GB2049070A - Bearings - Google Patents
Bearings Download PDFInfo
- Publication number
- GB2049070A GB2049070A GB7916776A GB7916776A GB2049070A GB 2049070 A GB2049070 A GB 2049070A GB 7916776 A GB7916776 A GB 7916776A GB 7916776 A GB7916776 A GB 7916776A GB 2049070 A GB2049070 A GB 2049070A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bearing
- cage
- lip
- balls
- races
- 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.)
- Granted
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
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7893—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a cage or integral therewith
-
- 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
- F16C33/3862—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together
- F16C33/3875—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together made from plastic, e.g. two injection moulded parts joined by a snap fit
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- 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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A ball bearing is provided with a cage 16 which, in addition to holding the balls in spaced relation, also includes integral sealing lips 20, 22 which sealingly engage the inner and outer races to prevent the ingress of foreign matter. There may be a single cage inserted from one side of the bearing and engaging all of the balls or two cages inserted from opposite sides and engaging respective sets of alternate balls. <IMAGE>
Description
SPECIFICATION
Bearings
This invention relates to bearings of the kind comprising an inner race, an outer race and a series of rolling elements (e.g. balls) located between the two and held in spaced relation by a cage.
The object of the invention is to provide a bearing of the kind referred to with improved sealing means for preventing ingress of foreign matter into the bearing. It is of course known to provide sealing arrangements for this purpose but as far as we are aware the seals have been assembled separately which increases costs and assembly time and sealing arrangements are therefore usually only adopted for precision bearings.
According to the present invention we provide a bearing of the kind referred to in which the cage is formed of a resiliently deformable material and includes an integral sealing lip along at least one of its inner and outer peripheral edges which sealingly engages with the inner or outer race respectively.
In one embodiment, the cage comprises an annulus from one side of which a series of integral tongues extend laterally to define ball-receiving openings and the other side of which is formed with said integral lip(s).
This type of cage is effective to seal only one side of the bearing and in many situations this is adequate because the bearing will for example be assembled in a recess or housing with said other side facing the base of the recess and hence effectively sealed thereby. However, it is within the scope of the invention to seal both sides of the bearing by providing a two-part cage, the two parts being assembled from opposite sides of the bearing and each having a sealing lip(s) for cooperation with the respective sides of the bearing races.
According to another aspect of the invention we provide a method of assembling a bearing of the kind referred to, in which the rolling elements are assembled to the bearing races and the cage is thereafter inserted from one side of the bearing into the gap between the races so as to engage with the rolling elements, the cage being of resiliently deformable material and having at least one sealing lip which, during said insertion step, makes sealing engagement with the inner or outer race of the bearing.
In a modification of this method where the cage is of two-part construction as aforementioned, the cage parts are inserted into the gap between the races from opposite sides of the bearing and the sealing lips thereof are brought into sealing engagement during the insertion step.
Thus, it will be seen that the present invention obviates the need for a separate sealing procedure because sealing is effected automatically during assembly of the cage or cage-parts to the bearing races.
Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings, in which:
Figure 1 is a diametral section through a bearing in accordance with the invention;
Figure 2 is an axial view taken in the direction 2 in Figure 1;
Figure 3 is a radial view of the cage of the bearing in Figure 1;
Figure 4 is an axial view of the cage;
Figure 5 is an enlarged fragmentary sectional view of the cage;
Figure 6 is a fragmentary diametral section of a modified bearing provided with cages inserted from each side thereof;
Figure 7 is a radial view of one of the cages of the bearing in Figure 6; and
Figure 8 is an axial view of the cage shown in
Figure 7.
Referring firstly to Figures 1 to 5, the bearing shown is one which requires sealing from one side only, for example in situations where the bearing is to be assembled in a recess or housing with the unsealed side facing the base of the recess or where the bearing is to be assembled alongside an identical bearing with the unsealed sides of the two bearings opposed. As shown, the bearing comprises inner and outer races 10, 12 formed with continuous ball receiving grooves for axial location of a piurality of balls 14 of which six are shown in the embodiment of Figures 1 to 5. The balls 14 are held in circumferentialiy spaced relationship by a cage 1 6 which is inserted from one side of the ball bearing, namely the righthand side as viewed in Figure 1.
