• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SEALING PROVISION FOR BEARINGS The invention briefly refers to a sealing arrangement for sealing a bearing, in particular a wheel bearing, between a first bearing component (30, 32) and a second bearing component (32) , with both bearing components rotating in relation to each other and forming an axial intermediate (61) as a radial intermediate space (60) in relation to a common axis of rotation, the sealing arrangement covering the following: a contact component (14, 24) with a fixture and a contact piece (41, 43), in annular shape, to position the contact component (14, 24) on the second bearing component, and a support (39 , 45) which can be attached to the first bearing component (30, 32) with an elastic part (13, 23) that forms a first sealing lip axial sealing lip (17, 29) and / or a second sealing lip radial seal (19, 36). The instruction according to the invention shows how the service life and the seal can be economically increased. It is proposed that the contact component (14, 24) forms a first collection groove (12, 22) with a part of the second bearing component (31), which extends radially, an end piece (34, 44) ) of the contact component partially limits one (...).
    公开号:BR112013002286B1
    申请号:R112013002286-8
    申请日:2011-05-31
    公开日:2021-01-26
    发明作者:Wilhelm Walter；Alexander Happ
    申请人:Schaeffler Technologies AG & Co. KG；
    IPC主号:
    专利说明:

    [0001] - um componente de contato com uma peça de fixação, de preferência em formato de cilindro oco, para fixação e uma peça de contato para posicionar o componente de contato no segundo componente do rolamento; - um suporte que pode ser fixado no primeiro componente do rolamento com uma peça elástica que forma um primeiro lábio de vedação axial e/ou um segundo lábio de vedação radial. The invention relates to a sealing arrangement for sealing a bearing, in particular a wheel bearing, between a first bearing component and a second bearing component, both bearing components being rotatable with respect to each other and form both an axial intermediate space and a radial intermediate space in relation to a common axis of rotation, the sealing arrangement covering the following: - a contact component with a fixing part, preferably in the shape of a hollow cylinder, for fixing and a contact part for positioning the contact component on the second component of the bearing; - a support that can be fixed on the first component of the bearing with an elastic part that forms a first axial sealing lip and / or a second radial sealing lip.
    [0002] Sealing arrangements with frictional sealing contact of axial and radial sealing lips are commonly used to seal bearings, and the two components of the bearing to be sealed can be arranged facing each other, both radially and axially. . Such a situation arises at many points in mechanical engineering, for example, on machine tools, axles or also on wheel bearings for passenger vehicles or trucks.
    [0003] In the case of JP 2003-56577 it is a wheel bearing, in which the outer ring, as the first component of the bearing, must be sealed in relation to the wheel flange, as the second component of the bearing. For this purpose, a contact plate is provided, which is supported both axially and radially on the wheel hub, as well as on the wheel flange and which are provided in the friction sealing contacts of an axial sealing lip and a sealing lip radial, the sealing lips being supported by a support, which is fixed on an inner radial side of the outer ring.
    [0004] The sealing arrangement of the prior art has disadvantages because external influences can act directly on the sealing lip, causing rapid wear of the sealing lip material, in most cases, an elastomer. If foreign bodies penetrate, such as sand and water, an abrasive effect appears that wears out the sealing lip, generates sutures on the opposite face and thereby reduces the tensioning of the sealing lips. TASK OF THE INVENTION SUMMARY OF THE INVENTION
    [0005] The task of the invention is, therefore, to propose an economical solution of how to increase the service life and sealing performance of a sealing arrangement based on sealing lips without prejudice to the known characteristics of common sealing arrangements.
    [0006] The task is solved by means of a sealing arrangement of the type mentioned above, in which the contact component is provided to form a first collection groove with a part of the second component of the bearing, which extends radially, being a piece of The end of the contact component partially limits an opening that opens into the first collection groove.
    [0007] The opening empties into the first collection groove to ensure that, even in the case of a centrifuge or a water drain, foreign particles or the water itself does not penetrate the sealing arrangement. For this reason, the opening is essentially directed in the axial direction and is also arranged axially in front of the second component of the bearing, such as, for example, a wheel flange. The opening of the opening is radially spaced from the base of the groove in such a way that water and dirt particles can be taken into the collection groove and carried out again, towards the perimeter.
