EP1957813A1 - Rolling bearing with heating element - Google Patents

Rolling bearing with heating element

Info

Publication number
EP1957813A1
EP1957813A1 EP06818119A EP06818119A EP1957813A1 EP 1957813 A1 EP1957813 A1 EP 1957813A1 EP 06818119 A EP06818119 A EP 06818119A EP 06818119 A EP06818119 A EP 06818119A EP 1957813 A1 EP1957813 A1 EP 1957813A1
Authority
EP
European Patent Office
Prior art keywords
rolling bearing
heating element
heated
bearing ring
thick
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Withdrawn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
EP06818119A
Other languages
German (de)
French (fr)
Inventor
Stefan GLÜCK
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 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 KG filed Critical Schaeffler KG
Publication of EP1957813A1 publication Critical patent/EP1957813A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S384/00—Bearings
    • Y10S384/90—Cooling or heating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49707—Bearing surface treatment

Definitions

  • the invention relates to rolling bearings which are assembled by shrinking onto a shaft or a similar frame element. Furthermore, the invention relates to rolling bearings which require an increased operating temperature for low-wear and precise operation, which is not yet available during the start-up phase.
  • the invention also relates to a method for assembling a rolling bearing.
  • the shrink-on process is often used when installing rolling bearings. For example, if a rolling bearing is to be mounted on a shaft, it is first heated. Due to the thermal expansion, it then has a slightly larger inner diameter. In contrast, the shaft remains at room temperature or is cooled, if necessary, in order then to have a smaller outside diameter.
  • the shaft and the roller bearing are dimensioned so that the roller bearing can only be pushed onto the shaft by slightly increasing the inner diameter.
  • the roller bearing is conventionally heated with the aid of heating plates, welding torches, ovens, inductive heating devices or the like.
  • the temperature of the roller bearing must be high enough after heating that the resulting increase in the inner diameter enables installation by sliding it open. However, the temperature must not become so high that the bearings are damaged or destroyed. Particular attention should be paid to any lubricant that may be introduced. If the rolling bearing has reached the assembly temperature, the assembly process must be carried out quickly since the rolling bearing cools down quickly after removal from the heat source and the inside diameter begins to decrease. If the rolling bearing has already cooled down during assembly on the shaft so that it can no longer be moved before the final position has been reached, the bearing is usually unusable. It can often only be detached from the shaft by damage or destruction. In some cases, the shaft is also unusable.
  • the rolling bearing can be heated in complex devices by means of adjustable heating plates, in which the temperature can be preselected while maintaining small tolerance ranges. If, on the other hand, you use simple heating plates, ovens or welding torches, there is a risk of the rolling bearing being destroyed by too high a temperature or of unsuccessful assembly significantly increased due to low temperature. In all known methods for forming a shrink fit of rolling bearings, external devices for heating are always required, which is a long-standing disadvantage of this type of connection for rolling bearings.
  • the invention is therefore based on the object of providing a rolling bearing, the rolling bearing ring of which can be shrunk on a shaft or a similar frame element can be heated to an assembly temperature without external devices and, if required, can also be kept at this temperature over a certain period of time.
  • a subtask is seen in guaranteeing an optimal temperature during the later operation of the rolling bearing even in start-up phases, in particular to provide an additional heat supply to the bearing.
  • An important aspect of the invention is the integration of an electrical heating element in or on the rolling bearing ring to be heated. In this respect, it is a lost heating element, since it is only available for heating a rolling bearing.
  • An advantage of this invention is in particular that the risk of unsuccessful assembly is drastically reduced, since the heating does not have to be ended before the assembly is completed.
  • the rolling bearing had to be removed for assembly from the external heating device, which causes the cooling to begin.
  • an electrical heating element on the roller bearing ring permits heating initially to a predetermined, reproducible temperature and, if necessary, continued supply of heat until assembly is complete. Under certain conditions, the invention also makes it possible to dismantle rolling bearings in frictional engagement with the shaft without damage.
  • the temperature gradient between the roller bearing and the frame element must be so large that the roller bearing can be heated by the integrated heating element to such an extent that it expands sufficiently and can be detached from the frame element.
  • This high temperature gradient can be brought about by a low heat conduction between the roller bearing and the frame element or a high thermal output introduced at the roller bearing.
  • the frame element can also be cooled.
  • the heating element is designed as a thick-film heating resistor.
