DE9216750U1 - Rotor magnet made of plastic-bonded magnetic material - Google Patents
Rotor magnet made of plastic-bonded magnetic materialInfo
- Publication number
- DE9216750U1 DE9216750U1 DE9216750U DE9216750U DE9216750U1 DE 9216750 U1 DE9216750 U1 DE 9216750U1 DE 9216750 U DE9216750 U DE 9216750U DE 9216750 U DE9216750 U DE 9216750U DE 9216750 U1 DE9216750 U1 DE 9216750U1
- Authority
- DE
- Germany
- Prior art keywords
- rotor magnet
- bushing
- magnetic material
- plastic
- bonded magnetic
- 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.)
- Expired - Lifetime
Links
- 239000000696 magnetic material Substances 0.000 title claims description 12
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims 1
- 244000309464 bull Species 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0231—Magnetic circuits with PM for power or force generation
- H01F7/0252—PM holding devices
- H01F7/0268—Magnetic cylinders
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Description
PATENTANWALT
DIPL-ING. KLAUS-JÜRGEN SCHWARZPATENT ATTORNEY
DIPL-ING. KLAUS-JÜRGEN SCHWARZ
PATENTANWALT SCHWARZ, GLUCKSTRASSE 7, D-5300 BONN 1 EUROPEAN PATENT ATTORNEYPATENT ATTORNEY SCHWARZ, GLUCKSTRASSE 7, D-5300 BONN 1 EUROPEAN PATENT ATTORNEY
Anmelder: 8. Dezember 1992 Applicant: 8 December 1992
Windhorst Beteiligungsgesellschaft mbH
Dorotheenstraße 215Windhorst Holding GmbH
Dorotheenstrasse 215
5300 Bonn 15300 Bonn 1
VNR: 108 545 VNR: 108 545
ANWALTSAKTE
2 583/92ATTORNEY FILE
2 583/92
Die Erfindung betrifft einen Rotormagneten aus kunststoffgebundenem Magnetmaterial nach dem Oberbegriff des Anspruches 1.The invention relates to a rotor magnet made of plastic-bonded magnetic material according to the preamble of claim 1.
Üblich sind eingespritzte Buchsen mit zylindrischer Form mit und ohne Rändel. Auch ein buchsenloses Aufpressen von kunststof fgebundenen Rotormagneten ist üblich. In diesen Fällen treten beim und nach dem Aufpressen auf eine Welle, besonders bei wechselnden Umgebungsbedingungen, wie Temperatur und Feuchte, Spannungen in dem extrem hochgefüllten kunststoffgebundenen Magnetmaterial auf, die zur Rißbildung und damit zur Zerstörung des Rotormagneten führen können.Injection-molded bushings with a cylindrical shape with and without knurling are common. Pressing plastic-bonded rotor magnets without bushings is also common. In these cases, during and after pressing onto a shaft, particularly under changing ambient conditions such as temperature and humidity, stresses occur in the extremely highly filled plastic-bonded magnet material, which can lead to cracking and thus to the destruction of the rotor magnet.
Außerdem führt die zylindrische Form der Buchse zu einer Reduzierung der Wanddicke des Magneten, die in manchen Anwendungen die magnetische Charakteristik des Rotormagneten ungünstig beeinflußt.In addition, the cylindrical shape of the bushing leads to a reduction in the wall thickness of the magnet, which in some applications has an adverse effect on the magnetic characteristics of the rotor magnet.
