DE102011087595A1 - Telescopic vibration damper for wheel suspension of motor car, has valve connecting portion that is made of light metal alloy, mounted with bypass valve and connected by friction welding with outer tube - Google Patents

Telescopic vibration damper for wheel suspension of motor car, has valve connecting portion that is made of light metal alloy, mounted with bypass valve and connected by friction welding with outer tube Download PDF

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Publication number
DE102011087595A1
DE102011087595A1 DE102011087595A DE102011087595A DE102011087595A1 DE 102011087595 A1 DE102011087595 A1 DE 102011087595A1 DE 102011087595 A DE102011087595 A DE 102011087595A DE 102011087595 A DE102011087595 A DE 102011087595A DE 102011087595 A1 DE102011087595 A1 DE 102011087595A1
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Prior art keywords
outer tube
vibration damper
valve
telescopic vibration
light metal
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DE102011087595A
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German (de)
Inventor
Albert Bauer
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Priority to DE102011087595A priority Critical patent/DE102011087595A1/en
Publication of DE102011087595A1 publication Critical patent/DE102011087595A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • B23K20/129—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding specially adapted for particular articles or workpieces
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/325—Constructional features of cylinders for attachment of valve units
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2226/00—Manufacturing; Treatments
    • F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
    • F16F2226/048—Welding

Abstract

The telescopic vibration damper that generates the variable damping force, has an outer tube (1) made of a light metal alloy and a valve connecting portion (2) mounted with a bypass valve. The valve connecting portion is made of light metal alloy and connected by friction welding with the outer tube. The outer tube is formed with a radially directed aperture (3) and raised planar opening edges (4) that surround the radially directed aperture. An independent claim is included for a method for manufacturing the telescopic vibration damper.

Description

Die Erfindung betrifft einen Teleskop-Schwingungsdämpfer nach dem Oberbegriff des ersten Anspruchs.The invention relates to a telescopic vibration damper according to the preamble of the first claim.

Es ist bereits bekannt, Außenrohre von Teleskop-Schwingungsdämpfern aus Aluminium zu fertigen, wie in DE 100 33 060 B4 offenbart. Hier wird der Boden des Außenrohrs mittels Reibschweißen angebracht. Außerdem ist es bekannt, Teleskop-Schwingungsdämpfer mit Einrichtungen zur Verstellung der Dämpfkraft zu versehen. Gewöhnlich wird dies dadurch erreicht, dass wenigstens ein Dämpfungs- oder Bypassventil in radialer Richtung so an dem Außenrohr befestigt wird, dass dessen Ventilstutzen einen hydraulischen Anschluss an einen Bypasskanal zwischen Arbeitszylinder und Außenrohr bekommt. Dies ist in der DE 39 39 012 C2 beschrieben, wobei dort das Außenrohr ebenfalls aus Aluminium hergestellt ist. Das Dämpfungsventil ist hier über seinen Stutzen ins Außenrohr eingeschraubt.It is already known to produce outer tubes of telescopic vibration dampers made of aluminum, as in DE 100 33 060 B4 disclosed. Here, the bottom of the outer tube is attached by friction welding. It is also known to provide telescopic vibration damper with means for adjusting the damping force. This is usually achieved by fastening at least one damping or bypass valve in the radial direction to the outer tube such that its valve stub receives a hydraulic connection to a bypass channel between the working cylinder and the outer tube. This is in the DE 39 39 012 C2 described, where there the outer tube is also made of aluminum. The damping valve is screwed in here via its socket into the outer tube.

