EP2140154A2 - Blechkäfig für axialpendelrollenlager und verfahren zu dessen auslegung - Google Patents
Blechkäfig für axialpendelrollenlager und verfahren zu dessen auslegungInfo
- Publication number
- EP2140154A2 EP2140154A2 EP08748740A EP08748740A EP2140154A2 EP 2140154 A2 EP2140154 A2 EP 2140154A2 EP 08748740 A EP08748740 A EP 08748740A EP 08748740 A EP08748740 A EP 08748740A EP 2140154 A2 EP2140154 A2 EP 2140154A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet metal
- metal cage
- cage
- connecting webs
- window
- 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- Withdrawn
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
- F16C19/22—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
- F16C19/30—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 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
- F16C33/46—Cages for rollers or needles
- F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
- F16C33/541—Details of individual pockets, e.g. shape or roller retaining means
-
- 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
- F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
- F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
- F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
-
- 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
- F16C19/34—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 for both radial and axial load
- F16C19/36—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 for both radial and axial load with a single row of rollers
-
- 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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/06—Ball or roller bearings
- F16C23/08—Ball or roller bearings self-adjusting
- F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
- F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements
Definitions
- the invention relates to a sheet metal cage for a Axialpendelrollenlager or a cage pot as an intermediate for the sheet metal cage - hereinafter collectively referred to sheet metal cage - with a bottom ring, with a cover ring and with a plurality of connecting webs, which are each integrally connected to the bottom ring and the cover ring and windows Separate for receiving barrel rolls, and a method for designing the sheet metal cage.
- Axial pendulum roller bearings allow the absorption of high axial loads and in addition of radial forces and typically have contact angles of more than 20 degrees.
- axial spherical roller bearings make it possible to compensate angular errors by pivoting the bearing disks relative to one another with respect to their center axes.
- rolling elements come with axial pendulum bearings spherical barrel rollers used, which are usually formed asymmetrically. Due to the force absorption of the axial spherical roller bearings, the barrel rollers tend to tilt or restrict in operation.
- axial spherical roller bearings usually have cages with windows, the windows being separated from one another by webs.
- the webs have at sides facing in the direction of rotation guide surfaces for the barrel rollers, wherein the guide surfaces are often realized in osculation, so that the radius of curvature of the guide surfaces is slightly larger than the radius of curvature of the snuggling barrel roll.
- a sheet metal cage and / or a cage pot is proposed as an intermediate product for the sheet metal cage, both of which are collectively referred to below as a sheet metal cage.
- the sheet metal cage is suitable and / or designed and / or prepared for an axial spherical roller bearing.
- axial spherical roller bearings are preferably understood to mean roller bearings having a contact angle of greater than 20 °, in particular greater than 30 ° and in particular greater than 40 °.
- the sheet metal cage is preferably made of a steel material and comprises a bottom ring, a cover ring and a plurality of connecting webs, which are each connected in one piece with said rings, so that the sheet metal cage is integrally formed.
- the bottom ring and cover ring is defined so that the bottom ring has a smaller diameter than the cover ring.
- the radially outer upper sides of the connecting webs in the connecting direction between the bottom ring and cover ring are not curved and / or straight.
- the upper sides of the connecting webs are realized in such a way that they line up on a flat surface, the bearing line being aligned parallel to the connecting direction between the bottom ring and the cover ring.
- a circumferential lateral surface is formed by the sheet metal cage in the region of the windows and / or the connecting webs, which is formed frustoconical and / or conical.
- a truncated cone and / or cone is in particular assumed to be a straight circular truncated cone, wherein the generatrices of the circular truncated cone correspond to the support lines.
- the frustoconical surface assumes an angle between 30 ° and 60 °, preferably between 35 ° and 50 ° and in particular between 40 ° and 45 ° with respect to a central axis of the sheet metal cage.
- the invention is based on the consideration that the production is substantially facilitated by the sectional conical or frusto-conical or conical shape of the lateral surface of the sheet metal cage can.
- Current sheet metal cages are produced by first a pot is made by forming, in particular cold forming and in a second step, the windows are punched out.
- the product according to this manufacturing stage is referred to herein as a cage pot.
- the invention provides that the pot is formed in the region of the punched truncated cone, so that it can be placed in this area over its entire surface on a corresponding bearing surface.
- the cage or punching tool must be displaced with only a linear movement along the overlying surface line, but not positioned by a combined linear rotation movement.
- the sheet metal cage is made from a process sequence of forming and stamping.
- a pot is first made by forming technology, in which subsequently the windows are introduced by punching, so that the cage pot is formed.
- the sheet metal cage is designed to accommodate asymmetric barrel rolls.
