WO2018090915A1 - 推力轴承 - Google Patents

推力轴承 Download PDF

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Publication number
WO2018090915A1
WO2018090915A1 PCT/CN2017/110964 CN2017110964W WO2018090915A1 WO 2018090915 A1 WO2018090915 A1 WO 2018090915A1 CN 2017110964 W CN2017110964 W CN 2017110964W WO 2018090915 A1 WO2018090915 A1 WO 2018090915A1
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WIPO (PCT)
Prior art keywords
thrust
thrust bearing
thrust piece
piece
blades
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PCT/CN2017/110964
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English (en)
French (fr)
Inventor
宋涛
娄兆海
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Publication of WO2018090915A1 publication Critical patent/WO2018090915A1/zh
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    • 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
    • F16C33/58—Raceways; Race rings
    • 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
    • F16C33/66—Special parts or details in view of lubrication

Definitions

  • the present invention relates to thrust bearings, and in particular to improved lubricated thrust bearings.
  • Thrust bearings are widely used in bearings such as automotive air conditioning compressors and automotive transmissions.
  • bearings such as automotive air conditioning compressors and automotive transmissions.
  • applications such as automotive air conditioning compressors and automotive transmissions, the lubrication conditions of the bearings are poor.
  • the structure shown in Figure 1 can be used.
  • the thrust bearing includes an outer thrust piece 1, an inner thrust piece 4, a cage 2, and a rolling body 3.
  • the thrust bearing is mounted between the first member 5 and the second member 6 opposed to each other, and the lubricating oil can only pass through the inner thrust piece 4 and the outer thrust.
  • the gap g between the sheets 1 enters the bearing. If the system adopts passive oil mist lubrication method, or the lubricating oil flow is insufficient, it will lead to the formation of an effective lubricating oil film in the bearing raceway, that is, the working area, which will cause the bearing to fail due to poor lubrication, thereby reducing the service life of the bearing. .
  • the present invention has been made to solve the above problems, and an object of the present invention is to improve lubrication and/or cooling of a thrust bearing.
  • the invention may be employed, but is not limited to the following.
  • a thrust bearing including at least one thrust piece and a rolling body, wherein a plurality of blades and a plurality of openings are formed on a first thrust piece of the at least one thrust piece, the blade being opposite to the first
  • the other portion of a thrust piece is inclined at an opening angle to introduce lubricant and/or coolant into the oil feed gap of the thrust bearing via the opening as the first thrust piece rotates.
  • the first thrust piece includes a radially inner portion and a radially outer portion, and the plurality of blades and the plurality of openings are formed in the radially outer portion.
  • the vane at least partially overlaps the oil inlet gap as viewed in an axial direction of the thrust bearing, and a dimension of the vane in a radial direction of the thrust bearing is larger than a radial dimension of the oil inlet gap .
  • the root of the blade connected to the other portion of the first thrust piece extends substantially in a radial direction of the first thrust piece.
  • the plurality of blades are arranged along a circumferential direction of the first thrust piece, the plurality of blades are inclined in the same direction with respect to other portions of the first thrust piece, and the opening angle is 20 degrees. To 70 degrees.
  • the plurality of blades are arranged along a circumferential direction of the first thrust piece, and a part of the plurality of blades are inclined with respect to other portions of the first thrust piece in a first direction, the plurality of blades The remaining one of the blades is inclined with respect to the other portions of the first thrust piece in a second direction opposite to the first direction, the opening angle being 20 degrees to 70 degrees.
