MOUNTING ELEMENT FOR THE INTERIOR FITTING OF A SWITCH CABINET HOUSING AND A CORRESPONDING SWITCH CABINET ARRANGEMENT

Description

[0001] The invention relates to a mounting element for the internal construction of a control cabinet housing, wherein the mounting element comprises a mounting rail which has a clamping element at a first of its opposite longitudinal ends and a support element at the second longitudinal end. Such a mounting rail is known from DE 10 2011 119 277 B3.

[0002] DE 10 2008 052291 A1 describes a mounting element in which the clamping section has U-shaped flanges connected to each other, between which a screw drive acts. EP 1 965 626 A1 describes a telescopic mounting rail with locking means at its opposite longitudinal ends. DE 10 2006 015317 A1 discloses a mounting rail along which a fastening element can be variably locked.

[0003] The mounting elements known from the prior art feature a clamping element that pivots relative to the mounting rail according to the toggle lever principle in order to clamp the mounting element in a control cabinet housing. However, the pivoting movement of the clamping element causes the mounting element to shift, at least slightly, during clamping. Due to the associated tolerances, this complicates the further internal assembly of the control cabinet housing. Furthermore, the toggle lever principle has the disadvantage that it can only accommodate manufacturing tolerances on the control cabinet side to a very limited extent, particularly with regard to the distance between the opposing contours of the control cabinet housing between which the mounting element is to be installed.

[0004] The object of the invention is therefore to further develop a mounting element of the type described above in such a way that it can be clamped inside a control cabinet housing in a process-reliable manner and is also suitable for reacting to manufacturing tolerances on the side of the control cabinet.

[0005] This problem is solved by a mounting element with the features of claim 1. Dependent claim 20 relates to a corresponding control cabinet arrangement. Advantageous embodiments are the subject of the respective dependent claims.

[0006] Accordingly, a mounting element is designed so that the clamping element is adjustable in the longitudinal direction of the mounting rail by means of a drive acting between the mounting rail and the clamping element. The clamping element is connected to the mounting rail via a linear guide. The linear guide can also be provided solely by the drive. For example, the drive can be designed as a threaded bolt that drives the clamping element in the longitudinal direction with respect to the mounting rail.

[0007] Alternatively, the threaded bolt can extend at an acute angle to the longitudinal direction, with the clamping element and the mounting rail being guided relative to each other in the longitudinal direction by a linear guide. The linear guide can have at least one guide flange which is supported on a longitudinally extending sliding surface of the mounting rail and guided in the longitudinal direction. The mounting rail can have a projecting profile face on its end face, via which the clamping element is coupled to the mounting rail, and via which the mounting rail is supported on the clamping element and guided in the longitudinal direction.

[0008] The longitudinal adjustability allows for flexible adaptation to tolerances in the clear installation dimensions between the opposing contours of the control cabinet housing, between which the mounting element is to be installed. Furthermore, this longitudinal adjustability ensures that the mounting element does not tilt or otherwise shift in a direction perpendicular to the longitudinal direction of the mounting rail during clamping.

[0009] The drive can act between an end face of the mounting rail at its first longitudinal end and an actuating flange of the clamping element. Accordingly, the mounting rail can have an end face that serves as a mounting-rail-side support bearing for the drive, or against which the clamping element is supported via the drive. This ensures that the mounting rail can be covered essentially along its entire length, since neither the clamping element nor the drive extends over or obscures the mounting rail.

[0010] The clamping element can be arranged with the actuating flange inside the mounting rail and protrude from the mounting rail beyond its end face via a slide connected to the actuating flange. In this embodiment, it is also ensured that the clamping element does not impair the mounting rail's ability to be covered. The slide can have a spring constant or elasticity suitable for absorbing a clamping force. In one embodiment, the slide can have a rigid slide plate onto whose edge facing away from the mounting rail a spring element for absorbing the clamping force is mounted, the spring element having a suitable spring constant or elasticity for this purpose.

