DE4131284A1 - Roller cage for needle bearings - includes axial slot(s) with elastic stays joined in one piece with cage ends of rigid plastic material - Google Patents

Roller cage for needle bearings - includes axial slot(s) with elastic stays joined in one piece with cage ends of rigid plastic material

Info

Publication number
DE4131284A1
DE4131284A1 DE19914131284 DE4131284A DE4131284A1 DE 4131284 A1 DE4131284 A1 DE 4131284A1 DE 19914131284 DE19914131284 DE 19914131284 DE 4131284 A DE4131284 A DE 4131284A DE 4131284 A1 DE4131284 A1 DE 4131284A1
Authority
DE
Germany
Prior art keywords
cage
webs
slot
rolling bearing
plastic
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Withdrawn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
DE19914131284
Other languages
German (de)
Inventor
Hartwig Waldert
Wolfgang Dipl Ing Steinberger
Leo Muentnich
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.)
INA Waelzlager Schaeffler OHG
Original Assignee
INA Waelzlager Schaeffler OHG
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 INA Waelzlager Schaeffler OHG filed Critical INA Waelzlager Schaeffler OHG
Priority to DE19914131284 priority Critical patent/DE4131284A1/en
Publication of DE4131284A1 publication Critical patent/DE4131284A1/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Withdrawn legal-status Critical Current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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4694—Single-split roller or needle cages
    • 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
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/463—Needle bearings with one row or needles consisting of needle rollers held in a cage, i.e. subunit without race rings
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/4635—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages

Abstract

Roller cage has at least one axial slot with elastic stays joined in one piece with the adjacent cage ends. The stays are formed of flexible and the cage of comparatively rigid plastic material. The plastic cage (1) is pref. reinforced by fibres and divided into equal halves by two axial slots (3). The stays (5) on each radial side of the slot are of bow form with the convex sides towards each other and connected to the axial ends of the adjacent cage. ADVANTAGE - Provides a roller cage construction for needle bearings with improved running characteristics and reliability.

Description

Die Erfindung betrifft einen Wälzlagerkäfig für Nadellager, mit wenig­ stens einem durchgehenden, vorzugsweise axial verlaufenden Schlitz, wobei im Bereich des Schlitzes elastische Stege vorgesehen sind, die einstückig mit den Schlitz begrenzenden Käfigenden verbunden sind.The invention relates to a roller bearing cage for needle bearings, with little at least one continuous, preferably axially extending slot, wherein elastic webs are provided in the region of the slot are integrally connected to the slot-limiting cage ends.

Käfige der beschriebenen Art werden in Nadellagern von Losradlagerun­ gen in Getrieben verwendet. Wenn die wälzgelagerten Bauteile synchron umlaufen, unterstützt die Durchmesserveränderung ein Wandern des Käfigs. Solche Käfige sind normalerweise wälzkörpergeführt, das heißt, die Nadeln liegen ohne Spiel in den Taschen des Käfigs, so daß eine Wanderbewegung des Käfigs auf alle Nadeln übertragen wird. Auf diese Weise wird die sogenannte Riffelbildung in den Laufbahnen der Nadeln vermieden. Diese Käfige werden üblicherweise aus einem formstabilen, steifen Kunststoff gebildet, der zusätzlich durch in den Kunststoff eingebettetes Fasermaterial verstärkt werden kann. Die Wahl eines steifen, formstabilen Kunststoffs für den Käfig gewährleistet, daß die Nadeln spielfrei in den Taschen angeordnet sind, und deshalb der Käfig über die Nadeln einwandfrei geführt wird. Damit eine maschinelle Montage der Käfige durchgeführt werden kann, müssen die Käfigenden einander gegenüberstehen. Dazu werden die Käfigenden miteinander verbunden.Cages of the type described are in needle roller bearings from loose wheel bearings used in gears. When the rolling bearing components are in sync circulate, the change in diameter supports a migration of the Cage. Such cages are usually guided on rolling elements, i.e. the needles lie without play in the pockets of the cage, so that one Movement of the cage is transmitted to all needles. To this The so-called corrugation in the raceways of the needles becomes wise avoided. These cages are usually made of a dimensionally stable, stiff plastic formed which is additionally through in the plastic embedded fiber material can be reinforced. Choosing one Rigid, dimensionally stable plastic for the cage ensures that the Needles are arranged in the pockets without play, and therefore the cage is properly guided over the needles. So that a machine Assembly of the cages can be done, the cage ends face each other. To do this, the cage ends together connected.