  • the blade and the opening corresponding to the blade are simultaneously formed by stamping the first thrust piece.
  • the thrust bearing has an inner thrust piece and an outer thrust piece, and the inner thrust piece or the outer thrust piece is formed with the plurality of blades and the plurality of openings, and the thrust bearing further includes a cage .
  • the rolling bodies are needle rollers.
  • the thrust bearing is used in a car air conditioner compressor or a car gearbox.
  • a plurality of blades (corresponding to the position of the oil feed gap of the thrust bearing) and a plurality of openings are formed on the first thrust piece, and the blade is inclined with respect to the other portions of the first thrust piece
  • the opening angle is such that lubricant and/or coolant are introduced into the oil feed gap through the opening as the first thrust piece rotates. In this way, a greater axial range of lubricant and/or coolant can be introduced into the oil inlet gap to improve lubrication and/or cooling of the thrust bearing.
  • oil inlet gap is used in this application, the “oil inlet gap” should be understood to allow any type and/or state of lubricant and/or coolant to enter the gap of the thrust bearing.
  • FIG. 1 is an axial sectional view showing a thrust bearing according to the related art.
  • Fig. 2 is a schematic view showing a mounted state of the thrust bearing of Fig. 1.
  • FIG 3 is an axial sectional view showing a thrust bearing according to an embodiment of the present invention.
  • FIG. 4 is a schematic view showing an opening angle of a blade of the thrust bearing of FIG. 3.
  • Fig. 5 is a perspective view showing an inner thrust piece of the thrust bearing of Fig. 3;
  • Fig. 6 is a schematic view showing a mounted state of the thrust bearing of Fig. 3.
  • Fig. 7 is a schematic view showing an operational state of the thrust bearing of Fig. 3.
  • the thrust bearing of this embodiment includes an outer thrust piece 1, an inner thrust piece 4, a retainer 2, and a rolling body 3, wherein the rolling body 3 may be a needle roller.
  • the thrust bearing of the present embodiment differs from the thrust bearing of FIGS. 1 and 2 mainly in that the inner thrust piece 4 has a blade structure, and the thrust bearing of the present embodiment will be mainly described below as the thrust bearing of FIGS. 1 and 2. At the office.
  • the outer thrust piece 4 of the thrust bearing of the present embodiment has an outer diameter larger than the outer diameter of the outer thrust piece 1.
  • the inner thrust piece 4 is generally annular in shape and includes a radially inner portion 40 and a radially outer portion 41.
  • a plurality of blades 42 and a plurality of openings 43 corresponding to the plurality of blades 42 are formed in the radially outer portion 41 of the inner thrust piece 4.
  • the inner thrust piece 4 includes a metal or metal alloy, and the blade 42 and the opening 43 are simultaneously formed by punching the radially outer portion 41 of the inner thrust piece 4.
  • the manner in which the blade 42 and the opening 43 are formed is not limited thereto.
  • the blade 42 may be attached by welding or the like in the vicinity of the opening 43.
  • the plurality of blades 42 are arranged along the circumferential direction of the inner thrust piece 4.
  • the root portion of the blade 42 connected to the other portion of the radially outer portion 41 of the inner thrust piece 4 extends substantially in the radial direction of the inner thrust piece 4.
  • the inclination direction of the surface (board surface) of the plurality of blades 42 with respect to the other portions of the inner thrust piece 4 is the same.
  • the opening angle a formed by the blade 42 with respect to the surface (plate surface) of the other portion of the inner thrust piece 4 may be in a suitably appropriate range. In one non-limiting example, the opening angle a is from about 20 degrees to about 70 degrees.
  • the blade 42 and the outer thrust piece 1 and the inner thrust piece 4 are viewed along the axial direction of the thrust bearing.
  • the gaps g at least partially overlap.
  • the radial dimension of the blade 42 is greater than the radial dimension of the gap g.
