DE3490325T1 - Windshield wiper with wiper joint axis on the arm with cross locking - Google Patents

Description

Maxton · Maxton · Langmaack & Patent Attorneys

Patent attorneys Maxton & Langmaack - Plerdmengessli. SO ■ SOOO Cologne 51

Alfred Maxton sr. (1943-1978) Alfred Maxton Jürgen Langmaack

Equipements Automobiles Graduated Engineers (tuj

Marchai admitted at

European Patent Office F-92 132 Issy-les-Moulineaux

5000 Cologne 51

Our characters Date * Y λ rrn ■ »-,

559 pg 851 - ^J '·· ■' - "■ '

Designation:

Windshield wiper with wiper joint axis on the arm with cross locking
5

Description:

The invention relates to a windshield wiper, in particular for motor vehicles in which the wiper joint axis held in position on the wiper arm by a device that transversely locks the axle will.

A windshield wiper comprises, on the one hand, a wiper blade which has a holder on which a directly or indirectly Wiper blade, which is intended to rest on the windshield and consists of a stiffened elastomer profile, is attached, and on the other hand a wiper arm, which the wiper blade according to a back and carries with it reciprocation to ensure wiping of the windshield. The wiper blade is on the windshield

Telephone: (0221) 380238 · Telegram: Inventator® Cologne ■ Telex: 8883555 max d f 12 Postgirokonto-CCP Cologne (BLZ 37010050) account no. 152251-500 ■ Deutsche Bank AG Cologne (BLZ 370 70060) account no. 1236181

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Wiper arm articulated at its end in order to rest the wiper blade on the windshield in the course of the wiping movement to guarantee. For this purpose, the end of the arm carries a U-shaped joint cap that forms the central Area of the holder, which generally has two opposite sides, overlaps. The sides of the cap and those of the central area of the bracket are provided with openings for a passage of the hinge axis, which through a any suitable device is held in position.

The present invention brings simplification of the operations when installing the wiper blades on the wiper arm, as it suggests an assembly that takes place at the same time is easy and safe.

According to the invention, the hinge axis becomes simple after it in those in the sides of the cap carried by the wiper arm and in the sides of the central area the bracket provided openings is inserted into the translational movement through a previously in the through the sides of the central area of the bracket limited space inserted locking piece blocked where it is in Can slide lengthways to the bracket. This piece has a laterally open seat designed to accommodate the central zone of the joint axis, which has a weaker cross-section than the lateral cylindrical areas of the axis, which secure the swivel joint, has to take up. In the position in which the locking piece by sliding into a is placed in such a way that the central zone of the axle is located in the seat comprising this piece is, the axis is blocked in its translational movement by two side walls of the locking piece, wherein each of these walls is opposite an unhooking zone between a lateral area of the hinge axis and its central area with a weaker cross-section. You also have to stop yourself in the blocking position Ensure located locking piece. This target

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position retention is advantageously achieved by a Locking bead guaranteed along the lower longitudinal edge of the seat.

It can thus be seen that the assembly of the wiper blade on the windshield wiper arm is carried out in a very simple manner

can be done by inserting the locking piece into the space inside the central zone of the bracket, the cap firmly connected to the end of the wiper arm covers this central zone in such a way that its openings come to lie opposite the openings of the holder, the axis then through the openings of the cap and the Bracket is inserted and the locking piece is moved into its position blocking the axis.

is brought. . ■ ·.

According to a preferred embodiment of the invention is provided that the locking piece is designed so that it continues to ensure its own hold, even when the hinge axis is pulled out, for example to replace the wiper blade. The complete removal the locking piece is activated in both directions by the presence of a safety tongue or area tied on the locking piece, these two EIemente can come into contact with elements carried by the holder.

It can also be seen that dismantling the windshield wiper, for example when replacing the wiper blade, is very simple.

