GB1604570A - Production and assembly of rolling element bearings - Google Patents

Production and assembly of rolling element bearings Download PDF

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Publication number
GB1604570A
GB1604570A GB26012/78A GB2601278A GB1604570A GB 1604570 A GB1604570 A GB 1604570A GB 26012/78 A GB26012/78 A GB 26012/78A GB 2601278 A GB2601278 A GB 2601278A GB 1604570 A GB1604570 A GB 1604570A
Authority
GB
United Kingdom
Prior art keywords
cage
bearing
ring
apertures
strip
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.)
Expired
Application number
GB26012/78A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pilgrim House Group Ltd
Original Assignee
Ransome Hoffmann Pollard Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ransome Hoffmann Pollard Ltd filed Critical Ransome Hoffmann Pollard Ltd
Priority to GB26012/78A priority Critical patent/GB1604570A/en
Publication of GB1604570A publication Critical patent/GB1604570A/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
    • B21D53/12—Making other particular articles parts of bearings; sleeves; valve seats or the like cages for bearings
    • 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
    • F16C19/24—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
    • F16C19/26—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 with a single row of rollers

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

Description

(54) IMPROVEMENTS IN THE PRODUCTION AND ASSEMBLY OF ROLLING ELEMENT BEARINGS (71) We, RANSOME HOFFMANN POLLARD LIMITED, a British Company of New Street, Chelmsford, Essex, CMl lPU, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to a method of producing a cage for a rolling element bearing and to a method of assembling a rolling element bearing incorporating such a cage.
In one aspect the invention provides a method of producing a cage for a rolling element bearing which comprises treating strip material to form apertures spaced apart along the strip to receive the rolling elements of the bearing into which the cage is incorporated and spaced openings at one side of the strip which communicate with at least some of the apertures, forming the treated strip material into a ring and impart ing a frusto-conical profile to the ring.
A method of producing a cage for a cylindrical rolling element bearing may comprise treating strip metal material to form apertures spaced apart along the strip to receive the rolling elements of the bear ing into which the cage is incorporated and openings at one side of the strip which are spaced to communicate with alternate aper tures to provide a castellated profile to the strip material, forming the treated strip material into a ring and joining the ends of the strip together and imparting a frusto conical profile to the ring to facilitate the subsequent assembly in the bearing.
The strip material can be soft mild steel and the apertures and openings can be produced by punching. Each aperture can be defined by continuous side margins at the sides of the strip material and by cross pieces extending transversely of the strip material between these side margins. The openings can then be formed by cutting away spaced portions of one of the side margins to form a castellated band. It is possible to form the apertures and openings simultaneously in one operation although these steps can be performed successively.
The closed apertures locate the cage axially on the rolling elements.
It is preferable at some stage to shape the cross-pieces to provide a tapered end region directed outwardly from the strip material.
During the formation of the ring the free ends of the strip material can be bonded together as by welding. Depending on whether the cage is to be assembled to the inner or outer race of the bearing, the cross-pieces can be bent or deformed radially inwardly or outwardly of the ring in imparting the frusto-conical Profile thereto.
The present invention also provides a method of assembling a rolling element bearing which employs as a cage a preshaped frusto-conical ring with the aforesaid apertures and openings at one side; wherein the ring is assembled to the inner or outer race of the bearing and to the rolling elements thereof, which are engaged with the track of said inner or outer race, and the regular shape of the ring is then restored.
Subsequent to the restoration of the ring, the other race of the bearing is assembled.
The regular shape of the ring is preferably restored by bending the previously bent cross pieces back into axial parallelism.
The invention may be understood more readily and various other features of the invention may become apparent from consideration of the following description.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, wherein: Figures 1 to 7 represent successive stages in making a cage for use with a roller bearing and in accordance with the inven tion, and Figures 8 to 10 depict the stages involved in assembling a roller bearing employing the cage.
