WO2008097175A1 - Agencement de roulement de moyeu et joint d'etancheite de roulement de moyeu - Google Patents

Agencement de roulement de moyeu et joint d'etancheite de roulement de moyeu Download PDF

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Publication number
WO2008097175A1
WO2008097175A1 PCT/SE2008/050106 SE2008050106W WO2008097175A1 WO 2008097175 A1 WO2008097175 A1 WO 2008097175A1 SE 2008050106 W SE2008050106 W SE 2008050106W WO 2008097175 A1 WO2008097175 A1 WO 2008097175A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
hub
shield
shaft end
cavity
Prior art date
Application number
PCT/SE2008/050106
Other languages
English (en)
Inventor
Ulf Samuelsson
Original Assignee
Scania Cv Ab (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scania Cv Ab (Publ) filed Critical Scania Cv Ab (Publ)
Publication of WO2008097175A1 publication Critical patent/WO2008097175A1/fr

Links

Classifications

    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6622—Details of supply and/or removal of the grease, e.g. purging grease
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/001—Hubs with roller-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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6618—Retaining the grease in or near the bearing in a reservoir in the 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller 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
    • 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
    • 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

Definitions

  • the invention relates to a hub bearing arrangement comprising a hub housing, a shaft end, a hub bearing between the hub housing and the shaft end for supporting the hub housing for rotation at the shaft end, a cavity between the hub housing and the shaft end at an inside of the hub bearing, and a seal at the shaft end between the hub bearing and the cavity to prevent transfer of bearing grease between them.
  • the invention also relates to such a seal.
  • the cavity described above between the hub housing and the shaft end is usually partly full of wheel bearing grease.
  • This bearing grease serves as a reserve stock for ensuring that even in difficult operating conditions the hub bearing and an opposite hub bearing situated at a distance receive sufficient lubrication during their service life.
  • the stock of bearing grease forms an annular mass in the cavity within the hub housing and may, upon the development of heat during operation, "bleed" bearing grease to the hub bearings to prevent their possibly running dry and seizing when their local grease stock is used up. Examination of wheel hubs which have completed their service life shows, however, that the reserve stock is most often substantially intact, i.e. not used up. This means not only unnecessary extra costs for the bearing grease itself but also environmental pollution when hubs are scrapped.
  • Such a grease stock in a scrapped hub housing of a truck wheel may comprise approximately a kilogram of bearing grease.
  • this large amount of residual grease may also be due to bearing grease being pushed past the bearing and into the cavity, partly by centrifugal force during operation and partly by extra input during servicing and maintenance.
  • a certain amount of bearing grease may well also bleed in a wrong direction, i.e. into the cavity.
  • a seal of the kind according to the state of the art indicated in the introduction is referred to in US 5 391 004 A. It comprises a sleeve which has, applied at its ends, funnel-shaped sealing elements made of polymer material which abut sealingly against a rotating outer ring of the respective opposite hub bearing.
  • Such a seal protects the hub bearing from foreign particles in the cavity and prevents the bearing grease from reaching the cavity.
  • the bearing grease then spreads instead to a space within the sleeve from which it can be moved back to the hub bearings by centrifugal force from a rotating drive shaft.
  • This solution may, however, prevent superfluous grease from bleeding out to the cavity in the hub housing.
  • An object of the invention is to provide, relative to the state of the art, an alternative seal solution to the problem of overfilling of bearing grease in the hub housing.
  • the seal comprises a shield at an axial distance from the hub bearing and with radial clearance with respect to an adjacent surface of the hub housing.
  • the clearance is suitably dimensioned, it is possible thereby effectively to prevent excessive amounts of bearing grease from being pushed past the bearing and lying inactively in the cavity, while at the same time small amounts of bearing grease are allowed, where necessary, to continue to bleed in both axial directions.
  • the clearance also reduces the risk of overfilling and consequent overheating. Maintaining the bearing grease better at the bearing makes it possible in principle to dispense with the reserve stock. Where applicable, however, a small bleeding reserve of bearing grease may still be allowed to remain in the cavity, to cater for difficult operating conditions and prevent corrosion in the hub housing.
  • the shield has axial wall portions adapted to at least partly maintaining wheel bearing grease between them.
  • these wall portions divide the shield into compartments which may prevent a significant proportion of the bearing grease from being set in motion by the rotation of the bearing and thereby being driven or bleeding out into the cavity.
  • the wall portions may also stiffen the shield so that it can withstand more pressure from the bearing grease.
  • the shield may further be connected to the shaft end via a bearing spacing sleeve.
  • the shield may then also be arranged on a shield retainer which is releasably connected to the bearing spacing sleeve. It will then also be possible to fit the retainer subsequently on an existing hub bearing arrangement.
  • the retainer may be axially located on the bearing spacing sleeve by locking teeth which engage in a recess in the bearing spacing sleeve.
  • FIG. 1 depicts partly in longitudinal section, with portions cut away, a hub bearing arrangement according to the invention.
  • FIG. 2 depicts separately a pair of shield retainers fitted on a spacing sleeve of the arrangement in FIG. 1.
  • the hub bearing arrangement in FIG. 1 designated generally by ref. 10 has in a conventional manner a vehicle wheel hub housing 20 which is supported by a pair of taper rolling bearings 40 for rotation on a rotationally fixed hollow shaft end 30.
  • a drive shaft 32 extends through the shaft end 30.
  • the drive shaft 32 engages drivingly with a conical drive shaft flange 80 which is itself in driving engagement, in a manner not depicted in more detail, with the hub housing 20 in order drivingly to rotate the hub housing 20 about the shaft end 30.
  • Each of the two rolling bearings 40, 40 has in a conventional manner an outer ring 42 and an inner ring 44 between which there are rollers 46.
  • the inner rings 44, 44 are kept at a mutual axial distance by a bearing spacing sleeve 60 on the shaft end 30.
  • a cavity 22 is delineated between, on the one hand, the bearings 40, 40 and, on the other hand, the spacing sleeve 60 and the inside of the hub housing 20.
  • each bearing 40 is filled with an annular mass of wheel bearing grease 70 at the time of delivery of the bearing arrangement.
  • annular mass of wheel bearing grease 70 Conventionally there is also a reserve stock in the form of an annular mass of wheel bearing grease in the cavity 22, as indicated by chain-dotted lines at 70'.
  • annular mass of wheel bearing grease 70" which, by centrifugal force when the drive shaft flange 80 rotates during operation, may be pressed against the outer (in FIG. 1 the left) bearing 40.
  • FIG. 1 also depicts a holder 36 for an undepicted angle sensor.
  • each hub bearing 40 there is at an axial distance from each hub bearing 40, with radial clearance s with respect to an adjacent surface of the hub housing 20, a shield 52 for preventing transfer of bearing grease between the respective bearing 40 and the cavity 22.
  • a shield 52 for preventing transfer of bearing grease between the respective bearing 40 and the cavity 22.
  • the magnitude of the clearance s is dimensioned with advantage to allow the possibility of insignificant pushing of grease through from the outsides of the bearings 40 by great pressure of the bearing grease 70, so that the function of the bearings is not disturbed, but primarily substantially to only allow bleeding of the grease 70 in both directions past the shields 52, 52.
  • each shield 52 in the example depicted takes the form of a radial circular flange connected to the shaft end 30 via the spacing sleeve 60.
  • the shields 52 may be firmly connected to or formed on the spacing sleeve 60, in the example depicted they are each formed on their respective shield retainer 50 made of, for example, plastic.
  • each shield retainer 50 takes the form of a short circular sleeve 54 which can be drawn onto the spacing sleeve 60 and supports the shields 52.
  • a plurality of wall portions 56 distributed round the circular sleeve 54 and directed radially and axially stiffen the shields 52 at the circular sleeve 54 and advantageously divide the shields 52 into divisions or compartments in the circumferential direction.
  • the compartments which face towards the relating bearing 40 enhance the ability of the shields 52 to maintain a local reserve of wheel bearing grease between the shields 52 and the bearings 40 as a result of the grease between the wall portions 52 tending not to be entrained by the rotation of the hub housing 20 and the bearing outer ring 42, and hence also tending not to be pressed out through the gap s by centrifugal force.
  • This grease reserve may instead bleed locally to the respective bearing 40.
  • the compartments alternatively or additionally to be completely or partly enclosed by wall portions 53 directed tangentially and axially, as illustrated in the lower enlargement in FIG. 2.
  • the compartments are thus only open in an axial direction towards the respective bearings 40.
  • each shield retainer 50 has also extending from it a plurality of arms 58 distributed round its circumference and directed axially. At its free end, each arm 58 has a locking tooth 59 which engages with, by snapping into, a recess in the form of a circumferential groove 62 on the spacing sleeve 60 in order to locate the shield retainer 50 axially on the spacing sleeve 60.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Motor Or Generator Frames (AREA)
  • Sealing Of Bearings (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