  • the thrust bearing of the present embodiment when the thrust bearing of the present embodiment is mounted between the first member 5 and the second member 6, preferably, the radially inner end of the vane 42 is radially opposite to the outer peripheral end surface 61 of the second member 6.
  • the outer peripheral end surface 61 of the second member 6 is not limited to a flat surface, and may include a step or the like.
  • the first member 5 and the second member 6 may be components of an automotive air conditioner compressor and an automobile gearbox.
  • the thrust bearing of the present invention employs an inner thrust piece 4 with a blade structure to enhance the lubrication of the thrust bearing.
  • the inner thrust piece 4 rotates in the direction R shown in Figs. 4 and 5, it faces the space between the blade 42 and the opening 43 (or against the inner surface 421 of the blade 42, i.e., the inner thrust piece 4 of the blade 42)
  • the resulting airflow causes the oil mist to pass through the opening 43 so that more oil droplets 7 enter the gap g and enter the raceway surface.
  • this structure also has the effect of enhancing oil flow.
  • the present invention adds a blade structure to the general flat thrust piece as an improvement.
  • the air pressure generated by the blades will help to create a better oil flow.
  • the generated air flow drives the oil mist through the opening at the blade to allow more oil droplets to enter the raceway surface. Therefore, it is advantageous to form an oil film on the raceway surface of the bearing and enhance the lubrication function.
  • blades are formed on the thrust piece, and the blades are used for active lubrication to enhance the oil flow.
  • the lubrication condition of the thrust bearing itself can be improved without changing the other components of the thrust bearing.
  • the rolling elements 3 are needle rollers.
  • the rolling bodies 3 may also be rollers or balls or the like.
  • the vane 42 and the opening 43 are formed in the inner thrust piece 4.
  • the blade 42 and the opening 43 may also be formed on the outer thrust piece 1. Whether the blade 42 and the opening 43 are formed in the inner thrust piece 4 or the outer thrust piece 1 mainly depends on the structure of the thrust bearing and the mounting environment of the thrust bearing. It should be understood that the vanes 42 and the opening 43 should be formed in the inner/outer thrust piece as a thrust piece to be rotated.
  • the thrust bearing includes an inner thrust piece and an outer thrust piece.
  • the structure of the present invention can also be applied to a thrust bearing having only one thrust piece.
  • the vane 42 and the opening 43 are formed in the radially outer portion of the inner thrust piece 4 of the thrust bearing.
  • the blade 42 and the opening 43 may also be formed at a position corresponding to the oil inlet gap of the radially inner portion of the inner (outer) thrust piece of the thrust bearing.
  • the blade 42 and the opening 43 are formed in the radially outer portion of the thrust piece or in the radially inner portion of the thrust piece, depending mainly on the structure of the thrust bearing (for example, the position of the oil inlet gap) and the installation environment of the thrust bearing.
  • the thrust bearing of the present invention is more advantageous in the case where the oil inlet gap is located radially outward of the thrust bearing.
  • the inclination directions of all the blades 42 with respect to the other portions of the inner thrust piece 4 are the same.
  • the inclination angles of the plurality of blades 42 may also be reversed, that is, the partial blades are inclined in the first direction, and the partial blades are inclined in the second direction opposite to the first direction.
  • This solution is particularly effective in the case where the direction of rotation of the inner thrust piece 4 may vary; alternatively, the same thrust piece can be used for bearings that rotate in different directions, which can improve the versatility of the components.
  • the thrust bearing of the present invention can be applied to any suitable occasion, and is not limited to automotive air conditioner compressors and automobile gearboxes.

