WO2024119324A1 - 轴承 - Google Patents

轴承 Download PDF

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Publication number
WO2024119324A1
WO2024119324A1 PCT/CN2022/136665 CN2022136665W WO2024119324A1 WO 2024119324 A1 WO2024119324 A1 WO 2024119324A1 CN 2022136665 W CN2022136665 W CN 2022136665W WO 2024119324 A1 WO2024119324 A1 WO 2024119324A1
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WO
WIPO (PCT)
Prior art keywords
extension
radial outer
main body
contour line
extension section
Prior art date
Application number
PCT/CN2022/136665
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English (en)
French (fr)
Inventor
程涛
刘际轩
沃尔夫·席蒙
勾稻·罗伯特
特罗特莱·托比亚斯
Original Assignee
舍弗勒技术股份两合公司
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Application filed by 舍弗勒技术股份两合公司 filed Critical 舍弗勒技术股份两合公司
Priority to PCT/CN2022/136665 priority Critical patent/WO2024119324A1/zh
Publication of WO2024119324A1 publication Critical patent/WO2024119324A1/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
    • 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
    • F16C19/28—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 two or more rows of rollers
    • 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
    • F16C33/49—Cages for rollers or needles comb-shaped

Definitions

  • the present application relates to the technical field of bearings, and more specifically, to an easy-to-assemble bearing.
  • the bearing includes an outer ring 1 ', an inner ring 3', a retainer 4' and rolling elements 2'.
  • the retainer 1' is prone to damage the surface of the rolling element 2' when the rolling element 2' is inserted into the pocket of the retainer 1'.
  • the risk of damage to the rolling element 2' can be reduced by reducing the height of the outer rib of the inner ring, or by milling additional mounting grooves on the outer rib of the inner ring to facilitate the installation of the rolling element 2' and avoid damage to the rolling element 2'.
  • the risk of damage to the rolling element 2' is reduced by reducing the height of the outer rib of the inner ring, the risk of the rolling element 2' falling after assembly is increased due to the reduction in the height of the outer rib of the inner ring; if the mounting grooves are milled on the outer rib of the inner ring to facilitate the installation of the rolling element 2', all the rolling elements 2' need to pass through the mounting grooves to be installed in the cage pockets, which greatly affects the assembly efficiency.
  • the purpose of the present application is to provide a bearing that can make it easier for rolling elements to be installed into cage pockets and reduce the risk of damage to the rolling elements during assembly.
  • the present application provides a bearing, comprising an outer ring, an inner ring, a rolling element and a cage, wherein the cage comprises:
  • a plurality of extensions are provided on the side of the main body, and a portion of the main body between adjacent extensions forms a pocket for accommodating a rolling body;
  • the extension portion includes a first extension segment and a second extension segment, the first extension segment is connected to the main body portion, and the second extension segment is connected to the first extension segment, and the radial outer surfaces of the first extension segment and the second extension segment both shrink in the direction away from the main body portion toward the center of the retaining frame.
  • the contour line of the radial outer surface of the first extension segment is a curve or a straight line
  • the contour line of the radial outer surface of the second extension segment is a curve or a straight line
  • the contour line of the radial outer surface of the first extension segment and the contour line of the radial outer surface of the second extension segment form a complete curve.
  • the endpoint of the contour line of the radial outer surface of the main body away from the extension portion is P1'
  • the intersection point of the contour line of the radial outer surface of the main body and the contour line of the radial outer surface of the first extension segment is P2'
  • the intersection point of the contour line of the radial outer surface of the first extension segment and the contour line of the radial outer surface of the second extension segment is P3'
  • the endpoint of the contour line of the radial outer surface of the second extension segment away from the main body is P4'
  • the angle formed by the line connecting P2' and P3' and the contour line of the radial outer surface of the main body is smaller than the angle formed by the line connecting P3' and P4' and the contour line of the radial outer surface of the main body.
  • the extension portion also includes a third extension segment, which is connected to the second extension segment, and the radial outer surface of the third extension segment shrinks from the end of the second extension segment in a direction away from the main body toward a direction close to the center of the retaining frame.
  • the contour line of the radial outer surface of the first extension segment is a curve or a straight line
  • the contour line of the radial outer surface of the second extension segment is a curve or a straight line
  • the contour line of the radial outer surface of the third extension segment is a curve or a straight line.
  • the contour line of the radial outer surface of the first extension segment, the contour line of the radial outer surface of the second extension segment, and the contour line of the radial outer surface of the third extension segment form a complete curve.
  • the extension parts are provided on both side surfaces of the main body.
