Replacement stent system

Abstract

The invention relates to a changeover support system, in particular for a work station for producing components of exhaust systems for internal combustion engines, comprising a basic unit (22) and a support unit (68) which can be detachably fixed to the basic unit (22) in a work position, wherein a coupling / fixing arrangement (30) is provided on the basic unit (22) and a mating coupling / fixing arrangement (89) is provided on the support unit (68), which can be brought into a form-locking coupling engagement with the coupling / fixing arrangement (30) when the support unit (68) is moved in a sliding movement into the work position in a sliding movement direction (S), and the support unit (68) can be fixed with respect to the basic unit (22) by means of the coupling / fixing arrangement (30) when the support unit (68) is positioned in the work position.

Description

TECHNICAL FIELD

[0001] The invention relates to a changeover support system which can be used in a particularly advantageous manner in a work station for manufacturing components for exhaust systems of internal combustion engines. BACKGROUND

[0002] In the manufacture of components for exhaust systems of internal combustion engines, for example catalytic converters, particle filters or assembly structures of a plurality of such systems which act for exhaust purification, the components or their components are usually connected to one another by welding using a welding robot. For this purpose, the components which are to be processed or manufactured in this way are positioned in the work station in such a way that a welding robot which carries out the connection process has access to the components or components which are to be welded. SUMMARY

[0003] In order to be able to set the components which are to be manufactured or processed in such a work station in the work station, a changeover support system can be used which comprises a basic unit which is fixed on the work station and a support unit which is to be connected to the basic unit and supports the components or components which are to be processed or manufactured, and the task of the invention is to provide a changeover support system of this kind with which a quick and reliable positioning of the components to be processed can be ensured for carrying out the work process.

[0004] According to the invention, the stated task is solved by a changeover support system according to the invention, in particular for a work station for manufacturing components for exhaust systems of internal combustion engines. The changeover support system comprises a basic unit and a support unit which is to be detachably fixed on the basic unit in a work position, a coupling / fixing arrangement is provided on the basic unit and a mating coupling / fixing arrangement is provided on the support unit, the mating coupling / fixing arrangement can be brought into a form-locked coupling engagement with the coupling / fixing arrangement when the support unit is moved into the work position in a sliding movement, and the support unit can be fixed with respect to the basic unit by the coupling / fixing arrangement when the support unit is positioned in the work position.

[0005] In the changeover support system according to the invention, the basic unit and the support unit are first brought into a state by the form-locked coupling engagement when moved into the work position, in which state the basic unit and the support unit can then be fixed in a temporarily fixed manner to one another by the fixing action of the coupling / fixing arrangement for carrying out the work process. Such a changeover support system is simply constructed and universally usable and enables a time-saving implementation of the process for mounting the respective support unit on the basic unit or also for detaching the support unit from the basic unit.

[0006] It should be noted that within the meaning of the present invention, when the bracket unit is moved in the sliding direction, the bracket unit is moved in a direction of movement in which the bracket unit approaches the working position and finally reaches the working position. In order to release the bracket unit from the base unit, i.e., to move the bracket unit out of the working position, the bracket unit is moved relative to the base unit in a direction opposite to the sliding direction of movement.

[0007] In order to enable the bracket unit to move to the working position in a defined manner, it is proposed that a sliding guide forming part is provided on the basic unit and a mating sliding guide forming part is provided on the bracket unit. When the bracket unit moves to the working position along the sliding movement direction, the bracket unit is guided by the mating action of the mating sliding guide forming part of the sliding guide forming part for movement along the sliding movement direction.

[0008] In a design scheme that is simply constructed but nevertheless functions reliably, one of the sliding guide forming part and the mating sliding guide forming part, preferably the sliding guide forming part, may include two sliding guide recesses that are opposite to each other and open to each other transversely to the sliding movement direction and extend in the sliding movement direction, and the other of the sliding guide forming part and the mating sliding guide forming part, preferably the mating sliding guide forming part, may include two sliding guide protrusions that are oriented away from each other transversely to the sliding movement direction and extend in the sliding movement direction. When the bracket unit moves along the sliding movement direction toward the working position, each sliding guide protrusion is accommodated in a sliding guide recess for movement in the sliding movement direction.

[0009] In order to specify the working position of the bracket unit relative to the basic unit, a movement stop can be provided on the basic unit, and a matching movement stop can be provided on the bracket unit. When the bracket unit moves into the working position along the sliding movement direction, the matching movement stop abuts against the movement stop when the working position is reached.