The cage comprises a generally annular body portion provided, on one side thereof, with integral radially outwardly and inwardly projecting lips 20, 22 which taper towards their free ends and are truncated to form circular inside edges 24, 26. The inside faces 28 of the lips 20, 22 are of generally conical configuration whilst their outside faces 30 are substantially flat and co-planar.A number of integral tongues 32 project from the opposite side of the body 1 8 and form therebetween a number of ball receiving pockets 34 of part-circular configuration for snugly receiving the balls, the pockets 34 having open mouths 36 through which the balls enter during insertion of the cage between the races 1 0, 12. To facilitate entry of the balls into the pockets 34, the tongues 32 are recessed at their free ends to form flexible wall portions 38 in the vicinity of the mouths 36. The whole cage is conveniently manufactured from a resiliently deformable plastics material such as nylon so that the various portions thereof, including the lips 20, 22 are elastically deformable.
To assemble the bearing of Figures 1 to 5, the races and balls are first assembled together and the balls are spaced apart at approximately the correct spacing, the cage is then inserted (from the righthand side as seen in Figure 1) by pressing it into the gap between the races so that its tongues enter first and undergo deformation, particularly the wall portions 38, until the balls enter the pockets 34. When the cage has been inserted to this extent, the lips 20, 22 will make sealing engagement with the races. Thus, sealing is effected automatically upon insertion of the cage.
The arrangement is such that the sealing engagement between the lips 20, 22 and the races is substantially line contact so as to minimise frictional resistance between the cage and the races. To this end, the races 10, 12 are formed with rebates 40, 42 whose bases are of generally conical configuration but have apex angles which are smaller than those of the inside faces 28 of the lips 20, 22 so that only the inside edges 24, 26 of the lips 20, 22 make contact with the rebate bases.The axial spacing between the centres of curvature of the pockets 34 and the edges 24, 26 of the lips 20, 22 is such that, when the balls 14 are engaged in the pockets 34, the cage is located inwardly of the bearing to such an extent that the lips 20, 22 are deflected thereby increasing the sealing affect due to the tendency for the lips 20, 22 to return to their unstressed positions.
The embodiment of Figures 6 to 8 is generally the same, in principle, as that of Figures 1 to- 5 except that two cages are employed, the cages being identical and being inserted from opposite sides of the bearing. In this embodiment, each cage engages with only half of the balls of the bearing. In the embodiment of Figures 6 to 8, eight balls are employed with four being engaged by one cage at 900 intervals and the remaining four being engaged by the other cage also at 900 intervals. In Figures 6 to 8, the same reference numerals are used as in Figures 1 to 5 to identify like parts.
It will be noted that the tongues 32 of each cage define ball receiving pockets 34 and are grouped in pairs separated by gaps 50 so that the two cages can be interdigitated, i.e. with the tongues 32 of one cage located in the gaps 50 of the other cage.
The method of assembly of the bearing of
Figures 6 to 8 is substantially the same as for the bearing of Figures 1 to 5 except that two cages have to be inserted, one from either side. In all other respects, the bearing of Figures 6 to 8 is substantially the same as that of Figures 1 to 5.
Claims (10)
1. A bearing of the kind referred to in which the cage is formed of a resiliently deformable material and includes an integral sealing lip along at least one of its inner and outer peripheral edges which sealingly engages with the inner or outer race respectively.
2. A bearing as claimed in Claim 1 in which the cage is annular, said lip(s) being provided at one side of the annulus, and in which integral tongues of material project from the other side to form, between adjacent tongues, ball-receiving pockets of part-circular configuration whose mouths open at the side of the cage remote from the sealing lip(s).
3. A bearing as claimed in Claim 2 in which the
free ends of the tongues are received to afford
flexible wall portions in the vicinity of the mouths
of said ball-receiving pockets to facilitate entry of the balls into said pockets.
4. A bearing as claimed in Claim 2 or 3 in which
the or each sealing lip engages a surface on the
inner/outer races and in which the balls engage
snugly within said pockets in such a way that the
cage is located in a position wherein the lip(s)
is/are caused to undergo deflection by
engagement with said race surface(s).
5. A bearing as claimed in any one of Claims 4 in which the or each lip tapers in a radial
direction away from the body of the cage.
6. A bearing as claimed in Claim 5 in which the
radial extremity of the or each is truncated and in
which the arrangement is such that the inside edge of the lip makes substantially line contact with a surface of the respective race.
7. A bearing as claimed in Claim 5 or 6 in which the or each lip has an inside face of conical configuration and engages an outside face of the respective cage which is also of conical configuration, the apex angle of said lip face being greater than that of said cage face.
8. A bearing as claimed in any one of Claims
1-7 in which said cage engages alternate ones of said balls, the remaining balls being engaged by a second and identical cage inserted from the opposite side of the bearing, the two cages have interdigitated ball receiving pockets.
