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WO2004081426A1 - Ensemble joint d'etancheite, essieu de roue et procede de montage de cet ensemble - Google Patents

Ensemble joint d'etancheite, essieu de roue et procede de montage de cet ensemble Download PDF

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Publication number
WO2004081426A1
WO2004081426A1 PCT/SE2004/000357 SE2004000357W WO2004081426A1 WO 2004081426 A1 WO2004081426 A1 WO 2004081426A1 SE 2004000357 W SE2004000357 W SE 2004000357W WO 2004081426 A1 WO2004081426 A1 WO 2004081426A1
Authority
WO
WIPO (PCT)
Prior art keywords
axle
sealing element
seal assembly
annular component
annular
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/SE2004/000357
Other languages
English (en)
Inventor
Tim Kingston
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volvo Construction Equipment AB
Original Assignee
Volvo Construction Equipment AB
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 Volvo Construction Equipment AB filed Critical Volvo Construction Equipment AB
Publication of WO2004081426A1 publication Critical patent/WO2004081426A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • F16J15/3264—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 the elements being separable from each other
    • 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
    • F16J15/3224—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip capable of accommodating changes in distances or misalignment between the surfaces, e.g. able to compensate for defaults of eccentricity or angular deviations

Definitions

  • Seal assembly wheel axle and method for mounting the seal assembly
  • the present invention relates to a seal assembly for sealing an axle, intended for rotation, in an axle case, comprising an annular sealing element.
  • the invention also relates to a wheel axle and a method for mounting the seal assembly.
  • the invention will be described below in a case where the wheel axle is applied in a machine in the form of a frame-steered vehicle, what is known as a dumper. This is not to be regarded as limiting for the invention, but it can also be applied to other types of machine, such as a wheel loader, and other types of vehicle, such as trucks .
  • the wheel axle includes a number of different components, such as gears, brakes and if appropriate clutches, which require lubrication and have different requirements in terms of the properties of the oil .
  • the fact is that the requirements for lubricating oil for the central gear are different from and in certain cases conflicting with the requirements for a brake oil. In certain cases, it is therefore desirable to use different types of oil, each with properties which correspond to the requirements of a specific component.
  • US 5,845,546 describes a wheel axle, where a central gear of hypoid type is arranged in a central space and a clutch is arranged in a delimited space on each side of the central gear space.
  • the central gear space is delimited by an upper and a lower housing part of the axle case.
  • An oil seal is arranged on each side of the central gear space. On the inside, the oil seals bear directly against the axle intended for rotation and, on the outside, against the housing parts.
  • a first object of the invention is to provide a seal assembly which effectively seals two spaces in an axle case off from one another in such a way that different oils can be used in the two spaces.
  • the aim is to produce a seal assembly which effectively seals off the spaces during operation, when the axle moves in the radial direction.
  • the aim is also to produce an assembly which is simple to mount. This object is achieved by virtue of the fact that the assembly comprises a first annular component for rotationally fixed connection to the axle and a second annular component for firm connection to the axle case, that the sealing element is arranged sealingly between the first and second annular components, and that the sealing element is resilient in the radial direction in order to allow radial motion of the axle.
  • the first annular component comprises an inner portion, which is intended to bear against the axle, and an outer portion which is arranged at a distance in the radial direction outside the inner portion, and the sealing element is arranged against the outer portion.
  • the sealing element is preferably firmly connected to a radially inner surface of the outer portion.
  • the second annular component comprises a radially inner portion, and the sealing element is arranged against and radially outside this inner portion. Furthermore, a free end of the inner portion has a reduced diameter for centering of the sealing element during mounting. This results in further improved mounting as far as guiding the sealing element into the intended position is concerned.
  • a second object of the invention is to provide a method for mounting a seal assembly between an axle intended for rotation and an axle case for sealing off two spaces in the axle case, which reduces the risk of damage to the sealing element and affords a high degree of reliability as far as positioning of the sealing element is concerned.
  • the aim is to provide such a method which affords opportunities for what is known as blind mounting inside a housing or case, that is to say in the case of such mounting when the actual sealing area is not visible.
  • first annular component is connected in a rotationally fixed manner around the axle, that a second annular component comprising a seat for a sealing element is fastened in an opening in the axle case, that the sealing element is connected firmly to one of the first and second annular components, and that relative movement of the axle with said first annular component arranged thereon and the axle case in the axial direction is then effected until the sealing element has reached its intended position between the first and second annular components .
  • the sealing element is connected in a rotationally fixed manner to the first annular component before the axle is moved. In this way, the risk of damage to the sealing element during mounting is reduced.
  • splines arranged on the axle at one end thereof, which are intended for a differential are used in order to guide the axle during the relative movement of the axle and the axle case. This provides good, rough guidance of the axle into the correct position of the sealing element between the axle and the axle case.
  • the second annular component comprises a radially inner portion, and the sealing element is arranged against and radially outside this inner portion.
  • a free end of the inner portion has a reduced diameter for centering of the sealing element during mounting. This further improves guidance during mounting.
  • FIG. 1 shows a cross-sectional view through a wheel axle comprising a central gear
  • FIG. 2 shows a diagrammatic cross-sectional view of the seal assembly arranged in the wheel axle.
  • Fig. 1 shows a cross-sectional view of a central gear 1 arranged in an axle case 13 of a wheel axle 2 of a vehicle.
  • a pinion gearwheel 3 is arranged on an input shaft 4 to the central gear 1.
  • the input shaft 4 forms part of what is known as a tandem gear.
  • a shaft (not shown) is arranged in engagement with a gearwheel 5 on the input shaft for transmitting driving power from the engine of the vehicle.