  • the midpoint of the contour line of the radial outer surface of the main body is P1, on any side, the intersection point of the contour line of the radial outer surface of the main body and the contour line of the radial outer surface of the first extension segment is P2, the intersection point of the contour line of the radial outer surface of the first extension segment and the contour line of the radial outer surface of the second extension segment is P3, and the endpoint of the contour line of the radial outer surface of the second extension segment away from the main body is P4,
  • the angle formed by the line connecting P2 and P3 and the contour line of the radial outer surface of the main body is smaller than the angle formed by the line connecting P3 and P4 and the contour line of the radial outer surface of the main body.
  • the extension portion includes a first extension section and a second extension section.
  • the radial outer surfaces of the first extension section and the second extension section both shrink in the direction away from the main body portion toward the center of the retainer, effectively reducing the material of the radial outer surface of the retainer at the end face of the extension portion, making it easier to load the rolling elements into the retainer pockets and effectively reducing the risk of damage caused during the assembly of the rolling elements.
  • as much material as possible is retained in other positions of the retainer to avoid affecting the strength of the retainer.
  • FIG1 is a structural diagram of a bearing in the prior art
  • FIG2 is a structural diagram of a bearing in an embodiment of the present application.
  • FIG3 is an enlarged view of the retainer in the embodiment of the present application.
  • FIG. 4 is an enlarged view of a retaining frame in another embodiment of the present application.
  • an embodiment of the present application provides a bearing, which includes an outer ring 1, an inner ring 3, rolling elements 2 and a retaining frame 4.
  • the retaining frame 4 includes a main body 41 and a plurality of extension portions 42 extending from the main body 41.
  • the main body 41 and the extension portions 42 are made of the same material, and optionally, the main body 41 and the extension portions 42 are integrally arranged, that is, the retaining frame 4 is an integrated structure.
  • the main body 41 is the main body of the retainer 4, and the main body 41 is annular.
  • a plurality of extensions 42 are arranged on the side of the main body 41, that is, the plurality of extensions 42 extend outward from the side of the main body 41, and here, the plurality of extensions 42 extend outward from the side of the main body 41 along the axial direction, and the adjacent extensions 42 and the part of the main body 41 therebetween form pockets for accommodating the rolling bodies 2, and the rolling bodies 2 are installed in the pockets, and the retainer 4 is used to retain the rolling bodies 2 in the pockets.
  • the retainer 4 and the rolling bodies 2 are arranged between the inner ring 3 and the outer ring 1.
  • the extension portion 42 includes a first extension section 421 and a second extension section 422, wherein the first extension section 421 is connected to the main body 41, and the second extension section 422 is connected to the first extension section 421, and the radial outer surfaces of the first extension section 421 and the second extension section 422 are both contracted in the direction away from the main body 41 toward the center of the retainer 4. That is, the extension portion 42 is provided in sections, the first extension section 421 and the second extension section 422 are provided as a whole, one end of the first extension section 421 is connected to the main body 41, and the other end is connected to the second extension section 422. One end of the second extension section 422 is connected to the first extension section 421, and the other end is a suspended end.
  • the radial outer surface of the retainer 4 is composed of three sections of contours, namely the main body 41, the first extension section 421 and the second extension section 422.
  • the radial outer surface of the main body 41 is a cylindrical surface.
  • the radial outer surfaces of the first extension section 421 and the second extension section 422 shrink in the direction away from the main body 41 toward the center of the retainer 4, so that the radial outer surface of the extension section 42 has a tendency to reduce in diameter in the axial direction.
  • the radial outer surface of the main body 41 is a cylindrical surface, and of course, it can also be a conical surface or a curved surface with a certain slope.
  • the radial outer surface of the first extension section 421 shrinks in the direction away from the main body 41 toward the center of the retainer 4 relative to the radial outer surface of the main body 41.
  • the extension portion 42 of the retainer 4 includes a first extension section 421 and a second extension section 422.
  • the radial outer surfaces of the first extension section 421 and the second extension section 422 shrink in the direction away from the main body 41 toward the center of the retainer 4, effectively reducing the material of the radial outer surface of the retainer 4 near the end face of the extension section 42.
  • the rolling element 2 can be more easily loaded into the pocket of the retainer 4, and the risk of damage caused by the rolling element 2 during the assembly process can be effectively reduced.
  • as much material as possible is retained in other positions of the retainer 4 to avoid affecting the strength of the retainer 4.
  • the bearing of the embodiment of the present application can reduce the risk of the rolling element 2 falling out of the pocket of the retainer 4 while avoiding damage to the rolling element 2 during the process of loading the retainer 4.
  • the contour line of the radial outer surface of the first extension section 421 is a curve or a straight line
  • the contour line of the radial outer surface of the second extension section 422 is a curve or a straight line.