Agencement de roulement de moyeu avec un logement de moyeu (20), une extrémité d'arbre (30), un roulement de moyeu (40, 40) entre le logement de moyeu et l'extrémité d'arbre afin de supporter le logement de moyeu en rotation au niveau de l'extrémité d'arbre, une cavité (22) entre le logement de moyeu et l'extrémité d'arbre au niveau d'une face interne du roulement de moyeu, et un joint d'étanchéité au niveau de l'extrémité d'arbre entre le roulement de moyeu et la cavité afin d'empêcher le transfert de graisse de roulement entre eux. Le joint d'étanchéité comporte une collerette circulaire (52) à une certaine distance axiale du logement de moyeu (40) et avec un jeu radial (s) par rapport à une surface adjacente du logement de moyeu (20).
PCT/SE2008/050106 2007-02-05 2008-01-28 Agencement de roulement de moyeu et joint d'etancheite de roulement de moyeu WO2008097175A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0700272A SE530742C2 (sv) 2007-02-05 2007-02-05 Navlagerarrangemang och -tätning
SE0700272-8 2007-02-05

Publications (1)

Publication Number Publication Date
WO2008097175A1 true WO2008097175A1 (fr) 2008-08-14

Family

ID=39681959

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2008/050106 WO2008097175A1 (fr) 2007-02-05 2008-01-28 Agencement de roulement de moyeu et joint d'etancheite de roulement de moyeu

Country Status (2)

Country Link
SE (1) SE530742C2 (fr)
WO (1) WO2008097175A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5391004A (en) * 1993-01-15 1995-02-21 Seals-It Hub seal assembly
US6149244A (en) * 1998-05-29 2000-11-21 Consolidated Metco Inc. Wheel hub assembly and method of installing a hub on an axle
US6533363B1 (en) * 2002-02-26 2003-03-18 Meritor Heavy Vehicle Technology, Llc Grease retainer for vehicle wheel hubs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5391004A (en) * 1993-01-15 1995-02-21 Seals-It Hub seal assembly
US6149244A (en) * 1998-05-29 2000-11-21 Consolidated Metco Inc. Wheel hub assembly and method of installing a hub on an axle
US6533363B1 (en) * 2002-02-26 2003-03-18 Meritor Heavy Vehicle Technology, Llc Grease retainer for vehicle wheel hubs

Also Published As

Publication number Publication date
SE530742C2 (sv) 2008-09-02
SE0700272L (sv) 2008-08-06

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