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

Abstract

一种推力轴承，其包括至少一个推力片（1，4）和滚动体（3）。在所述至少一个推力片（1，4）中的第一推力片（1，4）上形成有多个叶片（42）和多个开口（43），所述叶片（42）相对于所述第一推力片（1，4）的其它部分倾斜一张开角度（a），以在所述第一推力片（1，4）转动时将润滑剂和/或冷却剂经由所述开口（43）引入所述推力轴承的进油间隙（g）中。在所述推力轴承中，可以将更大轴向范围的润滑剂和/或冷却剂引入到所述进油间隙（g）中，改善推力轴承的润滑和/或冷却。

Description

推力轴承
本申请要求于2016年11月16日提交的、申请号为201611010150.6、发明名称为“推力轴承”的中国发明专利申请的优先权。
技术领域
本发明涉及推力轴承，特别是改善了润滑的推力轴承。
背景技术
推力轴承是一种广泛应用于例如汽车空调压缩机和汽车变速箱的轴承。目前在例如汽车空调压缩机和汽车变速箱等应用中，轴承的润滑条件较差。
对于标准推力轴承设计，可以采用图1所示的结构。参照图1，该推力轴承包括外推力片1、内推力片4、保持架2和滚动体3。
如示出图1的推力轴承的一个安装状态的图2所示，推力轴承被安装在彼此相对的第一构件5和第二构件6之间，润滑油仅能通过内推力片4和外推力片1之间的间隙g进入轴承。如果系统采用被动式的油雾润滑方式，或者润滑油流动不充分，将会导致轴承滚道、即工作区域中无法形成有效的润滑油膜，导致轴承因为润滑不良而发生失效，从而减低轴承的使用寿命。
在推力轴承需要冷却的情况下，也存在冷却剂不能与滚动体充分地接触的问题。
发明内容
为解决上述问题而作出本发明，本发明的一个目的在于改善推力轴承的润滑和/或冷却。
本发明可以采用、但不限于下述方案。
一种推力轴承，其包括至少一个推力片和滚动体，其特征在于，在所述至少一个推力片中的第一推力片上形成有多个叶片和多个开口，所述叶片相对于所述第一推力片的其它部分倾斜一张开角度，以在所述第一推力片转动时将润滑剂和/或冷却剂经由所述开口引入所述推力轴承的进油间隙中。
优选地，所述第一推力片包括径向内侧部分和径向外侧部分，在所述径向外侧部分形成有所述多个叶片和所述多个开口。
优选地，沿所述推力轴承的轴向观察，所述叶片与所述进油间隙至少部分地重叠，所述叶片在所述推力轴承的径向上的尺寸大于所述进油间隙的径向尺寸。
优选地，所述叶片与所述第一推力片的其它部分连接的根部大致沿着所述第一推力片的径向延伸。
优选地，所述多个叶片沿着所述第一推力片的周向排列，所述多个叶片相对于所述第一推力片的其它部分的倾斜方向相同，所述张开角度为20度至70度。
优选地，所述多个叶片沿着所述第一推力片的周向排列，所述多个叶片中的部分叶片沿第一方向相对于所述第一推力片的其它部分倾斜，所述多个叶片中的剩余叶片沿与所述第一方向相反的第二方向相对于所述第一推力片的其它部分倾斜，所述张开角度为20度至70度。
优选地，通过对所述第一推力片进行冲压而同时形成叶片和与该叶片对应的开口。
优选地，所述推力轴承具有内推力片和外推力片，在所述内推力片或所述外推力片形成有所述多个叶片和所述多个开口，所述推力轴承还包括保持架。
优选地，所述滚动体为滚针。
优选地，所述推力轴承用于汽车空调压缩机或汽车变速箱。
在本发明的推力轴承中，在第一推力片上形成有(与所述推力轴承的进油间隙位置对应的)多个叶片和多个开口，叶片相对于第一推力片的其它部分倾斜一张开角度，以在第一推力片转动时将润滑剂和/或冷却剂经由所述开口引入进油间隙中。这样，可以将更大轴向范围的润滑剂和/或冷却剂引入到所述进油间隙中，改善推力轴承的润滑和/或冷却。
应当理解，虽然本申请中使用了“进油间隙”一词，但是，该“进油间隙”应当被理解为允许任何类型和/或状态的润滑剂和/或冷却剂进入推力轴承的间隙。
附图说明
图1是示出根据现有技术的推力轴承的轴向截面图。
图2是示出图1的推力轴承的一个安装状态的示意图。
图3是示出根据本发明的一个实施方式的推力轴承的轴向截面图。
图4是示出图3的推力轴承的叶片的张开角度的示意图。
图5是示出图3的推力轴承的内推力片的立体图。
图6是示出图3的推力轴承的一个安装状态的示意图。
图7是示出图3的推力轴承的工作状态的示意图。
附图标记列表
1外推力片，2保持架，3滚动体，4内推力片，g间隙，5第一构件，6第二构件，40内推力片的径向内侧部分，41内推力片的径向外侧部分，42叶片，421叶片的内表面，43开口，R内推力片的转动方向，a张开角度，61第二构件的外周端面，7油滴
具体实施方式