Aufbauend auf diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen Teleskop-Schwingungsdämpfer mit veränderbarer Dämpfkraft und einem Außenrohr aus Aluminium bereitzustellen, bei dem das Dämpfungsventil zuverlässig gasdicht, mit möglichst geringem Aufwand und gleichbleibender Qualität, in Serie mit einfachen Mitteln angebracht werden kann.Based on this prior art, the present invention seeks to provide a telescopic vibration damper with variable damping force and an outer tube made of aluminum, in which the damping valve reliably gas-tight, with the least possible effort and consistent quality, can be mounted in series with simple means ,

Die Aufgabe wird erfindungsgemäß durch die Merkmale des ersten Anspruchs gelöst. Bevorzugte Ausgestaltungen der Erfindung beschreiben die abhängigen Ansprüche.The object is achieved by the features of the first claim. Preferred embodiments of the invention describe the dependent claims.

Nach der Erfindung ist ein Teleskop-Schwingungsdämpfer mit veränderbarer Dämpfkraft, mit einem Außenrohr aus einer Leichtmetalllegierung, an dem über wenigstens einen Ventilstutzen wenigstens ein Bypassventil angebracht ist, dadurch gekennzeichnet, dass der Ventilstutzen aus einer Leichtmetalllegierung besteht und durch eine Reibschweißverbindung stoffschlüssig mit dem Außenrohr verbunden ist.According to the invention, a telescopic vibration damper with variable damping force, with an outer tube made of a light metal alloy on which at least one valve stub at least one bypass valve is mounted, characterized in that the valve stub consists of a light metal alloy and connected by a Reibschweißverbindung cohesively with the outer tube is.

Das hat den Vorteil, dass bei einer Fertigung von Außenrohren von Stoßdämpfern aus Aluminium oder aus einer Aluminiumlegierung die gasdichte Verbindung des Außenrohrs mit dem Bypassventil über den Ventilstutzen besonders preiswert und zuverlässig gegen Versagen und Flüssigkeitsaustritt auch in Großserienfertigung hergestellt werden kann.This has the advantage that in a production of outer tubes of shock absorbers made of aluminum or an aluminum alloy, the gas-tight connection of the outer tube with the bypass valve on the valve stub can be made particularly inexpensive and reliable against failure and fluid leakage in mass production.

Bevorzugte Ausführungsformen von Teleskop-Schwingungsdämpfern sind dadurch gekennzeichnet, dass das Außenrohr für jedes Bypassventil eine radial gerichtete Öffnung besitzt, die mit einem gegenüber dem Umfang des Außenrohres in radialer Richtung erhabenen ebenen Öffnungsrand umgeben ist.Preferred embodiments of telescopic vibration dampers are characterized in that the outer tube for each bypass valve has a radially directed opening which is surrounded by a relative to the circumference of the outer tube in the radial direction raised planar opening edge.

Die Herstellung der Öffnung des Außenrohrs mit einem diese umgebenden in Tangentialrichtung planen Öffnungsrand kann vorteilhafterweise zusammen mit der Herstellung des Außenrohrs selbst erfolgen. Ebenso einfach ist die seperate Herstellung des Ventilstutzens, insbesondere als zur Mittenlängsachse symmetrisches Bauteil aus Leichtmetall mit einer ebenfalls planen Stirnfläche mit kreiszylindrischer Wandung. Eine darauf folgende Verbindung der beiden Teile durch Reibschweißen, ist was die Dichtheit und die Belastbarkeit der Verbindung betrifft besonders einfach und mit gleichbleibender Qualität in der Serie herstellbar, wenn die Stirnfläche mit dem Öffnungsrand des Außenrohrs so korrespondiert, dass dieser deren Oberfläche abdeckt.The production of the opening of the outer tube with a surrounding in the tangential direction planning opening edge can advantageously be carried out together with the production of the outer tube itself. Equally simple is the separate production of the valve stub, in particular as a component symmetrical to the center longitudinal axis made of light metal with a likewise flat end face with a circular cylindrical wall. A subsequent connection of the two parts by friction welding is what the tightness and the load capacity of the connection relates to particularly simple and consistent quality in the series produced when the end face with the opening edge of the outer tube so that it covers the surface.