  • thick-film heating resistors are inexpensive to manufacture, so that the costs for a rolling bearing according to the invention are not significantly increased.
  • such a thick-film heating resistor can be designed in such a way that it also has a current-insulating effect or, as an additional function, it also provides current insulation on the roller bearing or the roller bearing.
  • an originally provided current insulation can be substituted by this - in this case - multifunctional layer.
  • a temperature display means for example a film thermometer, is preferably arranged on the heated roller bearing ring on the roller bearing. This shows when the rolling bearing ring has reached the required temperature so that assembly can take place without unnecessary waiting times.
  • a temperature control unit in particular a fuse or a thermostat, is integrated in the heating element in the heating element, which cooperates with the heating element for temperature control and / or temperature control.
  • the fuse preferably interrupts the circuit when a predetermined limit temperature is exceeded.
  • the thermostat also preferably switches the energy supply to the heating element on or off when a predetermined limit temperature is exceeded and / or undershot.
  • the rolling bearing can also be supplied with electrical energy during later operation. This makes it possible to guarantee an optimal temperature of the rolling bearing even in the start-up phases. This is necessary, for example, if the lubricants used have the required viscosity only at the operating temperature and / or the required play conditions in the rolling bearing only occur at the operating temperature.
  • the heated roller bearing ring has grooves in which the heating element is arranged. The grooves increase the area for heat conduction between the heating element and the roller bearing ring, so that the roller bearing ring can be heated more quickly and efficiently. In addition, the heating element can thereby be made larger and more powerful.
  • the thick-film heating resistor is located on the running surface of the heated roller bearing ring. This makes it possible, especially in the case of flat roller bearing rings, to provide a sufficiently large area for heat transfer to the roller bearing ring. The thick-film resistor should then be such that it can be used in subsequent operation without damaging the bearing is rubbed off by the movement of the rolling elements.
  • FIG. 1 shows a side view of a rolling bearing with a thick-film heating resistor on the end face of the inner bearing ring.
  • a roller bearing 01 is designed as a ball bearing, with an otherwise conventional structure comprising an inner bearing ring 02 and an outer bearing ring 03.
  • Balls 04 which are guided in a cage 06, act as rolling elements.
  • the parts of the cage 06 are connected to one another by means of rivets 07.
  • a thick-film heating resistor 08 is printed on the end face of the inner roller bearing ring 02.
  • Such thick-film resistors can in their geometric shape the respective Carrier can be largely adapted. This makes it possible to design the thick-film heating resistor in this embodiment as a circular ring, which represents an optimal shape for the heat transfer on the end face of the rolling bearing ring 02.
  • the heating required for assembly takes place according to the invention with the aid of the thick-film heating resistor 08 by energizing it.
  • No external devices such as hot plates or inductive heating devices are required to heat the rolling bearing. Therefore, such bearings can also be assembled by fitters or end customers who rarely carry out such installations and therefore do not have suitable facilities for heating the rolling bearing. All you need is a suitable power source that feeds the thick-film heating resistor 08.
  • the thick-film heating resistor 08 can be designed in such a way that an ordinary socket of the power supply network or a car battery can serve as a power source.
  • the thick-film heating resistor 08 has electrical contacts 09 at its ends. Lines 11 are connected to contacts 09 for the electrical connection of thick-film heating resistor 08. Direct printing of the thick-film heating resistor on the inner roller bearing ring made of steel provides good heat-conducting contact with the inner roller bearing ring 02. If a current flows through the lines through the thick-film heating resistor 08, the thick-film heating resistor first heats up and consequently also the inner roller bearing ring 02. As a result of the heating, the inner roller bearing ring expands, so that its inner diameter increases. As soon as the assembly temperature is reached, assembly can begin. In contrast to the known methods, assembly can take place without time pressure since the bearing continues to be heated. The roller bearing 01 can be carefully mounted on the intended shaft or another frame element.
  • a time limitation is only given by the fact that after a long time that the roller bearing 01 remains at a position of the shaft, the shaft also heats up at this position.
  • a thermostat 12 is integrated in the thick-film heating resistor 08. If the temperature of the inner roller bearing ring 02 exceeds a specified temperature, the circuit to the thick-film heating resistor is interrupted. This ensures that the inner roller bearing ring 02 does not become so hot that the roller bearing is damaged or destroyed.
  • a temperature sensor can also be integrated in the thick-film heating resistor, which is connected to an integrated or external control of the current source of the thick-film heating resistor.

