US20080265522A1 - Sealing Device with an Integrated Encoder for Bearings - Google Patents

Sealing Device with an Integrated Encoder for Bearings Download PDF

Info

Publication number
US20080265522A1
US20080265522A1 US11/883,586 US88358606A US2008265522A1 US 20080265522 A1 US20080265522 A1 US 20080265522A1 US 88358606 A US88358606 A US 88358606A US 2008265522 A1 US2008265522 A1 US 2008265522A1
Authority
US
United States
Prior art keywords
sealing device
race
sealing
peripheral portion
insert
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.)
Abandoned
Application number
US11/883,586
Other languages
English (en)
Inventor
Stellario Barbera
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
Assigned to AKTIEBOLAGET SKF reassignment AKTIEBOLAGET SKF ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BARBERA, STELLARIO
Publication of US20080265522A1 publication Critical patent/US20080265522A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • 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
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
    • 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
    • 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

Definitions

  • the present invention refers to a sealing device for bearings with an integrated encoder for detecting relative rotation between the races of a bearing unit.
  • Sealing devices fitted at the sides of a bearing unit in order to seal the gap between the bearing races are well known.
  • these sealing devices are comprised of a metal reinforcing insert of disc-annular shape onto which there is over-moulded or vulcanized a gasket made of rubber or soft elastomeric material forming two peripheral sealing portions: an outer peripheral portion mounted on the stationary outer race of the bearing in order to perform a static sealing action against this race, and an inner peripheral portion with one or more dynamic sealing lips for sliding against the inner, rotatable bearing race.
  • U.S. Pat. No. 5,383,728 discloses a sealing device of the above-mentioned type wherein the conventional metal insert is replaced by a rigid annular insert of plastic polymeric material.
  • the object of the present invention is to provide a light sealing device, involving low manufacturing and assembling costs, allowing to dispose of the conventional metal reinforcing insert and which integrates an impulse ring or encoder for detecting relative rotation between the races of a bearing unit.
  • FIG. 1 is an axial cross-sectional view of a bearing unit fitted with a pair of sealing devices
  • FIGS. 2-5 are enlarged views of four different embodiments of a sealing device according to the invention.
  • a ball bearing unit of conventional design includes a rotatable race 10 , a stationary race 11 and a plurality of balls 12 interposed between the races 10 and 11 .
  • a sealing device 13 , 14 of disc-annular shape is fitted at either opposite side of the bearing in order to seal the gap 15 between the bearing races.
  • each sealing device comprises a relatively rigid disc-annular insert 16 onto which there is over-moulded or vulcanized a gasket 17 of rubber or soft elastomeric material.
  • the gasket 17 forms—in per se known manner—two opposite peripheral sealing portions 18 , 19 intended to perform a static sealing action against the rotatable race 10 and a dynamic sealing action against the stationary race 11 , respectively.
  • the peripheral portion 18 is forcefully inserted in a circumferential groove 20 of the rotatable race 10 so as to fix the sealing device to this race.
  • the peripheral portion 19 forms at least one lip 19 a performing a sliding or labyrinth sealing action against the stationary race 11 .
  • the insert 16 is made of a matrix of thermoplastic material loaded with a powder of magnetized or magnetizable material, preferably ferrite.
  • the thermoplastic matrix has a softening temperature exceeding 180° C. It may for example consist of polyamide (Nylon 66), or polyimide, or polyethylene-ether-sulphonate, or polyetheretherketone (PEEK).
  • the insert 16 besides reinforcing mechanically the sealing device, performs the functions of an impulse ring or encoder for a rotation detecting device associated with the bearing and capable of detecting relative rotation between the races 10 and 11 .
  • the one according to the present invention is fixable to the rotatable bearing race, in order to be driven for rotation therewith and work as an annular encoder.
  • the insert 16 Prior to or after over-moulding or vulcanization of the gasket 17 , the insert 16 is polarized magnetically so as to form, in predetermined angular zones or fields, a sequence of suitably alternate and/or spaced north/south poles.
  • the magnetic properties are given to the insert 16 by an apparatus that permanently magnetizes the ferrite in predetermined zones with the desired polar orientation.
  • the impulse ring is operatively facing an associated sensor or magnetoelectric transducer (not shown) mounted on a fixed part.
  • an associated sensor or magnetoelectric transducer (not shown) mounted on a fixed part.
  • the magnetic flux linked by the transducer varies as the magnetized zones of the insert 16 pass in front of the transducer, which provides electric pulses indicative of rotation data (angular position, speed, acceleration, etc.) of the rotatable race.
  • the electric signals provided by the transducer are transmitted to an electronic processing unit and processed by this in order to obtain information concerning the motion of the rotatable race.
  • FIGS. 2-5 show axial cross-sections of four forms that the insert 16 and the elastic gasket 17 may take, in accordance with the geometric features of the bearing onto which the sealing device is to be mounted and the working conditions of the bearing.
  • the insert 16 may be bent and shaped at different points in order to increase its flexural strength and improve the anchoring of the rubber gasket 17 .
  • peripheral sealing portions 18 , 19 may indifferently be formed on the outer or inner peripheral edges of the sealing device, depending on whether this is intended to be applied to a bearing unit with a stationary outer race and a rotatable inner race, or vice versa.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
US11/883,586 2005-02-15 2006-02-15 Sealing Device with an Integrated Encoder for Bearings Abandoned US20080265522A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITT02005A000088 2005-02-15
IT000088A ITTO20050088A1 (it) 2005-02-15 2005-02-15 Dispositivo di tenuta per cuscinetti con encoder integrato.
PCT/EP2006/050957 WO2006087339A1 (fr) 2005-02-15 2006-02-15 Dispositif de scellement dote d'un codeur integre pour roulements

