DE2945234A1 - Universal joint protective elastic sleeve - has bellows flanks at different cone angles and with different wall thicknesses - Google Patents

Universal joint protective elastic sleeve - has bellows flanks at different cone angles and with different wall thicknesses

Info

Publication number
DE2945234A1
DE2945234A1 DE19792945234 DE2945234A DE2945234A1 DE 2945234 A1 DE2945234 A1 DE 2945234A1 DE 19792945234 DE19792945234 DE 19792945234 DE 2945234 A DE2945234 A DE 2945234A DE 2945234 A1 DE2945234 A1 DE 2945234A1
Authority
DE
Germany
Prior art keywords
flanks
wall thickness
folds
joint
bellows
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.)
Withdrawn
Application number
DE19792945234
Other languages
German (de)
Inventor
Leopold F. 7000 Stuttgart Schmid
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19792945234 priority Critical patent/DE2945234A1/en
Publication of DE2945234A1 publication Critical patent/DE2945234A1/en
Withdrawn legal-status Critical Current

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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/22—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts
    • F16D3/224—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts the groove centre-lines in each coupling part lying on a sphere

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Diaphragms And Bellows (AREA)
  • Sealing Devices (AREA)

Abstract

The protective sleeve of elastic material is particularly for the universal joint driving the wheels of a motor vehicle, being in the form of a bellows with peripheral radial folds. The flanks (4,5;6,7) of the folds form cone surfaces at different angles (19,20) to the joint, the wall thickness (18) of the flanks at the smaller angle being greater than that (17) of those at the greater one. Protecting rings (8) can protrude from the thicker-walled flanks (6), masking the intervening spaces (15) between the folds in the axial direction (16).

Description

Gelenkschutzhülle aus einem elastisch Joint protection cover made of an elastic

verformbaren Werkstoff Die Erfindung betrifft eine Gelenkschutzhülle aus einem elastisch verformbaren Werkstoff, insbesondere für Drehgelenkkupplungen zum Antrieb der Räder eines Kraftfahrzeuges, welche als Faltenbalg mit radial umlaufenden Falten ausgebildet ist. deformable material The invention relates to a joint protection sleeve made of an elastically deformable material, especially for swivel joints to drive the wheels of a motor vehicle, which are designed as bellows with radially circumferential Wrinkles are formed.

Der Erfindung liest die Aufgabe zugrunde, eine Gelenkschutzhülle der vorgenannten Art so weiterzuentwickeln und zu verbessern, dass ohne einen Mehraufwand an elastisch verformbarem Werkstoff eine wesentliche Verlängerung der Lebensdauer im allgemeinen und eine wesentliche Erhöhung der Steinschlagsicherheit im besonderen zusammen mit einer wesentlichen Verringerung des Volumens des zur Schmierung der Drergelenkkupplung erforderlichen Schmiermittels erreicht werden.The invention reads the object of a protective joint cover The aforementioned type to be further developed and improved without any additional effort on elastically deformable material a significant extension of the service life in general and a significant increase in stone chip security in particular along with a substantial reduction in the volume of the lubricant Rotary joint coupling required lubricant can be achieved.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass die Flanken der radial umlaufenden Falten des Faltenbalges Kegelmäntel bilden, die sich mit verschieden grossen Kegelwinkeln zur umhüllten Drehgelenkkupplung hin verjüngen, und dass die Wanddicke der Flanken mit dem kleineren Kegelwinkel grösser ist als die Wanddicke der Flanken mit dem grösseren Kegelwinkel. Hierbei wachsen aus den Flanken mit der grösseren Wanddicke Schutzringe heraus, welche die Zwischenräume zwischen den Falten axial abdecken.According to the invention, this object is achieved in that the flanks the radially circumferential folds of the bellows form cone shells, which are joined with taper cone angles of different sizes towards the wrapped swivel joint, and that the wall thickness of the flanks with the smaller cone angle is greater than the wall thickness of the flanks with the larger cone angle. Here grow from the Flanks with the greater wall thickness, protective rings, which the gaps cover axially between the folds.

