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
  • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
  • F16C33/4664—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages with more than three parts, e.g. two end rings connected by individual stays
• • 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
  • F16C33/548—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal with more than three parts, e.g. two end rings connected by a plurality of stays or pins
• • 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
  • F16C33/56—Selection of substances
  • F16C33/565—Coatings
• • 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
  • F16C43/00—Assembling bearings
  • F16C43/04—Assembling rolling-contact bearings
  • F16C43/06—Placing rolling bodies in cages or bearings
  • F16C43/065—Placing rolling bodies in cages or bearings in 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
  • F16C19/24—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 radial load mainly

Definitions

• the invention relates to a roller bearing cage according to the preamble of claim 1.
• Rolling bearing cages are known from the prior art, which are made of brass by milling. Such cages are heavy, expensive and the production is associated with a high rejection due to the milled brass particles.
• rolling bearing cages are known, which are made of a first ring, a second ring and web members, wherein the web elements connect the first ring with the second ring, and wherein adjacent web elements form a pocket in which a rolling element is accommodated.
• DE 1 062 502 B describes a roller bearing cage having a first ring, a second ring and three web elements connecting the second ring to the first ring. The three web elements are arranged at a distance of 60 ° from each other along the circumference of the two cage rings, wherein between adjacent web elements in each case five cylindrical rolling elements are arranged. Each of the rolling elements is secured by a pin connection to the cage ring.
• the web elements are designed as Flachacheenzuitese with a rectangular, one-sided open profile cross-section.
• DE 821 447 B describes a roller bearing cage with a first ring and a second ring, which are interconnected by four web elements.
• the web elements are designed as flat ice blanks with round or square cross-sectional profile. Between adjacent web elements five cylindrical rolling elements are arranged, each of which is received on the front side of the two cage rings.
• DE 934 373 B describes a roller bearing cage with a first ring and a second ring.
• the first ring and the second ring are connected by cylindrical web elements of a rivetable and thus soft material.
• the web elements have a round cross section. Adjacent web elements form a pocket, each of which receives a rolling element.
• Each web element defines a U-shaped spacer element on the first or second ring, wherein the legs of the U engage in the pocket and guide the rolling bodies located in the pocket or keep them spaced from the web element.
• a disadvantage here is that the rolling element abuts the end sections of the U in a grinding manner. Unfavorable is further that the web element consists of a rivet and therefore soft material, so that the rolling bearing cage is overall less stable.
• the wire forms as a substantially linear connection between the two cage rings a possibly unstable composite, wherein the rolling bearing cage is particularly susceptible to torsion, in which the first ring is rotated relative to the second ring. Unfavorable is further that along the contact surfaces, a linear contact between the rolling elements and the web elements occurs, which causes high wear.
• DE 6945329 describes a roller bearing cage, which comprises a first ring and a second ring, which are interconnected by clip-like web elements, wherein adjacent web elements form a pocket for receiving a rolling element.
• the web elements are designed as closed blanks made of spring steel, which are open in the middle.
• the web elements are placed around the two end faces and outer surfaces of each of the two cage rings, so that an upper and a lower web portion is formed as a substantially linear connection of the two cage rings, which represents the one-sided boundary of the bag.
• Such a roller bearing cage is expensive to manufacture and due to the resilient properties and the only linear connection between see the two cage rings little stable.
• DE 30 02 689 A1 describes a roller bearing cage with a first ring and a second ring, wherein web elements are provided, which connect the two cage rings with each other, wherein adjacent web elements together form a pocket into which a rolling element is received.
• the web elements are formed as flat material blanks, which are arranged via a point contact on the respective cage ring.
• the Flat material blanks are mounted on the cage rings with respect to the axis of the roller bearing cage such that the axis of the rolling bearing cage is arranged substantially perpendicular to the respective flat material blanks.
• a line-like contact with the rolling elements forms, so that an increased friction along these edges occurs.
• Unfavorable is further that the thin flat material blanks in the described arrangement against a rotation of the two cage rings relative to each other the rolling bearing cage offer only a low overall stability.
