DE202013102753U1 - Rotary encoder and drive system - Google Patents
Rotary encoder and drive system Download PDFInfo
- Publication number
- DE202013102753U1 DE202013102753U1 DE201320102753 DE202013102753U DE202013102753U1 DE 202013102753 U1 DE202013102753 U1 DE 202013102753U1 DE 201320102753 DE201320102753 DE 201320102753 DE 202013102753 U DE202013102753 U DE 202013102753U DE 202013102753 U1 DE202013102753 U1 DE 202013102753U1
- Authority
- DE
- Germany
- Prior art keywords
- bearing
- rotary
- housing
- rotary encoder
- drive shaft
- 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
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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
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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
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
-
- 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
- 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
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/02—Bearings or suspensions for moving parts
-
- 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
-
- 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
-
- 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
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
-
- 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
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/24428—Error prevention
- G01D5/24433—Error prevention by mechanical means
Landscapes
- 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
Drehgeber mit einem Rotationslager (24) und einem Messsensor (32) zur Erfassung einer Winkellage des Messsensors (32) gegenüber einer über das Rotationslager (24) drehbar gelagerten Maßverkörperung (33), wobei das Rotationslager (24) in einem Gehäuse (22) elektrisch isolierend gehalten ist, dadurch gekennzeichnet, dass das Gehäuse (22) zumindest im Bereich der Lagerung des Rotationslagers (24) aus Aluminium besteht und ein in dem Gehäuse gebildeter Roationslagersitz (36) für das Rotationslager (24) mit einer Eloxalschicht (40) ausgebildet ist.Rotary encoder with a rotary bearing (24) and a measuring sensor (32) for detecting an angular position of the measuring sensor (32) relative to a material measure (33) rotatably mounted via the rotary bearing (24), the rotary bearing (24) being electrical in a housing (22) is kept insulating, characterized in that the housing (22) consists of aluminum at least in the region of the bearing of the rotary bearing (24) and a rotary bearing seat (36) formed in the housing for the rotary bearing (24) is formed with an anodized layer (40) ,
Description
Die Erfindung betrifft einen Drehgeber nach dem Oberbegriff des Anspruchs 1 und ein Antriebssystem mit einem solchen Drehgeber. The invention relates to a rotary encoder according to the preamble of claim 1 and a drive system with such a rotary encoder.
Ein derartiger Drehgeber ist aus der
Darüber hinaus ist es bekannt, dass Lagerströme einen negativen Einfluss auf derartige Kugellager haben, da die Lagerströme eine Elektroerosion und Schmierstoffzerstörung bewirken und damit einen erhöhten Lagerverschleiß. Neben der oben erwähnten Methode der isolierten Halterung des Kugellagers in einem isolierenden Zwischenring gibt es noch weitere Ansätze, um Lagerschäden durch Potentialaufbau und daraus sich ergebende Lagerströme zu vermeiden. In addition, it is known that bearing currents have a negative impact on such ball bearings, since the bearing currents cause electrical erosion and lubricant destruction and thus increased bearing wear. In addition to the above-mentioned method of isolated mounting of the ball bearing in an insulating intermediate ring, there are other approaches to prevent bearing damage due to potential structure and resulting bearing currents.
Durch den Einsatz leitender Kugellagerfette stellt das Kugellager einen elektrischen Kurzschluss dar, der einen Potentialaufbau vermeidet und somit Stromfluss verhindert. Solche Kugellagerfette werden durch zugesetzte Partikel aus leitfähigem Material leitfähig gemacht. Die zugeführten Partikel führen jedoch zu erhöhtem Lagergeräusch und Reduzierung der Lebensdauer der Kugellager. Through the use of conductive ball bearing grease, the ball bearing represents an electrical short circuit, which avoids a potential build-up and thus prevents current flow. Such ball bearing greases are made conductive by added particles of conductive material. However, the supplied particles lead to increased bearing noise and reduce the life of the ball bearings.
Eine weitere Möglichkeit ist, das Lager selbst elektrisch isolierend auszubilden. Dies erreicht man durch den Einsatz von Keramikkugeln. Diese Maßnahme verteuert jedoch die Kugellager erheblich. Der Verteuerungseffekt verdoppelt sich, da in der Regel zwei Kugellager pro gelagertem Drehgeber eingesetzt werden müssen. Another possibility is to form the bearing itself electrically insulating. This is achieved through the use of ceramic balls. However, this measure increases the ball bearings considerably. The price increase effect is doubled, as usually two ball bearings per mounted rotary encoder must be used.
Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, einen verbesserten Drehgeber und ein Antriebssystem bereitzustellen, bei dem kostengünstig, auf einfache Art und Weise und langlebig Lagerstöme vermieden sind. Based on this prior art, it is an object of the invention to provide an improved rotary encoder and a drive system, are avoided at the cost, in a simple manner and durable Lagerstöme.
Diese Aufgabe wird gelöst durch einen Drehgeber mit den Merkmalen des Anspruchs 1. This object is achieved by a rotary encoder with the features of claim 1.
Ein erfindungsgemäßer Drehgeber weist ein Rotationslager und einen Messsensor zur Erfassung einer Winkellage des Messsensors gegenüber einer über das Rotationslager drehbar gelagerten Maßverkörperung auf. Dabei ist das Rotationslager in einem Gehäuse elektrisch isolierend gehalten. Erfindungsgemäß besteht das Gehäuse zumindest im Bereich der Lagerung des Rotationslagers aus Aluminium, und ein in dem Gehäuse gebildeter Rotationslagersitz ist mit einer Eloxalschicht ausgebildet. A rotary encoder according to the invention has a rotary bearing and a measuring sensor for detecting an angular position of the measuring sensor relative to a measuring graduation rotatably mounted above the rotary bearing. The rotary bearing is held in a housing electrically insulating. According to the invention, the housing is made of aluminum, at least in the area of the bearing of the rotation bearing, and a rotational bearing seat formed in the housing is formed with an anodized layer.
Damit ist im Ergebnis der gleiche Effekt wie bei der bekannten Lagerung mittels eines isolierenden Zwischenrings erzielt und Lagerströme sicher vermieden. Allerdings kann nach der Erfindung auf den Zwischenring vollständig verzichtet werden, was kostengünstig ist und auch für Kugellager mit kleinen Durchmessern vorteilhaft ist, denn für diese gestaltet sich eine separate Halterung in einem Zwischenring als schwierig bis unmöglich. Typischerweise haben Kugellager von Drehgebern einen Durchmesser von kleiner als 20mm. As a result, the same effect as in the known storage by means of an insulating intermediate ring is achieved as a result and bearing currents safely avoided. However, according to the invention can be completely dispensed with the intermediate ring, which is inexpensive and also advantageous for ball bearings with small diameters, because for this, a separate holder in an intermediate ring designed as difficult to impossible. Ball bearings of rotary encoders typically have a diameter of less than 20mm.
Auf besondere elektrische Eigenschaften des Kugellagers selbst muss keine Rücksicht genommen werden. No special consideration has to be given to special electrical properties of the ball bearing itself.
Des Weiteren ermöglicht die Erfindung, dass die Kugellager in einfacher Weise in das Gehäuse, also in den Lagersitz des Gehäuses eingepresst oder eingeklebt werden können. Die Eloxalschicht wird dabei nicht zerstört und die isolierenden Eigenschaften werden erhalten, denn eine solche Schicht ist sehr hart. Furthermore, the invention makes it possible that the ball bearings can be pressed or glued into the housing, that is, in the bearing seat of the housing in a simple manner. The anodized layer is not destroyed and the insulating properties are preserved because such a layer is very hard.
Vorteilhafterweise besteht das gesamte Gehäuse aus Aluminium, wobei auch das gesamte Gehäuse eloxiert sein könnte. Wenn dann die Eloxalschicht farblich ausgestaltet ist, lässt sich zusätzlich ein optischer Effekt erzielen. Advantageously, the entire housing made of aluminum, wherein the entire housing could be anodized. If the anodized coating is then colored, an additional visual effect can be achieved.
Besonders vorteilhaft werden erfindungsgemäße Drehgeber in Antriebssystemen eingesetzt, die einen Motor aufweisen, der eine Antriebswelle zum Antreiben einer Vorrichtung durch den Motor aufweist und einen erfindungsgemäßen Drehgeber zur Erfassung der Winkellage der Antriebswelle, wobei das Rotationslager die Antriebswelle lagert und die Maßverkörperung mit der Antriebswelle verbunden ist. In solchen Systemen treten die Probleme der schädlichen Lagerströme nämlich vermehrt auf. Rotary encoders according to the invention are used particularly advantageously in drive systems which have a motor which has a drive shaft for driving a device through the motor and a rotary encoder according to the invention for detecting the angular position of the drive shaft, wherein the rotary bearing supports the drive shaft and the material measure is connected to the drive shaft , In such systems, the problems of harmful storage flows occur more frequently.
