CN106122284B - 包括密封凸缘的轴承 - Google Patents
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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
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- 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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Abstract
轴承包括外环(14),内环(16),固定到一个环(14)上并与另一个环(16)配合的至少一个密封件(22)、以及至少一个密封凸缘(26)。密封凸缘(26)包括将所述凸缘(26)固定到所述另一个环(16)上的固定部(26a)、端部(26b)和连接所述固定部(26a)和端部(26b)的连接部(26c)。所述密封凸缘(26)的端部(26b)是弯曲的,并轴向面对连接部(26c)布置。弯曲的端部(26b)和连接部(26c)限定了环形空间(44),其朝所述另一个环(16)径向开放。所述弯曲的端部(26b)与所述密封件(22)的外侧面(36)接触而轴向安装。
Description
技术领域
本发明涉及轴承领域,特别是那些用于汽车或工业应用中的轴承。
背景技术
在轴承中,一个或多个密封件通常用于在轴承内部,保持润滑剂,如润滑脂,并防止污染颗粒进入。通常,这种密封件固定在一个轴承环上,并与另一个环配合,以便构成动态密封。
专利申请WO-A1-2010/133240(SKF)公开了一种滚动轴承,包括固定到外环的两个密封件,分别包括与内环摩擦接触的内唇。轴承还包括两个密封凸缘,固定到内环上,并且相关联的密封件的外唇倚靠其滑动。
使用这种轴向在轴承每一侧上,并与相关联的密封件的外唇配合的凸缘,允许限制污染颗粒通到与内环摩擦接触的所述密封件的内唇。然而,由凸缘上的弹性外唇施加的接触压力趋向于随时间降低,并且在轴承环的相对角度倾斜的情况下。这可能会影响运行过程中轴承的密封性能。此外,该解决方案需要使用特定的密封件,分别包括外唇。
发明内容
本发明的目的是克服该缺点。
更具体地说,本发明的目的在于提供一种具有改进密封的轴承。
本发明进一步的目的是提供一种易于制造和组装的轴承。
在一个实施例中,轴承包括外环、内环、至少一个密封件,该至少一个密封件固定到一个环上,并与另一个环配合。轴承还包括至少一个密封凸缘、端部和连接所述固定部和端部的连接部,该至少一个密封凸缘包括固定部,用于将所述凸缘固定到所述另一个环上。
所述凸缘的端部是弯曲的,并与连接部相对轴向设置。所述弯曲的端部和连接部限定了环形空间,其朝另一个环径向开放。所述弯曲的端部与所述密封件的外侧面接触而轴向安装。
密封凸缘可以以低成本制造。凸缘弯曲的端部通过与相关联的密封件的轴向接触确保了密封。密封件也可以是常规的设计,即没有任何外密封唇要与凸缘配合。此外,在弯曲的端部的径向方向上的长度可根据将要施加到密封件上的轴向负载水平轻易地调节。此外,在弯曲的端部和连接部之间限定的环形空间可用于润滑剂贮存槽,以润滑密封件和凸缘之间的一个或多个接触区域。润滑剂可在轴承组装过程中设置在所述空间内,或者所述空间可通过从腔室离心分离到达在密封件和凸缘之间连通,其中在组装过程中布置润滑剂。
此外,防止密封件与密封凸缘的弯曲的端部的尖锐边缘的任何接触,以避免所述密封件的任何劣化。
