DE19808698A1 - Automotive shock absorber with differential characteristics - Google Patents

Automotive shock absorber with differential characteristics

Info

Publication number
DE19808698A1
DE19808698A1 DE1998108698 DE19808698A DE19808698A1 DE 19808698 A1 DE19808698 A1 DE 19808698A1 DE 1998108698 DE1998108698 DE 1998108698 DE 19808698 A DE19808698 A DE 19808698A DE 19808698 A1 DE19808698 A1 DE 19808698A1
Authority
DE
Germany
Prior art keywords
piston
piston rod
adjusting element
shaft
positive connection
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Withdrawn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
DE1998108698
Other languages
German (de)
Inventor
Jens-Uwe Schreiber
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.)
SCHREIBER JENS UWE
Original Assignee
SCHREIBER JENS UWE
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 SCHREIBER JENS UWE filed Critical SCHREIBER JENS UWE
Priority to DE1998108698 priority Critical patent/DE19808698A1/en
Publication of DE19808698A1 publication Critical patent/DE19808698A1/en
Withdrawn legal-status Critical Current

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
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/516—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics resulting in the damping effects during contraction being different from the damping effects during extension, i.e. responsive to the direction of movement
    • 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
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
    • F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
    • F16F9/464—Control of valve bias or pre-stress, e.g. electromagnetically

Abstract

The automotive shock absorber has different dampening characteristics under tension and compression, and a shaft (12), at the bottom of which, one adjuster piece (14) is linked to a piston (2) and adjuster element (11). When the shock absorber is adjusted for tension, rotation of the shaft acts upon a spring (10) and valve disc (9), regulating the flow of hydraulic fluid through an aperture (6). The shaft may be disengaged from the first adjuster piece and engaged with a second adjuster piece (13) to regulate the compression dampening characteristics.

Description

Es ist bekannt, daß Stoßdämpfer in Druck- und Zugstufe regelbar sind (Patent-Nr. 4019221, PD960814).It is known that shock absorbers can be regulated in the compression and rebound stages (Patent No. 4019221, PD960814).

Um im Automobil- und Rennsportbereich bei Stoßdämpfern die Druck- und Zugkräfte im eingebauten Zustand separat regeln zu können, ist weiterhin bekannt, daß hierzu aufwendige mechanische oder elektrische Konstruktionen nötig sind, wie (z. B. im o. g. Patent) zwei ineinander­ laufende drehbare Wellen, die koaxial durch die Kolbenstange verlaufen, oder (z. B. im Patent-Nr. 3736695, PD950323) die Verstelleinrichtung über Magnetsysteme reagiert.In order to reduce the pressure and shock absorbers in the automotive and racing sectors It must be possible to regulate tensile forces separately when installed further known that this involves complex mechanical or electrical Constructions are necessary, such as (e.g. in the above patent) two in one another running rotatable shafts that run coaxially through the piston rod, or (e.g. in Patent No. 3736695, PD950323) the adjustment device reacted via magnet systems.

Diese Konstruktionen sind meist zu kostenintensiv und störanfällig und benötigen mehr als eine Verstelleinrichtung.These designs are usually too expensive and prone to failure and require more than one adjustment device.

Der in den Patentansprüchen angegebenen Erfindung liegt das Problem zugrunde, Druck- und Zugkräfte unabhängig voneinander mit nur einer Verstelleinrichtung mechanisch regeln zu können, und somit eine einfache Bedienung zu erreichen.The problem specified in the claims is the invention based on compressive and tensile forces independently of one another To be able to mechanically regulate the adjustment device, and thus one easy to achieve.

Dieses Problem wird durch die in den Patentansprüchen aufgeführten Merkmale gelöst.This problem is addressed by those listed in the claims Features resolved.

Die mit der Erfindung erzielten Vorteile bestehen darin, daß der Stoßdämpfer über nur eine Verstelleinrichtung in allen Regelfunktionen, wie Änderung der Zug- bzw. Druckkräfte unabhängig voneinander von außen bedienbar ist, und das aufwendige kostenintensive Konstruktionen, die evtl. auch störanfälliger sind vermieden werden.The advantages achieved by the invention are that Shock absorbers with only one adjustment device in all control functions, how to change the tensile or compressive forces independently of each other is operated from the outside, and the complex cost-intensive constructions, which may also be more susceptible to failure.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown in the drawing and is described in more detail below.

Es zeigtIt shows

Fig. 1 ein Schnittschema eines Stoßdämpfers, mit der Besonderheit, daß koaxial durch Kolbenstange (3) und Ventilbaugruppe (2) eine drehbare und verschiebbare Welle (12) hindurch angeordnet ist. Fig. 1 is a sectional diagram of a shock absorber, with the special feature that a rotatable and displaceable shaft ( 12 ) is arranged coaxially through the piston rod ( 3 ) and valve assembly ( 2 ).

ZugrichtungDirection of pull

Beim Herausziehen der Welle (12) geht deren unteres Verstellstück (14) eine formschlüssige Verbindung mit einem am Kolben (2) schraubbar angebrachten Verstellelement (11) ein, das durch Drehen der Welle eine durch eine Feder (10) beaufschlagte Ventilscheibe (9) beeinflußt, und die Durchflußmenge des Dämpfungsmittels durch die Durchflußbohrungen (6) regelt.When the shaft ( 12 ) is pulled out, its lower adjusting piece ( 14 ) enters into a positive connection with an adjusting element ( 11 ) which can be screwed onto the piston ( 2 ) and which, by rotating the shaft, influences a valve disk ( 9 ) acted upon by a spring ( 10 ) , and regulates the flow rate of the damping agent through the flow bores ( 6 ).

DruckrichtungPrinting direction

Beim Hineindrücken der Welle (12) entriegelt das Verstellstück (14) und hat damit keine weitere Funktion. Jedoch ein zweites an der Welle (12) angebrachtes Verstellstück (13) geht eine formschlüssige Verbindung mit dem Kolben (2) ein, folglich beim Drehen der Welle (12) der Kolben (2) eine Veränderung der Federkraft der Feder (8) auf die Ventilscheibe (7) bewirkt, und damit die Durchflußmenge des Dämpfungsmittels durch die Durchflußbohrungen (6) regelt.When the shaft ( 12 ) is pushed in, the adjusting piece ( 14 ) unlocks and therefore has no further function. However, a second adjusting piece ( 13 ) attached to the shaft ( 12 ) forms a positive connection with the piston ( 2 ), consequently, when the shaft ( 12 ) rotates, the piston ( 2 ) changes the spring force of the spring ( 8 ) Valve disc ( 7 ), and thus regulates the flow rate of the damping agent through the flow bores ( 6 ).

Weiterhin wird bei eingedrückter Welle durch ein Raster (18) ein selbständiges Verstellen des Kolbens in der Kolbenstange vermieden. Der wichtigste Vorteil ist, daß die Druck- und Zugstufe unabhängig voneinander mit nur einer Verstelleinrichtung regelbar sind. Desweiteren ist ein robuster wenig störungsanfälliger und kostengünstiger Aufbau möglich.Furthermore, when the shaft is pressed in, a grid ( 18 ) prevents the piston from being adjusted independently in the piston rod. The most important advantage is that the compression and rebound can be regulated independently of one another with only one adjustment device. Furthermore, a robust, less prone to failure and inexpensive construction is possible.

Claims (8)

Stoßdämpfer, der in Druck- und Zugstufe separat regelbar ist mit einem Hohlzylinder (1), der mit Fluid oder Fluid-Gas- Mischung gefüllt ist;
einem Kolben (2), der den Zylinder in zwei Arbeitsbereiche (A, B) teilt wobei der Kolben mit einer Kolbenstange (3) verbunden ist die die Zug- und Druckkräfte auf diesen überträgt;
einem inneren (4) und einem äußeren (5) ringförmig ausgebildeten Kanal, der auf jeder der beiden Stirnflächen des Kolbens deckungsgleich verläuft und Durchflußbohrungen (6) aufweist, um beide Arbeitsbereiche (A, B) zu verbinden;
einer ersten Ventilscheibe (7), die auf der der Kolbenstange zugewandten Seite des Kolbens den äußeren ringförmigen Kanal (5) abdeckt, und bei der Einhubbewegung des Kolbens in Abhängigkeit des Druckes des komprimierten Arbeitsbereiches gegen eine rückstellende Feder (8), die an der Ventilscheibe (7) sowie der unteren Stirnfläche der Kolbenstange anliegt, öffnet
einer zweiten Ventilscheibe (9), die auf der der Kolbenstange abgewandten Stirnseite des Kolbens den inneren ringförmigen Kanal (4) abdeckt und bei der Aushubbewegung des Kolbens in Ab­ hängigkeit des Druckes des komprimierten Arbeitsbereiches gegen eine rückstellende Feder (10), die an der Ventilscheibe (9) sowie an einem Verstellelement (11), das am Kolben veränderlich angebracht ist anliegt, öffnet; dadurch gekennzeichnet,Shock absorber, which is separately adjustable in compression and rebound, with a hollow cylinder ( 1 ) which is filled with a fluid or fluid-gas mixture;
a piston ( 2 ) which divides the cylinder into two working areas (A, B), the piston being connected to a piston rod ( 3 ) which transmits the tensile and compressive forces thereon;
an inner ( 4 ) and an outer ( 5 ) annular channel which is congruent on each of the two end faces of the piston and has through-flow bores ( 6 ) to connect the two working areas (A, B);
a first valve disk ( 7 ), which covers the outer annular channel ( 5 ) on the side of the piston facing the piston rod, and during the lifting movement of the piston depending on the pressure of the compressed working area against a restoring spring ( 8 ) on the valve disk ( 7 ) and the lower end face of the piston rod opens
a second valve disc ( 9 ) which on the end of the piston facing away from the piston rod covers the inner annular channel ( 4 ) and during the excavation movement of the piston depending on the pressure of the compressed working area against a restoring spring ( 10 ) on the valve disc ( 9 ) as well as on an adjusting element ( 11 ) which is variably attached to the piston, opens; characterized, - daß der Kolben (2) veränderlich in der Kolbenstange (3) eingeschraubt ist und ein Aufnahmestück (15) für einen Verstellmechanismus besitzt- That the piston ( 2 ) is variably screwed into the piston rod ( 3 ) and has a receiving piece ( 15 ) for an adjustment mechanism - daß eine drehbare und verschiebbare Welle (12) in koaxialer An­ ordnung durch Kolbenstange, Kolben, Ventilscheiben, Federn und den am Kolben angebrachten Verstellelement hindurchgeht und mit zwei Elementen (13, 14) versehen ist, die eine formschlüssige Verbindung einerseits mit dem am Kolben befindlichen Aufnahme­ stück (15), andererseits mit dem Verstellelement (11) am Kolben ermöglicht- That a rotatable and displaceable shaft ( 12 ) in a coaxial arrangement through the piston rod, piston, valve discs, springs and the adjusting element attached to the piston passes through and is provided with two elements ( 13 , 14 ) which provide a positive connection on the one hand with that on the piston located recording piece ( 15 ), on the other hand with the adjusting element ( 11 ) on the piston allows - daß die drehbare und verschiebbare Welle (12) beim Hineindrücken mit dem Element (13) eine formschlüssige Verbindung mit dem am Kolben befindlichen Gegenstück (15) eingeht und durch Drehen derselben der Kolben (2) im Gewinde (17) der Kolbenstange (3) seine Lage ändert und somit der Druck der Feder (8) zwischen Ventilscheibe (7) und Stirnfläche der Kolbenstange sich verändert und somit die Kraft die dem Fluidstrom in der Einhubrichtung entgegenwirkt, steuerbar ist und;- That the rotatable and displaceable shaft ( 12 ) when pressed in with the element ( 13 ) enters into a positive connection with the counterpart located on the piston ( 15 ) and by turning the piston ( 2 ) in the thread ( 17 ) of the piston rod ( 3 ) its position changes and thus the pressure of the spring ( 8 ) between the valve disc ( 7 ) and the end face of the piston rod changes and thus the force which counteracts the fluid flow in the lifting direction is controllable and; - daß die drehbare und verschiebbare Welle (12) beim Herausziehen mit einem Element (14) eine formschlüssige Verbindung mit dem am Kolben veränderlich angebrachten Verstellelement (11) eingeht und durch Drehen derselben das Verstellelement seine Lage ändert und somit der Federdruck (10) zwischen Ventilscheibe (9) und Verstellelement (11) sich ändert folglich die Kraft, die dem Fluidstrom in der Aushubrichtung entgegenwirkt, steuerbar ist und;- That the rotatable and displaceable shaft ( 12 ) when pulled out with an element ( 14 ) a positive connection with the variably mounted on the piston adjusting element ( 11 ) is received and by turning the same the adjusting element changes its position and thus the spring pressure ( 10 ) between the valve disc ( 9 ) and adjusting element ( 11 ) consequently changes the force which counteracts the fluid flow in the direction of excavation, is controllable and; - daß durch Hineindrucken oder Herausziehen der Welle (12) jeweils nur eine formschlüssige Verbindung entsteht;- That by pushing in or pulling out the shaft ( 12 ) only a positive connection arises; - daß beide Verstellmöglichkeiten miteinander nicht in Wechselwirkung treten;- That both adjustment options do not interact with each other to step; - daß ein Raster (18) das selbständige Verstellen verhindert.- That a grid ( 18 ) prevents independent adjustment.
DE1998108698 1998-03-11 1998-03-11 Automotive shock absorber with differential characteristics Withdrawn DE19808698A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1998108698 DE19808698A1 (en) 1998-03-11 1998-03-11 Automotive shock absorber with differential characteristics

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1199492A1 (en) * 2000-10-20 2002-04-24 Krupp Bilstein GmbH Working piston for a hydraulic shock absorber and method for the production thereof
EP1281888A2 (en) * 2001-08-04 2003-02-05 ThyssenKrupp Bilstein GmbH Hydraulic shock absorber
DE10223556C1 (en) * 2002-05-28 2003-09-25 Thyssen Krupp Bilstein Gmbh Automobile hydraulic shock absorber has adjustable bypass device of variable cross-section with side outlets controlled by respective rotary sliders
DE10326415A1 (en) * 2003-06-12 2004-09-16 Thyssenkrupp Bilstein Gmbh Axial adjustment unit for hydraulic shock absorber used in e.g. sports vehicles, includes components interlocking in two different axial positions
EP1662172A1 (en) * 2004-11-30 2006-05-31 Jean-Joseph Willé Hydraulic shock absorber
ITTO20100676A1 (en) * 2010-08-04 2012-02-05 Sistemi Sospensioni Spa PISTON FOR SHOCK ABSORBER WITH VARIABLE DAMPING, PARTICULARLY FOR SUSPENSION OF VEHICLE, PROVIDED WITH FOUR PASSIVE VALVES OF FLOW CONTROL AND OF A FLOW RETURN ELECTROVALVE
ITTO20100675A1 (en) * 2010-08-04 2012-02-05 Sistemi Sospensioni Spa PISTON FOR SHOCK ABSORBER WITH VARIABLE DAMPING, PARTICULARLY FOR SUSPENSION OF VEHICLE, PROVIDED WITH FOUR PASSIVE VALVES OF FLOW CONTROL AND OF A FLOW RETURN ELECTROVALVE
DE102010049828A1 (en) * 2010-10-27 2012-05-03 Zf Friedrichshafen Ag Vibration damper with amplitude-selective damping force
DE102012204037B3 (en) * 2012-03-15 2013-09-05 Zf Friedrichshafen Ag Adjustable vibration damper, has cylinder, in which piston rod carrying piston is axially guided, and damping valve body, which is flowed through in two directions, where pressure compensation opening is equipped with check valve
WO2015045732A1 (en) * 2013-09-30 2015-04-02 株式会社ショーワ Pressure shock absorbing device and damping force generating mechanism
JP2015068472A (en) * 2013-09-30 2015-04-13 株式会社ショーワ Pressure buffer device and damping force generating mechanism
JP2015183782A (en) * 2014-03-25 2015-10-22 株式会社ショーワ Pressure buffering device and damping force generation mechanism
JP2015183781A (en) * 2014-03-25 2015-10-22 株式会社ショーワ Pressure buffering device, and damping force generation mechanism

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1199492A1 (en) * 2000-10-20 2002-04-24 Krupp Bilstein GmbH Working piston for a hydraulic shock absorber and method for the production thereof
EP1281888A2 (en) * 2001-08-04 2003-02-05 ThyssenKrupp Bilstein GmbH Hydraulic shock absorber
EP1281888A3 (en) * 2001-08-04 2004-03-10 ThyssenKrupp Bilstein GmbH Hydraulic shock absorber
DE10223556C1 (en) * 2002-05-28 2003-09-25 Thyssen Krupp Bilstein Gmbh Automobile hydraulic shock absorber has adjustable bypass device of variable cross-section with side outlets controlled by respective rotary sliders
DE10326415A1 (en) * 2003-06-12 2004-09-16 Thyssenkrupp Bilstein Gmbh Axial adjustment unit for hydraulic shock absorber used in e.g. sports vehicles, includes components interlocking in two different axial positions
EP1662172A1 (en) * 2004-11-30 2006-05-31 Jean-Joseph Willé Hydraulic shock absorber
US9016447B2 (en) 2010-08-04 2015-04-28 Sistemi Sospensioni S.P.A. Piston for a damping-adjustable shock-absorber, particularly for a vehicle suspension, provided with four passive flow-control valves and with a flow-dividing solenoid valve
ITTO20100676A1 (en) * 2010-08-04 2012-02-05 Sistemi Sospensioni Spa PISTON FOR SHOCK ABSORBER WITH VARIABLE DAMPING, PARTICULARLY FOR SUSPENSION OF VEHICLE, PROVIDED WITH FOUR PASSIVE VALVES OF FLOW CONTROL AND OF A FLOW RETURN ELECTROVALVE
WO2012017050A1 (en) * 2010-08-04 2012-02-09 Sistemi Sospensioni S.P.A. Piston for a damping-adjustable shock-absorber, particularly for a vehicle suspension, provided with four passive flow-control valves and with a flow-dividing solenoid valve
CN103154561B (en) * 2010-08-04 2015-09-02 悬挂系统股份有限公司 For vehicle suspension damping-adjustable shock-absorber, there are four flow control passive valve and have shunting solenoid valve piston
ITTO20100675A1 (en) * 2010-08-04 2012-02-05 Sistemi Sospensioni Spa PISTON FOR SHOCK ABSORBER WITH VARIABLE DAMPING, PARTICULARLY FOR SUSPENSION OF VEHICLE, PROVIDED WITH FOUR PASSIVE VALVES OF FLOW CONTROL AND OF A FLOW RETURN ELECTROVALVE
CN103154561A (en) * 2010-08-04 2013-06-12 悬挂系统股份有限公司 Piston for a damping-adjustable shock-absorber, particularly for a vehicle suspension, provided with four passive flow-control valves and with a flow-dividing solenoid valve
DE102010049828B4 (en) * 2010-10-27 2012-05-31 Zf Friedrichshafen Ag Vibration damper with amplitude-selective damping force
DE102010049828A1 (en) * 2010-10-27 2012-05-03 Zf Friedrichshafen Ag Vibration damper with amplitude-selective damping force
DE102012204037B3 (en) * 2012-03-15 2013-09-05 Zf Friedrichshafen Ag Adjustable vibration damper, has cylinder, in which piston rod carrying piston is axially guided, and damping valve body, which is flowed through in two directions, where pressure compensation opening is equipped with check valve
WO2015045732A1 (en) * 2013-09-30 2015-04-02 株式会社ショーワ Pressure shock absorbing device and damping force generating mechanism
JP2015068472A (en) * 2013-09-30 2015-04-13 株式会社ショーワ Pressure buffer device and damping force generating mechanism
CN105579736A (en) * 2013-09-30 2016-05-11 株式会社昭和 Pressure shock absorbing device and damping force generating mechanism
CN105579736B (en) * 2013-09-30 2017-06-20 株式会社昭和 Pressure buffer and damping force generation mechanism
US10029530B2 (en) 2013-09-30 2018-07-24 Showa Corporation Pressure damper and damping force generation mechanism
JP2015183782A (en) * 2014-03-25 2015-10-22 株式会社ショーワ Pressure buffering device and damping force generation mechanism
JP2015183781A (en) * 2014-03-25 2015-10-22 株式会社ショーワ Pressure buffering device, and damping force generation mechanism

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