CN112324804A - 用于车轮轮毂组的密封单元 - Google Patents

用于车轮轮毂组的密封单元 Download PDF

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CN112324804A
CN112324804A CN202010766585.3A CN202010766585A CN112324804A CN 112324804 A CN112324804 A CN 112324804A CN 202010766585 A CN202010766585 A CN 202010766585A CN 112324804 A CN112324804 A CN 112324804A
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sealing unit
hub
roller bearing
centrifugal
front cavity
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达尼埃莱·杜赫
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SKF AB
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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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0073—Hubs characterised by sealing means
    • 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
    • F16C19/02—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
    • F16C19/18—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 two or more rows of balls
    • F16C19/181—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 two or more rows of balls with angular contact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • F16C19/02—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
    • F16C19/18—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 two or more rows of balls
    • F16C19/181—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 two or more rows of balls with angular contact
    • F16C19/182—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 two or more rows of balls with angular contact in tandem arrangement
    • 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
    • F16C19/02—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
    • F16C19/18—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 two or more rows of balls
    • F16C19/181—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 two or more rows of balls with angular contact
    • F16C19/183—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 two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—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 two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7859—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element
    • F16C33/7863—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element mounted to the inner race, e.g. a flinger to use centrifugal effect
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7896—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members with two or more discrete sealings arranged in series
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0005—Hubs with ball bearings
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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  • Engineering & Computer Science (AREA)
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  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Vehicle Body Suspensions (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

一种用于车辆用的车轮轮毂组(50)的密封单元(10)，车轮轮毂组设置有介于用于车辆车轮的旋转轮毂(51)与车辆的立柱的固定销(52)之间的滚子轴承(60)，密封单元进而包括配置在滚子轴承的轴向前部位置的环形前腔(11)、在使用时绕轴线(A)旋转的动态部分(12)以及与动态部分配合以保护滚子轴承免受外部污染物影响的静态部分(13)，动态部分具有形成在轮毂(51)的自由端部上的离心表面(16)，静态部分(13)进而具有固定遮蔽件(80)，固定遮蔽件在前腔(11)内装配到支撑销(52)上并具有面对离心表面(16)的离心部分(85)，以促进将污染物驱逐和排放到环形前腔(11)外。