In dem Dokument DE-GM 87 15 732 wird vorgeschlagen, daß als Verbin­ dungsmittel für die Käfigenden elastische Stege eingesetzt werden, die einstückig an die gegenüberliegenden Käfigenden angeformt sind. Da die Stege auch aus wirtschaftlichen Gründen aus dem gleichen Material wie der Käfig gebildet sind, also aus einem steifen und formstabilen Kunststoff, besteht das Risiko, daß die Elastizität der Stege nicht ausreicht, um einen Stegbruch zu verhindern. Dieses Risiko wird bei der Verwendung von faserverstärktem Kunststoff noch erhöht, da die im Kunststoff eingebetteten Fasern den Käfig und damit auch die Stege zusätzlich versteifen. Abgebrochene Stege können in die Laufbahnen der Nadeln gelangen und so die Zerstörung des Lagers herbeiführen.In document DE-GM 87 15 732 it is proposed that as a verb elastic means for the cage ends are used, the  are integrally formed on the opposite cage ends. Since the For economic reasons, the bridges are made of the same material as the cage are formed, i.e. from a rigid and dimensionally stable Plastic, there is a risk that the elasticity of the webs will not sufficient to prevent a web break. This risk is at the use of fiber-reinforced plastic increased because the im Plastic-embedded fibers make up the cage and thus also the webs additionally stiffen. Broken bridges can enter the careers of the Needles arrive and thus destroy the camp.

Der Erfindung liegt die Aufgabe zugrunde, einen Käfig gemäß dem Ober­ begriff des Hauptanspruchs so weiterzubilden, daß eine hohe Betriebs­ sicherheit erreicht wird, ohne daß zusätzliche konstruktive Maßnahmen am Käfig selbst ergriffen werden müssen.The invention has for its object a cage according to the waiter Concept of the main claim to develop so that a high operating safety is achieved without additional constructive measures must be gripped on the cage itself.

Diese Aufgabe wird dadurch gelöst, daß die Stege aus biegsamen, ela­ stisch verformbaren und der Käfig aus einem formstabilen und ver­ gleichweise steifen Kunststoff gebildet werden.This object is achieved in that the webs made of flexible, ela deformable and the cage from a dimensionally stable and ver equally rigid plastic are formed.

Weil die Stege aus einem biegsamen, elastisch verformbaren Kunststoff gebildet werden, ist sichergestellt, daß die Stege bei der Montage oder während des Betriebs des montierten Käfigs nicht abbrechen kön­ nen. Weiterhin wird erreicht, daß die Kunststoffauswahl für den wälz­ körpergeführten Käfig einerseits und die Stege andererseits jeweils bezüglich der speziellen Funktionen optimiert werden kann. Die Ver­ minderung der Riffelbildungsgefahr wird dadurch unterstützt, daß die elastisch federnden Stege die Käfigenden voneinander wegdrücken und so eine bessere Anlage der Nadeln an deren äußeren Laufbahn bewirken. Nach einer bevorzugten Ausführung weisen die Stege in radialer Drauf­ sicht eine bogenförmige Gestalt auf, die das elastische Federn der Stege unterstützt.Because the webs are made of a flexible, elastically deformable plastic are formed, it is ensured that the webs during assembly or cannot break off while the assembled cage is in operation nen. It is also achieved that the plastic selection for the rolling body-guided cage on the one hand and the webs on the other hand each can be optimized with regard to the special functions. The Ver reducing the risk of corrugation is supported by the fact that resilient webs push the cage ends away from each other and so bring about better contact of the needles with their outer race. According to a preferred embodiment, the webs face radially reveals an arcuate shape that the elastic springs of the Supports bridges.