    [0008] The opening is the beginning of a labyrinth seal, which is designed as a non-contact pre-seal and that protects the sealing lips, successive to the labyrinth seal, against external influences. As a result, the labyrinth seal extends from the opening to the first friction seal contact and is shaped by different components of the seal arrangement, among others, by means of the contact component.
    [0009] The two contact components rotatable with respect to each other can be, for example, a fixed outer ring and a rotatable wheel hub arranged on the inner side or an outer ring designed as a wheel hub mounted on a pivot. In both cases, a radial and an axial intermediate space are formed between the bearing components.
    [0010] Preferably, the contact component has a hollow cylinder-shaped fixture for fixing and a ring-shaped contact part for positioning the contact component on the second bearing component. In this way, the contact component can be mounted more easily because it is positioned, with the hollow cylinder-shaped fixture, on the second component of the bearing until it faces and touches a part of the second component of the bearing, that extends radially.
    [0011] The fixing part must be fixed with a snap fit, so that the axial position is not changed later. This would be harmful, as the contact part would no longer be supported on the second component of the bearing and, thus, it would be possible for dirt particles to penetrate into the fastening part. The likelihood of pitting corrosion under the contact component fixing piece would thereby become greater.
    [0012] The support, which can be fixed on the first component of the bearing, has an elastic part, which forms a first axial sealing lip and / or a radial sealing lip. The radial sealing lip and / or at least the axial sealing lip rest against the contact component and form a friction seal there respectively. Advantageously, the contact component can be manufactured from a material that has proven itself to be resistant to the sealing contact, such as stainless steel materials. Alternatively, two axial sealing lips can be provided instead of a radial sealing lip.
    [0013] The first collection groove is formed by the part of the second component of the bearing, which extends radially, and by the part located radially out of the contact component. For this, the part located on the outside may have a cylindrical section and an end piece that joins it, and the end piece must extend, essentially, in the radial one so that water does not penetrate in the opening limited by the piece end point.
    [0014] Advantageously, a part of the bearing component, which forms the first collection groove, contributes to the formation of a labyrinth seal. The end piece of the contact component, located on the outside, constitutes a part of this type, however, it does not necessarily have to remain the only one. With this, a double function is implemented to the contact component, saving material.
    [0015] In an advantageous embodiment, a contact component fixing part is connected, via a connection piece, preferably in conical shape, with a contact component contact part. The connection piece can present, on this occasion, several forms that, given the case, can prove to be advantageous. In any case, a contact of the connecting part is not advantageous, since in this case, it would be necessary to reproduce the exact shape of the second component of the bearing in its curvature. In this case, a conical shape is positive. If it is necessary to generate more space for the sealing arrangement, for example, for another contact surface for a sealing lip, then a rounded shape of the connection piece is proposed. To increase the sealing of the contact component to the second bearing component, the intermediate space, between the connecting part and the second bearing component, can be filled with a sealing material, to prevent moisture from entering the bearing in this location. .
    [0016] In an advantageous design, the contact component is designed to engage radially in the first component of the bearing, with the first component of the bearing partly forming the labyrinth seal. As a result, the first component of the bearing also contributes to the sealing, whereby material can be saved. In addition, this design is advantageous for bearings with very small axial intermediate spaces.
    [0017] In an advantageous embodiment, a cover member, which can be attached to the first bearing member, together with the end piece of the contact member forms the opening. Ideally, the opening should be as small as possible to prevent water and dirt from entering. On this occasion, an annular shape of the opening is advantageous, for example, in the form of an annular slit, as it is linked to a lower manufacturing effort.
    [0018] In an advantageous embodiment, the opening is limited, in part, by an extension of the elastic part and, in parts, by the end part of the contact component and formed by the two joints. This results in the advantage of a reduction in assembly components. Similar to cassette seals, a two-piece sealing arrangement with a contact component and a sealing ring can be made, as a cladding plate is not required on the outside of the first bearing component to form the opening and the maze. Instead, this function is performed by the elastic part, such as, p. ex. , an elastomer.
