DE102006061802A1 - Lever arrangement for a windscreen wiper system on a vehicle comprises a flat wiper blade directly held on wiper arms in the region of the ends of the wiper blades - Google Patents

Abstract

Lever arrangement (1) comprises a flat wiper blade (3) directly held on wiper arms (13, 14) in the region of the ends of the wiper blades. Preferred Features: The wiper arms have different lengths. The wiper blade moves on one of the wiper arms in the longitudinal direction of the blade. The wiper blade is hinged on the wiper arms. The wiper blade has a wiper blade body or wiper rubber holder (4) extending over the whole length of the wiper blade.

Description

The The invention relates to a wiper lever assembly according to the preamble Claim 1.

"Wischhebelanordnungen" are within the meaning of the invention In general arrangements consisting essentially of wiper levers with wiper blades, wherein the wiper lever in turn essentially formed by wiper arms are over Wischarmgelenke bearing elements or bearing pieces are hinged, which for connecting the respective wiper lever with a wiper drive serve, for example, for connection to a driven by the wiper drive Wiper shaft.

Known is, inter alia, intended for vehicle windows wiper lever assembly ( US 2,890,472 ), in which at a common, fastened to a wiper shaft bearing element, two wiper arms are each articulated via a Wischarmgelenk. The wiper arms are designed over the greater part of their length as rods made of a flat material and connected via an additional bracket with the wiper blade. A disadvantage is, inter alia, that results in looking in the direction of the vehicle window superimposed wiper arms alone by the bracket used a relatively large height for this known wiper lever arrangement.

Also known is a wiper lever assembly ( US 2,250,331 ), are attached to a fixed to a wiper shaft bearing element via a common Wischarmgelenk two each formed by a spring rail wiper arms, each of which wiper arm is attached to the wiper blade in the region of a wiper blade end. The wiper blade is rigid. This known wiper lever arrangement is therefore at most suitable for plane, but by no means suitable for curved vehicle windows.

Known are u.a. also wiper lever assemblies with flat wiper blades, i. with wiper blades, the without hanger over one corresponding adapter are attached directly to the wiper arm, so that for the wiper lever arrangement, i. the combination wiper lever and wiper blade a low design results.

adversely is in known flat wiper blades but that they each over a single joint between its wiper blade ends the associated Wiper arm are held and over This junction also the contact pressure in the relevant Wiper blade must be initiated. This often requires a deficient Wiper blade guide u.a. with a disturbing noise (Chattering) during the wiping operation and with an unsatisfactory wiping quality at higher speeds.

task The invention is to show a wiper lever assembly, the at reduced height and improved wiping behavior for non-planar or curved vehicle windows suitable is. To the solution This object is a wiper lever assembly according to the claim 1 formed.

at the wiper lever assembly according to the invention the at least one wiper blade is a flat wiper blade which at its wiper blade ends or in the immediate area of these ends directly, i. without the use of ironing at the end of each one the two wiper arms is attached. The attachment is preferred so executed, the wiper blade is fixed at one end in the wiper blade longitudinal direction, i. Not movably held on the respective wiper arm, at the other wiper blade end but in Wischblattlängsrichtung movably guided on the respective wiper arm, so that for the elastic Deformation of the wiper blade necessary length compensation of the between the attachments extending wiper blade length is possible.

Also in the area of the longitudinal direction movable wiper blade end is the attachment or connection between the wiper arm and the wiper blade as close as possible to the wiper blade end and is only far enough from this end that at the maximum potential Deformation or curvature of the wiper blade the connection between wiper blade and wiper arm reliable preserved.

at a preferred embodiment is at least the longer one Wiper arm so executed, that he has the shorter one Wiper arm and / or the at least one wiper blade completely or almost completely covered, i.e. the shorter one Wiper arm and / or the wiper blade in the direction of the vehicle window open three-dimensional cross-sectional profile or 3D cross-sectional profile the longer one Wiper arm complete or almost complete are included.