Der Vorteil der voneinander unabhängigen Kunststoffauswahl für die Stege und den Käfig wird besonders deutlich, wenn der Käfig durch Fasermaterial verstärkt ist, da dabei der Unterschied der elastischen Eigenschaften des Käfigs gegenüber denen der Stege besonders hervor­ tritt.The advantage of independent plastic selection for the Bridges and the cage become particularly evident when the cage is through Fiber material is reinforced because of the difference in elastic Properties of the cage stand out particularly from those of the webs  occurs.

Eine weitere Maßnahme zur Unterstützung des Käfigwanderns besteht darin, daß der Käfig durch zwei axial verlaufende Schlitze in zwei gleiche Hälften unterteilt ist. Die Käfighälften werden über die elastischen Stege gleichmäßig nach außen gedrückt, so daß mehr Nadeln an den äußeren Laufbahnen anliegen, als es bei einem mit nur einem Schlitz versehenen Käfig möglich ist.Another measure to support cage walking exists in that the cage has two axially extending slots in two is divided into equal halves. The cage halves are over the elastic webs evenly pressed outwards, so that more needles on the outer raceways than one with only one Slotted cage is possible.

Die Erfindung wird anhand von zwei Figuren näher erläutert.The invention is explained in more detail with reference to two figures.

Fig. 1 zeigt einen Lagersatz bestehend aus einem geschlitzten Käfig mit Nadeln, Fig. 1 shows a bearing set consisting of a slotted cage with needles,

Fig. 2 zeigt eine vergrößerte, radiale Draufsicht auf den Käfig nach Fig. 1 im Bereich der Schlitzstelle. FIG. 2 shows an enlarged, radial top view of the cage according to FIG. 1 in the area of the slot.

Zwischen Zahnrädern und Wellen von Getrieben werden üblicherweise Lagersätze eingebaut, wie sie in Fig. 1 gezeigt werden. Der Lagersatz besteht aus dem Käfig 1, in dessen Taschen über den Umfang verteilt Nadeln 2 eingefedert sind. Der Käfig 1 besitzt an einer Stelle seines Umfangs einen Schlitz 3.Bearing sets, as shown in FIG. 1, are usually installed between gear wheels and shafts of gearboxes. The bearing set consists of the cage 1 , in the pockets of which needles 2 are distributed over the circumference. The cage 1 has a slot 3 at one point on its circumference.

In Fig. 2 ist die Verbindung der beiden Käfigenden 4 dargestellt: Zwei in der radialen Draufsicht in etwa bogenförmige Stege 5 sind mit ihren Enden einstückig an die gegenüberliegenden Käfigenden 4 ange­ formt, wobei die konvexen Seiten 6 der Stege 5 einander zugewandt sind. In dieser Darstellung erfolgt die Anbindung der Stege 5 an den Randbereichen der Käfigenden 4. Es ist aber auch möglich, diese Anbin­ dung der Stege 5 in axialer Richtung weiter nach innen zu verlegen. Die Stege 5 sind in radialer Richtung innerhalb des Schlitzbereichs 3 vorgesehen.In Fig. 2, the connection of the two cage ends 4 is shown: Two in the radial plan view in approximately arc-shaped webs 5 are integrally formed with their ends on the opposite cage ends 4 , the convex sides 6 of the webs 5 facing each other. In this illustration, the webs 5 are connected to the edge regions of the cage ends 4 . But it is also possible to move this connec tion of the webs 5 further inwards in the axial direction. The webs 5 are provided in the radial direction within the slot area 3 .

BezugszahlenlisteList of reference numbers

1 Käfig
2 Nadeln
3 Schlitz
4 Käfigenden
5 Stege
6 konvexe Seite 1 cage
2 needles
3 slot
4 cage ends
5 bridges
6 convex side

Claims (6)