    [0019] In an advantageous embodiment, a sealing ring is molded on the elastic part. On that occasion, the seal ring forms a non-contact seal of a support fixing piece. In the simplest case, the seal ring could be designed, for example, as 0-ring. The O-ring can be designed, in this case, as a separate part or connected by connecting materials with the elastic part.
    [0020] The sealing ring on the elastic part forms a so-called static seal, since the support fixing part and the first component of the bearing do not rotate in relation to each other. This does not exclude the fact that the seal ring together with the first component of the bearing and the fixing part can be rotated, as is the case, mainly, in utility vehicle applications, but also in passenger cars, in which the The first component of the bearing is formed by an outer ring of the wheel hub, which can be rotated.
    [0021] In an advantageous embodiment, the elastic part forms at least partially the labyrinth seal, together with at least a part of the contact component that forms a first collection groove. The labyrinth seal is a non-contact seal, while the crack to be sealed changes its direction several times. In other words, a labyrinth seal is made up of several slits, which are connected to each other, but are oriented in different directions. The shape of the elastic part and the shapes of the contact component are reconciled in such a way that the labyrinth seal is formed with, as the case may be, different collection elements, such as, for example, a collection groove.
    [0022] Advantageously, the elastic part forms a second collection groove arranged radially inward. The advantage here is that dirt or water that penetrates the labyrinth seal can be collected in the second collection groove and, at the same time, it can leave the labyrinth seal being driven peripherally in the collection groove, through a ring-shaped slit arranged before the second collection slot and through the subsequent opening. It is also advantageous that the contact component, which partially forms the first collection slot, also partially forms the mentioned ring-shaped slot and covers, if necessary, radially the second collection slot.
    [0023] Advantageously, the extension partially covers the second collection slot in the radial. The extension is designed, essentially, in an axial direction, in order to provide a radial coverage of the annular shape or the second collection groove. It is also advantageous if the extension also covers, partially or totally in the radial, the end piece of the 34. This ensures that the opening is directed, essentially, in the radial.
    [0024] Advantageously, the extension has a conical or similarly shaped internal surface at the end of the annular-shaped slot, radially arranged on the outside, so that water, which eventually penetrates the labyrinth seal, can easily drain away from it.
    [0025] If necessary, the extension can also form the part of the sealing arrangement located on the outside, radially as far as possible, so that the water in this extension can drip downwards and so that the water, which can fall from the top side into the sealing arrangement, be kept away from the first collection groove.
    [0026] Other advantageous and preferred constructions of the invention should be taken from the description of the figures and / or the subclaims.
    [0027] In the following, the invention is clarified in greater detail based on the execution examples illustrated in the figures. Show: Fig. 1 is a three-part sealing arrangement with a cover component, and Fig. 2 is a two-part sealing arrangement with a multifunctional elastic part. EXAMPLE OF EXECUTION DESCRIPTION OF THE FIGURES
    [0028] Figure 1 shows a sealing arrangement in three parts with a covering component 10. The sealing arrangement has a friction-free pre-sealing, which is designed as a labyrinth seal and which is formed by the contact component 14, the first component of the bearing 30 and the cover member 10. On that occasion, the cover member 10 is made from a cold-formed metal plate, where an opening 50 0 is arranged at the end of a hollow cylinder-shaped section 52 ring-shaped, which flows into the first collection groove 12 of the contact component 14. Alternatively, the covering component 10 can also be composed of plastic material or be manufactured as a turned part. The cover member 10 also has a fixing piece 47 which is attached, by means of a pressure fit, to an external surface of the first component of the bearing 30, designed as an outer ring.
    [0029] The outer ring forms, for example, at least a part of a wheel hub 30, with which the cover member 10 becomes a type of centrifuge plate, from which, during the rotation operation, the water it is thrown away and kept away from opening 50. Water and dirt particles, which reach the first fixed collection groove 12, are returned, in the direction of the perimeter and drip, with the force of gravity, in the vertical direction, going to the soil surface.