[0010] In order to be able to achieve not only form-locking coupling but also fixation with the help of a coupling / fixing arrangement structure, it is proposed that: the coupling / fixing arrangement structure includes a coupling mechanism and the mating coupling / fixing arrangement structure includes a mating coupling mechanism, the coupling mechanism has a coupling recess which is open opposite to the sliding movement direction and constitutes a coupling back-cut area transversely to the sliding movement direction or / and along the sliding movement direction, and the mating coupling mechanism has a coupling protrusion area, when the bracket unit moves into the working position along the sliding movement direction and the mating coupling mechanism is introduced into the coupling recess, the coupling protrusion area is positioned in such a way as to be embedded in the coupling back-cut area, so that a form-locking coupling engagement that is effective essentially orthogonal to the sliding movement direction is formed between the coupling mechanism and the mating coupling mechanism along the coupling direction.

[0011] It should be pointed out at this point that within the meaning of the present invention, the form-locking coupling is produced in the following situation or in the following way, that is, the relevant components are positioned in such an overlapping or overlapping manner with each other that a force in the direction in which the form-locking coupling is effective can be transmitted between the relevant components, i.e. the coupling mechanism and the mating coupling mechanism, for example after the components have approached each other and come into contact with each other when a force is applied in the direction in which the form-locking coupling is effective.

[0012] In a structurally simple design, the movement stop can include the coupling mechanism, and the mating movement stop can include the mating coupling mechanism.

[0013] In order to fix the support unit relative to the base unit in the reached working position, the coupling mechanism can be moved substantially orthogonally to the sliding movement direction in a fixing direction substantially opposite to the coupling direction for fixing the support unit relative to the base unit.

[0014] In order to be able to produce this movement, the coupling / fixing arrangement can comprise a coupling mechanism drive for moving the coupling mechanism at least in the fixing direction.

[0015] For a mechanically simple yet nevertheless reliable and fast design, it is proposed that the coupling mechanism drive is a pressure fluid drive having a first pressure fluid chamber to be supplied with pressure fluid for moving the coupling mechanism in a fixed direction.

[0016] In order to also enable the bracket unit to be released from the base unit quickly and reliably, the coupling mechanism drive can include a second pressure fluid chamber to be supplied with pressure fluid for moving the coupling mechanism in a direction opposite to the securing direction. In this embodiment, the coupling mechanism drive, which is designed as a pressure fluid drive, is thus designed to be double-acting, so that no additional structural measures, such as preload mechanisms or the like, are required to force a movement of the coupling mechanism, for example, opposite to the securing direction.

[0017] The coupling mechanism drive may, for example, comprise a cylinder region arranged on a base body of the basic unit and a piston region connected to the coupling mechanism for joint movement and movably accommodated in the cylinder region.

[0018] In order to define a defined positioning of the bracket unit relative to the base unit, a rotational position defining arrangement may be provided for defining the rotational position of the bracket unit positioned in the working position relative to the base unit about an axis substantially orthogonal to the sliding movement direction.

[0019] In order to supply a pressure-fluid-operated tool arranged on a support station with pressure fluid, for example for fixing a workpiece and / or transmitting sensor signals about its operating state to a basic unit, it is proposed that a connecting device is provided for connecting the support unit positioned in the working position with the basic unit for transmitting pressure fluid and / or electrical signals.

[0020] The invention further relates to a workstation, in particular for producing components for exhaust systems of internal combustion engines, comprising at least one, preferably a plurality of, replacement carrier systems designed according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in detail below with reference to the accompanying drawings.

[0022] Figure 1 A perspective view showing a base unit of a replacement rack system;

[0023] Figure 2 Shown along Figure 1 The line II-II in the Figure 1 A cross-sectional view of a basic unit;

[0024] Figure 3 A perspective view showing a rack unit of a replacement rack system;

[0025] Figure 4 Shown with Figure 1 The basic unit is coupled Figure 3 A perspective view of a bracket unit;

[0026] Figure 5 Shown along Figure 4 The line VV cuts through Figure 4 A cross-sectional view of the composite body shown in FIG.

[0027] Figure 6 The schematic diagram shows a workstation having a plurality of changing rack systems arranged thereon. DETAILED DESCRIPTION

[0028] In subsequent reference Figures 1 to 5 Before describing in detail the construction of the replacement bracket system, refer to Figure 6 Explaining the exemplary principle design of such a workstation, the replacement rack system can be used in a particularly advantageous manner, but not exclusively, for positioning components or parts to be welded together in the workstation for an exhaust system of an internal combustion engine.

