CH372509A - Plastic cage for roller bearings - Google Patents
Plastic cage for roller bearingsInfo
- Publication number
- CH372509A CH372509A CH6519758A CH6519758A CH372509A CH 372509 A CH372509 A CH 372509A CH 6519758 A CH6519758 A CH 6519758A CH 6519758 A CH6519758 A CH 6519758A CH 372509 A CH372509 A CH 372509A
- Authority
- CH
- Switzerland
- Prior art keywords
- plastic
- cage
- roller bearings
- plastic cage
- core
- Prior art date
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
- 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
- F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
-
- 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
- F16C33/38—Ball cages
- F16C33/3831—Ball cages with hybrid structure, i.e. with parts made of distinct materials
-
- 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
- F16C33/38—Ball cages
- F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
- F16C33/3843—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
- F16C33/3856—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/41—Ball cages comb-shaped
- F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
- F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
- F16C33/416—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb 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
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/60—Polyamides [PA]
-
- 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
- F16C2220/00—Shaping
- F16C2220/02—Shaping by casting
- F16C2220/04—Shaping by casting by injection-moulding
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Description
Kunststoff käfig für Wählager Man stellt Käfige für Wälzlager bereits aus Poly amiden und dergleichen Kunststoffen her, um deren Vorteile, nämlich hohe Abriebfestigkeit und gute Gleit- und Nolaufeigenschaft, auszunutzen. Ausser dem laufen Lager, die unter Verwendung solcher Kunststoffe hergestellt werden, wesentlich geräusch ärmer als reine Metallager. Nun haben diese Kunst stoffe die nachteilige Eigenschaft, Feuchtigkeit auf zunehmen und damit zu schwellen bzw. bei Feuchtig keitsabgabe zu schrumpfen. Hierdurch ist die Füh rung der Wälzkörper in ihrer Genauigkeit gefährdet.
Man hat daher bereits Kunststoffkäfige mit einem metallischen Kern, der mit einer Kunststoffauflage allseitig umgeben ist, hergestellt. Zu diesem Zweck musste der Metallkern die endgültige Käfigform ha ben, der dann vorzugsweise im Tauchverfahren mit einer gleichmässig dicken Kunststoffauflage umgeben wird.
Diese Ausführung hat noch folgenden Nachteil: Falls die Kunststoffauflage so dick gehalten wird<B>'</B> dass eine Geräuschdämpfung erzielt wird, dann ist die Auflage an den Stellen hoher Führungsgenauigkeit noch so dick, dass durch Quellen oder Schrumpfen die Führungsgenauigkeit beeinträchtigt wird. Auf diese Weise kann man Präzisionslager nicht her stellen.
Der vorliegenden Erfindung liegt nun die Auf gabe zu Grunde, die genannten Nachteile der Kunst stoffkäfige zu beheben, ohne ihre guten Eigenschaf ten zu vermindern oder sogar zu, beseitigen.
Die vorliegende Erfindung betrifft einen Kunst stoffkäfig für Wälzlager, bei dem ein metallischer Kern allseitig mit einer Kunststoffauflage umgeben ist. Der erfindungsgemässe Käfig ist dadurch gekenn zeichnet, dass die Kunststoffauflage formgenau um den Kern gespritzt ist und mindestens an den Stellen hoher Führungsgenauigkeit dünner gehalten ist. Da auf diese Weise die Masse des Kunststoffes bedeutend herabgesetzt wird, wird die mit der Feuchtigkeitsauf nahme bzw. -abgabe verbundene Quellung und Schrumpfung so sehr gemindert, dass sie sich nicht mehr störend auf die Passgenauigkeit und gute Füh rung auswirkt.
Diese Verbundausführung Kunststoff- Metall hat noch den Vorzug, schwingungsfrei zu sein, da die beiden Werkstoffe verschiedene Schwingungs frequenzen haben. Hierdurch wird die Lau#fruhe we- senthch gesteigert.
In der Zeichnung ist die Erfindung in zwei Aus führungsbeispielen dargestellt, und zwar zeigen: Fig. <B>1</B> einen Schnitt durch ein Rillenkugellager, Fig. 2 eine Aufsicht, teilweise im Schnitt, durch das in Fig. <B>1</B> im Schnitt gezeigte Rillenkugellager, Fig. <B>3</B> einen Schnitt längs der Linie III-111 der Fig. 2, Fig. 4 einen Schnitt längs der Linie IV-IV der Fig. 2, Fig. <B>5</B> eine Draufsicht,
mit teilweise weggebro- ebenen Teilen, auf ein Scheibenkugellager, Fig. <B>6</B> einen Schnitt längs der Linie VIII-VIII der Fig. <B>5,</B> Fig. <B>7</B> einen Schnitt längs der Linie IX-IX der Fig. <B>5.</B>
Das in den Fig. 1-4 dargestellte Rülenkugellager besteht aus dem inneren Ring<B>1,</B> dem äusseren Ring 2, dem Käfig<B>3</B> und den Kugeln 4. Der Käfig<B>3</B> ist ein seitig zur Aufnahme der Kugeln 4 offen und dient vornehmlich als Abstandshalter und zur Führung der Kugehi. Der Käfig<B>3</B> hat einen Metallkern 3a, der in Polyamid eingelagert ist. An den Führungsstellen<B>5</B> ist der Kunststoff dünner als an anderen Stellen des Metallkernes.