    [0030] In addition, the first groove 12 covers the axial intermediate space 61, which, due to the pre-sealing, in comparison to common sealing arrangements, becomes difficult to access for water and dirt.
    [0031] In the axial intermediate space 61 there is also at least a part of the contact part 41, which joins with the second component of the bearing 31, in a water-tight manner. The second component of bearing 31 is designed, in this execution example, as a fixed pivot.
    [0032] A conical connection piece 18 joins the contact piece 41 with the fixture 40 in the shape of a hollow cylinder, which is fixed, by means of a pressure fitting, mainly in its axial position, so as not to compromise the watertight contact. to the water of the contact part 41. In addition, the connection part 18 forms, together with the sealing lips 16, 17 axial, two friction sealing contacts, which protect the bearing space of the wheel bearing. All sealing lips 16, 17, 19 are formed in an elastic part 13 and can be used, depending on the desired sealing effect, alone and combined in the desired manner. The less sealing lips are used, the lower the friction coefficient of the sealing arrangement.
    [0033] The support 45 is anchored by means of an anchoring body 46 of the elastic part 13 in an internal groove of the first component of the bearing 30. Alternatively, the support 45 can be fixed itself, on the internal surface of the first component of the bearing 30 , by means of a cylindrical pressure fitting. The support 45 and the elastic part 13 together form the sealing ring 11, which can be simply pressed on the first component of the bearing 30. The external radius of the anchor body 46 is actually greater than the radius inner of the first component of bearing 30, but it is possible to press it inwards, without difficulties, due to the elastic property of the anchoring body 46.
    [0034] The axial sealing lip 16, located radially on the outside, forms a first collection groove 15. Water and dirt particles can leave the first collection groove 15, thanks to the force of gravity. This can be intensified if the hollow cylinder-shaped sections 52 of the covering component 10 and the contact component 14 are designed, at least minimally, with a tapered shape on the inside, which provides a better flow.
    [0035] Figure 2 shows a two-part sealing arrangement with a multifunctional elastic part 23. The elastic part performs the function of the covering component 10 of figure 1. For this reason, the support 39 of the elastic portion 23 is fixed, by means of a press fit, on an external surface of the first component of the bearing 32. To avoid a pitting corrosion under the fastening part 48 of the support 39, a so-called static seal is formed by means of the seal 25 in an adapted form without friction, when it presents an essentially annular shape and is supported radially or in a external groove of the first bearing component 32.
    [0036] If the sealing arrangement is to be used on a passenger vehicle, the first component of the bearing 32 corresponds to a fixed outer ring, with which the friction-free seal 25 is also a fixed seal. Thus, the second component of the bearing 31 constitutes a wheel hub with a part extending in the radial direction, which is formed by the wheel flange.
    [0037] The covering component 24 is similarly attached to the second component of the bearing 31, like the bearing component 41 of figure 1, however the covering component 24 is intended to rotate during operation. As a result, the end piece 34 starts to have a centrifugation effect, and this centrifugation effect prevents dirt and water from entering the opening 51. Advantageously, the end piece 34 forms an edge for this purpose. opening which is implemented, if necessary, by a slight chamfer on the end piece 34.
    [0038] As the opening 51 is oriented axially in the direction of the wheel flange, it can advantageously be prevented that water flowing in the radial directions from penetrating the labyrinth seal. Advantageously, extension 26 is formed in such a way that it has the largest external radius of the sealing arrangement, so that dirty water can drip down it. In addition, it covers an annular-shaped slot, which flows into the second collection groove 27. The annular shape of the slot ensures that dirt and water, which may penetrate, can leave the labyrinth seal without difficulty through the opening 51. The second collection groove 27 can be formed by an axial non-contact sealing lip, the end of which is directed outwardly, in the radial direction and forms, together with the base of the first collection groove 22, located radially on the inside, another sealing element of the labyrinthine seal, in the form of a second annular opening.