  • the contour line of the radial outer surface of the first extension section 421 is a straight line
  • the contour line of the radial outer surface of the second extension section 422 is a straight line, that is, the radial outer surface of the first extension section 421 and the radial outer surface of the second extension section 422 are conical surfaces that shrink toward the center of the retainer 4, but the inclination degrees of the two sections are different, and the second extension section 422 is more inclined toward the center of the retainer 4.
  • the contour line of the radial outer surface of the first extension section 421 and the contour line of the radial outer surface of the second extension section 422 form a complete curve. In this way, the radial outer surface of the first extension section 421 and the radial outer surface of the second extension section 422 can transition more smoothly.
  • the extension portion 42 may be provided on only one side surface of the main body portion 41 , and in this case, the retaining frame 4 is a single-row retaining frame, refer to FIG. 3 .
  • the endpoint of the contour line of the radial outer surface of the main body portion 41 away from the extension portion 42 is P1'
  • the intersection point of the contour line of the radial outer surface of the main body portion 41 and the contour line of the radial outer surface of the first extension segment 421 is P2'
  • the intersection point of the contour line of the radial outer surface of the first extension segment 421 and the contour line of the radial outer surface of the second extension segment 422 is P3'
  • the endpoint of the contour line of the radial outer surface of the second extension segment 422 away from the main body 41 is P4'.
  • the angle formed by the line connecting P2' and P3' and the contour line of the radial outer surface of the main body 41 is smaller than the angle formed by the line connecting P3' and P4' and the contour line of the radial outer surface of the main body 41.
  • the angle formed by the line connecting P2' and P3' and the contour line of the radial outer surface of the main body 41 is ⁇ '
  • the angle formed by the line connecting P3' and P4' and the contour line of the radial outer surface of the main body 41 is ⁇ ', ⁇ ' ⁇ ', that is, the second extension section 422 has a greater tendency to shrink toward the center of the retainer 4.
  • the center of the cage 4 and P2' form an envelope circle
  • P1', P3' and P4' are all located within the envelope circle.
  • the center of the cage 4 and P2' form an envelope circle with a radius of R
  • P1', P3' and P4' are all located within the envelope circle with a radius of R, which facilitates the assembly of the cage 4 in the outer ring 1.
  • the extension portion 42 also includes a third extension segment, the third extension segment is connected to the second extension segment 422, and the radial outer surface of the third extension segment shrinks from the end of the second extension segment 422 in the direction away from the main body 41 to the direction close to the center of the retainer 4. That is, the extension portion 42 includes the first extension segment 421, the second extension segment 422 and the third extension segment, the first extension segment 421, the second extension segment 422 and the third extension segment are integrally arranged, one end of the first extension segment 421 is connected to the main body 41, and the other end is connected to the second extension segment 422. One end of the second extension segment 422 is connected to the first extension segment 421, and the other end is connected to the third extension segment. One end of the third extension segment is connected to the second extension segment 422, and the other end is a suspended end.
  • the radial outer surface of the retaining frame 4 is composed of four contours, namely the main body 41, the first extension segment 421, the second extension segment 422 and the third extension segment.
  • the radial outer surfaces of the first extension segment 421, the second extension segment 422 and the third extension segment all shrink in the direction away from the main body 41 toward the center of the retaining frame 4, so that the radial outer surface of the extension portion 42 tends to decrease in diameter in the axial direction.
  • the extension portion 42 of the retainer 4 includes a first extension section 421, a second extension section 422 and a third extension section.
  • the radial outer surfaces of the first extension section 421, the second extension section 422 and the third extension section shrink in the direction away from the main body 41 toward the center of the retainer 4, further effectively reducing the material at the end surface of the radial outer surface of the retainer 4 close to the extension section 42.
  • the rolling element 2 can be more easily installed into the pocket of the retainer 4, and the risk of damage caused by the rolling element 2 during the assembly process can be effectively reduced.
  • as much material as possible is retained in other positions of the retainer 4 to avoid affecting the strength of the retainer 4.
  • the bearing of the embodiment of the present application can reduce the risk of the rolling element 2 falling out of the pocket of the retainer 4 while avoiding damage to the rolling element 2 during the installation process of the retainer 4.
  • the contour line of the radial outer surface of the first extension section 421 is a curve or a straight line
  • the contour line of the radial outer surface of the second extension section 422 is a curve or a straight line
  • the contour line of the radial outer surface of the third extension section is a curve or a straight line.
  • the contour line of the radial outer surface of the first extension section 421, the contour line of the radial outer surface of the second extension section 422 and the contour line of the radial outer surface of the third extension section are a complete curve. In this way, the radial outer surface of the first extension section 421, the radial outer surface of the second extension section 422 and the radial outer surface of the third extension section can transition more smoothly.