在一个实施例中。所述密封凸缘在轴向方向上至少部分可弹性变形,至少连接部通过弯曲的端部和所述密封件之间的轴向接触朝轴承的外部轴向变形。
至少连接部的轴向变形与凸缘的弹性特征结合,允许随着时间保持所述凸缘和密封件之间的密封。响应于至少连接部抵抗其自身的弹性变形,所述凸缘的弯曲的端部在密封件上施加不变的轴向负载。
凸缘的固定部可与所述另一个环的前表面接触而轴向安装。
在一个实施例中,所述凸缘的弯曲的端部包括至少一个通孔,在其厚度中构成,以允许包含在环形空间中的润滑剂朝与密封件的轴向接触扩散。
所述凸缘的每个端弯曲部可具有波纹形状。
在一个实施例中,密封件包括密封垫圈,由柔性材料制成,并限定了外侧面,密封凸缘的至少端弯曲部由刚性材料制成。
优选地,所述密封凸缘一体制成和/或包括恒定的厚度。
在一个实施例中,所述密封凸缘由金属制成。可替代地,所述凸缘的连接部可由柔性材料制成,特别是合成或聚合物材料。端弯曲部、固定部、连接部可由相同的材料或不同的材料制成。
附图说明
本发明将通过实施例的详细描述更好地理解,实施例作为本发明的非限制实例并由所附附图示出,其中:
-图1是根据本发明的第一实施例的轴承的轴向半剖视图;
-图2是根据本发明的第二实施例的轴承的轴向半剖视图;
-图3是图2的轴承的密封凸缘的详细视图;以及
-图4是根据本发明的第三实施例的轴承的轴向半剖视图。
具体实施方式
在图1中,滚动轴承10,具有轴线12,包括外环14、内环16、多个滚动元件18和保持架20,多个滚动元件18在这里是滚珠,径向设置在环之间,保持架20保持滚动元件有规律地周向间隔开。
轴承10轴向地在每一侧上包括环形密封件22,24,以封闭内环16和外环14之间限定的径向空间。轴承10还轴向地在每一侧上包括环形密封凸缘26,28,其轴向地接触所述轴承10的外侧上的所述密封件22,24。在示出的实施例中,密封件22,24固定到外环14上,而密封凸缘固定到内环16上。
外环14包括外轴向圆柱形表面,圆柱形孔,两个相对的前表面,轴向地划定所述孔和外表面,以及设置在孔上的滚道,并具有适于滚动元件18的内凹形轮廓,所述滚道径向向内指向。外环14还包括设置在孔上的两个环形凹槽,所述凹槽径向向外延伸,并轴向布置在滚动元件18的任一侧上。在图1中,外环14的所述不同部分没有标记。
内环包括圆柱形孔16a,外轴向圆柱形表面16b,两个径向相对的前表面16c,16d,轴向划定所述孔和外表面,以及设置在外表面16b上的滚道,并具有适于滚动元件18的内凹形轮廓,所述滚道径向向外指向。保持架20径向布置在内环16的外表面16b和外环14的孔之间所限定的径向空间内。
内环16还包括两个环形凹槽,未标记,设置在外表面16b上,径向向内延伸,并轴向布置在滚动元件18的任一侧上。内环的每个凹槽与外环的相应的凹槽径向相对。
每个密封件22,24径向布置在外环14和内环16之间,并且固定至所述外环14上,以便相对于滚动元件18横向布置。每个密封件22,24固定在外环14的一个凹槽中。每个密封件22,24完全装配在外环14和内环16之间限定的径向空间内。每个密封件22,24相对于外环的相关前表面,轴向偏移到轴承的内侧。
在本实施例中,密封件22,24是相同的,并且相对于轴承10的径向中央平面对称。两个密封件22,24是相同的,我们现在将仅描述这两个中的一个。
密封件22包括环形刚性插入件30和固定到所述插入件30的环形柔性密封垫圈32。插入件30由刚性材料制成,例如,金属或热塑性材料,特别是聚酰胺。插入件30构成用于密封垫圈32的加强插入件。密封垫圈32包覆模制或硫化到所述插入件30上。密封垫圈32由柔性材料制成,例如弹性体如丁腈橡胶或热塑性弹性体。