- Asymmetrical barrel rollers have a uniform radius of curvature in a longitudinal section of the treads, but the center of curvature is not symmetrical about the free ends of the barrel rollers but is positioned asymmetrically.
- the barrel rolls each have a free end section with a larger diameter. ser and a free end portion formed with a smaller diameter.
- the sheet metal cage is preferably designed to receive the asymmetrical barrel rollers, that the window width is selected to be larger in the region of the cover ring, as in the region of the bottom ring.
- the connecting webs in each case on both sides in the direction of rotation and parallel to the connecting webs extending projections, which each provide a contact zone for the barrel rolls.
- this contact zone is arranged asymmetrically and in particular closer to the bottom ring than positioned to the cover ring.
- the contact zone is formed curved at least in the longitudinal direction of the connecting webs, wherein the radius of curvature is chosen so that the barrel rollers conform to the contact zones.
- the radius of curvature of the projections or the Kotaktzonen is selected to be greater than the applied radius of curvature of the rolling elements.
- the difference in the radii of curvature is preferably less than 10%, starting from the larger radius of curvature.
- the sheet metal cage is manufactured by a process sequence forming - stamping - embossing.
- the embossing process preferably forms the transition from the intermediate product cage pot to the end product sheet metal cage.
- Another object of the invention relates to a sheet metal cage, optionally according to the preamble of claim 1 or claim 1, optionally with any combination of the additional features in the dependent claims and / or in the description.
- this object of the invention relates to the sheet metal cage or to an intermediate product, which, however, preferably has no embossing on the connecting webs.
- the connecting webs on the longitudinal side on a release contour which is formed by a compound of at least three circular sections.
- the longitudinal side is defined as a corner-free longitudinal side, with any existing circular sections, which describe the transition from the transverse side of a window to the longitudinal side of the window, not counted.
- This next part of the invention is based on the consideration that the contact zones are usually insufficiently formed on the moldings, since not enough material is available when embossing the connecting webs.
- the usable contact zone for osculation is realized only over narrow areas along the connecting webs.
- the small extent of the contact zone can cause the barrel rollers start at an edge or the like when tilting or cabinets, so that the lubrication is reduced and / or the friction is increased.
- the claimed separation contour is used in the sheet-metal cage with the non-crimped connecting webs, since otherwise it can not be ruled out that the contact zones would be smaller than in the sheet-metal cages according to the prior art with a convex lateral surface in the region of the windows.
- the separating contour is undeformed in the case of the cage pot, in the case of the embossed sheet-metal cage the separating contour can be determined by embossing-in particular in the case of cages with a small diameter, e.g. be in the range of 100 mm - deformed, so that a sheet metal cage is within the scope of the invention, which is characterized in that it is made of a cage pot according to the invention.
- the at least three circular sections along the separating contour are arranged so that they merge tangentially into one another. This condition for the connection of the circular sections promotes u in the later embossed sheet metal cage. a. the minimization of points of application for shear forces.
- the connecting webs have exactly four of the circular sections on each side.
- This number of circular sections represents a preferred compromise between the adaptation of the projections and thus the contact zones and at the same time the complexity of the punching tool. It has been found that the shape and position of the Anformung with exactly four of the circular sections can be positioned and defined sufficiently accurate, so that this number is virtually an optimum for the cost / benefit ratio.
- the separating contour starting from the cover ring in the direction of the bottom ring is consecutively convex-concave-convex-concave.
- the width of a lubricant gap extending parallel to the connecting webs is set by the first convex circular section.
- the radii of curvature of the circular sections are preferably realized as follows:
- R1 1, 5 - 2.2 times the barrel roll length or the window length
- R2 0.3 - 0-8 times the barrel roll length or the window length
- the projections on the connecting webs are preferably designed as stamping strips, the stamping strips bearing the contact zones. These contact zones preferably extend over a range between 20% to 60% of the window length. It should be noted that this wide extension range of the contact zones is largely due to the selected release contour.
- the stamping bar preferably shows an end edge extending or extending parallel to the connecting web and which is arranged, at least in sections, in the region of the third circular section.
- the radius of curvature of the third circle section significantly defines the height or extent of the embossing strip or the contact zone.
- the sheet metal cage is designed by the following method.
- Another object of the invention relates to a method for the design of the sheet metal cage, wherein in a first step, a load-compatible contact zone is determined at the connecting webs of the cage. This contact zone is dependent on a plurality of parameters, such. As pressure angle, load design, geometric sizes, etc. determined.