Um die Isolierung des Rotationslagers weiter zu verbessern, kann zumindest der Teil der Antriebswelle, der in dem Rotationslager gelagert ist, aus Aluminium bestehen und ebenfalls eloxiert sein. In order to further improve the isolation of the rotary bearing, at least the part of the drive shaft, which is mounted in the rotary bearing, consist of aluminum and also be anodized.
Solche Antriebssysteme sollten kompakt sein, weshalb es vorteilhaft ist, dass der Drehgeber mit dem Motor in einem gemeinsamen Gehäuse sitzt, wobei weiter die Steuerung des Motors mit dem Drehgeber verbunden ist. Such drive systems should be compact, which is why it is advantageous for the shaft encoder to be in a common housing with the motor, with the control of the motor also being connected to the shaft encoder.
Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung im Einzelnen erläutert. In the following the invention with reference to an embodiment with reference to the drawings will be explained in detail.
Die einzige Figur der Zeichnung zeigt eine schematische Darstellung eines erfindungsgemäßen Antriebssystems
Das Antriebssystem
Weiter weist das Antriebssystem
Die Signale des Messsensors
Das Rotationslager
Erfindungsgemäß besteht das Gehäuse
Selbstverständlich ist es sinnvoll und vorteilhaft, das gesamte Gehäuse
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 102007036271 A1 [0002] DE 102007036271 A1 [0002]
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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EP13152415 | 2013-01-23 | ||
EP13152415.9 | 2013-01-23 |
Publications (2)
Publication Number | Publication Date |
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DE202013102753U1 true DE202013102753U1 (en) | 2014-09-26 |
DE202013102753U8 DE202013102753U8 (en) | 2015-03-12 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE201320102753 Expired - Lifetime DE202013102753U1 (en) | 2013-01-02 | 2013-06-25 | Rotary encoder and drive system |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019119224A1 (en) * | 2019-07-16 | 2021-01-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Bearing cap |
US11002315B2 (en) | 2018-04-24 | 2021-05-11 | Aktiebolaget Skf | Rolling bearing having electrical insulating material, and manufacturing process of such rolling bearing |
US11204066B2 (en) * | 2019-11-28 | 2021-12-21 | Aktiegolaget Skf | Insulating device for a bearing |
US11309775B2 (en) | 2018-03-20 | 2022-04-19 | Aktiebolaget Skf | Fiber grounding brush assembly |
EP4249855A1 (en) * | 2022-03-22 | 2023-09-27 | Johannes Hübner Fabrik Elektrischer Maschinen GmbH | Rotary encoder and method for operating a rotary encoder |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007036271A1 (en) | 2007-07-31 | 2009-02-05 | Baumer Hübner GmbH | Encoder with monitoring of bearing wear and method |
-
2013
- 2013-06-25 DE DE201320102753 patent/DE202013102753U1/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007036271A1 (en) | 2007-07-31 | 2009-02-05 | Baumer Hübner GmbH | Encoder with monitoring of bearing wear and method |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11309775B2 (en) | 2018-03-20 | 2022-04-19 | Aktiebolaget Skf | Fiber grounding brush assembly |
US11002315B2 (en) | 2018-04-24 | 2021-05-11 | Aktiebolaget Skf | Rolling bearing having electrical insulating material, and manufacturing process of such rolling bearing |
DE102019119224A1 (en) * | 2019-07-16 | 2021-01-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Bearing cap |
US11162537B2 (en) | 2019-07-16 | 2021-11-02 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Bearing cover |
US11204066B2 (en) * | 2019-11-28 | 2021-12-21 | Aktiegolaget Skf | Insulating device for a bearing |
US11698106B2 (en) | 2019-11-28 | 2023-07-11 | Aktiebolaget Skf | Insulating device for a bearing |
EP4249855A1 (en) * | 2022-03-22 | 2023-09-27 | Johannes Hübner Fabrik Elektrischer Maschinen GmbH | Rotary encoder and method for operating a rotary encoder |
DE102022106688A1 (en) | 2022-03-22 | 2023-09-28 | Johannes Hübner Fabrik elektrischer Maschinen Gesellschaft mit beschränkter Haftung | Rotary encoder and method for operating a rotary encoder |
Also Published As
Publication number | Publication date |
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DE202013102753U8 (en) | 2015-03-12 |
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Legal Events
Date | Code | Title | Description |
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R207 | Utility model specification |
Effective date: 20141106 |
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R150 | Utility model maintained after payment of first maintenance fee after three years | ||
R157 | Lapse of ip right after 6 years |