CN108350942B - 球轴承保持架 - Google Patents
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- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
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- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
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- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
- F16C33/3843—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
- F16C33/3843—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
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- F16C2322/00—Apparatus used in shaping articles
- F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本发明涉及一种球轴承保持架(2),所述球轴承保持架具有两个通过接片(5)彼此连接的侧环(3,4),其中在环周方向上,在接片(5)之间形成滚动体兜孔(6),所述滚动体兜孔分别形成具有倒圆的角的正方形的基本形状。侧环(3,4)与接片(5)一起形成每个滚动体兜孔(6)的引导轮廓(10),所述引导轮廓在其角之间具有四个凸形的、相反于角的倒圆部定向的侧轮廓(8,9)。通过每个滚动体兜孔(6)的多重凹形‑凸形的引导轮廓(10),滚动体(7),即滚珠,低摩擦地在球轴承保持架(2)中被引导,其中同时提供良好的润滑条件。
Description
技术领域
本发明涉及一种适合于使用在球轴承中的、尤其主轴轴承中的球轴承保持架,所述保持架具有两个侧环、连接侧环的接片以及在接片和侧环之间形成的滚动体兜孔,所述滚动体兜孔分别具有正方形的基本形状,所述正方形的基本形状具有倒圆的角。
背景技术
从JP 2008 133 894 A中已知的柱形的球轴承保持架具有滚动体兜孔,所述滚动体兜孔具有矩形的基本形状,所述矩形的角通过倒圆的区域被扩宽。角的倒圆部将降低机械应力。
从DE 10 2004 018 868 A1中已知的球轴承保持架具有基本上柱形的滚动体兜孔,所述滚动体兜孔通过四个沿球轴承保持架的径向方向伸展的沟槽被扩宽,所述沟槽将每个滚动体兜孔的柱形的基本形状改为正方形的图案。
具有滚动体兜孔的另一球轴承保持架例如从JP 2007 170 470 A中已知,所述滚动体兜孔将柱形开口的几何特征与矩形的基本形状组合。
发明内容
本发明所基于的目的是:提出一种相对于所提出的现有技术进一步改进的球轴承保持架,所述球轴承保持架的特征在于尤其低的摩擦功率进而尤其适合于具有高的转速特征值的应用,尤其在主轴轴承中的应用。
根据本发明,球轴承保持架构成为具有两个侧环的窗孔保持架,其中通过接片形成用于引导各一个滚珠的滚动体兜孔,所述接片将侧环优选一件式地彼此连接。每个滚动体兜孔的基本形状——径向从外朝向球轴承保持架的中轴线观察——是正方形的。侧环的两个相对置的部段以及两个在环周方向上相邻的接片在此形成近似正方形的滚动体兜孔的侧部。对于在球轴承保持架中被引导的滚动体,即滚珠,侧环连同接片一起在此形成滚动体兜孔的引导轮廓。具有正方形基本形状的引导轮廓在其四个角之间分别形成凸形的、相反于角的倒圆部定向的侧轮廓。将侧轮廓表征为凸形在此涉及基本上长形的接片或侧环的部段,所述部段对滚动体兜孔限界。接片或侧环的部段,径向从外部在球轴承保持架上观察,在滚动体兜孔的角倒圆部之间向外、即凸形地拱起,使得滚动体兜孔在相关的部位处具有向内的拱起部。相反于此,角倒圆部为滚动体兜孔的向外的拱起部。因此,滚动体兜孔的环绕的边缘轮廓分别具有四个凹形的和四个凸形的部段。