Ein vorteilhaftes Verfahren zur Herstellung eines Teleskop-Schwingungsdämpfers ist dadurch gekennzeichnet, dass durch koaxiales Zustellen des Öffnungsrands des Außenrohrs hin zum sich drehenden Ventilstutzen eine Reibschweißnaht zwischen Ventilstutzen und Außenrohr gebildet wird.An advantageous method for producing a telescopic vibration damper is characterized in that a friction weld between the valve stub and the outer tube is formed by coaxial feed of the opening edge of the outer tube towards the rotating valve stub.

Das hat den Vorteil, dass eine festigkeitsmäßig, entsprechend der notwendigen Anforderungen, einfach gestaltbare Verbindung zwischen Außenrohr und Ventilstutzen hergestellt werden kann.This has the advantage that a strength moderately, according to the necessary requirements, easily customizable connection between the outer tube and valve stub can be made.

Nachfolgend wird ein bevorzugtes Ausführungsbeispiel eines erfindungsgemäßen Teleskop-Schwingungsdämpfer-Außenrohrs für eine Kraftfahrzeugradaufhängung anhand einer beigefügten schematischen Zeichnung näher erläutert. Es zeigen jeweils in Draufsicht und im Längsschnitt:Hereinafter, a preferred embodiment of a telescopic vibration damper outer tube according to the invention for a Kraftfahrzeugradaufhängung is explained in detail with reference to an accompanying schematic drawing. It shows in plan view and in longitudinal section:

1: Ein Abschnitt eines Außenrohrs eines Teleskop-Schwingungsdämpfers und ein Ventilstutzen jeweils als Einzelteil vor dem Reibschweißvorgang in Position zum Zusammenfügen und 1 : A section of an outer tube of a telescopic vibration damper and a valve stub each as an individual part before the friction welding in position for joining and

2: Den Außenrohrabschnitt des Teleskop-Schwingungsdämpfers mit dem Ventilstutzen aus 1, einstückig zusammengefügt durch die Reibschweißung. 2 : Disconnect the outer tube section of the telescopic damper with the valve stub 1 , assembled in one piece by friction welding.

Es ist in jeder Figur jeweils ein Außenrohr 1 eines Teleskopschwingungsdämpfers für Kraftfahrzeuge aus einer Leichtmetalllegierung teilweise im Bereich eines Ventilstutzens 2 dargestellt, der durch Reibschweißen am Außenrohr 1 befestigt wird. 1 zeigt die Position von Außenrohr 1 und Ventilstutzen 2 vor dem Reibschweißen und 2 die Position danach. Der Ventilstutzen 2, ebenfalls aus einer Leichtmetalllegierung, dient zum Einsetzen eines nicht gezeichneten Bypassventils zur Veränderung der Dämpfkraft des Schwingungsdämpfers.It is an outer tube in each figure 1 a telescopic vibration damper for motor vehicles made of a light metal alloy partially in the range of a valve stub 2 represented by friction welding on the outer tube 1 is attached. 1 shows the position of outer tube 1 and valve stub 2 before friction welding and 2 the position afterwards. The valve stub 2 , also made of a light metal alloy, is used for inserting a not shown bypass valve for changing the damping force of the vibration damper.

Das Außenrohr 1 besitzt für jeden Ventilstutzen 2 bzw. jedes Bypassventil eine radial gerichtete Öffnung 3, die mit einem gegenüber dem Umfang des Außenrohres 1 in radialer Richtung erhabenen ebenen Öffnungsrand 4 umgeben ist. Beim Reibschweißen wird der in Drehung versetzte Ventilstutzen 2, mit einer zu seiner Längsachse 7 rechtwinklig, eben abgeschnittenen, kreiszylindrischen Wandung 5, die mit dem Öffnungsrand 4 des Außenrohrs 1 so korrespondiert, dass dieser deren Oberfläche abdeckt, koaxial hin auf den Öffnungsrand 4 des Außenrohrs 1 zugestellt und es bildet sich bei Berührung eine nicht gezeichnete Reibschweißnaht aus aufgeschmolzenem Material zwischen Ventilstutzen 2 und Außenrohr 1. The outer tube 1 owns each valve neck 2 or each bypass valve a radially directed opening 3 with one opposite the circumference of the outer tube 1 in the radial direction raised planar opening edge 4 is surrounded. During friction welding, the valve stub is set in rotation 2 , with one to its longitudinal axis 7 right-angled, just cut off, circular-cylindrical wall 5 that with the opening edge 4 of the outer tube 1 so corresponds that it covers its surface, coaxial towards the opening edge 4 of the outer tube 1 delivered and it forms on contact a not shown friction weld of molten material between valve stub 2 and outer tube 1 ,

