WO2016193211A1 - Amortisseur de vibrations à butée de traction - Google Patents

Amortisseur de vibrations à butée de traction Download PDF

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Publication number
WO2016193211A1
WO2016193211A1 PCT/EP2016/062164 EP2016062164W WO2016193211A1 WO 2016193211 A1 WO2016193211 A1 WO 2016193211A1 EP 2016062164 W EP2016062164 W EP 2016062164W WO 2016193211 A1 WO2016193211 A1 WO 2016193211A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston rod
insert part
stop
rod guide
receptacle
Prior art date
Application number
PCT/EP2016/062164
Other languages
German (de)
English (en)
Inventor
Michael Fritz
Original Assignee
Thyssenkrupp Bilstein Gmbh
Thyssenkrupp Ag
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 Thyssenkrupp Bilstein Gmbh, Thyssenkrupp Ag filed Critical Thyssenkrupp Bilstein Gmbh
Publication of WO2016193211A1 publication Critical patent/WO2016193211A1/fr

Links

Classifications

    • 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
    • F16F9/58—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
    • F16F9/585—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder within the cylinder, in contact with working fluid

Definitions

  • the invention relates to a vibration damper having the features of the preamble of patent claim 1.
  • Such a vibration damper is known from document EP 1 544 499 B1.
  • a vibration damper is described with a stop acting in the pulling direction (ie, in the direction of an extension movement of the piston rod out of the damper tube) (also referred to as “pull stop” for short) .
  • the movements of the piston rod are guided by the piston rod guide via a guide surface enclosing the piston rod
  • the stop stop comprises a stop ring located on the piston rod and a stop shoulder provided on the piston rod guide
  • the stop stop is used, on the one hand, to limit an extension movement of the piston rod out of the damper tube (a so - called rebound stroke of the piston rod) This function is described in EP 1 544 499 Bl referred to as "stroke limitation”.
  • EP 1 544 499 B1 proposes that the piston rod guide between the stop shoulder and the guide surface has an annular deformation zone with a recess which, in the event of overloading, permits deformation of the stop shoulder while absorbing axial forces. A plastic deformation of the stop shoulder in case of overload is therefore deliberately accepted in the subject matter of EP 1 544 499 B1.
  • deformations and settlements which the stop ring leaves on the piston rod guide are referred to as "unavoidable” in EP 1 544 499 B1 (cf, paragraph [0008].)
  • the deformation zone is intended to protect the guide surface against deformations and settling phenomena In order to achieve this, the deformation zone should absorb the plastic deformations of the stop shoulder, as stated in paragraph [0008]: "In particular, those in continuous operation are avoidable settlements or deformations, which leaves the stop ring on the piston rod guide, absorbed and absorbed by the stop shoulder. "
  • the present invention is based on the object, a vibration damper of the type mentioned in such a way that damage to the piston rod surface is effectively avoided even at very high impact forces.
  • the piston rod guide has a base body made of sintered metal, which has a receptacle for the insert part, wherein the insert part is inserted into the receptacle and connected to the base body, wherein the insert part at least in the area in which it from a certain extension path the piston rod comes into contact with the stop ring, comprising a material having a higher yield point R p o i2 and a higher tensile strength R m than the sintered metal of the main body.
  • the present invention thus proposes to form the piston rod guide from elements which consist of different materials.
  • the measure according to the invention that the main body and the insert part have different materials, allows the designer to optimally adapt these components by appropriate choice of materials to the particular requirements that are placed on these components.
  • the main body is made of sintered metal and can therefore be produced inexpensively by a sintering process.
  • the sintering process allows both the guide surface for guiding the piston rod movements and the receptacle required for the insert part to be easily and without additional operations such as e.g. To provide machining operations on or in the body.
  • the sintered metallic material of the base body has a certain elasticity, so that the piston rod guide is not altogether too rigid.
  • the insert part has a material which has a higher yield strength R p0i 2 and a higher tensile strength R m than the sintered metal of the main body.
  • the targeted selection of a material for the insert with a significantly higher yield strength and tensile strength ensures that the insert does not plastically deform even with very large impact forces.
  • the solution according to EP 1 544 499 B1 fundamentally differs from the solution approach of the present invention, so that EP 1 544 499 B1 points in a completely different direction than the present invention.
  • the insert part consists of a hard metal, e.g. from 42CrMo4. This has the advantage that is achieved by the targeted selection of a material for the insert with a significantly higher yield strength and tensile strength than the material of the body that the insert does not plastically deform even with very large impact forces.
  • the insert part is formed as an annular element which is inserted into the receptacle of the base body and connected to the base body.
  • the insert part may be connected in different ways with the base body, in particular, the insert part with the main body form a non-positive / positive and / or a cohesive connection.
  • the insert can be pressed into a cylindrically shaped receptacle of the body, glued, soldered or welded.
  • the diameter of the annular insert part in relation to the cylindrical receptacle of the main body is dimensioned such that the insert part forms an at least frictional connection with the main body. per is pressed into the receptacle.
  • the material characteristic flow limit R p o i2 and tensile strength R m of the insert part are greater than the corresponding material properties of the piston rod material. This means that the said material characteristic values of the material of the insert part in this embodiment not only relative to the material values of the main body of the piston rod guide are selected, but also relative to the material values of the piston rod material. This ensures that no deformations of the insert occur even at high impact forces, which can lead to a leak or malfunction due to increased piston rod friction.
  • Figure 1 shows a vibration damper according to the invention in an axial half section in an engaged position of the stopper ring 4 with the piston rod guide 3;
  • a vibration damper according to the invention is shown in axial half section.
  • the damper tube 1 receives a reciprocating in the damper tube 1 in the axial direction piston rod 2.
  • a working piston 10 is arranged on the piston rod 2, a working piston 10 is arranged.
  • the working piston 10 divides the interior of the damper tube 1 in a piston rod-side working space 11 and a piston rod remote working space 12.
  • the piston rod side working space 12 is closed by a piston rod guide 3, which is connected to the damper tube 1.
  • the piston rod 2 is guided in its oscillating entry and exit movement in the damper tube 1.
  • a stop ring 4 is arranged, which is designed for example as a snap ring or spring ring.
  • the stop ring 4 is inserted into a receiving groove 13 provided in the piston rod 2. From a certain Ausfahrweg by which the piston rod 2 is extended from the damper tube 1, the stop ring 4 enters into contact with the piston rod guide. 3 Fig. 1 shows the situation in which the stop ring 4 comes into contact with the piston rod guide 3.
  • the piston rod guide 3 comprises a base body 7, which is made, for example, of a sintered metal as a sintered component.
  • the main body 7 has a receptacle 8 for a stop element 5.
  • the stop element 5 is formed as an insert 6, that is, it is inserted into the receptacle 8.
  • the stop element 5 is firmly connected to the base body 7.
  • the fixed connection between the stop element 5 and the main body 7 can be achieved by pressing the stop element 5 into the receptacle 8.
  • the stop element is annular and the receptacle 8 has a cylindrical cross-section.
  • the diameter of the receptacle 8 and the outer diameter of the annular stop element 5 are coordinated so that there is a diameter coverage, the leads to a sufficiently tight interference fit.
  • Alternatives to pressing the stop element 5 into the receptacle 8 are possible.
  • the stop element 5 can also be materially inserted by a welding process, for example, a friction welding process such as rotary friction welding or a beam welding process such as laser beam welding or electron beam welding in the recording.
  • a welding process for example, a friction welding process such as rotary friction welding or a beam welding process such as laser beam welding or electron beam welding in the recording.
  • the stop element 5 is integrally inserted by an adhesive bond or a solder joint in the receptacle 8 and thereby firmly connected to the piston rod guide 3.
  • the main body 7 of the piston rod guide 3 is made of a sintered metal material, for example of sintered steel Sint-Cl l as a sintered component.
  • This material has a yield point R p o i2 of 290 MPa and a tensile strength R m of 390 MPa.
  • the elongation at break, d .h. the elongation A occurring up to a fraction of the sample is 1% for this material.
  • the stop element 5 consists of the steel material 42CrMo4. This material has a yield point R p o , 2 of 750 MPa and a tensile strength R m of 1100 MPa.
  • the elongation at break A is 11% for this material.
  • the material WNB 791 A2 is used in the concrete embodiment. This material has a yield strength R p o i2 of 500 MPa, a tensile strength R m of 775 MPa and an elongation at break of 6%.
  • the snap ring consists of the material according to DIN EN 10270-1 or 2 and has a tensile strength R m in the range 1840 MPa to 2040 MPa. LIST OF REFERENCE NUMBERS

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

L'invention concerne un amortisseur de vibrations destiné à des véhicules automobiles, en particulier à des véhicules utilitaires, comportant un tube d'amortisseur (1), une tige de piston (2) pouvant effectuer un mouvement de va-et-vient dans le tube d'amortisseur (1) le long d'un axe longitudinal d'amortisseur. Un guide (3) de tige de piston servant au guidage des mouvements de la tige de piston (2) est agencé au niveau du tube d'amortisseur (1), une bague de butée (4) est agencée au niveau de la tige de piston (2), un élément de butée (5) est agencé au niveau du côté du guide (3) de tige de piston tourné vers la bague de butée (4), l'élément de butée (5) est réalisé sous la forme d'une pièce rapportée (6) et est relié au guide (3) de tige de piston, et la bague de butée (4) entre en contact avec la pièce rapportée (6) à partir d'une course de sortie déterminée lorsque la tige de piston effectue un mouvement de sortie du tube d'amortisseur (1) et limite le mouvement de sortie. L'invention vise à perfectionner un amortisseur de vibrations du type ci-dessus de telle manière qu'un endommagement de la surface de la tige de piston soit efficacement évité, même en présence de forces de butée élevées. À cet effet, le guide (3) de tige de piston présente un corps de base (7) composé d'un métal fritté et présentant un logement (8) pour la pièce rapportée (6), la pièce rapportée (6) est mise en place dans le logement (5) et assemblée au corps de base (7). La pièce rapportée (6) présente, au moins dans la zone dans laquelle elle entre en contact avec la bague de butée (7) à partir d'une course de sortie déterminée de la tige de piston (2), un matériau qui présente une limite d'écoulement Rp0,2 et une résistance à la traction Rm plus élevées que celles du matériau fritté du corps de base (7).
PCT/EP2016/062164 2015-06-01 2016-05-30 Amortisseur de vibrations à butée de traction WO2016193211A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015210078.2A DE102015210078A1 (de) 2015-06-01 2015-06-01 Schwingungsdämpfer mit Zuganschlag
DE102015210078.2 2015-06-01

Publications (1)

Publication Number Publication Date
WO2016193211A1 true WO2016193211A1 (fr) 2016-12-08

Family

ID=56096627

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/062164 WO2016193211A1 (fr) 2015-06-01 2016-05-30 Amortisseur de vibrations à butée de traction

Country Status (2)

Country Link
DE (1) DE102015210078A1 (fr)
WO (1) WO2016193211A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11578777B2 (en) * 2019-10-11 2023-02-14 DRiV Automotive Inc. Sintered metal rod guide assembly for monotube shock absorber
DE202021003747U1 (de) 2021-12-10 2023-03-14 Bümach Engineering International B.V. Arbeitszylinder
CN115716410B (zh) * 2022-11-23 2024-04-12 重庆赛力斯凤凰智创科技有限公司 表显续航里程调整方法、装置、计算机设备和存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733823A1 (fr) * 1995-03-24 1996-09-25 RFT S.p.A. Guidage et joint pour une tige, en particulier une tige d'amortisseur
DE10210713A1 (de) * 2001-08-02 2003-02-13 Showa Corp Saitama Wellendichtungsteil-Aufbau eines hydraulischen Stoßdämpfers und Verfahren zu dessen Zusammenbau
US20040112695A1 (en) * 2002-12-06 2004-06-17 Daido Metal Company Ltd. Hydraulic shock absorber
EP2006569A2 (fr) * 2007-06-20 2008-12-24 Delphi Technologies, Inc. Amortisseur ayant un amortisseur de rebond et sous-ensemble d'amortisseur en étant équipé
EP1544499B1 (fr) 2003-12-16 2009-09-16 AL-KO Kober AG Amortisseur avec bague de butée

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2905928A1 (de) * 1979-02-16 1980-08-28 Fichtel & Sachs Ag Hydropneumatischer zweirohrschwingungsdaempfer mit entlueftungsventil
DE8029322U1 (de) * 1980-11-04 1981-02-26 Boge Gmbh, 5208 Eitorf Vorrichtung zur Abdichtung von quer zu ihrer Achse bewegbaren Kolbenstangen o.dgl
DE4343428A1 (de) * 1993-12-18 1995-06-22 Ringsdorff Sinter Gmbh Spritzgegossene Führungs- und Dichtelemente an Sinterteilen für Stoßdämpfer
DE10026360B4 (de) * 2000-05-27 2015-09-24 Volkswagen Ag Kolbenstangenführung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733823A1 (fr) * 1995-03-24 1996-09-25 RFT S.p.A. Guidage et joint pour une tige, en particulier une tige d'amortisseur
DE10210713A1 (de) * 2001-08-02 2003-02-13 Showa Corp Saitama Wellendichtungsteil-Aufbau eines hydraulischen Stoßdämpfers und Verfahren zu dessen Zusammenbau
US20040112695A1 (en) * 2002-12-06 2004-06-17 Daido Metal Company Ltd. Hydraulic shock absorber
EP1544499B1 (fr) 2003-12-16 2009-09-16 AL-KO Kober AG Amortisseur avec bague de butée
EP2006569A2 (fr) * 2007-06-20 2008-12-24 Delphi Technologies, Inc. Amortisseur ayant un amortisseur de rebond et sous-ensemble d'amortisseur en étant équipé

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Publication number Publication date
DE102015210078A1 (de) 2016-12-01

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