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WO2007006527A1 - Soufflet, notamment pour un arbre auquel un moyeu est relie de maniere fixe - Google Patents

Soufflet, notamment pour un arbre auquel un moyeu est relie de maniere fixe Download PDF

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Publication number
WO2007006527A1
WO2007006527A1 PCT/EP2006/006726 EP2006006726W WO2007006527A1 WO 2007006527 A1 WO2007006527 A1 WO 2007006527A1 EP 2006006726 W EP2006006726 W EP 2006006726W WO 2007006527 A1 WO2007006527 A1 WO 2007006527A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
bellows
hub
expansion
inner diameter
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/EP2006/006726
Other languages
German (de)
English (en)
Inventor
Markus Deisinger
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.)
GKN Driveline International GmbH
Original Assignee
GKN Driveline International GmbH
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 GKN Driveline International GmbH filed Critical GKN Driveline International GmbH
Publication of WO2007006527A1 publication Critical patent/WO2007006527A1/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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
    • F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
    • 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
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/04—Bellows
    • F16J3/041—Non-metallic bellows
    • 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
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/04—Bellows
    • F16J3/041—Non-metallic bellows
    • F16J3/043—Non-metallic bellows with particular means for limiting wear

Definitions

  • the present invention relates to a bellows, in particular for a shaft having at least one hub fixedly connected thereto, comprising a fold region and a collar region facing the shaft, and a method for fastening such a bellows and its use.
  • bellows are often selected according to the prior art, whose shaft-side collar portion already has a relatively large inner diameter, so that here a less strong expansion when mounted on a fixed shaft-hub connection is made possible with correspondingly reduced risk of previous damage.
  • the disadvantage however, that subsequent to the attachment of the same by means of a conventional clamping means, in particular a tension band, on the shaft leaks can occur through the choice of the larger inner diameter of the shaft-side collar portion of the bellows, as in of all rule then the inner diameter of the shaft-side collar portion of the bellows is not insignificantly larger than the outer diameter of the shaft. This can lead to local accumulation of material when mounting the shaft-side collar area on the shaft by means of a tension band, whereby the risk of leakage is given.
  • Solid shaft-hub connection in the sense of the present invention means that a shaft is connected to at least one ball hub, for example by welding or the like, so that here a one-piece connection is formed. Of course, it may also be provided to produce the shaft in one piece with at least one ball hub. All sorts of possible connection methods between a shaft and ball hub fall within the meaning of the present invention under the concept of the fixed shaft-hub connection, including mechanical connections, in particular by means arranged in the shaft or hub connection means, especially those, the subsequent maintenance do not need or can not be opened again.
  • a bellows in particular for a shaft with at least one fixedly connected hub, comprising a fold region and a shaft region facing the shaft, wherein the inner diameter d
  • the aforementioned parameters relate to a bellows prior to expansion and mounting on in particular a fixed shaft-hub connection.
  • of the waistband region by at least about 8%, more preferably at least about 10% smaller than the outer diameter d w of the shaft.
  • of the waist region by at least about 70%, more preferably at least about 90% smaller than the outer diameter of the hub d N.
  • the inventors of the present invention have recognized that, contrary to the usual assumption of choosing a larger inner diameter of the shaft-side waistband region of the bellows, it is more advantageous if it is chosen smaller than the outer diameter d w of the shaft. This advantageously achieves that below the expansion and assembly of the bellows in particular a solid shaft hub connection by means of a clamping means the shaft-side waistband area can be firmly, securely and sealingly mounted on the shaft.
  • the wavy waistband when radially expanded by at least about 25%, preferably at least about 50% after relaxation, is at most about 20%, more preferably at most about 15%, even more preferably at most about 10%. larger inner diameter di on.
  • the relaxation time should last at least 5 seconds, more preferably at least about 10 seconds.
  • the radial expansion can preferably take place by at least about 70%, more preferably by at least about 90%.
  • the bellows is made of a thermoplastic elastomeric material, which is more preferably a copolyester. Even more preferably, the thermoplastic elastomeric material is partially crystalline and / or crystalline Nn, at least in partial regions of the polymer network structure formed.
  • This partial crystallinity or crystallinity of the thermoplastic elastomeric material of the bellows according to the invention advantageously results in at least about 50%, preferably at least about 70%, even more preferably at least about 90% for mounting on, in particular, a fixed one after an expansion of the shaft-side waistband region of the bellows Shaft-hub connection the material still has sufficient elastic properties and has only a small proportion of plastic properties.
  • the plastic strain rate of the thermoplastic elastomeric semi-crystalline or crystalline material is responsible for the fact that the inner diameter d
  • the thermoplastic elastomeric material is a copolyester prepared by copolymerizing polyethylene terephthalate with a hydroxyl group-substituted organic acid, in particular p-hydroxybenzoic acid or its derivatives and related organic acids, or cocondensation of polybutylene terephthalate and oligomeric and / or polymeric ethers ,
  • the present invention relates to a method of attaching a bellows to a shaft having at least one hub fixedly connected thereto, wherein a waistband portion of the bellows facing the shaft is radially expanded by at least about 5% at a temperature equal to or less than about 100 ° C, wherein the elongation time is equal to or less than about 100 seconds, more preferably equal to or less than about 10 seconds, even more preferably equal to or less than about 1 second.
