EP1494254A1 - Force transmission element, method and apparatus for producing it - Google Patents

Abstract

Element (1) comprises either an adhesive connection (5) or packing material for fixing connecting pieces (2, 3) to an insulating tube (4). The adhesive connection is formed by cone inserted into one end of the insulating tube and guided from a casing surface (7) onto the inner surface (8) of the insulating tube and formed by a counter cone (9) inserted into one of the connecting pieces. A gap is formed by the cone and counter cone and is filled with adhesive. Independent claims are also included for the following: (1) process for the production of the power transfer element; and (2) device for producing the power transfer element.

Description

TECHNICAL AREA

The invention is based on an element for transmission mechanical force in a rotary and / or pushing movement according to the preamble of claim 1. This power transmission element is axially symmetrical formed and contains two feasible to different electrical potentials Connecting pieces of electrically conductive material as well as a torsion and / or Tensile loadable tube made of an electrically insulating material on the base a fiber reinforced polymer. The two connectors are each on attached to one of both ends of the insulating tube. From a drive in one of both Connection introduced force is transmitted through the insulating tube to the second Transfer connector and guided from there to an actuator. Because of the arranged between the two connectors insulating Both connectors can be at different electrical potentials be held, so that such a power transmission element mainly in high-voltage electrical apparatus, in particular switches, as Push rod or can be used as a rotary shaft.

The invention also relates to a method for producing such Power transmission element and a device for carrying out the Process.

STATE OF THE ART

With the generic term, the invention takes a prior art of Power transmission elements reference, as described in DE 33 22 132 A1. An illustrated in this patent publication and as a push rod used power transmission element has an electrically insulating, fiber-reinforced plastic rod on. In at least one of both ends of the Plastic rods are formed in tapers, in which projections one as Protruding sleeve executed end portion of a steel connection fitting.

The projections are after attaching the sleeve to the end of the rod generated by rolling the sleeve. This is when a pushing movement Positive connection between the plastic rod and the connection fitting achieved. Furthermore, by adhesive, which in between a sleeve and rod end formed gap is cleared, clearance between rod and fitting and so the adhesion improved.

A power transmission element, in which two metal connection fittings are spaced apart by an insulating tube based on LCP material, is described in EP 899 764 A1. Adhesion between the fittings and the Insulating tube is achieved by press fit and / or by gluing.

PRESENTATION OF THE INVENTION

The invention as defined in claims 1 to 19 solves the Task to provide a power transmission element of the type mentioned, which is characterized by a good transmission behavior, especially when occurring great torque, and a method by which such Power transmission element can be produced in a particularly gentle manner can specify, as well as a device for carrying out the method.

In a first embodiment of the invention, a good Transmission behavior of the force transmission element by an adhesive bond achieved, which is formed by a molded into one end of the insulating tube Cone, which is guided by the lateral surface on the inner surface of the insulating tube as well as from a formed in one of the two fittings counter-cone and of a cone and counter cone formed and filled with adhesive Gap. Characterized in that the adhesive gap from the inner surface of the insulating tube whose lateral surface extends, both when pulling and when turning Force from the adhesive bond directly in all existing in the pipe cross-section Fibers introduced. As a result, strong shear forces are avoided, which at Power transmission elements occur in the prior art, in which a Adhesive gap is provided only between fitting and lateral surface.

In the first embodiment of the invention, the fiber reinforcement of the Isolierrohrs formed by winding layerwise deposited fibers, so should the Cone the layers at an angle of about 10 to 30 °, relative to the axis of the insulating pipe, cut. It has been shown that then the adhesive layer to transferring force particularly uniformly into practically all fiber layers, whereby in particular the transmission of large torques in particular is favored effectively.

As in the execution of the fastener as an adhesive bond one of the Inner surface of the insulating tube and the fittings limited cavity in the Power transmission element is present, it is recommended, undesirably high Pressure in the cavity through a guided from the outside into the cavity Reduce pressure equalization channel.

In a second embodiment of the invention is a good Transmission behavior of the force transmission element by an embedding achieved, which is a part to be embedded in the direction of the axis of the Isolierrohrs extended portion of one of the two connecting pieces and as embedding the end portion of the manufactured in a casting process Insulating tube. By embedding form fit and freedom of play between achieved the embedded connector and the insulating tube and can so high tensile forces and torques independent of an adhesive bond be transmitted. Since this power transmission element produced by casting is, accounts for a machining of the insulating tube and a Gluing the fittings and it can be done by very precise control of the Casting a good quality of the insulating tube and thus the Power transmission element, especially with regard to its dielectric and mechanical properties are achieved.

To one for solving a special transfer task particularly favorable To achieve positive engagement is in the second embodiment of the invention of embedded portion of the connector designed as a positive connection element. Indicates the interlocking element in the circumferential direction about the axis of the insulating tube a profile deviating from a circle, it is for example in the manner of a Polygons trained, so is a particularly good transmission behavior in Occurrence of large torques achieved, as for example by a Drive shaft for a contact system of a high current device is required.

Conveniently, in the second embodiment of the Power transmission element according to the invention at least one of Connecting pieces guided in the direction of the axis of the insulating tube Longitudinal channel up. An in the manufacture of the insulating tube to support the inner wall used elastic molded body can after the manufacturing process by this channel will be removed.

Is the fiber reinforcement of the insulating layer stored by winding layered Fibers is formed, so it is recommended, in addition radially through the fiber layers provide guided reinforcing fibers. With a share of predominantly radial guided reinforcing fibers of about 0.5 to 5%, preferably 1 to 3%, the Fiber reinforcement thus becomes a particularly high torsional strength of the insulating tube and thus also reaches the power transmission element.

(1) aus den Anschlussstücken und einem rohrförmigen Faserkörper wird ein dem zu fertigen Kraftübertragungselement hinsichtlich seiner geometrischen Abmessungen weitgehend entsprechender Vorläuferkörper gebildet,

(2) der Faserkörper und ein Abschnitt des Vorläuferkörpers, welcher vom Faserkörper umhüllte Teile der beiden Anschlussstücke umfasst, wird in eine Giessform gebracht,

(3) der Faserkörper wird in der Giessform mit flüssigem Polymer getränkt, und

(4) der polymergetränkte Faserkörper wird unter Bildung des die Anschlussstücke festsetzenden Isolierrohrs gehärtet.

A method with which the second embodiment of the invention can be produced particularly simply is characterized by the following method steps:

(1) from the connecting pieces and a tubular fiber body, a precursor body which largely corresponds to the finished force transmission element with regard to its geometric dimensions is formed,

(2) the fibrous body and a portion of the precursor body comprising parts of the two fittings enveloped by the fibrous body are placed in a mold,

(3) the fiber body is soaked in the mold with liquid polymer, and

(4) the polymer-impregnated fiber body is hardened to form the insulating tube fixing the fittings.

This process eliminates one of the manufacturing process of Kraftübertragungselements decoupled production of the insulating tube, a Machining the insulating tube as well as gluing the Fittings. Since the manufacturing process of the insulating tube immediately part the manufacturing process of the power transmission element, the Production parameters are controlled very precisely, ensuring good quality of the power transmission element, in particular with regard to its dielectric and mechanical properties, is achieved.

In a preferred embodiment of this method, before the introduction in a mold, the inner surface and the lateral surface of the tubular Fiber body supported with elastic, gas and liquid-tight moldings. In carrying out the method, then the shaping process of the Isolierrohrs are influenced controlled. At the same time, after curing, the Moldings are removed without damage after elastic deformation.

It is advantageous to provide the lateral surface supporting elastic molded body the application to the fiber body in the radial direction to stretch. These Measure facilitates the application of the molding on the fiber body and even allows the fiber body with a the shaping of the insulating tube and thus also the power transmission element favorably influencing Pretension to apply.

Shaping and above all quality of the insulating tube and thus of the Force transmission element can be influenced in a particularly favorable manner, when the moldings are subjected to pressure during curing. Depending on The amount of pressure here are unavoidable gas bubbles in the liquid Polymer, in the fiber body or to be embedded sections of the Compression pieces largely suppressed by compression and so the dielectric properties of the power transmission element quite essential improved.

To be a mechanically very stable with simple means To achieve force transmission element, the fiber body should by winding several fiber layers are made on a winding core and should the Winding core of the fittings and the inner surface of the fiber body be formed supporting elastic molded body.

Be in addition in the manufacture of the fiber body by the fiber layers guided predominantly radially oriented reinforcing fibers, so is the Torsional strength of the power transmission element with comparatively simple Means significantly improved.

To the inner surface of the fiber body supporting elastic molded body It is recommended to reuse one of the two connectors hollow form. The molding can then be cured after curing in general duromer or thermoplastic polymer and elastically deformed by the Cavity to be removed to the outside non-destructively. An intrusion of liquid polymer in the cavity when soaking the fiber body is avoided when the inner surface of the fiber body supporting elastic Molded body is impregnated with compressed gas prior to impregnation.

An advantageous device for carrying out the inventive Method comprises a mold having at least five openings, of which serve a first and a second of the implementation of the two connectors, a third of the feed of the liquid polymer serves, a fourth of the venting of the Casting mold and a fifth of the supply of compressed gas, which compressed gas during Hardening of the liquid polymer forming the impregnated fiber body acts.

Preferably, the device also includes a winding tool with a Winding core, which of the two connectors and one between the two connecting pieces arranged elastic molded body is formed and the inclusion of the fiber body is used. The device also advantageously has a Aufschrumpfwerkzeug on with a hollow cylindrical running Vacuum chamber whose two end faces each have an opening for the implementation of with the fiber body wound winding core included and one inside the Chamber arranged, radially extending and the opening comprehensive sealing surface, on which the annular edge of a hollow cylindrical running, elastic molded body is supported vacuum-tight.

DESCRIPTION OF THE DRAWINGS

Fig.1

eine Seitenansicht einer als Welle ausgebildeten ersten Ausführungsform des Kraftübertragungselements nach der Erfindung, bei der ein Isolierrohr axial geschnitten dargestellt ist,

Fig.2

eine Seitenansicht einer als Welle ausgebildeten zweiten Ausführungsform des Kraftübertragungselements nach der Erfindung, bei der ein Isolierrohr ebenfalls geschnitten dargestellt ist,

Fig.3

eine Aufsicht in Pfeilrichtung auf einen längs III - III geführten Schnitt durch die (vergrössert dargestellte) Welle nach Fig.2,

Fig.4

eine schematische Darstellung einer Vorrichtung zur Herstellung der Welle nach Fig.2,

Fig.5

eine Aufsicht auf einen axial und parallel zur Zeichnungsebene geführten Schnitt durch eine Giessform der Vorrichtung nach Fig.4, und

Fig.6

eine vergrösserte Darstellung eines Teils der Giessform nach Fig.5.

Preferred embodiments of the invention and the advantages that can be achieved thereby are explained in more detail below with reference to drawings. Hereby shows:

Fig.1

a side view of a formed as a shaft first embodiment of the power transmission element according to the invention, in which an insulating tube is shown axially cut,

Fig.2

a side view of a shaft formed as a second embodiment of the power transmission element according to the invention, in which an insulating tube is also shown cut,

Figure 3

a view in the direction of the arrow on a longitudinal III - III guided section through the (enlarged) wave of Figure 2,

Figure 4

a schematic representation of an apparatus for producing the shaft of Figure 2,

Figure 5

a plan view of a guided axially and parallel to the plane of the drawing section through a mold of the device according to Fig.4, and

Figure 6

an enlarged view of a part of the mold according to Fig.5.

