DE102007024557A1 - Wiper blade mounting at the wiper arm, for a vehicle windscreen, has a hook with an adapter across the blade when in place to reduce the mounting height - Google Patents

Abstract

The mounting (5) for a wiper blade (6) with a wiper lip, at the wiper arm for a vehicle windscreen, has a hook (15) with the hook sections (16-18) defining a hook plane. An adapter (12) at the wiper blade is attached to the hook in a positive fit, to be installed and removed. When the wiper blade is attached to the arm, the hook plane lies across the wiper blade plane. The adapter is in a release fitting at the blade.

Description

The The invention relates to a fastening device between a wiper arm and a wiper blade of a wiper system for a vehicle window according to the generic term Claim 1, on a wiper arm / wiper blade assembly with such Fastening device according to the preamble of claim 20 and on a wiper system according to the preamble claim 21st

fasteners for detachable connection of wiper blades with wiper arms are known in different versions. A very common one Type of solvable Attachment of wiper blades on wiper arms provides, the free end of the wiper arm as a hook form, which with its defined by the hook sections or clamped hook plane substantially perpendicular to the vehicle window is oriented and on which the wiper blade in question by attaching an am Wiper blade provided adapter form-fitting and pivotable at the same time can be attached. For example, by folding and lockable Locking means will be the positive connection between the Hook and wiper blade secured.

Even though this training because of their simple construction and in particular also their simple, the user easy to understand handling advantages However, this known training but requires a relatively large height, d. H. when fitting against the vehicle window wiper blade is a relatively large Distance between the wiper arm and the vehicle window, both visually as well as fluidically is disadvantageous. Also the stability and backlash of the connection between Wiper arm and wiper blade is not satisfactory in all cases.

Especially when using flat wiper blades, which is essentially only from the wiper lip having a squeegee, at least a spring rail connected to the squeegee, from an adapter for fixing the wiper blade on the wiper arm and possibly also nor from the at least one spring rail with the squeegee connecting Completion pieces consist of the ends of the wiper blade, and with which a low Design is sought, is the high design of the hook and the on the hook adapted adapter in known fastening devices visually and also aerodynamically disadvantageous.

task the invention is to show a fastening device, with the other hand reduced height can be realized. To the solution This object is a fastening device according to the Claim 1 is formed. A wiper arm / wiper blade arrangement is the subject of claim 20. A wiper system for a vehicle window is the subject of claim 21.

at invention, the hook formed on the wiper arm is oriented in such a way that that its hook plane spanned between the hook sections is transverse runs to the wiper blade level, wherein the wiper lip in the unloaded state of the wiper blade these the longitudinal extension including the wiper blade Wiper blade level defined.

If it is assumed that this wiper blade plane is in working position, d. H. when fitting against the vehicle window wiper blade, vertical or is substantially perpendicular to the vehicle window, then runs according to the invention the hook plane parallel or substantially parallel to the vehicle window. This alone results in a reduction in the height of the fastening device or in the area of the connection between the wiper arm and the wiper blade.

The Assembly and disassembly of the wiper blade is with the inventive design for the User even further simplified as this immediately and without a long to think can recognize how to make the connection between wiper blade and wiper arm or to solve is.

Of the Wiper arm can also be easily and inexpensively manufactured in the invention because special adapters on the wiper arm for the releasable attachment of the respective Wiper blade even with flat wiper blades are not required.

Under "hooks" is in the sense of Invention generally a hook-shaped formed recess for positive reception of the wiper blade side To understand adapters, but especially designed as a hook End of the wiper arm or a wiper arm element.

In the preceding and following observations or descriptions, which relate to the spatial orientation or to the orientation of parts of the fastening device or in the comparison or compared to the vehicle window, is neglected for better understanding that vehicle windows usually not exactly plan but are formed with a curvature. Furthermore, we neglect that, as a rule, to optimize the wiping quality of the wiped surface field, not always and not in every position of the wiper blade within the wiping field, the wiping blade plane is aligned exactly perpendicular to the surface of the wafer. Rather, the wiping of the disc takes place with a so-called attack angle of the wiper blade, ie the wiper leaf plane in relation to the disc surface, which changes in the course of the wiping movement over the wiping field. Depending on the geometry of the disk and the design of the wiper system, this angle of attack may deviate by ± 0-10 ° and, in some more exceptional cases, by ± 0-15 ° from the normal, ie from the vertical position of the wiper blade plane to the disk surface ,

further developments The invention are the subject of the dependent claims. The invention is in Explained below with reference to the figures of exemplary embodiments. It demonstrate:

1 and 2 a wiper arm together with a wiper blade attached to the wiper arm in plan view and in side view;

3 the wiper arm and the wiper blade in perspective view;

4 in an enlarged perspective detail view of a device for releasably connecting the wiper arm with the wiper blade according to the invention;

5 a representation similar 4 , but with partly broken wiper blade side adapter;

6 a plan view of the fastening device, with partially broken adapter;

7 a sectional view through the wiper blade, through the fastening device and through the hook designed as the end of the wiper arm;

8th - 10 Representations similar to the 1 - 3 in a modified embodiment;

11 in plan view, the wiper arm and a wiper arm on the wiper arm via a fastening device releasably connected according to a further embodiment;

12 the wiper blade and the end of the wiper arm carrying this wiper blade 11 in side view;

13 a representation similar 12 , but with respect to the wiper arm in a mounting position rotated or pivoted wiper blade;

14 a schematic representation of a wiper system for a vehicle windshield.

In the 1 - 7 is 1 the wiper arm of a windshield wiper system not shown in detail ( 7 ) of a road vehicle. The wiper arm 1 consists in a known manner from a bearing piece 2 for fastening the wiper arm 1 on a drivable wiper shaft of the windscreen wiper system, from a pivotable about a Wischarmgelenk with the bearing piece 2 connected joint piece 3 and a rod-like wiper arm 4 (Wischarmstange), which made of a rod-like material with a rectangular or substantially rectangular cross-section and at one end fixed to the joint piece 3 connected is. At the other, the free end of the wiper arm 1 forming end is on Wischarmelement 4 by means of a fastening device 5 the wiper blade 6 releasably secured. The bearing piece 2 , the hinge piece 3 as well as the wiper arm element 4 are z. B. each made of a metallic material, such as steel.

The wiper blade 6 is formed as a flat wiper blade and accordingly consists essentially of the wiper rubber made of a rubber-elastic material 7 with integrally formed and during the wiping operation against the vehicle window FS fitting wiper lip 8th , made of two spring steel and in grooves on the long sides of the squeegee 7 partially absorbed spring rails 9 and from, for example, made of plastic, end pieces 10 , which at the wiper blade ends the spring rails 9 and the squeegee 7 additionally connect with each other.

To form the fastening device 5 is a holder 11 provided that the squeegee 7 at its the wiper lip 8th facing away from above rider-like overlaps and on the two spring rails 9 this is also attached across (this also 7 ). The holder 11 For example, is a molded plastic, which on the with the spring rails 9 pre-assembled squeegee 7 from one end of the wiper blade 6 deferred. At the over the top of the squeegee 7 standing part of the holder 11 is an adapter 12 hinged, with a hinge pin 13 , with its a pivot axis 13.1 forming axis transverse to the longitudinal extent of the wiper blade 6 or oriented transversely to a wiper blade plane EW. The wiper blade plane EW closes the longitudinal extension of the wiper blade 6 and is the wiper blade center plane to which, in the illustrated embodiment, at least the squeegee 7 with wiper lip 8th in the unloaded state, ie when not wiping against the vehicle window wiper lip 8th , and the spring rails 9 are formed or arranged mirror-symmetrically.

The adapter 12 that's about the axis 13.1 of hinge pin 13 by a limited angular range relative to the holder 11 and thus to the wiper blade 6 is pivotable or tiltable, embraces the holder 11 hood-like or rider-like and is at two in parallel to the wiper blade plane EW extending longitudinal sides 12.1 and at one of these longitudinal sides connecting and in the illustrated embodiment circular cylindrical convex curved narrow side 12.2 with a continuous groove extending along these sides 14 Mistake.

To form the fastening device 5 is still the free, the joint piece 3 remote end of the wiper arm element 4 as a hook 15 shaped, in such a way that the hook end forming, bent and substantially rectilinear leg or hook portion 16 from the likewise substantially rectilinear, opposite hook portion 17 spaced apart and extending parallel or substantially parallel thereto. The hook sections 16 and 17 and this connecting, here arcuate hook portion 18 lie with their longitudinal extent in a common hook plane EH ( 7 ), which runs transversely to the wiper blade plane EW and thus with fitting against the vehicle window wiper blade 6 parallel or substantially parallel to the plane of the vehicle window, leaving the hook 15 is arranged "lying" relative to the vehicle window FS.

