WO2020239224A1 - Bras d'essuie-glace - Google Patents

Bras d'essuie-glace Download PDF

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Publication number
WO2020239224A1
WO2020239224A1 PCT/EP2019/064079 EP2019064079W WO2020239224A1 WO 2020239224 A1 WO2020239224 A1 WO 2020239224A1 EP 2019064079 W EP2019064079 W EP 2019064079W WO 2020239224 A1 WO2020239224 A1 WO 2020239224A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm member
windscreen
wiped
pivot pin
arm
Prior art date
Application number
PCT/EP2019/064079
Other languages
English (en)
Inventor
Daniel BOUDJENAH
Original Assignee
Trico Belgium S.a.
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 Trico Belgium S.a. filed Critical Trico Belgium S.a.
Priority to PCT/EP2019/064079 priority Critical patent/WO2020239224A1/fr
Publication of WO2020239224A1 publication Critical patent/WO2020239224A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/3415—Wiper arms; Mountings therefor with means for supplying cleaning fluid to windscreen cleaners, e.g. washers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/3425—Constructional aspects of the arm
    • B60S1/3445—Joints between elements
    • B60S1/345—Joints between elements the elements being a link piece and a mounting head

Definitions

  • the present invention relates to a windscreen wiper arm, particularly for automobiles, comprising a mounting head mountable on a drive shaft for transferring a reciprocal movement to a wiper blade and an arm member pivotally connected to the mounting head by means of a pivot pin between a wiping position, wherein said arm member extends substantially parallel to a windscreen to be wiped, and an elevated position, wherein said arm member extends away from a windscreen to be wiped, wherein the arm member has a substantially U-shaped cross-section near said pivot pin comprising two side walls, wherein a part of the mounting head extends between the side walls and beyond said pivot pin, wherein said part is provided with opposite surfaces facing towards the side walls of the arm member.
  • Such a windscreen wiper arm is known from European patent publication no. 1 514 752 of the same Applicant.
  • said known windscreen wiper arm is connected to the mounting head mounted on the drive shaft, wherein said windscreen wiper arm at one end thereof is pivotally connected to the mounting head by means of the pivot pin and at another end thereof is connected to a connecting device fixed to said wiper blade placed in abutment with said windscreen to be wiped.
  • the shaft rotates alternately in a clockwise and in a counter-clockwise sense carrying the mounting head into rotation also, which in turn draws the windscreen wiper arm into rotation and by means of said connecting device moves the wiper blade.
  • Said oscillating arm can thus oscillate to-and-from between a first and second reversal positions.
  • the present invention particularly relates to a windscreen wiper arm arranged to be connected to a wiper blade of the flat blade type or "yokeless blade", wherein no use is made of several yokes pivotally connected to each other, but wherein the wiper blade is biased by a carrier element, as a result of which it exhibits a specific curvature.
  • Said wiper blade of the flat blade type particularly comprises an elastic, elongated carrier element, as well as an elongated wiper blade of a flexible material, which can be placed in abutment with a windscreen to be wiped, which wiper blade is connected to at least one longitudinal strip of the carrier element.
  • Said longitudinal strip is also called a“flexor”, while said connecting device is also indicated as a“connector”.
  • said wiper blade includes at least one longitudinal slit, in which slit said longitudinal strip is disposed.
  • said wiper blade and said longitudinal strip are glued together.
  • said wiper blade comprises a spoiler at a side thereof facing away from the windscreen to be wiped.
  • the spoiler is also called an "air deflector” and is preferably made in one piece with said wiper blade through extrusion.
  • Said longitudinal slit is preferably a central longitudinal slit accommodating said longitudinal strip.
  • Said connecting device is preferably fixedly connected to the longitudinal strip(s) particularly through a welding, brazing (“soldering”), gluing or clamping operation or with the help of a pin inserted through said connecting device and said longitudinal strip(s).
  • said connecting device is clamped onto the flexible material of the wiper blade, particularly in case the latter is equipped with a central longitudinal slit for the carrier element.
  • the present invention is not restricted to the use of only one longitudinal strip forming the elastic carrier element that is particularly located in a central longitudinal slit of the wiper blade.
  • said carrier element may also comprise two longitudinal strips, wherein said strips are disposed in opposite longitudinal slits of the wiper blade. Said slit(s) may be closed at one outer end.
  • said wiper blade and said longitudinal strip may be glued together.
  • present invention is not restricted to automobiles, but also refers to rail coaches and other (fast) vehicles.
  • a disadvantage of the known windscreen wiper arm is that it is often used in combination with a nozzle fixedly mounted on (or below) a bonnet of a car for spraying a washing liquid onto the car’s windscreen to be wiped.
  • the windscreen cannot effectively be cleaned by a combination of the windscreen wiper arm and the nozzle, as the nozzle emits the washing fluid thereon at a large distance relative to the windscreen, so that a relatively large amount of the washing fluid does not effectively reach a wiping pattern on the windscreen to be wiped.
  • a large amount of liquid is required in an attempt to clean the windscreen to be wiped.
  • washing fluid if it is spread onto the car’s body instead of onto the windscreen to be wiped, it may damage the car. Indeed, ethanol, methanol and other components of the washing fluid are believed to have a corrosive effect on paint, rubber, car wax and plastics, for example.
  • a simple windscreen wiper arm also called“oscillating arm”
