFID element is arranged in a sealing element with a metallic insert, but the metallic insert is not connected as an antenna of the RFID element (DE 10 2004 235 T5), the metallic insert interferes with the function of the antenna integrated in the RFID element.
  • the formation of the antenna as a slot antenna requires only the formation of a slot in the usually already metallic body of the bearing component.
  • a slot is easy to manufacture; If required, notches, grooves, bores or recesses, such as blind bores, which are frequently applied during the manufacture of the bearing component, can be designed as a slot antenna, in particular by a circuit as a slot antenna for the transponder.
  • the slit may also be formed by caulking a portion of the body of the bearing component to approach the surface of the same or another bearing component so as to form a gap that can be switched as a slot of a slot antenna without that there is a material removal of the body of the bearing component in the formation of the slot.
  • any slot on a body of a bearing component of a bearing may be used as a slot antenna of a transponder associated with the bearing.
  • the slot may be formed, for example, as the body of the bearing component piercing hole or mounted in the body blind hole or blind hole. Furthermore, essentially any geometric shape can be assumed, provided that it remains fundamentally suitable as a slot antenna. It can also be provided that the slot is arranged spatially separated from the transponder, if one appropriate circuit between the slot and the rest of the transponder is provided.
  • the slot can not be attached to the bearing itself, but attached to the bearing receptacle and the rest of the transponder can be arranged on a bearing ring, so that in this sense, the Lagerauf- amount applies as a bearing component.
  • the slot may be provided on a bearing ring as a bearing component and the transponder outside of the bearing, for example on the bearing receptacle, provided that the slot is connected with respect to the rest of the transponder as a slot antenna.
  • the slot may be formed by the gap formed in the inner ring and the outer ring, provided that the gap is designed to be electrically insulating, for example, if non-conductive, in particular ceramic rolling elements are provided.
  • the circuit of the slot as a slot antenna of the transponder can be formed by a conductive connection, especially by a galvanic connection, between the slot and the rest of the transponder.
  • a conductive connection especially by a galvanic connection
  • connection between the slot and the rest of the transponder without contact especially by a capacitive or inductive coupling of the slot to the other transponder form.
  • the slot is formed as a substantially cuboidal recess.
  • the slot is given a simple, easily reproducible shape, which is favorable in terms of mass production.
  • the parallel side surfaces of the cuboid recess further allow the other transponder to respond in particular to polarized radiation and ensure that the signals emitted by the transponder have a polarization, so that these signals can be easily recognized in a noise background.
  • the slot is formed as a substantially cuboid recess, it is preferably provided that the cuboid recess has a long side surface with a length which corresponds to approximately half the wavelength of the transponder and a depth of approximately one quarter of the wavelength of the transponder ,
  • the sizing of the slot with respect to the wavelength to which the transponder responds ensures that the slot is tuned to the wavelength of the transponder as a slot antenna. Other wavelengths are poorly received by the slot antenna so that the slot antenna can act as a filter.
  • the remainder of the transponder can be spatially spaced from the slot antenna.
  • the transponder is arranged in the slot.
  • the slot is an opening or a receptacle for the rest of the transponder, which is at least partially filled by the transponder.
  • the transponder can be accommodated in the slot in particular so that the transponder does not protrude beyond the slot.
  • the slot may be configured to receive the remaining transponder, however, the surfaces or edges of the slot that make up its effect as a slot antenna are optimized so that the slot is switchable as a good slot antenna of the transponder.
  • the transponder is arranged eccentrically in the slot, in particular near a surface of the slot.
  • the remainder of the transponder can be located at a location where the input impedance of the slot antenna, which is substantially determined by the slot's geometric shape, the location of the remainder of the transponder in the slot and the dielectric properties of the slot, is the remainder Transponder is adjusted.
  • the slot is formed by a substantially cuboidal recess in the body of the bearing component, wherein a long side surface of the cuboid corresponds to approximately half and a depth of the cuboid, measured from the surface of the environment of the recess, approximately one quarter of the wavelength of the transponder, may preferably be provided that the transponder is disposed in the slot near the short side surface of the cuboid. It can further be provided that the long or short side surface of the cuboid or the bottom surface in turn has an opening, the surface is small in relation to the surface of the side or bottom surface, wherein the transponder is at least partially accommodated in this opening.
  • the slot is filled with a dielectric.
  • the dielectric increases the energy density in the slot and further provides the ability to adjust the wavelength in the slot, such that the input impedance of the remainder of the transponder is matched to the impedance of the slot antenna.
  • the antenna is constructed as a structural unit comprising a connection for the transponder, a dielectric surrounding the connection of the transponder, and an electrically conductive outer coating of the dielectric.
  • This structural unit can be fitted as a manufactured separately from the bearing module in a provided in the bearing component receptacle.
  • Such a structural unit can also be provided as a slot antenna in cases where the body of the bearing component is not formed metallically conductive.
  • the electrically conductive coating of the dielectric thereby forms the inner surfaces of a slot and thus the effective surfaces or edges of the slot antenna.
  • the dielectric itself mechanically stabilizes the surfaces of the slot and establishes defined electrical relationships between the surfaces of the outer coating.
  • the structural unit as a slot antenna for a transponder, which can be arranged outside the structural unit, but preferably part of the structural unit and is incorporated within the dielectric or on the dielectric.
  • the electrically conductive outer coating of the dielectric is surrounded by a non-conductive coating, in particular a ceramic coating.
  • the ceramic coating shields the structural unit from an electronic point of view with respect to the body of the bearing component, in particular mechanical, thermal or magnetic influences of the body of the bearing component on the structural unit can be controlled.
  • the ceramic coating may have the electrically conductive outer coating as an inner coating, which then in turn surrounds the dielectric. In this case, the ceramic coating is part of the structural unit.
  • a prefabricated structural unit as a slot antenna may be provided to provide a slot in the body of the bearing component, the inner surface of the slot with a dielectric
  • coating for example by attaching a ceramic film, on the dielectric coating to apply an electrically conductive surface, for example by attaching a metallic foil on the dielectric coating, especially the ceramic foil, and in the thus-lined inner surface of the