[0011] The drive can be a screw drive that extends through the end face of the mounting rail at the first longitudinal end of the mounting rail with at least one threaded bolt. This embodiment also ensures that the drive does not impair the mounting rail's ability to be covered with other materials. Preferably, the screw drive has two independently driveable threaded bolts; however, a single threaded bolt may suffice.

[0012] The clamping element and support element can be identical, allowing the mounting rail to be flexibly mounted with respect to its orientation relative to the control cabinet housing. Alternatively, the support element can be designed according to the type of support element known from DE 10 2011 119 277 B3 or DE 10 2014 111 806 A1.

[0013] The mounting rail can have a profile side on the end face with at least one unthreaded opening for the threaded bolt, and an actuating flange of the clamping element with an internal thread aligned with the opening for the respective bolt can be arranged on an inside side of the profile side facing the interior of the mounting rail.

[0014] The profile side with the threadless opening and the actuating flange with the internal thread can extend parallel to each other.

[0015] The profile side with the threadless opening and the actuating flange with the internal thread can extend at an obtuse angle to a connecting profile side of the mounting bracket that extends parallel to the longitudinal direction. The connecting profile side can then connect two further parallel profile sides of the mounting bracket, which also extend parallel to the longitudinal direction of the mounting bracket and perpendicular to the connecting profile side.By maintaining the obtuse angle, it is ensured that the drive, for example a threaded bolt of the drive and a complementary internal thread, can be operated reliably even when the mounting element is positioned outside the clear opening dimension of a control cabinet housing, for example between the rear wall of the control cabinet housing and a profile of the control cabinet that limits a door opening of the control cabinet.

[0016] The clamping element can be guided along the inner and / or outer circumference of the mounting rail in the longitudinal direction. In principle, the clamping element and the mounting rail can be guided and connected to each other solely via the drive mechanism, for example, a threaded bolt that passes through the mounting rail and is screwed into a threaded receptacle on the clamping element. The clamping element and the mounting rail can be guided linearly relative to each other and, in addition, can be positively locked to each other via complementary surfaces along which they can be locked relative to each other in the longitudinal direction of the mounting rail.

[0017] The clamping element can be guided and supported along the inner or outer circumference of the mounting rail in the longitudinal direction, following a C-shaped or U-shaped contour perpendicular to the longitudinal direction. For this purpose, the mounting rail can preferably have a connecting profile side extending parallel to the longitudinal direction, preferably flat, to create the C-shaped or U-shaped contour. This connecting profile side serves as a mounting surface for control cabinet components, mounting chassis, and the like. The connecting profile side links two further profile sides of the mounting rail parallel to each other, which can also extend parallel to the longitudinal direction and perpendicular to the profile side used. The connecting profile side and / or the further profile sides can have a system of perforations consisting of regularly spaced and shaped openings for accommodating standard fasteners used in switchgear and control system construction.

[0018] The clamping element can have at least one guide flange extending parallel to the longitudinal direction of the mounting rail, via which the clamping element is guided and supported on the inner circumference of the mounting rail.

[0019] The guide flange can be supported on the inside of a connecting profile side of the mounting rail extending parallel to the longitudinal direction, which connects two further profile sides of the mounting rail that are parallel to each other and extend parallel to the longitudinal direction and perpendicular to the connecting profile side.

[0020] The guide flange can be arranged at an end of the clamping element facing away from the end face of the longitudinal end of the mounting rail that carries the clamping element. The guide flange can preferably be located adjacent to and at an angle of more than 90° and less than 180° to an actuating flange of the clamping element. The mounting rail can have a projecting profile face at its end face, with which the mounting rail is supported on a slide of the clamping element. The clamping element can project beyond the end face of the mounting rail via the slide.

[0021] Preferably, the mounting rail is supported with a protruding profile side on the slider of the clamping element and the clamping element is supported with a guide flange on the inside of the connecting profile side of the mounting rail.

[0022] The clamping element and / or the support element may have a spring element at its free end facing away from an end face of the mounting rail. This spring element preferably has a spring stiffness that is at least less than the spring stiffness of other components of the clamping element and / or the spring stiffness of the mounting rail. For example, the spring element may have a lesser spring stiffness than a slide of the clamping element with which the clamping element projects from the mounting rail and over the end face of the mounting surface. The spring element may be frictionally attached to the slide or otherwise.

[0023] The spring element and the remaining clamping element and / or the remaining support element can be designed as sheet metal parts. The sheet thickness of the spring element can be less than the sheet thickness of the remaining clamping element and / or the remaining support element.

[0024] The spring element can be detachably attached to a free end of the clamping element and / or the support element facing away from the end face. Preferably, the spring element can be attached to a slide of the clamping element, with which the clamping element projects beyond the end face from the mounting rail. The spring element can be detachably and thus replaceably mounted on the free end of the clamping element, particularly on a slide of the clamping element, by means of a positive and / or frictional connection.

[0025] The spring element can have at least one longitudinally projecting contact claw at its end furthest from the front face. Preferably, the entire mounting element is made of electrically conductive material, in particular electrically conductive sheet steel. Potential equalization between the optionally painted control cabinet housing and the mounting element can be established via the contact claws. Typically, in this application, the control cabinet housing is grounded. By clamping the clamping element against the mounting rail, the contact claw can penetrate the paint layer of the control cabinet housing and make electrical contact with the metal of the control cabinet housing beneath the paint.

[0026] The spring element can be a sheet metal part having, at its end furthest from the end face, a longitudinally elastic sheet metal tab with at least one notch or recess for receiving a positioning stud of a control cabinet housing with a studded pattern. The sheet metal tab can preferably also have at least one longitudinally projecting contact lug. Such a control cabinet housing with a studded pattern is described in DE 10 2014 111 896 A1.

[0027] The spring element can be designed to absorb all elastic deformation occurring during the clamping of the mounting element inside the control cabinet, thereby providing the required clamping force. This effectively prevents mechanical overloading of the mounting rail caused by clamping to the housing. To achieve this, the spring element, particularly the one already described, can have a significantly lower spring stiffness compared to the mounting rail and other components of the clamping and support elements. For example, the spring element can be made with a sheet metal thickness that is considerably thinner than that of the other components of the mounting element.

[0028] For example, if the spring element is a sheet metal part, it can have a U-shaped fold on each of the opposite sides, which has at least one further contact claw projecting in the longitudinal direction at its end facing away from the front face.

[0029] Due to the U-shaped design of the folded edge, the additional contact claw formed therein can exhibit a stiffness and / or positional stability greater than the stiffness and / or positional stability of a longitudinally projecting contact claw formed on a spring-elastic sheet metal tab of the spring element of the type described above. The contact claw on the spring-elastic sheet metal tab can therefore project further in the longitudinal direction in the unloaded state of the spring element than the additional contact claw on the U-shaped folded edge.The contact claw on the spring-elastic sheet metal tab can serve as a positioning aid for the mounting element in the control cabinet housing, such that even in the unstressed state of the clamping element, the spring element provides an initial contact force through manual elastic deformation when inserting it into the control cabinet housing, whereby the spring-elastic sheet metal tab is supported on the control cabinet housing via its contact claw.

[0030] According to another aspect of the invention, a control cabinet arrangement is described which has at least one mounting element of the type described above in a control cabinet housing. The mounting element extends inside the control cabinet housing along an outer wall of the housing and is mounted in this position within the housing. The mounting element can be mounted between a rear wall of the control cabinet housing and a profile of the control cabinet housing that defines a door opening, wherein the mounting element can be supported on the rear wall by the support element and clamped to the profile by the clamping element.

[0031] By positioning the mounting element in the manner described above, possibly with at least partial preload of the spring-elastic sheet metal tab of the spring element between the rear wall and the profile limiting the door opening, possibly with further assistance from a studded embossing on the control cabinet housing that engages corresponding recesses on the sheet metal tab of the spring element, a tensioning of the mounting element in relation to the control cabinet housing can be achieved by actuating the drive, for example by screwing a bolt into the mounting element via the end face.

