DE1249108B - - Google Patents

Description

GERMAN WfWWt PATENT OFFICE

B08b; B60j; B60s
German class: 63 c - 82

EDITORIAL - ^

File number: S 8937711/63 c

1249108 Filing date: February 5, 1964

Opened on August 31, 1967

The invention relates to a windshield wiper, in particular for motor vehicles, with one on the Wiper drive shaft attached wiper arm head to which the wiper arm is articulated, and with a Tension spring that generates the force required to press the wiper blade against the windshield, the tension spring with its one end on the wiper arm and with its other end over a Intermediate member is connected to the wiper arm head so that the wiper arm with the wiper blade of the windshield can be folded away and remains in the folded-away position.

It is a windshield wiper known, the wiper arm with a wiper head on a Locating pin of the wiper shaft is arranged, is in connection. The wiper head is through a Leaf spring held on the locating bolt. A tension spring is connected to the via an intermediate link Wiper head in connection. The intermediate member is designed as a wire hook and on the one hand in an eyelet of the spring is hooked and on the other hand partially placed around an axis of the wiper head. This Wire hook is required to pull the wiper arm from the windshield over its Fold out the dead center position and be able to hold on to it in this position.

Such a simple design of the wire hook (two-point guide) is a movement this wire hook and the tension spring possible in the lateral direction. The mainspring comes with it the side walls of the U-shaped wiper arm holder in contact, so that during During the operation of the windshield wiper, annoying, scratching noises caused by the rubbing of the tension spring occur on the side walls.

It is the object of the invention to provide a windshield wiper which overcomes the shortcomings of the known Windshield wiper does not have, and in which a lateral deflection of the tension spring during operation of the windshield wiper is not possible.

The object is achieved in that the intermediate member is U-shaped and that both U-legs are pivotably mounted on an axis in the wiper arm head and are shaped such that the head of the known fastening screw for the wiper arm head in the working position of the The wiper is exposed on all sides, and that the web part of the U-shaped intermediate member is symmetrical Is bent in a V-shape so that the tension spring engages and is guided in the middle of the intermediate member.

Furthermore, the U-legs are approximately perpendicular to the windshield wiper, in particular for motor vehicles

Applicant:

SWF specialty factory for auto accessories
Gustav Rau G. mb H., Bietigheim (Württ)

Named as inventor:

Willy Bock, Bietigheim (Württ.);

Kurt Bauer, Kleiningersheim

The plane of the intermediate member is V-, U- or arc-shaped.

Another advantageous embodiment of the invention is that the fastening screw in When the windshield wiper is folded away, it is exposed on all sides.

The inventive design of the windshield wiper avoids being in the working position the head of the screw with which the wiper arm head is clamped onto the wiper shaft rubs against the thighs of the pontic.

Furthermore, it is achieved by the V-shaped buckling of the web of the intermediate link that the end the tension coil spring always in the plane of symmetry of the intermediate link and thus of the wiper arm attacks, and so with certainty a rubbing of the tension spring on a part of the wiper, and thus the occurrence of scratchy noises is avoided.

F i g. 1 shows a longitudinal section through a windshield wiper arm,

F i g. 2 shows the plan view of the windshield wiper according to FIGS. 1 and
F i g. 3 the U-shaped intermediate link in view.

The wiper arm shown consists essentially of a wiper arm head 1 to which a U-shaped bent sheet metal part 2 is articulated and a steel band 3 riveted to the sheet metal part, to the bent free end of which the wiper blade (not shown) is attached. The attachment of the Wischerarmkopfes 1 on the wiper drive shaft (not shown) by means of a fastening screw 4 and having a U-profile pressure piece 5. The required wiping pressure is generated by a tension spring 6, with their

709 639/334

Claims (3)

ί 249 one end is suspended in a bore 7 on the inner bent end of the steel strip 3 and at its other end in a U-bracket-shaped intermediate member 8, which is pivotably mounted with the two ends of its legs 8 'on the wiper arm head. The clear width of the two legs 8 'is always greater than the diameter of the head 4' of the fastening screw 4. However, in order to always avoid chafing of the head 4 'of the fastening screw 4 on the intermediate member 8 even with unfavorable manufacturing tolerances, the two legs 8' of the intermediate member are V-shaped so that when the wiper arm is in the working position, they always have the head 4 'of the fastening screw 4 release on all sides. Furthermore, the web part 8 ″ of the intermediate member is bent in its plane of symmetry and thus also V-shaped, so that the end of the tension spring always engages in the plane of symmetry of the intermediate member The U-bracket-shaped design of the intermediate member makes it possible to fold the wiper arm with the wiper blade from the windshield so far that it remains in the folded-down position until it is swiveled back to the windshield by hand Windshield wiper on the wiper drive shaft is already used in a number of windshield wipers because of the extremely simple attachment option. Instead of the stamped and bent sheet metal part shown, the U-bracket-shaped intermediate member can also be bent from wire. Which embodiment is preferable is shown in a preliminary calculation hen member made of wire, the wire eyelets with which it is pivotably attached to the wiper arm head via a pin, lying outside the leg axes, can be bent so that buckling of the bracket is unnecessary. The V-shaped or curved design of the legs may also be necessary in order to be able to tilt the wiper arm beyond the dead center position into a latched fold-down position. Patent claims: 1. Windshield wipers, especially for motor vehicles, with a wiper arm head attached to the wiper drive shaft, to which the wiper arm is hinged, and with a tension spring that generates the force required to press the wiper blade against the windscreen clip, the tension spring with one linden tree on the wiper arm and is connected to its other end via an intermediate member with the Wisclicrarmkopf so that the wiper arm with the wiper blade can be folded away from the windshield and remains in the folded-away position, characterized in that the intermediate member (8) is U-shaped, and that Both U-Schcnkcl (8 ') are pivotably mounted on an axis in the wiper arm head (1) and are shaped such that the head (4') of the known fastening screw (4) for the wiper arm head (1) is free on all sides in the working position of the wiper lies, and that the web part (8 ") of the U-shaped intermediate member is bent symmetrically in a V-shape, so that the Z ugfeder (6) engages in the middle of the intermediate link and is guided. 2. Windshield wiper according to claim 1, characterized in that the U-legs (8 ') are formed approximately perpendicular to the plane of the intermediate member (8) V-, U- or arcuate. 3. Windshield wiper according to Claims 1 and 2, characterized in that the fastening screw (4) is exposed on all sides in the folded away state of the windshield wiper. Considered publications:
French patent specification No. 1 226 503. 1 sheet of drawings 709 * 39/334 8. «7 <J BundesdruckereiBerIin