JPH0333896B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a device for movably connecting tube sections in a motor vehicle exhaust system, comprising at least one corrugated tube, metal tube or the like.
It consists of two flexible conduit sections and is connected to the ends of the flexible conduit sections, with a support for an external damping cushion.

Such a device for movably coupling two conduit sections, in particular an exhaust outlet and an exhaust system of a motor vehicle engine, is disclosed in German patent application no.
It is described in the specification of No. 2838990. Such devices are used to allow relative movement between the engine and the exhaust system while increasing the durability of the exhaust system. In the known device, two connecting flanges arranged at the connecting ends of the tubes are pierced by pins through which they are elastically clamped by spring elements.

Such structures are complex and therefore susceptible to damage. Furthermore, although in the known device the relative movement between the engine and the exhaust system is indeed damped, the relative movement between the engine and the exhaust system is not decoupled due to the arrangement of the spring element.
Engine vibrations are transmitted to the exhaust system, which creates noise in the exhaust system and causes premature wear of the exhaust system. It has already been proposed to provide a damping element in addition to the spring element, or in some cases in combination with the spring element. In this case, the damping element basically corresponds to the damping properties of the spring. In addition, a spring member having elastic properties and characteristics that tend to resonate is disposed, and since these elastic characteristics and characteristics that tend to resonate are reduced only by the frictional force pressing against each other, the relative movement between the exhaust system and the engine is reduced. A sufficient effect of reducing the noise of the exhaust system and the disconnection of the exhaust system cannot be obtained.

The object of the invention is to provide a movable connection of pipe sections in a motor vehicle exhaust system, which reliably reduces engine movements and exhaust system movements and ensures optimum noise reduction of the exhaust system. The aim is to provide a reliable device that is simple and therefore sturdy.

According to the present invention, the support members overlap each other on the outside of the conduit portion to form a plurality of casing-like pockets, and in these pockets, a press-formed metal wire is inserted. A cushioning cushion is housed, and the plurality of pockets are movable relative to each other while being cushioned by compressing the cushioning cushion.

According to the invention, no spring elements are used, but instead a highly effective shock absorbing cushion made of pressed metal wire, such as a pressed wire fabric made of wire mesh, intertwined wire, etc. is used. This shock absorbing cushion is adapted to be displaced from its unloaded shape by applying stress under any conditions, to strongly buffer the stress, and to almost asymptotically return to its original shape. This shock absorbing cushion has virtually no spring-elastic properties, such as being displaced in one direction and then overswinging in the other direction after the stress is released.

The basis of the idea of the invention is that springs of the type commonly used in the prior art are not used, but instead a cushioning cushion is used. Buffer cushions, unlike springs such as spiral springs, have a strong gradual characteristic in a graph showing the relationship between spring force and spring displacement. The buffered kinetic and vibrational energy is quickly converted into thermal energy,
This converted heat energy can be rapidly extracted due to the good thermal conductivity of the cushion material, i.e. the metal, and the intermediate chamber within the cushion. Although the temperature of the exhaust gas reaches up to 1100°C, the temperature inside the buffer cushion is maintained within the range of 200°C to 250°C, so that there is no risk of damage to the cushion material due to the high temperature.

This design also avoids a complicated construction with a tightening nut and a pin movably guided in the connection. The support members forming the casing-like pocket are all connected to corresponding ends of the flexible conduit section, with one part of the support member being closely attached to one end of the corrugated tube. The connecting tube piece is advantageously formed by stamping and correspondingly molding. The device according to the invention can therefore be manufactured in a technically simpler manner compared to known devices.
The decoupling of the relative movement between the engine and the exhaust system by means of the device according to the invention makes it possible to meet the requirements placed on the exhaust system of the respective motor vehicle by optimally combining the embodiments of the invention.
The device according to the invention has sufficient mobility even in the case of large vibrations in the low-frequency vibration range and has strong damping properties in the noisy vibration range. The structure of the present invention allows for the use of lighter exhaust and mounting equipment.

The structure according to the invention makes it possible to buffer tensile, compressive, angular and lateral loads of the corrugated tube depending on the respective requirements. In this case, one or the other of the damping cushions arranged one after the other in the axial direction is loaded with pressure. It is also possible to provide only one damping cushion between the two counters. This cushioning cushion is additionally fixedly connected to the support, for example by welding, gluing or the like, so that it can also withstand tensile loads.

If necessary, a number of supports for the cushioning cushions, in each case arranged one after the other, are provided;
The support may be fixedly coupled to one or the other end of the conduit section.

To hold the cushioning cushion in the radial direction,
The cushioning cushion is arranged in a housing with a housing-like pocket, which is formed by a support element and forms a corresponding receptacle for the cushioning cushion. In this case, the support has an end surface with a substantially radially extending vertical surface as a counter for the damping cushion, which end surface is connected to a support member attached to each end of said conduit section. is formed.
In addition, at least the wall closure part of the casing-like pocket for the cushioning cushion is formed by an annular support arranged on a rod passing through the cushioning cushion approximately in the center, and the rod has at least one the shock absorbing cushion is fitted over the rod through a centrally formed through hole, and the rod is fixedly connected to the support. Good too. In another embodiment,
At least the support part has a radially extending bend, the ends of which each form a corresponding receptacle.