As shown in Figure 1, a strip of metal, more particularly soft mild steel, is initially formed with a series of spaced rectangular apertures 11 which are conveniently punched into the strip. The resulting ladder-like band 10 has continuous side margins 12 adjoined by regular cross-pieces 13. In the next operation depicted in Figures 2 and 3 on a somewhat larger scale, the cross-pieces 13 are relieved and provided with tapered upper end regions 14, for example, by use of a coining tool 15. Thereafter, as depicted in Figures 4 and 5 the margin 12a at one side of the band 10 is cut away at alternate apertures 11 to form openings 20 at that side 12a.
The portions cut-away conveniently by punching, may extend completely between the cross-pieces 13 of the associated openings 11 as shown in Figure 4 with the dimension 'S' of the openings 20 corresponding to that of the apertures 11.
Alternatively the cut-away portions may extend only partly between the cross-pieces 13 to leave residual projections 12' as shown in Figure 5.
The resultant castellated band shown in Figure 4 or 5 is next rolled into a closed ring to thereby form the cage 10' and the free ends of the band are joined as by welding.
The tapered regions 14 are now either at the outside or inside of the cage 10' depending on the desired function of the cage 10' in the bearing, i.e., whether the cage 10' is assembled to the inner or outer ring of the roller bearing.
After the formation of the basic ring, the cage 10' overall is given a frusto-conical side profile by bending the cross pieces 13 radially outwardly or inwardly from the continuous margin 12 as shown in Figures 6 and 7, respectively. The cage 10' shown in Figure 6 is used where the rollers of the bearing are to be retained on the inner race of the bearing while the cage 10' shown in Figure 7 is used where the rollers of the bearing are to be retained on the outer race of the bearing.
During the subsequent assembly of the bearing, the rollers 17 are inserted into the track or raceway of the inne race 18 of the bearing as shown in Figure 8 or of the outer race 19 of the bearing as shown in Figure 9.
The pre-shaped cage 10 of Figure 6 or 7 is next placed with its closed apertures 11 over the rollers 17 as shown in Figure 8 or 9, respectively. The cross-pieces 13 are then bent back into parallelism to restore the normal regular nng shape to the cage 10'.
The final restored shape of the cage 10' is depicted in Figure 10 which corresponds to the bearing represented in Figure 9. Finally the inner (Figure 9, 10) or the outer race (Figure 8) is fitted.
During assembly, it is also possible to load the rollers into the pre-shaped cage 10' shown in Figure 6 or Figure 7 then to fit the rollers 17 into the raceway together with the cage 10' and finally to deform the cross pieces 13 back to their original position to retain the rollers 17 as before.
WHAT WE CLAIM IS: 1. A method of producing a cage for a rolling element bearing; said method comprising treating strip material to form apertures spaced apart along the strip to receive the rolling elements of the bearing into which the cage is incorporated and spaced openings at one side of the strip which communicate with at least some of the apertures, forming the treated strip material into a ring and imparting a frusto-conical profile to the ring.
2. A method according to claim 1, wherein each aperture is defined by side margins at the sides of the strip material and by cross pieces extending laterally of the strip material between the margins and each opening is formed by cutting away at least a portion of one of the side margins of one of said apertures.
3. A method according to claim 2, wherein the cut-away portions each extend substantially completely between a pair of associated adjacent cross pieces.
4. A method according to claim 2, wherein the cut-away portions each extend partially between a pair of associated adjacent cross pieces.
5. A method according to claim 2, 3 or 4 and further comprising shaping the crosspieces to impart a tapered profile thereto in a direction normally outwards from the strip material.
6. A method according to claim 5, wherein the shaping of the cross pieces takes place prior to formation of the openings.
7. A method according to any one of claims 1 to 6, wherein the apertures are formed prior to the formation of the open ings.
8. A method according to any one of claims 1 to 7, wherein the apertures are rectangular in shape.
9. A method according to any one of claims 1 to 8, wherein the free ends of the strip material are bonded together during the formation of the ring.
10. A method according to any one of claims 2 to 6, wherein the frusto-conical profile is imparted to the ring by bending the cross pieces radially inwards or outwards.
11. A method according to claim 10, wherein the cross pieces are bent about their juncture with the continuous side margin opposite the openings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (21)