下面参照附图描述本发明的示例性实施方式。应当理解，这些具体的说明仅用于示教本领域技术人员如何实施本发明，而不用于穷举本发明的所有可行的方式，也不用于限制本发明的范围。
下面参照图3-7说明根据本发明的一个实施方式的推力轴承。该实施方式的推力轴承包括外推力片1、内推力片4、保持架2和滚动体3，其中，滚动体3可以为滚针。本实施方式的推力轴承与图1和2的推力轴承的不同之处主要在于内推力片4带有叶片结构，下面将主要说明本实施方式的推力轴承与图1和2的推力轴承的不同之处。
本实施方式的推力轴承的内推力片4的外径大于外推力片1的外径。内推力片4整体上为大致环状，并包括径向内侧部分40和径向外侧部分41。在内推力片4的径向外侧部分41形成有多个叶片42和与该多个叶片42对应的多个开口43。
在一个非限制性的示例中，内推力片4包括金属或金属合金，通过对内推力片4的径向外侧部分41进行冲压而同时形成叶片42和开口43。当然，叶片42和开口43的形成方式不限于此。例如，可以在开口43附近通过焊接等方式附接叶片42。
多个叶片42沿着内推力片4的周向排列。叶片42与内推力片4的径向外侧部分41的其它部分连接的根部大致沿着内推力片4的径向延伸。多个叶片42相对于内推力片4的其它部分的表面(板面)的倾斜方向相同。如图4和5所示，叶片42相对于内推力片4的其它部分的表面(板面)形成的张开角度a可以在适意适当的范围。在一个非限制性的示例中，该张开角度a为大约20度至大约70度。
参照图3，沿推力轴承的轴向观察，叶片42与外推力片1和内推力片4之 间的间隙g至少部分地重叠。优选地，叶片42的径向尺寸大于间隙g的径向尺寸。
参照图6-7，在本实施方式的推力轴承安装于第一构件5和第二构件6之间时，优选地，叶片42的径向内端比第二构件6的外周端面61靠径向外侧。当然，第二构件6的外周端面61不限于平面，也可以包括台阶等。第一构件5和第二构件6可以为汽车空调压缩机和汽车变速箱的构件。
下面简单说明本实施方式的推力轴承的动作和效果。
本发明的推力轴承采用了带叶片结构的内推力片4来加强推力轴承的润滑。随着内推力片4沿图4和5所示的方向R旋转，迎着叶片42和开口43之间的空间(或者说迎着叶片42的内表面421、即叶片42的靠近内推力片4的表面)而来的气流带动油雾通过开口43，以使较多的油滴7进入间隙g，进而进入滚道面。对于浸油润滑，该结构也有加强油液流动的作用。
本发明在一般的平的推力片上增加了叶片结构作为改良。由叶片产生的气压会有助于形成更好的油流。对于油雾润滑，随着推力片的旋转，产生的气流带动油雾通过叶片处的开口，以使较多的油滴进入滚道面。从而有利于轴承滚道面形成油膜，增强润滑功能。
在本发明的推力轴承中，推力片上形成有叶片，利用叶片进行主动润滑，增强了油流。在不改变推力轴承的其他组件的情况下，可以改善推力轴承自身的润滑条件。
应当理解，上述实施方式仅是示例性的，不用于限制本发明。本领域技术人员可以在本发明的教导下对上述实施方式作出各种变型和改变，而不脱离本发明的范围。
(1)在上述实施方式中，滚动体3为滚针。然而，滚动体3还可以是滚柱或球等。
(2)在上述实施方式中，叶片42和开口43形成于内推力片4。然而，叶片42和开口43还可以形成于外推力片1。叶片42和开口43是形成于内推力片4还是形成于外推力片1主要取决于推力轴承的结构和该推力轴承的安装环境。应当理解，叶片42和开口43应当形成于内/外推力片中的将转动的一个推力片。
(3)在上述实施方式中，推力轴承包括内推力片和外推力片。然而，本发明的结构还可以应用于具有仅一个推力片的推力轴承。
(4)在上述实施方式中，叶片42和开口43形成于推力轴承的内推力片4的径向外侧部分。然而，叶片42和开口43还可以形成于推力轴承的内(外)推力片的径向内侧部分的与进油间隙对应的位置。叶片42和开口43是形成于推力片的径向外侧部分还是形成于推力片的径向内侧部分，主要取决于推力轴承的结构(例如，进油间隙的位置)和该推力轴承的安装环境。
由于推力轴承转动过程中油雾或油滴会受到离心力，因而，在进油间隙处于推力轴承的径向外侧的情况下，轴承的润滑更困难。所以，对于进油间隙位于推力轴承的径向外侧的情况，本发明的推力轴承更具优势。
(5)在上述实施方式中，所有叶片42相对于内推力片4的其它部分的倾斜方向均相同。然而，多个叶片42的倾斜角度也可以相反，即部分叶片沿第一方向倾斜，部分叶片沿与所述第一方向相反的第二方向倾斜。在内推力片4的转动方向可能变化的情况下，该方案特别有效；或者，同一推力片可以用于沿不同方向转动的轴承，这样可以提高部件的通用性。
(6)在上述实施方式中，说明了通过叶片将油雾或油滴引入到进油间隙中。然而，本发明的结构对于任何类型的润滑剂或冷却剂均具有效果。
(7)本发明的推力轴承可以应用于任何适当的场合，而不限于汽车空调压缩机和汽车变速箱。

