WO2002042129A1

WO2002042129A1 - Wiping device

Info

Publication number: WO2002042129A1
Application number: PCT/EP2001/012903
Authority: WO
Inventors: Eckhardt Schmid; Oliver Lenzen; Wolfgang Scholl; Heiko Ernstmeier; Andreas Fink; Oliver Blumenstock
Original assignee: Valeo Wischersysteme Gmbh
Priority date: 2000-11-23
Filing date: 2001-11-08
Publication date: 2002-05-30
Also published as: DE10058208A1; DE10058208B4

Abstract

The invention relates to a wiping device, especially for wiping vehicle windows, comprising an actuatable wiper arm, and a wiper blade. The wiper blade is arranged on said wiper arm and is comprised of a wiper blade rubber element, which has a wiper lip and two opposing longitudinal slots, and is also comprised of two strip-like, longitudinally extended spring rails located inside the longitudinal slots. The wiping device also has a connecting element for connecting the spring rails and the wiper blade rubber element to the wiper arm. The connecting element comprises two facing receiving slots for receiving the longitudinal sides, which face away from one another, of the spring rails. The invention is characterized in that a fixing element is provided between both spring rails. The fixing element is supported on the connecting element and fixes the spring rails in a positive and/or non-positive manner.

Description

wiper device

The invention relates to a wiper device, in particular for wiping vehicle windows, with a drivable wiper arm, with a wiper blade arranged on the wiper arm, consisting of a wiper rubber, the wiper rubber comprising a wiper lip and two longitudinal grooves lying opposite one another, and two in the longitudinal grooves of the wiper rubber lying, band-like elongated spring rails, and with a connecting element for connecting the spring rails and the squeegee to the wiper arm, the

Connecting element has two mutually facing receiving grooves for receiving the mutually facing longitudinal sides of the spring rails. The invention also relates to a wiper blade and a connecting element for such wiper devices.

In such wiping devices, the two spring rails ensure an optimal distribution of the wiper blade contact force emanating from the wiper arm on the pane to be wiped. For this purpose, the two spring rails are pre-bent in the unloaded state, that is, if the wiper blade is not in contact with the window, and have a defined curvature. The spring rails thus replace a complex support and claw bracket construction, as has become known for example from DE 15 05 357 AI.

From DE 197 29 864 AI an initially mentioned wiper device has become known which has a connecting element which is in two parts. The two parts are for connecting element assembly laterally on the free sides of the Spring rails pushed on and screwed together using a connecting screw. Such a connecting element is relatively complex to manufacture and to assemble.

The present invention is therefore based on the object of proposing a wiper device which is easy to assemble and in particular ensures that the two spring rails are securely fixed to the connecting element.

This object is achieved according to the invention in a wiper device of the type described in the introduction in that between the two spring rails there is a fixing element which is supported on the connecting element and which fixes the spring rails in a positive and / or non-positive manner. Such a fixing element can be inserted in a simple manner during assembly between the mutually facing sides of the two spring rails, so that the spring rails are fixed.

Advantageously, the fixing element is held perpendicular to the longitudinal axis of the wiper blade, preferably perpendicular to the plane formed by the two spring rails, at least in sections between the two spring rails and in particular can be inserted between the two spring rails. The fixing element is advantageously introduced in the direction of the main assembly axis.

In order to achieve a particularly good frictional connection between the fixing element, the two spring rails and the connecting element, it can be provided according to the invention that the section of the fixing element which can be guided between the two spring rails, in particular the free end of the fixing element, is wedge-shaped or conical is. The two spring rails are pressed into the two grooves of the connecting element during insertion of the fixing element.

In a further development of the invention, it can be provided that, in the assembled state, the section of the fixing element guided between the two spring rails does not or only slightly protrude beyond the two spring rails. This is in particular to prevent the fixing element from negatively influencing the wiping behavior of the wiper rubber or the wiper lip. In addition, due to the fixing element, no tensions or deformations are to be generated in the squeegee which have a negative effect on the wiping result.

Advantageously, it can be provided that the squeegee is spared or free in the area of the fixing element. In this way, undesirable tensions or deformations in the squeegee can be avoided.

In order to enable an advantageous form fit between the fixing element and the spring rails, it can be provided that the mutually facing regions of the spring rails have formations which correspond to the surface contour of the fixing element. By means of such a positive connection, forces acting in particular on the spring rails in the longitudinal direction of the wiper blade can be conducted into the connecting element via the fixing element supported on the connecting element. A displacement of the spring rails in the longitudinal direction of the wiper blade is therefore excluded.

