• 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:
    SUMMARY A device (I) for lubricating a bearing (10) for a shaft (30) rotatably mounted in a housing (20) comprises a sealing portion (42) arranged at the shaft (30) and a cooperating member therewith at the housing (20). arranged sealing portion (44). Lubricant (0) is fed to and removed from the shaft bearing (10) in such a way that a lubricant bath (50) of a certain level is maintained in contact with the shaft bearing (10). The lower part bath (50) is arranged separately from the sealing portions (42, 44) by means of a level regulating means (60; 160). As a result, the lubricant bath can be arranged with the upright hall in contact with the layer without the lubricant bath (50) coming into contact with the sealing portions. This in turn means that the risk of lubricant leaching at the sealing portions (42, 44) is reduced and the friction between the sealing portions (42, 44) can be reduced with the consequence that even loss moments can be reduced.
    公开号:SE1251052A1
    申请号:SE1251052
    申请日:2012-09-19
    公开日:2014-03-20
    发明作者:Vidar Strömbom
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    TECHNICAL FIELD The invention relates to a device for lubricating a bearing for a rotatably mounted shaft mounted in a housing according to the preamble of claim 1. The invention also relates to a motor vehicle.
    BACKGROUND In vehicles such as trucks, axles for example driving are rotatably mounted by axle bearings in a housing. Such bearings require lubrication. In this case, lubricants such as oil are arranged to be carried to and removed from the shaft bearing for lubrication thereof. Such lubricant is normally arranged to be supplied during operation, for example by means of a pump or by stench lubrication by means of gears or the like.
    Furthermore, such lubricant is arranged to be deposited via a return channel arranged downstream of the shaft bearing. In order that the shaft bearing is not to be dry-laid during non-operation, the return channel is arranged at a certain angle so that a lubricant bath with a certain level is maintained in contact with the shaft bearing.
    In order not to oil true dust or the like lacquer to cantilevered components or the like in the housing, the shaft is rotatably mounted, a sealing portion arranged at the shaft and a sealing portion arranged thereby cooperating at the housing is arranged to form a seal. The lubricant bath is arranged between the shaft bearing and the sealing portions, which entails an increased risk of varnishing of lubricant.
    In order to prevent the lubricant from leaking out via the sealing portions, it is required that they are pressed against each other with a certain high force, which results in high friction 2 between the sealing portions. Such a seal with high friction between the seal portions means that the seal exhibits correspondingly high loss moments when the shaft rotates.
    OBJECT OF THE INVENTION An object of the present invention is to provide a device for lubricating a bearing for a shaft rotatably mounted in a housing which enables reduced loss moment during the sealing.
    SUMMARY OF THE INVENTION These and other objects, which will become apparent from the following description, are accomplished by means of a device of the kind initially indicated and further having the features set forth in the characterizing portions of the appended independent claims. Preferred embodiments of the device are defined in the appended dependent claims.
    According to the invention, the objects are achieved with a device where the lubricant bath is arranged separately than the sealing portions by means of a level-regulating member arranged in a space between the shaft bearing and the sealing portions, and that the space comprises at least one drainage opening.
    As a result, the lubricant bath can be arranged with the upright hall in contact with the shaft bearing without the lubricant bath coming into contact with the sealing portions. This significantly reduces the risk that lubricant will leach out via the sealing portions, whereby the friction between the sealing portions can be reduced so that the loss moment can thereby be reduced. Dust and dirt do not require the same level of sealant as lubricants such as oil, whereby sealing with low friction can be achieved so that dirt and the like or the like are prevented from passing through the sealing portions. According to an embodiment of the device, a radially extending space is formed between the level control member and the shaft for said level control. This provides an effective way of maintaining lubricant baths in contact with the shaft bearing separately from the sealing portions.
    According to an embodiment of the device, the sealing portion is comprised of an annular portion of the housing and the level regulating member is comprised of an annular portion of the housing. This facilitates the construction and assembly of the sealing portion and level-regulating means. Furthermore, efficient sealing and effective level control are possible.
    According to an embodiment of the device, the level regulating member forms an integral part of the sealing portion of the housing. As a result, only one piece is required for the sealing portion of the housing and level-regulating means, which reduces the number of components.
    According to an embodiment of the device, the respective annular portions are integrated in a unit. As a result, only one piece is required for the sealing portion of the housing and level-regulating means, which reduces the number of components.
    According to an embodiment of the device, said annular patter constitutes separate units.
    According to an embodiment of the device, the at least one drainage opening is arranged to run substantially radially relative to the axial direction of the shaft. This results in effective level control of the lubricant.