WAYS FOR CARRYING OUT THE INVENTION

In all figures, like reference numerals designate like-acting parts. The in the figures 1 and 2 embodiments shown as a shaft first trained power transmission element according to the invention each contain two executable to different electrical potentials connectors 2, 3 from electrically conductive material, such as aluminum, as well as a torsion resilient tube 4 made of an electrically insulating material based on a fiber reinforced polymer with good mechanical, thermal and electrical properties Properties. As reinforcing fibers are mainly plastic fibers, such as based on aramid or polyester, but also inorganic fibers, such as Glass fibers, into consideration. For manufacturing reasons and reasons good mechanical strength in the transmission of torques it is convenient to use fibers which are arranged in a layer in which the Fibers at an angle of about 30 ° to 60 °, typically about 45 ° to the axis the shaft are arranged. Instead of being able to lay as fiber reinforcement In principle however also fabrics or mats can be used or can Fibers by means of a winding process stranded deposited. As a polymer Especially resins based on epoxy or polyester come into consideration. to It may be advantageous to improve the adhesion of the polymeric resin the portions of the connecting pieces 2, 3 surrounded by fibers with a primer to coat. The two connecting pieces 2, 3 are each at one of both ends attached to the insulating tube 4. Such a wave 1 can, for example, with the Connector 2 held at ground potential and with the connector 3 on High voltage potential can be performed. From one to earth potential arranged, not shown drive can then force on the shaft 1 to a to be driven element, for example, a contact arrangement of a High voltage switching device to be transmitted. By suitable attachment the connecting pieces 2, 3 at the end of the insulating tube 4, even in small Dimensions of the shaft 1 transmit a large torque and thus a high acceleration of the driven element can be achieved.

In the embodiment of the shaft of Figure 1, the attachment is achieved by two adhesive bonds 5 each formed from one in one end of the Insulating tube molded cone 6, from the lateral surface 7 on the inner surface 8 of the insulating tube 4 is guided and of a in the connector 2 and 3, respectively molded counter cone 9 and one of cone 6 and counter cone 9 formed and filled with adhesive gap 10. The adhesive bonds 5 extend extending from the inner surface 8 of the insulating 4 on the lateral surface. 7 As a result, force from the adhesive bond 5 directly into all in the pipe cross-section existing fibers of the fiber reinforcement initiated. It's shearing forces minimized between the individual fibers, which in transmission elements occur in the prior art, in which an adhesive bond only between lateral surface 7 and connector 2 and 3 is present. Because the force is initiated over all fiber layers of the pipe cross-section, the Power transmission element not only large torques, but also large Absorb tensile forces. It is therefore not only as a wave, but also as a wave Pull rod suitable. However, when used as a tie rod, it is recommended that To increase the tensile strength to arrange the fibers mainly in the pulling direction.

Is as shown in Figure 1, the fiber reinforcement of the insulating 4th formed by winding layers deposited fibers 11, the cone 6 should be the Fiber layers 11 at an angle of about 10 to 30 °, relative to the axis of Insulating tube, cut. It has been shown that when loading the Power transmission element 1 with torque the adhesive bond 5 then to transmitting force in virtually all fiber layers 11 simultaneously and uniformly initiates. This development of the shaft 1 can therefore be particularly large Transmit torques.

Ablängen eines Vorläuferkörpers des Isolierrohrs 4 aus einem durch Nasswickeln vorgefertigten Isolierrohr grosser Länge,

Einformen der Konusse 6 in den Vorläuferkörper durch Drehen und/oder Schleifen, Einformen der Gegenkonusse 9 in die beiden Anschlussstücke 2 und 3,

Vorbehandeln der Konusse 6 und der Gegenkonusse 9 mit einem geeigneten Klebstoff, etwa auf der Basis Epoxy,

Zusammenfügen von Isolierrohr 4 und Anschlussstücken 2, 3 unter Bildung der schmalen Klebstoffspalte 10, und

Aushärten des Klebstoffs unter Bildung der Welle 1.

The shaft 1 designed according to FIG. 1 can be manufactured as indicated below:

Cutting a precursor body of the insulating tube 4 from a prefabricated by wet winding insulating large length,

Molding the cones 6 into the precursor body by turning and / or grinding, molding the counter-cones 9 into the two connecting pieces 2 and 3,

Pretreating the cones 6 and the counter-cones 9 with a suitable adhesive, for example based on epoxy,

Assembling of insulating 4 and fittings 2, 3 to form the narrow adhesive gaps 10, and

Curing the adhesive to form the shaft 1.

Alternatively, the insulating 4 but also be made by pultrusion or by any other method which is used to make fiber-reinforced Polymer tubes is suitable.

In the manufacture of the shaft 1 is formed from the inner surface 8 of the insulating tube 4 and the fittings 2, 3 limited cavity 71. This cavity is practically gas-tight. To prevent sticking during the bonding process Manufacturing process or later due to elevated temperatures during operation of Wave 1 builds up unwanted pressure in the cavity, the cavity 71 opens in an outwardly directed pressure equalization channel 72. This channel connects the Cavity 71 with the outer space surrounding the shaft 1 and builds such a possibly resulting in the cavity overpressure. For the sake of one favorable electrical behavior of the wave, this channel is beneficial in Dielectric weakly loaded areas of the shaft is provided and is - as Fig.1 can be removed - with advantage radially through the wall of the insulating 4th guided and arranged in the middle between the two connecting pieces 2, 3 and / or axially guided by one of the connecting pieces 2, 3. Typically, the Pressure equalization channel as a bore with a diameter of a few mm Diameter, for example 2 to 4 mm, executed.

In the embodiment of the shaft according to Figure 2, the attachment is achieved by two embeds 12, which as einzubettendes part 13 each one in the direction the axis of the insulating 4 extended portion of the connector 2, 3rd and as an embedding body 14 has an end portion of the insulating 4. Die Embeddings 12 are formed in a casting process in which a prefabricated, the connecting pieces 2, 3 and a fiber body containing Precursor body of the shaft 1 is encapsulated with polymer.

Due to the embedding form fit and freedom of play between the embedded connector 2 or 3 and the insulating tube 4 and can be done so high tensile forces and torques independent of an adhesive bond be transmitted. Since this power transmission element produced by casting is, eliminating reworking of the insulating tube and gluing the Fittings. Precise control of the casting process is also possible a good quality of the insulating tube 4 and thus also the shaft or the To achieve force transmission element 1, in particular with regard to a favorable dielectric behavior and good mechanical properties.

3 shows that the embedded portion 13 of the connector 2 as Positive locking element is executed and in the circumferential direction about the axis of the Isolierrohrs 4 a deviating from a circle, profile 15, for example according to Art of a polygon. It is so positive connection between the insulating 4 and reaches the connector 2. Accordingly, form-fitting can also occur between the insulating tube 4 and the connector 3 can be achieved. Instead of a Polygons, the profile can also ellipse structure or other rotation-dependent Structure have. It is such a particularly good transmission behavior in Occurrence of large torques achieved, as for example by a Drive shaft for a contact system of a high current device is required. In the Profile may optionally also circumferentially extending wells or widening be formed. As a result, in addition form-fitting Tensile load reached.

From FIGS. 2 and 3 it can be seen that the connection piece 2 includes a guided in the direction of the axis of the insulating tube 4 longitudinal channel 16. A in the production of the insulating 4 in the casting process to support the Inner wall of the fiber body used, dargesteller in Figures 5 and 6 elastic molded body 22 made of an elastomeric material, such as silicone, can after the production of the shaft 1 are removed by this channel. The molded body 22 has an adapted to the profile 15 lateral surface and is hollow with advantage educated. He can then namely from the inside be pressurized and expand radially outwardly due to its elastic training.