[0029] exist Figure 6 The workstation 10 shown by way of example in FIG. 1 comprises a workpiece support assembly 12 that can be driven by a drive assembly 14 for rotation about an axis of rotation D. The workpiece support assembly 12 is coupled to the drive assembly 14 in one of its axial end regions. In the other axial end region, the workpiece support assembly 12 is coupled to a mating support assembly 16, so that the workpiece support assembly 12 is positioned or supported in a defined manner for rotation about the axis of rotation D.

[0030] In the example shown, three preferably identically designed replacement support systems 18 are arranged one after another on the workpiece support assembly 12 in the direction of the rotation axis D. A component or a component of an exhaust system for an internal combustion engine, for example, is mounted as a workpiece W in each replacement support system 18 and connected to one another by one or more welding robots 20.

[0031] With the aid of the replacement support system 18, the workpiece W can be quickly and reliably positioned on the workpiece support structural assembly 12 in a manner and method that will be described in more detail below in order to carry out the required work process, in particular a welding process, and can be removed from the workpiece support structural assembly just as quickly after carrying out this work process, in order then, for example, to position another workpiece on the workpiece support structural assembly 12 for the purpose of re-performing such a work process.

[0032] Such a replacement support system 18 has its main system area in Figures 1 to 5 The replacement bracket system 18 includes Figure 1 and Figure 2, which has a base body 24 consisting of a plurality of components. The base body 24 comprises a base plate 26, in the central region of which a recess 28 for receiving a coupling / fixing arrangement, generally designated 30, is provided.

[0033] The coupling / fixing arrangement 30 comprises a coupling mechanism 32 in which a coupling recess 34 is formed. The coupling recess 34 is arranged substantially opposite to the coupling mechanism. Figure 1 The recess 28 formed in the base plate 26 is also open in the region where the coupling member 32 or the coupling recess 34 formed therein is open opposite to the sliding movement direction S. The coupling recess 34 forms an undercut region 36 on the coupling member 32 in a direction Q transverse to the sliding movement direction S and in the sliding movement direction S.

[0034] The piston region 40 of the coupling mechanism drive 42, designed as a pressure fluid drive, is fixedly connected to the coupling mechanism 32 via a connecting plate 38. The piston region 40 is movably accommodated in a cylinder region 44. In the cylinder region 44, which is formed in a cylinder block 46, a first pressure fluid chamber 48 and a second pressure fluid chamber 50 are formed, separated from each other by the piston region 40. By supplying pressure fluid, such as compressed air or a pressurized liquid such as oil or the like, into the first pressure fluid chamber 48, the piston region 40 and the coupling mechanism 32 are moved along the fixed direction F, which is substantially perpendicular to the sliding movement direction S and the direction Q, or are acted upon by a force acting in the fixed direction F. By supplying pressure fluid into the second pressure fluid chamber 50, the piston region 40 and the coupling mechanism 32 are moved along the fixed direction F, which is substantially perpendicular to the sliding movement direction S and the direction Q, or are acted upon by a force acting in this direction. When pressure fluid is supplied to one of the two pressure fluid chambers 48, 50, the other of the two pressure fluid chambers 48, 50 is released for discharge of the pressure fluid in order to enable movement of the piston region 40. A pressure fluid source, such as a compressor, a pump, or a pressure fluid reservoir, can be provided for supplying the pressure fluid, and the pressure fluid is supplied to the first pressure fluid chamber 48 or the second pressure fluid chamber 50, for example, via a valve arrangement under the control of an actuation unit, depending on the respective direction of movement or direction of force to be set.

[0035] Sliding guide recesses 60, 62 of the sliding guide formations of the basic unit 22, generally designated 64, are provided on the base plate 26 on both sides of the coupling / fixing arrangement 30 with respect to the sliding movement direction S by means of the sliding guide parts 52, 54 or 56, 58 fixed thereto. The sliding guide recesses 60, 62 are located opposite one another in a direction Q transverse to the sliding movement direction S and are open toward one another and also extend through the sliding movement direction S, preferably without interruption.