Description

用于车轮轮毂组的密封单元
技术领域
本发明涉及一种用于车轮轮毂组的密封单元。
背景技术
车辆车轮轮毂组中的滚子轴承需要有效的保护，以免受诸如水、泥土和灰尘的外部污染物的影响，这种滚动轴承介于带外部凸缘的支撑轮毂与车辆的立柱的支撑销之间。
迄今为止，已经通过使用一种密封单元解决该问题，该密封单元包括连接到车轮轮毂的刚性框架和一个或多个动态弹性密封唇，该密封唇由刚性框架支撑并且与支撑销或由支撑销承载的间隔件滑动接触。在使用时，该销是固定的并且由车辆的减震器(shockabsorber)承载。
然而，由于不仅动态弹性密封唇需要通过硫化而被制造在刚性框架上，而且支撑销或由支撑销承载的上述间隔件也需要在与弹性密封唇的接触区域中进行机械表面精加工以限制其磨损，因此上述解决方案的制造成本有些高。
发明内容
本发明的目的在于提供一种密封单元，特别是用于车辆用的车轮轮毂组的密封单元，所述密封单元不具有上述缺点并且较小，特别是在轴向方向上较小；随着时间的流逝，所述密封单元仍是高效且可靠的；很容易组装和拆卸；而且非常简单，制造成本相对较低。
本发明提供一种用于车轮轮毂组的密封单元，其具有在所附权利要求中阐述的特征。
附图说明
下面参照附图描述本发明，附图(图1)以局部截面通过非限制性示例的方式提供本发明的优选实施方式的示意图，并且为了清楚起见，移除了部分。
具体实施方式
参照图1，附图标记10整体上表示用于包括滚子轴承60的车轮轮毂组50的密封单元，所述滚子轴承介于用于车辆车轮(未示出)的外部带凸缘的支撑轮毂51与车辆的立柱(upright)的支撑销52之间。销52和带凸缘的轮毂51两者均是组50的部分，并且如果销52在使用时是固定的(/静止的)(stationary)，则带凸缘的轮毂51可以绕着组50和密封单元10的旋转中心轴线A和对称中心轴线A旋转。滚子轴承60包括外圈61、内圈62和密封装置63，外圈61刚性地连接到轮毂51，内圈62刚性地连接到销52，密封装置63配置在形成于外圈61与内圈62之间的腔64中，以防止诸如水、泥土和灰尘的外部污染物进入滚子轴承60。
考虑到使用车轮轮毂组50的环境在污染物方面特别苛刻，为了给滚子轴承60提供抵抗这种外部污染物的甚至更有效的保护，根据本发明，密封单元10以与密封装置63串联(/成串)并且在密封装置63的轴向前部位置的方式进行有效地配置，由此减少与密封装置63本身接触的泥土的存在，并将已经与密封装置63接触的任何液体污染物有效地排放到滚子轴承60的外部。
根据本发明，密封单元10包括环形前腔(/预先腔)(pre-cavity)11和两个部分12和13，环形前腔11由外部带凸缘的轮毂51和销52限定，并且以与腔64串联(/依序)(inseries)并且在腔64的轴向前部位置的方式进行配置，部分12是被配置为在使用时绕着轴线A旋转的动态部分，而部分13是静态部分并且与动态部分12配合，以实现如上所阐述的单元10的益处。
根据附图，动态部分12包括：
-轮毂51的朝向销52延伸的圆柱形自由端部14，以及
-自由端部14的两个侧向表面15和16，其中，表面15是自由端部14的径向内部圆柱形表面并且在径向外部界定环形前腔11(即，界定环形前腔11的径向外边缘)，而表面16是圆锥形离心表面，其相对于轴线A倾斜，使得其圆锥形状在与滚子轴承60相对的一侧朝向销52敞开(open)。表面16与表面15邻接，并且表面16在与表面15相对的部分上在轴向上由横向于轴线A的环形表面17界定，环形表面17在轴向上界定轮毂51的圆柱形自由端部14。
根据本发明，静态部分13包括刚性的环形遮蔽件(screen)80，环形遮蔽件80沿着圆柱形组件表面53装配到销52，圆柱形组件表面53在径向上面对(/面向)表面15并且在径向内部(/内侧)限定环形前腔11(即，界定环形前腔11的径向内边缘)。环形遮蔽件80包括绕着轴线A配置的四个部分：
-装配部分81，装配到表面53，以将遮蔽件80和销52以给定角度刚性地连接，或者将遮蔽件80保持固定(/静止)，
-第一凸缘部分82和第二凸缘部分83，彼此平行，横向于轴线A，在轴向上配置在部分81的相对两侧并与之刚性连接，其中，第一部分82在径向上短于第二部分83，与通向密封装置63的表面15形成环形窗84，而第二部分83在大体上等于表面15的直径D的尺寸的径向长度上在径向上向外延伸，最后，
-离心部分85，在面对(/面向)锥形表面16的位置从第二部分83延伸，具有与锥形表面16大体上相同的圆锥形状，并且从环形前腔11向外延伸到表面17的轴向边缘，以与锥形表面16限定锥形间隙86，锥形间隙86使环形前腔11与密封单元10的外部连通。
在本发明中，轮毂51绕着轴线A的旋转运动与离心部分85的组合，以及轮毂51绕着轴线A的旋转运动与装配部分81以及第一凸缘部分82和第二凸缘部分83的组合是特别重要的。确实，在使用时，轮毂51绕着轴线A的旋转使已经渗透到环形前腔11内部的任何污染物朝向表面15离心，并且离心部分85的形状(如上所述，与表面16的形状镜像)促进污染物通过间隙86从环形前腔11驱逐(expulsion)和排放(draining)，间隙86的形状(具体地，由离心部分85和表面16确定)最佳地利用(/开发)了轮毂51的旋转的离心作用。应注意，该离心作用在整个表面16(即，绕着轴线A的360°)发生，这在排放和清洁方面具有显著优势。
在这种创新的配置中，作为绕着轴线A旋转并且与污染物接触的结果，表面15与表面16配合以通过离心促使污染物逐渐朝向表面16运动而将污染物驱逐到间隙86的外部。换句话说，表面15可以被理解为是与离心表面16一起工作以有效地从前腔11驱逐和排放污染物的预离心表面(pre-centrifuging surface)。
此外，装配部分81与第一凸缘部分82和第二凸缘部分83的组合赋予刚性遮蔽件80大体上“U”形的形状，其朝向表面15开口(/敞开)，并且该配置与表面15旋转的组合能够在存在于前腔11中或所述“U”形内部的任何污染物内产生湍流(/扰动/干扰)(turbulence)，由此不仅促进污染物朝向表面15进行进一步迁移并且将其通过间隙86驱逐，而且还防止污染物与密封装置63接触，大大提高了密封装置63和滚子轴承60的使用寿命。
从前述内容中显而易见的是，采用简单的刚性的环形遮蔽件80与轮毂51的圆柱形自由端部14的简单机械加工相结合以获得锥形表面16，提供了明显占据较小的轴向空间并且易于制造且制造经济的密封单元10。锥形表面16和在前腔11区域中的圆柱形表面15的动态作用与环形遮蔽件80(特别是离心部分85)的静态作用之间的协同作用，能够在滚子轴承60上实现有效且可靠的密封以及保护作用，随着时间的流逝，该有效且可靠的密封以及保护作用仍被保持，并且不会遭受任何元件的磨损，然而元件的磨损可能会在存在动态弹性密封唇的情况下发生。最后，使用安装在销52上的简单的环形遮蔽件80，不仅确保了密封单元10的非常容易的组装以及潜在的拆卸，而且避免了对销52进行任何机械加工的需要，然而在使用动态弹性密封唇的情况下对销52进行机械加工将是必要的。
除了上面描述的实施方式之外，本发明的许多其他变型是可行的。这种实施方式应被理解为示例，并且不限制本发明的范围、应用或可行的配置。确实，尽管上面提供的描述能够使本领域技术人员至少根据其一个示例性配置来实施本发明，但是可以使用所描述的组件的许多变型，而不会因此落到本发明的范围之外，本发明的范围由所附权利要求书限定、在字面上和/或根据其合法等同物进行解释。