Diese Diese erfindungsgemässe Gestaltung bringt nicht nur technische sondern auch wirtschaftliche Vorteile mit sich, weil die wesentliche Verlängerung der Lebensdauer im allgemeinen und die wesentliche Erhöhung der Steinschlagsicherheit im besonderen ohne einen Mehraufwand an elastisch verformbarem Werkstoff und ohne eine Erhöhung der Herstellungskosten für die erfindungsgemässe Gelenkhülle erreicht werden, und weil darüber hinaus durch die wesentliche Verringerung des Volumens des zur Schmierung der Drehgelenkkupplung erforderlichen und relativ teuren Schmiermittels noch Preiseinsparungen erzielt werden. These This design according to the invention does not help only technical but also economic advantages, because the essential ones Extension of the service life in general and the substantial increase in stone chip safety in particular without an additional expenditure of elastically deformable material and without an increase in the manufacturing costs for the joint sleeve according to the invention is achieved be, and because, in addition, by the substantial reduction in volume the relatively expensive lubricant required to lubricate the swivel joint price savings can still be achieved.

Die wesentliche Verlängerung der Lebensdauer wird durch die besondere Gestaltung der Falten der Gelenkschutzhülle erreicht, durch die die heute bei den grossen beim Antrieb der Vorderräder eines Kraftfahrzeuges auftretenden Beugungswinkeln vorkommenden erbeanspruchungen des elastisch verformbaren Werkstoffes, die beim Ubergang von der Zone der auseinandergezogenen in die Zone der zusammengepressten Falten auftreten, vermieden werden. Zur Verlängerung der Lebensdauer leisten auch die Schutzringe einen wichtigen Beitrag, die aus den Flanken mit der grösseren Wanddicke herauswachsen, weil sie die Zwischenräume zwischen den Falten axial abdecken und vor einer Verschmutzung und deren Folgeschäden schützen.The essential extension of the service life is due to the special Design of the folds of the joint protective cover achieved through which the today at the large bending angles occurring when driving the front wheels of a motor vehicle occurring stresses on the elastically deformable material, which when Transition from the zone of the expanded to the zone of the compressed Wrinkles occur to be avoided. Also help to extend the service life the protective rings make an important contribution from the flanks with the greater wall thickness grow out because they axially cover the spaces between the folds and protect against contamination and its consequential damage.

Die wesentliche Erhöhung der Steinschlagsicherheit wird durch die grosse Wanddicke der Flanken mit dem kleineren Kegelwinkel erreicht. Diese grosse Wanddicke verursacht aber keinen Mehraufwand an Werkstoff, weil die Wanddicke der Flanken mit dem grossen Kegelwinkel infolge ihrer besonderen und vor mechanischen Beschädigungen sicheren Lage sehr dünn gehalten werden kann.The substantial increase in stone chip safety is achieved by the large wall thickness of the flanks achieved with the smaller cone angle. This size However, the wall thickness does not cause any additional expenditure on material, because the wall thickness of the Flanks with the large taper angle due to their special and mechanical Damage secure location can be kept very thin.

Die grosse Wanddicke der Flanken mit dem kleineren Kegelwinkel ist auch ein wirkungsvoller Schutz gegen Beschädigungen, die in manchen Gegenden noch öfter vorkommen als Steinschlagschäden und die von Nagetieren stammen, die eine Vorliebe für warme und nach Fett oder Oel riechende Gummiteile von abgestellten Kraftfahrzeugen haben. Über diese erst in neuerer Zeit erkannten und häufig zum totalen Ausfall eines Kraftfahrzeuges fUhrendenBeschädigungen schädigungen wird in einem am 15. August 1979 in der tSTUTT-GARTER ZEITUNG" erschienenen Artikel ausführlich berichtet.The large wall thickness of the flanks with the smaller cone angle is also an effective protection against damage, which in some areas is still occur more often than rockfall damage and that come from rodents, the one Preference for warm rubber parts that smell of grease or oil when they are parked Have motor vehicles. About this only recently recognized and often used to total failure of a motor vehicle leading to damage damage is in an article published on August 15, 1979 in the tSTUTT-GARTER ZEITUNG " reported in detail.