**WARNING** start of CLMS field may overlap end of DESC **. tion, and Figures 8 to 10 depict the stages involved in assembling a roller bearing employing the cage. As shown in Figure 1, a strip of metal, more particularly soft mild steel, is initially formed with a series of spaced rectangular apertures 11 which are conveniently punched into the strip. The resulting ladder-like band 10 has continuous side margins 12 adjoined by regular cross-pieces 13. In the next operation depicted in Figures 2 and 3 on a somewhat larger scale, the cross-pieces 13 are relieved and provided with tapered upper end regions 14, for example, by use of a coining tool 15. Thereafter, as depicted in Figures 4 and 5 the margin 12a at one side of the band 10 is cut away at alternate apertures 11 to form openings 20 at that side 12a. The portions cut-away conveniently by punching, may extend completely between the cross-pieces 13 of the associated openings 11 as shown in Figure 4 with the dimension 'S' of the openings 20 corresponding to that of the apertures 11. Alternatively the cut-away portions may extend only partly between the cross-pieces 13 to leave residual projections 12' as shown in Figure 5. The resultant castellated band shown in Figure 4 or 5 is next rolled into a closed ring to thereby form the cage 10' and the free ends of the band are joined as by welding. The tapered regions 14 are now either at the outside or inside of the cage 10' depending on the desired function of the cage 10' in the bearing, i.e., whether the cage 10' is assembled to the inner or outer ring of the roller bearing. After the formation of the basic ring, the cage 10' overall is given a frusto-conical side profile by bending the cross pieces 13 radially outwardly or inwardly from the continuous margin 12 as shown in Figures 6 and 7, respectively. The cage 10' shown in Figure 6 is used where the rollers of the bearing are to be retained on the inner race of the bearing while the cage 10' shown in Figure 7 is used where the rollers of the bearing are to be retained on the outer race of the bearing. During the subsequent assembly of the bearing, the rollers 17 are inserted into the track or raceway of the inne race 18 of the bearing as shown in Figure 8 or of the outer race 19 of the bearing as shown in Figure 9. The pre-shaped cage 10 of Figure 6 or 7 is next placed with its closed apertures 11 over the rollers 17 as shown in Figure 8 or 9, respectively. The cross-pieces 13 are then bent back into parallelism to restore the normal regular nng shape to the cage 10'. The final restored shape of the cage 10' is depicted in Figure 10 which corresponds to the bearing represented in Figure 9. Finally the inner (Figure 9, 10) or the outer race (Figure 8) is fitted. During assembly, it is also possible to load the rollers into the pre-shaped cage 10' shown in Figure 6 or Figure 7 then to fit the rollers 17 into the raceway together with the cage 10' and finally to deform the cross pieces 13 back to their original position to retain the rollers 17 as before. WHAT WE CLAIM IS:
1. A method of producing a cage for a rolling element bearing; said method comprising treating strip material to form apertures spaced apart along the strip to receive the rolling elements of the bearing into which the cage is incorporated and spaced openings at one side of the strip which communicate with at least some of the apertures, forming the treated strip material into a ring and imparting a frusto-conical profile to the ring.
2. A method according to claim 1, wherein each aperture is defined by side margins at the sides of the strip material and by cross pieces extending laterally of the strip material between the margins and each opening is formed by cutting away at least a portion of one of the side margins of one of said apertures.
3. A method according to claim 2, wherein the cut-away portions each extend substantially completely between a pair of associated adjacent cross pieces.
4. A method according to claim 2, wherein the cut-away portions each extend partially between a pair of associated adjacent cross pieces.
5. A method according to claim 2, 3 or 4 and further comprising shaping the crosspieces to impart a tapered profile thereto in a direction normally outwards from the strip material.
6. A method according to claim 5, wherein the shaping of the cross pieces takes place prior to formation of the openings.
7. A method according to any one of claims 1 to 6, wherein the apertures are formed prior to the formation of the open ings.
8. A method according to any one of claims 1 to 7, wherein the apertures are rectangular in shape.
9. A method according to any one of claims 1 to 8, wherein the free ends of the strip material are bonded together during the formation of the ring.
10. A method according to any one of claims 2 to 6, wherein the frusto-conical profile is imparted to the ring by bending the cross pieces radially inwards or outwards.
11. A method according to claim 10, wherein the cross pieces are bent about their juncture with the continuous side margin opposite the openings.
12. A method according to any one of
claims 10 to 11, wherein the ring is subsequently restored to a regular shape during assembly of the cage in the bearing.
13. A method of producing a cage for a cylindrical rolling element bearing; said method comprising treating strip metal material to form apertures spaced apart along the strip to receive the rolling elements of the bearing into which the cage is incorporated and openings at one side of the strip which are spaced to communicate with alternate apertures to provide a castellated profile to the strip material, forming the treated strip material into a ring and joining the ends of the strip together and imparting a frusto-conical profile to the ring to facilitate the subsequent assembly in the bearing.
14. A method of producing a cage for a rolling element bearing; said method comprising treating strip metal material to form apertures spaced apart centrally along the strip which serve to receive the rolling elements and openings at one side which communicate with some of the apertures and forming the treated strip material into a frusto-conical ring to facilitate the subsequent assembly of the cage with the bearing during which the regular shape of the ring is restored.
15. A method of producing a cage for a rolling element bearing substantially as described with reference to, and as illustrated in Figures 1 to 7 of the accompanying drawings.
16. A cage when produced by the method according to any one of the preceding claims.
17. A method of assembling a rolling element bearing incorporating a cage produced by the method of any one of the preceding claims wherein the pre-formed frusto-conical ring is assembled to the inner or outer race of the bearing and to the rolling elements thereof, which are engaged with the track of the said inner or outer race, and the regular shape of the ring is then restored.
18. A method according to claim 17, wherein the cage is produced by the method of claim 10, 11 or 15 and wherein the regular shape of the ring is restored by bending the cross-pieces back into parallelism.
19. A method according to claim 17 or 18 and further comprising introducing the other race of the bearing.
20. A method of assembling a rolling element bearing substantially as described with reference to, and as illustrated in Figures 8 to 10 of the accompanying drawings.
21. A bearing incorporating a cage according to claim 16 and/or assembled according to any one of claims 17 to 20.
GB26012/78A 1978-05-31 1978-05-31 Production and assembly of rolling element bearings Expired GB1604570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB26012/78A GB1604570A (en) 1978-05-31 1978-05-31 Production and assembly of rolling element bearings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26012/78A GB1604570A (en) 1978-05-31 1978-05-31 Production and assembly of rolling element bearings

