AU2011201817A1 - Railway car bearing seal spacer assembly - Google Patents

Railway car bearing seal spacer assembly Download PDF

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Publication number
AU2011201817A1
AU2011201817A1 AU2011201817A AU2011201817A AU2011201817A1 AU 2011201817 A1 AU2011201817 A1 AU 2011201817A1 AU 2011201817 A AU2011201817 A AU 2011201817A AU 2011201817 A AU2011201817 A AU 2011201817A AU 2011201817 A1 AU2011201817 A1 AU 2011201817A1
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AU
Australia
Prior art keywords
spacer
generally cylindrical
cup
radially
bearing assembly
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
Application number
AU2011201817A
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AU2011201817B2 (en
Inventor
Mark W. K. Fetty
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.)
Amsted Rail Co Inc
Original Assignee
Amsted Rail Co Inc
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Filing date
Publication date
Application filed by Amsted Rail Co Inc filed Critical Amsted Rail Co Inc
Publication of AU2011201817A1 publication Critical patent/AU2011201817A1/en
Application granted granted Critical
Publication of AU2011201817B2 publication Critical patent/AU2011201817B2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F15/00—Axle-boxes
    • B61F15/20—Details
    • B61F15/22—Sealing means preventing entrance of dust or leakage of oil
    • 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
    • F16C19/38—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 two or more rows of rollers
    • F16C19/383—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 two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—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 two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—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 two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/04—Preventing damage to bearings during storage or transport thereof or when otherwise out of use
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles

Abstract

RAILWAY CAR BEARING SEAL SPACER ASSEMBLY Abstract A bearing assembly (10) is provided having a roller bearing with two cones (38, s 40) defining an inner raceway fitted around the journal portion (12) of an axle (14). A cup (32) defines an outer raceway that combines with the inner raceway to receive roller elements (42, 44). A spacer (46) separates the cones, and a spacer support (72) is provided to position and support the spacer. in