Abstract

The invention relates to a rolling bearing (01) having at least one heated rolling bearing ring, and to a method for mounting a rolling bearing (01) on a frame element with the formation of a shrink fit. In this rolling bearing, an electrical heating element (08) is applied with good thermally-conductive contact to a surface section of the heated rolling bearing ring (02), wherein the heat quantity which can be generated by the heating element (08) is dimensioned such that the heated rolling bearing ring (02) undergoes thermal expansion when heated, which permits the rolling bearing to be mounted on a frame element with the formation of a shrink fit during subsequent cooling.

Description

Bezeichnung der Erfindung  Name of the invention
Wälzlager mit Heizelement Rolling bearing with heating element
Beschreibung description
Gebiet der Erfindung Field of the Invention
Die Erfindung betrifft Wälzlager, die durch Aufschrumpfen auf eine Welle oder ein ähnliches Gestellelement montiert werden. Im Weiteren betrifft die Erfindung Wälzlager, die für einen verschleißarmen und präzisen Betrieb eine erhöhte Betriebstemperatur benötigen, welche während der Anlaufphase noch nicht zur Verfügung steht. Außerdem betrifft die Erfindung ein Verfahren zur Montage eines Wälzlagers. Bei der Montage von Wälzlagern kommt häufig das Aufschrumpfverfahren zur Anwendung. Soll beispielsweise ein Wälzlager auf eine Welle montiert werden, so wird es zunächst erwärmt. Auf Grund der thermischen Ausdehnung weist es dann einen geringfügig größeren Innendurchmesser auf. Hingegen verbleibt die Welle bei Zimmertemperatur oder wird gegebenenfalls gekühlt, um dann einen kleineren Außendurchmesser aufzuweisen. Die Welle und das Wälzlager sind so bemessen, dass sich das Wälzlager erst durch die geringfügige Innendurchmesservergrößerung auf die Welle aufschieben lässt. Nach dem Aufschieben des Wälzlagers kühlt es sich ab und der Innen- durchmesser verkleinert sich. Wälzlager und Welle sind nun reibeschlüssig miteinander verbunden, man spricht auch von einer Schrumpfpassung. Sollte es im Betrieb zu einer Erwärmung kommen, so werden sich das Wälzlager und die Welle auf Grund der räumlichen Nähe und der Wärmeleitung zwi- sehen ihnen gleichzeitig erwärmen. Insofern die Temperaturausdehnungskoeffizienten gleich oder ähnlich sind, werden sich Wälzlager und Welle auch im nahezu gleichen Maße ausdehnen, sodass die reibeschlüssige Verbindung erhalten bleibt. Eine solche Verbindung hat die Vorteile, dass sie sehr große Kräfte aufnehmen kann und dass man keine weiteren Verbin- dungsteile benötigt. The invention relates to rolling bearings which are assembled by shrinking onto a shaft or a similar frame element. Furthermore, the invention relates to rolling bearings which require an increased operating temperature for low-wear and precise operation, which is not yet available during the start-up phase. The invention also relates to a method for assembling a rolling bearing. The shrink-on process is often used when installing rolling bearings. For example, if a rolling bearing is to be mounted on a shaft, it is first heated. Due to the thermal expansion, it then has a slightly larger inner diameter. In contrast, the shaft remains at room temperature or is cooled, if necessary, in order then to have a smaller outside diameter. The shaft and the roller bearing are dimensioned so that the roller bearing can only be pushed onto the shaft by slightly increasing the inner diameter. After the rolling bearing has been pushed on, it cools down and the inner diameter decreases. Rolling bearing and shaft are now frictionally connected to each other, one speaks of a shrink fit. If heating occurs during operation, the roller bearing and the shaft will heat up at the same time due to the proximity and the heat conduction between them. Insofar as the thermal expansion coefficients are the same or similar, the rolling bearing and shaft will expand to almost the same extent, so that the frictional connection is maintained. Such a connection has the advantages that it can absorb very large forces and that no further connection parts are required.
Die Erwärmung des Wälzlagers erfolgt herkömmlich mit Hilfe von Heizplatten, Schweißbrennern, Öfen, induktiven Anwärmgeräten o. ä. Die Temperatur des Wälzlagers muss nach der Erwärmung so hoch sein, dass die resul- tierende Vergrößerung des Innendurchmessers eine Montage durch Aufschieben ermöglicht. Jedoch darf die Temperatur nicht so groß werden, dass die Lager geschädigt oder zerstört werden. Insbesondere ist hierbei auf ein gegebenenfalls eingebrachtes Schmiermittel zu achten. Hat das Wälzlager die Montagetemperatur erreicht, so muss der Montagevorgang zügig erfol- gen, da sich das Wälzlager nach dem Entfernen von der Wärmequelle schnell abkühlt und sich der Innendurchmesser zu verkleinern beginnt. Sollte sich das Wälzlager während der Montage auf der Welle bereits soweit abgekühlt haben, dass es nicht mehr verschiebbar ist, bevor die endgültige Position erreicht wurde, so wird das Lager meist unbrauchbar. Es kann oft nur durch Schädigung oder Zerstörung von der Welle gelöst werden. In einigen Fällen wird auch die Welle unbrauchbar. The roller bearing is conventionally heated with the aid of heating plates, welding torches, ovens, inductive heating devices or the like. The temperature of the roller bearing must be high enough after heating that the resulting increase in the inner diameter enables installation by sliding it open. However, the temperature must not become so high that the bearings are damaged or destroyed. Particular attention should be paid to any lubricant that may be introduced. If the rolling bearing has reached the assembly temperature, the assembly process must be carried out quickly since the rolling bearing cools down quickly after removal from the heat source and the inside diameter begins to decrease. If the rolling bearing has already cooled down during assembly on the shaft so that it can no longer be moved before the final position has been reached, the bearing is usually unusable. It can often only be detached from the shaft by damage or destruction. In some cases, the shaft is also unusable.