From Fig.2 it can be seen that the fiber reinforcement of the insulating 4 by Winding layered deposited fibers 11 is formed. In Fig.2 symbolically are also indicated predominantly radially guided by the fiber layers 11 Reinforcing fibers 17. With a proportion of about 0.5 to 5%, preferably 1 to 3 %, these fibers cause a particularly high torsional strength of the insulating tube 4 and thus also the wave 1.

The power transmission element 1 according to Figures 2 and 3 can be manufactured with the device shown in FIG. 4. This device comprises a winding tool 20 with a rotatably mounted winding core 21. The winding core 21 is formed by the two connecting pieces 2, 3 and arranged between the two connecting pieces of elastic molded body 22 and serves to receive a fiber body 23. The fiber body 23 is by winding a biased Kunstfasergeleges 24, preferably based on aramid having a basis weight of a few hundred grams per m ² , for example, 300 g / m ² , emerged. The fiber body 23 therefore has the fiber layers 11 shown in FIG. In addition, the fiber body 23 may be reinforced by the radially guided fibers 17 shown in FIG. In the winding tool 20, a shaft 1 to be produced is now formed with respect to its geometrical dimensions largely corresponding precursor body 31. This precursor body comprises the sections 13 of the connecting pieces 2, 3 shown in FIG. 2 and to be embedded in the insulating tube 4.

The precursor body 31 is brought into a shrink-on tool 30. The Shrinking tool has a hollow cylindrical vacuum chamber 32, whose two end faces each have an opening 33 and and 34 for insertion of the precursor body 31. Inside the chamber 32 is a the Fiber body 23 is provided at a distance surrounding, elastic molded body 35, like the molded body 22 made of an elastomeric material, preferably silicone, consists. The molded body 35 is hollow-cylindrical and has like the Shaped body 22 in the circumferential direction polygonal profile. His two ends are each acting as a sealing body annular edges 36 and 37 formed. These edges are vacuum-proof supported on radially extending and the openings 33, 34 comprising sealing surfaces 38, 39. Before insertion of the precursor body 31 is placed on the vacuum chamber 32 negative pressure and so the molded body 35 is guided radially outward to form bias (Representation according to Figure 4). In the enlarged diameter of the molded body 35 now finds the precursor body during insertion into the Aufschrumpfwerkzeug enough space. By filling the vacuum chamber with air, the shaped body Moved 35 inside (direction arrows as shown in FIG. 4) and with a predetermined bias on the fiber body 23 of the precursor body 31st shrunk.

The precursor body 31 and its fibrous body 23 supporting elastic Moldings 22 and 35 are in a two-part vacuum and pressure resistant Mold 40 brought with a lower mold 41 and an upper mold 42. These Mold is shown in Figures 5 and 6 in section. After removing the Upper mold 42 is that of the moldings 22, 35 and two rings 43, 44th supported precursor bodies 31 are brought into the lower mold 42. The two rings 43, 44 are made of metal, preferably a resin-resistant steel, and support the two Edges 36, 37 of the molded body 35 largely vacuum and liquid-tight. After introduction of the precursor body 31 into the lower mold 41, the Top mold 42 applied and with the help of fasteners against the Unterform 41 pressed. Sealing rings 45 and 46 then seal the interior of the Mold 40 largely vacuum, pressure and liquid tight to the outside. Through openings 47 and 48 of the mold 40, the fittings 2, 3 after led outside. Another opening into the interior of the mold represents the longitudinal channel 16, by an open and connectable to a source of compressed gas end of the balloon-shaped molded body 22 is guided. Through an opening 49 can liquid polymer, such as epoxy resin, are guided inside the mold. A further opening 50 serves to vent the interior of the mold and is provided with a Vacuum system connectable.