[0032] Further details of the invention are explained with reference to the figures below. These show: Figure 1 shows an exemplary embodiment of a mounting element according to the invention in perspective; Figure 2 shows a detailed view of the first end with support section according to the embodiment according toFigure 1 in exploded view; Figure 3 a longitudinal cross-section of the first end with support section of the embodiment according to Figure 1 Figure 4 shows an exemplary embodiment of a control cabinet arrangement in perspective view; and Figure 5 shows the control cabinet arrangement according to Figure 4 in cross-section.

[0033] The Figure 1Figure 1 shows an exemplary embodiment of a mounting element 1 for the internal construction of a control cabinet housing. The mounting element 1 essentially consists of a mounting rail 2, which has a clamping element 3 and a support element 4, respectively, at its opposite longitudinal ends 7, 8. The clamping element 3 and the support element 4 can be identical, allowing the mounting rail 1 to be flexibly mounted with respect to its orientation relative to the control cabinet housing. Alternatively, the support element 4 can also be designed according to the type of support element known from DE 10 2011 119 277 B3 or DE 10 2014 111 896 A1.

[0034] It can be seen that the support element 4 and the clamping element 3 do not obstruct or otherwise interfere with the mounting rail 2, so that the mounting rail 2 can be used along its entire length for fastening components and for interior finishing. In particular, the clamping element 3 is only connected via the end face 6 of the mounting rail 2. Similarly, the drive 5, by means of which the clamping element 3 is adjustable in the longitudinal direction x of the mounting rail 2, only acts on the end face 6 of the mounting rail 2.

[0035] The exploded view according to Figure 2Figure 1 shows that the mounting rail 2 is closed at its end face 6 by a profile side 12. The profile side 12 has openings 13 for two screw bolts 11. The openings 13 are unthreaded, so the screw bolts 11 can pass through the openings 13 without resistance. The profile side 12 is supported on the clamping element 3 by two projecting profile sides 12.1 when the clamping element 3 is in the position shown. Figure 1 The clamping element 3 is arranged in the mounting position shown. In the mounting position, the clamping element 3 with its actuating flange 9 is arranged inside the mounting rail 2, i.e. in the space enclosed by the connecting profile side 14 and the two further profile sides 15 of the mounting rail 2, wherein the clamping element 3 with a slide 10 connected to the actuating flange 9 projects out of the mounting rail 2 via the end face 6.

[0036] The mounting rail 2 has a projecting profile side 12 at its end face 6, which supports the mounting rail 2 on the slide 10 of the clamping element 3. More precisely, the two projecting profile sides 12.1 of profile side 12 (one would suffice) extending parallel to the longitudinal direction x of the mounting rail 2 are supported on the slide 10. The clamping element 3 is guided and supported on the inner circumference of the mounting rail 2 by at least one, in this case two, guide flange 16 extending parallel to the longitudinal direction x of the mounting rail 2.

[0037] A spring element 17 is frictionally fitted to an end edge of the slide 10 facing away from the mounting rail 2 and extending perpendicular to the longitudinal direction x. The spring element 17 has a lower spring stiffness compared to the other components of the mounting element 1. In particular, the spring element 17 has a lower spring stiffness than the mounting rail 2 and the other components of the clamping element 3, especially than the actuating flange 9 and slide 10, which are manufactured as a single piece. The spring element 17 can also be made of a thinner sheet metal compared to the mounting rail 2 and the other components of the clamping element 3.As shown, the mounting element, in particular the mounting rail 2 and the clamping element 3, is largely designed as sheet metal parts, so that the previously described adjustment of the spring stiffness can be achieved, for example, by choosing a comparatively smaller sheet thickness for the design of the spring element 17.

