Fixing device for a bushed bar fixed to a vehicle body structure

Abstract

The invention relates to a fixing device for a bushing bar to be fixed to a vehicle body structure, which bushing bar extends essentially in the Z direction and which can be fixed in an at least partially U-shaped structure, which structure extends essentially in the X direction, which structure has a base and a first and a second side face, which base extends in the X-Y direction, which first and second side faces extend essentially in the Z direction, wherein the bushing bar can be arranged and fixed essentially perpendicularly to the base face on and / or in the base, wherein the fixing device comprises a first diagonal strut and a second diagonal strut arranged parallel to the first diagonal strut, which first and second diagonal struts extend essentially perpendicularly to the longitudinal axis of the bushing bar in the Y direction and can be arranged in the U-shaped structure against the bushing bar, wherein each diagonal strut has a tongue bent parallel to the respective side face on at least one end, which tongue is supported on the side face, characterized in that the first diagonal strut and the second diagonal strut are connected to each other adjacent to the bushing bar by at least one first web extending in the X direction. The design of the fixing device according to the invention makes it possible to insert the fixing device onto the bushing bar and to clamp the bushing bar in the profiled part without loss and with positional accuracy for the subsequent suitable joining.

Description

TECHNICAL FIELD

[0001] The invention relates to a fixing device for a bushing rod fixed to a body structure, in particular for a motor vehicle. BACKGROUND

[0002] In the region of a profiled section, preferably a U-profiled section, there are often force-absorbing elements, such as bushing rods fixed to a body structure, which are then supported in the profiled section by means of a reinforcement panel. These reinforcement panels are used, for example, in motor vehicle construction. An example of the use of a reinforcement panel is, for example, as a chassis bushing for a joint axle bearing. In the body of all vehicles, the chassis bushing is joined to the profiled section in one or more method steps by means of suitable joining techniques (see Figure 1 and Figure 2 ). The bushing rod for the support is inserted into the profiled section, usually through a through-hole, and is itself joined to the profiled section. Further examples of use are, for example, axle bushings, or rear constructions of a motor vehicle with a cross member and, for example, with a joint for a high-voltage accumulator.

[0003] Such a panel construction is known, for example, from the German publication DE 102011015 542 Al.

[0004] The reinforcement panel supporting the bushing rod relative to the profiled section gives rise to a number of technical problems:

[0005] 1. The clamping of the aforementioned bushing rod via the panel or fixing device, according to the sequence of installation, is difficult to implement, which means that the precise positioning of the bushing rod in space is difficult.

[0006] 2. The automated installation of the fixing device leads to the use of a receiving nest, which obstructs the accessibility for the joining, for example spot welding, which leads to a number of joining steps in an unfavorable manner.

[0007] 3. The multi-part fixing device has to be joined in more than one joining step, which is complex and therefore expensive. SUMMARY

[0008] The task of the invention is to improve the quality and to reduce the installation costs of the reinforcement panel.

[0009] The task is solved in that the first and the second diagonal strut are connected to one another by means of at least one first web extending in the X direction adjacent to the bushing rod.

[0010] The fixing device or partition of the present invention is advantageously characterized in that the first and second diagonal braces each comprise two partition halves, and the first and second diagonal braces are interconnected by a first connecting piece. This first connecting piece enables the fixing device to be inserted into the bushing rod using three contact points, contact lines, or contact surfaces, and therein it is clamped securely and accurately in the molded portion, for example, in a U-shaped structure, preventing loss, and subsequently, the fixing device is material-locked together, for example, by welding.

[0011] According to a preferred embodiment of the invention, the first and second diagonal braces and the first connecting piece are one-piece and made of the same material, so that the fixing device can be formed as a single component. This single component can be manufactured at low cost, for example, by stamping and completed in its three-dimensional structure in a simple manner by bending a metal sheet.

[0012] According to one design of the present invention, the first tab has a first pressing portion that is elastic in the X direction, and this design allows the bushing rod to be clamped in an advantageous manner by means of a fixing device via the first elastic mechanism. This further improves the bushing rod's resistance to loss.

[0013] According to one design of the present invention, the first diagonal brace and the second diagonal brace are connected to each other adjacent to the bushing rod and parallel to the first connecting piece via the second connecting piece. This design allows for positioning of the bushing rod on all four sides for further improved positioning accuracy.

[0014] According to one design of the present invention, the second tab has a second pressing portion that is elastic along the X direction (X), which further improves the anti-loss and positioning accuracy of the bushing rod.

[0015] According to one design of the present invention, the first diagonal brace and / or the second diagonal brace have a tongue that is elastic in the X direction in the region of the bushing rod. The tongue elastically supports the fixing device relative to the bushing rod. This design further improves the positioning of the bushing rod in the X direction based on a second elastic mechanism.

[0016] According to one design of the present invention, the first and second diagonal braces each have a curved tongue at each end that is parallel to the corresponding side, the tongue being supported on the side. This design makes locking and fixing of the fixing device in the U-shaped structure easier.

[0017] According to one design of the present invention, each tongue is elastically supported on the first and / or second side surface, which makes it easier to install and fix the fixing device in the U-shaped structure or in the molded part.

[0018] According to one embodiment of the invention, which is a proven and advantageous implementation, the fixing device can be material-lockingly connected to the bushing rod and / or structure.

[0019] Particularly preferably, according to one design of the present invention, the connection is made by fusion welding or brazing.

[0020] According to one design of the present invention, the fixing device is preferably made of a metal material, such as steel or a light metal, such as aluminum, or of plastic, preferably glass fiber reinforced or carbon fiber reinforced plastic (GFK, CFK).

[0021] Furthermore, protection is required for motor vehicles equipped with the fixing devices according to the present invention. Attached Figure Description

[0022] The invention will now be briefly described with reference to two accompanying drawings based on the prior art and five accompanying drawings corresponding to the invention.

[0023] Figure 1 A top view of a first fixing device according to the prior art is shown;

[0024] Figure 2 A cross-sectional top view of a second fixing device according to the prior art is shown;

[0025] Figure 3 A top view of the first fixing device according to the present invention is shown;

[0026] Figure 4 A top view of the second fixing device according to the present invention is shown;

[0027] Figure 5 A schematic top view of the fixing device according to the present invention is shown;

[0028] Figure 6 A top view showing the unfolded form of the first fixing device according to the invention is shown;

[0029] Figure 7 An unfolded top view of the second fixing device according to the present invention is shown. Detailed Implementation

[0030] Next, the same reference numerals are used in the attached figures. Figures 1 to 7 The same applies to the same components.

[0031] Figure 1A top view is shown of a first fixing device 1 for fixing a bushing rod 2 to a vehicle body structure according to the prior art. The fixing device 1 is configured for a bushing rod 2 with a square cross-section in this embodiment, which extends substantially along the Z direction. The bushing rod 2 can be fixed in at least a partially U-shaped structure 3, i.e., a molded portion, which extends substantially along the X direction. This structure has a bottom and first and second side surfaces 4, 5, the bottom extending along the XY direction and the first and second side surfaces extending substantially along the Z direction. The bushing rod 2 is disposed substantially perpendicular to the bottom surface and fixed to the bottom 6. For this purpose, the bushing rod 2, for example, has... Figure 2 The visible, unmarked fixing feet are shown. This fixing can be achieved, for example, by friction welding. In another embodiment, the bushing rod 2 can also be inserted through a hole and engaged in the bottom 6.

[0032] exist Figure 1 The coordinate system in the lower left corner shows the X, Y, and Z directions.

[0033] The fixing device 1 basically includes a first diagonal brace 7 and a second diagonal brace 8 arranged parallel to the first diagonal brace 7. The first and second diagonal braces extend in the Y direction substantially perpendicular to the unmarked longitudinal axis of the bushing rod 2. The diagonal braces 7 and 8 abut against the bushing rod 2, and in the U-shaped structure 3, the diagonal braces extend from one side 4 to the opposite side 5, wherein each diagonal brace 7 and 8 has a tongue 9 and 10 at its end that bends parallel to the corresponding surface 4 and 5, and the tongue is supported on the side 5. In addition, the diagonal braces 7 and 8 have reinforcing recesses that are not marked.