Die Erwärmung des Wälzlagers kann in aufwendigen Vorrichtungen mittels regelbarer Heizplatten erfolgen, bei denen die Temperatur unter Einhaltung kleiner Toleranzbereiche vorgewählt werden kann. Benutzt man hingegen einfache Heizplatten, Öfen oder Schweißbrenner, ist das Risiko einer Zerstörung des Wälzlagers durch eine zu hohe Temperatur oder das Risiko einer erfolglosen Montage wegen einer zu geringen Temperatur deutlich erhöht. Man ist bei allen bekannten Verfahren zur Ausbildung einer Schrumpfpassung von Wälzlagern immer auf externe Vorrichtungen zur Erwärmung angewiesen, was ein seit langem bestehender Nachteil dieser Verbindungsart für Wälzlager ist. The rolling bearing can be heated in complex devices by means of adjustable heating plates, in which the temperature can be preselected while maintaining small tolerance ranges. If, on the other hand, you use simple heating plates, ovens or welding torches, there is a risk of the rolling bearing being destroyed by too high a temperature or of unsuccessful assembly significantly increased due to low temperature. In all known methods for forming a shrink fit of rolling bearings, external devices for heating are always required, which is a long-standing disadvantage of this type of connection for rolling bearings.
Der Erfindung liegt somit die Aufgabe zugrunde, ein Wälzlager bereitzustellen, dessen auf einer Welle oder einem ähnlichen Gestellelement aufzuschrumpfender Wälzlagerring ohne externe Vorrichtungen auf eine Montage- temperatur erwärmt werden kann und bei Bedarf auch über einen bestimmten Zeitraum auf dieser Temperatur gehalten werden kann. Eine Teilaufgabe wird darin gesehen, während des späteren Betriebs des Wälzlagers eine optimale Temperatur auch in Anlaufphasen zu garantieren, insbesondere eine zusätzliche Wärmeversorgung am Lager bereitzustellen. The invention is therefore based on the object of providing a rolling bearing, the rolling bearing ring of which can be shrunk on a shaft or a similar frame element can be heated to an assembly temperature without external devices and, if required, can also be kept at this temperature over a certain period of time. A subtask is seen in guaranteeing an optimal temperature during the later operation of the rolling bearing even in start-up phases, in particular to provide an additional heat supply to the bearing.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des im Anspruch 1 angegebenen Gegenstands gelöst. This object is achieved by the features of the object specified in claim 1.
Ein wichtiger Aspekt der Erfindung besteht in der Integration eines elektri- sehen Heizelements in bzw. an den zu erwärmenden Wälzlagerring. Es handelt sich insoweit um ein verlorenes Heizelement, da es jeweils nur für die Erwärmung eines Wälzlagers zur Verfügung steht. Ein Vorteil dieser Erfindung besteht insbesondere darin, dass das Risiko einer erfolglosen Montage drastisch gesenkt ist, da die Erwärmung nicht vor der erfolgten Montage be- endet werden muss. Bei den bekannten Verfahren musste das Wälzlager zur Montage von der externen Vorrichtung zur Erwärmung entfernt werden, was den Beginn der Abkühlung bewirkt. Erfindungsgemäß erlaubt ein elektrisches Heizelement am Wälzlagerring eine Erwärmung zunächst auf eine vorgegebene, gut reproduzierbare Temperatur und bei Bedarf auch eine fortgesetzte Wärmezufuhr bis zum Abschluss der Montage. Unter bestimmten Voraussetzungen ist es durch die Erfindung auch möglich, dass in Reibschluss mit der Welle stehende Wälzlager ohne Beschädigung wieder zu demontieren. Dazu muss der Temperaturgradient zwischen Wälzlager und Gestellelement so groß sein, dass das Wälzlager durch das integ- rierte Heizelement so weit erwärmt werden kann, dass es sich genügend ausdehnt und vom Gestellelement lösbar ist. Dieser hohe Temperaturgradient kann durch eine geringe Wärmeleitung zwischen Wälzlager und Gestellelement oder eine hohe am Wälzlager eingebrachte Wärmeleistung bewirkt sein. Das Gestellelement kann zusätzlich gekühlt werden. An important aspect of the invention is the integration of an electrical heating element in or on the rolling bearing ring to be heated. In this respect, it is a lost heating element, since it is only available for heating a rolling bearing. An advantage of this invention is in particular that the risk of unsuccessful assembly is drastically reduced, since the heating does not have to be ended before the assembly is completed. In the known methods, the rolling bearing had to be removed for assembly from the external heating device, which causes the cooling to begin. According to the invention, an electrical heating element on the roller bearing ring permits heating initially to a predetermined, reproducible temperature and, if necessary, continued supply of heat until assembly is complete. Under certain conditions, the invention also makes it possible to dismantle rolling bearings in frictional engagement with the shaft without damage. For this purpose, the temperature gradient between the roller bearing and the frame element must be so large that the roller bearing can be heated by the integrated heating element to such an extent that it expands sufficiently and can be detached from the frame element. This high temperature gradient can be brought about by a low heat conduction between the roller bearing and the frame element or a high thermal output introduced at the roller bearing. The frame element can also be cooled.
In einer bevorzugten Ausführungsform ist das Heizelement als Dickschicht- heizwiderstand ausgeführt. Solche Dickschichtheizwiderstände sind kostengünstig herzustellen, sodass die Kosten für ein erfindungsgemäßes Wälzlager nicht deutlich gesteigert sind. In a preferred embodiment, the heating element is designed as a thick-film heating resistor. Such thick-film heating resistors are inexpensive to manufacture, so that the costs for a rolling bearing according to the invention are not significantly increased.
Weiterhin kann ein solcher Dickschichtheizwiderstand so ausgeführt sein, dass er gleichzeitig stromisolierende Wirkung hat bzw. dass er als zusätzliche Funktion auch eine Stromisolierung am Wälzlager bzw.des Wälzlagers bewirkt. In diesem Fall kann eine ursprünglich vorgesehen Stromisolierung durch diese - in diesem Fall - Mehrfunktionsschicht - substituiert werden. Furthermore, such a thick-film heating resistor can be designed in such a way that it also has a current-insulating effect or, as an additional function, it also provides current insulation on the roller bearing or the roller bearing. In this case, an originally provided current insulation can be substituted by this - in this case - multifunctional layer.
Vorzugsweise ist am Wälzlager ein Temperaturanzeigemittel, beispielsweise ein Folienthermometer am beheizten Wälzlagerring angeordnet. Dadurch ist erkennbar, wann der Wälzlagerring die erforderliche Temperatur erreicht hat, sodass die Montage ohne unnötige Wartezeiten erfolgen kann. A temperature display means, for example a film thermometer, is preferably arranged on the heated roller bearing ring on the roller bearing. This shows when the rolling bearing ring has reached the required temperature so that assembly can take place without unnecessary waiting times.