Under "three-dimensional Cross-sectional profile "or" 3D cross-sectional profile "is in the sense of Invention to understand a cross-sectional profile, the wall of a limited to the vehicle window open space, such as a U-profile or C-profile.

The Wiper lever assembly according to the invention is characterized by a low design and by an optimal Distribution of the contact pressure along the flat wiper blade, which leads to a significant improvement in wiping quality. Farther is a noise, especially rattling of the flat wiper blade avoided. The wiper lever assembly according to the invention can continue also with a pleasing external appearance realize.

The Invention will be described below with reference to the figures of an embodiment explained in more detail. It demonstrate:

1 in a schematic representation and partially in longitudinal section a wiper lever of a windshield wiper device for vehicle windows, together with a voltage applied to a curved portion of a vehicle window wiper blade;

2 a section corresponding to the line AB of 1 ;

3 a section corresponding to the line CD the 1 ;

4 and 5 in each case sections through the wiper blade and the wiper arm connected to the wiper blade in the region of a wiper blade end;

6 a section corresponding to the line EF of 4 ;

7 and 8th in an enlarged view and in plan view or in section the joint carrier of the wiper lever, together with the wiper arms articulated via wiper arm joints.

In the figures are 1 a wiper lever of a windscreen wiper system for vehicles, for example for vehicle front windows 2 , and 3 one on the wiper lever 1 provided wiper blade, which is designed as a flat wiper blade. The 1 shows the wiper blade 3 in a strongly arched against a curved area of the vehicle window 2 attached condition.

The wiper blade 3 consists essentially of one of a profile of an elastic material, for example made of plastic and extending over the entire wiper blade length strip-like wiper blade body or wiper rubber holder 4 , made of a flat of this holder and made of a resilient metal, such as spring steel spring rail 5 and one in the squeegee holder 4 held squeegee 6 made of a rubber-elastic material, for example of an elastomeric plastic. The squeegee 6 , which as well as the squeegee holder 4 and the spring rail 5 extends over the entire or nearly the entire wiper blade length is in the usual way as a profile with the wiper lip 7 formed, at least during the wiping operation against the vehicle window 2 is applied. The squeegee holder 4 is at the wiper lip in the illustrated embodiment 7 facing away from the top with two on each one wiper blade longitudinal side wegstehende flange-like sections 4.1 educated. Furthermore, the squeegee holder has two recesses 4.2 and 4.3 on, of which the recess 4.2 for receiving the spring rail 5 and those to the bottom of the squeegee holder 4 open recess 4.3 for positive and non-positive reception of the wiper blade rubber 6 serve. With M is the median plane of the wiper blade 3 designated to which the wiper blade 3 is formed mirror-symmetrically.

The wiper lever 1 consists inter alia of a bearing element 8th which is made in the illustrated embodiment as a molded part of a suitable material, for example of metal or plastic and with which the wiper lever 1 on the in the 1 indicated by broken lines wiper shaft 9 attached, which is part of the wiper drive of the windshield wiper system and on the wiper lever 1 is pivotally driven during the wiping operation.

For attachment to the wiper shaft 9 has the bearing element 8th an opening 10 on. Opposite the axis of the opening 10 radially offset, are on the bearing element 8th two wiper arm joints 11 and 12 formed, in turn, based on the axis of the opening 10 radially offset against einender so that the wiper arm joint 11 the opening 10 closer than the wiper arm joint 12 ,

The wiper lever 1 also includes two wiper arms 13 and 14 of which the wiper arm 13 over the wiper arm joint 11 and the wiper arm 14 over the wiper arm joint 12 hinged to the bearing element 9 are connected, in such a way that the two wiper arms 13 and 14 together with the wiper blade held on this wiper arm 3 eg to replace this wiper blade of the vehicle window 2 are pivotable away in a service position. Furthermore, the two wiper arms 13 and 14 over the wiper arm joints 11 and 12 so articulated with the bearing element 8th connected, that in particular even with curved vehicle windows 2 that at the wiper arms 13 and 14 held wiper blade 3 or the wiper lip 7 when sweeping the wiping field constantly with the required contact pressure against the vehicle window 2 is applied.

