DE7042980U - CONNECTING DEVICE FOR FASTENING A WIPER TO A DRIVE ARM - Google Patents

Description

4 «β Herne, *. . *: Ζ \, ' _Μ · · »NM Matching 75,

FrelllgralhitreBe 1 » " ^ S with I *. » JL * B * * IS »B- * !. ΕίβηβΛβΓSbaSa 17 P.O. Box 540 ϊ * IPI · ■ 1 !! ■ g. "X. Hj B aiii r & LAsa. triflmt

^ Anw.Hn »» »^.«. ^ ·! - DlpL-Phys. Eduard Betiier F ^ rupre * ^ ₉ » _n

Telephone: S1013 ^r * 3 »S012 ^S1D "DIpl.-Ing. W, Hemnann-Trentepohl ^ ⁸⁰⁵³ Telegram address: n »Tr» .i-r »fc» w> fiTE Töegsajnmanicicjfi Bahrpaienle Heine PATtNTANWALTt Babetzpal ÜIünAcn

^ slex OS 229 853 Telex SS245 42

Γ ' -i

j Veielnjbank MQncben

Disrdner 3eni AG Herne 2C2-C4 Poslschecüonto ItortmuDd 553 * 5

L _J

Specify spout in you answer

Zaicarift bUte nodi

Munich

KAELSCHLOSS ANSTALT
Vaduz / Liechtenstein

Connection device for fastening
of a windshield wiper on a drive arm

The invention relates to a connecting device for attaching a windshield wiper to an associated drive poor.

The invention is particularly concerned with windshield wipers for motor vehicles, in which a reciprocating drive arm is connected at one end to a drive shaft and is in communication with a wiper at its free end. The wiper can swing freely relative to the drive unit, within limits. It consists essentially of a wiper blade on an elastically deformable material, which is carried by a flexible holder. The bracket is at least one Zv / ischenarm with the

11/11/71

Antrisbsarm in connection and is loaded by a spring to hold the wiper blade during the alternate back and forth movements of the drive arm on the windscreen.

Normally, the connection between the drive arm and the wiper is made via a molded holder which is connected to the holder for the wiper blade via - (■ ■ te 'perform oscillating movements relative to the drive arm.

. . ". .. '.. Such known compounds allow the production

of the wiper are both expensive and difficult to ground, since they require the use of an additional metal plate part which is a wiper blade holder and which must be attached to the drive arm. In addition, this holder extended lateral surfaces on which the s total aerodynamic drag of the wiper at high speeds larger.

The invention is directed, inter alia, to the

ν the disadvantages mentioned above due to a connecting device

for connecting the drive arm to a windshield wiper avoid, which is of simple, robust and economical construction and a safe connection between the wiper and the arm sucked. while in advantageously reduces the overall aerodynamic drag of the wiper.

Furthermore, after the Srfiiidiing, a connecting device of the type mentioned above should be created, the

7042S80ii, ii, 7i

a quick, easy and precise attachment of the wiper allowed on its drive arm and thereby oscillating movements of the wiper relative to the arm while she it also provides the option of removing the wiper from the arm in a simple manner for replacement purposes, if desired.

The connecting device according to the invention is characterized in that it is made of plastic and has a flat tongue which can be pushed into a longitudinally elongated opening in the middle of an intermediate arm of the windshield wiper and via a deforaable pivot pin with two opposing openings limiting side walls is pivotally connected that the connecting device has an enlarged portion which is provided with two parallel, closed at one end and open at the other end longitudinal grooves to slide into a fork-shaped end portion of the drive arm, the enlarged portion also one flexible, 5.ji longitudinally extending tongue carries, and the Arretierrnittel are provided on the drive arm and on the connecting device, which prevent unintentional detachment of the connecting device from the end section ues drive arm.

The Seheibenwiseher connection device after the Invention is of simple construction and leaves one particularly easy to attach and fix the sight of the sight.

An example of a design is shown in the accompanying drawing of the device shown after the binding. Show it:

704298011.11.71

1 is a schematic perspective view of a windshield wiper for a motor vehicle, the The windshield wiper is attached to the drive arm via a connecting device according to the invention;

FIG. 2 is an enlarged perspective view of the connecting device according to FIG. 1;

3 is an exploded perspective view of the connecting device;

4 shows a cross-section on an enlarged scale. . 'by the device along the line IV-IV of Fig.

Fig. 1 shows a windshield wiper 1 with a wiper blade 2 made of elastically deformable material, such as rubber, with a flexible holder ~ 5, which carries the wiper blade 2, with two end arms 4 and 4 ', which at opposite ends of the holder 3 and on Wiper blade 2 are attached and with an intermediate arm 5, which is pivotably connected with its opposite ends to central points of the two end arms 4 and 4 '. . The intermediate arm and the end arms are made of sheet metal which is bent into a U-shape in cross section.

The intermediate arm 5 carries a central opening 6, which is elongated in the longitudinal direction, between two straight parallel ones Side walls 5a., Which are made in one piece from the sheet metal of the arm 5 are formed and each carry round holes 7 lying on a common transverse axis.