- a separating contour on the connecting webs which is formed by at least three preferably exactly tangentially merging into each other circular sections, adapted by varying the radii of curvature and / or the centers of curvature of the circular sections, so that the modeled contact zone of the particular, load-sensitive contact zone corresponds or at least as far as possible.
- This adaptation can be done by any of the known methods such as a weighting function or an optimization function.
- one or the first circular section determines the width of the lubricant gap between barrel roller and connecting bar, one or the second circular section the height of the stamping bar in a starting area, one or the third circular section the height of the stamping bar in a central area and one or the fourth circular section the height of the stamping strip in one end area.
- Figure 1 is a three-dimensional, schematic representation of a sheet metal cage for a Axialpendelrollenlager as an embodiment of the invention
- Figure 2 is a schematic sectional view of the sheet metal cage in FIG.
- FIG. 3 shows a detailed detail in FIG. 1 in the same representation
- FIG. 4 shows a further schematic sectional view of the sheet metal cage in FIG. 1.
- the sheet-metal cage 1 is preferably roller-guided, the axial-spherical roller bearing has a pressure angle of more than 20 °.
- the sheet metal cage 1 is formed integrally and shows a bottom ring 2 and a cover ring 3, wherein the cover ring 3 coaxial, but offset in height to the bottom rings 2 is arranged and has a larger outer diameter.
- Bottom ring 2 and cover ring 3 are connected via connecting webs 4 mit- connected to each other, wherein the connecting webs 4 are aligned so that they intersect in imaginary extension with the central axis of the sheet metal cage 1.
- Between the connecting webs 4 windows 5 are arranged, which are designed to receive asymmetrical barrel rollers (not shown).
- the sheet metal cage 1 is manufactured by a sequence of processes, wherein in one step a pot is produced by forming, in a further step, the window 5 are punched or punched, so that a cage pot is formed, and in a further step, the connecting webs 4 are embossed, like this will be explained below.
- the lid ring 3 is formed as an axially extending, circumferential and closed sheet metal strip.
- the bottom ring 2 is designed as a radially oriented disc.
- the jacket region 6 is formed as a straight truncated cone, so that a connection and / or surface line between the cover ring 3 and bottom ring 2 is formed straight and / or unrestricted.
- Figure 2 shows the sheet metal cage 1 in a partially cut and rotated representation. From this illustration it can be seen that the sheet metal cage 1 rests linearly on a flat surface 7 in the jacket area 6. The support line is inclined at about 42 ° relative to the central axis of the sheet metal cage 1. Also can be seen in this view that the sheet metal cage 1 is angled exactly twice in cross-section. Due to the design of the jacket region 6, the sheet metal cage 1 can be positioned very precisely in a simple manner when punching or punching the window 5. Due to the straight support contour in the jacket region 6, the sheet metal cage 1 can be exactly aligned with a linear displacement movement along the arrow 8 in the axial direction. The outer contour lies on a hole on die (not shown), which has the same contour as the sheet metal cage 1. On the one hand, manufacturing costs are saved by the simplified alignment of the sheet metal cage 1, on the other hand, the perforated die is due to the simplified contour favorable in the production, so that in addition tooling costs can be saved.
- FIG. 3 shows the detailed detail A in FIG. 1, so that the windows 5 can be seen in enlargement.
- the windows 5 each have two transverse sides 9a, b and two longitudinal sides 10, wherein the bottom ring 2 associated transverse side 9a is narrower than the cover ring 3 associated transverse side 9b.
- the transition from the transverse sides 9 a, b to the longitudinal sides 10 takes place in the contour of the window 5 in each case via a corner curvature region 11.
- the windows 5 are separated from one another in the direction of rotation by the connecting webs 4. In the direction of the bottom ring 2 and the cover ring 3 is still an edge strip of the original shell portion 6 remains and separates the windows of the respective rings.
- the longitudinal sides 10 go after the Eckenkrümmungs Societyen 11 in a contour over which is formed by four circular sections R (1), R (2), R (3) and R (4), which are tangentially connected to each other or tangentially into each other.
- the circular sections are alternately curved so that a sequence starting from the ring section R (1) closest to the cover ring 3 results in a sequence of concave-convex-concave-convex relation to the associated window 5.
- the radii of the circular sections are coordinated as follows:
- the stamping strip 12 has an embossing surface 13 on the radially inside upper side, which comprises a curvature contour, at least in a contact zone 14, which exhibits a concave curvature in the longitudinal extension of the connecting webs 4, which is formed as an osculation for the barrel rolls to be used.
- the contact zone 14 ideally extends over a range of 20% to 60% of the window length, starting from the transverse side 9a.
- the embossing surface 14 has, in the radial direction, a boundary edge 15, which is aligned parallel or substantially parallel to the upper side of the connecting web 4 in the region of the contact zone 14.
