JP2006194641A - 磁気エンコーダおよびそれを備えた車輪用軸受 - Google Patents
磁気エンコーダおよびそれを備えた車輪用軸受 Download PDFInfo
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- JP2006194641A JP2006194641A JP2005004467A JP2005004467A JP2006194641A JP 2006194641 A JP2006194641 A JP 2006194641A JP 2005004467 A JP2005004467 A JP 2005004467A JP 2005004467 A JP2005004467 A JP 2005004467A JP 2006194641 A JP2006194641 A JP 2006194641A
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- Prior art keywords
- powder
- magnetic
- magnetic encoder
- metal powder
- nonmagnetic metal
- 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.)
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- 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
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- 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
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- 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
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- 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
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
-
- 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
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/02—Wheel hubs or castors
-
- 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
- F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
- F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
- G01D2205/80—Manufacturing details of magnetic targets for magnetic encoders
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
【解決手段】 磁性粉末としてサマリウム鉄(SmFeN)系磁性粉を、非磁性金属粉末としてスズ粉末をそれぞれ使用し、サマリウム鉄(SmFeN)系磁性粉を20〜90wt%、スズ粉末を10〜80wt%含む混合粉末を圧縮成形して圧縮成形体14’を得る。この圧縮成形体14’を、非磁性金属粉末であるスズ粉末の融点未満の温度で焼結して、磁気エンコーダ10の多極磁石となる焼結体を成形する。
【選択図】図1
Description
磁性粉末 ;サマリウム鉄(SmFeN)系磁性粉
非磁性金属粉末;スズ粉末(最大粒径63μm、見かけ密度;2.27g/cm3、ガスアトマイズ法で成形)
混合比率 ;(磁性粉末:非磁性金属粉末=55wt%:45wt%
成形密度 ;6.4g/cm3
焼結温度 ;220℃、1hr保持
磁性粉末 ;サマリウム鉄(SmFeN)系磁性粉
非磁性金属粉末;スズ粉末(350メッシュアンダー、見かけ密度;2.14g/cm3、水アトマイズ法で成形)
混合比率 ;サマリウム鉄(SmFeN)系磁性粉:スズ粉末=70wt%:30
wt%
成形密度 ;6.6g/cm3
焼結温度 ;220℃、1hr保持
磁性粉末 ;サマリウム鉄(SmFeN)系磁性粉
非磁性金属粉末;スズ−亜鉛合金粉末(スズ75wt%:亜鉛25wt%、最大粒径45μm、見かけ密度:1.76g/cm3、水アトマイズ法で成形)
混合比率 ;サマリウム鉄(SmFeN)系磁性粉:スズ−亜鉛合金粉末=60wt%:40wt%
成形密度 ;6.4g/cm3
焼結温度 ;180℃、1hr保持
なお、比較例、実施例(1、2)ともに、潤滑剤としてステアリン酸亜鉛が0.8wt%添加される。
2 外方部材
3 転動体
5 シール装置
7 等速自在継手
10 磁気エンコーダ
11 芯金
12a 取付け部
12b 当接部
13 固定部
13a 挟持面
14 多極磁石
14a 外周部
14’ 圧縮成形体
17 弾性部材
17a、17b、17c シールリップ
18 ラビリンスシール
21 磁気センサ
22 回転検出装置
p ピッチ
Claims (7)
- 磁性粉末と非磁性金属粉末との混合粉末を圧縮成形した後に焼結してなる多極磁石を備えた磁気エンコーダにおいて、
前記多極磁石は、20〜90wt%の前記磁性粉末と、10〜80wt%の前記非磁性金属粉末とからなり、前記非磁性金属粉末の融点未満の温度で焼結されたものであることを特徴とする磁気エンコーダ。 - 前記非磁性金属粉末は、最大粒径が63μm以下のサイズであることを特徴とする請求項1記載の磁気エンコーダ。
- 前記非磁性金属粉末は、海綿状、針状、角状、樹枝状、繊維状、片状、不規則形状、涙滴状のうちから選択される一の形状をなすものであることを特徴とする請求項1記載の磁気エンコーダ。
- 前記非磁性金属粉末は、水アトマイズ法あるいは油アトマイズ法で成形されたものであることを特徴とする請求項3記載の磁気エンコーダ。
- 前記磁性粉末は、サマリウム鉄系磁性粉であることを特徴とする請求項1記載の磁気エンコーダ。
- 前記非磁性金属粉末は、スズ又はスズ−亜鉛合金であることを特徴とする請求項1記載の磁気エンコーダ。
- 請求項1〜6の何れかに記載の磁気エンコーダを備えた車輪用軸受。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005004467A JP4633480B2 (ja) | 2005-01-11 | 2005-01-11 | 磁気エンコーダおよびそれを備えた車輪用軸受 |