The invention thus relates to the new industrial product, which is a windshield wiper, in particular is intended for cleaning the windshields of motor vehicles and that includes: 1. A wiper arm, the end of which is connected to a U-shaped hinge cap, the sides of the cap having two circular opposite sides Have openings, and 2. a wiper blade,

sen holder with a to rest on the windshield to be wiped certain wiper blade is connected, wherein the central area of the holder has two sides, which have two opposing circular holes, the cap with the arm in the central area the bracket overlaps, with a hinge axis in a direction substantially perpendicular to the sides of the central Area and the sides of the cap is arranged transversely through its openings and holes and with the axis lateral cylindrical areas with essentially the same diameter as the openings and the holes that you use Providing a swivel joint associated with; the wiper is characterized in that the Joint axis has a central zone, which is intended to be received in the space between the two sides of the central area of the bracket is determined, the central zone having a weaker cross-section than the side framing it having cylindrical areas, and that a locking piece extending transversely to the axis in this interior space is mounted to slide parallel to the center line of the central portion, the locking piece having a Has seat, the axis of which is arranged substantially perpendicular to the sides of the central portion of the bracket with the seat open laterally over its entire length to accommodate the central zone of the hinge axis and has a sufficiently narrowed cross-section around at least one lateral area of the axis to prevent the passage, wherein at least one holding device carried by the locking piece, the position maintenance of the piece in relation to the axis.

Preferably, the central area of the bracket is made formed a U-profile whose web zwisehen the connection forms the two sides having the holes.

According to a special embodiment of the locking piece, this has opposite each side of the central

central area of the bracket on a support surface that is intended is, with a view to a transverse locking with the corresponding connection zone between the central zone of the hinge axis and the corresponding lateral cylindrical area is present to cooperate.

According to a further characteristic of the present invention is each of the circular holes of the sides of the central area of the Holder bordered by a cylindrical collar which protrudes into the interior space between the sides, with the locking piece opposite each side has two longitudinally directed guide ribs, which are displaced with the upper area or with the lower area of the assigned federation cooperate.

Furthermore, the locking piece preferably has a holding device on, which consists of at least one locking element, which consists in particular of a locking bead that extends along the side opening of the is arranged for the central zone of the axis specific seat.

The locking piece can also have a holding device which prevents its complete detachment from the bracket, even if the hinge axis is pulled out. This device consists on the one hand a safety tongue located on the opposite side to the side where the central zone of the axle is seated, and on the other hand from an area which is located on the side having this seat, with the tongue and this area in abutment can come with the aforementioned federal regulations.

According to an advantageous embodiment of the hinge axis is the central zone cylindrical, in this case the seat of the central Zone of the axis is preferably also cylindrical. In the event that the central zone of the hinge axis and its seat are cylindrical, it is preferably ensured that the connection zones between the central zone and the lateral areas are frustoconical. 35

According to a special embodiment of the locking piece of the windshield wiper according to the invention, it is

the locking piece is a piece of plastic that has the following components: 1. A central web with two opposite side walls arranged parallel to one another, 2. an upper plate with a bulged one upper surface, which is to rest on the inner surface of the connecting the sides of the U-profile of the bracket Web is determined and protrudes laterally on both sides of the web, whereby two longitudinal ribs for guiding the locking piece arise at the collar arrangements, 3. a lower one protruding laterally on both sides of the web Plate so that two longitudinal ribs for guiding the locking piece arise on the collar assemblies, with the lower plate at its end further from the seat towards is bent back to this seat, whereby the safety tongue is formed, the area that comes together with the safety tongue prevents the complete detachment of the locking piece from the bracket, at the central Web is formed.

According to a second characteristic of the invention the wiper between the cap and the central area of the holder is firmly connected to the cap Anti-noise bar on.

In order that the subject matter of the present invention may be better understood, one will now refer to the accompanying drawing illustrated embodiment, which is only used as an example and is not a limitation, described.

In the drawing show:

- Figure T is a perspective view of a windshield wiper according to the invention;

- Fig. 2 is a partial longitudinal section through the central area of the holder, which the locking piece during shows its displacement to bring it into position;

FIG. 3 is a sectional view similar to FIG. 2

III-III of Fig. 4, the locking piece in its Position for locking the hinge axis is shown;

Fig. 4 is a cross-sectional view along IV-IV of Fig. 3;

5 is a perspective view of the locking piece for equipping the windshield wiper of the invention;

6 is a partial longitudinal section through the central area of the holder, showing a modified embodiment of the locking piece;

FIG. 7 is a plan view of the device of FIG. 6; and

FIG. 8 is a partial perspective view of the holder with another variant of the locking piece Is provided.