[0038] The spring element 17 has a sheet metal tab 20 at its end facing away from the mounting rail 2, via which the spring element 17 makes contact with a control cabinet housing. For electrical contact, particularly for equipotential bonding, the sheet metal tab 20 has at least one contact claw 18. The sheet metal tab 20 is formed by a bend at a free end of the spring element 17, so that the sheet metal tab, including the contact claw 18, is spring-elastic. Furthermore, the spring element 17 has an additional contact claw 19 projecting in the x-direction and away from the mounting rail 2 on each of its opposing outer U-bends.

[0039] The spring elasticity of the spring element 17, in particular of the end-end sheet metal tab 20, can be adjusted such that the spring element 17 has a sufficient clamping force for positioning the mounting element 1 on the control cabinet housing, which the spring element 17 provides when the mounting element 1 is inserted into the control cabinet housing. The sheet metal tab 20 can have recesses 22 or notches which serve to receive studs of a studded pattern on the control cabinet housing. This concept is known in principle from DE 10 2014 111 896 A1.

[0040] The Figure 3 shows the clamping element 3 in its state mounted on the mounting rail 2, in which, as with reference to Figure 2As already indicated, the clamping element 3, in particular an actuating flange 9 of the clamping element 3 with its horizontal guide flange 16 extending parallel to the longitudinal direction x, rests slidably against the inside or underside of the connecting profile side 14 in the longitudinal direction x. Conversely, the mounting rail 2 with its profile side 12.1 projecting in the adjustment direction x is supported on a slide 10 of the clamping element 3. The opening 13 in the profile side 12 of the mounting rail 2 aligns with an internal thread 13.1 of the actuating flange 9 of the clamping element 3. The actuating flange 9 and the profile side 12 extend parallel to each other and at an obtuse angle to the connecting profile side 14 and the slide 10.This ensures that, in the case of a mounting element 1 mounted in the control cabinet housing along an inner side of an outer wall of the control cabinet housing, where the end face 6 of the mounting element 1 may be concealed by a contour of the control cabinet housing, for example by a profile on a door opening of the control cabinet housing, a tool for driving the threaded bolt 11 can be brought into engagement with the threaded bolt 11 past the profile.

[0041] The Figure 4 and 5Figure 1 shows an application of a mounting element 1 according to the invention, in which the mounting element 1 is mounted between a profile 105 of a control cabinet housing 100, which defines a door opening 104, and a rear wall of the control cabinet housing 100 (not shown). While the support section of the mounting element 1 (not shown) rests against the rear wall and, if applicable, engages with a studded pattern on the rear wall, analogous to the clamping element 3, the clamping element 3 faces the door-side profile 105 and is mounted against it. It can be seen that the mounting element 1 is arranged at least largely outside the clear opening dimension of the door opening 104, meaning that the end face 6 of the mounting element 1 is concealed by the profile 105. The accessibility of the threaded bolt 11 is further enhanced by the already described [reference to relevant section / document]. Figure 3 The described angulation of profile side 12 is achieved.

[0042] This is in Figure 5illustrated. By maintaining an obtuse angle between the profile side 12 of the mounting rail 2 and both the slider 10 (see Figure 3 A threaded bolt 11 can be engaged with a tool, in this case a screwdriver 103, on both the mounting rail 2 and the connecting profile side 14, even though the end face 6 of the mounting rail 2 is located outside the clear opening dimension of the door opening 104. The end face 6 is aligned with the profile 105. Since the mounting rail 1 can be positioned outside the clear opening dimension of the door opening 104, it does not present an obstruction during the internal assembly of the control cabinet housing 100. For example, the installation of a mounting plate inside the control cabinet housing, which may have dimensions close to the opening cross-section of the door opening 104, is not hindered.