  • the Slot antenna preferably the entire remaining transponder including the connection to the slot antenna to position. If necessary, the area enclosed by the inner surface of the slot can be filled with a dielectric whose surface is filled with the Boundary of the slot flush in the plane of the body of the bearing component.
  • Fig. 2 shows the detail of Fig. 1 in a plan view
  • FIG. 3 schematically shows a perspective view of a slot antenna which deviates from the slot antenna shown in FIGS. 1 and 2.
  • Fig. 1 shows a bearing which is designed as a rolling or sliding bearing, with a bearing component 1, especially a bearing ring of a roller bearing, in the body 2, a transponder 3 is arranged.
  • the bearing can also be designed as a liner guide, and the bearing component 1 is then part of the linear guide.
  • the transponder 3 comprises an antenna designed as a slot antenna 4 as well as the remaining transponder 5, which accommodates in particular electronic memory components.
  • the Slot antenna 4 is formed as an antenna of the transponder 3 and coupled to the rest of the transponder 5, in particular contactlessly coupled, especially by an inductive or capacitive coupling.
  • the slot antenna 4 is formed as a slot 6 in the body 2 of the bearing component 1; this slot 6 has with respect to the surface 7 of the slot 6 adjacent portion of the body 2 of the bearing component 1 has a depth of one quarter of the wavelength to which the transponder is tuned 3 and with which the transponder 3 transmits or by an operator of can be addressed outside.
  • the slot 6 is narrow in the sense that its extension in the plane of the surface 7 of the body 2 is significantly less than its depth. Within the slot 6, the remainder of the transponder 5 is arranged close to the surface of the slot 6, that is to say off-center.
  • the slot 6 is filled with a dielectric which extends to the surface of the slot 6, within which the remaining transponder 5 is arranged and which terminates substantially flush with the surface 7 of the body 2. From the surface 7 side walls B, C go substantially vertically; the slot further comprises a bottom surface E.
  • the body 2 of the bearing component 1 is electrically conductive, in particular metallic, so that the side walls B, C of the slot 6 form conductive interfaces to the dielectric between the side walls B, C.
  • the side walls B, C can be formed as conductive surfaces or edges of the slot antenna 4 by a suitable wiring.
  • Fig. 2 shows the slot 6 and the surface 7 of the body 2 in plan view.
  • the slot 6 is formed overall as a substantially parallelepiped-shaped recess in the body 2.
  • the long side surfaces B, C of the cuboid have an extent which corresponds essentially to half the wavelength of the transponder 3. It can be further seen that the rest of the transponder 5 in the slot. 6 off-center, in particular shifted to one of the short side surfaces A, D, is received in the dielectric.
  • the slot antenna 4 is formed by the long side surfaces C, B, the exact configuration of the short side surfaces A, D and the bottom surface B is not critical to the function of the slot antenna 4.
  • the side surfaces A, D can also be designed rounded or completely omitted, so that in the latter case, the long side surfaces C, B converge towards the respective ends and the slot 6 provides a substantially almond-shaped plan view.
  • the bottom surface B may be rounded or tapered in a V-shape.
  • the slot can also widen, so that the remaining transponder 5 can be accommodated in this widening of the slot.
  • the bottom surface B or one of the two side surfaces C, B or A, D may have a depression, in which the rest of the transponder 5 is received, so that it is no longer located directly between the long side surfaces C, B.
  • the slot antenna 4 shown in FIG. 3 deviates from the slot antenna shown in FIG. 1 or FIG. 2 in that the remaining transponder 5 is arranged centrally in the slot 6 designed as a cuboid-shaped recess. From the rest of the transponder 5 have galvanic
  • the side surfaces A, B, C, D, E of the slot antenna 4 are externally non-conductive, in particular provided with a ceramic coating, and on the inside, on the other transponder 5 facing surface, electrically conductive.
  • the ceramic coating insulates the
  • Slot antenna 4 is further filled with a dielectric (eg PA66-GF25 or a ceramic, from which rolling elements are formed), within which the rest of the transponder 5 is connected to the side surfaces B, C of the slot antenna, especially with the contact 8 to the side surfaces B, C, is arranged.
  • a dielectric eg PA66-GF25 or a ceramic, from which rolling elements are formed
  • the slot antenna 4 shown in FIG. 3 can be designed as a structural unit comprising as components at least the electrically conductive partial surfaces of the side surfaces B, C, the dielectric and the terminals of the remaining transponder 5 to the electrically conductive partial surfaces of the side surfaces B, C.
  • a structural unit can be inserted into a recess of cuboidal shape. If the structural unit additionally has an external ceramic or non-conductive coating, this structural unit can be used largely as a slot antenna 4, regardless of the electrical conductivity of the body 2 of the bearing component 1.
  • the slot antenna 4 was formed in particular by the long side surfaces C, B of the slot 6. It is understood that alternatively or additionally, the short side surfaces A, D can be switched as a slot antenna, which is tuned to a different wavelength of the transponder 3. It is further understood that the surfaces of the slot antenna need not necessarily face each other; These surfaces may also include an angle with each other. For example, it may be provided, the slot antenna between a short side surface, z. B. A, and a long side surface, z. B. B, if an electrical insulation is provided between the side surfaces A and B.
  • the geometric shape of the slot antenna 4 was determined substantially by the shape of the slot 6. If a slot has a different shape from the desired slot antenna 4, it is understood that the slot can be adapted in shape to the desired shape of the slot antenna 4, in particular, the slot as far as For example, electrically conductive paste are filled until the remaining gap has the desired geometric shape of the slot antenna. If the slot antenna 4 is formed by a structural unit, this structural unit can be inserted into the filling of the slot, especially in the electrically conductive paste.
  • the slot was formed as a recess in the body 2 of the bearing component 1. It is understood that the slot need not be provided as a recess in the body; it can also be provided to form the slot between the surface 7 of the body 2 and a portion caulked with respect to the surface 7. Further, the slot between the surface of a first bearing component and the surface of a second bearing component may be formed, in particular between the inner ring and the outer ring of a rolling bearing or between a bearing ring and an electrically conductive sealing element of the bearing.
  • the slot 6 was formed by a blind hole in the body 2 of the bearing component 1. It is understood that the slot 6 may also be formed by an opening passing through the body 2, in which there is no bottom surface E.
  • the side surfaces A, B, C, D, E of the slot antenna 4 of the embodiment of FIG. 3 were outside non-conductive, in particular provided with a ceramic coating. It is understood that the side surfaces may be formed externally conductive.
  • the invention has been described above with reference to a bearing designed as a roller bearing.
  • the bearing part 1 was the case
  • bearing also as a linear guide may be formed, the bearing component 1 of the two embodiments described above corresponds in this case, the rail, the circulation unit or the carriage or another part of the linear guide as a bearing component.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Near-Field Transmission Systems (AREA)
  • Sliding-Contact Bearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

