• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ROLLER BEARING ASSEMBLY A bearing assembly having a roller bearing with an inner race fitted around the trunnion portion of an axle is provided. An outer track combines with the inner track to receive rolling elements. A support ring is centered on the branch of the tree. An annular wear ring is positioned between the inner race and the support ring. An improved lubricant sealing arrangement is provided between the wear ring and the outer support track, and includes a rotor, a seal, a deflector and, in some embodiments, a stator.
    公开号:BR102012020876B1
    申请号:R102012020876-8
    申请日:2012-08-20
    公开日:2021-03-02
    发明作者:Mark W. Fetty；Michael A. Mason；Paul A. Hubbard
    申请人:Amsted Rail Company, Inc；
    IPC主号:
    专利说明:

    BACKGROUND OF THE INVENTION
    [001] This invention relates to sealed shaft journal bearings and, more particularly, to an improved tapered roller bearing assembly sealing arrangement.
    [002] Roller bearing assemblies incorporating two tapered roller bearing rows pre-assembled in a self-contained pre-lubricated housing for mounting on trunnions at the ends of shafts or trees are known. These bearing assemblies are used as railway wagon bearings mounted on trunnions at the ends of the wagon axles. Bearings of this type typically employ two rows of tapered roller bearings fitted one at each end of a normal bearing bush with their respective bearing cones having an internal diameter dimensioned to provide an interference fit with the tree trunnion and with a cylindrical sleeve or spacer positioned (o) between the cones providing precise spacing and appropriate lateral clearance in the trunnion. Seals mounted inside each end of the bearing bush provide sealing contact with wear rings approaching the outer ends or the rear face of the respective bearing cones at each end of the assembly. These seals are shown in US Patents 5,975,533 and 7,607,836.
    [003] In a typical railway wagon installation, the shaft journal is machined with a fillet at the inner end, and a support ring having a surface complementary to the contour of the fillet and a meeting surface to engage the inner end of the wear ring Precision internal positions the bearing assembly in the trunnion. An end bush mounted on the end of the shaft by screws threaded into holes on the end of the shaft engages the outer wear ring and secures the entire assembly to the end of the journal tree. SUMMARY OF THE INVENTION
    [004] The bearing assembly of the present invention is a roller bearing that includes an inner race or cone fitted around the trunnion portion of the shaft or shaft. The inner race includes an outward-facing bearing track path. An external track or bushing has a track path directed inwards. The roller elements are located between and in contact with the inner and outer track paths.
    [005] A support ring has a contoured surface complementing and engaging the contoured surface of a fillet formed on the tree. The fillet runs from the trunnion to the protrusion of the tree. The contoured surfaces cooperate to fix the support ring against axial movement along the shaft.
    [006] The bearing assembly includes a seal assembly that provides a barrier for lubricant to be retained within the seal assembly and to keep any contaminants away. The seal assembly may include a stator adjacent to the seal section itself and a rotor adjacent to a wear ring. A baffle having a section adjacent to the wear ring is also provided. The intercorrelated relationship between the sealing section, stator, rotor and deflector acts to retain the lubricant within the seal assembly and keep any contaminants away. BRIEF DESCRIPTION OF THE DRAWINGS In the Drawings:
    [007] FIG. 1 is a cross-sectional view of a tree trunnion with a tapered roller bearing assembly in accordance with one embodiment of the present invention.
    [008] FIG. 2 is a partial detailed cross-sectional view of a tapered roller bearing seal assembly according to a first embodiment of the present invention.
    [009] FIG. 3 is a detailed partial cross-sectional view of a tapered roller bearing assembly according to a second embodiment of the present invention.
    [0010] FIG. 4 is a detailed partial cross-sectional view of a tapered roller bearing assembly according to a third embodiment of the present invention. DESCRIPTION OF THE PREFERRED EMBODIMENTS
    [0011] Referring now to fig. 1 of the drawings, a bearing assembly generally indicated by reference number 10 in fig. 1 is shown mounted on a trunnion 12 at the free cantilever end of a tree or axle 14, typically a rail car axle. Trunnion 12 is machined to very narrow tolerances and ends at its inner end in a contoured thread 22 leading to a cylindrical shoulder 18 of the shaft 14. At the free end of the shaft, the trunnion portion 12 ends in a slightly tapered guide portion or tapered 24 dimensioned to facilitate installation of the bearing assembly on the trunnion. A plurality of threaded holes 26 is formed at the end of the shaft 14 to receive threaded head screws, or dowels 28 for mounting a bearing retaining cap 30 at the end of the tree to hold the bearing in position, as more fully described here below .
