EP1406796A1 - Cast fixing element for a wiper arm - Google Patents

Cast fixing element for a wiper arm

Info

Publication number
EP1406796A1
EP1406796A1 EP01953134A EP01953134A EP1406796A1 EP 1406796 A1 EP1406796 A1 EP 1406796A1 EP 01953134 A EP01953134 A EP 01953134A EP 01953134 A EP01953134 A EP 01953134A EP 1406796 A1 EP1406796 A1 EP 1406796A1
Authority
EP
European Patent Office
Prior art keywords
fastening part
groove
wiper arm
cast
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01953134A
Other languages
German (de)
French (fr)
Inventor
Jozef Vermeulen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1406796A1 publication Critical patent/EP1406796A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/3425—Constructional aspects of the arm
    • B60S1/3436—Mounting heads
    • B60S1/3438—Manufacturing details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/3425—Constructional aspects of the arm
    • B60S1/3445—Joints between elements
    • B60S1/345—Joints between elements the elements being a link piece and a mounting head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/69—Redundant disconnection blocking means

Definitions

  • the invention relates to a cast fastening part for a windshield wiper arm, with a through opening for a bearing bush and a receptacle for a retaining pin.
  • Such a fastening part serves to connect a wiper arm to a drive motor.
  • a tension spring is mounted which presses the wiper arm 'against the windshield to be cleaned.
  • the fastening part which is a casting, was drilled after casting in order to obtain a through hole for the bearing bush and another hole for receiving the retaining pin.
  • a disadvantage of this manufacturing process is the high effort, which is connected on the one hand with the machining of the fastening part and on the other hand with compliance with the required tolerances for the two bores.
  • the fastening part with the features of claim 1 has the advantage that no machining is required to create the receptacle for the retaining pin.
  • the groove serving as a receptacle is created during the casting process.
  • the retaining pin only has to be later inserted into the groove and caulked in it.
  • the surface of the through opening is produced by direct molding of a molded part. Machining is therefore no longer required for the production of the through opening, and the same advantages result as in the absence of machining for receiving the retaining pin.
  • 1 shows a complete wiper arm from below
  • 2 shows a side view of the wiper arm from FIG. 1
  • FIG. 3 shows the fastening part used in the windshield wiper arm from FIG. 2 in a broken, partially sectioned view
  • FIG. 4 shows the fastening part from FIG. 3 in a view from below
  • FIG. 5 shows, in an enlarged view, a section through the fastening part along the plane V-V of FIG. 3.
  • FIG. 1 and 2 show a wiper arm which consists of a fastening part 10, a sheet metal part 20 and a bracket 18 which is fixedly connected to the bending part.
  • the fastening part 10 has a receiving bore 26, by means of which it can be connected to a windshield wiper drive (not shown).
  • the sheet metal part 20 is rotatably fastened to the fastening part 10 by means of a bearing bush 28 which is inserted into a through opening 14.
  • a tension spring 22 is attached, which is suspended on a retaining pin 16 on the fastening part and serves to press the wiper blade against a pane to be cleaned via the extension arm.
  • the fastening part which is a cast part, will now be described in more detail with reference to FIGS. 3 to 5.
  • the through opening 14 is created by molding a suitable section of the mold in which the fastening part is cast. In this way, the required tolerances can be observed immediately, so that no post-processing is required, and the bearing bush 28 can be pressed directly into the through opening.
  • the holding pin 16 is arranged in a groove 30 which is closed at both ends in the axial direction. This groove is also created by molding a suitable section of the mold, so that no post-processing is required. The retaining pin is then inserted into the groove 30, whereby it cannot slip in the axial direction since the groove is closed.
  • the fastening part 10 is deformed via a deformation stamp (not shown) in the region of the groove in such a way that at least one lug 12 is produced which holds the holding pin 16 securely in its position.
  • This caulking of the retaining pin offers an extremely effective securing of the retaining pin on the fastening part 10 and can also be accomplished with little mechanical effort.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Insertion Pins And Rivets (AREA)
  • Connection Of Plates (AREA)
  • Clamps And Clips (AREA)

Abstract

The invention relates to a cast fixing element (10) for a wiper arm, comprising a through opening (14) for a bearing bush and a seat for a locking pin (16). To simplify production of such a fixing element, the seat for the locking pin is configured as a groove (30) that is closed at its ends.