Der Kunststoff ist formgenau um den Kern 3a gespritzt, das heisst, dass die lückenlose Kunststoffumhüllung nach dem Spritzen die endgül- C <B>CD</B> tige Form des Käfigs besitzt.
Das in den Fig. <B>5-7</B> dargestellte Scheibenlager<B>10</B> besteht aus dem Käfig<B>11,</B> in den die Kugeln 12, wie im vorhergehenden Beispiel, eingedrückt werden. Der Käfig<B>11</B> hat den in dem Kunststoff<B>13</B> einggebetteten Metallkern 14. An den Führungsstellen<B>15</B> ist der Kunststoff dünner als an anderen Stellen des Metall kernes. Der Kunststoff<B>13</B> ist formgenau um den Kern 14 gespritzt, das heisst, dass der fertig gespritzte Kunststoff die endgültige Form des Käfigs besitzt.
Plastic cage for selector bearings Cages for roller bearings are already made from poly amides and similar plastics in order to take advantage of their advantages, namely high abrasion resistance and good sliding and rolling properties. In addition, bearings that are made using such plastics are much quieter than pure metal bearings. Now these plastics have the disadvantageous property of absorbing moisture and thus swelling or shrinking keitsabgabe with Feuchtig. As a result, the accuracy of the rolling elements is at risk.
Plastic cages with a metallic core that is surrounded on all sides with a plastic layer have therefore already been produced. For this purpose, the metal core had to have the final cage shape, which is then surrounded, preferably in the immersion process, with a uniformly thick plastic layer.
This embodiment also has the following disadvantage: If the plastic overlay is kept so thick that noise dampening is achieved, then the overlay is still so thick at the points of high guidance accuracy that the guidance accuracy is impaired by swelling or shrinking . Precision bearings cannot be made in this way.
The present invention is based on the task of eliminating the disadvantages mentioned of the plastic cages without reducing or even eliminating their good properties.
The present invention relates to a plastic cage for roller bearings, in which a metallic core is surrounded on all sides with a plastic layer. The cage according to the invention is characterized in that the plastic overlay is injection molded around the core with an accurate shape and is kept thinner at least at the points of high guidance accuracy. Since the mass of the plastic is significantly reduced in this way, the swelling and shrinkage associated with the absorption or release of moisture is reduced so much that it no longer interferes with the accuracy of fit and good guidance.
This composite plastic-metal version also has the advantage of being vibration-free, as the two materials have different vibration frequencies. This considerably increases the tepid early morning.
In the drawing, the invention is shown in two exemplary embodiments, specifically showing: FIG. 1 a section through a deep groove ball bearing, FIG. 2 a plan view, partially in section, through the one in FIG 1 deep groove ball bearings shown in section, FIG. 3 a section along the line III-111 of FIG. 2, FIG. 4 a section along the line IV-IV of FIG. 2, FIG . <B> 5 </B> a top view,
with partially broken-away parts on a disk ball bearing, Fig. 6 A section along the line VIII-VIII in Fig. 5, Fig. 7 / B > A section along the line IX-IX in FIG. 5
The sleeve ball bearing shown in FIGS. 1-4 consists of the inner ring <B> 1 </B> the outer ring 2, the cage <B> 3 </B> and the balls 4. The cage <B> 3 </B> is open on one side to accommodate the balls 4 and primarily serves as a spacer and to guide the ball. The cage <B> 3 </B> has a metal core 3a that is embedded in polyamide. At the guide points <B> 5 </B> the plastic is thinner than at other points on the metal core.
The plastic is injected around the core 3a with a precise shape, which means that the seamless plastic casing has the final shape of the cage after the injection.
