WO1991000814A1 - Dispositif d'essuie-glace pour vehicule automobile - Google Patents

Dispositif d'essuie-glace pour vehicule automobile Download PDF

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Publication number
WO1991000814A1
WO1991000814A1 PCT/EP1990/001112 EP9001112W WO9100814A1 WO 1991000814 A1 WO1991000814 A1 WO 1991000814A1 EP 9001112 W EP9001112 W EP 9001112W WO 9100814 A1 WO9100814 A1 WO 9100814A1
Authority
WO
WIPO (PCT)
Prior art keywords
wiper
drive motor
movement transmission
windshield
contact pressure
Prior art date
Application number
PCT/EP1990/001112
Other languages
German (de)
English (en)
Inventor
Bruno Egner-Walter
Eckhardt Schmid
Original Assignee
Swf Auto-Electric 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 Swf Auto-Electric Gmbh filed Critical Swf Auto-Electric Gmbh
Publication of WO1991000814A1 publication Critical patent/WO1991000814A1/fr

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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
    • B60S1/3411—Wiper arms; Mountings therefor with means for varying wiper-blade pressure on windshield during operation

Definitions

  • the invention relates to a windshield wiper system for motor vehicles according to the features of the preamble of claim 1.
  • Windshield wipers can be changed, but only one drive motor, usually an electric motor, is used in the interest of an inexpensive design for both control devices on the driver-side and on the passenger-side windshield wipers.
  • the drive motor can form a structural unit with one windshield wiper, so that only an additional, preferably flexible, movement transmission means to the output element of the actuating device on the other windshield wiper is required.
  • Such a solution has the advantage that the conventional assembly on the driver's wiper can be essentially maintained if a connection point for the additional movement transmission means is provided.
  • Windscreen wiper bearing Solutions are then advantageous in which the drive motor for the two actuating devices for adjusting the contact pressure is a separate unit from the two windshield wipers.
  • this drive motor can, as it were, be arranged centrally in such a way that from it to both output elements on the
  • Windshield wiper is arranged and then the two adjusting devices for changing the contact pressure are connected directly to one another via a movement transmission element.
  • a movement transmission element There are usually considerable space problems in a motor vehicle in the area below the windshield, and it is therefore not easy to use dimensionally stable threaded rods as the movement transmission means.
  • flexible movement transmission means in the form of Bowden cables or
  • flexible shafts can usually be set up for a system that is easy to assemble.
  • Fig. 1 is a schematic diagram of a wiper system
  • FIG. 2-4 schematic representations with differently arranged
  • a windshield wiper system includes a first windshield wiper 1 with a wiper arm 10 with a wiper rod 11 which is pivotable on one
  • Fastening part 12 is articulated, which is fixed in rotation on a wiper shaft 13.
  • a two-armed lever 14 is pivotally mounted, at one end of which a C-bracket 15 is suspended, on which a contact pressure spring 16 is supported.
  • On the other end of the lever 14 acts an actuating rod 21 which is guided in the wiper shaft 13 through which it can move. If this adjusting rod 21 is adjusted in the direction of arrow P, the position of the lever 14 also changes.
  • 1 includes a second windshield wiper 2, which is basically constructed in the same way. Again, a two-armed lever 14 'can be pivoted via an adjusting rod 21' and thus the direction of action of the
  • Contact pressure spring 16 ' can be changed so that the contact pressure is varied.
  • Fig. 1 denotes an electric drive motor, which has on both sides on its armature shaft connection means for two in the form of a flexible shaft 31, 31 'movement transmission means.
  • the flexible shaft 31 leads to the wiper 1 and is in
  • the contact pressure of the first windshield wiper can be changed via an actuator 20, to which the drive motor 30 uses the flexible shaft 31 as a movement transmission means and an output element influencing the contact pressure, to which the pinion 23, the toothed rack 24 and the actuating rod 21 is expected to belong.
  • the contact pressure of the second windshield wiper 2 can also be changed via an actuator 20 ', which likewise includes a flexible shaft 31' and the elements 23 ', 24' and 21 '. It is important for the present invention that this second actuator 20 'is also controlled by the drive motor 30, which influences the contact pressure of the first wiper 1. It is therefore an electric motor for a wiper system according to the present invention a control of two actuators used to change the contact pressure of two wipers, whereby the manufacturing costs of such a system can be kept low.
  • Switching stage 35 can be controlled, the certain input signals,
  • a switching signal from a switch 36 are supplied.
  • this switch 36 can be coupled to the operating switch of the actual wiper motor, not shown in the drawing, in such a way that the contact pressure is set to a low level by rotating the motor 30 in one direction when the wiper system is switched off, but by Rotation of the electric motor in the other direction is switched to a higher level as soon as the wiper system is started.
  • this simplest version only the contact pressure should be reduced when the disks are at rest. at
  • the drive motor 30 is a separate unit from the two windshield wipers 1, 2, with flexible drive transmission means 31, 31 'leading from this drive motor 30 to both windshield wipers 1, 2.
  • the electric motor 30 will be made to arrange the electric motor 30 approximately symmetrically between the two wipers 1, 2 or at least the length of the
  • FIG. 2 a wiper system is shown again schematically, the after is built on this principle.
  • 3 shows a wiper system in which the drive motor 30 is a unit with the
  • Actuator 20 to form a wiper Consequently, one only needs an additional flexible motion transmission means 31 'to the actuator 20' of the other wiper, which can be designed as a flexible shaft or in other designs as a flexible perforated tape, Bowden cable or pearl rope.
  • This version has the advantage that as
  • Actuator 20 for a windshield wiper the previous series version is largely usable.
  • a disadvantage is that losses are to be expected because of the large length of the movement transmission means to the other windshield wiper, so that an exactly equal adjustment of the contact pressure on both wipers cannot be guaranteed with certainty.
  • FIG. 4 an embodiment is indicated in FIG. 4, in which the electric motor 30 is in turn mounted on the motor vehicle as an independent structural unit, a flexible shaft 31 leading from this electric drive motor 30 to the second windshield wiper.
  • a dimensionally stable toothed rack 85 couples the two pinions 23 'and 23 to one another, with FIG. 4 still now
  • the pinions 23 and 23 ' can be of different sizes and consequently a different change of the contact pressure on the two wisctiers is also possible.
  • Such a solution can be advantageous in some motor vehicles for reasons of space, and for the sake of completeness it is pointed out that an arrangement of the drive motor 30 can also make sense in wiper systems, regardless of the actuator of a windshield wiper, in which only the contact pressure of one windshield wiper is varied .
  • Windshield wiper system are created in which the contact pressure can be changed on both the driver's side and the passenger's wiper arm. Only one drive motor is used, and this means that the control effort is also comparatively low. You need namely if necessary, only one switching disc for switching off the motor in the different positions and, for example, a speed-dependent encoder and only one switching stage. When using a flexible shaft for the drive, hardly any assembly disadvantages are expected.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