Publications (1)

Publication Number Publication Date
GB1604570A true GB1604570A (en) 1981-12-09

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Family Applications (1)

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GB26012/78A Expired GB1604570A (en) 1978-05-31 1978-05-31 Production and assembly of rolling element bearings

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GB (1) GB1604570A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3925512A1 (en) * 1989-08-02 1991-02-07 Skf Gmbh CAGE
US7766555B2 (en) 2004-02-20 2010-08-03 Ntn Corporation Roller bearing and method of assembling the same
CN104084477A (en) * 2014-07-21 2014-10-08 济宁精益轴承有限公司 Blanking die of needle bearing cage
US10955004B2 (en) 2018-10-10 2021-03-23 The Timken Company Wire-formed bearing cage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3925512A1 (en) * 1989-08-02 1991-02-07 Skf Gmbh CAGE
FR2650643A1 (en) * 1989-08-02 1991-02-08 Skf Gmbh CAGE FOR HOLDING THE ROLLERS OF A BEARING, WITH SIDE RINGS CONNECTED BY SPACERS
US5039231A (en) * 1989-08-02 1991-08-13 Skf Gmbh Bearing cage
US7766555B2 (en) 2004-02-20 2010-08-03 Ntn Corporation Roller bearing and method of assembling the same
CN104084477A (en) * 2014-07-21 2014-10-08 济宁精益轴承有限公司 Blanking die of needle bearing cage
CN104084477B (en) * 2014-07-21 2016-08-24 济宁精益轴承有限公司 A kind of blanking die of needle bearing cage
US10955004B2 (en) 2018-10-10 2021-03-23 The Timken Company Wire-formed bearing cage

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Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee