JPH0438929B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a connecting rod according to the generic claims 1, 6 and 12, respectively.

As is well known for assembly reasons, the above-mentioned connecting rod with a split crankpin bearing, as described in German Patent Publication No. 3004575, has a core made of plastic, compared to one made entirely of metal. Embodiments having a metal casing have an inherently lower mass and therefore run much quieter and have improved efficiency, especially when used in high speed reciprocating machines. Efforts have been made to eliminate metal parts under these conditions. If the metal parts of the known connecting rods mentioned above are simply omitted in this way, the necessary strength to withstand compressive and tensile forces can no longer be guaranteed. The fiber strap-like body, which is only capable of being subjected to tensile loads, buckles when subjected to compressive forces. In addition, a composite material made of two materials with different moduli of elasticity that utilizes a metal jacket to maintain the outer shape of a fiber strap-like body has a high rigidity when a load is applied to the connecting rod. The result is that the fibers carry the load exclusively and the metal sheath does not perform a sufficient role in supporting the load.

SUMMARY OF THE INVENTION The object of the invention is to provide a connecting rod of the type mentioned at the beginning, in which almost all metal parts can be omitted without reducing the strength. This problem is common to claims 1, 6, and 12 mentioned at the beginning.

This problem is solved in the connecting rod of claim 1 by the configuration described in the characterizing part of claim 1. Accordingly, it is not sufficient for the invention to integrate the rod body and the fiber strap-like body, which have a similar fiber structure and which are inserted between the two bearings of the connecting rod and ensure their compressive absorption properties. Rather, sufficient strength for the composite of the ``fiber strap-like body and compressed rod body'' against the lateral force that acts due to mass acceleration can only be obtained by inserting the curved part of the bearing. . In this case, the bearing curved portion that frictionally connects the belt ends of the fiber strap-like body can be formed by bending the fiber strand multiple times at the open rod head portion to avoid forming it endlessly, or by dividing the bearing curved portion. (Under the condition of providing a flat flange surface of the open rod head in the above-mentioned German Patent Publication, it is necessary to provide a surrounding material with a corresponding external shape), as well as the hole of the flange hole. It is possible to effectively strengthen the rod head portion, which is open to the arcuate inner ring pressure, by reducing its size. In particular, this can be achieved with the arrangement characterized in claim 3.

Furthermore, in the laminated structure according to claim 2, a hanging strap is provided, corresponding to the connecting rod having an endless strap-like body around two closed bearings, which is known from German Patent Publication No. 2951112. The transverse tensile strength of the shaped belt is significantly increased by the shearing layer.

Further, the problem of the present invention is solved by the structure described in the characteristic part of claim 6. Accordingly, the invention does not only consist in integrating into the fiber strap a rod which, by being inserted between the two bearings of the connecting rod, ensures its compressive absorbency. Rather, sufficient strength for the composite of the "compressed fiber strap-shaped rod" against the lateral forces acting under mass acceleration can only be achieved by inserting a bearing bend. In this case, the bearing curved part that frictionally connects the belt ends of the textile strap-like body can be divided into two parts without restricting the belt ends by matching the shape of the joining position between the open rod head part and the bearing cover. (Or rather, the fiber strap-like body is not bent multiple times at the open rod head part to form an endless shape.)This point is that the ends of the material can be easily added when the connecting rod is installed. This has the advantage of ensuring bonding. In this connection, the layered structure according to claim 8 provides a dynamically high load-resistant adhesive connection between the open rod head part and the bearing cover, as claimed in claim 9. The maximum breaking strength is particularly advantageously obtained by carrying out the dovetail procedure described in section 2.

Furthermore, the object of the invention is achieved by the features described in the characterizing part of claim 12. In this case, the invention is not limited to the integration of a rod body and a textile strap-like body, which is inserted between the two bearings of the connecting rod and thus significantly increases the compression absorption. Rather, in this composite of the "fiber strap-like body and compression rod", the bearing cover is connected without a flange, that is, without the curved part of the strap-like body, even though the belt of the strap-like body is not divided. is possible. Conventionally, due to the curved portion of the strap-shaped body, a surrounding part for support was required in response to the requirement that the open rod head be made into a flat flange surface. Insofar as support means were required, it was necessary to use simple shapes for fiber-bonded composites.

Next, several embodiments of the present invention will be described in detail based on the drawings.

As a connection means between the linear motion part of the crank drive and the crankshaft, there is a connecting rod as shown in the figure.
The connecting rod consists of a rod shaft 1 having rod heads 2, 3 each equipped with a cylindrical bearing. These bearings, for example, bear the piston pin on the one hand and the crank pin on the other hand. For mounting on the crank pin, the rod head 3 can be split at a dividing joint surface 4 in a plane perpendicular to the longitudinal axis of the connecting rod, with the open half-shell rod part 3.1 and this shell-shaped rod head part 3.1. The half-shell bearing cover 3.2 corresponding to the part 3.1 is connected to the hole 5 of these flanges 3.3 and 3.4 (see Fig. 2).
This is carried out with a tension bolt 6 fitted inside.

In conventional constructions of this type of connecting rod, the main structural parts or shafts are removed in order to avoid reducing the strength of the structure, for example by removing the metal, from a fiber composite material with carbon fibers in a plastic matrix. The section is provided with an open strap 7 consisting of unidirectionally oriented fiber strands along a strap belt 7.1, with an open rod head section 3.1 forming a flange. In the case of splitting, the belt ends free with respect to the rod axis 1 point radially outward.

The transmission of forces in the open rod head section 3.1 between the free belt ends of the strap 7 is carried out by a bearing bend 8 extending from one belt end to the other belt end, the bearing bend 8 being an arcuate It consists of fiber strands that are unidirectional in the direction in which they extend. In this case, a compression rod 10 is buried in the space between the bearing cylinder 9 and the bearing curved portion 8 surrounded by the strap-like body, and the compression rod 10 is a unidirectional rod parallel to the longitudinal axis of the rod. It consists of oriented strands which support the necessary compressive forces of the connecting rod. An intermediate layer 11 consisting of fiber strands with a fiber orientation (fiber fabric or fabric) intersecting the bearing curved portion 8 transmits shear forces, and by this intermediate layer the holes in the flange holes 5 (FIG. 2) are The inner ring stress of the arch has sufficient strength.

For this purpose, an intermediate layer consisting of a cross-oriented fiber fabric or fiber layer may be embedded in the unidirectionally oriented fiber structure of the bearing bend 8. The intermediate layer 11 may also include another intermediate layer of unidirectionally oriented fiber material from belt end to belt end.
The crossed fiber orientations are particularly advantageously arranged alternately at ±45° and 0° and 90° (0° and 90° hereinafter referred to as 0°/90° in this specification) with respect to the longitudinal axis of the bearing curvature. extending in the direction. If necessary for strength reasons, in order to bury the metal bearing shell halves 12.1 in the same plane,
The bearing curvature 8 in the area of the screw 6 is provided with a textile fabric or a fiber layer, in particular with ±45° and 0°/with respect to the longitudinal axis of the bearing.
Filler 1 consisting of alternating layers oriented at 90°
Place 3. At the closed rod end, a bearing shell 14 is arranged in a bearing cylinder 9 in which the strap 7 and the compression rod 10 are integrated, the bearing cylinder 9 being oriented relative to the longitudinal axis of the bearing. Consists of fiber material with a 0°/90° orientation.

In order to increase the shear strength of this fibrous structure, a cover layer 15 is provided on both rod end sides and, parallel to this, a bearing bend 8, a compressed rod 10 and an intermediate layer 1.
1 and an intermediate layer 16 dividing the strap-like body 7 with filler 13 in the longitudinal direction of the bearing, these being made of a fibrous material oriented at ±45° to the longitudinal axis of the rod. For these cross-oriented fiber materials, suitable fabrics or fabrics may be used.

As for the bearing cover 3.2, its textile structure corresponds to that of the open rod head part of the connecting rod, i.e. in this example (for embedding the second bearing shell half 12.2) of the screw 6. An identical bearing flexure 17 with a filler 18 provided in the area is integrated via an intermediate layer 19 of the type described above with a further identically shaped bearing flexure 20, which is connected to the connecting rod. It corresponds to the strap-like body 7 of the main part. The cover layer 15.1 also transmits shear forces.
and an intermediate layer 16.1 are also provided in this example.

Furthermore, the seat plates 21 and 22, which are attached by the heads or nuts of the screws 6 and have suitable edges, significantly prevent the application of sharp compressive forces to the corresponding mounting surface. These seats may be made of metal as usual or may be glued to improve the transmission of forces to the flanges 3.3-3.4.

As shown in Figure 2, the above-mentioned connecting rod structure is a bonded composite of multiple fibrous structural parts, each of which is cut from a preformed continuous body and partially pressed. It may also be a punched one. The connecting rod can therefore be manufactured according to the assembly principle and is therefore particularly suitable for mass production.

3, 4, and 5 show, for example, the illustrated connecting rod as a connecting member between the linear motion part of the crank drive and the crankshaft, and the connecting rod consists of a rod shaft 101; As cylindrical bearings, there are rod heads 102, 103 which are provided with a bearing for the piston pin on the one hand and a bearing for the crank pin on the other hand. For attachment to the crank pin, the attached rod head is first divided into an open half-shell rod head part 103.1 and a corresponding half-shell bearing cover 103.2.

The structure of such a connecting rod includes the use of a fiber composite material with carbon fibers in a plastic matrix instead of metal, and a rod head section 103.1 with an open bearing cover 103.2 without reducing strength. A main or shank portion is provided with an open strap 104 of unidirectionally oriented fiber strands along the strap belt 104.1 and an open rod head portion 103. .1, the free belt end is oriented parallel to the rod axis 101 in order to connect the cover.

The force coupling in the open rod head portion 103.1 between the free belt ends of the strap 104 is obtained by a bearing bend 105 extending from one belt end to the other belt end. This bearing bend 105 consists of fiber strands with a unidirectional orientation in its longitudinal direction. In this case, 10 in Figure 2
As shown in , a compression rod 107 is buried in the space between the bearing cylinder 106 and the bearing curved portion 105 surrounded by the strap-like body. The compression rod 107 is comprised of fiber strands with a unidirectional orientation parallel to the rod longitudinal axis and takes on the compression loads applied to the connecting rod. Bearing cylinder 1
06 can be formed, for example, as a winding (formed by a filament winding method) and is particularly advantageously made of a fiber material with a crossed orientation of the fibers, such as at 0°/90° to the longitudinal axis of the bearing. . If necessary, a metal bearing shell 10
6.1 may be provided. The bearing cover 103.2, which is formed in the form of a bearing bend corresponding to the open rod head part 103.1, consists of fiber strands with a unidirectional orientation relative to the direction of extension of the cover.

In order to increase the shear strength and stiffness of the entire fiber structure of this connecting rod, as shown in FIG.
In addition to the cover layer 108 on the end face side, a strap-shaped body 104 having a bearing curved part 105 and a compression rod 107 and an intermediate layer 109 dividing the bearing cover 103.2 in the longitudinal direction of the bearing are provided parallel to the cover layer 108. The intermediate layers 109 each particularly preferably consist of a fiber material with a fiber orientation of ±45°. Furthermore, suitable fabrics or fabrics can be used for the overall cross-oriented fiber material.

When assembling the connecting rod, simply glue the open rod head part 103.1 and the bearing cover 1.
03.2 is obtained by dovetailing the ends of the head part and the cover end facing in opposite directions. For this purpose, the open rod head portion 103.1 and the unidirectional fiber layers 110 to 111 of the bearing cover 103.2, which are embedded between the cover layer 108 and the intermediate layer 109 according to FIG. The next superimposed joint is the unidirectional fiber layers 110, 111 and the facing cover layer 1.
08 or the intermediate layer 109, respectively.

As a result, between the unidirectional fiber layer 110 of the strap-shaped body 104 or the bearing curved portion 105 and the unidirectional fiber layer 111 of the bearing cover 103.2,
The largest possible bonding or bonding surface is obtained. If the load conditions of the adhesive bond are low, the cover layer and the intermediate layer as well as the fiber layer embedded between them will allow the strap-shaped body and the bearing curved part on the one hand and the unidirectional fiber layer of the bearing cover on the other hand. , the unidirectional fiber layer and the cover layer or intermediate layer are butted against each other at an obtuse angle so as to overlap each other.

For a particularly advantageous adhesive connection between the open rod head part 103.1 and the bearing cover 103.2, according to FIG. 112 has an open rod head part 103.1 and a bearing cover 103.2 at its dividing seam 112.1.
It is emphasized that it is only necessary to provide the bearing surface with a rotational displacement relative to the dividing plane between the bearing surface and the bearing surface.This prevents the adhesive from penetrating into the bearing surface during assembly. In this case, it is of course possible to prevent the bearing shell 112 from rotating using a pin or the like by combining a prevention means of a common structure.

6 to 9 show a connecting rod as a connection between the linearly moving part of the crank drive and the crankshaft, which connecting rod has rod heads 202, 203 formed as cylindrical bearings. It consists of a rod shaft 201 having a rod head 20.
2,203 bears the piston pin on the one hand and the crank pin on the other hand. The attached rod head 203 for attachment to the crank pin is divided into an open half-shell rod head part 203.1 and a corresponding half-shell bearing cover 203.2.

In particular, when the connecting rod is divided into parts like this for the main part of the connecting rod or the shaft part,
In order to create a fiber composite structure with carbon fibers in a plastic matrix without metal and without reducing strength, it is necessary to use endless fibers consisting of unidirectional fiber strands as the basic body of the connecting rod. The strap-shaped body 204 is selected and shaped into a loop-shaped body which is bent over its length around the bolt 205, and this loop-shaped body surrounds the bearing cylinder 206, which is closed on the other side, on both sides. This selected shape of the loop body is particularly shown in FIG.

The open rod head part 203.1 is formed by correspondingly widening the two bolt-side strap ends 204.1 by a saddle-shaped bearing bend 207, which extends along its extension. It is formed from fiber strands with a cross-oriented orientation, especially at an angle of ±45°. In addition, the bearing curved portion 207 is connected with the same material at the end of the strap on the bolt side in order to obtain the necessary shear strength and rigidity, and is similarly integrated with the outer end surface of the strap end 204.1. cover layer 20 from fiber strands oriented at ±45°
8 is formed.

In this case, the strap-like body end 204.1 on the bolt side
A filler 209 (FIG. 7) is inserted between both strands of the bearing curved portion 207 and the cover layer 20 to maintain the spacing.
Like No. 8, it is penetrated by a bolt 205. Further, the space between the closed bearing cylinder 206 and the bearing bend 207 is filled with a compressed rod 210, which is composed of a unidirectional fiber strand oriented at least in the extending direction of the rod. and thus maintains the compressive strength and stiffness of the connecting rod. At the connection of the end 204.2 of the strap and the compression rod 210, the bearing cylinder 206 consists of a winding, ie a fiber strand oriented at 0°/90° to the longitudinal axis of the bearing. If required, a metal bearing shell 206.1 may be provided.

In order to increase the shear strength of the overall fiber structure of the connecting rod, according to FIG. 7 a cover layer 211 is provided on the end side of the strap, which consists of fiber strands oriented at ±45°. The cover layer 211 is the compressed rod body 2
10 is divided in the longitudinal direction of the bearing. The generally cross-oriented fiber material may be any suitable fabric or fabric.

The bearing cover 203.2 is removably connected to the bearing curved part 207 via bolts 205, and because the bearing covers are arranged so that they overlap on the bearing surface of the bearing curved part, the abutting edge of the bearing cover 203.2 The inner lining 207.1 has a thickness corresponding to the thickness of the inner lining 207.1. In this type of cover connection using cross-beam-shaped bolts 205, the bearing cover 20
There are no restrictions on the selection of materials for 3.2. In the case of a plastic or light metal construction, a (possibly glued) segmented metal bearing shell 212 is additionally provided.

As shown in FIG. 9, the tapered sleeve 213 allows the bearing curvature 207 or its inner lining 2 to be tightened by simply tightening the nut 205.1.
07.1, the bearing cover 203.2 can be positioned as desired to obtain a play-free (possibly pretensioned) seating on the crank pin (not shown). For this purpose, the individual sleeves may also be provided with threaded portions. Also, tighten the bolts by 2
It may be divided, and both halves may be bolts that are screwed into threaded holes in the bearing cover. The edges of the holes can be fitted together with the tapered sleeve 213 and the cover layer 208 without any hindrance to the above positioning process.
This is achieved by providing an elastic disk 214 between the two.