    According to an embodiment of the device, said at least one drainage opening is arranged in the housing substantially at the bottom of the space for drainage with respect to the level-regulating means passed lubricant.
    This avoids the build-up of lubricant baths adjacent to the sealing portions. Furthermore, effective deposition of the lubricant is obtained after lubrication of the shaft bearing. DESCRIPTION OF THE DRAWINGS The present invention will be better understood by reference to the following detailed description of the drawings taken in conjunction with the accompanying drawings, in which like reference numerals appear in equal parts throughout the several views, and in which: Fig. 1 schematically illustrates a motor vehicle according to an embodiment of the invention; Fig. 2 schematically illustrates a cross-sectional view of a device for lubricating a bearing according to an embodiment of the invention; Fig. 3 schematically illustrates a part of the device in Fig. 2; and Fig. 4 schematically illustrates a part of a device for tightening a bearing according to an alternative embodiment of the invention.
    DESCRIPTION OF EMBODIMENTS The following description of exemplary preferred embodiments of the invention is given for illustrative and descriptive purposes. It is not intended to limit the invention to the described embodiments.
    Fig. 1 schematically illustrates a motor vehicle 1 exemplified by a heavy vehicle in the form of a truck. The vehicle can alternatively be a car, a bus, a work vehicle or equivalent. The vehicle is conventionally provided with an internal combustion engine for its propulsion via a driveline comprising gearbox and axles connected thereto. The vehicle comprises a device I for lubricating a bearing for a shaft rotatably mounted in a housing.
    Fig. 2 schematically illustrates a cross-sectional view of a device I for lubricating a shaft bearing 10 for a shaft 30 rotatably mounted in a housing 20, and Fig. 3 shows a part of the device in Fig. 2.
    AxeIn 30 can be constituted by whose rotatable shaft, which is highly suitable, is intended to be mounted arranged in a housing. Axis 30 according to this embodiment comprises a carrier 32 connected in a space of a shaft portion 34 of the shaft 30 via a spline joint 35. The carrier 32 is consequently arranged around the shaft portion 34 and arranged to run along the shaft portion 34. Axine 30 is according to a variant arranged in a motor vehicle. AxeIn 30 is included according to a variant of the motor vehicle's driveline.
    AxeIn 30 is mounted arranged at the housing 20 via the shaft bearing 10. The shaft bearing 10 is formed according to a variant of a conical roller bearing.
    AxeIn 30 is further tatatically arranged at the housing 20 by means of a tatag configuration 40.
    The seal configuration 40 includes a first seal portion 42 disposed at the shaft 30. The first seal portion 42 is fixedly connected to the shaft 30. The first seal portion 42 is comprised of an annular portion of the shaft disposed externally about the shaft 30.
    According to this embodiment, the first sealing portion 42 is arranged at and fixedly connected to the carrier 32.
    The sealing configuration 40 includes a second sealing portion 44 disposed at the housing 20. The second sealing portion 44 is fixedly connected to the housing 20. The second sealing portion 44 is comprised of an annular portion of the housing arranged internally around the housing 20. The second sealing portion is fixedly connected to the housing via a sealing means 44a.
    The first sealing portion 42 arranged at the shaft 30 and the second sealing portion 44 arranged at the housing 20 are arranged to cooperate with each other and thereby form a seal. In this case, the first groove portion 42 is rotatably arranged relative to the second groove portion 44. The first groove portion 42 and the second groove portion 44 are arranged to abut abut against each other when the abutment is formed as a labyrinth, has 6 schematically illustrated as one of the first groove portion 42 radially projecting portion arranged to fit in a radial recess opposite to the second sealing portion 44 running circumferentially. This protects against dirt and dust being passed through the seal configuration 40.
    The shaft bearing 10 is arranged to be lubricated by means of lubricant 0. The lubricant is according to a variant of oil. The lubricant 0 is arranged to be brazed to and removed from the shaft bearing 10 to tighten the same. The lubricant also contributes to cooling the shaft bearing 10.
    The device I for lubricating shaft bearings 10 comprises means 100 for supplying lubricant 0 in the direction of the shaft bearing 10. The means 100 for supplying lubricant 0 comprise according to a variant at least one pump arranged to pound a standard part from a standard part sump in the housing 20. There is a standard part oil, the lubricant sump is consequently constituted by an oil sump.
    According to a variant, the pump is connected to the shaft 30 in such a way that the pump is activated when driving the shaft so that lubricant 0 can be supplied to the shaft bearing when needed, ie. when the vehicle is driven so that the shaft 30 rotates.
