WO2007137891A1 - Balai d'essuie-glace comprenant au moins un élément support et un déflecteur - Google Patents

Balai d'essuie-glace comprenant au moins un élément support et un déflecteur Download PDF

Info

Publication number
WO2007137891A1
WO2007137891A1 PCT/EP2007/052963 EP2007052963W WO2007137891A1 WO 2007137891 A1 WO2007137891 A1 WO 2007137891A1 EP 2007052963 W EP2007052963 W EP 2007052963W WO 2007137891 A1 WO2007137891 A1 WO 2007137891A1
Authority
WO
WIPO (PCT)
Prior art keywords
edge
spoiler
wiper blade
tear
vehicle window
Prior art date
Application number
PCT/EP2007/052963
Other languages
German (de)
English (en)
Inventor
Marco Zucchini
Martin Fischer
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2007137891A1 publication Critical patent/WO2007137891A1/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
    • B60S1/38—Wiper blades
    • B60S1/3848—Flat-type wiper blade, i.e. without harness
    • B60S1/3874—Flat-type wiper blade, i.e. without harness with a reinforcing vertebra
    • B60S1/3875—Flat-type wiper blade, i.e. without harness with a reinforcing vertebra rectangular section
    • B60S1/3879—Flat-type wiper blade, i.e. without harness with a reinforcing vertebra rectangular section placed in side grooves in the squeegee
    • 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
    • B60S1/38—Wiper blades
    • B60S1/3806—Means, or measures taken, for influencing the aerodynamic quality of the wiper blades
    • B60S1/381—Spoilers mounted on the squeegee or on the vertebra

Definitions

  • the invention is based on a wiper blade with at least one support element and a spoiler according to the preamble of claim 1.
  • the wiper blade When a wiper blade of a windshield wiper flows around, aerodynamic noises are produced, which can be distracting in the interior of the vehicle.
  • the wiper blade is an elongated body, which generally has a nearly constant profile along its span. As the wiper blade profile flows around, vortices detach during the transition from the overpressure side to the low pressure side, which are correlated along the spanwise direction over typically a few body heights. The resulting vortex rolls hit after some distance from the wiper blade on the vehicle window, which leads to noises.
  • the particularly disturbing frequencies are typically between a few hundred and about five to ten kHz.
  • a wiper blade for cleaning windows of motor vehicles has a wiper strip with a head strip, with a tilting bridge over a Wischlippe is connected.
  • band-shaped spring rails are embedded as support elements that protrude laterally a little way from the longitudinal grooves.
  • a jacket covers the head strip and the spring rails, wherein the sheath is held on the protruding parts of the spring rails by means of claws.
  • the casing has a flat, convexly curved part, which extends transversely across the spring rails, and adjoins, on the inflow side, a spoiler surface pulled down in the direction of the wiper lip toward the vehicle window.
  • the shroud has a conventional spoiler profile, in which a concave spoiler surface extends from a front edge to a rear leg which extends substantially perpendicular to the vehicle window and forms a tear-off edge for the air flow at its outer edge.
  • the spoiler can be combined with a spoiler surface pulled down to the wiper lip.
  • the casing has a surface structuring at least in sections. This can consist of spherical-segment-shaped recesses which lead to a favorable turbulent boundary layer on the surface of the casing and additionally reduce the air resistance of the wiper blade streamed by the airstream.
  • a surface structuring at least in sections. This can consist of spherical-segment-shaped recesses which lead to a favorable turbulent boundary layer on the surface of the casing and additionally reduce the air resistance of the wiper blade streamed by the airstream.
  • lower flow forces act on the wiper blade, especially at higher vehicle speeds, as a result of which lifting of the wiper blade from the vehicle window is largely ruled out.
  • the flow around the surface with small additional surveys, for example in the order of 0.1 to 2 millimeters, be provided.
  • the casing on the upstream side has a turbulator, which likewise generates a turbulent boundary layer, which has positive effects on the wiping behavior of the wiper blade.
  • the tear-off edge at which the air flow when flowing around the wiper blade profile of this lost, longitudinally designed so that the distance of the impact varies from the rear edge of the spoiler over the length of the spoiler.
  • the changes in the tear-off edge take place longitudinally within some of the wiper blade body, ie within typically 5 to 10 cm. Sound sources within such a range are compact in terms of frequencies below about 4 to 8 kHz, and they can mutually compensate each other in their effect, whereby the resulting sound power is reduced.
  • the spoiler has a leg facing away from the vehicle window, which adjoins a concave guide surface and whose outwardly facing edge forms the tear-off edge whose height varies over the length by a height difference.
  • the height difference preferably varies in the specified long ranges, wherein the tear-off edge in the height and / or in a plane is approximately pa- Rallel to the vehicle window may be wavy and / or jagged.
  • the spoiler with a substantially convexly curved guide surface covers the upper part of the wiper blade, the guide surface covering the wiper blade of the wiper blade to the front edge of the spoiler and having at least one recess to the rear edge, whose edge facing the front edge forms the tear-off edge.
  • the tear-off edge can be wave-shaped and / or serrated, likewise the depth of the depressions can be varied in sections.
  • FIG. 1 is a side view of a wiper blade according to the invention
  • Fig. 2 is a section along the line II-II in Fig. 1
  • Fig. 3 shows a variant of Fig. 2
  • Fig. 4 is a partial view of a spoiler of FIG. 3 from above and
  • FIG. 5 shows a variant of FIG. 4.
  • a wiper blade 10 shown in Fig. 1 is a so-called flat bar wiper blade. It has a wiper strip 14, the wiper lip 16 slides in wiping operation on a vehicle window 12 and cleans them.
  • the wiper lip 16 is connected via a tilting ridge with a header 18. This has lateral longitudinal grooves, are used in the spring rails 20 as support elements.
  • a spoiler 22 is held by means of claws 24.
  • the claws 24 may be continuous on each longitudinal side of the spring rail 20, provided that they have a necessary for the curvature of the spring rails 20 game.
  • a connecting element 62 is further provided for articulated connection with a wiper arm, not shown.
  • the spoiler 22 On the connecting element 62 close to both sides in the longitudinal direction 34, the parts of the spoiler 22, which are closed at their free ends by end caps 32.
  • the spoiler 22 starting from a front edge 46 in the flow direction 58, has a substantially concave guide surface 26, to which a limb 60 adjoins. This extends approximately perpendicular to the vehicle window 12, wherein its outwardly facing edge forms a tear-off edge 28.
  • the height of the tear-off edge 28 above the vehicle window 12 varies within a height difference 30, so that a vortex roll flowing over the edge of the leg 60 strikes the vehicle window 12 at different distances behind a rear edge 48 of the spoiler 22.
  • the tear-off edge 28 may have a wave-shaped and / or jagged course. It may also be formed transversely to the longitudinal direction 34 wave-shaped and / or jagged.
  • FIGS. 3 to 5 show a spoiler 36 or 52 with a flat cross-sectional profile which spans the wiper strip 14 and the spring rails 20 in a convex curvature.
  • the spoiler profile is extended and forms a guide surface 38, which covers a large part of the wiper strip 14 on the upstream side.
  • the edge facing the front edge 46 forms a tear-off edge 40 and 54, respectively.
  • a plurality of recesses 50 are provided, which are separated by spacers from each other, so that a serrated tear-off edge 40 is formed.
  • the width 45 of the recesses 50 and the distance 56 of the front edge 46 from the rear edge 48 of the spoiler 36 can be adapted to the requirements of the individual case. Further for example, the width 44 of the spacings of the depressions 50 can be varied from one another.
  • the tear-off edge 54 is wavy, the distance 56 from the rear edge 48 of the spoiler 52 in the longitudinal direction 34 varies continuously.
  • the height difference 42 of the depressions 50 may vary to the rest of the spoiler surface in the longitudinal direction 34 of the spoilers 36 and 52, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Quality & Reliability (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