1 shows a windshield wiper blade which, in the usual manner, comprises a holder 1, the two rods 2, 3, which are hinged to pivot points 4 and 5, respectively, which are each located at one end of the holder 1 are. Each of the ends of the rods 2, 3 carries a pair of grippers. These pairs of grippers are identified by the reference numerals 6, 7 and 8, 9 respectively. The grippers are around a profile 10 made of plastic, in the upper part of which the elastomer profile the wiper blade 11 of the wiper blade is inserted, bent.

The wiper blade is driven in a reciprocating motion around the windshield of a motor vehicle to wipe by means of a wiper arm 12, which is connected to the holder 1 via a U-shaped joint cap 13. The cap 13 consists of a web 14 and two sides 15, the lower free edge of which is rounded. The web 14 has along its longitudinal axis two spaced apart holes 14a for passing through rivets 16 to ensure the attachment of the cap 13 to the wiper arm

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12, the outer surface of the web 14 being applied to the flat lower side of the arm 12 at its end and the arm 12 also has two holes 12a in correspondence with the holes 1Ma in the web 14 with a view to fastening through the rivets 16. The sides 15 of the cap 13 have two circular openings 17 which are arranged opposite one another and each on the central area of the relevant page 15 in the Near their lower rounded edge.

After the windshield wiper arm 12 has been attached to the holder 1, the cap 13 overlaps the central region 18 of the holder which consists of a U-profile with a web 19 and two sides 20. The dimensions of the cap 13 and the central Area 18 of the bracket 1 forming the U-profile are designed so that when the windshield wiper is mounted, the webs 14 and 19 are at a distance from each other, while the sides 15 and 20, which are opposite each other, are relatively close to each other. The sides 20 also each have a circular hole 21 on. The holes 21 are opposite one another and have essentially the same diameter as the openings 17 in the sides 15 of the cap 13. When the windshield wiper is assembled, the openings 17 are opposite the holes 21. Furthermore, the holes 21 are each bordered on the inside by a collar 22, which by bending over the the wall representing the sides 20 is formed at right angles inward.

A hinge axis 23 is perpendicular to the sides 20 of the U-profile forming the central area 18 of the holder 1 and arranged perpendicular to the sides 15 of the cap 13, this axis 23 being the one provided for this purpose Openings 17 and holes 21 passes through. The hinge axis 23 consists of a cylindrical pin, the end faces 24 of which are rounded and its central area 25, which is intended to be the interior of the central area 18 of the bracket 1 forming U-profile assumes a

weaker diameter than the two lateral cylindrical areas 26, which frame the central region 18, has. In order to facilitate the manufacture of the axis 23, the connection zones 27 are between the lateral cylindrical areas 26 and the central area 25 with a smaller diameter are frustoconical. In In the assembled state, each lateral cylindrical Be-26 and the associated frustoconical region 27 are essentially in the openings 17, the holes 21 and the interior of the collar arrangements 22, while the end of the connection zone 27 with a smaller diameter is located approximately at the level of the edge end of the collar arrangements 22 Un the cylindrical area 26 protrudes slightly over the sides 15 of the cap 13 to the outside.

Furthermore, between the cap 13 and the U-profile that the central Representing the area of the holder 1, an anti-noise bar 28 made of plastic is used. The bracket 28 conforms substantially to the inner wall of the cap 13 so that its web 29 against the web 14 of the cap 13 presses and its sides 30 are located on the sides 15 of the cap 13 and in the lower region of the interior of the cap 13 the gap between the sides 15 and the sides 20 of the central area 18 the bracket 1 forming U-profile occupy. The web 29 has two Openings 29a for the rivets 16 to pass through. The sides 30 also have two opposite openings 31 to allow the passage of the To enable joint axis 23. Furthermore, the anti-noise bar 28 has a bead 33 on its entire front edge, which is intended to to cover the front edge of the windshield wiper arm 13 and the corresponding front edge of the cap 13. The anti-noise bar also shows 28 has a bead 33 on its rear edge, which is intended to to press against the corresponding entire rear edge of the cap 13.