The positioning of the support forming the pocket, as well as the damping cushion provided in this support, is obtained primarily depending on the direction of the main component of motion to be damped. In order to damp primarily axial movements, the support has end faces with substantially axially extending vertical surfaces as counter-receiving for the damping cushions, these end faces being provided with vertical surfaces extending in the said conduit. It is formed in a support member attached to each end of the section.
Conversely, in order to dampen radially acting movements, such as angular or lateral movements, the support should be
It has an end surface with a generally radially extending vertical surface as a counter for a damping cushion, which end surface is formed on a support member attached to the conduit section. In order to dampen movements in the respective main direction of movement, and also to dampen movements in other directions, this is done by correspondingly designing the damping cushion. Whereas in a rotationally symmetric damping cushion, lateral forces in a plane perpendicular to the longitudinal direction are not damped, but only torsion, in an advantageous embodiment of the invention the damping cushion is non-rotating. It is constructed in a symmetrical shape. With this configuration, lateral forces can also be buffered. Laterally acting movements in the center of the damping element are caused by its bending from its central area towards its edge area, i.e. in particular due to the absence of a right angle between the end face and the outer circumference. It is buffered by this. Whereas the shape of the cushioning cushion is obtained by being placed in a pocket formed by the support and tightened, according to an advantageous embodiment of the invention, the cushioning cushion is provided in the form of a casing. It is pre-pressed into the shape of the pocket. The main problem with this type of exhaust system for motor vehicles is that there is relatively little space in the area of the exhaust system, at least in certain directions. For this reason, the cushioning cushions are arranged uniformly around the flexible conduit section. However, since the flexible conduit section already occupies a very large space in the radial direction, for example because the bellows waves protrude beyond the radius of the tube section of the device, the immediate surroundings of the flexible conduit section do not have sufficient space. Often there is no space. For this,
According to another embodiment of the invention, the cushioning cushion is arranged axially offset next to the flexible conduit section. In particular, if the vertical line to the plane of the support extends radially, according to an embodiment of the invention, one support for each damping cushion is located at one end of the flexible conduit section. a web fitted over the outer periphery of the connecting end of the flexible conduit section; the other support section rests on the section connected to the other end of the flexible conduit section; If a twin-pipe arrangement or double-pipe arrangement is provided, which is constructed as an overpassing pipe section, there is sufficient space in series with this double-pipe arrangement and sufficient space perpendicular to this direction. If free space does not exist, the support with the cushioning cushion is arranged in series approximately in the same plane as the juxtaposed tube sections. However, if space conditions are different, the supports with damping cushions can be arranged laterally between the conduit sections. That is, in each case it is offset directly over the flexible conduit section or it is offset in the axial direction. In principle, it is not necessary to apply stress to the cushioning cushion, but if it is desired to apply stress, it can be applied or adjusted in a suitable manner. For this purpose, according to a further embodiment, the corresponding receiving surface of the support is formed by a threaded disc that is screwed into the threaded sleeve. According to another embodiment, protrusions are formed on at least the end surface of the support part and protrude inward at equal intervals over the outer periphery of the end surface, and between the end surface of the support part and the buffer cushion. , a disk having rows of openings corresponding to the number of the protrusions is disposed, and the diameters of the apertures are different from each other, and the diameter of the opening with the largest diameter is the same as the number of the protrusions. The angle of the disc is adjusted from the outside.

Next, the configuration of the present invention will be specifically explained with reference to the embodiments shown in the drawings.

2 of the device according to the invention for movably coupling the engine and exhaust system of a motor vehicle in FIG.
One embodiment first has a corrugated tube or bellows 11 as a flexible conduit section. A tube piece 12 is arranged inside this bellows 11,
One end 13 of this tube piece 12 is rigidly connected to one end 14 of the bellows 11. This one end 14 of the bellows 11 has a connecting flange 16
is fitted, by means of which connecting flange 16 the device or bellows 11 according to the invention is fixed to the motor vehicle engine (not shown). The other end 17 of the bellows 11 is connected directly or, as in the illustrated embodiment, via a tube piece 18 rigidly connected to this end 17 to the exhaust system (not shown) of the motor vehicle. In this case, the other end 1 of the tube piece 12
9 ends freely inside the tube piece 18. Such a construction provides a flexible, gas-tight conduit for the exhaust gas flow guided from the engine to the exhaust system.

The upper and lower halves of FIG. 1 each show cross-sectional views of axisymmetric structures of different embodiments.