[Brief explanation of drawings]

FIG. 1 is a plan view of a connecting rod made of a fiber composite material according to the present invention, FIG. 2 is an exploded view of the connecting rod of FIG. 1, and FIG. 3 is a plan view of a second embodiment. 4 is a side view thereof, FIG. 5 is a schematic representation of the rod head, FIG. 6 is a plan view of a third embodiment of the connecting rod made of fiber composite material, and FIG. 7 is a side view thereof. 8 is a perspective view of its basic members, and FIG. 9 is a sectional view of its rod head. Reference numbers in the figure: 1... Rod shaft, 3.1... Rod head part, 3.2...
Bearing cover, 5... Flange hole, 7... Strap-shaped body, 8... Bearing curved portion, 9... Bearing cylinder, 10
... Compressed rod, 11 ... Intermediate layer, 13 ... Filler, 15 ... Cover layer, 16 ... Intermediate layer, 101
... Rod shaft, 103.1...
... Rod head portion, 103.2 ... Bearing cover, 104 ... Strap-like body, 105 ... Bearing curved part, 106 ... Bearing cylinder, 107 ... Compression rod,
108...Cover layer, 109...Middle layer, 11
0,111...Fiber layer of bearing cover 103.2,
112...Bearing shell, 112.1...Dividing surface,
203.2... Bearing cover, 204... Hanging strap-like body, 204.1... Hanging strap-like body end, 205...
Bolt, 206... Bearing cylinder, 207... Bearing curved part, 207.1... Lining, 209... Filler, 210... Compression rod, 211... Cover layer.

Claims (1)

