Clamping bracket and exhaust system of an internal combustion engine
The clamping clamp with a curved groove base and material recesses ensures easy assembly and secure connection of exhaust pipe sections by managing thermal expansion, maintaining consistent clamping force.
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-02-17
- Publication Date
- 2026-04-02
AI Technical Summary
Existing clamping clamps for connecting circular cross-section assemblies, such as exhaust pipe sections in internal combustion engines, are difficult to install and can experience unintended changes in clamping tension due to thermal expansion.
The clamping clamp design features grooves with a curved base contour, allowing easy assembly and disassembly by deforming into a circular shape upon tightening, with recesses and material adjustments to manage stress and thermal expansion.
Facilitates easy installation and secure connection of exhaust pipe sections with minimal strain on clamping screws, maintaining consistent clamping force despite thermal expansion.
Smart Images
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Abstract
Description
[0001] The invention relates to a clamping clamp. Furthermore, the invention relates to an exhaust system of an internal combustion engine.
[0002] Numerous applications exist where two adjacent assemblies with a circular cross-section are connected using a clamp. For example, in the exhaust system of an internal combustion engine, exhaust system components are connected using clamps; these components can be exhaust pipe sections, which may be conventional exhaust pipes or bellows-like compensators.
[0003] Clamping clamps with a first clamping clamp half and a second clamping clamp half are known in practice, wherein the clamping clamp halves are essentially semicircularly contoured and are connected at their adjacent end sections by clamping screws. It is also known to provide a groove in an inner surface of the clamping clamp halves, into which circularly contoured flanges of the assemblies to be connected via the clamping clamp engage. Each groove has a groove base and clamping surfaces angled relative to the groove base at a defined angle, wherein the groove base of each groove is arranged radially outside with respect to the assemblies to be connected, and the groove is radially open inside so that the flanges can engage in the respective groove. Clamping clamps known in practice are difficult to install.Furthermore, the problem can arise that, due to operational thermal expansion of the clamp and operational thermal expansion of the assemblies to be connected via the clamp, the tension provided by the clamp between the assemblies to be connected may be unintentionally reduced or increased.
[0004] Based on this, the invention aims to create a novel clamping clamp and exhaust system for an internal combustion engine. This objective is achieved by a clamping clamp according to claim 1.
[0005] The groove base of each groove runs along a curved contour such that, with unconnected clamp halves or untightened clamping screws, the distance of the groove base from the center point of the curved contour of the groove base is greater at the end sections of each clamp half than in the central section of the clamp half. Therefore, when flanges of interconnected assemblies or exhaust pipe sections engage in the groove of the clamp, the distance of the groove base from an outer surface of the flange facing the groove base is greater at the end sections of each clamp half than in the central section of the clamp half, with unconnected clamp halves or untightened clamping screws.
[0006] This design of the clamp according to the invention is advantageous for enabling easy assembly of the clamp onto the assemblies or exhaust pipe sections to be joined. The clamp halves can thus be precisely positioned on the flanges of the assemblies or exhaust pipe sections to be joined, with the distance between the base of the respective groove of each clamp half and the flanges being greater in the end sections than in the middle section of the respective clamp half when simply placed on the clamp. When the clamping screws are tightened, the clamp halves of the clamp according to the invention are deformed in a defined manner. This makes a clamp half according to the invention easy to assemble and disassemble on assemblies or exhaust pipe sections to be joined.
[0007] The base of each groove preferably follows an oval contour or an oval-segment-like, elliptical, or partially elliptical contour, such that at the end sections of each clamp half, the distance of the groove base from the center point of the oval, oval-segment-like, elliptical, or partially elliptical contour is greater than in a central section of the respective clamp half. The groove formed in each clamp half particularly follows an elliptical segment. At the end sections of each clamp half, the distance of the groove base from the center point of the respective elliptical segment is then greater than in a central section of the respective clamp half. This is particularly preferred to facilitate easy assembly of the clamp onto the assemblies or exhaust pipe sections to be joined.
[0008] Then, if a dividing plane of the clamp halves is horizontally aligned and the groove introduced into the respective clamp half runs along an elliptical segment, the longer elliptical axis is aligned parallel to the horizontal dividing plane.