Another development provides that the longitudinal sides of the spring rails facing away from one another are formed have, whose length in the longitudinal direction of the spring rails is exactly as long as or slightly longer than the length of the receiving grooves in the connecting element and that the long inner sides of the formations each abut the bottom of the receiving grooves. This measure ensures that the spring rails are securely fixed with respect to their longitudinal direction without the need for spring rail configurations for the fixing element. By means of a corresponding depth of the formations it can be achieved that the outer contour of the connecting element is aligned with the longitudinal sides of the spring rails facing away from one another.

According to the invention, it can also be provided that the longitudinal sides of the spring rails facing away from one another have formations in the area covered by the connecting element, the connecting element providing protrusions which engage in the formations. Forces of this type can also be absorbed advantageously and in a particularly simple manner by the connecting element in the longitudinal direction of the wiper blade.

XXXX

It has been shown that particularly round or angularly formed formations form a particularly good form fit.

In a further development of the invention, the formations or the protrusions are present in the center in the area covered by the connecting element. A symmetrical and in particular mirror-symmetrical arrangement of the protrusions and projections leads to a symmetrical absorption of the forces acting on the spring rails or on the wiper blade. In another embodiment of the invention, it can be provided that the fixing element is molded onto the connecting element. The advantage here is that the connecting element and the fixing element are manufactured in only one work step. During assembly, it can be provided that the fixing element shears off the connecting element with the application of a certain force and can thus be guided between the two spring rails.

A fixing pin which has a circular cross section can advantageously be used as the fixing element.

According to the invention, the fixing element designed as a fixing pin can also be designed as a dowel pin which can be pressed into a corresponding fit on the connecting element. With such a frictional connection, the dowel pin is permanently and reliably set.

It is also conceivable that the fixing element is elastically deformable. The fixing element can be pressed together by force and guided between the two spring rails. By releasing the force, the fixing element clamps between the two spring rails and / or on the connecting element.

It is conceivable that the fixing element is a dowel pin or notch pin.

In another, particularly advantageous embodiment of the invention, the cross section of the section of the fixing element arranged between the spring rails is eccentric or elliptical. This has the advantage that the distance between the two spring rails, which is predetermined by the eccentric or elliptical section, can be changed by rotating the fixing element. As a result, tolerances of the connecting element as well as of the spring rails that arise due to the production can be compensated for. By turning the fixing element, the optimal position of the fixing element can be achieved, in which the spring rails are pressed non-positively against the receiving grooves.

Another also very advantageous embodiment of the invention is characterized in that the cross section of the section of the fixing element arranged between the spring rails is rectangular or hexagonal or polygonal, the opposite surfaces of the rectangular or hexagonal or polygonal section being at different distances from one another , In this embodiment of the invention, the fixing member is so guided between the two spring rails, the mutually closest parallel to each other ^* arranged surfaces reach the quaderzapfen- or hexagonal or polygonal-like portion between the two spring rails. By turning the fixing element in the case of the cuboid-like section by 90 ° and in the case of the hexagonal section by 60 °, the two surfaces located further apart reach between the two spring rails. As a result, the two spring rails are acted upon by pressing forces which they press against the receiving grooves of the connecting element. In the hexagonal design, a further assembly position can be achieved by rotating the fixing element again by 60 °, in which the contact forces against the receiving grooves are increased again. The following applies to polygonal designs this is analogous depending on the number of parallel surface pairs.

In order to enable a defined rotation of the fixing element, it can be provided according to the invention that the fixing element has a turning means receptacle, in particular a hexagon head or an internal hexagon or a cross recess receptacle for a turning means, in particular for a wrench or a Phillips screwdriver.

A further embodiment of the invention provides that the section of the fixing element projecting beyond the two spring rails engages behind the mutually facing longitudinal sides of the two spring rails at least in sections and in particular after the fixing element has been rotated, in particular by 90 ° or 60 °. In this way it can be prevented that the spring rails deflect laterally by applying the contact pressure as a result of the twisting of the fixing element and get into an undesired position. Rather, reaching behind the spring rails prevents such undesirable deflection of the spring rails.

After the fixing element has been guided between the two spring rails and after the fixing element has been rotated, it can be provided according to the invention that the fixing element is fixed on the connecting element. Such fixing can be non-positive, positive or material. It is conceivable that the fixing element is permanently fixed to the connecting element by means of a welded, soldered, pressed, screwed or even adhesive connection.

manufacture. Connecting elements made from corresponding extruded profiles are also suitable.

The above-mentioned object is also achieved by a wiper blade or by a connecting element for a wiper device described above.

Further advantageous refinements and details of the invention can be found in the following description, in which the invention is described and explained in more detail with reference to the exemplary embodiments shown in the drawing.