导入滚动体兜孔中的滚动体通过滚动体兜孔的引导轮廓支撑在四个部位处,即在两个环周方向上以及在滚动体的两个轴向方向上。在此,每个支撑部仅点状或最多线性地构成,其中相关的线基本上沿球轴承保持架的径向方向延伸。由此得到滚动体的尤其低摩擦的引导。同时,通过滚动体兜孔的倒圆的角形成重要的润滑剂储备部、例如用于润滑脂的润滑剂储备部,其中滚动体兜孔的角倒圆部的半径大大小于滚动体半径。相反,滚动体兜孔的凸形的侧轮廓的曲率半径与滚动体半径一样大或甚至更大。在凸形的侧轮廓和滚动体兜孔的角倒圆部之间优选存在无棱边的过渡。
在优选的设计方案中,与两个侧环相比,分别形成两个凸形的侧轮廓的接片沿径向方向,即朝向球轴承保持架的旋转轴线,更向内延伸,所述凸形的侧轮廓在环周方向上对相邻的滚动体兜孔限界。整体上,尤其通过从侧环向内拉伸的接片,每个滚动体兜孔优选径向从外向内渐缩。与之相应地,与作为在球轴承的轴向方向上的支撑部的那些引导轮廓相比,沿球轴承的环周方向支撑滚动体的引导轮廓能够在球轴承的径向方向上在更宽的区域上延伸。通过滚动体支撑球轴承保持架优选大部分或仅通过接片进行,这涉及径向方向。在此,通过两个在环周方向上相邻的接片形成滚动体兜孔的保持凸起,所述保持凸起与引导轮廓相比更接近滚动轴承保持架的旋转轴线设置,所述引导轮廓在滚动体和球轴承保持架之间传递轴向力,并且可算作滚动体兜孔的正方形的基本形状。
接片的沿球轴承保持架的径向方向测量的高度优选为侧环的沿相同方向测量的高度的至少1.5倍和最高2.5倍,尤其至少两倍。相反,接片的沿球轴承保持架的轴向方向测量的宽度优选径向从外向内减少。在此,接片在其内边缘处的宽度优选最大为整个保持架宽度的四分之一,即球轴承保持架的沿轴向方向测量的总宽度的四分之一。在保持架的径向内边缘——更确切地说,保持架的接片——形成倒圆的轮廓的情况下,接片在其内边缘处的沿轴向方向测量的宽度几乎为零。
在有利的设计方案中,两个接片的朝向滚动体兜孔的表面分别形成鞍形面。鞍形面理解为在两个主方向上彼此相反地,即互反地弯曲的面。鞍形面的高斯曲率数值是负的。成形为鞍形面的接片面的特别的优点是如下事实:所述鞍形面沿着扩展的线引导滚动体,所述线沿滚动体的环周方向延伸并且形成圆的弧线,所述圆的旋转轴线与滚珠的旋转轴线相同。同时,除了位于球轴承保持架的中心平面中的所述引导线之外,朝向球轴承保持架的两个端侧保留足够的空间以容纳润滑剂,所述润滑剂以短的路径到达在滚动体和球轴承保持架之间的接触区域。
整体上,滚动体兜孔的连续截成弧形的、具有协调的过渡部的形状提供在滚动体和轴承保持架之间的有利的止推面,其中同时直接围绕滚动体形成大的油脂空间体积。
球轴承保持架能够经济地由塑料,尤其纤维增强塑料制造,并且例如适合于使用在机床中的主轴轴承中。使用球轴承保持架的滚动轴承例如能够为深沟球轴承、四点轴承或角接触球轴承。在任何情况下,滚动体,即滚珠,低摩擦地在球轴承保持架中通过每个滚动体兜孔的多重凸形-凹形的引导轮廓被引导,其中同时也在油脂润滑的情况下提供良好的润滑条件。
附图说明
在下文中参考所附的附图详细阐述根据本发明构成的球轴承保持架的优选的实施方式。在此示出:
图1部分地示出具有球轴承保持架的球轴承的俯视图,
图2示出根据图1的装置的球轴承保持架的剖面图,
图3示出根据图2的球轴承保持架的立体剖面图。
具体实施方式