    [0012] The bearing assembly 10 is pre-assembled before being mounted and secured on the trunnion 12 by the cover 30 and bolts 28. The bearing assembly includes a single bearing bush or external track path 32 having a pair of paths of track 34, 36, which form one adjacent to each end thereof, which cooperate with a pair of bearing cones 38, 40, respectively, to support the two rows of tapered rollers 42, 44 respectively, between them. A central spacer 46 is positioned between the cones 38, 40 to keep the cones in a position precisely spaced from each other, allowing appropriate clearance in the bearing.
    [0013] The bearing bush 32 is provided with cylindrical countersinks 17, 19 at its opposite ends outside the track paths 34, 36, and a pair of sealing sections 52, 58 is pressed one in each of the cylindrical countersinks 17, 19 in bushing 32. Each sealing section 52, 58 includes resilient sealing elements that rub over and form a seal with surfaces 37, 61 of a pair of seal wear rings 60, 52, with one end directed inwards at engage with the ends directed out of the bearing cones 38, 40, respectively. Sealing section 58 is similar to sealing section 52, and will not be described in detail. The outer end of the wear ring 60 is received in a cylindrical countersunk 64 at the end directed axially out of an annular support ring 66 which, in turn, has a countersink 68 at its other end which is dimensioned to be received in relation to of interference on the cylindrical shoulder 18 of the tree 14. The counter-hole 64 and the outer diameter of the wear ring 60 are also dimensioned to provide an interference fit, so that the wear ring 60 is pressed into the support ring 66, which it is precisely machined to provide a complementary contoured inner surface 70 and engaging with the contour of the fillet 22 when the bearing is mounted on the tree. The end directed towards the wear ring 62 rests against a counter-hole 31 in the retaining cover 30.
    [0014] Referring now to fig. 2, a detailed view of the seal assembly portion of the bearing assembly 10 is provided. The sealing section 52 is seen to comprise a generally cylindrical part, having a first end section of a larger diameter 48 pressed or fitted into a complementary counter 17 in the bush 32. The sealing section 52 includes an intermediate section 53 which extends parallel to a first end section 48, and a second end section 54 extending from the intermediate section 53 and parallel to the first end section 48. A portion 55 of the intermediate section 53 is normal to the intermediate section 53.
    [0015] A rotor 81 is seen to be a generally cylindrical part having an outer section 82 of a larger diameter. An intermediate section 83 extends from the outer section 82 and is generally normal to it. The intermediate section 83 includes a generally flat outer section 93 which is fitted against a complementary flat surface 94 of the bearing cone 38. An inner section 84 of the rotor 81 extends from the intermediate section 83 and is generally normal thereto. The inner section 84 of the rotor has an outer surface 95 which is fitted against the outer surface 37 of the wear ring 60. The baffle 112 is a generally cylindrical structure normally composed of steel or a polymer plastic. Deflector 112 includes a first end section 114, an intermediate section 116 normal to the first end section 114 and a second end section 118 normal to the intermediate section 116. The first end section 114 is of a larger diameter than the second section end section 118. The first end section 114 is located adjacent to and radially outside intermediate section 53 of seal 52. Intermediate section 116 is located adjacent and radially within seal portion 55. The second end section 118 includes an outer surface which is adjacent to and against the outer surface 37 of the wear ring 60.
    [0016] The outer surface 95 of the inner section of rotor 84 is welded, glued, or engaged by interference to the outer surface 37 of wear ring 60. A crimp or rib 97 or other fixing means may be located in the inner section 84 of the wear ring. rotor 81 to affix to the outer surface 37 of the wear ring 60. A chamfer 98 on the outer surface 37 of the wear ring 60 helps the crimp or rib 97 with respect to the outer surface 37. The combination and configuration of the sealing section 52 , baffle 112, rotor 81 assists in retaining lubricant within the seal assembly. As the rotor 81, the inner section 84, and the outer section 82 rotate around the second seal end section 54, the path required for the lubricant to escape from within the seal assembly is tortuous. Preferably, the second end section of the seal 54 extends a minimum of about halfway to the channel formed by the outer section 82 and inner section 84 of the rotor, but this extension could be from 25% to 75% or more. It should be understood that the seal 52 itself is normally composed of a suitable steel, as are rotor 81, stator 47 and baffle 112. However, it is within the scope of the present invention to have one or more of the seal 52, rotor 81 or deflector 112 composed of an engineering plastic or thermoplastic polymer, such as a polyester or composite material.
