WO2021035268A1 - Telescopic shock absorber - Google Patents

Telescopic shock absorber Download PDF

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Publication number
WO2021035268A1
WO2021035268A1 PCT/AT2020/060318 AT2020060318W WO2021035268A1 WO 2021035268 A1 WO2021035268 A1 WO 2021035268A1 AT 2020060318 W AT2020060318 W AT 2020060318W WO 2021035268 A1 WO2021035268 A1 WO 2021035268A1
Authority
WO
WIPO (PCT)
Prior art keywords
shock absorber
spring
telescopic shock
tube
stop
Prior art date
Application number
PCT/AT2020/060318
Other languages
German (de)
French (fr)
Inventor
Norbert STADLBAUER
Original Assignee
Stadlbauer Norbert
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 Stadlbauer Norbert filed Critical Stadlbauer Norbert
Priority to DE112020004117.4T priority Critical patent/DE112020004117A5/en
Publication of WO2021035268A1 publication Critical patent/WO2021035268A1/en

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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
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/22—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with one or more cylinders each having a single working space closed by a piston or plunger
    • F16F9/26—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with one or more cylinders each having a single working space closed by a piston or plunger with two cylinders in line and with the two pistons or plungers connected together
    • 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
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
    • F16F7/09—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other in dampers of the cylinder-and-piston type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/061—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper with a coil spring being mounted inside the damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K25/06—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms
    • B62K25/08—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms for front wheel
    • 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
    • F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
    • F16F13/007—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper the damper being a fluid damper
    • 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
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/062—Bi-tubular 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
    • 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
    • F16F9/3221—Constructional features of piston rods
    • 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
    • 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
    • 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
    • F16F2238/00—Type of springs or dampers
    • F16F2238/02—Springs
    • F16F2238/026—Springs wound- or coil-like
    • 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
    • F16F2238/00—Type of springs or dampers
    • F16F2238/04—Damper

Definitions

  • the invention relates to a hydraulic telescopic shock absorber in two-pipe design.
  • DE 2911768 A1 shows a damper which has a hollow piston rod which is provided with a transverse opening.
  • a spring is arranged around the piston rod in the innermost chamber.
  • GB 191006 A shows a damper in which the spring extends over the entire length of a chamber.
  • DE 102006006286 A1 shows a damper in which a compression coil spring is arranged around a rod part and a flange part is connected to the rod part, so that the helical compression spring is arranged between the lower surface of the flange part and the upper surface of the upper cover of the cylinder part.
  • DE 2533173 A1 shows a damper in which there is a spring above a hollow piston rod which is supported on the piston.
  • EP 2479096 A1 shows a damper in which a spring extends through the entire spring chamber and thus into the oil filling of the spring chamber.
  • WO 2008085097 A1 shows a damper in which the spring chamber is partially filled with oil. As can be seen from Fig. 1, the spring is almost entirely in the oil filling.
  • US 6234505 B1 shows a damper in which the spring extends to the lower end of a reservoir and is supported on the piston.
  • EP 2479097 A2 shows a damper in which the main spring is arranged in a first chamber which is filled with an oil-air mixture. The spring extends to the lower end of the chamber.
  • DE 102005040581 A1 shows a damper in which the spring extends to the lower end of a chamber and is supported on the piston.
  • WO 8604125 A1 shows a damper in which the spring extends to the lower end of a chamber and into the oil filling.
  • US 6260832 B1 shows a damper in which the spring extends below the level of the oil filling.
  • Fig. 1 and Fig. 2 show a telescopic shock absorber in two-tube construction according to the prior art.
  • the telescopic shock absorber has an internal damper insert, which has a closed housing (closed cartridge), which means that the damper insert has a separate oil filling.
  • the telescopic shock absorber also has two guide tubes, in the form of a lower tube (mostly as an inner tube) and an upper tube (mostly as an outer tube).
  • the lower tube is filled with oil.
  • a spring is arranged around the damper insert in the guide tubes. The spring is in the oil filling. When the telescopic shock absorber is compressed, the damper insert is moved downwards in the direction of the oil filling and dips into it. The oil in the oil filling is displaced through the gap between the damper insert and the lower tube, in which gap the spring is located.
  • the spring thus reduces the cross section that is available for displacing the oil. Since the pitch of the spring becomes smaller with increasing compression of the telescopic shock absorber, the cross section which is available for the displacement of the oil is additionally reduced, so that the cross section is not constant.
  • the object on which the invention is based is to improve the construction of a telescopic shock absorber so that the oil flow in the gap between the lower tube and the damper insert is improved.
  • a telescopic shock absorber according to claim 1 is proposed to achieve the object.
  • the shock absorber is in a vertical orientation, the stop being below the spring.
  • the shock absorber or just its lower tube can be placed vertically and it can be determined whether the level of the oil filling is below the stop for the spring.
  • the advantage of the present invention over the prior art is that the oil flow in the gap between the lower tube and the damper insert is improved.
  • the stop creates a displacement of the spring.
  • the stop preferably has a fixed distance from the bottom of the lower tube. Moving the spring (also known as the main spring) reduces its influence on dynamic damping forces.
  • the telescopic shock absorber according to the invention or two telescopic shock absorbers according to the invention are preferably used in a motorcycle front fork.
  • the level of the oil filling is preferably located in the installation position on the vehicle, in particular two-wheeled vehicle, in particular motorcycle, below the stop.
  • the installation position can be inclined to the vertical.
  • the level of the oil filling is preferably located at an angle between the longitudinal axis of the telescopic shock absorber and the vertical of less than or equal to 37 ° below the stop.
  • the level of the oil filling is preferably located at an angle between the longitudinal axis of the telescopic shock absorber and the vertical of less than or equal to 27 ° below the stop.
  • a sleeve which is inserted into the telescopic shock absorber can serve as a stop.
  • One embodiment relates to a method for producing a telescopic shock absorber, with a sleeve being inserted into the lower tube in a conventional telescopic shock absorber, in which the spring is in the extended state in the oil filling, which forms a stop for a spring, which stop in the extended state is above the oil filling.
  • a telescopic shock absorber in two-tube design which comprises an internal damper insert and two guide tubes, which are in the form of a lower tube and an upper tube, a chamber with partial oil filling being present between the guide tubes and the housing of the internal damper insert, with A spring is arranged in this chamber around the housing of the damper insert, the telescopic shock absorber having a stop for the spring on the lower tube, on which the end of the spring facing the bottom of the lower tube is supported, the lower end of the spring being rebounded State of the telescopic shock absorber is above the level of the oil filling.
  • the lower tube is preferably present as an inner tube and the upper tube as an outer tube.
  • the upper end of the spring is preferably supported on the outer tube. If the housing of the damper insert is firmly connected to the outer tube, the upper end of the spring can also be supported on the housing of the damper insert.
  • the stop is preferably on the lower tube.
  • the stop is on a sleeve which is inserted into the lower tube.
  • a piston rod extends from the damper insert down to the bottom of the lower tube and is connected to it, the piston rod being guided in the housing of the damper insert, the housing of the damper insert being the component that is in the oil filling penetrates and wherein the housing extends to the upper end of the interior of the upper tube and is connected to it.
  • the damper insert has a tight housing, the damper insert having a separate oil filling which is sealed off from the oil filling of the lower tube.
  • the lower end of the housing of the damper insert lies above the stop when the telescopic shock absorber is fully extended.
  • the housing of the damper insert when the telescopic shock absorber is compressed, the housing of the damper insert is immersed in the oil filling, whereby at least at the time of the initial immersion, oil passes through the space between the housing and the lower tube without reaching the spring.
  • a preferred method for producing a telescopic shock absorber according to the invention is that in a conventional telescopic shock absorber, in which the spring is present in the rebounded state in the oil filling, a sleeve is inserted into the lower tube, which forms a stop for a spring, which stop in the rebounded state is above the oil filling.
  • Fig. 3 shows a hydraulic telescopic shock absorber according to the invention in two-pipe construction in the sprung state.
  • Fig. 4 shows the hydraulic telescopic shock absorber according to the invention in two-pipe construction in the compressed state.
  • FIG. 5 shows a detailed view of the hydraulic telescopic shock absorber according to the invention in the extended state.
  • FIG. 6 illustrates schematically and in a greatly simplified manner the structure of an exemplary hydraulic telescopic shock absorber according to the invention in the extended state.
  • the telescopic shock absorber is shown in a vertical position. 3 to 5 all show the same telescopic shock absorber 1 according to the invention in a two-tube design. 6 illustrates its structure schematically.
  • the telescopic shock absorber 1 has an internal damper insert 2, which has a closed housing 3 (closed cartridge), which means that the damper insert 2 has a separate oil filling 12.
  • the telescopic shock absorber 1 also has two guide tubes, in the form of a lower tube 4 (mostly as an inner tube) and an upper tube 5 (mostly as an outer tube).
  • the lower tube 4 has an oil filling 6.
  • a spring 7 is arranged around the damper insert 2 in the guide tubes 4, 5.
  • the lower tube 4 has a stop 8 for the spring 7 at a distance from its lower end and thus at a distance from the bottom of the chamber present in the lower tube 4.
  • the stop 8 is at a fixed distance from the lower tube 4 and thus from the bottom of the chamber.
  • the lower tube 4 preferably has the stop 8 at its upper end region.
  • the stop 8 can either be present in one piece on the lower tube 4, or it can be an additional element which is inserted into the lower tube 4, for example in the form of a sleeve or a ring. In the case of a ring, the lower tube 4 can have a groove into which it is inserted.
  • the stop 8 is preferably located in the upper half of the interior of the lower tube 4, preferably in the upper third, especially in the upper quarter of the lower tube 4.
  • the inner tube slides in the outer tube, with a sealing element between the tubes.
  • the stop 8 lies above the oil filling 6 (FIG. 3).
  • the damper insert 2 is immersed in the oil filling 6, at least initially the oil in the gap between the damper insert 2 and the lower tube 4 is displaced without hitting the stop 8 or the spring 7 (FIG. 4).
  • the stop 8 is at a sufficient radial distance from the damper insert 2 so that air and possibly oil can pass through the resulting gap between the stop 8 and the damper insert 2.
  • the lower tube 4 is preferably designed as an inner tube and the upper tube 5 is preferably designed as an outer tube, so that the lower tube 4 is located inside the upper tube 5. From the damper insert
  • a piston rod 9 preferably extends down to the bottom of the lower tube 4.
  • the piston rod 9 is connected to the lower tube 4, in particular at its bottom.
  • the piston rod 9 is guided in the housing 3 of the damper insert 2.
  • the housing 3 of the damper insert 2 is the component that penetrates the oil filling 6 during compression.
  • the housing 3 preferably extends to the upper end of the interior of the upper tube 5.
  • the housing 3 is connected to the upper tube or its upper end face.
  • the damper insert 2 can also be in the opposite orientation, so that its piston rod 9 is connected to the upper end of the interior of the upper tube 5 and its housing 3 is connected to the bottom of the lower tube.
  • the damper insert 2 has a piston head 11 which is guided in the housing 3.
  • the piston head 11 has openings (not shown) so that the oil can pass through the separate oil filling 12 so that the piston is movable in the housing 3. During compression, the piston head 11 is moved upwards and the spring 7 is compressed.
  • Fig. 5 a section of the telescopic shock absorber 1 shown in Fig. 3 is shown.
  • the stop 8 is preferably present as the upper end of a sleeve 10, which sleeve 10 is inserted into the lower tube 4.
  • This variant is advantageous because existing telescopic shock absorbers known from the prior art can be converted into a telescopic shock absorber 1 according to the invention by inserting this sleeve 10 and using a shorter spring 7.
  • the inner diameter of the stop 8 is smaller than the diameter of the area of the lower tube 4 and / or the upper tube 5 adjoining it, so that the stop forms a support surface for the spring 7 on its upper side.
  • the other, upper side of the spring 7 can be supported on the outer tube 5 or its overhead inner end face.
  • a sleeve can also be present between the spring 7 and the inner end face of the upper tube 5.
  • the sleeve or the spring 7 can also be supported on a spring preload adjuster of the telescopic shock absorber 1.
  • the inner diameter of the stop 8 is preferably smaller than the diameter of the area of the lower tube 4 and / or the sleeve 10 adjoining it.

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

Abstract

The invention relates to a telescopic shock absorber (1) of twin tube design which comprises an inner damper insert (2) and two guide tubes which are present in the form of a lower tube (4) and an upper tube (5), wherein the lower tube (4) has an oil filling (6), wherein a spring (7) is arranged around the damper insert (2) within the guide tubes, wherein the telescopic shock absorber (1) has a stop (8) for the spring (7), wherein the spring (7) is above the oil filling (6) in the extended state of the telescopic shock absorber (7).

Description

Teleskopstoßdämpfer Telescopic shock absorbers
Die Erfindung betrifft einen hydraulischen Teleskopstoßdämpfer in Zweirohrbauweise. The invention relates to a hydraulic telescopic shock absorber in two-pipe design.
Die DE 8016907 Ul, die EP 0114623 Al, die EP 0066299 Al und die US3912054A zeigen jeweils einen Dämpfer, welcher eine hohle Kolbenstange aufweist, welche mit einer Queröffnung versehen ist. Die hohle Kolbenstange ist mit dem Außenraum verbunden. Die Feder ist am Kolben abgestützt und erstreckt sich zur Gänze durch jene Kammer in die sie eingesetzt ist. DE 8016907 Ul, EP 0114623 A1, EP 0066299 A1 and US3912054A each show a damper which has a hollow piston rod which is provided with a transverse opening. The hollow piston rod is connected to the outside space. The spring is supported on the piston and extends completely through the chamber in which it is inserted.
Die DE 2841354 Al und die GB 1588267 A zeigen jeweils einen Dämpfer, welcher eine hohle Kolbenstange aufweist, welche mit einer Queröffnung versehen ist. Eine Feder liegt einseitig des Kolbens vor. DE 2841354 A1 and GB 1588267 A each show a damper which has a hollow piston rod which is provided with a transverse opening. There is a spring on one side of the piston.
Die DE 2911768 Al zeigt einen Dämpfer, welcher eine hohle Kolbenstange aufweist, welche mit einer Queröffnung versehen ist. Eine Feder ist in der innersten Kammer um die Kolbenstange angeordnet. DE 2911768 A1 shows a damper which has a hollow piston rod which is provided with a transverse opening. A spring is arranged around the piston rod in the innermost chamber.
Die GB 191006 A zeigt einen Dämpfer, bei welchem sich die Feder über die gesamte Länge einer Kammer erstreckt. GB 191006 A shows a damper in which the spring extends over the entire length of a chamber.
Die DE 102006006286 Al zeigt einen Dämpfer, bei welchem eine Druckschraubenfeder um ein Stangenteil herum angeordnet ist und ein Flanschteil mit dem Stangenteil verbunden ist, so dass die Schraubendruckfeder zwischen der unteren Oberfläche des Flanschteiles und der oberen Oberfläche des oberen Deckels des Zylinderteiles angeordnet ist. DE 102006006286 A1 shows a damper in which a compression coil spring is arranged around a rod part and a flange part is connected to the rod part, so that the helical compression spring is arranged between the lower surface of the flange part and the upper surface of the upper cover of the cylinder part.
Die DE 2533173 Al zeigt einen Dämpfer, bei welchem oberhalb einer hohlen Kolbenstange eine Feder vorliegt, welche am Kolben abgestützt ist. DE 2533173 A1 shows a damper in which there is a spring above a hollow piston rod which is supported on the piston.
Die EP 2479096 Al zeigt einen Dämpfer, bei welchem sich eine Feder durch die gesamte Federkammer erstreckt und somit bis in die Ölfüllung der Federkammer. EP 2479096 A1 shows a damper in which a spring extends through the entire spring chamber and thus into the oil filling of the spring chamber.
Die WO 2008085097 Al zeigt einen Dämpfer, bei welchem die Federkammer teilweise mit Öl gefüllt ist. Wie aus Fig. 1 hervorgeht, befindet sich die Feder nahezu zur Gänze in der Ölfüllung. Die US 6234505 Bl zeigt einen Dämpfer, bei welchem sich die Feder bis ans untere Ende eines Reservoirs erstreckt und am Kolben abgestützt ist. WO 2008085097 A1 shows a damper in which the spring chamber is partially filled with oil. As can be seen from Fig. 1, the spring is almost entirely in the oil filling. US 6234505 B1 shows a damper in which the spring extends to the lower end of a reservoir and is supported on the piston.
Die EP 2479097 A2 zeigt einen Dämpfer, bei welchem die Hauptfeder in einer ersten Kammer angeordnet ist, die mit einem Öl-Luft-Gemisch gefüllt ist. Die Feder erstreckt sich bis ans untere Ende der Kammer. EP 2479097 A2 shows a damper in which the main spring is arranged in a first chamber which is filled with an oil-air mixture. The spring extends to the lower end of the chamber.
Die DE 102005040581 Al zeigt einen Dämpfer, bei welchem sich die Feder bis ans untere Ende einer Kammer erstreckt und am Kolben abgestützt ist. Die WO 8604125 Al zeigt einen Dämpfer, bei welchem sich die Feder bis ans untere Ende einer Kammer bis in die Ölfüllung erstreckt. DE 102005040581 A1 shows a damper in which the spring extends to the lower end of a chamber and is supported on the piston. WO 8604125 A1 shows a damper in which the spring extends to the lower end of a chamber and into the oil filling.
Die US 6260832 Bl zeigt einen Dämpfer, bei welchem sich die Feder bis unter den Spiegel der Ölfüllung erstreckt. US 6260832 B1 shows a damper in which the spring extends below the level of the oil filling.
Fig. 1 und Fig. 2 zeigen einen Teleskopstoßdämpfer in Zweirohrbauweise nach dem Stand der Technik. Bei dieser Bauform weist der Teleskopstoßdämpfer einen innenliegenden Dämpfereinsatz auf, welcher ein geschlossenes Gehäuse (closed cartridge) aufweist, was bedeutet, dass der Dämpfereinsatz eine gesonderte Ölfüllung aufweist. Der Teleskopstoßdämpfer weist zudem zwei Führungsrohre auf, in Form eines unteren Rohrs (meist als Innenrohr) und eines oberen Rohrs (meist als Außenrohr). Das untere Rohr weist eine Ölfüllung auf. In den Führungsrohren ist eine Feder um den Dämpfereinsatz angeordnet. Die Feder liegt in der Ölfüllung vor. Beim Einfedem des Teleskopstoßdämpfers wird der Dämpfereinsatz nach unten in Richtung der Ölfüllung bewegt und taucht in diese ein. Das Öl der Ölfüllung wird durch den Spalt zwischen dem Dämpfereinsatz und dem unteren Rohr verdrängt, in welchem Spalt die Feder vorliegt. Fig. 1 and Fig. 2 show a telescopic shock absorber in two-tube construction according to the prior art. In this design, the telescopic shock absorber has an internal damper insert, which has a closed housing (closed cartridge), which means that the damper insert has a separate oil filling. The telescopic shock absorber also has two guide tubes, in the form of a lower tube (mostly as an inner tube) and an upper tube (mostly as an outer tube). The lower tube is filled with oil. A spring is arranged around the damper insert in the guide tubes. The spring is in the oil filling. When the telescopic shock absorber is compressed, the damper insert is moved downwards in the direction of the oil filling and dips into it. The oil in the oil filling is displaced through the gap between the damper insert and the lower tube, in which gap the spring is located.
Die Feder reduziert somit den Querschnitt, welcher für die Verdrängung des Öls zur Verfügung steht. Da die Steigung der Feder bei zunehmendem Einfedern des Teleskopstoßdämpfers geringer wird, wird der Querschnitt, welcher für die Verdrängung des Öls zur Verfügung steht, zusätzlich verringert, sodass der Querschnitt nicht konstant ist. The spring thus reduces the cross section that is available for displacing the oil. Since the pitch of the spring becomes smaller with increasing compression of the telescopic shock absorber, the cross section which is available for the displacement of the oil is additionally reduced, so that the cross section is not constant.
Die der Erfindung zu Grunde liegende Aufgabe besteht darin, den Aufbau eines Teleskopstoßdämpfers zu verbessern, sodass der Ölfluss im Spalt zwischen dem unteren Rohr und dem Dämpfereinsatz verbessert wird. The object on which the invention is based is to improve the construction of a telescopic shock absorber so that the oil flow in the gap between the lower tube and the damper insert is improved.
Als Lösen der Aufgabe wird ein Teleskopstoßdämpfer nach Anspruch 1 vorgeschlagen. A telescopic shock absorber according to claim 1 is proposed to achieve the object.
Für das Lösen der Aufgabe wird also vorgeschlagen, einen Anschlag für die Feder vorzusehen, wobei die Feder im ausgefederten Zustand des Teleskopstoßdämpfers oberhalb der Ölfüllung vorliegt. Der Stoßdämpfer liegt dabei in senkrechter Ausrichtung vor, wobei der Anschlag unterhalb der Feder vorliegt. Zur Feststellung ob dieses Merkmal gegeben ist, kann der Stoßdämpfer oder nur dessen unteres Rohr senkrecht gestellt werden und festgestellt werden, ob der Spiegel der Ölfüllung unterhalb des Anschlages für die Feder vorliegt. To achieve the object, it is proposed to provide a stop for the spring, the spring being present above the oil filling when the telescopic shock absorber is in the extended state. The shock absorber is in a vertical orientation, the stop being below the spring. To determine whether this feature is given, the shock absorber or just its lower tube can be placed vertically and it can be determined whether the level of the oil filling is below the stop for the spring.
Vorteilhaft an der gegenständlichen Erfindung gegenüber dem Stand der Technik ist, dass der Ölfluss im Spalt zwischen dem unteren Rohr und dem Dämpfereinsatz verbessert wird. The advantage of the present invention over the prior art is that the oil flow in the gap between the lower tube and the damper insert is improved.
Der Anschlag schafft eine Versetzung der Feder. The stop creates a displacement of the spring.
Der Anschlag weist bevorzugt einen festen Abstand zum Boden des unteren Rohres auf. Durch die Versetzung der Feder (auch als Hauptfeder bezeichnet) wird deren Einfluss auf dynamische Dämpfkräfte reduziert. The stop preferably has a fixed distance from the bottom of the lower tube. Moving the spring (also known as the main spring) reduces its influence on dynamic damping forces.
Bevorzugt wird der erfindungsgemäße Teleskopstoßdämpfer bzw. zwei erfindungsgemäße Teleskopstoßdämpfer in einer Motorradvordergabel verwendet. Bevorzugt befindet sich der Spiegel der Ölfüllung in Einbaulage am Fahrzeug, insbesondere Zweirad, insbesondere Motorrad, unterhalb des Anschlages. Die Einbaulage kann geneigt zur Vertikalen vorliegen. Bevorzugt liegt der Spiegel der Ölfüllung bei einem Winkel zwischen der Längsachse des Teleskopstoßdämpfers und der Senkrechten von kleiner gleich 37° unter dem Anschlag. The telescopic shock absorber according to the invention or two telescopic shock absorbers according to the invention are preferably used in a motorcycle front fork. The level of the oil filling is preferably located in the installation position on the vehicle, in particular two-wheeled vehicle, in particular motorcycle, below the stop. The installation position can be inclined to the vertical. The level of the oil filling is preferably located at an angle between the longitudinal axis of the telescopic shock absorber and the vertical of less than or equal to 37 ° below the stop.
Bevorzugt liegt der Spiegel der Ölfüllung bei einem Winkel zwischen der Längsachse des Teleskopstoßdämpfers und der Senkrechten von kleiner gleich 27° unter dem Anschlag. The level of the oil filling is preferably located at an angle between the longitudinal axis of the telescopic shock absorber and the vertical of less than or equal to 27 ° below the stop.
Als Anschlag kann eine Hülse dienen, welche in den Teleskopstoßdämpfer eingesetzt ist. A sleeve which is inserted into the telescopic shock absorber can serve as a stop.
Eine Ausführungsvariante betrifft ein Verfahren zur Herstellung eines Teleskopstoßdämpfer, wobei in einen herkömmlichen Teleskopstoßdämpfer, bei welchem die Feder im ausgefederten Zustand in der Ölfüllung vorliegt, eine Hülse ins untere Rohr eingesetzt wird, welche einen Anschlag für eine Feder bildet, welcher Anschlag im ausgefedertem Zustand oberhalb der Ölfüllung liegt. One embodiment relates to a method for producing a telescopic shock absorber, with a sleeve being inserted into the lower tube in a conventional telescopic shock absorber, in which the spring is in the extended state in the oil filling, which forms a stop for a spring, which stop in the extended state is above the oil filling.
In einer Ausführungsvariante wird ein Teleskopstoßdämpfer in Zweirohrbauweise vorgeschlagen, welcher einen innenliegenden Dämpfereinsatz und zwei Führungsrohre umfasst, welche in Form eines unteren Rohrs und eines oberen Rohrs vorliegen, wobei zwischen den Führungsrohren und dem Gehäuse des innenliegenden Dämpfereinsatzes eine Kammer mit teil weiser Ölfüllung vorliegt, wobei in dieser Kammer um das Gehäuse des Dämpfereinsatzes herum eine Feder angeordnet ist, wobei der Teleskopstoßdämpfer am unteren Rohr einen Anschlag für die Feder aufweist, an welchem das dem Boden des unteren Rohrs zugewandte Ende der Feder abgestützt ist, wobei das untere Ende der Feder im ausgefederten Zustand des Teleskopstoßdämpfers oberhalb des Spiegels der Ölfüllung vorliegt. In one embodiment, a telescopic shock absorber in two-tube design is proposed, which comprises an internal damper insert and two guide tubes, which are in the form of a lower tube and an upper tube, a chamber with partial oil filling being present between the guide tubes and the housing of the internal damper insert, with A spring is arranged in this chamber around the housing of the damper insert, the telescopic shock absorber having a stop for the spring on the lower tube, on which the end of the spring facing the bottom of the lower tube is supported, the lower end of the spring being rebounded State of the telescopic shock absorber is above the level of the oil filling.
Bevorzugt liegt das untere Rohr als Innenrohr vor und das obere Rohr als Außenrohr. The lower tube is preferably present as an inner tube and the upper tube as an outer tube.
Das obere Ende der Feder ist bevorzugt am Außenrohr abgestützt. Wenn das Gehäuse des Dämpfereinsatzes fest mit dem Außenrohr verbunden ist, kann das obere Ende der Feder auch am Gehäuse des Dämpfereinsatzes abgestützt sein. The upper end of the spring is preferably supported on the outer tube. If the housing of the damper insert is firmly connected to the outer tube, the upper end of the spring can also be supported on the housing of the damper insert.
Bevorzugt liegt der Anschlag am unteren Rohr vor. The stop is preferably on the lower tube.
In einer Ausführungsvariante liegt der Anschlag an einer Hülse vor, welche in das untere Rohr eingesetzt ist. In einer Variante ist vorgesehen, dass sich vom Dämpfereinsatz eine Kolbenstange nach unten bis zum Boden des unteren Rohres erstreckt und mit diesem verbunden ist, wobei die Kolbenstange im Gehäuse des Dämpfereinsatzes geführt ist, wobei das Gehäuse des Dämpfereinsatzes jenes Bauteil ist, welches beim Einfedern in die Ölfüllung eindringt und wobei sich das Gehäuse bis zum oberen Ende des Innenraums des oberen Rohres erstreckt und mit diesem verbunden ist. In one embodiment, the stop is on a sleeve which is inserted into the lower tube. In a variant it is provided that a piston rod extends from the damper insert down to the bottom of the lower tube and is connected to it, the piston rod being guided in the housing of the damper insert, the housing of the damper insert being the component that is in the oil filling penetrates and wherein the housing extends to the upper end of the interior of the upper tube and is connected to it.
In einer Variante ist vorgesehen, dass der Dämpfereinsatz ein dichtes Gehäuse aufweist, wobei der Dämpfereinsatz eine gesonderte Ölfüllung aufweist, welche gegenüber der Ölfüllung des unteren Rohres abgedichtet ist. In a variant it is provided that the damper insert has a tight housing, the damper insert having a separate oil filling which is sealed off from the oil filling of the lower tube.
In einer Variante ist vorgesehen, dass das untere Ende des Gehäuses des Dämpfereinsatz im voll ausgefederten Zustand des Teleskopstoßdämpfers oberhalb des Anschlages liegt. In a variant it is provided that the lower end of the housing of the damper insert lies above the stop when the telescopic shock absorber is fully extended.
In einer Variante ist vorgesehen, dass beim Einfedem des Teleskopstoßdämpfers das Gehäuse des Dämpfereinsatzes in die Ölfüllung eintaucht, wobei zumindest zum Zeitpunkt des initialen Eintauchens Öl durch den Zwischenraum zwischen dem Gehäuse und dem unteren Rohr gelangt, ohne an die Feder zu gelangen. In a variant it is provided that when the telescopic shock absorber is compressed, the housing of the damper insert is immersed in the oil filling, whereby at least at the time of the initial immersion, oil passes through the space between the housing and the lower tube without reaching the spring.
Ein bevorzugtes Verfahren zur Herstellung eines erfindungsgemäßen Teleskopstoßdämpfers besteht darin, dass in einen herkömmlichen Teleskopstoßdämpfer, bei welchem die Feder im ausgefederten Zustand in der Ölfüllung vorliegt eine Hülse ins untere Rohr eingesetzt wird, welche einen Anschlag für eine Feder bildet, welcher Anschlag im ausgefedertem Zustand oberhalb der Ölfüllung liegt. A preferred method for producing a telescopic shock absorber according to the invention is that in a conventional telescopic shock absorber, in which the spring is present in the rebounded state in the oil filling, a sleeve is inserted into the lower tube, which forms a stop for a spring, which stop in the rebounded state is above the oil filling.
Eine besonders bevorzugte Variante der Erfindung wird an Hand von Zeichnungen veranschaulicht: A particularly preferred variant of the invention is illustrated by means of drawings:
Fig. 3 : zeigt einen erfindungsgemäßen hydraulischen Teleskopstoßdämpfer in Zweirohrbauweise in ausgefedertem Zustand. Fig. 3: shows a hydraulic telescopic shock absorber according to the invention in two-pipe construction in the sprung state.
Fig. 4: zeigt den erfindungsgemäßen hydraulischen Teleskopstoßdämpfer in Zweirohrbauweise in eingefedertem Zustand. Fig. 4: shows the hydraulic telescopic shock absorber according to the invention in two-pipe construction in the compressed state.
Fig. 5: zeigt eine Detailansicht des erfindungsgemäßen hydraulischen Teleskopstoßdämpfers in ausgefedertem Zustand. 5: shows a detailed view of the hydraulic telescopic shock absorber according to the invention in the extended state.
Fig. 6: veranschaulicht schematisch und stark vereinfacht den Aufbau eines beispielhaften erfindungsgemäßen hydraulischen Teleskopstoßdämpfers in ausgefedertem Zustand.6: illustrates schematically and in a greatly simplified manner the structure of an exemplary hydraulic telescopic shock absorber according to the invention in the extended state.
In der Figurenbeschreibung ist der Teleskopstoßdämpfer in senkrechter Lage dargestellt. Die Fig. 3 bis 5 zeigen alle denselben erfmdungsgemäßen Teleskopstoßdämpfer 1 in Zweirohrbauweise. Fig. 6 veranschaulicht dessen Aufbau schematisch. Der TeleskopstoßdämpferIn the description of the figures, the telescopic shock absorber is shown in a vertical position. 3 to 5 all show the same telescopic shock absorber 1 according to the invention in a two-tube design. 6 illustrates its structure schematically. The telescopic shock absorber
1 weist einen innenliegenden Dämpfereinsatz 2 auf, welcher ein geschlossenes Gehäuse 3 (closed cartridge) aufweist, was bedeutet, dass der Dämpfereinsatz 2 eine gesonderte Ölfüllung 12 aufweist. Der Teleskopstoßdämpfer 1 weist zudem zwei Führungsrohre auf, in Form eines unteren Rohrs 4 (meist als Innenrohr) und eines oberen Rohrs 5 (meist als Außenrohr). Das untere Rohr 4 weist eine Ölfüllung 6 auf. In den Führungsrohren 4,5 ist eine Feder 7 um den Dämpfereinsatz 2 angeordnet. 1 has an internal damper insert 2, which has a closed housing 3 (closed cartridge), which means that the damper insert 2 has a separate oil filling 12. The telescopic shock absorber 1 also has two guide tubes, in the form of a lower tube 4 (mostly as an inner tube) and an upper tube 5 (mostly as an outer tube). The lower tube 4 has an oil filling 6. A spring 7 is arranged around the damper insert 2 in the guide tubes 4, 5.
Das untere Rohr 4 weist beabstandet zu seinem unteren Ende und somit beabstandet zum Boden der im unteren Rohr 4 vorliegenden Kammer einen Anschlag 8 für die Feder 7 auf. Der Anschlag 8 weist einen festen Abstand zum unteren Rohr 4 und somit zum Boden der Kammer auf. The lower tube 4 has a stop 8 for the spring 7 at a distance from its lower end and thus at a distance from the bottom of the chamber present in the lower tube 4. The stop 8 is at a fixed distance from the lower tube 4 and thus from the bottom of the chamber.
Das untere Rohr 4 weist den Anschlag 8 bevorzugt an seinem oberen Endbereich auf. Der Anschlag 8 kann entweder einstückig am unteren Rohr 4 vorliegen, oder ein zusätzliches Element sein, welches in das untere Rohr 4 eingesetzt ist, beispielsweise in Form einer Hülse oder eines Rings. Im Fall eines Rings kann das untere Rohr 4 eine Nut aufweisen, in welche dieser eingesetzt ist. Der Anschlag 8 befindet sich vorzugsweise in der oberen Hälfte des Innenraumes des unteren Rohrs 4, bevorzugt im oberen Drittel, insbesondere im oberen Viertel des unteren Rohres 4. Das Innenrohr gleitet im Außenrohr, wobei zwischen den Rohren ein Dichtungselement vorliegt.The lower tube 4 preferably has the stop 8 at its upper end region. The stop 8 can either be present in one piece on the lower tube 4, or it can be an additional element which is inserted into the lower tube 4, for example in the form of a sleeve or a ring. In the case of a ring, the lower tube 4 can have a groove into which it is inserted. The stop 8 is preferably located in the upper half of the interior of the lower tube 4, preferably in the upper third, especially in the upper quarter of the lower tube 4. The inner tube slides in the outer tube, with a sealing element between the tubes.
Der Anschlag 8 liegt bei voll ausgefedertem Teleskopstoßdämpfer 1 oberhalb der Ölfüllung 6 (Fig. 3). Dadurch wird bei Eintauchen des Dämpfereinsatzes 2 in die Ölfüllung 6 zumindest anfangs das Öl im Spalt zwischen dem Dämpfereinsatz 2 und dem unteren Rohr 4 verdrängt, ohne auf den Anschlag 8 oder die Feder 7 zu treffen (Fig. 4). Der Anschlag 8 liegt mit ausreichend Radialabstand zum Dämpfereinsatz 2 vor, sodass Luft und gegebenenfalls Öl den resultierenden Spalt zwischen dem Anschlag 8 und dem Dämpfereinsatz 2 passieren kann. When the telescopic shock absorber 1 is fully extended, the stop 8 lies above the oil filling 6 (FIG. 3). As a result, when the damper insert 2 is immersed in the oil filling 6, at least initially the oil in the gap between the damper insert 2 and the lower tube 4 is displaced without hitting the stop 8 or the spring 7 (FIG. 4). The stop 8 is at a sufficient radial distance from the damper insert 2 so that air and possibly oil can pass through the resulting gap between the stop 8 and the damper insert 2.
Das untere Rohr 4 ist bevorzugt als Innenrohr ausgeführt und das obere Rohr 5 bevorzugt als Außenrohr, sodass das untere Rohr 4 innerhalb des oberen Rohres 5 vorliegt. Vom DämpfereinsatzThe lower tube 4 is preferably designed as an inner tube and the upper tube 5 is preferably designed as an outer tube, so that the lower tube 4 is located inside the upper tube 5. From the damper insert
2 erstreckt sich bevorzugt eine Kolbenstange 9 nach unten bis zum Boden des unteren Rohres 4. Die Kolbenstange 9 ist mit dem unteren Rohr 4 verbunden, insbesondere an dessen Boden. Die Kolbenstange 9 ist im Gehäuse 3 des Dämpfereinsatzes 2 geführt. Das Gehäuse 3 des Dämpfereinsatzes 2 ist dabei jenes Bauteil, welches beim Einfedern in die Ölfüllung 6 eindringt. Das Gehäuse 3 erstreckt sich bevorzugt bis zum oberen Ende des Innenraums des oberen Rohres 5. Das Gehäuse 3 ist mit dem oberen Rohr oder dessen oberer Stirnfläche verbunden. Der Dämpfereinsatz 2 kann auch in umgekehrter Ausrichtung vorliegen, sodass dessen Kolbenstange 9 mit dem oberen Ende des Innenraums des oberen Rohres 5 verbunden ist und dessen Gehäuse 3 mit dem Boden des unteren Rohres. Der Dämpfereinsatz 2 weist einen Kolbenkopf 11 auf, welcher im Gehäuse 3 geführt ist. Der Kolbenkopf 11 weist Öffnungen (nicht dargestellt) auf, sodass das Öl gesonderten Ölfüllung 12 diesen passieren kann, sodass der Kolben im Gehäuse 3 beweglich ist. Beim Einfedem wird der Kolbenkopf 11 nach oben bewegt und die Feder 7 gestaucht. 2, a piston rod 9 preferably extends down to the bottom of the lower tube 4. The piston rod 9 is connected to the lower tube 4, in particular at its bottom. The piston rod 9 is guided in the housing 3 of the damper insert 2. The housing 3 of the damper insert 2 is the component that penetrates the oil filling 6 during compression. The housing 3 preferably extends to the upper end of the interior of the upper tube 5. The housing 3 is connected to the upper tube or its upper end face. The damper insert 2 can also be in the opposite orientation, so that its piston rod 9 is connected to the upper end of the interior of the upper tube 5 and its housing 3 is connected to the bottom of the lower tube. The damper insert 2 has a piston head 11 which is guided in the housing 3. The piston head 11 has openings (not shown) so that the oil can pass through the separate oil filling 12 so that the piston is movable in the housing 3. During compression, the piston head 11 is moved upwards and the spring 7 is compressed.
In Fig. 5 ist ein Ausschnitt des in Fig. 3 dargestellten Teleskopstoßdämpfer 1 dargestellt. Wie in Fig. 5 ersichtlich ist, liegt der Anschlag 8 bevorzugt als oberes Ende einer Hülse 10 vor, welche Hülse 10 in das untere Rohr 4 eingesetzt ist. Diese Variante ist vorteilhaft, da bestehende nach dem Stand der Technik bekannte Teleskopstoßdämpfer durch Einsetzen dieser Hülse 10 und Verwendung einer kürzeren Feder 7 zu einem erfmdungsgemäßen Teleskopstoßdämpfer 1 umgebaut werden können. In Fig. 5 a section of the telescopic shock absorber 1 shown in Fig. 3 is shown. As can be seen in FIG. 5, the stop 8 is preferably present as the upper end of a sleeve 10, which sleeve 10 is inserted into the lower tube 4. This variant is advantageous because existing telescopic shock absorbers known from the prior art can be converted into a telescopic shock absorber 1 according to the invention by inserting this sleeve 10 and using a shorter spring 7.
Der innere Durchmesser des Anschlags 8 ist geringer, als der Durchmesser des darüber anschließenden Bereichs des unteren Rohrs 4 und/oder des oberen Rohrs 5, sodass der Anschlag an seiner oberen Seite eine Auflagefläche für die Feder 7 bildet. Die andere, obere Seite der Feder 7 kann am äußeren Rohr 5 oder dessen obenliegender inneren Stirnfläche abgestützt sein. Zwischen der Feder 7 und der inneren Stirnfläche des oberen Rohrs 5 kann auch eine Hülse vorliegen. Die Hülse oder die Feder 7 kann auch an einem Federvorspanneinsteller des Teleskopstoßdämpfers 1 abgestützt sein. The inner diameter of the stop 8 is smaller than the diameter of the area of the lower tube 4 and / or the upper tube 5 adjoining it, so that the stop forms a support surface for the spring 7 on its upper side. The other, upper side of the spring 7 can be supported on the outer tube 5 or its overhead inner end face. A sleeve can also be present between the spring 7 and the inner end face of the upper tube 5. The sleeve or the spring 7 can also be supported on a spring preload adjuster of the telescopic shock absorber 1.
Bevorzugt ist der innere Durchmesser des Anschlags 8 geringer, als der Durchmesser des darunter anschließenden Bereichs des unteren Rohres 4 und/oder der Hülse 10. The inner diameter of the stop 8 is preferably smaller than the diameter of the area of the lower tube 4 and / or the sleeve 10 adjoining it.

Claims

Patentansprüche Claims
1. Teleskopstoßdämpfer (1) in Zweirohrbauweise, welcher einen innenliegenden Dämpfereinsatz (2) und zwei Führungsrohre umfasst, welche in Form eines unteren Rohrs (4) und eines oberen Rohrs (5) vorliegen, wobei zwischen den Führungsrohren und dem Gehäuse (3) des innenliegenden Dämpfereinsatzes (2) eine Kammer mit teilweiser Ölfüllung (6) vorliegt, wobei in dieser Kammer um das Gehäuse (3) des Dämpfereinsatzes (2) herum eine Feder (7) angeordnet ist, dadurch gekennzeichnet, dass der Teleskopstoßdämpfer (1) im unteren Rohr (4) einen Anschlag (8) für die Feder (7) aufweist, an welchem das dem Boden des unteren Rohrs (4) zugewandte Ende der Feder (7) abgestützt ist, wobei das untere Ende der Feder (7) im ausgefederten Zustand bei senkrechter Ausrichtung des Teleskopstoßdämpfers (7) oberhalb des Spiegels der Ölfüllung (6) vorliegt. 1. Telescopic shock absorber (1) in two-tube design, which comprises an internal damper insert (2) and two guide tubes, which are in the form of a lower tube (4) and an upper tube (5), with the guide tubes and the housing (3) of the inner damper insert (2) a chamber with partial oil filling (6) is present, a spring (7) being arranged in this chamber around the housing (3) of the damper insert (2), characterized in that the telescopic shock absorber (1) in the lower Tube (4) has a stop (8) for the spring (7) on which the end of the spring (7) facing the bottom of the lower tube (4) is supported, the lower end of the spring (7) in the rebounded state if the telescopic shock absorber (7) is aligned vertically above the level of the oil filling (6).
2. Teleskopstoßdämpfer (1) nach Anspruch 1, dadurch gekennzeichnet, dass das untere Rohr (4) als Innenrohr vorliegt und das obere Rohr (5) als Außenrohr. 2. Telescopic shock absorber (1) according to claim 1, characterized in that the lower tube (4) is present as an inner tube and the upper tube (5) as an outer tube.
3. Teleskopstoßdämpfer (1) nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass der Anschlag (8) am unteren Rohr (4) vorliegt. 3. Telescopic shock absorber (1) according to one of claims 1 to 2, characterized in that the stop (8) is present on the lower tube (4).
4. Teleskopstoßdämpfer (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Anschlag (8) an einer Hülse (10) vorliegt, welche in das untere Rohr (4) eingesetzt ist. 4. Telescopic shock absorber (1) according to one of claims 1 to 3, characterized in that the stop (8) is present on a sleeve (10) which is inserted into the lower tube (4).
5. Teleskopstoßdämpfer (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sich vom Dämpfereinsatz (2) eine Kolbenstange (9) nach unten bis zum Boden des unteren Rohres (4) erstreckt und mit diesem verbunden ist, wobei die Kolbenstange (9) im Gehäuse (3) des Dämpfereinsatzes (2) geführt ist, wobei das Gehäuse (3) des Dämpfereinsatzes (2) jenes Bauteil, welches beim Einfedem in die Ölfüllung (6) eindringt und wobei sich das Gehäuse (3) bis zum oberen Ende des Innenraums des oberen Rohres (5) erstreckt und mit diesem verbunden ist. 5. Telescopic shock absorber (1) according to one of claims 1 to 4, characterized in that from the damper insert (2) a piston rod (9) extends down to the bottom of the lower tube (4) and is connected to it, the piston rod (9) is guided in the housing (3) of the damper insert (2), the housing (3) of the damper insert (2) being the component that penetrates into the oil filling (6) during compression and the housing (3) extending up to extends upper end of the interior of the upper tube (5) and is connected to this.
6. Teleskopstoßdämpfer (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Dämpfereinsatz (2) ein dichtes Gehäuse (3) aufweist, wobei der Dämpfereinsatz (2) eine gesonderte Ölfüllung aufweist, welche gegenüber der Ölfüllung (6) des unteren Rohres (4) abgedichtet ist. 6. Telescopic shock absorber (1) according to one of claims 1 to 5, characterized in that the damper insert (2) has a tight housing (3), wherein the damper insert (2) has a separate oil filling, which opposite the oil filling (6) of the lower tube (4) is sealed.
7. Teleskopstoßdämpfer (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das untere Ende des Gehäuses (3) des Dämpfereinsatz (2) im voll ausgefederten Zustand des Teleskopstoßdämpfers (1) oberhalb des Anschlages (8) liegt. 7. Telescopic shock absorber (1) according to one of claims 1 to 6, characterized in that the lower end of the housing (3) of the damper insert (2) in the fully rebounded state of the telescopic shock absorber (1) is above the stop (8).
8 Teleskopstoßdämpfer (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass beim Einfedern des Teleskopstoßdämpfers (1) das Gehäuse (3) des Dämpfereinsatzes (2) in die Ölfüllung (6) eintaucht, wobei zumindest zum Zeitpunkt des initialen Eintauchens Öl durch den Zwischenraum zwischen dem Gehäuse (3) und dem unteren Rohr (4) gelangt, ohne an die Feder (2) zu gelangen. 8 telescopic shock absorber (1) according to any one of claims 1 to 7, characterized in that when the telescopic shock absorber (1) is compressed, the housing (3) of the damper insert (2) is immersed in the oil filling (6), with oil at least at the time of the initial immersion passes through the space between the housing (3) and the lower tube (4) without reaching the spring (2).
9. Teleskopstoßdämpfer (1) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das obere Ende der Feder (7) am oberen Rohr (5) abgestützt ist, oder einem Anschlag, welcher einen festen Abstand zum oberen Rohr (5) aufweist und der Anschlag (8) für das untere Ende der Feder (7) einen festen Abstand zum unteren Rohr (4) aufweist. 9. Telescopic shock absorber (1) according to one of claims 1 to 8, characterized in that the upper end of the spring (7) is supported on the upper tube (5), or a stop which has a fixed distance from the upper tube (5) and the stop (8) for the lower end of the spring (7) has a fixed distance from the lower tube (4).
10. Verfahren zur Herstellung eines Teleskopstoßdämpfer (1) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass in einen herkömmlichen Teleskopstoßdämpfer (1), bei welchem die Feder (2) im ausgefederten Zustand in der Ölfüllung (6) vorliegt ein zusätzliches Element, bevorzugt in Form einer Hülse (11), ins untere Rohr (4) eingesetzt wird, welches einen Anschlag (8) für eine Feder (2) bildet, welcher Anschlag (8) im ausgefedertem Zustand oberhalb der Ölfüllung (6) liegt. 10. A method for producing a telescopic shock absorber (1) according to any one of claims 1 to 9, characterized in that an additional element is present in a conventional telescopic shock absorber (1) in which the spring (2) is in the rebounded state in the oil filling (6) , preferably in the form of a sleeve (11), is inserted into the lower tube (4), which forms a stop (8) for a spring (2), which stop (8) lies above the oil filling (6) in the spring-loaded state.
PCT/AT2020/060318 2019-08-30 2020-08-27 Telescopic shock absorber WO2021035268A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112020004117.4T DE112020004117A5 (en) 2019-08-30 2020-08-27 TELESCOPIC SHOCK ABSORBER

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50754/2019A AT522946B1 (en) 2019-08-30 2019-08-30 telescopic shock absorber
ATA50754/2019 2019-08-30

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WO2021035268A1 true WO2021035268A1 (en) 2021-03-04

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AT (1) AT522946B1 (en)
DE (1) DE112020004117A5 (en)
WO (1) WO2021035268A1 (en)

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GB191006A (en) 1923-12-28 1923-08-02 Lancia & C Improvements in or relating to hydraulic shock absorbers
GB612103A (en) * 1946-10-30 1948-11-08 Robert Nugent Lambert Improvements in or relating to spring forks for motor cycles and the like
US3912054A (en) 1974-11-25 1975-10-14 Brian K Fabre Valve replacement assembly for motorcycle front forks
DE2533173A1 (en) 1975-07-24 1977-02-03 Honda Motor Co Ltd Motorcycle front-wheel suspension - has means for restraint of compression of telescopic front upon braking
DE2841354A1 (en) 1978-09-22 1980-04-10 Bayerische Motoren Werke Ag Motorcycle hydraulic shock absorber - has floating piston between spring and hydraulic piston to reduce aeration of oil
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GB1588267A (en) 1976-09-22 1981-04-23 Kayaba Industry Co Ltd Motorcycle suspension
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WO1986004125A1 (en) 1985-01-11 1986-07-17 öHLINS RACING AB Arrangement for a spring suspension system
US6234505B1 (en) 1998-07-15 2001-05-22 Kayaba Kogyo Kabushiki Kaisha Front fork
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WO2008085097A1 (en) 2007-01-10 2008-07-17 öHLINS RACING AB Framgaffel med tätningsfunktion / front fork with sealing
EP2479097A2 (en) 2011-01-21 2012-07-25 WP Suspension Austria GmbH Telescopic suspension fork with hydraulic end stop
EP2479096A1 (en) 2011-01-21 2012-07-25 WP Suspension Austria GmbH Telescopic suspension fork strut and telescopic suspension fork with same
EP2749787A2 (en) * 2012-12-27 2014-07-02 Yamaha Motor Hydraulic System Kabushiki Kaisha Shock absorber, front fork, and saddle-ride type vehicle

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191006A (en) 1923-12-28 1923-08-02 Lancia & C Improvements in or relating to hydraulic shock absorbers
GB612103A (en) * 1946-10-30 1948-11-08 Robert Nugent Lambert Improvements in or relating to spring forks for motor cycles and the like
US3912054A (en) 1974-11-25 1975-10-14 Brian K Fabre Valve replacement assembly for motorcycle front forks
DE2533173A1 (en) 1975-07-24 1977-02-03 Honda Motor Co Ltd Motorcycle front-wheel suspension - has means for restraint of compression of telescopic front upon braking
GB1588267A (en) 1976-09-22 1981-04-23 Kayaba Industry Co Ltd Motorcycle suspension
DE2841354A1 (en) 1978-09-22 1980-04-10 Bayerische Motoren Werke Ag Motorcycle hydraulic shock absorber - has floating piston between spring and hydraulic piston to reduce aeration of oil
DE2911768A1 (en) 1979-03-26 1980-10-02 F & O Electronic Systems Vehicle hydraulic shock absorber cylinder - is adjustable by means of internal solenoid valve
DE8016907U1 (en) 1980-06-26 1980-09-18 Bayerische Motoren Werke Ag, 8000 Muenchen Hydraulic shock absorber
EP0066299A1 (en) 1981-06-03 1982-12-08 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Hydraulic telescopic shock absorber for a motor vehicle
EP0114623A1 (en) 1983-01-20 1984-08-01 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Hydraulic telescopic shock absorber for a motor vehicle, in particular for a motorcycle
WO1986004125A1 (en) 1985-01-11 1986-07-17 öHLINS RACING AB Arrangement for a spring suspension system
US4786037A (en) * 1985-01-11 1988-11-22 Mike Mills Arrangement for a spring suspension system
US6260832B1 (en) 1997-12-17 2001-07-17 Marzocchi S.P.A. Shock absorber with adjustable compression and rebound
US6234505B1 (en) 1998-07-15 2001-05-22 Kayaba Kogyo Kabushiki Kaisha Front fork
DE102005040581A1 (en) 2004-08-27 2006-03-09 Kayaba Industry Co., Ltd. front fork
DE102006006286A1 (en) 2005-02-10 2006-08-17 Yamaha Hatsudoki K.K., Iwata Vehicle e.g. motorcycle has wheel suspension system, which has first damping device, whereby detection mechanism is provided for detecting expansion or contraction force when wheel and vehicle body are shifted relative to each other
WO2008085097A1 (en) 2007-01-10 2008-07-17 öHLINS RACING AB Framgaffel med tätningsfunktion / front fork with sealing
EP2479097A2 (en) 2011-01-21 2012-07-25 WP Suspension Austria GmbH Telescopic suspension fork with hydraulic end stop
EP2479096A1 (en) 2011-01-21 2012-07-25 WP Suspension Austria GmbH Telescopic suspension fork strut and telescopic suspension fork with same
EP2749787A2 (en) * 2012-12-27 2014-07-02 Yamaha Motor Hydraulic System Kabushiki Kaisha Shock absorber, front fork, and saddle-ride type vehicle

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AT522946B1 (en) 2022-01-15
AT522946A1 (en) 2021-03-15

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