The blocking of the axle 23 is ensured by a locking piece denoted by the reference number 34. In the case of the locking piece 34, which is shown in more detail in FIG is shown, it is a piece of plastic with a central web 35 between a lower plate 36 and a top plate 37 is arranged. The footbridge 35

has a central element 38 which is in the shape of a rectangular parallelepiped, in one side wall of which a recess is mounted, the bottom of which a represents the cylindrical seat 39 with its axis perpendicular to the two opposite sides 40 of the element 38, wherein the seat 39 runs out in these two walls 40 and also opens laterally. The lower edge of the seat 39 is connected to an inclined wall 41, which is the lower edge of the element 38, which is perpendicular to the wall 40, achieved in such a way that at the entrance of the seat 39 a locking bead 42 arises and its upper edge is tangent to the planar and parallel to the base of the piece 38 Underside of a protrusion 43 connected to the shape of a rectangular flat parallelepiped protruding from the element 38 and which is in the extension of the Walls 40 arranged side walls 44, a front side 45 and one arranged in the same plane as the element 38 Having top.

The element 38 has on its side surface, that of the surface, on which the recess ending in the seat 39 is attached, a further projection 46, the side walls of which 47 are in the same plane as the side walls of the upper plate 37, the upper side of which is in the extension of the element 38 is located and the one substantially has a greater height than that of the protruding area 43. The end side of the projection 46 is with the Reference numeral 48 denotes.

A reinforcing rib 49 connects the underside of the projection 46 with that located on the rear part of the seat 39 Side wall of element 38.

The element 38 rests firmly on the lower plate 36 and is firmly connected to this, which consists of a strip of material in the form of a rectangular elongated parallelepiped consists of small thickness, runs out on both sides in side walls 40 to form ribs 50, over

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the inclined wall 41 extends out and finally in Direction to the seat 39 is bent back to form a tongue 51.

The top plate 37 completely covers the top surface of the web 35 and runs laterally to form lateral ones Ribs 52 which protrude from the side walls 40 and 44 and which end with a cylindrical portion 47a, which is formed by the projection 46 which protrudes laterally on both sides of the central element 38 of the web 35 is. Furthermore, the upper surface 53 of the upper plate 37 is curved so that it is in contact with the inside of the web 19 of the central area 18 of the holder 1 can come.

! 5 The assembly of the wiper blade on the wiper arm 12 is done in the following way:

The locking piece is guided into the interior of the central zone 18 of the holder 1 with the tongue 51 having Side of piece 34 one, with the lower ribs

50 and upper ribs 52 of piece 34 in a sliding motion with the lower and uppermost portions of the collar assemblies 22 cooperate and the tongue 51 bends back to pass under the collar arrangements 22.

The piece 34 is allowed to slide into a position in which

its seat 39 lies beyond the holes 21, these holes being at the level of the piece 34 in relation to the Region which separates the inclined wall 41 and the front edge of the go tongue 51 from one another are located.

The mixture is subsequently assigns the wiper arm 12 on which one has connected with the rivets 16 secured to the cap 13 and the anti-noise bracket 28 so that the cap 13 the cen- ₃ g spectral region overlaps 18 of the bracket 1, wherein the central region arranged so is that the safety tongue

51 of the locking piece 34 opposite the front edge of the arm 12 is located. It is set up in such a way that the public

3 430

openings 17 of the cap 13 and the holes 21 of the holder 1 are opposite one another. Then you set the axis 23 so that it is in the position shown in FIG. You can see that in this position the Translational movement of the axis 23, once it is in this position, theoretically through cooperation between the lower edge of the walls 44 and the connection zones 27 is prevented.

It is then sufficient to slide the piece 34 so far continue until the central zone 25 of the axis 23 is in the seat 39. This position is shown in FIG. 3. It can be clearly seen that the side walls 40 are now with the zones 27 while achieving an optimal Lateral locking of the axis 23 cooperate. The locking bead 42 ensures that the position is maintained Piece 34 in relation to axis 23.