• the two-part design of the web element by a surface element and a fixing element allows a simplified insertion of the rolling elements in the Wälz stresseskorfig such that first the rolling elements is introduced into the space bounded by the surface element pocket space and then prevented from falling out of the pocket space by the insertion of the fixing element, wherein the fixing element is dimensioned such that it fills the area between adjacent rolling elements so far that the rolling elements can no longer fall out in the insertion direction. Due to the planar design of the surface element of the roller bearing cage receives increased stability even in the event that the surface element is formed only thin and made of a soft material such as sheet metal.
• planar design of the surface element further allows the provision of recesses into which further elements with a special function, such as wear elements, can be inserted. Since the surface element has a long peripheral edge, it is possible to fix the surface element along sections of the peripheral edge essentially linearly at the two cage rings, wherein the linear fixing, for example in the form of a line welding, significantly increases the strength and stability of the rolling bearing cage as a whole causes as a pointy determination just like a spot weld.
• the surface element at the end faces of at least one of the two cage rings along a joint line can be fixed.
• the fixing can be done by a weld or gluing, which is then designed as a line welding or line gluing and gives both the connection of the surface element to the cage ring as well as the Wälzla- gerhimfig total increased stability compared to a spot welding or NOTEkle-.
• Between the end faces of the cage ring may have a slot through which the flat surface element is inserted during assembly of the rolling bearing cage.
• the surface element has at least one recess into which a wear element can be inserted. This takes into account the fact that wear between the Rolling element and formed by the surface element portion of the wall of the pockets occurs only at individual points, so that it is sufficient to provide the wear element only at these points. In the area of the wearing element, a reduced friction occurs between the web element and the rolling element. It is particularly possible to produce the surface element of a wear-prone material and the wear element of a material subject to less wear.
• the wear element has a circumferential groove into which the edge of the recess of the surface element is insertable, so that the wear element is easy to install.
• the wear element is designed as a substantially bow-shaped clip which can be mounted in the recess in the surface element or on the surface of the surface element.
• the wear element is designed to be multi-layered. If the wear element is designed as a bow-shaped clip with a substantially U-shaped or V-shaped cross section, the two limbs of the U and V form two layers of the wear element. If the wearing element is formed by three flat layers of a material which are fastened to one another, the middle of the three layers can protrude beyond the outer layers or jump back, so that an edge is formed which can be inserted into an associated groove in the surface element in that a groove is formed into which an edge formed on the surface element can be inserted.
• the outer, with the rolling elements in contact surfaces a Verschl encompassmindemde surface, wherein the wear-reducing surface by an additional coating of the corresponding position of the wear element or by a suitable material for the corresponding position of the Wear element shown is.
• the abovementioned layers can be subelements, which in turn are produced as blanks made of sheet metal, brass or Teflon or another material and are attached to one another, for example by means of spot welding.
• the wear element may extend substantially in the plane defined by the surface element and be formed substantially rectangular in plan view. Alternatively, it may be provided that the wear element has a portion which is offset from the plane defined by the surface element.
• the wear element in this case is substantially L-shaped in plan view.
• the parked section can rest, for example, on an inner side of the pocket of one of the two cage rings and thereby reinforce the mechanically highly stressed corner formed by the web element with the body of the cage ring or surface. It is further understood that the wear element in a top view can also look T-shaped, with two cut-off sections facing away from each other in the circumferential direction.
• At least one of the two cage rings has a C-shaped or unilaterally open rectangular cross-section in the radial direction.
• the cross-sectional profile gives the cage ring and thus the rolling bearing cage overall high mechanical stability.
• the end faces of the C-shaped or rectangular cross-section provide the opportunity to connect the surface element along a long joint line to the body of the cage ring.
• the surface element has parked facing sections in the circumferential direction.
• the surface element has a substantially Y-shaped cross-section, wherein the arms of the Y point in the circumferential direction.
• the offset sections, especially the arms of the Y additionally stabilize the surface element against torsion, making it possible to produce the surface element from a particularly thin and relatively soft material. and to obtain a rolling bearing cage of high torsional strength.
• the surface element has holding tongues which prevent the rolling elements from falling out against the insertion direction when the roller bearing cage with rolling bodies is fitted for the first time.