密封垫圈32覆盖插入件30的外表面。密封垫圈32覆盖插入件30的外侧面。密封垫圈32包括环形外侧面36,从轴承10的外侧轴向地指向相关联的密封凸缘26。外侧面36相对于内环16和外环14的前表面,向轴承10的内侧轴向偏移。密封垫圈32的外侧面36构成密封件22的外侧面。外侧面36是平坦的。外侧面36径向延伸。内侧面38与所述外侧面36轴向相对,并轴向指向轴承10的内部。这里,内侧面38由插入件30限定。
密封垫圈32构成两个密封部,两个密封部径向相对,并与内环14形成静态密封,与外环16形成动态密封。更精确地说,“静态密封”是在没有相对运动的两部分之间构成的密封,而“动态密封”是在相对运动的两部分之间的密封。
垫圈32的外密封部压配在外环14的相关联的凹槽中,以便将密封件22固定在所述环14中。只有垫圈32与外环14接触。利用压配和摩擦安装使密封件22能够良好的保持就位。在示出的实施例中,垫圈32的内密封部包括第一唇32a和第二唇32b。唇32a,32b是环形的并且是同心的,朝轴承10的内部轴向延伸。唇32b接触内环16的凹槽的径向壁。内唇32a的直径大于唇32b,并且径向围绕内环16的外表面16b,以与所述外表面构成迷宫式窄通道。
每个密封凸缘26,28相对于相关密封件22,24轴向偏移到轴承10的外侧。每个密封凸缘26,28轴向靠在内环16的前表面16c,16d的一个上,并支撑相关密封件22,24的密封垫圈32。密封凸缘26,28相对于通过轴承10中心的横向径向平面彼此对称。两个密封凸缘26,28是相同的,我们现在将仅描述这两个中的一个。
密封凸缘26固定到内环16,并朝外环14轴向延伸。密封凸缘26由任何适当的方法,例如胶合或焊接固定到内环16上。密封凸缘26与内环16的前表面16c接触而轴向安装。密封凸缘26固定在所述前表面16c上。在示出的实施例中,密封凸缘26直接接触所述内环16安装。可替代地,中间元件可以轴向插入内环16和凸缘26之间。
密封凸缘26与密封件22的外侧表面36轴向接触。凸缘26包括内侧面40,其轴向朝密封件22定向,并接触所述密封件22,以及外侧面42,其轴向朝轴承10的外部定向,除了在端部上,如将在下文进一步解释的那样。内侧面40和外侧面42轴向限定凸缘26的厚度。在示出的实施例中,凸缘26与密封件22直接接触而轴向安装。
凸缘26包括环形固定部26a,与内环16的前表面16c接触而轴向安装,以及环形弯曲的端部26b,与密封件22接触而轴向安装。凸缘26还包括环形径向连接部26c,其在固定部26a和弯曲的端部26b之间延伸以连接它们。连接部26c径向延伸固定部26a,并由支撑部26b径向延伸。在示出的实施例中,凸缘26的弯曲的端部26a具有纯径向形状。固定部26a构成所述凸缘26的内部部分。弯曲的端部26b构成所述凸缘26的外部或端部部分。
端部26b从连接部26c延伸。端部26b向密封件22弯曲。弯曲的端部26b轴向倚靠密封件22的密封垫圈32安装。只有凸缘26的弯曲的端部26b与密封件22接触安装。凸缘26的弯曲的端部26b和密封件22之间的接触为环形的。在示出的实施例中,在凸缘26的弯曲的端部26b和密封件22之间具有单个环形接触区域。
凸缘26的端部26b朝内环16弯曲。弯曲的端部26b在凸缘26的内表面40的一侧上折叠。端部26b轴向设置在凸缘26的弯曲的端部26b和密封件22之间。由于端部26b是弯曲的,外侧面42在那里朝密封件22轴向定向,而内侧面40在那里朝所述密封件的相对方向轴向定向。在端部26b的区域中,外侧面42与密封件22轴向接触。在示出的实施例中,弯曲的端部在外侧上轴向凹入,而在内侧上突起。然后,降低了凸缘26和密封件22之间的摩擦。端部26b具有C形轮廓,朝凸缘26的连接部26c定向。