  • a windscreen wiper arm of the type referred to in the introduction is characterized according to the invention in that said arm member comprises guiding means near said pivot pin arranged for guiding a flexible conduit from the outside inside said U- shaped cross-section of said arm member, said conduit being arranged for supplying washing liquid towards a windscreen to be wiped.
  • the flexible conduit is advantageously guided inside the mounting head along several loops, so that lower (traction or compression) forces are exerted on said conduit in the event that the arm member is moved from the wiping position, wherein said arm member extends substantially parallel to a windscreen to be wiped, and an elevated position, wherein said arm member extends away from a windscreen to be wiped in order to be replaced or repaired, and vice versa.
  • enough length of the conduit is created to lower said forces resulting in less wear, for example.
  • a standard (or universal) length of said conduit is, therefore, made possible, independent of the type of car.
  • the mounting head can remain the same for all types of car, i.e. the mounting head does not need any modification for guiding the conduit.
  • the nozzle By connecting the nozzle directly to the windscreen wiper arm, the nozzle is not only fixed to the rod-like extension in a reliable and controllable manner, although detachably in case of repair or replacement of the nozzle, but the nozzle is located at a very small distance relative to the windscreen to be wiped and is allowed to directly follow any oscillatory movement of the oscillating arm, so that the washing fluid exiting the nozzle can be effectively sprayed thereon, with all positive consequences involved as to effective cleaning of the windscreen to be wiped and safe visibility for a driver.
  • the nozzle may be used as a first nozzle in combination with a second nozzle located on the oscillating arm for spraying a washing liquid onto the windscreen to be wiped.
  • the washing liquid is sprayed from at least two locations (on the rod-like extension and on the oscillating arm) onto the windscreen to be wiped, namely washing liquid exiting from the first nozzle connected to the rod-like extension, as well as washing liquid exiting from the second nozzle connected to the oscillating arm.
  • the windscreen can be cleaned efficiently over a very large wiping area thereof, particularly at high speeds.
  • the first and second nozzles are preferably connected to only one inlet for the washing fluid, so that the first and second nozzles are in liquid contact with each other.
  • said guiding means comprises a hole inside one of said side walls.
  • said hole is made through a punching operation so that the shape of the hole is well controllable and reliable.
  • said hole is made inside one of said side walls in use facing towards a lower edge of a windscreen of the car (i.e. facing towards the bonnet of the car), so that the hole is invisible for a driver of the car.
  • said hole may be surrounded by a protective ring along its edge in order to protect paint of the arm member at the location of entrance of the flexible conduit therein. Simultaneously, the flexible conduit is protected against wear, for example, due to any (small) movement of the conduit inside the hole.
  • said hole has a closed circumference.
  • said hole has an oblong shape. This ensures a smooth curve in the flexible conduit when guiding the same inside the channel-like arm member, without damaging the conduit.
  • said hole has a width between 3 to 6 times the diameter of said conduit, as well as a height between 1 , 1 to 1 ,5 times the diameter of said conduit.
  • figures 1 , 2 and 3 show a mounting head and an arm member interconnected together according to a preferred variant of the invention, seen from below, from above and from a side, respectively; and figure 4 depicts the arm member of figures 1, 2 and 3, seen from a side..
  • a windscreen wiper arm 1 comprises a steel mounting head 2 fixed for rotation to a shaft 3 driven, via a mechanism not illustrated, by a small motor.
  • said windscreen wiper arm 1 further comprises a aluminium arm member 4 supported by the mounting head 2, wherein said arm member 4 in turn supports a wiper blade with the help of a connecting device (not shown).
  • the arm member 4 is pivotally connected to the mounting head 2 by means of a pivot pin 5.
  • the shaft 3 rotates alternately in a clockwise and in a counter-clockwise sense carrying the mounting head 2 into rotation also, which in turn draws the arm member 4 into rotation and by means of the connecting device moves the wiper blade.
  • the arm member 4 has a substantially U-shaped cross-section near said pivot pin 5 (inserted through co-axial openings thereof) comprising two side walls 6,7 and a base 8.
  • a part of the mounting head 2 extends between the side walls 6,7 of the arm member 4 and beyond said pivot pin 5. Said part is provided with opposite surfaces 9,10 facing towards the side walls 6,7. Each surface 9,10 of said part of said mounting head 2 is spaced apart from its corresponding side wall 6,7 of the arm member 4, so that there is a intermediate space 11 in between.
  • the arm member 4 comprises guiding means 12 close to said pivot pin 5 arranged for guiding a flexible conduit 13 from the outside inside said U-shaped cross-section of said arm member 4 , said conduit 13 being arranged for supplying washing liquid towards a windscreen to be wiped.
  • Said guiding means comprises a hole 12 having a closed circumference inside one of said side walls 6 of said arm member 4.
  • the flexible conduit 13 is advantageously guided inside the mounting head 2 along several loops 14, so that lower (traction or compression) forces are exerted on said conduit 13 in the event that the arm member 4 is moved from the wiping position, wherein said arm member 4 extends substantially parallel to a windscreen to be wiped, and an elevated position, wherein said arm member 4 extends away from a windscreen to be wiped in order to be replaced or repaired, and vice versa.
  • enough length of the conduit 13 is created to lower said forces resulting in less wear.