L'invention concerne un palier, notamment un palier de roulement ou de glissement ou un guidage linéaire, comprenant au moins un composant de palier (1), notamment une bague de roulement du palier de roulement, et un transpondeur (3) muni d'une antenne (4). Conformément à l'invention, l'objet consistant à indiquer un palier, notamment un palier de roulement ou de glissement ou un guidage linéaire, muni d'un transpondeur RFID comportant une antenne, pour lequel l'antenne du transpondeur RFID est de configuration simple et pour l'essentiel indépendante de la configuration du palier est réalisé en ce que l'antenne (4) est réalisée sous la forme d'une antenne fendue et comprend une fente (6), et en ce que la fente (6) est formée dans ou sur le composant de palier (1).
EP09733504A 2008-04-15 2009-04-04 Palier, notamment palier de roulement ou de glissement ou guidage linéaire, muni d un transpondeur Withdrawn EP2266165A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008018776A DE102008018776A1 (de) 2008-04-15 2008-04-15 Lager, insbesondere Wälz- oder Gleitlager oder Linearführung, mit einem Transponder
PCT/DE2009/000455 WO2009127190A1 (fr) 2008-04-15 2009-04-04 Palier, notamment palier de roulement ou de glissement ou guidage linéaire, muni d’un transpondeur