Description

Guß-Befestigunqsteil für einen Scheibenwischerarm Cast attachment for a wiper arm
Stand der TechnikState of the art
Die Erfindung betrifft ein Guß-Befestigungsteil für einen Scheibenwischerarm, mit einer Durchgangsöffnung für eine Lagerbuchse und einer Aufnahme für einen Haltestift.The invention relates to a cast fastening part for a windshield wiper arm, with a through opening for a bearing bush and a receptacle for a retaining pin.
Ein derartiges Befestigungsteil dient dazu, einen Scheibenwischerarm mit einem Antriebsmotor zu verbinden. Auf der Lagerbuchse ist drehbar der Scheibenwischerarm gelagert, und an dem Haitestift wird eine Zugfeder eingehängt, die den Scheibenwischerarm 'gegen die zu reinigende Scheibe drückt.Such a fastening part serves to connect a wiper arm to a drive motor. On the bearing bush of the screen wiper arm is rotatably supported, and at the Haitestift a tension spring is mounted which presses the wiper arm 'against the windshield to be cleaned.
Bisher wurde das Befestigungsteil, das ein Gußteil ist, nach dem Gießen gebohrt, um eine Durchgangsbohrung für die Lagerbuchse und eine weitere Bohrung zur Aufnahme des Haltestifts zu erhalten. Nachteilig bei diesem Herstellungsverfahren ist der hohe Aufwand, der zum einen mit der spanenden Bearbeitung des Befestigungsteils und zum anderen ι it der Einhaltung der erforderlichen Toleranzen für die beiden Bohrungen verbunden ist.So far, the fastening part, which is a casting, was drilled after casting in order to obtain a through hole for the bearing bush and another hole for receiving the retaining pin. A disadvantage of this manufacturing process is the high effort, which is connected on the one hand with the machining of the fastening part and on the other hand with compliance with the required tolerances for the two bores.
Es ist daher Aufgabe der Erfindung, ein Befestigungsteil bereitzustelle n, das mit geringerem Aufwand hergestellt werden kann. Vorteile der ErfindungIt is therefore an object of the invention to provide a fastening part which can be produced with less effort. Advantages of the invention
Das Befestigungsteil mit den Merkmalen des Patentanspruchs 1 hat- den Vorteil, daß keine spanende Bearbeitung erforderlich ist, um die Aufnahme für den Haltestift zu schaffen. Die als Aufnahme dienende Nut wird beim Gußvorgang geschaffen. Der Haltestift muß später lediglich in die Nut eingelegt und in dieser verstemmt werden. Es ergibt sich weiterhin der Vorteil, daß während des eigentlichen Herstellungsverfahrens keinerlei Aufwand erforderlich ist, um die vorgegebenen Toleranzen einzuhalten; die Anordnung der Nut wird bei der Fertigung der Gußform mit der erforderlichen Genauigkeit berücksichtigt und dann bei jedem Abformvorgang reproduziert.The fastening part with the features of claim 1 has the advantage that no machining is required to create the receptacle for the retaining pin. The groove serving as a receptacle is created during the casting process. The retaining pin only has to be later inserted into the groove and caulked in it. There is also the advantage that no effort is required during the actual manufacturing process in order to meet the specified tolerances; the arrangement of the groove is taken into account in the manufacture of the casting mold with the required accuracy and then reproduced in each molding process.
Gemäß einer bevorzugten Ausführungsform der Erfindung ist vorgesehen, daß die Oberfläche der Durchgangsöffnung durch direktes Abformen eines Gußformteils hergestellt ist. Somit ist auch für die Herstellung der Durchgangsöffnung keine spanende Bearbeitung mehr erforderlich, und es ergeben sich dieselben Vorteile wie bei dem Verzicht auf die spanende Bearbeitung für die Aufnahme des Haltestiftes.According to a preferred embodiment of the invention it is provided that the surface of the through opening is produced by direct molding of a molded part. Machining is therefore no longer required for the production of the through opening, and the same advantages result as in the absence of machining for receiving the retaining pin.
Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Advantageous refinements of the invention result from the subclaims.
Zeichnungendrawings
Die Erfindung wird nachfolgend anhand einer bevorzugten Ausführungsform beschrieben, die in den beigefügten Zeichnungen dargestellt ist. In den Zeichnungen zeigen:The invention is described below with reference to a preferred embodiment, which is illustrated in the accompanying drawings. The drawings show:
- Fig. 1 einen kompletten Scheibenwischerarm von unten, - Fig. 2 den Scheibenwischerarm von Fig. 1 in einer Seitenansicht,1 shows a complete wiper arm from below, 2 shows a side view of the wiper arm from FIG. 1,