The disk bearing <B> 10 </B> shown in FIGS. 5-7 consists of the cage <B> 11 </B> into which the balls 12 are pressed, as in the previous example will. The cage <B> 11 </B> has the metal core 14 embedded in the plastic <B> 13 </B>. The plastic is thinner at the guide points <B> 15 </B> than at other points on the metal core. The plastic <B> 13 </B> is molded around the core 14 with an accurate shape, which means that the finished molded plastic has the final shape of the cage.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK0033366 | 1957-11-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH372509A true CH372509A (en) | 1963-10-15 |
Family
ID=7219706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH6519758A CH372509A (en) | 1957-11-11 | 1958-10-20 | Plastic cage for roller bearings |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH372509A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3221733A1 (en) * | 1981-06-10 | 1983-01-05 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | ROLLER BEARING |
DE102011006031A1 (en) * | 2011-03-24 | 2012-09-27 | Aktiebolaget Skf | Segment for cage for roller bearing, comprises integral reinforcing element made of reinforcing material, and segment body, which is made of more than fifty volume percentage of injection-moldable plastic material |
DE102011006030A1 (en) * | 2011-03-24 | 2012-09-27 | Aktiebolaget Skf | Segment for rolling bearing cage i.e. plastic snatching cage, has connecting element extending along rotation direction for connecting segment with another segment, and retainer reversibly or irreversibly connected with connecting element |
WO2013160028A1 (en) * | 2012-04-27 | 2013-10-31 | Schaeffler Technologies AG & Co. KG | Window-type cage for an axial ball bearing |
EP2853766A3 (en) * | 2013-09-26 | 2016-08-10 | KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH | Ball ramp clutch on a drive spindle |
-
1958
- 1958-10-20 CH CH6519758A patent/CH372509A/en unknown
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3221733A1 (en) * | 1981-06-10 | 1983-01-05 | Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt | ROLLER BEARING |
DE102011006031A1 (en) * | 2011-03-24 | 2012-09-27 | Aktiebolaget Skf | Segment for cage for roller bearing, comprises integral reinforcing element made of reinforcing material, and segment body, which is made of more than fifty volume percentage of injection-moldable plastic material |
DE102011006030A1 (en) * | 2011-03-24 | 2012-09-27 | Aktiebolaget Skf | Segment for rolling bearing cage i.e. plastic snatching cage, has connecting element extending along rotation direction for connecting segment with another segment, and retainer reversibly or irreversibly connected with connecting element |
DE102011006031B4 (en) * | 2011-03-24 | 2013-04-18 | Aktiebolaget Skf | Segment for a roller bearing cage and method for its production |
DE102011006030B4 (en) * | 2011-03-24 | 2016-01-14 | Aktiebolaget Skf | Segment of a rolling bearing cage |
WO2013160028A1 (en) * | 2012-04-27 | 2013-10-31 | Schaeffler Technologies AG & Co. KG | Window-type cage for an axial ball bearing |
EP2853766A3 (en) * | 2013-09-26 | 2016-08-10 | KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH | Ball ramp clutch on a drive spindle |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE4311194C2 (en) | Sliding / rolling bearing | |
DE2422488A1 (en) | ROLLER BEARING WITH INSERTED TRACKS | |
DE3939438A1 (en) | KAEFIG FOR BALL BEARINGS | |
DE1066530B (en) | ||
DE4134604C2 (en) | Rolling bearings with noise damping | |
CH372509A (en) | Plastic cage for roller bearings | |
DE2155998B2 (en) | Mounting bush for inserting a piston embroidered with piston rings into a cylinder bore | |
DE1575608C3 (en) | Rolling bearings for longitudinal movements | |
DE2117018A1 (en) | Radial needle roller bearing outer ring | |
DE19602372C2 (en) | Roller bearings | |
DE10110915A1 (en) | Cage for a rolling bearing comprises a sheet metal carrier element which is provided on each side with plastic layers leaving a specified gap between them and the bearing running surfaces | |
DE2016321A1 (en) | Plastic plain bearings with improved heat transfer properties | |
DE1287382B (en) | Bushing for storing machine parts that move back and forth | |
DE1450051A1 (en) | Roller bearing | |
DE3607633C2 (en) | Recirculating ball bearings for longitudinal displacements | |
DE10030268A1 (en) | Cage for cylindrical roller bearing has endfaces of side rings with stud stumps able to expand axially | |
DE1675057C3 (en) | Method of manufacturing a ball bearing barrel and embodiments thereof | |
DE2139849A1 (en) | ROLLER BEARING IN LIGHTWEIGHT DESIGN | |
DE1955239U (en) | CAGE FOR ROLLER BEARING. | |
DE2612936C3 (en) | Ball bearings for longitudinal movements | |
DE6901053U (en) | ROLLER BEARING FOR SUPPORTING ROTATING COMPONENTS | |
DE102011004199A1 (en) | Radial roller bearing has annular lubricant reservoir that is formed in inner surface of outer ring with respect to fixed board or bottom faces of bearing needles | |
AT222440B (en) | ||
WO1999013233A1 (en) | Spherical joint capable of rotation in bearings | |
DE967539C (en) | Needle bearings for oscillating movements, e.g. Cardan pivot bearing with needles held and guided individually in a plastic cage |