[Scope of Claims] 1. A connecting rod (compression rod) made of fiber-reinforced plastic, in which one rod head for a piston pin is formed as a closed cylindrical bearing, and the other rod head for a crank pin is divided. The bearing is designed as a cylindrical bearing, which consists of an open half-shell rod head part and a corresponding half-shell bearing cover, with the unidirectional fiber strands forming a closed bearing. The fibers are assembled into a strap extending in the longitudinal direction of the rod, surrounding the cylinder, and both belts of the strap are formed into flanges with holes at the open rod head. In the connecting rod made of reinforced plastic, the strap-shaped body 7 is divided by the open rod head part 3.1,
Furthermore, the strap-like body has a free belt end facing radially outward to form a flange on the rod shaft 1;
integrated with a bearing bend 8 extending from one belt end to the other, the bearing bend consisting of fiber strands oriented parallel and/or cross to the direction in which it extends; A compressed rod 10 is embedded so as to fill the space between the closed bearing cylinder 9 and the bearing bend 8, which compressed rod 10 consists of fiber strands oriented at least parallel to the longitudinal axis of the rod. A connecting rod characterized by: 2 The cover layer 15 on the rod end side and parallel to this the strap-like body 7 from the bearing curved part 8 to the compressed rod body 10.
The joint according to claim 1, characterized in that the cover layer 15 and the intermediate layer 16 each consist of cross-oriented fiber strands. rod. 3 The bearing curved part 8, which is made up of unidirectionally oriented fiber strands extending in the longitudinal direction of the bearing curved part, is connected to the strap-like body 7 via the intermediate layer 11 which is made of fiber strands with a crosswise orientation. A connecting rod according to claim 1 or 2, characterized in that the connecting rod is connected to an end of the belt and a compression rod (10). 4. In the area of the bore 5 of the flange, adjoining the bearing curvature 8 on the side of the bearing cover 3.2, a filler 13 consisting of cross-oriented fiber strands is provided in each case. A connecting rod according to range 1 or 3. 5 A closed bearing cylinder 9 is connected to the strap-shaped body 7 and the compression rod 10 and is composed of cross-oriented fiber strands, the orientation of the fiber strands being in particular at 0° and 90° with respect to the longitudinal direction of the bearing cylinder. The connecting rod according to claim 1, characterized in that the connecting rod is oriented in the direction of . 6. A connecting rod made of fiber-reinforced plastic, in which one rod head for the piston pin is formed as a closed cylindrical bearing, and the other rod head for the crank pin is formed as a divided cylindrical bearing. The bearing consists of an open half-shell rod head part and a corresponding half-shell bearing cover, the unidirectional fiber strands surrounding the closed bearing cylinder. An open rod head section 103.1 of a connecting rod made of fiber-reinforced plastic, which is assembled into a longitudinally extending strap, with bearing covers connected to both belts of the strap. Suspended leather-like body 104
is divided, and the strap-like body is further integrated with a bearing curved portion 105 extending from one belt end to the other belt end with a free belt end oriented parallel to the rod shaft 101 for connection to the bearing cover. Ori,
The bearing bend consists of fiber strands with a unidirectional orientation relative to the direction in which it extends, with the closed bearing cylinder 106 and the bearing bend 105
A compressed rod 107 is buried to fill the space between the rod and the rod, and the compressed rod is made of fiber strands oriented at least parallel to the longitudinal axis of the rod.
are mutually opposite ends thereof, together with a bearing cover 103.2 formed as a corresponding bearing curvature, and are joined to each other by: 7. The connecting rod according to claim 6, wherein the connecting rod is bonded with an adhesive to ensure dovetail connection. 8 End face side cover layer 108 and bearing curved part 10
5 and a compression rod 107.
and an intermediate layer 109 parallel to the cover layer 108 that divides the bearing cover 103.2 in the longitudinal direction of the bearing, the cover layer 108 and the intermediate layer 109 consisting of fiber strands with a cross orientation. Connecting rods according to range 6. 9. Embedded between cover layer 108 and intermediate layer 109, while open rod head portion 103.1
On the other hand, the unidirectionally oriented fiber layers 110 to 111 of the bearing cover 103.2 have a superimposed joint between the unidirectionally oriented fiber layer and the opposing cover layer 108 or intermediate layer 109. Claim 6, characterized in that a dovetail is provided so that a butt joint is created between the two.
The connecting rod according to one of paragraphs 8 to 8. 10. Claim 6, characterized in that the closed bearing cylinder 106 is composed of fiber strands in a cross-oriented orientation, the crossed orientation being in particular in the direction of 0° and 90° with respect to the longitudinal axis of the bearing cylinder. Connecting rod as described in . 11. The open rod head part 103.1 and the bearing cover 103.2 are provided with a bearing shell 112 in the form of a divided bush, which shell 112, at its dividing surface 112.1, is provided with an open rod head part 1.
The connecting rod according to claim 6 or 7, characterized in that the connecting rod is provided rotationally displaced with respect to the dividing plane between the bearing cover 103.1 and the bearing cover 103.2. 12. A connecting rod made of fiber-reinforced plastic, in which one rod head for the piston pin is formed as a closed cylindrical bearing, and the other rod head for the crank pin is formed as a divided cylindrical bearing. The bearing consists of an open half-shell rod head part and a corresponding half-shell bearing cover, the unidirectional fiber strands surrounding the closed bearing cylinder. In a connecting rod made of fiber-reinforced plastic, the straps are assembled into a strap-like body extending in the longitudinal direction, and a bearing cover is connected to the belt of the strap-like body.
04 is connected via the bolt 205 at the strap ends 204.1 on both bolt sides in the form of an endless loop bent around the bolt 205. and bearing curved part 2
07 are expanded by a bearing curved part 207 in order to overlap and join them, and the loop-like body surrounds the closed bearing cylinder 206 on both sides on the other side, and the closed bearing cylinder 206 and the bearing curved part 207
A connecting rod characterized in that the space between the two is filled with a compression rod body 210. 13. Claim 12, characterized in that a spacing filler 209 is inserted between both strands of the strap-shaped body end 204.1 of the loop-shaped body on the side of the individual bolt. Connecting rod as described in . 14. The ends 204.1 of the strap-like bodies on the bolt side are each integrated with a cover layer 208 consisting of cross-oriented fiber strands on the outer end side, or Connecting rod according to paragraph 13. 15. The loop-shaped body is integrated with a cover layer 211 made of cross-oriented fiber strands that divides the compression rod 210 in the longitudinal direction of the bearing, on the end face side of the strap-shaped body constituting the loop-shaped body. A connecting rod according to claim 12, characterized in that: 16. Claim 12, characterized in that the closed bearing cylinder 206 is composed of cross-oriented fiber strands, in particular oriented at 0° and 90° with respect to the longitudinal axis of the bearing cylinder. Connecting rod as described. 17. Articulation according to claim 12, characterized in that the bearing curved part 207 is composed of fiber strands oriented crosswise to its longitudinal direction, in particular oriented at ±45°. rod. 18. Claim 12, characterized in that the bearing curved portion 207 is provided with a lining 207.1 on the bearing surface, the thickness of which corresponds to the thickness of the abutting edge of the bearing cover 203.2. The connecting rod according to paragraph 1 or paragraph 17. 19. Claim 12 or 15 or 16, characterized in that the compressed rod 210 or its individual layers are composed of fiber strands with an orientation at least in the longitudinal direction of the rod. connecting rod.