DE10034790A1 - Windscreen wiper device for vehicle; has wiper blade with a wiper rubber having two opposite longitudinal grooves for spring rails of support element and adapter element to fix blade to wiper arm - Google Patents

Abstract

The device (1) has a wiper blade with a wiper rubber (2) having two opposite longitudinal grooves (3). A support element has two spring rails (4) that fit in the grooves. An adapter element (7) fixes the wiper blade to a wiper arm (8). Both spring rails are connected by the adapter element or by at least one connection element (17). The wiper rubber has openings or slits (13,14) in which sections of the adapter element or connection element fit. An Independent claim is included for a method to mount a windscreen wiper device.

Description

The invention relates to a wiper device, in particular for motor vehicles, with a wiper blade, which a Squeegee with two opposing longitudinal grooves and a support element in the form of two in the longitudinal grooves arranged, band-like elongated spring rails has, arranged on the support member Adapter element for connecting the wiper blade to a drivable wiper arm, the two spring rails by means of the adapter element and / or at least by means of a connecting element are connected to each other. The The invention also relates to a wiper blade and a method for mounting such a wiper.

With such a wiping device, this ensures Carrying element in the form of the two elongated Spring rails optimal distribution of the wiper arm outgoing wiper blade contact pressure to the one to be wiped  Disc. For this purpose, the carrying element is in the unloaded state, if the wiper blade does not touch the window, pre-bent accordingly and has a curvature that in Longitudinal direction of the wiper blade can vary. The Carrying element of such a wiper device thus replaced the elaborate support bracket construction with two in the Squeegee arranged spring rails, like them has become known for example from DE 15 05 357.

Connecting elements are known from DE 197 29 864 become in at the free ends of the wiper blade Extend transversely and the opposite Connect the spring rail ends together. Such Fasteners, in the document mentioned as a holder referred to consist of several interconnected Bracket parts on the ends of the spring rails are attached. Disadvantage of such a state of Technology is that consisting of several holder parts Brackets are difficult to assemble. Besides, it is not ensures that the brackets under greater loads, for example when driving through the vehicle Car wash, due to the on the wiper acting brush and rag cleaning systems, not  to be dismantled, causing the inoperability of the Wiping device results. Another disadvantage of one Such known wiping device is that the Section of the squeegee facing away from the pane, in particular a spoiler-like approach, in the area where the holder are arranged, is cut out. Also in the area in which the adapter element on the two spring rails is arranged, the squeegee or the spoiler-like Cut out the base of the squeegee. large-scale Incisions or cutouts on the one to be wiped Side of the squeegee facing away from the disc for the arrangement of the Lead connecting elements or the adapter element especially at higher vehicle speeds unwanted wind noise. In addition, in the cut out areas accumulations of dirt, leaves or form snow or ice, which negatively affects the wiping behavior influence.

The present invention is therefore based on the object to create a wiper device that the mentioned disadvantages remedies.  

This task is the beginning of a wiper described type according to the invention solved in that the Wiper rubber in the area of the adapter element and / or the at least one connecting element openings or Has slits through which sections of the Adapter element and / or the connecting element protrude.

Such a wiper device has in particular Advantage that due to the breakthroughs or slits, through which sections of the adapter element or Protruding connecting element, no cutting out large sections of the squeegee is required so that wind noise is minimized and edges or Undercuts to accumulate unwanted media be avoided. Especially if that of the disc opposite side of the squeegee a spoiler-like approach has, it is ensured according to the invention that the Contact pressure due to the spoiler-like approach acting wind load at higher vehicle speeds evenly and trouble-free on the wiping the pane Wiper lip is initiated. According to the invention there are none Cut out large sections for recording  of the apater element or connecting element required, whereby the functionality of the wiper device is not can be adversely affected.

In addition, there are no material recesses for attaching the Adapter element and at least one Fastener largely, making it easier to dispose of Waste is avoided.

Another advantage of the invention is that none Cover caps are required, which according to the state of the Technology connecting the two spring rails together Cover fasteners.