Show it:

Figure 1 shows the wiper blade of an inventive

Wiper device in perspective view,

Figure 2 shows the connecting element of the wiper blade according to Figure 1 in individual parts;

Figures 3 and 4

Cross sections through the connecting element according to Figure 2,

5 and 6 different top views of two differently designed pairs of spring rails of a wiper blade according to FIG. 1,

FIGS. 7, 8 and 9 different designs of a fixing element according to the invention, Figures 10, 11 and 12 a further embodiment of a fixing element according to the invention in different views, and

Figures 13 and 14 another embodiment of a fixing element according to the invention.

FIG. 1 shows a wiper blade 1 of a wiper device according to the invention for wiping vehicle windows. The wiper blade 1 shown has a wiper rubber 3 with a wiper lip 5 and a spoiler-like attachment 7 arranged on the side facing away from the wiper lip 5. The squeegee 3 further provides two opposing longitudinal grooves 9, in each of which a band-like, elongated spring rail 11 is located.

In addition, a connecting element 13 for connecting the spring rails 11 together with the wiper rubber 3 to a drivable wiper arm (not shown) is arranged centrally on the wiper blade 1. For arrangement on the wiper arm, the connecting element 13 has a longitudinal groove 15 in the center on its side facing away from the wiper lip 5 and two indentations 17 on the right and left on the outer sides. The connecting element 13 furthermore has, in the center, a receptacle 19 running perpendicular to the longitudinal axis for receiving a fixing element in the form of a fixing pin 21.

The connecting element 13 is formed in one piece and is preferably a cast part. It can also be advantageous if the connecting element 13 is made from an extruded profile with a corresponding cross-sectional shape. As Material for the connecting element 13 is in particular a metallic as well as a non-metallic material, for example a plastic.

Figure 2 shows the connecting element 13 without the squeegee 3 and the spring rails 11 as a single part, the fixing pin 21 being shown in the non-assembled position. It is located above the cylindrical receptacle 19 and can be inserted into the receptacle 19 along the axis x.

On its underside, the connecting element 13 has two receiving grooves 23, which are provided for receiving the mutually facing longitudinal sides 25 and 27 of the spring rails 11 shown for example in FIGS. 3 and 4.

FIG. 3 shows a preassembly position in which the fixing pin 21 is already present in sections in the receptacle 19 of the connecting element 13.

In an extension of the receptacle 19, the squeegee 3 has a cutout 29 for receiving the free end 31 of the fixing pin 21 facing the squeegee 3.

The wiper rubber 3 does not have a spoiler-like attachment 7 on the side facing away from the wiper lip 5 in the central region of the connecting element 13. The spoiler-like approach 7 is left out in this area. Rather, as clearly shown in FIG. 2, the connecting element has a transverse groove-like indentation 30 in its central region. However, on the free end faces of the connecting element 13 there are receiving sections 32 which correspond to the contour of the spoiler-like extension 7 and are provided for receiving the spoiler-like extension 7 in the area covered by the connecting element 13.

After the squeegee 3 with the two spring rails 11 is arranged on the connecting element 13 according to FIG. 3, for additional fixing of the spring rails 11, the fixing pin 21 is in the direction of arrow 33 between the spring rails 11 or between the mutually facing sides 35 and 37 of the spring rails 11 out. This takes place perpendicular to the plane formed by the two spring rails 11.

The fixing element in the form of the fixing pin 21, which is guided between the two spring rails 11, is shown in FIG. The free end 31 of the fixing pin 21 is present between the two spring rails 11 and presses them non-positively against the groove bases of the receiving grooves 23.

FIG. 3 and FIG. 4 show that the fixing pin 21 has a conical chamfer 41 at its end 31, so that when the free end 31 of the fixing pin 21 is guided between the two spring rails 11, the two spring rails 11 face away from one another against the groove base of the respective receiving groove 23 are pressed.

FIG. 4 also shows that, in the assembled state, the section 31 of the fixing element 21 which is guided between the two spring rails 11 does not, or only slightly, protrude beyond the two spring rails 11. The fixing pin 21 is advantageously guided just as far between the two spring rails as necessary so as not to negatively influence the wiping behavior of the wiper rubber 3 or the wiper lip 5. If the fixing pin 21 is guided too far In the direction of the arrow 33, the wiper rubber 3 can deform, which can have a negative effect on the wiping result.

To secure the fixing pin 21 in the receptacle 19, the fixing pin 21 can be pressed into the receptacle 19 in the direction of arrow 33, for example by means of a press fit. As an alternative or in addition, it is conceivable that the pin is fixed in the receptacle 19 in other ways known to the person skilled in the art. Here comes, for example, gluing, soldering, welding, caulking, pressing, screwing or the like. into consideration.