- Fig. 3 das bei dem Scheibeπwischerarm von Fig. 2 verwendete Befestiguπgsteil in einer abgebrochenen, teilweise geschnittenen Ansicht,3 shows the fastening part used in the windshield wiper arm from FIG. 2 in a broken, partially sectioned view,
- Fig. 4 das Befestigungsteil von Fig. 3 in der Ansicht von unten; und4 shows the fastening part from FIG. 3 in a view from below; and
- Fig, 5 in einer vergrößerten Ansicht einen Schnitt durch das Befestigungsteil entlang der Ebene V-V von Fig. 3.5 shows, in an enlarged view, a section through the fastening part along the plane V-V of FIG. 3.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In den Figuren 1 und 2 ist ein Scheibenwischerarm dargestellt, das aus einem Befestigungsteil 10, einem Blechteil 20 und einem fest mit dem Biechteil verbundenen Ausleger 18 besteht.1 and 2 show a wiper arm which consists of a fastening part 10, a sheet metal part 20 and a bracket 18 which is fixedly connected to the bending part.
Das Befestigungsteil 10 weist eine Aufnahmebohrung 26 auf,, mittels der es mit einem (nicht dargestellten) Scheibenwischerantrieb verbunden werden kann. Das Blechteil 20 ist am Befestigungsteil 10 drehbar mittels einer Lagerbuchse 28 befestigt, die in eine Durchgangsöffnung 14 eingesetzt ist. Am Blechteil ist' eine Zugfeder 22 angebracht, die an einem Haltestift 16 am Befestigungsteil eingehängt ist und dazu dient, das Scheibenwischerblatt über den Ausleger gegen eine zu reinigende Scheibe zu drücken.The fastening part 10 has a receiving bore 26, by means of which it can be connected to a windshield wiper drive (not shown). The sheet metal part 20 is rotatably fastened to the fastening part 10 by means of a bearing bush 28 which is inserted into a through opening 14. On the sheet metal part ' a tension spring 22 is attached, which is suspended on a retaining pin 16 on the fastening part and serves to press the wiper blade against a pane to be cleaned via the extension arm.
Anhand der Figuren 3 bis 5 wird nun das Befestigungsteil, das ein Guß-teil ist, ausführlicher beschrieben. Die Durchgangsöffnung 14 ist durch Abformen eines geeigneten Abschnittes der Gußform erzeugt, in der das Befestigungsteil gegossen wird. Auf diese Weise können die erforderlichen Tole ranzen unmittelbar eingehalten werden, so daß keine Nachbearbeitung erforderlich ist, und die Lagerbuchse 28 kann direkt in die Durchgangsöffnung eingepreßt werden. Der Haltestift 16 ist in einer Nut 30 angeordnet, die in axialer Richtung an beiden Enden geschlossen ist. Auch diese Nut wird durch Abformen eines geeigneten Abschnittes der Gußform erzeugt, so daß keine Nachbearbeitung erforderlich ist. Der Haltestift wird dann in die Nut 30 eingelegt, wobei er in axialer Richtung nicht verrutschen kann, da die Nut geschlossen ist. Dann wird das Befestigungsteil 10 über einen Verformungsstempel (nicht gezeigt) im Bereich der Nut so verformt, daß wenigstens eine Nase 12 erzeugt wird, die den Haltestift 16 sicher in seiner Lage hält. Dieses Verstemmen des Haltestifts bietet eine äußerst wirksame Sicherung des Haltestifts am Befestigungsteil 10 und läßt sich zudem mit geringem maschinellen Aufwand bewerkstelligen. The fastening part, which is a cast part, will now be described in more detail with reference to FIGS. 3 to 5. The through opening 14 is created by molding a suitable section of the mold in which the fastening part is cast. In this way, the required tolerances can be observed immediately, so that no post-processing is required, and the bearing bush 28 can be pressed directly into the through opening. The holding pin 16 is arranged in a groove 30 which is closed at both ends in the axial direction. This groove is also created by molding a suitable section of the mold, so that no post-processing is required. The retaining pin is then inserted into the groove 30, whereby it cannot slip in the axial direction since the groove is closed. Then the fastening part 10 is deformed via a deformation stamp (not shown) in the region of the groove in such a way that at least one lug 12 is produced which holds the holding pin 16 securely in its position. This caulking of the retaining pin offers an extremely effective securing of the retaining pin on the fastening part 10 and can also be accomplished with little mechanical effort.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
10: Befestigungsteil 12: Nase 14: Durchgangsöffnung 16: Haltestift 18: Ausleger 20: Blechteil 22: Haltebügel 24: Feder10: fastening part 12: nose 14: through opening 16: retaining pin 18: bracket 20: sheet metal part 22: bracket 24: spring
26: Aufnahmebohrung '28: Lagerbuchse 30: Nut 26: Location bore '28: Bearing bush 30: Groove