  • the radial outer surfaces of the first extension section 421, the second extension section 422 and the third extension section have a tendency to shrink in a direction close to the center of the cage 4. This further effectively reduces the material at the end surface of the radial outer surface of the cage 4 close to the extension portion 42, making it easier to fit the rolling element 2 into the pocket of the cage 4 and effectively reducing the risk of damage to the rolling element 2 during assembly. At the same time, as much material as possible is retained at other positions of the cage 4 to avoid affecting the strength of the cage 4.
  • extension portions 42 may be provided on both sides of the main body 41.
  • the retainer 4 is a double-row retainer, as shown in FIG4.
  • a plurality of extension portions 42 are provided on one side of the main body 41, and a plurality of extension portions 42 are provided on the other opposite side of the main body 41.
  • the two groups of extension portions 42 share the main body 41.
  • extension portions 42 are provided on both side surfaces of the main body 41, the midpoint of the contour line of the radial outer surface of the main body 41 is P1, and on any side surface, the intersection point of the contour line of the radial outer surface of the main body 41 and the contour line of the radial outer surface of the first extension section 421 is P2, the intersection point of the contour line of the radial outer surface of the first extension section 421 and the contour line of the radial outer surface of the second extension section 422 is P3, and the endpoint of the contour line of the radial outer surface of the second extension section 422 away from the main body 41 is P4.
  • the angle formed by the line connecting P2 and P3 and the contour line of the radial outer surface of the main body 41 is smaller than the angle formed by the line connecting P3 and P4 and the contour line of the radial outer surface of the main body 41.
  • the angle formed by the line connecting P2 and P3 and the contour line of the radial outer surface of the main body 41 is ⁇