In a preferred embodiment of the invention, the Cross section of the breakthrough or the slit in Squeegee, in particular in the longitudinal direction of the wiper blade, larger than the cross section of the breakthrough or the Slotted through section of the adapter and / or of the connecting element. This ensures that a relative shift in between the two Wiper rubbers arranged in the longitudinal direction of the spring rails Wiper blade not due to the arrangement of the adapter element  or the at least one connecting element becomes. Due to the displaceability of the squeegee the two spring rails in the longitudinal direction of the wiper blade can optimally adjust the wiper lip of the squeegee on the window to be wiped.

In another embodiment of the invention provided that the connecting elements as flat steels or sheets are formed. Such fasteners are very cheap, especially in large series production and cost-effective to manufacture and handle.

In a development of the invention that is at least a connecting element welded to the spring rails, especially spot welded, riveted, glued or on arranged similar way. This will make a fast and inexpensive connection of the Connection element with the spring rails guaranteed. However, when welding the connecting element with the spring rails to ensure that there is no damage of the arranged between the two spring rails Wiping rubbers are prevented due to the welding process.  

Another embodiment of the invention provides that a at least one adapter recess or slot of the Wiping rubber penetrating adapter element and at least two two connecting element openings or slots of the squeegee through connecting elements available are. Such an arrangement has proven special proven favorable. It also makes the Torsional stiffness as well as the bending stiffness across Wiper blade axis increased. This brings a reduction in Chatter and vibration tendency of the wiper blade especially higher vehicle speeds.

In another embodiment of the invention be provided that the adapter element and / or that Connecting element facing away from each other, in Longitudinal direction of the wiper blade extending narrow sides of the Reach around or behind the spring rails. Through such a or reaching behind the connecting element that forms Connecting element a stop for the two Spring rails, which means that they are precisely positioned with the Adapter element or the at least one connecting element can be permanently connected.  

Another embodiment of the invention stands out characterized by the fact that it encompasses the spring rails Adapter element and / or connecting element due to Elasticity of the arranged between the spring rails Squeegees the spring rails together with squeegee to each other fix. This allows a further component or a permanent joining in the form of welding, riveting or Glue the adapter element or at least one No connecting element with the two spring rails. Due to the inherent elasticity of the squeegee, it lasts the spring rails functionally reliable in that the Adapter and / or Connecting element.

In a variant of the invention, the spring rails have Notches to accommodate the spring rails around or engaging connecting element sections. by virtue of Such notches can be largely flat Spring rail contour can be achieved, which leads to a Reduction of wind noise and to reduce the Risk of injury due to the flush in the notch fitted connector leads.  

The adapter element is advantageously in one piece, in particular as a cold molded part, sintered part, cast part or the like. educated. Such an adapter element can easily and especially inexpensive in large series production Way to be made.

In another, particularly preferred embodiment of the Invention has the at least one connecting element and / or the adapter element has a self-tapping edge on the when installing the wiper associated breakthrough or slot in the Squeegee cuts. This is advantageously omitted punching out or cutting out the opening or Slit on the squeegee, resulting in cost savings Consequence.

In another advantageous embodiment of the invention the adapter element is fork-shaped, the Spring rails across the prongs of the fork on these are arranged. This has the particular advantage that the Bending behavior of the two spring rails and thus the entire wiper blade due to the arrangement of the Adapter element to the  two spring rails not or only very slightly is affected.

The task mentioned at the beginning is also with a Wiper blade one described above Wiping device released.

Furthermore, a method for assembling one is described Wiping device proposed, the self-tapping Edge of the connecting element and / or the adapter element across the longitudinal direction of the wiper blade into the squeegee is introduced and a breakthrough or a slit in the squeegee cuts. This is advantageously eliminated a punching or cutting of the breakthrough or Slit in the squeegee.

Further advantageous refinements and details of Invention can be found in the following description, in of the invention with reference to that shown in the drawing Exemplary embodiments are described and explained in more detail.