Gluckstraße 7 Telefon: (0228) 658091 '«659092 ·· ···· •••Beuteche Bank AG Bonn Postgirokonto KölnGluckstraße 7 Telephone: (0228) 658091 '«659092 ·· ···· •••Beuteche Bank AG Bonn Postgirokonto Köln
D-5300 Bonn 1 Telegramme: Bennpetent feonnfc &iacgr;·. .* &iacgr;..(&Bgr;&Igr;»&Zgr; 3So7OO59) 0503185 (BLZ 37010050) 166927-501D-5300 Bonn 1 Telegram: Bennpetent feonnfc &iacgr;·. .* &iacgr;..(&Bgr;&Igr;»&Zgr; 3So7OO59) 0503185 (bank code 37010050) 166927-501
Telefax: (0228) 65*<&Lgr;&dgr;3 Batvocatt" J &iacgr; ! &iacgr; &Idigr; !Telefax: (0228) 65*<&Lgr;&dgr;3 Batvocatt" J &iacgr; ! &iacgr;&Idigr; !
Der Erfindung liegt die Aufgabe zugrunde, einen Rotormagneten mit eingespritzter Buchse herzustellen, ohne daß die magnetische Charakteristik des Rotormagneten hierdurch ungünstig beeinflußt wird.The invention is based on the object of producing a rotor magnet with an injected bushing without the magnetic characteristics of the rotor magnet being adversely affected thereby.
Die "Einschnürung" der Buchse am Außenumfang ist geeignet, beim Aufpressen auf eine Welle Spannungen im Magneten zu reduzieren. Aufgrund der größeren Magnetwanddicke kann die Beeinflussung der magnetischen Charakteristik des Rotormagneten im allgemeinen vernachlässigt werden.The "constriction" of the bushing on the outer circumference is suitable for reducing tensions in the magnet when it is pressed onto a shaft. Due to the greater magnet wall thickness, the influence on the magnetic characteristics of the rotor magnet can generally be neglected.
Eine sichere Befestigung des Magnetmaterials auf der Buchse kann dabei dadurch erreicht werden, daß die Buchse an den beiden stirnseitigen Enden Bereiche konstanter Wanddicke aufweist, die außen mit einem Rändel versehen sind.A secure fastening of the magnetic material on the bushing can be achieved by having the bushing on both front ends areas of constant wall thickness, which are provided with a knurl on the outside.
Darüber hinaus erlaubt eine metallische Buchse engere Toleranzen für einen stabilen Preßsitz auf einer Welle als ein komplett aus kunststoffgebundenem Magnetmaterial gefertigter Rotormagnet.In addition, a metallic bushing allows tighter tolerances for a stable press fit on a shaft than a rotor magnet made entirely of plastic-bonded magnetic material.
Die Buchse kann aus einem unmagnetischen Material, wie Messing oder Aluminium, oder auch aus Stahl bestehen.The socket can be made of a non-magnetic material, such as brass or aluminum, or even of steel.
Auch eine Herstellung aus einem ausreichend festen und dauerhaft formbeständigen Kunststoff ist in bestimmten Fällen möglich.In certain cases, it is also possible to manufacture the product from a sufficiently strong and permanently dimensionally stable plastic.
Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Es zeigenA preferred embodiment of the invention is shown in the drawing.
Fig. 1 eine Buchse in Seitenansicht,Fig. 1 a socket in side view,
Fig. 2 einen axialen Schnitt durch einen Rotormagneten mit eingespritzter Buchse undFig. 2 an axial section through a rotor magnet with injected bushing and
Fig. 3 eine Draufsicht auf den Rotormagneten mit eingespritzter Buchse.Fig. 3 is a top view of the rotor magnet with injected bushing.
Wie in Fig. 1 und 2 zu erkennen ist, nimmt der Außendurchmesser der Buchse 2 für den Rotormagneten 1 von der Mitte 3 zu beiden Stirnseiten 4, 5 hin stetig zu, wobei die Buchse 2 an den beiden stirnseitigen Enden Bereiche 6, 7 konstanter Wanddicke aufweist, die außen mit einem Rändel 8 versehen sind zur sicheren Befestigung des Magnetmaterials 9 des Rotormagneten 1 auf der Buchse 2.As can be seen in Fig. 1 and 2, the outer diameter of the bushing 2 for the rotor magnet 1 increases steadily from the center 3 to both end faces 4, 5, whereby the bushing 2 has areas 6, 7 of constant wall thickness at the two end faces, which are provided with a knurl 8 on the outside for secure fastening of the magnetic material 9 of the rotor magnet 1 on the bushing 2.