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • DE 10033060 B4 [0002] DE 10033060 B4 [0002]
  • DE 3939012 C2 [0002] DE 3939012 C2 [0002]

Claims (4)

Teleskop-Schwingungsdämpfer mit veränderbarer Dämpfkraft, mit einem Außenrohr (1) aus einer Leichtmetalllegierung, an dem über wenigstens einen Ventilstutzen (2) wenigstens ein Bypassventil angebracht ist, dadurch gekennzeichnet, dass der Ventilstutzen (2) aus einer Leichtmetalllegierung besteht und durch eine Reibschweißverbindung stoffschlüssig mit dem Außenrohr (1) verbunden ist.Telescopic vibration damper with variable damping force, with an outer tube ( 1 ) of a light metal alloy, on which at least one valve stub ( 2 ) at least one bypass valve is mounted, characterized in that the valve stub ( 2 ) consists of a light metal alloy and by a Reibschweißverbindung cohesively with the outer tube ( 1 ) connected is. Teleskop-Schwingungsdämpfer nach Anspruch 1, dadurch gekennzeichnet, dass das Außenrohr (1) für jedes Bypassventil eine radial gerichtete Öffnung (3) besitzt, die mit einem gegenüber dem Umfang des Außenrohres (1) in radialer Richtung erhabenen ebenen Öffnungsrand (4) umgeben ist.Telescopic vibration damper according to claim 1, characterized in that the outer tube ( 1 ) for each bypass valve a radially directed opening ( 3 ), which with a relative to the circumference of the outer tube ( 1 ) in the radial direction raised planar opening edge ( 4 ) is surrounded. Teleskop-Schwingungsdämpfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Ventilstutzen (2) eine zu seiner Längsachse (7) rechtwinklig, eben abgeschnittene kreiszylindrische Wandung (5) besitzt, die mit dem Öffnungsrand (4) des Außenrohrs (1) so korrespondiert, dass dieser deren Oberfläche abdeckt.Telescopic vibration damper according to claim 1 or 2, characterized in that the valve stub ( 2 ) one to its longitudinal axis ( 7 ) rectangular, just cut circular cylindrical wall ( 5 ), which with the opening edge ( 4 ) of the outer tube ( 1 ) so that it covers its surface. Verfahren zur Herstellung eines Teleskop-Schwingungsdämpfers nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass durch koaxiales Zustellen des sich drehenden Ventilstutzens (2) hin auf den Öffnungsrand (4) des Außenrohrs (1) eine Reibschweißnaht zwischen Ventilstutzen (2) und Außenrohr (1) gebildet wird.Method for producing a telescopic vibration damper according to one of claims 1 to 3, characterized in that by coaxial delivery of the rotating valve stub ( 2 ) towards the opening edge ( 4 ) of the outer tube ( 1 ) a friction weld between valve stub ( 2 ) and outer tube ( 1 ) is formed.
DE102011087595A 2011-12-01 2011-12-01 Telescopic vibration damper for wheel suspension of motor car, has valve connecting portion that is made of light metal alloy, mounted with bypass valve and connected by friction welding with outer tube Withdrawn DE102011087595A1 (en)

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DE102011087595A DE102011087595A1 (en) 2011-12-01 2011-12-01 Telescopic vibration damper for wheel suspension of motor car, has valve connecting portion that is made of light metal alloy, mounted with bypass valve and connected by friction welding with outer tube

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DE102011087595A DE102011087595A1 (en) 2011-12-01 2011-12-01 Telescopic vibration damper for wheel suspension of motor car, has valve connecting portion that is made of light metal alloy, mounted with bypass valve and connected by friction welding with outer tube

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036189A1 (en) * 2013-09-12 2015-03-19 Endress+Hauser Flowtec Ag Measuring tube for an ultrasonic flow measuring device and ultrasonic flow measuring device
US20180001571A1 (en) * 2016-07-01 2018-01-04 Lenlok Holdings, Llc Fluid system and method of manufacture via friction welding

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939012C2 (en) 1989-11-25 1991-08-29 Boge Ag, 5208 Eitorf, De
DE4022303A1 (en) * 1990-07-13 1992-01-16 Knorr Bremse Ag Friction welded joint between hose attachments and cylinder - provides space to accommodate weld bead
DE4114307A1 (en) * 1991-05-02 1992-11-05 Fichtel & Sachs Ag VIBRATION DAMPER
DE19542502A1 (en) * 1995-11-15 1997-05-22 Kuka Schweissanlagen & Roboter Method of joining workpieces by friction welding
JP2003049886A (en) * 2001-08-02 2003-02-21 Showa Corp Welding burr falling preventing structure for hydraulic shock absorber
DE10033060B4 (en) 2000-07-07 2004-06-03 Stabilus Gmbh Method for producing a cylinder with a bottom closed at the end
DE102010024365A1 (en) * 2009-10-25 2011-04-28 Andreas Dr. Lenzing Vibration damper for motor vehicle, has cylindrical housing and fastening unit connected with each other, where cylindrical housing is formed as damper pipe and extruded from light alloy
JP2011102634A (en) * 2009-11-12 2011-05-26 Nippon Light Metal Co Ltd Damper and outer shell for damper

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3939012C2 (en) 1989-11-25 1991-08-29 Boge Ag, 5208 Eitorf, De
DE4022303A1 (en) * 1990-07-13 1992-01-16 Knorr Bremse Ag Friction welded joint between hose attachments and cylinder - provides space to accommodate weld bead
DE4114307A1 (en) * 1991-05-02 1992-11-05 Fichtel & Sachs Ag VIBRATION DAMPER
DE19542502A1 (en) * 1995-11-15 1997-05-22 Kuka Schweissanlagen & Roboter Method of joining workpieces by friction welding
DE10033060B4 (en) 2000-07-07 2004-06-03 Stabilus Gmbh Method for producing a cylinder with a bottom closed at the end
JP2003049886A (en) * 2001-08-02 2003-02-21 Showa Corp Welding burr falling preventing structure for hydraulic shock absorber
DE102010024365A1 (en) * 2009-10-25 2011-04-28 Andreas Dr. Lenzing Vibration damper for motor vehicle, has cylindrical housing and fastening unit connected with each other, where cylindrical housing is formed as damper pipe and extruded from light alloy
JP2011102634A (en) * 2009-11-12 2011-05-26 Nippon Light Metal Co Ltd Damper and outer shell for damper

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036189A1 (en) * 2013-09-12 2015-03-19 Endress+Hauser Flowtec Ag Measuring tube for an ultrasonic flow measuring device and ultrasonic flow measuring device
US9574926B2 (en) 2013-09-12 2017-02-21 Endress + Hauser Flowtec Ag Measuring tube for a flow measuring device and flow measuring device
US20180001571A1 (en) * 2016-07-01 2018-01-04 Lenlok Holdings, Llc Fluid system and method of manufacture via friction welding
US10850451B2 (en) * 2016-07-01 2020-12-01 Lenlok Holdings, Llc Fluid system and method of manufacture via friction welding

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