In the area of the wiper arm joints 11 and 12 are the wiper arms 13 and 14 each as to the vehicle window 2 executed open U-profile, namely the wiper arm 13 with two thighs 13.1 and a yoke portion connecting these legs 13.2 and the wiper arm 14 with two thighs 14.1 and a yoke portion connecting these legs 14.2 , The wiper arm 14 has in the illustrated embodiment over its entire length a smaller width than the wiper arm 13 on, ie the distance, the legs 14.1 each other is over the entire length of the wiper arm 14 smaller than the distance of the thighs 13.1 ,

The wiper arm joint 11 is formed by the wiper arm 13 with his thighs 13.1 a storage section 8.1 of the bearing element 8th overlaps and in those thighs 13.1 at both ends a hinge pin 15 is attached, the one with a bearing bush 16 provided bearing opening in the section 18.1 be upheld.

The wiper arm joint 12 is formed in an analogous manner characterized in that the wiper arm 14 with his two thighs 14.1 a storage section 8.2 of the bearing element 8th overlaps and in those thighs 14.1 at both ends a hinge pin 17 is attached, the one with a bearing bush 18 provided bearing opening in the section 18.2 be upheld. The two hinge pins 15 and 17 whose axes are the pivot axes of the wiper arm joints 11 and 12 are arranged parallel to each other and with respect to the axis of the opening 10 against each other both radially to this axis, as well as offset in the direction of this axis against each other, so that when mounted wiper lever 1 the axis of the hinge pin 17 and thus the pivot axis of the wiper arm joint 12 the vehicle window 2 closer than the axis of the hinge pin 15 or the wiper arm joint 11 ,

According to the narrower design of the wiper arm 14 is also the storage section 8.2 narrower formed as the bearing section 8.1 , Furthermore, the storage section closes 8.2 to the opening 10 opposite side of the bearing section 8.1 such that the parallel to the thighs 14.1 extending median plane of the wiper arm 14 opposite the parallel to the thighs 13.1 the wiper arm 13 extending median plane is slightly offset and thus the distance between the legs 13.1 and 14.1 on the one longitudinal side of the wiper arm 14 smaller than on the other long side of this wiper arm, as in the 8th is shown. The wiper arm 14 is still in the illustrated embodiment over its entire length between the legs 13.1 the wiper arm 13 taken up and at least largely covered by this wiper arm.

How the particular 2 - 5 show, show the wiper arms 13 and 14 a profile that changes along these elements, ie in the 1 with G given direction starting from the wiper arm joint 11 to the free end 13 ' the wiper arm 13 The profile of this wiper arm changes in such a way that in the area of the wiper arm joint 11 initially U-shaped profile in a spoiler-like profile ( 2 and 3 ) and this spoiler-like profile then in the area of the free end 13 ' the wiper arm 13 merges into a C-profile, ie in a very shallow U-profile with directed towards the profile center webs or bends 13.3 on the thighs 13.1 ( 4 ).

Similarly, the profile of the wiper arm also changes 14 , ie, in the viewing direction indicated by the arrow G, this profile changes, starting from a U-profile in one to the spoiler shape of the wiper arm 13 adapted profile shape ( 3 ), which then at the free end 14 ' the wiper arm 14 in the flat C-profile, ie in the U-profile with directed toward the profile center webs or bends 14.3 on the thighs 14.1 passes ( 5 ). The wiper arms 13 and 14 are shaped so that they are at their free ends 13 ' and 14 ' each have the same C-profile in terms of shape and size.

As the 1 shows has the wiper arm 13 a much longer length than the wiper arm 14 , Between the ends 13 ' and 14 ' the wiper arms 13 and 14 is the wiper blade 14 held in the region of its two wiper blade ends, in the illustrated embodiment such that the wiper blade 3 in plan view of the wiper lever 1 below the wiper arm 13 is at least partially covered by this.