    [0039] In order for the elastic part 23 to take on so many functions, it extends from the axial end of the fastening member 48 to the end of the support 39, located radially on the inner side, and it covers the support 39 in the radial direction, outwards, and it is axially disposed between the contact component 43 and the support 39. Alternatively, the respective functions can also be performed by separate, assembled elastic parts, but this would result in greater production work.
    [0040] The sealing arrangement has an axial sealing lip 29 and a radial sealing lip 36, which together with the contact component 24, as well as the corresponding connection piece 38 and the fixing piece 37, form a sealing contact by friction.
    [0041] The sealing arrangement of figure 2 is located outside the radial intermediate space 60, which is kept open by the first component of bearing 32 and the second component of bearing 31. Advantageously, in the first component of bearing 32, less need to be taken measures that allow the use of the sealing arrangement. It is only advantageous to have an external groove for the non-contact seal 25, however, it is not mandatory. In addition, there are advantages in installing the sealing arrangement, due to the two-part structure, as a separate cover component is dispensed with.
    [0042] The sealing ring 21, which covers the elastic part 23 and the support 39, takes on, in addition to the usual functions of a sealing ring, the tasks of forming, at least partially, a pre-seal in the form of a labyrinthine seal, as well as such as that of making an external static seal in relation to the first component of the bearing 32. Also the contact component 24, which is advantageously manufactured in the same way as the support 39, from a metal plate, assumes another function of waterproofing in addition to the already known functions of a contact plate, when forming the first collection groove 22 in the axial intermediate space 61.
    [0043] The execution examples of the two figures can be used both for a first component of the rotating bearing 30, 32, as well as for a first component of the fixed bearing 30, 32. This means that the sealing arrangements according to the invention can be used, to the same extent, in wheel bearings for trucks, as well as for passenger vehicles, regardless of whether the respective wheel bearing is designed in order to perform a rotation internal or external.
    [0044] In summary, the invention relates to a sealing arrangement for sealing a bearing, in particular a wheel bearing, between a first and a second bearing component, both bearing components being rotatable with respect to each other and forming both an axial intermediate space as a radial intermediate space in relation to a common axis of rotation, the sealing arrangement covering the following: a contact component with a fixing part, preferably in the shape of a hollow cylinder, for fixing and a contact piece, in annular shape, for positioning the contact component on the second component of the bearing, and a support that can be fixed on the first component of the bearing with an elastic part that forms a first axial sealing lip and / or a second lip radial seal. The instruction according to the invention shows how the service life and the seal can be economically increased. It is proposed that the contact component forms a first collection groove with a part of the second bearing component, which extends radially, with an end piece of the contact component partially limiting an opening that opens into the first collection groove. With this, it is possible to establish a labyrinth seal as a pre-seal, which effectively collaborates in waterproofing, without additional friction losses. List of reference numbers
    [0045] 10 cover component 11 sealing ring 12 first collection slot 13 elastic part 14 contact component 15 second collection groove 16 axial sealing lip 17 axial sealing lip 18 connection piece 19 radial sealing lip 21 sealing ring 22 first collection groove 23 elastic part 24 cover component 25 non-contact seal 26 extension 27 second collection groove 28 radial end piece 29 axial sealing lip 30 first bearing component 31 second component of bearing 32 first component of bearing 34 end piece 35 intermediate piece in annular shape 36 radial sealing lip 37 fixing part 38 connection piece 41 contact piece 43 contact piece 44 end piece 45 support 46 anchoring body 47 fixture 48 fixture 50 opening 51 opening 52 hollow cylinder-shaped section 60 radial intermediate space 61 axial intermediate space
    权利要求:
    Claims (12)
    [0001]
    SEALING DEVICE FOR SEALING A BEARING, said sealing device being between a first support member (30, 32) and a second support member (31), where the two support members (30, 31, 32) can rotate in relation to each other, and not only is the axial intermediate space built on the common axis of rotation (61) but also, a radial intermediate space (60) is built, in which the sealing device comprises the following: - contact parts (14, 24) with fixings for fixing parts (37, 40) and ring-shaped contact parts (41, 43) to position the contact members (14, 24) on the second support member ( 31); - a support (39, 45) capable of being fixed to said first support member (30, 32), with the elastic parts (13, 23) forming a first axial sealing lip (17, 29) and / or a lip radial seal (19, 36), characterized by the contact member (14, 24) being provided to form a first collection groove (12, 22) together with a radially extending portion of the second support member, wherein the contact members (14, 24) of the part end (34, 44) partly form a boundary of an opening (50, 51) that opens to the first collection groove (12, 22), and the opening part (51) is restricted by the extension (26) of the elastic member (23).