Claims (6)

1.一种用于车辆用的车轮轮毂组(50)的密封单元(10)，所述车轮轮毂组(50)设置有介于用于车辆车轮的旋转轮毂(51)与所述车辆的立柱的固定销(52)之间的滚子轴承(60)，所述密封单元(10)包括环形前腔(11)、动态部分(12)和静态部分(13)，所述环形前腔(11)配置在所述滚子轴承(60)的轴向前部位置处，所述动态部分(12)在使用时绕着轴线(A)旋转，所述静态部分(13)与所述动态部分(12)配合以保护所述滚子轴承(60)免受外部污染物的影响，所述密封单元(10)的特征在于，所述动态部分(12)具有形成在所述轮毂(51)的自由端部上的离心表面(16)，并且，以组合的方式，所述静态部分(13)包括固定遮蔽件(80)，所述固定遮蔽件(80)在所述前腔(11)内部装配到所述支撑销(52)上并且具有面对所述离心表面(16)的离心部分(85)，以促进将污染物驱逐和排放到所述环形前腔(11)外部。
2.根据权利要求1所述的密封单元，其特征在于，所述离心部分(85)和所述离心表面(16)一起限定出锥形间隙(86)，所述锥形间隙(86)使所述环形前腔(11)与所述密封单元(8)的外部联通，或者所述锥形间隙(86)朝向所述滚子轴承(60)的外部敞开。
3.根据权利要求2所述的密封单元，其特征在于，所述动态部分(12)具有形成在所述轮毂(51)的自由端部上的预离心表面(15)，所述预离心表面(15)与所述离心表面(16)配合以将污染物从所述前腔(11)驱逐和排放。
4.根据权利要求3所述的密封单元，其特征在于，所述固定遮蔽件(80)是U形的，并且朝向所述预离心表面(15)开口，以在所述前腔(11)中的任何污染物内产生湍流。
5.根据权利要求4所述的密封单元，其特征在于，所述固定遮蔽件(80)包括装配到所述销(52)的装配部分(81)以及与所述装配部分(81)形成U形遮蔽件(80)的第一凸缘部分(82)和第二凸缘部分(83)，其中，所述第一凸缘部分(82)在径向上短于所述第二凸缘部分(83)，并且所述第一凸缘部分(82)在轴向上面对所述滚子轴承(60)配置。
6.根据权利要求5所述的密封单元，其特征在于，所述离心部分(85)在面对所述离心表面(16)的位置处由所述第二凸缘部分(83)支撑。
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