- the advantage of this design is a very good tangential mating of the barrel roll, low touch point migrations in role skewing, such.
- the embossing bar 12 is formed in the direction of the cover ring 3 so expiring, so that formed between the later used barrel roller and the connecting web 4, a gap for the supply of lubricant to the roller board contact becomes.
- the contour of the longitudinal side 10 and the formation of the embossing bar 12 and optionally the lubricant gap are coupled together by the embossing process such that the contour of the longitudinal side 10, the formation of the embossing bar 12 controllable or at least selectively influenced.
- the radii of the circular sections R (1), R (2), R (3) and R (4) or their centers to be defined so that in the region of the contact zone 14, the parallel to the outer contour extending boundary 15 of the guide surface 13 results.
- the contact zone 14 is arranged in the region of the circular section R (3).
- the contour of the lubricant gap is significantly described and / or determined by the radii of the circular sections R (1) and R (2).
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007017678A DE102007017678A1 (de) | 2007-04-14 | 2007-04-14 | Blechkäfig oder Käfigtopf für ein Axialpendelrollenlager und Verfahren zu dessen Auslegung |
| PCT/DE2008/000606 WO2008125088A2 (de) | 2007-04-14 | 2008-04-09 | Blechkäfig für axialpendelrollenlager und verfahren zu dessen auslegung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2140154A2 true EP2140154A2 (de) | 2010-01-06 |
Family
ID=39691143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08748740A Withdrawn EP2140154A2 (de) | 2007-04-14 | 2008-04-09 | Blechkäfig für axialpendelrollenlager und verfahren zu dessen auslegung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2140154A2 (de) |
| DE (1) | DE102007017678A1 (de) |
| WO (1) | WO2008125088A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017109046B3 (de) | 2017-04-27 | 2018-05-09 | Schaeffler Technologies AG & Co. KG | Einrichtung zur Niveauverstellung für ein Kraftfahrzeug |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1045185B (de) * | 1957-01-07 | 1958-11-27 | Skf Svenska Kullagerfab Ab | Kaefig fuer Axialrollenlager |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD17746A (de) * | ||||
| US1585690A (en) * | 1918-10-22 | 1926-05-25 | Skf Svenska Kullagerfab Ab | Roller bearing |
| US1862641A (en) * | 1930-08-01 | 1932-06-14 | Timken Roller Bearing Co | Roller bearing |
| DE826387C (de) * | 1948-10-13 | 1952-01-03 | Skf Svenska Kullagerfab Ab | Rollenkaefig aus gepresstem Blech |
| NL78409C (de) * | 1949-02-07 | 1900-01-01 | ||
| FR1470088A (fr) * | 1967-04-21 | 1967-02-17 | Torrington Mfg Co | Procédé de fabrication de cages pour roulements |
| SE361924B (de) * | 1972-04-12 | 1973-11-19 | Skf Nv | |
| US3940193A (en) * | 1973-05-03 | 1976-02-24 | General Motors Corporation | Roller bearing separator |
| JP3477835B2 (ja) * | 1993-10-12 | 2003-12-10 | 日本精工株式会社 | 保持器付自動調心ころ軸受 |
| JPH11336766A (ja) * | 1998-05-21 | 1999-12-07 | Nippon Seiko Kk | ころ軸受用保持器 |
| DE10217463B4 (de) * | 2002-04-19 | 2011-02-03 | Schaeffler Technologies Gmbh & Co. Kg | Wälzlagerkäfig für zylindrische Wälzkörper, insbesondere Nadelkäfig |
| JP2005147364A (ja) * | 2003-11-19 | 2005-06-09 | Nakanishi Metal Works Co Ltd | ころ軸受用保持器及びその製造方法 |
| JP2007092766A (ja) * | 2005-09-27 | 2007-04-12 | Nakanishi Metal Works Co Ltd | ころ軸受用保持器およびその製造方法 |
-
2007
- 2007-04-14 DE DE102007017678A patent/DE102007017678A1/de not_active Ceased
-
2008
- 2008-04-09 WO PCT/DE2008/000606 patent/WO2008125088A2/de not_active Ceased
- 2008-04-09 EP EP08748740A patent/EP2140154A2/de not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1045185B (de) * | 1957-01-07 | 1958-11-27 | Skf Svenska Kullagerfab Ab | Kaefig fuer Axialrollenlager |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007017678A1 (de) | 2008-10-16 |
| WO2008125088A2 (de) | 2008-10-23 |
| WO2008125088A3 (de) | 2009-04-30 |
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Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG |
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| 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 |
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