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/050957 A-371-Of-International WO2006087339A1 (fr) 2005-02-15 2006-02-15 Dispositif de scellement dote d'un codeur integre pour roulements

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/330,493 Division US8371757B2 (en) 2005-02-15 2011-12-19 Sealing device with an integrated encoder for bearings

Publications (1)

Publication Number Publication Date
US20080265522A1 true US20080265522A1 (en) 2008-10-30

Family

ID=36579136

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/883,586 Abandoned US20080265522A1 (en) 2005-02-15 2006-02-15 Sealing Device with an Integrated Encoder for Bearings
US13/330,493 Active US8371757B2 (en) 2005-02-15 2011-12-19 Sealing device with an integrated encoder for bearings

Family Applications After (1)

Application Number Title Priority Date Filing Date
US13/330,493 Active US8371757B2 (en) 2005-02-15 2011-12-19 Sealing device with an integrated encoder for bearings

Country Status (6)

Country Link
US (2) US20080265522A1 (fr)
EP (1) EP1851457B1 (fr)
JP (1) JP5090931B2 (fr)
CN (1) CN100591937C (fr)
IT (1) ITTO20050088A1 (fr)
WO (1) WO2006087339A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090166977A1 (en) * 2006-07-20 2009-07-02 Carl Freudenberg Kg Seal
WO2013001329A1 (fr) * 2011-06-28 2013-01-03 Aktiebolaget Skf Ensemble roulement étanche avec aimant sur le disque d'étanchéité pour attirer les particules métalliques
US9581201B2 (en) 2012-12-20 2017-02-28 Schaeffler Technologies AG & Co. KG Bearing
US20180348016A1 (en) * 2015-11-26 2018-12-06 Schaeffler Technologies AG & Co. KG Encoder and bearing unit comprising an encoder

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010116208A1 (fr) * 2009-04-08 2010-10-14 Aktiebolaget Skf Bague pour système de palier de roulement et système de palier de roulement comprenant cette bague
ITTO20101041A1 (it) * 2010-12-22 2012-06-23 Skf Ab Unità di tenuta per cuscinetti volventi
TWI512217B (zh) * 2013-07-30 2015-12-11 Hiwin Tech Corp Ball screw with magnetic dustproof device
CN109883453A (zh) * 2019-03-11 2019-06-14 安徽库伯密封技术有限公司 一种塑料磁性编码器及其制造工艺
CN117310574B (zh) * 2023-11-28 2024-02-13 华中科技大学 获取磁场转换矩阵的方法、外部磁场测量方法及系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383728A (en) * 1991-11-06 1995-01-24 Skf Industries S.P.A. Sealing shield, particularly for rolling bearings
US5575568A (en) * 1995-02-09 1996-11-19 S.K.F. France Encoder device for a rotational speed sensor and rolling-contact bearing equipped with such a device
US6065879A (en) * 1996-01-19 2000-05-23 Nsk Ltd. Rolling bearing with seal
US20020126926A1 (en) * 2001-03-07 2002-09-12 Ntn Corporation Wheel support bearing assembly
US6776420B2 (en) * 2001-07-19 2004-08-17 Skf Industrie S.P.A. Sealing device for a rolling contact bearing