图1沿径向方向示出整体用附图标记1表示的滚动轴承,即球轴承的俯视图,其具有球轴承保持架2,所述球轴承保持架构成为由塑料制成的窗孔保持架。球轴承保持架2的两个侧环3、4一件式地通过接片5彼此连接,所述接片沿滚动轴承1的轴向方向伸展。分别在两个沿环周方向相邻的接片5之间形成用于容纳滚动体7,即滚珠的滚动体兜孔6。在根据图1的视图中,每个滚动体兜孔6具有正方形的基本形状,所述正方形的基本形状具有倒圆的角,其中角半径用r表示。滚动体兜孔6的四个角通过侧轮廓8、9彼此连接。在此,两个基本上彼此平行的侧轮廓8通过两个接片5形成,而滚动体兜孔6的两个另外的、同样彼此基本上平行的侧轮廓9通过侧环3、4形成。每个侧轮廓8、9具有关于接片5或关于侧环3、4倒圆的、向外拱起的形状,即凸形的形状。这表示:每个接片5,从其到侧环3、4的过渡区域,朝向接片5的中部,即朝向球轴承保持架2的中心平面,扩宽。类似地,侧环3、4在环周方向上居中地在两个相邻的接片5之间,即在滚动体兜孔6的中部,扩宽。滚动体兜孔6的四个侧轮廓8、9与滚动体兜孔6的倒圆的角一起形成闭合的轮廓,所述轮廓起引导轮廓10的作用并且在根据图1的径向俯视图中分别具有四个凸形的和凹形的区域。凸形的区域,即侧轮廓8、9的曲率半径用r8或r9表示。在该实施例中,曲率半径r8、r9在接片5处或在侧环3、4处是相同的,并且至少是滚动体兜孔6的每个角处的角半径r的两倍大。
接片5如尤其从图2和3中得出从侧环3、4起沿球轴承保持架2的径向方向向内延伸。每个接片5的在侧环3、4进而整个球轴承保持架2的径向方向测量的高度用HST表示,并且大致为侧环3、4的沿相同方向测量的、用HSR表示的侧环高度HSR的两倍。
接片5在其向内超出侧环3、4的区域中在球轴承保持架2的环周方向上变厚,由此其匹配于球7的形状,而接片5的在滚动轴承1的轴向方向测量的宽度从外向内减少。球轴承保持架2的最内的点通过接片5处的倒圆部11形成,所述倒圆部最佳地在接片5的切向俯视图中可见。近似地,每个接片5的朝向内的,即朝向球轴承轴线的轮廓,在接片5的切向俯视图中形成U形的或在其尖部稍微倒圆的V形的形状。通过该U形的或V形的轮廓和填充所述轮廓的表面,与在球轴承保持架2的外环周上的轮廓一起,在每个接片5的两个环周侧上分别形成鞍形面12。在此,鞍形面12的沿径向方向最内的点为接片5的保持凸起13。在每个鞍形面12处,引导线14从保持凸起13延伸直至球轴承保持架2的外环周,滚动体7能够在所述引导线上运动。全部引导线14位于如下平面中,所述平面与球轴承保持架2的中心平面相同,即居中地设置在球轴承保持架2的两个端侧之间。引导线14因此位于滚动轴承1的区域中,在所述区域中,在滚动体7和球轴承保持架2之间的相对速度最大,这有助于球轴承1中的润滑剂的快速的、均匀的分布。在此,润滑剂,尤其油脂,特别是出自润滑剂储备部的润滑剂,被运送到滚动体7和球轴承保持架2之间的接触区域中,所述润滑剂储备部位于滚动体兜孔6的角内。
附图标记列表
1 滚动轴承
2 球轴承保持架
3 侧环
4 侧环
5 接片
6 滚动体兜孔
7 滚动体,滚珠
8 侧轮廓
9 侧轮廓
10 引导轮廓
11 倒圆部
12 鞍形面
13 保持凸起
14 引导线
HSR 侧环高度
HST 接片高度
r 角半径
r8 曲率半径
r9 曲率半径
Claims (10)
1.一种球轴承保持架(2),所述球轴承保持架具有两个通过接片(5)彼此连接的侧环(3,4),其中在环周方向上在所述接片(5)之间形成滚动体兜孔(6),所述滚动体兜孔分别具有正方形的基本形状,所述正方形的基本形状具有四个倒圆的角,其特征在于,所述侧环(3,4)与所述接片(5)一起形成每个滚动体兜孔(6)的引导轮廓(10),所述引导轮廓在其角之间具有四个凸形的、相反于所述角中的倒圆定向的侧轮廓(8,9),从而导致每个接片(5),从其到侧环(3,4)的过渡区域,朝向接片(5)的中部扩宽,同时侧环(3,4)在环周方向在滚动体兜孔(6)的中部扩宽。
2.根据权利要求1所述的球轴承保持架(2),其特征在于,与所述侧环(3,4)相比,所述接片(5)径向更向内延伸。
3.根据权利要求1所述的球轴承保持架(2),其特征在于,每个滚动体兜孔(6)径向向内渐缩。
4.根据权利要求3所述的球轴承保持架(2),其特征在于,所述接片(5)的沿所述侧环(3,4)的径向方向测量的高度(HST)为沿相同方向测量的侧环高度(HSR)的至少1.5倍和最高2.5倍。
5.根据权利要求3或4所述的球轴承保持架(2),其特征在于,所述接片(5)的沿所述侧环的轴向方向测量的宽度沿径向从外向内减少。