Publications (1)

Publication Number Publication Date
EP2266165A1 true EP2266165A1 (fr) 2010-12-29

Family

ID=40874781

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09733504A Withdrawn EP2266165A1 (fr) 2008-04-15 2009-04-04 Palier, notamment palier de roulement ou de glissement ou guidage linéaire, muni d un transpondeur

Country Status (7)

Country Link
US (1) US20110032160A1 (fr)
EP (1) EP2266165A1 (fr)
JP (1) JP2011517913A (fr)
CN (1) CN102084545A (fr)
BR (1) BRPI0910479A2 (fr)
DE (1) DE102008018776A1 (fr)
WO (1) WO2009127190A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130091259A (ko) * 2010-07-02 2013-08-16 아크티에볼라게트 에스케이에프 추가부품을 가진 베어링 링 및 베어링 링을 생산하기 위한 방법
JP5502822B2 (ja) * 2011-04-27 2014-05-28 パナソニック株式会社 電動機およびそれを備えた電気機器
CN103016551B (zh) * 2011-09-27 2015-04-01 北京首科凯奇电气技术有限公司 多接口轴承及其旋转装置
DE102014210547B4 (de) 2014-06-04 2021-01-07 Schaeffler Technologies AG & Co. KG Verfahren und Anordnung zur Ermittlung einer Drehzahl und/oder einer Winkelposition eines Lagers
DE102016106112A1 (de) * 2016-04-04 2017-10-05 Federal-Mogul Deva Gmbh Gleitlager mit Verschleissüberwachung und zugehöriges Verfahren
DE202016102133U1 (de) 2016-04-21 2017-05-23 Igus Gmbh Gleitlager, Kunststoffgleitelement, System und Verwendung zur Verschleißerkennung
DE102021119115A1 (de) * 2021-07-23 2023-01-26 Schaeffler Technologies AG & Co. KG Elektrische Koppelanordnung zur kabellosen Signalübertragung im Bereich eines hohlen Maschinenelements

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JPS63181505A (ja) * 1987-01-23 1988-07-26 Nippon Telegr & Teleph Corp <Ntt> 小形スロツトアンテナ
KR920002439B1 (ko) * 1988-08-31 1992-03-24 삼성전자 주식회사 휴대용 무선전화기의 슬로트 안테나 장치
JP2001156533A (ja) * 1999-11-29 2001-06-08 Aisin Seiki Co Ltd 車両用アンテナ装置
US6483473B1 (en) * 2000-07-18 2002-11-19 Marconi Communications Inc. Wireless communication device and method
US6501382B1 (en) 2001-06-11 2002-12-31 Timken Company Bearing with data storage device
JP2005084962A (ja) * 2003-09-09 2005-03-31 Ntn Corp Ｉｃタグ付き機械要素部品
US7534045B2 (en) * 2003-11-25 2009-05-19 Ntn Corporation Bearing with IC tag and seal for the same
US20050146475A1 (en) * 2003-12-31 2005-07-07 Bettner Allen W. Slot antenna configuration
US7411507B2 (en) * 2004-08-20 2008-08-12 Soundcraft, Inc. Metal housing with integral antenna for RFID reader/writer
WO2006128448A1 (fr) * 2005-06-01 2006-12-07 Hardy Zissel Systeme comportant un transpondeur et un element metallique
US7619531B2 (en) * 2005-07-19 2009-11-17 Alien Technology Corporation Radio frequency identification with a slot antenna
DE102006029248A1 (de) * 2005-10-26 2007-05-16 Giesecke & Devrient Gmbh Transponder
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DE102006029249A1 (de) * 2006-06-26 2007-12-27 Giesecke & Devrient Gmbh Verfahren zur Montage eines Transponders an einem Gegenstand
NZ549173A (en) * 2006-08-15 2007-06-29 Times 7 Holdings Ltd Licence plate with integrated antenna
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See references of WO2009127190A1 *

Also Published As

Publication number Publication date
DE102008018776A1 (de) 2009-10-22
JP2011517913A (ja) 2011-06-16
CN102084545A (zh) 2011-06-01
WO2009127190A1 (fr) 2009-10-22
US20110032160A1 (en) 2011-02-10
BRPI0910479A2 (pt) 2015-10-20

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