Show it:

Fig. 1 shows a wiper device according to the invention in side view;

Fig. 2 is a perspective view of the end portion of the wiper blade shown in Fig. 1;

FIG. 3 shows a cross section through the end section according to FIG. 2;

Fig. 4 is a perspective view of an end portion of a wiper blade of another embodiment of the invention;

FIG. 5 shows a cross section through the end section according to FIG. 4;

Fig. 6 is a plan view of a detail of FIG. 4;

Fig. 7 is a plan view of an adapter element;

FIG. 8 shows a cross section through the adapter element shown in FIG. 7; and

Fig. 9 the view acc. Arrow IX of FIG. 7.

The wiper device 1 for motor vehicles shown in FIG. 1 has a wiper blade which comprises a wiper rubber 2 with two longitudinal grooves 3 lying opposite one another - only one longitudinal groove being visible in the view according to FIG. 1 - in which two band-like elements as the carrying element elongated spring rails 4 are arranged. An adapter element 7 for connecting the wiper blade to a drivable wiper arm 8 is provided on the two spring rails 4 . The end of the wiper arm 8 facing the wiper blade is designed in a hook-like manner and engages in sections around a hinge pin 9 arranged on the adapter element 7 . In order to achieve an increased contact pressure of the wiper device 1 on the pane to be wiped, not shown, in particular at higher vehicle speeds, the side of the wiper blade 2 facing away from the pane has a spoiler-like attachment 12 . The side of the wiper rubber 2 facing the window forms a wiper lip 19 .

In the area of the free ends and of the adapter element 7 , the squeegee 2 has openings or slits 13 and 14 , through which sections of the adapter element 7 or two connecting elements 17 , which serve to connect the opposing spring rails 4 , protrude.

As is clear from FIG. 2, the connecting element 17 projecting through the slot 14 of the wiper rubber 2 is rigidly connected to the two spring rails 4 by means of a spot weld 18 . The connecting element 17 is designed as a flat steel.

In Figs. 4 to 6, another embodiment of the invention, 23 of the spring rails 4 is shown, in which a connecting element 22 facing away from each other, extending in the longitudinal direction of the wiper blade narrow sides implement and engages behind. The spring rails 4 have notches 24 for receiving the connecting element sections encompassing or engaging around the spring rails 4 , as a result of which a largely flush contour of the connecting element 22 with the two spring rails 4 is achieved.

In FIGS. 2 and 4, the longitudinal extension of the slot 14 is designated 5. This is longer than the width of the connecting element 17 or 42 in the longitudinal direction of the wiper blade. In particular, this enables a relative movement of the wiper rubber 2 with respect to the two spring rails 4 in the longitudinal direction of the wiper blade, which contributes to an improved wiping result.

Advantageously, a rigid connection of the connecting element 22 with the two spring rails 4 by for example welding, riveting or gluing, in the embodiment according to Fig. 4 to 6 are not required. Due to the elasticity of the squeegee 2 , which is arranged between the two spring rails 4 , the two spring rails 4 are pressed against the sections of the connecting element 22 encompassing the spring rails 4 . This enables the squeegee 2 and the two spring rails 4 to be fixed between the connecting element 22 without further aids.

FIGS. 7 to 9 show an inventive adapter element, the fork-shaped configuration of the adapter member 7 is clear, the spring rails 4 of the fork in these are rigidly mounted by means of spot welds 18 transversely to the prongs 27. Due to the fork-shaped configuration of the adapter element 7 , the wiper rubber provides a separate opening or slit 13 for each prong 27 . On the side of the adapter element 7 facing away from the prongs 27 , the hinge pin 9 can be clearly seen, on which the pivotable drivable wiper arm 8, not shown in this figure, can be arranged.

From the section shown in Fig. 8, indicate that the prongs 27 project through the fork-shaped connecting member 7 through the opening or slot 13 of the wiper blade rubber 2.

Fig. 9, in which a region of the spoiler-like extension 12 is shown clearly shows that the longitudinal extent S of the slot 13 is greater than the width of the tine 27 , so that a relative movement of the squeegee 2 with respect to the spring rails 4 through the the adapter element 7 is not impaired.

