CN115805898A

CN115805898A - Wiper blade for windshield wiper

Info

Publication number: CN115805898A
Application number: CN202211109881.1A
Authority: CN
Inventors: C·维尔姆斯
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2021-09-14
Filing date: 2022-09-13
Publication date: 2023-03-17
Also published as: DE102021210126A1

Abstract

The invention relates to a wiper blade for a windshield wiper, comprising a wiper element (2) having a main body (21), a retaining region (22) and a wiping lip (20), which has a spoiler (6) which is arranged on the wiper element (2), wherein the main body (21) has two adjacent connecting webs (21A, 21B), wherein the spoiler (6) has two supporting webs (6D, 6E) which are connected to a central region (6B) and which are arranged adjacent to the connecting webs (21A, 21B) with a spacing (23, 24) maintained, and wherein at least one damping element (19) is arranged between the connecting webs (21A, 21B) and the supporting webs (6D, 6E).

Description

Wiper blade for windshield wiper

Technical Field

The invention relates to a wiper blade for a windshield wiper with reduced noise generation during a wiping operation and to a windshield wiper having such a wiper blade.

Background

Wiper blades for windshield wipers are known from the prior art in different designs. In operation, the wiper lip of a wiper blade typically slides over the glass. Due to the friction and possible vibrations of the wiper blade associated therewith, noise generation in different frequency ranges, in particular in the range of 40 hz to 800 hz, can occur during the wiping operation. In this case, studies carried out within the scope of the invention have shown that undesirable operating noises can occur if the wiper element is fastened too firmly. It is therefore desirable for the wiper blade to have no or only reduced noise generation during operation.

Disclosure of Invention

In contrast, a wiper blade according to the invention with a windshield wiper having the features of claim 1 has the following advantages: noise generation during operation of the wiper blade can be significantly reduced. In particular, oscillations and vibrations of the wiper blade during operation, in which the wiper blade runs across a window or the like and is pressed against the window with a certain contact pressure, can be avoided. This is achieved according to the invention in that at least one damping element is arranged between a support tab of the spoiler and at least one connecting tab of the wiper element body. The damping element can be produced by co-extrusion from the same material as the material of the spoiler or from a material having a very low coefficient of friction in order to ensure that the wiper element can be moved in the longitudinal direction in a simple manner, so that movement or transient noises can be reduced or even completely avoided. Furthermore, the width tolerance of the spoiler gap can be taken into account by providing at least one damping element. If the two lateral supporting webs of the spoiler clamp the wiper element too firmly, this clamping occurs only locally due to the damping element, and since the friction of the damping element is very low, a longitudinal movement of the wiper element can still be ensured.

Since, advantageously, due to this clamping only "locally", the width between the two lateral support webs can either be designed to be slightly less narrow or narrower, it is ensured that the wiping lip of the wiper element can remain in contact with the carrier element during a reverse movement. Since optionally both sides of the wiper element can be equipped with at least one damping element (preferably with a plurality of damping elements) such that both damping elements can slide over each other, it can be ensured that the wiping lip of the wiper element remains in contact with the carrier element during the reverse movement. Furthermore, according to the invention, it is provided that the main body has two spaced-apart connection tabs and the spoiler has two spaced-apart support tabs which are arranged adjacent to the connection tabs of the main body while maintaining the resulting spacing. The idea according to the invention is therefore to arrange at least one damping element between at least one connecting web of the main body and at least one support web of the spoiler.

The dependent claims show advantageous developments of the invention.

It is preferably possible for the connecting web and the support web to be each oriented at least approximately parallel to one another.

Preferably, the damping element can be designed as a bulge or projection, which is preferably designed at least in a manner similar to a ball.

Furthermore, it is preferably possible for the damping element to be arranged only on one side between the at least one connecting web and the at least one supporting web.

Alternatively, however, it is also possible to provide a plurality of damping elements, which may be provided on both sides of the connecting webs and the support webs.

One or more damping elements may be mounted on either the at least one connection tab or the at least one support tab.

If a plurality of damping elements are provided, it is also possible for these to be mounted both on the support lugs and on the connection lugs. For example, it is possible here for two damping elements to be mounted on the body of the wiper element and for one damping element to be mounted on the support tab of the spoiler, wherein in this case it can be considered that the damping element of the spoiler projects into the intermediate space between the two damping elements of the retaining body.

Furthermore, it is possible according to the invention that the damping element or the damping elements extend only over a part of the length of the wiper element or alternatively over the entire length of the wiper element. This results in the following advantages: according to the invention, it is possible to adapt the structure of the respective wiper element of the wiper blade in a simple manner. .

Finally, the damping element or elements can be made of the same material as the material of the spoiler.

Alternatively, a material with a very low coefficient of friction can also be selected as the material of the damping element or elements.

The invention further relates to a windshield wiper, in particular of a vehicle, having a wiper blade according to the invention. The windshield wiper is preferably designed as a front-glass or rear-glass windshield wiper. The vehicle is preferably a motor vehicle.

Drawings

Preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Figure 1 shows a schematic perspective view of a wiper blade according to a first embodiment of the present invention,

fig. 2 shows a schematic, slightly simplified side view of a wiper blade with a spoiler according to fig. 1, an

Fig. 3 shows a view of an alternative embodiment of the wiper blade corresponding to fig. 2.

Detailed Description

In the following, two preferred embodiments of a wiper blade 1 according to the invention are described in detail with reference to fig. 1 to 3.

A wiper blade 1 of a vehicle comprises a wiper element 2 on which a spoiler 6 is arranged as shown in fig. 1 to 3. The wiper blade 1 is connected to a wiper arm, not shown, of a windshield wiper by means of an adapter 7.