1. Wälzlagerkäfig für Nadellager mit wenigstens einem durchgehenden, vorzugsweise axial verlaufenden Schlitz, wobei im Bereich des Schlit­ zes elastische Stege vorgesehen sind, die einstückig mit den Schlitz begrenzenden Käfigenden verbunden sind, dadurch gekennzeichnet, daß die Stege (5) aus biegsamen, elastisch verformbaren und der Käfig (1) aus einem vergleichsweise formstabilen und steifen Kunststoff gebildet werden.1. Rolling bearing cage for needle roller bearings with at least one continuous, preferably axially extending slot, elastic webs being provided in the area of the slit, which are integrally connected to the slot-limiting cage ends, characterized in that the webs ( 5 ) made of flexible, elastically deformable and the cage ( 1 ) is formed from a comparatively dimensionally stable and rigid plastic. 2. Wälzlagerkäfig nach Anspruch 1, dadurch gekennzeichnet, daß der aus Kunststoff gebildete Käfig (1) durch Fasern verstärkt ist, die in den Kunststoff eingebettet sind.2. Rolling cage according to claim 1, characterized in that the plastic cage ( 1 ) is reinforced by fibers which are embedded in the plastic. 3. Wälzlagerkäfig nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Käfig (1) durch zwei axial gerichtete Schlitze (3) in zwei gleiche Hälften unterteilt ist.3. Rolling bearing cage according to claim 1 or 2, characterized in that the cage ( 1 ) by two axially directed slots ( 3 ) is divided into two equal halves. 4. Wälzlagerkäfig nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Stege (5) in radialer Richtung innerhalb des Schlitzbereichs (3) vorgesehen sind.4. Rolling bearing cage according to one of the preceding claims, characterized in that the webs ( 5 ) are provided in the radial direction within the slot region ( 3 ). 5. Wälzlagerkäfig nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Stege (5) in radialer Draufsicht eine im wesentlichen bogenförmige Gestalt besitzen, wobei konvexe Seiten (6) der Stege (5) einander zugewandt sind.5. Rolling bearing cage according to one of the preceding claims, characterized in that the webs ( 5 ) have a substantially arcuate shape in a radial plan view, with convex sides ( 6 ) of the webs ( 5 ) facing each other. 6. Wälzlagerkäfig nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Verbindung der Stege (5) mit den einander gegenüberliegenden Käfigenden (4) an den axialen Randbereichen der Käfigenden (4) vorgesehen ist.6. Rolling bearing cage according to one of the preceding claims, characterized in that the connection of the webs ( 5 ) with the opposite cage ends ( 4 ) is provided on the axial edge regions of the cage ends ( 4 ).
DE19914131284 1991-09-20 1991-09-20 Roller cage for needle bearings - includes axial slot(s) with elastic stays joined in one piece with cage ends of rigid plastic material Withdrawn DE4131284A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19914131284 DE4131284A1 (en) 1991-09-20 1991-09-20 Roller cage for needle bearings - includes axial slot(s) with elastic stays joined in one piece with cage ends of rigid plastic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914131284 DE4131284A1 (en) 1991-09-20 1991-09-20 Roller cage for needle bearings - includes axial slot(s) with elastic stays joined in one piece with cage ends of rigid plastic material

Publications (1)

Publication Number Publication Date
DE4131284A1 true DE4131284A1 (en) 1993-03-25

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DE19914131284 Withdrawn DE4131284A1 (en) 1991-09-20 1991-09-20 Roller cage for needle bearings - includes axial slot(s) with elastic stays joined in one piece with cage ends of rigid plastic material

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400718A1 (en) * 1994-01-13 1995-07-20 Schaeffler Waelzlager Kg Ball-bearing for rotary and/or lengthwise movement
DE102011075505A1 (en) 2011-05-09 2012-11-15 Schaeffler Technologies AG & Co. KG Axial roller bearing has rolling element pockets and spring pockets that are sequentially and alternately arranged in cage, and rolling elements that are respectively provided in rolling element pockets rather than spring pockets
DE102011075506A1 (en) 2011-05-09 2012-11-15 Schaeffler Technologies AG & Co. KG Radial bearing has two bearing rings and spherical rolling elements that are received in cage and are arranged between bearing rings, where cage is formed in one piece and has sinusoidal curve on its periphery
EP2518354A4 (en) * 2009-12-25 2017-12-06 NSK Ltd. Needle bearing
CN108071686A (en) * 2016-11-16 2018-05-25 舍弗勒技术股份两合公司 Rolling bearing with rolling bearing retainer