  • the temperature during the radial separation is preferably equal to or less than about 80 0 C, more preferably equal to or less than about 50 0 C, even more preferably equal to or less than about 30 0 C. If the aforementioned temperature and time parameters simultaneously tur- adhered to, by means of the method according to the invention, on the one hand, an at least significant reduction, if not complete avoidance of pre-damage of the bellows avoided, further, the wave-side waistband of the bellows after application to the fixed shaft-hub connection safely with this and above all Things sealingly fixable by means of a clamping means.
  • a radial expansion is achieved, for example, by pulling the bellows over an expanding body, in particular a conical body, in particular a circular cross-section, the diameter of the conical body expanding in the pulling direction.
  • the expansion takes place up to a diameter which is equal to or greater than the outer diameter of the hub d N.
  • the conical body may be made of any type of material, but is preferably formed of a metallic material, more preferably made of a steel, and further preferably formed solid, and is optionally provided with a cooling.
  • the bellows and / or the shaft and / or the hub and / or the Aufdehn emotions which may be formed in particular conical, provided before expansion with a grease.
  • a grease all known from the prior art and suitable for joint components greases can be used.
  • greases are preferably used which are based on a base oil, in particular a mineral or paraphenic oil, mixed with a lithium soap or a urea derivative, in particular a diurea, triurea, tetraurea or polyurea derivative as thickener, which furthermore advantageousously, as auxiliaries molybdenum sulfite or Molybdänorganoeducationen such Molybdändithiocarbamat and sulfur-nitrogen or sulfur phosphorus compounds, in particular dithiazoles.
  • the radial expansion of the wave-side collar area can be based on Ren suitable aids, or be made without aids with sufficient elasticity of the bellows material used.
  • the present invention relates to the use of a bellows according to the invention for mounting on a shaft with at least one hub fixedly connected thereto, preferably with two hubs fixedly connected thereto, in particular ball hub.
  • Fig. 1 a view of a fixed shaft-hub connection with bellows
  • Fig. 2 a shaft with two fixedly connected to this ball hub
  • FIG. 3 shows a sectional view of a bellows according to the invention
  • Fig. 4 a plot of an elongation and a tension of a thermoplastic elastomeric material in the form of a longitudinally cut bottle according to
  • FIG. 5 is a plot of the total strain theoretically obtained from FIG. 4 against the plastic strain fraction in an extrapolation
  • Fig. 6 a plot of the output inner diameter of the shaft side
  • Fig. 7 an expansion body, conically shaped, for expanding the bellows according to the invention.
  • Fig. 1 shows for better understanding of the subject matter of the present invention in a view a shaft 16 with arranged at both ends of ball hubs 18.1 and 18.2.
  • the ball bosses 18.1 and 18.2 are firmly connected to the shaft 16 by welding and subsequent hardening.
  • an outer joint part 20 is also already arranged, which is in communication with a bellows 10 via the joint-side collar region.
  • a wave-side collar region 14 of a bellows 10 stands with the shaft 16 in connection.
  • This connection can be done in particular by a not shown here in detail clamping means, in particular clamping band. For simplicity, these are also not shown on the outer joint part 20 and the shaft 16 binder for fixing the bellows 10 in Fig. 1.
  • outer joint part 20 is shown in the unmounted state at the right end of the shaft 16 as shown in FIG. 1 of the bellows 10.
  • the shaft 16 has an outer diameter d w
  • the hubs 18.1 and 18.2 have an outer diameter d N.
  • Fig. 2 shows to further illustrate the reproduced in Fig. 1 shaft 16 with the fixed thereto by welding and hardening ball hubs 18.1 and 18.2.
  • the collar region 14 has an inner diameter d
  • is in the context of the present invention, about 10% smaller than the outer diameter d w of the shaft 16 and about 95% smaller than the outer diameter d N of the hub 18.1 or 18.2.
  • Figure 4 now shows a stress-strain curve obtained from measurements of a thermoplastic elastomeric, semi-crystalline copolyester (Arnitel EB463, DSM Engineering Plastics, Sittard, The Netherlands). Measurements were made in accordance with DIN 53504-S 2, but with stretching not to break but to 6 cycles of elongation and release with a respective increase in maximum elongation in each cycle of 10%. The measurements were carried out on bottle-shaped test specimens produced from said thermoplastic elastomeric material, which were cut longitudinally.
  • Expansions were from 0% to 5%, 0% to 10%, 0% to 15%, 0% to 20%, 0% to 30%, 0% to 40%, 0% to 50% and 0% to 60 % Elongation, wherein the expansion time was 5 mm / min.
  • FIG. 4 shows a hysteresis-like course of the recorded measurement curves, from which, inter alia, a plastic strain fraction can be extracted.
  • FIG. 5 can be seen that with an expansion of approximately 77%. a plastic elongation of 20% is present. This would mean that after a total expansion of about 77%, a bellows having an original inside diameter of the wave-side waistband area of about 34 mm after elongation has a width of about 40.8 mm. This can be seen, for example, in FIG. 6, which is shown in FIG.
  • FIG. 7 shows an expansion means 30 (expanding body) suitable for achieving a radial expansion, which has a conical body whose diameter widens in the direction of the arrow 32.
  • the expanding agent 30 was used in the following example for expanding the bellows 10 according to the invention, produced from a thermoplastic, partially crystalline material.
  • the diameter in the head region 34 of the expansion means 30 was about 26 mm, whereas the diameter in the foot region 36 of the expansion means 30 was about 60 mm. example
  • of the wave-side collar region were obtained after expansion at expansion times of about 100 seconds or about one second, which are well below the theoretically determined diameter of about 35 mm. It has proven to be particularly advantageous when the temperatures are chosen to be relatively low, at which the expansion takes place, and when the expansion time is a maximum of about 100 seconds, preferably equal to or less than 1 second. Relaxation time in the sense of the present invention refers to the period after completion of the expansion by means of, for example, the expansion agent 30. Surprisingly, according to the method of the invention, values for the inner diameter d
  • an inventive bellows 10 could be provided, which has an inner diameter d