9. A method of assembling a bearing of the kind referred to, in which the rolling elements are assembled to the bearing races and the cage is thereafter inserted from one side of the bearing into the gap between the races so as to engage with the rolling elements, the cage being of resiliently deformable material and having at least one sealing lip which, during said insertion step, makes sealing engagement with the inner or outer race of the bearing.
10. A bearing substantially as hereinbefore described with reference to, and as shown in,
Figures 1-5 or Figures 6-8 of the accompanying drawings.
10. A modification of the method claimed in
Claim 9 in which there are two of said cages and in which each cage is inserted into the gap between the races from opposite sides of the bearing and the sealing lips thereof are brought into sealing engagement during the insertion step.
11. A method as claimed in Claim 9 in which the bearing is of the form claimed in any one of
Claims 1-8.
12. A bearing substantially as hereinbefore described with reference to, and as shown in,
Figures 1-5 or Figures 6-8 of the accompanying drawings.
13. A method of assembling a bearing substantially as hereinbefore described with reference to Figures 1-5 or Figures 6-8 of the accompanying drawings.
New claims or amendments to claims filed on 28 Aug 1979.
Superseded claims 1-13.
New or amended claims:
1. A bearing of the kind referred to in which the cage is formed of a resiliently deformable material and includes an integral sealing lip along at least one of its inner and outer peripheral edges which sealingly engages with the inner or outer race respectively, characterised in that the cage is so designed that it can be inserted from one side of the bearing between the races so as to engage with the balls and receive them within ballreceiving pockets thereof, the or each sealing lip engages a generally radially extending surface on the inner/outer races, the balls engage snugly within said pockets in such a way that the cage is located in a position wherein the lip(s) is/are caused to undergo deflection by engagement with said race surface(s), and the or each lip has a generally radially extending surface facing the respective generally radially extending surface of the inner/outer race, said facing surfaces being angularly inclined relative to one another such that they contact adjacent the peripheral edge(s) of the lip(s).
2. A bearing as claimed in Claim 1 in which the cage is annular, said lip(s) being provided at one side of the annulus, and in which integral tongues of material project from the other side to form, between adjacent tongues, ball-receiving pockets of part-circular configuration whose mouths open at the side of the cage remote from the sealing lip(s).
3. A bearing as claimed in Claim 2 in which the free ends of the tongues are recessed to afford flexible wall portions in the vicinity of the mouths of said ball-receiving pockets to facilitate entry of the balls into said pockets.
4. A bearing as claimed in any one of Claims 1-3 in which the or each lip tapers in a radial direction away from the body of the cage.
5. A bearing as claimed in Claim 4 in which the radial extremity of the or each is truncated and in which the arrangement is such that the inside edge of the lip makes substantially line contact with a surface of the respective race.
6. A bearing as claimed in Claim 4 or 5 in which the facing surfaces of the lip(s) and race(s) are of conical configuration, the apex angle of said conical lip surface being greater than that of said conical race surface.
7. A bearing as claimed in any one of Claims 6 in which said cage engages alternate ones of said balls, the remaining balls being engaged by a second and identical cage inserted from the opposite side of the bearing, the two cages having interdigitated ball receiving pockets.
8. A method of assembling a bearing of the kind referred to, in which the rolling elements are assembled to the bearing races and the cage is thereafter inserted from one side of the bearing into the gap between the races so as to engage with the rolling elements, the cage being of resiliently deformable material and having at least one sealing lip which, during said insertion step, makes sealing engagement with the inner or outer race of the bearing, the bearing is of the form claimed in any one of Claims 1-7.