US11/793,012 US20080297143A1 (en) | 2005-01-11 | 2006-01-10 | Magnetic Encoder and Wheel Bearing Provided with the Same |
DE112006000184T DE112006000184T5 (de) | 2005-01-11 | 2006-01-10 | Magnetische Codiereinrichtung und mit dieser versehenes Radlager |
CNB2006800020390A CN100504308C (zh) | 2005-01-11 | 2006-01-10 | 磁性编码器和设置有此磁性编码器的轮轴承 |
PCT/JP2006/300134 WO2006075572A1 (ja) | 2005-01-11 | 2006-01-10 | 磁気エンコーダおよびそれを備えた車輪用軸受 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005004467A JP4633480B2 (ja) | 2005-01-11 | 2005-01-11 | 磁気エンコーダおよびそれを備えた車輪用軸受 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006194641A true JP2006194641A (ja) | 2006-07-27 |
JP4633480B2 JP4633480B2 (ja) | 2011-02-16 |
Family
ID=36677597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005004467A Expired - Fee Related JP4633480B2 (ja) | 2005-01-11 | 2005-01-11 | 磁気エンコーダおよびそれを備えた車輪用軸受 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP4633480B2 (ja) |
CN (1) | CN100504308C (ja) |
DE (1) | DE112006000184T5 (ja) |
WO (1) | WO2006075572A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011139977A1 (en) | 2010-05-02 | 2011-11-10 | Mbs Engineering Llc | Magnet and holder assembly having improved rotational and axial stability |
CN105122011A (zh) * | 2013-04-09 | 2015-12-02 | Ntn株式会社 | 磁性编码器及其制造方法 |
DE102014217458A1 (de) * | 2014-09-02 | 2016-03-03 | Schaeffler Technologies AG & Co. KG | Encoder und Sensorvorrichtung für ein drehbares Maschinenteil |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05166615A (ja) * | 1991-12-19 | 1993-07-02 | Tdk Corp | 磁石の製造方法および磁石製造用母合金 |
JP2004037441A (ja) * | 2003-01-08 | 2004-02-05 | Ntn Corp | 磁気エンコーダおよびそれを備えた車輪用軸受 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0612264B2 (ja) * | 1988-08-26 | 1994-02-16 | ヤマハ株式会社 | 磁気式エンコーダ用磁気記録媒体 |
JP2000040611A (ja) * | 1998-07-23 | 2000-02-08 | Hitachi Maxell Ltd | 樹脂結合型永久磁石材料、これを利用したエンコーダ、および樹脂結合型永久磁石材料の着磁方法 |
JP2001272250A (ja) * | 2000-03-24 | 2001-10-05 | Seiko Precision Inc | 磁化パターンを有する被検出体および磁気エンコーダ |
JP2004279102A (ja) * | 2003-03-13 | 2004-10-07 | Daido Electronics Co Ltd | 回転センサの回転子 |
-
2005
- 2005-01-11 JP JP2005004467A patent/JP4633480B2/ja not_active Expired - Fee Related
-
2006
- 2006-01-10 CN CNB2006800020390A patent/CN100504308C/zh not_active Expired - Fee Related
- 2006-01-10 WO PCT/JP2006/300134 patent/WO2006075572A1/ja active Application Filing
- 2006-01-10 DE DE112006000184T patent/DE112006000184T5/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05166615A (ja) * | 1991-12-19 | 1993-07-02 | Tdk Corp | 磁石の製造方法および磁石製造用母合金 |
JP2004037441A (ja) * | 2003-01-08 | 2004-02-05 | Ntn Corp | 磁気エンコーダおよびそれを備えた車輪用軸受 |
Also Published As
Publication number | Publication date |
---|---|
CN101103252A (zh) | 2008-01-09 |
DE112006000184T5 (de) | 2007-11-29 |
WO2006075572A1 (ja) | 2006-07-20 |
CN100504308C (zh) | 2009-06-24 |
JP4633480B2 (ja) | 2011-02-16 |
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