Tubular support members 21 and 22 facing each other are fixed to the ends 14 and 17 of the bellows 11 by, for example, welding. These supporting members 21, 22
are the end regions of the bellows 11 opposite to the ends 14, 17, respectively, of the damping cushions 27, 28.
A corresponding receiver 23 formed as a support for the
24 and 26 (see the top of FIG. 1).
In this case, the corresponding receiver 23 is a tubular support member 21
It is formed by a radially outwardly directed double-walled bend or fold of. The cushioning cushions 27, 28 abut on both sides of the corresponding receiver 23. Corresponding receiver 24 (upper half of Figure 1)
is formed by an obliquely outwardly directed bend of the substantially axially extending support element 22, that is, an extension as a type of receiving sleeve.
The counterpart receiver 26 is a section of a sheet metal ring that is bent diagonally inward. This division of the corresponding receiver 26 is made on the radial plane of the corresponding receiver 23.
It is firmly fixed to the support member 22 in the range of , with its edges bent. The buffer cushion 27 has a corresponding support 2
4 and one side of the corresponding receiver 23. Buffer cushion 28 contacts counter-receiver 26 and contacts the other side of counter-receiver 23. Support member 22 with a corresponding receiver 24 and a corresponding receiver 26
and a section extending approximately axially on both sides of the counter-receiving member 23, which forms a casing 29, 31 or a counter-receiving member 2 for two damping cushions 27, 28.
3, forming two casing-like pockets on both sides.

The embodiment shown in the lower half of FIG. 1 is substantially similar to the embodiment shown in the upper half, but with the support member 2
The axially extending section 2' has an annularly configured damping cushion 27, as in the embodiment shown in the upper half of the drawing.
24'
It terminates in a conical extension. An open-topped sheet metal ring with a tank-like cross-section is fixed to this conical extension as a housing-like support 32 . In the embodiment shown, this sheet metal ring has a trapezoidal cross-sectional shape, with one leg extending from one of the corresponding receivers.
4', the other leg forming the other counterreceiver 26'. This sheet metal ring extends into the conical extension of the left-hand tubular support member 22' and into the right-hand shock absorber 28 and is tightened using screws via integrally formed tongues ( (not shown). The support part 32 and the axially extending section of the support element 21 also form a housing-like pocket for the cushioning cushions 27, 28 in this embodiment.

The device formed in this way for movably connecting the engine and exhaust system of a motor vehicle consists, on the one hand, of a bellows 11 and a tube piece 18 connected to the end 17 of this bellows 11. It forms a completely gas-tight conduit for the exhaust gas flow and is supported on the other hand by support elements 21, 22 or 21', 22' and support 32. Corresponding receiver 23, 24, 26 or 2 for cushioning cushions made from pressed metal wire
By configuring 3', 24', and 26' as described above, the exhaust system can be completely shut out against the engine and its vibrations, and can be reliably coupled to the engine while suppressing resonance.

Instead of being provided rotationally symmetrically as shown in FIG. 1, the damping cushions may also be arranged in uniform segments around the outer circumference of the flexible conduit section or bellows 11. According to the invention, this is arranged between flange-like parts connected to both ends of the bellows 11 in the following manner.

In the embodiment shown in FIG. 2 of the device according to the invention, the support member 41 is rigidly connected to the end 17 (see FIG. 1) of the bellows 11, which is connected on the one hand to an exhaust device (not shown). On the other hand, it is firmly connected to the end 13 of the bellows 11, which is connected to the engine. Although details are not shown, the support members 41 and 42 may have a range extending in the axial direction. The ends of the support members 41, 42 have a shape corresponding to the cushioning cushions 47, 48, and have corresponding receivers 4 for the cushioning cushions made of metal wire.
It is designed as a casing-like pocket with 3,44. The shock absorbers 47, 48, like the counters 43, have a gap in the center through which the rod 49 passes. On the one hand, this rod 49 is rigidly connected to a counter-receptacle 44, for example by welding, and on the other hand, it has a plate as a further counter-receptacle 46. The corresponding receivers 44 and 46 are indirectly arranged on the end 13 of the bellows 11, and the corresponding receivers 43
is connected to the end 17 of the bellows 11. The cushioning cushions 47, 48 are connected to the corresponding receiver 44 on the one hand.
and the corresponding receiver 43, on the other hand, and between the corresponding receiver 43 and the corresponding receiver 46, so that they act during the reciprocating motion of the vibration. In addition, the counters 44, 43 partially bridge the damping cushions 47, 48 in a housing-like manner in the axial direction, so that lateral movements are also accommodated and damped. Buffer cushion 47, 48
is additionally held by a rod 49.