For fastening the wiper blade 3 at the free end 13 ' serves a two-part holder in the illustrated embodiment 19 , the parts or parts of which are made as moldings of a suitable material, for example of plastic. The holder 19 is in the C-profile at the free end 13 ' used, ie completely or almost completely in the wiper arm 13 recorded, and at the same time forms a visually appealing conclusion to the end 13 ' , In detail, there is the holder 19 from a storage item 20 , which in the C-profile of the wiper arm 13 is anchored in a suitable manner, for example by locking, as well as a guide shoe 21 in the warehouse 20 about an axis perpendicular to the longitudinal extent of the wiper blade 3 as well as perpendicular to the median plane M of the wiper blade 3 is pivotally mounted. The bearing piece 20 has for this purpose on an example plate-shaped portion an opening for receiving the guide shoe 21 on, which in the area of this opening with integrally formed pivot pin 21.1 in bearing openings of the bearing piece 20 intervenes. The guide shoe 21 is essentially formed as a C-profile, with an opening 22 leading to the bottom of the wiper arm 13 is open and in which the squeegee holder 4 with the two sections 4.1 is recorded positively. By fixing the is the squeegee holder 4 thus on its upper side like a rider cross-over guide shoe 21 also against axial displacement in wiper blade longitudinal direction on the wiper blade 3 secured. These fixing means are in the illustrated embodiment of locking lugs 23 formed in the opening 22 are provided and each in a recess 24 on the edge of a section 4.1 intervene, as in the 6 is shown. With the holder 19 is thus the one end of the wiper blade 3 at the free end 13 ' the wiper arm 13 Although around the common axis of the hinge pins or journals 21.1 swiveling, held in wiper blade longitudinal direction but not displaceable.

In the area of his other, the bearing element 8th Closer end is the wiper blade 3 at the free end 14 ' the wiper arm 14 also via a holder 19 held, in this case so that the wiper blade 3 not just about the common axis of the hinge pins 21.1 is pivotable, but at the same time in the guide shoe 21 is displaceable in the wiper blade longitudinal direction, so as to length differences due to differences in the curvature of the wiper blade 3 To be able to compensate, the (differences), for example, when sweeping the wiping field of the curved vehicle window 2 and / or while relaxing the wiper blade 3 result, for example, when the wiper arms 13 and 14 folded into a service position. Also the connection of the wiper blade 3 with the wiper arms 13 and 14 effecting holder 19 are at least largely not visible in these wiper arms recorded.

To wipe the vehicle window 2 required contact force of the wiper blade 3 over the wiper arms 13 and 14 Achieve are in the field of wiper arm joints 11 and 12 Provided spring elements, in the illustrated embodiment in the form of tension springs 25 and 26 of which the tension spring 25 between the bearing element 8th and the wiper arm element 13 and the tension spring 26 between the bearing element 8th and the wiper arm element 14 acts. The points of attack of the tension springs 25 and 26 on the bearing element 8th and the wiper arms 13 and 14 are chosen so that both springs each one the wiper blade 3 against the vehicle window 2 produce pressing moment, wherein to achieve the greatest possible contact force of the wiper blade 3 on both ends of the wiper blade via the tension spring 25 exerted moment is greater than that via the tension spring 26 exercised moment.

The tension spring 25 is at least over the greater part of its length within the U-profile of the wiper arm 13 taken in a room between a thigh 13.1 and a longitudinal side of the wiper arm 14 by the laterally offset arrangement of the wiper arms 13 and 14 is formed. The tension spring 26 is in the U-profile of the wiper arm 14 picked up and with one end at one between the thighs 14.1 extending bolt 27 and at the other end on a hanger 28 held in turn on one of the bearing elements 8th provided bolt 29 is mounted. The tension spring 25 is similar to the tension spring 26 at one end on the wiper arm element 13 mounted and at the other end on a bracket on the bearing element 8th or at a local bolt 30 ,

To manually swing away or fold away the wiper arm 13 from the vehicle window 2 in the service position the wiper arm 14 to take along or at the Wischarmgelenk 12 also to fold, is one of the two thighs 13.1 the wiper arm 13 also in that between the wiper arm joint 12 and the free end 14 ' extending portion of the wiper arm 13 with the bend footbridge 13.3 provided, which then when folding away the wiper arm 13 in the service position against a thigh 14.1 the wiper arm 14 comes to rest and thereby the wiper arm 14 with swiveling around his wiper arm joint 12 carries.