• the retaining tongues may be formed on the parked portion of the surface element, for example, as in the parked section cut or milled free tongues.
• the surface element is produced from a sheet metal blank.
• the surface element is thus produced from an inexpensive material, for example, by the formation of suitable blanks, wherein the blanks can be joined together when needed to form the surface element.
• the high stability of the roller bearing cage receives by the surface element by its planar configuration, the mechanical stability of the surface element itself can be supported in particular by the formation of parked sections.
• At least one of the two cage rings is formed from a sheet metal blank; in this sheet metal blank slots may be inserted, for example by punching, through which the surface elements are guided during assembly of the rolling bearing cage.
• the optionally provided with slots sheet metal blank then forms one of the two cage rings.
• the fixing element can be fixed at its ends by caulking to the cage rings.
• the fixing element may be formed from a sheet metal blank and does not necessarily have a flat extension.
• the fixing element may have at its end portions a slit which forms two sections, wherein each of the two sections in the mounting position of the fixing bent over and placed on the outer sides of the cage rings to set the introduced in a bore of the cage rings fixing on the two cage rings.
• the fixing element in addition to the function of filling a space in the interstices between the rolling elements, can also serve to hold a wear element in the recess in the surface element and additionally fix the surface element to the cage rings.
• an exemplary embodiment of a roller bearing cage can be obtained in a simple manner by providing the cage rings as annular blanks from the sheet metal sheet such that the surface elements and fixing elements are also provided as blanks from the sheet metal sheet, that in the blanks for the cage rings, for example, by punching slots are made and the slotted blanks for the cage rings are caulked edge if necessary, so that the cage rings have a C-shaped or unilaterally open rectangular cross-sectional profile.
• recesses are also provided, for example, by punching; furthermore, uncovered sections are produced, for example, by bending. In the parked sections each two retaining tongues are milled.
• the surface element is guided through the slots in the cage rings and attached to the cage rings, for example by a line welding.
• the wear elements are introduced, wherein the wear elements are again formed in three-lilac and are formed from blanks assembled from the Tafelblech.
• the wearing elements have a wear-reducing surface on the surface facing the rolling element, for example by coating one of the blanks for the purpose of producing a wear-resistant surface. Wear element with Teflon.
• the fixing elements are introduced, which hold the wear elements in the recesses in the surface elements. The fixing elements are held, for example by bending their end portions of the cage rings.
• a rolling bearing cage can be produced in a simple manner only by providing suitable blanks and by forming recesses, for example by means of stamping, which exhibits high mechanical stability and only low friction in the area of the wear elements. It goes without saying that materials other than sheet metal can also be provided.
• the assembly of the roller bearing cage with the rolling elements simplified such that after mounting the surface elements on the cage rings, the rolling elements are introduced and secured against falling out against the insertion direction by the retaining tabs on the surface elements. Against falling out in the insertion direction, the rolling elements are secured by the introduction of the fixing elements, which fill the space between adjacent rolling elements.
• FIG. 1 shows a perspective view and a plan view of an embodiment of a cage ring of a Wälzla- gerhimfigs invention
• FIG. 2 shows a perspective view of a surface element of the roller bearing cage from FIG. 1, FIG.
• FIG. 3 shows a perspective view and a plan view of a wear element of the roller bearing cage of FIGS. 1 and 2,
• Fig. 4 shows a perspective view and a plan view of the rolling bearing cage of FIG. 1 to 3 during assembly
• FIG. 5 shows in four different views an alternative to the wear element of FIG. 3.
• Fig. 1 shows in the left part of a perspective view and in the right part of a plan view of a cage ring 1, the body 6 is formed as a substantially annular disc of a sheet metal blank.
• slots 2 are arranged, which were produced by means of stamping.
• the slots 2 have a radially extending longitudinal section 3 and two angled sections 4, so that essentially in Y-shaped profile can be seen.
• the slots 2 have a radially extending longitudinal section 3 and two angled sections 4, so that essentially in Y-shaped profile can be seen.