[0009] Preferably, the shape of the respective curved contour, in particular the oval or oval-segment-like, elliptical, or partially elliptical contour, is selected such that, after the clamping clamp halves are screwed together using the clamping screws to connect the assemblies or exhaust pipe sections to be joined via the clamping clamp, the respective curved contour is deformed into a circular segment. This is preferred to facilitate easy assembly and disassembly of the clamping clamp and, in the assembled state, to enable optimal clamping of the assemblies or exhaust pipe sections to be joined over the entire circumferential extent of their flanges.
[0010] Then, if the clamping clamp halves are not connected or the clamping screws are not tightened, the respective clamping clamp half with the respective groove base and the respective clamping surfaces and thus the respective clamping profile is oval or oval-segment-like or elliptical or partially elliptical widened compared to the circular segment contour, so that easy assembly of the clamping clamp halves on the assemblies or exhaust pipe sections to be connected and easy disassembly of the clamping clamp halves from the assemblies or exhaust pipe sections is possible.
[0011] In a further development of the clamping clamp, each clamping screw extends through recesses or bores in adjacent end sections of the clamping clamp halves. These recesses or bores are angled such that, after the clamping clamp halves are bolted together, the longitudinal axes of the recesses or bores through which each clamping screw extends are coaxial, perpendicular to the dividing plane of the clamping clamp halves. This ensures that, despite the deformation of the clamping clamp halves during assembly and operation, the clamping screws are subjected to no or only negligible bending stress and thus are not subject to increased strain.
[0012] In an advantageous further development of the clamp according to the invention, at least one material recess is provided in each of the clamp halves, via which the stiffness of the respective clamp halves is adjusted. This makes it easier to transform the clamp halves from their curved contour, in particular from their oval or oval-segment-like contour, especially from their elliptical segment shape, into a circular segment shape during assembly of the clamp.
[0013] The exhaust system according to the invention is defined in claim 9.
[0014] In particular, the outer surface of each flange facing the respective groove base follows a curved contour such that, with unconnected clamp halves or untightened clamping screws, the distance between the groove base and the outer surface of the flange facing the groove base is greater at the end sections of each clamp half than in a central section of the clamp half. This contouring of the outer surface of the flange facing the groove base can alternatively also be used with a conventional clamp.
[0015] Preferably, the exhaust pipe sections, at least in the area of their flanges to be connected via the clamping clamp, and each clamp are made of an identical or similar metallic material, in particular a ferritic or austenitic material. This design has the advantage that the assemblies or exhaust pipe sections to be connected, as well as the clamping clamp, are subject to very similar thermal expansion in the area of their flanges. There is no risk that the clamping force applied to the assemblies or exhaust pipe sections to be connected will be subject to an unacceptably high degree of change. Even in the event of thermal expansion, a secure connection can be ensured.
[0016] Preferred embodiments of the invention are described in the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being limited thereto. The drawing shows: Fig. 1. A first clamping clamp in perspective view; Fig. 2 a second clamping clamp in perspective view; Fig. 3 a side view of the clamping clamp of the Fig. 2 with partial cross-section; Fig. 4 a detail of the clamp; Fig. 5 a partial cross-section through a clamping clamp and two assemblies or exhaust pipe sections connected via the clamping clamp; Fig. 6 a perspective view of an arrangement of two clamps and a component designed as a compensator, which is to be connected to adjacent exhaust pipes via the clamp; Fig. 7 a third clamp in perspective view; Fig. 8 a highly schematic representation of a flange together with one clamping clamp half of a clamping clamp according to the invention; Fig. 9 a highly schematic representation of a flange together with one clamping clamp half of a clamping clamp of an exhaust system according to the invention.
[0017] The invention relates to a clamping clamp for connecting assemblies and an exhaust system of an internal combustion engine, in which exhaust pipe sections are to be connected as assemblies via clamping clamps.
[0018] In particular, the assemblies or exhaust pipe sections to be joined have a circular cross-section and flanges with a circular cross-section. This is preferred. As explained further below, the flanges can also have a curved contour.
[0019] Fig. Figure 1 shows a first clamping clamp 10, which consists of a first clamping clamp half 11 and a second clamping clamp half 12. The two clamping clamp halves 11, 12 are connected to each other by clamping screws 13, which interact with a clamping nut 14, in the area of adjacent end sections 11a, 12a and 11b, 12b of the clamping clamp halves 11, 12.
[0020] In the exemplary embodiment of the Fig. 1 extends through each of the adjacent end sections 11a, 12a and 11b, 12b of the clamping clamp halves 11, 12 a single clamping screw 13, which interacts with a clamping nut 14.