  • the angle formed by the line connecting P3 and P4 and the contour line of the radial outer surface of the main body 41 is ⁇ , ⁇ , that is, the second extension section 422 has a greater tendency to shrink toward the center of the retainer 4.
  • P1, P3 and P4 are all located within the envelope circle.
  • the center of the cage 4 and P2 form an envelope circle with a radius of R
  • P1, P3 and P4 are all located within the envelope circle with a radius of R, which facilitates the assembly of the cage 4 in the outer ring 1.
  • the bearing in the embodiment of the present application may be a spherical roller bearing, or may be other types of bearings that require a retaining frame 4 to mount the rolling element 2 .

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

Abstract

本申请提供了一种轴承，包括外圈、内圈、滚动体以及保持架，其中，保持架包括主体部和多个延伸部，主体部为环状；多个延伸部设于主体部的侧面，并且相邻延伸部与其之间的部分主体部形成用于容置滚动体的兜孔；延伸部包括第一延伸段和第二延伸段，第一延伸段与主体部相接，第二延伸段与第一延伸段相接，第一延伸段和第二延伸段的径向外表面在远离主体部的方向均向靠近保持架的中心的方向收缩。采用本申请的轴承，减少了保持架的径向外表面靠近延伸部的端面处的材料，能使滚动体更容易装入到保持架兜孔内，并有效降低滚动体装配过程中造成的损伤风险，同时，还尽可能多的保留保持架其他位置的材料，避免影响保持架的强度。

Description

轴承 技术领域
本申请涉及轴承的技术领域。更具体地，本申请涉及一种易装配的轴承。
背景技术
如图1所示，轴承包括外圈1'、内圈3'、保持架4'以及滚动体2'，在轴承装配过程中，由于内圈外挡边的限制以及保持架1'的材料特点，保持架1'容易在滚动体2'插入到保持架1'的兜孔的过程中对滚动体2'表面造成损伤。
可以通过减小内圈外挡边的高度来降低滚动体2'损伤的风险，也可以通过在内圈外挡边上铣削额外的安装槽，方便滚动体2'的装入，同时避免滚动体2'损伤。但是如果通过减少内圈外挡边的高度来降低滚动体2'损伤的风险，由于内圈外挡边的高度降低，增大了滚动体2'在装配完后掉落的风险；如果通过在内圈外挡边铣削安装槽方便滚动体2'的装入，所有的滚动体2'都需要通过安装槽才能装入保持架兜孔，很大程度上影响了装配效率。
发明内容
本申请的目的在于提供能够使滚动体更容易装入到保持架兜孔内，并降低滚动体装配过程中造成的损伤风险的轴承。
本申请提供了一种轴承，包括外圈、内圈、滚动体以及保持架，其中，所述保持架包括：
主体部，其为环状；以及
多个延伸部，其设于所述主体部的侧面，并且相邻所述延伸部与其之间的部分所述主体部形成用于容置滚动体的兜孔；
其中，所述延伸部包括第一延伸段和第二延伸段，所述第一延伸段与所述主体部相接，所述第二延伸段与所述第一延伸段相接，所述第一延伸段和所述第二延伸段的径向外表面在远离所述主体部的方向均向靠近所述保持架的中心的方向收缩。
根据本申请实施例，在同一径向截面上，所述第一延伸段的径向外表面的轮廓线为曲线或直线，所述第二延伸段的径向外表面的轮廓线为曲线或直线。
根据本申请实施例，所述第一延伸段的径向外表面的轮廓线与所述第二延伸段的径向外表面的轮廓线为一段完整的曲线。
根据本申请实施例，所述主体部的径向外表面的轮廓线远离所述延伸部的端点为P1'，所述主体部的径向外表面的轮廓线与所述第一延伸段的径向外表面的轮廓线的交点为P2'，所述第一延伸段的径向外表面的轮廓线与所述第二延伸段的径向外表面的轮廓线的交点为P3'，所述第二延伸段的径向外表面的轮廓线远离所述主体部的端点为P4'，
其中，P2'和P3'的连线与所述主体部的径向外表面的轮廓线形成的夹角小于P3'和P4'的连线与所述主体部的径向外表面的轮廓线形成的夹角。
根据本申请实施例，在由所述保持架的中心和P2'形成包络圆的情况下，P1'、P3'和P4'都位于所述包络圆之内。
根据本申请实施例，所述延伸部还包括第三延伸段，所述第三延伸段与所述第二延伸段相接，所述第三延伸段的径向外表面由第二延伸段的末端在远离所述主体部的方向向靠近所述保持架的中心的方向收缩。
根据本申请实施例，在同一径向截面上，所述第一延伸段的径向外表面的轮廓线为曲线或直线，所述第二延伸段的径向外表面的轮廓线为曲线或直线，所述第三延伸段的径向外表面的轮廓线为曲线或直线。
根据本申请实施例，所述第一延伸段的径向外表面的轮廓线、所述第二延伸段的径向外表面的轮廓线与所述第三延伸段的径向外表面的轮廓线为一段完整的曲线。