• five indentations 5 can be seen; In these recesses 5 accumulates during operation of the rolling bearing cage lubricant which, as soon as a lack of lubricant should occur, the missing lubricant in the raceways of the rolling elements compensates in the short term.
• a stamping 6 directed perpendicularly to the image plane is provided, so that the cage ring 1 has a substantially C-shaped or unilaterally open rectangular profile in cross-section.
• the rolling bearing cage has two cage rings, each of which is like the cage ring 1 of FIG. 1 is formed.
• Fig. 2 shows a surface element 8, which is formed in three parts and comprises two identically designed outer sub-elements 9 and a central sub-element 10.
• the two outer sub-elements 9 are joined to the central sub-element 10 by means of spot welding to form a solid composite.
• the surface element 8 has two recesses 11.
• the respective recess 11 is formed by the superposition of the two outer sub-elements 9 and the middle sub-element 10, which in each case have recesses, wherein the recess 12 of the central sub-element 10 with respect to the recess 13 of the outer sub-element 9 has an undersize, so that in Region of the recess 11, a recess 11 surrounding the edge 14 is formed, in which a provided with a corresponding groove further element can be introduced.
• the middle sub-element 10 has a greater axial extent than the outer sub-element 9, so that a lower edge 15 of the respective outer sub-element 9, although parallel to a lower edge 16 of the central sub-element 10, but axially offset, whereby the surface element 8 axially is completed by the lower edge 16 of the central sub-element 10.
• the lower edge 16 is formed in the manner of a chamfer, which can be inserted into an associated guide groove of a further element in order to guide and fix the surface element 8.
• the two outer sub-elements 9 each have parked portions 17 which extend along the entire radial extent of the surface element 8.
• the viewing direction is directed substantially perpendicular to the parked portion, so that only one end face 18 can be seen.
• the two parked in the circumferential direction sections 17 are away from each other and are formed along a crease line 36 at which the axial extent of the central sub-element 10 ends.
• two retaining tongues 19 are arranged by milling each.
• the surface element 8 shows due to the parked sections 17 has a substantially Y-shaped profile.
• the dimensioning of the surface element 8 is made in view of the recognizable in Fig. 1 slots 2 in the two cage rings 1 so that the surface element 8 through the slots 2 of both cage rings 1 is inserted, especially so that the two parked sections 17 in the angled portions 4 of the slots 2 are received in the body 6 of the cage ring 1.
• the surface element 8 in particular does not completely fill the longitudinal section 3 of the slots 2, so that at one end of the longitudinal section 3 a further part, namely the fixing element 26 described below, is introduced into the slot 2 in addition to the surface element 8 can.
• the surface elements 8 are introduced with the Y-shaped cross section in the slots 2 shown in FIG. 1, the surface elements 8 extend in the radial direction such that an axis 35 of the rolling bearing cage in a plane defined by the surface element 8, at least in a ge - thought extension of the plane, is arranged. In a plan view along the axis 35 thereby an imaginary extension of the surface elements 8 intersects substantially in the axis 35 of the cage rings 1 and der Wälzlager tanninfigs.
• FIG. 3 shows a wear element 20, which consists of three substantially square sub-elements, namely of two outer sub-elements 21 and a central sub-element 22.
• the outer sub-elements 21 have over the middle sub-element 22 an excess, so that a circumferential groove 23rd is trained.
• the peripheral groove 23 is formed with respect to the recess 11 of the surface element 8 such that the wear element 20 can be inserted into the recess 11 by means of the groove 23 and the edge 14 and then substantially flush with the lower edge 16 of the surface element 8 ,
• the sub-elements 21, 22 of the wear element 20 are formed as square blanks of sheet metal, wherein the wear element 20 is produced by joining the sub-elements 21 and 22 together.
• the rolling elements facing surface 24 of the outer sub-elements 21 of the wear element 20 is designed to reduce wear in terms of the material of the rolling elements and has a coating of Teflon. It is understood that the outer sub-elements 21 of the wear element can also be made entirely of Teflon or other wear-reduced material such as brass.
• Fig. 4 shows in the upper part of a plan view of the rolling bearing cage, wherein one of the two cage rings is omitted.