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1855943U (en) * 1962-05-24 1962-08-02 Schaeffler Ohg Industriewerk ROLLER BEARING CAGE FOR RADIAL BEARINGS.
US3399008A (en) * 1966-06-15 1968-08-27 Skf Ind Inc Roller cage assembly
GB2006350A (en) * 1977-10-18 1979-05-02 Skf Kugellagerfabriken Gmbh Cage for a rolling bearing
DE3000559A1 (en) * 1980-01-09 1981-07-16 Industriewerk Schaeffler Ohg, 8522 Herzogenaurach Split roller-bearing cage - has bosses on end rings extending into open pocket at split
DE8715732U1 (en) * 1987-11-27 1988-01-14 Fag Kugelfischer Georg Schaefer Kgaa, 8720 Schweinfurt, De
DE3718693A1 (en) * 1987-06-04 1988-12-22 Schaeffler Waelzlager Kg Bush-shaped injection-moulded component, particularly a roller bearing cage
DE9006526U1 (en) * 1990-06-09 1990-08-16 Skf Gmbh, 8720 Schweinfurt, De
DE3920689A1 (en) * 1989-06-21 1991-01-10 Mannesmann Ag ROLLER BEARING
DE4007452A1 (en) * 1990-03-09 1991-09-12 Legrom Gmbh Bearing cage for rolling bearings - has elastically resilient cage ends with projection on one and recess on other

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1855943U (en) * 1962-05-24 1962-08-02 Schaeffler Ohg Industriewerk ROLLER BEARING CAGE FOR RADIAL BEARINGS.
US3399008A (en) * 1966-06-15 1968-08-27 Skf Ind Inc Roller cage assembly
GB2006350A (en) * 1977-10-18 1979-05-02 Skf Kugellagerfabriken Gmbh Cage for a rolling bearing
DE3000559A1 (en) * 1980-01-09 1981-07-16 Industriewerk Schaeffler Ohg, 8522 Herzogenaurach Split roller-bearing cage - has bosses on end rings extending into open pocket at split
DE3718693A1 (en) * 1987-06-04 1988-12-22 Schaeffler Waelzlager Kg Bush-shaped injection-moulded component, particularly a roller bearing cage
DE8715732U1 (en) * 1987-11-27 1988-01-14 Fag Kugelfischer Georg Schaefer Kgaa, 8720 Schweinfurt, De
US5044787A (en) * 1987-11-27 1991-09-03 Fag Kugelfischer Georg Schafer (Kgaa) Slit cage, particularly for needle bearings
DE3920689A1 (en) * 1989-06-21 1991-01-10 Mannesmann Ag ROLLER BEARING
DE4007452A1 (en) * 1990-03-09 1991-09-12 Legrom Gmbh Bearing cage for rolling bearings - has elastically resilient cage ends with projection on one and recess on other
DE9006526U1 (en) * 1990-06-09 1990-08-16 Skf Gmbh, 8720 Schweinfurt, De

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400718A1 (en) * 1994-01-13 1995-07-20 Schaeffler Waelzlager Kg Ball-bearing for rotary and/or lengthwise movement
DE4400718C2 (en) * 1994-01-13 1998-04-09 Schaeffler Waelzlager Ohg Bearings for a longitudinal and rotary movement
EP2518354A4 (en) * 2009-12-25 2017-12-06 NSK Ltd. Needle bearing
DE102011075505A1 (en) 2011-05-09 2012-11-15 Schaeffler Technologies AG & Co. KG Axial roller bearing has rolling element pockets and spring pockets that are sequentially and alternately arranged in cage, and rolling elements that are respectively provided in rolling element pockets rather than spring pockets
DE102011075506A1 (en) 2011-05-09 2012-11-15 Schaeffler Technologies AG & Co. KG Radial bearing has two bearing rings and spherical rolling elements that are received in cage and are arranged between bearing rings, where cage is formed in one piece and has sinusoidal curve on its periphery
CN108071686A (en) * 2016-11-16 2018-05-25 舍弗勒技术股份两合公司 Rolling bearing with rolling bearing retainer

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