    The lubricant 0 is then arranged to be guided via the shaft bearing 10 for, in the case where the shaft bearing consists of a conical roller bearing, utilization of a pump power generated by means of the conical rollers of the conical roller bearing.
    According to an alternative or complementary variant, the means 100 for supplying lubricant comprises gears or the like which are arranged to splash lubricant in the direction of the shaft bearing for lubrication thereof.
    The lubricant 0 is arranged to be conveyed to and removed from the shaft bearing 10 for lubrication thereof in such a way that a lubricant bath 50 of a certain level is maintained in contact with the shaft bearing 10. The lubricant bath 50 is arranged separately from the sealing portions 42, 44 by means of a means the shaft bearing 10 and the sealing portions 42, 44 of the sealing configuration 40, a space 70 being formed between the level regulating member 60 and the sealing configuration 40.
    The space comprises a drainage opening 72. The drainage opening 72 is arranged in the housing 20 substantially at the bottom of the space 70 for drainage with respect to the level regulating member 60 passed lubricant 0.
    The drainage opening 72 is arranged to run substantially radially relative to the axial direction X of the shaft 30.
    A radially extending space S is formed between the level control member 60 and the shaft 10 for said level control.
    The level adjusting member 60 includes a housing 60a projecting at a distance from the shaft bearing 10 to form the space S. The projecting portion 60a is arranged adjacent the drain opening 72 so that lubricant 0 flowing over the projecting portion 60a of the lubricant is lubricated. in the drainage opening 72. Consequently, there is the space S between the projecting portion 60a and the shaft 30 for allowing lubricant 0 to flow therebetween for said level control.
    The projecting portion 60a is arranged to project substantially radially in the direction of the shaft 30 and at a distance than the shaft 30 so that the lubricant 0 in the lubricant bath 50 is allowed to flocculate over and down into the space 70 for the drainage opening 72.
    The device I includes a return channel 74 arranged in the housing 20 in connection with the drainage opening 72 for returning the lubricant 0, for example to a lubricant sump. The return channel 74 is consequently arranged in the bottom of the space 70. The return channel 74 is preferably arranged to initially run substantially vertically through the drainage opening 72 in the bottom of the space 70.
    According to the embodiment shown in Figs. 2 and 3, the level regulating member 60 forms an integral part of the sealing portion of the housing. The level regulating means 60 and 8 the second sealing portion 44 thereby form a level regulating sealing arrangement 80.
    The level regulating means 60 is comprised of an annular portion of the housing 20 arranged internally at the housing 20. The level regulating means 60 is fixedly and tightly connected to the housing 20. The level regulating means 60 is fixedly connected to the housing via a sealing means 60b.
    The level adjusting sealing arrangement 80 comprises an intermediate portion 82 present between the level adjusting member 60 and the second sealing portion 44. The level adjusting member 60 and the second sealing portion 44 together with the intermediate portion 82 as shown in Fig. 3 form a single piece or a single unit. .
    According to the embodiment of Fig. 3, the intermediate portion 82 is annular and fixedly and tightly connected to the housing 20. The annular intermediate portion 82 has openings 82a arranged around it, one of which is intended to form a drainage opening / connection to a drainage opening 72 for connection to the return channel 74 and consequently being oriented at the bottom of the space 70. By having a set of preferably evenly distributed through openings 82a along the circumferential path of the intermediate portion 82, mounting of said integrated level adjusting means 60 and second sealing portion 44 is simplified in that the orientation of the intermediate portion for locating drainage opening is simplified.
    The level adjusting member 60 forms in the level adjusting sealing arrangement 80 a collar portion internally extending around and radially projecting the housing 20.
    According to one embodiment, the level regulating sealing arrangement 80 including the level regulating member 60 and the second sealing portion 44 is constituted by one and the same material. According to one embodiment, the level regulating sealing arrangement 80 including the level regulating member 60 and the second sealing portion 44 comprises a stalk around which vulcanized rubber is arranged for said sealing.
    Fig. 4 schematically illustrates a part of a device for lubricating a bearing for a rotatable bearing shaft axis according to an alternative embodiment of the present invention.
    The embodiment according to Fig. 4 differs from the embodiment according to Figs. 2 and 3 in that the level regulating member 160 constitutes a separate unit and consequently is separate from the second sealing portion 144.
    In this case, the level-regulating member 160 consists of an annular portion intended to be arranged internally at the housing 20. The level-regulating member 160 is intended to be fixed and tightly connected to the housing. Furthermore, the second sealing portion 144 consists of an annular portion intended to be arranged internally at the housing. The second tapping portion 144 is intended to be firmly and tightly connected to the housing.