Abstract

L'invention concerne un bras d'essuie-glace (1), en particulier pour des automobiles, qui comprend une tête de montage (2) pouvant être montée sur un arbre d'entraînement pour transférer un mouvement de va-et-vient à un balai d'essuie-glace et un élément bras (4) relié de façon pivotante à la tête de montage au moyen d'une broche de pivot (5) entre une position d'essuyage dans laquelle ledit élément bras s'étend sensiblement parallèlement à un pare-brise à essuyer et une position élevée dans laquelle ledit élément bras s'étend à l'opposé d'un pare-brise à essuyer, l'élément bras ayant une section transversale sensiblement en forme de U à proximité de ladite broche de pivot comprenant deux parois latérales (6, 7), une partie de la tête de montage s'étendant entre les parois latérales et au-delà de ladite broche de pivot, ladite partie étant pourvue de surfaces opposées faisant face aux parois latérales de l'élément bras, avec la particularité que ledit élément bras comprend des moyens de guidage à proximité de ladite broche de pivot agencés pour guider un conduit flexible (13) depuis l'extérieur à l'intérieur de ladite section transversale en forme de U dudit élément bras, ledit conduit étant conçu pour fournir un liquide de lavage vers un pare-brise à essuyer.
PCT/EP2019/064079 2019-05-29 2019-05-29 Bras d'essuie-glace WO2020239224A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/064079 WO2020239224A1 (fr) 2019-05-29 2019-05-29 Bras d'essuie-glace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/064079 WO2020239224A1 (fr) 2019-05-29 2019-05-29 Bras d'essuie-glace

Publications (1)

Publication Number Publication Date
WO2020239224A1 true WO2020239224A1 (fr) 2020-12-03

Family

ID=66690371

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/064079 WO2020239224A1 (fr) 2019-05-29 2019-05-29 Bras d'essuie-glace

Country Status (1)

Country Link
WO (1) WO2020239224A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002067886A (ja) * 2000-08-30 2002-03-08 Asmo Co Ltd ウォッシャノズル付ワイパ
EP1514752A1 (fr) 2003-09-11 2005-03-16 Federal-Mogul S.A. Bras d'essuie-glace
US20140173846A1 (en) * 2012-12-10 2014-06-26 Valeo Systèmes d'Essuyage Drive member, device for holding a pipe, in particular for windscreen washer liquid, and corresponding wiper system
DE102014226741A1 (de) * 2014-12-22 2016-06-23 Robert Bosch Gmbh Wischarmvorrichtung
DE102017219908A1 (de) * 2017-11-09 2019-05-09 Robert Bosch Gmbh Wischarm

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002067886A (ja) * 2000-08-30 2002-03-08 Asmo Co Ltd ウォッシャノズル付ワイパ
EP1514752A1 (fr) 2003-09-11 2005-03-16 Federal-Mogul S.A. Bras d'essuie-glace
US20140173846A1 (en) * 2012-12-10 2014-06-26 Valeo Systèmes d'Essuyage Drive member, device for holding a pipe, in particular for windscreen washer liquid, and corresponding wiper system
DE102014226741A1 (de) * 2014-12-22 2016-06-23 Robert Bosch Gmbh Wischarmvorrichtung
DE102017219908A1 (de) * 2017-11-09 2019-05-09 Robert Bosch Gmbh Wischarm

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