[0021] In contrast, it shows Fig. 2 a clamping clamp 10 in which two clamping screws 13 extend through the respective adjacent end sections 11a, 12a and 11b, 12b, each clamping screw 13 in turn interacting with a clamping nut 14.
[0022] In the exemplary embodiment of the Fig. 1. The two clamping clamp halves 11, 12 are therefore connected by two clamping screws 13 and in the exemplary embodiment of the Fig. 2. The two clamp halves 11, 12 are connected to each other by four clamping screws 13. In Fig. 1 are the clamping screws 13 in radial extension and in Fig. 2 arranged in axial extension of the clamp halves 11, 12. In areas with limited space, the design variant of Fig. 2 is preferred because the entire clamping clamp 10 has a smaller outer diameter due to the arrangement of the clamping screws 13 in axial extension of the clamping clamp halves 11, 12.
[0023] Fig. Figure 7 shows another clamping clamp 10 with two clamping clamp halves 11, 12 which are connected to each other via clamping screws 13. In Fig. 7 the clamping screws 13 extend through transverse bolts 32, which are received in recesses 33 of the clamping clamp halves 11, 12 and in turn interact with clamping nuts 14.
[0024] Each of the clamping clamp halves 11, 12 of a clamping clamp 10 has an inner surface 15 or 16 into which a groove 17 or 18 extending in the circumferential direction of the clamping clamp halves 11, 12 or the respective inner surface 15, 16 is provided.
[0025] Each of these grooves 17, 18 has a groove base 19 and clamping surfaces 20, 21 angled at a defined angle to the groove base 19. In the assembled state, a clamping force is exerted on flanges 22, 23 of assemblies or exhaust pipe sections 24, 25, which are to be connected to one another via the clamping clamp 10, via these clamping surfaces 20, 21. The groove base 19 and the clamping surfaces 20, 21 of the respective groove 17 or 18 define a radially inwardly open V-profile of the respective groove 17 or 18, which is also referred to as a clamping profile.
[0026] Fig. Figure 5 shows a partial cross-section through assemblies 24, 25 of an exhaust system of an internal combustion engine connected to each other via a clamping clamp 10. The assemblies 24, 25 to be connected are exhaust pipe sections, namely exhaust pipe section 24 is a conventional exhaust pipe and exhaust pipe section 25 is a bellows-like compensator. The flanges 22, 23 of the assemblies or exhaust pipe sections 24, 25 connected via the clamping clamp 10 engage in the groove 17 or 18 of the respective clamping clamp half 11, 12 of the clamping clamp 10. The clamping surfaces 20, 21 come into contact with the contours of the flanges 22, 23 and press or clamp the assemblies or exhaust pipe sections 24, 25 to be joined together in the area of their flanges 22, 23. A radially outer, circumferential outer surface 34 of the respective flange 22, 23 faces the groove base 19 of the respective groove 17, 18.
[0027] In a clamping clamp 10 according to the invention, the groove base 19 of the circumferentially extending groove 17, 18 of the respective clamping clamp half 11, 12 runs along a curved contour, in particular along an oval contour or oval segment-like contour or elliptical contour or partially elliptical contour.
[0028] This oval contour, or oval-segment-like contour, or elliptical contour, or partially elliptical contour, is configured such that, with unconnected clamp halves 11, 12 or with untightened clamping screws 13, the distance of the groove base 19 of the respective groove 17, 18 from a center point of the curved contour is greater at the end sections 11a, 12a, 11b, 12a, 12b or adjacent to these end sections 11a, 11b, 12a, 12b of the respective clamp half 11, 12 than in a central section 11c, 12c of the respective clamp half. An oval or oval-segment-like contour is preferably an elliptical segment. Other oval contours are also conceivable.
[0029] Thus, when the flanges 22, 23 of the assemblies 45, 25 to be connected engage in the groove 17, 18 of the respective clamping clamp half 11, 12, the distance of the groove base 19 of the respective groove 17, 18 from the outer surface 34 of the respective flange 22, 23 facing the respective groove base 19 is greater at the end sections 11a, 11b, 12a, 12b of the respective clamping clamp half 11, 12 than in the middle section 11c, 12c of the respective clamping clamp half 11, 12, when the clamping clamp halves 11, 12 are not connected or when the clamping screws 13 are not tightened.