根据本申请实施例，所述主体部的两个侧面均设有所述延伸部。
根据本申请实施例，所述主体部的径向外表面的轮廓线的中点为P1， 在任一侧面，所述主体部的径向外表面的轮廓线与所述第一延伸段的径向外表面的轮廓线的交点为P2，所述第一延伸段的径向外表面的轮廓线与所述第二延伸段的径向外表面的轮廓线的交点为P3，所述第二延伸段的径向外表面的轮廓线远离所述主体部的端点为P4，
其中，P2和P3的连线与所述主体部的径向外表面的轮廓线形成的夹角小于P3和P4的连线与所述主体部的径向外表面的轮廓线形成的夹角。
在本申请的轴承中，延伸部包括第一延伸段和第二延伸段，第一延伸段和第二延伸段的径向外表面在远离主体部的方向均向靠近保持架的中心的方向收缩，有效减少了保持架的径向外表面靠近延伸部的端面处的材料，能使滚动体更容易装入到保持架兜孔内，并有效降低滚动体装配过程中造成的损伤风险，同时，还尽可能多的保留保持架其他位置的材料，避免影响保持架的强度。
附图说明
图1为现有技术中轴承的结构图；
图2为本申请实施例中轴承的结构图；
图3为本申请实施例中保持架的放大图；
图4为本申请另一实施例中保持架的放大图。
具体实施方式
以下将结合附图描述根据本申请的具体实施方式。下面的详细描述和附图用于示例性地说明本申请的原理，本申请不限于所描述的优选实施例，本申请的保护范围由权利要求书限定。
如图2-4所示，本申请实施例提供一种轴承，轴承包括外圈1、内圈3、滚动体2以及保持架4，该保持架4包括主体部41和从主体部41延伸的多个延伸部42，主体部41和延伸部42采用相同的材料制成，并且可选地，主体部41和延伸部42一体设置，也就是，保持架4为一体式结构。
主体部41为保持架4的主体，该主体部41为环状。多个延伸部42设于主体部41的侧面，也就是，多个延伸部42从主体部41的侧面向外延 伸，此处，多个延伸部42是从主体部41的沿轴向的侧面向外延伸，并且相邻延伸部42与其之间的部分主体部41形成用于容置滚动体2的兜孔，滚动体2安装在兜孔之内，保持架4用于保持兜孔之内的滚动体2。保持架4和滚动体2设于内圈3和外圈1之间。
其中，延伸部42包括第一延伸段421和第二延伸段422，第一延伸段421与主体部41相接，第二延伸段422与第一延伸段421相接，第一延伸段421和第二延伸段422的径向外表面在远离主体部41的方向均向靠近保持架4的中心的方向收缩。也就是，延伸部42是分段设置的，第一延伸段421和第二延伸段422一体设置，第一延伸段421的一端与主体部41相接，另一端与第二延伸段422相接。第二延伸段422的一端与第一延伸段421相接，另一端是悬空的末端。
也就是，保持架4的径向外表面由三段轮廓组成，分别为主体部41、第一延伸段421和第二延伸段422，主体部41的径向外表面为圆柱面，第一延伸段421和第二延伸段422的径向外表面在远离主体部41的方向均向靠近保持架4的中心的方向收缩，使得延伸部42径向外表面在轴向上有直径减小的趋势。在一个示例中，主体部41的径向外表面为圆柱面，当然，也可以为具有一定斜度的锥面或曲面，第一延伸段421的径向外表面在远离主体部41的方向相对于主体部41的径向外表面向保持架4的中心方向收缩。
采用本申请实施例的轴承，保持架4的延伸部42包括第一延伸段421和第二延伸段422，第一延伸段421和第二延伸段422的径向外表面在远离主体部41的方向均向靠近保持架4的中心的方向收缩，有效减少了保持架4的径向外表面靠近延伸部42的端面处的材料，在轴承装配过程中，能使滚动体2更容易装入到保持架4兜孔内，并有效降低滚动体2装配过程中造成的损伤风险，同时，还尽可能多的保留保持架4其他位置的材料，避免影响保持架4的强度。并且采用本申请实施例的轴承，可以在避免滚动体2装入保持架4过程中损伤的同时，减小滚动体2从保持架4兜孔中掉出的风险。而且，不用铣削额外的安装槽，装配便捷，提高装配效率。
在同一径向截面上，第一延伸段421的径向外表面的轮廓线为曲线或直线，第二延伸段422的径向外表面的轮廓线为曲线或直线。如图3和图4所示，第一延伸段421的径向外表面的轮廓线为直线，第二延伸段422的径向外表面的轮廓线为直线，也就是，第一延伸段421的径向外表面和第二延伸段422的径向外表面为向靠近保持架4的中心的方向收缩的锥形面，但是两段的倾斜程度不同，第二延伸段422向保持架4的中心倾斜的程度更大。
第一延伸段421的径向外表面的轮廓线与第二延伸段422的径向外表面的轮廓线为一段完整的曲线。这样，第一延伸段421的径向外表面和第二延伸段422的径向外表面可以更平滑地过渡。
本申请实施例中，可以仅在主体部41的一个侧面设置延伸部42，此时的保持架4为单列保持架，参考图3。
在仅在主体部41的一个侧面设置延伸部42的情况下，主体部41的径向外表面的轮廓线远离延伸部42的端点为P1'，主体部41的径向外表面的轮廓线与第一延伸段421的径向外表面的轮廓线的交点为P2'，第一延伸段421的径向外表面的轮廓线与第二延伸段422的径向外表面的轮廓线的交点为P3'，第二延伸段422的径向外表面的轮廓线远离主体部41的端点为P4'。