In einer bevorzugten Ausführungsform ist im Heizelement eine Temperaturkontrolleinheit, insbesondere eine Schmelzsicherung oder ein Thermostat, in das Heizelement integriert, die mit dem Heizelement zu einer Temperatur- Kontrolle und/oder Temperatursteuerung zusammenwirkt. Vorzugsweise unterbricht die Schmelzsicherung bei Überschreiten einer vorgegebenen Grenztemperatur den Stromkreis. Ebemfalls bevorzugt schaltet das Thermostat bei Über- und/oder Unterschreiten einer vorgebbaren Grenztemperatur die Energieversorgung zum Heizelement zu- oder ab. In a preferred embodiment, a temperature control unit, in particular a fuse or a thermostat, is integrated in the heating element in the heating element, which cooperates with the heating element for temperature control and / or temperature control. The fuse preferably interrupts the circuit when a predetermined limit temperature is exceeded. The thermostat also preferably switches the energy supply to the heating element on or off when a predetermined limit temperature is exceeded and / or undershot.
Damit ist gewährleistet, dass das Wälzlager nicht zu heiß wird und dadurch eine Schädigung oder Zerstörung erfährt. Dies kann bei den bekannten Wälzlagern insbesondere dann sehr leicht passieren, wenn man keine aufwändige Vorrichtung zum Erwärmen auf einen eingeschränkten Temperatur- bereich zur Verfügung hat. This ensures that the rolling bearing does not become too hot and is thereby damaged or destroyed. In the known roller bearings, this can happen very easily, in particular, if there is no complex device for heating to a limited temperature range.
In einer besonderen Ausführungsform ist eine Versorgung des Wälzlagers mit elektrischer Energie auch während des späteren Betriebes möglich. Dadurch ist es möglich, eine optimale Temperatur des Wälzlagers auch in den Anlaufphasen zu garantieren. Dies ist beispielsweise notwendig, wenn die verwendeten Schmiermittel erst bei Betriebstemperatur die erforderliche Viskosität aufweisen oder/und sich erst bei Betriebstemperatur die erforderlichen Spielverhältnisse im Wälzlager einstellen. In einer weiteren Ausführungsform weist der beheizte Wälzlagerring Nuten auf, in welchen das Heizelement angeordnet ist. Durch die Nuten ist die Fläche für die Wärmeleitung zwischen Heizelement und Wälzlagerring vergrößert, sodass die Erwärmung des Wälzlagerringes schneller und effizienter erfolgen kann. Zudem kann dadurch das Heizelement größer und leis- tungsstärker ausgeführt sein. In a special embodiment, the rolling bearing can also be supplied with electrical energy during later operation. This makes it possible to guarantee an optimal temperature of the rolling bearing even in the start-up phases. This is necessary, for example, if the lubricants used have the required viscosity only at the operating temperature and / or the required play conditions in the rolling bearing only occur at the operating temperature. In a further embodiment, the heated roller bearing ring has grooves in which the heating element is arranged. The grooves increase the area for heat conduction between the heating element and the roller bearing ring, so that the roller bearing ring can be heated more quickly and efficiently. In addition, the heating element can thereby be made larger and more powerful.
In einer besonderen Ausführungsform befindet sich der Dick- schichtheizwiderstand auf der Lauffläche des beheizten Wälzlagerringes. Dadurch ist es möglich, insbesondere auch bei flachen Wälzlagerringen eine ausreichend große Fläche zur Wärmeübertragung zum Wälzlagerring zur Verfügung zu stellen. Der Dickschichtwiderstand sollte dann so beschaffen sein, dass er im anschließenden Betrieb ohne Beschädigung des Lagers durch die Bewegung der Wälzkörper abgerieben wird. In a special embodiment, the thick-film heating resistor is located on the running surface of the heated roller bearing ring. This makes it possible, especially in the case of flat roller bearing rings, to provide a sufficiently large area for heat transfer to the roller bearing ring. The thick-film resistor should then be such that it can be used in subsequent operation without damaging the bearing is rubbed off by the movement of the rolling elements.
Ergänzend wird im nebengeordneten Anspruch 10 ein Verfahren zur Lösung der o.g. Aufgabe angegeben. Der besondere Vorteil dieses Verfahrens be- steht darin, dass das Wälzlager ohne umständliches Hantieren mit Anwärmgeräten montiert werden kann. Eine Voraussetzung ist, dass der Wärmeleitkoeffizient des beheizten Wälzlageringes eine Erwärmung des Wälzlagerringes bis zur Montagetemperatur ermöglicht. Die meisten Wälzlager sind aus Stahl gefertigt, für welche diese Voraussetzung gegeben ist. In besonderen Fällen kann aber auch eine zusätzliche Erwärmung mit externen Wärmequellen auf eine Grundtemperatur vorgenommen werden, so dass durch das integrierte Heizelement nur noch eine Zusatzheizung bereitgestellt wird. In addition, in the subordinate claim 10, a method for solving the above. Task specified. The particular advantage of this process is that the rolling bearing can be installed with heating devices without the hassle of handling. A prerequisite is that the thermal conductivity coefficient of the heated rolling bearing ring allows the rolling bearing ring to heat up to the installation temperature. Most rolling bearings are made of steel, for which this requirement is met. In special cases, however, additional heating can be carried out with external heat sources to a basic temperature, so that only an additional heating is provided by the integrated heating element.
Von Vorteil ist es, das erfindungsgemäße Verfahren so auszuführen, dass der Dickschichtheizwiderstand bis zum Ansetzen des Wälzlagers am Gestellelement mit elektrischer Energie versorgt wird. Dadurch kühlt das Wälzlager nicht vorzeitig ab, was zu einer erfolglosen Montage führen kann. Damit ist das Verfahren ohne Zeitdruck ausführbar. Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschrieben. It is advantageous to carry out the method according to the invention in such a way that the thick-film heating resistor is supplied with electrical energy until the rolling bearing is attached to the frame element. As a result, the rolling bearing does not cool prematurely, which can lead to unsuccessful assembly. The process can thus be carried out without time pressure. An embodiment of the invention is shown in the drawing and is described in more detail below.
Die einzige Fig. 1 zeigt eine Seitenansicht eines Wälzlagers mit einem Dickschichtheizwiderstand auf der Stirnseite des inneren Lagerringes. The only Fig. 1 shows a side view of a rolling bearing with a thick-film heating resistor on the end face of the inner bearing ring.