[0030] Furthermore, this oval or oval-segment-like or elliptical or partially elliptical contour is preferably arranged such that after screwing the clamp halves 11a, 11b 12a, 12b together via the clamping screws 13, 14 to connect the assemblies or exhaust pipe sections 14, 15 to be connected via the clamp 11, 12, the respective curved contour is deformed into a circular segment.
[0031] In the exemplary embodiment of the Fig. 3 The inner surfaces 15, 16 of the clamping halves 11, 12 are curved contoured as described above, in particular oval or oval segment contoured.
[0032] Then, if the inner surfaces 15, 16 of the clamp halves 11, 12 are contoured as described above, the depth of the respective groove 17, 18, which is shown in the side view of the Fig. Since the depth of the groove 17, 18 is not visible, the groove's circumference must be constant, as the inner surfaces 15, 16 of the clamp halves 11, 12 are already curved, in particular oval or oval-segment shaped, as described above. With a constant depth of the respective groove 17, 18, the groove base 19 of the respective groove 17, 18 then follows a shape, in particular, along an oval or oval segment.
[0033] In Fig. Figure 3 shows a center point M of an oval or oval-segment-shaped contour of the two clamp halves 11, 12. In the region of the end sections 11a, 11b, 12a, 12b, with the clamping screws 13 not tightened, the distance of the oval or oval-segment-shaped, in particular elliptical-segment-shaped, inner surfaces 15, 16 of the clamp halves 11, 12 from the center point M is dimension a, whereas in the region of the middle sections 11c, 12c of the clamp halves 11, 12, the distance of the inner surfaces 15, 16 from the center point M is dimension b, where a is greater than b. Fig. Figure 8 shows, in a highly schematic form, the clamping clamp half 11 according to Fig. 3 together with a circular contour of the outer surface 34 of the diameter d of the flanges 22, 23 of the assemblies 24, 25 to be joined together.
[0034] In Fig. 3 is a horizontally oriented parting plane of the clamp halves 11, 12. The groove 17, 18 formed in the respective clamp half 11, 12 runs along a curved contour, preferably along an elliptical segment, when the clamp halves 11, 12 are not connected or when the clamping screws 13 are not tightened. The longer ellipse axis or longer semi-axis a is aligned parallel to or lies in the same horizontal parting plane, and the shorter ellipse axis or shorter semi-axis b is aligned perpendicular to the horizontal parting plane.
[0035] It is also possible that the inner surfaces 15, 16 of the clamp halves 11, 12 are contoured in a circular segment shape and that the depth of the respective groove 17, 18 varies over the circumference of the respective clamp half 11, 12, with the groove depth then being greater in the area of the end sections 11a, 11b, 12a, 12b of the respective clamp half 11, 12 than in the area of the middle section 11c, 12c of the respective clamp half 11, 12. This can also provide a groove whose groove base 19 is contoured in a curved shape as described above, in particular along an oval or oval-segment-like contour such as along an ellipse segment.
[0036] It is also possible that the inner surface 15, 16 of each clamping clamp half 11, 12 is curved as described above, in particular oval or oval-segment-shaped, or elliptical-segment-shaped, and that the depth of the respective groove 17, 18 is also variable. This allows the curvature, in particular the ovality, in particular the elliptical segment shape, of the respective groove 17, 18 of the respective clamping clamp half 11, 12 to be adapted relative to the curvature, in particular the ovality, in particular the elliptical segment shape, of the respective inner surface 15, 16 of the respective clamping clamp half 11, 12.
[0037] If such a clamping clamp 10 is brought into contact or mounted on the flanges 22, 23 with the circular outer surfaces 34 of assemblies 24, 25 to be connected, then, in the untightened state of the clamping screws 13, the distance of the groove base 19 of the respective groove 17, 18 from the flanges 22, 23, namely the outer surfaces 34, is greater than in the area of the respective central section 11c, 12c. When the clamping screws 13 are tightened, the curved, in particular oval or oval-segment-like or elliptical or partially elliptical, contour is changed, preferably in such a way that after the clamping clamp halves 11, 12 are screwed together and thus after the clamping screws 13 have been completely tightened, the course of the respective groove base 19 is deformed into a circular segment, so that an equal clamping force is then exerted over the entire circumferential extent of the flanges 22, 23 of the assemblies 24, 25 to be connected.