In FIG. 3 (as in FIG. 2) a cushioning cushion made of metal wire is arranged in a casing 61 with individual pockets, which casing 61 is connected via a support member 51 to the end 17 of the bellows 11. It is formed by corresponding receivers 53, 53' connected to. In this case, the counter receiver 53 is formed integrally with the holding member 51, and the counter receiver 53' is rigidly connected to the counter receiver 53, for example by welding. In addition, the holding and buffering device is
It has a retaining member 52 rigidly connected to the end 13 of the bellows 11 (see FIG. 1). This retaining member 52 may be attached to the connecting flange 16 as the case may be.
(See FIG. 1).
In any case, the holding portion 52 has a rod 49.
(See Figure 2)
are rigidly connected. A ring-shaped corresponding receiver 54 as a support portion is attached to the rod 59 at the center between the two corresponding receivers 53 and 53'. The cushioning cushions 57, 58 are arranged on the one hand between the corresponding receivers 53' and 54, and on the other hand between the corresponding receivers 54 and 53, and are arranged by means of these receivers. Surrounded by a casing. The mode of operation of this device is basically the same as that of the device in the previous embodiment.

In the alternative embodiment shown in FIG. 4, the same parts as in the previous embodiment are marked with the same reference numerals. A tube piece 12 is arranged within the bellows 11 , and the end 13 of this tube piece 12 is fixed to the end 14 of the bellows 11 . A connecting flange 16 is fitted over one end 14 of the bellows 11. A tube piece 18 is connected to the other end 17 of the bellows 11 and has two projecting flanges 71 which can be connected to an exhaust device.
At the outer end of the connecting flange 16 or flange part 71, a housing-like pocket is provided for a damping cushion 77 with corresponding receptacles 73, 74 as supports. In this case, the damping cushion 77 is not only arranged between the corresponding receivers 73 and 74, but also firmly connected to these receivers, so that even when tensile stress is applied, the cushioning cushion 77 These can be buffered. The corresponding receivers 73, 74 themselves are connected to the connecting flange 16 or tube piece 1 used as a support member.
It is firmly connected to the flange portion 71 of 8. This configuration ensures, on the one hand, a reliable sealing of the exhaust gas flow from the engine to the exhaust system, and, on the other hand, a universal shock absorber with a shock absorber made of pressed metal wire, for example of noble metal. is provided. This shock absorber reliably interrupts the transmission of engine vibrations to the exhaust system, thereby preventing resonance and providing a good noise damping effect.

Other embodiments are possible within the scope of the invention. What is important in this case is that a damping element consisting of a pressed wire in the form of a cushion is used, which damping element is inserted into the pocket between at least two corresponding receivers which are rigidly connected to the ends of the corrugated tube. It is located in . In this case, if only two corresponding supports are provided in the axial direction,
A wire coupling is firmly connected to this mating receiver. If two or more mating receptacles are provided axially in series with one another, the wire fabric cushion can simply be inserted between the mating receptacles.
Instead of providing only one bellows, a device may be provided with two parallel bellows or twin bellows in a double tube configuration.

Such an embodiment is illustrated in FIGS. 5a, 5b, 7a, 7b and 9a, 9b.

FIG. 5a shows a longitudinal cross-sectional view of a portion of the shock absorber having a double tube structure. In this case, only the upper half is shown, whereas the lower half is omitted. Although the bellows in Figure 5a is slightly offset, it is approximately mirror symmetrical about axis A--A. This also applies to the embodiments of FIGS. 7a and 7b to 10a and 10b. Hereinafter, the same parts as in the above embodiment are marked with the same reference numerals. The device according to the embodiment shown in FIGS. 5a and 5b has a bellows 11 and a bellows 11' arranged adjacent to the bellows 11 as a movable conduit part of the double tube device. are doing. A tube piece 12, 12' is arranged in each bellows 11 or 11',
The ends 13, 13' of these tube pieces 12, 12' are connected to the connecting flange 16 together with one end 14, 14' of the bellows 11, 11'. (The type of connection of the bellows 11', the tube piece 12' and the connecting flange 16 is not shown in FIG. 5a.) Bellows 1
The other end 17 of 1 or 11' is, in the illustrated embodiment, rigidly fixed to a molded flange 18a, which will be described below. Instead of the shaped flange 18a, a straight flange may also be provided. Bellows 11,
The end 17 of 11' and the flange 18a may be rigidly connected to the tube piece to which the other part of the exhaust device is connected. In the embodiment shown, this connection takes place directly at the ends 17 of the bellows 11, 11'.

The explanation for Fig. 5a is basically Fig. 7a,
This also applies to the embodiments in FIGS. 7b, 10a, and 10b, so this FIG. 7a,
In FIG. 7b, FIG. 10a, and FIG. 10b, only the structural differences from FIG. 5a will be described below. I have omitted the explanation of the parts that have the same structure.

In motor vehicle exhaust systems, a fundamental problem is the space required. This means that the space for additional equipment, such as e.g. an exhaust system, is usually significantly limited in the vicinity of the exhaust pipe, in particular the bellows pipe, at least in one or the other direction orthogonal to the overall longitudinal direction of the exhaust system. has been done. In the embodiments of FIGS. 5a and 5b, bellows 11, 11' are used to save space.
The crests and troughs of the bellows are arranged offset from each other, and the crest of one bellows is fitted into the crest of the other bellows, so that the overall width of the bellows arranged next to each other is reduced in an advantageous manner. ing.