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

L'invention vise à fournir un soufflet, notamment pour une liaison arbre-moyeu fixe, qui ne présente qu'un pré-endommagement réduit après un étirement d'au moins 50 % environ et qui peut néanmoins être fixé de manière solide, sûre et étanche sur un arbre. A cet effet, le soufflet selon l'invention comprend une zone de plis ainsi qu'une zone de collier orientée vers l'arbre, le diamètre intérieur de la zone de collier côté arbre étant inférieur d'au moins environ 5 % au diamètre extérieur de l'arbre et d'au moins environ 25 % au diamètre extérieur du moyeu.
PCT/EP2006/006726 2005-07-12 2006-07-10 Soufflet, notamment pour un arbre auquel un moyeu est relie de maniere fixe Ceased WO2007006527A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005032899.7 2005-07-12
DE102005032899A DE102005032899B4 (de) 2005-07-12 2005-07-12 Verfahren zur Befestigung eines Faltenbalges auf eine Welle mit mindestens einer fest verbundenen Nabe

Publications (1)

Publication Number Publication Date
WO2007006527A1 true WO2007006527A1 (fr) 2007-01-18

Family

ID=37402250

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/006726 Ceased WO2007006527A1 (fr) 2005-07-12 2006-07-10 Soufflet, notamment pour un arbre auquel un moyeu est relie de maniere fixe

Country Status (2)

Country Link
DE (1) DE102005032899B4 (fr)
WO (1) WO2007006527A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994020259A1 (fr) * 1993-03-12 1994-09-15 Weaver Bruce W Dispositif permettant le positionnement d'une enveloppe de joint homocinetique
EP0669486A1 (fr) * 1994-02-24 1995-08-30 Draftex Industries Limited Soufflet de protection
EP0784079A2 (fr) * 1995-11-16 1997-07-16 Nok Corporation Composition de polyéther ester elastomère pour soufflet d étanchéité de joint homocinétique.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29517117U1 (de) * 1995-10-28 1996-01-11 Möller Plast GmbH, 33649 Bielefeld Flexibles Formteil
GB2364751B (en) * 1999-04-26 2003-03-26 Phillip Fields Hayward A method for installing a protective gaiter around a joint

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994020259A1 (fr) * 1993-03-12 1994-09-15 Weaver Bruce W Dispositif permettant le positionnement d'une enveloppe de joint homocinetique
EP0669486A1 (fr) * 1994-02-24 1995-08-30 Draftex Industries Limited Soufflet de protection
EP0784079A2 (fr) * 1995-11-16 1997-07-16 Nok Corporation Composition de polyéther ester elastomère pour soufflet d étanchéité de joint homocinétique.

Also Published As

Publication number Publication date
DE102005032899A1 (de) 2007-01-18
DE102005032899B4 (de) 2011-06-16

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