[0034] Such a type of fixing device 1 or reinforcing partition is used, for example, in motor vehicle construction. An example application of the reinforcing partition is as a bushing in a running gear for engaging axle supports. A bushing rod 2 for support is inserted into and connected to, for example, a shaped section or U-shaped structure 3. Other application examples include axle bushings and rear structures of motor vehicles having crossbeams and, for example, engagement points for high-voltage storage devices.

[0035] Figure 2 A cross-sectional top view of a second fixing device according to the prior art is shown. In this view, fixing device 1 does not have a reinforcing recess. The unlabeled fixing foot of bushing rod 2 is clearly visible, which rests against the bottom 6 of U-shaped structure 3 and can also be connected to the bottom 6, for example, by friction welding. Bushing rod 2 has a centrally located hole 17, into which, for example, another component can be inserted and secured. In this embodiment, fixing device 1 extends beyond the fixing foot. Alternatively, bushing rod 2 may also have a circular or rectangular cross-section, for example (depending on the application of the bushing rod).

[0036] Figure 3A top view of the first fixing device for fixing the bushing rod 2 to the vehicle body structure according to the present invention is shown. Distinguished from... Figure 1 and Figure 2 In this embodiment, the first diagonal brace 7 and the second diagonal brace 8 are connected to each other adjacent to the bushing rod 2 via a first tab 11 and a second tab 13 extending in the X direction. In another embodiment, only a single tab 11 or 13 may be provided.

[0037] Furthermore, preferably, the first diagonal brace 7, the second diagonal brace 8, the first connecting piece 11, and the second connecting piece 13 are a single piece made of the same material. This is a preferred embodiment in which the fixing device 1 can be formed as a single component, compared to at least two components known in the prior art. The fixing device 1 can be formed, for example, in a simple and low-cost manner by means of a stamping method and subsequently a bending plate method.

[0038] Furthermore, the first tab 11 has a first pressing portion 12 that is elastic in the X direction, and the second tab 13 has a second pressing portion 14 that is also elastic in the X direction. This allows the bushing rod 2 to be clamped by means of the fixing device 1 using the first elastic mechanism in an advantageous manner. The anti-loss capability of the bushing rod 2 is further improved. In another embodiment, only one tab 11, 13 may have the aforementioned pressing portion.

[0039] Furthermore, the first diagonal brace 7 has a resilient tongue 15 in the X-direction within the region of the bushing rod 2, which resiliently supports the fixing device 1 relative to the bushing rod 2. This resilient tongue 15... Figure 5 and Figure 6 As shown in the figure. In another embodiment, the first diagonal brace 7 and / or the second diagonal brace 8 may also have such a resilient tongue 15. This design further improves the positioning of the bushing rod 2 along the X direction via the second elastic mechanism.

[0040] Furthermore, the first diagonal brace 7 and the second diagonal brace 8 each have curved tongues 9 and 10 extending parallel to the corresponding sides 4 and 5 at each end, and these tongues are supported on one side 4 and 5 respectively. This embodiment simplifies the locking and fixing of the fixing device 1 in the U-shaped structure 3, or in the U-shaped part. It is also possible that each diagonal brace 7 and 8 has only one unique curved tongue 9 and 10. However, the overall structural strength would then be less than that and the load limit would be smaller.

[0041] Furthermore, the tongues 9 and 10 are elastically supported on the first and / or second sides 4 and 5. This embodiment simplifies the locking and fixing of the fixing device 1 in the U-shaped structure 3, or in the U-shaped part.

[0042] The fixing device 1 is preferably connected to the bushing rod 2 and / or the U-shaped structure 3 in a material-locking manner. This can be done, for example, by welding or brazing. Alternatively, for fixing devices 1 made of plastic, bonding is also possible.