Die Buchse 2 besteht entweder aus einem unmagnetischen Material, wie Messing oder Aluminium, gegebenenfalls auch aus einem geeigneten Kunststoff, oder aus Stahl, wenn dies aufgrund der magnetischen Charakteristik des Rotormagneten erwünscht ist.The bushing 2 is made either of a non-magnetic material, such as brass or aluminum, possibly also of a suitable plastic, or of steel if this is desired due to the magnetic characteristics of the rotor magnet.
ANWALTSAKTE 2 583/92ATTORNEY’S FILE 2 583/92
1 Rotormagnet1 rotor magnet
2 Buchse2 socket
3 Mitte der Buchse3 Center of the socket
4 Stirnseite4 Front side
5 Stirnseite5 Front side
6 Bereich konstanter Wanddicke6 Area of constant wall thickness
7 Bereich konstanter Wanddicke7 Area of constant wall thickness
8 Rändel8 knurls
9 Magnetmaterial9 Magnetic material
Claims (4)
gekennzeichnet , daß die Buchse (2) aus unmagnetischem Material, wie Messing oder Aluminium, besteht.3. Rotor magnet according to claim 1 or 2, characterized
characterized in that the bushing (2) is made of non-magnetic material, such as brass or aluminium.
gekennzeichnet , daß die Buchse (2) aus Stahl besteht.4. Rotor magnet according to claim 1 or 2, characterized
characterized in that the bushing (2) is made of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9216750U DE9216750U1 (en) | 1992-12-09 | 1992-12-09 | Rotor magnet made of plastic-bonded magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9216750U DE9216750U1 (en) | 1992-12-09 | 1992-12-09 | Rotor magnet made of plastic-bonded magnetic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9216750U1 true DE9216750U1 (en) | 1994-04-14 |
Family
ID=6886924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9216750U Expired - Lifetime DE9216750U1 (en) | 1992-12-09 | 1992-12-09 | Rotor magnet made of plastic-bonded magnetic material |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE9216750U1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19601271A1 (en) * | 1996-01-16 | 1997-07-24 | Michael Donner | Magnetic pole rotor for speed measurement |
| DE19836451A1 (en) * | 1998-08-12 | 2000-02-24 | Baermann Max Gmbh | Highly filled plastic part |
| US6198185B1 (en) | 1996-06-05 | 2001-03-06 | Itt Manufacturing Enterprises, Inc. | Magnetic ring |
| DE102008047466A1 (en) * | 2008-09-17 | 2010-04-15 | Valeo Schalter Und Sensoren Gmbh | Magnetic assembly for a torque and / or rotation angle sensor assembly with a magnetic ring and manufacturing method |
-
1992
- 1992-12-09 DE DE9216750U patent/DE9216750U1/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19601271A1 (en) * | 1996-01-16 | 1997-07-24 | Michael Donner | Magnetic pole rotor for speed measurement |
| US6198185B1 (en) | 1996-06-05 | 2001-03-06 | Itt Manufacturing Enterprises, Inc. | Magnetic ring |
| DE19836451A1 (en) * | 1998-08-12 | 2000-02-24 | Baermann Max Gmbh | Highly filled plastic part |
| DE19836451C2 (en) * | 1998-08-12 | 2000-05-31 | Baermann Max Gmbh | Highly filled plastic part |
| US6259343B1 (en) | 1998-08-12 | 2001-07-10 | Max Baermann Gmbh | High-grade plastic component |
| DE102008047466A1 (en) * | 2008-09-17 | 2010-04-15 | Valeo Schalter Und Sensoren Gmbh | Magnetic assembly for a torque and / or rotation angle sensor assembly with a magnetic ring and manufacturing method |
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