• the lower part of Fig. 4 shows a perspective view of the rolling bearing cage during filling with cylindrical rolling elements 25th 4 shows a fixing element 26, which has an approximately T-shaped cross section in plan view.
• the fixing element 26 has a radial section 27, the extent of which is dimensioned such that the radial section 27 engages in the groove 23 of the wear element 20.
• the fixing element 26 further has a horizontal portion 28, the extent of which is dimensioned such that the horizontal portion 28 fills the space between two adjacent rolling elements 25.
• the fixing member 26 has portions 29, which in the end position laterally, in the circumferential direction of the body 6 of the cage ring 1, can be caulked, so that the fixing element 26 can be fixed to the cage ring 1.
• the assembly of the rolling bearing cage or the filling of the roller bearing cage during assembly is done such that first two surface elements 8 are inserted into adjacent slots 2 of both the first and the second cage ring 1 and form a pocket for the rolling elements 25.
• the surface elements 8 are defined in the slots 2 in the body 6 of the cage ring 1 or on the parked stampings 7, for example by means of a line welding.
• the rolling element 25 is inserted into the pocket and prevented by folding the retaining tabs 19 at the parked portions 17 of the surface elements 8 against falling out against the insertion direction.
• the roller bearing cage is rotated by approximately 180 °, wherein the retaining tongues 19 hold the rolling elements 25.
• the wear elements 20 are inserted and engage with the edge 23 in the edge 14 of the recess 11 of the spring element 8.
• the fixing member 26 is inserted, the radial portion 27 engages the edge 23 of the wear member 20 and the horizontal portion 28 between the space Fills adjacent rolling elements 25 so far that the rolling elements 25 can not escape without displacing the fixing element 26 against the insertion of the bag.
• the fixing element 29 is then bent by bending the sections 29 at the ends on the body 6 of the respective cage ring 1 set.
• the fixing element 26 forms with the interposition of the wear element 20 with the surface element of a web element, which connects the two cage rings 1 together.
• the fixing element 26 may in turn consist of two sub-elements, which are joined together except for the end portions, wherein the non-joined end portions are caulked in the opposite direction.
• Fig. 5 shows an alternative embodiment of the fixing element 26, which is designed in the manner of a clip 30 and has a substantially U-shaped cross-section.
• the two legs 31 are fastened together by means of an insertion tongue 32 in an opening 33, wherein the legs 31 of the clip 30 approach, the bottom 34 of the clip 30 but remains spaced.
• the distance of the two legs 31 in the region of the bottom 34 may be sufficient to fill the gap between adjacent rolling elements, so that the clip 30 takes over the function of the fixing element 26.
• the outwardly facing sides 37 of the legs 31 of the clip 30 may have a wear-reducing coating, or the clip 30 itself or at least its legs 31 may be made of a wear-reducing material. In this case, the clip 30 or more generally the fixing takes over the function of the wear element.
• the wear element 14 extends substantially in the plane defined by the surface element 8 level. It is understood that the wear element may additionally have at least one portion which is offset from the plane defined by the surface element, so that the wear element has a substantially L-shaped profile, wherein the parked portion on one side of the body 6 of the cage ring 1 in sections. It is further understood that two wear elements each having an L-shaped cross section can be joined to form a single wear element with a T-shaped cross section, the section of the wear element corresponding to the vertical section of the T being arranged in the region of the surface element 8.
• the web element was formed by a composite consisting of the fixing element 26, the wear element 20 and the surface element 8. It is understood that the web element does not necessarily have to include a wear element. It is further understood that the web element does not necessarily require that the surface element 8 is in contact with the fixing element 26.
• the web element may be formed by two spatially separated elements, namely the surface element and the fixing element.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Rolling Contact Bearings (AREA)

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Applications Claiming Priority (2)

Publications (2)

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Citations (4)

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• 2008
  • 2008-01-17 DE DE102008004779A patent/DE102008004779A1/de not_active Withdrawn
• 2009
  • 2009-01-13 WO PCT/DE2009/000026 patent/WO2009089819A1/de active Application Filing
  • 2009-01-13 CN CN2009801026468A patent/CN101970891A/zh active Pending

Patent Citations (4)

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