In the area of the hook 15 , ie in the region of the hook sections there 16 . 17 and 18 is the rectangular cross-section of the wiper arm 4 forming rod-shaped material oriented such that the larger cross-sectional sides of this cross section are parallel or approximately parallel to the wiper blade plane EW, ie on the inside of the hook 15 the larger cross-sectional sides of the hook portion 16 and 17 opposite each other. At the other, with the hinge piece 3 connected end of the wiper arm element 4 the cross section of this element is rotated by 90 ° or approximately 90 °. To achieve this, this is the wiper arm element 4 forming rod-shaped material according to its longitudinal axis accordingly twisted, for example on the section 19 right in front of the hook 15 so as to achieve the highest possible stability of the wiper arm 1 the larger cross-sectional dimension of the wiper arm element 4 almost over the entire length of this element in the direction or approximately in the direction of the pivoting movement of the wiper arm 1 is oriented.

At the wiper arm 1 attached wiper blade 6 embraces the hook 15 the adapter 12 in the groove 14 ie the hook sections 16 . 17 and 18 are positively received in this groove and lie over a large area against the adapter 12 on, resulting in a virtually backlash-free connection with high stability. To an unwanted loosening of the wiper blade 6 from the wiper arm 1 to prevent is the adapter 12 by latching on the hook 15 secured. The adapter 12 is this at his with the hook section 16 interacting longitudinal side 12.1 in one piece with a resilient latching element 20 made, which is like a finger in the longitudinal direction of the wiper blade 1 extends and in which also the groove 14 continues. Inside the groove 14 is on the locking element 20 a lead 21 provided as a catch for locking the adapter 12 on the hook 15 in an opening 22 in the region of the free end of the hook portion 16 intervenes.

Connecting the wiper blade 6 with the wiper arm 1 done so that the adapter 12 from the joint piece 3 facing open side of the hook 15 is pushed onto this, in such a way that the hook portions 16 . 17 and 18 in the groove 14 are suitably received and the projection 21 in the opening 22 locks. The release of the wiper blade 16 takes place in that the locking element 20 manually on an actuating surface provided for this purpose 20.1 is pushed inwards, so that after releasing the locking connection, the wiper blade 6 with the adapter 12 from the open side of the hook 15 can be pushed out.

How the particular 1 and 3 show is the wiper arm element 4 at the section 19 continue to be shaped so that it is between this section 19 and the joint piece 3 in plan view of the wiper arm 1 laterally from the wiper blade 6 is arranged, namely in the in 1 - 7 illustrated embodiment such that the wiper arm element 4 each time when switching on the windscreen wiper system, ie when swiveling the wiper arm 1 from the parking position the wiper blade 6 is ahead.

The advantage of the wiper arm 1 and the wiper blade 6 formed wiper arm / wiper blade assembly consists inter alia in a particularly flat design, on the one hand by the formation of the wiper blade 6 as a flat wiper blade and in particular also results in that the plane of the hook 15 transverse to the wiper blade plane EW Due to the low height is achieved that the vehicle-mounted wiper arm also on his hook 15 trained end has only a small distance from the vehicle window.

Another advantage is the particularly stable and play-free connection between the wiper arm 1 and the adapter 12 ,

The 9 and 10 show as a further embodiment a wiper arm 1a together with one on this wiper arm via the fastening device 5a attached wiper blade 6a , This embodiment differs from the embodiment form of the 1 - 7 only in that the wiper arm element 4 forming rod-shaped material for forming the hook 15 is bent in the opposite direction, so that at the 1 corresponding representation of 8th the wiper arm element 4 below the wiper blade 6 is arranged, ie when swiveling from the parking position, the wiper blade 6a the wiper arm element 4 is ahead. The training of the hook 15 Accordingly, in this embodiment, the adapter 12 of the wiper blade 6a relative to a plane parallel to the wiping blade plane EW mirrored executed.

The 11 - 13 show as a further embodiment a wiper arm 1b together with one on the fastening device 5b releasably secured wiper blade 6b , This embodiment differs from the embodiments of FIG 1 - 10 only by another way of securing the wiper blade 6b on the hook 15 the wiper arm 1b , The wiper blade 6b in turn owns the holder 11 corresponding holder 11b and the adapter hinged to this holder 12b who is at the wiper arm 1b mounted wiper blade 6b positive fit from the hook 15 is encompassed.

To secure the connection between the adapter 12b and this form-fitting embracing hook 15 is the holder 11b with a lead 23 provided, which over the wiper lip 8th facing away from the top of the holder 11b protrudes. The lead 23 forms with mounted wiper arm 1b and when wiper blade against the vehicle window 6b a stop for the hook portion 18 such that the hook portion 18 between the projection 23 and the adapter 12b taken and thereby a the connection between wiper blade 6b and wiper arm 1b releasing relative movement between the adapter 12b and the hook 15 is prevented.