Description

S&F Ref: 993934 AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT Name and Address AMSTED Rail Company, Inc., of 311 S. Wacker, Suite of Applicant: 5300, Chicago, Illinois, 60606, United States of America Actual Inventor(s): Mark W.K. Fetty Address for Service: Spruson & Ferguson St Martins Tower Level 35 31 Market Street Sydney NSW 2000 (CCN 3710000177) Invention Title: Railway car bearing seal spacer assembly The following statement is a full description of this invention, including the best method of performing it known to me/us: 5845c(3780543_1) RAILWAY CAR BEARING SEAL SPACER ASSEMBLY BACKGROUND OF THE INVENTION This invention relates to shaft journal bearings and, more particularly, to an improved bearing assembly spacer supporting arrangement for use in a railway freight car. Roller bearing assemblies incorporating two rows of tapered roller bearings preassembled into a self-contained, pre-lubricated package for assembly onto journals at the ends of axles or shafts are known. Such bearing assemblies are used as rail car bearings assembled onto journals at the ends of the axles. Bearings of this type typically employ two rows of tapered roller bearings fitted one into each end of a common bearing cup with their respective bearing cones having an inner diameter dimensioned to provide an interference fit with the shaft journal and with a cylindrical sleeve or spacer positioned between the cones providing accurate spacing and proper lateral clearance on the joumal. Seals mounted within each end of the bearing cup provide sealing contact with wear rings bearing against the outer ends or back face of the respective bearing cones at each end of the assembly. Such seals are shown in US. Pat. Nos. 5,975,533, 7,607,836, and 7,534,047. In a typical rail car installation, the axle journal is machined with a fillet at the inboard end. A backing ring having a surface complementary to the contour of the fillet and an abutment surface for engaging the inboard end of an inner wear ring accurately position the bearing assembly on the journal. An end cap mounted on the end of the axle by bolts threaded into bores in the end of the axle engages the outboard wear ring 1 and clamps the entire assembly on the end of the axle. The wear rings typically have an inner diameter dimensioned to provide interference fit with the journal over at least a portion of their length so that the entire assembly is pressed as a unit onto the end of the journal shaft portion of the axle. It is desirable to assure the support and proper spacing of the cones by assuring the support and positioning of the spacer. SUMMARY OF THE INVENTION The bearing assembly of the present invention is a roller bearing that includes an inner race or cone fitted around the journal portion of the axle or shaft. The inner race formed by the cones includes an outwardly directed raceway. An outer race or cup has an inwardly directed raceway. Roller elements are located between and contacting the inner and outer raceways. A backing ring has a contoured surface complementary to and engaging the contoured surface of a fillet formed on the shaft. The fillet leads from the journal to the shoulder of the shaft. The contoured surfaces cooperate to fix the backing ring against axial movement along the shaft. The bearing assembly includes a seal assembly that provides a barrier for lubricant to be retained within the seal assembly and for contaminants to be kept out. A spacer is provided to assure the proper spacing of the two cones. A spacer support is provided to assure the proper positioning and support of the spacer during shipping and installation. The spacer support can remain in place after installation of the bearing assembly on an axle. 2 BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, FIG. 1 is a sectional view of a shaft journal having mounted thereon a tapered roller bearing assembly in accordance with an embodiment of the present invention; FIG. 2 is an end view of a spacer support in accordance with an embodiment of the present invention, and FIG. 3 is a detailed partial view in cross section of a tapered roller bearing spacer assembly in accordance with an embodiment of the present invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to FIG. 1 of the drawings, a bearing assembly indicated generally by the reference numeral 10 on FIG. 1 is shown mounted on a journal 12 on the free, cantilevered end of a shaft or axle 14, typically a rail car axle. Journal 12 is machined to very close tolerances and terminates at its inner end in a contoured fillet 22 leading to a cylindrical shoulder 18 of axle 14. At the free end of the axle, journal portion 12 terminates in a slightly conical or tapered guide portion 24 dimensioned to facilitate installation of the bearing assembly onto the journal. A plurality of threaded bores 26 are formed in the end of axle 14 for receiving threaded cap screws, or bolts 28 for mounting a bearing retaining cap 30 on the end of the shaft to clamp the bearing in position as described more fully herein below. Bearing assembly 10 is preassembled before being mounted and clamped on journal 12 by retaining cap 30 and bolts 28. The bearing assembly includes a unitary 3 bearing cup or outer raceway 32 having a pair of inner facing raceways 34,36 formed one adjacent each end thereof which cooperate with a pair of bearing cones 38,40, having outer facing raceways respectively, to support the two rows of tapered rollers 42,44, respectively there between. A center spacer 46 is positioned between cones 38, 40 to maintain the cones in accurately spaced position relative to one another allowing for proper bearing lateral clearance. Spacer support 72 is seen as a generally cylindrical unitary structure usually comprised of a plastic, such as a high density polyethylene. Spacer support 72 has a radially inner edge adjacent radially outward facing outer surface 73 of spacer 46. Spacer support 72 has a radially outer edge adjacent a radially inward facing center section 71 of cup 32. Spacer support 72 inner edge may engage or contact radially outward facing outer surface 73 of spacer 46. Spacer support 72 outer edge 79 may engage or contact radially inward facing counter section 71 of cup 32. Whether or not actual contact is present, spacer support 72 acts to position and hold spacer 46 in position between cones 38 and 40 during shipping and assembly of bearing assembly 10. Spacer support 72 may initially upon installation for shipping contact both radially inward facing center section 71 of cup 32 and radially outward facing outer surface 73 of spacer 46, and after installation and wear in service, may contact one, both, or neither. Bearing cup 32 is provided with cylindrical counterbores 17,19 at its axially outer ends and a pair first end sections 48, 50 of seal sections 52,54 are pressed one into each of the cylindrical counterbores 17,19 in cup 32. Each second end section 55, 63 of 4 seal section 52,54 may include resilient sealing elements 56, 58 which rub upon and form a seal with radial outer surfaces 37,61 of a pair of seal wear rings 60,62 having an inwardly directed end in engagement with the outwardly directed ends of bearing cones 38,40 respectively. Seal section 54 is similar to seal section 52 and will not be described in detail. The other end of wear ring 60 is received in a cylindrical counterbore 64 in the axially outwardly directed end of an annular backing ring 66 which, in turn, has a counterbore 68 at its other end which is dimensioned to be received in interference and non-interference relation on the cylindrical shoulder 18 of shaft 14. The counterbore 64 and the outer diameter of wear ring 60 are also dimensioned to provide an interference fit so that wear ring 60 is pressed into the backing ring 66 which is accurately machined to provide a contoured inner surface 70 complementary to and engaging the contour of fillet 22 when the bearing is mounted on the shaft. The outwardly directed end of wear ring 62 bears against a counterbore 31 in a retaining cap 30. Referring now to figures 2 and 3, detailed views of spacer support 72 are provided, along with the positioning of spacer support 72 radially between cup 32 and spacer 46. Spacer support 72 has a radially inner edge that may include raised sections 77. Such raised sections 77 are adjacent and possibly would engage or contact radially outward facing outer surface 73 of spacer 46. Spacer support 72 has a radially facing outer edge 79 which is adjacent and possibly would engage or contact radially inward facing center section 71 of cup 32. 5

Claims (13)