  • the pinion gearwheel 3 is in engagement with a crown gearwheel 6 for transmitting the driving power. From the crown gearwheel 6, the driving power is transmitted via a differential 7 to the driving axles 8, 9 and onward to the driving wheels.
  • Differential means a device which receives a torque from the engine, distributes the torque to the two wheels, and takes up differences in speed of rotation from the wheels, which originate from, for example, the vehicle being turned on a bend.
  • the differential comprises four small conical gearwheels 10, or differential gears, which are arranged on a differential spider.
  • a planetary gear and brake (not shown) arranged at each wheel.
  • the lubricating oil requirements for the central gear 1 are different from and in certain cases conflicting with the brake oil requirements, especially in the present case where hypoid oil is intended to be used for the central gear. It is therefore desirable to use different types of oil for the central gear and the brakes .
  • a space 14 in the axle case 13, in which space the central gear 1 is arranged, is therefore delimited from the remaining space in the axle case. In other words, the central space 14 is delimited in the longitudinal direction of the wheel axle and forms a separate, intermediate space in the axle case.
  • the axle case 13 has a through-opening 15, through which the left driving axle 8 in Figure 1 extends .
  • the opening 15 is essentially circular.
  • a seal assembly 16 is arranged around the axle 8 in order to delimit the central gear space 14.
  • the design of the seal assembly 16 is described below with reference to Figure 2.
  • a corresponding opening in the axle case 13 is present on the right in Figure 1 (not shown) , and a corresponding seal assembly is arranged around the right axle 9 in the figure and in a mirror-inverted way in this opening.
  • the assembly 16 comprises a first annular component 17 for rotationally fixed connection to the axle 8 and a second annular component 18 for firm connection to the axle case 13.
  • Each of the first and second annular components 17, 18 is made of metal material and is thin-walled.
  • the first component 17 forms a sleeve which is press-fitted on the axle 8.
  • the assembly also comprises a sealing element 19 which is arranged sealingly between the first and second annular components.
  • the sealing element 19 is also resilient in the radial direction in order to allow radial motion of the axle 8.
  • the sealing element 19 is fastened to the first annular component 17 and, to be precise, is press-fitted in it.
  • the sealing element 19 has two sealing lips 30, 31 arranged with a mutual spacing against the second annular component 18.
  • Two resilient elements 20, 21 in the form of rings are arranged for resiliently pressing the sealing lips 30, 31 against the second annular component 18. There are thus two contact points for the seal, which are both spring-loaded. This provides a highly effective seal.
  • the rings 20, 21 are preloaded in such a way around the sealing element 19 that they provide the intended, correct pressure in the radial direction.
  • the first annular component 17 comprises an inner portion 23 which bears against the axle 8 and an outer portion 24 which is arranged at a distance in the radial direction outside the inner portion 23.
  • the outer portion 24 is arranged at a distance in the axial direction from the inner portion 23.
  • the first annular component 17 comprises an inclined surface 34, a beveled edge, radially on the outside of a free end 32 of the outer portion 24 for guidance during mounting.
  • the sealing element 19 is fastened on the inside of the outer portion 24.
  • the second annular component 18 has a U-shaped cross section and is arranged with the U lying, so that the opening of the U opens in the axial direction.
  • the sealing element 19 is intended to be arranged inside the U.
  • the second annular component 18 therefore comprises a radially inner portion 25 against which the sealing element 19 is resiliently arranged.
  • a free end 26 of the inner portion 25 has an inclined surface, in this case a portion of reduced diameter, for centering of the sealing element 19 during mounting.
  • the free end 26 tapers conically.
  • a radially outer portion 27 is firmly connected and, to be precise, press-fitted in the opening 15 in the axle case 13.
  • the distance in the radial direction between the sealing lips 30, 31 and a radially outer surface of the outer portion 24 of the first annular component 17 is essentially the same as, or slightly smaller than, the distance in the radial direction between the bent-down portion 26 and the outer portion 27 of the second annular component 18.
  • the sealing element 19 is made of rubber and relatively thin-walled and comprises a curved portion 28, what is known as a bellows, between an outer portion 29 and the inner portion 22 in order to allow radial motion between the outer and inner portions.
  • the sealing element has an S-shaped or Z-shaped cross section.
  • the outer portion 29 is reinforced with a sheet-metal ring vulcanized into the material.
  • the sealing element 19 is fastened to the first annular component 17.
  • the first annular component 17 is then connected in a rotationally fixed manner around the axle 8.
  • the second annular element 18 is fastened in the opening 15 in the axle case 13.
  • the axle 8, with said first annular component 17 and the sealing element 19 arranged on it, is then moved into the opening 15 of the axle case 13.
  • the inner end of the axle 8 is provided with splines for the differential 7. These splines are used in order to guide the axle 8 during the movement and to provide rough centering during the movement.
  • the axle 8 is therefore moved in the axial direction, a free end 32 of the first annular component 17, which end has an inclined surface 34, first being brought into contact with and guided against an end 33, facing the first component 17, of the second annular component 18.
  • the inner portion 22 of the sealing element 19 is brought into contact with the bent-down end 26 of the second annular component 18 and is guided by it toward its intended position.
  • the sleeve 17 therefore meets the component 18 before the sealing element 19 begins to ride on the bent-down end 26 of the component 18.
  • Guidance therefore takes place in three steps: first a rough guidance via splines in the differential, then via outer guidance of the two annular components 17, 18 and finally via inner guidance of the two annular components 17, 18. The axial movement is continued until the sealing element 19 has reached its intended position between the first and second annular components 17, 18.
  • sealing element 19 can be fastened to the first annular component in other ways than by press-fitting, such as by vulcanization or adhesive bonding.
  • the assembly also affords opportunities for detecting leakage via the sealing element 19.
  • a radial hole through the material of the inner portion 25 of the second annular component 18 at the position of the space between the sealing lips,' it is possible to detect any leakage and/or to drain oil off from the space.
  • a thin cylinder with a groove between the axle 8 and the radially inner portion 25 of the second annular component 18 and guide the hose out via this .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Retarders (AREA)