For the assembly and disassembly of the wiper blade 6b on or from the wiper blade 1b becomes the wiper arm element 4 around that between the bearing piece 2 and the joint piece 3 formed Wischarmgelenk folded into a service position of the vehicle window. In this position can then according to the 13 the adapter 12b as far as the holder 11b be pivoted or twisted that the projection 23 outside the effective range of the hook 15 is located and thus postponing the adapter 12 on the hook 15 or pushing out the adapter 12 out of the hook 15 is possible. The pivoting of the adapter 12b opposite the holder 11b takes place around the pivot axis 13.1 ,

In 14 schematically a wiper system for a windshield FS of a motor vehicle is shown. For driving the two wiper arms 1 . 1a . 1b an electromotive drive device is provided on the rotating output shaft 25 rotatably attached a crank. As transmission rods trained gear members 26 are each with one end to the crank of the drive device and with the other end to a trained as a pivot lever gear member 27 articulated, each with a transmission link 27 rotatably mounted on a rotatably mounted wiper shaft 28 is attached. At the two wiper shafts 28 is each a wiper arm 1 . 1a . 1b fixed in rotation, at the free end by means of a fastening device 5 . 5a . 5b a wiper blade 6 . 6a . 6b is appropriate. The fastening devices shown schematically here 5 . 5a . 5b as well as wiper arms 1 . 1a . 1b and also the wiper blades 6 . 6a . 6b are formed according to the invention and correspond to the designs described in the preceding embodiments.

To operate the wiper system, the electromotive drive device is set in operation for the required period of time. The revolving rotary motion of the output shaft 25 and thus the crank attached to it gets over the transmission links 26 and 27 in an oscillating rotational movement of the two wiper shafts 28 transferred. This will cause the wiper arms 1 . 1a . 1b attached wiper blades 6 . 6a . 6b oscillating within the wiping field on the vehicle to be wiped FS moves. The wiper system itself is in the range of including the drive device 24 up to and including the wiper shafts 28 trained and designed in previously known manner.

The The invention has been described above with reference to exemplary embodiments. It is understood that numerous changes and modifications are possible, without thereby the inventive idea underlying the invention will leave.

For example, it is possible for the wiper arm element 4 to improve the high speed behavior so that between the hook 15 and the joint piece 3 the larger cross-sectional side of the rectangular cross-section with the vehicle window or with the axial direction of the pivoting movement of the wiper arm 1 . 1a respectively. 1b includes an acute angle, so that the vehicle window remote from the top of the wiper arm 4 spoiler-like effect. This in turn can be achieved by simply turning the wiper arm element 4 forming rod-shaped material along the entire length between the hook 15 and the joint piece 3 or be realized on a partial length thereof.

1, 1a, 1b

wiper arm

2

Bearing piece for attachment on a wiper shaft

3

joint piece

4

wiper arm element

5, 5a, 5b

fastening device

6 6a, 6b

wiper blade

7

squeegee

8th

wiper lip

9

spring rail

10

Graduation- and connector

11 11b

holder

12 12b

adapter

12.1

long side of the adapter

12.2

rounded Narrow side of the adapter

13

hinge pins

13.1

swivel axis

14

groove

15

hook

16 17, 18

hook section

19

Part of the wiper arm 4

20

Rest on the adapter 12

20.1

actuating surface

21

Tab / Rest

22

opening

23

head Start

24

(Electromotive) driving device

25

output shaft

26 27

transmission member

28

wiper shaft

EW

Wiper blade level

EH

hook plane

FS

vehicle window

Claims (21)