Die wesentliche Einsparung an dem hochwertigen und relativ teuren Schmiermittel zur Schmierung der Drehgelenkkupplung wird durch die besondere Gestaltung der Falten der Gelenkschutzhülle erreicht, durch die ein besonders kleiner Schmiermittel-Totraum zustandekommt. Dieser kleine Schmiermittel- Totraum ergibt zusammen mit der grossen Wanddicke der Flanken mit dem kleineren Kegelwinkel auch den Vorteil einer bis jetzt nicht erreichten Sicherheit gegen das Aufblähen der Gelenkschutzhülle bei hohen Drehzahlen und hohen Temperaturen.The main saving on the high quality and relatively expensive Lubricant for the lubrication of the swivel coupling is due to the special design of the folds of the protective joint cover, through which a particularly small lubricant dead space is achieved comes about. This small lubricant dead space results together with the large one Wall thickness of the flanks with the smaller cone angle also has the advantage of up to now not achieved security against inflation of the protective joint cover at high Speeds and high temperatures.

In der Zeichnung ist eine mögliche Ausführungsform des Gegenstandes der Erfindung am Beispiel einer als Festgelenk ausgebildeten Drehgelenkkupplung zum Antrieb der Vorderräder eines Kraftfahrzeuges dargestellt, weil bei dieser Anwendungsart mit ihren grossen Beugungswinkeln bis zu 450 die technischen und wirtschaftlichen Vorteile einer erfindungsgemässen Gestaltung der Gelenkschutzhülle besonders gross sind. Gelenkschutzhüllen gemäss der Erfindung können natürlich auch für Drehgelenkkupplungen verwendet werden, die als Verschiebegelenke ausgebildet sind.In the drawing is a possible embodiment of the object of the invention using the example of a swivel coupling designed as a fixed joint shown for driving the front wheels of a motor vehicle because in this type of application with their large diffraction angles of up to 450 the technical and economic Advantages of a design of the protective joint cover according to the invention are particularly great are. Joint protection sleeves according to the invention can of course also be used for swivel joint couplings are used, which are designed as sliding joints.

Die Gelenkschutzhülle 2, die aus einem elastisch verformbaren Werkstoff, beispielsweise Gummi, gefertigt ist, ist mit ihrem äusseren Ende mit dem äusseren Kupplungsteil 1 und mit ihrem inneren Ende mit der Welle 11 der Drehgelenkkupplung über die Spannbänder 3 und 10 luft- und flüssigkeitsdicht verbunden. Sie ist als Faltenbalg mit vier radial umlaufenden Falten ausgebildet, deren Flanken 4, 5 bzw. 6, 7 Kegelmäntel 12, 13 bilden, die sich mit verschieden grossen Kegelwinkeln 19, 20 zur umhüllten Drehgelenkkupplung hin verjüngen. Die Wanddicke 18 der Flanken 4, 6 mit dem kleineren Kegelwinkel 19 ist grösser als die Wanddicke 17 der Flanken mit dem grösseren Kegelwinkel 20. Aus den Flanken mit der grösseren Wanddicke 18 wachsen Schutzringe 8 heraus, welche welche die Zwischenräume 15 zwischen den Falten axial abdecken und vor einer Verschmutzung und deren Folgeschäden schützen. 14 ist der Schwenkpunkt der als Festgelenk ausgebildeten Drehgelenkkupplung mit dem grossen Beugungswinkel 9, der 450 beträgt.The joint protection sleeve 2, which is made of an elastically deformable material, for example rubber, is made with its outer end with the outer Coupling part 1 and with its inner end to the shaft 11 of the swivel coupling Connected in airtight and liquid-tight manner via the tensioning straps 3 and 10. She is as Bellows formed with four radially circumferential folds, the flanks of which are 4, 5 or 6, 7 form cone shells 12, 13, which are formed with differently sized cone angles 19, 20 taper towards the wrapped swivel joint. The wall thickness 18 of the flanks 4, 6 with the smaller cone angle 19 is greater than the wall thickness 17 of the flanks with the larger cone angle 20. From the flanks with the larger wall thickness 18 protective rings 8 grow out, which which the spaces 15 Cover axially between the folds and protect against contamination and its consequential damage protection. 14 is the pivot point of the swivel joint, which is designed as a fixed joint with the large diffraction angle 9, which is 450.

