DE2709428A1 - Compression spring vehicle shock absorber - has compression spring inside cylinder, between end plate and piston - Google Patents

Compression spring vehicle shock absorber - has compression spring inside cylinder, between end plate and piston

Info

Publication number
DE2709428A1
DE2709428A1 DE19772709428 DE2709428A DE2709428A1 DE 2709428 A1 DE2709428 A1 DE 2709428A1 DE 19772709428 DE19772709428 DE 19772709428 DE 2709428 A DE2709428 A DE 2709428A DE 2709428 A1 DE2709428 A1 DE 2709428A1
Authority
DE
Germany
Prior art keywords
compression spring
spring
piston
shock absorber
end plate
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.)
Pending
Application number
DE19772709428
Other languages
German (de)
Inventor
Peter Schaefer
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.)
Continental Teves AG and Co oHG
Original Assignee
Alfred Teves 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 Alfred Teves GmbH filed Critical Alfred Teves GmbH
Priority to DE19772709428 priority Critical patent/DE2709428A1/en
Publication of DE2709428A1 publication Critical patent/DE2709428A1/en
Pending 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
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/02—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs damping by frictional contact between the spring and braking means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R19/28—Metallic springs

Landscapes

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

Abstract

Shock absorber comprises a spring cup (1) in which a pressure spring (2) is arranged virtually without play. The spring cup (1) has a base plate (3) for attachment to the vehicle. This locating plate can also be fitted on a tube. In the spring cup (1) is a piston (4) pushing against the pressure spring (2). This piston has a thrust bar attached to it. An alternative version houses a spring with flats on the outside of its coils. When the plunger (4) travels inwards, the power of the pressure spring (2) increases accordingly in a straight line of application.

Description

PralldämpferImpact absorber

Die Erfindung bezieht sich auf einen Praildämpfer, bestehend aus einem eine Druckfeder enthaltenden Federtopf, in den gegen die Kraft der Druckfeder ein Stempel einfahrbar ist.The invention relates to a profile damper, consisting of a a spring cup containing a compression spring, in which a pressure spring counteracts the force of the compression spring Stamp is retractable.

Ein Pralldämpfer der genannten Art ist z.B. durch die Dt-OS 20 64 021 bekannt. Die Druckfeder dieses vorbenannten, für eine Kraftfahrzeugstoßstange vorgesehenen Pralldämpfers dient dazu, bei einem Aufprall Energie aufzunehmen. Um zu verhindern, daß die in der Feder gespeicherte Energie zu einem Zurückprallen des Fahrzeugs nach einem Aufprall führt, ist im Pralldämpfer eine hydraulische Dämpfereinrichtung vorgesehen. Diese hat auch die Aufgabe, beim Aufprall Energie zu vernichten.An impact damper of the type mentioned is e.g. through Dt-OS 20 64 021 known. The compression spring of the aforementioned, for a motor vehicle bumper provided impact absorber is used to absorb energy in the event of an impact. Around to prevent the energy stored in the spring from rebounding of the vehicle after an impact, there is a hydraulic damper device in the impact damper intended. This also has the task of destroying energy in the event of an impact.

Die Praxis hat gezeigt, daß eine hydraulische Dämpfung auf die Kosten für einen Pralldämpfer einen maßgeblichen Einfluß hat. Auch die notwendige Energiespeicherung in den Druckfedern führt zu sehr kräftigen und großen und damit teuren Druckfedern.Practice has shown that hydraulic damping reduces costs has a significant influence on an impact damper. Also the necessary energy storage in the compression springs leads to very strong and large and therefore expensive compression springs.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Praildämpfer der eingangs genannten Art zu entwickeln, der bei möglichst geringen Herstellungskosten und möglichst geringer Baugröße möglichst viel Energie aufnehmen kann.The present invention is based on the object of a profile damper of the type mentioned to develop with the lowest possible manufacturing costs and as small as possible can absorb as much energy as possible.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Druckfeder im Feder topf ohne wesentliches oder ohne radiales Spiel angeordnet ist.This object is achieved according to the invention in that the compression spring is arranged in the spring pot without substantial or without radial play.

Diese auf den ersten Blick unbedeutend erscheinende Xaßnahme führt dazu, daß infolge der beim Einfedern auf tretenden Vergrößerung des Außendurchmessers der Druckfeder Reibung zwischen der Druckfeder und dem Feder topf entsteht. Diese Reibung ist, wie Versuche zeigten, so groß, daß die Energieaufnahme des erfindungsgemäßen Pralldämpfers mehr als das Dreifache von dem beträgt, was aufgrund der Federkonstante zu erwarten ist. Dies führt dazu, daß der erfindungsgernäße Pralldämpfer im Vergleich zu hydraulaschen Dämpfern bei gleichen äußeren Abmessungen praktisoh die gleiche Energieaufnahme möglich macht, Jedoch in der Herstellung wesentlich billiger ist. Gemeinsam mit den hydraulischen Pralldämpfern hat der erfindungsganue Praildämpfer den Vorteil einer selbsttätigen Rucketellung in die Ausgangsposition nach einem Aufprall.This measure, which at first glance appears insignificant, leads to the fact that as a result of the enlargement of the outer diameter occurring during compression the compression spring creates friction between the compression spring and the spring pot. These As experiments have shown, friction is so great that the energy absorption of the invention Impact damper is more than three times what is due to the spring rate is to be expected. This leads to the fact that the inventive impact damper in comparison to hydraulic dampers with the same external dimensions practically the same Makes energy absorption possible, but is much cheaper to manufacture. Together with the hydraulic impact dampers, the invented preamble damper the advantage of an automatic return to the starting position after a Impact.

Zwei Ausfüungsbeispiele der Erfindung ist in der Zeichnung dargestellt und wird im folgenden beschrieben. Es zeigen Fig. 1 den erfindungsgemäßen Pralldämpfer im Längsschnitt; Fig. 2 ein zweites Ausführungsbeispiel des erfindungsgemaßen Pralldämpfers im Längsschnitt; Fig. 3 ein Funttionsdiagramm des erfindungsgemäßen Pralldämpfern.Two exemplary embodiments of the invention are shown in the drawing and is described below. 1 shows the impact damper according to the invention in longitudinal section; Fig. 2 shows a second embodiment of the impact damper according to the invention in longitudinal section; 3 shows a function diagram of the impact absorber according to the invention.

Der Pralldämpfer nach Fig. 1 besteht aus einem Feder -topf 1, in dem eine Druckfeder 2 ohne wesentliches oder ohne radiales Spiel angeordnet ist. Der Federtopf 1 hat eine Grundplatte 3, mit der er am Phrzeugaufbau zu befestigen ist. Die Aufnahmeplatte kann auch auf dem Rohr befestigt werden. Im Federtopf 1 ist ein Stempel 4 gegen die Druckfeder 2 abgestützt. An dies ei Stempel 4 ist eine nicht dargestellte Stoßstange zu befestigen.The impact damper according to Fig. 1 consists of a spring pot 1 in which a compression spring 2 without essential or arranged without radial play is. The spring cup 1 has a base plate 3, with which it can be attached to the drum assembly is. The mounting plate can also be attached to the pipe. In the spring cup 1 a plunger 4 is supported against the compression spring 2. On this one stamp 4 is a To attach the bumper, not shown.

Gemäß dem Ausführungsbeispiel nach Fig. 2 ist die Druckfeder 2 am Außendurchmesser mit einer Abflachung 5 versehen.According to the embodiment of FIG. 2, the compression spring 2 is on Provided the outer diameter with a flat 5.

Beim Einfahren des Stempels 4 nimmt die Kraft der Druckfeder 2 entsprechend der in dem Diagramm nach Figur 2 eingezeichneten gersden Federkennlinie eu. Infolge der Reibung zwischen der Innenwand des Federtopfes 1 und der Druckfeder beim Einfedern entsteht Jedoch der mit Pfeilen gekennzeichnete Kraftverlauf.When the ram 4 is retracted, the force of the compression spring 2 increases accordingly the gersden spring characteristic eu drawn in the diagram according to FIG. As a result the friction between the inner wall of the spring cup 1 and the compression spring during compression However, the force curve marked with arrows arises.

Man erkennt, daß die Kraft über dem Hub etwa dreimal eo stark zunimmt, wie das aufgrund der Federtrennlinie zu erwarten ist.It can be seen that the force increases about three times eo strongly over the stroke, as is to be expected based on the spring dividing line.

Bei Druckentlastung nimmt die Kraft zunächst fast ohne Rückhub ab. Dadurch wird ein schädlichee Zurückprallen des Fahrzeugs nach einem Aufprall vermieden.When the pressure is released, the force initially decreases with almost no return stroke. This avoids harmful rebounding of the vehicle after an impact.

Claims (2)

Patentansprüche 1. Pralldämpfer, bestehend aus einem eine Druckfeder enthaltenden Federtopf, in den gegen die Kraft der Druckfeder ein Stempel einfahrbar ist, dadurch g e k e n n z e i c h n e t, daß die Druckfeder (2) im Pedertopf (1) ohne wesentliches oder ohne Spiel angeordnet ist.Claims 1. Impact damper, consisting of a compression spring containing spring pot, into which a plunger can be retracted against the force of the compression spring is, by the fact that the compression spring (2) in the Pedertopf (1) is arranged with no substantial or no play. 2. Pralldämpfer nach anspruch 1, dadurch g e k e n n -8 e i c h n e t, daß die Druckfeder (2) am Außendurchmesser mit einer Abflachung (5) versehen ist.2. Impact damper according to claim 1, thereby g e k e n n -8 e i c h n e t that the compression spring (2) is provided with a flat (5) on the outer diameter is.
DE19772709428 1977-03-04 1977-03-04 Compression spring vehicle shock absorber - has compression spring inside cylinder, between end plate and piston Pending DE2709428A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772709428 DE2709428A1 (en) 1977-03-04 1977-03-04 Compression spring vehicle shock absorber - has compression spring inside cylinder, between end plate and piston

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772709428 DE2709428A1 (en) 1977-03-04 1977-03-04 Compression spring vehicle shock absorber - has compression spring inside cylinder, between end plate and piston

Publications (1)

Publication Number Publication Date
DE2709428A1 true DE2709428A1 (en) 1978-09-07

Family

ID=6002760

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772709428 Pending DE2709428A1 (en) 1977-03-04 1977-03-04 Compression spring vehicle shock absorber - has compression spring inside cylinder, between end plate and piston

Country Status (1)

Country Link
DE (1) DE2709428A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3919031A1 (en) * 1989-06-10 1990-12-13 Michael T Dipl Ing Witt IMPACT PROTECTION SYSTEM FOR VEHICLES
DE19526119C2 (en) * 1995-07-19 2002-10-24 Michael T Witt Impact energy absorbing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3919031A1 (en) * 1989-06-10 1990-12-13 Michael T Dipl Ing Witt IMPACT PROTECTION SYSTEM FOR VEHICLES
DE19526119C2 (en) * 1995-07-19 2002-10-24 Michael T Witt Impact energy absorbing device

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