其中，P2'和P3'的连线与主体部41的径向外表面的轮廓线形成的夹角小于P3'和P4'的连线与主体部41的径向外表面的轮廓线形成的夹角。如图3所示，P2'和P3'的连线与主体部41的径向外表面的轮廓线形成的夹角为α'，P3'和P4'的连线与主体部41的径向外表面的轮廓线形成的夹角为β'，α'<β'，也就是第二延伸段422向靠近保持架4的中心的方向收缩的趋势更大。
在由保持架4的中心和P2'形成包络圆的情况下，P1'、P3'和P4'都位于包络圆之内。如图3所示，由保持架4的中心和P2'形成半径为R的包络圆，P1'、P3'和P4'都位于该半径为R的包络圆之内，便于保持架4在外圈1内的装配。
进一步地，延伸部42还包括第三延伸段，第三延伸段与第二延伸段 422相接，第三延伸段的径向外表面由第二延伸段422的末端在远离主体部41的方向向靠近保持架4的中心的方向收缩。也就是，延伸部42包括第一延伸段421、第二延伸段422和第三延伸段，第一延伸段421、第二延伸段422和第三延伸段一体设置，第一延伸段421的一端与主体部41相接，另一端与第二延伸段422相接。第二延伸段422的一端与第一延伸段421相接，另一端与第三延伸段相接。第三延伸段的一端与第二延伸段422相接，另一端为悬空的末端。
也就是，保持架4的径向外表面由四段轮廓组成，分别为主体部41、第一延伸段421、第二延伸段422和第三延伸段，第一延伸段421、第二延伸段422和第三延伸段的径向外表面在远离主体部41的方向均向靠近保持架4的中心的方向收缩，使得延伸部42径向外表面在轴向上有直径减小的趋势。
采用本申请实施例的轴承，保持架4的延伸部42包括第一延伸段421、第二延伸段422和第三延伸段，第一延伸段421、第二延伸段422和第三延伸段的径向外表面在远离主体部41的方向均向靠近保持架4的中心的方向收缩，进一步地有效减少了保持架4的径向外表面靠近延伸部42的端面处的材料，在轴承装配过程中，能使滚动体2更容易装入到保持架4兜孔内，并有效降低滚动体2装配过程中造成的损伤风险，同时，还尽可能多的保留保持架4其他位置的材料，避免影响保持架4的强度。并且采用本申请实施例的轴承，可以在避免滚动体2装入保持架4过程中损伤的同时，减小滚动体2从保持架4兜孔中掉出的风险。而且，不用铣削额外的安装槽，装配便捷，提高装配效率。
在同一径向截面上，第一延伸段421的径向外表面的轮廓线为曲线或直线，第二延伸段422的径向外表面的轮廓线为曲线或直线，第三延伸段的径向外表面的轮廓线为曲线或直线。
第一延伸段421的径向外表面的轮廓线、第二延伸段422的径向外表面的轮廓线与第三延伸段的径向外表面的轮廓线为一段完整的曲线。这样，第一延伸段421的径向外表面、第二延伸段422的径向外表面和第三延伸段的径向外表面可以更平滑地过渡。
并且，第一延伸段421的径向外表面、第二延伸段422的径向外表面和第三延伸段的径向外表面向靠近保持架4的中心的方向收缩的趋势顺次增大。进一步地有效减少了保持架4的径向外表面靠近延伸部42的端面处的材料，能使滚动体2更容易装入到保持架4兜孔内，并有效降低滚动体2装配过程中造成的损伤风险，同时，还尽可能多的保留保持架4其他位置的材料，避免影响保持架4的强度。
本申请实施例中，还可以在主体部41的两个侧面均设有延伸部42，此时的保持架4为双列保持架，参考图4。在主体部41的一个侧面设置多个延伸部42，同时在主体部41的另一个相反的侧面设置多个延伸部42，两组延伸部42共用主体部41。
在主体部41的两个侧面均设有延伸部42的情况下，主体部41的径向外表面的轮廓线的中点为P1，在任一侧面，主体部41的径向外表面的轮廓线与第一延伸段421的径向外表面的轮廓线的交点为P2，第一延伸段421的径向外表面的轮廓线与第二延伸段422的径向外表面的轮廓线的交点为P3，第二延伸段422的径向外表面的轮廓线远离主体部41的端点为P4。
其中，P2和P3的连线与主体部41的径向外表面的轮廓线形成的夹角小于P3和P4的连线与主体部41的径向外表面的轮廓线形成的夹角。如图4所示，P2和P3的连线与主体部41的径向外表面的轮廓线形成的夹角为α，P3和P4的连线与主体部41的径向外表面的轮廓线形成的夹角为β，α<β，也就是第二延伸段422向靠近保持架4的中心的方向收缩的趋势更大。
在由保持架4的中心和P2形成包络圆的情况下，P1、P3和P4都位于包络圆之内。如图4所示，由保持架4的中心和P2形成半径为R的包络圆，P1、P3和P4都位于该半径为R的包络圆之内，便于保持架4在外圈1内的装配。
本申请实施例中的轴承可以为调心滚子轴承，也可以为需要保持架4安装滚动体2的其他类型的轴承。
如前所述，尽管说明中已经参考附图对本申请的示例性实施例进行了 说明，但是本申请不限于上述具体实施方式，本申请的保护范围应当由权利要求书及其等同含义来限定。
附图标记列表
外圈       1、1'
滚动体     2、2'
内圈       3、3'
保持架     4、4'
主体部     41
延伸部     42
第一延伸段 421
第二延伸段 422

Claims (10)

  1. (直接将主题修改为轴承)一种轴承，其特征在于，所述轴承包括外圈(1)、内圈(3)、滚动体(2)以及保持架(4)，其中，所述保持架(4)包括：
    主体部(41)，其为环状；以及
    多个延伸部(42)，其设于所述主体部(41)的侧面，并且相邻所述延伸部(42)与其之间的部分所述主体部(41)形成用于容置滚动体(2)的兜孔；