A further feature of the embodiment of FIG. 5a is that the support with the pocket for receiving the damping cushion is aligned in the upper part of the bellows 11, 11' to the side of this bellows 11, 11' via a rigid tube section. It has been placed. Molded flange 18 as rigid tube section
Two bowl-shaped supports 81 (only one of which is shown) are firmly connected to a. The bowl-shaped support part 81 consists of two bowl-shaped parts 8 that are connected to each other after providing the cushioning cushion 91.
It consists of 2.83. These pot-shaped parts 8
2, 83 have a plurality, preferably three, projections 86, 86' on their bottom parts 84, 84', which projections 86, 86' are connected to said bottom parts 84, 84'.
They are arranged at equal intervals along the outer periphery of the bottom parts 84, 84' with the axis of the bottom part 4' as the center, and protrude into the interior of the support part 81. One disc 84 is provided at the inner bottom 84, 84' of the pot-shaped parts 82, 83, respectively.
a, 84a' are provided. These disks 84
a, 84a' are provided with a plurality of openings 88 of continuously varying diameter on their outer peripheries at positions corresponding to the protrusions 86 on the bottoms 84, 84'. If the three protrusions 86, 86' are arranged at equal intervals on the bottoms 84, 84' of the pot-shaped parts 82, 83, the disks 84a, 84a' are also arranged at equal intervals on the bottoms 84, 84'.
It has a continuous row of openings. The disc 84a (see FIG. 5b) has a polygonal notch 89 in the center. Inside this polygonal notch 89, there is a bottom portion 84.
A tool can be engaged through the aperture 89a, thereby allowing rotation of the disk 84a. When the respective largest openings of the disc 84a meet the projections 86, the disc 84a completely contacts the bottom 84. When the disc 84a is adjusted via the polygonal notch 89 so that the aperture 88 with a smaller diameter matches the protrusion 86, the disc 84a is thereby slightly raised from the bottom 84 and the cushion cushion Since it is pressed more strongly against 81, the stress can be increased. Bottom portion 8 of pot-shaped portion 82
4' and thus through the center of the disk 84a' through which the pin 87 passes, no polygonal recess is provided here. Instead, the bottom 84' has an elongated arcuate opening 82a. Through this opening 82a, a tool can be engaged with the disk 84a' to adjust it in the manner described above. pin 8
The central support 96 consisting of a counter-receptacle 98 provided at 7 is shown in more detail in the alternative embodiment in FIG.

In FIG. 6, the pot-shaped support portion 81 has a pot-shaped bottom portion 92 forming a corresponding receiving surface.

The end of the support 81 opposite the bottom 92 is provided with or formed with a threaded sleeve 93 . A threaded disk 94 is screwed into the threaded sleeve 93, and the inner surface of the threaded disk 94 is formed into a dish shape corresponding to the dish-shaped bottom portion 92. and forms another corresponding receiving surface of the support portion 81. This dish-like shape has the following shape. In other words, the central range of the two corresponding receiving surfaces has a vertical plane that is parallel to the axes, while the edge range of the corresponding receiving surfaces is configured in a conical shape and is bent toward the inside of the bowl-shaped support part 81. It is being The pot-shaped support portion 81 is penetrated by another support portion 96 . This further support 96 comprises a corresponding disc with a pin 87 projecting into the support 81 and corresponding receiving surfaces fixedly resting on the pin 87 inside the support 81 and oriented in mutually opposite directions. 98. In this case, the counter-disk 98 is designed approximately as a double trapezoid, the conical surfaces extending beyond the pin 87 running parallel to the inclined annular surface of the base 92 or of the threaded disk 94, respectively. There is. The support part 81 does not have a lid also fixedly connected adjacent to the bottom part 84, which is fixedly connected to the support part 81, as in the embodiment of FIG. 5a, but instead: Since it has a threaded disc 94 that is screwed into the threaded sleeve 93 at different depths, the damping cushion 91 can be adjusted in the desired manner or, if necessary, can be post-adjusted. Ru.

A device for adjusting the stress, which is different from the threaded disk 94, i.e. the adjusting disk 84a, 84
a' is shown in FIG. 5a as before.

A further embodiment of the device according to the invention is shown in FIGS. 7a and 7b. In this embodiment as well, two bellows 11, 11' are arranged in parallel, and one end 14 of these bellows 11, 11' is fixed to a common connecting flange 16. Tube piece 12 extending into bellows 11, 11'
a or 12a' is not fixedly connected to the flange 16, but the other end 17 of the bellows 11 (also bellows 11') is connected to the tube piece 1.
It is mounted immovably on 2a. The tube piece 12a further extends from the bellows 11 and has a formed flange 18a at a predetermined distance from one end 17 of the bellows 11.