As the 2 shows is in the illustrated embodiment, an additional support and leadership 31 of the wiper blade 3 on the wiper arm 13 intended. This support and leadership 31 , which is located approximately in the middle between the two wiper blade ends, is formed by one on the wiper blade 3 or on the wiper rubber holder 4 fixed guide or support profile 32 against the inside of the wiper arm 13 is applied. This is the leadership or support profile 32 adapted in its shape to the profile shape (spoiler profile), the wiper arm 13 at this area. The support and leadership 31 Although causes a support of the wiper blade 3 in axial directions perpendicular to the vehicle window 2 as well as in the direction of the pivoting movement of the wiper blade 3 during wiping operation, but allows a relative movement between the wiper blade 3 and the wiper arm element 13 in wiper blade longitudinal direction for the length compensation with different curvature of the wiper blade 3 ,

To replace the wiper blade 3 to allow at least the holder 19 at the end 13 ' by locking again detachable on Wischarmelement 13 held so that the respective wiper blade 3 along with this holder 19 can be exchanged. In principle, however, there is also the possibility, for example, of locking 23 to perform so that at the wiper arm 13 remaining holder 19 the wiper blade 2 can be removed from this holder, overcoming a sufficient for the wiper operation holding power.

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

1

wiper lever

2

vehicle window

3

wiper blade

4

Wiper blade body or Squeegee holder

5

spring rail

6

squeegee

7

wiper lip

8th

bearing element

8.1 8.2

bearing portions

9

wiper shaft

10

Opening for wiper shaft

11 12

Wischarmgelenk

13 14

wiper arm element

13.1, 14.1

leg

13.2, 14.2

yoke

13.3, 14.3

angling or footbridge

13 ', 14'

free end of the wiper arm 13 respectively. 14

15

hinge pins

16

bearing bush

17

hinge pins

18

bearing bush

19

holder

20

stock items

21

guide element

21.1

Joint- or journal

22

recess

23

rest

24

recess

25 26

mainspring

27

bolt

28

hanger

29 30

bolt

31

Support or guide

32

Support or guide profile

FROM

intersection

CD

intersection

E-F

intersection

G

viewing direction

M

midplane of the wiper blade

Claims (22)