9. A modification of the method claimed in
Claim 8 in which there are two of said cages and in which each cage is inserted into the gap between the races from opposite sides of the bearing and the sealing lips thereof are brought into sealing engagement during the insertion step.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7916776A GB2049070B (en) | 1979-05-14 | 1979-05-14 | Bearings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7916776A GB2049070B (en) | 1979-05-14 | 1979-05-14 | Bearings |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2049070A true GB2049070A (en) | 1980-12-17 |
GB2049070B GB2049070B (en) | 1982-12-15 |
Family
ID=10505153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7916776A Expired GB2049070B (en) | 1979-05-14 | 1979-05-14 | Bearings |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2049070B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4324444A (en) * | 1980-08-11 | 1982-04-13 | Trw Inc. | Snap-in bearing retainer and bearing |
FR2650353A1 (en) * | 1989-07-26 | 1991-02-01 | Skf France | Cage for a rolling-contact bearing, and bearing equipped with such a cage |
EP1010909A1 (en) * | 1998-12-18 | 2000-06-21 | Snr Roulements | Cage for ball bearings |
US6217223B1 (en) * | 1998-03-27 | 2001-04-17 | Skf Gmbh | Cage-mounted seal used in rolling bearings |
JP2010273461A (en) * | 2009-05-22 | 2010-12-02 | Panasonic Corp | Motor and generator |
DE102010033822A1 (en) | 2010-08-09 | 2011-08-04 | Schaeffler Technologies GmbH & Co. KG, 91074 | Bearing arrangement for use as wheel bearing for rotatably bearing mechanical component in relation to another mechanical component for supporting wheel of motor vehicle, has spacer including two portions formed in mechanical components |
US20140064649A1 (en) * | 2011-05-13 | 2014-03-06 | Shohei Fukama | Retainer for ball bearing, and ball bearing |
DE102012222799A1 (en) | 2012-12-11 | 2014-06-12 | Schaeffler Technologies Gmbh & Co. Kg | Two-piece bearing cage with retaining claws and ball bearings, comprising such a two-part bearing cage |
DE102012222800A1 (en) | 2012-12-11 | 2014-06-12 | Schaeffler Technologies Gmbh & Co. Kg | Two-piece bearing cage with holding shells and ball bearings, comprising such a two-part bearing cage |
-
1979
- 1979-05-14 GB GB7916776A patent/GB2049070B/en not_active Expired
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4324444A (en) * | 1980-08-11 | 1982-04-13 | Trw Inc. | Snap-in bearing retainer and bearing |
FR2650353A1 (en) * | 1989-07-26 | 1991-02-01 | Skf France | Cage for a rolling-contact bearing, and bearing equipped with such a cage |
US6217223B1 (en) * | 1998-03-27 | 2001-04-17 | Skf Gmbh | Cage-mounted seal used in rolling bearings |
EP1010909A1 (en) * | 1998-12-18 | 2000-06-21 | Snr Roulements | Cage for ball bearings |
FR2787530A1 (en) * | 1998-12-18 | 2000-06-23 | Roulements Soc Nouvelle | CAGE FOR BALL BEARING |
JP2010273461A (en) * | 2009-05-22 | 2010-12-02 | Panasonic Corp | Motor and generator |
DE102010033822A1 (en) | 2010-08-09 | 2011-08-04 | Schaeffler Technologies GmbH & Co. KG, 91074 | Bearing arrangement for use as wheel bearing for rotatably bearing mechanical component in relation to another mechanical component for supporting wheel of motor vehicle, has spacer including two portions formed in mechanical components |
US20140064649A1 (en) * | 2011-05-13 | 2014-03-06 | Shohei Fukama | Retainer for ball bearing, and ball bearing |
US9103374B2 (en) * | 2011-05-13 | 2015-08-11 | Ntn Corporation | Retainer for ball bearing, and ball bearing |
US9366292B2 (en) | 2011-05-13 | 2016-06-14 | Ntn Corporation | Retainer for ball bearing, and ball bearing |
DE102012222799A1 (en) | 2012-12-11 | 2014-06-12 | Schaeffler Technologies Gmbh & Co. Kg | Two-piece bearing cage with retaining claws and ball bearings, comprising such a two-part bearing cage |
DE102012222800A1 (en) | 2012-12-11 | 2014-06-12 | Schaeffler Technologies Gmbh & Co. Kg | Two-piece bearing cage with holding shells and ball bearings, comprising such a two-part bearing cage |
WO2014090238A1 (en) | 2012-12-11 | 2014-06-19 | Schaeffler Technologies AG & Co. KG | Two-part bearing cage comprising multiple lugs which form retaining claws, project outwards from two annular bodies into the interior and form free areas for lubricant, and ball bearing comprising a bearing cage of this type |
WO2014090237A1 (en) | 2012-12-11 | 2014-06-19 | Schaeffler Technologies AG & Co. KG | Two-part bearing cage comprising multiple lugs which form retaining shells, project outwards from two annular bodies into the interior and form free areas for lubricant, and ball bearing comprising a bearing cage of this type |
US9523388B2 (en) | 2012-12-11 | 2016-12-20 | Schaeffler Technologies AG & Co. KG | Two-part bearing cage comprising multiple lugs which form retaining claws, project outwards from two annular bodies into the interior and form free areas for lubricant, and ball bearing comprising a bearing cage of this type |
Also Published As
Publication number | Publication date |
---|---|
GB2049070B (en) | 1982-12-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |