WO1994020338A1 - Essuie-glace pourvu d'un dispositif d'ecartement de l'essuie-glace du pare-brise - Google Patents

Essuie-glace pourvu d'un dispositif d'ecartement de l'essuie-glace du pare-brise Download PDF

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Publication number
WO1994020338A1
WO1994020338A1 PCT/EP1994/000736 EP9400736W WO9420338A1 WO 1994020338 A1 WO1994020338 A1 WO 1994020338A1 EP 9400736 W EP9400736 W EP 9400736W WO 9420338 A1 WO9420338 A1 WO 9420338A1
Authority
WO
WIPO (PCT)
Prior art keywords
wiper
connecting part
blade arm
auxiliary element
contact surfaces
Prior art date
Application number
PCT/EP1994/000736
Other languages
English (en)
Inventor
Carlo Gritella
Original Assignee
Cooper Industries, Inc.
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 Cooper Industries, Inc. filed Critical Cooper Industries, Inc.
Publication of WO1994020338A1 publication Critical patent/WO1994020338A1/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
    • B60S1/3413—Wiper arms; Mountings therefor with means for holding the arm off the glass in an intermediate position between the working position and the fully folded back position

Definitions

  • the present invention refers in general to windshield wiper devices for automotive vehicles and refers more particularly to a wiper unit of the type including a wiper- blade arm connected at one of its ends in an articulated joint to a connecting part equipped with means for its connection to a motorized shaft of a control device.
  • the wiper-blade arm and the connecting part are generally equipped with their respective contact surfaces and are connected together by resilient elements designed to keep the contact surfaces in contact with one another.
  • the connecting part generally presents a conical hole which is designed to receive the end of the motorized shaft of the control device of the windshield wiper.
  • the wiper-blade arm is arranged at a certain inclination with regard to the connecting part, or more precisely, with regard to a plane at a right angle to the axis of the conical hole for fastening the connecting part.
  • the relative inclination between the wiper-blade arm and the connective part is necessary to generate the force which, in the configuration in which the wiper unit is fitted onto an automotive vehicle, keeps the wiper blade pressed against the vehicle window.
  • the relative inclination between the arm and the connecting part is reduced by the effect of the reaction of the blade against the window.
  • the reduction of this relative inclination applies to the resilient elements inserted between the wiper-blade arm and the connecting part, a preloading of which corresponds to the desired contact pressure between the blade and the window.
  • the relative inclination between the connecting part and the wiper-blade arm creates, however, problems during the fitting of the wiper unit onto an automotive vehicle.
  • the connecting part is tightened on the control shaft while the axis of the conical hole of the connecting part is not exactly lined up with the axis of the control shaft, because of the resilient force that tends to maintain the connecting part in an inclined position with regard to the wiper-blade arm.
  • the nut that fastens the connecting part to the control shaft is tighte ⁇ ned with the conical hole of the connecting part arranged in a wrong position, the connection of the wiping unit is uncertain and tends to lose efficacy after the windshield wiper has been operating for a certain amount of time, especially under high-speed operating conditions.
  • the hole of the connecting part is distor ⁇ ted with regard to the shaft, sticking and breaking of the connecting part will occur at its hole during the tightening of the connection nut.
  • the object of the present invention is a wiper unit characterized in that it includes an auxiliary element having a wedge portion which is designed to be inserted between the contact surfaces of the arm and the connecting part.
  • the wiper-blade arm and the connecting part are substantially lined up with each other and, therefore, with the wiper-blade part resting against the vehicle's glass, and the hole of the connecting part naturally locates itself in the correct fitting position.
  • the fact that the wiper-blade arm is substantially lined up with the connecting part reduces the contact pressure between the wiper blade and the glass with a resulting reduction in the risk of damaging the wiper lip during the period which transpires between the preparation of the vehicle and the delivery of the vehicle to the final purchaser.
  • the auxiliary element can be removed from the wiper unit or else it can be moved to an inoperative position before the vehicle is delivered to the final purchaser in order to restore the design value of the blade/glass contact pressure.
  • the auxiliary element can be equipped with the wiper unit, since it does not damage the aesthetic appearan ⁇ ce of the wiper-blade arm inasmuch as it is arranged in a nonvisible area with the windshield wiper fitted. The purchaser of the vehicle can, therefore, place the auxiliary element in the operating position, if the vehicle is to remain closed for long periods of time to avoid unnecessary stresses on the blade with the normal operating pressure.
  • Figure 1 is a partial schematic perspective view of a wiper unit according to the present invention
  • FIG. 1 is an exploded and partial perspective view of the wiper unit of Figure 1
  • Figure 3 is a section according to the line III-III of Figure 1, and
  • Figs. 4, 5 and 6 are axial sections corresponding to Figure 3 illustrating the fitting sequence of an auxiliary element according to the present invention.
  • the wiper unit 1 includes a wiper-blade arm 2 having one of its ends connected to a pin 4 in an articulated joint at a right angle to the longitudinal axis of the arm 2.
  • the joint pin 4 is borne by the head 6 of a connecting part 8 equipped with a hole 10 for fastening the wiper unit 1 to the end 12 of the shaft of a control device of the windshield wiper.
  • the hole 10 is conical and is coupled, in a self-evident way, to a conical surface 14 provided for in the end 12 of the motorised shaft.
  • the fastening of the connecting part 10 to the end 12 of the shaft is performed by means of a nut (not shown) which binds the threaded part of the end 12.
  • the resilient elements consist of a helicoidal spring 14 placed under tensile stress, with one of its ends anchored to a pin 18 borne by the connecting part 8 and a second end connected in an articulated joint to a pin 19 borne on the wiper-blade arm 2.
  • the use of helicoidal springs arranged under compression is quite widespread and everything descri ⁇ bed below is likewise applied in the case in which the resilient elements consist of one or more springs under compression.
  • the wiper unit 1 includes an auxiliary element 28, the function of which is to maintain in a substantially aligned configuration between them the wiper-blade arm 2 and the connecting part 8.
  • the connecting part 8 can assume configurations in which it is difficult to identify a type of parallelism between the connecting part 8 and the wiper-blade arm 2, it is more accurate to state that the purpose of the auxiliary element 28 is that of maintaining the wiper-blade arm 2 substan ⁇ tially parallel to a plane at a right angle to the axis 24 of the fastening hole 10.
  • the auxiliary element 28 consists of a single piece of stamped plastic material in which is clearly seen a substan ⁇ tially flat base 30, equipped with three anchoring potions 32 capable of engaging the helicoidal spring 14 with a tippling mechanism in an embracing relationship (see particularly Figures 5 and 6).
  • the anchoring parts 32 link the auxiliary element 28 to the spring 14, allowing, however, the element 28 to move axially with regard to the spring.
  • the back surface 34 of the base 30 is scored.
  • the auxiliary element 28 presents a resilient portion 36 with a substantially J-shaped profile having one thickened and 38 constituting a wedge portion which is designed to be inserted between the contact surfaces 20 and 22 of the connecting part 8 and the wiper-blade arm 2.
  • the thickness of the wedge portion is determined on the basis of the specific application conditions.
  • the fitting of the auxiliary element 28 is performed as follows .
  • a relative rotation is caused between the wiper-blade arm 2 and the connecting part 8 until a stable position of equilibrium is reached allowing the neutral point of the toggle system constituted by the spring 14 in combination with wiper-blade arm 2 and the connecting part 8 to be overcome.
  • the auxiliary element 28 is therefore inserted in the direction indicated by the arrow 40 in Figure 4, inducing the trigger coupling of the anchor portions 32 with the body of the spring 14.
  • the auxiliary element 28 is therefore made to run along the axis of the spring 14 in the direction indicated by the arrow 42 in Figure 5 until the wedge portion 38 enters into contact with the head 6 of the connecting part 8 (see Figure 5).
  • the wiper-blade arm 2 and the connecting part 8 are again turned, taking them into the configuration of Figure 6.
  • the wedge portion 38 naturally arranges itself between the surface 22 of the arm 2 and a hollow 44 made on the surface 20 of the hade 6.
  • the thickness of the wedge portion 38 causes the longitudinal axis of the arm 2 to be substantially at a right angle to the axis 24 of the fastening hole 10.
  • auxiliary element 28 After the fitting of the wiper unit onto an automotive vehicle, it is possible to remove the auxiliary element 28 after having raised the wiper-blade arm 2 from the vehicle glass. It is also possible to arrange the auxiliary element 28 along the axis of the spring 14 toward an inoperative position in which the wedge portion 38 is not inserted between the contact surfaces 20 and 22. To reduce the contact pressure between the blade and the glass during long periods of inactivity of the vehicle, it is possible to restore the auxiliary element 28 to the operating position shown in Figure 6, raising the wiper-blade arm 2 and causing an axial movement of the element 28 as described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

Essuie-glace pour véhicule automobile comprenant un balai (2) dont l'une des extrémités est reliée dans une articulation à une pièce de raccordement (8). Le balai (2) et la pièce de raccordement (8) sont équipés de faces de contact respectives destinées à coopérer l'une avec l'autre, et reliés entre eux par des éléments élastiques adaptés pour maintenir le contact entre ces faces de contact. Par ailleurs, l'essuie-glace renferne un élément auxiliaire (28) possédant une partie servant de coin (38) adaptée pour s'intercaler entre les faces de contact du balai (2) et de la pièce de raccordement (8).
PCT/EP1994/000736 1993-03-10 1994-03-09 Essuie-glace pourvu d'un dispositif d'ecartement de l'essuie-glace du pare-brise WO1994020338A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO930165A IT1260909B (it) 1993-03-10 1993-03-10 Gruppo tergitore per dispositivi tergicristallo di autoveicoli, con organo ausiliario avente funzione di zeppa.
ITTO93A000165 1993-03-10

Publications (1)

Publication Number Publication Date
WO1994020338A1 true WO1994020338A1 (fr) 1994-09-15

Family

ID=11411245

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/000736 WO1994020338A1 (fr) 1993-03-10 1994-03-09 Essuie-glace pourvu d'un dispositif d'ecartement de l'essuie-glace du pare-brise

Country Status (2)

Country Link
IT (1) IT1260909B (fr)
WO (1) WO1994020338A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2909345A1 (fr) * 2006-11-30 2008-06-06 Valeo Systemes Dessuyage Dispositif de butee pour bras porte-balai d'essuie-glace

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209276A2 (fr) * 1985-07-10 1987-01-21 Champion Spark Plug Europe S.A. Bras d'essuyage
FR2629030A1 (fr) * 1988-03-22 1989-09-29 Valeo Systemes Dessuyage Porte-balais d'essuie-glace comportant un verrou
FR2695609A1 (fr) * 1992-09-15 1994-03-18 Renault Dispositif de modification de l'effort d'appui exercé sur un porte-balai.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209276A2 (fr) * 1985-07-10 1987-01-21 Champion Spark Plug Europe S.A. Bras d'essuyage
FR2629030A1 (fr) * 1988-03-22 1989-09-29 Valeo Systemes Dessuyage Porte-balais d'essuie-glace comportant un verrou
FR2695609A1 (fr) * 1992-09-15 1994-03-18 Renault Dispositif de modification de l'effort d'appui exercé sur un porte-balai.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2909345A1 (fr) * 2006-11-30 2008-06-06 Valeo Systemes Dessuyage Dispositif de butee pour bras porte-balai d'essuie-glace

Also Published As

Publication number Publication date
ITTO930165A1 (it) 1994-09-10
ITTO930165A0 (it) 1993-03-10
IT1260909B (it) 1996-04-29

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