凸缘26的弯曲的端部26b轴向布置为面对连接部26c。弯曲的端部26b轴向布置为面对连接部26c具有更大直径的区域。在轴向方向上,在端部26b和连接部26c之间没有接触。环形空间或腔室44由弯曲的端部26b和连接部26c限定。空间44向内环的一侧径向开放。
在示出的实施例中,凸缘26一体制成。凸缘26由刚性材料制成,例如金属,有利地由金属板切割冲压侧面制成。在这种情况下,弯曲的端部有利地在冲压过程中由凸缘的自由端的变形构成。可替代地,凸缘26可以由另一种刚性材料制成,例如模制的合成材料如聚酰胺。在这种情况下,弯曲的端部26b可在模制操作过程中制成。
凸缘26通过弯曲的端部26b和密封件22之间的轴向接触朝轴承10的外部轴向变形。凸缘26的连接部26c通过所述轴向接触朝外部轴向变形。连接部26c抵抗其自身的弹性变形。凸缘26通过与密封件22的接触轴向地预载。在预载状态下,内侧面40一侧上固定部26a和弯曲的端部26b之间的轴向距离小于凸缘的自由状态下或未经请求的所述部分之间的轴向距离。
凸缘26的连接部26c倾向于通过弹性,返回到其未加载或轴向未经请求的位置。凸缘26的支撑部26b在密封件22上施加不变的轴向负载。良好的密封性能保持一段时间,由于保持凸缘26的支撑部26b和密封件22之间的轴向滑动接触。事实上,污染颗粒的到达在支撑部26b和密封件22之间受到限制。所述污染颗粒的到达受到限制,直到密封件22的动态密封部与内环16配合。
在轴承10的组装过程中,润滑剂(未示出),例如润滑脂,设置在由各密封件22,24和相关联的密封凸缘26,28之间限定的密封腔室内。每个腔室由相关联的凸缘的内侧面40的密封件的外侧面36限定。空间44,由弯曲的端部26b和连接部26c轴向面对所述弯曲的端部26b的部分轴向限定,与相关联的腔室连通。在内环16的旋转过程中,离心力倾向于将润滑剂向空间44喷射,以构成润滑剂贮存槽,其可用于润滑密封件22和凸缘26的弯曲的端部之间的接触。
图2所示的实施例,其中相同的元件具有相同的附图标记,不同于之前的实施例,凸缘26的弯曲的端部26b具有波纹形状。在该实施例中,在弯曲的端部26b和密封件22之间具有两个环形和同轴接触区域。在组装过程中,润滑剂也可以设置在这两个接触区域之间限定的环形空间内。可替代地,可以设置多个接触区域。
可替代地,如图3所示,其中相同的元件具有相同的附图标记,凸缘26的弯曲的端部26b在所述部分26b的厚度上包括多个通孔50,以促进储存在空间44中的润滑剂向与密封件22接触的区域扩散。优选地,孔50在弯曲的端部26b的整个圆周上分布。孔50在端部26b上分布,以防止润滑剂扩散出轴承10。孔50相对于端部26b和密封件22之间较大直径的接触区域向内环16径向偏移。
在示出的实施例中,每个密封凸缘在轴向方向上可弹性变形,并在其组装过程中通过弯曲的端部与密封件的接触而变形。密封件和相关联的密封凸缘之间良好的密封特性随着时间保持。可替代地,每个密封凸缘可不弹性变形,并在组装过程中通过弯曲的端部与密封件的接触可不弹性变形。
在示出的实施例中,每个密封凸缘固定到内环的前表面中的一个。可替代地,每个凸缘可以固定在设置在内环的孔中的环形凹槽中,例如通过卷边。在这种情况下,凸缘的固定部可以具有L形状。
在示出的实施例中,每个密封件包括两个部分,即加强插入件和固定到所述插入件的密封垫圈,密封垫圈设置有至少一个滑动唇,与内环配合。可替代地,密封垫圈可以只包括一个或多个迷宫式唇,与内环配合。可替代地,密封件可以只包括一个部分,即插入件或密封垫圈。
在示出的实施例中,密封凸缘固定到内环而密封件固定到外环。可替代地,该设置可以反过来,所述密封件固定到内环而所述密封凸缘固定到外环。