Dispositif d'essuie-glace pour véhicule automobile, dans lequel aussi bien la pression d'application de l'essuie-glace sur le pare-brise côté conducteur (1), que la pression d'application sur le pare-brise côté passager (2) est variable, un seul moteur de commande (30) étant prévu pour assurer cette variation de pression.
PCT/EP1990/001112 1989-07-13 1990-07-09 Dispositif d'essuie-glace pour vehicule automobile WO1991000814A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3923141.0 1989-07-13
DE19893923141 DE3923141A1 (de) 1989-07-13 1989-07-13 Scheibenwischeranlage fuer kraftfahrzeuge

Publications (1)

Publication Number Publication Date
WO1991000814A1 true WO1991000814A1 (fr) 1991-01-24

Family

ID=6384933

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/001112 WO1991000814A1 (fr) 1989-07-13 1990-07-09 Dispositif d'essuie-glace pour vehicule automobile

Country Status (2)

Country Link
DE (1) DE3923141A1 (fr)
WO (1) WO1991000814A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5795234A (en) * 1980-12-03 1982-06-14 Takashi Sato Protector for wiper
WO1985003044A1 (fr) * 1983-12-30 1985-07-18 Robert Bosch Gmbh Dispositif d'essuie-glace pour vehicules a moteur
DE3444927A1 (de) * 1984-12-08 1986-07-10 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Scheibenwischeranlage, insbesondere fuer kraftfahrzeuge
EP0207404A2 (fr) * 1985-07-02 1987-01-07 SWF Auto-Electric GmbH Dispositif d'essuie-glace
EP0263007A1 (fr) * 1986-09-29 1988-04-06 René Delluc Dispositif de lavage et de dégivrage des pare-brise de véhicules automobiles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8708386U1 (de) * 1987-06-13 1988-10-06 Robert Bosch Gmbh, 70469 Stuttgart Wischvorrichtung für Scheiben von Kraftfahrzeugen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5795234A (en) * 1980-12-03 1982-06-14 Takashi Sato Protector for wiper
WO1985003044A1 (fr) * 1983-12-30 1985-07-18 Robert Bosch Gmbh Dispositif d'essuie-glace pour vehicules a moteur
DE3444927A1 (de) * 1984-12-08 1986-07-10 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Scheibenwischeranlage, insbesondere fuer kraftfahrzeuge
EP0207404A2 (fr) * 1985-07-02 1987-01-07 SWF Auto-Electric GmbH Dispositif d'essuie-glace
EP0263007A1 (fr) * 1986-09-29 1988-04-06 René Delluc Dispositif de lavage et de dégivrage des pare-brise de véhicules automobiles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 187 (M-158)(1065) 25 September 82, & JP-A-57 95234 (TAKASHI SATOU) 14 Juni 82, siehe das ganze Dokument *

Also Published As

Publication number Publication date
DE3923141A1 (de) 1991-01-17

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