L'invention concerne un balai d'essuie-glace (10) comprenant au moins un élément support (20) et un déflecteur (22, 36, 52) qui présente un bord de rupture (28, 40, 54) s'étendant longitudinalement entre un bord avant (46) et un bord arrière (48) dans le sens d'écoulement (58), ce bord de rupture (28, 40, 54) déterminant sensiblement la zone d'incidence de l'air contournant le déflecteur (22, 36, 52) sur une vitre (12) du véhicule. Selon l'invention, ledit bord de rupture (28, 40, 54) est conçu dans le sens longitudinal (34) de telle sorte que la distance entre la zone d'incidence et le bord arrière (48) du déflecteur (22, 36, 52) varie sur la longueur dudit déflecteur (22, 36, 52).
PCT/EP2007/052963 2006-05-26 2007-03-28 Balai d'essuie-glace comprenant au moins un élément support et un déflecteur WO2007137891A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006024664.0 2006-05-26
DE200610024664 DE102006024664A1 (de) 2006-05-26 2006-05-26 Wischblatt mit mindestens einem Tragelement und einem Spoiler

Publications (1)

Publication Number Publication Date
WO2007137891A1 true WO2007137891A1 (fr) 2007-12-06

Family

ID=38121278

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/052963 WO2007137891A1 (fr) 2006-05-26 2007-03-28 Balai d'essuie-glace comprenant au moins un élément support et un déflecteur

Country Status (2)

Country Link
DE (1) DE102006024664A1 (fr)
WO (1) WO2007137891A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008042280A1 (de) * 2008-08-07 2010-02-11 Robert Bosch Gmbh Wischblatt
DE102018125158A1 (de) 2018-10-11 2020-04-16 Bayerische Motoren Werke Aktiengesellschaft Kraftfahrzeug-Wischerblatt

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6108857A (en) * 1998-10-23 2000-08-29 Lee; Albert I. Winter windshield wiper for use in a motor vehicle
EP1257445A1 (fr) 2000-02-21 2002-11-20 Valeo Wischersysteme GmbH Balai d'essuie-glace pour nettoyer les vitres d'automobiles
DE102004012867A1 (de) * 2004-03-16 2005-10-06 Volkswagen Ag Scheibenwischer für die Scheibenwischeranlage an einem Fahrzeug
JP2005297941A (ja) * 2004-03-18 2005-10-27 Asmo Co Ltd ワイパブレード

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6108857A (en) * 1998-10-23 2000-08-29 Lee; Albert I. Winter windshield wiper for use in a motor vehicle
EP1257445A1 (fr) 2000-02-21 2002-11-20 Valeo Wischersysteme GmbH Balai d'essuie-glace pour nettoyer les vitres d'automobiles
EP1257445B1 (fr) * 2000-02-21 2005-04-13 Valeo Wischersysteme GmbH Balai d'essuie-glace pour nettoyer les vitres d'automobiles
DE102004012867A1 (de) * 2004-03-16 2005-10-06 Volkswagen Ag Scheibenwischer für die Scheibenwischeranlage an einem Fahrzeug
JP2005297941A (ja) * 2004-03-18 2005-10-27 Asmo Co Ltd ワイパブレード

Also Published As

Publication number Publication date
DE102006024664A1 (de) 2007-11-29

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