[0043] In summary, the Figure 4 and 5It can also be seen that when the clamping element 3 is tightened, i.e., when the threaded bolts 11 are screwed into the clamping element 3, the sheet metal tab 20 with its associated contact claws 18 first comes into contact with the profile 105 over its entire surface, and the contact claws 18 are thereby driven into the profile 105 or into a coating on the profile 105. In this process, the sheet metal tab 20 is moved from an angled position, in which its free edge protrudes away from the mounting profile 2, into the Figure 5 The recognizable upright position is pre-tensioned so that the further contact claw 19 on the U-shaped bend 22 also comes into contact with the profile 105 and, analogous to the contact claw 18, makes electrical contact with the metal of the control cabinet housing 100 through any existing coating of the control cabinet housing 100. Reference symbol list:

[0044] 1 Mounting element 2 Mounting rail 3 Clamping element 4 Support element 5 Drive 6 End face 7 First longitudinal end 8 Second longitudinal end 9 Actuating flange 10 Slider 11 Threaded bolt 12 Profile side 12.1 Protruding profile side 13 Through hole 13.1 Internal thread 14 Connecting profile side 15 Further profile side 16 Guide flange 17 Spring element 18 Contact claw 19 Further contact claw 20 Sheet metal tab 21 Recess 22 U-shaped fold 100 Control cabinet housing 101 Positioning folder 102 Outer wall 103 Screwdriver 104 Door opening 105 Profiling x Longitudinal direction

Claims

1. Mounting element (1) for the interior fitting of a switch cabinet housing (100), wherein the mounting element (1) has a mounting rail (2) which has a clamping element (3) at a first of its opposite longitudinal ends (7) and a support element (4) at the second longitudinal end (8), characterized in that the clamping element (3) is connected to the mounting rail (2) via a linear guide and is adjustable in the longitudinal direction (x) of the mounting rail (2) with respect to the mounting rail (2) via a drive (5) acting between the mounting rail (2) and the clamping element (3).

2. Mounting element (1) according to claim 1, in which the drive (5) acts between an end side (6) of the mounting rail (2) at the first longitudinal end (7) and an actuating flange (9) of the clamping element (3).

3. Mounting element (1) according to claim 2, in which the clamping element (3) is arranged with the actuating flange (9) in the interior of the mounting rail (2) and projects out of the mounting rail (2) via the end side (6) with a slide (10) connected to the actuating flange (9).

4. Mounting element (1) according to one of the preceding claims, in which the drive (5) is a screw drive which extends with a threaded bolt (11) through an end side (6) of the mounting rail (2) at the first longitudinal end (7).

5. Mounting element (1) according to claim 4, in which the mounting rail (2) has a profile side (12) with at least one threadless aperture (13) for the threaded bolt (11) at the end side (6), wherein an actuating flange (9) of the clamping element (3) with an internal thread (13.1) for the threaded bolt (11) aligned with the aperture (13) is arranged on an inner side of the profile side (12) facing the interior of the mounting rail (2).

6. Mounting element (1) according to claim 5, in which the profile side (12) with the threadless aperture (13) and the actuating flange (9) with the internal thread (13.1) extend parallel to one another.

7. Mounting element (1) according to claim 5 or 6, in which the profile side (12) with the threadless aperture (13) and the actuating flange (9) with the internal thread (13.1) extend at an obtuse angle to a connecting profile side (14) of the mounting rail (2) extending parallel to the longitudinal direction (x), which connecting profile side connects two further profile sides (15) of the mounting rail (2) parallel to one another, which likewise extend parallel to the longitudinal direction (x) and perpendicular to the connecting profile side (14), to one another.

8. Mounting element (1) according to one of the preceding claims, in which the clamping element (3) is guided in the longitudinal direction (x) of the mounting rail (2) on the inner circumference and / or on the outer circumference of the mounting rail (2).

9. Mounting element (1) according to claim 8, in which the clamping element (3) is guided and supported in the longitudinal direction (x) of the mounting rail (2) along a contour which is C-shaped or U-shaped in cross section perpendicular to the longitudinal direction (x) on the inner circumference and / or on the outer circumference of the mounting rail (2), for which purpose the mounting rail (2) as C-shaped or U-shaped contour preferably has a connecting profile side (14) extending parallel to the longitudinal direction (x), which connecting profile side connects two further profile sides (15) of the mounting rail (2) parallel to one another, which likewise extend parallel to the longitudinal direction (x) and perpendicular to the connecting profile side (14), to one another.