Claims (10)

  1. 一种推力轴承，其包括至少一个推力片和滚动体，其特征在于，
    在所述至少一个推力片中的第一推力片上形成有多个叶片和多个开口，所述叶片相对于所述第一推力片的其它部分倾斜一张开角度，以在所述第一推力片转动时将润滑剂和/或冷却剂经由所述开口引入所述推力轴承的进油间隙中。
  2. 根据权利要求1所述的推力轴承，其特征在于，
    所述第一推力片包括径向内侧部分和径向外侧部分，在所述径向外侧部分形成有所述多个叶片和所述多个开口。
  3. 根据权利要求1或2所述的推力轴承，其特征在于，
    沿所述推力轴承的轴向观察，所述叶片与所述进油间隙至少部分地重叠，
    所述叶片在所述推力轴承的径向上的尺寸大于所述进油间隙的径向尺寸。
  4. 根据权利要求1或2所述的推力轴承，其特征在于，
    所述叶片与所述第一推力片的其它部分连接的根部大致沿着所述第一推力片的径向延伸。
  5. 根据权利要求1或2所述的推力轴承，其特征在于，
    所述多个叶片沿着所述第一推力片的周向排列，
    所述多个叶片相对于所述第一推力片的其它部分的倾斜方向相同，
    所述张开角度为20度至70度。
  6. 根据权利要求1或2所述的推力轴承，其特征在于，
    所述多个叶片沿着所述第一推力片的周向排列，
    所述多个叶片中的部分叶片沿第一方向相对于所述第一推力片的其它部分倾斜，所述多个叶片中的剩余叶片沿与所述第一方向相反的第二方向相 对于所述第一推力片的其它部分倾斜，
    所述张开角度为20度至70度。
  7. 根据权利要求1或2所述的推力轴承，其特征在于，
    通过对所述第一推力片进行冲压而同时形成叶片和与该叶片对应的开口。
  8. 根据权利要求1或2所述的推力轴承，其特征在于，
    所述推力轴承具有内推力片和外推力片，在所述内推力片或所述外推力片形成有所述多个叶片和所述多个开口，
    所述推力轴承还包括保持架。
  9. 根据权利要求1或2所述的推力轴承，其特征在于，
    所述滚动体为滚针。
  10. 根据权利要求1或2所述的推力轴承，其特征在于，
    所述推力轴承用于汽车空调压缩机或汽车变速箱。
PCT/CN2017/110964 2016-11-16 2017-11-14 推力轴承 Ceased WO2018090915A1 (zh)

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JP2001041252A (ja) * 1999-07-26 2001-02-13 Nsk Ltd スラストころ軸受
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US20230095344A1 (en) * 2021-09-30 2023-03-30 Aktiebolaget Skf Rolling-element bearing
US12234862B2 (en) * 2021-09-30 2025-02-25 Aktiebolaget Skf Rolling-element bearing

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