Bei dem dargestellten Beispiel ist ein Wälzlager 01 als Kugellager ausgebildet, mit einem im Übrigen konventionellen Aufbau aus einem inneren Lagerring 02 und einem äußeren Lagerring 03. Als Wälzkörper fungieren Kugeln 04, die in einem Käfig 06 geführt sind. Die Teile des Käfigs 06 sind mit Hilfe von Nieten 07 miteinander verbunden. Auf der Stirnseite des inneren Wälzlagerringes 02 ist ein Dickschichtheizwiderstand 08 aufgedruckt. Solche Dickschichtwiderstände können in ihrer geometrischen Form dem jeweiligen Träger weitgehend angepasst werden. Dadurch ist es möglich, den Dick- schichtheizwiderstand in dieser Ausführungsform als Kreisring zu gestalten, der auf der Stirnseite des Wälzlagerringes 02 eine optimale Form für die Wärmeübertragung darstellt. Die für die Montage erforderliche Erwärmung erfolgt erfindungsgemäß mit Hilfe des Dickschichtheizwiderstandes 08, indem dieser bestromt wird. Man benötigt keine externen Einrichtungen wie Heizplatten oder induktive Aufwärmgeräte zur Erwärmung des Wälzlagers. Daher können solche Lager auch von Monteuren oder Endkunden montiert werden, die solche Montagen nur selten ausführen und daher nicht über geeignete Einrichtungen zur Erwärmung des Wälzlagers verfügen. Man benötigt lediglich eine geeignete Stromquelle, die den Dickschichtheizwider- stand 08 speist. Der Dickschichtheizwiderstand 08 kann so ausgeführt sein, dass eine gewöhnliche Steckdose des Stromversorgungsnetzes oder eine Autobatterie als Stromquelle dienen kann. In the example shown, a roller bearing 01 is designed as a ball bearing, with an otherwise conventional structure comprising an inner bearing ring 02 and an outer bearing ring 03. Balls 04, which are guided in a cage 06, act as rolling elements. The parts of the cage 06 are connected to one another by means of rivets 07. A thick-film heating resistor 08 is printed on the end face of the inner roller bearing ring 02. Such thick-film resistors can in their geometric shape the respective Carrier can be largely adapted. This makes it possible to design the thick-film heating resistor in this embodiment as a circular ring, which represents an optimal shape for the heat transfer on the end face of the rolling bearing ring 02. The heating required for assembly takes place according to the invention with the aid of the thick-film heating resistor 08 by energizing it. No external devices such as hot plates or inductive heating devices are required to heat the rolling bearing. Therefore, such bearings can also be assembled by fitters or end customers who rarely carry out such installations and therefore do not have suitable facilities for heating the rolling bearing. All you need is a suitable power source that feeds the thick-film heating resistor 08. The thick-film heating resistor 08 can be designed in such a way that an ordinary socket of the power supply network or a car battery can serve as a power source.
An seinen Enden weist der Dickschichtheizwiderstand 08 elektrische Kontakte 09 auf. Für den elektrischen Anschluss des Dickschichtheizwiderstandes 08 sind Leitungen 11 an den Kontakten 09 angeschlossen. Durch das unmittelbare Aufdrucken des Dickschichtheizwiderstandes auf den aus Stahl ge- fertigten inneren Wälzlagerring ist ein gut wärmeleitender Kontakt zum inneren Wälzlagerring 02 gegeben. Fließt ein Strom über die Leitungen durch den Dickschichtheizwiderstand 08, so erwärmt sich zunächst der Dickschichtheizwiderstand und infolgedessen auch der innere Wälzlagerring 02. Durch die Erwärmung dehnt sich der innere Wälzlagering aus, sodass des- sen Innendurchmesser größer wird. Sobald die Montagetemperatur erreicht ist, kann die Montage beginnen. Anders als bei den bekannten Verfahren kann die Montage ohne Zeitdruck erfolgen, da das Lager weiterhin erwärmt wird. Das Wälzlager 01 kann sorgfältig auf die vorgesehene Welle oder einem anderen Gestellelement montiert werden. Eine Zeitbeschränkung ist lediglich dadurch gegeben, dass nach längerer Zeit des Verbleibens des Wälzlagers 01 an einer Position der Welle sich auch die Welle an dieser Position erwärmt. Beim dargestellten Beispiel ist im Dickschichtheizwiderstand 08 ein Thermostat 12 integriert. Übersteigt die Temperatur des inneren Wälzlagerringes 02 eine festgelegte Temperatur, wird der Stromkreis zum Dickschichtheizwi- derstand unterbrochen. Dadurch ist gewährleistet, dass der innere Wälzlagerring 02 nicht so heiß wird, dass das Wälzlager geschädigt oder zerstört wird. Statt eines Thermostates kann auch ein Temperatursensor im Dickschichtheizwiderstand integriert sein, der an eine integrierte oder externe Steuerung der Stromquelle des Dickschichtheizwiderstandes angeschlossen ist. The thick-film heating resistor 08 has electrical contacts 09 at its ends. Lines 11 are connected to contacts 09 for the electrical connection of thick-film heating resistor 08. Direct printing of the thick-film heating resistor on the inner roller bearing ring made of steel provides good heat-conducting contact with the inner roller bearing ring 02. If a current flows through the lines through the thick-film heating resistor 08, the thick-film heating resistor first heats up and consequently also the inner roller bearing ring 02. As a result of the heating, the inner roller bearing ring expands, so that its inner diameter increases. As soon as the assembly temperature is reached, assembly can begin. In contrast to the known methods, assembly can take place without time pressure since the bearing continues to be heated. The roller bearing 01 can be carefully mounted on the intended shaft or another frame element. A time limitation is only given by the fact that after a long time that the roller bearing 01 remains at a position of the shaft, the shaft also heats up at this position. In the example shown, a thermostat 12 is integrated in the thick-film heating resistor 08. If the temperature of the inner roller bearing ring 02 exceeds a specified temperature, the circuit to the thick-film heating resistor is interrupted. This ensures that the inner roller bearing ring 02 does not become so hot that the roller bearing is damaged or destroyed. Instead of a thermostat, a temperature sensor can also be integrated in the thick-film heating resistor, which is connected to an integrated or external control of the current source of the thick-film heating resistor.
Bezugszeichen Reference numerals
01 Wälzlager 01 roller bearings
02 innerer Wälzlagerring 02 inner rolling bearing ring
03 äußerer Wälzlagerring  03 outer bearing ring
04 Wälzkörper (Kugeln)  04 rolling elements (balls)
05 - 05 -
06 Käfig 06 cage
07 Nieten 07 rivets
08 Dickschichtheizwide rstand  08 Thick film heating stand
09 elektrische Kontakte  09 electrical contacts
10 - 10 -
11 elektrische Leitungen 11 electrical lines
12 Thermostat 12 thermostat