The embodiment shown in FIGS. 7a and 7b is shown in FIG. 5a.
Figure 5b is a modified embodiment of Figure 5b. The central axis or axis of symmetry of the support part 81, which is configured in the form of a bowl or pocket and is provided with a cushioning cushion 91, lies along the bellows 11, 1 arranged next to each other.
1', but laterally between bellows 11 and 11',
That is, it is arranged between the sections of the tube pieces 12a, 12a' which extend beyond the bellows 11 and 11'.
The support part 81 is arranged offset in the axial direction with respect to the bellows 11, 11' (see FIG. 7a).
Thereby, the support part 81
Since they are pressed closer together, as can be seen in FIG. 7b, less space is required in the direction perpendicular to the longitudinal direction than if they were arranged at the same height as 1'. The pot-shaped support 81 is formed by the upper open edge of the sleeve 101 being fixedly connected to the molded flange 18a. A pin 87a projects into the sleeve 101. This pin 87a
The end projecting from the sleeve 101 is fixedly connected to the connecting flange 16, preferably by welding. The pin 87a has a corresponding receiver 98 in the same manner as shown in FIG. 6, and cushion cushions 91 are arranged on both sides of the corresponding receiver 98. In the illustrated embodiment, the bottom 92 of the sleeve 101, the corresponding surface of the counter disk 98 and the corresponding area of the profiled flange 18a are configured as trapezoidal conical surfaces. The cushioning cushion 91 is formed to match the inner chamber of the sleeve 101 thus formed. By having a trapezoidal configuration,
By means of the damping cushion, not only axial forces are received and damped, but also bending stresses in a predetermined range are damped.

In all of the embodiments described above, the main focus is on receiving axial movement, and accordingly, the support part and the buffer member are arranged mainly parallel to the axis, and in particular, the support part and the buffer member are arranged parallel to the axis. The principal force is directed in the axial direction. On the other hand, in Figures 8a to 1
In the embodiment shown in Figure 0b, a radial arrangement is shown. In other words, the principal force of the perpendicular to the corresponding surface is directed primarily in the radial direction. Above all, such a structure dampens angular or bending movements. Whereas the device according to the embodiment of FIGS. 1 to 7b is arranged in the region of the connection between the non-air device and the engine block, the device according to the embodiment of FIGS. 8a to 10b is , are also provided for the exhaust system, especially for areas remote from the engine block. The embodiment of Figures 8a and 8b is for a single tube device. The bellows 11 is connected at one end 14 to a tube piece 12 which projects into the bellows 11. The connecting end 102 of this tube piece 12 projects from the bellows 11. A tubular connecting end 103 is fixed to the other end 17 of the bellows 11 . Connection end 1
03, there are two U-shaped members 10 facing each other.
4 (only one of which is shown) is fitted over the top. Web 1 of U-shaped member 104
06, an approximately cylindrical extension 107 is formed. Such a cylindrical additional part 10
7, a straight web 106 can also be fixed radially directly to the tube piece. U-shaped member 104 forms a support for cushioning cushion 108. The cushioning cushion 108 is surrounded by a threaded sleeve 109. Within this threaded sleeve 109 is a U-shaped member 10.
Threaded disc 1 on the opposite side from the web 106 of 4
11 is screwed in. Threaded sleeve 1
09 and the threaded disk 111 are the second support part 1
form 12. The support part 112 is fixed via an S-shaped tube section to the connecting end 102, which is connected to the bellows 11 at the end 13. This support 1 is provided by a support 112 with a threaded disc.
The stress of the cushioning cushion 108 located within the buffer cushion 12 is adjusted or post-adjusted. The device according to the illustrated embodiment dampens the relative angular movement of the two trailing ends 102 and 103. In the illustrated embodiment, two supporting parts 112 as damping devices facing each other are provided, but they have the form of corresponding pocket-like supporting parts, which are evenly divided and arranged in the outer circumferential area of the connecting end 103. A buffer member may be provided.

In the embodiment of FIGS. 9a and 9b, a double tube structure is shown. In this embodiment, the two connecting ends 103 are connected to each other by parallelly arranged flat bridges 116 (supports). A cylindrical tube piece 117 is welded to the bridge 116. This tube piece 117 is arranged at right angles to the plane formed by the axes of the two connecting ends 103. The tube piece 117 is surrounded by a corresponding threaded sleeve 109 provided with a threaded disc 111 . Threaded sleeve 109 is fixedly connected to support member 118. This support member 118 has two bellows 11, 11' and two bellows 11, 11'.
1', and is connected to the connecting end 102. By virtue of this arrangement, angular movements of the bellows 11, 11' out of the plane formed by the two axes are damped. In order to dampen axial and angular movements perpendicular to this angular movement, the threaded sleeve and damping cushion may be constructed in a shape other than cylindrical in relation to the form of the embodiment described above. Can be done. Alternatively, damping members may additionally be arranged on opposite sides of the connection end 103.