Patentansprüche: LeerseitePatent claims: Blank page

Claims (2)

Gelenkschutzhülle aus einem elastisch verformbaren Werkstoff Patentansprüche: C Gelenkschutzhülle aus einem elastisch verformbaren Werkstoff, insbesondere für Drehgelenkkupplungen zum Antrieb der Räder eines Kraftfahrzeuges, welche als Faltenbalg mit radial umlaufenden Falten ausgebildet ist, d a -d u r c h g e k e n n z e i c h n e t , dass die Flanken (4, 5 bzw. 6, 7) der radial umlaufenden Falten des Faltenbalges Kegelmäntel (12, 13) bilden, die sich mit verschieden grossen Kegelwinkeln (19, 20) zur umhüllten Drehgelenkkupplung hin verjüngen, und dass die Wanddicke (18) der Flanken (4, 6) mit dem kleineren Kegelwinkel (19) grösser ist als die Wanddicke (17) der Flanken (5, 7) mit dem grösseren Kegelwinkel (20). Joint protection cover made of an elastically deformable material Patent claims: C Joint protection sleeve made of an elastically deformable material, especially for Swivel couplings for driving the wheels of a motor vehicle, which act as bellows is formed with radially circumferential folds, d u r c h g e k e n n z e i c h n e t that the flanks (4, 5 or 6, 7) of the radially circumferential folds of the Bellows form cone shells (12, 13) which have cone angles of different sizes (19, 20) taper towards the wrapped swivel joint, and that the wall thickness (18) of the flanks (4, 6) with the smaller cone angle (19) is greater than the wall thickness (17) of the flanks (5, 7) with the larger cone angle (20). 2. Gelenkschutzhülle nach Anspruch 1, d a d u r c h g e -k e n n z e i c h n e t , dass aus den Flanken (6) mit der grösseren Wanddicke (18) Schutzringe (8) herauswachsen, welche die Zwischenräume (15) zwischen den Falten axial (Pfeil 16) abdecken.2. Joint protection sleeve according to claim 1, d a d u r c h g e -k e n n z e i c h e t that from the flanks (6) with the greater wall thickness (18) protective rings (8) grow out, which axially define the spaces (15) between the folds (arrow 16) cover.
DE19792945234 1979-11-09 1979-11-09 Universal joint protective elastic sleeve - has bellows flanks at different cone angles and with different wall thicknesses Withdrawn DE2945234A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792945234 DE2945234A1 (en) 1979-11-09 1979-11-09 Universal joint protective elastic sleeve - has bellows flanks at different cone angles and with different wall thicknesses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792945234 DE2945234A1 (en) 1979-11-09 1979-11-09 Universal joint protective elastic sleeve - has bellows flanks at different cone angles and with different wall thicknesses

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DE2945234A1 true DE2945234A1 (en) 1981-05-14