If the piece were to become detached from the axle 23 during operation of the windshield wiper, this would still be blocked in the transverse direction by the lower edges of the side walls 44 will. The tongue 51 and the area 47a also prevent the complete removal of the locking piece 34 by this in abutment with the collar assemblies 22 arrives.

It goes without saying that the above-described embodiment does not imply any limitation and all can be subjected to desired modifications without departing from the scope of the invention.

In FIGS. 6 and 7 another embodiment of the locking piece can be seen, which enables an easier detachment of the axis 23 from this piece.
35

The elements of this locking piece with the elements already described with reference to the preceding figures are comparable or play an analogous role are

are neither denoted by the same reference symbols nor have reference symbols which are the sum of 100 and that of the preceding ones Figures correspond to the reference numerals used. The description of these elements is not repeated. 5

The locking piece 134 of FIGS. 6 and 7 has an extension 54, which is preferably provided on the side opposite the seat 39 of the axis 23. This extension 54 is at its end with a protuberance 55 is provided, which protrudes transversely through an elongated opening provided in the web 19 of the holder 101. This As can be seen in FIG. 7, opening 56 has a rectangular shape, the angles being rounded. The length This opening is sufficient to act on the protuberance 55 and to allow the axis 23 to be removed from the seat 39 when a sliding movement is caused.

This protuberance 55 can be in the form of a kind of rectangular Button (Fig. 7), which protrudes on the top of the web of the bracket 101, be formed. An area 57 of this button 55 with a weaker cross section pierces the opening 56 and is with the end of the extension 54 connected. The protuberance 55 thus represents a different piece from the extension 54. If this The protuberance is joined to the extension 54, in particular by gluing, is the web 19 of the holder 101 enclosed between the protuberance 55 and the end of the extension 54, as can be seen from FIG.

The embodiment of Figure 7 provides easy access to protuberance 55 and consequently enables easier actuation of the sliding movement of the locking piece for locking or unlocking the axis 23

FIG. 8 illustrates, in a schematic representation, a further embodiment according to that shown in FIG Extension is provided with a protuberance 58 in the transverse direction on one of the sides of the U-cross section of the

1 holder 101 protrudes. The solution of Fig. 8 enables easy operation of the sliding movement of the piece 134, but avoiding the need to provide an opening in the web 19 of the holder, as is the case with

5 of the opening 56 according to the solution of FIGS. 6 and 7 is present,

Claims (14)