Instead of using a dowel pin 21 shown in FIG. 7, it is conceivable to provide a dowel pin 121 shown in FIG. 8 or a notch pin 222 shown in FIG. The dowel pin is sleeve-like and has a longitudinal slot 122. By applying radial forces, the dowel pin is elastically deformable and can for example be guided into the recess 29 of the connecting element 13. When the radial forces are removed, the dowel pin 121 expands and thus non-positively attaches itself to the connecting element 13.

The notch pin shown in FIG. 9 has a notch 222 running in the longitudinal direction. Due to such a notch, the notch pin 121 is elastically deformable when subjected to radial forces and can therefore be held on the connecting element 13 due to its inherent tension.

Alternatively, it is conceivable that the fixing pin 21 is molded onto the connecting element 13 according to FIG. 3. By pressing the fixing pin 21 in the direction of arrow 33 ^ Φ Q <CQ> ^• x ö <i Di er ZO> ^* d Z tϋ tϋ P ^" tϋ 2! Ω H NJ D. PJ

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Contour of the formations 40. The formations 39 and 40 shown in FIGS. 5 and 6 can alternatively also be angular or in any other meaningful contour.

On the longitudinal sides 25, 27 of the spring rails 11 facing away from one another, shapes not shown in the drawing can also be provided, which essentially extend in the longitudinal direction of the spring rails 11 and have a relatively small depth in the transverse direction of the spring rails 11. These formations extend over the entire length of the receiving grooves 23 present in the connecting element 13, so that the formations can dip into the receiving grooves 23 over the entire length thereof. A fixation of the spring rails 11 in the longitudinal direction on the connecting element 13 is also possible.

A combination of formations 39 on the mutually facing longitudinal sides 35, 37 of the spring rails 11 and of formations 40 on the longitudinal sides 25, 27 of the spring rails 11 facing away from one another can also be particularly advantageous.

Advantageously, the connecting element 13 is formed in one piece and quasi not elastically deformable. As a result, the connecting element 13 cannot yield when the spring rails 11 are fixed in particular by means of the fixing element 21.

The embodiment of the invention shown in FIGS. 10 to 12 is characterized in that a fixing element 43 is present between the spring rails 11, in which the cross section of the one arranged between the spring rails 11 Section 45 is rectangular. This is particularly clear in FIG. 12, which shows a cross section through the rectangular section 45. The section 45 accordingly has two mutually parallel surfaces 47 and 49, the spacing of the surfaces 47 from one another being smaller than the spacing of the surfaces 49 from one another. To assemble the connecting element 13, the fixing element 43 is guided between the two spring rails 11 in such a way that the surfaces 47 face the longitudinal sides of the spring rails 11 facing one another.

In a next step, the fixing element is rotated through 90 °, for example with a wrench, using a hexagon head 51. In order to simplify the rotation of the fixing element 43, the edges of the adjoining surfaces 47 and 49 are rounded, as shown in FIG. 12. By turning the fixing element 43, the two surfaces 49, which are further apart, reach between the two spring rails 11. As a result, the two spring rails 11 are moved in a direction facing away from one another and pressed against the groove bases of the receiving grooves 23. In order to prevent deflection of the spring rails 11, the fixing element 43 has a T-shaped projection 53 on its side facing away from the hexagon head 51. The T-shaped projection 53 is only molded onto the surfaces 49 in order not to impede the insertion of the fixing element 43 between the two spring rails. In the assembly position shown in FIG. 11, the T-shaped projection 53 engages behind the sides of the spring rails 11 which face one another. This ensures that the spring rails 11 are permanently and reliably held.

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Claims

claims

1. Wiper device, in particular for wiping vehicle windows, with a drivable wiper arm, with a wiper blade (1) arranged on the wiper arm, consisting of a wiper rubber (3), the wiper rubber

(3) comprises a wiper lip (5) and two opposing longitudinal grooves (9), as well as two band-like elongated spring rails (11) lying in the longitudinal grooves (9) of the squeegee (3), and with a connecting element (13) for connection the spring rails (11) and the wiper rubber (3) with the wiper arm, the connecting element (13) having two mutually facing receiving grooves (23) for receiving the mutually facing longitudinal sides of the spring rails (11), characterized in that between the two spring rails ( 11) there is a fixing element (21, 121, 221, 43, 55) which is supported on the connecting element (13) and which holds the spring rails

(11) positively and / or non-positively fixed.