[0038] Since the clamping clamp halves 11, 12 or their grooves 17, 18 are transformed from the curved, in particular oval or oval-segment-like shape, in particular the elliptical segment shape, described above into a circular segment shape when the clamping clamp halves 11, 12 are screwed together or when the screws 13 are tightened, the clamping clamp halves 11, 12 can easily be arranged on the flanges 22, 23 of the assemblies 24, 25 to be joined together, without the risk of jamming, when the clamping screws 13 are loosened.
[0039] Each of the clamping screws 13 extends through recesses or bores 26 of adjacent end sections 11a, 12a and 11b, 12b of the clamping clamp halves 11, 12. The recesses or bores 26 are arranged relative to each other, namely inclined, such that after the clamping clamp halves 11, 12 are screwed together and thus after the clamping screws 13 are tightened, the longitudinal axes 27 of the recesses or bores 26, through which a respective clamping screw 13 extends, run coaxially to each other.
[0040] In the untightened state of the clamping screws 13, the longitudinal axes 27 of these recesses or bores 26 form an angle β less than 90° with the parting plane of the clamping clamp halves 11, 12. This angle can be, for example, 88°, 89°, or 89.5°. The magnitude of the angle β less than 90° depends on the size of the clamping clamp halves 11, 12. Perpendicular to the longitudinal axes 27 of these recesses or bores 26, bearing surfaces 28 for a screw head of the clamping screws 13 or for a clamping nut form an angle of 90° - β with the parting plane of the clamping clamp halves 11, 12 in the untightened state of the clamping screws 13. In the tightened state of the clamping screws 13, the bearing surfaces 28 run parallel to the parting plane of the clamping clamp halves 11, 12.
[0041] In the illustrated embodiment of the Fig. 3, Fig. 4. The clamping screws 13 are held captive by locking pins 29 on one of the clamping clamp halves 11, 12. The respective locking pin 29 extends through a recess or bore 30 in the respective end sections 11a, 12a, 11b, 12b of the respective clamping clamp half 11, 12.
[0042] Fig. Figure 6 shows an arrangement consisting of an exhaust pipe section designed as a compensator 25 from an exhaust system with two clamping clamps 10 acting on the compensator 25. A clamping clamp 10 is arranged at each end of the compensator 25 to connect an exhaust pipe section 24 to the compensator 25 at the respective end. One clamping clamp 10 is used for this purpose. Fig. Figure 6 shows a clamping clamp 10 which has at least one material recess 31 distributed around its circumference in the area of each clamping clamp half 11, 12. Fig. 6 show two material recesses 31 for each clamping clamp half 11, 12.
[0043] Also in Fig. Figure 7 shows such optional material recesses 31. These material recesses 31 allow the stiffness of each clamping clamp half 11, 12 to be precisely adjusted, thus controlling its stiffness when the clamping screws are tightened and consequently its stiffness when transitioning from the curved contour described above, in particular the elliptical segment shape, to the circular segment shape. The material recesses 31 can be designed as crescent-shaped indentations. These recesses support the deformation of the clamping clamp halves 11, 12 to ensure the most homogeneous stress distribution possible in the area of the flanges 22, 23 and the sealing surface between the flanges 22, 23.Due to the homogeneous stress distribution in the area of the flanges 22, 23 and the increased tightness provided thereby in the area of the sealing surface between the flanges 22, 23, the clamp connection with the clamp 10 according to the invention is particularly suitable for exhaust systems of internal combustion engines that burn methanol, ammonia or hydrogen as fuel.
[0044] In an exhaust system of an internal combustion engine, exhaust pipe sections 24, 25 to be connected to each other are made of a ferritic material at least in the area of their flanges 22, 23.
[0045] The invention preferably provides for the clamping clamp 10 to also be manufactured from a ferritic material. The exhaust pipe sections 24, 25 to be connected and the clamping clamp 10 then have identical or very similar coefficients of thermal expansion. This ensures that, despite thermal expansion during operation, the clamping force on the flanges 22, 23 and thus the connection via the clamping clamp remains unchanged or almost unchanged.
[0046] The clamping bracket 10 and the exhaust pipe sections 24, 25, at least in the area of their flanges 22, 23, can also each be made of an austenitic material. Accordingly, the clamping bracket 10 and the exhaust pipe sections 24, 25 are made, at least in the area of their flanges 22, 23, of an identical or similar metallic material with an identical or nearly identical coefficient of thermal expansion.