The windshield wiper 1 is carried by an oscillating drive shaft 8, which has a

704298011.11.71

remaining part has slightly bent end portion 8a. The section 8a forms according to FIG. 3, a fork-shaped end with two parallel arms 9 * over a
central, longitudinally extending slot
Io are separated from each other. A round hole 11 sits
in the end section 8a., at a distance from the slot
lo, and penetrates the strip that forms the end section
8a trains.

a * 1

The wiper 1 is on the drive arm 8 via a ver!

binding device 12 attached according to the invention. The j connecting device 12 consists of a single j. .. · ■ ·. "Element that is molded from plastic material. It \ - carries a flat tongue 13 with rounded corners and with. J" a transverse round hole 14-, the tongue 13 can j

inserted between the two parallel side walls 5a! I ben, which the central opening 6 in the intermediate arm \

} - 5 limit. Via a pivot pin 15. which is inserted into the open \

] openings 7 and Ik engages, the tongue 13 is pivotable;

1 attached to the intermediate arm 5. The pivot pin 15 consists of \

} 'from a deformable shaft]

y y

j ■ The connecting device 12 has an enlarged 1

I ^] Section 15, corresponding to Figures 2 and 3 the |

j forms the lowest part. This section carries on against j

] overlying surfaces two parallel, lengthways j

1 grooves 17 which open at one end of the part 16 and]

are closed at the opposite end. The \

X section 15 can have a longitudinal sliding movement;

j gung engage in the fork-shaped end of the ar-nes 8,;

ί -wherein the arms 9 exactly in the respective longitudinal \

* IJuten 17 fit. At their enlarged section 16;

the connecting device 12 carries a flexible tongue
18, which look over the open ends of the two irons

704298011.11.71

17 extends out and ends in a laterally enlarged head 19. This head carries a locking screen in the form of a central projection 2o which projects in the same direction as the tongue Yy . The extension 2o can engage in a complementary locking member in the form of an opening 11 which is formed in the end section 8a of the arm 8. In this way, the "connecting device 12" is prevented from being inadvertently detached from the end section 8a.

The individual parts are assembled in such a way that the flat tongue 13 of the connecting device 12 is pushed into the opening 6 of the intermediate arm 5 provided on the windshield wiper. Then, the pivot pin 15 is inserted into the aligned openings 7 and 1h of the arm 5 and the tongue I ^. The end of the pin 15 opposite the head is upset or otherwise deformed in order to produce a permanent pivoting connection between the connecting device and the arm 5. The fork-shaped end of the drive arm S is then inserted into the enlarged section 16 of the connecting device 12, with the end arms 9 engaging in the grooves 17. The insertion movement is continued until the projection 2o snaps into engagement with the opening 11 of the arm 8.

After these operations have been carried out, the parts are securely hinged to one another and the wiper 1 can be limited Oscillation movements relative to your arm 8 by one Execute the transverse axis formed by the pivot pin I5.

In order to take the individual parts apart, it is sufficient to use the tongue 18 of the connecting device in this way

-O-

704298011.11.71

deflect. That sieve of the projection sets the öiföaög 12 loosens, in order to then pull the era 8 outwards so that its fork-shaped end slides out of the S-grooves TJ of the connecting device 12.

So it turns out that a honing and dismantling the egg acellar parts can be carried out easily, quickly and conveniently is without any special equipment needs, while the assembled parts on the other hand , are safely connected to each other during operation

'' In the described embodiment / the Yer-

'-' binding device 12 arranged so that the enlarged '· - - · r - - - section 16 in the Haura between the Zwischenana 5 ¹ Wa ^ ^er holder 5 for the wiper blade. In this way, the entire wiper arrangement protrudes only slightly outwards at its stated height, so that automatic washing of the motor vehicle provided with the juxtaposition of wipers is facilitated. In addition, the working conditions of the windshield wiper are improved as a result of the load exerted on the Zv? Xschenarm 5 by the fire effect of aes arm 8.

It should be noted that construction details special embodiments according to the invention in Can be modified within the scope of the invention.

Claims (2)

j claim a patent 1. Connection device for attaching a windshield wiper to its associated drive arm, thereby characterized in that the plastic Existing connecting device (12) has a flat tongue (Ip) which is elongated in a longitudinal direction Opening (6) in the middle of an intermediate arm (5) of the disk i O "benwischers insertable as well as a deformable one . . . 'Pivot pin (15) with two opposite one another, the opening (6) limiting. Side walls (5a.) Pivotally connectable __ _f is that the connecting device (12) has an enlarged portion (16) which is provided with two parallel, closed at one end and open at the other end longitudinal grooves (17) to slide to engage in a fork-shaped end section (8a) of the drive arm (8), the enlarged section (lo) also carrying a flexible, longitudinally extending tongue (l8), and that locking means on the drive arm (8) and on the connecting device (12) are provided, which a / "• j unintentional detachment of the connecting device (12) Prevent from the end portion (8a) of the drive macaw. 2. Apparatus according to claim 1, characterized in that g ek e η η, that the locking means from one on the flexible tongue of the device arranged projection and an opening in the drive arm suitable for receiving the projection. Π * Λ J Λ Λ Uil.11. ⁷¹