[0043] The fixing device 1 is preferably made of metal or plastic. Metal materials include, for example, steel or light metals such as aluminum alloys. Preferably, glass fiber reinforced plastic (GFK) or carbon fiber reinforced plastic (CFK) is used as the plastic. For plastics, adhesive bonding is preferred.

[0044] Figure 4 A top view of the second fixing device 1 for fixing the bushing rod 2 to the vehicle body structure according to the present invention is shown. Figure 3 Compared to the previous implementation, the second diagonal brace 8 and the tongue 10 are interconnected by an additional diagonal brace (not shown) parallel to the bottom plane of the U-shaped structure 3. This implementation simplifies the fixing of the fixing device 1 in the U-shaped structure 3 because the additional diagonal brace can be directly connected to the bottom 6, for example, by welding, such as spot welding. Furthermore, the structural rigidity of the fixing device 1 is improved. Based on this design, the recesses for enhancing rigidity in the first diagonal brace 7 and the second diagonal brace 8 can be reduced or completely eliminated.

[0045] Figure 5 A schematic top view of the fixing device 1 for fixing the bushing rod 2 to the vehicle body structure according to the present invention is shown. Figure 5 As can be clearly seen in this embodiment, the fixing device 1 surrounds the bushing rod 2, which has a square cross-section, on all four sides. Furthermore, in this embodiment, the first diagonal brace 7 has a tongue 15 that is elastic in the X-direction in the region of the bushing rod 2, which elastically supports the fixing device 1 relative to the bushing rod 2. This design further improves the positional positioning of the bushing rod 2 in the X-direction by the second elastic mechanism. Of course, the second diagonal brace 8 may also have a tongue 15 that is elastic in the X-direction.

[0046] In addition, the first tab 11 and the second tab 13 have first and second pressing portions 12 and 14 that are elastic in the X direction.

[0047] also, Figure 5 Four welding electrodes 16 are shown, illustrating how the fixing device 1 can be welded, for example, to the bushing rod 2 and the first and second sides 4, 5 of the U-shaped structure 3. Brazing or bonding (depending on the material of the fixing device 1) can also be used as the connection method.

[0048] Therefore, the installation of the fixing structure 1 in the U-shaped structure 3 can be carried out using the following steps:

[0049] Fix the bushing rod 2 to the bottom 6 of the U-shaped structure 3;

[0050] The fixed structure 1 is introduced into the U-shaped structure 3 and positioned radially outside around the bushing rod 2;

[0051] Fix the fixing structure 1 to the bushing rod 2 and fix it to the first and / or second side 4, 5.

[0052] Figure 6 An expanded top view of the first fixing device 1 for fixing a bushing rod 2 to a vehicle body structure according to the invention is shown. The bushing rod is a single piece and is made of the same material, for example, as a metal stamping. The bushing rod 2 is shown again in the center, and the fixing device 1 extends around the bushing rod. Figure 6 In this embodiment, the first diagonal brace 7 of the fixing device 1 has a tongue 15 that is elastic in the X direction, which elastically supports the fixing device 1 relative to the bushing rod 2.

[0053] Figure 7 An expanded top view of the second fixing device 1 according to the invention is shown, which is also a one-piece device and made of the same material, for example, as a metal stamping. A bushing rod 2 is also shown in the center, around which the fixing device 1 extends. Figure 7 In this embodiment, the first diagonal brace 7 and the second diagonal brace 8 are again connected to each other adjacent to the bushing rod 2 by a first tab 11 and a second tab 13 extending in the X direction. The first tab 11 has a first pressing portion 12 that is elastic in the X direction, and the second tab has a second pressing portion 14 that is elastic in the X direction.

[0054] from Figures 5 to 7 It can be seen that the fixing device 1 according to the present invention may have a tongue 15 that is elastic in the X direction, and / or the first connecting piece 11 may have a first pressing part 12 that is elastic in the X direction, and the second connecting piece may have a second pressing part 14 that is elastic in the X direction.