Claims

Patentansprüche Claims
1. Wälzlager (01) mit mindestens einem beheizten Wälzlagerring (02), dadurch gekennzeichnet, dass ein elektrisches Heizelement (08) in gut wärmeleitendem Kontakt auf einem Oberflächenabschnitt des beheizten Wälzlagerringes (02) aufgebracht ist, wobei die vom Heizelement (08) generierbare Wärmemenge so bemessen ist, dass der beheizte1. Rolling bearing (01) with at least one heated rolling bearing ring (02), characterized in that an electrical heating element (08) is applied in good heat-conducting contact on a surface section of the heated rolling bearing ring (02), the amount of heat that can be generated by the heating element (08) is dimensioned so that the heated
Wälzlagerring (02) beim Aufheizen eine thermische Ausdehnung erfährt, welche die Montage des Wälzlagers an einem Gestellelement unter Ausbildung einer Schrumpfpassung bei nachfolgender Abkühlung ermöglicht. Rolling ring (02) experiences a thermal expansion during heating, which enables the rolling bearing to be mounted on a frame element with the formation of a shrink fit with subsequent cooling.
2. Wälzlager nach Anspruch 1 , dadurch gekennzeichnet, dass das Heizelement (08) als Dickschichtheizwiderstand ausgeführt ist, der auf den beheizten Wälzlagerring (02) aufgedruckt ist. 2. Rolling bearing according to claim 1, characterized in that the heating element (08) is designed as a thick-film heating resistor which is printed on the heated rolling bearing ring (02).
3. Wälzlager nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Heizelement (08) auf den Stirnseiten des beheizten Wälzlagerringes (02) aufgebracht ist. 3. Rolling bearing according to claim 1 or 2, characterized in that the heating element (08) is applied to the end faces of the heated rolling bearing ring (02).
4. Wälzlager nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass in der Oberfläche des beheizten Wälzlagerringes (02) Nuten eingebracht sind, in welchen das Heizelement (08) angeordnet ist. 4. Rolling bearing according to one of claims 1 to 3, characterized in that in the surface of the heated rolling bearing ring (02) grooves are made, in which the heating element (08) is arranged.
5. Wälzlager nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Heizelement (08) auch nach der Montage am Gestell mit e- lektrischer Energie versorgbar ist, um eine gewünschte Lagertemperatur einstellen zu können. 5. Rolling bearing according to one of claims 1 to 4, characterized in that the heating element (08) can be supplied with electrical energy even after assembly on the frame in order to be able to set a desired bearing temperature.
6. Wälzlager nach Anspruch 2, dadurch gekennzeichnet, dass der Dick- schichtheizwiderstand (08) auf die Lauffläche des Wälzlagerringes (02) aufgedruckt ist und aus einem Material besteht, welches im anschließenden Betrieb durch die Wälzlagerkörper (04) ohne Beschädigung des Lagers abgerieben wird. 6. Rolling bearing according to claim 2, characterized in that the thick-film heating resistor (08) is printed on the running surface of the rolling bearing ring (02) and consists of a material which is subsequently rubbed off by the rolling bearing body (04) without damaging the bearing .
7. Wälzlager nach mindestens einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass der Dickschichtheizwiderstand (08) als Stromisolation am Wälzlager vorgesehen ist. 7. Rolling bearing according to at least one of the preceding claims, characterized in that the thick-film heating resistor (08) is provided as current insulation on the rolling bearing.
8. Wälzlager nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass ein Temperatursensor und/oder ein Thermostat (12) in das Heizelement (08) integriert ist. 8. Rolling bearing according to one of claims 1 to 7, characterized in that a temperature sensor and / or a thermostat (12) is integrated in the heating element (08).
9. Wälzlager nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass weiterhin ein Temperaturanzeigemittel, insbesondere ein Folienthermometer am beheizten Wälzlagerring (02) angeordnet ist, welches das Erreichen der Montagetemperatur signalisiert. 9. Rolling bearing according to one of claims 1 to 8, characterized in that a temperature display means, in particular a film thermometer is arranged on the heated rolling bearing ring (02), which signals that the assembly temperature has been reached.
10. Wälzlager nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass weiterhin eine Temperaturkontrolleinheit, insbesondere eine Schmelzsicherung oder ein Thermostat, in das Heizelement (08) integriert ist, die mit dem Heizelement zu einer Temperaturkontrolle und/oder Temperatursteuerung zusammenwirkt. 10. Rolling bearing according to one of claims 1 to 9, characterized in that a temperature control unit, in particular a fuse or a thermostat, is integrated in the heating element (08), which cooperates with the heating element for temperature control and / or temperature control.
11. Wälzlager nach Anspruch 10, dadurch gekennzeichnet, dass, die Schmelzsicherung bei Überschreiten einer vorgegebenen Grenztemperatur die Energieversorgung zum Heizelement unterbricht und/oder das Thermostat bei Über- und/oder Unterschreiten einer vorgebbaren11. Rolling bearing according to claim 10, characterized in that, the fuse interrupts the energy supply to the heating element when a predetermined limit temperature is exceeded and / or the thermostat when a predetermined limit is exceeded and / or fallen below
Grenztemperatur die Energieversorgung zum Heizelement zu- oder abschaltet. Limit temperature switches the energy supply to the heating element on or off.
12. Verfahren zur Montage eines Wälzlagers (01) an einem Gestellele- ment, unter Ausbildung einer Schrumpfpassung, die folgenden Schritte umfassend: 12. A method for mounting a rolling bearing (01) on a frame element, forming a shrink fit, comprising the following steps:
- Aufdrucken eines Dickschichtheizwiderstands (08) auf einen beheizten Wälzlagerring (02) des Wälzlagers; - Printing a thick-film heating resistor (08) on a heated roller bearing ring (02) of the roller bearing;
- Aufheizen des beheizten Wälzlagerrings (02) durch elektrische Versorgung des Dickschichtheizwiderstands (08) bis der Wälzlagerring eine Ausdehnung erfahren hat, welche die Montage am Gestellelement gestattet; - Heating up the heated roller bearing ring (02) by electrical supply to the thick-film heating resistor (08) until the roller bearing ring has undergone an expansion which permits assembly on the frame element;
- Montage des Wälzlagers (01) am Gestellelement; - Assembly of the rolling bearing (01) on the frame element;
- Abkühlen des beheizten Wälzlagerrings (02) zur Ausbildung der Schrumpfpassung. - Cooling the heated roller bearing ring (02) to form the shrink fit.
13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass der Dick- schichtheizwiderstand (08) mit elektrischer Energie versorgt wird, bis das Wälzlager am Gestellelement angesetzt ist. 13. The method according to claim 12, characterized in that the thick-film heating resistor (08) is supplied with electrical energy until the rolling bearing is attached to the frame element.
EP06818119A 2005-12-06 2006-12-05 Rolling bearing with heating element Withdrawn EP1957813A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005058141A DE102005058141A1 (en) 2005-12-06 2005-12-06 Rolling bearing with heating element
PCT/DE2006/002151 WO2007065412A1 (en) 2005-12-06 2006-12-05 Rolling bearing with heating element

Publications (1)

Publication Number Publication Date
EP1957813A1 true EP1957813A1 (en) 2008-08-20

Family

ID=37795734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06818119A Withdrawn EP1957813A1 (en) 2005-12-06 2006-12-05 Rolling bearing with heating element

Country Status (5)