1. A roller bearing assembly comprising: a generally cylindrical cone having a generally cylindrical, outwardly directed raceway thereon, a generally cylindrical cup having a generally cylindrical, inwardly directed raceway thereon, a generally cylindrical spacer adjacent the cone, the cone having a generally flat, axially inward face, the cup having a radially inward facing cylindrical counterbore, a generally cylindrical wear ring adjacent and axially inward from the generally flat, axially inward face of the cone, the wear ring having a generally cylindrical outer surface, a seal of generally cylindrical configuration, the seal having a first end section, an intermediate section and a second end section, the first end section received in the radially inward facing cylindrical counterbore of the cup, a resilient sealing element affixed to the second end section of the sealing element, the resilient sealing element contacting the generally cylindrical outer surface of the wear ring, and a spacer support of a generally cylindrical configuration having a radially inner edge adjacent the spacer and a radially outer edge adjacent the cup. 6
2. The roller bearing assembly of claim 1 wherein the spacer support is comprised of a plastic.
3. The roller bearing assembly of claim 1 wherein the spacer support is comprised of a high density polyethylene plastic.
4. The roller bearing assembly of claim 1 wherein the radially inner edge of the spacer support includes a plurality of raised sections that extend toward the spacer.
5. The roller bearing assembly of claim 1 wherein the cup includes a radially inward facing center section and the spacer includes a radially outward facing outer surface, and wherein the spacer support is between the radially inward facing center section of the cup and the radially outward facing surface of the spacer.
6. The roller bearing assembly of claim 5 wherein the radially inner edge of the spacer support engages the radially outward facing outer surface of the spacer and the radially outer edge of the spacer support engages the radially inward facing center section of the cup.
7. A roller bearing assembly comprising: a generally cylindrical cone having a generally cylindrical, outwardly directed raceway thereon, a generally cylindrical cup having a generally cylindrical, inwardly directed raceway thereon, a generally cylindrical spacer adjacent the cone, the cone having a generally flat, axially inward face, 7 the cup having a radially inward facing cylindrical counterbore, a generally cylindrical wear ring adjacent and axially inward from the generally flat, axially inward face of the cone, the wear ring having a generally cylindrical outer surface, a seal of a generally cylindrical configuration, the seal having a first end section, an intermediate section and a second end section, the first end section received in the inward facing cylindrical counterbore of the cup, and a spacer support of a generally cylindrical configuration having a radially inner edge adjacent that spacer and a radially outer edge adjacent the cup.
8. The roller bearing assembly of claim 7 wherein, the spacer support is comprised of a plastic.
9. The roller bearing assembly of claim 7 wherein the spacer support is comprised of high density polyethylene plastic.
10.The roller bearing assembly of claim 7 wherein the radially inner edge of the spacer support includes four plurality of raised sections that extend toward the spacer.
11.The roller bearing assembly of claim 7 wherein the cup includes a radially inward facing center section and the spacer includes a radially outward facing outer surface, and wherein the spacer support is adjacent the radially inward facing center section of the cup and the radially outward facing surface of the spacer.
12.The roller bearing assembly of claim 11 8 9 wherein the radially inner edge of the spacer support engages the radially outward facing outer surface of the spacer and the radially outer edge of the spacer support engages the radially inward facing center section of the cup.
13. A roller bearing assembly substantially as hereinbefore described with s reference to any one of the embodiments as that embodiment is shown in the accompanying drawings. Dated 19 April 2011 AMSTED Rail Company, Inc. o0 Patent Attorneys for the Applicant/Nominated Person SPRUSON & FERGUSON
AU2011201817A 2010-10-01 2011-04-20 Railway car bearing seal spacer assembly Active AU2011201817B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/924,605 US20120082407A1 (en) 2010-10-01 2010-10-01 Railway car bearing seal spacer assembly
US12/924,605 2010-10-01

Publications (2)

Publication Number Publication Date
AU2011201817A1 true AU2011201817A1 (en) 2012-04-19
AU2011201817B2 AU2011201817B2 (en) 2015-10-08

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ID=45889905

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2011201817A Active AU2011201817B2 (en) 2010-10-01 2011-04-20 Railway car bearing seal spacer assembly

Country Status (9)

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US (1) US20120082407A1 (en)
CN (1) CN102444664B (en)
AU (1) AU2011201817B2 (en)
BR (1) BRPI1103370B1 (en)
CA (1) CA2738230C (en)
MX (1) MX2011004432A (en)
RU (1) RU2471094C1 (en)
UA (1) UA101727C2 (en)
ZA (1) ZA201102712B (en)

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WO2014074507A1 (en) * 2012-11-06 2014-05-15 American Axle & Manufacturing, Inc. Axle assembly
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CN107076200B (en) * 2014-11-03 2023-02-28 光洋轴承北美有限责任公司 Roller bearing assembly
CN107269685B (en) * 2017-08-01 2023-06-13 昆山市朝阳轴承机电有限公司 Bearing and rotating structure
US10330156B2 (en) * 2017-08-10 2019-06-25 Amsted Rail Company, Inc. Axle roller bearing seal shroud
IT201700103582A1 (en) * 2017-09-15 2019-03-15 Skf Ab TERMINAL LOCKING CAP FOR A ROLLING BEARING
US10974742B2 (en) * 2018-05-31 2021-04-13 Aktiebolaget Skf Railcar adapter for connecting a railcar body to a bearing
DE102021105774A1 (en) 2021-03-10 2022-09-15 Schaeffler Technologies AG & Co. KG sealing ring

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Also Published As

Publication number Publication date
CN102444664A (en) 2012-05-09
RU2471094C1 (en) 2012-12-27
MX2011004432A (en) 2012-04-13
CA2738230A1 (en) 2012-04-01
BRPI1103370B1 (en) 2020-10-27
ZA201102712B (en) 2011-12-28
US20120082407A1 (en) 2012-04-05
BRPI1103370A2 (en) 2013-02-13
CA2738230C (en) 2013-12-03
CN102444664B (en) 2015-02-25
AU2011201817B2 (en) 2015-10-08
UA101727C2 (en) 2013-04-25

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