    [0002]
    SEALING DEVICE, according to claim 1, characterized in that at least one of said contact members (14, 24) that forms part of the first collection groove together form a labyrinth seal.
    [0003]
    SEALING DEVICE, according to any one of the preceding claims, characterized in that the fixing parts (37, 40) of the contact parts (14, 24) are connected to the contact parts (14, 24) by means of the connection parts ( 18, 38) of the contact part (41, 43).
    [0004]
    SEALING DEVICE, according to claim 2, characterized in that the contact member (14) is provided to radially surround the first support member (30), in which the first support member (30) partially configures the labyrinth seals.
    [0005]
    SEALING DEVICE, according to claim 1 or 2, characterized by the cover member (10) capable of being attached to the first support member (30) to build the opening (50, 51) together with the end member (44) ).
    [0006]
    SEALING DEVICE according to claim 1, characterized in that a sealing ring (25) is formed on the elastic member (23), and the sealing ring (25) has a non-rectifying seal that forms a fixing member (48 ) of the support (39).
    [0007]
    SEALING DEVICE, according to claim 1 or 6, characterized in that at least one of the elastic members (23) and the contact members (14, 24) is formed and the parts that form the first collection groove (22) together they build at least partially a labyrinth seal.
    [0008]
    SEALING DEVICE, according to claim 1 or 2, characterized in that the elastic member (23) is configured as a second collection groove (27) which is radially incorporated in the first collection groove (22).
    [0009]
    SEALING DEVICE, according to claim 8, characterized by the extension (26) partially covering the second collection groove (27) radially.
    [0010]
    SEALING DEVICE according to claim 1, characterized in that the sealing device is a sealing device for sealing a wheel bearing.
    [0011]
    SEALING DEVICE, according to claim 1, characterized in that the fixing member (37, 40) has a hollow cylindrical shape.
    [0012]
    SEALING DEVICE, according to claim 3, characterized in that the connection piece (18, 38) is configured conically.
    类似技术:
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    同族专利:
    公开号 | 公开日
    JP2013534301A|2013-09-02|
    BR112013002286B8|2021-03-09|
    JP5901632B2|2016-04-13|
    BR112013002286A2|2016-05-24|
    US20130127119A1|2013-05-23|
    KR101829084B1|2018-03-29|
    CN103052819A|2013-04-17|
    CN103052819B|2016-06-01|
    EP2603708A1|2013-06-19|
    DE102010034385A1|2012-02-16|
    RU2013110823A|2014-09-20|
    WO2012019803A1|2012-02-16|
    KR20130098302A|2013-09-04|
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    法律状态:
    2017-11-07| B25A| Requested transfer of rights approved|Owner name: SCHAEFFLER TECHNOLOGIES AG AND CO. KG (DE) |
    2017-11-21| B25D| Requested change of name of applicant approved|Owner name: SCHAEFFLER TECHNOLOGIES AG AND CO. KG (DE) |
    2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-19| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-11-10| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-01-26| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 31/05/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    2021-03-09| B16C| Correction of notification of the grant|Free format text: REF. RPI 2612 DE 26/01/2021 QUANTO AO INVENTOR. |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102010034385.4|2010-08-13|
    DE102010034385A|DE102010034385A1|2010-08-13|2010-08-13|Sealing arrangement for rolling bearings|
    PCT/EP2011/058883|WO2012019803A1|2010-08-13|2011-05-31|Sealing assembly for a rolling bearing|
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