[0047] In the preferred embodiment of the invention, the groove base 19 of the respective groove 17, 18 extends along a curved contour such that, with the clamping clamp halves 11, 12 unconnected or with the clamping screws 13 not tightened, the distance of the groove base 19 of the respective groove 17, 18 from the center point of the curved contour of the groove base 19 of the respective groove 17, 18 is greater at the end sections 11a, 12a, 11b, 12b of the respective clamping clamp half than in a central section 11c, 12c of the respective clamping clamp half. In this case, the flanges 22, 23 of the assemblies 24, 25 to be connected to one another via the clamping clamp 10, in particular the exhaust pipe sections of an exhaust system of an internal combustion engine 10 to be connected to one another, are preferably contoured circularly on their outer surfaces 34.
[0048] Alternatively, when using a conventional clamping clamp, or additionally, when using a clamping clamp according to the invention, it is possible that an outer surface 34 of the respective flange 22, 23 of the exhaust pipe sections 24, 25 of an exhaust system facing the respective groove base 19 runs along a curved contour, such that, with unconnected clamping clamp halves 11, 12 or with untightened clamping screws 13, the distance of the groove base 19 of the respective groove 17, 18 from the outer surface 34 of the respective flange 22, 23 facing the respective groove base 19 is greater at the end sections 11a, 12a, 11b, 12b of the respective clamping clamp half 11, 12 than in a central section 11c, 12c of the respective clamping clamp half 11, 12.
[0049] Fig. Figure 9 shows a highly schematic representation of a conventional clamp half 11, the inner surface 15 of which is contoured in a circular segment shape with diameter D, the depth of its groove being constant, so that the groove base 19 is also circular segment shape, together with a flange 22, 23, the outer surface 34 of which facing the groove base 19 runs along a curved contour. In this respect, Fig. 9 the outer surface 34 facing the groove base 19 is contoured oval, in particular elliptical. Fig. Figure 9 shows the center point M' and the dimensions a', b' of the elliptically contoured outer surface 34 of the flange 22, 23. The dimension a', which defines the extent of the flange 22, 23 or its outer surface 34 towards the central section 11c of the clamping clamp half 11, is larger than the dimension b', which defines the extent of the flange 22, 23 or its outer surface 34 towards the end sections 11a, 11b of the clamping clamp half 11, such that, with the clamping clamp halves not connected or with the clamping screws not tightened at the end sections 11a, 11b, the Fig. 9 shown clamping clamp half 11, the distance of the groove base of the groove from the outer surface 34 of the respective flange 22, 23 facing the respective groove base is greater than in a central section 11c of the clamping clamp half 11.
[0050] The clamping clamp 10 can also be advantageously used for connecting insulating panels. The design of the clamping clamp 10 allows for the direct support and fastening of insulating panels, which are advantageously designed in two parts. The panel halves can be fastened by screwing them to the clamping clamp 10 or by clamping them together on the clamping clamp 10. The design of a clamping clamp 10 according to Fig. 2. Insulating formwork can be applied directly along the circumference. With a clamping clamp design 10 according to Fig. 1. Contoured insulating formwork should be used or spacers should be used between the outer shape of the clamping clamp 10 and the inner shape of an insulating formwork. Reference symbol list 10 clamps 11 Tension clamp half 11a Final section 11b Final section 11c Middle Section 12 clamp halves 12a Final section 12b Final Section 12c Middle Section 13 Tensioning screw 14 Mother 15 interior surface 16 interior surface 17 Nut 18 Nut 19 Groove 20 clamping surface 21 clamping surface 22 flange 23 flange 24 Assembly / Exhaust pipe section 25 Assembly / Exhaust pipe section 26 bore 27 Longitudinal axis 28 contact surfaces 29 Safety pin 30 bore 31 Material recess 32 cross bolts 33 Exclusion 34 outdoor area
Claims