2. Wiper device according to claim 1, characterized in that the fixing element (21, 121, 221, 43, 55) perpendicular to the longitudinal axis of the wiper blade, preferably perpendicular to the plane formed by the two spring rails (11), at least in sections between the two spring rails (11) supported and in particular between the two spring rails (11) can be inserted.

3. Wiper device according to one of claims 1 or 2, characterized in that the section arranged between the two spring rails (11), in particular the free end (31) of the fixing element, is wedge-shaped or conical.

4. Wiper device according to one of the preceding claims, characterized in that the section (31) of the fixing element present between the two spring rails (11) does not or only slightly projects beyond the two spring rails (11).

5. Wiper device according to one of the preceding claims, characterized in that the wiper rubber

(3) in the area of the fixing element (21, 121, 221, 43, 55) has a cutout or cutout (19).

6. Wiper device according to one of the preceding claims, characterized in that the mutually facing regions of the spring rails (11) have formations (39) which correspond to the surface contour of the fixing element (21).

7. Wiper device according to one of the preceding claims, characterized in that the mutually facing longitudinal sides of the spring rails (11) have formations whose length in the longitudinal direction of the spring rails (11) is as long as or slightly longer than the length of the receiving grooves (23 ) in the connecting element (13) and that the long inner sides of the formations each abut the bottom of the receiving grooves (23).

8. Wiper device according to one of the preceding claims, characterized in that the mutually facing longitudinal sides of the spring rails (11) have formations (40) in the area covered by the connecting element (13), the Connection element (13) in the formations (40) engaging projections.

9. Wiper device according to claim 6, 7, 8, characterized in that the formations (39, 40) are round or angular.

10. Wiper device according to claim 6, 8, 9, characterized in that the formations (39, 40) or the protrusions are present in the center in the area covered by the connecting element (13).

11. Wiper device according to one of the preceding claims, characterized in that the fixing element (21) is integrally formed on the connecting element (13).

12. Wiper device according to one of the preceding claims, characterized in that the fixing element (21) is a fixing pin, which preferably has a circular cross section.

13. Wiper device according to one of the preceding claims, characterized in that the fixing element is a dowel pin (21).

14. Wiper device according to one of the preceding claims, characterized in that the fixing element (121, 221) is elastically deformable.

15. Wiper device according to one of the preceding claims, characterized in that the fixing element is a roll pin (121).

16. Wiper device according to one of the preceding claims, characterized in that the fixing element is a notch pin (221).

17. Wiper device according to one of the preceding claims, characterized in that the cross section of the section (45) of the fixing element (55) arranged between the spring rails is eccentric or elliptical.

18. Wiper device according to one of the preceding claims, characterized in that the cross section of the section (45) of the fixing element (43) arranged between the spring rails (11) is rectangular or hexagonal or polygonal, with the mutually opposite surfaces (47 or 49) of this section (45) have different distances from one another.

19. Wiper device according to one of claims 14 or 15, characterized in that the fixing element (43, 55) has a rotary means receptacle (57), in particular a hexagon head (51) or an internal hexagon or a cross recess for a rotating means, in particular a wrench or a Phillips screwdriver , having .

20. Wiper device according to one of the preceding claims, characterized in that the section (53) of the fixing element (43, 55) projecting beyond the two spring rails (11) has at least the mutually facing longitudinal sides of the two spring rails (11) in sections, and in particular after turning the fixing element (43, 55) by 90 ° or 60 °.

21. Wiper device according to one of the preceding claims, characterized in that the fixing element (21, 121, 221, 43, 55) is fixed on the connecting element (13).

22. Wiper device according to one of the preceding claims, characterized in that the connecting element (13) has a receptacle (19) for the fixing element (21, 121, 221, 43, 55) which runs centrally, perpendicular to the longitudinal axis.

23. Wiper device according to one of the preceding claims, characterized in that the connecting element (13) is formed in one piece and not elastically deformable.

24. Wiper device according to one of the preceding claims, characterized in that the wiper rubber

(3) has a spoiler-like extension (7) on its side facing away from the window.

25. Wiper device according to one of the preceding claims, characterized in that the area of the connecting element (13) facing the spring rails (11) and the wiper rubber (3) corresponds to the contour of the spring rails (11) and the wiper rubber (3).

26. Wiper device according to one of the preceding claims, characterized in that the connecting element (13) is a cast part from one is metallic or non-metallic material or is made from an extruded profile made of metallic or non-metallic material.

27. Wiper blade (1) for a wiper device according to at least one of the preceding claims.

28. Connecting element (13) for a wiper device or for a wiper blade (1) according to at least one of the preceding claims.