[0036] Furthermore, a rotational position defining arrangement 73 is provided on the base unit 22 or the bracket unit 68. The rotational position defining arrangement 73 includes an opening 74 on the bracket plate 72 of the bracket unit 68, which is open in the sliding movement direction S. A pin 76, which is supported on the bottom plate 26 of the base unit 22 and projects opposite to the sliding movement direction S, engages in the opening when the bracket unit 68 is positioned in the operating position. As a result, the bracket unit 68 is held in a defined rotational position relative to the base unit 22 about an axis A that is orthogonal to the sliding movement direction S or direction Q.

[0037] The support plate 72 supports guide plates 78, 80 in its two end regions, which are located in a direction Q transverse to the sliding movement direction S. These guide plates form sliding guide projections 82, 84 on the support plate 72, which are oriented away from each other in the direction Q and extend in the sliding movement direction S. When the support unit 68 moves in the sliding movement direction S toward the base unit 22, the sliding guide projections 82, 84 penetrate into the sliding guide recesses 60, 62, which are generally open in the sliding movement direction S, and guide the support unit 68 in these recesses as the sliding movement in the sliding movement direction S continues. As a result, the sliding guide projections 82, 84 essentially provide mating sliding guide formations 86, which, in cooperation with the sliding guide formation 64 having the sliding guide recesses 60, 62, bring about a defined sliding movement guidance of the support unit 68 relative to the base unit 22.

[0038] A substantially mushroom-shaped mating coupling member 88 is also provided on the carrier plate 72, positioned on the side thereof facing the base plate 26. The mating coupling member 88 essentially provides a mating coupling / fixing arrangement 89 and forms a coupling projection region 90, which is adapted in terms of its shape and also its dimensions to the shape and dimensions of the coupling undercut region 36 of the coupling member 32.

[0039] When the support unit 68 is moved in the sliding movement direction S toward the base unit, in particular when the sliding guide projections 82, 84 are guided in the sliding guide recesses 60, 62, the counter-coupling member 88 enters the coupling recess 34 of the coupling member 32, while the coupling projection region 90 enters the coupling undercut region 36. As a result, the coupling member 32, with its region surrounding the coupling recess 34 and forming the coupling undercut region 36, overlaps the coupling projection region 90 of the counter-coupling member 88 on its side facing the support plate 72, and a positive coupling engagement effective in the coupling direction K is produced between the coupling member 32 and the counter-coupling member 88. It should be emphasized that in the positive coupling engagement between the coupling member 32 and the counter-coupling member 88 produced by the movement of the support unit 68 into the operating position, the counter-coupling member 88 and the coupling member 32 do not necessarily have to be in abutting contact with each other in the coupling direction K. In principle, there can be a small amount of play between them in the coupling direction K. In this state, the positive fit between the base unit 22 and the bracket unit 68 in the coupling direction K due to the interaction of the sliding guide projections 82 , 84 with the sliding guide recesses 60 , 62 can also prevent the bracket unit 68 from moving away from the base unit 22 in the coupling direction K.

[0040] The defined positioning of the bracket unit 68 relative to the base unit 22 in the sliding movement direction S is predetermined by the movement stop 66. This movement stop is essentially provided by the coupling member 32 together with the coupling recess 34 formed therein. The mating movement stop 70 is essentially provided by the mating coupling member 88, which, when reaching the operating position, is introduced into the coupling recess 34 to such an extent that the end of the coupling recess is reached and the mating coupling member 68 thus abuts against the coupling member 32.

[0041] After reaching the operating position defined by the interaction of the movement stop 66 and the mating movement stop 70, the bracket unit 68 may become loosened from the base unit 22 in a direction opposite to the sliding movement direction S. To prevent this, after reaching the operating position and establishing the positive-locking coupling engagement between the coupling mechanism 32 and the mating coupling mechanism 88, which is generally established, the coupling mechanism drive 42 can be activated, for example, by manually inputting an activation command. When the coupling mechanism drive 42 is activated, pressurized fluid is supplied to the first pressure fluid chamber 48, thereby moving the coupling mechanism 32 in a fixing direction F, which is substantially opposite to the coupling direction K, into the recess 28 formed in the base plate 26. During this movement, the coupling mechanism 32 rests against the mating coupling mechanism 88, which is in positive-locking engagement with it in the coupling direction K, or the coupling mechanism 32 entrains the mating coupling mechanism 88, which is engaged by it, or acts upon the mating coupling mechanism with a force acting in the fixing direction F. As a result, the carrier plate 72 is moved in the direction of the base plate 26 or is loaded with a force acting in this direction. In this case, direct contact can be established between the carrier plate 72 and the base plate 26, or plates 78, 80 provided on the carrier plate 72 and providing the sliding guide projections 82, 84 can be pressed onto the plate-shaped sliding guide parts 54, 58, which together with the L-shaped sliding guide parts 52, 56 form the sliding guide recesses 60, 62.