Fastening device for the detachable connection of a wiper lip ( 8th ) having wiper blade ( 6 . 6a . 6b ) with a wiper arm ( 1 . 1a . 1b ) a wiper system for a vehicle window (FS), with a wiper arm ( 1 . 1a . 1b ) provided hooks ( 15 ) whose hook sections ( 16 . 17 . 18 ) define a hook plane (EH), and with an adapter ( 12 . 12b ), on the wiper blade ( 6 . 6a . 6b ) and with the hook ( 15 ) is positively and releasably connectable, wherein the wiper lip ( 8th ) in the unloaded state of the wiper blade ( 6 . 6a . 6b ) defines a wiper blade plane (EW) enclosing the longitudinal extension of the wiper blade, characterized in that when at the wiper arm ( 1 . 1a . 1b ) mounted wiper blade ( 6 . 6a . 6b ) the hook plane (EH) extends transversely to the wiper blade plane (EW). Fastening device according to claim 1, characterized in that the adapter ( 12 . 12b ) detachable with the wiper blade ( 6 . 6a . 6b ) connected is. Fastening device according to claim 1 or 2, characterized in that the hook plane (EH) in against the vehicle window (FS) fitting wiper blade ( 6 . 6a . 6b ) runs neglecting a possible curvature of the vehicle window (FS) parallel to the vehicle window (FS). Fastening device according to one of the preceding claims, characterized in that the adapter ( 12 . 12b ) pivotally with the wiper blade or one on the wiper blade ( 6 . 6a . 6b ) fastened holder ( 11 . 11b ) connected is. Fastening device according to claim 4, characterized in that a pivot axis ( 13.1 ) between the adapter ( 12 . 12b ) and the holder ( 11 . 11b ) runs transversely to the wiper blade plane (EW). Fastening device according to one of the preceding claims, characterized in that the adapter ( 12 . 12b ) is formed by a shaped body, which on its outer surface for positive reception of the hook ( 15 ) or from the hooks ( 15 ) forming hook sections ( 16 . 17 . 18 ) is trained. Fastening device according to one of the preceding claims, characterized in that the adapter ( 12 . 12b ) on one of the hooks ( 15 ) at least partially engaged with a hook ( 15 ) or the hook sections ( 16 . 17 . 18 ) receiving groove ( 14 ) is trained. Fastening device according to one of the preceding claims, characterized by means for securing the positive connection between the adapter ( 12 . 12b ) and the hook ( 15 ). Fastening device according to claim 8, characterized in that the means for securing the positive connection of at least one resilient latching element ( 20 ) or at least one resilient catch ( 21 ) and a counter-detent ( 22 ) are formed. Fastening device according to claim 9, characterized in that the latching element ( 20 ) or the resilient catch ( 21 ) on the adapter ( 12 ) and, for example, from an opening ( 22 ), counter-latching on the hook ( 15 ) are provided. Fastening device according to claim 9 or 10, characterized in that the latching element ( 20 ) of a resilient portion of the adapter ( 12 ) with at least one catch ( 21 ) is formed. Fastening device according to claim 11, characterized in that the hook ( 15 ) or a hook portion positively in the locking element ( 20 ) is recorded. Fastening device according to claim 12, characterized in that the groove ( 14 ) for receiving the hook ( 15 ) also in the locking element ( 20 ) is trained. Fastening device according to one of the preceding claims, characterized in that the means for securing the positive connection are formed by the hook ( 15 ) with mounted wiper blade ( 6b ) with at least one hook section ( 18 ) in at least one securing area between the adapter ( 12b ) and one on the holder ( 11b ) stop ( 23 ) is arranged. Fastening device according to claim 14, characterized in that when temporarily relative to the adapter ( 12 ) swiveled wiper blade ( 6b ) the hook ( 15 ) is movable out of the at least one securing area or into it. Fastening device according to claim 14 or 15, characterized in that the at least one stop of at least one projection ( 23 ) is formed. Fastening device according to one of the preceding claims, characterized in that the wiper blade ( 6 . 6a . 6b ) a flat wiper blade with a wiper lip ( 8th ) having wiper rubber ( 7 ) and with at least one spring rail ( 9 ), and that the holder ( 11 . 11b ) on the at least one spring rail ( 9 ) is attached. Fastening device according to one of the preceding claims, characterized in that the hook ( 15 ) at one end of a rod-like wiper arm element ( 4 ) is formed, which at its other end to a joint piece ( 3 ), which in turn is pivotally mounted with a bearing piece ( 2 ) connected is. Fastening device according to claim 18, characterized in that the wiper arm element ( 4 ) has a rectangular or substantially rectangular cross section, and that in the region of the hook ( 15 ) the larger cross-sectional dimension is oriented perpendicular to the hook plane (EH). Wiper arm / wiper blade arrangement with a wiper arm to be fastened to a drivable wiper shaft ( 1 . 1a . 1b ) and with a by means of a fastening device ( 5 . 5a . 5b ) releasably attached to the wiper arm wiper blade ( 6 . 6a . 6b ), characterized in that the fastening device ( 5 . 5a . 5b ) is formed according to one of claims 1-19. Wiper system for a vehicle window, in particular for a vehicle front window, with at least one wiper arm ( 1 . 1a . 1b ), which is connected to a wiper shaft ( 28 ), which, if necessary via intermediate transmission elements ( 26 . 27 ) of a, for example, electromotive, drive device ( 24 ) is drivable, and with at least one on the wiper arm ( 1 . 1a . 1b ) by means of a fastening device ( 5 . 5a . 5b ) releasably attached wiper blade ( 6 . 6a . 6b ), characterized in that the fastening device ( 5 . 5a . 5b ) is formed according to one of claims 1-19.