10. Mounting element (1) according to claim 8 or 9, in which the clamping element (3) has at least one guide flange (16) extending parallel to the longitudinal direction (x) of the mounting rail (2), via which guide flange the clamping element (3) is guided and supported on the inner circumference of the mounting rail (2).

11. Mounting element (1) according to claim 10, in which the guide flange (16) is supported on the inner side of a connecting profile side (14) of the mounting rail (2) extending parallel to the longitudinal direction (x), which connecting profile side connects two further profile sides (15) of the mounting rail (2) parallel to one another, which further profile sides extend parallel to the longitudinal direction (x) and perpendicular to the connecting profile side (14), to one another.

12. Mounting element (1) according to claim 10 or 11, in which the guide flange (16) is arranged at an end of the clamping element (3) facing away from the end side (6) of the longitudinal end of the mounting rail (2) having the clamping element (3), wherein the guide flange (16) is preferably formed adjacent to and at an angle of more than 90° and less than 180° to an actuating flange (9) of the clamping element (3).

13. Mounting element (1) according to one of claims 7 to 11, in which the mounting rail (2) has a projecting profile side (12.1) at the end side (6), with which profile side the mounting rail (2) is supported on a slide (10) of the clamping element (3), with which slide the clamping element (3) projects out of the mounting rail (2) via the end side (6).

14. Mounting element (1) according to one of the preceding claims, in which the clamping element (3) and / or the support element (4) has a spring element (17) at its free end facing away from an end side (6) of the mounting rail (2), which spring element preferably has a spring stiffness which is at least smaller than a spring stiffness of other components of the clamping element (3) and / or a spring stiffness of the mounting rail (2).

15. Mounting element (1) according to claim 14, in which the spring element (17) and the remaining clamping element (3) and / or the remaining support element (4) are shaped sheet metal parts, wherein a sheet metal thickness of the spring element (17) is smaller than a sheet metal thickness of the remaining clamping element (3) and / or of the remaining support element (4).

16. Mounting element (1) according to claim 14 or 15, in which the spring element (17) is releasably fastened to a free end of the clamping element (3) and / or of the support element (4) facing away from the end side (6), preferably to a slide (10) of the clamping element (3), with which slide the clamping element (3) projects out of the mounting rail (2) via the end side (6).

17. Mounting element (1) according to one of claims 14 to 16, in which the spring element (17) has at least one contact claw (18) projecting in the longitudinal direction (x) at its end facing away from the end side (6).

18. Mounting element (1) according to one of claims 14 to 17, in which the spring element (17) is a shaped sheet metal part which has a sheet metal tab (20) which is resilient in the longitudinal direction (x) and has at least one notch or recess (21) for receiving a positioning knob (101) at its end facing away from the end side (6), wherein the sheet metal tab (20) preferably also has at least one contact claw (18) projecting in the longitudinal direction (x).

19. Mounting element (1) according to one of claims 14 to 18, in which the spring element (17) is a shaped sheet metal part which has a U-shaped edge (22) in each case at opposite side edges, which edge has at least one further contact claw (19) projecting in the longitudinal direction (x) at its end facing away from the end side (6).

20. Switch cabinet arrangement having at least one mounting element (1) according to one of the preceding claims, which is mounted in the interior of a switch cabinet housing (100) along an outer wall (102) of the switch cabinet housing (100).

21. Switch cabinet arrangement according to claim 20, in which the mounting element (1) is mounted between a rear wall of the switch cabinet housing (100) and a profiling (105) of the switch cabinet housing (100) delimiting a door opening (104), wherein the support element (4) is supported on the rear wall and the clamping element (3) is clamped on the profiling (105).