As an alternative to the embodiment of the adapter element 7 shown in FIGS . 7 to 9, it can be provided that the free ends of the two prongs 27 have a self-tapping edge which, when the adapter element is installed, is introduced into the wiper blade transversely to the longitudinal direction of the wiper blade and thereby the opening or cuts the slit 13 in the squeegee.

Accordingly, it is conceivable that the connecting element 17 shown in FIG. 2 has a self-tapping edge which cuts the slot 14 into the wiper rubber when the connecting element is inserted transversely to the longitudinal direction of the wiper blade.

All in the description, the following claims and The features shown in the drawing can be both individually as well as in any combination with each other be essential to the invention.

Claims (13)

1. wiper device ( 1 ), in particular for motor vehicles, with a wiper blade, which has a wiper rubber ( 2 ) with two opposing longitudinal grooves ( 3 ) and a support element in the form of two strip-like elongated spring rails ( 4 ) arranged in the longitudinal grooves ( 3 ) with an adapter element ( 7 ) arranged on the support element for connecting the wiper blade to a drivable wiper arm ( 8 ), the two spring rails ( 4 ) being connected to one another by means of the adapter element ( 7 ) and / or at least by means of a connecting element ( 17 , 22 ) are connected, characterized in that the wiper rubber ( 2 ) in the area of the adapter element ( 7 ) and / or the at least one connecting element ( 17 , 22 ) has openings or slits ( 13 , 14 ) through which sections of the adapter element ( 7 ) and / or the connecting element ( 17 , 22 ) protrude through it. 2. Wiper device according to claim 1, characterized in that the cross section of the opening or the slot ( 13 , 14 ) in the wiper rubber ( 2 ), in particular in the longitudinal direction of the wiper blade, is larger than the cross section of the opening or the slot ( 13 , 14 ) through adapter element ( 7 ) and / or connecting element ( 17 , 22 ). 3. Wiper device ( 1 ) according to claim 1 or 2, characterized in that the connecting elements ( 17 , 22 ) are designed as flat steels or sheets. 4. Wiper device ( 1 ) according to claim 1, 2 or 3, characterized in that the connecting element ( 17 ) welded to the spring rails, in particular spot welded, riveted, glued or the like. is. 5. Wiper device ( 1 ) according to one of the preceding claims, characterized in that an at least one adapter recess or slot ( 13 ) of the wiper rubber ( 2 ) penetrating adapter element ( 7 ) and at least two two connecting element openings ( 14 ) or slots of the Interconnecting elements ( 17 ) through wiper rubbers are present. 6. Wiper device according to one of the preceding claims, characterized in that the adapter element ( 7 ) and / or the connecting element ( 22 ) encompass or engage around the narrow sides ( 23 ) of the spring rails ( 4 ) which face away from one another and extend in the longitudinal direction of the wiper blade. 7. Wiper device according to claim 6, characterized in that the spring rails (4) engaging around the adapter element and / or connecting element (22) due to the elasticity of which is arranged between the spring rails wiper blade rubber, the spring rails (4) together with the wiper blade (2) fixed to each other (2) , 8. Wiper device according to claim 6 or 7, characterized in that the spring rails ( 4 ) notches ( 24 ) for receiving the spring rails ( 4 ) encompassing or engaging behind connecting element and / or adapter element sections. 9. Wiper device according to one of the preceding claims, characterized in that the adapter element ( 7 ) in one piece, in particular as a cold-molded part, sintered part, cast part or the like. is trained. 10. Wiper device according to one of the preceding Claims, characterized in that at least a connecting element and / or the adapter element has self-tapping edge during assembly the wiping device the associated breakthrough or associated slit cuts in the squeegee. 11. Wiper device according to one of the preceding claims, characterized in that the adapter element ( 7 ) is fork-shaped, wherein the spring rails ( 4 ) are arranged transversely to the prongs ( 27 ) of the fork thereon. 12. Wiper blade of a wiper device one of the previous claims. 13. The method for assembling a wiper device ( 1 ) according to one of claims 10 to 12, characterized in that the self-tapping edge is inserted transversely to the longitudinal direction of the wiper blade in the squeegee and thereby cuts an opening or a slit in the squeegee.