[0055] The fixing device 1, according to the design of the present invention, can be inserted into the bushing rod 2 and clamp the bushing rod in the U-shaped structure 3 in a way that prevents loss and is accurately positioned so that it can be properly joined together, for example by welding.

[0056] List of reference numerals

[0057] 1. Fixing device

[0058] 2. Bushing rod

[0059] 3. U-shaped structure

[0060] 4. First side view

[0061] 5. Second side view

[0062] 6. Bottom

[0063] 7. First diagonal brace

[0064] 8. Second diagonal brace

[0065] 9. The tongue of the first diagonal brace

[0066] 10. The tongue of the second diagonal brace

[0067] 11. First stitching

[0068] 12. First Suppression Section

[0069] 13. Second splicing

[0070] 14. Second Suppression Section

[0071] 15. A flexible tongue

[0072] 16. Welding electrode

[0073] 17. Kong

[0074] XX direction

[0075] YY direction

[0076] ZZ direction

Claims

1. A fixing device (1) for a bushing rod (2), the bushing rod being fixed to a vehicle body structure, the bushing rod extending in the Z direction and capable of being fixed in at least a partially U-shaped structure (3), the U-shaped structure extending in the X direction, the U-shaped structure having a bottom and a first side (4) and a second side (5), the bottom extending in the XY direction, the first side and the second side extending in the Z direction, wherein, The bushing rod (2) can be arranged perpendicularly to the bottom surface and fixed on and / or in the bottom (6), wherein the fixing device (1) includes a first diagonal brace (7) and a second diagonal brace (8) arranged parallel to the first diagonal brace (7), the first diagonal brace and the second diagonal brace extending perpendicularly to the longitudinal axis of the bushing rod (2) in the Y direction and being arranged to abut against the bushing rod in the U-shaped structure (3), wherein each diagonal brace has a tongue (9, 10) at at least one end that is curved parallel to the corresponding side, the tongue being supported on the side. The first diagonal brace (7) and the second diagonal brace (8) are connected to each other adjacent to the bushing rod (2) by at least one first connecting piece (11) extending in the X direction. The first diagonal brace (7), the second diagonal brace (8) and the first connecting piece (11) are one piece and made of the same material, so that the fixing device is formed as a single component.

2. The fixing device according to claim 1, characterized in that, The first tab (11) has a first pressing portion (12) that is elastic along the X direction (X).

3. The fixing device according to claim 1, characterized in that, The first diagonal brace (7) and the second diagonal brace (8) are adjacent to the bushing rod (2) and parallel to the first connecting piece (11) and connected to each other through the second connecting piece (13).

4. The fixing device according to claim 3, characterized in that, The second tab (13) has a second pressing part (14) that is elastic along the X direction (X).

5. The fixing device according to any one of claims 1 to 4, characterized in that, The first diagonal brace (7) and / or the second diagonal brace (8) have elastic tongues in the X direction in the region of the bushing rod (2), which elastically support the fixing device (1) relative to the bushing rod (2).

6. The fixing device according to any one of claims 1 to 4, characterized in that, The first diagonal brace (7) and the second diagonal brace (8) have tongues (9, 10) at each end that are curved parallel to the respective side surfaces and are supported on the side surfaces.

7. The fixing device according to any one of claims 1 to 4, characterized in that, The tongues (9, 10) are elastically supported on the first side (4) and / or the second side (5).

8. The fixing device according to any one of claims 1 to 4, characterized in that, The fixing device (1) can be material-locked to the bushing rod (2) and / or the U-shaped structure (3).

9. The fixing device according to claim 8, characterized in that, The connection between the fixing device (1) and the bushing rod (2) and / or the U-shaped structure (3) is made by fusion welding or brazing.

10. The fixing device according to any one of claims 1 to 4, characterized in that, The fixing device (1) is made of metal or plastic.

11. A motor vehicle having a fixing device according to any one of claims 1 to 10.

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