    [0017] Referring now to fig. 3, a detailed view of a second embodiment of a seal assembly portion 110 is provided. A sealing section 152 is seen comprising a generally cylindrical part, having a first end section 148 pressed or fitted into a complementary counter-hole 117 in a sleeve 132. Sealing section 152 includes an intermediate section 153 that extends normal to the first section end section 148, and a second end section 155 has a smaller diameter than the first end section 148 and is parallel thereto.
    [0018] A stator 147 is a generally cylindrical part, having a first end section 149 having an outer surface 159 adjacent and affixed to an inner surface 157 of the second end section 155 of seal 152. Stator 147 also includes an intermediate section 161 which is normal to a first end section 149 and a second end section 151 which is normal to an intermediate section 161.
    [0019] A rotor 181 is seen to be a generally cylindrical part having an outer section 182 of a larger diameter. An intermediate section 183 extends from the outer section 182 and is generally normal to it. The intermediate section 183 includes a generally flat outer section 193 which is fitted against a complementary flat surface 194 of the bearing cone 138. An inner section 184 of the rotor 181 extends from the intermediate section 183 and is generally normal thereto. The inner section 184 of the rotor 181 has an outer surface 195 that is engaged against the outer surface 137 of the wear ring 160.
    [0020] The outer surface 195 of the rotor 181 is welded, glued or fitted by interference to the outer surface 137 of the wear ring 160. A crimp or rib 197 or other fixing means may be located in a corner between the intermediate section 183 of the rotor 181 and the outer surface 195 of the inner section 184 of rotor 181 to affix to the outer surface 137 of wear ring 160. A chamfer 198 on the outer surface 137 of wear ring 160 helps the crimp or rib 197 with the location on the external surface 137.
    [0021] A baffle 212 is a generally cylindrical structure normally composed of steel or polymer plastic. Deflector 212 includes a first end section 214, an intermediate section 216 normal to the first end section 214 and a second end section 218 normal to the middle section 216. The first end section 214 is of a larger diameter than the second section end 218 and is located adjacent to and radially outside the second end section 155 of seal 152. Intermediate section 216 is located adjacent and radially within stator intermediate section 161. The second end section 218 includes an outer surface that is adjacent a and against the outer surface 137 of the wear ring 160.
    [0022] The combination and configuration of the sealing section 152, including the stator section 147, deflector 212 and rotor 181 assist in retaining lubricant within the sealing assembly. As rotor 181, inner section 184 and outer section 182 rotate around the second end section 151 of stator 147, the path required for lubricant to escape from within the seal assembly is tortuous. Preferably, the second end section of stator 147 extends about halfway to the channel formed by the outer section of rotor 182 and inner section 184, but this extension could be from 25% to 75% or more. It should be understood that the sealing box 152 itself is normally composed of suitable steel, as are rotor 181, stator 147 and deflector 212. However, it is within the scope of the present invention to have one or more of the section seal 152, rotor 181, stator 147 and deflector 212 composed of an engineering thermoplastic, such as polyester or composite material.
    [0023] Referring now to fig. 4, a detailed view of a third embodiment of a bearing assembly seal assembly portion 210 is provided. A sealing section 352 is seen to comprise a generally cylindrical part, having first end section 348 pressed or fitted into a complementary bore 317 and a bush 332. Sealing section 352 includes an intermediate section 355 that extends normal to the first section end section 348, and a second end section 353 has a smaller diameter than that of the first end section 348, and is parallel thereto.
    [0024] A stator 347 is a generally cylindrical part, having a first end section 349 having an outer surface 359 adjacent and affixed to an inner surface 357 of the second end section 353 of seal 352. Stator 347 also includes an intermediate section 361 extending from the first end section 349, and a second end section 351 extending from the middle section 361.