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554533A1 (en) * 1983-11-08 1985-05-10 Glaenzer Spicer Sa ELASTIC BELLOWS FOR PROTECTING A HOMOCINETIC TRANSMISSION JOINT
EP0241741A2 (en) * 1986-04-17 1987-10-21 TRW Ehrenreich GmbH & Co. KG Sealing bellow for ball-joints
US4702483A (en) * 1985-04-13 1987-10-27 Toyoda Gosei Co., Ltd. Mechanical shaft joint boot
US4875692A (en) * 1987-10-20 1989-10-24 The Boeing Company Conically-shaped corrugated seal
US4957469A (en) * 1989-12-07 1990-09-18 General Motors Corporation Convoluted boot seal with anti-abrasion side wall ribs
US5098344A (en) * 1989-12-07 1992-03-24 General Motors Corporation Convoluted boot seal with low friction and high wall strength
DE4142194A1 (en) * 1991-12-20 1993-07-01 Daimler Benz Ag Expansion bellows with fold enclosing angle - has folds, each with at least one stepped side with saw tooth profile
EP0565344A2 (en) * 1992-04-06 1993-10-13 The Gates Rubber Company Flexible boot for universal joint
DE19857389A1 (en) * 1998-12-12 2000-03-30 Daimler Chrysler Ag Automotive steering wheel column rubber bellows ring has strengthened section facilitating return to original shape after deformation
WO2001088399A1 (en) * 2000-05-15 2001-11-22 Gkn Automotive Gmbh Rolled bellows
WO2008022621A2 (en) * 2006-08-25 2008-02-28 Zf Friedrichshafen Ag Sealing or corrugated bellows
WO2009112716A2 (en) * 2008-02-22 2009-09-17 Societe Nationale Des Chemins De Fer Français Sncf Protective assembly comprising a protective bellows
FR3050249A1 (en) * 2016-04-13 2017-10-20 Renault Sas FLEXIBLE PROTECTIVE BELL SIZE AGAINST EXTERNAL PROJECTIONS

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554533A1 (en) * 1983-11-08 1985-05-10 Glaenzer Spicer Sa ELASTIC BELLOWS FOR PROTECTING A HOMOCINETIC TRANSMISSION JOINT
US4597745A (en) * 1983-11-08 1986-07-01 Glaenzer Spicer Elastic protective bellows for a homokinetic transmission joint
US4702483A (en) * 1985-04-13 1987-10-27 Toyoda Gosei Co., Ltd. Mechanical shaft joint boot
EP0241741A2 (en) * 1986-04-17 1987-10-21 TRW Ehrenreich GmbH & Co. KG Sealing bellow for ball-joints
EP0241741A3 (en) * 1986-04-17 1988-03-30 Trw Ehrenreich Gmbh & Co. Kg Sealing bellow for ball-joints
US4755078A (en) * 1986-04-17 1988-07-05 Trw Ehrenreich Gmbh & Co Kg Sealing bellows for ball joints
US4875692A (en) * 1987-10-20 1989-10-24 The Boeing Company Conically-shaped corrugated seal
US4957469A (en) * 1989-12-07 1990-09-18 General Motors Corporation Convoluted boot seal with anti-abrasion side wall ribs
US5098344A (en) * 1989-12-07 1992-03-24 General Motors Corporation Convoluted boot seal with low friction and high wall strength
DE4142194A1 (en) * 1991-12-20 1993-07-01 Daimler Benz Ag Expansion bellows with fold enclosing angle - has folds, each with at least one stepped side with saw tooth profile
EP0565344A2 (en) * 1992-04-06 1993-10-13 The Gates Rubber Company Flexible boot for universal joint
EP0565344A3 (en) * 1992-04-06 1994-04-06 Gates Rubber Co
DE19857389A1 (en) * 1998-12-12 2000-03-30 Daimler Chrysler Ag Automotive steering wheel column rubber bellows ring has strengthened section facilitating return to original shape after deformation
WO2001088399A1 (en) * 2000-05-15 2001-11-22 Gkn Automotive Gmbh Rolled bellows
WO2008022621A2 (en) * 2006-08-25 2008-02-28 Zf Friedrichshafen Ag Sealing or corrugated bellows
WO2008022621A3 (en) * 2006-08-25 2009-05-07 Zahnradfabrik Friedrichshafen Sealing or corrugated bellows
JP2010501791A (en) * 2006-08-25 2010-01-21 ツェットエフ フリードリヒスハーフェン アクチエンゲゼルシャフト Sealing bellows or flanged bellows
WO2009112716A2 (en) * 2008-02-22 2009-09-17 Societe Nationale Des Chemins De Fer Français Sncf Protective assembly comprising a protective bellows
WO2009112716A3 (en) * 2008-02-22 2009-11-05 Societe Nationale Des Chemins De Fer Français Sncf Protective assembly comprising a protective bellows
FR3050249A1 (en) * 2016-04-13 2017-10-20 Renault Sas FLEXIBLE PROTECTIVE BELL SIZE AGAINST EXTERNAL PROJECTIONS

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