Abstract

L'invention concerne un ensemble joint d'étanchéité (16) servant à étanchéifier un essieu (8) conçu pour effectuer une rotation dans un carter d'essieu (13), cet ensemble comprenant un joint annulaire (19). Cet ensemble comprend, plus particulièrement, un premier élément annulaire (17) s'accouplant rotatif à l'essieu et un deuxième élément annulaire (18) s'accouplant fixe au carter d'essieu. Le joint (19) est placé de façon étanche entre le premier et le deuxième élément annulaire et présente une élasticité dans le sens radial, de manière à permettre à l'essieu de se déplacer dans un sens radial.
PCT/SE2004/000357 2003-03-12 2004-03-11 Ensemble joint d'etancheite, essieu de roue et procede de montage de cet ensemble Ceased WO2004081426A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0300681-4 2003-03-12
SE0300681A SE526108C2 (sv) 2003-03-12 2003-03-12 Tätningsanordning, hjulaxel och förfarande för montering av tätningsanordning

Publications (1)

Publication Number Publication Date
WO2004081426A1 true WO2004081426A1 (fr) 2004-09-23

Family

ID=20290657

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2004/000357 Ceased WO2004081426A1 (fr) 2003-03-12 2004-03-11 Ensemble joint d'etancheite, essieu de roue et procede de montage de cet ensemble

Country Status (2)

Country Link
SE (1) SE526108C2 (fr)
WO (1) WO2004081426A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101900208A (zh) * 2010-07-06 2010-12-01 太原煤气化股份有限公司焦化厂 动静环式骨架密封
US8622644B2 (en) 2010-05-28 2014-01-07 Caterpillar Inc. Seal assembly and method for forming a seal assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE442666B (sv) * 1981-04-15 1986-01-20 Riv Officine Di Villar Perosa Tetningsanordning innefattande en axiell och en radiell lepptetning samt en labyrinttetning
DE4445488A1 (de) * 1993-12-17 1996-06-27 Audi Ag Abdichtung einer Welle in einer Gehäusebohrung
SE517569C2 (sv) * 2001-09-27 2002-06-18 Forsheda Ab Ringformig tätningsanordning

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE442666B (sv) * 1981-04-15 1986-01-20 Riv Officine Di Villar Perosa Tetningsanordning innefattande en axiell och en radiell lepptetning samt en labyrinttetning
DE4445488A1 (de) * 1993-12-17 1996-06-27 Audi Ag Abdichtung einer Welle in einer Gehäusebohrung
SE517569C2 (sv) * 2001-09-27 2002-06-18 Forsheda Ab Ringformig tätningsanordning

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8622644B2 (en) 2010-05-28 2014-01-07 Caterpillar Inc. Seal assembly and method for forming a seal assembly
CN101900208A (zh) * 2010-07-06 2010-12-01 太原煤气化股份有限公司焦化厂 动静环式骨架密封

Also Published As

Publication number Publication date
SE0300681D0 (sv) 2003-03-12
SE0300681L (sv) 2004-09-13
SE526108C2 (sv) 2005-07-05

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