    [0025] A rotor 381 is seen to be a generally cylindrical part having an outer section 382 of a larger diameter. An intermediate section 383 extends from the outer section 382 and is generally normal to it. The intermediate section 383 includes a generally flat outer section 393 which is fitted against a complementary flat surface 394 of the bearing cone 338. An inner section 384 of the rotor 381 extends from the intermediate section 383 and is generally normal thereto. The inner section 384 of the rotor 381 has an outer surface 395 which is engaged against an outer surface 337 of the wear ring 360.
    [0026] The outer surface 395 of the rotor 381 is welded, glued or fitted by interference on the outer surface 337 of the wear ring 360 A crimp or rib 397 or other fixing means may be located in a corner between the intermediate section 383 of the rotor 381 and the outer surface 395 of the inner section 384 of the rotor 381 to affix to the outer surface 337 of the wear ring 360. A chamfer 398 on the outer surface 337 of the wear ring 360 helps the crimp or rib 397 with the location on the surface 337.
    [0027] The deflector 312 is a generally cylindrical structure normally composed of steel or a polymer plastic. Deflector 312 includes a first end section 314, an intermediate section 316 normal to the first end section 314 and a second end section 318 normal to the intermediate section 316. The first end section 314 is of a larger diameter than the second section end 318 and is located adjacent to and radially out of intermediate section 355 of seal 352. Intermediate section 316 is located adjacent and laterally within end section 353 of the second seal. The second end section 318 includes an outer surface that is adjacent to and meets the outer surface 337 of wear ring 360.
    [0028] The combination and configuration of the seal section 352, including the stator section 347, deflector 312 and rotor 381 assist in retaining lubricant within the seal assembly. As rotor 381, inner section 384 and outer section 382 rotate over the second end section 351 of stator 347, the path required for lubricant to escape from within the seal assembly is tortuous. Preferably, the second end section 331 of stator 347 extends about halfway to the channel formed by the outer section of rotor 382 and inner section 384, but this extent could be from 25% to 75% or more. It should be understood that the sealing box 352 itself is normally composed of suitable steel, as are rotor 381, stator 347 and deflector 312. However, it is within the scope of the invention to have one or more of the section seal 352, rotor 381, stator 347 and deflector 312 composed of an engineering thermoplastic, such as polyester or composite material.
    权利要求:
    Claims (10)
    [0001]
    1. Bearing assembly, characterized by the fact that it comprises: a bearing cone (138, 338) including a track path directed outwards; a bearing bush (132, 332) including an inwardly tapered track path located radially outwardly in relation to the bearing cone track path, and rolling elements located between the inner and outer track paths; the bearing bush (132, 332) having a cylindrical counter-hole (117, 317) facing inward; a wear ring (160, 360) having a cylindrical outer surface (195, 395); a seal (152, 352) having a first end section (148, 348) received in interference relation within the cylindrical counter bore (117, 317) in the bearing bush (132, 332) and a second end section (155, 355); a rotor element (181, 381) of a generally cylindrical shape, the rotor element (181, 381) comprising an outer section (182, 382), an intermediate section (183, 383) and an inner section (184, 384 ); and a stator element (147, 347) of a generally cylindrical shape, the stator element (147, 347) comprising an outer section (149, 349), an intermediate section (161, 361) and an inner section (151, 351); the outer section (149, 349) of the stator element (147, 347) having an outer surface adjacent to the second end section (155, 355) of the seal (152, 352); the inner section (151, 351) of the stator element (147, 347) extending between the outer section (182, 382) and the inner section (184, 384) of the rotor element (181, 381); and a deflector element (212, 312) of a generally cylindrical shape, the deflector element (212, 312) comprising an outer section (214, 314) and an inner section (218, 318), the inner section (218, 318) of the baffle element (212, 312) having an outer surface adjacent to the cylindrical outer surface (195, 395) of the wear ring (160, 360), and the outer section (214, 314) of the baffle element (212 , 312) radially outwardly and adjacent to the second end section (155, 355) of the seal (152, 352).