For the production of the shaft or of the power transmission element is first the Form interior evacuated via the opening 50 and is pressurized gas through the longitudinal channel 16 embedded in the molding 22. By stretching itself here Shaped body 22, the longitudinal channel 16 is sealed to the outside. As shown in Fig.6 can be seen, then liquid polymer 51 is supplied via the opening 49. The resin flows through an unspecified, between support ring 43 and Connector 2 located annular gap in the fiber body 23 and soaks this Completely. By the pressurized, stretched and the channel 16 sealing molded body 22 prevents resin from passing through the longitudinal channel 16 can escape. The supply of polymer 51 is stopped as soon as the fiber body 23 is completely soaked. The openings 49 and 50 are closed. Of the pressurized elastic molded bodies 22 and by the lower and Upper mold 41, 42 supported moldings 35 now have a shaping effect on the polymer-impregnated fiber body 23 a. Optionally still in the liquid polymer Gas bubbles are at the same time on dielectrically ineffective sizes compressed. Under pressure then the polymer is elevated at Temperatures hardened. Here, the apparent from Fig. 2 insulating 4 with the two embedding 12 or executed as a wave 1 Power transmission element. After curing of the polymer, the shaped body 22 pressure-relieved and non-destructive due to its elastic deformability through the longitudinal channel 16 from the interior of the mold 40 and the shaft first be removed. The shaft 1, after removing the upper mold 42 of the Subform 41 are removed.

LIST OF REFERENCE NUMBERS

1

Power transmission element, shaft

2, 3

fittings

4

insulating

5

adhesive bond

6

cone

7

lateral surface

8th

palm

9

counter-cone

10

bonding gap

11

fiber layers

12

embedding

13

part to be embedded

14

end

15

profile

16

longitudinal channel

17

reinforcing fibers

20

winding tool

21

winding core

22

moldings

23

fiber body

24

Synthetic fiber scrims

30

shrink-fitting

31

precursor body

32

vacuum chamber

33, 34

openings

35,

moldings

36, 37

margins

38.39

sealing surfaces

40

mold

41

under the form

42

upper mold

43, 44

supporting rings

45, 46

seals

47,48,49,50

openings

71

cavity

72

Pressure compensation channel

Claims (19)