Claims

Patentansprüche claims
1 . Guß-Befestigungsteil (10) für einen Scheibenwischerarm, mit einer Durchgangsöffnung (14) für eine Lagerbuchse und einer Aufnahme für einen Haltestift (16), dadurch gekennzeichnet, daß die Aufnahme für den Haltestift eine Nut (30) ist, die an ihren Stirnseiten geschlossen ist.1 . Cast fastening part (10) for a windshield wiper arm, with a through opening (14) for a bearing bush and a receptacle for a holding pin (16), characterized in that the receptacle for the holding pin is a groove (30) which is closed on its end faces is.
2. Befestigungsteil nach Anspruch 1 , dadurch gekennzeichnet, daß in der Nut der Haltestift (16) angeordnet ist und daß das Befestigungsteil (1 0) mit Nasen (12) versehen ist, die den Haltestift in der Nut festlegen.2. Fastening part according to claim 1, characterized in that the retaining pin (16) is arranged in the groove and that the fastening part (1 0) is provided with lugs (12) which fix the retaining pin in the groove.
3. Befestigungsteil nach Anspruch 2, dadurch gekennzeichnet, daß die Nasen (12) einstückig mit dem Befestigungsteil (10) ausgebildet sind und durch plastische Verformung eines Randabschnittes der Nut erhalten sind.3. Fastening part according to claim 2, characterized in that the lugs (12) are integrally formed with the fastening part (10) and are obtained by plastic deformation of an edge portion of the groove.
4. Befestigungsteil nach einem der vorgehenden Ansprüche, dadurch gekennzeichnet, daß es ein Druckgußteil ist.4. Fastening part according to one of the preceding claims, characterized in that it is a die-cast part.
5. Befestigungsteil nach Anspruch 4, dadurch gekennzeichnet, daß die Oberfläche der Durchgangsöffnung (14) durch direktes Abformen eines Gußformteils hergestellt ist.5. Fastening part according to claim 4, characterized in that the surface of the through opening (14) is made by direct molding of a molded part.
6. Befestigungsteil • nach einem der Ansprüche 4 und 5, dadurch gekennzeichnet, daß es aus einer Zinklegierung besteht.6. Fastening part • according to one of claims 4 and 5, characterized in that it consists of a zinc alloy.
7. Befestigungsteil nach einem der Ansprüche 4 und 5, dadurch gekennzeichnet, daß es aus einer Aluminiumlegierung besteht. 7. Fastening part according to one of claims 4 and 5, characterized in that it consists of an aluminum alloy.
EP01953134A 2001-07-06 2001-07-06 Cast fixing element for a wiper arm Withdrawn EP1406796A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2001/002454 WO2003004322A1 (en) 2001-07-06 2001-07-06 Cast fixing element for a wiper arm

Publications (1)

Publication Number Publication Date
EP1406796A1 true EP1406796A1 (en) 2004-04-14

Family

ID=5648257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01953134A Withdrawn EP1406796A1 (en) 2001-07-06 2001-07-06 Cast fixing element for a wiper arm

Country Status (7)

Country Link
US (1) US20040037631A1 (en)
EP (1) EP1406796A1 (en)
JP (1) JP2004521021A (en)
KR (1) KR20030031163A (en)
BR (1) BR0113707A (en)
HU (1) HUP0302698A2 (en)
WO (1) WO2003004322A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT413343B (en) * 2003-07-17 2006-02-15 Dgs Druckguss Systeme Ag METHOD FOR PRODUCING A LIGHTWEIGHT FUNCTION PART
JP5852438B2 (en) * 2011-03-09 2016-02-03 アスモ株式会社 Arm head
EP2790970B1 (en) * 2011-12-14 2019-03-06 Federal-Mogul S.a. Windscreen wiper arm
DE102016206159A1 (en) * 2016-04-13 2017-10-19 Robert Bosch Gmbh Wischarmvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3625883A1 (en) * 1986-07-31 1988-02-04 Swf Auto Electric Gmbh Wiper arm, in particular for motor-vehicle wiper systems
DE3829466A1 (en) * 1988-08-31 1990-03-01 Swf Auto Electric Gmbh Wiper arm

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433513A (en) * 1967-04-10 1969-03-18 Trico Products Corp Windshield wiper arm
JPH0616847Y2 (en) * 1987-06-16 1994-05-02 自動車電機工業株式会社 Wiper arm
DE19651856A1 (en) * 1996-12-13 1998-06-18 Teves Gmbh Alfred Wiper arm for windscreen wiper of motor vehicle
DE19805461B4 (en) * 1998-02-11 2005-10-27 Robert Bosch Gmbh wiper arm
DE10010174B4 (en) * 2000-03-02 2005-02-17 Robert Bosch Gmbh Casting attachment for a windscreen wiper arm

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3625883A1 (en) * 1986-07-31 1988-02-04 Swf Auto Electric Gmbh Wiper arm, in particular for motor-vehicle wiper systems
DE3829466A1 (en) * 1988-08-31 1990-03-01 Swf Auto Electric Gmbh Wiper arm

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO03004322A1 *

Also Published As

Publication number Publication date
JP2004521021A (en) 2004-07-15
WO2003004322A1 (en) 2003-01-16
KR20030031163A (en) 2003-04-18
BR0113707A (en) 2003-07-08
US20040037631A1 (en) 2004-02-26
HUP0302698A2 (en) 2003-11-28

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