    [0002]
    2. Bearing assembly according to claim 1, characterized in that the intermediate section (183, 383) of the rotor element (181, 381) is generally normal to the outer section (182, 382) of the rotor and to the section internal (184, 384) of rotor to form a channel-shaped structure, and in which the second end section of the stator element (147, 347) extends into the channel-shaped structure.
    [0003]
    3. Bearing assembly according to claim 1, characterized by the fact that the intermediate section (161, 361) of the deflector (212, 312) extends adjacent to the intermediate section (161, 361) of the stator element (147 , 347).
    [0004]
    4. Roller bearing assembly, characterized by the fact that it comprises: a cone (138, 338) having a track path directed outwards over it; a bushing (132, 332) having a track path directed inwards over it; the bushing (132, 332) having a generally radially outwardly directed face; the bushing (132, 332) having a cylindrical counter-hole (117, 317) facing inward; a wear ring (160, 360) adjacent to the cone (138, 338), the wear ring (160, 360) having a cylindrical outer surface (195, 395); a seal (152, 352) having a generally cylindrical configuration, the seal (152, 352) having a first end section received in the cylindrical counter-hole (117, 317) facing into the bush (132, 332); the seal (152, 352) having an intermediate section and a second end section (155, 355); a rotor of generally cylindrical shape, the rotor comprising an outer section (182, 382), an intermediate section (183, 383) and an inner section (184, 384); the inner section (184, 384) of the rotor having an outer surface adjacent to the cylindrical outer surface (195, 395) of the wear ring (160, 360); and a stator of a generally cylindrical shape; the stator having a first end section adjacent to the intermediate seal section (152, 352), the stator having a second end section extending between the outer section (182, 382) and the inner section (184, 384) of the rotor; and comprising a baffle (212, 312) of a generally cylindrical shape, the baffle element (212, 312) comprising an inner section (218, 318) having an outer surface adjacent to the cylindrical outer surface (195, 395) of the ring wear (160, 360).
    [0005]
    5. Roller bearing assembly according to claim 4, characterized in that the intermediate section (183, 383) of the rotor element (181, 381) is generally normal to the external section (182, 382) of the rotor and to the inner section (184, 384) of the rotor to form a channel-shaped structure, and in which the intermediate section (183, 383) of the rotor element (181, 381) has a generally flat outer surface that meets the face generally flat radially out of the cone (138, 338).
    [0006]
    6. Roller bearing assembly according to claim 4, characterized in that the deflector (212, 312) comprises an intermediate section (216, 316) and a second end section (214, 314), and in which the second end section (214, 314) is adjacent to the intermediate section (155, 355) of the seal (152, 352).
    [0007]
    Roller bearing assembly according to claim 4, characterized in that it further comprises a support ring (66, 166) of a generally cylindrical configuration having a generally flat side surface, and in which the deflector (11, 212, 312) comprises an intermediate section (116, 216, 316) which is adjacent to the lateral surface of the support ring (66, 166).
    [0008]
    Roller bearing assembly according to claim 4, characterized in that the rotor (81, 181, 381) is composed of a polymer material.
    [0009]
    Roller bearing assembly according to claim 4, characterized in that the deflector (112, 212, 312) is composed of a steel material or a polymer plastic material.
    [0010]
    10. Roller bearing assembly according to claim 4, characterized in that the stator (147, 347) is composed of a plastic polymer material.
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    同族专利:
    公开号 | 公开日
    CA2785005C|2014-02-18|
    CN103016515B|2015-11-25|
    EP2573413B1|2017-06-28|
    AU2012204102B2|2016-04-14|
    US8360651B1|2013-01-29|
    RU2522196C2|2014-07-10|
    AU2012204102A1|2013-04-11|
    CN103016515A|2013-04-03|
    MX2012008881A|2013-03-21|
    ZA201205179B|2013-05-29|
    EP2573413A1|2013-03-27|
    JP2013068324A|2013-04-18|
    RU2012139656A|2014-03-27|
    CA2785005A1|2013-03-22|
    UA105088C2|2014-04-10|
    BR102012020876A2|2015-09-29|
    JP5539471B2|2014-07-02|
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    法律状态:
    2015-09-29| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-06-23| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-01-05| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-03-02| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 20/08/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/200236|2011-09-22|
    US13/200,236|US8360651B1|2011-09-22|2011-09-22|Roller bearing seal|
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