[0042] Due to the coupling engagement and the positive fit acting in the coupling direction K, the support unit 68 is fixed to the base unit 22 by a pressing action acting in the fixing direction F and the resulting force-locking or frictional fit, preventing movement opposite to the sliding direction S. In this state, such a replacement support system 18 can then be used to carry out a work process, such as a welding process, on a workpiece supported thereon. In order to mount such a workpiece on the support unit 68, for example, a workpiece plate 92 can be provided on the support plate 72, in which a plurality of fixing openings, such as internally threaded openings, can be provided, so that the workpiece can be fixed to the workpiece plate 92 by means of a suitable holding device or a holding tool provided for this purpose.

[0043] Such a holding tool can also be operated using a pressurized fluid, such as compressed air. In order to be able to guide the pressurized fluid into the area of ​​the support unit 68, a connecting device generally indicated by 96 is provided. This connecting device includes a basic connecting member 98, which is fixed to a support structure 100 of the base body 24, such as the support base plate 26. In conjunction with the basic connecting member 98, the connecting device 96 includes a support connecting member 102 on the support unit 68. This support connecting member can be supported on a plate 104 fixed to the workpiece plate 92 and / or the support plate 72, which is opposite the support structure 100 or the basic connecting member 98 when the support unit 68 is positioned in the working position.

[0044] When the support unit 68 approaches the working position or reaches the working position, the base connection part 98 and the support connection part 102 come into contact with each other, thereby establishing a fluid exchange connection between the line area provided on the base unit 22 and the line area provided on the support unit 68. A signal transmission connection for transmitting electrical signals, in particular sensor signals, between the support unit 68 and the base unit 22 can also be established by means of the connection device 96 when the support unit 68 is positioned in the working position, so that sensor signals from a sensor provided on the support unit 68, which detects, for example, the correct holding of a workpiece, can be transmitted to the base unit or a control unit coupled thereto. When moving out of the working position, this connection is interrupted. In particular, to prevent fluid leakage, a valve provided on the base connection part 98 in the area of ​​the base unit can close the line area provided on the base unit.

[0045] If the bracket unit 68 is to be released from the base unit 22 after the working process is completed, the coupling mechanism drive 42 can be actuated by the actuation unit in such a way that the coupling mechanism 32 releases the mating coupling mechanism 88. This is achieved in the illustrated embodiment by supplying pressurized fluid into the second pressurized fluid chamber 50 and moving the coupling mechanism 32 opposite to the securing direction F, i.e., in the coupling direction K. The bracket unit 68 can then be removed from the base unit 22 opposite to the sliding movement direction S, and another bracket unit 68 can be fastened to the same base unit 22.

[0046] The interchangeable support system constructed according to the present invention makes it possible to fasten the support units to the base unit or to detach them from the base unit in a simple and quick manner and, for example, to position the workpiece to be processed in the workstation or to remove it from the workstation after the work process has been carried out. Alternatively, the workstation can be used for different work processes, for example, for processing different workpieces, by using different types of support units. The interchangeable support system is structurally simple to implement and, due to its essentially modular structure, reduces the required support surface area for its individual system areas. Due to the universal availability of such an interchangeable support system, it is possible to provide interchangeable support systems of identical construction even in internationally operated units during central procurement, which can contribute to significant cost savings.