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574501B1 (fr) * 1984-12-11 1989-11-10 Roulements Soc Nouvelle Roulement a capteur d'informations
JP2652631B2 (ja) * 1986-04-11 1997-09-10 光洋精工 株式会社 パルサー内蔵形シール
DE9003234U1 (de) * 1990-03-20 1991-07-18 Röhm GmbH, 64293 Darmstadt Flammgeschützte Polyethersulfon-Platte
FR2700588B1 (fr) * 1993-01-19 1995-02-17 Roulements Soc Nouvelle Dispositif de montage à joint d'étanchéité à codeur incorporé.
DE19503468C1 (de) * 1995-02-03 1996-05-30 Freudenberg Carl Fa Dichtungsanordnung
DE19503469C1 (de) * 1995-02-03 1996-05-30 Freudenberg Carl Fa Dichtungsanordnung
US5756571A (en) * 1997-02-13 1998-05-26 Agrinutrients Company, Inc. Intumescent thermoplastic polyamide graft polymers
JP2838699B2 (ja) * 1997-02-17 1998-12-16 光洋精工株式会社 パルサー内蔵形シール
US6284360B1 (en) * 1997-09-30 2001-09-04 3M Innovative Properties Company Sealant composition, article including same, and method of using same
US6406763B1 (en) * 1999-12-23 2002-06-18 Cryovac, Inc. Post pasteurization multilayered film
ITTO20010245A1 (it) * 2001-03-16 2002-09-16 S K F Ind S P A Dispositivo di tenuta per cuscinetti.
FR2847018B1 (fr) * 2002-11-07 2005-02-04 Hutchinson Joint dynamique pour arbre rotatif muni d'un dispositif de codage angulaire, dispositif comportant un tel joint et procede de fabrication d'un tel joint
US20040183702A1 (en) * 2003-01-23 2004-09-23 Daniel Nachtigal Magnetizable thermoplastic elastomers
JP2006010477A (ja) * 2004-06-25 2006-01-12 Ntn Corp 荷重センサ内蔵車輪用軸受装置
FR2898188B1 (fr) * 2006-03-06 2008-07-04 Hutchinson Sa Codeur pour arbre, dispositif comprenant un tel codeur et procede de fabrication d'un tel codeur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383728A (en) * 1991-11-06 1995-01-24 Skf Industries S.P.A. Sealing shield, particularly for rolling bearings
US5575568A (en) * 1995-02-09 1996-11-19 S.K.F. France Encoder device for a rotational speed sensor and rolling-contact bearing equipped with such a device
US6065879A (en) * 1996-01-19 2000-05-23 Nsk Ltd. Rolling bearing with seal
US20020126926A1 (en) * 2001-03-07 2002-09-12 Ntn Corporation Wheel support bearing assembly
US6776420B2 (en) * 2001-07-19 2004-08-17 Skf Industrie S.P.A. Sealing device for a rolling contact bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090166977A1 (en) * 2006-07-20 2009-07-02 Carl Freudenberg Kg Seal
WO2013001329A1 (fr) * 2011-06-28 2013-01-03 Aktiebolaget Skf Ensemble roulement étanche avec aimant sur le disque d'étanchéité pour attirer les particules métalliques
US9581201B2 (en) 2012-12-20 2017-02-28 Schaeffler Technologies AG & Co. KG Bearing
US20180348016A1 (en) * 2015-11-26 2018-12-06 Schaeffler Technologies AG & Co. KG Encoder and bearing unit comprising an encoder

Also Published As

Publication number Publication date
JP5090931B2 (ja) 2012-12-05
CN100591937C (zh) 2010-02-24
JP2009526949A (ja) 2009-07-23
EP1851457B1 (fr) 2015-05-06
US8371757B2 (en) 2013-02-12
US20120087610A1 (en) 2012-04-12
WO2006087339A1 (fr) 2006-08-24
WO2006087339A8 (fr) 2007-12-27
ITTO20050088A1 (it) 2006-08-16
CN101142419A (zh) 2008-03-12
EP1851457A1 (fr) 2007-11-07

Similar Documents

Publication Publication Date Title
US8371757B2 (en) Sealing device with an integrated encoder for bearings
KR101364677B1 (ko) 밀봉장치
KR101340279B1 (ko) 로터리 인코더용 펄서 링
US8174257B2 (en) Wheel bearing device with rotation detector
JP2009074687A (ja) センサ付軸受
US20080166079A1 (en) Wheel Bearing Arrangement Comprising an Encoder
JP2009526949A5 (fr)
WO2007086363A1 (fr) Palier a roulement avec capteur de rotation
JP4278324B2 (ja) 車輪用軸受
JP2021036169A (ja) 密封装置
US20090180721A1 (en) Encoding Bearing Device and Rotating Machine
WO2012085617A1 (fr) Ensemble de roulement avec rondelle codeuse et unité de capteur
EP1764534A2 (fr) Joint d'étanchéité à encodeur intégré pour roulement
JP2009229157A (ja) 自動二輪車の車輪用回転速度検出装置
JP2009024767A (ja) 回転速度検出装置付き車輪用軸受装置
JP4742796B2 (ja) 回転検出装置付転がり軸受ユニット
JP2007163397A (ja) 着磁パルサリング
JP2010032303A (ja) 回転検出装置付き車輪用軸受装置
JP2005140334A (ja) 磁気エンコーダ付き軸受
JP5002992B2 (ja) エンコーダ付転がり軸受
WO2010013411A1 (fr) Dispositif de position apte à être utilisé dans une roue et équipé d'un capteur de rotation
JP2007101352A (ja) 回転検出装置付転がり軸受ユニット
JP2005024017A (ja) トーンホイール付軸受装置の構造
JP5327367B2 (ja) 自動二輪車の車輪用回転速度検出装置
EP2156065A1 (fr) Unité de palier avec un codeur

Legal Events

Date Code Title Description
AS Assignment

Owner name: AKTIEBOLAGET SKF, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BARBERA, STELLARIO;REEL/FRAME:020884/0634

Effective date: 20070820

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION