DE102015213306B4 - Vibration damper with carbon fiber damper tube for motor vehicles - Google Patents

Abstract

Shock absorber for a vehicle, comprising at least one damper tube (2) and a load introduction element (3) connected to the damper tube (2), wherein at least one shock absorber piston can be slidably guided in the damper tube (2) and wherein the damper tube (2) is made of a carbon fiber composite material is formed, characterized in that the at least one load introduction element (3) is formed from a carbon fiber composite material and the damper tube (2) is formed in one piece with the at least one load introduction element (3), wherein between the damper tube (2) and the at least one load introduction element ( 3) at least one fluid-impermeable connection is formed, which closes the damper tube (2) in a fluid-tight manner and wherein the at least one load introduction element (3) has at least one fastening element.

Description

The present invention relates to a shock absorber, a damper tube for vehicle shock absorbers, a load entry element for connection to a damper tube, a method for producing a damper tube and the use of a damper tube for a vehicle shock absorber.

State of the art

Vehicle shock absorbers with damper tubes are known in the prior art in a large number of embodiments. In particular, lightweight designs are known for single-tube dampers, which have damper tubes made of aluminum or carbon fiber reinforced plastic (CFRP). Damper tubes made of CFRP usually do not have a metallic functional or running surface and, compared to metallic materials, enable weight to be reduced with at least the same strength properties. The damper tubes are attached to the body and / or the wheel suspension / wheel carrier of a vehicle via load entry elements, these load entry elements being made in particular of metallic materials and being fastened, for example, with threaded and / or snap ring connections with inlets arranged on the CFRP damper tubes , When connecting the load entry elements to the CFRP damper tubes, the possibility should be guaranteed to be able to introduce operating loads into the tube structure in a fiber-compatible manner.

From the DE 103 13 477 B3 a cylinder tube for a working cylinder is known, and the cylinder tube has an inner tube made of thermoplastic and an outer tube which coaxially surrounds the inner tube and is made of a fiber-reinforced thermoplastic. This fiber-reinforced plastic can be a carbon fiber composite material, for example.

From the DE 10 2011 109 362 A1 a shock absorber for a vehicle with a shock absorber tube made of a carbon fiber composite material is known, the shock absorber tube having a coating on the inside.

From the DE 10 2014 106 860 A1 a method for producing a damper tube made of a fiber composite material for a vibration damper is known.

From the DE 10 2013 108 259 A1 a method for producing tubular fiber composite bodies is known.

From the DE 10 2006 062 414 A1 a cylinder tube for a hydraulic cylinder made of fiber composite material and method for its production is known.

The present invention is therefore based on the object of providing an improved shock absorber and / or a damper tube for vehicle shock absorbers and an improved method for producing a damper tube, in which the aforementioned disadvantages are avoided. In particular, with this improved shock absorber and / or damper tube for vehicle shock absorbers and the improved method for producing a damper tube, fiber-appropriate introduction of operating loads into the tube structure of the damper tube should be possible. Furthermore, compared to conventional shock absorbers, a weight reduction of the improved shock absorber and / or damper tube is to be made possible. In addition, a vehicle shock absorber with a reduced corrosion potential, reduced partial and unsprung masses and increased driving comfort is to be made available. Furthermore, this improved shock absorber and / or damper tube is intended to ensure a simple and reliable sealing function. In addition, the connection between the damper tube and the load input element as well as the load input element and the associated damper tube of the vehicle shock absorber should be stable in temperature ranges which are prevailing on the wheel suspension / wheel carrier. Furthermore, the improved method for manufacturing a damper tube is intended to provide a stable and simplified manufacturing process with a reduced number of manufacturing steps and manufacturing parts.

Disclosure of the invention

This object is achieved with a shock absorber according to claim 1, a damper tube for a vehicle shock absorber according to claim 3, a method according to claim 4 and a use of a damper tube for a vehicle shock absorber according to claim 8.

The shock absorber according to the invention for vehicles, comprising at least one damper tube and a load introduction element connected to the damper tube, has the advantage over conventional shock absorbers that operating loads are introduced into the tube structure of the damper tube in a fiber-appropriate manner. Another advantage of the shock absorber according to the invention is that the weight of the damper tube according to the invention is reduced compared to conventional shock absorbers. In addition, the shock absorber according to the invention has reduced parts and unsprung masses and provides increased driving comfort. Furthermore the shock absorber according to the invention with the damper tube according to the invention has the advantage of a reduced corrosion potential and a simple and reliable sealing function. In addition, the shock absorber according to the invention is stable in temperature ranges which prevail on the wheel suspension / wheel carrier.

The method according to the invention for producing a damper tube for a shock absorber, in particular for producing CFRP damper tubes for vehicles, has the advantage over conventional methods of a stable and simplified manufacturing process with a reduced number of manufacturing steps and manufacturing parts. Another advantage of the method according to the invention is that it can be easily and reliably integrated into existing methods.

The invention therefore relates to a shock absorber for a vehicle, comprising at least one damper tube and a load introduction element connected to the damper tube, wherein at least one shock absorber piston can be slidably guided in the damper tube and the damper tube is formed from a carbon fiber composite material, the at least one load introduction element being made of is formed from a carbon fiber composite material and the damper tube is formed in one piece with the at least one load introduction element, at least one fluid-impermeable connection being formed between the damper tube and the at least one load introduction element, which fluid-tight closure of the damper tube and wherein the at least one load introduction element has at least one fastening element.

Another object of the invention is a damper tube for a vehicle shock absorber, comprising at least one load introduction element connected to the damper tube, wherein at least one shock absorber piston can be slidably guided in the damper tube and the damper tube is made of a carbon fiber composite material, the at least one load introduction element made of a carbon fiber composite material is formed and the damper tube is formed in one piece with the at least one load introduction element, at least one fluid-impermeable connection being formed between the damper tube and the at least one load introduction element, which fluid-tight closure of the damper tube and wherein the at least one load introduction element has at least one fastening element.

The invention can be implemented both in the shock absorber for a vehicle and in a damper tube for a vehicle shock absorber, as well as in a load introduction element connected to a damper tube.

1. a) Bereitstellen eines oder mehrerer stabförmiger Wickelkerns/e;
2. b) Bereitstellen eines oder mehrerer Lasteinleitungselementkerns/e;
3. c) Bereitstellen mindestens eines Trennmittels;
4. d) Bereitstellen mindestens eines benetzten Kohlefaserfilaments;
5. e) Auftragen des in Schritt c) bereitgestellten Trennmittels wenigstens teilweise auf die Mantelfläche des/der in Schritt a) bereitgestellten stabförmigen Wickelkerns/e;
6. f) Anordnen des oder der in Schritt b) bereitgestellten Lasteinleitungselementkerns/e an dem und/oder zwischen den in Schritt a) bereitgestellten stabförmigen Wickelkern/en;
7. g) Umwickeln des/der in Schritt f) an dem oder zwischen den stabförmigen Wickelkern/en angeordneten Lasteinleitungselementkerns/en, mit dem in Schritt d) bereitgestellten mindestens einen benetzten Kohlefaserfilament,

wobei mit dem Umwickeln in Schritt g) das Dämpferrohr als eine Grundform mit dem mindestens einen Lasteinleitungselement einstückig ausgebildet wird, wobei in einem weiteren Schritt h) zwischen den in Schritt a) bereitgestellten mehreren stabförmigen Wickelkernen auf der der in Schritt f) angeordneten Lasteinleitungselementkerns/e abgewandten Seite wenigstens ein Verbindungselement angeordnet wird, wobei in einem weiteren Schritt k) ein Befestigungselement an dem wenigstens einen Verbindungselement ausgebildet wird.Another object of the invention is a method for producing a damper tube for a shock absorber, comprising the steps:

1. a) providing one or more rod-shaped winding core / s;
2. b) providing one or more load introduction element core / s;
3. c) providing at least one release agent;
4. d) providing at least one wetted carbon fiber filament;
5. e) applying the release agent provided in step c) at least partially to the outer surface of the rod-shaped winding core (s) provided in step a);
6. f) arranging the load introduction element core (s) provided in step b) on and / or between the rod-shaped winding core (s) provided in step a);
7. g) wrapping the load introduction element core (s) arranged on or between the rod-shaped winding core (s) in step f) with the at least one wetted carbon fiber filament provided in step d),

wherein with the wrapping in step g) the damper tube is formed in one piece as a basic shape with the at least one load introduction element, in a further step h) between the several rod-shaped winding cores provided in step a) on that of the load introduction element core / e arranged in step f) at least one connecting element is arranged on the side facing away, a fastening element being formed on the at least one connecting element in a further step k).

Another object of the invention is the use of a damper tube for a vehicle shock absorber, the damper tube comprising at least one load introduction element connected to the damper tube and wherein at least one shock absorber piston can be slidably guided in the damper tube and wherein the damper tube is made of a carbon fiber composite material, the at least a load introduction element is formed from a carbon fiber composite material and the damper tube is formed in one piece with the at least one load introduction element, at least one fluid-impermeable connection being formed between the damper tube and the at least one load introduction element, which fluid-tight closure of the damper tube and wherein the at least one load introduction element has at least one fastening element.

Detailed description of the invention

In the context of the present invention, a damper tube is understood to mean a shock absorber tube in which at least one shock absorber piston can be guided in a sliding manner. In the prior art, the term carbon fiber composite is also known as carbon fiber reinforced plastic (CFRP), carbon fiber reinforced plastic (CFRP), or carbon fiber reinforced plastic (CFRP). In the context of the present invention, a carbon fiber composite material is understood to mean a material composite composed of at least two components, a first carbon fiber component being embedded in a matrix as a second component. In particular, carbon fibers are embedded in a plastic matrix in the carbon fiber composite material according to the invention. The matrix is used in particular to connect the carbon fibers and to fill gaps. Systems which are selected from plastic resins, in particular vinyl esters, epoxy resin and polyurethane, thermosets, thermoplastics, in particular polyamides, such as, for example, polyamide 6.6, polyaryl ether ketones, such as, for example, polyether ether ketone, polyethyleneimines and combinations thereof, can be used as plastic matrix materials, for example.

The fastening of the damper tubes to the body and / or the / the wheel suspension / wheel carrier of a vehicle is usually carried out via load entry elements, whereby in the context of the present invention, a load introduction element is understood to be an element which is technically connected to the damper tube and operating loads in the tube structure of the Initiates damper tube. The damper tube according to the invention is formed in one piece with at least one load introduction element, whereby in the context of the present invention, one piece is understood to mean that elements do not necessarily have to be produced from a single and uniform part, but these elements are not only firmly but are intimately connected to one another, that they do not appear as several elements joined together and, in any case, can no longer be separated from one another without being destroyed. In particular, the elements can consist of different materials. The intimate connection of the elements can take place, for example, by form, force and / or material connection. For example, the at least one load introduction element according to the invention can also be integrated in a damper tube.

In a further preferred embodiment of the invention, the at least one damper tube at least partially formed from a carbon fiber composite material is formed in one piece with the at least one load introduction element. In a one-piece design of the damper tube according to the invention with the at least one load introduction element, the damper tube and the at least one load introduction element are necessarily produced in a single and uniform part.

In a preferred embodiment of the invention, the at least partially formed carbon fiber composite material has a continuous course of the carbon fiber composite material at least between the damper tube and the at least one load introduction element. In the context of the present invention, a continuous course of the carbon fiber composite material means a continuous arrangement of the carbon fiber component of the carbon fiber composite material. In particular, in the case of a continuous course, the carbon fiber component of the carbon fiber composite material has no at least partial severing and / or interruption. For example, a continuous course of the carbon fiber composite material is produced in a winding process in which the carbon fiber component of the carbon fiber composite material is provided in a single part. The one part can in particular be wound on a spool, such as a yarn or filament spool.

In a preferred embodiment of the invention, the at least one load introduction element connected to the damper tube is arranged on the end of the damper tube.

According to the invention, at least one liquid-impermeable connection is formed between the damper tube and the at least one load introduction element, which connection seals the damper tube in a liquid-tight manner. Advantageously, a damper tube can therefore contain liquids, such as, for example, lubricating liquid (s) and / or damping liquid (s) and combinations thereof.
In a further embodiment of the invention, at least one fluid-impermeable connection, which closes the damper tube in a fluid-tight manner, is formed at least between the damper tube and the at least one load introduction element. A damper tube can thus advantageously contain fluids, such as damping medium / s and / or volume compensation medium / s and combinations thereof.

In a preferred embodiment of the invention, the at least one load introduction element has at least one fastening element. In the context of the invention, a fastening element is understood to mean an element with which the at least one load introduction element on a wheel carrier or the body of a vehicle can be at least non-positively attached. For example, a fastener is selected from a bore, eye, fork, and combinations thereof. In particular, the at least one load introduction element can also be fastened in a form-fitting manner to a wheel carrier, handlebar and / or the body of a vehicle and, for example, selected from a clamp seat, a wedge connection and a combination thereof.
In a preferred embodiment of the invention, the damper tube, which is at least partially formed from a carbon fiber composite material, is produced in one piece with the at least one load introduction element.
In the context of the present invention, a winding core is understood to mean a shaping element on which a winding web, in particular a web made of wetted carbon fiber filament, is wound.
In the context of the present invention, a load introduction element core is understood to mean a shaping element on which a winding web, in particular a web made of wetted carbon fiber filament, is wound.
In the context of the present invention, a release agent is understood to mean a composition which at least partially reduces the adhesive force between the outer surface of a winding core according to the invention and the wetted carbon fiber filament wound around the outer surface according to the invention. Examples of a release agent according to the invention are known as waxes and / or film release agents and combinations thereof.
In the context of the present invention, a carbon fiber filament is understood to mean a carbon fiber. For example, 1,000 to 24,000 carbon fiber filaments can be combined to form a multifilament yarn (roving) that is wound up and used in particular in further processing in winding machines. In the context of the present invention, wetting means the contacting of surfaces of a body with at least one liquid component. A large number of processes for wetting are known in the prior art, such as, in particular, vacuum injection, impregnation processes, for example prepreg processes, gap impregnation, lamination processes and combinations thereof. For example, carbon fiber filaments can also be wetted in an immersion bath.

1. a) Bereitstellen eines oder mehrerer stabförmiger Wickelkerns/e;
2. b) Bereitstellen eines oder mehrerer Lasteinleitungselementkerns/e;
3. c) Bereitstellen mindestens eines Trennmittels;
4. d) Bereitstellen mindestens eines benetzten Kohlefaserfilaments;
5. e) Auftragen des in Schritt c) bereitgestellten Trennmittels wenigstens teilweise auf die Mantelfläche des/der in Schritt a) bereitgestellten stabförmigen Wickelkerns/e;
6. f) Anordnen des oder der in Schritt b) bereitgestellten Lasteinleitungselementkerns/e an dem und/oder zwischen den in Schritt a) bereitgestellten stabförmigen Wickelkern/en;
7. g) Umwickeln des/der in Schritt f) an dem oder zwischen den stabförmigen Wickelkern/en angeordneten Lasteinleitungselementkerns/en, mit dem in Schritt d) bereitgestellten mindestens einen benetzten Kohlefaserfilament,

wobei mit dem Umwickeln in Schritt g) ein kontinuierlicher Verlauf des benetzten Kohlefaserfilaments wenigstens zwischen dem Dämpferrohr in einer Grundform und dem mindestens einen Lasteinleitungselement ausgebildet wird, wobei in einem weiteren Schritt h) zwischen den in Schritt a) bereitgestellten mehreren stabförmigen Wickelkernen auf der der in Schritt f) angeordneten Lasteinleitungselementkerns/e abgewandten Seite wenigstens ein Verbindungselement angeordnet wird, wobei in einem weiteren Schritt k) ein Befestigungselement an dem wenigstens einen Verbindungselement ausgebildet wird.Another embodiment of the invention is a method for producing a damper tube for a shock absorber, comprising the steps:

1. a) providing one or more rod-shaped winding core / s;
2. b) providing one or more load introduction element core / s;
3. c) providing at least one release agent;
4. d) providing at least one wetted carbon fiber filament;
5. e) applying the release agent provided in step c) at least partially to the outer surface of the rod-shaped winding core (s) provided in step a);
6. f) arranging the load introduction element core (s) provided in step b) on and / or between the rod-shaped winding core (s) provided in step a);
7. g) wrapping the load introduction element core (s) arranged on or between the rod-shaped winding core (s) in step f) with the at least one wetted carbon fiber filament provided in step d),

whereby with the wrapping in step g) a continuous course of the wetted carbon fiber filament is formed at least between the damper tube in a basic form and the at least one load introduction element, in a further step h) between the several rod-shaped winding cores provided in step a) on that in At least one connecting element is arranged in step f) of the load introduction element core / e facing away from the side, in a further step k) a fastening element is formed on the at least one connecting element.

In the context of the present invention, a damper tube is also understood to mean a damper tube in a basic form. A damper tube in a basic form comprises a geometric shape of a tube, in which the damper tube is not necessarily fixed in such a way that it automatically maintains the tube geometry. For example, a damper tube has not yet been solidified in its basic form and is supported in its geometric shape by a winding core.

In a preferred embodiment of the invention, the sequence of steps a) to d) is arbitrary.

In a preferred embodiment of the invention, the arrangement in step f) of the load introduction element core (s) provided in step b) is carried out at the end of the rod-shaped winding core (s) provided in step a).

In a further embodiment of the invention, in a further step i), the at least one wetted carbon fiber filament wrapped in step g) is solidified to form a carbon fiber composite material.

In the context of the present invention, the transition of the plastic matrix, in particular the wetting agent, from one to solidifying liquid in a solid state, understood. For example, depending on the choice of plastic matrix / wetting agent, the solidification can be initiated chemically and / or by process parameters. Heating processes, cooling processes, radiation types and intensities can be exemplified as process parameters. In particular, solidification takes place through crosslinking processes and is also referred to as curing. For example, chemical curing of thermosetting resin systems or cooling of thermoplastics from the molten state can take place.

In a preferred embodiment of the invention, in a further step j), the one or more load introduction element core (s) and / or the at least one connecting element arranged in step h) are severed, with the formation of damper tubes each comprising a load introduction element.

For example, cutting can be carried out with a cutting tool, knife tool, splitting tool and combinations thereof, sawing with a sawing tool, material jet cutting, in particular water jet cutting and combinations thereof.

In particular, the fastening element formed on the at least one connecting element in step k) is drilled, milled, punched and combinations thereof.

list of figures

• 1 zeigt schematisch eine Anordnung von Wickelkernen, einem Lasteinleitungselementkern und einem Verbindungselementkern zur Bereitstellung in einer Wickelanlage gemäß einer Ausführungsform der Erfindung,
• 2 zeigt schematisch den Wickelvorgang eines benetzten Kohlefaserfilaments auf eine Anordnung umfassend einen zwischen Wickelkernen angeordneten Lasteinleitungselementkerns gemäß einer Ausführungsform der Erfindung,
• 3 zeigt schematisch ein Dämpferrohr für Fahrzeugstoßdämpfer umfassend ein Lasteinleitungselement gemäß einer Ausführungsform der Erfindung.

The shock absorber according to the invention, the damper tube according to the invention for vehicle shock absorbers, the load entry element according to the invention for connection to a damper tube and the method according to the invention for producing a damper tube are explained with reference to the drawings.

• 1 schematically shows an arrangement of winding cores, a load introduction element core and a connecting element core for provision in a winding installation according to an embodiment of the invention,
• 2 schematically shows the winding process of a wetted carbon fiber filament on an arrangement comprising a load introduction element core arranged between winding cores according to an embodiment of the invention,
• 3 schematically shows a damper tube for vehicle shock absorbers comprising a load introduction element according to an embodiment of the invention.

In the 1 is an arrangement of winding cores 6 . 6 ' . 6 " , a load introduction element core 4 and a connector core 7 shown according to an embodiment of the invention. An arrangement of the connector core 7 between the winding cores 6 ' . 6 " enables the elements to be wrapped with a winding system to be extended and adapted to the winding width of a winding system. One of the winding cores 6 . 6 ' which is in direct contact with the load introduction element core 4 stands forms a winding core for a damper tube according to the invention that can be produced by wrapping.

In the 2 is the arrangement of the load introduction element core 4 between the winding cores 6 . 6 ' shown, with a traversing winding head 10 a wetted carbon fiber filament 8th is wound on the arrangement. An edge area of the winding cores 6 ' is already from the wetted carbon fiber filament 8th wraps around and forms an area 9 the with wetted carbon fiber filament 8th partially wrapped winding core 6 ' , The traversing movement of the winding head 10 is possible, for example, in the coordinate system shown.

In the 3 is a damper tube with load introduction element 1 consisting of the damper tube 2 and the load introduction element 3 shown. In the load introduction element 3 is a fastener 5 , especially arranged as an eye. For example, the fastener 5 attached to a wheel suspension or a vehicle body.

In the 4 is the damper tube with load introduction element 1 consisting of the damper tube 2 and the load introduction element 3 shown. In the load introduction element 3 is a fastener 5 , in particular arranged as a fork.

Industrial applicability

Shock absorbers for a vehicle and damper tubes for vehicle shock absorbers, as well as load introduction element for connection to damper tubes, of the type described above are used in the production of motor vehicles, in particular chassis of motor vehicles.

LIST OF REFERENCE NUMBERS

1 =

Damper tube with load introduction element

2 =

damper tube

3 =

Load introduction element

4 =

Load introduction element core

5 =

fastener

6. 6 ', 6 "=

winding core

7 =

connecting element

8 =

wetted carbon fiber filament

9 =

Area of a winding core partially wrapped with wetted carbon fiber filament

10 =

winding

R =

direction of rotation

L =

longitudinal axis

Claims (8)

Shock absorber for a vehicle, comprising at least one damper tube (2) and a load introduction element (3) connected to the damper tube (2), wherein at least one shock absorber piston can be slidably guided in the damper tube (2) and wherein the damper tube (2) is made of a carbon fiber composite material is formed, characterized in that the at least one load introduction element (3) is formed from a carbon fiber composite material and the damper tube (2) is formed in one piece with the at least one load introduction element (3), wherein between the damper tube (2) and the at least one load introduction element ( 3) at least one fluid-impermeable connection is formed, which closes the damper tube (2) in a fluid-tight manner, and the at least one load introduction element (3) has at least one fastening element. Shock absorber after Claim 1 , characterized in that the at least partially formed carbon fiber composite material has a continuous course of the carbon fiber composite material at least between the damper tube (2) and the at least one load introduction element (3). Damper tube (2) for a vehicle shock absorber, comprising at least one load introduction element (3) connected to the damper tube (2), wherein at least one shock absorber piston can be slidably guided in the damper tube (2) and the damper tube (2) is made of a carbon fiber composite material, characterized in that the at least one load introduction element (3) is at least partially made of a carbon fiber composite material and the damper tube (2) is formed in one piece with the at least one load introduction element (3), wherein between the damper tube (2) and the at least one load introduction element (3 ) at least one fluid-impermeable connection is formed, which closes the damper tube (2) in a fluid-tight manner and wherein the at least one load introduction element (3) has at least one fastening element. Method for producing a damper tube (2) for a shock absorber according to one of the Claims 1 to 2 , comprising the steps: a) providing one or more rod-shaped winding core / s (6, 6 ', 6 "); b) providing one or more load introduction element core / s (4); c) providing at least one release agent; d) providing at least one wetted carbon fiber filament (8); e) applying the release agent provided in step c) at least partially to the outer surface of the rod-shaped winding core (s) (6, 6 ', 6 ") provided in step a); f) arranging the load introduction element core (s) (4) provided in step b) on and / or between the rod-shaped winding core (s) (6, 6 ', 6 ") provided in step a); g) wrapping the / in Step f) on or between the rod-shaped winding core (s) (6, 6 ', 6 ") arranged load introduction element core (s) (4), with the at least one wetted carbon fiber filament (8) provided in step d), with the wrapping in step g) the damper tube (2) is formed in one piece as a basic shape with the at least one load introduction element (3), in a further step h) between the several rod-shaped winding cores (6, 6 ', 6 ") provided in step a) on the at least one connecting element (7) is arranged on the side facing away from the load introduction element core (s) (4), characterized in that in a further step k) a fastening element is formed on the at least one connecting element becomes. Method for manufacturing a damper tube (2) according to Claim 4 , the order of steps a) to d) is arbitrary. Method for producing a damper tube (2) according to one of the Claims 4 to 5 , characterized in that in a further step i) the at least one wetted carbon fiber filament (8) wrapped in step g) is solidified to form a carbon fiber composite material. Method for producing a damper tube (2) according to one of the Claims 4 to 6 , characterized in that in a further step j) a severing of the one or more load introduction element core / s and / or the at least one connecting element (7) arranged in step h) to form damper tubes (2) each comprising a load introduction element (3 ), is carried out. Use of a damper tube (2) for a vehicle shock absorber, the damper tube (2) comprising at least one load introduction element (3) connected to the damper tube (2) and wherein at least one shock absorber piston can be slidably guided in the damper tube (2) and the damper tube ( 2) is formed from a carbon fiber composite material, characterized in that the at least one load introduction element (3) is made from a carbon fiber composite material and the damper tube (2) is formed in one piece with the at least one load introduction element (3), with between the damper tube (2) and the at least one load introduction element (3) is formed with at least one fluid-impermeable connection, which seals the damper tube (2) in a fluid-tight manner, and wherein the at least one load introduction element (3) has at least one fastening element.

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