Claims

1. A replacement support system comprising a base unit (22) and a support unit (68) to be releasably fixed to the base unit (22) in a working position, wherein: - a coupling / fixing arrangement (30) is provided on the basic unit (22) and a matching coupling / fixing arrangement (89) is provided on the bracket unit (68), the matching coupling / fixing arrangement being able to be placed in a form-locking coupling engagement with the coupling / fixing arrangement (30) when the bracket unit (68) is slidably moved in the sliding movement direction (S) into the working position, and the bracket unit (68) can be fixed relative to the basic unit (22) by the coupling / fixing arrangement (30) when the bracket unit (68) is positioned in the working position, - the coupling / fixing arrangement (30) comprises a coupling mechanism (32), and the mating coupling / fixing arrangement (89) comprises a mating coupling mechanism (88), the coupling mechanism (32) having a coupling recess (34) which is open opposite to the sliding movement direction (S) and forms a coupling undercut region (36) transversely to the sliding movement direction (S) or / and along the sliding movement direction (S), and the mating coupling mechanism (88) has a coupling projection region (90), when the bracket unit (68) moves into the working position along the sliding movement direction (S) and the mating coupling mechanism (88) is introduced into the coupling recess (34), the coupling projection region (90) is positioned in such a way as to engage with the coupling undercut region (36), so that a positive coupling engagement effective orthogonal to the sliding movement direction (S) is formed between the coupling mechanism (32) and the mating coupling mechanism (88) along the coupling direction (K), - A sliding guide forming portion (64) is provided on the basic unit (22), and a matching sliding guide forming portion (86) is provided on the bracket unit (68). When the bracket unit (68) moves to the working position along the sliding movement direction (S), the bracket unit (68) is guided by the sliding guide forming portion (64) and the matching sliding guide forming portion (86) to move along the sliding movement direction (S). One of the sliding guide forming portion (64) and the matching sliding guide forming portion (86) includes two forming portions that are opposite to each other transverse to the sliding movement direction (S). The invention relates to a sliding guide recess (60, 62) which is open to each other and extends in the sliding movement direction (S), and the sliding guide forming part (64) and the other forming part of the matching sliding guide forming part (86) include two sliding guide protrusions (82, 84) which are oriented away from each other transversely to the sliding movement direction (S) and extend in the sliding movement direction (S), and when the bracket unit (68) moves in the direction of the sliding movement direction (S) toward the working position, each sliding guide protrusion (82, 84) is accommodated in a sliding guide recess (60, 62) for movement in the sliding movement direction (S), - A motion stop portion (66) is provided on the basic unit (22), and a matching motion stop portion (70) is provided on the bracket unit (68); when the bracket unit (68) moves along the sliding motion direction (S) to the working position, when the working position is reached, the matching motion stop portion (70) abuts against the motion stop portion (66); the motion stop portion (66) includes the coupling mechanism (32), and the matching motion stop portion (70) includes the matching coupling mechanism (88).

2. The bracket replacement system according to claim 1, characterized in that: The one forming portion of the sliding guide forming portion (64) and the mating sliding guide forming portion (86) is the sliding guide forming portion (64), and the other forming portion of the sliding guide forming portion (64) and the mating sliding guide forming portion (86) is the mating sliding guide forming portion (86).

3. The bracket replacement system according to claim 1 or 2, characterized in that: The coupling mechanism (32) can move orthogonally to the sliding movement direction (S) along a fixing direction (F) opposite to the coupling direction (K) to fix the bracket unit (68) relative to the basic unit (22).

4. The bracket replacement system according to claim 3, characterized in that: The coupling / fixing arrangement (30) comprises a coupling mechanism drive (42) for moving the coupling mechanism (32) at least in a fixing direction (F).

5. The bracket replacement system according to claim 4, characterized in that: The coupling mechanism drive (42) is a pressure fluid drive having a first pressure fluid chamber (48) to be supplied with pressure fluid for moving the coupling mechanism (32) in a fixed direction (F).

6. The bracket replacement system according to claim 5, characterized in that: The coupling mechanism drive device (42) comprises a second pressure fluid chamber (50) to be supplied with pressure fluid for moving the coupling mechanism (32) in a direction opposite to the fixing direction (F).

7. The bracket replacement system according to claim 5, characterized in that: The coupling mechanism drive device (42) includes a cylinder region (44) arranged on a base body (24) of the basic unit (22) and a piston region (40) connected to the coupling mechanism (32) for joint movement and movably accommodated in the cylinder region (44).

8. The bracket replacement system according to claim 1 or 2, characterized in that: A rotational position defining arrangement (73) is provided for defining the rotational position of the bracket unit (68) positioned in the working position relative to the base unit (22) about an axis (A) orthogonal to the sliding movement direction (S).

9. The bracket replacement system according to claim 1 or 2, characterized in that: A connecting device (96) is provided for connecting the bracket unit (68) positioned in the working position with the basic unit (22) for transmitting pressure fluid and / or electrical signals.

10. A workstation comprising at least one changing rack system (18) according to any one of claims 1 to 9.

11. The workstation according to claim 10, characterized in that The workstation comprises a plurality of changing rack systems (18) according to any one of claims 1 to 9.

12. The workstation according to claim 10 or 11, characterized in that The workstation is provided for producing components for an exhaust system of an internal combustion engine.

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