The wiper element 2 of the wiper blade 1 can be seen in detail in fig. 2 and 3.

As is shown in particular in fig. 2, the wiper element 2 comprises a wiping lip 20, a body 21 and a retaining region 22. In this embodiment, the scraping lip 20, the body 21 and the holding area 22 are made of the same material.

The wiper blade 1 further comprises a stiffening device 3, which is visible in detail in fig. 2 and 3. The reinforcing device 3 includes a first reinforcing plate 31 and a second reinforcing plate 32. As shown in fig. 2 and 3, the two reinforcement plates 31, 32 extend parallel to each other and have a length corresponding to the length of the wiper element 2.

Here, the two reinforcing plates 31, 32 are held in the intermediate space between the holding region 22 and the main body 21. The holding region 22 has a T-shape in cross section. The reinforcing plates 31, 32 can be clamped between the cross-members of the T-shape of the body region 22 and the upper side of the body 21.

The wiper element 2 further has a through-opening 4 which extends in the longitudinal direction of the wiper element 2. The through-opening 4 is formed only in the body 21 of the wiper element 2 and extends over the entire length of the wiper element 2.

As can also be seen from fig. 2 and 3, the spoiler 6 has a triangular upper region 6A, which is configured in the exemplary case as a right-angled triangle.

Connected to the region 6A is a central region 6B in which a beam provided with a receiving recess 6c, a t-shaped holding region 22 is arranged.

As fig. 2 and 3 also show, an intermediate beam between the cross beams is arranged between the two reinforcing plates 31, 32 and is connected to the main body 21.

The main body 21 in turn has two connecting

webs

21A, 21B arranged at a distance from one another, the

transverse webs

21C, 21D of the main body 21 being connected to one another. By arranging the

tabs

21A, 21B, 21C, 21D, the through opening 4 is defined.

Adjacent to the connecting

webs

21A, 21B, supporting

webs

6D, 6E of the spoiler 6 are arranged, which are connected to the central region 6B and form a closed region of the lower part of the spoiler 6 on the basis of the representation selected in fig. 2 and 3.

Here, the connecting

webs

21A, 21B of the main body 21 and the

support webs

6D, 6E of the spoiler 6 are arranged adjacent to one another with a

distance

23 or 24, respectively.

It is thereby possible to arrange at least one damping element 19 in the space created by the

spacings

23, 24, whereas a plurality of such damping elements 19 are arranged in the respective particularly preferred embodiment spaces shown in fig. 2 and 3.

As fig. 2 and 3 show, the damping elements 19 are each designed as at least approximately spherically shaped elevations.

As fig. 2 and 3 also show, in the case of a plurality of damping elements, these are each arranged at a distance from one another.

The difference between the

embodiments

2, 3 is that in the embodiment according to fig. 2 the damping element 19 is arranged on the

support webs

6D, 6E of the spoiler 6, whereas in the embodiment according to fig. 3 the damping element 19 is arranged on the

connection webs

21A, 21B of the retaining body 21.

Fig. 3 furthermore shows that, in this embodiment, a further damping element 19 is provided on both

support webs

6D, 6E, which engages into the intermediate space between the damping elements 19 arranged on the

connection webs

21A, 21B of the main body 21.

Claims

1. A wiper blade for a windshield wiper, said wiper blade comprising: a

A wiper element (2) having a body (21), a retaining region (22) and a wiping lip (20),

-a spoiler (6) arranged on the wiper element (2),

wherein the main body (21) has two adjacent connecting tabs (21A, 21B),

wherein the spoiler (6) has two support webs (6D, 6E) which are connected to the central region (6B) and which are arranged adjacent to the connection webs (21A, 21B) with a spacing (23, 24) maintained, and

wherein at least one damping element (19) is arranged between the connecting webs (21A, 21B) and the supporting webs (6D, 6E).

2. Wiper blade according to claim 1, wherein the connecting webs (21A, 21B) and the supporting webs (6D, 6E) are arranged at least substantially parallel, preferably exactly parallel, to one another, wherein the damping element (19) is configured as a bulge.

3. Wiper blade according to claim 1 or 2, wherein the damping element (19) is provided on only one side between the connecting tab (21A, 21B) and the supporting tab (6D, 6E).

4. Wiper blade according to one of claims 1 to 3, wherein a plurality of damping elements (19) is provided.

5. Wiper blade according to claim 4, wherein at least one damping element (19) is arranged on both sides between the connecting webs (21A, 21B) and the supporting webs (6D, 6E).

6. Wiper blade according to one of claims 1 to 5, wherein a damping element (19) or a plurality of damping elements (19) is/are arranged on at least one supporting tab (6D, 6E).

7. Wiper blade according to one of claims 1 to 6, wherein a damping element (19) or a plurality of damping elements (19) is/are arranged on at least one of the connecting tabs (21A, 21B).

8. Wiper blade according to one of claims 4 to 7, wherein a damping element (19) is arranged both on at least one of the supporting webs (6D, 6E) and on at least one of the connecting webs (21A, 21B).

9. Wiper blade according to any of claims 1 to 8, wherein a damping element (19) or a plurality of damping elements (19) extend over a part of the length of the wiper element (2) or over the entire length of the wiper element (2).

10. Wiper blade according to any of claims 1 to 9, wherein the damping element (19) or damping elements (19) are made of the same material as the material of the spoiler (6).

11. Wiper blade according to any of claims 1 to 10, wherein the damping element (19) or damping elements (19) are made of a material with a very low coefficient of friction.

12. A windscreen wiper, in particular of a vehicle, comprising a wiper blade (1) according to any of the preceding claims.