    其中，(只能是圆柱面？有没有可能是圆锥面或者其他？)所述延伸部(42)包括第一延伸段(421)和第二延伸段(422)，所述第一延伸段(421)与所述主体部(41)相接，所述第二延伸段(422)与所述第一延伸段(421)相接，所述第一延伸段(421)和所述第二延伸段(422)的径向外表面在远离所述主体部(41)的方向均向靠近所述保持架(4)的中心的方向收缩。
  2. 根据权利要求1所述的轴承，其特征在于，在同一径向截面上，所述第一延伸段(421)的径向外表面的轮廓线为曲线或直线，所述第二延伸段(422)的径向外表面的轮廓线为曲线或直线。
  3. 根据权利要求2所述的轴承，其特征在于，所述第一延伸段(421)的径向外表面的轮廓线与所述第二延伸段(422)的径向外表面的轮廓线为一段完整的曲线。
  4. 根据权利要求1所述的轴承，其特征在于，所述主体部(41)的径向外表面的轮廓线远离所述延伸部(42)的端点为P1'，所述主体部(41)的径向外表面的轮廓线与所述第一延伸段(421)的径向外表面的轮廓线的交点为P2'，所述第一延伸段(421)的径向外表面的轮廓线与所述第二延伸段(422)的径向外表面的轮廓线的交点为P3'，所述第二延伸段(422)的径向外表面的轮廓线远离所述主体部(41)的端点为P4'，
    其中，P2'和P3'的连线与所述主体部(41)的径向外表面的轮廓线形成的夹角小于P3'和P4'的连线与所述主体部(41)的径向外表面的轮廓线 形成的夹角。
  5. 根据权利要求4所述的轴承，其特征在于，在由所述保持架(4)的中心和P2'形成包络圆的情况下，P1'、P3'和P4'都位于所述包络圆之内。
  6. 根据权利要求1所述的轴承，其特征在于，所述延伸部(42)还包括第三延伸段，所述第三延伸段与所述第二延伸段(422)相接，所述第三延伸段的径向外表面由第二延伸段(422)的末端在远离所述主体部(41)的方向向靠近所述保持架(4)的中心的方向收缩。
  7. 根据权利要求6所述的轴承，其特征在于，在同一径向截面上，所述第一延伸段(421)的径向外表面的轮廓线为曲线或直线，所述第二延伸段(422)的径向外表面的轮廓线为曲线或直线，所述第三延伸段的径向外表面的轮廓线为曲线或直线。
  8. 根据权利要求7所述的轴承，其特征在于，所述第一延伸段(421)的径向外表面的轮廓线、所述第二延伸段(422)的径向外表面的轮廓线与所述第三延伸段的径向外表面的轮廓线为一段完整的曲线。
  9. 根据权利要求1所述的轴承，其特征在于，所述主体部(41)的两个侧面均设有所述延伸部(42)。
  10. 根据权利要求9所述的轴承，其特征在于，所述主体部(41)的径向外表面的轮廓线的中点为P1，在任一侧面，所述主体部(41)的径向外表面的轮廓线与所述第一延伸段(421)的径向外表面的轮廓线的交点为P2，所述第一延伸段(421)的径向外表面的轮廓线与所述第二延伸段(422)的径向外表面的轮廓线的交点为P3，所述第二延伸段(422)的径向外表面的轮廓线远离所述主体部(41)的端点为P4，
    其中，P2和P3的连线与所述主体部(41)的径向外表面的轮廓线形成的夹角小于P3和P4的连线与所述主体部(41)的径向外表面的轮廓线形成的夹角。
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CN102506075A (zh) * 2011-11-08 2012-06-20 洛阳瑞成轴承有限责任公司 一种调心滚子轴承剖分式保持架及其设计方法
CN104100641A (zh) * 2013-04-03 2014-10-15 株式会社捷太格特 双列滚子轴承用的梳形保持架以及双列滚子轴承
JP2014202247A (ja) * 2013-04-03 2014-10-27 株式会社ジェイテクト 複列ころ軸受用の樹脂製櫛型保持器及び複列ころ軸受
CN105508417A (zh) * 2015-12-29 2016-04-20 瓦房店轴承集团有限责任公司 保持架复合引导大型水泥辊压机用调心滚子轴承
CN206754152U (zh) * 2017-05-22 2017-12-15 人本集团有限公司 双列调心滚子轴承及其保持架

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102506075A (zh) * 2011-11-08 2012-06-20 洛阳瑞成轴承有限责任公司 一种调心滚子轴承剖分式保持架及其设计方法
CN104100641A (zh) * 2013-04-03 2014-10-15 株式会社捷太格特 双列滚子轴承用的梳形保持架以及双列滚子轴承
JP2014202247A (ja) * 2013-04-03 2014-10-27 株式会社ジェイテクト 複列ころ軸受用の樹脂製櫛型保持器及び複列ころ軸受
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CN206754152U (zh) * 2017-05-22 2017-12-15 人本集团有限公司 双列调心滚子轴承及其保持架

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