Element (1) for transmitting mechanical force in a rotating and / or pushing movement comprising two to different electrical potentials feasible fittings (2, 3) made of electrically conductive material and a load on torsion and / or train tube (4) made of an electrically insulating Material based on a fiber-reinforced polymer, in which force transmission element (1) the two connecting pieces (2, 3) are respectively fastened to one end of the insulating tube (4), characterized in that for fastening at least one of the two connecting pieces (2, 3) the following means are provided on the insulating tube (4): either an adhesive bond (5), which is formed by a in one end of the insulating tube (4) molded cone (6) which is guided by the lateral surface (7) on the inner surface (8) of the insulating tube (4) and of a in the at least one connecting piece (2, 3) formed counter-cone (9) and of a cone (6) and counter-cone (9) formed and filled with adhesive gap (10), or an embedding (12), which has as part to be embedded (13) in the direction of the axis of the insulating (4) extending portion of the at least one connector (2, 3) and as embedding (14) the end portion of the manufactured in a casting process insulating tube (4). Power transmission element according to claim 1, characterized in that when performing the fastening means as an adhesive bond (5), the fiber reinforcement of the insulating tube (4) by winding layer deposited fibers (11) is formed, and that the cone (6) the layers (11) under a Angle of about 10 to 30 °, relative to the axis of the insulating tube (4), cuts. Power transmission element according to one of claims 1 or 2, characterized in that in the execution of the fastening means as an adhesive bond (5) from the inner surface (8) of the insulating tube (4) and the connecting pieces (2, 3) limited cavity (71) with a the pressure transmission element (1) guided pressure equalization channel (72) is connected. Power transmission element according to claim 1, characterized in that in the embodiment of the fastening means as an embedding (12) of the embedded portion (13) of the at least one connecting piece (2, 3) is designed as a positive locking element. Power transmission element according to claim 4, characterized in that the positive-locking element has a profile deviating from a circle (15). Power transmission element according to one of Claims 4 or 5, characterized in that one of the connecting pieces (2, 3) has a longitudinal channel (16) guided in the direction of the axis of the insulating tube (4). Power transmission element according to one of claims 1 to 6, characterized in that the fiber reinforcement of the insulating tube (4) is formed by winding layers deposited fibers (11) and by predominantly radially through the fiber layers (11) guided reinforcing fibers (17). Power transmission element according to claim 7, characterized in that the proportion of predominantly radially guided reinforcing fibers (17) about 0.5 to 5%, preferably 1 to 3%, the fiber reinforcement. Method for producing the transmission element according to Claim 1, characterized by the following method steps: from the connecting pieces (2, 3) and a tubular fiber body (23), a precursor body (31) largely corresponding to the finished transmission element (1) is formed with respect to its geometric dimensions, the fiber body (23) and a portion of the precursor body (31) which comprises parts of the two connecting pieces (2, 3) enveloped by the fiber body (23) are brought into a casting mold (40), the fiber body is soaked in the mold (40) with liquid polymer (51), and the polymer-soaked fiber body (23) is hardened to form the insulating tube (4) fixing the connecting pieces (2, 3). A method according to claim 9, characterized in that prior to introduction into the mold (40), the inner surface and the lateral surface of the tubular fiber body (23) with elastic, gas and liquid-tight moldings (22, 35) are supported. A method according to claim 10, characterized in that the outer shell surface supporting elastic molded body (35) before being applied to the fiber body (23) is stretched in the radial direction. Method according to one of claims 10 or 11, characterized in that the shaped bodies (22, 35) are subjected to a pressure determining the shape of the insulating tube (4) during curing. Method according to one of claims 10 to 12, characterized in that the fiber body (23) is produced by winding a plurality of fiber layers (11), which fiber layers (11) are deposited on a winding core (21) of the connecting pieces (2, 3 ) and the inner surface of the fiber body (23) supporting elastic molded body (22) is formed. A method according to claim 13, characterized in that in the manufacture of the fiber body (23) by the fiber layers (11) additionally guided predominantly radially oriented reinforcing fibers (17). Method according to one of claims 10 to 14, characterized in that the the inner surface of the fiber body (23) supporting the elastic molded body (22) after curing by a hollow formed of the two connecting pieces (2) is removed. A method according to claim 15, characterized in that the inner surface of the fiber body (23) supporting elastic molded body (22) before impregnation of the fiber body (23) is pressurized gas. Apparatus for carrying out the method according to one of claims 9 to 16, characterized in that the casting mold (40) has at least five openings (16, 47, 48, 49, 50), of which a first and a second (47, 48) the passage of the two connecting pieces (2, 3), a third (49) of the supply of the liquid polymer (51), a fourth (50) of the venting of the mold (40) and a fifth (16) of the supply of pressurized gas, which compressed gas acts on the impregnated fibrous body (23) during the curing of the liquid polymer (51). Apparatus according to claim 17, characterized in that the device comprises a winding tool (20) having a winding core (21), which of the two connecting pieces (2, 3) and between the two connecting pieces (2, 3) arranged elastic molded body (22 ) is formed and the receptacle of the fiber body (23) is used. Apparatus according to claim 18, characterized in that the device comprises a shrink-fit tool (30) having a hollow cylindrical vacuum chamber (32) whose two end faces each have an opening (33, 34) for carrying the wound with the fiber body (23) winding core (21st ), as well as a radially extending sealing surface (38, 39) which is arranged in the interior of the chamber (32) and on which an annular edge (36, 37) of an elastic shaped body (35 ) is supported vacuum-tight.

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