In the embodiments of FIGS. 8a to 9b,
10a and 10b, whereas the damping cushion itself always has a rotationally symmetrical shape (even if the end faces of the damping cushion are inclined, that is, not configured at right angles to the outer circumferential surface). In the embodiment described above, a non-rotationally symmetrical shock absorbing cushion is shown, which in principle can also be attached to the embodiment described above. This 10th
In FIG. a and FIG. 10b, the bellows 11,
The end 14 connected to the tube piece 12 has one stamping element 1 on each side facing each other in diameter of the tube piece 12.
21 is fixed, and this stamping member 121 is fixed at one end 14 of the bellows 11 in the illustrated embodiment.
A pocket-shaped support portion 122 is fixed to the projecting end. The support portion 122 is covered by a support portion 123. The support part 123 is fastened to a further stamping part 124 having an S-shaped cross section, which stamping part 124 rests on the other end 17 of the bellows 11 . A damping cushion 126 is inserted into the support part 122 and has a central through hole into which an additional part 127 of the support part 123 projects. In this way, the cushioning cushion 126 is attached to the pocket-like support 12.
2,123 is completely closed. As can be seen by comparing FIGS. 10a and 10b, which are cross-sectional views taken in directions perpendicular to each other, the inner and outer diameters of the cushion cushion 126 are different in the two orthogonal directions. The cushioning cushion 126 has a rectangular, oval or oval shape when viewed in cross section perpendicular to the drawing. In any case, it does not have a rotationally symmetrical shape. Buffer cushion 12
6 is provided on the bellows 11 and is arranged offset with respect to this bellows 11, so that the end face of the shock absorbing cushion is not rectangular but inclined with respect to the outer peripheral surface here as well. In addition to the flexural movements that take place in the drawing plane, which are mainly damped by such a shape, the axial movements as well as the rotationally symmetrical cross-sectional shape make it possible, in the illustrated embodiment, to move perpendicular to the drawing plane. Shearing movements acting on the cushioning cushion 126 are also damped. This shearing movement causes an undamped relative pivoting movement, at least insofar as the damping cushion has a cylindrical profile and is not fixedly connected to the auxiliary threaded sleeve.

The counters and cushioning cushions can also be arranged in different ways and can be designed in different shapes. Moreover, three or more buffer members can also be arranged one after the other. Furthermore, it is possible to combine different embodiments of the invention with each other, as long as the space requirements are sufficient and expedient based on the movements to be damped. Embodiments of the invention can be used individually or in combination with each other.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first and second embodiment of the device according to the invention in its upper and lower parts, respectively, and FIG. 2 is a cross-sectional view of a third embodiment of the device according to the invention.
3 is a sectional view showing a part of the fourth embodiment, FIG. 4 is a sectional view showing a part of the fifth embodiment, and FIG. 5a is a sectional view showing a part of the sixth embodiment. 5b is a plan view of the adjustment disc according to FIG. 5a, FIG. 6 is a sectional view of another embodiment of the support part in FIG. 5a, and FIG. FIG. 7b is a cross-sectional view along the line a-- of FIG. 7a of a seventh embodiment of the device according to the invention, FIG.
FIG. 8a is a sectional view taken along line a-a in FIG. 8b of the eighth embodiment; FIG. 8b is a sectional view taken along line bb of FIG. 8a; FIG.
The figure shows a sectional view taken along the line a-a in FIG. 9b of the ninth embodiment, FIG. 9b is a sectional view taken along the line b-b in FIG. 9a, and FIG.
Figure b is a sectional view taken along the line Xa-Xa, and Figure 10b is a sectional view taken along the line Xb-Xb in Figure 10a. 11, 11'... Bellows, 12, 12'... Tube piece, 13, 14... End, 16... Connection flange, 17... End, 18... Tube piece, 18a... Molded flange, 19 ... end, 21, 22, 21',
22'...Supporting member, 23, 23', 24, 24',
26, 26'... Corresponding receiver, 27, 28... Buffer cushion, 29... Casing, 31... Casing, 32... Support part, 41, 42... Supporting member, 43, 44, 46... Corresponding receiver ,47,48
...buffer cushion, 49...rod, 51,5
2... Support member, 53, 53', 54... Corresponding receiver, 57, 58... Buffer cushion, 59... Rod, 61... Support portion, 71... Flange portion, 7
3, 74... Corresponding receiver, 77... Buffer cushion, 81... Support part, 82, 83... Bowl-shaped part,
84, 84'...bottom, 84a, 84a'...disk,
86, 86'... protrusion, 87... pin, 88...
...Opening, 89...Polygonal notch, 91...Buffer cushion, 92...Bottom, 93...Threaded sleeve, 94...Threaded disk, 96...Support, 98...Corresponding circle Plate, 101...Sleeve, 1
02, 103...Connection end, 104...U-shaped member, 106...Web, 107...Additional part, 10
8...Buffer cushion, 109...Threaded sleeve, 111...Threaded disc, 112...
Support part, 113... pipe part, 116... bridge,
117...Tube piece, 118...Support member, 121...
... Stamping member, 122, 123 ... Support part, 12
4... Stamped member, 126... Cushioning cushion,
127...Additional part.