Expectations: 1. Windshield wipers, especially for wiping motor vehicle windshields, comprising firstly a wiper arm (12), the end of which is provided with a U-shaped hinge cap (13), the sides (15) of the cap (13) having two circular openings (17), and secondly a wiper blade, its holder (1) with a wiper blade intended to rest on the windshield to be wiped (11) is connected, wherein the central region (18) of the holder (1) has two sides (20), the two of each other opposite circular holes (21) with the cap (13) of the arm (12) being the central area (18) of the holder (1) overlaps, with a hinge axis (23) in a substantially perpendicular direction to the sides (20) of the central area (18) of the holder (1) and to the sides (15) of the cap (13) across the openings (17), or. Holes (21) is arranged and wherein the axis (23) lateral cylindrical areas (26) with essentially the same diameter as the openings (17) and the holes (21) which are assigned to it for providing a swivel joint, characterized in that that the hinge axis (23) has a central zone (25) which is to be received in the space between the two sides (20) of the central region (18) of the holder (1) is determined, the central zone (25) having a weaker cross-section than the lateral cylindrical areas (26) framing them, and that one extending transversely to the axis (23) Locking piece (3 * 0 is attached in this interior, to slide parallel to the center line of the central area, the locking piece (34) having a seat (39), whose axis is arranged essentially perpendicular to the sides (20) of the central region (18) of the holder (1) is, the seat (39) laterally over its entire length for receiving the central zone (25) of the The hinge axis (23) is open and has a sufficiently narrowed cross-section to at least one lateral Area (26) of the axis (23) at the passage towards dern, with at least one carried by the locking piece Holding device ensures the position retention of the piece (34) in relation to the axis (23). 2. Windshield wiper according to claim 1, characterized in that the central region (18) of the holder (1) consists of a U-profile, the web (19) of which a connection forms between the two sides (20) having the holes (21). 3. Windshield wiper according to one of claims 1 or 2, characterized in that the locking piece (34) opposite to the two sides (20) of the central Area (18) of the holder (1) has a bearing surface, which is intended to achieve a transverse locking with the corresponding connection zone (27) between the central zone (25) of the hinge axis (23) and the corresponding lateral cylindrical area (26) to work together. 4. Windshield wiper according to claim 1 to 3, characterized in that the circular holes (21) of the sides (20) of the central area (18) of the holder (1) are each surrounded by a cylindrical collar (22), which in protrudes the interior space between the sides (20), wherein the locking piece (34) in each case opposite to the Sides (20) has longitudinally extending guide ribs (50, 52) which during a sliding movement with the upper or with cooperate with the lower region of the associated collar (22). 5. Windshield wiper according to one of claims 1 to 4, characterized in that it has a holding device, which consists of at least one locking element. 6. Windshield wiper according to Claim 5, characterized in that that the locking element consists of a locking bead (42) which extends along the side opening of the seat (39), / 1% ■ · ■■ · ■: - ■ - which is intended for the central zone (25) of the axis (23) is arranged. 7. Windshield wiper according to one of claims 5 or 6 in combination with claim 4, characterized in that it has a holding device which enables the locking piece (34) to be completely detached from the holder itself prevented when the joint axis (23) is removed, this holding device on the one hand consisting of a safety zone (51), , Q which is on the side facing the seat (39) of the central Zone (25) of the axis (23) is opposite, and on the other hand consists of a region (47a) on the this seat (39) carrying side is arranged, wherein the tongue (51) and the area (47a) can come into contact with the bundle arrangements (22). 8. Windshield wiper according to one of claims 1 to 7, characterized in that that the central zone (25) of the axis (23) is cylindrical. 9- windshield wiper according to claim 8, characterized in that the seat (3) of the central zone (25) of the axis (23) is cylindrical. 10. Windshield wiper according to one of claims 8 or 9, characterized in that that the connection zone (27) between the central zone (25) and the lateral areas (26) of the axis (23) are frustoconical is. 11. Windshield wiper according to Claims 2 to 7, characterized in that that the locking piece (34) is a piece of plastic that has the following components: firstly, a central one Web (35) with two opposite, parallel side walls, secondly an upper plate (37), which is a curved upper Surface (53) intended to rest on the inner surface of the web (19) which connects the sides (20) of the U-profile of the holder (1) is, and laterally protrudes on both sides of the web (35), so that two longitudinally extending ribs (52) for guiding the Locking piece (34) on the collar arrangements (22) and, thirdly, a lower plate (36), which is laterally on both sides of the web (35) protrudes, whereby longitudinal ribs (50) for guiding the locking piece (34) arise on the collar arrangements (22), the lower plate (36) being further removed from the seat (39) The end is bent back in the direction of the seat (39), so that a safety tongue (51) is formed, and an area (47a) is formed on the central web (35), which together with the tongue (5.1) the complete. Loosening of the locking piece (34) from the holder (1) prevented. 12. Windshield wiper according to one of claims 1 to 11, characterized in that there is an anti-noise bar between the cap (13) and the central area (18) of the holder (1) (28) made of plastic, which is firmly connected to the cap (13). 13 · Windshield wiper according to one of Claims 1 to 6 one of claims 8 to 10 or according to claim 12, characterized ■ characterized in that the locking piece (134) is an extension (54), which is provided at its end with a protuberance (55), which by a längliehe, im Web (19) of the holder (101) provided opening (56) protrudes, wherein the length of the opening (56) is sufficient to through a displacement of the protuberance (55) in the opening (56) to enable the axis (23) to be released from the seat (39). 14. Windshield wiper according to one of claims 1 to 6, according to one of claims 8 to 10 or according to claim 12, characterized characterized in that the locking piece (134) has an extension which, in the direction of its end, has a protuberance (58) which protrudes in the transverse direction to one of the sides of the U-cross section of the holder (101).