    The annular level regulating member 160 and the annular second sealing portion 144 are consequently spaced apart, a space 170 being formed therebetween. In this case, the drainage opening is intended to be arranged between the level regulating member 160 and the second sealing portion 144, where the opening is arranged directly in the housing for the return channel.
    With reference to Figs. 2-4, various embodiments of level-regulating means of a device for lubricating a bearing for a shaft rotatably mounted in a housing are described with reference to Figures 2-4.
    According to an alternative variant, the level-regulating member forms an integral part of the housing. In this case, the level regulating means constitutes a radially projecting portion of the housing for said level control.
    AxeIn is, according to the example above, a rotatably mounted shaft in a vehicle in a vehicle. AxeIn can, however, be constituted by any lift required in a housing rotatably mounted shaft where lubrication of bearings is required.
    Above, the space between the level regulating member and the shaft is formed by the level regulating member projecting radially towards the shaft to a distance from the shaft. According to a variant, the shaft has a recess or a step opposite the radially projecting level regulating member so that the radially projecting level regulating member projects the recess at a distance from the bottom of the recess or is level with the surface of the shaft on the side of the recess, where the recess has such an axial extent that the lubricant is allowed to pass the level regulating means via the recess and to the space for discharge via the drainage opening. 11
    权利要求:
    Claims (9)
    [1]
    Device (I) for lubricating a bearing (10) for a rotatably mounted shaft (30) mounted in a housing (20), wherein a sealing portion (42) arranged at the shaft (30) and a cooperating member therewith at the housing (20) arranged sealing portion (44; 144) forms a sealing, lubricant (0) being arranged to be braised and removed from the shaft bearing (10) in such a way that a lubricant bath (50) of a certain level is maintained in contact with the shaft bearing (10), characterized in that the lubricant bath (50) is arranged separately from the sealing portions (42, 44) by means of a level regulating member (60; 160) arranged in a space (70) between the shaft bearing (10) and the sealing portions (42, 44), and that the space ( 70) comprises at least one drainage opening (72).
    [2]
    A device according to claim 1, wherein a radially extending mandrel (S) is formed between the level adjusting member (60; 160) and the shaft (30) for said level adjustment.
    [3]
    The device of claim 1 or 2, wherein said sealing portion (44) is comprised of an annular path of the housing (20) and the level regulating member (60; 160) is comprised of an annular path of the housing (20).
    [4]
    Device according to any one of claims 1-3, wherein the level regulating member (60) forms an integral part of the sealing portion of the housing.
    [5]
    Device according to 3 or 4, wherein the respective annular portions are integrated in one unit.
    [6]
    The device of claim 3, wherein said annular pater constitutes separate units.
    [7]
    A device according to any one of claims 1-6, wherein said at least one drainage opening (72) is arranged to run substantially radially relative to the axial direction (X) of the shaft (30). 12
    [8]
    A device according to any one of claims 1-7, wherein said at least one drainage opening (72) is arranged in the housing (20) substantially at the bottom of the space (70) for drainage with respect to the level regulating member (60; 160) passed lubricant (0) .
    [9]
    Motor vehicle (1) comprising a device (I) according to any one of claims 1-8. 160 170144
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    同族专利:
    公开号 | 公开日
    WO2014046594A1|2014-03-27|
    DE112013004169T5|2015-05-07|
    SE537120C2|2015-01-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4363490A|1980-09-26|1982-12-14|Usm Corporation|Crown roll seal arrangement sealed by lubricating oil in labyrinth|
    US5150975A|1987-02-12|1992-09-29|Hy-Tech Hydraulics, Inc.|Compact self-lubricating bearing system|
    US4998600A|1988-03-09|1991-03-12|Zahnradfabrik Friedrichshafen Ag|Oil lubrication system for the bearing of a shaft journal|
    EP0564873A1|1992-03-24|1993-10-13|Stowe Woodward Ag|Lubrication mechanism for anti-friction bearings|
    IT1293926B1|1997-06-06|1999-03-11|Rft Spa|LUBRICATING OIL LEVELING SYSTEM IN AN OIL-BATH MECHANICAL COMPONENT AND SEALING COMPLEX USABLE|
    法律状态:
    2021-10-12| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1251052A|SE537120C2|2012-09-19|2012-09-19|Device for lubricating shaft bearings|SE1251052A| SE537120C2|2012-09-19|2012-09-19|Device for lubricating shaft bearings|
    PCT/SE2013/051058| WO2014046594A1|2012-09-19|2013-09-11|Device for lubricating shaft bearings|
    DE201311004169| DE112013004169T5|2012-09-19|2013-09-11|Device for lubricating shaft bearings|
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