6.根据权利要求5所述的球轴承保持架(2),其特征在于,所述接片(5)在其径向内边缘处的宽度最大为保持架总宽度的四分之一。
7.根据权利要求6所述的球轴承保持架(2),其特征在于,所述保持架的径向内边缘形成倒圆部(11)。
8.根据权利要求1所述的球轴承保持架(2),其特征在于,所述接片(5)的朝向所述滚动体兜孔(6)的表面分别形成鞍形面(12)。
9.根据权利要求1所述的球轴承保持架(2),其特征在于,通过两个在环周方向上相邻的接片(5)形成滚动体兜孔(6)的保持凸起(13),与所述滚动体兜孔(6)的所述引导轮廓(10)相比,所述保持凸起在所述侧环(3,4)的径向方向上更内部地设置。
10.一种根据权利要求1所述的球轴承保持架(2)在主轴轴承中的应用。
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DE102015223255.7 | 2015-11-25 | ||
DE102015223255.7A DE102015223255A1 (de) | 2015-11-25 | 2015-11-25 | Kugellagerkäfig |
PCT/DE2016/200478 WO2017088862A2 (de) | 2015-11-25 | 2016-10-19 | Kugellagerkäfig |
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CN108350942A CN108350942A (zh) | 2018-07-31 |
CN108350942B true CN108350942B (zh) | 2021-07-27 |
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US (1) | US10451112B2 (zh) |
EP (1) | EP3380738B1 (zh) |
JP (1) | JP7060505B2 (zh) |
CN (1) | CN108350942B (zh) |
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CN109372893A (zh) * | 2018-12-17 | 2019-02-22 | 上海航天控制技术研究所 | 一种低速快机动轴系装置 |
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- 2016-10-19 JP JP2018526934A patent/JP7060505B2/ja active Active
- 2016-10-19 US US15/773,435 patent/US10451112B2/en not_active Expired - Fee Related
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JP7060505B2 (ja) | 2022-04-26 |
WO2017088862A3 (de) | 2017-08-10 |
US10451112B2 (en) | 2019-10-22 |
CN108350942A (zh) | 2018-07-31 |
WO2017088862A2 (de) | 2017-06-01 |
EP3380738A2 (de) | 2018-10-03 |
DE102015223255A1 (de) | 2017-06-01 |
EP3380738B1 (de) | 2019-12-18 |
US20180335085A1 (en) | 2018-11-22 |
JP2019500552A (ja) | 2019-01-10 |
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