Wiper lever arrangement for windscreen wiper systems of vehicles, with a wiper lever ( 1 ) with at least two wiper arms ( 13 . 14 ) which articulates on a connectable with a windshield wiper drive bearing element ( 8th ) of the wiper lever ( 1 ) are provided, as well as with at least one flexible on the wiper arms ( 13 . 14 ) wiper blade ( 3 ), characterized in that the at least one wiper blade ( 3 ) is a flat wiper blade, which in the region of its wiper blade ends directly on the wiper arms ( 13 . 14 ) is held. Wiper lever arrangement according to claim 1, characterized in that the wiper arms ( 13 . 14 ) have different lengths, and that the wiper blade ( 3 ) with its entire length or substantially its entire length between the ends ( 13 ' . 14 ' ) of the wiper arms ( 13 . 14 ). Wiper lever arrangement according to claim 1 or 2, characterized in that the wiper blade ( 3 ) on one of the wiper arms ( 13 . 14 ) is movably provided in a wiper blade longitudinal direction. Wiper lever arrangement according to one of the preceding claims, characterized in that the wiper blade ( 3 ) on one of the wiper arms ( 13 . 14 ) is not provided movably in a wiper blade longitudinal direction. Wiper lever arrangement according to claim 3 or 4, characterized in that the at least one wiper blade ( 3 ) on the wiper arm ( 14 ) shorter length is provided movably in the wiper blade longitudinal direction. Wiper lever arrangement according to one of the preceding claims, characterized in that the wiper blade ( 3 ) hinged with the wiper arms ( 13 . 14 ) connected is. Wiper lever arrangement according to one of the preceding claims, characterized in that the at least one wiper blade ( 3 ) a flat wiper blade with at least one deformable spring and / or support element extending in the wiper blade longitudinal direction ( 4 . 5 ). Wiper lever arrangement according to claim 7, characterized in that the spring and / or support element of at least one spring rail ( 5 ) is formed from a resilient flat material, such as spring steel. Wiper lever arrangement according to one of the preceding claims, characterized in that the wiper blade ( 3 ) a squeegee ( 6 ) and extending over the entire or substantially over the entire wiper blade length wiper blade body or wiper rubber holder ( 4 ) having. Wiper lever arrangement according to one of the preceding claims, characterized in that the wiper arm ( 13 ) with the greater length the wiper arm ( 14 ) with the shorter length and / or the wiper blade ( 3 ) completely or almost completely covers. Wiper lever arrangement according to one of the preceding claims, characterized in that at least one wiper arm ( 13 . 14 ), preferably the wiper arm ( 13 ) with a greater length at least a partial length has an open to a bottom of the wiper lever assembly 3D cross-sectional profile, for example, a C-shaped or U-shaped cross-sectional profile. Wiper lever arrangement according to claim 11, characterized in that at least one wiper arm ( 13 . 14 ), preferably the wiper arm ( 14 ) with the shorter length at least partially in the cross-sectional profile of the other wiper arm, preferably in the cross-sectional profile of the wiper arm ( 13 ) of the greater length. Wiper lever arrangement according to one of the preceding claims, characterized in that the wiper arms ( 13 . 14 ) in the area of their wiper arm joint ( 11 . 12 ) each with two a bearing section ( 8.1 . 8.2 ) of the bearing element ( 8th ) overlapping legs ( 13.1 . 14.1 ) are formed. Wiper lever arrangement according to one of the preceding claims, characterized in that the wiper arms ( 13 . 14 ) in the area of their ends ( 13 ' . 14 ' ) each have the same or substantially the same cross-sectional profile. Wiper lever arrangement according to one of the preceding claims, characterized in that the wiper blade ( 3 ) on the wiper arms ( 13 . 14 ) via at least one holder ( 19 ), which is at least partially in the cross-sectional profile of the respective wiper arm ( 13 . 14 ) is recorded. Wiper lever arrangement according to one of the preceding claims, characterized in that the wiper blade ( 3 ) on the wiper arms ( 13 . 14 ) via at least one holder ( 19 ), and that the respective holder ( 19 ) at least in two parts from one on Wischarmelement ( 13 . 14 ) or at least partially in this recorded bearing piece ( 20 ) as well as from one on the bearing piece ( 20 ) pivotally held guide piece ( 21 ) for the wiper blade ( 3 ) consists. Wiper lever arrangement according to claim 16, characterized in that the wiper blade ( 3 ) on a wiper arm ( 14 ) on the guide piece ( 21 ) in the wiper blade longitudinal direction and on the other wiper arm ( 13 ) on the guide piece ( 21 ) is not provided movably in wiper blade longitudinal direction. Wiper lever arrangement according to claim 17, characterized in that the respective guide piece ( 21 ) the wiper blade ( 3 ) or the squeegee holder ( 4 ) like a rider. Wiper lever arrangement according to one of the preceding claims, characterized by means ( 13.3 ), about the pivoting or folding of a wiper arm ( 13 ) about the axis of its wiper arm joint ( 11 ) the other wiper arm ( 14 ) is carried. Wiper lever arrangement according to claim 19, characterized in that the means for entrainment of a driver on the one wiper arm ( 13 ), for example in the form of a web, a tab or a bend are formed. Wiper lever arrangement according to one of the preceding claims, characterized by an additional support and / or guide ( 31 ) for the at least one wiper blade ( 3 ) between its two wiper blade ends on a wiper arm ( 13 ). Wiper lever arrangement according to one of the preceding claims, characterized in that each wiper arm joint ( 11 . 12 ) each having at least one spring element, for example in the form of at least one tension or compression spring ( 25 . 26 ).