[1] Clamp (10) for connecting assemblies or exhaust pipe sections (24, 25), with a first clamping clamp half (11), with a second clamping clamp half (12), with clamping screws (13) for connecting the clamping clamp halves (11, 12) at adjacent end sections (11a, 12a, 11b, 12b) of the clamping clamp halves (11, 12), wherein a groove (17, 18) for flanges (22, 23) of the assemblies or exhaust pipe sections (24, 25) to be connected via the clamping clamp (10) is provided in an inner surface (15, 16) of each clamping clamp half (11, 12), wherein each groove (17, 18) has a groove base (19) and clamping surfaces (20, 21) angled at a defined angle to the groove base (19), characterized by , that the groove base (19) of the respective groove (17, 18) runs along a curved contour, such that, in the case of unconnected clamp halves (11, 12) or untightened clamping screws (13), the distance of the groove base (19) of the respective groove (17, 18) from a center point of the curved contour of the groove base (19) of the respective groove (17, 18) at the end sections (11a, 12a, 11b, 12b) of the respective clamp half (11, 12) is greater than in a central section (11c, 12c) of the respective clamp half (11, 12). [2] Clamping clamp (10) according to claim 1, characterized by, that the inner surface (15, 16) of the respective clamping clamp half (11, 12) is contoured in such a curved manner that, in the case of unconnected clamping clamp halves (11, 12) or untightened clamping screws (13), the distance of the respective inner surface (15, 16) from a center point of its curved contour is greater than in a central section (11c, 12c) of the respective clamping clamp half (11, 12), wherein a depth of the respective groove (17, 18) is constant. [3] Clamping clamp (10) according to claim 1, characterized by , that the inner surface (15, 16) of the respective clamping clamp half (11, 12) is contoured in a circular segment shape when the clamping clamp halves (11, 12) are not connected or when the clamping screws (13) are not tightened, wherein the depth of the respective groove (17, 18) along the respective clamping clamp half (11, 12) is variable. [4] Clamping clamp (10) according to claim 1, characterized by, that the inner surface (15, 16) of the respective clamping clamp half (11, 12) is contoured in such a curved manner that, when the clamping clamp halves (11, 12) are not connected or when the clamping screws (13) are not tightened, the distance of the respective inner surface (15, 16) from a center point of its curved contour is greater than in a central section (11c, 12c) of the respective clamping clamp half (11, 12), wherein the depth of the respective groove (17, 18) along the clamping clamp half (11, 12) is variable. [5] Clamping clamp (10) according to one of claims 1 to 4, characterized by , that the shape of the respective curved contour is chosen such that after screwing the clamping clamp halves (11, 12) together via the clamping screws to connect the assemblies or exhaust pipe sections (24, 25) to be connected via the clamping clamp the respective curved contour is deformed into a circular segment. [6] Clamping clamp (10) according to one of claims 1 to 5, characterized by , that each clamping screw (13) extends through recesses or bores (26) of adjacent end sections (11a, 12a, 11b, 12b) of the clamping clamp halves (11, 12), the recesses or bores (26) are inclined in such a way that, after the clamping clamp halves (11, 12) are screwed together via the clamping screws (13), the longitudinal axes (27) of the recesses or bores (26) through which a respective clamping screw (13) extends run coaxially. [7] Clamping clamp (10) according to one of claims 1 to 6, characterized by , that in each of the clamping clamp halves (11, 12) at least one material recess (31) is provided, via which the stiffness of the respective clamping clamp half (11, 12) is adjusted. [8] Tension clamp (10) according to one of claims 1 to 7, characterized by , that the clamping clamp halves (11, 12) are made of a ferritic material. [9] Exhaust system of an internal combustion engine, with a first exhaust pipe section (24), a second exhaust pipe section (25), characterized by , that the exhaust pipe sections (24, 25) are connected to each other via a clamping clamp (10) according to one of claims 1 to 8. [10] Exhaust system according to claim 9, characterized by , that an outer surface (34) of the respective flange (22, 23) facing the respective groove base (19) runs along a curved contour, such that, in the case of unconnected clamp halves (11, 12) or untightened clamping screws (13), the distance of the groove base (19) of the respective groove (17, 18) from the outer surface (34) of the respective flange (22, 23) facing the respective groove base (19) is greater than in a central section (11c, 12c) of the respective clamp half (11, 12). [11] Exhaust system according to claim 10, characterized by, that the inner surface (15, 16) of the respective clamping clamp half (11, 12) of the clamping clamp (10) is contoured in a circular segment shape, and that a depth of the respective groove (17, 18) is constant. [12] Exhaust system according to claim 9, 10 or 11, characterized by , that the exhaust pipe sections (24, 25) at least in the area of their flanges (22, 23) to be connected via the clamping clamp (10) and the clamping clamp (10) are made of an identical or similar metallic material. [13] Exhaust system according to claim 12, characterized by , that the exhaust pipe sections (24, 25) at least in the area of their flanges (22, 23) and the clamping clamp (10) are each made of a ferritic material or of an austenitic material.