Claims (1)

[Scope of Claims] 1. A device for movably connecting pipe sections in the exhaust system of a motor vehicle, consisting of at least one flexible conduit section, such as a corrugated tube, a metal tube or the like; provided with a support for an external damping cushion connected to the end of the conduit section,
The support portions 23, 29, 23', 32; 43, 4
4,46,49;61,54;73,74;8
1,96;106,112;116;122,1
23 overlap each other on the outside of the conduit portions 11, 12 to form a plurality of casing-like pockets, in which the buffer cushions 27, 28 made of pressed metal wire are placed. ;47,48;57,58;9
1; 108; 126 are accommodated, and the plurality of pockets accommodate cushion cushions 27, 28;
8; 57, 58; 91; 108; 2 Said buffer cushion 27, 28; 47, 4
A number of supports 23, 29; 23', 32; 4 arranged one after the other for 8; 57, 58; 91;
3,44,46,49;54,61;73,7
4; 81, 96, 98, the supports being immovably connected to one or the other end 13, 14 or 17 of the conduit section 11, 12, respectively. The device according to item 1. 3 The support portions 23, 29; 23', 32; 43,
44, 46, 49; 54; 81, 96, 98,
The buffer cushions 27, 28; 47, 48; 5
7, 58; 91 with end faces with substantially axially extending vertical surfaces as counter-receptacles for the respective ends 13, 14 or 17 of said conduit sections 11, 12; Device according to claim 1, characterized in that it is formed in an attached support member (21; 41, 42; 51, 52). 4 Support part 106, 112, 116; 122, 1
23 has an end surface with a substantially radially extending vertical surface as a mating receptacle for the damping cushion 108, which end surface is connected to the conduit section 11,
support members 104, 113; 106, 118; 12 attached to each end 14 or 17 of 12;
1,124. 5. Claim 3, wherein the end face is bent from its central area towards its edge area.
Apparatus described in section. 6 Said buffer cushion 27, 28; 47, 4
8; 57, 58; 91; 108, 126 are pre-pressed into a casing-like pocket shape. 7. The device according to claim 1, wherein the cushioning cushion 126 is configured in a non-rotationally symmetrical shape. 8. The device according to claim 1, wherein a damping cushion 77 made of a pressed metal wire is immovably connected to the supports 73, 74. 9 Said buffer cushion 47, 48; 57, 5
8; at least the wall closing portion of the casing-like pocket for 91 is connected to the cushioning cushion 4;
7, 48; 57, 58; formed by annular support portions 46, 54, 98 disposed on rods 49, 59, 87 penetrating approximately in the center of 91;
Said rod 49, 59, 87 passes freely through at least one further support 43; 61; 87
The rod 49, 59,
2. The device of claim 1, wherein 87 is fixedly connected to the support member 42, 52, 16. 10. Claim 1, wherein at least the support members 21, 21' have a radially extending bent portion, and both end faces of the bent portion form corresponding receivers 23, 23', respectively. The device described. 11. Part of the mating receptacle is molded by a stamping and/or molding in the connecting piece 18 which is closely connected to the end of the flexible conduit section 11. The device according to scope 1. 12 Buffer cushion 28, 27; 47, 48;
57, 58; 77; 91; 108, 126 are arranged uniformly around the flexible conduit section (11). 13 Buffer cushion 27, 28; 47, 48;
77; 91; 126 are arranged radially beyond the flexible conduit section 11. 14. Device according to claim 1, in which the damping cushions 91, 108 are arranged axially offset next to the flexible conduit section 11. 15 One support 112 for each damping cushion 108 connects the connecting end 10 at one end 17 of the flexible conduit section 11
Webs 106, 11 fitted over the outer periphery of 3
6 and the other support rests on the part connected to the other end 14 of the flexible conduit section 11 and is configured as a conduit section 113, 118 beyond this conduit section 11. 15. The apparatus of claim 14, wherein: 16. Device according to claim 1, characterized in that the stress of the support parts 81, 98; 106, 112; 116 acting on the cushioning cushions 91, 108 can be varied. 17. Device according to claim 16, in which the corresponding receiving surfaces of the supports 81, 112 are formed by threaded discs 94, 111 screwed into threaded sleeves 93, 109. 18 This end surface 8 is attached to at least the end surface 84 of the support part.
Projections 86 protruding inward are formed at equal intervals over the outer periphery of the supporting portion 84 .
and the buffer cushion 91, the protrusion 86
a disk 84 with rows of apertures 88 corresponding to the number of
a are arranged, the diameters of the openings 88 are different, and the diameter of the opening with the largest diameter approximately corresponds to the outer circumference of the projection 86, and the disc 84a 17. The device according to claim 16, wherein the angle is adjustable from the outside. 19 Support part 23, 29, 23', 32; 43,
44, 46, 49; 61, 54; 73, 74, 8
1,96;98;106,112;116;12
2. A device as claimed in claim 1, in which the flexible conduit section 11 is fixedly connected to the end 14 or 17 of the flexible conduit section 11, respectively.