Country Link
US (1) US7950857B2 (en)
EP (1) EP1957813A1 (en)
JP (1) JP2009518606A (en)
DE (1) DE102005058141A1 (en)
WO (1) WO2007065412A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2337960A1 (en) * 2008-09-30 2011-06-29 Aktiebolaget SKF Bearing heater
DE102010049953B4 (en) 2010-10-21 2021-04-15 Imo Holding Gmbh Arrangement with devices for integrated cooling and / or heating and a method for integrated heating or cooling
EP2520797B1 (en) * 2011-05-03 2015-10-21 Siemens Aktiengesellschaft Direct drive wind turbine with a thermal control system
DE102013001116B4 (en) 2013-01-23 2015-09-03 Audi Ag Wheel bearing for the rotational mounting of a wheel hub of a vehicle
DE102013001114B4 (en) 2013-01-23 2015-09-03 Audi Ag Wheel bearing for the rotational mounting of a wheel hub of a vehicle
DE102013001115A1 (en) 2013-01-23 2014-07-24 Audi Ag Wheel bearing i.e. double-row bearing, for rotatory supporting of wheel hub of vehicle, has storage space sealed with sealing element, and heating element arranged at sealing element in order to heat storage space
DE102014108282A1 (en) 2014-06-12 2015-12-17 Osram Opto Semiconductors Gmbh Optoelectronic semiconductor component, method for producing an optoelectronic semiconductor component and light source with an optoelectronic semiconductor component
US9759263B1 (en) * 2014-11-13 2017-09-12 National Technology & Engineering Solutions Of Sandia, Llc Rotation flexure with temperature controlled modal frequency
KR101929210B1 (en) * 2014-11-21 2018-12-14 가부시키가이샤 하모닉 드라이브 시스템즈 Strain wave gearing device
DE102016214018B4 (en) * 2016-07-29 2022-01-27 Schaeffler Technologies AG & Co. KG Bearing arrangement, in particular for a turbomachine, and turbomachine with such a bearing arrangement
CN108869709A (en) * 2017-05-08 2018-11-23 舍弗勒技术股份两合公司 Oil discharge screw and gearbox for electric drive automobile gearbox

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0314912A (en) * 1989-06-09 1991-01-23 Koyo Seiko Co Ltd Rolling bearing

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451124A (en) * 1944-07-10 1948-10-12 Singer Mfg Co Bearing for electric motors
US2504284A (en) * 1947-03-27 1950-04-18 Int Harvester Co Preheating apparatus for machine tools
US3097027A (en) * 1961-03-21 1963-07-09 Barden Corp Thermoelectric cooling assembly
DE1274450B (en) * 1966-06-27 1968-08-01 Entwicklungsring Sued G M B H Pair of roller bearings, especially for rotatable pipe sections of jet pipes in aircraft
DE2145771A1 (en) * 1971-09-14 1973-03-22 Messerschmitt Boelkow Blohm PLASTIC WAREHOUSE
FR2474267A1 (en) * 1980-01-18 1981-07-24 Est Sarl Electro Mecanique Induction heater for bearing races on shaft - has two section laminated square cross-section rods of non-magnetic material which are used as mounting elements
JP2581054Y2 (en) * 1992-06-04 1998-09-17 株式会社小森コーポレーション Printer
DE4343418C2 (en) * 1993-12-18 1996-05-09 Michael Hampel Free rolling mechanism without sliding friction
DE19833983A1 (en) * 1998-07-29 2000-02-03 Ego Elektro Geraetebau Gmbh Method of manufacturing an electrical switching device and electrical switching device
DE29907768U1 (en) * 1999-05-03 1999-11-25 Paul Ruester & Co U No Flexible surface temperature sensor
DE20001339U1 (en) * 2000-01-27 2000-04-06 Overmeyer Albert roller bearing
DE10017572B4 (en) * 2000-04-10 2008-04-17 INSTITUT FüR MIKROTECHNIK MAINZ GMBH Rolling bearings with remote sensing units
DE102005007935A1 (en) * 2005-02-15 2006-08-24 E.G.O. Elektro-Gerätebau GmbH Heating device for an electrical appliance

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0314912A (en) * 1989-06-09 1991-01-23 Koyo Seiko Co Ltd Rolling bearing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2007065412A1 *

Also Published As

Publication number Publication date
WO2007065412A1 (en) 2007-06-14
JP2009518606A (en) 2009-05-07
US7950857B2 (en) 2011-05-31
DE102005058141A1 (en) 2007-07-12
US20080298733A1 (en) 2008-12-04

Similar Documents

Publication Publication Date Title
EP1957813A1 (en) Rolling bearing with heating element
DE60319637T2 (en) Threaded removable heating element for a hot runner nozzle
EP3098444B1 (en) Actuator for a rear viewing device of an automobile
EP0444144A1 (en) Thermostatic device.
WO2019228789A1 (en) Heat exchange device
DE102013001114B4 (en) Wheel bearing for the rotational mounting of a wheel hub of a vehicle
DE102018213497A1 (en) Means for heat exchange with an elastocaloric element which encloses a fluid line
DE102013215169A1 (en) OPTICAL DEVICE AND LITHOGRAPHY SYSTEM
DE202007008221U1 (en) Device for the transmission of thermal energy
DE102010029940B4 (en) Thermostat with blocking device
DE102013007983A1 (en) Rolling device
DE102016101945A1 (en) Hot riveting stamp and hot riveting device
DE102005040866B3 (en) Apparatus for converting thermal energy into electricity for use in motor vehicle, has piston which moves up and down in response to phase transition of working fluid filled in partial volumes of housing
WO2008098540A2 (en) Bearing comprising fixing elements consisting of a shape memory alloy
DE102007050368B4 (en) Device for clamping heating elements
DE102008007891B4 (en) Heating element, in particular for bearing mounting
DE10058505A1 (en) Process for heating plastic pipes and device for carrying out the process
DE102015008578B4 (en) hot runner nozzle
DE1158698B (en) Method and device for producing squeeze tubes from thermoplastic material
DE3816474C1 (en) Continuous grill
DE102018115396A1 (en) PASSIVATED RESETABLE VALVE
EP3242048A1 (en) Device with a frictional contact and method for operating a device comprising a frictional contact
DE102017010391A1 (en) Valve device for a flow-through coolant coolant circuit of a motor vehicle
EP3251779B1 (en) Device for providing a soldering medium and method of operating such a device
DE102009040097B4 (en) Arrangement for adjusting a component between two end positions

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080513

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20091120

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160808

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20161220

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230523