本发明示出滚动轴承,包括设置在轴承环之间的至少一列滚动元件。可替代地,轴承可以是滑动轴承,包括直接滑动接触的两个滚道,或环。
Claims (10)
1.一种轴承,包括外环(14)、内环(16)、固定到该外环(14)且与该内环配合的至少一个密封件(22)、以及至少一个密封凸缘(26),该至少一个密封凸缘(26)包括将所述密封凸缘(26)固定到所述内环(16)上的固定部(26a)、端部(26b)、以及连接所述固定部(26a)和该端部(26b)的连接部(26c),其特征在于,所述密封凸缘(26)的端部(26b)是弯曲的,并设置为轴向面对该连接部(26c),所述弯曲的端部(26b)和连接部(26c)限定了朝所述内环(16)径向开放的环形空间(44),所述弯曲的端部(26b)轴向安装为与所述密封件(22)的外侧面(36)接触,
所述密封凸缘(26)包括内侧面(40),该内侧面(40)轴向朝所述密封件(22)定向并且抵靠所述密封件(22),所述密封凸缘(26)通过与所述密封件(22)的接触而轴向地预加载;
所述密封凸缘(26)的端部(26b)在所述密封件(22)上施加永久的轴向载荷;
在预加载状态下所述内侧面(40)一侧上的所述固定部(26a)和弯曲的端部(26b)之间的轴向距离小于所述密封凸缘(26)在自由状态下的所述固定部(26a)和弯曲的端部(26b)之间的轴向距离。
2.根据权利要求1所述的轴承,其中所述密封凸缘(26)在轴向方向上至少可弹性变形,所述凸缘(26)的至少连接部(26c)可通过与该弯曲的端部(26b)和该密封件(22)的轴向接触朝轴承(10)的外部轴向变形。
3.根据权利要求1或2所述的轴承,其中凸缘(26)的固定部(26a)轴向安装为与所述内环(16)的前表面(16c)接触。
4.根据权利要求1或2所述的轴承,其中至少一种润滑剂设置在所述空间(44)内。
5.根据权利要求1或2所述的轴承,其中所述凸缘(26)的弯曲的端部(26b)包括通过所述端部(26b)的厚度构成的至少一个通孔(50),以允许设置在所述空间(44)中的润滑剂向与密封件(22)的轴向接触扩散。
6.根据权利要求1或2所述的轴承,其中所述凸缘(26)的弯曲的端部(26b)具有波纹形状。
7.根据权利要求1或2所述的轴承,其中该密封件(22)包括由柔性材料制成的至少一个密封垫圈(32),并限定外侧面(36),凸缘(26)的至少弯曲的端部(26b)由刚性材料制成。
8.根据权利要求1或2所述的轴承,其中该密封凸缘(26)制成一体。
9.根据权利要求1或2所述的轴承,其中该密封凸缘(26)具有恒定的厚度。
10.根据权利要求1或2所述的轴承,其中该密封凸缘(26)由金属制成。
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FR1553963A FR3035931B1 (fr) | 2015-05-04 | 2015-05-04 | Palier comprenant un flasque d'etancheite |
FR1553963 | 2015-05-04 |
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FR3035931A1 (fr) | 2016-11-11 |
DE102016207675A1 (de) | 2016-11-10 |
US9810265B2 (en) | 2017-11-07 |
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